Patent Application
20120153873
This application contains subject matter related to and claims the benefit of the following Japanese Patent Applications: No. 2010-282307 filed on Dec. 17, 2010, No. 2010-282308 filed on Dec. 17, 2010, and No. 2011-206305 filed on Sep. 21, 2011. The contents of each of the foregoing applications are hereby incorporated by reference in their entirety.
1. Field of the Disclosure The present disclosure relates to a straight-tube light-emitting diode (LED) lamp switch device that can be attached to a lamp fixture, and also relates to a straight-tube LED lamp using the switch device.
2. Description of the Related Art
In recent years, a LED lamp using a light-emitting diode (LED) as a light source has gained popularity. The LED lamp can reduce power consumption and carbon dioxide emission and y increase the life of a product as compared with a conventional lamp. A straight-tube LED lamp from among such a LED lamp is receiving attention as an alternate lamp of a conventional fluorescent lamp.
An example of this straight-tube LED lamp is suggested (for example, see Japanese Unexamined Patent Application Publication No. 2010-192229). In particular, elastically urged switch pins protrude outward from caps arranged at both ends of the straight-tube LED lamp, and portions of the switch pins pushed when the straight-tube LED lamp is attached to a fluorescent-lamp fixture change application of electricity to the LED. With this straight-tube LED lamp, a situation in which electric current flows to a worker when the straight-tube LED lamp is attached to the fluorescent-lamp fixture or when the straight-tube LED lamp is removed from the fluorescent-lamp fixture can be prevented. Hence, safety during the work can be ensured.
In the straight-tube LED lamp described in Japanese Unexamined Patent Application Publication No. 2010-192229, the switch pins protrude outward from the caps arranged at both ends. Hence, the straight-tube LED lamp can be attached to a fluorescent-lamp fixture of a type configured such that a terminal at one end of a straight-tube fluorescent lamp is inserted into one socket and then a terminal at the other end is inserted into the other socket; however, it is difficult to attach the straight-tube LED lamp to a fluorescent-lamp fixture of a type configured such that terminals at both ends of a straight-tube fluorescent lamp are simultaneously attached to sockets.
Embodiments of the present disclosure provide a straight-tube LED lamp switch device that can be attached to a fluorescent-lamp fixture of any of a type configured such that a terminal at one end of a straight-tube fluorescent lamp is inserted into one socket and then a terminal at the other end is inserted into the other socket and a type configured such that terminals at both ends of a straight-tube fluorescent lamp are simultaneously attached to sockets. Various embodiments of the present disclosure also provide a straight-tube LED lamp using the straight-tube LED lamp switch device.
A straight-tube LED lamp switch device according to an aspect of the present disclosure includes a housing having an opening; a pair of first terminals that protrudes from the housing in one direction and is attached to a socket of a lamp fixture; an operating body including an operating portion that protrudes from the opening in the one direction and can receive a pressing operation into the housing; a second terminal, a conduction state of the second terminal with respect to one of the first terminals being changed by the pressing operation on the operating body; and an elastic member that restores the operating body to an initial state before the pressing operation. The housing has therein a housing portion that houses the operating portion when the pressing operation is performed on the operating body. The operating body is tilted by a pressing operation from at least one side of opposite directions with respect to the one direction of the first terminals. When the operating body is tilted, at least part of the operating portion is housed in the housing portion, and the one of the first terminals is brought into conduction with the second terminal.
With this configuration, at least the part of the operating portion is housed in the housing by the pressing operation into the housing and the pressing operation from at least one side of the opposite directions with respect to the protruding directions of the first terminals. Hence, the first terminal and the second terminal are brought into conduction. Accordingly, even when the switch device is attached to a fluorescent-lamp fixture of any of a type configured such that a terminal at one end of a straight-tube fluorescent lamp is inserted into one socket and then a terminal at the other end is inserted into the other socket and a type configured such that terminals at both ends of a straight-tube fluorescent lamp are simultaneously attached to sockets, the operating body can be housed in the housing portion and the first terminal can be brought into conduction with the second terminal. The switch device can be attached to any type of the fluorescent-lamp fixture.
In the above-described straight-tube LED lamp switch device, the operating body may be tilted by a pressing operation from both sides of the one side and the other side that are opposite to each other with respect to the one direction of the first terminals. In this case, since the operating body may be tilted by the pressing operation from both sides of the one side and the other side, limitation for an attachment direction to the fluorescent-lamp fixture can be eliminated. Attaching a straight-tube LED lamp to a fluorescent-lamp fixture therefore can be easily performed.
In the above-described straight-tube LED lamp switch device, the housing portion may include a guide portion that guides the operating body when the operating portion is housed by the pressing operation on the operating body. The operating portion may include a first pressed portion that receives a pressing operation from the one side, and a second pressed portion that receives a pressing operation from the other side. The operating body may be tilted and pushed into the housing portion by the pressing operation from the one side or the other side. In this case, since the operating portion may include the first pressed portion that receives the pressing operation from the one side and the second pressed portion that receives the pressing operation from the other side, the operating body can be tilted and pushed into the housing portion with a simple configuration in accordance with the pressing operation from the one side or the other side. Also, since the housing portion includes the guide portion that guides the operating body, the operating portion can be smoothly housed in the housing portion by the pressing operation.
In the above-described straight-tube LED lamp switch device, a cross-sectional shape of the operating portion in a cross-sectional plane parallel to a plane containing extending directions of both the pair of first terminals may have a smaller width at a vertex portion at a distal end than a width at a portion near the opening. The first pressed portion may be provided at one outline portion with respect to the vertex portion of the cross-sectional shape. The second pressed portion may be provided at the other outline portion of the cross-sectional shape. The tilting by the pressing operation from the one side or the other side may be movement along the plane containing the extending directions of both the pair of first terminals. In this case, since the operating portion may move along the plane containing the extending directions of the pair of first terminals, the straight-tube LED lamp can be easily attached to a fluorescent-lamp fixture of a type configured such that terminals at both ends of a straight-tube fluorescent lamp are simultaneously attached to sockets.
In the above-described straight-tube LED lamp switch device, the operating body may include a protrusion protruding in a direction intersecting with the cross-sectional plane. In the initial state, the protrusion may be supported by a support portion provided at the housing portion. In this case, since the protrusion may be received by the support portion using an urging force of the elastic member, the operating body can be prevented from rattling. Also, the protrusion serves as a stopper and hence the operating body can be prevented form being dropped from the opening.
In the above-described straight-tube LED lamp switch device, the first pressed portion and the second pressed portion may respectively include a first inclination portion and a second inclination portion having angles smaller than 90 degrees with respect to a surface of the housing having the opening. When one inclination portion of the first inclination portion and the second inclination portion comes into contact with the guide portion of the housing portion by the tilting, the other inclination portion may protrude from the opening. In this case, since the other inclination portion may protrude from the opening even if the one inclination portion of the first inclination portion and the second inclination portion comes into contact with the guide portion of the housing portion by the tilting, the pressing after the tilting can be reliably performed, and conduction between the first terminal and the second terminal can be ensured.
The above-described straight-tube LED lamp switch device may further include a movable contact that changes a conduction state between the one of the first terminals and the second terminal; and a driving member that is moved by the pressing operation on the operating body and drives the movable contact. The driving member may be arranged to move in a region between the pair of first terminals. In this case, since the driving member may be arranged to move in the region between the pair of first terminals, space utilization efficiency in the housing is increased.
In the above-described straight-tube LED lamp switch device, the operating body may be arranged in a region different from the region between the pair of first terminals, and may include a contact portion that is arranged at a position opposite to a distal end of the operating portion and that comes into contact with the driving member. The driving member may include a support portion that supports the contact portion, and the support portion may be urged to the contact portion by the elastic member. In this case, since the operating body may be arranged in the region different from the region between the pair of first terminals, even if a dent is present at a center portion of the socket, the operating body can receive the pressing operation into the housing. Also, since the operating body may include the contact portion, and the driving member may include the support portion that supports the contact portion, an additional member does not have to be provided and the operating body can be restored with a simple configuration. Accordingly, space utilization efficiency can be further increased.
In the above-described straight-tube LED lamp switch device, the contact portion of the operating body may be a recess, and the support portion of the driving member may be a protrusion. In this case, since the support portion that is the protrusion may support the contact portion that is the recess, the switch device can be downsized in the height direction.
In the above-described straight-tube LED lamp switch device, the housing portion that houses the operating portion may be provided in one region in the housing with respect to the plane containing the extending directions of both the pair of first terminals, and a movable contact that changes a conduction state between the one of the first terminals and the second terminal may be provided in the other region in the housing with respect to the plane containing the extending directions of both the pair of first terminals. In this case, since the operating portion may be housed in the one region in the housing with respect to a plane containing extending directions of both the pair of first terminals and the movable contact is provided in the other region, the space in the housing can be efficiently used. The components can be efficiently housed in the housing, and working efficiency when the components are assembled can be increased.
In the above-described straight-tube LED lamp switch device, the movable contact may be formed of a member different from the first terminals and the second terminal, may be arranged to face a first contact that is provided in conduction with the one of the first terminals and a second contact that is provided in conduction with the second terminal, and may come into contact with the first contact and the second contact by the pressing operation on the operating body. In this case, since the movable contact may be formed of the member different from the first terminals and the second terminal, an insulation distance between the contacts can be ensured. The level of insulation performance can be increased and the level of safety can be increased.
In the above-described straight-tube LED lamp switch device, the operating body may have a recess to face a distal end of the operating portion. A driving member being able to perform a seesaw motion may be arranged to pass through a region between the pair of first terminals, one end portion of the driving member being arranged in the recess, the other end portion of the driving member driving the movable contact. The one end portion of the driving member may be urged to the recess by the elastic member. In this case, since the driving member may be arranged to pass through the region between the pair of first terminals, the space utilization efficiency in the housing can be further increased. Also, since the driving member may perform the seesaw operation and drive the movable contact, the conduction state between the movable contact and the first contact, and between the movable contact and the second contact can be stably changed.
In the above-described straight-tube LED lamp switch device, a pair of the second terminals and a pair of the movable contacts may be provided respectively for the pair of first terminals. Conduction states may be changed through the movable contacts respectively corresponding to the first terminals and the second terminals. In this case, since the pair of second terminals and the pair of movable contacts may be provided respectively for the pair of first terminals, for example, this configuration can be applied to a straight-tube LED lamp with a power-feed structure from one straight-tube LED lamp switch device provided at an end of a lamp body.
Straight-tube LED lamp switch devices according to various embodiments of the disclosure may further include a movable contact that changes a conduction state between the one of the first terminals and the second terminal; and a driving member that is moved by the pressing operation on the operating body and drives the movable contact. The movable contact may include a protrusion arranged in a moving path of the driving member when the pressing operation is performed on the operating body, and a contact that can come into contact with and be separated from a first contact provided in conduction with the one of the first terminals and a second contact provided in conduction with the second terminal. In the initial state, the contact may be arranged to face the first contact and the second contact in a manner separated from the first contact and the second contact, and the contact may move to the first contact and the second contact when the driving member comes into contact with the protrusion. In this case, since the contact of the movable contact may be moved to the first contact and the second contact as the result of that the driving member comes into contact with the protrusion of the movable contact, the contact of the movable contact can come into contact with the first contact and the second contact by a simple configuration.
In the above-described straight-tube LED lamp switch device, the movable contact may be integrally provided with a cam body that rotates by the movement of the driving member. The cam body may include a shaft, and a pressed portion provided at a side opposite to the contact of the movable contact with respect to the shaft. In the initial state, the pressed portion may be pressed by the driving member, and the contact is separated from the first contact and the second contact. In this case, in the initial state, since the pressed portion of the cam body may be pressed by the driving member and the contact of the movable contact may be separated from the first contact and the second contact, even if the contacts are welded to each other, the contacts can be separated from each other because the pressed portion of the cam body is pressed by the driving member when the operating body is restored to the initial state. The conduction state between the first terminal and the second terminal can be properly changed.
In the above-described straight-tube LED lamp switch device, the cam body may include a base provided at a side opposite to the pressed portion with respect to the shaft. The base may be arranged between the contact and the first and second contacts, and when the pressed portion is pressed by the driving member, the cam body may rotate in a direction in which the contact is separated from the first contact and the second contact. In this case, when the pressed portion is pressed by the driving member, since the cam body may rotate in the direction in which the contact of the movable contact is separated from the first contact and the second contact, even if the contacts are welded to each other, the contacts can be effectively separated from each other.
A straight-tube LED lamp according to another aspect of the present disclosure includes a plurality of LEDs; a driving circuit that causes the LEDs to emit light; a cylindrical lamp body that houses the plurality of LEDs and the driving circuit; and any of the above-described straight-tube LED lamp switch devices provided at an end of the lamp body.
The following description is intended to convey a thorough understanding of the embodiments described by providing a number of specific embodiments and details involving a straight-tube LED lamp switch device. It should be appreciated, however, that the present invention is not limited to these specific embodiments and details, which are exemplary only. It is further understood that one possessing ordinary skill in the art, in light of known systems and methods, would appreciate the use of the invention for its intended purposes and benefits in any number of alternative embodiments, depending on specific design and other needs.
A straight-tube LED lamp switch device (hereinafter, merely referred to as “switch device”) according to an exemplary embodiment of the present disclosure is provided at an end of a straight-tube LED lamp, and changes an application state of electricity to a driving circuit (for example, AC/DC converter) mounted in the straight-tube LED lamp. In particular, a switch device 1 according to this embodiment can be attached to a fluorescent-lamp fixture of a type configured such that a terminal at one end of a straight-tube fluorescent lamp may be inserted into one socket and then a terminal at the other end may be inserted into the other socket (hereinafter, occasionally referred to as “first-type fluorescent-lamp fixture”) and a fluorescent-lamp fixture of a type configured such that terminals at both ends of a straight-tube fluorescent lamp may be simultaneously attached to sockets (hereinafter, occasionally referred to as “second-type fluorescent lamp fixture”).
As shown in
The outer case 2 may have a substantially cylindrical shape that is open to the lower side. A pair of through holes 21a and 21b may be formed in an upper surface of the outer case 2. Circular recesses 22a and 22b may be respectively formed in the peripheries of the through holes 21a and 21b. The recesses 22a and 22b may have an outer diameter slightly larger than an outer diameter of the through holes 21a and 21b. Hence, bottom walls may be provided at circumferences of the through holes 21a and 21b in the recesses 22a and 22b.
Also, a rectangular opening 23 may be formed in the upper surface of the outer case 2 at a position near the front side of the switch device 1. Sides in the longitudinal direction of the opening 23 may be arranged in parallel to a plane that passes through the pair of through holes 21a and 21b. A pair of recesses 24a and 24b may be formed at the outer periphery of the outer case 2, at positions at the lateral sides of the opening 23. The recesses 24a and 24b may extend to positions near a center portion of the outer case 2. Through holes 25a and 25b may be formed in bottom surfaces of the recesses 24a and 24b (the through hole 25b is not shown in
The inner case 3 may have a substantially circular shape in top view. The inner case 3 also may have an outer diameter corresponding to an inner periphery shape of the outer case 2. A pair of walls 31 (31a, 31b) extending in the up-down direction may be provided at the center of the inner case 3. The walls 31a and 31b may be arranged side by side at a constant distance provided therebetween in the left-right direction of the switch device 1. A cylindrical portion 32 having a substantially semicircular shape may be provided at a rear portion of the inner case 3 with respect to the walls 31a and 31b. A disk-like portion 33 having a substantially semicircular shape may be provided at a front portion of the inner case 3 with respect to the walls 31a and 31b. The disk-like portion 33 may extend from lower portions of the walls 31.
Flat surfaces 311 (311a, 311b) may be provided at inner portions of upper surfaces of the pair of walls 31. Columnar portions 312 (312a, 312b) may be provided outside the flat surfaces 311. Insertion holes 313 (313a, 313b) may be formed at positions near the centers of the flat surfaces 311. Fixing screws 11 (as described below, for example) may be inserted into the insertion holes 313. Also, slits 314 (314a, 314b) may be formed in the flat surfaces 311, at positions near the columnar portions 312 (the slit 314a is not shown in
A housing portion 321 having a substantially rectangular shape in top view may be provided in the cylindrical portion 32. The housing portion 321 may penetrate through the cylindrical portion 32 in the up-down direction. Although it is described later in detail, the movable contacts 7, the cam bodies 10 held thereby, and part of the driving member 8 may be housed in the housing portion 321. Support portions 322a to 322d having substantially rectangular-parallelepiped shapes may be provided at four corners of inner wall surfaces that define the housing portion 321 (the support portions other than the support portion 322b are not shown in
Also, recesses 323 with a predetermined depth may be provided at upper end portions of a pair of facing inner wall surfaces from among the inner wall surfaces that define the housing portion 321. The recesses 323 may be provided at positions for housing ribs (not shown) provided on a back surface of an upper surface portion of the outer case 2. The ribs housed in the recesses 323 may insulate the first terminals 5 and the second terminals 6 attached to the inner case 3 from each other. Further, slits 325 may be formed near the recesses 323. Portions of the holders 52 (described later) may be inserted into the slits 325.
A pair of support walls 34 (34a, 34b) may be arranged between the pair of walls 31. The support walls 34 may be vertically arranged on an upper surface of the disk-like portion 33. The support walls 34 may extend to substantially the same position as the upper surfaces of the walls 31. Recesses 341 having a substantially semicircular shape may be formed at rear sections of upper end portions of the support walls 34. The recesses 341 may house shafts 821 of the driving member 8 (as described below, for example) and may rotatably support the shafts 821. The pair of support walls 34a and 34b may be arranged with gaps interposed with respect to inner portions of the pair of walls 31a and 31b. Portions of the first terminals 5 and portions of the second terminals 6 may be arranged in the gaps.
A recess 331 may be provided at the upper surface of the disk-like portion 33, at a position between the pair of support walls 34. The recess 331 may house a torsion spring 12 (as described below, for example). A protruding piece 332 may be provided at an upper surface of the recess 331. The protruding piece 332 may position a wound portion 121 of the torsion spring 12. Also, a pair of through holes 333 (333a, 333b) may be formed at predetermined positions of the disk-like portion 33. The through holes 333a and 333b may be used when the switch device 1 is fixed to the lamp body by fixing members such as screws (not shown).
The insulating cover 4 may include a bottom portion 41 having a substantially rectangular shape, an insertion portion 42 provided at the center of an upper surface of the bottom portion 41, and fixing portions 43 provided at a pair of facing end portions of the bottom portion 41 and extending upward. The insertion portion 42 may have an outline corresponding to the inner wall of the housing portion 321 formed at the cylindrical portion 32 of the inner case 3. The housing portion 321 may be closed with the insertion portion 42. Accordingly, reliable insulation may be ensured with respect to the movable contacts 7 and other components housed in the housing portion 321.
A pair of support pieces 421a and 421b may be provided near each of a pair of facing ends of the insertion portion 42. The support pieces 421a and 421b may support the shafts 1012 of the cam bodies 10 housed in the recesses at the lower surfaces of the support portions 322a to 322d, from the lower side. The fixing portions 43 may fix the insulating cover 4 to the inner case 3. Openings 431 may be respectively formed at the centers of the fixing portions 43. The openings 431 may house protruding pieces 324 (not shown in
The first terminals 5 each may include a pair of cap pins 51 (51a, 51b) and holders 52 (52a, 52b). The cap pins 51 may be formed by machining a conductive metal material. The cap pins 51 each may have a substantially columnar shape. Collars 511 may be respectively provided near the centers of the cap pins 51. Columnar connection portions 512 may be respectively provided at the upper side of the collars 511. Also, cylindrical fixing portions 513 may be respectively provided at the lower side of the collars 511. Each fixing portion 513 may have a larger outer diameter than an outer diameter of each connection portion 512. Thread grooves may be formed at lower surfaces of the fixing portions 513. Fixing screws 11 may be fixed to the thread grooves.
The holders 52 may be formed by punching and bending conductive metal plates. The holders 52 each may include a flat surface 521, and a vertical surface 522 formed by bending a rear end portion of the flat surface 521 perpendicularly upward. A circular opening 521a may be formed at the center of a front portion of the flat surface 521. A pair of arms 521b may be provided at lateral sides of the opening 521a. The arms 521b may extend downward. A plurality of conductive pieces 521c may be provided at an inner peripheral portion of the opening 521a. The conductive pieces 521c may be pressed to the lower surfaces of the fixing portions 513 of the cap pins 51. A pair of bent portions 522a may be provided at side edges of each of the vertical surfaces 522. The bent portions 522a may extend to the rear side. The bent portions 522a may be arranged at the inner side form first contacts. The first contacts and second contacts (as described below, for example) may form fixed contacts. The movable contacts 7 may come into contact with may be are separated from the fixed contacts.
The second terminals 6 (6a, 6b) may be formed by punching and bending conductive metal plates. The second terminals 6 (6a, 6b) each may include a front terminal 61 and a rear terminal 62 that may be arranged in parallel to each other, and a coupling portion 63 that may couple the front terminal 61 with the rear terminal 62. The front terminal 61 and the rear terminal 62 may extend in the front-rear direction of the switch device 1. The coupling portion 63 may be arranged orthogonally to the front terminal 61 and the rear terminal 62.
The front terminal 61 may be provided at an inner side of a lower end of the coupling portion 63. The rear terminal 62 may be provided at an outer side of an upper end of the coupling portion 63. The second terminals 6a and 6b differ from each other in that the front terminals 61 and the rear terminals 62 may be provided at different positions with respect to the coupling portions 63. A front end portion of each of the front terminals 61 may have a downward bent shape. A connection portion 611 may be provided at a distal end of the downward bent shape. A lower end portion of the connection portion 611 may be exposed from a lower surface of the inner case 3, and may be connected to a connected terminal of the LED lamp body. A rear end portion of each of the rear terminals 62 may have an upward bent shape. A rectangular portion 621 may be provided at a distal end of the upward bent shape. The rectangular portion 621 may form the second contact.
The movable contacts 7 (7a, 7b) may be formed by punching and bending conductive metal plates. The movable contacts 7 each may include a base 71 provided at a center portion, a holder 72 provided to extend from a lower end of the base 71, and a contact 73 provided to extend from an upper end of the base 71. The base 71 may have a protrusion having an arc-like shape and protruding inward. The holder 72 may have a U-like shape in front view (in rear view). The holder 72 may hold a lower end portion of a base 101 of the cam body 10 (as described below, for example). A rectangular opening 721 may be formed at the center of the holder 72. The opening 721 may be arranged such that the longitudinal direction thereof may extend along the up-down direction. The opening 721 may be formed along a U-like portion. The opening 721 may allow an engagement piece 102 of the cam body 10 (described later) to protrude and to be engaged with a protruding piece 1013 of the cam body 10 (as described below, for example).
The contacts 73 each may include a first movable contact 731 and a second movable contact 732. The first movable contact 731 and the second movable contact 732 may be arranged to be separated from each other by a constant distance. Arc-like portions may be provided near upper ends of the first movable contact 731 and the second movable contact 732. The arc-like portions may protrude outward. Although the details are described below, the second movable contact 732 may include an electricity-application contact 732a and an auxiliary contact 732b formed by dividing the second movable contact 732. The auxiliary contact 732b may be provided to reduce an effect of arc discharge when the second movable contact 732 comes into contact with the second contact of the second terminal 6.
The driving member 8 may include a driving portion 81 provided at the rear side and a lever 82 extending from a front end portion of an upper surface of the driving portion 81 to the obliquely upper side. The driving portion 81 may have a substantially rectangular-parallelepiped shape. A plate portion 811 may be provided at the center of the upper surface of the driving portion 81. The plate portion 811 may extend upward. The plate portion 811 may prevent the bases 71 of the facing movable contacts 7a and 7b from coming into contact with each other.
The pair of shafts 821 may be provided near a rear end of the lever 82 (a coupling portion to the driving portion 81). The shafts 821 may extend in the left-right direction of the switch device 1. Also, a slightly protruding pressed portion 822 may be provided at a front end portion of an upper surface of the lever 82. A surface of the pressed portion 822 may have a substantially spherical shape. As described above, since the surface of the pressed portion 822 is spherical, the driving member 8 can be moved up and down flexibly in accordance with pressing or tilting of the operating body 9.
The torsion spring 12 that forms an elastic member may be arranged below the driving member 8. The torsion spring 12 may include the wound portion 121 and a pair of arms 122a and 122b extending from both ends of the wound portion 121. The one arm 122a may extend forward horizontally from a position near a lower end of the wound portion 121. The other arm 122b may extend forward to the obliquely upper side from a position near an upper end of the wound portion 121. A distal end of the arm 122b may be bent to the lateral side, and hence the arm 122b may have a substantially L-like shape.
The operating body 9 may be formed such that a cross-sectional shape of the operating body 9 in a cross-sectional plane parallel to a plane containing extending directions of both the pair of first terminals 5 (the cap pins 51) may have a smaller width at an upper portion than a width at a lower portion. For example, the operating body 9 may have a substantially triangular shape in front view. The operating body 9 may include a vertex portion 91 that is a distal end portion arranged at an upper end, a bottom surface 92 opposite to the vertex portion 91, a first pressed portion 93 provided at one outline portion with respect to the vertex portion 91, and a second pressed portion 94 provided at the other outline portion different from the first pressed portion 93 with respect to the vertex portion 91. The vertex portion 91, the first pressed portion 93, and the second pressed portion 94 may form an operating portion of the operating body 9.
A recess 921 may be provided at the center of the bottom surface 92. The recess 921 may be provided for housing the pressed portion 822 of the driving member 8. The recess 921 may be a contact portion that may come into contact with the driving member 8. The pressed portion 822 of the driving member 8 may function as a support portion that supports the contact portion. Also, since the pressed portion 822 has a protruding shape, the support portion that may be a protrusion (the pressed portion 822) supports the contact portion that may be a recess (the recess 921). Accordingly, the switch device 1 can be downsized in the height direction. A pair of protrusions 922a and 922b may be provided at a lower end portion of a front surface of the operating body 9. The protrusions 922a and 922b each may have a dimension corresponding to a length from an end of the bottom surface 92 to an end of the recess 921. Arc-like tapered surfaces may be provided at both ends of each of the protrusions 922a and 922b. Also, a pair of protrusions 923a and 923b may be provided at a lower end portion of a rear surface of the operating body 9 (the protrusion 923b is not shown in
The cam bodies 10 (10a, 10b) each may include the base 101 extending in the up-down direction, and the engagement piece 102 provided at a lower end of the base 101. Contact portions 1011 may be provided at upper portions of the bases 101. The contact portions 1011 can press the movable contacts 7 (7a, 7b). The shafts 1012 may be provided at lower end portions of front and rear surfaces of the bases 101. Also, the protruding pieces 1013 may be provided at lower end portions of side surfaces of the bases 101. The protruding pieces 1013 may be engaged with the openings 721 formed at the movable contacts 7 (7a, 7b).
The engagement pieces 102 may form pressed portions that receive a pressure from the driving portion 81 of the driving member 8. The engagement pieces 102 may extend downward from lower ends of the bases 101, and each may have a shape bent inward (substantially L-like shape) at the lower ends. The engagement pieces 102 may have dimensions such that the engagement pieces 102 can pass through the openings 721. Distal end portions of the engagement pieces 102 may protrude inward with respect to the positions of the holders 72 of the movable contacts 7 when the cam bodies 10 (10a, 10b) are held at the movable contacts 7 (7a, 7b).
In an initial state without a pressing operation, the first pressed portion 93 and the second pressed portion 94 of the operating body 9 may respectively have a first inclination portion 93a and a second inclination portion 94a having angles smaller than 90 degrees with respect to the flat-surface-like upper surface of the outer case 2. The operating body 9 held as described above, for example, can receive a pressing operation by the vertex portion 91, the first pressed portion 93, and the second pressed portion 94 forming the operating portion.
Also, a support wall 26c forming a support portion may be provided at an upper end portion of the housing portion 26. The support wall 26c may slightly protrude to the near side of the drawing in
As described above, in the switch device 1 according to this embodiment, the operating body 9 may be held at the initial position by the support walls 26c provided at the upper end portion of the housing portion 26 of the outer case 2. Accordingly, the operating body 9 can be prevented from being dropped from the outer case 2. Also, since the operating body 9 is held at the initial position by using the urging force of the torsion spring 12, the operating body 9 can be prevented from rattling in an operated state.
As shown in
The torsion spring 12 (not shown in
In the housing portion 321, the movable contacts 7 and the cam bodies 10 (10a, 10b) may be arranged at the lateral sides of the driving portion 81 of the driving member 8. The shafts 1012 of the cam bodies 10 may be housed in the recesses provided at the lower surfaces of the support portions 322a to 322d (not shown in
The flat surfaces 521 of the holders 52 (52a, 52b) of the first terminals 5 may be arranged on flat surfaces 311a and 311b of the walls 31a and 31b. In this case, the flat surfaces 521 may be arranged such that the openings 521a may correspond to the insertion holes 313 (313a, 313b) and the outer arms 521b are inserted into the slits 314 (314a, 314b). Also, the holders 52 may be arranged such that the vertical surfaces 522 extend along walls that are vertically arranged on rear end portions of the flat surfaces 311a and 311b. The inner bent portions 522a provided at the vertical surfaces 522 may be arranged to extend along inner wall surfaces that define the housing portion 321. The outer bent portions 522a may be inserted into the slits 325 formed at the cylindrical portion 32.
The fixing screws 11 may be inserted into through holes 313a and 313b from the lower side of the inner case 3, and penetrate through the openings 521a of the holders 52. The cap pins 51 of the first terminals 5 may be fixed to the fixing screws 11 protruding from the openings 521a. When surfaces of the holders 52 are fixed, the lower surfaces of the fixing portions 513 of the cap pins 51 may be in contact with the conductive pieces 521c of the holders 52. Accordingly, the cap pins 51 and the holders 52 may be brought into conduction.
The second terminals 6 may be arranged such that the rear terminals 62 may extend along the inner wall surfaces that define the housing portion 321 and the front terminals 61 pass through the gaps between the walls 31 (31a, 31b) and the support walls 34a and 34b. Also, front end portions of the front terminals 61 may protrude to the lower side of the disk-like portion 33 through slits (not shown) formed at the disk-like portion 33.
As shown in
As shown in
When the operating body 9 is in the non-operation state, the driving member 8 may receive the urging force of the torsion spring 12, one end of the driving portion 81 arranged at the rear side may be arranged near the insulating cover 4, and the other end of the driving portion 81 near the pressed portion 822 arranged at the front side may extend upward (see
The movable contacts 7 may be in a state in which the contacts 73 and the contact portions 1011 are rotated inward, and lower surfaces of the arc-like bases 71 are placed on an upper surface of the driving portion 81. At this time, the plate portion 811 provided at the upper surface of the driving portion 81 of the driving member 8 may be arranged between the bases 71 of the movable contacts 7 and may prevent the bases 71 from coming into contact with each other. The first movable contacts 731 may be arranged to face the first contacts formed of the bent portions 522a of the first terminals 5. The second movable contacts 732 may be arranged to face the second contacts formed of the rectangular portions 621 of the second terminals 6. When the driving portion 81 pushes down the engagement pieces 102, the first movable contacts 731 and the second movable contacts 732 may be separated from the first contacts of the first terminals 5 and the second contacts of the second terminals 6.
As shown in
When the cam bodies 10 rotate around the shafts 1012 as the rotation axes, the first movable contacts 731 of the contacts 73 of the movable contacts 7 may come into contact with the first contacts (the bent portions 522a). The auxiliary contacts 732b may come into contact with the second contacts (the rectangular portions 621), and then the electricity-application contacts 732a may come into contact with the second contacts (the rectangular portions 621). As described above, since the first movable contacts 731 and the second movable contacts 732 come into contact with the first contacts and the second contacts, an effect of arc discharge that may occur when the movable contacts 7 come into contact with the fixed contacts formed of the first and second contacts can be reduced.
In other words, if the auxiliary contacts 732b are not provided and the entire second movable contacts 732 come into contact with the second contacts, arc discharge may occur between the second movable contacts 732 and the second contacts at the time of contact. In this case, the occurrence of arc discharge may cause an adverse effect such that the entire second movable contacts 732 are welded to the second contacts. Since the auxiliary contacts 732b are provided and the second movable contacts 732 come into contact with the second contacts step by step as described above, even if arc discharge occurs at the auxiliary contacts 732b, arc discharge may be prevented from occurring at the electricity-application contacts 732a. As the result, even if a situation such as welding occurs because of arc discharge, the adverse effect can be reduced.
In the following description, the switch device 1 that is attached to one end of the straight-tube LED lamp is described as an example for convenience of the description. However, the switch device 1 may be attached to each of both ends of the straight-tube LED lamp.
As shown in
In the straight-tube LED lamp L, for example, the plurality of LEDs may be mounted on one surface of the substrate housed in the lamp body LA, and components other than the LEDs (for example, the AC/DC converter) may be mounted on the other surface. Hence, a portion of a peripheral surface of the lamp body LA corresponding to the one surface of the substrate with the LEDs mounted may form an emission surface L1, and a portion of the peripheral surface corresponding to the other surface of the substrate with the components other than the LEDs mounted may form a non-emission surface L2. For example, the components, such as a radiator plate, may be arranged in the portion of the lamp body LA corresponding to the non-emission surface L2. Alternatively, the cylindrical lamp body LA may be configured such that the portion of the lamp body LA at the non-emission surface L2 side may be formed of a metal case made of a metal material, the portion of the lamp body LA at the emission surface L1 side is formed of a light-transmissive resin case, and the metal case and the resin case are unitized. In this case, the metal case may be used as a radiator plate.
When the switch device 1 is attached, the cap pins 51 of the pair of first terminals 5 may be positioned with respect to the cap-pin insertion holes A3 and then may be inserted into the cap-pin insertion holes A3, so that the connection portions 512 of the cap pins 51 are connected with the connected terminals. In the switch device 1, as the result of this insertion operation, the vertex portion 91 of the operating body 9 may come into contact with the attachment surface (the recess A2) of the socket A1 and may be pressed into the outer case 2 (the housing portion 26). In this case, the operating body 9 may be guided to the lower side by the inner wall surfaces 26a and 26b of the housing portion 26. As described above, since the operating body 9 is guided by the inner wall surfaces 26a and 26b that are the guide portions provided at the housing portion 26, the operating body 9 can be smoothly housed in the housing portion 26 by the pressing operation in accordance with the insertion operation.
By the rotation of the driving member 8, the driving portion 81 may move upward while the driving portion 81 pushes and expands the bases 71 (the protrusions) of the movable contacts 7. In this case, the movable contacts 7 may rotate around the shafts 1012 of the cam bodies 10 held by the movable contacts 7, as the rotation axes. When the bases 71 move from the upper surface to the side surfaces of the driving portion 81, the first movable contacts 731 and the second movable contacts 732 of the movable contacts 7 come into contact with the first contacts and the second contacts (a state shown in
In contrast, when the switch device 1 is removed from the first-type fluorescent-lamp fixture A, the pressing operation on the operating body 9 may be released. Hence, the pressed portion 822 of the lever 82 of the driving member 8 may be pushed upward by the urging force of the torsion spring 12, and the driving member 8 may rotate around the shafts 821 as the rotation axis. By the rotation of the driving member 8, the driving portion 81 may move downward to a position near the insulating cover 4 (a state shown in
Also, in the switch device 1 according to this embodiment, when the pressing operation on the operating body 9 is released and the driving member 8 is restored to the initial state (the state shown in
In particular, in the switch device 1 according to this embodiment, the cam bodies 10 may be arranged between the contacts 73 of the movable contacts 7, and the first contacts (the first terminals 5) and the second contacts (the second terminals 6), and when the engagement pieces 102 are pressed by the driving member 8, the contacts 73 of the movable contacts 7 may be rotated in a direction away from the first contacts and the second contacts. Accordingly, when the operating body 9 is restored to the initial position and the engagement pieces 102 are pressed by the driving member 8, the contacts 73 of the movable contacts 7 are pressed in the direction away from the first contacts and the second contacts. Even if the contacts are welded to each other, the contacts can be effectively separated from each other.
When the switch device 1 is attached, the connection portions 512 of the cap pins 51 of the pair of first terminals 5 may be positioned to extend along an extending direction of the first groove B2, and the pair of cap pins 51 (the connection portions 512) may be inserted along the first groove B2. When the cap pin 51 at the lower side reaches a lower end portion of the first groove B2, the switch device 1 may be rotated along the second groove B3, and the connection portions 512 of the cap pins 51 are connected with the connected terminals. In the switch device 1, the second pressed portion 94 (the first pressed portion 93) of the operating body 9 may come into contact with the attachment surface of the socket B1 by the insertion operation on the first groove B2. Accordingly, the operating body 9 may be tilted and pushed into the outer case 2 (the housing portion 26). In this case, the operating body 9 may be guided to the lower side (to a deep side of the housing portion 26) by the inner wall surfaces 26a and 26b of the housing portion 26.
As shown in
In the switch device 1 according to this embodiment, since the operating body 9 includes the first pressed portion 93 that receives a pressing operation from one side and the second pressed portion 94 that receives a pressing operation from the other side, the one side and the other side being opposite to each other with respect to the protruding directions of the first terminals 5 (the cap pins 51), the operating body 9 can be tilted and pushed into the housing portion 26 in accordance with the pressing operation on the first or second pressed portion 93 or 94 with a simple configuration. In particular, in the switch device 1 according to this embodiment, since the operating body 9 is movable along the plane containing the protruding directions of both the pair of first terminals 5 (the cap pins 51), the straight-tube LED lamp L can be easily attached to the second-type fluorescent-lamp fixture.
By the rotation of the driving member 8, the driving portion 81 may move upward while the driving portion 81 may push and expand the bases 71 (the protrusions) of the movable contacts 7. In this case, the movable contacts 7 may rotate around the shafts 1012 of the cam bodies 10 held by the movable contacts 7, as the rotation axes. When the bases 71 move from the upper surface to the side surfaces of the driving portion 81, the first movable contacts 731 and the second movable contacts 732 may come into contact with the first contacts and the second contacts (a state shown in
When the operating body 9 moves to the state shown in
In contrast, when the switch device 1 is removed from the second-type fluorescent-lamp fixture B, the pressing operation on the operating body 9 may be released. The pressed portion 822 of the lever 82 of the driving member 8 may be pushed upward by the urging force of the torsion spring 12, and the driving member 8 may rotate around the shafts 821 as the rotation axis. By the rotation of the driving member 8, the driving portion 81 may move downward to a position near the insulating cover 4 (the state shown in
Even if the switch device 1 is removed from the second-type fluorescent-lamp fixture B, when the driving member 8 is restored to the initial state (the state shown in
In the switch device 1 according to this embodiment, the operating body 9 is tilted by the pressing operation into the housing (the outer case 2) and the pressing operation from the one side or the other side that are opposite to each other with respect to the protruding directions of the first terminals 5 (the cap pins 51). Hence, at least part of the operating body 9 is housed in the housing, and the first terminals 5 may be brought into conduction with the second terminals 6. Accordingly, even when the switch device 1 is attached to a fluorescent-lamp fixture of any of a type configured such that a terminal at one end of a straight-tube fluorescent lamp is inserted into one socket and then a terminal at the other end is inserted into the other socket and a type configured such that terminals at both ends of a straight-tube fluorescent lamp are simultaneously attached to sockets, the operating body 9 can be housed in the housing portion 26 and the first terminals 5 can be brought into conduction with the second terminals 6. The switch device 1 can be attached to any type of the fluorescent-lamp fixture.
In particular, in the switch device 1 according to this embodiment, the operating body 9 may be tilted by the pressing operation from both the one side and the other side that are opposite to each other with respect to the protruding directions of the first terminals 5, limitation for an attachment direction to a fluorescent-lamp fixture can be eliminated. Attachment work of a straight-tube LED lamp to a fluorescent-lamp fixture can be simplified.
As shown in
The components of the switch device 100 may have substantially equivalent functions to the functions of the components included in the switch device 1 according to the above-described embodiment. However, since the switch device 100 does not include the cam bodies 10, the structures of the inner case 30 and the insulating cover 40 that rotatably support the cam bodies 10, and the structure of the movable contacts 70 that hold the cam bodies 10 differ from the structures of the inner case 3, the insulating cover 4, and the movable contacts 7 according to the above-described embodiment. Also, since the second movable contacts 732 are not divided, the structure of the movable contacts 70 differs from the structure of the movable contacts 7 according to the above-described embodiment.
For example, the inner case 30 differs from the inner case 3 in that the support portions 322a to 322d are not provided at inner walls of a housing portion 321 formed at a cylindrical portion 32. Also, the inner case 30 differs from the inner case 3 in that a bottom surface is provided at the housing portion 321. The insulating cover 40 differs from the insulating cover 4 in that the insertion portion 42 or the support pieces 421a and 421b are not provided.
The movable contacts 70 differ from the movable contacts 7 in that the holders 72 are not provided at the lower end of the bases 71. The movable contacts 70 include fixing portions 74 at lower ends of the bases 71. The fixing portions 74 are inserted (press-fitted) to slits formed at bottom surfaces of the housing portion 321 of the inner case 30. Also, the movable contacts 70 differ from the movable contacts 7 in that the electricity-application contacts 732a or the auxiliary contacts 732b are not provided at the second movable contacts 732.
When the operating body 90 is in the non-operation state, the driving member 80 may receive an urging force of the torsion spring 120, one end of the driving portion 81 arranged at the rear side may be arranged near the insulating cover 40, and the other end of the driving portion 81 near the pressed portion 822 may be arranged at the front side extends upward. In this state, the driving portion 81 may be arranged below the arc-like bases 71 of the movable contacts 70, and is not in contact with the bases 71.
In this case, the movable contacts 70 may be arranged at initial positions and may be arranged in parallel with rear terminals 62 of the second terminals 60. First movable contacts 731 and the second movable contacts 732 that form the contacts 73 may be separated from first contacts of the first terminals 50 and second contacts of the second terminals 60.
By the rotation of the driving member 80, the driving portion 81 may move upward while the driving portion 81 may push and expand the bases 71 of the movable contacts 70. In this case, the bases 71 and the contacts 73 of the movable contacts 70 may move outward while proximal ends of the movable contacts 70 fixed to the inner case 30 serve as supporting points. When the bases 71 move to the side surfaces of the driving portion 81, the first movable contacts 731 and the second movable contacts 732 of the movable contacts 70 come into contact with the first contacts and the second contacts (a state shown in
In contrast, when the switch device 100 is removed from the first-type fluorescent-lamp fixture A, the pressing operation on the operating body 90 may be released. The pressed portion 822 of the lever 82 of the driving member 80 may be pushed upward by the urging force of the torsion spring 120, and the driving member 80 may rotate around the shafts 821 as the rotation axis. By the rotation of the driving member 80, the driving portion 81 may move downward to a position near the insulating cover 40 (a state shown in
By the rotation of the driving member 80, the driving portion 81 may move upward while the driving portion 81 may push and expand the bases 71 of the movable contacts 70. In this case, the bases 71 and the contacts 73 of the movable contacts 70 may move outward while the proximal ends of the movable contacts 70 fixed to the inner case 30 may serve as the supporting points. When the bases 71 move to the side surfaces of the driving portion 81, the first movable contacts 731 and the second movable contacts 732 of the movable contacts 70 may come into contact with the first contacts and the second contacts (a state shown in
In contrast, when the switch device 100 is removed from the second-type fluorescent-lamp fixture B, the pressing operation on the operating body 90 may be released. The pressed portion 822 of the lever 82 of the driving member 80 may be pushed upward by the urging force of the torsion spring 120, and the driving member 80 may rotate around the shafts 821 as the rotation axis. By the rotation of the driving member 80, the driving portion 81 may move downward to a position near the insulating cover 40 (the state shown in
In the switch device 100, not only the pressing operation is performed to the inside of the housing (the outer case 20), but also the operating body 90 is tilted by the pressing operation from the one side or the other side that are opposite to each other with respect to the protruding directions of the first terminals 50. Hence, at least part of the operating body 90 may be housed in the housing, and the first terminals 50 may be brought into conduction with the second terminals 60. Accordingly, even when the switch device 100 is attached to a fluorescent-lamp fixture of any of a type configured such that a terminal at one end of a straight-tube fluorescent lamp is inserted into one socket and then a terminal at the other end is inserted into the other socket and a type configured such that terminals at both ends of a straight-tube fluorescent lamp are simultaneously attached to sockets, the operating body 90 can be housed in the housing portion 26 and the first terminals 50 can be brought into conduction with the second terminals 60. The switch device 1 can be attached to any type of the fluorescent-lamp fixture.
A switch device 200 according to an exemplary embodiment differs from the switch device 1 according to the above-described embodiment mainly in configurations of second terminals 240, a driving member 250, and a movable contact unit 260. The configuration of the switch device 200 is described mainly for points different from the first embodiment. In the switch device 200, like reference signs refer like components having functions common to those of the switch device 1, and the description thereof is omitted
As shown in
The outer case 210 may be configured substantially similarly to the outer case 2 in the switch device 1, particularly for an appearance and a housing portion 26 (not shown in
A wall surface portion that defines the housing portion 211 may have rectangular notches 211a, 211b, 211c, 211d, and 211e. Upper end portions of strip-like terminals 233 of contacts 231 (231a, 231b) of the first terminals 230 (as described below, for example) may be inserted into the pair of notches 211a and 211b. A groove 212 may be provided outside the housing portion 211 at a position facing the notch 211c. The groove 212 may have a predetermined depth from the lower surface of the outer case 210 to the upper side.
Also, a groove 213 may be provided outside the housing portion 211 at a position facing the notch 211d. The groove 213 may have a predetermined depth from the lower surface of the outer case 210 to the upper side. Distal end portions 241 of the second terminals 240 (as described below, for example) may be inserted into the grooves 212 and 213. An upper end portion at the rear side of a plate portion 253 of the driving member 250 (as described below, for example) may be inserted into the notch 211e.
A substantially columnar pin 214 may be provided in the housing portion 211. The pin 214 may extend from the lower surface of the outer case 210 that forms a ceiling surface of the housing portion 211, to the lower side by a predetermined length. The pin 214 may be inserted into an opening 251c and an insertion hole 251h of the driving member 250 (as described below, for example), and may be inserted into an upper portion of a coil spring 280 (as described below, for example).
A groove 215 may be provided at an inner wall surface of a cylindrical outer peripheral surface of the outer case 210 at a position in a front portion of the switch device 200. The groove 215 may extend in the up-down direction. Also, a pair of recesses 216 and 217 may be provided at lateral sides of through holes 21a and 21b. The recesses 216 and 217 may extend along the inner wall surface of the cylindrical outer peripheral surface of the outer case 210. The pair of recesses 216 and 217 may be defined by side walls formed at the lower surface of the outer case 210 by providing recesses 24a and 24b at a surface of the cylindrical outer peripheral surface, and by the inner wall surface of the cylindrical outer peripheral surface.
The inner case 220 may have a substantially circular shape in top view. The inner case 220 may have an outer diameter corresponding to a circumference shape of the outer case 210. A pair of walls 221 (221a, 221b) extending in the up-down direction may be provided at the center of the inner case 220. The walls 221a and 221b may be arranged side-by-side at a constant distance provided therebetween in the left-right direction of the switch device 200. A box-like portion 222 having a substantially rectangular-parallelepiped shape may be provided at a portion of the inner case 220 at the rear side with respect to the walls 221a and 221b. A disk-like portion 223 may be provided at a front portion of the inner case 220. The disk-like portion 223 having a substantially semicircular shape may extend from lower portions of the walls 221.
A flat surface 221c may be provided at an upper surface of the wall 221a. The flat surface 221c may have a substantially sector-like shape, and may have a protrusion 221e configured such that part of an outer periphery of the arc-like shape protrudes outward. Similarly, a flat surface 221d having a protrusion 221f may be provided at an upper surface of the wall 221b. The flat surface 221d may have a substantially sector-like shape. The protrusion 221f may be configured such that part of an outer periphery of the arc-like shape protrudes outward. When the inner case 220 is assembled in the outer case 210, the protrusions 221e and 221f can be engaged with the recesses 216 and 217 provided at the lower surface of the outer case 210. Also, insertion holes 221g and 221h may be formed near the centers of the flat surfaces 221c and 221d. Fixing screws 11 may be inserted into the insertion holes 221g and 221h.
A housing portion 222a having a substantially rectangular shape in top view may be provided in the box-like portion 222 (see, e.g.,
The disk-like portion 223 may include a pair of flat surfaces 223a and 223b, and a flat surface 223c positioned between the flat surfaces 223a and 223b. Upper surfaces of the flat surfaces 223a and 223b may be located in the same plane, and an upper surface of the flat surface 223c may be arranged at a position lower than that plane. Each of the pair of flat surfaces 223a and 223b may have a substantially sector-like shape. The flat surfaces 223a and 223b may have a pair of through holes 223d and 223e at predetermined positions. The through holes 223d and 223e may be used when the switch device 200 is fixed to a lamp body by fixing members such as screws (not shown). A pin 224 may be provided at the flat surface 223c at a position near the boundary between the flat surface 223c and the box-like portion 222, at equivalent distances from the pair of walls 221a and 221b.
The pin 224 may extend from the upper surface of the flat surface 223c to the upper side by a predetermined length. The pin 224 may support a lower end portion of the coil spring 280 (as described below, for example) and may restrict movement of the coil spring 280. A circular recess 224a may be formed around the pin 224. The recess 224a may have an outer diameter slightly larger than an outer diameter of the pin 224. Hence, a bottom wall may be provided around the pin 224 in the recess 224a. The lower end portion of the coil spring 280 (as described below, for example) may come into contact with the bottom wall.
Also, prisms 223f and 223g may be provided near the boundary between the flat surface 223a and the flat surface 223c, and near the boundary between the flat surface 223b and the flat surface 223c. A slit 223h may be formed between the prism 223f and the flat surface 223c. Similarly, a slit 223i may be formed between the prism 223g and the flat surface 223c. Part of the second terminals 240 (as described below, for example) may be inserted into the slits 223h and 223i (see
A recess 225 may be provided at the front side of the flat surface 223c. The recess 225 may house a guided portion 254 of the driving member 250 (as described below, for example). The recess 225 may extend downward and may be in a slit form. Also, a protruding piece 226 may be provided at a front end of the disk-like portion 223. The protruding piece 226 may protrude slightly forward from a side surface at the front end. When the inner case 220 is assembled in the outer case 210, the protruding piece 226 may be arranged in the groove 215 of the outer case 210.
The first terminals 230 each may include a pair of cap pins 51 (51a, 51b) and the contacts 231 (231a, 231b). The cap pins 51 may have substantially the same configuration as that of the cap pins in the switch device 1. The contacts 231 may be formed by punching and bending conductive metal plates. The contacts 231 each may include a flat surface 232 having a substantially circular shape, and the strip-like terminal 233 formed by bending the contact 231 from the flat surface 232 perpendicularly downward. A circular opening 232a may be formed at the center of the flat surface 232.
The second terminals 240 (240a, 240b) may be formed by punching and bending conductive metal plates. The second terminals 240 (240a, 240b) each may include the distal end portion 241 and a strip-like terminal 242 that may be arranged in parallel to each other, and a coupling portion 243 that may couple the distal end portion 241 with the strip-like terminal 242. The distal end portion 241 and the strip-like terminal 242 may extend in the up-down direction of the switch device 200. The coupling portion 243 may be arranged orthogonally to the distal end portion 241 and the strip-like terminal 242. The distal end portion 241 may continuously extend from one end portion of the coupling portion 243, and more particularly from an upper surface of an outer portion of the coupling portion 243. The strip-like terminal 242 may continuously extend from the other end portion of the coupling portion 243, and more particularly from a lower surface of an inner portion of the coupling portion 243. Protruding pieces 242a may be formed near the centers in the up-down direction of the strip-like terminals 242. Each of the protruding pieces 242a may protrude in a step form in the same plane as the plane of the strip-like terminal 242.
When the inner case 220 with such second terminals 240 fixed is assembled in the outer case 210, upper portions of the strip-like terminals 242 of the second terminals 240 may be inserted into the pair of notches 211c and 211d formed at the outer case 210. The second terminals 240 may be inserted to positions at which the protruding pieces 242a come into contact with the lower surface of the wall surface portion of the housing portion 211. When the second terminals 240 are inserted to the positions at which the protruding pieces 242a come into contact with the lower surface of the wall surface portion of the housing portion 211, upper surfaces of the coupling portions 243 may come into contact with upper ends of the pair of notches 211c and 211d and the distal end portions 241 are inserted into the grooves 212 and 213.
In the switch device 200 according to this embodiment, the strip-like terminals 233 of the first terminals 230 may form first contacts and the strip-like terminals 242 of the second terminals 240 form second contacts. The first and second contacts may form fixed contacts. Part of the movable contact unit 260 (in particular, contacts 265b, 265c, 266b, and 266c) may come into contact with and may be separated from the fixed contacts.
The driving member 250 may include a contact holder 251 having a substantially rectangular-parallelepiped shape, the guided portion 252 extending downward from a rear end portion of the contact holder 251, the plate portion 253 protruding forward from a center portion of a front surface of the contact holder 251, and the guided portion 254 extending downward from a lower surface of the plate portion 253. The guided portions 252 and 254 may have substantially rectangular-parallelepiped shapes. The guided portion 252 may have the same width as a width of the driving member 250. The guided portion 254 may have the same width as a width of the plate portion 253.
A pair of openings 251a and 251b may be formed at side surfaces of the contact holder 251. Also, the opening 251c may be formed at the upper surface of the contact holder 251. The openings 251a, 251b, and 251c may have rectangular shapes, and may extend from positions near a front end of the contact holder 251 to predetermined positions at the rear side. A portion of the contact holder 251 with the openings 251a to 251c may have a hollow structure.
A pair of pressed pieces 251d and 251e (the pressed piece 251e is not shown in
The insertion hole 251h may be formed at a lower surface portion of the contact holder 251. The pin 214 of the outer case 210 may be inserted into the insertion hole 251h. A circular recess (not shown) may be formed around the insertion hole 251h at the lower side of the lower surface portion of the contact holder 251. The recess may have an outer diameter slightly larger than an outer diameter of the insertion hole 251h. Hence, a bottom wall portion may be provided around the insertion hole 251h in the recess. The upper end portion of the coil spring 280 (as described below, for example) may come into contact with the bottom wall portion.
The plate portion 253 may be provided at a front surface of the contact holder 251 such that a plate surface faces a side of the switch device 200. The guided portion 254 may extend from a substantially center portion in the front-rear direction of a lower surface of the plate portion 253. Also, a pressed portion 253a may be provided at a substantially center portion in the front-rear direction of an upper surface of the plate portion 253. The pressed portion 253a may protrude slightly upward. The pressed portion 253a may receive a pressing force from the operating body 270. The surface of the pressed portion 253a may have a substantially spherical shape. As described above, since the surface of the pressed portion 253a is spherical, the driving member 250 can be moved up and down flexibly in accordance with pressing or tilting of the operating body 270.
The movable contact unit 260 may include a pair of elastic members 261 and 262, a pair of insulating members 263 and 264, and a pair of contact members 265 and 266. The elastic members 261 and 262 may use, for example, coil springs. The insulating members 263 and 264 may be molded with, for example, an insulating resin material. The insulating member 263 (264) may include a base 263a (264a), and two protrusions 263b and 263c (264b, 264c) protruding from a surface of the base 263a (264a).
The base 263a (264a) may have a substantially rectangular shape. The two protrusions 263b and 263c (264b, 264c) each may have a substantially rectangular-parallelepiped shape and may be arranged at a predetermined interval. The two protrusions 263b and 263c (264b, 264c) may be arranged slightly inside of both ends in the front-rear direction of the base 263a (264a). Also, protruding pieces 263d and 263e (264d, 264e) may be formed at a rear end of the protrusion 263b (264b) arranged at the rear side of the base 263a (264a) and a front end of the protrusion 263c (264c) arranged at the front side of the base 263a (264a). The protruding pieces 263d and 263e (264d, 264e) may protrude slightly in protruding directions of the protrusions 263b and 263c (264b, 264c).
A boss 263f (264f) may be provided at the base 263a (264a) in a region interposed between the two protrusions 263b and 263c (264b, 264c). The boss 263f may protrude outward. The boss 263f (264f) may be used for attaching the contact member 265 (266) to the insulating member 263 (264). The boss 263f (264f) may be inserted into a through hole 265a (266a) of the contact member 265 (266) (as described below, for example), and a distal end portion protruding from the through hole 265a (266a) may be swaged. In
The contact members 265 and 266 may form movable contacts, and may be formed by punching and bending conductive metal plates. The contact member 265 (266) may have a step shape along a surface of the insulating member 263 (264). The through hole 265a (266a) may be provided at the center portion of the contact member 265 (266). The boss 263f (264f) of the insulating member 263 (264) may be inserted through the through hole 265a (266a). Also, the contacts 265b and 265c (266b, 266c) each having a semispherical shape may be provided near both ends of the contact member 265 (266).
The operating body 270 may be formed such that a cross-sectional shape of the operating body 270 in a cross-sectional plane parallel to a plane containing extending directions of both the pair of first terminals 230 (the cap pins 51) may have a smaller width at an upper portion than a width at a lower portion. For example, the operating body 270 may have a substantially triangular shape in front view. The operating body 270 may include a vertex portion 271 that may be a distal end portion arranged at an upper end, a bottom surface 272 opposite to the vertex portion 271, a first pressed portion 273 provided at one outline portion with respect to the vertex portion 271, and a second pressed portion 274 provided at the other outline portion different from the first pressed portion 273 with respect to the vertex portion 271. The vertex portion 271, the first pressed portion 273, and the second pressed portion 274 may form an operating portion of the operating body 270.
A recess 272a may be provided at the center of the bottom surface 272. The recess 272a may be provided for housing the pressed portion 253a of the driving member 250. The recess 272a may be a contact portion that may come into contact with the driving member 250. The pressed portion 253a of the driving member 250 may function as a support portion that may support the contact portion. Also, both end portions of the bottom surface 272 may be formed in protruding shapes such that widths of the protruding shapes are decreased toward the lower side. A pair of protrusions 272b and 272c may be provided at front surfaces of lower end portions of the operating body 270. The protrusions 272b and 272c each may have a substantially triangular shape corresponding to the shape of the bottom surface 272. Three vertex portions may have arc-like shapes.
The coil spring 280 may function as an elastic member that may restore the operating body 270 of the switch device 200 to an initial state. The pin 214 of the outer case 210 may be inserted into an upper portion of the coil spring 280. The pin 224 of the inner case 220 may be inserted into a lower portion of the coil spring 280. The coil spring 280 may be expanded and contracted while the coil spring 280 is supported by the pins 214 and 224.
The appearance when the switch device 200 is assembled is substantially the same as the appearance of the switch device 1 according to the exemplary embodiment shown in
As shown in
The coil spring 280 may be arranged below the contact holder 251. A lower end portion of the coil spring 280 may be housed in a recess 224a such that the pin 224 is inserted into the coil spring 280 from the lower end portion. Also, an upper end portion of the coil spring 280 may be housed in the recess provided at the lower surface of the contact holder 251 such that the pin 214 of the outer case 210 is inserted into the coil spring 280 from the upper end portion (see, e.g.,
The flat surfaces 232 of the contacts 231 (231a, 231b) of the first terminals 230 may be arranged on the flat surfaces 221c and 221d of the walls 221a and 221b. In this case, the flat surfaces 232 may be arranged such that the openings 232a correspond to the insertion holes 221g and 221h and the strip-like terminals 233 extend along the inner wall surface that defines the box-like portion 222. Lower end portions of the strip-like terminals 233 may be inserted into the slits 222b and 222c.
The fixing screws 11 may be inserted into the insertion holes 221g and 221h from the lower side of the inner case 220, and may penetrate through the openings 232a of the contacts 231. The cap pins 51 of the first terminals 230 may be fixed to the fixing screws 11 protruding from the openings 232a. When surfaces of the contacts 231 are fixed, lower surfaces of the fixing portions 513 of the cap pins 51 may be in contact with the flat surfaces 232 of the contacts 231. Accordingly, the cap pins 51 and the contacts 231 may be brought into conduction.
The second terminals 240 may be arranged such that the strip-like terminals 242 extend along the prisms 223f and 223g and the lower ends of the strip-like terminals 242 are inserted into the slits 223h and 223i. At this time, the protruding pieces 242a of the strip-like terminals 242 may be exposed from upper opening edges of the slits 223h and 223i. Also, portions of the wall surface portion that defines the housing portion 211 of the outer case 210 may be arranged between the distal end portion 241 and the contact 265c, and between the distal end portion 241 and the contact 266c. Accordingly, in the initial state of the switch device 200, the second terminals 240 and the contacts 265c and 266c may be reliably brought into an insulating state.
When the operating body 270 is in the non-operation state, the driving member 250 may receive the urging force of the coil spring 280 and may be arranged such that part of the guided portion 252 is housed in the housing portion 222a and part of the guided portion 254 is housed in the recess 225. The insulating member 263 and the contact member 265, and the insulating member 264 and the contact member 266 of the movable contact unit 260 may receive the urging forces of the elastic members 261 and 262. Accordingly, the contacts 265b and 265c may protrude from the opening 251a and may be arranged outside the contact holder 251. Also, the contacts 266b and 266c may protrude from the opening 251b and may be arranged outside the contact holder 251.
The contact 265b of the movable contact unit 260 may be arranged to face the contact 231a of the first terminal 230. Also, the contact 266b may be arranged to face the contact 231b. Since the contacts 231a and 231b of the first terminals 230 are located below the contacts 265b and 265c, the contact 231a may be separated from the contact 265b, and the contact 231b may be separated from the contact 266b. The contact 265c of the movable contact unit 260 may be arranged to face the distal end portion 241 of the second terminal 240a. Also, the contact 266c may be arranged to face the distal end portion 241 of the second terminal 240b. Since portions of the wall surface portion that defines the housing portion 211 of the outer case 210 are arranged between the distal end portion 241 and the contact 265c and between the distal end portion 241 and the contact 266c, the second terminal 240a may be separated from the contact 265c, and the second terminal 240b is separated from the contact 266c. Accordingly, when the switch device 200 is in the initial state, the first terminal 230 and the contacts 265b and 266b, as well as the second terminals 240 and the contacts 265c and 266c may be brought into an insulating state.
By the movement of the driving member 250, the movable contact unit 260 attached to the contact holder 251 also may be moved downward. When the contacts 265b, 266b, 265c, and 266c respectively reach the strip-like terminals 233 (the first contacts) of the contacts 231a and 231b and the strip-like terminals 242 (the second contacts) of the second terminals 240a and 240b, the first contacts may come into contact with the second contacts. By further movement of the driving member 250, the contacts 265b, 266b, 265c, and 266c may move downward while holding the contact state between the first contacts and the second contacts. At this time, the contacts 265b, 266b, 265c, and 266c may be pushed inward by the strip-like terminals 233 and 242. Hence, the insulating members 263 and 264 and the contact members 265 and 266 of the movable contact unit 260 may be pushed against the urging forces of the elastic members 261 and 262, and move slightly inward. With this configuration, the contacts 265b, 266b, 265c, and 266c respectively reliably come into contact with the first contacts and the second contacts (a state shown in
In contrast, when the switch device 200 is removed from the first-type fluorescent-lamp fixture A, the pressing operation on the operating body 270 may be released. Hence, the contact holder 251 of the driving member 250 may be pushed upward by the urging force of the coil spring 280, and the guided portions 252 and 254 move upward while being guided by the inner wall surfaces of the housing portion 222a and the recess 225. By the movement of the driving member 250, the contacts 265b, 266b, 265c, and 266c of the movable contact unit 260 may move upward to positions at which the contacts 265b, 266b, 265c, and 266c may not contact the first contact or the second contact (a state shown in
By the movement of the driving member 250, the movable contact unit 260 attached to the contact holder 251 also may be moved downward. When the contacts 265b, 266b, 265c, and 266c respectively reach the strip-like terminals 233 (the first contacts) of the contacts 231a and 231b and the strip-like contacts 242 (the second contacts) of the second terminals 240a and 240b, the first contacts may come into contact with the second contacts. By further movement of the driving member 250, the contacts 265b, 266b, 265c, and 266c may move downward while holding the contact state between the first contacts and the second contacts. At this time, the contacts 265b, 266b, 265c, and 266c may be pushed inward by the strip-like terminals 233 and 242. Hence, the insulating members 263 and 264 and the contact members 265 and 266 of the movable contact unit 260 may be pushed against the urging forces of the elastic members 261 and 262, and move slightly inward. With this configuration, the contacts 265b, 266b, 265c, and 266c respectively reliably may come into contact with the first contacts and the second contacts (a state shown in
When the operating body 270 moves to the state shown in
In contrast, when the switch device 200 is removed from the second-type fluorescent-lamp fixture B, the pressing operation on the operating body 270 may be released. Hence, the contact holder 251 of the driving member 250 may be pushed upward by the urging force of the coil spring 280, and the guided portions 252 and 254 may move upward while being guided by the inner wall surfaces of the housing portion 222a and the recess 225. By the movement of the driving member 250, the contacts 265b, 266b, 265c, and 266c of the movable contact unit 260 may move upward to positions at which the contacts 265b, 266b, 265c, and 266c do not contact the first contacts or the second contacts (the state shown in
In the switch device 200 according to this embodiment, not only the pressing operation may be performed to the inside of the housing (the outer case 210), but also the operating body 270 may be tilted by the pressing operation from the one side or the other side that are opposite to each other with respect to the protruding directions of the first terminals 230 (the cap pins 51). Hence, at least part of the operating body 270 may be housed in the housing, and the first terminals 230 may be brought into conduction with the second terminals 240. Accordingly, even when the switch device 200 is attached to a fluorescent-lamp fixture of any of a type configured such that a terminal at one end of a straight-tube fluorescent lamp may be inserted into one socket and then a terminal at the other end may be inserted into the other socket and a type configured such that terminals at both ends of a straight-tube fluorescent lamp may be simultaneously attached to sockets, the operating body 270 can be housed in the housing portion 26 and the first terminals 230 can be brought into conduction with the second terminals 240. The switch device 1 can be attached to any type of the fluorescent-lamp fixture.
The present disclosure is not limited to the above-described embodiments, and may be implemented by modifying the embodiments in various ways. The sizes and shapes of the components shown in the attached drawings are not limited to those in the above-described embodiments. The sizes and shapes of the components may be properly changed within a range that attains advantages of the present invention. Embodiments of the present disclosure may be implemented by modifying other configurations within the scope of the present disclosure.
For example, in any of the above-described embodiments, the operating body 9 (270) may be tilted by the pressing operation from both sides of opposite directions with respect to the protruding directions of the first terminals 5 (230) (the cap pins 51). However, the motion of the operating body 9 (270) is not limited thereto, and may be properly changed. For example, the operating body 9 (270) may be tilted by a pressing operation from the one side of the opposite directions with respect to the protruding directions of the first terminals 5 (230). Even with this modification, an advantage similar to that of the embodiments can be attained.
Also, in any of the above-described embodiments, the pair of first terminals 5 (230) is provided, and the pair of second terminals 6 (240) and the pair of movable contacts 7 (the contact members 265, 266) are provided to correspond to the pair of first terminals 5 (230). The above-described embodiments can be used for a straight-tube LED lamp with a configuration in which power is fed from the one switch device 1 (200) provided at an end of a lamp body. However, the number of the second terminals 6 (240) and the number of the movable contacts 7 (the contact members 265, 266) included in the switch device 1 (200) are not limited to the numbers in any of the above-described embodiments, and may be properly changed. For example, when the embodiments are applied to the straight-tube LED lamp having a power-feed structure using switch devices 1 (200) provided at each of both ends of a lamp body, the single second terminal 6 (240) and the single movable contact 7 (the contact member 265, 266) may be provided at each of both ends. In this case, the conduction state between one of the pair of first terminals 5 (230) and the single second terminal 6 (240) may be changed through the single movable contact 7 (the contact member 265). Hence, the conduction state of the other of the pair of first terminals 5 (230) with respect to the second terminal is not changed. Alternatively, the pair of first terminals may be conducting with each other in the housing of the switch device 1, and the conduction state between both the first terminals and the single second terminal may be changed.
Further, for the operating body 9 (270) of any of the above-described embodiments, as shown in
Further, for the operating body 9 (270) of any of the above-described embodiments, the recess 921 (272a) is provided at the center of the bottom surface 92 (272). However, the shape of the operating body 9 (270) is not limited thereto, and may be properly changed. For example, as shown in
Further, for the operating body 9 (270) of any of the above-described embodiments, the two protrusions 922a and 922b (the protrusions 923a and 923b, or the protrusions 272b and 272c) are provided. However, the number of protrusions provided at the operating body 9 (270) is not limited thereto, and may be properly changed. For example, a continuously extending single protrusion may be provided.
Further, in any of the above-described embodiments, the operating body 9 (270) has a plate-like shape. However, the shape of the operating body 9 (270) is not limited thereto, and may be properly changed. For example, the shape of the operating body 9 (270) may be a cone, or a shape having a plurality of steps.
Further, in any of the above-described embodiments, the operating body 9 (270) is arranged in the plane parallel to the plane containing the protruding directions of the pair of first terminals 5 (230), the plane which is arranged at the front side of the plane containing the first terminals 5 (230). However, the position of the operating body 9 (270) is not limited thereto, and may be properly changed. For example, the operating body 9 (270) may be arranged in the same plane as the plane containing the protruding directions of the pair of first terminals 5 (230).
Further, in any of the above-described embodiments, the housing portion 26 is provided at the outer case 2 (210). However, the member provided with the housing portion 26 is not limited to the outer case 2 (210), and may be properly changed. For example, the housing portion 26 may be provided at a member different from the outer case 2 (210). Also, the housing of the switch device 1 (200) may be integrally formed with at least part of the housing of the LED lamp body.
Further, in any of the above-described embodiments, the switch devices 1 (200) are provided at both ends of the straight-tube LED lamp L. However, the positions at which the switch devices 1 (200) are provided at the straight-tube LED lamp L are not limited thereto, and may be properly changed. For example, when the switch device is attached to the fluorescent-lamp fixture with the structure in which power is fed only from one end of the straight-tube LED lamp L, the switch device 1 (200) may be provided only at the one end of the straight-tube LED lamp L. When the switch device 1 (200) is provided only at the one end of the straight-tube LED lamp L, the other end of the straight-tube LED lamp L may be provided with a dummy terminal or the like and may be attached to a corresponding socket.
Further, in the first embodiment, the switch device 1 includes the cam bodies 10 and the movable contacts 7 as separate members, and the cam bodies 10 are held by the movable contacts 7. However, the configurations of the cam bodies 10 and the movable contacts 7 included in the switch device 1 are not limited thereto, and may be properly modified. For example, the cam bodies 10 may be integrally molded with the movable contacts 7 by insert molding.
Accordingly, the embodiments of the present inventions are not to be limited in scope by the specific embodiments described herein. Further, although some of the embodiments of the present disclosure have been described herein in the context of a particular implementation in a particular environment for a particular purpose, those of ordinary skill in the art should recognize that its usefulness is not limited thereto and that the embodiments of the present inventions can be beneficially implemented in any number of environments for any number of purposes. Accordingly, the claims set forth below should be construed in view of the full breadth and spirit of the embodiments of the present inventions as disclosed herein. While the foregoing description includes many details and specificities, it is to be understood that these have been included for purposes of explanation only, and are not to be interpreted as limitations of the invention. Many modifications to the embodiments described above can be made without departing from the spirit and scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2010-282307 | Dec 2010 | JP | national |
| 2010-282308 | Dec 2010 | JP | national |
| 2011-206305 | Sep 2011 | JP | national |
