Patent Application
20050082155
1. Field of the Invention
The present invention relates to a switch device suitable for use in, for example, a driving switch of a vehicle-mounted power window apparatus, which is capable of selectively operating two sets of switch elements by rockably operating an operating knob.
2. Description of the Related Art
Conventionally, as a driving switch of a vehicle-mounted power switch, a driving switch is proposed in which two sets of slide-type switch elements are juxtaposed to each other and an operating rod of an operating knob is rockably operated to turn on the respective switch elements (for example, see Japanese Examined Patent Application Publication No. 5-80770).
The above-mentioned conventional switch unit 1 is assembled into a housing 6. An operating knob 7 is disposed in a mounting recess 6a of the housing 6. The operating knob 7 can swing about a spindle 8, and operating rod 9 moves (tilts) in the direction of the arrow “A” or “B” along with the swinging of the operating rod 7. Also, the tip of the operating rod 9 is inserted between the driving shafts 3 and 4 of the two sets of switch elements. Thus, when an operator pushes in the operating knob 7 to move the operating rod 9 in the direction of the arrow “A”, the operating rod 9 causes the driving shaft 3 to be pushed in and slid in the left direction in the drawing against the biasing force of the coil spring. As a result, the movable contact pieces, which integrally slide with the driving shaft 3, are brought into contact with or separated from the corresponding fixed contact pieces, such that one switch element is switched from its OFF state to its ON state. In this state, when a pushing force applied to the operating knob 7 is removed, the coil spring, which has been compressed by the sliding of the driving shaft 3, biases the slider to cause the driving shaft 3 to be slid in the opposite direction. Therefore, the switch element is automatically returned to its OFF state in
In the above-mentioned conventional example, the driving shafts 3 and 4 slides in a straight line. However, the operating rod 9 that pushes in the driving shafts 3 and 4 are members swinging about the spindle 8. Thus, the driving shafts 3 and 4 are pushed in a direction upwardly inclined with respect to the sliding direction. In addition, during operation, the driving shafts 3 and 4 are pressed against the peripheral walls of the elongated holes 2a and 2b, or the slider is pressed against the inner wall of the case 2 while being inclined. This may increase sliding resistance partially and undesirably and result in the sense of irregularity or saccade. Therefore, a problem occurs in that a good sense of operational touch is rarely obtained. Meanwhile, if the operating rod 9 is made long to arrange the spindle 8 away from the driving shafts 3 and 4, the driving shafts 3 and 4 can be pushed substantially in the sliding direction. However, in that case, the operating knob 7 may significantly protrude upward from the mounting groove 6a of the housing, which is not preferable.
The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a switch device which makes it possible to give an operator a good sense of operational touch even if the switch device is combined with an operating knob that is rockably operated or slidably operated.
To achieve the above-mentioned object, a switch device of the present invention comprises a case having a bottom wall and an upper opening, two sets of switch elements assembled to the case, a spring member for giving a returning force to the two sets of switch elements, and a cover member for covering the upper opening of the case. The switch elements include fixed contact members exposed on an inner wall surface of the case, conductor members disposed in the case and capable of being brought into contact with or separated from the fixed contact members, and rotatable driving bodies for driving the conductor members. Pressed parts are respectively provided in the driving bodies so as to protrude above the cover member, and opposite pressing forces are respectively applied to the pressed parts of the two sets of switch elements. During operation, the driving bodies are driven to rotate via the pressed parts such that the conductor members are brought into contact with or separated from the fixed contact members, thereby allowing any of the two sets of switch elements to selectively perform opening and closing operations, and as the pressing forces are released, the driving bodies are returned to non-operating positions.
According to the switch device having the above construction, when the pressed part of any of the two sets of switch elements is driven to rotate by a rocking operation or a sliding operation of the operating knob, in the switch element concerned, the driving means is rotated to cause the conductor member to be brought into contact with the fixed contact member. Thus, the switch element can be switched. Meanwhile, in the case of the other switch element, the direction of a pressing force given to the pressed part becomes opposite. However, the switching operation of the other switch element is basically the same as that of the one switch element.
In the above-mentioned switch device, preferably, the fixed contact members of the switch elements are disposed on a bottom face of the inner wall surface, and the conductor members are rockably disposed on the bottom face of the inner wall surface and provided with inclined surfaces. The spring member is formed of a plate spring, and the spring member is attached to the case in a state pressed by the cover member. The driving bodies are allowed to be elevated and are rotatably held in the case, and sliding parts are provided to be brought into resilient contact with the conductor members by the biasing force of the plate spring member. When the driving bodies are driven to rotate via the pressed parts, the sliding parts slide on the inclined surfaces of the conductor members, the conductor members rock such that they are brought into contact with or separated from the fixed contact members, and at the same time the driving bodies moves against the biasing force of the plate spring.
According to the switch device having the above construction, when the pressed part of any of the switch elements is driven to rotate by a rocking operation or a sliding operation of the operating knob, in the switch element concerned, the driving body is rotated to cause the conductor member to slide on the corresponding inclined surface. Thus, the conductor plate can be rocked on the bottom wall of the case and can be brought into contact with and separated from the fixed contact members. In addition, the switch element can be switched from its OFF state to its ON state. Also, at the time of such switching operation, when the reaction force of the conductor plate against the driving body 17 increases or decreases, the driving body can be elevated while receiving the biasing force of the plate spring member. Therefore, it is possible to obtain a good sense of operational touch always without undesirably increasing the sliding resistance. Further, when the operating force applied to the operating knob is removed after such switching operation, the biasing force of the plate spring member causes the driving body on the inclined surface to rotate in the opposite direction and to return to its initial position on the conductor plate. Thus, the conductor plate rocks on the bottom wall in the opposite direction and returns to the OFF state automatically. Meanwhile, in the case of the other switch element, the direction of a pressing force applied to the pressed part becomes opposite. However, the operation of the other switch element is basically the same as that of the one switch element.
In the above-mentioned switch device, preferably, the driving bodies are respectively provided with driving arm parts that protrude laterally from the case. In this case, for example, a construction can be realized in which the driving arm parts are disposed above push switches juxtaposed in the vicinity of the case and the driving bodies are driven to rotate via the pressed parts, such that the driving arm parts operate to press the push switches. Therefore, even if the number of operating knobs is not increased or the shape thereof is not complicated, it is possible to easily add different operational performances by using the switch device.
The present invention relates to a switch device in which the driving body is driven to rotate such that the conductor plate is brought into contact with or separated from the fixed contact members. In case rocking operation or sliding operation of the operating knob is carried out, an angular moment that tends to flex the plate spring member is not applied to the driving body, but the driving means can be smoothly driven to rotate. As a result, a good sense of operational touch can usually be obtained.
Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.
Referring to these drawings, generally, a switch unit 11 comprises a case 12 in which sidewalls 12b and 12c and partition walls 12d are set up from a bottom wall 12a to form a pair of contact accommodation spaces S1 and S2; a fixed contact members 13a to 13c respectively disposed on the bottom wall 12a in the pair of contact accommodation spaces S1 and S2 by insert molding; a plurality of terminals 14 extending from the respective fixed contact members 13a to 13c and protruding downward from the case 12; a pair of conductor plates (conductor members) 15 and 16 rockably disposed on the bottom wall 12a in the respective contact accommodation spaces S1 and S2; driving bodies 17 and 18 disposed on the respective conductor plates 15 and 16 in a state in which the elevating movement of the driving bodies is allowed and that can rotate about shaft parts 17a and 18a; a plate spring member (spring member) 19 having a pair of pressing pieces 19a and 19b for resiliently biasing sliding parts 17b and 18b of the respective driving bodies 17 and 18 toward the bottom wall 12a; and a cover member 20, made of a metallic plate, that is attached to the case 12 to cover an upper opening 12e of the case. As illustrated in
Two sidewalls 12c and four partition walls 12d are respectively set up parallel to each other from the bottom wall 12a at the long sides of the case 12, and two sidewalls 12b are respectively set up perpendicular to the sidewalls 12c from the bottom wall 12a at the short sides of the case 12. Respective uppers ends of the two sidewalls 12c and two partition walls 12d (ends at the upper opening 12e) are formed with notched recesses 12f and 12g into which the shaft parts 17a and 18a of the respective driving bodies 17 and 18 are inserted such that they can be elevated. The two sidewalls 12b at the short sides are formed at their middle portions with notched slits 12h whose upper ends are open. Arm parts 17d and 18d of the driving bodies 17 and 18 are inserted into the slits 12h such that they can be elevated. Moreover, the opposite faces of the sidewalls 12c and partition walls 12d are respectively formed with protrusions 12i. The upper shape of the protrusions 12i is circular-arc-shaped such that the conductor plates 15 and 16 are smoothly positioned during assembling.
The fixed contact members 13a to 13c are respectively aligned in rows at the inner bottom of the contact accommodation spaces S1 and S2 of the case 12. The conductor plate 15 is disposed on one group of fixed contact members, and the conductor plate 16 is disposed on the other group of fixed contact members. The fixed contact members 13a to 13c is comprised of a first fixed contact member 13a that is normally brought into resilient contact with the conductor plate 15 or 16 as a rocking fulcrum, and second and third contact members 13b and 13c that are brought into contact with or separated from the conductor plate 15 or 16. The plurality of terminals 14, which extend from the respective fixed contact members 13a to 13c, are connected to an external circuit.
The conductor plate 15 is a metal plate and has an initial receiving part 15a that supports the driving bodies 17 in a state before the operating knob 32 is attached, a rising part 15b having an inverted ‘V’ shape in side view and formed by continued inclined surfaces at one side of the initial receiving part 15a, a flat part 15c extending toward the other side of the initial receiving part 15a, a movable contact part 15d opposite to the initial receiving part 15a from the rising part 15b. The movable contact part 15d is capable of being brought into contact with or being separated from the fixed contact member 13b in the contact accommodation space S1, and the flat part 15c is capable of being brought into contact with or separated from the fixed contact member 13c in the contact accommodation space S1. Moreover, both sides of the conductor plate 15 are formed with four projections 15e with the initial receiving part 15a interposed therebetween. These projections 15e are caused to engage with the protrusions 12i of the case 12 so that the conductor plate 15 does not deviate in its longitudinal direction during the rocking thereof. The conductor plate 16 has the same shape as the conductor plate 15, and has a rising part 16b and flat part 16c on both sides of an initial receiving part 16a. A movable contact part 16d is provided to extend in the longitudinal direction of the conductor plate 16 at one side thereof and is capable of being brought into contact with or separated from the fixed contact member 13b in the contact accommodation space S2. The flat part 16c at the other end of the conductor plate 16 in its longitudinal direction is capable of being brought into contact with or separated from the fixed contact member 13c in the contact accommodation space S2. Both lateral faces of the conductor plate 16 are also formed with four projections 16e with the initial receiving parts 16a interposed therebetween. The projections 16e is engaged with the protrusions 12i of the case 12 so that the conductor plate 16 is not deviated in its longitudinal direction during the rocking thereof.
The driving bodies 17 has the shaft part 17a as the center of rotation, the sliding part 17b that are normally into resilient contact with the conductor plate 15 by a biasing force of the pressing piece 19a of the plate spring member 19, the pressed part 17c that extends upward and protrudes above the cover member 20, and the arm part 17d that extends laterally and is inserted into one of slits 12h. A pair of opposite guide walls 17e is formed at predetermined spacing therebetween on the sliding part 17b. Similarly, the driving body 18 has the shaft part 18a serving as the center of rotation, the sliding part 18b that are normally brought into resilient contact with the conductor plate 16 by a biasing force of the pressing piece 19b of the plate spring member 19, the pressed part 18c that extends upward and protrudes above the cover member 20, and the arm part 18d that extends transversely and is inserted into the other one of slits 12h. A pair of opposite guide walls 18e is formed at predetermined spacing therebetween on the sliding part 18b. The driving bodies 17 and 18 are assembled into the case 12 in such a manner to establish point symmetry in plan view. The arm parts 17d and 18d and the pressed parts 17c and 18c are disposed in a straight line. In other words, when the driving bodies 17 and 18 are assembled into the case 12, the arm parts 17d and 18d are disposed in a narrow space between the contact accommodation spaces S1 and S2 in the case 12, such that the shaft part 17a of the driving body 17 is inserted into the mutually opposed recesses 12f, and the shaft part 18a of the driving body 18 is inserted into the mutually opposed recesses 12g.
The plate spring member 19 is obtained by press-forming one resilient metal plate in the shape as illustrated in
The cover member 20 is formed at four corners thereof with attachment pieces 20a. The attachment pieces 20a are bent and locked in the four corners of the case 12, whereby the cover member 20 is attached to the case 12 while covering the upper opening 12e. When the cover member 20 is attached to the case 12 in this way, this presses and flexes the bent pieces 19d and 19f of the cover member 19, which was previously assembled into the case 12. Therefore, spring pressure is generated in the respective pressing pieces 19a and 19b. As a result, one pressing piece 19a resiliently biases the sliding operating part 17b of the pressing means 17 toward the bottom wall 12a. This biasing force causes the sliding part 17d to be brought into resilient contact with the conductor plate 15. Thus, when the driving body 17 is rotated about the shaft part 17a, the sliding part 17b can slide on the rising part (inclined surface) 15b of the conductor plate 15 to rotatably drive the conductor plate 15. Similarly, the other pressing piece 19b resiliently biases the sliding part 18b of the driving body 18 toward the bottom wall 12a. This biasing force causes the sliding part 18b to be brought into resilient contact with the conductor plate 16. Thus, when the driving body 18 is rotated about the shaft part 18a, the sliding part 18b can slide on the rising part (inclined surface) 16b of the conductor plate 16 to rotatably drive the conductor plate 16. Further, the cover member 20 is formed with a window hole 20b for causing the pressed part 17c of the driving body 17 to be inserted therethrough and a window hole 20c for causing the pressed part 18c of the driving body 18 to be inserted therethrough.
The above-described switch unit 11 is constructed such that a first switch element and a second switch element are juxtaposed in the case 12. The first switch element has the fixed contact members 13a to 13c, the conductor plate 15, the driving body 17, the pressing piece 19a, etc., disposed in the contact accommodation space S1. The second switch element has the fixed contact members 13a to 13c, the conductor plate 16, the driving body 18, the pressing piece 19b, etc., disposed in the contact accommodation space S2. It is noted herein that a spring member for giving a restoring force to the first and second switch elements is the only common plate spring member 19.
Further, when the switch unit 11 is combined with the operating knob 32, the tip (lower end) of the operating rod 34 is inserted between the pressed parts 17c and 18c of the driving bodies 17 and 18. At this time, the operating rod 34 is brought into resilient contact with the pressed parts 17c and 18c in a state where pretension is applied (pressure-applied state) to the pressed parts so that the looseness between the operating knob 32 and the driving bodies 17 and 18 can be avoided. In other words, in such a pressure-applied state, the sliding parts 17b and 18b of the driving bodies 17 and 18 abut on the inclined surfaces of the rising parts 15b and 16b of the conductor plates 15 and 16, respectively, close to the lower ends thereof. However, in a state of the operating knob 32 being detached, the sliding parts 17b and 18b abut on the initial receiving parts 15a and 16a, respectively, of the conductor plate 15 and 16. For this reason, the pressed parts 17c and 18c is slightly inclined toward a position more approaching each other than the position illustrated in
The operation of the driving switch in which the switch unit 11 is combined with the operating knob 32, as described above, will be described below. In a standby state (the above-mentioned pressure-applied state) in which an operating force is not applied, the sliding part 17b of the driving body 17 is brought into resilient contact with the lower end of the rising part 15b of the conductor plate 15. Thus, the fixed contact members 13a and 13c in the contact accommodation space S1 are electrically conducted to each other via the conductor plate 15, and the fixed contact members 13a and 13b are kept in a mutually non-conducted state therebetween. Further, the sliding part 18b of the driving body 18 is brought into resilient contact with the lower end of the rising part 16b of the conductor plate 16. Thus, the fixed contact members 13a and 13c in the contact accommodation space S2 are electrically conducted to each other via the conductor plate 15, and the fixed contact members 13a and 13b are kept in a mutually non-conducted state therebetween.
In this state, for example, when an operating force for pushing in the right end of the operating knob 32, as illustrated in
Further, in the state of
Meanwhile, in such a standby state, the operation of the driving switch when an operating force for pushing in the left end of the operating knob 32 illustrated in
As described above, in the switch unit 11 according to the present embodiment, when the rocking operation of the operating knob 32 drives the pressed part 17c (or 18c) of the switch element to be pressed sideways, the driving body 17 (or 18) rotates. At this time, since the driving body 17 (or 18) is given only the angular moment around the shaft part 17a (or 18a) without abutting on the inclined surface of the rising part in its inclined state. Thus, a good sense of operational touch can usually be obtained. Further, along with the rotation of the driving body 17 (or 18), the conductor plate 15 (or 16) is adapted to rock on the bottom plate 12a, thereby allowing the switch element to be switched from its ON state to its OFF state. Thus, the switch element can be applied to a bipolar or double-throw driving switch, thereby securing high reliability. Moreover, at the time of the switching operation of the switch unit 11, the reaction force of the conductor plate 15 (or 16) against the driving body 17 (or 18) increases or decreases. However, the driving body 17 (or 18) can be elevated while receiving the biasing force of the plate spring member 19, and when the reaction force from the conductor plate 15 (or 16) increases, the pressing piece 19a (or 19b) can be pushed and flexed. Therefore, it is possible to obtain a good sense of operational touch always without undesirably increasing the sliding resistance.
Meanwhile, since the conductor plates 15 and 16, the driving bodies 17 and 18, the plate spring member 19 and the cover member 20 are assembled in this order onto the bottom wall 12a of the case 12 in assembling the switch unit 11, a good assembling property can be expected. Further, at the time of the assembling, the conductor plate 15 and 16 can be positioned by the protrusions 12i of the case 12, the driving bodies 17 and 18 can be positioned by the recesses 12f and 12g and slits 12h of the case 12, and the plate spring member 19 can be positioned by the sidewalls 12b of the case 12 and the guide walls 17e and 18e of the driving bodies 17 and 18. Thus, even if the automatic assembling is performed, the positional deviation and falling of those parts hardly occur. As a result, the assembling cost can be remarkably reduced.
Next, another application of the above-described switch unit 11 will be described.
Accordingly, when the operating knob 35 is slidably operated in the left direction in the drawing in the standby state (OFF state) illustrated in
A switch unit 21 illustrated in FIGS. 7 to 10 is different from the switch unit 11 in that driving arm parts 17f and 18f are respectively provided in the driving bodies 17 and 18 so as to largely protrude laterally from the case 12. The other construction of the switch unit 21 is the same as that of the switch unit 11. Further, in this embodiment, a pair of push switches 37 and 38 is juxtaposed in the vicinity of the case 12 of the switch unit 21. The push switches 37 and 38 are mounted on a circuit substrate 30. Operating portions 37a and 38a of the push switches 37 and 38 are respectively disposed below the driving arm parts 17f and 18f. Also, the driving arm part 17f, which is lowered along with the rotation of the driving body 17, pushes in the operating portion 37a, so that the push switch 37 can be switched from its OFF state to its ON state. Further, the driving arm part 18f, which is lowered along with the rotation of the driving body 18, pushes in the operating portion 38a, such that the push switch 38 can be switched from its OFF state to its ON state.
In other words, for example, when an operating force for pushing in the right end of the operating knob 32 is applied in the standby state illustrated in
Further, in the standby state illustrated in
As described above, in the present invention, a multi-functional driving switch which can perform a manual opening or closing operation by opening or closing a window by a certain amount, when the operating knob 32 is slightly pushed in and which can perform an automatic opening or closing operation by fully opening or closing a window, when the operating knob 32 is deeply pushed in, comes true, particularly, without complicating the structure and increasing the size.
Further, the internal structure of the switch unit including the fixed contacts, the conductor plates, the plate spring member, etc., is not limited to the above-described embodiments, and various modifications other than this structure can also be adopted.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2003-359499 | Oct 2003 | JP | national |
