Patent Application
20130033858
The present embodiment relates to a fluorescent lamp type light-emitting device lamp and a lighting apparatus to which the fluorescent lamp type light-emitting device lamp is applied.
In recent years, a lighting apparatus has been developed which uses an LED as a light source and is used in indoor or outdoor along with high output, high efficiency and spread of the LED. Energy saving and long life can be expected of an LED when compared to a light source such as a fluorescent lamp of the related art, and can reduce the exchange frequency of the light source or the lighting apparatus, and is advantageous for maintenance. Thus, it is desired to use the LED as the light source on behalf of the fluorescent lamp for this reason.
In the lighting apparatus using the LED, when the insulation properties of a substrate or the like, on which the LED and a circuit board are mounted, decline, there is a risk of electric shock at the time of the maintenance of the fluorescent lamp type LED lamp or the like. Thus, in order to secure the safety, it is desired to connect the fluorescent lamp type LED lamp with a main body side of the lighting apparatus by an earth line. Particularly, in JIS C 8105-1, there is a demand for a response such as grounding in a case of using a power source in which a rated voltage exceeds 150 V.
According to one embodiment, a fluorescent lamp type light-emitting device lamp includes: a substantially cylindrical main body having one end portion and the other end portion; a light-emitting device disposed in the main body; and a pair of ferrules provided in the one end portion and the other end portion and connected to a socket, respectively, wherein one ferrule of the pair of ferrules is connected to earth via the ferrule, by being attached to the socket connected to earth.
Hereinafter, a lighting apparatus according to a first embodiment of the present invention will be described with reference to
In
As shown in
The main body 4 has an inner space, is formed in a substantially cylindrical shape, and is made by extrusion molding from a light-transmitting synthetic resin material. In a substantially middle portion in the inner portion of the main body 4, a long rectangular thermal radiation member 42 is disposed along the longitudinal direction. The thermal radiation member 42 is formed of an aluminum material or the like having satisfactory thermal conductivity. In addition, a molding method of the main body 4 is not particularly limited. Furthermore, for example, the main body 4 may be formed by coupling two semi-circular members to each other. Moreover, if the inner space can be formed, a cross-section may be a quadrangle.
In a substantially middle of the inner surface side of the main body 4, a pair of support protrusions 41 is oppositely formed (see
The substrate 51 is formed of a flat plate of a glass epoxy resin that is an insulation material, and a wiring pattern formed of a copper foil is provided on a front side thereof. Furthermore, a suitable resist layer may be provided. In addition, when using the insulation material, the material of the substrate 51 can use a ceramic or a synthetic resin material. Furthermore, when being made of metal, it is desirable to use a material such as aluminum which has satisfactory thermal conductivity and excellent thermal radiation characteristics.
The light-emitting device 52 is constituted by a solid light-emitting device such as an LED and an organic EL. In the present embodiment, the light-emitting device 52 is constituted by the LED, and a surface mounting type LED package is used. Specifically, the light-emitting device 52 includes an LED chip disposed on the main body formed of ceramic, and a light-transmitting resin for molding such as the epoxy-based resin and the silicone resin sealing the LED chip. In addition, in the present embodiment, the four light-emitting devices are disposed linearly on one substrate 51 along the longitudinal direction, but the number of the light-emitting devices is not particularly limited.
In addition, as mentioned above, the LED chip may be directly mounted on the substrate 51, and a bullet-shaped LED may be mounted. The mounting method and form are not particularly limited. For example, when mounting the light-emitting device on the substrate, there are cases of mounting the light-emitting device as the LED package by the surface mounting method, and directly mounting the light-emitting device on the substrate.
The LED chip is a blue LED chip that emits a blue light. A fluorescent substance is mixed with the light-transmitting resin, and in order to emit the white light, a yellow fluorescent substance which radiates a yellow-based light that is in a complementary color relationship with the blue light is used.
The ferrule 6 is, for example, a G13 type ferrule, and is configured so as to be attachable to the socket 3 of the lighting apparatus to which the existing straight tube type fluorescent lamp is attached. The ferrules 6 are provided on both end portions of the main body 4, and a pair of terminal pins 6a and 6b are projected and attached to the ferrule 6 portion. Herein, the ferrule 6 is made of a metal, but the pair of terminal pins 6a and 6b is configured in the electrical insulation state.
As is evident also with reference to
In addition, one of the pair of terminal pins 6b may be connected to earth. Furthermore, for example, both of the pair of terminal pins 6b may be connected to earth. As a result, when connecting the ferrule 6 to the socket 3, the earth connection is reliably performed without considering the directivity.
Next, as shown in
The socket 3 is an existing socket, and includes electric supply terminals 3a and 3b or the like to which the terminal pins 6a and 6b of the fluorescent lamp type light-emitting device lamp 2 are connected. In order to supply the electric power to the light source portion 5 of the fluorescent lamp type light-emitting device lamp 2, a power source lead line 31 is connected to the electric supply terminal 3a of the socket 3 of one end side (the left side in the drawing). Furthermore, in one of the electric supply terminal 3b of the socket 3 of the other end side (the right side in the drawing), an earth line 8 is connected to the lighting apparatus main body 1 by the screwing or the like. Since the lighting apparatus main body 1 is electrically connected to an earth terminal of the terminal board 11, the earthing is performed thereby. Thus, a state is obtained where none is connected to the one electric supply terminal 3b of the socket 3.
The lighting device 9 is connected to a commercial alternating current power source AC, and receives the alternating current power source AC to generate the direct current output. The lighting device 9, for example, connects a smoothing capacitor between output terminals of a full-wave rectifier circuit, and connects a direct current voltage converting circuit to the smoothing capacitor. A lead line 91 is derived from the lighting device 9, and the lead line 91 is connected from the power source lead line 31 to the electric power terminal 3a of the socket 3 via a connector 92. Furthermore, the lighting device 9 is connected to the terminal board 11 by the lead line.
The reflection plate 12 has a reflection surface and is attached to cover the opening portion of the lower surface side of the lighting apparatus main body 1. Furthermore, both end portions thereof in the longitudinal direction are formed with substantially rectangular notch cut out 12a to which the socket 3 is fitted.
A method of installing the fluorescent lamp type light-emitting device lamp 2 in the lighting apparatus main body 1 in regard to the lighting apparatus configured as above will be described. The present embodiment premises a case of renewal which replaces the straight tube type fluorescent lamp attached to the existing lighting apparatus with the fluorescent lamp type light-emitting device lamp 2.
Firstly, in the existing lighting apparatus, a straight tube type fluorescent lamp (not shown) is detached and the reflection plate 12 is detached. Next, a lighting device (not shown) of the straight tube type fluorescent lamp is detached, then, the lighting device 9 of the fluorescent lamp type light-emitting device lamp 2 is newly placed on the lighting apparatus main body 1, and the lead line is connected to the terminal board 11. Moreover, the lead line 91 connected to the lighting device 9 is connected to a power source lead line 31 derived from the socket 3 side via a connector 92. Furthermore, the earth line is connected to the electric supply terminal 3b of the socket 3, and the reflection plate 12 is attached to the lighting apparatus main body 1 side.
Next, the ferrule 6 of the fluorescent lamp type light-emitting device lamp 2 is mounted to the socket 3. As a result, the fluorescent lamp type light-emitting device lamp 2 is attached to the lighting apparatus main body 1. Thus, the light-emitting portion 5 is supplied with the electric power from the lighting device 9. The earth connection is performed from the ferrule 6 via the socket 3, and the fluorescent lamp type light-emitting device lamp 2 enters the grounding state. In addition, the socket 3 may be replaced depending on the degradation state of the socket 3.
As shown in the connection diagram of
In addition, as shown in the connection diagram of
In the lighting apparatus configured as mentioned above, when the electric power is supplied to the lighting device 9, electricity is conducted from the lead line 91, the power source lead line 31, the socket 3, and the ferrule 6 to the light-emitting device 52 via the substrate 51, and the respective light-emitting devices 52 are lighted. Light emitted from the light-emitting device 52 is radiated downward through the light-transmitting main body 4, and a predetermined range is irradiated.
Furthermore, since one ferrule 6 is connected to earth and is grounded, even if the insulation property of the substrate 51 or the like with the light-emitting device 52 mounted thereon is degraded, the insulation property between the substrate 51 and the thermal radiation member 42 is lowered and the electric current leaks to the thermal radiation member 42, the thermal radiation member 42 is grounded. Thus it is possible to prevent the risk of the electric shock or the like at the time of the maintenance such as the cleaning and the exchange of the fluorescent lamp type light-emitting device lamp 2.
According to the present embodiment as mentioned above, it is possible to apply the fluorescent lamp type light-emitting device lamp 2 that is structurally compatible with the existing fluorescence lamp. Further, the earth connection is performed by the use of the ferrule 6, it is possible to provide the lighting apparatus capable of securing the safety by the simple configuration.
Next, a lighting apparatus according to a second embodiment of the present invention will be described with reference to
As shown in
Herein, as shown in
According to the present embodiment, the socket 3 is attached to the lighting apparatus main body 1 and the earth connection is performed, and thus, an effect is exhibited in which the operation of earthing is easy.
Next, a lighting apparatus according to a third embodiment of the present invention will be described with reference to
The light source portion 5 includes a substrate 51, a light-emitting device 52 mounted on the substrate 51, and an insulation member 53 that covers the peripheries of the substrate 51 and the light-emitting device 52. As representatively shown in
The base member 54 is formed in a gutter shape having an opening portion 54a on one surface side thereof, and is formed of a PBT and an ASA resin. Furthermore, an edge portion of the opening portion 54a is formed with a step-like coupling step portion 54b along the longitudinal direction.
Similarly, the cover member 55 is formed in a gutter shape forming a curved surface shape (a lower convex portion in the drawing) having an opening portion 55a on one surface side thereof, and a coupling step portion 55b is formed so as to correspond to the coupling step portion 54b of the base member 54. The cover member 55 causes light emitted from the light-emitting device 52 to penetrate therethrough, and thus is formed by the transparent acryl resin.
In addition, if one has light-transmitting properties, the cover member 55 can be formed of another material, for example, polycarbonate or the like, without being limited to the acryl resin. In addition, as the material of the base member 54, a material having light-transmitting properties may be used. The cover member 55 can also have a light distribution control function, that is, a lens and diffusion function.
The edge portion of the substrate 51 is interposed and pinched between the opening portion 54a of the base portion 54 and the opening portion 55a of the cover member 55, that is, between the both coupling step portions 54b and 55b. Moreover, the portions of the coupling step portions 54b and 55b are supported so as to be pinched in the support protrusion 41 of the main body 4, and the light source portion 5 is disposed in the main body 4 (see
Furthermore, the light source portion 5 is configured so that the periphery of the substrate 51 with the light-emitting device 52 mounted thereon is surrounded by the insulation member 53. Moreover, the light source portion 5 is adapted to be disposed in the inner space of the main body 4 having the insulation property. Thus, the insulation member 53 has a first insulation function, and the main body 4 has a second insulation function, whereby the substrate 51, which is the electrically conductive portion, is doubly insulated, and the insulation property is strengthened. In addition, the insulation may be multiply performed. As a result, the insulating properties can be further strengthened.
For this reason, if the insulation properties of the substrate 51 or the like with the light-emitting device 52 mounted thereon is degraded, the insulation properties as the fluorescent lamp type light-emitting device lamp 2 can be secured. Furthermore, the lamp main body is connected to earth via the ferrule, and it is possible to prevent the risk of electric shock or the like at the time of the maintenance such as the cleaning and the exchange of the fluorescent lamp type light-emitting device lamp 2.
Next, a fourth embodiment of the present invention will be described with reference to
In the preset example, an insulation member 531 is formed of, for example, a foam resin material having predetermined flexibility. The insulation member 531 is formed in a substantially long rectangular parallelepiped shape, and a notch 531a facing the longitudinal direction, which is a transverse direction, is formed in a side middle portion thereof (see
As a result, the periphery of the substrate 51 is covered and insulated by the insulation member 531. By disposing the light source portion 5 in the inner space of the main body 4, the double insulation is performed and the insulation properties are strengthened. Furthermore, the main body 4 is connected to earth via the ferrule, and thus electrical safety is further provided.
In the present example, the substrate 51 with the light-emitting device 52 mounted thereon is, for example, covered by the transparent silicone resin as the insulation member. Although it is not shown, the insulation member can be manufactured by placing the substrate 51 and pouring the silicone resin having predetermined fluidity into a mold and hardening the same.
In this manner, by disposing the light source portion 5 covered by the insulation member 53 in the inner space of the main body 4, the double insulation is performed and the insulation properties can be strengthened. Furthermore, since the main body is connected to earth via the ferrule, and thus electrical safety is further provided.
In the present embodiment mentioned above, the fluorescent lamp type light-emitting device lamp is not limited to a form which is compatible with the straight tube type fluorescent lamp. Furthermore, the lighting device, which controls the lighting of the light-emitting device, may be disposed on the lighting apparatus main body side or may be disposed on the fluorescent lamp type light-emitting device lamp side.
In addition, in the embodiment mentioned above, a case has been described where the supply of the electric power to the fluorescent lamp type light-emitting device lamp is performed via the socket and the ferrule. However, an electric supply portion and the lighting device separately provided in the main body of the fluorescent lamp type light-emitting device lamp are connected to each other via the lead line, and the electric power may be supplied. Furthermore, the connection between the lighting device and the electric supply portion may be the connector connection.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
The present application claims a priority based on the benefit of preceding Japanese Patent Application Nos. 2010-102440 filed on Apr. 27, 2010, and 2010-102441 filed on Apr. 27, 2010, and seeks the profits thereof, the entire contents of which are hereby incorporated by reference.
1 lighting apparatus main body
2 fluorescent lamp type light-emitting device lamp
3 socket
4 lamp main body
5 light source portion
6 ferrule
6
a, 6b terminal pin
8 earth line
52 light-emitting device (LED)
53, 531 insulation member
| Number | Date | Country | Kind |
|---|---|---|---|
| 2010-102440 | Apr 2010 | JP | national |
| 2010-102441 | Apr 2010 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2011/060042 | 4/25/2011 | WO | 00 | 3/16/2012 |
