JP3731764B2 - Lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an illuminating device that illuminates and displays a display unit from behind using a light guide plate.
[0002]
[Prior art]
FIG. 8 is a cross-sectional view showing a conventional lighting device disclosed in, for example, Japanese Patent Application Laid-Open No. 4-206106. In FIG. 8, reference numeral 1 denotes an instrument main body having an opening on the lower side embedded in a ceiling, and a light source 3 and the light source. 3 is turned on. Reference numeral 2 denotes a display unit having a light guide plate inside. The display unit 2 is fastened integrally with the lid body 4 and is locked to the instrument body 1 by a locking piece 5. When the light source 3 is turned on, light is transmitted to the light guide plate in the display unit. Incident light is applied to the display object from behind.
[0003]
However, in the above-described conventional example, since the light source 3 is attached to the instrument main body 1, when replacing the light source 3, it is necessary to remove the fastening unit of the display unit 2 and the lid body 4, which is very difficult for replacement work at high places. This is a time-consuming configuration.
[0004]
9 is shown in Japanese Patent Application Laid-Open No. 7-240104. In the figure, the illumination device is composed of two units, a fixture main body 1 and a display unit 2. The instrument body 1 is provided with a ceiling portion 6 attached to a ceiling surface or the like, and an opening 7 is formed on the lower surface of the display unit 2 so as to be detachable.
Inside the instrument main body 1, a lighting device for the light source and a pair of conductive plug receptacles 8 are attached, and the lighting device is electrically connected to the plug receptacle 8.
The display unit 2 houses a light guide plate 9 that guides light and reflects and diffuses it inside, and a reflector 10 having a substantially U-shaped cross section that opens toward the upper end surface of the light guide plate 9 is attached. At both ends, a pair of holders 11 having a conductivity and spring elasticity formed in a substantially C-shaped cross section are attached, and the cold cathode lamp 12 is held in an electrically connected state by the holders 11.
On the upper surface of the reflector 10, a plug 14 made of a conductive metal and having a pair of bulging portions 13 that are electrically connected to the respective holders 11 protrudes upward.
[0005]
In another example of the publication, as shown in FIG. 10, a cold cathode lamp (not shown) having locking holes 15 on both end faces of the display unit 2 and housed inside the display unit on the back side. The terminal part 16 electrically connected to is disposed.
The upper surface of both end edges of the opening 17 formed in the bottom plate 1a of the instrument body 1 has conductivity, and a locking body 18 formed in a columnar shape and a conductive spring (not shown) are held. The metal plate 19 holds the bottom plate 1a. The spring always urges the locking body 18 so as to protrude inward, and is electrically connected to the lighting device inside the instrument body by the lead wire 20.
[0006]
Next, the operation of the prior art will be described. In FIG. 8, the instrument main body 1 is attached to a ceiling surface, and a light source 3 such as a fluorescent lamp is disposed inside. A display unit 2 is arranged at the lower part of the fixture body 1 so that the end face of the light guide plate is opposed to the light source 3 and can be attached to and detached from the ceiling surface by a locking piece 5 of a lid 4 fastened and integrated with the display unit 2. Locked. When the light source 3 is turned on, light enters from the end face of the light guide plate, and the display object of the display unit 2 is irradiated from the rear by the diffuse reflection means of the light guide plate.
[0007]
In FIG. 9, a cold cathode lamp 12 is mounted on a pair of holders 11 at both ends of the reflector 10 on the upper end surface of the display unit 2. The holder 11 is provided with a pair of plugs that are electrically connected to the upper surface of the reflector 10, and is connected to a plug receiver 8 in the instrument body described later.
Since the plug receiver 8 in the instrument body is electrically connected to the lighting device and is formed to be smaller than the diameter of the bulging portion 13 of the inner diameter of the plug receiver 8, the plug 14 is press-fitted into the plug receiver 8. At this time, the bulging portion 13 is elastically pressed and electrically connected to the inner wall of the plug receiver 8 and is mechanically held by a frictional force.
[0008]
In FIG. 10, with the locking body 18 of the instrument body 1 moved outward, the upper part of the display unit 2 is inserted into the opening 17 and the locking body 18 is moved inward, whereby The distal end portion of the stopping body 18 is inserted into the locking hole 15 and mechanically held, and the distal end of the locking body 18 is pressed against the terminal portion 16 to be electrically connected.
[0009]
[Problems to be solved by the invention]
In the illumination device of the above-described conventional example, the light source is mounted on the fixture body and is configured separately from the display unit. Therefore, when replacing the light source, the workability is improved because the light source is replaced after removing the display unit in high places. bad.
[0010]
In addition, when the light source is arranged in the display unit and the plug is protruded, the light source replacement workability is improved, but the mechanical holding force is insufficient only with the elastic force and frictional force of the plug. It cannot withstand the impact of hitting an object.
[0011]
In addition, although it is possible to insert the latching body into the display unit by means of a spring and to electrically connect it as well as to hold it mechanically, it is time-consuming to assemble to make the latching body work mechanically. There is a problem with.
[0012]
In addition, there is a case where a charging device is provided to prevent the lighting device from disappearing due to a power failure or the like and the charging state is displayed.
[0013]
The present invention has been made to solve the above-mentioned problems, and it is possible to easily replace the light source, to facilitate the installation of the display unit even during construction, and to prevent vibrations and impacts on the display unit. However, it is an object of the present invention to provide an illumination device that has no danger of dropping or the like and has improved assembly workability.
[0014]
[Means for Solving the Problems]
In the illumination device according to the present invention, a rectangular plate-like display unit having a light source that illuminates the display unit via the light guide plate, and a detachably attached to the display unit and power to the light source of the display unit. A lighting device including an appliance body to be supplied, wherein a display unit is provided at a portion to be mounted on an opposing instrument body, and a locked portion that is locked to the instrument body, and opposite surfaces A guide rod provided in a portion attached to the instrument body and projecting in a direction perpendicular to the direction of attachment to the instrument body, and an electrical connection portion electrically connected to the light source, wherein the instrument body is engaged with the display unit. A guide rod comprising: a latch portion that latches the latch portion; a guide groove that guides the guide rod of the display unit in the mounting direction to the instrument body; and an electrical connection connector that supplies power to the electrical connection portion of the display unit. The display unit is mounted on the instrument body by moving along the guide groove and the locked portion is locked to the locking portion, and at the time of mounting, the electrical connection portion is connected to the electrical connection connector. .
[0015]
Further, when the display unit is mounted from below the instrument main body and the locking between the locking part and the locked part is released, the guide bar is locked to the tool main body so as to prevent the display unit from dropping. Is.
[0016]
In addition, the fixture body includes a locking plate, the locking portion of the fixture body is a locking hole provided in the locking plate, and the locked portion of the display unit protrudes outward from both sides of the display unit. It is what made it the latching piece which has.
[0017]
Further, a guide groove is provided in the locking plate.
[0018]
Further, the display unit includes a printed wiring board having a holder for holding a light source, and an electrical connection portion of the display unit is provided on the printed wiring board.
[0019]
Further, the surface of the printed wiring board on the light guide plate side is subjected to white coating or white printing.
[0020]
The printed wiring board is provided with monitoring means for emergency charging means.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
An embodiment of the present invention will be described below with reference to FIGS. 1 is a perspective view showing an illumination apparatus according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of a display unit, FIG. 3 is a perspective view of a cold cathode lamp used in the apparatus, and FIG. 4 is a part of FIG. It is an enlarged view.
In the figure, the lighting device of the present invention is composed of two units, an instrument body 1 and a display unit 2. Reference numeral 1 denotes an instrument body formed in a substantially cross-sectional shape in cross section, and includes a lighting device 6, an electrical connection connector 51 having a contact 65 inside which is electrically connected to the display unit 2, and a locking portion for mechanical holding. A locking plate 54 having 55 is disposed in the vicinity of both ends of the instrument body, and the upper surface is attached to the ceiling surface. Reference numeral 50 denotes a frame that covers the instrument main body 1, and an opening 12 into which the display unit 2 is inserted is provided on a surface facing the upper surface of the instrument main body.
[0022]
The display unit 2 is formed in a box shape having a bottom surface, side surfaces, and end surfaces, and a surface opposite to the bottom surface is opened, and a pair of printed wiring boards 52 protrudes from the display unit 2 in the vicinity of the side surfaces. It is arranged. The printed wiring board 52 has a metal cap 59 of the cold cathode lamp 60 electrically connected to the substantially central portion of the display unit 2 and a holder 58 that is held by mechanical elastic force is connected by solder to the electrical contact portion 53. Is conducted by.
A locking piece 57 that is elastically movable inwardly of the display unit 2 by a U-shaped notch 61 is provided on the outer side of the both sides of the display unit 2. A light guide plate 63 having a groove 64 for accommodating the cold cathode lamp 60 is provided so as to cover the opening surface, and a display plate 62 is attached to the light guide plate 63.
The surface of the light guide plate 63 is diffusely reflected, and the surface of the printed wiring board 52 on the light guide plate 63 side is painted or printed in white to improve reflection.
[0023]
4, the guide rods provided on both sides the upper end of the display unit 2 68, 69 provided in the locking plate 54, notches, 75 instrument body display unit 2 in which the guide rod 68 is inserted A guide straight portion 76 that guides the guide rod 68 in the mounting direction when mounted on 1, and an inclined portion 76 between the notch portion 69 and the guide straight portion 75.
[0024]
Next, operations related to electrical connection will be described. The lighting device 6 in the appliance main body 1 and the contact 65 in the electrical connection connector 51 are electrically connected using a lead wire 66 or the like, and supplies current to the display unit 2 as the electrical connection connector 51.
The electrical contact portion 53 and the contact 65 of the printed wiring board projecting from the display unit 2 are obtained when the printed wiring board 52 is inserted into the square hole 67 of the electrical connection connector 51 when the display unit 2 is attached to the instrument body 1. The electrical contact portion 53 and the contact 65 are in electrical pressure contact, and current is supplied to the printed wiring.
Since the printed wiring of the printed wiring board 52 is electrically connected to the holder 58, a current is supplied from the holder 58 to the metal cap 59 of the cold cathode lamp 60, and the cold cathode lamp is turned on.
Light generated by lighting enters the light guide plate 63 through the wall of the groove 64 of the light guide plate 63, exits from the surface of the light guide plate 63 by diffuse reflection, and irradiates from the rear of the display plate 62 to illuminate the display plate 62.
[0025]
Next, the holding of the mechanical display unit will be described. The guide bars 68 provided at the upper end portions on both sides of the display unit 2 are inserted through the notches 69 of the locking plate 54 provided in the instrument body 1. Next, the display rod 2 is attached to the instrument main body 1 along the guide inclined portion 76 and the guide straight portion 75.
The locking piece 57 is elastically movable inward of the display unit 2 simultaneously with the electrical connection operation of the display unit 2 with respect to the locking portion 55 of the locking plate 54 provided in the vicinity of both ends of the instrument body 1. Then, the elastic force is released at the locking portion 55 and the projection is re-projected outward, whereby the locking piece bottom portion 56 is placed on the locking portion 55 and the display unit 2 is mechanically held on the instrument body 1. The
Further, in order to remove the display unit 2 from the instrument main body 1, the display unit 2 is moved by pushing the locking piece 57 inwardly from the outside, releasing the locking piece bottom 56 from the locking part 55, and pulling the display unit 2 downward. Can be removed.
[0026]
As described above, in order to replace the cold cathode lamp 60, if the display unit 2 is removed, the replacement work is not performed at a high place, but can be easily replaced on a desk, for example.
In addition, the installation work of the lighting device can be improved without touching the cold cathode lamp 60 which is thin and easily broken, so that the workability can be improved.
Further, since the guide bar 68 is attached, the display unit can be smoothly attached to the instrument body, and when the locking piece 57 is accidentally pushed, the locking piece bottom 56 is detached from the locking portion 55. Even in this case, the guide bar 68 stops at the locking portion 55, and the display unit 2 can be prevented from dropping.
In addition, since the surface of the printed wiring board on the light guide plate side is painted or printed in white, it is possible to brighten the dark part of the end of the cold cathode lamp of the display unit that does not emit light.
Furthermore, the number of parts is small, and assembly workability can be improved.
[0027]
In the above embodiment, the case where the display plate 62 is on one side of the display unit 2 has been shown. However, two display units 2 can be arranged back to back and the display can be on both sides of the display unit 2.
[0028]
Embodiment 2. FIG.
In the first embodiment, the locking piece 57 is provided on the upper part on the outer side of both side surfaces of the display unit 2. However, as shown in FIG. 5, the surface side of the display plate 62 and the bottom surface of the display unit. A pair of locking pieces 69 are provided on the back side and elastically moved inward of the display unit by a U-shaped notch 74, thereby locking the locking pieces 72 on the locking plate 71 of the fixture body 1. The bottom part 70 is mounted. Further, in order to remove the display unit 2 from the instrument body 1, the locking piece 69 is pushed inward, or the operation portion 73 provided integrally with the locking piece 69 is pushed and removed.
The lighting device according to the present embodiment is used when the lighting device locking piece 57 shown in FIG. 1 of the first embodiment has a small gap between the building and the display unit 2 cannot be attached to the fixture body 1. be able to.
[ 0029]
Embodiment 3 FIG.
Moreover, as shown in FIG. 6, the printed wiring board 52 may be protruded to the back side of the bottom surface of the display unit 2 and an electrical connection contact 53 may be provided on the protruding portion, which can be used for an illumination device used by being attached to a wall surface. .
[0030]
Embodiment 4 FIG.
This embodiment relates to the attachment of the monitor means for indicating the charging state of the rechargeable battery in order to prevent the lighting device from disappearing due to a power failure or the like, and FIG. 7 will be described. In the figure, 76 is a light emitting diode which is a monitoring means provided in the lower part of the printed wiring board 52, and an electrical contact 53a for the light emitting diode is provided so as to be arranged in parallel with the printed wiring 53 to the cold cathode lamp 60. It has been.
As described above, the current supply to the light emitting diode 76 can be connected to the contact provided for the light emitting diode of the lighting device and the electrical connection connector 51 with the lead wire, and it is not necessary to connect to the lower part of the display unit with the lead wire. Short lead wires can be used and assembly workability can be improved.
Further, since there is no lead wire in the display unit 2, it is possible to prevent shadows due to the lead wire on the display surface.
[0031]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0032]
Illumination comprising a rectangular plate-like display unit having a light source that illuminates the display unit via a light guide plate, and an appliance body that is detachably attached to the display unit and supplies power to the light source of the display unit An apparatus, wherein the display unit is provided in a part to be attached to the opposing instrument body and is to be locked to the instrument body, and a part to be attached to the opposing instrument body. A locking portion provided with a guide rod that is provided and protrudes in a direction perpendicular to the mounting direction to the device main body, and an electrical connection portion that is electrically connected to the light source, and the device main body locks the locked portion of the display unit. And a guide groove for guiding the display unit guide bar in the mounting direction of the instrument body, and an electrical connection connector for supplying electric power to the electrical connection part of the display unit, and the guide bar moves along the guide groove. Locked part Since the display unit is mounted on the instrument body by being locked to the locking portion and the electrical connection portion is connected to the electrical connection connector at the time of mounting, the light source can be easily attached and replaced, The display unit can be installed smoothly on the instrument body.
[0033]
Further, when the display unit is mounted from below the instrument main body and the locking between the locking part and the locked part is released, the guide bar is locked to the tool main body so as to prevent the display unit from dropping. Therefore, even if the locking between the locking part and the locked part is erroneously released, the display unit can be prevented from falling.
[0034]
In addition, the fixture body includes a locking plate, the locking portion of the fixture body is a locking hole provided in the locking plate, and the locked portion of the display unit protrudes outward from both sides of the display unit. Therefore, the mounting and replacement of the light source can be facilitated, and the number of parts can be reduced.
[0035]
Further, since the guide groove is provided in the locking plate, the number of parts can be reduced.
[0036]
Further, the display unit includes a printed wiring board having a holder for holding the light source,
Since the electrical connection part of the display unit is provided on the printed wiring board, the number of parts can be reduced.
[0037]
Moreover, since the white coating or white printing was given to the surface at the side of the light-guide plate of a printed wiring board, the edge part which does not light-emit a light source can be made bright.
[0038]
Further, since the monitoring means of the emergency charging means is mounted on the printed wiring board, the assembling workability can be improved and the shadow on the display surface of the lead wire connected to the monitoring means can be prevented. .
[Brief description of the drawings]
FIG. 1 is a perspective view in which a part of an illumination device showing Embodiment 1 of the present invention is broken.
FIG. 2 is an exploded perspective view of a display unit of the illumination device according to Embodiment 1 of the present invention.
FIG. 3 is a perspective view of a cold cathode lamp of the illumination apparatus showing Embodiment 1 of the present invention.
FIG. 4 is a partially enlarged perspective view of the lighting apparatus showing Embodiment 1 of the present invention.
FIG. 5 is a partially enlarged perspective view of a lighting apparatus showing Embodiment 2 of the present invention.
FIG. 6 is an exploded perspective view of a lighting apparatus showing Embodiment 3 of the present invention.
FIG. 7 is a perspective view in which a part of an illuminating device showing Embodiment 4 of the present invention is broken.
FIG. 8 is a cross-sectional view showing a conventional lighting device.
FIG. 9 is a cross-sectional view showing another conventional lighting device.
FIG. 10 is a perspective view showing another conventional lighting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Instrument body, 2 Display unit, 51 Electrical connection connector, 52 Printed wiring board, 53 Electrical contact part, 57 Locking piece, 58 Holder, 60 Cold cathode lamp, 63 Light guide plate, 68 Guide rod, 76 Light emitting diode, 78 White Painting, white printing.

Claims (7)

Illumination comprising a rectangular plate-like display unit having a light source that illuminates the display unit via a light guide plate, and an appliance body that is detachably attached to the display unit and supplies power to the light source of the display unit A device,
The display unit is
A locked portion that is provided in a part that is mounted on the opposite side of the instrument body and is locked to the instrument body;
A guide bar that is provided in a part that is mounted on the opposite side of the instrument body and that protrudes in a direction perpendicular to the direction of attachment to the instrument body;
An electrical connection portion electrically connected to the light source,
The instrument body is
A locking portion for locking the locked portion of the display unit;
A guide groove for guiding the guide bar of the display unit in the mounting direction to the instrument body;
An electrical connection connector for supplying power to the electrical connection portion of the display unit;
When the guide bar moves along the guide groove and the locked portion is locked to the locking portion, the display unit is mounted on the instrument body, and at the time of mounting, the electrical connecting portion is A lighting device connected to the electrical connector . The display unit is mounted from below the instrument body,
2. The guide body according to claim 1 , wherein when the locking between the locking portion and the locked portion is released, the guide bar is locked to the instrument body so as to prevent the display unit from falling . lighting equipment. The instrument body includes a locking plate;
While the locking portion of the instrument body is a locking hole provided in the locking plate,
The lighting device according to claim 1, wherein the locked portion of the display unit is an elastic locking piece that protrudes outward from both surfaces of the display unit . The lighting device according to claim 3, wherein the guide groove is provided in the locking plate . The display unit includes a printed wiring board having a holder for holding the light source,
The lighting device according to claim 1, wherein the electrical connection portion of the display unit is provided on the printed wiring board . The lighting device according to claim 5, wherein white coating or white printing is performed on a surface of the printed wiring board on the light guide plate side . The lighting device according to claim 5, wherein a monitoring means for emergency charging means is mounted on the printed wiring board .

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