JP2586106Y2 - Lighting equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device used as a backlight for a liquid crystal display device or the like, and more particularly to a lamp holder used for fixing a light source such as a fluorescent lamp having a U-shaped bent portion to a case. It relates to a lighting device to be used.

[0002]

2. Description of the Related Art Conventionally, as a lighting device for illuminating a display unit by irradiating light from the back of a liquid crystal display device or the like, for example, a fluorescent lamp having a U-shaped bent portion in which two linear portions are substantially parallel to each other is used. In order to support and fix the fluorescent lamp, a rubber lamp holder having a fitting concave portion into which the bent portion is fitted is used (for example, Japanese Utility Model Publication No. 4-23260). .

[0003] However, in the lamp holder, when the fluorescent lamp is supported and fixed to a case where no mounting hole is formed, vibration and impact cannot be absorbed depending on the use conditions of the lighting device. There were problems such as breaking.

In order to solve the above problems,
As shown in FIG. 4, a rubber lamp holder 3 for supporting and fixing the fluorescent lamp 1 to the case 2 is provided with a fitting concave portion 3A on the front surface, into which a U-shaped bent portion 1A of the fluorescent lamp 1 is fitted, and has a rectangular column shape. Upper end 3B which is formed at the end and becomes thinner toward the tip
Was bent in a U-shape toward the rear side. The bent upper end portion 3B of the lamp holder 3 was in contact with the projection 2A of the case 2 when attached to the case 2, and supported and fixed the fluorescent lamp 1 by the elasticity of the bent upper end portion 3B.

[0005]

However, the lamp holder 3 is difficult to assemble because the upper end 3B is folded and assembled into the case 2, and the upper end 3B is a rubber elastic member. Variations are likely to occur in the folding of the portion 3B, and there have been problems such as displacement and rattling of the fluorescent lamp 1 due to vibration, impact and the like after assembly.

When a heater for warming the fluorescent lamp 1 is provided below the fluorescent lamp 1 for the purpose of improving the responsiveness of the fluorescent lamp 1 at a low temperature, the lamp holder 3 Since the lamp 1 is easily displaced upward, an interval is generated between the heater and the fluorescent lamp 1, the fluorescent lamp 1 cannot be efficiently heated, and the responsiveness of the fluorescent lamp 1 at low temperatures does not improve. There were also points.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention accommodates a fluorescent lamp having a bent portion in a case and mounts the bent portion of the fluorescent lamp on an elastic lamp holder. the Ranpuhoru together with the lighting device for supporting the casing, the fitting recess corresponding to the bent portion of the fluorescent lamp in the lower front of the fluorescent lamp and facing to the lamp holder, corresponding to the fitting recess using
An air gap is provided below the center of the die.

[0008]

According to the above construction, the fluorescent lamp can be easily assembled to the case, the assembling can be performed more reliably, and the fluorescent lamp can be prevented from being displaced upward such as floating.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to FIGS. 1 to 3, but the same or corresponding parts as those of the conventional example will be denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 to 3, a lamp holder 3 for supporting and fixing a fluorescent lamp 1 used in a lighting device 5 of the present invention to a case 2 is a rectangular parallelepiped made of translucent silicone rubber having elasticity. A trapezoidal projection 3D having an inclined surface 3C on the front surface is formed, and a fitting recess 3A into which the bent portion 1A of the fluorescent lamp 1 is fitted at the lower end of the projection 3D.
To form In addition to the elasticity of the lamp holder 3 itself when the fluorescent lamp 1 is assembled to the lamp holder 3, the lamp holder 3 is further deformed to support and fix the fluorescent lamp 1. Below the center, a hole 3E is formed, which is a void opening on the lower surface of the lamp holder 3. And on the upper surface of the lamp holder 3,
A convex portion 3F for positioning the diffusion plate 4 to prevent the lamp holder 3 from floating upward, and a convex portion 3G for fixing the lamp holder 3 to the case 2 are formed on the rear surface.

Using this lamp holder 3, the fluorescent lamp 1
Is fixed to the case 2 and has an opening 2B on the front surface of the case 2; a spacer 6 for the fluorescent lamp 1 on the bottom 2C; A sheet-like heater 7 and a reflector 8 for reflecting light from the fluorescent lamp 1 are sequentially arranged. And
The bent portion 1A of the fluorescent lamp 1 is fitted into the fitting concave portion 3A of the lamp holder 3 and assembled to the lamp holder 3, and the convex portion 3G of the lamp holder 3 is fitted to the hole 2D of the case 2 and assembled. . Next, when disposing the diffusion plate 4 in the opening 2B of the case 2, the notch 4A that fits into the projection 3F of the lamp holder 3 is fitted, and the diffusion plate 4 is fixed with screws (not shown) to diffuse the light. The lamp holder 3 is fixed by the plate 4 to prevent the lamp holder 3 from rising.

At the time of assembling, the holes 3E, which are voids of the lamp holder 3, are bent, and the fluorescent lamp 1 does not float upward but is pressed against the reflecting plate 8 provided below. Is transmitted to the fluorescent lamp 1 through the reflection plate 8.

The present invention is not limited to the above embodiment, but can be variously modified within the scope of the present invention. For example, in the above embodiment, the lamp holder 3 is formed of a translucent elastic member.
There is no problem if it is formed of a transparent or opaque material.
In addition, the gap portion may have a shape that bends downward including the central portion of the lamp holder 3, and may have, for example, a shape that penetrates the side surface of the lamp holder 3 downward including the central portion.

[0014]

According to the present invention, the above arrangement causes a deflection when the fluorescent lamp is assembled to the case, and allows the fluorescent lamp to be securely assembled to the case, and the lamp holder bends at the lower side of the lamp holder. The floating of the fluorescent lamp can be prevented, the heat from the sheet heater is reliably transmitted to the fluorescent lamp, the response of the luminance of the fluorescent lamp at low temperatures is improved, and the response of the lighting device is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a cutaway plan view of a main part of the embodiment.

FIG. 3 is a perspective view of the lamp holder of the embodiment.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluorescent lamp 1A Bent part 2 Case 3 Lamp holder 3A Fitting concave part 3E Hole part (gap part) 5 Lighting device 6 Spacer 7 Heater 8 Reflector

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-47603 (JP, A) JP-A 64-36912 (JP, U) JP-A 64-36913 (JP, U) JP-A 64-64 36914 (JP, U) Jingu 4-23260 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) F21V 19/00 320 G02F 1/1335 530

Claims (1)

(57) [Scope of request for utility model registration] 1. A lighting device in which a fluorescent lamp having a bent portion is accommodated in a case and the bent portion of the fluorescent lamp is supported by the case using a lamp holder having elasticity. A fitting recess corresponding to the bent portion of the fluorescent lamp below the front surface opposite to
An illuminating device, wherein a cavity is provided below the lamp holder and below the center of the lamp holder corresponding to the fitting recess.