JPH0648342Y2 - Instrument lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a lighting device for an instrument used for transmitting and illuminating a finisher of an automobile instrument, for example.

[Conventional technology]

Illuminating means for causing the finisher of the instrument device installed in the front part of the driver's seat of a car to emit light in a dark place, for example, at night, may be a reflecting illumination means using a lamp arranged in front of the finisher or a finisher. There is an illuminating device such as an edge light that guides light from a lamp arranged on the back side of the.

[Problems to be solved by the device]

However, in the instrument device using the lighting means,
Lighting unevenness occurs in which the vicinity of the lamp or the edge light is bright and the distance becomes darker. Furthermore, there is a problem in that a space for arranging the illumination lamp and the edge light is required, and the depth direction of the measuring instrument becomes thick, and the measuring instrument becomes large in size.

[Means for Solving the Problems]

The present invention has been made in view of the above-mentioned conventional problems, and the first purpose thereof is to form a finisher of an instrument device with a semi-transmissive plate material and to form a sheet-shaped EL lamp (on the back surface of the finisher). Electroluminescent lamps) are overlapped and the entire surface of the finisher is uniformly illuminated by the light emission of this EL lamp. Therefore, by using this sheet-shaped EL lamp, the entire surface of the finisher can be uniformly and effectively illuminated without increasing the size of the instrument device. The second purpose is a light bulb for illuminating the dial, pointers, etc. incorporated in the instrument device in order to improve the life (durability) of the EL lamp used or to ensure uniform illumination. The heat diffusion reflector to prevent the EL lamp from receiving heat generated from
It is provided on the back surface of the EL lamp to improve the durability of the EL lamp and the uniformity of the emission brightness.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a lower case of an automobile instrument device, in which a plurality of instrument mechanical bodies 2 are fixed by mounting screws 3, and pointers 4 and characters of each instrument. A light bulb 6 for transmitting and illuminating the plate 5 is attached. The dial 5 is attached to the opening of the lower case 1, and a finisher 7, which also serves as a decorative plate, is attached to the periphery of the dial 5 avoiding the surface thereof. This finisher 7 is made of a semi-translucent material, and a sheet-shaped EL lamp 8 is superposed on the back surface of the finisher 7.
By making the EL lamp 8 emit light, the surface of the finisher 7 is lightly illuminated. Also above EL
On the back surface of the lamp 8, for example, a heat diffusion reflection plate 9 made of an aluminum plate having a thickness of about 0.5 mm is superposed. Reference numeral 10 is an upper case attached to the peripheral edge of the front opening of the lower case 1, and 11 is a transparent cover attached to the front surface of the upper case 10.

The configuration of the present embodiment is as described above. Next, the operation thereof will be described. The finisher 7 of the instrument device is made of a semi-transmissive light material, and the sheet-shaped EL lamp 8 is superposed on the back surface of the finisher 7. By combining them, the finisher 7 can be lightly transmitted and illuminated by activating an extremely thin (sheet-shaped) light source, that is, the EL lamp 8. Therefore, the illumination device of the finisher 7 enlarges the entire instrument device. The conventional inconvenience that is called can be solved. Further, in this embodiment, since the heat diffusion reflection plate 9 is superposed on the back side of the EL lamp 8, the instrument dial plate 5,
Even if the light bulb 6 for illuminating the pointer 4 is turned on, the heat generated from the light bulb 6 is not diffusely reflected by the heat diffusion reflection plate 9 and is not received by the EL lamp 8. The deterioration of durability and unevenness of illumination due to heat reception are effectively eliminated, and uniform light emission can be maintained over a long period of time.

In the embodiment shown in FIG. 3, a sheet-shaped heat insulating material 12 is interposed between the EL lamp 8 and the heat diffusion reflection plate 9 so that the EL lamp does not receive heat. Therefore, according to this embodiment, the adverse effects (unevenness of brightness, shortening of life) due to heat reception of the EL lamp can be effectively improved.

[Effect of device]

As described above, the present invention is directed to the indicator illuminated by the transillumination means and the finisher 7 applied to other parts excluding the indicator.
Alternatively, the EL lamp 8 is superposed on the back surface of the dial plate 5 and the heat diffusion reflection plate 9 is provided on the back surface of the EL lamp. Therefore, according to this, the illuminating means of the finisher is a sheet-like EL lamp. Therefore, the conventional inconvenience that the entire measuring device is upsized by the illumination mechanism of the finisher can be solved.

Further, in the present invention, even if a light bulb for illuminating, for example, an instrument, a dial, a pointer, etc. is turned on, the heat generated from the light bulb is diffused and reflected by the heat diffusion reflection plate 9 or the like, and is reflected by the EL lamp 8. Since no heat is received, deterioration of durability and uneven illumination due to the heat received by the EL lamp 8 are effectively eliminated, and it is possible to obtain an effect that uniform light emission can be maintained over a long period of time.

[Brief description of drawings]

FIG. 1 is a front view of an instrument equipped with an instrument illuminating device according to the present invention, FIG. 2 is a cross-sectional explanatory view of an essential part thereof, and FIG. 3 is a cross-sectional explanatory view of an essential part showing another embodiment of the present invention. Is. 1 ... Lower case, 2 ... Instrument mechanical body 3 ... Mounting screw, 4 ... Pointer 5 ... Dial, 6 ... Light bulb 7 ... Finisher, 8 ... EL lamp 9 ... Heat diffusion reflector, 10 ... Upper case 11 ... Transparent cover, 12 … Insulation

Claims (1)

[Scope of utility model registration request] 1. An instruction unit illuminated by transmissive illumination means,
Illumination of an instrument characterized in that an EL lamp (8) is superposed on the rear surface of the finisher (7) and a heat diffusion reflection plate (9) is provided on the rear surface of the finisher (7) except for this indicating portion. apparatus.