JPH0317340Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention particularly relates to a display device for an automobile.

[Background of the idea]

Conventionally, examples of this type of display device include those shown in FIGS. 3 and 4. This shows an instrument panel of an automobile, and a cluster lid 2 installed inside this instrument panel 1 includes a combination meter 3 containing a speedometer, a tachometer, etc.
An alarm display device 4 and the like are installed at the front lower part of the combination meter 3. This display device 4 is designed to turn on a lamp 5 and issue an alarm when the engine coolant temperature, lubricating oil pressure, brake oil level, etc. rise or fall excessively. This alarm display device 4 is the fifth
As shown in the figure, a cylindrical case 6 made of synthetic resin has a partition chamber 7 partitioned by a plurality of partition plates. A printed wiring board 9 is attached to the opening, and the lamp 5 is attached to the wiring board 9 and placed in the partition 7, and when the lamp 5 is turned on, the display board 8 displays, for example, It reads warning characters such as "OIL" and "TEMP". 10 is a transparent cover, and 11 is a socket for the lamp 5.

However, in such a conventional display device, the interior of the partition 7 is sealed, so if the volume is small, the heat generated by the lamp 5 tends to be trapped inside the partition 7. Therefore, there were problems in that a part of the cylindrical case 6 was discolored and the display board 8 was discolored.

[Purpose of invention]

The present invention was developed by focusing on these conventional problems, and by making it possible to circulate the air inside and outside the partitioned room, the temperature rise inside the partitioned room can be suppressed.
It is an object of the present invention to provide a display device in which discoloration of a cylindrical case, a display board, etc. can be prevented.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIGS. 1 and 2.

The display device 20 according to this embodiment has a resin cylindrical case 23 having a partition chamber 22 partitioned by a plurality of partition plates 21, and has a substantially convex side surface, and a display plate 8 is formed in the front small diameter opening 23a. At the same time, a printed wiring board 9 on which a lamp 5 is mounted is fixed to the rear large-diameter opening 23b. The cylindrical case 23 is attached to the instrument panel 1 with the upper and lower opening edges of the small-diameter opening 23a abutting against the opening edges of the cluster lid 2 with the display plate 8 sandwiched therebetween. .

In addition, through holes 26 are formed in the upper wall surface 24 and lower wall surface 25 of the partition chamber 22, respectively, and a light-shielding cover 27 having an approximately inverted U-shaped cross section and opening at the front end covers the through holes 26. It is formed integrally with the cylindrical case 23, and the inside of the partition 22 communicates with the outside of the cylindrical case 23 through the ventilation passage 28 formed in the light shielding cover 27 and the through hole 26. .

That is, since the air inside the partition chamber 22 circulates with the outside of the cylindrical case 23 via the ventilation passage 28 and the through hole 26 formed in the light-shielding cover 27, the air inside the partition chamber 22 is circulated by lighting the lamp 5. The warmed air inside is discharged outside through the ventilation passage 28 and the through hole 26, and the cool air is supplied into the partition chamber 22 through the ventilation passage 28 and the through hole 26, so that the inside of the partition chamber 22 is cooled. The temperature rise is prevented and the cylindrical case 23
Furthermore, the display board 8 and the like are prevented from discoloring or deforming due to heat.

Furthermore, since the through hole 26 is covered by the light shielding cover 27, the light from the lamp 5 is prevented from leaking outside the partition 22.

[Summary of the idea]

As explained above, in the present invention, the transmitted illumination type display plate 8 is attached to the front opening of the cylindrical case 23 made of a resin material, and the light source 5 inserted into the cylindrical case 23 is attached to the rear opening. In the display device in which the mounted printed wiring board 9 is fixed and the light from the light source 5 is passed through the transmitted illumination type display board 8 for display, the upper and lower wall surfaces 24 and 25 of the cylindrical case 23 are A display device comprising a light shielding cover 27 which forms a through hole 26 and a passage 28 communicating with the through hole 26 and prevents light from the light source 5 from leaking through the through hole 26. be.

(Effect of the invention) Therefore, according to the display device according to the invention, through-holes 26 are formed in the upper and lower wall surfaces 24 and 25 of the cylindrical case 23, respectively, and the through-holes 26 communicate with each other.
A light shielding cover 2 that covers the through hole 26 without interfering with the circulation of air circulating inside and outside the case 23 through the light shielding cover 2.
7 is provided in the cylindrical case, even if the temperature inside the cylindrical case 23 rises due to lighting of the light source 5, warmed air is formed in the through hole 26 of the upper wall surface 24 and the light shielding cover 27. Cool air is discharged to the outside of the case through the passage 28, and is further supplied through the passage 28 formed by the through hole 26 of the lower wall surface 25 and the light shielding cover 27 to cool the inside of the case. It is possible to prevent discoloration and deformation of the display panel 8 etc. due to heat, and since the through hole 26 is covered with a light shielding cover 27, the cylindrical case 2
The cylindrical case 23 can prevent the light from the light source 5 from leaking out of the case.
Since the front opening to which the transmitted illumination type display board 8 is attached and the rear opening to fix the printed wiring board 9 to which the light source 5 is attached are formed, the structure of the mold can be easily adjusted when injection molding the resin. The process becomes simple, the mold has excellent durability, and manufacturing costs are reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a display device according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, FIG. 3 is a front view of a conventional display device, and FIG. FIG. 3 is a sectional view taken along the line - in FIG. 3, and FIG. 5 is a perspective view of the same essential parts. 20...display device, 21...partition plate, 22...
Partition room, 23... cylindrical case, 24... upper wall surface,
25...lower wall surface, 26...through hole, 27...shading cover, 28...ventilation duct.

Claims (1)

[Scope of utility model registration request] A transilluminated display board 8 is attached to the front opening of a cylindrical case 23 made of a resin material, and a printed wiring board 9 to which a light source 5 inserted into the cylindrical case 23 is attached is fixed to the rear opening. In the display device in which the light from the light source 5 is passed through the transmitted illumination type display plate 8 for display, the upper and lower wall surfaces 24 and 25 of the cylindrical case 23 are provided with through holes 2, respectively.
6, and a light shielding cover 27 which forms a passage 28 communicating with the through hole 26 and prevents light from the light source 5 from leaking through the through hole 26.