JPH0623934Y2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a display device, particularly to a display device used in a vibrating atmosphere such as an automobile, a motorcycle or an agricultural machine.

[Conventional technology]

Generally, this type of display device accommodates and fixes various indicators for displaying measured values such as vehicle speed and engine speed in the case, and these night illumination lamps. A display box is provided to inform the driver of various display contents such as position display and fuel shortage. This display box is divided by a partition wall corresponding to each of the various display contents, and a display lens provided on the front surface of each compartment is illuminated by lighting a display lamp provided at the bottom of each compartment. There is.

In addition, a dial (front plate) that serves as a display is provided on the front of the display.
In general, the dial and the display are fixed by screwing the dial plate to the instrument body in the vicinity of the center.However, the dial is usually more sufficient than the display in consideration of visibility. Since it is formed with a large area, the peripheral part of the dial that is away from the fixed part by the screw is liable to resonate due to the vibration received from the vehicle, and this resonance may affect the indicating characteristics of the instrument or generate squeak noise. May be invited.

Therefore, in order to control such vibrations around the dial,
For example, as disclosed in Japanese Utility Model Laid-Open No. 61-96314, a plurality of fixing grooves are formed by opening the peripheral edge of a dial plate at appropriate intervals, and each fixing groove has a rod-like shape made of a flexible material. By providing a cushioning member, the lower end of this cushioning member is abutted against the tip of a columnar boss protruding from the bottom wall of the case, and the upper end of the cushioning member is abutted against the front cover provided on the front surface of the case, It has been proposed to suppress vibration of the dial by absorbing vibration from the vehicle.

[Problems to be solved by the device]

By the way, in recent years, in the automobile, there is a tendency toward downsizing and thinning of the instrument case itself in order to effectively use the space inside the vehicle. Since the boss portion is provided so as to project, a space for disposing the boss portion is required, which hinders downsizing of the case. Also, due to the miniaturization of the case itself, the assembly parts to be housed in the case are arranged in close proximity to each other, and the volume inside the case is also reduced, so that the inside of the case can dissipate heat from lighting lamps and electronic parts. When the lighting lamp and the display box are placed close to each other due to high temperature, the interior of the display box is partitioned and the volume of each is small. Because it is easy to become
There is a problem that the wall surface is melted or deformed. Furthermore, it is only necessary to separate the lighting lamp from the display box, but considering the lighting efficiency, the placement position is often restricted.In such a case, it is necessary to add lighting lamps, and the layout is free. It was a low degree.

Therefore, an object of the present invention is to provide a display device capable of suppressing the vibration of the display unit without hindering the miniaturization of the case and suppressing the heat influence of the illumination lamp on the display box.

[Means for Solving the Problems]

In the present invention, a heat shield wall is provided which is separated from the display box housed in the case and shields the heat dissipation of the illumination lamp, and the back face of the front plate of the display is abutted against the heat shield wall.

[Action]

The heat shield wall provided apart from the display box shields the heat of the illumination lamp and suppresses the deformation of the display box, and the abutment between the heat shield wall and the front plate of the display suppresses the front plate. Therefore, the vibration of the front plate peripheral edge generated by the vibration received from the vehicle is suppressed.

〔Example〕

Hereinafter, a case where one embodiment of the present invention is applied to a vehicle instrument installed in, for example, an automobile will be described as an example.

1 and 2 show an embodiment of the present invention, in which reference numeral 1 denotes a case made of synthetic resin such as ABS or polypropylene having an opening on the front surface. Various display devices 2 for displaying measured quantities such as speed and engine speed are housed and fixed, and a dial (front plate) 3 serving as a display part of these display devices 2 is provided on the front surface of each display device 2 with a screw 4
It is fixed by mounting. A pointer 5 is provided in front of the dial 3 so as to be linked to each of the display devices 2, and the displayed value is read by comparing the pointer 5 with the dial 3.

Reference numeral 6 denotes a display box integrally provided on the bottom wall 1A of the case 1, and the inside of the display box 6 corresponds to various display items such as a gear position display, a fuel shortage alarm, or a direction instruction display. A plurality of illumination chambers 7 are partitioned by partition walls 8 and a display lens 10 fitted in the front opening of the illumination chamber 7 is illuminated and displayed by lighting a display lamp 9 provided at the bottom of each illumination chamber 7. It is a thing.

Reference numeral 11 denotes a circuit board that is attached and fixed to the outer surface side of the bottom wall 1A of the case 1, and has various electronic components (not shown) constituting the drive circuit of the display 2 and the dial plate 3 on its front surface.
The night lighting lamp 12 and the display lamp 9 are mounted, and the bottom wall 1A of the case 1 is provided with an opening 13 through which the lighting lamp 12 and the display lamp 9 are inserted. The display lamp 9 is housed in the display box 6, and the illumination lamp 13 is housed in the case 1 close to both sides of the display box 6.

Reference numeral 14 denotes a heat shield wall provided on both sides of the display box 6 and provided between the display box 6 and the illumination lamp 12. The heat shield wall 14 has a slight gap with the display box 6. The heat shield wall 14 is integrally formed on the bottom wall 1A of the case 1 so as to project.
Thus, the heat radiation of the illumination lamp 12 is blocked to prevent thermal deformation of the display box 6. Further, a contact portion 3A that abuts against the front end portion of the heat shield wall 14 is formed on one side edge of the dial plate 3 so as to protrude laterally, and the back surface of the contact portion 3A is projected to the heat shield wall 14. By hitting, the vibration of the peripheral portion of the dial 3 is suppressed.

In the figure, reference numeral 15 is located in front of the dial 3 and is located in the case 1
This is a lookout plate to be placed in the front opening of the
A display window 16 through which the dial 3 can be visually recognized is formed in the hole 15, and a smoke lens 17 is fitted to the display box 6 in correspondence with the display box 6. Reference numeral 18 denotes a see-through plate that covers the front surface of the case 1.

As described above, in the present invention, the heat shield wall 14 is provided separately from the display box 6, and the heat shield wall 14 prevents the heat deformation of the display box 6 due to the heat dissipation of the illumination lamp 12, and the heat shield wall. By abutting the contact portion 3A of the dial plate 3 against the wall 14 to suppress the vibration of the periphery of the dial plate 3, it is not necessary to provide the case 1 with the dedicated boss portion as in the conventional case. Therefore, the vibration of the peripheral edge of the dial plate 3 can be suppressed without hindering the downsizing of the case 1 itself, and at the same time, the thermal deformation of the display box 6 due to the downsizing can be prevented.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, the dial plate is brought into contact with the front end of the heat shield wall. Although the parts are abutted against each other in a surface contact state, as shown in FIG. 3, a plurality of abutting projections 19 are integrally provided at appropriate intervals from the front end side of the heat shield wall 14. The abutting protrusion 19 may be abutted against the back surface of the abutting portion 3A provided on the dial plate 3 in a point contact state to suppress the vibration of the peripheral portion of the dial plate 3. Further, the display box is not limited to the one provided integrally with the case, and the display box may be formed as a separate body and fixed to the case by screwing. Furthermore, the display unit receives an electric signal from the drive circuit and emits light. A liquid crystal display having a liquid crystal display element for controlling transmission / non-transmission as a display section is housed in a case, and a front plate having a through hole for allowing the display section of the liquid crystal display element to be seen is provided on the front surface of the display, Vibration of the front plate may be suppressed by abutting the peripheral edge of the front plate against the heat shield wall. Also, not only automobile instruments but also motorcycles used in a vibrating atmosphere,
Of course, it can be widely used for small vessels and the like.

[Effect of device]

The present invention is provided with a heat shield wall which is separated from the display box housed in the case and blocks the heat dissipation of the illumination lamp, and the back face of the front panel of the display is abutted against the heat shield wall to reduce the size of the case. (EN) Provided is a display device capable of suppressing vibration of a display unit without disturbing it, preventing heat influence of a display box satisfactorily, arbitrarily selecting an arrangement position of an illumination lamp, and improving layout flexibility. be able to.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. It is a perspective view of a part. 1 ... Case, 2 ... Display unit 3 ... Character plate (front plate), 6 ... Display box 9 ... Display lamp, 12 ... Illumination lamp 14 ... Heat shield wall

Claims (1)

[Scope of utility model registration request] 1. A display device is housed in a case, an illumination lamp is provided for illuminating a display portion of the display device, and a display box for housing a display lamp is arranged in the case in the vicinity of the illumination lamp. In the display device described above, a heat shield wall that blocks the heat radiation of the illumination lamp is provided apart from the display box, and the back face of the front plate of the display is abutted against the heat shield wall. .