JPH0345263Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention provides a display board having a light transmitting part in the opening of a synthetic resin case, and the display board is illuminated by lighting an internal lamp. The present invention relates to a ventilation device in a display device that displays images by illumination.

(Prior Art) This type of display device has been used in the field of displaying abnormality warnings for vehicles, for example, and as the display items have become more diverse, the devices have been made smaller and more centralized.

FIG. 5 shows the general structure of this type of display device, in which a synthetic resin case 1 is divided into a plurality of rooms 2 according to display items, and a lamp 3 is arranged inside each room 2. A light-transmissive display plate 4 disposed in the opening of the case 1 is used for illumination display.

By the way, the heat generated by lighting the lamp 3 is considerable, and since the capacity of each room 2 is small, the case 1 is likely to be thermally deformed by the direct heat of the lamp 3. For this reason, for example, as disclosed in Japanese Utility Model Application Publication No. 59-168782, a metal heat shield plate 5 is provided between the lamp 3 and the inner wall of each room 2 to prevent thermal deformation of the case 1 due to direct heat. It is prevented. Also, room 2
In order to suppress the temperature rise inside, a ventilation hole 6 is provided in the bottom of the case 1 for each room 2, as disclosed in Japanese Utility Model Publication No. 56-16544, for example. In order to prevent dust, etc. from entering the case 1 from the case 6 due to the wind and rain being caught in or depending on the direction, a barrier 7 and a dust shielding plate 8 may be provided inside and outside the case 1 to cover the ventilation hole 6. .

(Problems to be Solved by the Invention) By the way, when the case 1 is molded, the outer barrier 7 of the case 1 is molded integrally with the case 1, but the inner dust shielding plate 8 is located at the same position as the barrier 7. Since they overlap, they cannot be integrally molded, and a dust shielding plate 8 made of another member must be attached later. However, as the number of display items increases and the centralization is attempted, the capacity of room 2 becomes narrower, and a dust shield plate 8 is placed on the bottom of the elongated case 1.
There were problems in that the work of attaching the dust shielding plate 8 became very complicated and the number of parts of the dust shielding plate 8 increased.

The present invention has been made based on the above-mentioned problems, and an object of the present invention is to provide a ventilation device for a display device that allows easy installation of a dust shielding plate that prevents dust from entering through the ventilation holes. be.

[Structure of the idea]

(Means for solving the problem) The present invention stores a lamp in a synthetic resin case that has a ventilation hole on the bottom and a display board on the top opening, and when the lamp is turned on, the above-mentioned display is displayed. In the display device that illuminates the board, a metal heat shield plate is disposed between the inner wall of the case and the lamp, a dust shield plate is formed at the lower end of the heat shield plate to cover the ventilation hole, and the metal heat shield plate is disposed between the inner wall of the case and the lamp. This prevents dust from entering through the pores.

(Function) The dust shield plate is pre-formed at the lower end of the heat shield plate, and when the heat shield plate is installed inside the synthetic resin case,
A dust shield plate can also be installed at the same time.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 and 2 show a first embodiment of the present invention, and the basic structure of the display device is the same as the conventional device shown in FIG. A synthetic resin case 1 is divided into a plurality of rooms 2 according to display items, and a lamp 3 is housed in each room 2 to illuminate a display board 4 disposed in an opening.

Reference numeral 5 denotes a metal heat shield plate, which is formed by bending a flat metal plate to form a cylindrical shape so as to be inserted along the inner wall of the room 2, and protects the case 1 from the direct heat of the lamp 3.

The lower end of this heat shield plate 5 is bent inward so as to be approximately parallel to the bottom surface of the case 1, and is provided with a ventilation hole 6, which will be described later.
A dust shielding plate 8 is formed to cover the.

An appropriate number of ventilation holes 6 are provided at the bottom of the case 1 to allow air circulation inside and outside the room 2.
This prevents the inside from overheating. A barrier 7 is integrally formed on the outside of the bottom of the case 1 substantially parallel to the bottom so as to cover the ventilation hole 6 from the outside, thereby preventing dust from entering through the ventilation hole 6. Also, case 1
A plurality of protrusions 9 or flanges are integrally formed protruding near the ventilation hole 6 on the inside of the bottom portion, and the dust shielding plate 8 is placed thereon, and the dust shielding plate 8 is placed above the ventilation hole 6 to close the ventilation hole 6. This prevents dust from entering the interior.

In this way, the present invention is constructed by bending and forming the dust shield plate 8 at the lower end of the heat shield plate 5.
When the heat shield plate 5 is installed in the room 2, the dust shield plate 8 is also installed at the same time. Therefore, the complicated work of attaching the dust shield plate 8 deep inside the narrow room 2 as in the conventional method is unnecessary, and since it is formed integrally with the heat shield plate 5, the number of parts can be reduced.
The dust shielding plate 8 formed by this bending is placed on the protrusion 9 and covers the ventilation hole 6 from above so as not to directly close the ventilation hole 6 from inside, so that the circulation with the outside air is prevented. It is possible to prevent dust from entering.

3 and 4 show a second embodiment of the present invention, in which the same parts as those in the previous embodiment are denoted by the same reference numerals. Two parallel notches 10 are provided at an interval larger in diameter than 6, and the portion between these notches 10 is bent inward to form a dust shielding plate 8A. Since this dust shielding plate 8A has a part of the heat shielding plate 5 bent, it is one step higher than the heat shielding plate 5. Therefore, the dust shielding plate 8A is not provided with the protrusion 9 in the previous embodiment, but is viewed from above by facing the ventilation hole 6. Can be covered. Therefore,
The protrusion 9 is not required, and the installation work becomes easier.

Although the embodiments of the present invention have been described above in detail, modifications can be made as appropriate within the scope of the gist of the present invention. For example, the barrier 7 formed integrally with the case 1 may not be provided, and the shape is not limited. Moreover, it is applicable not only to two-wheeled vehicles but also to those used in an external atmosphere such as agricultural machinery. Furthermore, the dust shielding plates 8, 8A
Although the heat shield plate 5 is formed by bending the heat shield plate 5, it can also be fixed to the heat shield plate 5 by other methods such as welding.

[Effect of idea]

As detailed above, according to the present invention, by integrally forming a dust shield plate that covers the ventilation holes near the lower end of the heat shield disposed inside the synthetic resin case, the installation of the heat shield plate can be easily performed. Since a dust shielding plate is also installed at the same time, it is possible to provide a ventilation device for a display device in which the dust shielding plate can be attached very easily.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the first embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a sectional view showing the second embodiment, and Fig. 4 is a perspective view of the same essential parts from below. , 5th
The figure is a sectional view showing a conventional example. 1...Synthetic resin case, 2...Room, 3...
Lamp, 4...display board, 5...heat shield plate, 6...ventilation hole, 8, 8A...dust shield plate.

Claims (1)

[Scope of utility model registration request] In a display device in which a lamp is housed in a synthetic resin case having a ventilation hole at the bottom and a display board disposed in an opening at the top, and the display board is illuminated by lighting the lamp, the inner wall of the case a metal heat shield plate is disposed between the lamp and the lamp, and a dust shield plate is formed at the lower end of the heat shield plate to cover the ventilation hole;
A ventilation device for a display device, characterized in that it prevents dust from entering through the ventilation hole.