JPH0317341Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a display device installed in instruments for vehicles, ships, or agricultural machinery.

[Prior Art] In general, vehicles such as motorcycles display the operating status of the turn signal, the gear position, the up/down status when the headlights are on, and the oil pressure status of the engine. A display device for the driver to recognize is attached to the vehicle body together with indicating instruments such as a speedometer and a tachometer. The lower housing 1A is a housing 1 made of synthetic resin or the like for a display device that is attached to the main body of the display device separately from the indicator.
and the upper housing 1B.
The lower housing 1A is provided with a partition wall 3 that partitions the same number of lighting chambers 2 as the number of display items of the various vehicle displays, and each lighting room 2 is partitioned by the partition wall 3. 4 is attached, and a ventilation hole 9 is formed in the bottom wall of each illumination chamber 2, and a colored display plate 5 is fitted into the surface side of each illumination chamber 2. In addition to being colored, the display board 5 may also be printed with characters, symbols, etc. corresponding to each of the display items.

If the coloring of the display board 5 is set to be different for each display item, the display board 5 is fitted in each lighting room 2 as shown in Fig. 6, but if the coloring of all display items is the same, As shown in FIG. 7, a single display board 5A colored in one color may be used for both purposes.

Each illumination chamber 2 is provided on the surface side of each display board 5, 5A.
The partition frame 7 is connected to the display panels 5, 5A, the partition wall, and the front surface of the display panels 5, 3 so that a display window 6 is formed in which each display item is independently illuminated by the irradiation light from the illumination lamp. It is placed in contact with the The front surface of the partition frame 7 is covered with a transparent plate 8 such as a transparent resin plate or a smoked plate, and in this case, the transparent plate 8 is assembled integrally with the lower housing 1A when the upper housing 1B is molded. There is.

Therefore, in response to a malfunction in each part of the vehicle or the operation of various vehicle equipment, the illumination light 4 lights up, and the display window 6 of the display board 5, 5A corresponding to the installation position of the illumination light 4 stands out brightly. The driver can clearly see the displayed state.

Incidentally, in such a display device, the display state can be determined by irradiating the display panels 5, 5A with a beam of light from the illumination lamp 4 in the lower housing 1A, and thereby visually reading the display window 6 that stands out brightly. In this case, when the illuminating lamp 4 is irradiated, the heat of the irradiated light from the illuminating lamp 4 is accumulated in the illuminating room 2 in which the illuminating lamp 4 is installed, but this heat is transferred to the illuminating room 2.
It is radiated to the outside through a ventilation hole 9 formed in the bottom wall of the.

However, since the display chamber 10 formed between the display plate 5 and the transparent plate 8 above each illumination chamber 2 is completely blocked off from the outside of the display device, the display device may be affected by temperature changes in the external atmosphere of the display device. Due to the influence of temperature on the internal atmosphere, the water vapor contained in the atmosphere reaches the dew point under certain conditions, particularly on the front and back surfaces of the transparent plate 8 which is arranged to face both the external atmosphere and the internal atmosphere at the same time. , a so-called clouding phenomenon occurs in which water droplets adhere to the surface, especially in the display chamber 10.
Visibility of the displayed state by the illumination lamp 4 through the see-through plate 8 is reduced due to water particles that adhere to the inside of the screen and cannot be wiped away from the outside.

More specifically, when the temperature of the external atmosphere falls below the temperature of the display chamber 10, the temperature of the display chamber 10 gradually changes to follow the changed temperature of the external atmosphere. The inside of the display chamber 10, which is provided in the external atmosphere of the device through the upper housing 1B and the transparent plate 8, follows changes in the external temperature in a relatively short period of time and is lowered, so that the water vapor contained in the display chamber 10 is lowered. is cooled and reaches a saturated state, reaching the so-called dew point and a kind of gas liquefaction phenomenon occurs, turning into water droplets and flowing into the display chamber 10.
It adheres to the inside of the transparent plate 8 and the back surface of the transparent plate 8, and has the aspect that the visibility of the display state of the display device is reduced.

Therefore, a lamp indicator device was developed in 1983-83682 that communicated the inside and outside of a sealed display room with a display board and a see-through board to minimize the temperature difference with the outside temperature.
It is known from the publication number etc. This has multiple ribs protruding from the rear surface of the front cover such as a see-through plate.
These ribs are brought into contact with the outside air through ventilation holes formed between the ribs, so that the air can circulate.

[Problem to be solved by the invention] In the conventional example described above, ventilation is achieved between the inside and outside of the display room through the ventilation section formed between the ribs, and although the structure is such that clouding of the front cover is unlikely to occur, the ventilation Since the structure directly communicates the outside and outside of the display chamber through the ventilation section, there is a risk of dust entering the display chamber directly through the ventilation section, especially when this type of device is placed directly exposed to the outside of a motorcycle etc. It is easy for dust, rainwater, etc. to enter the display chamber due to wind entrainment phenomenon while driving.For this reason, in the above conventional example, although the clouding phenomenon can be suppressed, the dust and rainwater that have entered the display chamber are more likely to enter the display chamber. There was a problem in that water droplets etc. adhered to the back surface of the front cover, resulting in poor visibility.Additionally, ribs and ventilation sections were visible through the front cover, spoiling the exterior design, which caused problems in terms of exterior design.

The present invention solves the above-mentioned problems and prevents the clouding of display system members, especially the inner surface of the transparent plate, due to the adhesion of water droplets to the display chamber of the display device, and the intrusion of dust into the display chamber. It is an object of the present invention to provide a display device that can prevent such problems, improve visibility, and maintain a good external design.

[Means for Solving the Problems] In the present invention, a housing having an open display surface is partitioned by a partition wall to form lighting rooms, a lighting lamp is installed in each lighting room, and a bottom of each lighting room is installed. A ventilation hole is formed in the wall, a display board is provided on the display surface of each lighting room, a partition frame that covers at least the partition wall is provided in front of the display board, and a space is provided in front of the display board. In the device in which a see-through plate is disposed on a display chamber formed by placing the display panel, a gap is formed between the partition frame and the display plate, and the display plate and the partition wall are hidden by the partition frame. A communication hole for communicating the display chamber and the illumination chamber is provided in at least one of the display chamber and the illumination chamber.

[Example] Hereinafter, an example of the present invention will be described using the same reference numerals for the same parts as in FIGS. 5 to 7. FIG.
FIG. 2 shows a first embodiment of the present invention, in which a colored display board 5 is provided on the surface side of each illumination room 2 in which a housing 1 with an open display surface is partitioned by a partition wall 3. is arranged on the partition wall 3 and fitted into the lower housing 1A, and in addition to being colored, the display board 5 is also printed with characters, symbols, etc. corresponding to each display item.

At least the partition wall 3 is placed above the display panel 5.
covering the front side of the display board 5 at a position corresponding to
A partition frame 7 is provided to clearly separate the display board 5, and the partition frame 7 is assembled integrally with the upper housing 1B so as to provide a gap 12 with the display board 5 when the upper housing 1B is molded. At the same time, a see-through plate 8 such as a smoked board or a transparent resin board that can visually read the display board 5 is disposed on the upper part of the upper housing 1B. It is assembled integrally with the upper housing 1B during molding of the housing 1B, and covers the display panel 5.

Further, a display window 6 is formed by the partition frame 7, and the display board 5 is formed so as to be visible through the display window 6. A communication hole 11 made of a transparent hole is formed in a portion of the display board 5 covered by the partition frame 7, and a display chamber 10 formed between the display board 5 and the transparent board 8 and each of the illumination chambers 2 are formed. This is what keeps it in communication.

Therefore, the illumination lamp 4 is turned on by a signal from a detection unit (not shown) that is a display target of various vehicles, and the display board 5 is illuminated by the light beam of the illumination lamp 4, and the display board 5 is colored. appears bright and stands out, and the operating status of the vehicle equipment can be easily read from the display window 6.

In such a case, a communication hole 11 is formed in the display board 5, and a display chamber 1 formed between the display board 5 and the transparent board 8 is formed.
0 and the illumination chamber 2 are in communication, and the illumination chamber 2 is in communication with the outside via the ventilation hole 9, that is, the display chamber 10 is in communication with the external atmosphere of the display device. Even if the external atmosphere changes, the internal atmosphere of the display chamber 10 changes in synchrony with the change in the external atmosphere through the illumination chamber 2, so that the water vapor in the display chamber 10 reaches the dew point under certain conditions, and water drop particles As a result, it is possible to prevent the occurrence of a cloudy phenomenon adhering to the transparent plate 8.

In this way, by forming a flow path that communicates the internal atmosphere of the display chamber 10 and the external atmosphere via the display device, particularly the illumination chamber 2, the internal atmosphere of the display chamber 10 caused by changes in the external atmosphere of the display device can be prevented. It is possible to suppress the temperature difference with the atmosphere and prevent clouding on the transparent plate 8, and also to prevent the display chamber 10 from becoming cloudy.
Because of the structure in which the air and the outside air communicate indirectly through the illumination chamber 2, there is no fear that dust or rainwater will directly enter the display chamber 10, and the adhesion of such dust to the transparent plate 8 is prevented. This is something that can be prevented.

In addition, since the communication hole 11 is formed in a location covered by the partition frame, when visually read from the transparent plate 8 in the display state and the non-display state, the communication hole 11 is formed in the part covered by the partition frame 7. Since the display device is blindfolded, the appearance of the display device is improved.

3 and 4 show a second embodiment of the present invention, in which a colored display board 5 on the surface side of each illumination chamber 2 is fitted into a step 3A at the top of the partition wall 3. At the same time, above the display panel 5, a partition frame 7 that clearly separates the display panel 5 is arranged on the protrusion 3B of the partition wall 3, and is fitted into the upper housing 1B with a gap 12 provided therebetween.

A communication hole 11A consisting of a notch is formed in the stepped portion 3A of the partition wall 3, so that the display chamber 10 formed between the display panel 5 and the transparent plate 8 and each of the illumination chambers 2 are in communication with each other. It is something.

Therefore, as in the first embodiment described above, the internal atmosphere of the display chamber 10 and the external atmosphere are communicated through the circulation path formed by the ventilation hole 9, the illumination chamber 2, and the communication hole 11A, so that the external atmosphere of the display device is Due to this change, the temperature difference between the display chamber 10 and the internal atmosphere can be suppressed, the clouding phenomenon on the transparent plate 8 can be prevented, and the intrusion of dust into the display chamber 10 can be suppressed. .

The number and shape of the communicating holes 11 and 11A may be appropriately selected depending on the size of the lighting room 2 and the amount of heat generated by the lighting lamp 4.

[Effects of the invention] As described above, the invention forms a lighting room by partitioning a housing with an open display surface by a partition wall.
A lighting lamp is installed in each lighting room, a ventilation hole is formed in the bottom wall of each lighting room, and a display board is provided on the display surface of each lighting room, and at least the partition wall is provided in front of the display board. A partition frame is disposed to cover the display panel, and a see-through plate is disposed on a display chamber formed at a distance in front of the display panel, in which a gap is formed between the partition frame and the display panel. By providing a communication hole for communicating the display room and the illumination room in at least one of the display board and the partition wall that are hidden by the partition frame, the display device is prevented from changing due to temperature changes in the external atmosphere. In particular, it prevents the condensation of water vapor in the internal atmosphere of the display chamber, and prevents the phenomenon of spiders forming on the inner surface of the transparent plate 8 for visually reading the display of the display device.
Moreover, it is possible to provide a display device that can suppress the intrusion of dust into the display chamber, maintain good visibility, and improve the appearance design.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a partially enlarged overall sectional view, FIG. 2 is a plan view of FIG. 1, and FIG. 4 shows a second embodiment of the present invention, FIG. 3 is a perspective view of the main parts, FIG. 4 is a partially enlarged overall sectional view, and FIGS. 5 to 7 shows a conventional example, Fig. 5 is an overall plan view applied to a vehicle instrument, Fig. 6 is a sectional view showing a conventional display device, and Fig. 7 is a sectional view showing another conventional display device. It is a diagram. 1... Housing, 2... Lighting room, 3... Partition wall, 4... Lighting lamp, 5, 5A... Display board, 7...
Partition frame, 8... Investment board, 9... Ventilation hole, 10...
Display chamber, 11, 11A...Communication hole, 12...Gap portion.

Claims (1)

[Scope of utility model registration request] A housing with an open display surface is divided by a partition wall to form lighting rooms, lighting lamps are installed in each lighting room, ventilation holes are formed in the bottom wall of each lighting room, and each lighting room is provided with a ventilation hole. A display board is provided on the display surface of the display board, a partition frame that covers at least the partition wall is provided in front of the display board, and a see-through board is provided on the display chamber formed at intervals in front of the display board. A gap is formed between the partition frame and the display board, and the display room and the lighting room are provided in at least one of the display board and the partition wall that are hidden by the partition frame. A display device characterized by providing a communicating hole.