JPH0128576Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automobile lamp, and more particularly to an automobile lamp which is provided with a ventilation hole that communicates the interior space of the lamp housing with the atmosphere.

[Conventional technology]

Automotive lamps generally include a light source bulb within a lamp housing, and the lamp housing is covered with a cover or a lens.

In the automotive lamp configured as described above, when the light source bulb is turned on, the air in the lamp housing increases in temperature and expands, and when the light is turned off, it cools and contracts.
For this reason, if the interior space of the lamp housing is completely isolated from the atmosphere, there is a risk that the internal pressure will increase due to the temperature and expansion of the interior air, damaging the components of the lamp.

For this reason, breathing apparatuses have conventionally been provided in automobile lamps.

FIG. 5 is a sectional view showing an example of a breathing apparatus installed in a conventional automobile lamp.

In FIG. 5, 1 is a light source bulb, 2 is a socket for attaching the light source bulb, and 3 is a lamp housing.

A cylindrical case 3a for accommodating the socket 2 is integrally formed in the lamp housing 3.

The space A on the front side of the lamp housing 3 (the side where the light source is provided) is sealed by a lens or a cover (none of which is shown) and is isolated from the atmosphere, but the space A that penetrates the rear wall of the lamp housing 3 to form a nipple 3b, and a U is attached to this nipple 3b.
A tubular grommet 4 is fitted to allow breathing. This grommet 4 prevents water sprayed from the direction of arrow B from entering the lamp housing.

[Problems to be Solved by the Invention] However, when the U-shaped tubular grommet 4 is attached as described above to provide a breathing apparatus, the number of component parts increases, the number of man-hours required for assembly increases, and the cost increases.

The present invention improves the problems of the conventional technology as described above, does not increase the number of component parts, does not increase the number of assembly steps, and even if water is sprayed with strong force from the outside, water does not leak inside. To provide a lighting device for an automobile equipped with a breathing device that is free from the risk of water intrusion and, even if water should infiltrate, water can be drained without adversely affecting the function of the lighting device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a cover that covers the front surface of a lamp housing that is integrally connected with a cylindrical case that houses a light source bulb mounting socket, and also provides a cover that abuts the back surface of the lamp housing. The automotive lamp is provided with a packing that holds the cover in place, and the packing is provided with a cylindrical bulge that fits onto the cylindrical case, and the periphery of the cover is brought into close contact with the packing to be attached to the vehicle body. The vicinity of the base of the cylindrical bulge provided on the packing is configured to have a large diameter to form a gap between the cylindrical bulge and the cylindrical case of the lamp housing, and an opening is formed below the large diameter portion of the cylindrical bulge of the packing. A ventilation hole is provided above the cylindrical case of the lamp housing to communicate the gap with the space on the front side of the lamp housing, and the air gap communicates with the space on the front side of the lamp housing. On the side, there is provided an induction dam that partitions the above-mentioned ventilation hole and the cylindrical case for storing the socket at the upper side, and leads to the outside of the cylindrical case for storing the socket at the lower side. It is characterized by forming a water drainage passage.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 is a cross-sectional side view of one embodiment of the automotive lamp of the present invention, and an enlarged cross-section is drawn along the - line in FIG. 3. Figure 2 is an enlarged view of Figure 1, and Figure 3 is an enlarged view of Figure 1.
The figure is a front view, and FIG. 4 is an exploded perspective view.

3' is a lamp housing, which is integrally formed with a cylindrical case 3a'. 5 is the lamp housing 3'
A cover that covers the front side (light source installation side) of the
It is provided with an opening 5a, into which a lens 6 is fitted.

A cylindrical bulge 7a that fits onto the cylindrical case 3a' is integrally formed on the gasket 7 that brings the back surface of the lamp housing 3' into contact with the vehicle body exterior plate 9, and The periphery of the cover 5 is attached to the vehicle body exterior plate 9 in close contact with the gasket 7. In other words, 8 is a mounting screw, and cover 5
At the same time, the lamp consisting of the cover 5, the lamp housing 3', and the gasket 7 is attached to the automobile exterior plate 9. 10 is Natsu.

A cylindrical bulge 7a provided in the packing 7
The cylindrical case 3 has a large diameter at its base.
A gap C (FIG. 1) is formed between the gap C and a', and an opening 7c is provided below the gap C to allow the gap C to communicate with the atmosphere.

A ventilation hole 3c is provided in a portion where the back surface of the lamp housing 3' faces the gap C and is located above the cylindrical case 3a'.
The ventilation hole 3c allows the gap C to communicate with the internal space D of the lamp housing (the space on the front side of the lamp housing 3').

A plate-shaped induction weir 3d is provided on the front surface of the lamp housing 3'. In other words, this induction weir 3d
As shown in FIGS. 3 and 4, the cylindrical case 3a' surrounds at least a part of the periphery of the cylindrical case 3a', and its upper part partitions between the ventilation hole 3c and the cylindrical case 3a', and its lower part Tubular case for storing sockets 3
Bring it to the outside of a′.

7d is a through hole provided in the packing 7; 7e is a drain groove provided on the back side of the packing 7 that communicates with the through hole at one end and opens at the lower edge of the packing at the other end; 3e is a lower part of the lamp housing 3'. A drainage notch provided around the periphery, 3f a waterproof weir provided at the upper edge of the notch 3e, and 5b a waterproof weir provided on the inner surface of the cover 5, these form a labyrinth-like water drainage passage. There is. Note that the maze-like water drainage passage is not limited to the above embodiment.

In the automotive lamp of the present invention constructed as described above, the interior space D of the lamp housing 3' is communicated with the atmosphere through the ventilation hole 3c, the gap C, and the opening 7c, so that it can be used even when the light source bulb 1 blinks. The interior space D of the lamp housing is always kept equal to atmospheric pressure.

Moreover, the route from the opening 7c to the ventilation hole 3c is as follows:
Since there is a cylindrical case 3d' in the middle, even if water is sprayed as shown by arrow E (Fig.
There is very little risk of flooding, and even if a small amount of water were to enter, the water would be guided by the induction weir 3d and flow into the case 3a housing the socket 2 of the light source bulb 1. The water that flows downward without any movement and flows down through the induction weir 3d flows out from the labyrinth-shaped drain passage. This labyrinth-shaped drainage passageway is intended to prevent water from entering the lamp during car washing.

[Effect of idea]

As detailed above, the present invention does not increase the number of component parts or the number of man-hours required for assembly, and also eliminates the risk of water entering the interior even if water is sprayed with strong force from the outside. To provide an automobile lamp equipped with a breathing device that can drain water without adversely affecting the function of the lamp even if water enters the lamp.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of the automotive lamp of the present invention, and the cross section is drawn along the - line in FIG. 3. 2 is an enlarged view of a portion of FIG. 1, FIG. 3 is a front view of the above embodiment, and FIG. 4 is an exploded perspective view. FIG. 5 is a cross-sectional view of an example of a vehicle lamp equipped with a conventional breathing apparatus. 1...Light source bulb, 2...Bulb mounting socket,
3'...Lamp housing, 3a'...Cylindrical case, 3
c...Vent hole, 3d...Induction weir, 3e...Notch, 3f...
Waterproof weir, 5... Cover, 5a... Opening, 5b... Waterproof weir, 6... Lens, 7... Packing, 7a... Cylindrical bulge, 7c... Opening, 7d... Through hole, 7e... Drainage groove,
9...Vehicle body exterior plate, 10...Nuts.

Claims (1)

[Scope of utility model registration request] A cover is attached to cover the front surface of a lamp housing in which a cylindrical case for storing a light source bulb mounting socket is integrally connected, and a packing is provided that comes into contact with the back surface of the lamp housing, and the packing is provided with a cover that covers the front surface of the lamp housing. In the automobile lamp, which is provided with a cylindrical bulge that fits externally into the case and is attached to the vehicle body by bringing the circumferential edge of the cover into close contact with the packing, the vicinity of the root of the cylindrical bulge provided in the packing is It is configured to have a large diameter to form a gap between it and the cylindrical case of the lamp housing.
An opening is provided below the large diameter portion of the cylindrical bulge of the packing to communicate the gap with the atmosphere, and a ventilation hole is provided above the cylindrical case of the lamp housing to connect the gap to the atmosphere. The lamp housing communicates with the space on the front side of the housing, and is provided on the front surface of the lamp housing, with an upper part partitioning between the ventilation hole and the socket storage cylindrical case, and a lower part extending to the outside of the socket storage cylindrical case. A lighting device for an automobile, characterized in that a closed induction weir is provided, and a labyrinth-shaped drainage passage is formed at the bottom of the lighting device.