JP3760794B2 - Lamp structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp structure, and more particularly to a lamp structure that has been devised in the manner of mounting an inner housing.
[Prior art]
A lamp of an automobile has a structure in which a bulb and an inner housing are housed in a lamp chamber formed by closing an opening of an outer housing with a cover (see JP-A-11-329020 as a similar technique). The inner housing is attached to the outer housing in the lamp chamber, and has various structures such as a reflector shape and a combination of inner lenses according to applications.
[0003]
A breathing hole is formed in the back wall of the outer housing to prevent the inside of the lamp chamber from being sealed and to prevent the cover from being fogged. In order to prevent water from entering the inside of the lamp chamber from this breathing hole, the tip of the breathing hole is covered with a waterproof cap having a structure that allows only the passage of air, or the periphery of the breathing hole is insulated. Waterproofing measures are enclosed by walls.
[0004]
The inner housing is attached to the outer housing by a screw screwed from the back wall of the outer housing through a waterproof seal washer.
[0005]
[Problems to be solved by the invention]
However, in such a conventional technique, a waterproof seal washer is required to mount the inner housing, which increases the number of parts.
[0006]
Further, since the inner housing inside the outer housing is fastened to the outer housing by a screw screwed in from the back wall side of the outer housing, the mounting portion of the inner housing is not visible to the operator, which is very disadvantageous in terms of workability. It is. In addition, the work is very difficult because the work is performed with the seal washer interposed.
[0007]
The present invention has been made by paying attention to such a conventional technique, and provides a lamp structure that does not require waterproofing parts and has good workability for mounting an inner housing.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a lamp structure in which the opening of the outer housing is closed with a cover to form a lamp chamber in which the bulb and the inner housing are housed, and a breathing hole is formed in the back wall of the outer housing, A protrusion projecting inward is formed on a part of the breathing hole, and an engagement rib having a claw that can be engaged with the protrusion of the breathing hole is formed on the back surface portion corresponding to the breathing hole of the inner housing. Then, by inserting the claw portion of the engagement rib into the breathing hole and engaging the claw portion with the protrusion, the inner housing is fixed to the outer housing, and the two pairs of the breathing hole and the engagement rib are provided. A positioning rib to be inserted into the breathing hole is formed on the back surface portion of the inner housing so that the one claw portion and the other claw portion face each other. Ahead But in a direction different from the direction of the claw portions was unsuitable opposite directions, characterized by a portion abutting the breathing hole.
[0009]
According to the first aspect of the present invention, the inner housing can be attached simply by forming a protrusion in the existing breathing hole and engaging the engaging rib formed on the inner housing. It is not necessary to interpose waterproof parts, and the number of parts can be reduced. Also, simply by inserting the inner housing from the opening side of the outer housing, the engagement rib is inserted into the breathing hole and the installation is completed, so that the work is easier compared to the conventional work from the back side of the outer housing. It is. Further, since the engaging forces of the claw portions formed on the two engaging ribs act in directions opposite to each other, it is difficult to come off even if an external force such as vibration is applied to the inner housing. Further, due to the contact between the positioning rib and a part of the breathing hole, the leading end of the positioning rib is strictly in a direction (vertical direction) different from the direction of the nail portions facing the opposite sides (for example, the horizontal direction). Positioning can be performed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. This embodiment relates to a rear combination lamp 1 installed on both the left and right sides of the rear part of an automobile. In this embodiment, only the left rear combination lamp 1 is shown as a representative.
[0015]
In this rear combination lamp 1, a cover 3 is attached to an opening 2a of an outer housing 2 to form a lamp chamber 4, and a bulb 5 for a back lamp and a bulb for a tail / stop lamp are provided in each lamp chamber 4 from below. 6. A bulb 7 for a turn signal lamp is installed. Further, an inner housing 16 described later is housed in the lamp chamber 4.
[0016]
Cylindrical breathing holes 8 and 9 are formed on the back wall of the outer housing 2 in the vertical direction. The breathing holes 8 and 9 are not only vertically separated but also separated in the left-right direction. The tip of the breathing holes 8 and 9 is covered with a rubber cap 10 for waterproofing. A slit 11 (see FIGS. 3 and 4) that goes out from the cap 10 is formed in the lower part of the breathing holes 8 and 9, and the slit 11 communicates the internal space of the lamp chamber 4 to the outside. Further, water-impervious walls 12 and 13 are integrally formed around the breathing holes 8 and 9 so that water does not approach the breathing holes 8 and 9.
[0017]
Then, at the entrance of the breathing holes 8 and 9 on the side of the light chamber 4, protrusions 14 and 15 facing in opposite directions in the left-right direction are formed so as to protrude somewhat toward the inner side of the breathing holes 8 and 9. Has been. That is, a protrusion 14 is formed on the right side of the upper breathing hole 8 as viewed from behind, and a protrusion 15 is formed on the left side of the lower breathing hole 9. Note that the upper protrusion 14 wraps around not only on the right side but also on the upper side of the breathing hole 8 (see FIG. 4).
[0018]
Each of the bulbs 5, 6, 7 installed in the lamp chamber 4 is partitioned by reflectors 17, 18, 19 formed in the inner housing 16 of the lamp chamber 4. An inner lens 20 is also attached to each reflector 17, 18, 19.
[0019]
The inner housing 16 has a shape substantially corresponding to the outer housing 2, and engaging ribs 21 and 22 are formed at portions corresponding to the breathing holes 8 and 9 on the back surface thereof. These engagement ribs 21 and 22 have a length that can be inserted into the breathing holes 8 and 9. A claw portion 23 is formed on the tip of the upper engagement rib 21 on the side corresponding to the protrusion 14 of the upper breathing hole 8, and a claw on the opposite side is formed on the tip of the lower engagement rib 22. A portion 24 is formed. Further, positioning ribs 25 that can be inserted into the corresponding breathing holes 8 are also formed at positions adjacent to the upper engaging ribs 21.
[0020]
The inner housing 16 is attached to the outer housing 2 before the cover 3 is attached by setting the inner housing 16 from the opening 2a, and the engaging ribs 21 and 22 and the positioning ribs 25 are connected to the corresponding breathing holes. It only needs to be inserted into the holes 8 and 9. If it does so, the nail | claw parts 23 and 24 of each engagement rib 21 and 22 will engage with the projection parts 14 and 15 of the breathing holes 8 and 9, and the attachment state with respect to the outer housing 2 will be obtained. In this manner, simply by inserting the inner housing 16 from the opening 2a side of the outer housing 2, the engaging ribs 21 and 22 are inserted into the breathing holes 8 and 9 to complete the mounting. Compared to the work from the back side, the work is easy.
[0021]
In the mounted state, the abutting portion 26 (see FIG. 5) on the peripheral edge of the inner housing 16 abuts on the peripheral edge of the outer housing 2, and the claw portions 23 and 24 are behind the protrusions 14 and 15 in the breathing holes 8 and 9. Therefore, the inner housing 16 is securely attached with a fastening force corresponding to the elastic engagement force between the claw portions 23 and 24 and the projecting portions 14 and 15.
[0022]
In addition, since the claw portions 23 and 24 and the protrusions 14 and 15 face away from each other in the left-right direction, the engaging force of both acts in a state of pulling each other in the left-right direction, and the inner housing 16 Even if external force such as vibration is applied, it is difficult to come off.
[0023]
Further, simultaneously with the engagement of the claw portions 23, 24 and the projection portions 14, 15, the upper positioning rib 25 comes into contact with the projection portion 14 that has turned around the upper surface of the upper breathing hole 8. In addition, the inner housing 16 can be attached to the outer housing 2 with an accurate positional accuracy.
[0024]
As described above, according to this embodiment, the protrusions 14 and 15 are formed in the existing breathing holes 8 and 9, and the engagement ribs 21 and 22 formed on the inner housing 16 are engaged therewith, Since the inner housing 16 can be mounted, there is no need to interpose a conventional waterproof countermeasure component (such as a seal washer), and the number of components can be reduced.
[0025]
In the above embodiment, the combination lamp 1 on the rear side is taken as an example, but it may be on the front side or a headlamp other than the combination lamp 1.
[Brief description of the drawings]
FIG. 1 is a rear view showing a rear combination lamp according to an embodiment of the present invention.
2 is an exploded perspective view of FIG. 1. FIG.
3 is a cross-sectional view taken along the line SA-SA shown in FIG.
4 is a cross-sectional view taken along line SB-SB in FIG.
5 is a cross-sectional view taken along the line SC-SC shown in FIG.
[Explanation of symbols]
1 Rear combination lamp (lamp)
2 Outer housing 2a Opening 3 Cover 4 Light chamber 5, 6, 7 Valve 8, 9 Breathing hole 14, 15 Protrusion 16 Inner housing 21, 22 Engaging rib 23, 24 Claw 25 Positioning rib

Claims (1)

A lamp structure in which the opening of the outer housing is closed with a cover to form a lamp chamber in which the bulb and the inner housing are housed, and a breathing hole is formed in the back wall of the outer housing,
A protrusion projecting inward is formed on a part of the breathing hole, and an engagement rib having a claw that can be engaged with the protrusion of the breathing hole is formed on the back surface portion corresponding to the breathing hole of the inner housing. And
The inner housing is fixed to the outer housing by inserting the claw portion of the engagement rib into the breathing hole and engaging the claw portion with the protrusion ,
The breathing hole and the engagement rib are formed in two sets so that one claw part and the other claw part face each other,
A positioning rib to be inserted into the breathing hole is formed on the back surface portion of the inner housing, and the tip of the positioning rib has a direction different from the direction of the nail portions facing opposite sides of the breathing hole. A lamp structure, wherein the lamp structure is in contact with a portion .

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