JPH0568005U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] The seal holding part is structurally strengthened, and the rear part does not expand outward even if the housing is thermally deformed by the heat when the valve is turned on, and the sealing performance is impaired. The seal member will not come off and the seal member will not come off when the cap is assembled.
It is intended to provide a vehicular lamp in which the dimension L between the rear surface portion of the housing and the end surface portion of the cap is reduced. [Structure] A seal holding portion 5 is formed in an opening 2 provided at a rear portion of a housing 1, and the seal holding portion 5 is projected to a back surface portion 5a and an end portion of the back surface portion 5a in a direction perpendicular thereto. The back surface portion 1a of the housing 1 is connected to a portion of the back surface portion 5a corresponding to the center O of the seal holding portion 5, which is composed of a plurality of engaging protrusions 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular lamp in which a housing is strengthened at a fitting portion with a cap and sealing performance is improved.

[0002]

[Prior Art]

 Conventionally, in a vehicle lamp used for a headlight of an automobile, a lamp body is composed of a housing and a lens, a lamp and a reflector are housed in the housing, and a lens is hot in an opening of the housing. Liquid-tightly adhered by melt.

As shown in FIG. 4, an opening 21 used for valve replacement is formed in the rear portion of the housing 20, and a cap 22 is detachably fitted in the opening 21. The opening 21 is provided with an annular seal holding portion 23. The seal holding portion 23 has a back surface portion 24 and a plurality of engaging projections projecting at an end portion of the back surface portion 24 in a direction perpendicular thereto. The housing 20 is formed integrally with the housing 20, and the rear surface portion 20a of the housing 20 is connected to the end of the rear surface portion 24 of the seal holding portion 23.

Then, after the seal member 30 is fitted into the seal holding portion 23 of the housing 20, the engaging protrusion 27 of the cap 22 is inserted into the insertion portion of the seal holding portion 23, and the tubular portion 28 of the cap 22 is inserted. Is inserted and the cap 22 is rotated, so that the engaging protrusion 27 is superposed on the engaging protrusion 25, and the seal holding portion 23 is inserted between the flange 29 of the cap 22 and the engaging protrusion 27. The seal member 30 is accommodated and accommodated in a compressed state between the seal holding portion 23, the collar portion 29, and the tubular portion 28, and the cap 22 is attached to the housing 20.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technique, since the rear surface portion 20a of the housing 20 is connected to the end portion of the rear surface portion 24 of the seal holding portion 23, the housing 20 is thermally deformed by the heat when the valve is turned on, and There is a problem in that the back surface portion 24 expands outward as shown by the broken line, and the sealing performance is impaired.

Further, since the rear surface portion 25 of the housing 20 is connected to the end portion of the rear surface portion 24 of the seal holding portion 23, the span 32 of the portion 32 inside the connecting portion 31 is shortened, and the cap 22 of the cap 22 is At the time of assembly, the portion 32 does not bend and the seal member 30 may come off, and the dimension L between the rear surface portion 20a of the housing 20 and the end surface portion 22a of the cap 22 becomes large. there were.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention that the seal holder is structurally reinforced so that the housing is heated by the heat at the time of lighting the valve. Even if it is thermally deformed, the rear surface portion does not spread outward, the sealing performance is not impaired, and this portion does not bend and the sealing member does not come off when the cap is assembled. It is an object of the present invention to provide a vehicular lamp in which the dimension L between the rear surface portion of the housing and the end surface portion of the cap is reduced.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a vehicle in which an opening used for valve replacement is formed in a rear portion of a housing, and a cap is detachably fitted to the opening via a seal member. In a lighting device, a seal holding portion is formed in an opening provided at a rear portion of a housing, and the seal holding portion is provided at a rear surface portion and at an end portion of the rear surface portion, and a plurality of engagements projecting at right angles thereto. It is characterized in that it is composed of a projection portion, and the rear surface portion of the housing is connected to a portion of the rear surface portion corresponding to the center O of the seal holding portion.

[0009]

[Action]

 With such a structure, the seal holding portion is structurally strengthened, so that even if the housing is thermally deformed by the heat when the bulb is lit, the rear surface portion does not spread outward and the sealing performance is impaired. The span on the inner side of the connecting part where the rear part of the housing on the rear part is connected becomes longer, and this part does not bend and the seal member does not come off when the cap is assembled. The dimension L between the rear surface portion of the housing and the end surface portion of the cap is reduced.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a rear portion of a vehicular lamp according to an embodiment of the present invention.

The vehicular lamp according to the present invention comprises a housing 1, a bulb (not shown) provided at the center of the housing 1, and a lens (not shown) provided at the front opening of the housing 1. ..

An opening 2 used for valve replacement is formed in the rear portion of the housing 1, and a cap 3 is detachably fitted in the opening 2.

A seal member mounting portion 4 is formed in the opening 2. The seal member mounting portion 4 is provided with an annular seal holding portion 5. The seal holding portion 5 has a back surface portion 5a and a plurality of engagements projecting at right angles to the end portion of the back surface portion 5a. The protrusion 6 is formed integrally with the housing 1. The center of the seal holding part 5 (when the seal member 13 is held by the seal holding part 5 is aligned with the center P of the seal member 13) The rear surface portion 1a of the housing 1 is connected to approximately the center of the rear surface portion 5a corresponding to O. Further, an insertion portion 7 is formed between the engaging protrusions 6.

As shown in FIG. 2, the cap 3 is provided with a cap-shaped cap main body 8, and a flange 9 of the cap main body 8 has a tubular portion 10 formed therein. A plurality of engaging protrusions 11 are formed at predetermined intervals in the circumferential direction on the outer peripheral end side of the, and sloped portions 12 are formed at the ends of these engaging protrusions 11. ..

Then, after the annular seal member 13 is fitted into the seal holding portion 5 of the housing 1, the engaging protrusion 11 of the cap 3 is inserted into the insertion portion 7 of the seal holding portion 5, and the cylinder of the cap 3 is inserted. When the cap 10 is inserted and the cap 3 is rotated, the engaging protrusion 11 of the cap 3 is overlapped with the engaging protrusion 6 of the seal holder 5, and the seal member mounting portion 4 is attached to the cap 3 of the cap 3. The seal member 13 is accommodated between the portion 9 and the engaging projection portion 11 in a compressed state between the seal holding portion 5, the collar portion 9 and the tubular portion 10, and the cap 3 is attached to the housing 1.

Next, the operation will be described. The seal holding portion 5 is composed of a back surface portion 5a and a plurality of engaging projections 6 projecting at right angles to the end portion of the back surface portion 5a, and is integrally formed with the housing 1. The rear surface portion 1a of the housing 1 is located substantially at the center of the rear surface portion 5a corresponding to the center O of the seal holding portion 5 (which coincides with the center P of the seal member 13 when the seal holding portion 5 is held by the seal holding portion 5). The seal holding portion 5 is structurally reinforced because the seal holding portions 5 are continuous. Therefore, even if the housing 1 is thermally deformed by the heat when the bulb is turned on, the back surface portion 1a does not spread outward, and the sealing performance is not impaired.

Further, since the rear surface portion 1a of the housing 1 is connected to approximately the center of the rear surface portion 5a corresponding to the center O of the seal holding portion 5, the portion 16 inside the connecting portion 15 has a long span. When the cap 3 is assembled, the portion 16 does not bend and the seal member 13 does not come off, and the dimension L between the rear surface portion 1a of the housing 1 and the end surface portion 3a of the cap 3 becomes small. ..

[0018]

[Effect of the device]

 As described above, according to the present invention, the seal holding portion is formed in the opening provided in the rear portion of the housing, and the seal holding portion is provided at the rear portion and the end portion of the rear portion in a direction perpendicular to the rear portion. It is composed of a plurality of protruding protrusions, and the rear part of the housing is connected to the part of the rear part corresponding to the center O of the seal holder, so this seal holder is structurally reinforced. Therefore, even if the housing is thermally deformed due to the heat when the bulb is turned on, the rear part does not spread outward, and the sealing performance is not impaired, and the rear part of the housing on the rear part is continuous. The part inside the connecting part has a long span, so that this part does not bend and the seal member does not come off when the cap is assembled. Moreover, the rear part of the housing and the end of the cap 3 do not come apart. Size L is reduced with the parts.

[Brief description of drawings]

FIG. 1 is a sectional view of a rear portion of a vehicular lamp according to an exemplary embodiment of the present invention.

FIG. 2 (1) is a side view of the cap. (2) is a bottom view of the cap. (3) is a sectional view taken along the line (2) AA.

FIG. 3 is a rear view of the housing.

FIG. 4 is a vertical sectional view of a rear portion of a conventional vehicle lamp.

[Explanation of symbols]

 1 Housing 1a Rear part 2 Opening 5 Seal holding part 5a Rear part 6 Engagement protrusion

Claims (1)

[Scope of utility model registration request] 1. A vehicle lamp in which an opening used for bulb replacement is formed in a rear portion of a housing, and a cap is detachably fitted to the opening via a seal member, the lamp being provided in the rear portion of the housing. A seal holding portion is formed in the opened opening, and the seal holding portion is composed of a back surface portion and a plurality of engaging projections projecting at an end portion of the back surface portion in a direction perpendicular to the back surface portion. The vehicle lamp characterized in that the rear surface portion of the housing is connected to a portion corresponding to the center O of the seal holding portion.