JP2011181220A - Lamp for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp for a vehicle, capable of reducing costs by reducing the number of parts items and assembling man-hours. <P>SOLUTION: A back cover 20 of the lamp 10 for a vehicle includes: a circular body part 21 covering a bulb insertion hole 16; an outside fitting part 22 and an inside fitting part 23 to be engaged with the bulb insertion hole 16. A fitting groove 25 for receiving a rear end of the bulb insertion hole 16 is formed between the outside fitting part 22 and the inside fitting part 23. The center of the body part 21 is provided with a ventilation hole 24, and a breather filter 26 is formed by insert-molding on the inner surface side of the ventilation hole 24. The back cover 20 is formed from a thermoplastic elastomer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular lamp such as an automobile, and more particularly to a structure of a cover that covers an opening provided on the rear side of a lamp body.

A conventional vehicular lamp has a vent hole communicating with the outside on the rear side of the lamp body, a filter is disposed in the vent hole, and a breathing cap is attached so as to cover the vent hole and the filter (for example, Patent Document 1).
This filter discharges water vapor or the like in the lamp chamber to the outside so that water, dust or the like cannot enter from the outside. Thereby, clouding of the front transparent cover attached to the front opening of the lamp body can be prevented without depending on the running state of the vehicle or the lighting state of the vehicular lamp.

JP 2007-220518 A

  However, a back cover for replacing the bulb is attached to the rear side of the conventional lamp body, and the structure on the rear side of the lamp body is complicated, leading to an increase in cost due to an increase in the number of parts and assembly man-hours. It was.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a vehicular lamp that can reduce the number of parts and the number of assembling steps, thereby reducing the cost.

  A vehicular lamp according to the present invention that can solve the above-described problems is a vehicle in which a light source is disposed in a lamp chamber formed by a lamp body that opens forward and a front transparent cover that is attached to the front opening. In the lamp for a vehicle, an opening is provided on the rear side of the lamp body, and a breathing filter is integrally formed on a cover that covers the opening.

  According to the vehicular lamp having the above-described configuration, since the breathing filter is integrally formed with the cover that covers the opening on the rear side of the lamp body, if the cover is a back cover for replacing the light source, the numerical aperture provided in the lamp body As well as reducing breathing caps. Thereby, the number of parts and the number of assembling steps can be reduced, and the cost of the vehicular lamp can be reduced.

  In the vehicular lamp having the above-described configuration, it is preferable that the breathing filter is integrally formed on the inner surface side of the cover.

  According to the vehicular lamp having such a configuration, since the breathing filter is integrally formed on the inner surface side of the cover, the breathing filter itself is hardly damaged and is not easily dusty.

  In the vehicular lamp having the above configuration, the cover is preferably made of a thermoplastic elastomer.

  According to the vehicular lamp having such a configuration, the breathing filter can be easily insert-molded, and the sealing performance with the lamp body can be secured. By insert-molding the respiratory filter, it is possible to reduce the number of steps for assembling the respiratory filter.

  In the vehicular lamp having the above-described configuration, it is preferable that the cover is made of a hard resin at least at a central portion where the breathing filter is integrally formed, and a fitting portion on the outer periphery thereof is made of a thermoplastic elastomer.

  According to the vehicular lamp having such a configuration, a fitting portion with a lamp body that requires a sealing property is molded with an elastic thermoplastic elastomer, and the other portion is molded with a hard resin having excellent moldability. By doing so, it is possible to obtain a cover excellent in sealing properties and mounting properties.

  According to the vehicular lamp according to the present invention, since the breathing filter is integrally formed on the cover that covers the opening on the rear side of the lamp body, the number of parts and the number of assembling steps can be reduced and the cost can be reduced. .

It is a schematic sectional drawing of the vehicle lamp 10 of 1st Embodiment which concerns on this invention. It is an enlarged view of the back cover 20 of FIG. It is a front view of the back cover 20 of FIG. It is a schematic sectional drawing of the back cover 30 of 2nd Embodiment which concerns on this invention. It is a schematic sectional drawing of the back cover 40 of 3rd Embodiment which concerns on this invention.

  Hereinafter, a first embodiment of a vehicular lamp according to the present invention will be described with reference to FIGS. The vehicular lamp will be described by taking a back cover attached to the rear opening of the lamp body of the headlamp as an example.

  As shown in FIG. 1, the vehicular lamp 10 according to the first embodiment of the present invention has a front lens 12 assembled in a front opening of a lamp body 11 to define a lamp chamber 13. A bulb 14 and a reflector 15 are attached at predetermined positions in the lamp chamber 13. A bulb insertion hole 16 is provided in the rear opening of the lamp body 11, and a back cover 20 is attached to the opening of the bulb insertion hole 16.

  As shown in FIGS. 2 and 3, the back cover 20 includes a circular main body portion 21 that covers the valve insertion hole 16, an outer fitting portion 22 and an inner fitting portion 23 that are engaged with the valve insertion hole 16. It consists of and. A fitting groove 25 that receives the rear end portion of the valve insertion hole 16 is formed between the outer fitting portion 22 and the inner fitting portion 23. A vent hole 24 is provided at the center of the main body 21, and a breathing filter 26 is insert-molded on the inner surface side of the vent hole 24.

  The back cover 20 is formed from a thermoplastic elastomer. An example of the thermoplastic elastomer is a composite of polypropylene (PP) and an ethylene / propylene copolymer (EPDM). The thermoplastic elastomer is weak against heat as compared with rubber. Therefore, a long-term sealing property can be ensured by adopting a rib shape that sandwiches the rear end portion on the lamp body 11 side. The respiratory filter 26 is made of, for example, a porous film or a porous plastic.

  According to the vehicle lamp of the first embodiment described above, since the breathing filter 26 is integrally formed with the back cover 20 that covers the bulb insertion hole 16 on the rear side of the lamp body 11, the opening provided in the lamp body 11. The number of can be reduced. In addition, a breathing cap that has been conventionally worn can be eliminated. Thereby, the number of parts and the number of assembling steps can be reduced, and the cost can be reduced.

  Further, since the breathing filter 26 is integrally formed on the inner surface side of the back cover 20, the breathing filter 26 itself is less likely to be damaged and dust and the like are less likely to adhere.

  Further, since the back cover 20 is made of a thermoplastic elastomer, the breathing filter 26 can be easily insert-molded, and a sealing property with the lamp body 11 can be secured. Moreover, the assembly | attachment man-hour of the respiration filter 26 can be reduced by insert-molding the respiration filter 26.

  Next, the back cover 30 of the vehicular lamp 10 according to the second embodiment of the present invention will be described. In addition, about the location of the same or similar structure as the said 1st Embodiment, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol or a similar code | symbol.

  As shown in FIG. 4, the back cover 30 of the second embodiment is provided with two vent holes 32 and 33 in the vicinity of the center portion of the main body 31 with a predetermined interval. Breathing filters 34 and 35 are insert-molded on the inner surfaces of the vent holes 32 and 33.

  Since the back cover 30 has two vent holes 32 and 33, air convection can be created in the lamp chamber 13 (see FIG. 1). In particular, when the bulb is lit, air can be discharged to the outside of the light chamber 13 through the upper first breathing filter 34 and the first vent hole 32, and the lower second breathing filter 35 and the second vent hole 33. By taking outside air into the interior of the lamp chamber 13 via the convection, air convection in the lamp chamber 13 can be created.

According to the vehicular lamp of the second embodiment described above, air convection is actively created in the lamp chamber 13 by providing the back cover 30 with the two vent holes 32 and 33 and the breathing filters 34 and 35. The air permeability in the lamp chamber 13 can be further improved.
If there is an existing breathing hole on the lamp body 11 side, a similar air convection can be created by providing one breathing filter on the back cover. Further, when there are two back covers, air convection can be created by providing one breathing filter on each cover.

  Next, the back cover 40 of the vehicular lamp 10 according to the third embodiment of the present invention will be described. In addition, about the location of the same or similar structure as the said 1st Embodiment, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol or a similar code | symbol.

  The back cover 40 is provided with a ventilation hole 42 at the center of the main body 41, and a breathing filter 43 is insert-molded on the inner surface side of the ventilation hole 42. A fitting groove 25 is formed by the outer fitting portion 22 and the inner fitting portion 23 in the outer peripheral portion inside the main body portion 41.

  The main body portion 41 is made of a hard resin, and the outer fitting portion 22 and the inner fitting portion 23 are made of a thermoplastic elastomer. That is, the back cover 40 is formed of a hard resin as a whole, and only the inner fitting portion is formed of a thermoplastic elastomer. An example of the hard resin is polypropylene (PP).

  According to the vehicular lamp 10 of the third embodiment described above, the fitting portion with the lamp body 11 that requires sealing properties is molded from an elastic thermoplastic elastomer, and the other portions are excellent in moldability. By molding with a hard resin, it is possible to obtain the back cover 40 excellent in sealing properties and mounting properties.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
That is, in the above embodiment, the back cover attached to the lamp body of the headlamp has been described as an example, but the present invention can also be applied to a lamp body of a marker lamp such as a rear combination lamp.

10 ... Vehicle lamp 11 ... Lamp body (lamp body)
16 ... Valve insertion holes 20, 30, 40 ... Back cover (cover)
21, 31, 41 ... body part 22 ... outer fitting part 23 ... inner fitting part 24, 42 ... vent hole 25 ... fitting groove 26, 43 ... breathing filter 32 ... first vent hole 33 ... second vent hole 34 ... 1st breathing filter 35 ... 2nd breathing filter

Claims (4)

In a vehicular lamp in which a light source is disposed in a lamp chamber formed by a lamp body opened forward and a front transparent cover attached to the front opening,
A vehicular lamp characterized in that an opening is provided on the rear side of the lamp body, and a breathing filter is integrally formed on a cover covering the opening.   The vehicular lamp according to claim 1, wherein the breathing filter is integrally formed on an inner surface side of the cover.   The vehicular lamp according to claim 1, wherein the cover is made of a thermoplastic elastomer. 3. The vehicular lamp according to claim 1, wherein at least a central portion of the cover integrally formed with the breathing filter is made of a hard resin, and a fitting portion on an outer periphery thereof is made of a thermoplastic elastomer.

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