JPH0559704U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it easy to attach the cover tube and to prevent it from coming off, and to reliably prevent water from entering the interior of the lamp. [Structure] A vent hole 10 is formed on the back surface of the lamp body 1 so that the inside and outside communicate with each other. The connection portion 20 is integrally connected to one end of the cover tube 12, and the connection portion 20 is connected to the ventilation hole 10
The cover tube 12 to connect to the vent hole 10. The connecting portion 20 has a locking portion 23 formed of an annular protrusion on the outer peripheral surface of the distal end portion to prevent the distal end from coming off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular lamp, and more particularly to an improvement of a vehicular lamp having a ventilation hole.

[0002]

[Prior Art]

 If the water inside the lamp becomes water drops and adheres to the inner surface of the lens due to a sudden temperature change, the function of the lamp will be significantly reduced. Also, if the temperature inside the lamp rises due to the heat when the bulb is lit, the lamp will be thermally deformed. For this reason, in vehicular lamps such as headlights, clearance lamps, and rear combination lamps, for example, ventilation holes are formed in the lamp body in order to prevent the occurrence of water droplets and fluctuations in temperature and pressure. The inside and outside of the tool communicate. FIG. 9 shows a conventional vehicular lamp having such a vent hole, and a brief description thereof will be given. 1 is a lamp body, 2 is a front lens that forms a lamp chamber with the lamp body 1, and the front lens is The lens 2 has a seal leg 3 formed of a frame-like body integrally projecting on the peripheral edge of the back surface, and is inserted into a seal groove 5 of a lens mounting portion 4 integrally provided in the front opening of the lamp body 1 and a sealant. By being fixed at 6, the front opening of the lamp body 1 is airtightly covered. 7 is a bulb that is inserted and arranged in the lamp body 1 through a valve mounting hole 8 that is opened at the rear top of the lamp body 1, 9 is a bulb socket that holds the bulb 7, and 10 is an appropriate rear surface of the lamp body 1. The vent hole 10 is provided in the interior of the lamp body 1 via a communication tube 11 and a cover tube 12 that are provided on the back surface of the lamp body 1 so as to project therefrom. The communication pipe 11 is integrally provided on the back surface of the lamp body 1 so as to project rearward. The cover tube 12 is made of a rubber tube or the like, and the end portion of the opposite side of the lamp body is bent downward to prevent rainwater and the like from entering the lamp body 1 through the communication pipe 11.

[0003]

[Problems to be solved by the device]

 As described above, in the conventional vehicular lamp, the ventilation hole 10 is provided on the back surface of the lamp body 1 in order to prevent the temperature and pressure in the lamp body 1 from rising and prevent water droplets from adhering to the inner surface of the lens. However, conventionally, one end of the cover tube 12 is simply fitted to the outer peripheral surface of the distal end portion of the communication tube 11, and it is easily removed unless it is fixed with an adhesive. There is a problem that the durability of the lamp is significantly reduced.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to easily attach the cover tube and to prevent the cover tube from being easily removed, so that water enters inside the lamp. Another object of the present invention is to provide a vehicular lamp that is capable of surely preventing the above.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a vehicular lamp in which a vent hole for communicating the inside and outside of the lamp body is formed at an appropriate position on the back surface of the lamp body, and one end of the cover tube is connected to the vent hole. Is fixed to the ventilation hole by a locking means.

[0006]

[Action]

 In the present invention, one end of the cover tube is firmly fixed to the ventilation hole by the locking means to prevent water from entering the lamp body.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view of a main part showing a first embodiment of a vehicular lamp according to the present invention. The same components as those shown in FIG. 9 are designated by the same reference numerals. In this embodiment, in this embodiment, one end of a cover tube 12 is integrally connected with a connecting portion 20 as a locking means, and this connecting portion 20 is packed in a vent hole 10 provided at an appropriate position on the back surface of the lamp body 1. It is configured by inserting and connecting via. The connecting portion 20 is formed as a tubular body having an outer diameter smaller than the hole diameter of the ventilation hole 10, and a flange 22 is integrally provided on the outer peripheral surface of the base end portion while the outer peripheral surface of the distal end side is formed with the above-mentioned structure. An annular locking portion 23 having a triangular cross-section is integrally provided so as to prevent the vent hole 10 from coming off. The maximum outer diameter of the locking portion 23 is set to be larger than the hole diameter of the ventilation hole 10. Further, the tip end portion on which the locking portion 23 is provided is divided into four by a plurality of, for example, four dividing grooves 24 which are equally arranged in the circumferential direction and are formed in the axial direction, and are elastically deformable in the radial direction. Has been done. The other end of the cover tube 12 is curved downward and has a U-shape so that the opening end 12a faces the back surface of the lamp body 1.

In such a structure, the cover tube 12 is attached by fitting the packing 21 onto the outer periphery of the connecting portion 20 and then inserting the tip of the connecting portion 20 into the vent hole 10. At this time, since the locking portion 23 is formed to be larger than the ventilation hole 10, the tip portion of the connecting portion 20 is elastically deformed inward, and the locking portion 23 completely passes through the ventilation hole 10 and the lamp body 1 When it protrudes inward, it elastically returns to its original shape and the engaging portion 23 abuts and engages with the inner surface of the lamp body 1, so that the connecting portion 20 does not come off from the ventilation hole 10 and the cover tube 12 passes through. The packing 21 can be surely connected to the pores 10, and the packing 21 is pressed against the back surface of the lamp body 1 by the flange 22 to hermetically seal the gap between the ventilation hole 10 and the connection portion 20. Prevent water from entering.

Thus, in the vehicular lamp having such a configuration, since the cover tube 12 is connected and locked to the ventilation hole 10 by the connection portion 20, the cover tube 12 connects the connection portion 20 from the ventilation hole 10 to the ventilation hole 10. It does not come off unless it is forcibly pulled out, and it can be fixed stably and securely, and the connection part 20 has a simple structure, and only needs to be press-fitted into the ventilation hole 10 so that it can be attached with one touch.

FIG. 2 is a cross-sectional view of essential parts showing a second embodiment of the present invention. In this embodiment, an annular groove 26 is formed on the outer peripheral surface of the distal end portion of the communicating pipe 11 projectingly provided on the back surface of the lamp body 1, and the annular groove 26 is formed on the inner peripheral surface of the connection side end portion 12b of the cover tube 12. An annular protrusion 27 that engages is integrally projected. The annular groove 26 has a triangular cross-section with an inclined surface 26a inclined so that the groove depth becomes deeper toward the tip of the communicating pipe 11 and a vertical surface 26b, thereby preventing the annular projection 27 from coming off. I have to. The annular protrusion 27 has substantially the same cross-sectional shape as the annular groove 26. Even in such a configuration, since the annular groove 26 and the annular protrusion 27 constitute a locking means for locking the cover tube 12, even if an external force is applied to the cover tube 12, the cover tube 12 is not easily disengaged from the communication tube 11, and the cover tube is not covered. The tube 12 can be stably and reliably fixed. Further, when the cover tube 12 is attached, when the cover tube 12 is fitted to the outer circumference of the communication pipe 11 and the annular protrusion 27 is aligned with the annular groove 26 and is fitted into the annular groove 26 by elastic return, a coupling sound is generated. Therefore, the operator can determine that the cover tube 12 has been properly attached.

FIG. 3 is a cross-sectional view of essential parts showing a third embodiment of the present invention. In this embodiment, contrary to the second embodiment, an annular projection 30 is integrally provided on the outer peripheral surface of the tip end of the communicating pipe 11, and the annular projection is formed on the inner peripheral surface of the connection side end 12b of the cover tube 12. An annular recess 31 that engages with 30 is formed. Even in such a configuration, since the annular projection 30 and the annular recess 31 constitute the locking means of the cover tube 12, the cover tube 12 does not easily come off and the cover tube 12 can be fixed stably and reliably. is there .

FIG. 4 is a cross-sectional view of an essential part showing a fourth embodiment of the present invention. In this embodiment, the cover tube 12 in the third embodiment is made of a heat-shrinkable resin (eg, trade name "Raychem", "Hishitube", etc.). Then, the connection side end 12b of the cover tube 12 is fitted to the outer circumference of the communication pipe 11, and hot air 33 is applied to the connection side end 12b to cause thermal contraction. In such a configuration, the contact force of the connection-side end portion 12b with respect to the communication pipe 11 can be increased by heat contraction, so that there is an advantage that the cover tube 12 can be more stably and reliably fixed. . Further, before the heat treatment, the inner diameter of the cover tube 12 is not required to be strict, and it is sufficient that the cover tube 12 is lightly stopped on the annular protrusion 30. Therefore, the work of fitting the cover tube 12 into the communication pipe 11 is easy.

FIG. 5 is a cross-sectional view of essential parts showing a fifth embodiment of the present invention. In this embodiment, the connection side end portion 12b of the cover tube 12 is fitted to the outer periphery of the communication pipe 11, and the flange portion 37 integrally provided on the outer peripheral surface of the tip end portion of the connection side end portion 12b is provided with a plurality of nails 38. It is fixed to the stepped surface 39 of the communicating pipe 11 by means of. In such a structure, since the cover tube 12 is mechanically fixed to the communication pipe 11 by the nail 38, there is no concern that the cover tube 12 will come off even if an external force is applied, and the cover tube 12 can be fixed stably and accurately. Further, the driving of the nail 38 can be added to the conventional assembling equipment, so that the cost can be increased only slightly. Not only the nail 38 but also a rivet, a stapler, a nail, a tack, or the like can be used.

FIG. 6 is a cross-sectional view of essential parts showing a sixth embodiment of the present invention. In this embodiment, a tightening ring 40 is used instead of a nail to fix the connecting end 12b of the cover tube 12 to the outer circumference of the communicating tube 11. The tightening ring 40 is made of an elastic body made of rubber, resin, metal or the like or a heat-shrinkable resin, and may be any as long as it tightens the connection side end 12b. Even with such a configuration, the cover tube 12 can be stably and reliably fixed, as in the first to fifth embodiments.

FIG. 7 is a cross-sectional view of essential parts showing a seventh embodiment of the present invention. In this embodiment, the connection-side end 12b of the cover tube 12 is inserted into the vent hole 10 so that the tip of the cover tube 12 protrudes into the interior of the lamp body 1, and the protrusion 41 is caulked and fixed to the inner surface of the lamp body 1 to cover the cover tube. It is intended to prevent 12 from coming off. In this case, if the flange 42 is provided on the outer circumference of the cover tube 12 and is brought into close contact with the tip end surface of the communication tube 11, the cover tube 12 can be prevented from moving in the lamp body direction.

FIG. 8 is a sectional view showing another embodiment of the cover tube. In this embodiment, bristles 44 are planted on the inner peripheral surface of the cover tube 12 in the direction of the open end 12a of the tube. In such a cover tube 12, the backflow of water can be prevented by the resistance of the bristles 44, the wettability of water is good, and there is no risk of water droplets closing the open end 12a, and the air permeability of the lamp body is improved. It can be held well.

[0017]

[Effect of the device]

 As described above, according to the vehicular lamp of the present invention, since the cover tube is connected and fixed to the vent hole communicating the inside and outside of the lamp body by using the locking means, the cover tube is stably and reliably fixed. Therefore, it is possible to reliably prevent water from entering the lamp body and falling off of the cover tube due to external force.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a first embodiment of a vehicular lamp according to the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of an essential part showing a third embodiment of the present invention.

FIG. 4 is a cross-sectional view of an essential part showing a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing a fifth embodiment of the present invention.

FIG. 6 is a cross-sectional view of essential parts showing a sixth embodiment of the present invention.

FIG. 7 is a cross-sectional view of essential parts showing a seventh embodiment of the present invention.

FIG. 8 is a sectional view showing another embodiment of the cover tube.

FIG. 9 is a cross-sectional view showing a conventional example of a vehicle lamp.

[Explanation of symbols]

 1 Lamp Body 2 Front Lens 3 Seal Leg 4 Lens Mounting Part 5 Seal Groove 10 Vent Hole 11 Communication Tube 12 Cover Tube 20 Connection Part 26 Annular Groove 27 Annular Protrusion 30 Annular Protrusion 31 Annular Recess 38 Nail 40 Tightening Ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Yabe, 500 Kitawaki, Shimizu, Shizuoka Prefecture, Koito Manufacturing Co., Ltd.Shizuoka Plant (72) Inventor, Koyo Nishida, 500, Kitawaki, Shimizu City, Shizuoka Prefecture Koito Manufacturing, Shizuoka Plant (72) Creator Yayoi Takada 500 Kitawaki, Shimizu City, Shizuoka Prefecture Koito Manufacturing Co., Ltd. Shizuoka Factory

Claims (1)

[Scope of utility model registration request] 1. A vehicular lamp in which a vent hole for communicating the inside and outside of the lamp body is formed at an appropriate position on the back surface of the lamp body, and one end of a cover tube is connected to the vent hole, the cover tube being locked by a locking means. A vehicular lamp that is fixed to a ventilation hole.