JPH01143102A - Vehicle lighting appliance - Google Patents

Abstract

PURPOSE: To prevent infiltration of waterdrops and dust, by providing a permeable member pressure-welded and fixed to the whole periphery of a vent hole and the inside wall of a wall part. CONSTITUTION: A vent hole 11 having an appropriate diameter is formed above a socket mounting hole 7 in a dorsal surface of a housing 2, and a cylindrical wall part 12 surrounding the vent hole 11 is provided so as to protrude backwards. A cylindrical permeable member 13 is water-tightly pressure-welded and fixed to the bottom surface and the inside wall surface of the cylindrical wall part 12 so as to block the vent hole 11. Consequently, the inside of a lamp chamber 4 of the lamp for vehicle 1 is communicated with the outside air through the permeable member 13 blocking the vent hole 11, thereby the air pressure of the inside of the lamp chamber 4 is equal to the outside air pressure to prevent the operation of breathing. Further, infiltration of waterdrops and dust is prevented by the characteristic of the permeable member 13, which enables to keep a good characteristic of light distribution at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicular lamp including a pseudo lamp such as a reflex reflector and a finisher.

(Prior Art) In general, a vehicle lamp has a lens disposed on the front surface of a housing, and a lamp bulb attached to a socket is disposed in a light chamber defined by the housing and the lens. In order to prevent water from entering the lamp chamber, the housing and lens are completely sealed together using a sealant such as hot melt, or hot plate welding is used to improve the airtightness of the lamp chamber. However, as the airtightness of the lamp chamber is improved, when the lamp bulb is turned on, the internal pressure of the lamp chamber rises rapidly due to heat generation, and when the lamp is turned off, the internal pressure decreases. This repeated turning on and off causes a so-called breathing effect due to changes in internal pressure; for example, moisture from outside the lamp is transmitted through the cord core wire of the socket, absorbed into the lamp chamber, and this moisture condenses into dew in the low-temperature parts. As a result, cloudiness occurs on the inner surface of the lens or the reflective surface of the reflector. In addition, the higher the airtightness of the lamp chamber, the more difficult it is for the moisture that has entered the lamp chamber to be discharged outside the lamp chamber and is not removed. A similar phenomenon occurs even in pseudo lamps without a light source, such as reflex reflectors and finishers, due to the difference in outside temperature between day and night.

For this reason, in order to keep the internal pressure of the lamp chamber constant, eliminate the breathing effect, and prevent moisture from entering, conventional vehicle lamps have housings molded from thermoplastic resin, as shown in Figure 12. a and lens b on a hot plate 1? A lamp bulb C attached to a socket e having a code f is arranged in a lamp chamber d, and ventilation holes q are formed at upper and lower positions in the rear of the housing a.
There is a light fixture that has a curved cylindrical rubber grommet h that communicates with the grommets h.

(Problems to be Solved by the Invention) However, in such a conventional lamp structure, for example, in a lamp such as a front combination lamp or a side marker lamp of a car, high-pressure water is directly applied to the back of the lamp during car washing. Even if the grommet h is curved, there is a problem in that water may enter the lamp chamber from its opening as shown by the arrow ρ. In addition, since the grommet h protrudes from the back of the housing a, it interferes with the vehicle body panel (not shown), which is not only inconvenient, but also causes problems such as the grommet h easily coming off. However, since the inner diameters of the ventilation hole q and the grommet h are set small, the breathing effect has not been sufficiently reduced. That is, in the conventional type, if the inner diameter of the ventilation hole Q and the grommet h are increased, air convection can be improved and the breathing effect can be reduced, but on the other hand, if the inner diameter of the grommet h is set large, dust, etc. Regardless of the effect, the dust tends to enter the lamp chamber, and the invading dust contaminates the inner surface of the lens and the reflector, resulting in a reduction in light distribution performance.

The present invention was developed in view of the above-mentioned circumstances, and it prevents dust from entering through the ventilation holes, significantly reduces the breathing action within the lamp chamber, prevents moisture from entering the lamp chamber, and prevents the entry of moisture into the lamp chamber. It is an object of the present invention to provide a vehicular lamp that can prevent fogging of the flap and maintain good light distribution performance.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a ventilation hole for communicating the airtight internal space with the outside air and a wall portion surrounding the ventilation hole. , a vehicular lamp in which a breathable member is press-fixed to the entire periphery of the vent hole and the inner wall of the wall portion, wherein the breathable member is a continuous porous member having water repellency and air permeability; It is characterized by comprising a hard reinforcing member that surrounds and holds the outer periphery of the reinforcing member, and a soft waterproof member that surrounds the outer periphery of the reinforcing member and is pressed into contact with the inner wall of the wall portion.

(Function) A ventilation member is provided in the wall surrounding the ventilation hole for communicating the airtight internal space with the outside air, and is press-fixed to the entire periphery of the ventilation hole and the inner wall of the wall. The internal pressure inside the lamp is maintained at atmospheric pressure, which prevents breathing and also prevents water droplets and dust from entering.

(Embodiment) FIG. 1 shows a first embodiment of a vehicle lamp according to the present invention.

This vehicle lamp 1 includes a housing 2 having an opening on the front side.
A lens 3 is bonded to the front surface of the housing 2 so as to cover the housing 2, and a lamp bulb 5 is disposed within a lamp chamber 4 defined by the housing 2 and the lens 3.

The housing 2 is integrally molded from synthetic resin and has a groove 6 at the periphery of its front opening and a socket mounting hole 7 at its rear. The lens 3 is provided with leg portions 8 around its entire periphery, and the leg portions 8 are inserted into the groove portions 6 of the housing 2 and bonded with hot melt 9. Further, the lamp bulb 5 is held in a socket 10 inserted into a socket mounting hole 7 of the housing 2.

Further, at the rear of the housing 2, a ventilation hole 11 of an appropriate diameter is formed above the socket mounting hole 7, and a cylindrical wall portion 12 surrounding the ventilation hole 11 is provided to protrude rearward. ing. A cylindrical air-permeable member 13 is fixed to the bottom surface and inner wall surface of the cylindrical wall portion 12 in a watertight manner so as to close the ventilation hole 11.

This breathable member 13 is composed of a continuous porous member 14, a reinforcing member 15 surrounding the outer periphery of the continuous porous member 14, and a waterproof member 16 further surrounding the outer periphery. The continuous porous member 14 is made of, for example, tetrafluoroethylene resin (PTFE),
It has open cells, allowing air and gas to pass through it, but does not allow water droplets to pass through.It has breathability and water repellency, and is also flexible. Each of the members 15 and 16 is made of an elastic material such as rubber, and the reinforcing member 15 surrounding the continuous porous member 14 is made of a hard material, while the waterproof member 16 is made of a soft material. These members 15, 16 are contracted by applying heat and are respectively fixed watertightly to the inner member. As another example, an adhesive layer may be interposed between each member for fixation. As shown in FIG. 2, this breathable member 13 is extruded into an elongated cylindrical shape, and is used by cutting it into a required length. Therefore, in this breathable member 13, the hard reinforcing member 15 maintains the shape of the flexible continuous porous member 14, and the soft waterproof member 16 is elastically pressed against the inner wall and fixed in a watertight manner within the wall portion 12. be done.

Thereby, in the vehicle lamp 1, the inside of the light chamber 4 and the outside air are communicated via the ventilation member 13 that closes the ventilation hole 11, and the light chamber 4
The inside and outside air are at the same pressure, preventing breathing effects, and the characteristics of the breathable member 13 prevent water droplets and dust from entering the lamp chamber, so that good light distribution characteristics are always maintained.

Furthermore, since the outer periphery of the continuous porous member 14 is surrounded by the hard reinforcing member 15, its shape is maintained and the holes are not crushed during press-fitting.

FIG. 3 shows a second embodiment of the vehicle lamp according to the present invention.

This vehicle lamp 17 has mounting bolts 19.2 at the rear of its housing 18 for attaching it to the body of an automobile.
0. Further, the housing 18 is provided with a lens 3 and a lamp bulb 5 having the same structure as in the previous embodiment.

The housing 18 has cylindrical wall portions 21 and 22 formed above and below the socket mounting hole 7, respectively. A mounting bolt 19 is attached to the upper wall portion 21 so that its threaded portion protrudes rearward. Further, the lower wall portion 22 is provided with a ventilation hole 23 on its bottom surface, and a ventilation path 24 extending along the axial direction from the opening on the lower inner wall surface. Inside this lower wall portion 22, on the side of the ventilation hole 23, there is a ventilation member 25 having a structure similar to that of the embodiment described above, which closes the ventilation hole 23.
is fixed in a watertight manner by pressure contact, and a mounting bolt 20 is spaced apart from the ventilation member 25 on the opening side, and its head is fixed by ultrasonic welding so as to close the opening leaving a ventilation passage 24, and is connected to the upper bolt 19. installed in the same way. As a result, the spaced apart portion 26 between the first ventilation member 25 and the head of the mounting bolt 20 becomes a ventilation portion that is continuous with the ventilation path 24.

Therefore, the inside of the lamp chamber 4 and the outside air communicate with each other through the ventilation member 25 that closes the ventilation hole 23, and the same effects as in the previous embodiment are obtained.

FIG. 4 shows a third embodiment of the vehicle lamp according to the present invention.

This vehicle lamp 27 is equipped with a mounting bolt at the rear of its housing 28, and has a ventilation structure different from that of the previous embodiment. Also in this embodiment, this housing 2
A lens 3 and a lamp bulb 5 similar to those in the previous embodiments are attached to the lens 8 with the same configuration.

The housing 28 includes cylindrical wall portions 29 and 30 that protrude rearward above and below the socket mounting hole 7, and a ventilation hole 31 of an appropriate diameter is formed in the bottom surface of the lower wall portion 30.

Mounting bolts 31.3 are attached to these wall portions 29°30.
2 is attached so that its threaded portion protrudes rearward. The lower mounting bolt 32 has a through hole 33 formed in the axial direction at its center, and a breathable member 34 having the same configuration as in each of the above embodiments is fixed to the through hole 33 by pressure contact. are fixed to the bottom and inner wall surfaces of the wall 30 of the housing 28 by ultrasonic welding so as to completely close the ventilation hole 31.

Even in this case, the lamp chamber 4 and the outside air communicate with each other through the ventilation member 34 that closes the ventilation hole 31, and the same effects as in each of the embodiments described above can be obtained.

FIG. 5 shows a fourth embodiment of the vehicle lamp according to the present invention.

This vehicle lamp 35 is of a type that is attached to a lamp attachment opening 37 of a vehicle body panel 36 from the inside.

The housing 38 has an opening on its front surface that is larger than the lamp mounting opening 37 of the vehicle body panel 36, and a groove 39 is formed around the entire periphery of the front opening.

A socket mounting hole 40 is provided at the rear thereof, and a socket 42 holding a lamp bulb 41 is inserted into this socket mounting hole 40. The lens 43 has a front part 44 that is exposed from inside the lamp mounting opening 37, and a bent part 45 that continues rearward around the entire periphery of the front part 44 and is bent outward inside the vehicle body panel. The leg portion 46 is inserted into the groove portion 39 of the housing 38 via the leg portion 46 .

The leg portion 46 is joined to the groove portion 39 via hot melt 47 to define a lamp chamber 48. Further, a ventilation hole 49 of an appropriate diameter is formed in the bent portion 45 of the lower leg portion 46, and an inner wall portion 50 surrounding the ventilation hole 49 together with the lower leg portion 46 is formed. A breathable member 51 having the same structure as in each of the embodiments described above is fixed to the inner side of the leg portion 46 and the inner wall portion 50 so as to completely close the ventilation hole 49. As a result, the lamp chamber 48 and the outside air communicate with each other through the ventilation member 51 that closes the ventilation hole 49, and the same effects as in each of the embodiments described above are obtained.

FIG. 6 shows a fifth embodiment of the vehicle lamp according to the present invention.

This vehicular lamp 52 includes a socket that holds a lamp bulb and a through-hole that communicates the lamp chamber with the outside air.

In the figure, the lens 5 is attached to the entire periphery of the front opening of the housing 53.
The leg portions 55 of 4 are airtightly fixed, and the housing 53
A socket 59 holding a lamp bulb 58 is inserted into a socket mounting hole 57 formed at the rear of the housing 53 in a lamp chamber 56 defined by a lens 54 and a lens 54 .

This socket 59 is a cylindrical body made of synthetic resin.
As shown in the figure, the upper portion thereof includes a protrusion 60 projecting outward, and a flange portion 61 spaced apart from the protrusion 60,
The protrusion 60 and the flange 61 are fixed to the socket mounting hole 57 by airtightly sandwiching the periphery of the socket mounting hole 57 of the housing 53 via an elastic packing 62. In addition, a bulging cylindrical side wall 64 having a through hole 63 that communicates the inside and outside of the lamp chamber 56 is integrally formed on one side of the socket 59 . Further, a stepped portion 65 is provided around the front portion of the through hole 63 so as to protrude inward.

Inside this side wall 64, a breathable member 66 having a structure similar to that of each of the embodiments described above is fixed in a watertight manner by being pressed against the step portion 65 and the inner wall surface.

As a result, the lamp chamber 56 and the outside air communicate with each other through the ventilation member 66 that closes the through hole 63, and the same effects as in each of the embodiments described above are obtained.

Next, an embodiment in which the present invention is applied to a pseudo lamp without a light source will be described.

FIG. 8 shows a sixth embodiment in which the present invention is applied to a reflex reflector.

The reflex reflector 67 includes a lens plate 68 made of transparent resin and a housing 69. The lens plate 68 has a large number of retroreflection prisms 70 formed on its inner surface, and legs 7 along its entire periphery.
1 is formed.

The entire circumference of the leg portion 71 is ultrasonically welded to the front surface of the housing 69.

The head of a mounting bolt 71 is similarly ultrasonically welded to the resin housing 69 so that the threaded portion thereof protrudes rearward. In addition, a relatively small diameter ventilation hole 72 is formed in the housing 69, and a ventilation hole 72 is formed in the rear part of the housing 69.
A cylindrical wall portion 73 having a larger diameter is formed. A breathable member 74 having a configuration similar to that of each of the embodiments described above is inserted into the bottom surface and inner wall surface of the cylindrical wall portion 73 in a watertight manner so as to completely close the ventilation hole 72.

As a result, the inside of the reflex reflector 67 and the outside air communicate with each other through the air-permeable member 74 that closes the ventilation hole 72, and the same effects as in each of the embodiments described above are obtained.

FIG. 9 shows a seventh embodiment in which the present invention is applied to a reflex reflector. However, a lens plate 68 similar to that of the previous embodiment is attached to the front surface of the housing of this reflex reflector 75 with a similar configuration.

The housing 76 has a ventilation hole 77 of an appropriate diameter in its center.
A cylindrical wall portion 78 having a larger diameter than the ventilation hole 77 is formed at the rear thereof. A mounting bolt 79 is attached to this cylindrical wall portion 78 so that its threaded portion protrudes rearward. This mounting bolt 79 has a through hole 80 formed in its center in the axial direction, and a breathable member 81 having a configuration similar to that of each of the embodiments described above is inserted into the through hole 80 under pressure. Ventilation holes 7 are provided on the bottom and inner wall surfaces of the wall portion 78 of the housing 76.
7 is fixed by ultrasonic welding so as to completely block it.

Even in this case, the inside of the reflex reflector 5 and the outside air communicate with each other through the air permeable member 81 that closes the ventilation hole 77, and the same effects as in the above embodiments can be obtained.

FIG. 10 shows an eighth embodiment in which the present invention is applied to a reflex reflector. In this embodiment as well, a lens plate 68 similar to that of the previous embodiment is attached to the front surface of the housing of the reflex reflector 82 with a similar configuration.

The housing 83 has a ventilation hole 84 of an appropriate diameter in its center.
A cylindrical wall portion 85 having a larger diameter than the ventilation hole 84 is formed at the rear thereof. Further, this wall portion 85 is provided with a ventilation passage 86 along the axial direction from the opening on the inner wall surface on the lower side.

Inside this wall portion 85, on the side of the ventilation hole 84, there is a ventilation member 8 having a structure similar to that of each of the embodiments described above to close the ventilation hole 84.
7 is press-fitted in a water-tight manner, and a mounting bolt 88 is attached at a distance to the ventilation member 87 on the opening side so that its head is fixed by ultrasonic welding so as to close the opening except for the ventilation passage 86. As a result, the ventilation member 87 and the mounting bolt 88
A portion 89 separated from the head becomes a ventilation portion that is continuous with the ventilation path 86. Even if you do this, the reflex reflector 8
2 and the outside air are communicated with each other through the ventilation member 87 that closes the ventilation hole 84, and the same effects as in each of the embodiments described above are obtained.

FIG. 11 shows a ninth embodiment in which the present invention is applied to a finisher.

This finisher 90 includes a resin molded lens 91 and a housing 92. The lens 91 has leg portions 93 formed around its entire periphery. The leg portion 93 is watertightly joined to the housing 92 via an adhesive over its entire circumference. The housing 92 has ventilation holes 94 of appropriate diameters formed at both ends thereof, and a cylindrical wall portion 95 having a larger diameter than the ventilation holes 94 at the rear thereof. A breathable member 96 having the same structure as in each of the embodiments described above is inserted into the bottom surface and inner wall surface of this cylindrical wall portion 95 in a watertight manner so as to completely close the ventilation hole 94.

As a result, the interior of the finisher 90 and the outside air communicate with each other via the breathable member 96 that closes the ventilation hole 94, and the same effects as in each of the embodiments described above are obtained.

The various configurations applied to the above-mentioned lamps and reflex reflectors can also be applied to this finisher.

(Effects of the Invention) As described above, the vehicle lamp according to the present invention has a ventilation hole for communicating the airtight interior space with outside air, and a wall portion surrounding the ventilation hole, which has good air permeability and repellency. Since it is sealed watertightly with a water-based breathable member, the internal space and the outside have the same atmospheric pressure, preventing the breathing effect due to the difference in atmospheric pressure, and making it possible to maintain desired light distribution characteristics for a long time. In addition, the breathable member includes a continuous porous member having water repellency and air permeability, a hard reinforcing member surrounding the outer periphery of the continuous porous member, and a soft waterproof member surrounding the outer periphery of the reinforcing member. This is fixed in a watertight manner to the entire periphery of the ventilation hole and the inner wall surface within the wall, so there is no risk of water droplets or dust entering the internal space. Furthermore, since the outer periphery of the continuous porous member is surrounded by the hard member, its shape is maintained and the holes are not crushed during press-fitting.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of a vehicle lamp according to the present invention, FIG. 2 is a schematic perspective view showing a ventilation member provided in the same lamp, and FIG. 3 is a cross-sectional view showing a first embodiment of a vehicle lamp according to the present invention. 4 is a sectional view showing a third embodiment of the vehicle lamp according to the present invention, and FIG. 5 is a sectional view showing a fourth embodiment of the vehicle lamp according to the present invention. Cross-sectional view showing the embodiment, No. 6
The figure is a cross-sectional view showing a fifth embodiment of the dual-use lamp according to the present invention, FIG. 7 is an enlarged cross-sectional view of the main part of the same lamp, and FIG.
A sectional view showing a sixth embodiment of the dual-use lamp according to the present invention,
FIG. 9 is a sectional view showing a seventh embodiment of the vehicle lamp according to the present invention, and FIG. 10 is a cross-sectional view showing the eighth embodiment of the vehicle lamp according to the present invention.
FIG. 11 is a sectional view showing a ninth embodiment of a vehicle lamp according to the present invention, and FIG. 12 is a sectional view showing an example of a conventional vehicle lamp. 4...Light chamber (inner space), 11...Vent hole, 12.
...Wall portion, 13...Breathable member, 14...Continuous porous member, 15...Hard reinforcing member, 16...Soft waterproof member. Figure 1

Claims (1)

[Claims] A vehicular lamp comprising a ventilation hole for communicating an airtight interior space with outside air and a wall surrounding the ventilation hole, and a ventilating member being pressure-bonded and fixed to the entire periphery of the ventilation hole and the inner wall of the wall. The breathable member includes a continuous porous member having water repellency and air permeability, a hard reinforcing member surrounding and holding the outer periphery of the continuous porous member, and a hard reinforcing member surrounding the outer periphery of the reinforcing member. A vehicular lamp comprising: a soft waterproof member that is pressed against the inner wall of the wall portion.