JPH01279502A - Lighting fixture for vehicle - Google Patents

Abstract

PURPOSE:To prevent intrusion of water drops, dust, etc. by equipping a drafty member with a continuous porous sheet, a drafty reinforcing sheet affixed to the side face of this sheet, and waterproof part in the form of soft cylinder only in the peripheries of the two sheets. CONSTITUTION:A drafty member 13 is composed of a continuous porous sheet 14, a drafty reinforcing sheet 15, which is in the form of a disc having the same dia. as the sheet 14 and is affixed to the side face thereof, and a waterproof member 16 in the form of soft cylinder made by insert formation so that only the peripheries of the two sheets 14, 15 are embedded. The member thus formed 13 is pressure fitted into a wall 12 in cylindrical form with the sheet 15 facing outward and the surrounding of a vent hole 11 in the bottom of the wall 12 and a member 16 outside the inner wall of the wall 12 are in pressure contact. Thereby in this lighting fixture 1 for car concerned the inner part of a light chamber 4 and the outer air are in communication through the mentioned member 13 blocking the vent hole 11 to bring about the same pressure to the inner part of the light chamber 4 and the outer air, which prevents the inspiraiting action, and the characteristic of the member 13 prevents intrusion of water drops and dust into the light chamber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle 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 pulp attached to a socket is disposed in a lamp 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 using a sealant such as hot melt, and hot plate welding is used to improve the air concavity 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. 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 onto the road outside the lamp chamber, and thus will not be 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 are fixed together by hot plate welding, a socket eke with cord r and the attached lamp bulb C are placed in lamp chamber d, and ventilation holes Q are drilled in the upper and lower positions of the rear of housing a. There is a lamp with a structure in which a curved cylindrical rubber grommet h that communicates with the ventilation hole q is attached.

(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 that water will enter the light chamber through the opening as shown by the arrow.Also, since the grommet h protrudes from the back of the housing a, the car body panel (not shown) ), which is not only inconvenient but also causes problems such as the grommet h being easily dislodged.Furthermore, in the conventional type, the inner diameter of the vent hole q and grommet h is set small, so there is no sufficient breathing effect. However, in the conventional case, if the inner diameter of the vent hole q and grommet h is increased, air convection can be improved and the breathing effect can be reduced. When the inner diameter is set large, it becomes easy for dust and the like to enter the lamp chamber regardless of the breathing effect, and there is also the problem that the intruded dust and dirt contaminates the inner surface of the lens and the flutter, deteriorating the light distribution performance.

Therefore, the present invention has been made to address the above-mentioned circumstances, and it prevents dust from entering through the ventilation holes, but also significantly reduces the breathing action inside the lamp chamber to prevent moisture from entering the lamp chamber. It is an object of the present invention to provide a vehicular lamp capable of preventing fogging of a spear flap and maintaining 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 vehicle lamp in which a ventilation member is fixed so as to be in pressure contact with the entire periphery of the ventilation shaft and the inner wall of the wall portion, wherein the ventilation member is a continuous porous sheet having water repellency and air permeability, and the continuous porous sheet. The invention is characterized by comprising an air permeable reinforcing sheet attached to the side surface of the sheet, and a soft cylindrical waterproof member formed by molding both of these sheets into an insert so that only the outer periphery of the sheet is buried.

(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 to prevent breathing effects and to prevent 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 is provided with a groove 6 at the periphery of its opening, and four socket holes 7 at its rear. The lens 3 has a leg portion 8 around its entire periphery, and this leg portion 8 is inserted into the groove portion 6 of the housing 2 and bonded with hot melt 9. Further, the lamp bulb 5 is held in a socket 10 that is fitted into the 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 breathable member 13 is fixed in a watertight manner within this cylindrical wall portion 12 so as to close the ventilation hole 11 .

This breathable member 13, as shown enlarged in FIG.
A disc-shaped continuous porous sheet 14, a disc-shaped breathable reinforcing sheet 15 having the same diameter as the continuous porous sheet 14 and attached to one side thereof, and only the outer peripheral portions of both sheets 14 and 15. A reinforcing sheet 15 comprising a soft n-shaped waterproof member 16 formed in inset so as to be embedded therein may be attached to both sides of the continuous porous sheet 14.

The continuous porous sheet 14 is made of, for example, tetrafluoroethylene resin (
It is made of PTFE, etc., and has open cells that allow air and gas to pass through it, but water droplets do not pass through it, making it breathable and water repellent, as well as being flexible. Breathable reinforcing sheet 15
For example, a non-woven fabric that is breathable and has a certain degree of rigidity is used. The continuous porous sheet 14 is attached to one side of the reinforcing sheet 15 with an adhesive applied to the outer periphery thereof. The continuous porous sheet 14 and reinforcing sheet 15 thus integrated are placed at a predetermined position in a mold for molding the waterproof member 16.

The waterproof member 16 is molded from soft rubber or a soft resin material, and the molten material is injected into a mold to integrally mold both sheets 14 and 15 in a four-note manner. The continuous porous sheet 14 is inherently flexible and cannot be subjected to insert molding, but since it is reinforced with the reinforcing sheet 15, in-4 note molding is possible.

The breathable portion 41113 formed in this way is press-fitted into the cylindrical wall portion 12 with the reinforcing sheet 15 facing outward, and is inserted into the periphery of the ventilation hole 11 on the bottom surface of the wall portion 12 and the inside of the wall portion 12. The outer soft waterproof member 16 is pressed against the inner wall surface. Thereby, in the vehicle lamp 1, the inside of the light chamber 4 and the outside air communicate with each other 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 continuous porous sheet 14 is reinforced with a reinforcing sheet 15 having some degree of rigidity on its side, when the breathable member 13 is press-fitted into the wall portion 12, the outer diameter of the breathable member 13 is Even when it contracts, the continuous porous sheet 14 bends together with the reinforcing sheet 15, so that the fine air holes in the continuous porous sheet 14 are not crushed and clogged. Furthermore, by oriented the reinforcing sheet 15 outward, solvents and the like do not directly come into contact with the continuous porous sheet 14, so that the continuous porous sheet 14 is not altered in quality or its vent holes are not expanded or crushed.

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-receiving hole 7, respectively. A mounting bolt 19 is attached to the upper wall portion 21 so that its threaded portion protrudes rearward. In addition, 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 its lower inner wall surface. Inside this part of the wall 22, a ventilation member 2 having the same structure as in the previous embodiment is placed on the side of the ventilation hole 23 to close it.
5 is press-fitted in a water-tight manner, 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. It is installed in the same way. As a result, the space 26 between the breathable Fll material 25 and the head of the mounting bolt 20
is 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. In this embodiment as well, the housing 28 includes a lens 3 and a lamp bulb 5 similar to those in the previous embodiments.
are installed with a similar configuration.

This housing 28 is provided with cylindrical wall portions 29, 30 that protrude rearward in the direction of 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. In addition, the lower mounting bolt 32 has a through hole 33 formed in the axial direction of its center, and a large diameter portion 33a of the head continuous with the d-passenger 33 has the same structure as in each of the above embodiments. A ventilation member 34 is press-fixed, and its head is formed into a ventilation hole 3 on the bottom and inner wall surface of the wall 30 of the housing 28.
1 is fixed by ultrasonic welding so as to completely cover the area.

In this way, the lamp chamber 4 and the outside air communicate with each other through the ventilation member 34 that closes the ventilation hole 31, thereby achieving the same effect as in each of the embodiments described above.

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 moon viewing 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 the inside of 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 .

Then, the leg portion 46 is inserted into the groove portion 39 using a hot I-melt 47.
are joined 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 four ventilation holes together with the lower leg portion 46 is formed. A breathable member 51 having the same structure as in the previous two embodiments 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 front edge of the housing 53.
The leg portions 55 of 4 are airtightly fixed, and the housing 53
Five sockets holding lamp bulbs 58 are inserted into socket mounting holes 57 formed at the rear of the housing 53 in a lamp chamber 56 defined by a lens 54 and a lamp chamber 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, one side of the socket 59 has a through hole 63 that serves as a ventilation hole that communicates the inside and outside of the lamp chamber 56 on the right cylindrical side!
1!64 is integrally formed with a bulge. 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 back 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 the flex 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 large diameter portion 80a provided in the head continuous with this through hole 80 has the same configuration as in each of the above embodiments. The air permeable member 81 is inserted under pressure, and its head is pressed against the housing 76.
It is fixed to the bottom surface and inner wall surface of the wall portion 78 by ultrasonic welding so as to completely close the ventilation hole 77.

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 housing of the reflex reflector 82 with the same structure.

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 an airtight interior space with outside air, and a wall portion surrounding the ventilation hole to improve ventilation and ( a Since it is sealed water-tightly with a water-based breathable material, the internal space and the outside are at the same pressure, preventing the breathing effect caused by the difference in air pressure, and allowing the desired light distribution characteristics to be maintained for a long time. The material is inserted into a continuous porous sheet that is water repellent and breathable, a breathable reinforcing sheet attached to the side surface of this continuous porous sheet, and both sheets are buried so that only the outer periphery of the sheet is buried. It consists of a molded soft cylindrical waterproof member, which is press-fitted into the wall so as to close the ventilation holes, so there is no risk of water droplets or dust entering the internal space.Furthermore, the continuous porous sheet is Since the side surfaces are reinforced with a reinforcing sheet, the shape is maintained and the vent holes are not crushed during press-fitting.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a first embodiment of a vehicle lamp according to the present invention, FIG. 2 is a partially enlarged cross-sectional view of FIG. 1, and FIG. 3 is a second embodiment of a vehicle lamp according to the present invention. FIG. 4 is a sectional view showing a third embodiment of the vehicle lamp according to the present invention, and FIG. 5 is a cross-sectional view showing a fourth embodiment of the vehicle lamp according to the present invention. 6 is a cross-sectional view showing a fifth embodiment of the vehicle lamp according to the present invention, FIG. 7 is an enlarged cross-sectional view of the main part of the lamp shell, and FIG. 8 is a cross-sectional view showing the vehicle 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.
A sectional view showing an 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 part, 13... Breathable member, 14... Continuous porous sheet, 15... Breathable reinforcing sheet, 16...
Soft cylindrical waterproof member. Agent Patent attorney Masahiro Kurai (1 other person) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 10 Figure 12

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 press-fitted into the wall so as to close the ventilation hole. The breathable member includes a continuous porous sheet having water repellency and breathability, a breathable reinforcing sheet attached to the side surface of the continuous porous sheet, and only the outer peripheral portions of both sheets are buried. A vehicular lamp characterized in that it is provided with a soft cylindrical waterproof member insert-molded so as to do so.