JPH0736313U - Draining device for vehicle lighting - Google Patents

Abstract

(57) [Summary] [Purpose] A vehicular lamp equipped with a water draining device that can quickly release water droplets in the lamp chamber and that does not significantly reduce the brightness of the lamp by significantly improving the anti-fog effect in the lamp chamber. I will provide a. [Structure] A tubular portion 15 is integrally provided on a bottom wall 14 of the housing 1, and a drainage hole 17 is provided on an outer periphery of the tubular portion so that the closing members 6 and 7 can be opened and closed. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a breathing / draining device having improved anti-fog performance of a lens of a vehicle lamp.

[0002]

[Prior art]

 In order to prevent the deterioration of the performance of a vehicular lamp due to the intrusion of water, it is effective to seal the housing and the lens and to make a sealed structure inside the lamp chamber defined by the housing and the lens. However, in the case of a structure in which the lamp chamber is simply sealed, the pressure inside the lamp chamber changes due to temperature changes caused by blinking (lighting and extinguishing) of the bulb inside the lamp chamber, and water is supplied from the lowest sealing point of the lamp chamber There is a problem that it sucks into. Therefore, in the above-described vehicle lighting device, a pressure change in the lamp chamber is eliminated by connecting the lamp chamber and the outside with a breathing path made of a cylindrical portion and a breathing grommet to prevent water from entering the lamp chamber from the outside. A breathing structure was developed that was designed to prevent it.

A water draining device for a vehicle lamp will be described below with reference to FIG. In the figure, reference numeral 1 denotes a housing, and a back wall 11 of the housing 1 is integrally provided with a cylindrical portion 13 which projects the inside and the outside of the housing 1 (inside and outside of the lamp chamber 3) from the rear. Reference numeral 2 denotes a lens. The lens 2 has an inner surface appropriately engraved with a prism, and an adhesive leg 21 is integrally provided on the entire peripheral edge of the inner surface. The leg 21 of the lens 2 is adhered to the hot melt groove 18 of the housing 1 with an adhesive (hot melt) 8 and sealed, and the lamp chamber 3 is defined by the lens 2 and the housing 1.

Reference numeral 41 is a socket, and 4 is a bulb as a light source detachably attached to the socket 41. By inserting the bulb 4 into the lamp chamber 3 through the entry hole (not shown) of the housing 1 and detachably mounting the socket 41 on the housing 1, the bulb 4 is arranged at a predetermined position of the lamp chamber 3. It Reference numeral 5 denotes a rubber tubular U-shaped grommet. One opening end of this grommet 5 is externally fitted to the tip end of the cylindrical portion 13, and the other opening end is directed downward. Are opposed to the back wall 11 of the housing 1.

Thus, in the above-described water draining device for a vehicle lamp, the interior of the lamp chamber 3 and the outside communicate with each other via the breathing path formed by the cylindrical portion 13 and the grommet 5. As a result, a breathing action is performed between the inside of the lamp chamber 3 and the outside, and the pressure change in the lamp chamber 3 can be eliminated. Further, since one opening end side of the grommet 5 bent in a U shape is fitted onto the cylindrical portion 13 and the other opening end of the grommet 5 is attached downward, water is absorbed in the cylindrical portion 13. The grommet 5 prevents the light from entering the lamp chamber 3 through the above.

[0006]

[Problems to be solved by the device]

 However, in the conventional water draining device for a vehicle lamp described above, the grommet 5 is fitted onto the cylindrical portion 13 of the housing 1, and the inside and outside of the lamp chamber 3 are connected via the breathing path formed by the cylindrical portion 13 and the grommet 5. It is possible to perform the breathing action in the lamp chamber 3 because it is connected to each other, that is, only the breathing path is provided, but the water bounces or blows up from below, and the opening below the grommet 5 May enter the lamp chamber 3 through the breathing path composed of the grommet 5 and the cylindrical portion 13. Further, when the moist air is sucked into the lamp chamber 3 by the breathing action, there is a problem that the inner surface of the lamp chamber 3, particularly the inner surface of the lens 2, becomes cloudy.

An object of the present invention is to provide a breathing / draining device for a vehicular lamp having an excellent anti-fog function and a function of quickly discharging water that has entered the lamp chamber to the outside of the lamp chamber. To do.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a light source bulb provided in a lamp chamber defined by a housing and a lens, and a drainage grommet provided on a back wall of the housing through a cylindrical portion. In the device, a tubular portion is integrally provided on the bottom wall of the housing, and a drainage hole is formed on the outer periphery of the tubular portion to provide a closing member for opening and closing the portion. Characterize.

[0009]

[Action]

 According to the structure of claim 1, since the water drainage hole is formed in the outer periphery of the cylindrical portion provided on the bottom wall of the housing, and the water drainage hole is provided with the closing member, the closing member is moved downward. By doing so, water accumulated in the lamp chamber, especially on the bottom wall of the housing, is quickly discharged to the outside.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a state in which a water drain hole of a water drainage device for a vehicle lamp according to the present invention is closed, and FIG. 2 is a sectional view showing a state in which the water drain hole is opened. A light source bulb 4 is arranged via a socket holder 41 in a lamp chamber 3 defined by a housing 1 and a lens 2 arranged on the front surface thereof. In the figure, reference numeral 8 is a sealing material, and reference numeral 9 is a vehicle body panel. The housing 1 has a ventilation wall 12 in which a breathing grommet 5 is fitted to a cylindrical portion 13 on a back wall 11 thereof.

The housing 1 has a cylindrical portion 15 integrally formed by projecting downward from the bottom wall 14. The tubular portion 15 has a drainage hole 17 formed by cutting out the base portion and connecting the tubular portion 15 and the drainage hole 17 to each other. Furthermore, a thread groove (not shown) is provided in the inner diameter of the tubular portion 15, and the tubular portion 15 has a packing 6 and a flange portion 73 for screwing the drainage hole 17 to open it. 72 and the fastening portion 7 provided with the head portion 71 are provided with a closing member.

However, the drainage hole 17 of the present invention having the above-described structure closes the packing 6 through the fastening portion and the collar portion 73 of the packing 7. More specifically, the outer periphery of the cylindrical portion 15 having the water drainage hole 17 is surrounded by the packing 6, and the screw portion 72 is formed so that the tip of the packing 6 is pressed by the collar portion 73 of the fastening portion 7. The drainage hole 17 is closed by tightening the head portion 71 in the thread groove of the groove 15.

When the temperature inside the lamp chamber 3 rises above the ambient temperature by repeating lighting and extinguishing, water accumulates, and the water is a tubular shape provided on the bottom wall 14 of the housing 1 as shown in FIG. The drainage hole 17 in the peripheral wall of the base of the portion 15 is quickly released to the outside by opening the closing member. More specifically, the screw head 71 of the fastening portion 7 which is a closing member is turned to loosen the screw portion 71, and the packing 6 placed on the collar portion 73 descends to open the water drain hole. The water inside is quickly released to the outside.

Not limited to the above embodiment, for example, the packing 6 is made of a material such as sponge packing, and the length of the screw portion 72 of the fastening portion 7 is changed or the degree of tightening is adjusted. However, water may be constantly discharged, and in this case, a fine air passage is formed from the sponge packing through the water drain hole 17 due to the pressure difference, so that exhaust and breathing action can be performed well.

[0015]

[Effect of device]

 As is apparent from the above-described embodiments, in the water draining device of the present invention, the water draining hole is normally closed, and the water draining hole directly enters when the vehicle is washed, etc. Is released and quickly released to the outside.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a drain hole of a drainage device of the present invention is closed.

FIG. 2 is a cross-sectional view showing a state in which a water drain hole of the water drain device is opened.

FIG. 3 is a cross-sectional view of a conventional water draining device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Lens 3 Light room 5 Breathing grommet 6 Packing (blocking member) 7 Fastening part (blocking member) 11 Back wall 12 Vent hole 13 Cylindrical part 14 Bottom wall 15 Cylindrical part 17 Drain hole

Claims (1)

[Scope of utility model registration request] 1. A water draining device in which a light source bulb is arranged in a lamp chamber defined by a housing and a lens, and a breathing grommet is provided on a back wall of the housing through a cylindrical portion, the bottom of the housing. A water draining device for a vehicle lamp, characterized in that a tubular portion is integrally provided on a wall and a water draining hole is formed on an outer periphery of the tubular portion to provide a closing member for opening and closing the portion. .