JPH0645203U - Ventilation structure for automobile headlamps - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a ventilation structure for an automobile headlamp that improves and maintains ventilation performance and effectively prevents dust from entering. [Structure] The valve 3 and the reflector 4 in the housing 1
In a headlamp having a housing 1 and an outer lens 2 attached to the housing 1, a dust removing means 8 is attached to a ventilation hole 6 formed in the housing 1, and air is sucked into the housing 1 through the dust removing means 8. It is the one. The dust removing means 8 includes a case 9 having an inlet 10 and an outlet 11 at the top and bottom, and tubes 12 and 13 connected to the inlet 10 and the outlet 11 inside the case 9, respectively. It is placed so that it is inside.
Due to its inertial force, the dust of harmful size falls in the tubes 12 and 13 and is discharged to the outside from the discharge port 11 as it is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ventilation structure for a headlamp in a vehicle such as a passenger car.

[0002]

[Prior art]

 Headlamps for vehicles such as passenger cars have a so-called breathing structure in which the interior of the lamp communicates with the outside air and air is taken in and out to ventilate the interior of the lamp in order to prevent clouding and other phenomena caused by internal humidity. I have it. FIG. 4 shows a configuration example of a conventional headlamp of this type. In the figure, 1 is a housing, 2 is an outer lens attached to the housing 1, 3 is a bulb, and 4 is a reflector. Further, the housing 1 is provided with a vent hole 5 and a vent hole 6, and the inside of the lamp is communicated with the outside air through the vent holes 5 and 6. That is, the air warmed by the lighting and heat generation of the bulb 3 is discharged to the outside of the lamp through the upper ventilation hole 5, and the air is sucked through the lower ventilation hole 6 to cause the air convection inside the lamp as shown in the figure. (Arrow A) is formed.

Further, a filter 7 made of a sponge material or the like (having a foaming ratio of about 50 times) is mounted in the lower ventilation hole 6, and when air is sucked in through the ventilation hole 6, dust or the like is prevented from entering. I try to prevent it. When dust near the road surface is sucked together with air through the ventilation hole 6, the dust enters the lamp and adheres to the outer lens 2 by the static electricity charged on the resin outer lens 2. However, this may cause deterioration of the lamp performance.

[0004]

[Problems to be solved by the device]

 However, in such a conventional headlamp, the filter 7 may be clogged, and if the filter 7 is clogged, the ventilation performance is deteriorated and the outer lens 2 is easily fogged (lowered fog resistance). . In addition, there is a risk that the housing 1, the outer lens 2 and the like may be melted and damaged due to heat generation (reduction in heat resistance), thus adversely affecting the fogging resistance and the heat resistance.

Conventionally, as a vehicle lamp, for example, in Japanese Utility Model Laid-Open No. 63-191502, a ventilation pipe having a closed end is connected to a ventilation port communicating with the interior of the lamp body, and the ventilation pipe is connected to the front end of the ventilation pipe. It is known that a plurality of breathing holes are formed and a hood is formed to cover the outer circumference of the distal end of the ventilation pipe. Further, Japanese Utility Model Laid-Open No. 2-20204, Japanese Utility Model Laid-Open No. 2-36109, Japanese Utility Model Laid-Open No. 60-170902, and the like disclose this type of automotive lamp, but these have a relatively complicated structure. Has become.

In view of the above points, the present invention has an object to provide a ventilation structure for an automobile headlamp that maintains and improves ventilation performance and effectively prevents dust from entering.

[0007]

[Means for Solving the Problems]

 The ventilating structure for an automobile headlamp according to the present invention is a headlamp in which a bulb and a reflector are housed in a housing and an outer lens is attached to the housing, and a dust removing means is attached to a vent hole formed in the housing. However, the air is sucked into the housing through the dust removing means. In particular, the dust removing means is arranged so that the case having upper and lower inlets and outlets and the tube connected to the case are inside the tube connected to the outlet.

[0008]

[Action]

 According to this configuration, the air warmed by the lighting and heat generation of the bulb is discharged to the outside of the lamp through the upper vent, and the air is sucked through the lower vent, but the lower vent does not. The air is sucked into the housing through the dust removing means. In the dust removing means, outside air is taken in through the upper intake port, and this outside air contains air and dust. Due to its inertial force, the dust drops inside the tube and is discharged to the outside through the discharge port. On the other hand, the air is further sucked into the lamp through the gap between the tube connected to the intake port and the tube connected to the discharge port. In this way, clean air is always drawn into the lamp, and good ventilation performance can be maintained.

[0009]

【Example】

 Hereinafter, based on FIGS. 1 and 3, the same members as those of the conventional example will be denoted by the same reference numerals, and an embodiment of the ventilation structure of an automobile headlamp of the present invention will be described. FIG. 1 shows the overall structure of a ventilation structure for an automobile headlamp according to the present invention. In the figure, 1 is a housing, 2 is an outer lens attached to the housing 1, 3 is a bulb, 4 is a reflector, and 5 and 6 are. Each is a vent. Although these configurations are substantially the same as those of the conventional example, a dust removing means 8 is attached to the vent hole 6.

FIG. 2 shows an example of the structure of the dust removing means 8. In the figure, 9 is a hollow case connected to the ventilation hole 6, 10 is an inlet opening on the upper surface of the case 9, and 11 is a case 9. Is a rubber tube connected to the intake port 10 and hung in the case 9, 13 is a rubber tube connected to the discharge port 11, and the tube 12 is as shown in the figure. And is disposed inside the tube 13. Further, a part of the tube 13 is formed in a tapered shape or the like, and is tapered toward the discharge port 11. The size (diameter size) of the discharge port 11 is set to the minimum necessary size for discharging dust from the intake port 10.

FIG. 3 shows an example of an assembling structure of the dust removing means 8, but the case 9 has a divided structure including an upper main body 9a and a bottom portion 9b. In the illustrated example, four protrusions 14 are provided upright on the bottom portion 9b, and engaging holes 15 that engage with each protrusion 14 are formed in the upper body 9a. When assembling the dust removing means 8, the tube 12 is fitted in the mouth portion 10a of the intake port 10, the tube 13 is fitted in the mouth portion 11a of the discharge port 11, and then the respective protrusions 14 are engaged with each other. The case 9 can be easily assembled by engaging with the hole 15. The case 9 is connected to the vent hole 6 via a rubber tube 16.

According to the ventilation structure of the headlamp for an automobile of the present invention, the air warmed by the lighting and heat generation of the bulb 3 is discharged to the outside of the lamp through the upper ventilation hole 5 and also through the lower ventilation hole 6. Air is drawn in and air convection is created in the lamp. When the air is sucked from the lower vent 6, the vent 6 is sucked into the housing 1 through the dust removing means 8.

That is, in the dust removing means 8, the outside air is taken in through the intake port 10 on the upper side, and this outside air contains air and dust. Due to its inertial force, the dust of harmful size falls inside the tubes 12 and 13 and is discharged to the outside through the discharge port 11 as it is. On the other hand, the air taken in through the intake port 10 is dedusted as described above, further passes through the gap between the tube 12 and the tube 13, and is sucked into the lamp through the ventilation hole 6 through the tube 16.

As described above, according to the present invention, clean air is always sucked into the lamp, and good ventilation performance can be maintained. Incidentally, the same filter effect as the filter 7 described in the conventional example can be obtained, and there is no concern about clogging. Further, the dust removing means 8 has a relatively simple structure and can be assembled easily and easily.

[0015]

[Effect of device]

 As described above, according to the ventilation structure for an automobile headlamp of the present invention, it is possible to reliably prevent the deterioration of the ventilation performance due to the clogging of dust, and the fogging resistance and There are advantages such as improving heat resistance.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a ventilation structure for an automobile headlamp according to the present invention.

FIG. 2 is a perspective view of a dust removing unit relating to the ventilation structure of the automobile headlamp.

FIG. 3 is an exploded perspective view of the dust removing means of FIG.

FIG. 4 is a vertical sectional view showing an example of a conventional automobile headlamp structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Outer lens 3 Valve 4 Reflector 5 Vent hole 6 Vent hole 8 Dust removing means 9 Case 10 Intake port 11 Discharge port 12 Tube 13 Tube 14 Projection piece 15 Engagement hole

Claims (2)

[Scope of utility model registration request] 1. A headlamp comprising a housing, in which a bulb and a reflector are housed, and an outer lens is attached to the housing, wherein a dust removing means is attached to a ventilation hole formed in the housing, and the dust removing means is provided. A ventilation structure for an automobile headlamp, characterized in that ventilation is provided into the housing. 2. The dust removing means comprises a case having an intake port and an exhaust port at the top and bottom, and tubes connected to the intake port and the exhaust port in the case, respectively, and a tube connected to the intake port. Is arranged so as to be inside a tube connected to the discharge port, The ventilation structure for an automobile headlamp according to claim 1, wherein