JP3136467B2 - Vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel vehicular lamp. More specifically, the present invention relates to a technique for preventing clouding of a reflection surface.

[0002]

2. Description of the Related Art FIG. 9 shows an example a of a conventional vehicular lamp.

A vehicular lamp a has a reflecting mirror e and a bulb f arranged in a lamp chamber d formed by a lamp body b and a lens c.

The lamp body b is opened forward (a leftward direction in FIG. 9 is a forward direction, and a rightward direction is a rearward direction in FIG. 9), and the opening of the lamp body b is a lens c.
The lamp room d is formed by closing with.

At the upper and lower ends of the rear wall of the lamp body b, there are formed communication holes g and g 'for communicating the inside and the outside of the lamp chamber d, respectively.

The reflecting mirror e has a bowl shape opened forward. The reflecting mirror e has a reflecting surface h formed by performing a reflection process on a surface facing forward, and a reflecting means h is formed in the lamp chamber d by appropriate means. It is supported so that it can tilt.

A bulb mounting hole i is formed substantially at the center of the reflecting mirror e, and a bulb f having filaments j and j 'is detachably mounted by appropriate means.

[0008] Thus, the above-described vehicle lamp a is a light bulb f.
The light emitted when one of the filaments j and j 'is turned on is reflected by the reflecting surface h of the reflecting mirror e, and the lens c attached to the front end of the lamp body b is not shown. It is controlled by a lens step or the like.

Then, gas is circulated in the lamp chamber d through the communication holes g and g 'provided in the lamp body b, and the lamp chamber d
In addition to preventing the fogging inside, the fogging is removed when a fogging portion occurs in the lamp room d.

[0010]

However, like a conventional vehicle lamp a, outside air is sucked in from a communication hole g 'provided in a lower portion of a lamp body b, and a communication hole g provided in an upper portion of the lamp body b. In the method of discharging the gas from the lamp chamber d to the outside of the lamp room d, the gas flows as schematically shown by two-dot chain arrows in FIG. 9 and the gas flow hardly touches the reflecting surface h of the reflecting mirror e. When h becomes cloudy or the reflecting surface h becomes cloudy,
There is a problem that it takes a long time to remove the cloud.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vehicular lamp according to the present invention has a ventilation hole communicating between the inside and outside of a reflecting mirror at or near a reflecting surface of the reflecting mirror. And the positions of the ventilation hole of the reflector and the communication hole of the lamp body substantially coincide with each other before and after.

Therefore, according to the vehicular lamp of the present invention, the flow of gas passing through the interior of the reflecting mirror can be created, so that the gas flow can easily come into contact with the reflecting surface of the reflecting mirror, and the reflecting surface can be clouded. Can be prevented, and the time required to remove the fogging once the reflecting surface becomes cloudy can be shortened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the vehicle lamp according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 6 show a first embodiment of a vehicular lamp according to the present invention.

Reference numeral 1 denotes a vehicular lamp in which a reflecting mirror 5 and a bulb 6 are arranged inside a lamp chamber 4 formed by a lamp body 2 and a lens 3.

The lamp body 2 is formed of a synthetic resin or the like in the shape of a bowl, and has a forward direction (a rightward direction in FIG. 2 is a rightward direction, a leftward direction is a leftward direction, and a leftward direction in FIG. 3). Is defined as the front, and the direction toward the right is defined as the rear.) The lens 3 having the concave portion 7 having the lens step and the like (not shown) is attached to the front portion of the lamp body 2. The lamp chamber 4 is formed by closing the recess 7.

An opening 9, communication holes 10, 10 ′, and vents 11, 11 ′ are formed in the rear wall 8 of the lamp body 2.

The opening 9 is formed in the rear wall 8 at a position corresponding to the position of the light bulb 6 disposed in the lamp chamber 4, and is used for replacing the light bulb 6, and is usually a detachable cover member 9a. Is closed by

The communication holes 10, 10 '(only one of them is shown in the drawing) define the interior and exterior of the lamp chamber 4 at the upper right and lower left of the position where the opening 9 of the rear wall 8 is formed when viewed from behind. The ventilation portions 11 and 11 ′ are formed so as to cover the communication holes 10 and 10 ′ on the rear surface side of the rear wall 8.

The communication holes 10, 10 'and the ventilation portion 11,
11 'discharges gas inside the lamp chamber 4 through the communication hole 10 and the ventilation part 11, and inhales gas outside the lamp chamber 4 through the communication hole 10' and the ventilation part 11 '. Just because the structure of each part is the same,
The communication hole 10 and the ventilation portion 11 located on the upper right of the rear wall 8 will be mainly described, and the communication hole 10 'and the ventilation portion 11' located on the lower left of the rear wall 8 will be described with reference to the communication hole located on the upper right of the rear wall 8. Most of the description is omitted by attaching the same reference numerals as those of the same portions in 10 and the ventilation portion 11.

The communication hole 10 has a circular opening surface, and a cylindrical tube portion 12 extending forward and rearward is formed integrally with a rear wall 8 at an opening edge of the communication hole 10. A stopper 13 is formed at the front end of each of the right and left sides so as to cross the center of the opening of the communication hole 10 left and right.

A filter 14 is fitted in the cylindrical portion 12 so as to close the communication hole 11, and the position of the filter 14 is defined by the front end of the filter 14 abutting against the stopper 13 of the cylindrical portion 12.

The cylindrical portion 1 of the communication hole 10 is provided inside the ventilation portion 11.
Are formed to project rearward from the rear wall 8 so as to surround the rear wall 2, thereby forming a maze-shaped ventilation path 16.

The gas in the lamp chamber 4 discharged from the communication hole 10 communicating the inside and the outside of the lamp chamber 4 is supplied to the ventilation section 11.
The air is discharged to the outside through the ventilation path 16. At this time, since the filter 14 is fitted inside the cylindrical portion 12, dust and dirt are prevented from entering the lamp chamber 4 with the flow of gas.

The reflecting mirror 5 has a reflecting surface 17 formed inside the reflecting mirror 5 by performing a reflection process on a paraboloid of revolution, and an upper edge of the reflecting surface 17 which is parallel to the optical axis XX of the reflecting surface 17. , An upper flat surface 18 extending forward from the lower surface, a lower flat surface 19 parallel to the optical axis XX of the reflective surface 17 and extending forward from a lower edge of the reflective surface 17, and an optical axis X of the reflective surface 17. It has a bulb mounting hole 20 formed around -X, and a vent hole 21 formed at the upper right of the bulb mounting hole 20 as viewed from the back.

The ventilation hole 21 is provided on the reflecting surface 17 with the reflecting mirror 5.
A rib 22 is formed in a slit shape at a position along the rear edge of the upper flat surface 18 and extends rearward from the upper opening edge of the ventilation hole 21.

The reflecting mirror 5 is tiltably supported on the lamp body 2 by a supporting mechanism (not shown),
The ventilation hole 21 formed in the reflecting mirror 5 is located in front of the position where the communication hole 10 of the lamp body 2 is formed.

The bulb 6 has filaments 23 and 23 ', and is exchangeably supported by a bulb mounting hole 20 formed in the reflecting mirror 5.

However, in the vehicle lamp 1 described above,
Since the gas is sucked into the lamp chamber 4 and discharged to the outside through the lamp chamber 4 by the communication holes 10 and 10 ′ and the ventilation sections 11 and 11 ′, the lens 3 and the reflection surface 17 may be clouded. Can be prevented, or, once cloudy, can be quickly removed.

The gas inside the reflecting mirror 5 is reflected on the reflecting surface 1.
7 through the air holes 21 formed in the upper part of the
Since the gas is forcibly sucked out through the communication hole 10 of the lamp body 2 which coincides with the front and back of the lamp 1, the gas does not stagnate in the reflecting mirror 5, and the gas flow touches the reflecting surface 17 of the reflecting mirror 5. As a result, the reflection surface 17 is not easily clouded, and even when the reflection surface 17 is clouded, the cloudiness can be quickly removed.

It is desirable that the ventilation hole 21 of the reflection surface 17 and the communication hole 10 of the lamp body 2 be connected. However, since the reflection mirror 5 must be supported to be tiltable with respect to the lamp body 2, The ventilation hole 21 of the reflection surface 17 and the communication hole 10 of the lamp body 2 cannot be connected. Therefore, the amount of gas sucked out of the reflecting mirror 5 is
It may be smaller than the amount of gas passing above the reflecting mirror 5 as schematically indicated by the arrow 24 in FIG. Therefore, by providing a rib 22 on the rear end edge of the ventilation hole 21, the same effect as that of disposing the ventilation hole 21 and the communication hole 10 closer to each other can be obtained, and the gas is released from the inside of the reflecting mirror 5. In addition to increasing the amount of suction, as shown schematically by an arrow 25 in FIG. 4, a swirling gas flow is created at a position directly below the rib 22 (a position immediately behind the ventilation hole 21). The force for sucking gas from the pores 21 is increased.

By increasing the force for sucking out gas from the air holes 21, the size of the air holes 21 necessary for sucking the same amount of gas can be reduced.

Further, by forming the ribs 22, a cooling effect in the vicinity of the ventilation hole 21 can be obtained, and the strength in the vicinity of the ventilation hole 21 can be increased.

Further, by forming the ventilation holes 21 in the reflection surface 17 in a slit shape along the upper flat surface 18 of the reflection mirror 5, the ventilation holes 21 stand out when the reflection surface 17 of the reflection mirror 5 is viewed from the front. Can not be.

The ventilation hole 21 is connected to the optical axis X-
By forming the gas at a position slightly shifted from directly above X, the gas heated by the filaments 23 and 23 ′ of the light bulb 6 is not immediately discharged from the ventilation hole 21, but the optical axis X of the reflection surface 17 is formed. After temporarily moving above -X, the lamp body 2 is discharged from the vent hole 21 while lowering the temperature. Therefore, even when the heat resistance temperature of the lamp body 2 is formed lower than that of the reflector 5, the lamp body 2 is discharged from the vent hole 21. The gas and the like do not deform the vicinity of the communication hole 10 and the ventilation part 11 of the lamp body 2.

FIGS. 7 and 8 show a second embodiment of the vehicular lamp according to the present invention. Compared with the first embodiment, only a part of the reflector is different, and the other parts are different. The same is true. Therefore, only the reflecting mirror is shown and described, and illustration and description of the same parts as in the first embodiment are omitted.

The reflecting mirror 5A has a reflecting surface 17 and an upper flat surface 1.
8, lower flat surface 19, bulb mounting hole 20, ventilation hole 2
1, a rib 22, and a second ventilation hole 26.

The second ventilation hole 26 is located at a position along the rear edge of the lower flat surface 19 immediately below the bulb mounting hole 20 on the reflection surface 17 of the reflection mirror 5A so as to communicate the inside and the outside of the reflection mirror 5A. In a slit shape.

However, as the gas inside the reflecting mirror 5A is sucked out through the ventilation hole 21 formed above the reflecting surface 17, a part of the gas sucked into the lamp chamber 4 through the communication hole 10 '. Is sucked into the reflecting mirror 5A from the second ventilation hole 26 formed in the reflecting surface 17, and the reflecting mirror 5A
A gas flow passing through the inside of the mirror and exiting from the vent hole 21 can be created, and the gas does not stagnate in the reflecting mirror 5A, and the gas flow touches the reflecting surface 17 of the reflecting mirror 5A. As a result, the reflection surface 17 is not easily clouded, and even when the reflection surface 17 is clouded, the cloudiness can be quickly removed. Further, by forming the second ventilation hole 26 along the lower flat surface 19 in a slit shape, the second ventilation hole 26 becomes less noticeable when the reflecting mirror 5A is viewed from the front.

In each of the above embodiments, the air holes 21 and / or the second air holes 26 have been described as being formed in the reflection surface 17. However, for example, the upper flat end surface 18 and / or the lower The ventilation hole 21 and / or the second ventilation hole 26 may be formed near the reflection surface 17 at the rear end of the flat surface 19.

[0041]

As is apparent from the above description, the vehicular lamp of the present invention forms a lamp chamber by covering the front part of the lamp body with a lens, and has a reflecting mirror having a reflecting surface in the lamp chamber. And a light source having a light-emitting portion, and a lamp body provided with a communication hole communicating between the inside and the outside of the lamp chamber, wherein the reflection surface of the reflection mirror or the vicinity of the reflection surface of the reflection mirror is provided. A vent hole communicating the inside and the outside of the reflecting mirror is provided, and the position of the vent hole of the reflecting mirror and the communicating hole of the lamp body substantially coincide with each other.

Therefore, according to the vehicular lamp of the present invention, it is possible to create a flow of gas passing through the inside of the reflecting mirror, so that the gas flow can easily come into contact with the reflecting surface of the reflecting mirror, and the reflecting surface becomes cloudy. Can be prevented, and the time required to remove the fogging once the reflecting surface becomes cloudy can be shortened.

It should be noted that the specific shape and structure of each part shown in each of the above embodiments are merely examples of the embodiment of the present invention, and the technical and technical features of the present invention will be described below. The scope should not be construed as limiting.

[Brief description of the drawings]

FIG. 1 shows a vehicle lamp according to a first embodiment of the present invention together with FIG. 2 to FIG. 6, which is a front view.

FIG. 2 is a rear view.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view of a reflecting mirror.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

7 shows a second embodiment of the vehicular lamp according to the present invention together with FIG. 8, and FIG. 7 is a front view of a reflecting mirror.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 shows an example of a conventional vehicular lamp, and is a longitudinal sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Lamp body 3 Lens 4 Light room 5 Reflector 6 Light bulb (light source) 10, 10 'Communication hole 17 Reflection surface XX Optical axis 18 Upper flat surface (flat surface) 19 Lower flat surface (flat) Surface) 21 vent hole 22 rib 23, 23 ′ filament (light emitting portion) 5A reflector 26 second vent hole

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F21V 31/03 F21S 8/10 F21V 7/00

Claims (5)

(57) [Claims] 1. A lamp room is formed by covering a front portion of a lamp body with a lens, and a reflector having a reflection surface and a light source having a light emitting section are arranged in the lamp room. A vehicle lamp provided with a communication hole communicating between the inside and the outside, wherein a ventilation hole communicating between the inside and the outside of the reflecting mirror is provided near the reflecting surface of the reflecting mirror or near the reflecting surface of the reflecting mirror. A vehicular lamp characterized in that the position of the ventilation hole of the mirror and the position of the communication hole of the lamp body substantially coincide with each other before and after. 2. A flat surface substantially parallel to an irradiation direction is formed at an upper end of the reflecting mirror, and a slit-shaped ventilation hole is formed at a position substantially along a rear edge of the flat surface. The vehicular lamp according to claim 1. 3. A flat surface substantially parallel to an irradiation direction is formed at a lower end of the reflecting mirror, and a slit-shaped second ventilation hole is formed at a position substantially along a rear edge of the flat surface. The vehicle lighting device according to claim 1 or 2, wherein: 4. The vehicular lamp according to claim 1, wherein a rib protruding rearward along the opening edge is provided at an opening edge of the ventilation hole. . 5. The vehicle according to claim 1, wherein the vent hole is formed at a position off the optical axis of the reflecting surface of the reflecting mirror. Lighting fixtures.