JP2014089877A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture that makes it easier to replace desiccant.SOLUTION: A vehicular lighting fixture 1 allows desiccant 13 to be replaced by replacement of a cap member 10, 10A, 10B, or 10C attachable to and detachable from a lamp chamber 6, thereby making it easier to replace the desiccant 13. The desiccant 13 is stored so that it can be agitated by the cap member 10, 10A, 10B, and 10C. Therefore, a plane with which the desiccant 13 contacts with air is changed by being agitated by vibrations of a vehicle, ensuring efficient moisture absorption by the desiccant 13. Accordingly, a front lens 7 or the like is difficult to cause fogging due to water droplets depending on temperature changes.

Description

  The present invention relates to a vehicular lamp attached to a vehicle body.

  As a vehicular lamp that is attached to a vehicle body, a vehicular lamp that includes a front lens, a lamp, and a lamp housing is known. The lamp is housed in a lamp chamber formed by a front lens and a lamp housing. Here, the lamp chamber has a sealed structure to prevent intrusion of water such as rain.

  Even if the lamp chamber is sealed, the moisture released from the components in the lamp chamber and the humidity in the air in the lamp chamber increase. When the humidity in the lamp chamber increases, the front lens or the like is easily fogged by water drops due to temperature changes.

A vehicular lamp is known in which a desiccant is disposed on a lamp chamber side of a back cover that closes and seals a rear opening of a lamp housing in which a light source can be taken in and out, and maintains a dry state in the lamp chamber (for example, Patent Document 1).
Further, a vehicular lamp is known in which a sealing capsule having a desiccant pack fixed with a double-sided tape inside is fitted in an opening of a lamp chamber (see, for example, Patent Document 2).

Japanese Patent No. 4775249 JP 2011-119062 A

  However, when exchanging the desiccant, it is necessary to remove the desiccant itself or the desiccant pack from the attached member and replace it.

  This invention is made | formed in view of such a situation, The objective is to provide the vehicle lamp with which replacement | exchange of a desiccant is easy.

  In order to achieve such an object, a vehicular lamp according to the present invention includes a lamp chamber formed by a front lens and a lamp housing, a light source arranged in the lamp chamber for emitting light, and emitted from the light source. An optical member that irradiates the front lens side with the light, and a cap member that can be attached to and detached from the lamp chamber, and the cap member includes a storage unit in which a desiccant can be stirred, and the desiccant. It has a ventilation part which permeate | transmits air between the said lamp chambers, It is characterized by the above-mentioned.

  In the vehicular lamp of the present invention, the desiccant is inserted into the storage unit and stored in a detachable storage container, and the storage container includes the ventilation unit.

  In the vehicular lamp of the present invention, the storage container is characterized in that a groove portion is formed on a surface in contact with the storage portion.

  In the vehicular lamp according to the present invention, the storage portion is a recess formed in the cap member.

  In the vehicular lamp of the present invention, the storage portion includes a lid portion between the lamp chamber and the outside.

  According to the vehicular lamp having such a configuration, it is possible to provide a vehicular lamp in which the desiccant can be easily replaced. Further, when the desiccant is agitated by vibrations of the vehicle, the surface in contact with the air changes, and moisture absorption by the desiccant can be performed efficiently.

1 is a schematic cross-sectional view of a headlamp device in a first embodiment. (A) is the schematic perspective view seen from the lamp housing side of a lid | cover, (b) is AA sectional drawing in (a). (A) in 2nd Embodiment is a front view of a cap member, (b) is BB sectional drawing in (a). (A) is a storage container 40 front view, (b) is CC sectional drawing in (a). (A) in 3rd Embodiment is the schematic perspective view seen from the lamp housing side of the lid | cover, (b) is DD sectional drawing in (a). (A) in 4th Embodiment is a front view of a cap member, (b) is a rear view, (c) is a side view. EE sectional drawing in Fig.6 (a).

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments (hereinafter, embodiments) for carrying out the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element through the whole description of embodiment.
(First embodiment)
FIG. 1 is a schematic cross-sectional view of a headlamp device 1 as a vehicular lamp in the present embodiment.
The headlamp device 1 includes a discharge bulb 2 and a shade 2A, a socket 3 to which the discharge bulb 2 is detachably attached, and an optical member that reflects light from the discharge bulb 2 and to which the socket 3 is detachably attached. A reflector 4, an extension 5, and a lamp chamber 6 for storing these are provided.

The lamp chamber 6 is formed by a front lens 7 and a lamp housing 8. Further, the lamp chamber 6 is formed with a bulb replacement opening 9 having a circular shape as an opening for replacing the discharge bulb 2.
Further, the headlamp device 1 includes a cylindrical cap member 10 that closes the bulb replacement opening 9 to seal the lamp chamber 6 and has a bottom that is detachable from the lamp chamber 6.

  Since the discharge bulb 2 requires a high voltage for lighting, the discharge bulb 2 is connected to the high voltage generation circuit 30 via the socket 3 and the high voltage cord 20. The high voltage generation circuit 30 includes a start circuit and a stabilization circuit, and is configured to cover the outside with a metal case. The high voltage generation circuit 30 is disposed between the lamp housing 8 and the reflector 4 in the lamp chamber 6.

The reflector 4 reflects light emitted from the light source A toward the front lens 7 and is provided in the lamp chamber 6 so as to be tiltable in the vertical direction and the horizontal direction.
The extension 5 is provided in front of the reflector 4 in the lamp chamber 6 along the peripheral edge shape of the opening.

  The cap member 10 has a storage portion 12 having a ventilation portion 11 between the cap chamber 10 and the lamp chamber 6. The storage unit 12 stores a desiccant 13. Further, a knob 14 is provided to make it easy to remove the cap member 10.

FIG. 2A shows a schematic perspective view of the cap member 10 according to this embodiment viewed from the lamp housing 8 side. FIG.2 (b) is AA sectional drawing in (a). In the schematic perspective view, the ventilation portion 11 is omitted for easy understanding of the structure. Similarly, in the schematic perspective view of the following embodiment, the ventilation portion 11 is omitted.
In FIG. 2, the cap member 10 includes a flexible sealing portion 16 that is in close contact with a convex portion 15 as a fitting portion formed around the bulb replacement opening 9 of the lamp chamber 6. In the present embodiment, the wall of the lamp housing 8 in which the bulb replacement opening 9 is formed may be used as the convex portion 15.

  The cap member 10 includes a cylindrical sealing portion 16 formed along the circumference of the cap member 10. The sealing portion 16 is fixed with the convex portion 15 interposed therebetween. The sealing part 16 has flexibility, and the opening width (inner diameter) of the sealing part 16 is formed smaller than the opening width (outer diameter) of the convex part 15. Therefore, the sealing portion 16 is attached so as to cover the convex portion 15, and the convex portion 15 and the sealing portion 16 are in close contact with each other, and the bulb replacement opening 9 is closed to seal the lamp chamber 6.

Moreover, since the sealing part 16 has flexibility, it can be easily removed from the lamp housing 8 by pulling the knob 14 shown in FIG.
As a material of the sealing part 16, rubber as an elastomer can be used.

The storage portion 12 is formed by a recess 18 surrounded by an inner wall 17 formed in the cap member 10 and a ventilation portion 11 that covers and closes the recess 18.
The ventilation part 11 is attached to the inner wall 17 by welding, adhesion, adhesion, mechanical fitting or the like. Further, the ventilation part 11 prevents the desiccant 13 from flowing into the lamp housing 8 and allows air and moisture to pass therethrough.
The ventilation part 11 only needs to have a hole size that prevents the desiccant 13 from coming out of the storage part 12. Depending on the shape and size of the desiccant 13, paper, non-woven fabric, metal or resin, A net made of ceramic, a PTFE (Poly Tetra Fluoro Ethylene) film, or the like can be used.

The desiccant 13 is accommodated in the accommodating part 12 so that stirring is possible. Stirability means that the mass, particles, powder, etc. of the desiccant 13 are shaken by the vibration of the vehicle and can move freely in the storage unit 12.
As the desiccant 13, a mixture of magnesium chloride and magnesium oxide, calcium chloride, slaked lime, silica gel, or the like can be used. In particular, a mixture of magnesium chloride and magnesium oxide is preferable because it has a high hygroscopic power and expands, solidifies, and retains the absorbed water.
Further, the amount of the desiccant 13 can be appropriately changed according to the capacity of the lamp chamber 6. Specifically, the amount of the desiccant 13 may be increased as the capacity of the lamp chamber 6 increases.

(Second Embodiment)
FIG. 3A is a front view of the cap member 10A according to the present embodiment, and FIG. 3B is a sectional view taken along line BB in FIG.
This embodiment is mainly different from the first embodiment in that a cartridge type storage container 40 is provided.
In addition, the material such as the ventilation part 11 and the desiccant 13 and the attachment method of the ventilation part 11 are the same as those in the first embodiment, and the same method can be used. The same applies to the following embodiments.
Further, the cap member 10A of the present embodiment is a flexible member that is in close contact with the convex portion 15 as a fitting portion formed around the bulb replacement opening 9 of the lamp chamber 6 as in the first embodiment. A sealing portion 16A is provided. The sealing portion 16 </ b> A has a plurality of protrusions 160 </ b> A for improving the adhesion with the convex portion 15 over the convex portion 15. By applying force intensively to the protrusion 160A, the adhesion is improved, and by providing a plurality, the sealing performance is also improved.

  The storage container 40 is stored in the storage portion 12 of the cap member 10A. A protrusion 170A for stopping the storage container 40 stored in the storage unit 12 is formed at the tip of the inner wall 17A of the present embodiment. The protrusion 170A may be formed around the opening of the storage portion 12, or may be partially formed.

FIG. 4A is a front view of the storage container 40, and FIG. 4B is a cross-sectional view taken along the line CC in FIG.
The storage container 40 includes a main body portion 41 in which the desiccant 13 is stored so that it can be stirred, and a ventilation portion 11A that covers and closes the main body portion 41.
In addition, the storage container 40 has a plurality of groove portions 411 formed on the side surface 410 in close contact with the storage portion 12. This is formed so that when the storage container 40 is stored in the storage part 12, air can easily escape from the storage part 12 and the storage container 40 can be easily stored in the storage part 12.

(Third embodiment)
FIG. 5A is a schematic perspective view of the cap member 10B according to this embodiment as viewed from the lamp housing 8 side. FIG.5 (b) is DD sectional drawing in (a).
Although the opening part in 1st Embodiment was the opening part 9 for valve replacement, it is not restricted to this. For example, the opening 9A may be formed on the side surface, bottom surface, and top surface of the lamp housing 8 shown in FIG.
In the case of this embodiment, for example, the opening 9A is formed on the upper surface of the lamp housing 8. Further, a cylindrical boss 15A, which is a convex portion formed toward the outside of the lamp chamber 6, is formed around the opening 9A.

In FIG. 5, the cap member 10B includes a flexible cylindrical sealing portion 16C that is in close contact with the boss 15A.
The sealing portion 16C is fitted in close contact with the outer periphery of the boss 15A. The sealing part 16C has flexibility, and the inner diameter of the sealing part 16C is smaller than the outer diameter of the boss 15A. Therefore, the sealing portion 16C is inserted into the boss 15A so as to spread, and the sealing portion 16C and the boss 15A are in close contact with each other, and the opening 9A is closed to seal the lamp chamber 6.

In the present embodiment, the storage portion 12 </ b> A is formed of the ventilation portion 11, the sealing portion 16 </ b> C, and the lid portion 19.
The ventilation portion 11 is attached from the outside of the lamp chamber 6 so as to hit the convex portion 16D formed along the inner periphery of the cylinder, inside the cylindrical sealing portion 16C.
The lid portion 19 is attached from the outside of the lamp chamber 6 so as to block one side of the cylindrical sealing portion 16C, and the storage portion 12A is formed by the ventilation portion 11, the sealing portion 16C, and the lid portion 19. .
For the lid portion 19, for example, an ABS resin that is a resin plate, other resins, a metal plate, ceramics, or the like can be used. The lid portion 19 is attached to the sealing portion 16C by welding, adhesion, adhesion, mechanical fitting, or the like.

(Fourth embodiment)
FIG. 6A shows a front view of the cap member 10C in the present embodiment, FIG. 6B shows a rear view, and FIG. 6C shows a side view. FIG. 7 is a cross-sectional view taken along line EE in FIG. The cap member 10 </ b> C has a cylindrical shape with a bottom having a schematic shape.
In the present embodiment, as in the third embodiment, for example, the opening 9B is formed on the upper surface of the lamp housing 8 shown in FIG. However, what corresponds to the cylindrical boss 15A which is a convex portion formed toward the outside of the lamp chamber 6 around the opening 9A formed in the second embodiment is not formed.
The cap member 10C of the present embodiment can be formed using, for example, an ABS resin that is a resin, or other resins.

The cap member 10 </ b> C includes a storage portion 12 and a main body 50. In the storage unit 12, a desiccant 13 is stored. The storage portion 12 is formed by a recess 51 formed in the cap member 10 </ b> C and a ventilation portion 11 that covers and closes the recess 51.
Further, the main body 50 is provided with eight convex reinforcing portions 52 formed integrally by resin molding at equal intervals along the outer circumference of the lamp chamber 6 (see FIG. 1).

In addition, the cap member 10C includes an insertion portion 53 that is inserted into the opening 9B. Four claw portions 530 are formed at equal intervals along the circumference of the insertion portion 53 on the lamp chamber 6 (see FIG. 1) side of the insertion portion 53. When the insertion portion 53 is inserted into the opening 9B, the claw portion 530 is formed to have an inclination 531 on the lamp housing 8 side.
The cap member 10 </ b> C has a convex portion 54 formed along the circumference at the base of the insertion portion 53, and the convex portion 54 is provided with one rotary knob 54 that rotates the cap member 10 </ b> C in the circumferential direction. .

The cap member 10C is attached to the opening 9B as follows.
A ring-shaped rubber packing 60 is attached to the outer periphery of the insertion portion 53.
The lamp housing 8 is provided with four grooves (not shown), and the insertion portion 53 is inserted into the opening 9B so that the claw portion 530 fits into the groove.
At this time, the rubber packing 60 is sandwiched between the lamp housing 8 and the convex portion 54.

After inserting the insertion portion 53 into the opening 9B, a finger is put on the rotary knob 54, and the inclined surface 531 of the claw portion 530 is rotated along the lamp housing 8 in the direction in which the cap member 10C advances in the insertion direction. At this time, the distance between the lamp housing 8 and the convex portion 54 is shortened, the rubber packing 60 is slightly crushed, and the opening 9B is sealed by the cap member 10C.
In the present embodiment, a cartridge type storage container may be employed.

The embodiment described above has the following effects.
The desiccant 13 can be replaced by replacing the cap members 10, 10 </ b> A, 10 </ b> B, and 10 </ b> C that can be attached to and detached from the lamp chamber 6, and a vehicular lamp that can easily replace the desiccant 13 can be provided.
Further, since the desiccant 13 is accommodated in the cap members 10, 10A, 10B, and 10C so as to be stirred, the surface of the desiccant 13 in contact with the air changes by being stirred by vibration of the vehicle or the like. The moisture absorption by 13 can be performed efficiently. Therefore, the front lens 7 and the like can be hardly fogged by water drops due to temperature changes.

The present invention is not limited to the embodiment described above.
For example, the size of the cap members 10, 10 </ b> A, 10 </ b> B, and 10 </ b> C can be determined by the amount of the desiccant 13 corresponding to the size of the lamp chamber 6, and is not particularly limited.
Further, the cap members 10, 10 </ b> A, 10 </ b> B, and 10 </ b> C may be provided in the lower portion of the lamp housing 8.
The knob can be provided in any of the second, third, and fourth embodiments.
Further, the vehicular lamp is not limited to the headlamp device 1 and may be a rear lamp, a turn lamp, or the like.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Headlamp device, 2 ... Discharge bulb, 2A ... Shade, 3 ... Socket, 4 ... Reflector, 5 ... Extension, 6 ... Lamp chamber, 7 ... Front lens, 8 ... Lamp housing , 8A ... inner side surface, 9, 9A, 9B ... valve replacement opening, 10, 10A, 10B, 10C ... storage container, 11 ... vent, 12, 12A ... storage portion, 13 ... dry 14 ... Knob, 15 ... Convex, 15A ... Boss, 16, 16A, 16B ... Sealing part, 16C ... Sealing part, 16D ... Convex part, 16D ... Claw part, 16E ... Engagement part, 16F ... contact part, 17 ... groove, 18 ... recess, 19 ... lid part, 20 ... high voltage cord, 30 ... high voltage generation circuit, A ... light source.

Claims (5)

A lamp chamber formed by a front lens and a lamp housing;
A light source arranged in the lamp chamber and emitting light;
An optical member for irradiating the front lens side with the light emitted from the light source;
A cap member removable from the lamp chamber,
The cap member is
A storage part in which the desiccant is arranged so that it can be stirred;
A vehicular lamp, comprising: a ventilation portion that allows air to pass between the desiccant and the lamp chamber. The desiccant is inserted into the storage unit and stored in a removable storage container.
The vehicular lamp according to claim 1, wherein the storage container includes the ventilation portion. The vehicular lamp according to claim 2, wherein the storage container has a groove formed on a surface in contact with the storage unit. The vehicular lamp according to any one of claims 1 to 3, wherein the storage portion is a recess formed in the cap member. The vehicular lamp according to any one of claims 1 to 4, wherein the storage portion includes a lid portion between the lamp chamber and the outside.

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