JPH09161508A - Lighting fixture for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bulb from resonance and prolong the service life of the bulb by holding a holding member at the insertion opening of the bulb, holding the bulb at the holding member, and providing a weight member on an atmosphere side of the holding member via the butter member. SOLUTION: A holding member 14 is fitted to an bulb insertion opening 13b formed on a back wall 13a of a housing 13 and held, and a bulb 15 is held by means of the housing 13 via the member 14. While the bulb 15 is held by means of the member 14, it is inserted from the bulb 15 into the opening 13b and is held by means of the housing 13 via the member 14 in s state in which the bulb 15 is positioned in a lighting chamber 12 by fitting the fitting claws 17c(plural) of a hinder 17. And, the member 14 is held by means of the opening 13b, the bulb 15 is held by means of the member 14, and vibration specific to a vehicle body and a lighting fixture main body is hardly transmitted to the bulb 15 by providing a weight member 26 on the atmosphere side of the member 14 via a buffer member 25. Therefore, resonance of the bulb 15 is prevented, and the service life of the bulb 15 can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which a housing holds a bulb through a holding member.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS. 4 (A) and 4 (B), a rear combination lamp L as a vehicle lamp includes a lamp L1 for a turn signal lamp,
It is known that a lamp L2 for a stop / tail lamp and a lamp L3 for a backup lamp are combined and fixed to a vehicle body (not shown), and a valve 2 is held by a housing 3 via a holding member 1.

In order to fix the rear combination lamp L to the vehicle body, a flange for fixing the vehicle body is formed on the housing 3, and the flange and the vehicle body panel are fixed by bolts and nuts, or the housing 3 is provided. The bracket is fixed, and the bracket and the vehicle body panel are fixed by bolts and nuts, a combination of these, or the like, which is fixed by a known means.

The holding member 1 includes a resin holder 4, a cylindrical metal socket 5 mounted inside the holder 4, an insulator 7 to which one end of wiring cords 6 and 6 for power supply are connected, and an insulator 7. 3, a coil spring 8 for urging the opening side of the wire 3, wire cords 6 and 6 penetrate, and a grommet 9 that secures water tightness to the penetrating portion and the inner peripheral edge of the holder 4, and a seal between the housing 3 and the holder 4. The packing 10 for ensuring the property is provided.

The filament 2a of the bulb 2 extends in the vertical direction of the vehicle body because the illumination direction as a lamp is generally long in the horizontal direction of the vehicle body and short in the vertical direction of the vehicle body. In addition, the valve 2 has a protrusion 1 which is laterally projected from the mouthpiece 2b.
The pair of pins 2c and 2d are held by the holding member 1 by engaging the engaging grooves 5a and 5b of the cylindrical socket 5 with the bias of the coil spring 8.

[0006]

By the way, in the rear combination lamp L as a vehicle lamp constructed as described above, the bulb 2 is held by the holding member 1 fixed to the housing 3 without play.

Therefore, when the filament 2a is deteriorated with time, the valve 2 is caused by the vibrations of the vehicle body, the rear combination lamp L, and the valve 2 which are inherent to the vehicle driving, the vehicle body running, and the vehicle body running. When resonance occurs in the filament, the filament 2a shown in FIG.
However, there is a problem in that the wire breaks as shown in FIG. In FIG. 5 (A), the X-axis indicates the vehicle body left-right direction and the Y-axis indicates the vehicle body up-down direction.

In the case of the rear combination lamp L, this resonance of the bulb 2 is more likely to occur as in the bulb 2 installed inside the vehicle body, and as described above, when the filament 2a extends in the vertical direction of the vehicle body. On the other hand, it is severe in the vertical direction of the vehicle body and the longitudinal direction of the vehicle body, and in particular, it is easy to be adversely affected by the vibration in the vehicle body longitudinal direction.

The present invention has been made in view of the above circumstances, and it is possible to make it difficult to transmit the vibrations peculiar to the vehicle body and the main body of the lamp to the bulb, so that the resonance of the bulb can be prevented and the life of the bulb is extended. An object of the present invention is to provide a vehicular lamp that can be used.

[0010]

In order to achieve the object, the invention according to claim 1 holds a holding member in a valve insertion opening formed in a housing, and the holding member holds the lamp through the lamp insertion opening. The gist is that the valve inserted into the chamber is held and a weight member is provided on the atmosphere side of the holding member via a buffer member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a vehicular lamp of the present invention is applied to a rear combination lamp and will be described with reference to the drawings.

In FIG. 1, a rear combination lamp 11 is formed in a housing 13 and a rear wall 13a of the housing 13 which form a lamp chamber 12 in cooperation with the lens, the front opening of which is closed by a lens (not shown). Holding member 14 that engages with the valve insertion opening 13b,
A valve 15 held by the housing 13 via the holding member 14 and a damper device 16 detachably provided on the atmosphere side of the holding member 14 are provided.

The holding member 14 includes a resin holder 17,
Metal cylindrical socket 1 fitted in holder 17
8, an insulator 20 to which one end of the power supply wiring cords 19, 19, 19 are connected, and a coil spring 2 for urging the insulator 20 toward the open side of the housing 3.
1. Grommet 22, housing 13 and holder 1 that allow wiring cords 19, 19 and 19 to penetrate therethrough and ensure water tightness to the penetrated portion and the inner peripheral edge of holder 17.
7 is provided between the disk-shaped flange portion 17a and the disk-shaped flange portion 17a, and a packing 23 for ensuring the airtightness of the valve insertion opening 13b is provided.

The bulb 15 has a filament 15a for a tail lamp and a filament 15b for a stop lamp. The filaments 15a and 15b extend in the vertical direction of the vehicle because the illumination direction of the lamp is long in the horizontal direction of the vehicle and short in the vertical direction of the vehicle. In addition, the valve 15 has a pair of pins 15d and 15e projecting laterally from its base 15c to engage with the engagement grooves 18a and 18b of the cylindrical socket 18 by the biasing force of the coil spring 21. Held at 14.

As shown in FIG. 1 (B), the damper device 16 includes a pair of blades 17b, 17 formed on a holder 17.
A metal bracket 24 having engaging portions 24a, 24a that engage with b, and a cushioning member 2 provided on an arcuate portion 24b of the bracket 24, as shown in FIGS. 2 (A) and 2 (B).
5, a weight member 26 provided on the buffer member 25 is provided. The members 24, 25, and 26 are integrated by vulcanization bonding (baking after bonding) when molding the buffer member 25.

The buffer member 25 is made of an elastic material such as rubber or soft resin (specifically, chloroprene rubber), and has a hole 25 for adjusting the spring value at an appropriate position.
a, 25a ... Are formed. In addition, the weight member 2
As for 6, a relatively heavy one such as brass is adopted.

In the above structure, the valve 15 is held by the holding member 14 which is assembled in advance. In this state, the holding claws 17c (plurality) of the holder 17 are engaged with the housing 13 by inserting the holding member 14 into the bulb insertion opening 13b from the holding member 14 with the holding member 14 in the lamp chamber 12. It is held in the housing 13 via the.

At this time, the filament 15 of the bulb 15
The a and 15b extend in the vertical direction of the vehicle body.

Next, the damper device 16 is formed by integrally bonding the members 24, 25 and 26 by vulcanization adhesion when molding the cushioning member 25, and the engaging portion 2 is attached to the blade 17b of the holder 17.
The damper device 16 is held by the holding member 14 by engaging 4a.

When vibrations are to be transmitted to the valve 15 by the vibrations of the vehicle body and the rear combination lamps 11 caused by the vehicle body up and down, left and right, and front and back due to the engine start and the vehicle body running, for example, a load directed downward of the vehicle body. When the valve 15 is displaced downward due to the occurrence of
The holding member 1 with the holding portion of the housing 13 as a fulcrum of rotation.
4 is located outside the lamp chamber 12 and tends to be displaced upward. This upward displacement is caused by the weight member 26.
Is suppressed by the weight of the valve, and as a result, vibration transmission to the valve 15 is reduced, and resonance does not occur.

The graph shown by the solid line in FIG. 3 is the damper device 1.
6 shows the relationship between the vibration frequency and the vibration intensity when not provided, and the chain line graph in FIG. 3 shows the relationship between the vibration frequency and the vibration intensity when the damper device 16 is provided.

Then, as shown in FIG. 3, the damper device 1
The vibration of the valve 15 in the case where No. 6 is provided can be about half that in the case where the damper device is not provided, and is in a frequency band (about 350 Hz) of high vibration intensity that can cause disconnection of the filaments 15a and 15b due to resonance. However, it is possible to prevent the vibration intensity from reaching the disconnection.

The vibration absorbing action of the damper device 16 has a spring value of the buffer member 25, a weight of the weight member 26, a mounting position of the damper device 16 and an optical axis direction of the bulb 15 (see FIG. 1A). The length of the rear combination lamp 11 depends on the weight of the rear combination lamp 11, the length of the vehicle body in the width direction, the acceleration of the vehicle, and the like.

At this time, the holes 25a, 25a of the cushioning member 25
Since the spring value can be changed according to the hole diameter and the number of ..., It is possible to provide the damper device 16 having high versatility for the type of lamp, the type of vehicle body, and the like.

[0025]

As described above, in the vehicular lamp of the present invention, the holding member is held in the bulb insertion opening formed in the housing, and the holding member is inserted into the lamp chamber through the bulb insertion opening. Since the bulb to be held is held and the weight member is provided on the atmosphere side of the holding member via the cushioning member, it is possible to make it difficult to transmit vibrations specific to the vehicle body and the lamp body to the bulb. Resonance can be prevented and the life of the valve can be extended.

[Brief description of the drawings]

FIG. 1 shows a vehicular lamp according to an embodiment of the present invention, (A) is an enlarged cross-sectional view of a main part of a rear combination lamp, and (B) is a rear view of (A).

FIG. 2A is a front view of the damper device, and FIG.
FIG. 4A is a cross-sectional view taken along the line AA of (A).

FIG. 3 is a graph showing the relationship between vibration frequency and vibration intensity with and without a damper device.

FIG. 4 shows a conventional vehicular lamp, (A) is a front view of the vehicular lamp, and (B) is an enlarged vertical sectional view taken along the line BB of (A).

FIG. 5A is a front view of the valve with a normal filament, and FIG. 5B is a front view of the valve with a broken filament.

[Explanation of symbols]

 11 ... Rear combination lamp (vehicle lamp) 12 ... Lamp chamber 13 ... Housing 13b ... Valve insertion opening 14 ... Holding member 15 ... Valve 25 ... Buffer member 26 ... Weight member

Claims (2)

[Claims] 1. A holding member is held in a bulb insertion opening formed in a housing, a bulb inserted into the lamp chamber from the bulb insertion opening is held in the holding member, and a bracket is attached to the atmosphere side of the holding member. And a weight member is provided on the bracket via a cushioning member. 2. The bracket includes an engaging portion that removably engages with the holding member, and an arcuate portion along the peripheral surface of the holding member, and the cushioning member along the arcuate portion. The vehicular lamp according to claim 1, wherein the weight member is integrally formed.