JPH1064311A - Vehicle lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regulate the slippage of a bar-like light source and prevent the dropping-out of the bar-like light source by providing a holder for holding the bar-like light source by a light source holding part having a diameter smaller than the diameter of the bar-like light source and a holding frame for holding the holder. SOLUTION: A lens 15 has a substantially U-shaped section opened in the reverse direction to a housing 12, and has a rib 15a integrally protruded thereon to form the holding frame of a holder 16. The engaging groove 16c of the holder 16 is engaged with the notch part 15b of the lens 15, and the groove width is set smaller than the thickness of the rig 15a, whereby the engaged state is made firm when the holder 16 is installed to the lens 15 so that the dropping-out or shaking of the holder 16 can be prevented. The diameter of the light source holding part 16b of the holder 16 is set smaller than the diameter of a bar-like light source 17, whereby the holding of the light source 17 can be ensured, so that the slippage laid along the axial direction of the light source 17 accompanying the vibration of a car body can be prevented when a vehicle lighting tool 11 is mounted. The slippage is prevented, whereby the dropping-out of the light source 17 from the holder 16 can also be prevented.

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 having a light source of a rod shape.

[0002]

2. Description of the Related Art Hitherto, for example, a vehicular lamp such as a high-mount stop lamp for displaying a signal to a following vehicle by lighting a light source in conjunction with depression of a brake pedal has a rod-shaped light source. There has been adopted one (see Japanese Patent Application No. 7-121837).

FIG. 7 shows an example of such a vehicular lamp 1 (the whole drawing is omitted), 2 is a lens (or housing) as a holding frame, 3 is a rod-shaped light source, and 4 and 5 are lenses 2
And a holder for holding the rod-shaped light source 3.

A plurality of stopper pieces 3b, 3b,...
When the rod-shaped light source 3 is inserted in the holder 4, the holder 4 is prevented from coming off.

[0005]

By the way, in the vehicular lamp 1 constructed as described above, although the rod-shaped light source 3 has a sufficient effect of preventing the rod-shaped light source 3 from coming off, the rod-shaped light source 3 caused by the vibration of the vehicle body and the like can be obtained. The displacement along the axial direction could not be restricted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a vehicular lamp capable of restricting a deviation of a rod-shaped light source and thus preventing a rod-shaped light source from falling out. Aim.

[0007]

In order to achieve the object, according to the present invention, a rod-shaped light source and a holder for holding the rod-shaped light source with a light source holding portion having a diameter smaller than the diameter of the rod-shaped light source are provided. And a holding frame body for holding the holder in a positioned state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a vehicular lamp according to the present invention will be described with reference to the drawings, applied to a high-mount stop lamp.

In FIG. 5, a high mount stop lamp 11 is held via a screw 9 and a bracket 10 on an air spoiler 8 fixed to a vehicle body 6 via fixing means 7.

The high mount stop lamp 11
As shown in FIGS. 1 and 2A and 2B, a housing 12 held by an air spoiler 8 and a housing 1
2, a light source lighting circuit unit 13, a reflector 14, and a lens 15 held by the lens 2, and a rod-shaped light source 17 such as an incandescent bulb or a discharge tube held by the lens 15 via a holder 16.
And

The housing 12 has a main body 12a having a substantially U-shaped cross section, and a mounting rib 12b protruding from the back of the main body 12a. A screw hole 12c formed in the mounting rib 12b has a screw hole 12c. When the housing 9 is inserted, the housing 12 is fixed to the air spoiler 8.

The surface 14a of the reflector 14 has an arc shape,
It has an elliptical, parabolic shape, and is provided with a reflective coating (not shown) for reflecting the illumination light flux emitted from the rod-shaped light source 17 toward the lens 15.

The lens 15 has a substantially U-shaped cross section that opens in the opposite direction to the housing 12, and as shown in FIG. 3, the center in the longitudinal direction and the inner wall surface at a distance L1 from the center. Are integrally formed so as to protrude, and form a holding frame of the holder 16. An arc-shaped notch 15b is formed at each end of the ribs 15a.

The holder 16 is made of a relatively elastic, transparent, colored (similar color to the lens 15) or colorless transparent rubber, for example, acrylic rubber or silicon rubber. As shown in FIG. An insertion opening 16a and a perfect circular light source holder 16 communicating with the light insertion opening 16a.
b has a substantially C-shape in side view, and a substantially U-shaped engagement groove 16c is formed on the outer peripheral surface thereof. It is more preferable that the holder 16 be made of silicon rubber which is easily elastically deformed and has excellent heat resistance.

The facing width of the open ends of the light source insertion / opening portion 16a is variable depending on the material characteristics of the holder 16, so that the rod-shaped light source 17 can be inserted into the light source holding portion 16b.

The diameter L2 of the light source holding portion 16b is set to be slightly smaller than the diameter of the rod-shaped light source 17, whereby a high holding force for the rod-shaped light source 17 is ensured. By forming the holder 16 of silicon rubber, the adhesion between the light source holding portion 16b and the rod-shaped light source 17 is good, and the holding force can be further increased.

The engaging groove 16c engages with the notch 15b, and its groove width L3 is set smaller than the thickness L4 of the rib 15a. Accordingly, when the holder 16 is mounted on the lens 15, the engagement state of the engagement groove 16 c by the rib 15 a becomes strong, and the holder 16 is prevented from falling off and backlash. Further, by forming the engagement groove 16c at the center in the thickness direction of the outer peripheral surface, the engagement position of the holder 16 with the rib 15a can be fixed, and the holding and positioning of the rod-shaped light source 17 to the lens 15 can be performed. Not only can it be performed easily and accurately, but also a common holder 16 can be realized.

The bottom wall 16d of the engaging groove 16c is notched 1
By making the arc shape larger than the diameter of the arc shape of 5b, the pressure when the bottom wall 16d is engaged with the notch 15b is applied to the light source holding portion 16b, and the pressure holds the rod-shaped light source 17 by this pressure. The power can be even higher.

In the above configuration, the light source circuit unit 13 is mounted on the housing 12 to assemble the vehicular lamp 11.
In addition to mounting the reflector 14, the rod-shaped light source 17
After the holder 16 is engaged with the lens 15, the holder 16 is held by the lens 15, and then the lens 15 is held by the housing 12. Note that the reflector 14 may be held by the lens 15.

At this time, the holder 16 is
By making the diameter L2 of b smaller than the diameter of the rod-like light source 17, the rod-like light source 17 can be reliably held,
The displacement of the rod-shaped light source 17 along the axial direction due to the vibration of the vehicle body or the like when the vehicle lighting device 11 is mounted can be prevented. Done.

When the incandescent bulb is used as the rod-shaped light source 17, the above-described light source lighting circuit unit 13 is not required. Therefore, as shown in FIG. Lighting fixture 2
It can be 1. Incidentally, even when a discharge tube is used as the rod-shaped light source 17, for example, the light source lighting circuit unit 1 may be used.
Even when the lamp 3 is provided in the air spoiler 8 and is separate from the lamp main body, a compact vehicle lamp 21 as shown in FIG. 6 can be obtained. In FIG.
The other configuration is the same as that of the above-described vehicular lamp 11, so the same reference numerals are given and the description is omitted.

As described above, in the vehicular lamp 11 of the present invention, the rod-shaped light source 17 is held by the light source holding portion 16 b having a diameter smaller than the diameter of the rod-shaped light source 17 formed in the holder 16, and the lens 15 By holding the holder 16 in the positioning state on the rib 15a, the displacement of the rod-shaped light source 17 along the axial direction can be regulated, and thus the rod-shaped light source 17 can be prevented from coming off.

The rib 15a is formed at the center in the longitudinal direction of the lens 15 and at a position separated by a distance L1 from the center of the lens 15 and the center of the rib 15a in the thickness direction and the center of the holder 16 in the thickness direction. Since the engagement relationship is the same, the rod-shaped light source 17 can be easily positioned with respect to the lens 15.

Further, by making the diameter of the bottom wall 16d of the holder 16 smaller than the diameter of the notch 15b of the rib 15a, a tightening force is generated in the light source holding portion 16b, and the holding force of the rod-shaped light source 17 is further increased. And the effect of preventing displacement can be improved.

Moreover, since the width L3 of the engagement groove 16c of the holder 16 is made smaller than the thickness L4 of the rib 15a, the holding force of the holder 16 by the rib 15a can be secured.

If silicon rubber having high heat resistance is used for the holder 16, a high power type light source can be used for the bar-shaped light source 17, and heat conduction to the lens 15 and the reflector 14 can be suppressed to a low level. Moreover, the ribs 15a and the holder 16 are integrally formed with the lens 15 because the holder 16 has a light-transmitting property. Can be.

[0027]

As described above, in the vehicular lamp according to the present invention, a rod-shaped light source and a holder for holding the rod-shaped light source with a light source holding portion smaller in diameter than the diameter of the rod-shaped light source are provided.
By providing the holding frame for holding the holder in the positioned state, the displacement of the rod-shaped light source can be regulated, and thus the rod-shaped light source can be prevented from coming off.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of a vehicle lamp according to an embodiment of the present invention.

FIG. 2A is an exploded side view of a main part, and FIG. 2B is a longitudinal sectional view of the main part.

FIG. 3 is a sectional view of a main part showing a relationship between a lens, a holder, and a rod-shaped light source.

FIG. 4 is an enlarged perspective view of the holder.

FIG. 5 is a sectional view showing a state in which the vehicle lamp is mounted on the air spoiler.

FIG. 6 is a longitudinal sectional view showing a main part of a vehicle lamp according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a main part of a conventional vehicle lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Lamp for vehicles 15 ... Lens (holding frame) 15a ... Rib 16 ... Holder 16b ... Light source holding part 17 ... Rod-shaped light source

Claims (1)

[Claims] 1. A light source comprising: a rod-shaped light source; a holder for holding the rod-shaped light source in a light source holding portion having a diameter smaller than the diameter of the rod-shaped light source; and a holding frame for holding the holder in a positioned state. Vehicle lighting device.