JPH097408A - Lighting fixture for vehicle - Google Patents

Abstract

PURPOSE: To attain installation in a single operation, and reduce cost by arranging a transparent tube cap to be directly capped on a bulb, and forming plural beads on an inner wall surface of this tube cap. CONSTITUTION: Plural beads 17b and beads 17c are formed on an inner wall surface 17a of a tube cap 17. The beads 17b extend along the optical axis of a bulb 16, and come into contact with a barrel part of the bulb 16. The beads 17c extend in a radial shape from an apex part of the inner wall surface 17a, and come into contact with a top part of the bulb 16. Therefore, these beads 17b and 17c form a space S to communicate with a part between the bulb 16 and an inner wall surface 16a. When the bulb 16 is fitted and installed under a condition where the bulb 16 is installed in a bulb socket 15, the tube cap 17 can be installed in a single operation only by inserting the bulb from its opening end without using a special fixing member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turn signal lamp or a brake lamp in which a light beam emitted from a lens is colored such as a signal lamp, or a light beam emitted from a bulb is partially blocked. The present invention relates to a vehicle lamp such as a head lamp or a fog lamp emitted from a lens.

[0002]

2. Description of the Related Art Conventionally, for example, a turn signal lamp mounted on the front side of a vehicle body has a transparent lens in order to have a sense of unity with the lens of an adjacent headlamp. Are known.

FIG. 3 shows an example of such a turn signal lamp 1, 2 is a housing, 3 is a lens, 4 is a bulb held in the housing 2 through a bulb socket 5, and 6 is a predetermined interval. Is an amber cap that covers the valve 4.

The amber cap 6 is made of an orange transparent material so that the light beam emitted from the bulb 4 becomes orange. Further, the amber cap 6 is fixed to the housing 2 by fixing means 7 such as a plurality of screws.

[0005]

By the way, in the vehicular lamp constructed as described above, the amber cap 6 is used to color the luminous flux emitted from the bulb 4, and the amber cap 6 is fixed. Since it is fixed to the housing 2 by means of 7, it is necessary to secure a space for fixing the amber cap 6, which not only makes it difficult to downsize the lamp, but also increases the cost of parts of the fixing means 7 and the tightening work cost. There was a problem of rising prices.

Therefore, it is conceivable to apply a colored coating to the glass portion of the bulb 4, but when such a coating treatment is applied, there is a new problem that color unevenness occurs.

The present invention has been made in view of the above circumstances, and not only enables downsizing of the lamp body, but also
An object of the present invention is to provide a vehicular lamp that can be attached at a low cost by using one fixing device without using a separate fixing means and can prevent the occurrence of color unevenness.

[0008]

In order to achieve the object, the invention according to claim 1 is provided with a bulb held in the lamp body, and a transparent tube cap directly fitted to the bulb. In addition, the gist is that a plurality of beads are formed on the inner wall surface of the tube cap.

[0009]

In the above-mentioned structure according to claim 1,
The bulb is held by the lamp body, and a transparent tube cap having a plurality of beads formed on the inner wall surface is directly fitted to the bulb.

[0010]

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

In FIG. 2, a vehicular lamp 11 includes a housing 12, a lens 13 that closes a front opening 12a of the housing 12, a sealing member 14 that seals between the housing 12 and the lens 13, and a bulb socket 15. Valve 16 held in the housing 12 via the
6 and a tube cap 17 that is directly fitted.

The tube cap 17 is made of a uniform colored and transparent material (for example, orange color) having no color unevenness by using a colored and transparent resin material for molding the tube cap 17. Also, FIG.
As shown in (A) and (B), a plurality of beads 17b, 17b ... And beads 17c, 17c ... Are formed on the inner wall surface 17a of the tube cap 17.

The bead 17b extends along the optical axis P of the bulb 16 as shown in FIGS.
It contacts the body of No. 6. Also, the bead 17b is the inner wall surface 1
Several lines (two lines in the drawing) are formed at a plurality of positions (four positions in the drawing) of 7a.

The position and the number of the beads 17b are not particularly limited, but the adjacent beads 17b, 1
By forming the groove 17d that is open at the front and rear in the optical axis direction at 7b, the groove 17d is not separated by the beads 17b, 17b and does not become a space in which the heat of the bulb 16 is retained.

The beads 17c extend radially from the apex of the inner wall surface 17a and come into contact with the top of the valve 16. Further, the beads 17c are independent from each other so as to form the open portion 17e, and are also protrusions independent of the bead 17b.

Therefore, these independent beads 17b,
When the tube cap 17 is attached to the valve 16, 17c forms one space S that communicates between the valve 16 and the inner wall surface 16a.

In the above structure, the tube cap 1
7, the bead 17b opens along the optical axis P and forward and backward,
Beads 17c extend radially independently and beads 17b
Since they are independent of each other, molding can be performed without using a complicated mechanism such as a slide mechanism in the molding die. Therefore, even if the valve 16 is relatively small, a corresponding molded product can be easily obtained.

The tube cap 17 thus formed is fitted to the valve 16 with the valve 16 mounted on the valve socket 15.

At this time, the tube cap 17 has a valve 16 from its open end without using a special fixing member.
Since it can be attached with one touch just by inserting, mechanization is also possible. Also, the tube cap 17
As shown in FIG. 1 (C), the end face of the valve socket 1
5 is set so as to abut.

Further, the tube cap 17 assembled in this manner transmits the light flux emitted by the lighting (blinking) of the bulb 16 in a colored state due to its colored and transparent characteristic, thereby functioning as a signal lamp.

At this time, the valve 16 and the tube cap 1
A space S is formed between the inner wall surface 17a of 7 and the beads 17b and 17c, and the space S is formed in the groove 17d.
In addition, since the open portion 17e communicates with the space S, convection occurs in the space S, and when the bulb 16 is turned on, heat of a higher temperature portion that is generated forward (top side) than a filament (not shown) is generated. The space S can be made uniform, and deterioration or peeling of the tube cap 17 due to concentrated heat can be prevented.

By the way, in the above-mentioned embodiment, the tube cap 17 is disclosed as an example using an orange colored transparent one. However, in addition to such a signal light, for example, a bulb 16 is provided in a part of a colorless transparent tube cap. It can also be applied to a head lamp or a fog lamp as a shade provided with a light shielding film that blocks a light beam emitted from the.

[0023]

As described above, the vehicular lamp of the present invention is provided with the bulb held by the lamp body and the transparent tube cap directly fitted to the bulb, and the tube. By forming a plurality of beads on the inner wall surface of the cap, not only can the size of the lamp main body be reduced, but also an inexpensive one can be mounted with one touch without using a separate fixing means. Moreover, it is possible to prevent the occurrence of color unevenness.

[Brief description of drawings]

1A and 1B show a vehicle lamp of the present invention, in which FIG. 1A is a sectional view of a tube cap, FIG. 1B is a rear view of the tube cap, and FIG. D) is a rear view of the valve with the tube cap attached.

FIG. 2 is likewise a sectional view of a vehicle lamp.

FIG. 3 is a cross-sectional view of a conventional vehicle lamp, showing the vehicle lamp.

[Explanation of symbols]

 11 ... Vehicle lamp 16 ... Valve 17 ... Tube cap 17a ... Inner wall surface 17b ... Bead 17c ... Bead

Claims (1)

[Claims] 1. A bulb provided on a lamp body and a transparent tube cap directly fitted to the bulb, and a plurality of beads are formed on an inner wall surface of the tube cap. Characteristic vehicle lighting.