JP2555482Y2 - Lens structure of vehicle lamp - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp such as a combination lamp, and more particularly to a lens structure of a vehicular lamp in which a plurality of types of lenses are integrally formed by a multicolor molding method.

[0002]

2. Description of the Related Art Conventionally, in a combination lamp in which various lamps having different purposes of use, for example, a tail lamp, a direction indicator lamp, a stop lamp, a backward lamp, and the like are incorporated in one lamp body, a plurality of types of lenses are formed by a multicolor molding method. It has a front lens formed integrally. FIG. 5 is a perspective view of a main part showing a conventional example of a front lens of such a combination lamp. Reference numeral 1 denotes a lamp body and reference numeral 2 denotes a front lens which hermetically covers the front opening of the lamp body 1. The front lens 2 is composed of a first lens 2A and a second lens 2B integrally joined, and the first and second lenses 2A,
2B has different colors because it is used for different lamps. For example, the first lens 2A is colored red when used for tail lights, and the second lens 2B is colored yellow when used for direction indicators. As described above, since the front lens 2 is formed with different colors of the lenses 2A and 2B, it is impossible to perform simultaneous molding with a mold. Therefore, the front lens 2 is manufactured by a conventionally known multicolor molding method. In other words, this multicolor molding method uses the first lens 2 in advance.
A is injection-molded with a first lens-molding mold, and then the first lens 2A is loaded into a second lens-molding mold, and molten resin is injected and filled into the cavity to form a second lens 2B. One front lens 2 is manufactured by integrally joining the first lens 2A. On the back surface of the front lens 2 manufactured in this manner, a joining protrusion 3 is integrally provided at the joint between the first lens 2A and the second lens 2B to increase the joint strength, and a peripheral edge of the back surface is provided. Has a seal leg 5 which is inserted into a seal groove 4 provided in a front opening of the lamp body 1 and is fixed by an adhesive, and is integrally provided over the entire periphery.

[0003]

However, in the lens structure of the above-mentioned conventional vehicle lighting device, since the joining projection 3 is not usually provided at the lens joining portion 6 of the sealing leg 5, the sealing structure is used. When the leg 5 is inserted into the seal groove 4 and fixed with an adhesive, the solvent in the adhesive is
If it is soaked into the lens joint, there is a problem that the strength is reduced and the lens joint 6 is easily cracked.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a method in which a lens joint portion of a seal leg is attached to a lamp body by an adhesive solvent or the like at the time of attachment to a lamp body. An object of the present invention is to provide a lens structure of a vehicular lamp which is free from cracks.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of types integrally formed by a multicolor molding method.
Includes a front lens made of a lens, the front lens
Seat provided on the front opening of the lamp body on the back edge
And the sealing legs inserted into the
Insert the lens joint of this seal leg into the seal groove
Characterized in that it is formed to be thick in a direction orthogonal to .

[0006]

[Action] In the present invention, a lens joint seal leg Shi
Since Lumpur leg portion is formed in the direction <br/> thick perpendicular to the direction to be inserted into the seal groove, which hardly cracks increase the bonding strength of the lens bonding portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a perspective view of an essential part showing one embodiment of a lens structure of a vehicle lamp according to the present invention, FIG. 2 is a front view of the lamp, FIG. 3 is a sectional view taken along the line III-III of FIG. FIG. 4 is an enlarged sectional view of a part A in FIG. 3. In the drawing, the same components as those in FIG. 5 are denoted by the same reference numerals. This embodiment shows an example in which the present invention is applied to a rear combination lamp installed at a rear right corner of a vehicle body.

In FIG. 3, reference numeral 10 denotes a vehicle body;
The interior of the lamp body 1 is partitioned into three lamp chambers 12A, 12B, and 12C. The lamp chamber 12A is a tail and stop lamp lamp chamber, and the lamp chamber 12B is a back lamp lamp. Lighthouse and Lighthouse 1
2C forms a lamp chamber of the turn signal lamp, respectively. The lamp chamber 12A is formed so as to surround the lamp chamber 12B, and two tail-and-stop lamp bulbs 13 and one inner lens 14 are disposed inside the lamp chamber 12A, respectively.
A back lamp bulb 15 is provided in the light room 12B.
C is provided with a turn signal lamp bulb 16 and an inner lens 17. Light room 12A
A rectangular tubular shade 18 that partitions these lamp chambers is provided at the boundary between the lamp chambers 12B and 12B. The shade 18 has a U-shaped groove 20 that opens forward on the front end face of the opening, and the rear end opening is formed on the inner surface of the lamp body 1 with the light chambers 12A and 12A.
It is inserted into a U-shaped groove 21 formed at the boundary of B, and is fixed by ultrasonic welding or the like. Lighthouse 12A and 1
A partition wall 22 protrudes integrally with the lamp body 1 at the boundary with the 2C, and a U-shaped groove 23 is formed on the front end surface thereof.

1 to 3, a front lens 2 covering a front opening of the lamp body 1 has a first lens 24A covering a lamp room 12A and a second lens 24B covering a lamp room 12B.
And a third lens 24C that covers the lamp chamber 12C, and a frame-shaped sealing leg 5 that is integrally formed on the peripheral edge of the rear surface over the entire periphery is formed on the outer peripheral portion of the front end surface of the lamp body 1. The adhesive 25 is inserted into the U-shaped seal groove 4 which is opened forward.
And is mechanically connected and fixed to the lamp body 1 by a lance connection, a set screw and the like (not shown). The first lens 24A is colored red, the second lens 24B is colored white, and the third lens 24C is colored amber. The second lens 24B is provided at the center of the first lens 24A.

The front lens 2 having such a structure is
Since the colors of the first, second, and third lenses 24A, 24B, and 24C are different from each other, as described above, 1
It cannot be molded simultaneously by two dies, but is manufactured by a multicolor molding method. In that case, for example, first, the first lens 24A is injection-molded with a first lens-forming mold,
Next, the first lens 24A is loaded into a second lens molding die, and the second lens 24B is integrally joined to an opening provided at the center of the first lens 24A, and then the first integrally formed first lens 24A is formed. , The second lenses 24A and 24B are loaded into a third lens molding die, and the third lens 24C is
A is integrally formed on one side edge of A. On the back surface of the front lens 2 manufactured in this way, in order to increase the bonding strength between the lenses, a connecting protrusion 3 is integrally provided, and the connecting protrusion 3 is provided at the sealing leg 5 portion. The projection is extended to the joint 6 between the lenses. The joining projection 3 on the back side of the lens body is provided with a U-shaped groove 20 of a shade 18 that separates the lamp chambers 12A and 12B of the lamp body 1.
Is inserted into a U-shaped groove 23 of a partition wall 22 for partitioning the lamp chambers 12A and 12C via a packing 28 (FIG. 4) made of polyurethane or the like, and is fixed by an adhesive (not shown). Note that the lens on the back of the seal leg 5
The extension 3A of the joint protrusion 3 extended along the joint
(FIG. 1) shows the case where the seal leg 5 is inserted into the seal groove 4.
It is thickened in a direction perpendicular to the direction, is inserted into the seal groove 4 together with the seal leg 5, and is fixed by an adhesive 25. In addition, the front lens 2 is formed in an L shape so as to match the shape of the vehicle body corner from the viewpoint of enhancing the design effect, and a part of the front lens 2 is wrapped from the back to the side of the vehicle body to form a wraparound lens. ing.

Thus, in the structure of the front lens 2 having such a configuration, the lens joint portion 6 of the seal leg 5
Since the extension 3A of the joining projection 3 is provided on the lens, the thickness of the lens joining portion 6 is increased, the strength is increased, and the sealing groove 4 is formed.
In this case, the lens joint portion 6 can be securely fixed without being cracked by the solvent or the like of the adhesive 25 when it is inserted into and fixed by the adhesive 25. Further, in the conventional lamps, since no measures were taken to completely prevent the air from flowing between the lamp rooms, if the temperature in a certain lamp room becomes high due to direct sunlight or bulb lighting, the light room inside the lamp room will be reduced. Shade 1 that warmed air partitions between light rooms
8 or through the gap between the partition wall 22 and the front lens 2 and flows into a low-temperature lamp room, and when this air is cooled, there is a problem that the lens becomes cloudy or becomes water droplets and adheres to the inner surface of the lens. In the invention, the light room 12A, 1
Shade 18 and partition wall 22 for partitioning between 2B and 12C
The joint projections 3 of the front lens 2 are inserted and fixed in the U-shaped grooves 20 and 23 of the front lens 2 through the packing 28, so that the air flows between the lamp chambers due to the temperature difference and the fogging of the lens accompanying the air flow. Adhesion of water droplets can be reliably prevented.

In the above embodiment, the case where the extension 3A is formed to extend to the tip of the seal leg 5 has been described.
The present invention is not limited to this, and only the joint base of the seal leg 5 is inserted into the seal groove 4.
Needless to say, the thickness may be increased in a direction perpendicular to the direction .

[0013]

As described above, the lens structure of the vehicle lamp according to the present invention is integrally formed by a multicolor molding method.
The front lens is composed of a plurality of different types of lenses, and is provided at the front opening of the lamp body on the periphery of the back of the front lens.
Seal legs to be inserted into the set seal groove
At the same time, insert the lens joint of this seal leg into the seal groove.
The thickness is formed in the direction perpendicular to the insertion direction of the seal leg, so the joint strength of the lens joint of the seal leg can be increased.
You. Therefore, when the seal leg is inserted and fixed in the seal groove of the lamp body, the joint portion of the lens is not broken or cracked, and the lens can be securely fixed.

[Brief description of the drawings]

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

FIG. 2 is a front view of the lamp.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view of a portion A in FIG. 3;

FIG. 5 is a partially cutaway perspective view showing a conventional lens structure.

[Explanation of symbols]

 1 lamp body 2 front lens 3 joining projection 3A extension of joining projection 4 seal groove 5 seal leg 24A first lens 24B second lens 24C third lens 25 adhesive

Claims (1)

(57) [Scope of request for utility model registration] 1. A multi-layer molding formed by a multicolor molding method.
Equipped with a front lens composed of several types of lenses, and provided on the front opening of the lamp body on the periphery of the rear surface of the front lens .
With the seal legs inserted into the seal groove projecting integrally
Insert the lens joint of this seal leg into the seal groove
A lens structure of a vehicular lamp characterized by being formed thick in a direction perpendicular to the direction .