JPH11232905A - Lighting fixture for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture for a vehicle which facilites the assembly of a front face lens on a lamp body and moreover which hardly causes looseness to an engagement portion between the front face lens and the lamp body. SOLUTION: This lighting fixture for a vehicle is constructed such that a sealing groove 14 is provided around a front face opening of a container- shaped lamp body 10, which opens from the front to the side and a sealing leg 22 provided around a front face lens 20 is engaged with the sealing groove 14, thereby forming a lighting chamber (S) accommodating a light source 12 and crossing the direction engaging the sealing legs 22c, 22d with the sealing grooves 14c, 14d facing thereto across the lighting chamber (S) from each other. The engagement of the sealing leg with the sealing groove is facilitated by bending at least one portion 15 of an inner wall front edge of the sealing groove 14c, which faces the other groove across the lighting chamber (S) from each other and has cross-engaging direction with the sealing leg. In addition, the groove width of the sealing groove 14 can be smaller by reducing a turning radius (R) of the front face lens (sealing leg) when the sealing leg is engaged with the sealing groove, which permits the gap of the engagement portion between the sealing leg 22 and the sealing groove 14 to be smaller.

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 clearance lamp, a turn signal lamp, a side marker lamp, a cornering lamp, and the like, in which the directions of engagement of seal legs in sealing grooves opposed to each other across a lamp chamber intersect.

[0002]

2. Description of the Related Art As shown in FIG. 6, a lamp body 1 equipped with a bulb 3 has a front opening opening from the front (lower side in FIG. 6) of a vehicle 8 (right side in FIG. 6). ), And a front lens 4 in which a seal leg 5 is engaged with the seal groove 2 is attached to the opening. The front lens 4 has a shape in which a horizontal cross section is curved to be convex forward and goes from the front to the side so as to be flush with the front surface 8a and the side surface 8b of the vehicle. The opening direction of 2 is substantially perpendicular to the surface of the front lens 4 (configured so that the direction of engagement of the seal groove and the seal leg is not parallel but intersect), and is viewed from the front of the vehicle (the lower side in FIG. 6). Light is applied to a wide area on the side of the vehicle (right side in FIG. 6).

In order to mount the front lens 4 on the lamp body 1, a sealing material 6 is loaded into the sealing groove 2, and first, as shown by the imaginary line in FIG. 5a is engaged with the seal groove 2a, and then, as shown by the arrow, the front lens 4 is rotated around this engagement portion to seal the seal leg 5b at the lamp side edge on the outer side in the vehicle width direction. It is designed to engage with the groove 2b.

[0004]

However, in the conventional structure described above, in order to allow the front lens 4 to be smoothly assembled, the structure is such that the seal leg 5 and the seal groove 2 can be engaged with a margin. In this case, a sufficient gap in the groove width direction is provided between the seal leg 5 and the seal groove 2, so that the engagement between the front lens 4 and the lamp body 1 is likely to be loose. On the other hand, it is necessary to reduce the gap in the groove width direction between the seal leg 5 and the seal groove 2 in order to prevent rattling in the engagement portion between the front lens 4 and the lamp body 1. In this case, There was a problem that the front lens 4 could not be smoothly assembled.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to easily attach a front lens to a lamp body and to cause backlash in an engagement portion between the front lens and the lamp body. It is to provide a vehicular lamp which is difficult.

[0006]

In order to achieve the above object, in a vehicle lamp according to the present invention, a seal groove is provided around a front opening of a container-like lamp body which opens from the front to the side. A light chamber for accommodating the light source is defined by a seal leg provided around the front lens being engaged with the seal groove, and the engagement direction of the seal leg in the seal groove opposed to the light chamber. Are intersecting with each other, at least a part of the front edge of the inner wall of the seal groove facing the lamp chamber and intersecting the engagement directions of the seal legs is bent toward the lamp chamber. It is what was constituted. When the front end of the seal leg is engaged with the seal groove on the side where the bent portion is not formed, and the front end of the opposing seal leg is engaged with the bent portion of the opposing seal groove to press the front lens, While the opposing seal legs slide along the bent portion, the upper, lower, left and right seal legs are inserted along the inner wall of the seal groove, and the seal legs are engaged with the seal groove. The provision of the seal legs facilitates engagement of the seal legs with the seal grooves. Since the front edge of the inner wall of the seal groove is bent toward the lamp chamber, the turning radius of the front lens (seal leg) when the seal leg is engaged with the seal groove can be reduced. The width of the groove can be reduced, and the gap between the seal leg and the engagement portion between the seal grooves can be reduced accordingly. Claim 2
In the vehicular lamp according to claim 1, a seal material is filled between the seal groove and the seal leg,
The base of the bent portion is configured to be located closer to the seal groove opening side than the sealing material filling position. Since the sealing material filling area is limited to the area where the width of the seal groove is constant,
The seal length in the seal groove transverse direction becomes constant in the seal groove length direction. According to a third aspect of the present invention, in the vehicle lighting device according to the first or second aspect, the bent portion is configured to extend to a position where the direct light from the light source to the seal leg is blocked. When the light from the light source shines directly on the seal legs, the light guided inside the seal legs by the light guide function is emitted from the front lens, and the peripheral edge of the front lens partially shines. However, since the direct light directed toward the seal leg is blocked by the bent portion, there is no variation in the light emission of the front lens when the lamp is turned on.

[0007]

Next, embodiments of the present invention will be described based on examples.

FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of a cornering lamp according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the lamp (FIG. 1). Show line II
3 is a horizontal cross-sectional view of the lamp (cross-sectional view taken along line III-III shown in FIG. 1), and FIG. 4 is a horizontal cross-sectional view of the lamp (line IV-IV shown in FIG. 1). Sectional view along)
FIG. 5 is a sectional view showing a procedure for assembling the front lens to the lamp body.

In these figures, reference numeral 10 denotes a vehicle body 5.
0 (see FIG. 3).
The lamp body 10 is a container-shaped synthetic resin lamp body having an opening that opens from the lower side to the side (the right side in FIG. 3). The bulb insertion hole 10a (see FIG. 2) provided in the lower wall of the lamp body 10 has A lamp 12 as a light source is inserted therein, and a lamp body 10 has a front opening formed therein, as shown in FIG.
A front lens 20 made of a clear synthetic resin having a shape curved from the headlamp 60 provided on the front surface 50a of the vehicle body 50 so as to be flush with the side surface 50b of the vehicle body 50 and wrapped around from the front surface to the side surface of the vehicle body 50 is attached. ing.

On the inner peripheral surface of the lamp body 10, there is formed a paraboloid-shaped reflecting surface 11 which has been subjected to a coating process. On the back surface of the front lens 20, a fish-eye step 21 which is a diffusion step is provided. Twelve direct rays of this fisheye step 2
The light is diffused in the vertical and horizontal directions by 1 and is distributed.

A seal groove 14 having a U-shaped cross section is provided around the periphery of the rectangular front opening of the lamp body 10 when viewed from the front, and the front lens 20 is inserted into the seal groove 14 in which the seal material 13 is loaded. Are engaged with each other, and a lamp chamber S is defined by the lamp body 10 and the front lens 20.

The right and left seal grooves 14a and 14b vertically facing each other across the lamp chamber S open in parallel in the horizontal direction as shown in FIG. As shown in FIG. 3, the extending seal grooves 14 c and 14 d are such that the seal groove 14 c on the inner side in the vehicle width direction is opened in parallel with the axle, and the seal groove 14 d on the outer side in the vehicle width direction is the seal groove 14.
The structure is such that it is opened so as to intersect with the opening direction of c.

On the other hand, the seal grooves 14 (14a, 14b, 1)
4c, 14d) and the sealing legs 22 (22a, 22)
b, 22c, 22d) are the seal legs 22 in the seal groove 14.
Are engaged in the seal grooves 14 (14a, 14a).
b, 14c, 14d). That is, upper and lower seal legs 22a, 22 extending left and right.
b extends parallel to the horizontal direction, and the seal legs 22c on the inner side in the vehicle width direction and the seal legs 22d on the outer side in the vehicle width direction intersect in the extending direction. In other words, the engagement direction of the seal groove 14c (14d) and the seal leg 22c (22d) facing left and right across the lamp chamber S is not parallel but crosses.

The seal groove 14c on the inner side in the vehicle width direction.
3 is bent toward the lamp room S side as shown in FIG. 3 to assemble the front lens 20 into the lamp body 10 (the seal groove 14 of the seal leg 22c).
c).

That is, the front lens 20 is connected to the lamp body 10
As shown in FIG. 5, the front end of the seal leg 22d on the outer side in the vehicle width direction of the front lens 20 is engaged with the seal groove 14d. By rotating in the direction of the arrow in FIG. 5 (clockwise direction), the seal leg 22c on the inside of the front lens 20 in the vehicle width direction is engaged with the seal groove 14c. If it is straight, the seal leg 22c on the inner side in the vehicle width direction is used.
Is located at a position 22c 'indicated by a virtual line in FIG. 5 which does not interfere with the inner wall of the seal groove, and the seal groove 14c on the inner side in the vehicle width direction is indicated by a reference numeral 14
The position is c '. For this reason, the front lens 20 is pushed in and the seal grooves 14 (14a, 14b, 14c ',
d) Sealing legs 22 (22a, 22b, 22c ', 22)
In the mode in which d) is engaged, the gap in the groove width direction between the seal legs 22c 'and 22d and the seal grooves 14c' and 14d is large,
Accordingly, there is a problem that the engaging portion between the front lens 20 and the lamp body 10 is apt to rattle in the left-right direction, or the lamp body 10 is enlarged in the left-right direction due to the large width of the seal groove 14c '.

In this embodiment, the turning radius R of the front lens 20 (see FIG. 5) is reduced by providing the bent portion 15 at the front edge of the inner wall forming the seal groove 14c on the inner side in the vehicle width direction. The seal leg 22c formed on the inner side in the left-right direction with respect to the seal leg 22c 'can be engaged.
The groove width of the seal groove 14c with which the groove is engaged may be smaller. Therefore, the seal legs 22c and 22d and the seal groove 14
Since the gap in the groove width direction between c and 14d is small, the engaging portion between the front lens 20 and the lamp body 10 is less likely to rattle in the left-right direction. Further, the lamp body 10 is also reduced in size in the left-right direction, since the width of the seal groove 14c may be small.

The bent portion 15 is formed at a position higher than the interface of the seal material 13 filled in the seal groove 14, and the depth of the seal material 13 is set to the seal leg 22 and the seal groove 1.
It is the same in the entire area between the four engaging portions (the length direction of the seal groove 14). That is, when the interface of the filling seal material 13 extends to a part of the extension portion 15, the seal groove has a large width at the bent portion 15 forming position, and thus the sealing material in the bent portion 15 forming region is not formed. The depth is lower than other areas,
Although there is a possibility that the sealing property in the area where the extension 15 is formed may be deteriorated, but since the interface of the filling sealing material 13 does not cover the extension 15, the entire area of the engagement portion between the seal leg and the seal groove (length of the seal groove 14 Direction), the same sealing material depth, that is, uniform sealing performance is secured.

Further, the bent portion 15 extends to a position where the direct light of the bulb 12 toward the seal leg 22c is blocked, and there is no problem that the front lens 20 partially shines. That is,
When the light source light is directly radiated to the seal leg 22c, the light guided inside the seal leg 22c by the light guiding action is emitted from the front lens 20, and the periphery of the front lens 20 partially shines strongly. Although the dispersion may occur, the direct light traveling toward the seal leg 22c is blocked by the bent portion 15, so that the light emission of the front lens 20 when the lamp is turned on does not vary.

Further, reference numeral 30 in FIGS.
Is a concave / convex lance engaging portion composed of a convex portion 24 protruding from the outer surface of the seal leg 22c of the front lens 20 and an engaging hole 17 provided at a position corresponding to the convex portion 24 of the seal groove forming outer wall 16. , And are provided at two locations above and below. When the seal leg 22c is engaged with the seal groove 14c, the concave / convex lance engagement portion 30 is engaged (the protrusion 24 on the seal leg 22 side is engaged with the seal groove 14c).
Side), the seal leg 22 is prevented from falling out of the seal groove 14. Reference numeral 40 in FIG. 4 denotes a screw fixing portion between the lamp body 10 and the front lens 20, which is provided at two locations above and below. The boss on the front lens 20 side is fixed to the bottom of the seal groove 14 by a screw 42.

Further, in the above-described embodiment, the lamp which is attached to the corner of the vehicle and whose front opening of the lamp body is opened from the front of the vehicle to the side is described. The same applies to other lamps that are open on the upper side.

[0021]

As is apparent from the above description, according to the vehicular lamp according to the first aspect, a part of the front edge of the inner wall of the seal groove facing the lamp chamber is bent toward the lamp chamber. Then, since the seal leg is easily engaged with the seal groove, the lamp is easily assembled. In addition, since the gap between the seal leg and the seal groove can be reduced, the play between the front lens and the lamp body can be eliminated. According to the second aspect, since the seal length in the seal groove transverse direction is constant in the seal groove length direction, the sealability in the entire engagement portion between the front lens and the lamp body is improved. According to claim 3, a part of the front lens shines strongly due to the light guiding action of the seal leg.
Variations in the light emission of the front lens when the lamp is turned on are eliminated, the entire front lens emits light uniformly, and the visibility is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a cornering lamp according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the lamp (a sectional view taken along line II-II shown in FIG. 1).

FIG. 3 is a horizontal sectional view of the lamp (the line III-I shown in FIG. 1).
Sectional view along II)

FIG. 4 is a horizontal sectional view of the lamp (a sectional view along line IV-IV shown in FIG. 1).

FIG. 5 is a sectional view showing a procedure for assembling the front lens to the lamp body.

FIG. 6 is a horizontal sectional view of a conventional lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Lamp body 12 Bulb which is a light source 13 Seal material 14 (14a, 14b, 14c, 14d) Seal groove 15 Extension part 20 Front lens 22 (22a, 22b, 22c, 22d) Seal leg 50 Vehicle body S Light room

Claims (3)

[Claims] 1. A light source according to claim 1, wherein a seal groove is provided around a front opening of the container-like lamp body which opens from the front to the side, and a seal leg provided around the front lens is engaged with the seal groove. A lamp room is defined, and the engagement direction of the seal legs in the seal grooves opposed to each other across the lamp room is configured to intersect. A vehicle lighting device characterized in that at least a part of a front edge of an inner wall of a seal groove intersecting an engagement direction of the above is bent toward a lamp room. 2. A seal material is filled between the seal groove and the seal leg, and the root of the bent portion is located closer to the seal groove opening than the seal material filling position. The vehicle lighting device as described in the above. 3. The vehicular lamp according to claim 1, wherein the bent portion extends to a position where the direct light from the light source to the seal leg is shielded.