Vehicular lamp

Abstract

To provide a vehicular lamp provided, in a lamp body, with a bracket that is thin, lightweight, and has sufficient strength.SOLUTION: A vehicular lamp 1 has a bracket 5 having a mounting section 7 and a main body section 6, and a lamp body 2 that is integrated with the main body section 6 and is attached to a vehicle body via the mounting section 7. The lamp body 2 has a wave-shaped curved section 3 in which convex curved surfaces 3a1 and 3b1 are continuous on both sides of a concave curved surface 3c1, the bracket having a plurality of main body sections 6a and 6b, and the plurality of main body sections 6a and 6b of the bracket 5 are each integrally formed with a plurality of convex curved surfaces 3a1 and 3b1 of the wave-shaped curved section 3 of the lamp body 2.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] A technology related to a vehicle lamp having a bracket with a thin wall and lightweight and sufficient strength on a lamp body.

Background Art

[0002] In recent years, with the demand for weight reduction of vehicle lamps from the perspective of carbon neutrality, weight reduction of various parts of the lamp body on which components are mounted has been required. On the other hand, in recent vehicle lamps, the number of components mounted on the lamp body, such as sensors installed from the perspective of improving safety, has been increasing. In particular, strengthening the rigidity of the bracket, which is the mounting part to the vehicle body, has been required.

[0003] Figures 4 and 5 of Patent Document 1 disclose a lamp body having a vehicle body mounting part (bracket) with enhanced rigidity by adding ribs.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Adding ribs to each vehicle body mounting part (bracket) increases the rigidity of the bracket, but on the other hand, it increases the self-weight of the lamp body, both of which are contrary to the requirement for weight reduction of vehicle lamps. On the other hand, when no ribs are provided on the bracket, the base end part of the bracket and the connecting part on the lamp body side that connects and integrates the base end parts are likely to be thickened together to maintain rigidity, and in that case too, it is contrary to the requirement for weight reduction of vehicle lamps. Therefore, there is a need for a bracket that has the same rigidity as when ribs are provided while preventing thickening of both the base end part of the bracket and the connecting part on the lamp body side.

[0006] In view of the above problems, the present application provides a vehicle lamp that realizes weight reduction and rigidity improvement by providing a bracket with sufficient strength even if it is thin and lightweight on a lamp body.

Means for Solving the Problems

[0007] In a vehicle lamp having a bracket with a mounting portion and a main body portion, and a lamp body integrated with the main body portion and attached to a vehicle body via the mounting portion, the lamp body has a corrugated curved portion in a shape where convex curved surfaces are continuous on both sides of a concave curved surface, and a plurality of main body portions of the bracket are provided, and the plurality of main body portions are respectively integrally formed on a plurality of convex curved surfaces of the corrugated curved portion of the lamp body.

[0008] (Function) By the base ends of the plurality of main body portions of the bracket being respectively continuous with a plurality of convex curved surfaces on the lamp body side, stress concentration at the continuous portion between the base end of the bracket main body portion and the convex curved surface on the lamp body side is alleviated, and further, by the plurality of convex curved surfaces being continuous via the concave curved surface, stress concentration on each convex curved surface is further alleviated via the concave curved surface.

[0009] Also, in the vehicle lamp, it is more desirable that the main body portion of the bracket is integrally formed at the top of the convex curved surface of the lamp body.

[0010] (Function) The base ends of the plurality of main body portions of the bracket are respectively continuous with the tops of a plurality of convex curved surfaces on the lamp body side, and stress concentration at the continuous portion between the base end of the bracket main body portion and the convex curved surface on the lamp body side is evenly dispersed on both sides of the top and further alleviated.

[0011] Also, in the vehicle lamp, it is more desirable that the plurality of main body portions are respectively integrally formed along the ridge lines of the plurality of convex curved surfaces.

[0012] (Function) By forming the base ends of the plurality of main body parts of the bracket wide along the ridge lines of the plurality of convex surfaces on the lamp body side, the stress concentration at the continuous part between the bracket side base end and the convex surface on the lamp body side is dispersed along the ridge lines and further relaxed.

[0013] Also, in the vehicle lamp, it is more desirable that the ridge lines of the plurality of convex surfaces of the lamp body are each formed so as to extend in the depth direction of the lamp body.

[0014] (Function) The stress concentration at the continuous part between the bracket side base end and the convex surface on the lamp body side is dispersed in the depth direction of the lamp body where the ridge lines are formed and further relaxed.

[0015] Also, in the vehicle lamp, it is more desirable that the bracket protrudes laterally from the side of the lamp body.

[0016] (Function) In the bracket that receives a downward force by protruding laterally, the stress concentration due to the bending moment generated at the continuous part between the bracket side base end and the convex surface on the lamp body side is relaxed.

Advantages of the Invention

[0017] According to the vehicle lamp, in addition to relaxing the stress concentration at the continuous part between the bracket side base end and the convex surface on the lamp body side, the stress concentration generated on each convex surface is further relaxed by the continuous concave surface, so that a bracket having higher rigidity can be obtained.

[0018] According to the vehicle lamp, the stress concentration at the continuous part between the bracket side base end and the convex surface on the lamp body side is further relaxed by dispersion, so that a bracket having even higher rigidity can be obtained.

[0019] According to the vehicle lamp, even if a bending moment acts on the continuous part between the bracket-side base end and the lamp body-side convex surface, the convex surface of the continuous part and the concave surfaces between the plurality of convex surfaces are relaxed, so that a bracket having high rigidity against the bending moment can be obtained.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0021] Hereinafter, a preferred embodiment of the vehicle lamp of the present invention will be described with reference to FIGS. 1 to 5. In each figure, the directions of the vehicle lamp will be described as (front: rear: left: right: up: down).

[0022] FIG. 1 shows a front view of a vehicle lamp 1 according to a preferred embodiment of the present invention. The vehicle lamp 1 in FIG. 1 is a left vehicle lamp (a right vehicle lamp is not shown) including a lamp body 2 and a front lens 4. The lamp body 2 is formed of resin or the like and has a container shape including a rear wall extending vertically and a bottom wall extending front and rear in a vertical cross-section along the front-rear direction, and has an opening at its front end. A groove-shaped seal portion 2a is provided around the entire circumference of the front end opening of the lamp body 2. The front lens 4 is formed of a light-transmissive resin, glass, or the like, is fixed to the groove-shaped seal portion 2a, and defines a lamp chamber S sealed inside the lamp body 2 via the seal portion 2a.

[0023] In the defined lamp chamber S shown in FIG. 1, a high-beam lamp unit Hi and a low-beam lamp unit Lo that irradiate the high-beam light forward (toward the front of the paper) are accommodated. The high-beam lamp unit Hi and the low-beam lamp unit Lo are optical units configured to irradiate the emitted light from the light source forward of the vehicle to form a high-beam light distribution / low-beam light distribution. Each lamp unit (Hi, Lo) uses a conventionally well-known configuration, for example, a lamp unit such as a reflector type or a projector type, and its type is not limited.

[0024] As shown in FIG. 1, a plurality of first brackets 5 shown in FIGS. 2 to 5 are integrally formed outside the lamp body 2 behind the seal portion 2a. In FIG. 1, the detailed form of the bracket 5 is omitted, and the detailed form of the bracket 5 will be described with reference to FIGS. 2 to 5. FIGS. 2 to 5 are enlarged views of the area A (the portion surrounded by the broken line) of the lamp body 2 shown in FIG. 1. FIG. 2 is an enlarged perspective view of the bracket 5 protruding laterally (rightward in this embodiment) outside the lamp body 2 as viewed from the right rear obliquely, FIG. 3 is an enlarged front view showing the periphery of the bracket 5 of the lamp body 2, FIG. 4 is an enlarged rear view showing the periphery of the bracket 5 of the lamp body 2, and FIG. 5(a) is an end view cut vertically at the position of line I-I of the lamp.

[0025] As shown in FIGS. 2 and 5(a), a first bracket 5 and a second bracket 8 project from the outside of the lamp body 2. As shown in each of FIGS. 2 to 5, the first bracket 5 is provided on the corrugated curved portion 3 of the lamp body 2. In particular, as shown in FIG. 5(b), the corrugated curved portion 3 projects to the outside (surface side) of the lamp body, and has convex portions 3a and 3b each having convex curved surfaces 3a1 and 3b1 on the surface, and a concave portion 3c having a concave curved surface 3c1 on the surface. The convex portions 3a and 3b are integrally formed on both sides of the concave portion 3c, and the convex curved surfaces 3a1 and 3b1 are smoothly continuous on both sides of the concave curved surface 3c1, respectively, to form a corrugated curved surface on the surface of the corrugated curved portion 3. Incidentally, reference numerals 3a2 and 3b2 shown in FIGS. 3 and 5(b) indicate the back surfaces (concave curved surfaces) of the convex portions 3a and 3b that project toward the outside of the lamp body 2, and reference numeral 3c2 indicates the back surface (convex curved surface) of the concave portion 3c that is recessed inside the lamp body 2.

[0026] Also, as shown in each of FIGS. 2 to 5(a)(b), the first bracket 5 in the area of symbol A is composed of a main body portion 6a and 6b which are a plurality of legs, and a mounting portion 7 fixed to a vehicle body (not shown). One end of the main body portion 6a is integrally formed in a state of being connected to the convex curved surface 3a1 of the corrugated curved portion 3 of the lamp body 2, and one end of the main body portion 6b is integrally formed in a state of being connected to the convex curved surface 3b1, and both extend laterally (rightward in this embodiment) of the lamp body 2. Further, the mounting portion 7 has a top surface portion 7a, a left side wall portion 7b, a right side wall portion 7c, a bottom portion 7d, and a front wall portion 7e, and is formed in a box shape with an opening at the front. The top surface portion 7a is formed so as to open forward, and is provided with a mounting hole 7f for mounting to a vehicle body (not shown). The mounting portion 7 is formed to extend laterally (rightward) of the lamp body 2 by integrally forming the left side wall portion 7b at the other ends of the main body portions 6a and 6b. Further, the lamp body 2 is also formed with a second bracket 8 that projects rearward and has mounting holes 8a and 8b for a vehicle body (not shown). The lamp body 2 is engaged and fixed to a vehicle body (not shown) by the bracket 5 projecting laterally and the bracket 8.

[0027] In the area of symbol A in FIG. 1, one ends (base ends) of a plurality of main body parts 6a, 6b of a bracket 5 protruding laterally (rightward) of a lamp body 2 shown in FIGS. 2 to 5 are respectively continuous with convex curved surfaces 3a1, 3b1 of a plurality of convex parts 3a, 3b of the lamp body 2, whereby stress concentration at the continuous part between the bracket 5 and the convex curved surfaces 3a1, 3b1 of the lamp body 2 is alleviated. Further, the plurality of convex curved surfaces 3a1, 3b1 are respectively continuously formed at both ends of a concave curved surface 3c1, whereby stress concentration of the convex curved surfaces 3a1, 3b1 is further alleviated via the concave curved surface 3c1. According to the vehicle lamp 1 of the present embodiment, in addition to alleviating stress concentration at the continuous part between the bracket 5 and the lamp body 2, stress concentration generated on each of the convex curved surfaces 3a1, 3b1 is further alleviated by the concave curved surface 3c1, so that it is possible to obtain a bracket 5 having higher rigidity without providing ribs while achieving weight reduction.

[0028] Further, as shown in FIG. 5(b), it is more desirable that one ends (base ends) of the main body parts 6a, 6b of the bracket 5 are integrally formed with the tops 3a3, 3b3 of the convex curved surfaces 3a1, 3b1 in the corrugated curved part 3 of the lamp body 2, respectively. In that case, stress concentration at the continuous part between the base ends of the main body parts 6a, 6b of the bracket 5 and the convex curved surface of the lamp body 2 is further alleviated by being evenly dispersed on both sides of the tops 3a3, 3b3 in the convex parts 3a, 3b, so that it is possible to obtain a bracket 5 having higher rigidity.

[0029] In addition, if there are a plurality of main body parts of the bracket 5 in the present embodiment, three or more may be formed. In that case, the corrugated curved part on the lamp body 2 side has a shape in which concave curved surfaces and convex curved surfaces are continuously arranged alternately and is formed to have three or more convex curved surfaces, and it is desirable that the three or more main body parts provided on the bracket 5 are continuously and integrally formed with one of the three or more provided convex curved surfaces respectively, and it is more desirable that they are integrally formed with the tops of the respective convex curved surfaces.

[0030] Further, as shown in FIGS. 2 and 4, when the straight lines L1 and L2 indicate the straight lines along which the main body portions 6a and 6b of the bracket 5 in the vehicle lamp 1 of the present embodiment extend along the ridge lines of the convex curved surfaces 3a1 and 3b1 of the convex portions 3a and 3b, respectively, it is desirable that the convex curved surfaces 3a1 and 3b1 are integrally formed so as to have a longitudinal shape along the straight lines L1 and L2. By integrally forming a plurality of one ends (base end portions) of the main body portions 6a and 6b of the bracket 5 wide along the ridge lines of the plurality of convex curved surfaces 3a1 and 3b1 of the lamp body 2, the stress concentration generated at the continuous portion between the base end portion of the bracket 5 (the base end portions of the main body portions 6q and 6b) and the convex curved surfaces 3a1 and 3b1 of the convex portions 3a and 3b of the corrugated curved portion 3 of the lamp body 2 is dispersed along the ridge line, further relaxed, and a bracket 5 with higher rigidity can be obtained for the lamp body 2.

[0031] Further, it is more desirable that the ridge lines of the plurality of convex curved surfaces 3a1 and 3b1 of the lamp body 2 extend in the depth direction of the lamp body, that is, in the front-rear direction (the direction in which the straight lines L1 and L2 in FIG. 2 extend) in the vehicle lamp 1 of the present embodiment. In that case, the stress concentration generated at the continuous portion between the base end portion of the bracket 5 and the convex curved surfaces 3a1 and 3b1 of the lamp body 2 is evenly dispersed and further relaxed in the depth direction (front-rear direction) orthogonal to the width direction (left-right direction) of the lamp body 2, so that a bracket 5 with higher rigidity can be obtained for the lamp body 2.

[0032] In addition, although the bracket 5 in the vehicle lamp 1 in the present embodiment protrudes laterally (right direction) from the lamp body 2, the meaning of "protruding laterally" in the present embodiment means protruding laterally outside the lamp body 2. Therefore, the bracket 5 is not limited to the right direction of the lamp body 2, and may protrude in the left direction, the front direction, the rear direction, or an oblique direction maintaining the lateral orientation. By protruding laterally, even if a bending moment is generated at the continuous portion between the base end portion of the bracket 5 (the base end portions of the main body portions 6a and 6b) and the convex curved surfaces 3a1 and 3b1 of the lamp body 2 in the bracket 5 that receives a downward force, the stress concentration generated at the continuous portion is relaxed, and high rigidity against the bending moment is realized at the base end portion of the bracket 5.

Description of Symbols

[0033] 1 Vehicle lamp 2 Lamp body 3 Wave-shaped curved portion 3a1, 3b1 Convex surfaces 3c1 Concave surface 5 First bracket 6a, 6b Body portions 7 Mounting portion 7a Top surface portion 7b Left side wall portion 7c Right side wall portion 7d Bottom portion 7e Front wall portion 7f Mounting hole L1, L2 Lines extending in the depth direction of the lamp body

Claims

1. In a vehicle lamp having a bracket with a mounting portion and a main body portion, and a lamp body integrated with the main body portion and attached to a vehicle body via the mounting portion, the lamp body has a corrugated curved portion in a shape where convex curved surfaces are continuous on both sides of a concave curved surface, a plurality of the main body portions of the bracket are provided, and the plurality of the main body portions are integrally formed on a plurality of convex curved surfaces of the corrugated curved portion of the lamp body, respectively. A vehicle lamp characterized by this.

2. The vehicle lamp according to claim 1, characterized in that the main body portion of the bracket is integrally formed at the top of the convex curved surface of the lamp body.

3. The vehicle lamp according to claim 1 or 2, characterized in that the plurality of the main body portions are integrally formed along the ridge lines of the plurality of the convex curved surfaces, respectively.

4. The vehicle lamp according to claim 3, characterized in that the ridge lines of the plurality of the convex curved surfaces of the lamp body are formed so as to extend in the depth direction of the lamp body, respectively.

5. The vehicle lamp according to claim 1 or 2, characterized in that the bracket projects laterally from the lamp body.

Images