Vehicle lighting

Abstract

To provide a vehicle lighting device that can be made lighter and more rigid. [Solution] The present invention provides a vehicle lamp comprising a container-shaped lamp body having an opening at the front, and a front cover assembled to the opening of the lamp body and defining a lamp chamber inside, wherein the rear wall of the lamp body is formed by a recess that curves toward the front towards the lamp chamber, and a convex portion with a curved cross-section that protrudes toward the rear from at least a portion of the edge of the recess, constituting a part of the rear wall of the lamp body. The convex portion with a curved cross-section distributes stress, thereby improving the rigidity of the rear wall. Furthermore, the beam that constitutes a part of the rear wall improves rigidity without the need for additional reinforcing members.

Description

Technical Field

[0001] The present invention relates to a vehicle lamp including a lamp body and a front cover.

Background Art

[0002] Recently, from the perspective of carbon neutrality, weight reduction of vehicle lamps has been demanded. For weight reduction, simply thinning the wall thickness of the lamp body may reduce the rigidity of the lamp body. Therefore, in Patent Document 1, a beam having an arcuate cross-sectional shape that forms a part of the rear wall of the lamp body is provided in a truss shape on the rear wall of the lamp body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, due to reasons such as the arrangement of peripheral components and the size of the housing unit, the structure of Patent Document 1 may not be applicable. Therefore, there is a need for a vehicle lamp that can further achieve weight reduction and improved rigidity in other aspects.

[0005] The present invention has been made in view of this, and an object thereof is to provide a vehicle lamp capable of achieving weight reduction and improved rigidity.

Means for Solving the Problems

[0006] To solve the above problem, in a first embodiment, the vehicle lamp of the present disclosure comprises a container-shaped lamp body having an opening on its front surface, and a front cover assembled to the opening of the lamp body and defining a lamp chamber on its interior, wherein the rear wall of the lamp body is formed such that a recess curves toward the front lamp chamber and a convex portion with a curved cross-section protrudes toward the rear from at least a portion of the edge of the recess, constituting a part of the rear wall of the lamp body.

[0007] Furthermore, in a second embodiment, in the first embodiment, a plurality of curved linear beams with horizontal cross-sections projecting rearward are formed in the recess, extending vertically inside the recess, and constituting a part of the rear wall of the ramp body, and a curved linear girder with vertical cross-sections projecting rearward is formed in the recess, extending horizontally and connected to the beams at both ends, and constituting a part of the rear wall of the ramp body.

[0008] Furthermore, in a third embodiment, the optical axis adjustment unit, which is provided on the lamp body in the first and second embodiments for adjusting the optical axis of the lamp housed in the lamp chamber, is provided on the beam.

[0009] Furthermore, in a fourth embodiment, the girder is configured such that a pair of optical axis adjustment units are provided at both ends of the girder, as in the first to third embodiments.

[0010] Furthermore, in a fifth embodiment, as in the first to fourth embodiments, a vehicle body mounting portion is formed on the outer surface of the lamp body for attachment to the vehicle body, and the vehicle body mounting portion is configured to be provided on an extension of the beam or girder.

[0011] Furthermore, in a sixth embodiment, in the first to fifth embodiments, a plurality of girders are formed, and the plurality of girders are configured such that both ends are connected to the same beam and they are arranged in a line in the vertical direction. [Effects of the Invention]

[0012] As is clear from the above explanation, it is possible to provide vehicle lighting fixtures that can be made lighter and have improved rigidity. [Brief explanation of the drawing]

[0013] [Figure 1] This is a front view showing a schematic configuration of a vehicle lighting device according to a preferred embodiment. [Figure 2] This is a vertical cross-sectional view taken along line AA in Figure 1. The internal structure of the lamp chamber has been omitted. [Figure 3] This is a horizontal cross-sectional view taken along line BB in Figure 1. The internal structure of the lamp chamber has been omitted. [Figure 4] This is a rear view showing the schematic configuration of the lamp body. [Figure 5] This is an explanatory diagram illustrating the function and effect of the lamp body. Figure 5(A) shows the cross-sectional shape of a conventional lamp body configuration for comparison. Figure 5(B) shows the cross-sectional shape of the lamp body with this configuration. [Figure 6] This is an explanatory diagram illustrating the structure of the lamp body. [Figure 7] This is a modified version of the lamp body. [Modes for carrying out the invention]

[0014] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The embodiments are illustrative and not limiting to the invention, and not all features or combinations thereof described in the embodiments are necessarily essential to the invention. Furthermore, in the following descriptions of embodiments and modifications, the same components will be denoted by the same reference numerals, and redundant descriptions will be omitted as appropriate.

[0015] (Vehicle lighting fixture 1) Figure 1 is a schematic front view of a vehicle lamp 1 according to a preferred embodiment of the present invention. The vehicle lamp 1 is a headlight for a motorcycle and is a combination lamp that houses a plurality of lamp units.

[0016] The vehicle lamp 1 includes a container-shaped lamp body 2 with an opening formed at the front, and a front cover 4 assembled to the front opening of the lamp body 2. The front cover 4 is made of a light-transmitting resin such as polycarbonate or glass, etc. When the front cover 4 is attached to the front opening of the lamp body 2, a lamp chamber S is defined inside.

[0017] Inside the defined lamp chamber S, a pair of daytime running lamp units DRL configured on the left and right, a pair of turn signal lamp units TURN configured on the left and right and arranged below the daytime running lamp units DRL, and a low beam lamp unit Lo and a high beam lamp unit Hi arranged vertically in the center are accommodated.

[0018] For each lamp unit (Hi, Lo, TURN, DRL), a conventionally well-known configuration, such as a reflective type, a projector type, an irradiation type using a light guide, etc., is used, and its type is not limited.

[0019] FIG. 2 is a vertical sectional view of the vehicle lamp 1. FIG. 3 is a horizontal sectional view of the vehicle lamp 1. They are sectional views cut along the A-A line and B-B line of FIG. 1 respectively. The vehicle lamp 1 is attached to the front part of a frame (not shown) of a motorcycle. A control unit of an anti-lock braking system (hereinafter referred to as an ABS device U) is also attached to the front part of the frame and is arranged behind the vehicle lamp 1. FIG. 4 is a rear view showing the schematic configuration of the lamp body 2.

[0020] (Lamp body 2) The lamp body 2 is formed by injection molding using a hard synthetic resin material. A seal groove 2b for engaging with a seal leg 4b provided on the periphery of the front cover 4 is formed on the periphery of the front opening 2a of the lamp body 2. On the outer surface of the peripheral part of the front opening 2a of the lamp body 2, vehicle body attachment parts 5a to 5f for attaching to the vehicle body are protrudingly provided corresponding to the shape of the attachment part on the vehicle body side.

[0021] The lamp body 2 has a rear wall 20 as one of its constituent surfaces, which is the surface facing the front opening 2a. The rear wall 20 is mainly composed of a curved surface (details will be described later) and is connected to the other constituent surfaces of the lamp body, namely the ceiling wall, bottom wall, and left and right side walls, via ridges. Each constituent surface of the lamp body 2 has a gently curved shape, and its edges curve gently to connect it to one another in a continuous manner without bends or steps.

[0022] As shown in Figure 2, in this embodiment, the ceiling wall of the lamp body 2 extends downward and backward from the opening 2a and immediately curves, with minimal protrusion in the front-to-back direction, and is integrally formed with the rear wall 20. Also, as shown in Figure 3, the left and right side walls of the lamp body 2 also curve and extend from the opening 2a of the lamp body 2 towards the center of the lamp chamber S, and parts of the left and right side walls are integrally formed with the rear wall 20. The bottom wall of the lamp body 2 extends forward smoothly and continuously from the rear wall 20 via a ridge, connects to the seal groove 2b, and is integrated with the rear wall 20 (the protrusion 22 described in detail later). In this way, each component surface of the lamp body 2 is smoothly continuous and integrally formed with respect to one another.

[0023] The rear wall 20 integrates with the surrounding walls of the rear wall 20, including the ceiling wall, left and right side walls, and bottom wall, resulting in a lamp body 2 with a small forward protrusion relative to its overall size. In contrast, the front cover 4 has a shape that bulges significantly forward. The vehicle lamp 1 consists of a soup bowl-shaped lamp body 2 with a small protrusion, overlaid by a large, dome-shaped front cover 4. By increasing the volume of the front cover 4, the capacity of the lamp chamber S is increased, securing space to accommodate each lamp unit.

[0024] The vehicle light fixture 1 is configured so as not to interfere with the ABS device U located behind the vehicle light fixture 1. Specifically, a recess 21 is formed in the rear wall 20 of the lamp body 2, which curves inward toward the lamp chamber S at the front. Furthermore, a convex portion 22 is formed on the outer peripheral edge of the recess 21, which is the rear end of the recess 21 that is recessed forward, and extends backward from the outer peripheral edge (see Figures 2 and 3). The convex portion 22 is provided on at least a part of the outer peripheral edge of the recess 21 and is formed along the outer peripheral edge. In this embodiment, it is formed around almost the entire circumference of the recess 21, and the overall outer shape of the recess 21 is formed to be approximately annular in shape to match the outer shape of the approximately circular recess 21.

[0025] The recessed portion 21 and the convex portion 22 constitute part of the rear wall 20 of the lamp body 2. The rear wall 20 itself is curved to form the recessed portion 21 and the convex portion 22. The cross section perpendicular to the direction of extension of the convex portion 22, which extends in the circumferential direction, is a curved line that is convex towards the rear. The recessed portion 21 and the convex portion 22 are continuous at each other's edges and are smoothly connected without bends or steps. Since the recessed portion 21 and the convex portion 22 are mainly composed of curved surfaces and are smoothly continuous without steps, the rear wall 20 is constructed continuously without bends while maintaining a constant thickness. As described above, all of the constituent surfaces of the lamp body 2 are constructed smoothly continuous with the rear wall 20 without bends, and not only the rear wall 20, but the lamp body 2 itself is mainly composed of curved surfaces and is constructed continuously without bends while maintaining a constant thickness.

[0026] Here, the lamp body 2 has many parts that are not shown in the figure, such as bosses and protrusions for attaching optical components of each lamp unit, control units, aiming screws, etc. The protrusions 22 are provided on the periphery of the recesses 21, although they are sometimes interrupted by the part attachment parts. The protrusions 22 are formed on at least a portion of the edge of the recesses 21, and even if they are provided intermittently in several places by the attachment parts, they are formed to border the outer circumference of the recesses 21. Similarly, the attachment parts may also be provided on a part of the recesses 21. For example, in the central part of the lamp body 2 in Figure 3, a breathing hole 25 to which a filter is attached is formed, and bosses B are provided near the left and right edges.

[0027] The protrusions 22 are all configured as curved lines that are convex to the rear, although their respective radii of curvature, widths, and projection amounts differ in the cross-sections perpendicular to their extension direction (see Figures 2 and 3). For example, as shown in Figure 3, the protrusions 22 formed on the left and right edges of the recess 21 have a cross-section that is a curved line that is convex to the rear, with a wide width and a large projection amount. In contrast, as shown in Figure 2, the protrusion 22 formed on the upper edge of the recess 21 has a cross-section that is a curved line that is convex to the rear, with a small width and a small projection amount. Thus, the radius of curvature and width of the protrusions 22 do not have to be constant.

[0028] The lamp body 2 has many parts to which it is attached, and such attachment points may be integrated into recesses 21 and protrusions 22. The cross-section of the protrusion 22 is a curved line that protrudes to the rear, excluding such attachment points. In this embodiment, the protrusion 22 is formed along the outer edge of the recess 21 and is formed in an annular shape overall. The protrusion 22, which is formed to protrude smoothly toward the rear in an annular shape, has a semi-donut shape when viewed from the rear.

[0029] At least some of the multiple protrusions 22, which are separated and continuously formed by component mounting sections, have a portion of their constituent surface that is made up of the same curved surface when adjacent protrusions are separated. Even when at least some of the protrusions 22 are cut out by the component mounting sections, a portion of their constituent surface remains separated from each other on the same curved surface.

[0030] In this embodiment, the recess 21 has a large, roughly circular outer shape, and is provided particularly in the vertical direction to the vicinity of the seal groove 2b, and the protrusion 22 provided around the periphery of the recess 21 is provided with its upper and lower parts connected to the seal groove 2b.

[0031] (Caldera structure) Since the rear wall 20 is formed and a convex portion 22 is formed in an annular shape around the periphery of the recess 21 that is recessed in the front, the outer shape is formed in a caldera shape by the combined action of both, and the cross-sectional shape of the rear wall 20 is configured as a wave-like shape with a series of complex curves.

[0032] The rear wall 20 is integrated with the surrounding walls, which consist of the ceiling wall, bottom wall, and left and right side walls. At the boundary, the two surfaces curve with the same curvature and are smoothly connected. As a result, the lamp body 2 itself is mainly composed of curved surfaces, reducing the formation of corners and maintaining a generally constant thickness.

[0033] The effects of the shape of the lamp body 2 will now be explained. Figure 5(A) is a horizontal cross-sectional view showing a schematic diagram of a conventional lamp body 102 for comparison. Figure 5(B) is a horizontal cross-sectional view of the lamp body 2.

[0034] As shown in Figure 5(A), the conventional ramp body 102 is composed almost entirely of flat surfaces. The rear wall 120 of the ramp body 102 is provided with a rectangular parallelepiped recess 121 to avoid the ABS device U located at the rear. The recess 121 is a rectangular parallelepiped box shape composed only of flat surfaces, with an open rear end, and ribs 110 are formed at the corners. A 90-degree bent corner is formed at the connection point between the recess 121 and the nearly flat main body, and ribs 110 are also provided there. Corners formed by the collision of two flat surfaces are prone to stress concentration. To suppress deformation due to stress concentration and ensure rigidity, ribs 110 are provided at each corner.

[0035] In contrast, as shown in Figure 5(B), in the lamp body 2, the rear wall 20 has a recess 21 formed in the center that curves and recesses in accordance with the shape of the ABS device U, and a convex portion 22 is formed on the periphery of the recess 21. Each of these is formed as a curved surface and constitutes a part of the rear wall 20, and is connected to each other via ridges, creating a smooth and continuous surface.

[0036] Thus, the ramp body 2 is mainly composed of curved surfaces, and these curved surfaces are smoothly continuous with each other, so no bends are formed at the connection points, and no corners are formed due to stress concentration. Since there are no corners, no ribs are formed either. By suppressing the formation of corners where stress concentrates, stress is distributed, resulting in a highly rigid structure that is resistant to deformation. In this embodiment, a ring-shaped protrusion 22 was formed around the entire circumference of the outer edge of the approximately circular recess 21, but it is sufficient if the protrusion 22 is formed on the outer edge of at least a portion of the recess 21 and connected to the end of the recess 21 via a ridge.

[0037] The ramp body 2 is primarily constructed with a corrugated cross-section without bends, due to the recesses 21 and protrusions 22, which suppresses stress concentration at the corners and improves rigidity. This improved rigidity also allows for thinner walls, thus reducing weight. Furthermore, the wall thickness can be kept roughly constant even at connection points with surfaces that tend to be thicker, further contributing to weight reduction. In addition, connection points with reinforcing members such as ribs and corners tend to be thicker and prone to heat buildup, making them areas where molding defects are likely to occur during resin molding. By reducing these areas, molding defects can also be suppressed.

[0038] Here, the configuration in which the recess 21 is recessed toward the front and the convex portion 22 protrudes toward the rear along the outer edge of the recess 21 is the configuration as seen from the rear. In the case of a front view, the rear wall 20 is described as having the portion labeled 21 protruding toward the front and the portion labeled 22 recessed toward the rear along the outer edge of the portion labeled 21. Both configurations represent the same configuration.

[0039] The invention is not limited to this configuration, and may also be configured such that the recess is recessed toward the rear, and the convex portion protrudes toward the front along the outer edge of the recess. Even in the reverse configuration, the aforementioned recess and convex portion form a caldera-like unevenness on the rear wall 20, improving the rigidity of the lamp body.

[0040] As shown in Figure 2, the protrusion 22 is formed to protrude significantly to the rear, with its most protruding portion being behind the seal groove 2b in the front-rear direction. The seal groove 2b is provided around the periphery of the front opening 2a of the lamp body 2, and at least a portion of the protrusion 22 protrudes behind the seal groove 2b. The seal groove 2b has high rigidity as a characteristic due to its role in engaging with other parts. By making the protrusion 22 protrude beyond the seal groove 2b, in contrast to the protrusion 22 that recesses forward, the lamp body 2 forms a well-balanced curved surface in the front-rear direction, thereby reducing the load and moment on the lamp body 2. In this embodiment, a recess 21 is mainly formed in front of the seal groove 2b in the front-rear direction centered on the seal groove 2b, and a protrusion 22 is formed behind the seal groove 2b to balance the concave and convex directions, thereby efficiently utilizing the rigidity of the seal groove 2b.

[0041] Furthermore, the rigidity of the lamp body 2 is improved by reducing the amount of protrusion in the front-rear direction of the lamp body 2 and providing a seal groove 2b that borders the outer circumference of the rear wall 20 where the most stress is applied.

[0042] (beam structure) Furthermore, as shown in Figure 4, in the ramp body 2 of this embodiment, a first beam 61 and a second beam 62, which constitute a part of the rear wall 20, are formed extending from the upper end to the lower end of the recess 21. The first beam 61 and the second beam 62 continue to extend vertically and connect to the protrusion 22.

[0043] As shown in Figure 4, the first beam 61 extends vertically within the recess 21, slightly to the left of the center (towards the right in Figure 4, as Figure 4 is a rear view), and is connected at its upper and lower ends to the protrusions 22 provided on the outer circumference of the recess 21. The second beam 62 extends vertically within the recess 21, slightly to the right of the center (similarly, to the left in Figure 4), and is connected at its upper and lower ends to the protrusions 22 provided on the outer circumference of the recess 21.

[0044] In the annularly formed protrusion 22, the protrusions 22 at the upper and lower edges of the annulus are smaller in both protrusion and width than the protrusions 22 at the right and left edges (see Figures 2 and 3), and the vertically extending first beam 61 and second beam 62 extend roughly from the upper end to the lower end of the rear wall 20.

[0045] Both the first beam 61 and the second beam 62 constitute part of the rear wall 20, and their cross-sections perpendicular to the extension direction, i.e., the horizontal cross-sections, are curved lines that are convex toward the rear. Furthermore, each beam is smoothly connected to the other parts of the rear wall via ridges, and the corresponding cross-sectional shape of the ramp body 2 is constructed continuously without bends while maintaining a constant wall thickness.

[0046] The first beam 61 and the second beam 62, which extend long in the vertical direction, give the lamp body 2, including the rear wall 20, a structure that is resistant to deformation under load. Since the first beam 61 and the second beam 62 themselves are curved surfaces that distribute stress, the rear wall 20 has a more rigid structure that is more resistant to deformation. The rigidity of the lamp body 2 is improved by the two beams, and this improved rigidity allows for thinner walls and thus weight reduction. This results in thinner walls and improved rigidity of the vehicle lighting fixture 1.

[0047] As shown in Figure 3, the recess 21 and the protrusion 22, and the first beam 61 and second beam 62 formed on the protrusion 22, are connected via ridges. While maintaining the cross-sectional shape of each as a curved line that is convex backward / convex forward, adjacent sections are connected smoothly and continuously by curving with the same curvature without forming steps or corners.

[0048] As mentioned above, the rear wall 20 is also connected to the vertical walls, which are the ceiling wall, bottom wall, and side wall, via the thymus, and at the boundary, both are curved with the same curvature and are smoothly and continuously connected. For this reason, the cross-sectional shape of the ramp body 2 is composed of a wave-like structure with a series of complex curves. As a result, the ramp body 2 itself is mainly composed of curved surfaces, the formation of corners is reduced, and the wall thickness is kept generally constant. The rigidity of the ramp body 2 is improved, and the thickness of the ramp body 2 can be reduced.

[0049] (digit structure) As shown in Figure 4, a first girder 71 extending in the left-right direction is formed approximately in the center of the rear wall 20, connected to the first beam 61 and second beam 62 extending in the vertical direction. The first girder 71 also constitutes part of the rear wall 20 of the ramp body 2, and its cross section perpendicular to the extension direction (vertical cross section) is configured as a curved line. In this embodiment, the vertical cross section of the first girder 71 is a curved line that is convex toward the rear. However, it is not limited to this, and the direction in which the girder protrudes does not matter as to whether it is forward or backward. Similarly, the direction in which the beam protrudes does not matter as to whether it is forward or backward.

[0050] As shown in Figure 3, the first girder 71, which forms part of the rear wall 20 and extends horizontally, is provided, so that the cross-section of the rear wall 20 also becomes a wave-like shape with repeated undulations in the vertical direction. Since the first girder 71 itself is a curved surface that distributes stress, the rear wall 20 has a more rigid structure that is more resistant to deformation. This improves the rigidity of the ramp body 2, and the improved rigidity allows for thinner walls and thus weight reduction. Since part of the rear wall 20 becomes a beam / girder, the rigidity of the ramp body 2 can be improved without adding reinforcing members.

[0051] In addition, since a first girder 71 is provided approximately in the center of the first beam 61 and second beam 62, which extend in the vertical direction, and which extends horizontally and connects to both beams at both ends, the first beam 61, the second beam, and the first girder 71 form an H shape. The H-shaped structure is strong against both vertical and horizontal loads. The rigidity of the ramp body 2 is further increased by providing the first beam 61, the second beam 62, and the first girder 71 in an H shape on the rear wall 20.

[0052] (Effects of Lamp Body 2) The overall effect of the ramp body 2 will now be explained. As shown in Figure 6, the ramp body 2 has a roughly annular protrusion 22 formed on the rear wall 20, part of which is in contact with the seal groove 2b, and inside this, a first beam 61 and a second beam 62 extending in the vertical direction, and a first girder 71 extending in the horizontal direction are formed in an H shape (all shown in light gray in Figure 6). The formation of the circular and H-shaped structures, which have high load-bearing capacity, on the rear wall 20 improves the load-bearing capacity of the rear wall 20.

[0053] Furthermore, the protrusion 22, the first beam 61, the second beam 62, and the first girder 71 all have a cross-sectional shape perpendicular to the extension direction, which is a curved line that is convex towards the rear, and they constitute a part of the rear wall 20. At the boundary ends, they all curve with the same curvature and are smoothly and continuously connected, and have a generally constant thickness without forming a bent section. The ramp body 2 is mainly composed of curved surfaces, and its cross-sectional shape is composed of a wave-like structure with a series of complex curves, which reduces the formation of corners and improves rigidity.

[0054] By configuring the lamp body 2 in this way, the rigidity of the lamp body 2 is improved, and the thickness of the lamp body 2 can be reduced. This makes it possible to reduce the thickness of the vehicle lighting fixture 1 and improve its rigidity.

[0055] (Optical axis adjustment section, vehicle mounting section) Furthermore, as shown in Figure 6, the lamp body 2 is provided with optical axis adjustment sections E1 to E3 for fine-tuning the optical axes of the high-beam lamp unit Hi and the low-beam lamp unit Lo. The optical axis adjustment sections E1 to E3 are aiming mounting sections to which a pivot or an aiming member (not shown) is attached. By rotating the aiming member, the support member (not shown) of the lamp unit tilts, and the optical axes of both lamp units are finely adjusted in the horizontal and vertical directions.

[0056] These optical axis adjustment sections E1 to E3 are provided on the first beam 61, the second beam 62, and the first girder 71. Optical axis adjustment sections E1 and E2 are provided on the first beam 61. Optical axis adjustment section E3 is provided on the first beam 61. Since optical axis adjustment sections E2 and E3 are provided at the joint with the first girder 71, optical axis adjustment sections E2 and E3 are formed at both ends of the first girder 71.

[0057] The optical axis adjustment sections E1 to E3 are thick and highly rigid because they support the support member to which the two lamp units are attached. By making the optical axis adjustment sections E1 to E3, which are structurally necessary components of the lamp body 2, part of a beam or girder, the rigidity of the lamp body 2 was improved.

[0058] In particular, in this embodiment, optical axis adjustment sections E2 and E3 are formed at both ends of the first girder 71, which is the joint between the beam and the girder. This improves the rigidity of both the beam and the girder, and consequently the rigidity of the rear wall 20 and the lamp body 2.

[0059] Thus, the component mounting section is thick and highly rigid due to its configuration for attaching other components. Taking advantage of this, it is preferable to configure the component mounting section not only to the optical axis mounting section, but also to be positioned on a beam / girder or an extension thereof.

[0060] For example, as shown in Figure 6, the vehicle body mounting portions 5a to 5f, to which the lamp body 2 is attached to the vehicle body, are thick and highly rigid because they are the locations where the vehicle lighting fixture 1 is attached. Here, the vehicle body mounting portion 5a, provided on the upper edge of the outer surface of the lamp body 2, is wide and has a pair of mounting holes 6a and 6b on the left and right. The left mounting hole 6a is formed approximately on the extension of the first beam 61 which extends in the vertical direction. Similarly, the right mounting hole 6b is formed approximately on the extension of the second beam 62 which extends in the upward direction.

[0061] As mentioned above, the vehicle body mounting section 5a has high rigidity, and mounting holes 6a and 6b are provided on the extensions of the first beam 61 and the second beam 62. This allows the high rigidity of the vehicle body mounting section 5a to be used to improve the rigidity of the first beam 61 and the second beam 62, thereby improving the rigidity of the lamp body 2 as well.

[0062] Similarly, the body mounting portions 5b and 5f are formed on the extension of the first girder 71, which extends in the left-right direction. The presence of the highly rigid body mounting portions 5b and 5f on the extension of the first girder 71 improves the rigidity of the first girder 71 and, consequently, the lamp body 2.

[0063] (modified version) In this embodiment, only two beams and one girder are provided, but this is not limited to this configuration; three or more beams and two or more girders may be provided. Figure 7 shows a modified example: ramp body 2A.

[0064] The ramp body 2A has a recess 21 and a protrusion 22 formed in its rear wall 20A, and in addition to the first beam 61 and second beam 62 that extend vertically, a third beam 63 is also formed. Furthermore, the first girder 71 and second girder 72 that extend horizontally are connected to all of the first beam 61, second beam 62, and third beam 63. The second girder 72 is formed parallel to the first girder 71 and below the first girder 71. Multiple girders may be provided in this manner. However, it is not limited to this configuration, and the first girder 71 may be connected to the first beam 61 and the second beam 62, and the second girder 72 may be connected to the second beam 62 and the third beam 63 in an alternating vertical direction. Alternatively, both the first girder 71 and the second girder 72 may be connected to the first beam 61 and the second beam 62. In the horizontal cross-sections of the first digit 71 and the second digit 72, if they are configured in a curved line shape, the convex direction of each cross-sectional curve may protrude in the same direction, either forward or backward, or in different directions.

[0065] Although preferred embodiments of the present invention have been described above, these embodiments are merely examples of the present invention, and it is possible to combine them based on the knowledge of those skilled in the art, and such forms are also included within the scope of the present invention. [Explanation of symbols]

[0066] 1: Vehicle lighting fixtures 2: Lamp body 2a: opening 4: Front cover 5a~5f: Mounting parts for the vehicle body 20: Rear wall 21: Recess 22: Convex part 61~63: Beam 71, 72: digits E1~E3: Optical axis adjustment section S:Light room

Claims

1. A container-shaped lamp body having an opening on the front, and a front cover assembled to the opening of the lamp body and defining a lamp chamber on the inside, Equipped with, The rear wall of the lamp body is formed with a recess that curves toward the front, toward the lamp chamber, and a convex portion with a curved cross-section, from which at least a portion of the edge of the recess protrudes toward the rear, constituting a part of the rear wall of the lamp body. A vehicle lighting device characterized by the following features.

2. In the recess, a plurality of curved linear beams, extending vertically inside the recess and projecting rearward in their horizontal cross-section, are formed as part of the rear wall of the lamp body. In the recess, a curved linear girder, extending in the left-right direction and connected to the beam at both ends, with a vertical cross-section projecting backward, is formed as part of the rear wall of the ramp body. The vehicle lighting device according to feature 1.

3. An optical axis adjustment unit, provided in the lamp body, which adjusts the optical axis of the lamp housed in the lamp chamber, is provided in the beam. The vehicle lighting device according to feature 2.

4. A pair of optical axis adjustment units are provided at both ends of the girder. The vehicle lighting device according to feature 3.

5. The outer surface of the lamp body has a vehicle body mounting portion formed therein for attachment to the vehicle body. The vehicle body mounting portion is provided on an extension of the beam or girder. A vehicle light fixture according to any one of claims 2 to 4.

6. Multiple girders are formed, and these multiple girders are arranged in a vertical direction, with both ends connected to the same beam. The vehicle lighting device according to feature 2.

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