Vehicle lamp

Abstract

Provided is a vehicle lamp (1) comprising: a container-shaped lamp body (2) having an opening (2a) in the front surface thereof; and a front surface cover (4) that is assembled to the opening (2a) of the lamp body (2) and defines a lamp chamber on the inside thereof. In a rear surface wall (20) of the lamp body (2), a recessed part (21) which is curved and recessed toward the lamp chamber (S) that is in front, and a protruding part (22) which has a curvilinear cross section and in which at least a part of the edge of the recessed part (21) protrudes rearward are formed so as to constitute a part of the rear surface wall (20) of the lamp body (2). Since the protruding portion (22) having a curvilinear cross section disperses stress, the rigidity of the rear surface wall is improved. A beam constituting a portion of the rear surface wall also improves rigidity without requiring an additional reinforcing member.

Description

Vehicle lamp

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

[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, by providing a beam with an arcuate cross-sectional shape, which forms a part of the rear wall of the lamp body, in a truss shape on the rear wall of the lamp body, it is possible to thin the lamp body while ensuring rigidity.

[0003] Also, around the mounting portion for fixedly supporting the components mounted on the lamp body, further ensuring of rigidity according to the weight of the components is required. As an example, in Patent Document 2, in a thin-walled lamp body, by forming semi-cylindrical portions with a semi-cylindrical cross-sectional shape on both sides of the component support portion to which the aiming member is attached, it is proposed to reduce the bending stress caused by the mass of the fixedly supported component and suppress the decrease in the rigidity of the lamp body.

[0004] Japanese Patent Application Laid-Open No. 2023 - 111582, Japanese Patent Application Laid-Open No. 2024 - 114096

[0005] However, due to reasons such as the arrangement of surrounding components and the size of the accommodation 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 improvement in rigidity in other aspects.

[0006] Further, the components attached to the lamp body are various, and depending on the shape of the lamp body and the position of the component support portion, it is not always possible to provide semi-cylindrical portions with a semi-cylindrical cross-sectional shape on both sides of the component support portion as in Patent Document 2. In such a case, in order to ensure rigidity, it is necessary to provide reinforcing ribs, which has a problem of being contrary to the weight reduction of the lamp body.

[0007] 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 improvement in rigidity.

[0008] Furthermore, the present invention aims to provide a vehicle lighting fixture having a lamp body that can achieve sufficient strength around the part support area even if it is thin-walled and lightweight.

[0009] Furthermore, the present invention aims to provide a vehicle lighting fixture with a cord clamp that can achieve weight reduction and improved rigidity even in lamp bodies where the configuration described in Patent Document 1 cannot be reused.

[0010] To achieve one of the above objectives, the vehicle lamp of the present disclosure comprises a container-shaped lamp body having an opening on its front, 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 with a recess that curves toward the front 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.

[0011] Furthermore, in order to achieve one of the above objectives, the vehicle lamp of the present disclosure comprises a container-shaped lamp body having an opening on its front surface, and a front cover attached to the opening and forming a lamp chamber inside, wherein a component mounting portion is formed on the rear wall of the lamp body to which a component to be mounted in the lamp chamber is attached, the component mounting portion has a U-shaped slide support portion with three walls extending toward the lamp chamber, and opposing inner flanges are formed in the U-shaped opening, the slide support portion supports a part of the component in a slide space defined by the three walls and the inner flanges, at least a part of the slide support portion is continuous with the rear wall and constitutes a part of the rear wall, and the slide support portion is formed as a smooth curved surface overall.

[0012] In the above embodiment, the three walls do not necessarily refer to three orthogonal walls, but rather to walls that surround the supported member on three sides. Also, the term "U-shape" refers to a shape in which one of the four sides is open.

[0013] Furthermore, in order to achieve one of the above objectives, the vehicle lamp of this disclosure comprises a container-shaped lamp body with an open front, and a front cover assembled to the front opening of the lamp body and defining a lamp chamber inside, wherein the rear wall of the lamp body has a vertical wall portion formed in a curved shape that protrudes either forward or backward, with a part of it cut out, and the vertical wall portion constitutes a part of the lamp body.

[0014] According to this disclosure, it is possible to provide a vehicle lighting device that can be made lighter and have improved rigidity.

[0015] Furthermore, according to this disclosure, it is possible to provide a vehicle lighting fixture having a lamp body that achieves sufficient strength around the part support area, even if it is thin-walled and lightweight.

[0016] Furthermore, this disclosure provides a vehicle lighting fixture with a cord clamp that can be made lighter and more rigid.

[0017] This is a front view showing the schematic configuration of the vehicle lighting fixture according to the first and second embodiments. This is a vertical cross-sectional view taken along the line A-A in Figure 1. This is a horizontal cross-sectional view taken along the line B-B in Figure 1. This is a rear view showing the schematic configuration of the lamp body shown in Figure 1. This shows the cross-sectional shape of a conventional lamp body for comparison. This shows the cross-sectional shape of the lamp body of this configuration. This is an explanatory diagram illustrating the structure of the lamp body shown in Figure 1. This shows a modified example of the lamp body. This is a rear view showing the schematic configuration of the lamp body constituting the vehicle lighting fixture according to the second embodiment. This is an explanatory diagram illustrating the structure of the lamp body according to the second embodiment. This is a front view showing the schematic configuration of the lamp body with the lighting unit according to the second embodiment assembled. This is an enlarged front view of the first aiming mounting part, indicated by reference numeral E1 in Figure 10, which constitutes the lamp body. This is an enlarged perspective view of the first aiming mounting part. This is a front-to-rear vertical cross-sectional view (end view) of the first aiming mounting part taken along the line C-C in Figure 11. This is a front-to-rear vertical cross-sectional view (end view) of the first aiming mounting part taken along the line D-D in Figure 11. This is a vertical cross-sectional view (end view) of the first aiming mounting section in the left-right direction, cut along the line E-E in Figure 13. This is a front view showing the schematic configuration of the vehicle lighting fixture according to the third embodiment. This is a vertical end view cut along the line A-A in Figure 16. This is a horizontal end view cut along the line B-B in Figure 16. This is a rear view showing the schematic configuration of the lamp body according to the third embodiment. This is an enlarged perspective view of the vertical wall section (beam) provided in area C of Figure 19, viewed from the front. This is a plan view of the vertical wall section (beam) of Figure 20, viewed from above.

[0018] Specific embodiments of the present invention will be described below 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. In the following descriptions of embodiments and modifications, the same components are denoted by the same reference numerals, and redundant explanations are omitted as appropriate. The labels Up, Lo, Fr, Re, Ri, and Le shown in the figures indicate the up, down, front, rear, right, and left directions of the vehicle light, respectively.

[0019] [First Embodiment] (Vehicle Lighting Device 1) Figure 1 is a schematic front view of a vehicle lighting device 1 according to the first embodiment of the present invention. The vehicle lighting device 1 is a headlight for a motorcycle and is a combination lamp that houses a plurality of lamp units.

[0020] The vehicle lamp 1 comprises a container-shaped lamp body 2 with an opening 2a (see Figure 2, described later) formed at the front, and a front cover 4 that is 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, and when the front cover 4 is attached to the front opening 2a (see Figure 2) of the lamp body 2, a lamp chamber S is defined on the inside.

[0021] The defined lamp chamber S houses a pair of daytime running lamp units (DRL) arranged on the left and right sides, a pair of turn signal lamp units (TURN) arranged on the left and right sides and positioned 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.

[0022] Each lamp unit (Hi, Lo, TURN, DRL) can use conventionally known configurations, such as reflective type, projector type, or illumination type using a light guide, and the type is not limited.

[0023] Figure 2 is a vertical cross-sectional view of the vehicle lamp 1 cut along line A-A in Figure 1. Figure 3 is a horizontal cross-sectional view of the vehicle lamp 1 cut along line B-B in Figure 1. The internal structure of the lamp chamber is omitted in Figures 2 and 3. The vehicle lamp 1 is mounted on the front of the frame (not shown) of a motorcycle. The control unit of the anti-brake lock system (hereinafter referred to as ABS device U) is also mounted on the front of the frame and is located behind the vehicle lamp 1. Figure 4 is a rear view showing the schematic configuration of the lamp body 2.

[0024] (Lamp body 2) The lamp body 2 is formed by injection molding using a hard synthetic resin material. A seal groove 2b is formed on the periphery of the front opening 2a (see Figure 3) of the lamp body 2 for engaging with the seal leg 4b provided on the periphery of the front cover 4. On the outer surface of the periphery of the front opening 2a of the lamp body 2, vehicle body mounting portions 5a to 5f (see Figure 4) are provided to protrude in accordance with the shape of the mounting portion on the vehicle body side for attachment to the vehicle body.

[0025] The lamp body 2 has a rear wall 20 as one of its constituent surfaces, which is the surface facing the front opening 2a (see Figure 3). 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, creating a continuous surface without bends or steps.

[0026] As shown in Figure 2, in the first 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-rear 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.

[0027] The rear wall 20 integrates with the surrounding walls of the rear wall 20, namely the ceiling wall, left and right side walls, and the bottom wall. While the lamp body 2 has a small forward protrusion relative to its overall size, the front cover 4 has a shape that bulges significantly forward. The vehicle lamp 1 is configured such that a soup bowl-shaped lamp body 2 with a small protrusion is covered 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 house each lamp unit.

[0028] 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 which bulges toward the rear (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 the first embodiment, it is formed over 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.

[0029] 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.

[0030] 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. Hereinafter, structures for attaching such parts will be collectively referred to as part mounting sections. The protrusions 22 are provided on the periphery of the recesses 21, although they are sometimes interrupted by the part mounting sections. The protrusions 22 are formed on at least a part of the edge of the recesses 21, and even if they are provided intermittently in several places by the part mounting sections, they are formed to border the outer circumference of the recesses 21. Similarly, part mounting sections 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 29 to which a filter is attached is formed as a part mounting section, and bosses B are provided near the left and right edges as part mounting sections.

[0031] 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, and they are wide and have a large projection amount. In contrast, as shown in Figure 2, the protrusions 22 formed on the upper edge of the recess 21 have a cross-section that is a curved line that is convex to the rear, and they are narrow and have a small projection amount. Thus, the radius of curvature and width of the protrusions 22 do not have to be constant.

[0032] The lamp body 2 has many parts to which it can be attached, and such parts can be attached to recesses 21 or protrusions 22. The cross-section of the protrusion 22 is a curved line that protrudes to the rear, excluding such parts that can be attached. 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.

[0033] 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.

[0034] In the first 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.

[0035] (Caldera structure) The rear wall 20 is formed by a convex portion 22 that is formed in an annular shape around the periphery of a recess 21 that is recessed in front. As a result, the outer shape is formed in a caldera shape, and the cross-sectional shape of the rear wall 20 of the lamp body 2 is configured as a wave-like shape with a series of complex curves.

[0036] 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 wall thickness.

[0037] The effects and advantages 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.

[0038] 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.

[0039] 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.

[0040] Thus, the lamp 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 recess 21, which has a substantially circular outer shape. However, 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.

[0041] The ramp body 2 is constructed primarily in a corrugated shape with no bends in its cross-section, due to the recesses 21 and protrusions 22, thereby suppressing stress concentration at the corners and improving rigidity. This improved rigidity also allows for thinner walls, resulting in weight reduction. 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 of 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.

[0042] 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 portion of the rear wall 20 is described as having the portion of reference numeral 21 protruding toward the front and the portion of reference numeral 22 recessed toward the rear along the outer edge of reference numeral 21. Both configurations represent the same configuration.

[0043] 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.

[0044] 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, relative 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.

[0045] Further, by providing the seal groove 2b so as to reduce the amount of protrusion of the lamp body 2 in the front-rear direction and to border the outer periphery of the rear wall 20 where the stress is most applied, the rigidity of the lamp body 2 is improved.

[0046] (Beam structure) Further, as shown in FIG. 4, in the lamp body 2 of the present embodiment, a first beam 61 and a second beam 62, which form a part of the rear wall 20, extend from the upper end portion to the lower end portion of the recess 21 in the rear wall 20. The first beam 61 and the second beam 62 extend straight in the vertical direction and are connected to the convex portion 22.

[0047] As shown in FIG. 4, the first beam 61 extends in the vertical direction at a position closer to the left from the center within the recess 21 (since FIG. 4 is a rear view, it is closer to the right side in FIG. 4), and is connected to the convex portion 22 provided on the outer periphery of the recess 21 at the upper end and the lower end. The second beam 62 extends in the vertical direction at a position closer to the right from the center within the recess 21 (similarly, closer to the left side in FIG. 4), and is connected to the convex portion 22 provided on the outer periphery of the recess 21 at the upper end and the lower end.

[0048] In the convex portion 22 configured in an annular shape, the convex portions 22 at the upper edge and the lower edge of this annulus have a smaller amount of protrusion and width than the convex portions 22 at the right edge and the left edge (see FIGS. 2 and 3), and the first beam 61 and the second beam 62 extending vertically generally extend from the upper end portion to the lower end portion of the rear wall 20.

[0049] Both the first beam 61 and the second beam 62 form a part of the rear wall 20, and a cross-section orthogonal to the extending direction, that is, a horizontal cross-section, is a convexly curved shape facing the rear. Further, each beam is smoothly connected to the rear wall other than the beam via a ridge line, and the corresponding cross-sectional shape of the lamp body 2 is continuously configured without a bent portion while maintaining a constant wall thickness.

[0050] 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 lamp 1.

[0051] 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 to the rear and convex to the front, adjacent sections are connected smoothly and continuously by curving with the same curvature without forming steps or corners.

[0052] 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 shape 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.

[0053] (Girder 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 a 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 in a curved linear shape. In the first embodiment, the vertical cross section of the first girder 71 is a curved linear shape that is convex toward the rear. However, it is not limited to this, and the direction in which the first girder 71 protrudes does not matter whether it is forward or backward. Similarly, the direction in which the beams protrude does not matter whether it is forward or backward.

[0054] As shown in Figure 3, a first girder 71 is provided that forms part of the rear wall 20 and extends horizontally, 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.

[0055] 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, second beam 62, and 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, second beam 62, and first girder 71 in an H shape on the rear wall 20.

[0056] (Effects of the ramp body 2) The effects of the entire ramp body 2 will be explained. Figure 6 is an explanatory diagram illustrating the structure of the ramp body 2 shown in Figure 1. 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 a circular and H-shaped structure, which have high load-bearing capacity, on the rear wall 20 improves the load-bearing capacity of the rear wall 20.

[0057] 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 toward the rear, and they constitute a part of the rear wall 20. At the boundary ends of each, they are curved with the same curvature and connected smoothly and continuously, 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.

[0058] 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.

[0059] (Optical axis adjustment section, vehicle body mounting section) 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.

[0060] 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.

[0061] 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 is improved.

[0062] In particular, in the first 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Similarly, the vehicle 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 vehicle 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.

[0067] (Modification) In the first embodiment, only two beams and one girder were provided, but this is not limited to this, and three or more beams and two or more girders may be provided. Figure 7 shows a modified example of a ramp body 2A.

[0068] 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, a first girder 71 and a 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 alternately in the 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 linear shape, the convex direction of each cross-sectional curve may protrude in the same direction, either forward or backward, or in different directions.

[0069] [Second Embodiment] A second embodiment of the present disclosure will now be described with reference to the drawings. The vehicle light fixture 101 according to the second embodiment has the same configuration as the vehicle light fixture 1 according to the first embodiment described above, except for the details to be described later. For this reason, for the sake of convenience, the description of components having the same reference numerals as components already described in the description of the first embodiment will be omitted.

[0070] Referring again to Figure 1, the vehicle lighting fixture 101 according to the second embodiment comprises a lamp body 102 and a front cover 4 assembled to the front opening of the lamp body 102. Figure 8 is a rear view showing the schematic configuration of the lamp body 102 according to the second embodiment. Figure 9 is an explanatory diagram illustrating the structure of the lamp body 102 according to the second embodiment. Figure 10 is a schematic front view of the lamp body 102 according to the second embodiment, showing the lamp body 102 with a high beam lamp unit Hi and a low beam lamp unit Lo attached.

[0071] (Optical axis adjustment section) Here, we will describe the outline of the optical axis adjustment section equipped with a characteristic component mounting section (first aiming mounting section E1) of the vehicle lamp 101 according to the second embodiment. As shown in Figure 10, the lamp body 102 according to the second embodiment is provided with first to third aiming mounting sections E1 to E3 as an optical axis adjustment section for adjusting the optical axis of the high beam lamp unit Hi and the low beam lamp unit Lo. Hereinafter, when referring to the high beam lamp unit Hi and the low beam lamp unit Lo together, we will simply refer to them as lamp unit L.

[0072] The first aiming attachment portion E1 is provided at the joint between the first beam 61 and the first girder 71. The second aiming attachment portion E2 is provided at the lower end of the second beam 62. The third aiming attachment portion E3 is provided at the joint between the second beam 62 and the first girder 71. In other words, the first and third aiming attachment portions E1 and E3 are formed at both ends of the first girder 71.

[0073] As shown in Figure 8, the first aiming mounting portion E1 has a first aiming member mounting hole 306, the second aiming mounting portion E2 has a second aiming member mounting hole 307, and the third aiming mounting portion E3 has a cylindrical boss 308.

[0074] As shown in Figure 10, the lamp unit L is attached to a roughly rectangular plate-shaped support member 301, which has roughly rectangular first extensions 303, second extensions 304, and third extensions 305 formed on its upper right, lower left, and upper left sides, respectively. The first extension 303 and second extension 304 have rectangular first through holes 309 and 310, respectively. The third extension 305 has a circular third through hole 311. The first through hole 309, second through hole 310, and third through hole 311 are formed in positions corresponding to the first aiming member mounting hole 306, the second aiming member mounting hole 307, and the boss 308, respectively.

[0075] In the first aiming mounting section E1, a first mount 350, described later, is attached to the first through hole 309, and a first aiming screw 340 is screwed into the first mount 350 via a first aiming member mounting hole 306. In the second aiming mounting section E2, a second mount 351, having the same configuration as the first mount 350, is attached to the second through hole 310, and a second aiming screw 341 is screwed into the second mount 351 via a second aiming member mounting hole 307. In the third aiming mounting section E3, a spherical receiver 314 is attached to the third through hole 311, and the ball of a ball pin (not shown) attached to a boss 308 is supported by the spherical receiver 314, forming a ball joint structure.

[0076] With the above configuration, the first aiming screw 340 and the second aiming screw 341 are rotated axially relative to the first aiming member mounting hole 306 and the second aiming member mounting hole 307, respectively, thereby screwing in the first mount 350 and the second mount 351. This allows the support member 301 to tilt freely in the horizontal and vertical directions, with the ball joint structure as the pivot point. In this way, the optical axis of the lamp unit L is adjustable.

[0077] Incidentally, the first aiming screw 340 and the second aiming screw 341 are subjected to a large load. For this reason, in addition to the first aiming member mounting hole 306, the first aiming mounting portion E1 is formed with a first slide support portion 320 that supports the first mount 350. Furthermore, in addition to the second aiming member mounting hole 307, the second aiming mounting portion E2 is formed with a second slide support portion 360 that supports the second mount 351.

[0078] Among these, the first aiming screw 340, which is mounted above the support member 301 and is located near the center of the lamp body where rigidity is lower compared to the outer edge, is subjected to a particularly large load. For this reason, the first aiming mounting section E1 requires a structure that enhances rigidity. Therefore, in this specification, the first aiming mounting section E1 will be described in detail as a component mounting section.

[0079] On the other hand, the second aiming mounting portion E2, to which the second aiming screw 341, which is attached below the support member 301, is attached, is provided near the relatively rigid seal groove 2b. This second slide support portion 360 engages with the second mount 351 by utilizing the peripheral wall integrally formed with the rear wall 120 of the ramp body 102. By engaging and supporting the second mount 351, it shares the load applied to the second aiming screw 341, thereby reducing the bending stress on the second aiming screw 341. Since this configuration is conventionally known, a detailed explanation and illustration are omitted.

[0080] Furthermore, the first to third aiming mounting sections E1 to E3 are rigid in cooperation with the rigidity of the support member 301, by supporting the support member 301 to which the lamp unit L is attached. Also, as will be described later, the structure is designed to be rigid in order to support the support member 301. In the vehicle lighting fixture 101, the rigidity of the lamp body 102 is increased by incorporating such a rigid structure as part of a beam or girder.

[0081] In particular, in the second embodiment, a second aiming attachment portion E2 and a third aiming attachment portion E3 are formed at both ends of the first girder 71, which is the joint between the beam and the girder, thereby improving the rigidity of both the beam and the girder, and consequently improving the rigidity of the rear wall 120 and the ramp body 102.

[0082] Thus, the mounting section has high rigidity due to its configuration for attaching other components. Taking advantage of this, it is preferable to configure the mounting section not only to be limited to the optical axis adjustment section, but also to be positioned on a beam or girder.

[0083] (Detailed structure of the first aiming mounting section E1, which is a component mounting section) Here, the configuration of the first aiming mounting section E1 as a component mounting section will be described in detail. Figure 11 is a front view of the first aiming mounting section E1 of the lamp body 102 to which the first aiming screw 340 is attached. Figure 12 is a perspective view of the same first aiming mounting section E1. Figures 13, 14, and 15 are end views of the first aiming mounting section E1 cut along the line C-C in Figure 11, the line D-D in Figure 11, and the line E-E in Figure 12, respectively. For the convenience of drawing, in Figures 11 to 15, only the first extension 303 of the support member 301 is shown. In Figure 11, the first beam 61 and the first girder 71 are shown in light gray. Furthermore, in the following explanation, the first slide support portion 320 will be simply referred to as the slide support portion 320, and the explanation will be based on the orientation of the state in which the first mount 350 is attached to the slide support portion 320 (hereinafter simply referred to as the attached state).

[0084] As described above, the first aiming mounting portion E1 includes a first aiming member mounting hole 306, which is a component mounting hole, and a first slide support portion (hereinafter simply referred to as the slide support portion in the description of the first aiming mounting portion E1) 320, which is formed above the first aiming member mounting hole 306 and opens toward the first aiming member mounting hole 306, and has a U-shaped cross-section (for ease of understanding, the U-shape is shown in light gray in Figure 15). The slide support portion 320 has a first wall 324 that extends left and right opposite the opening 322, a second wall 326 that extends downward from one end (left end) of the first wall 324, and a third wall 328 that extends downward from the other end (right end) of the first wall. The third wall 328 has an extension portion 329 that extends downward below the lower end of the opposing second wall 326.

[0085] Hereafter, the first wall 324, the second wall 326, and the third wall 328 will be collectively referred to as the three walls 323. Each of the three walls 323 has a smooth curved outer surface, and the first wall 324 and the second wall 326, and the first wall 324 and the third wall 328 are smoothly continuous via ridges. As a result, the slide support portion 320 is formed entirely of smooth curved surfaces.

[0086] An opening 322, that is, the inner side of the lower end of the second wall 326, has a first inner flange 331 that extends along the entire length in the front-to-back direction of the space defined by the three walls 323. Furthermore, a second inner flange 332 is formed on the third wall 328, facing the first inner flange 331. Hereinafter, the space defined by the three walls 323, the first inner flange 331, and the second inner flange 332 will be referred to as the slide space 330.

[0087] As can be seen from Figures 13 to 15, the first to third walls 324, 326, and 328 smoothly continue from the rear wall 120 without bending and form part of the rear wall 120. Specifically, the first wall 324 is a hollow double wall having an outer wall 324a extending with the same thickness as the rear wall 120, a front wall 324c, and an inner wall 324b. Similarly, the second wall 326 is a hollow double wall having an outer wall 326a extending with the same thickness as the rear wall 120, a front wall 326c, and an inner wall 326b. The third wall 328 is similar. Furthermore, the internal spaces of the first to third walls 324, 326, and 328 are in communication up to the extension 329. On the other hand, the first inner flange 331 and the second inner flange 332 are thicker and solid than the rear wall.

[0088] In this way, the walls constituting the slide support portion 320 form part of the rear wall 120, and the entire structure is configured to have a smooth curved surface, so that portion becomes a double wall, increasing the rigidity of the slide support portion 320. Furthermore, because it smoothly and continuously forms part of the rear wall 120 without bending, and the entire structure is formed with a smooth curved surface, stress is distributed, increasing the strength of the slide support portion 320. In addition, the fact that the first inner flange 331 and the second inner flange 332 are thicker and solid than the rear wall also contributes to ensuring the rigidity of the three walls 323.

[0089] The first wall 324 is thicker than the second wall 326 and the third wall 328, and the third wall 328 is thicker than the second wall 326. This ensures that the slide support 320 can withstand the downward load that it receives most heavily.

[0090] As shown in Figure 11, the first aiming mounting section E1 is provided at the intersection of the first beam 61 and the first girder 71, and the three walls 323 constitute a part of the first beam 61. The second wall 326 is smoothly continuous with the first girder 71 at its lower end. This further enhances the rigidity of the slide support section 320 by incorporating the shapes of the beams and girders that contribute to the rigidity of the ramp body 2 into the slide support section 320. On the other hand, by integrating the shape of the slide support section 320, which has a particularly rigid structure, to conform to the shapes of the surrounding beams and girders, it contributes to further strengthening the rigidity in addition to ensuring the rigidity of the ramp body 102 through the cooperation of the support members 301 (parts to be mounted) as described above.

[0091] As shown in Figures 12 to 14, the outer wall 324a of the first wall 324 slopes downward as it extends forward, and the inner wall 324b of the first wall 324 slopes slightly upward as it extends forward. In other words, the first wall 324 tapers from the base to the tip. The second wall 326 and the third wall 328 also taper from the base to the tip. In this way, the three walls 323 bulge smoothly from the rear wall 120 without bending, and the base is thicker than the tip, which also contributes to the increased rigidity of the structure.

[0092] Furthermore, the front wall 324c of the first wall 324 protrudes smoothly forward from the front end of the outer wall 324a, and as it moves backward along the ridge, it inclins toward the center of the front view of the slide space 330, and is continuous with the front end of the inner wall 324b that defines the slide space 330. The front wall 326c of the second wall 326 also protrudes smoothly forward from the front end of the outer wall 326a, and as it moves backward along the ridge, it inclins toward the center of the front view of the slide space 330, and is continuous with the front end of the inner wall 326b, although the amount of forward protrusion is smaller compared to the front wall 324c of the first wall 324. The same applies to the third wall 328, and the first inner flange 331 and the second inner flange 332. As a result, the front end of the slide support portion 320 has a shape in which the front walls (324c, 326c, 328c) of the three walls 323 protrude forward and continue in a mortar-like shape to the front end of the slide space 330.

[0093] On the other hand, as shown in Figure 14, the upper surfaces of the first inner flange 331 and the second inner flange 332 facing the slide space 330 are horizontal, and they become thicker from the front end towards the rear. In the slide space 330, the space between the first inner flange 331 and the second inner flange 332 and the inner wall 324b of the first wall 324 facing the first inner flange 331 and the second inner flange 332 becomes narrower from the front end towards the rear.

[0094] As described above, the first aiming screw 340 is inserted into the first aiming member mounting hole 306 and supported so as to be rotatable. The first aiming screw 340 is made of resin, is generally cylindrical in shape, and includes a rotational support portion 342 for rotatably supporting the lamp body 102, and a threaded portion 344 that is screwed into the first mount 350. The rotational support portion 342 includes a gear portion 343, and the rotation of the first aiming screw 340 is made possible by engaging a Phillips screwdriver (not shown), which is inserted from the jig guide portion (second slide support portion 360 shown in Figure 11) of the lamp body 102, with the gear portion 343 and performing a rotational operation.

[0095] On the screw portion 344 side of the rotation support portion 342, a pair of cantilever-shaped locking pieces 346 are provided, extending radially outward from the screw portion 344 toward the gear portion 343. When the first aiming screw 340 is attached to the first aiming member mounting hole 306, the locking pieces 346 elastically engage with the inner edge of the first aiming member mounting hole 306, preventing the first aiming screw 340 from falling out.

[0096] As shown in Figures 13 and 15, the first mount 350 is a resin molded product and, when attached to the slide support portion 320, comprises a nut portion 352 that screws into the first aiming screw 340 and fits into and secures the first through hole 309 formed in the first extension portion 303 of the support member 301, a slide portion 354 that is housed in the slide space 330, and a connecting portion 353 that connects the nut portion 352 and the slide portion 354.

[0097] The sliding portion 354, when mounted, has a flat base portion 354a extending in the front-rear direction, a pivot wall 354b erected along the front-rear direction at the left-right center of the base portion 354a, and a plate-shaped spring portion 354d of approximately the same dimensions, integrally attached to the upper end of the pivot wall 354b and provided approximately parallel to the base portion 354a. When the spring portion 354d is not mounted on the slide support portion 320, it extends diagonally upward from the center outwards to the left and right, as shown by dashed lines in Figure 14. When mounted, the spring portion 354d is bent downward, generating an upward biasing force as shown by arrow Y.

[0098] In the installed state, the first inner flange 331 and the second inner flange 332 engage with the left and right side edges of the lower surface of the base portion 354a. Protrusions are formed inward from the left and right side edges of the lower surface of the base portion 354a, extending in the front-rear direction, restricting the left-right movement of the first mount 350 in the slide space 330.

[0099] The connecting portion 353 is formed below the base portion 354a and on the extension of the pivot wall 354b. As shown in Figures 12 and 13, the nut portion 352 has a cylindrical shape that extends in roughly the front-rear direction when installed. The front end of the nut portion 352 is separated into upper and lower parts, and two engaging claws 352a to 352d are formed on the upper and lower parts, front and rear respectively. The rear end has an enlarged funnel shape. The first mount 350 and the support member 301 are fixed by inserting the first aiming screw 340 from the rear end while the engaging claws 352a to 352d are engaged with the first through hole 309 of the first extension portion 303.

[0100] When attaching the first mount 350 to the slide support 320, the spring portion 354d is biased slightly downward, and the mount is inserted from the front of the slide support 320. The first mount 350 slides backward so that the left and right side edges of the lower surface of the base portion 354a are guided by the first inner flange 331 and the second inner flange 332. In the slide space 330, the space between the first inner flange 331 and the second inner flange 332 and the inner wall 324b of the first wall 324 facing the first inner flange 331 and the second inner flange 332 narrows as you move from the front end towards the rear. As a result, the further the first mount 350 is inserted, the greater the biasing force of the spring portion 354d becomes, and the slide support 320 securely holds the first mount 350.

[0101] Furthermore, as described above, the front end of the slide support portion 320 has three front walls (324c, 326c, 328c) of the three walls 323 that protrude forward and continue in a mortar-like shape to the front end of the slide space 330. With this configuration, when the first mount 350 is brought close to the slide support portion 320 to be attached, the slide portion 354 is naturally guided into the slide space 330, making the attachment work of the first mount 350 easier.

[0102] The configurations of the first aiming screw 340 and the first mount 350 are publicly known. Furthermore, it goes without saying that any similar mechanism that can be attached to the slide support portion 320 and the first aiming member mounting hole 306 can be used in the vehicle lighting fixture of this embodiment.

[0103] The effects and advantages of the vehicle lighting fixture 101 according to the second embodiment will be explained again below. Conventionally, the slide support portion provided on the aiming mounting portion at the top of the support member on which the lamp unit is mounted was not continuous with the rear wall, but rather protruded from the rear wall and erected upright. Therefore, in order to ensure load-bearing capacity, it was necessary to make the slide support portion thicker and to further reinforce it with a large number of ribs. As a result, the weight of the lamp body increased.

[0104] In the second embodiment, the walls constituting the slide support portion 320 (first wall 324, second wall 326, and third wall 328) are configured to form a part of the rear wall, so that part becomes a double wall, and rigidity is increased even with a thin wall. Furthermore, since the entire wall constituting the slide support portion is configured to have a smooth curved surface, the stress generated in the slide support portion by supporting the support member is distributed, and the strength around the slide support portion is increased. Note that the three walls constituting the slide support portion 320 do not necessarily have to be three orthogonal walls as shown in the figure. Any wall that surrounds three sides of the supported member (in this case, the slide portion 354 of the first mount 350) is sufficient, and the shape is not limited to the figure as long as the outer shape is composed of a smooth curved surface.

[0105] In the second embodiment, all three walls 323 are configured to form part of the rear wall 120, i.e., to form a double wall. Making all three walls 323 double walls allows for greater rigidity compared to the case where only a part is double walled, which is particularly advantageous for achieving both rigidity and weight reduction of the lamp body 102. However, it is not essential that all three walls 323 form part of the rear wall 120; if at least a part forms part of the rear wall 120, that part can achieve both weight reduction and rigidity, making it possible to make the lamp body lighter than in the conventional design.

[0106] Furthermore, the base portion 354a of the first mount 350 engages with the first inner flange 331 and the second inner flange 332, and a biasing force is applied by the action of the spring portion 354d. Forming the first inner flange 331 and the second inner flange 332 solid is advantageous in ensuring sufficient strength to withstand such biasing forces. Since the first inner flange 331 and the second inner flange 332 are small parts of the slide support portion 320, making them solid has little impact on reducing the weight of the lamp body.

[0107] This does not prevent the first inner flange 331 and the second inner flange 332 from being configured to form part of the rear wall 120, that is, to be made into a double wall. As described above, since the first inner flange 331 and the second inner flange 332 are relatively small parts of the slide support portion 320, if they are made into a double wall, the weight may be greater than if they were made into a solid wall. Thus, whether or not the first inner flange 331 and the second inner flange 332 are solid can be designed according to the size of the inner flanges and the strength required of the inner flanges.

[0108] Furthermore, by configuring the slide space 330 such that the space between the first inner flange 331, the second inner flange 332, and the first inner wall facing the first inner flange 331, the second inner flange 332 narrows as it moves towards the rear, the component that slides and engages to be fixed inside the slide support is pushed backward, increasing the biasing force of the spring portion 354d, which enables the slide support 320 to securely hold the first mount 350. This makes it possible to prevent vibration of the component and limit the generation of vibration stress.

[0109] Furthermore, in the second embodiment, the first aiming mounting portion E1 is provided at the intersection of the first beam 61 and the first girder 71, and the three walls 323 constitute a part of the first beam 61. It is not essential that it is provided at the intersection of the beam and girder; it is sufficient if it is provided on either one. In this way, the shape of the beam and / or girder that contribute to the rigidity of the ramp body 102 is incorporated into the slide support portion 320, further increasing the rigidity of the slide support portion 320. On the other hand, by integrating the shape of the slide support portion 320, which has a particularly rigid structure, so as to conform to the shape of the surrounding beam and girder, it is possible to further enhance the rigidity in addition to ensuring the rigidity of the ramp body 102 through the cooperation of the support members 301 (parts to be mounted) as described above.

[0110] In the second embodiment, the third wall 328 includes an extension 329 that extends beyond the lower end of the second wall 326 and away from the first wall. The inclusion of the extension 329 is not mandatory; for example, the third wall 328 may be the same length as the second wall 326. The extension of the third wall beyond the second wall increases the length of the double-wall portion, resulting in greater rigidity.

[0111] [Third Embodiment] A third embodiment of the present disclosure will now be described with reference to the drawings. The vehicle light fixture 201 according to the third embodiment has the same configuration as the vehicle light fixture 1 according to the first embodiment described above, except for the details to be described later. Figure 16 is a schematic front view of the vehicle light fixture 201 according to the third embodiment of the present invention. The vehicle light fixture 201 is a headlight for a motorcycle and is a combination lamp that houses a plurality of lamp units.

[0112] As shown in Figure 16, the vehicle lamp 201 comprises a container-shaped lamp body 202 with an opening 202a (see Figure 17, described later) formed at the front, and a front cover 204 that is assembled to the front opening 202a (see Figure 17) of the lamp body 202. The front cover 204 is made of a light-transmitting resin such as polycarbonate or glass, and when the front cover 204 is attached to the front opening 202a (see Figure 17) of the lamp body 202, a lamp chamber S is defined on the inside.

[0113] Figure 17 is a vertical end view of the vehicle lighting fixture 201, cut along the line A-A in Figure 16. Figure 18 is a horizontal end view of the vehicle lighting fixture 201, cut along the line B-B in Figure 16. The internal structure of the lighting room is omitted in Figures 17 and 18.

[0114] The lamp body 202 is formed by injection molding using a rigid synthetic resin material. As shown in Figure 17, a seal groove 202b is formed on the periphery of the front opening 202a of the lamp body 202 for engaging with the seal leg 204b provided on the periphery of the front cover 204. As shown in Figures 16 and 17, vehicle body mounting portions 205a to 205f are provided protruding from the outer surface of the periphery of the front opening 202a of the lamp body 202, corresponding to the shape of the mounting portion on the vehicle body side, for attachment to the vehicle body.

[0115] As shown in Figure 18, the lamp body 202 has a rear wall 220 behind the opening 202a as one of its constituent surfaces. The rear wall 220 is mainly composed of a curved surface (details will be described later), and is connected via ridges to the other constituent surfaces of the lamp body, which are the ceiling wall, bottom wall, and left and right side walls that project forward. Each constituent surface of the lamp body 202 has a gently curved shape, and is gently curved at each other's edges, connecting them continuously without bends or steps. Each constituent surface of the lamp body 202 has a shape that is smoothly continuous with the rear wall 220, and is integrally molded to form a soup bowl-shaped lamp body 202 with a small amount of protrusion. The lamp body 202 is covered by a dome-shaped front cover 204 that bulges out significantly forward.

[0116] As shown in Figures 17 and 18, the vehicle light fixture 201 is configured so as not to interfere with the ABS device U located behind the vehicle light fixture 201. Specifically, as shown in Figure 18, a recess 221 is formed in the rear wall 220 of the lamp body 202, which curves inward toward the lamp chamber S at the front. Furthermore, a convex portion 222 is formed on the outer peripheral edge of the recess 221, which is the rear end of the recess 221 that bulges forward, and extends from the outer peripheral edge toward the rear. The convex portion 222 is provided on at least a part of the outer peripheral edge of the recess 221 and is formed along the outer peripheral edge. In this embodiment, the convex portion 222 is formed around almost the entire circumference of the recess 221, and the overall outer shape of the recess 221 is formed to be approximately annular in shape to match the outer shape of the approximately circular recess 221.

[0117] The recess 221 and the protrusion 222 constitute part of the rear wall 220 of the lamp body 202. The rear wall 220 itself is curved to form the recess 221 and the protrusion 222. The end face perpendicular to the direction of extension of the circumferentially extending protrusion 222 is a curved line that protrudes backward, as shown in Figure 18. The recess 221 and the protrusion 222 are continuous at their edges and are smoothly connected without bends or steps. Since the recess 221 and the protrusion 222 are mainly composed of curved surfaces and are smoothly continuous without steps, the rear wall 220 is continuously constructed without bends while maintaining a constant thickness. As described above, all of the constituent surfaces of the lamp body 202 are smoothly continuous with the rear wall 220 without bends, and not only the rear wall 220, but the lamp body 202 itself is mainly composed of curved surfaces and is continuously constructed without bends while maintaining a constant thickness.

[0118] Here, the lamp body 202 has many parts that are not shown in the illustration, such as bosses and protrusions for attaching optical members of each lamp unit, control units, aiming screws, etc. The protrusions 222 are provided on the periphery of the recess 221, although they are interrupted in some places by the aforementioned part attachment parts. The end faces of the protrusions 222, perpendicular to their extending direction, are all configured as curved lines that protrude backward, although their respective radii of curvature, widths, and protrusion amounts differ. The protrusions 222 are formed on at least a part of the edge of the recess 221, and even if they are provided intermittently in several places by the aforementioned attachment parts, they are formed to border the outer circumference of the recess 221. Similarly, the aforementioned attachment parts may also be provided on a part of the recess 221. In the third embodiment, the protrusions 222 are formed along the outer edge of the recess 221 and are formed in an annular shape overall. The protrusions 222, which are formed to protrude smoothly toward the rear in an annular shape, have a semi-donut shape when viewed from behind.

[0119] As described above, the end face shape of the rear wall 220 of the lamp body 202 is composed of a wave-like shape with a series of complex curves. A convex portion 22 is formed in an annular shape on the periphery of the recess 21 that is recessed in front, resulting in a caldera-like outer shape. The rear wall 220 is integrated with the surrounding walls, namely the ceiling wall, bottom wall, and left and right side walls, and at the boundary portions, they curve with the same curvature and are smoothly and continuously connected. As a result, the lamp body 202 itself is mainly composed of curved surfaces, the formation of corners is reduced, and the wall thickness is kept generally constant.

[0120] As shown in Figures 17 and 18, the ramp body 202 is configured with a corrugated shape at its end face, without any bends, due to the recesses 221 and protrusions 222. This suppresses stress concentration at the corners, thereby improving rigidity. The improved rigidity also allows for thinner walls, resulting in weight reduction. 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. The ramp body 202 may also be configured such that the recesses are recessed towards the rear and the protrusions project forward along the outer edge of the recesses. Even in the reverse configuration, the aforementioned recesses and protrusions form a caldera-like unevenness on the rear wall 220, improving the rigidity of the ramp body.

[0121] Figure 19 shows a schematic rear view of the lamp body 202 as seen from the rear. In the lamp body 202 of this embodiment shown in Figure 19, a first beam 261 and a second beam 262, which constitute a part of the rear wall 220, are formed extending from the upper end to the lower end of the recess 221. The first beam 261 and the second beam 262 continue to extend vertically and connect to the protrusion 222.

[0122] As shown in Figure 19, the first beam 261 extends vertically within the recess 221, positioned slightly to the left of the center when viewed from the rear of the rear wall 220, and is connected at its upper and lower ends to the protrusions 222 provided on the outer circumference of the recess 221. The second beam 262 extends vertically within the recess 221, positioned slightly to the right of the center when viewed from the rear of the rear wall 220, and is connected at its upper and lower ends to the protrusions 222 provided on the outer circumference of the recess 221.

[0123] The upper and lower edges of the protrusions 222 are smaller in both protrusion and width than the right and left edges of the protrusions 222 (see Figures 17 and 18), and the vertically extending first beam 261 and second beam 262 extend roughly from the upper end to the lower end of the rear wall 220. As shown in Figures 17 and 18, the rear wall 220 without the first beam 261, second beam 262, and the first girder 271 (described later) is referred to as the rear wall body 229.

[0124] Both the first beam 261 and the second beam 262 have end faces perpendicular to the extension direction, i.e., horizontal end faces, which are curved lines that are convex toward the rear (see Figure 18), and form part of the rear wall 220. Furthermore, each beam is smoothly connected to the rear wall body 229 via ridges, and the corresponding end face shapes of the ramp body 202 are constructed continuously without bends while maintaining a constant thickness.

[0125] The first beam 261 and the second beam 262, which extend long in the vertical direction, give the ramp body 202, including the rear wall 220, a structure that is resistant to deformation under load. Since the first beam 261 and the second beam 262 themselves are curved surfaces that distribute stress, the rear wall 220 has a more rigid structure that is more resistant to deformation. As a result, the rigidity of the ramp body 202 is improved, and this improved rigidity allows for thinner walls and thus weight reduction.

[0126] As shown in Figure 17, the recess 221 and the protrusion 222, and the first beam 261 and second beam 262 formed on the protrusion 222, are connected via ridges. While maintaining the shape of each end face as a curved line that is convex backward / convex forward, adjacent parts are connected smoothly and continuously by curving with the same curvature without forming steps or corners.

[0127] Furthermore, the rear wall 220 is 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. As a result, the end face shape of the ramp body 202 is composed of a wave-like shape with a series of complex curves. Therefore, the ramp body 202 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 202 is improved, and the thickness of the ramp body 202 can be reduced.

[0128] Furthermore, as shown in Figure 19, a first girder 271 extending in the left-right direction is formed approximately in the center of the rear wall 220, connected to the first beam 261 and second beam 262 extending in the vertical direction. As shown in Figure 18, the first girder 271 also constitutes a part of the rear wall 220 of the ramp body 202, and the end face shape (vertical end face) perpendicular to the extension direction is configured as a curved line. In this embodiment, the vertical end face of the first girder 71 is a curved line that is convex toward the rear.

[0129] As shown in Figure 19, the provision of the first girder 271 extending horizontally causes the rear wall 220 to have a wave-like shape with repeated undulations on its end surface in the vertical direction as well. Since the first girder 271 itself is a curved surface that distributes stress, the rear wall 220 has a more rigid structure that is more resistant to deformation. This improves the rigidity of the ramp body 202, and the improved rigidity allows for thinner walls and thus weight reduction. Since a part of the rear wall 220 becomes a beam / girder, the rigidity of the ramp body 202 can be improved without adding reinforcing members.

[0130] In addition, since the first beam 261 and the second beam 262 extend vertically, and the first girder 271 extends horizontally and connects to both beams at both ends, the first beam 261, the second beam 262, and the first girder 271 form an H shape. The H-shaped reinforcement is strong against both vertical and horizontal loads, and firmly reinforces the ramp body 202. The rigidity of the ramp body 202 is further increased by the H-shaped arrangement of the first beam 261, the second beam 262, and the first girder 271 on the rear wall 220.

[0131] Furthermore, as shown in Figure 19, a second girder 272 extending in the left-right direction is formed below the first girder 271 on the rear wall 220. The second girder 272 also constitutes a part of the rear wall 220 of the lamp body 202, and the end face shape (vertical end face) perpendicular to the extension direction is configured as a curved line. However, in this embodiment, as shown in Figure 18, the vertical end face of the second girder 272 has a curved line shape that is convex forward toward the lamp chamber S, unlike the first girder 271 which is convex backward. The left and right ends of the second girder 272 are also connected to the first beam 261 and the second beam 262 which extend in the vertical direction, and together with the first beam 261 and the second beam 262, they form an H-shape, thereby constructing a robust lamp body 202 that is strong against loads in both the vertical and horizontal directions, and further increasing the rigidity of the lamp body 202 through improved rigidity of the rear wall 220. The first beam 261 and the second beam 262 have hollow cylindrical sections, with the first girder 271 convex towards the rear and the second girder 272 convex towards the front, and both are configured as vertical wall sections.

[0132] As shown in Figure 18, the front end face 271c of the first girder 271 and the front end face 272c of the second girder 272 are both formed in a curved arc shape within the vertical end face perpendicular to the extension direction, i.e., the vertical end face. The base ends of the first girder 271 and the second girder 272 are smoothly connected to the rear wall of the ramp body 202 via ridges 271d and 272d, respectively, which makes it easier to distribute stress and increases the rigidity of the ramp body 202 through improved rigidity of the rear wall 220. Furthermore, the first girder 271 and the second girder 272, which are provided in parallel, are formed as a wavy curved surface with smoothly continuous irregularities at the boundary indicated by reference numeral 273 within the vertical end face. This further makes it easier to distribute stress and increases the rigidity of the ramp body 202 through improved rigidity of the rear wall 220. Note that the direction in which the first girder 271 and the second girder 272 protrude is not limited to forward or backward.

[0133] Next, the notch 281 formed in the second girder 272, which is a vertical wall portion, will be described with reference to Figures 20 and 21. The notch 281 has a convex shape toward the front and is a recessed shape formed by cutting out a part of the second girder 272, which is extended in the horizontal direction, both vertically and to the rear, and functions as a cord clamp portion inside the lamp chamber S.

[0134] Conventional cord clamp sections were conceived by, for example, extending a plate-shaped vertical wall horizontally and forward from the flat rear wall of the lamp body, and then cutting out a portion of it vertically and rearward. However, flat vertical walls tend to lack strength, so it was necessary to reinforce them by making the vertical wall thicker or by forming multiple reinforcing ribs on the top and bottom. This reinforcement had the problem of increasing the weight of the lamp body.

[0135] In contrast, the vertical wall portion of the third embodiment, i.e., the second girder 272, as shown in Figures 17, 20, and 21, is composed of a smoothly continuous curved surface in which a part of the rear wall 220 is curved to protrude forward within the vertical end plane cut along the left-right direction. This allows sufficient rigidity to be obtained without reinforcement, eliminating the need for thick walls or the formation of ribs, and enabling weight reduction through thinning. Furthermore, the first girder 271, which is the vertical wall portion, also contributes to improving the rigidity of the ramp body 202 itself, including the rear wall 220, by forming a part of the rear wall 220 of the ramp body 202.

[0136] Furthermore, the notch 281 shown in Figures 20 and 21 is formed in the second girder 272 by discontinuing a part of the second girder 272, which is a vertical wall portion that curves to be convex toward the front. The notch 281 is defined by an opening 281a, a side wall portion 281b, and a rear surface 282c. Specifically, as shown in Figure 21, when viewed from above, the notch 281 is composed of a corrugated curved surface, with the opening 281a being a 1 / 4 hollow spherical surface facing each other, the side wall portion 281b being a semi-cylindrical surface facing each other, and the rear surface 282c being a concave curved surface that smoothly continues from the side wall portion 281b. As a result, the second girder 272 can maintain high rigidity by distributing stress even near the location where the notch 281 is formed.

[0137] Furthermore, the opening 281a of the notch 281 is composed of opposing 1 / 4 hollow spherical surfaces, and its front end is wide and continuous with the side wall 281b by a smooth convex arc surface, thus also providing a guiding effect that makes it easier to guide the power supply cord to the side wall 281b.

[0138] Furthermore, as shown in Figures 20 and 21, the second digit 272 has convex-shaped component mounting sections 272a and 272b on the left and right sides of the notch 281. The component mounting sections 272a and 272b are parts of a curved surface that is convex towards the front and is curved to protrude further forward than other parts of the second digit 272. They are formed from a collection of hollow curved surfaces that do not have bent surfaces, and have sufficient rigidity even if they are longer forward than other parts of the second digit 272. Therefore, by providing a boss section (not shown), heavy components can be supported. The notch 281, which functions as a cord clamp section in the lamp chamber S, is positioned in the left-right direction by, for example, fitting and holding power cords that extend vertically from some lamp unit provided in the component mounting sections 272a and 272b.

[0139] Furthermore, the second girder 272, which is a vertical wall section, is formed as a partition for multiple lamp units such as lamp units (Hi, Lo), and the power cords of the multiple lamp units defined by the partition are positioned and held by being inserted through the notches 281.

[0140] Although the notch 281 is formed in the second beam 272, it may also be formed as a horizontally cut-out notch in either the first beam 261 or the second beam 262, or both, which are vertical wall sections, to function as a cable clamp section that holds cables extending laterally outside the lantern room S. Alternatively, the notch 281 may be formed in the first beam 271, which is a vertical wall section, to function as a cable clamp section that holds cables extending vertically outside the lantern room S.

[0141] Furthermore, the vehicle body mounting portions 205a to 205f, to which the lamp body 202 is attached to the vehicle body, are thick and highly rigid, as these are the locations where the vehicle lighting fixture 201 is attached. Here, the vehicle body mounting portion 205a, provided on the upper edge of the outer surface of the lamp body 202, is wide and has two mounting holes 206a and 206b. The right-side mounting hole 206a, which is formed as a pair on the left and right, is formed on the extension of the first beam 261 that extends in the vertical direction. Similarly, the left-side mounting hole 206b is formed on the extension of the second beam 262 that extends in the upward direction.

[0142] As mentioned above, the rigidity of the vehicle body mounting portion 205a is increased by attaching it to a vehicle body (not shown), and in particular, the mounting holes 206a and 206b through which the engaging portion and engaging member are inserted are thick and have high rigidity. Since the mounting holes 206a and 206b are provided on the extensions of the first beam 261 and the second beam 262, the high rigidity of the vehicle body mounting portion 205a improves the rigidity of the first beam 261 and the second beam 262, and thus the rigidity of the lamp body 202 is also improved. Similarly, vehicle body mounting portions 5b and 5f are formed on the extensions of the first girder 271 which extends in the left-right direction. Since the highly rigid vehicle body mounting portions 5b and 5f are provided on the extensions of the first girder 271, the rigidity of the first girder 271 and, consequently, the rigidity of the lamp body 202 is improved.

[0143] In the third embodiment, two beams and two girders were provided, but this is not limited to this configuration; three or more beams and one or three or more girders may be provided. As long as they are configured in a curved shape, the convex direction of each end face curve may protrude in the same direction, either forward or backward, or in different directions.

[0144] Although preferred embodiments of the present invention have been described above, the first, second, and third embodiments described above 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.

[0145] As explained above, the following matters are disclosed in this specification:

[0146] (1) A vehicle lamp comprising: a container-shaped lamp body having an opening on its 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 of a recess that curves toward the front lamp chamber side and a convex portion with a curved cross-section that protrudes toward the rear from at least a part of the edge of the recess, forming part of the rear wall of the lamp body.

[0147] (2) The vehicle lamp as described in item (1), wherein the recess is formed by a plurality of curved linear beams extending vertically inside the recess and having a horizontal cross-section projecting backward, constituting a part of the rear wall of the lamp body, and the recess is formed by a curved linear girder extending horizontally and connected to the beams at both ends, having a vertical cross-section projecting backward, constituting a part of the rear wall of the lamp body.

[0148] (3) The vehicle lighting device described in item (2), wherein the optical axis adjustment unit, which is provided on the lamp body and adjusts the optical axis of the lamp housed in the lamp chamber, is provided on the beam.

[0149] (4) A vehicle lighting device as described in item (3), wherein a pair of optical axis adjustment parts are provided at both ends of the girder.

[0150] (5) The vehicle lighting fixture according to any one of items (2) to (4), wherein the outer surface of the lamp body has a vehicle mounting portion formed thereon for attachment to the vehicle body, and the vehicle mounting portion is provided on an extension of the beam or girder.

[0151] (6) A vehicle light fixture according to any one of items (2) to (5), wherein the girder is formed in multiple locations, and the multiple girders are arranged in a vertical direction with both ends connected to the same beam.

[0152] (7) A vehicle lamp comprising: a container-shaped lamp body having an opening on the front; a front cover attached to the opening and forming a lamp chamber inside, wherein a component mounting portion is formed on the rear wall of the lamp body for mounting a component to be mounted in the lamp chamber, the component mounting portion has a U-shaped slide support portion with three walls extending toward the lamp chamber, and opposing inner flanges are formed in the U-shaped opening, the slide support portion supports a part of the component in a slide space defined by the three walls and the inner flanges, at least a part of the slide support portion is continuous with the rear wall and constitutes a part of the rear wall, and the slide support portion is formed as a smooth curved surface overall.

[0153] (8) The vehicle light fixture according to item (7), wherein the three walls constituting the slide support portion are continuous with the rear wall and constitute a part of the rear wall.

[0154] (9) The inner flange is solid, the vehicle light fixture as described in item (7) or item (8).

[0155] (10) The vehicle light fixture according to any one of items (7) to (9), wherein the sliding space narrows as it moves towards the rear, between the inner flange and the inner wall facing the inner flange.

[0156] (11) The lamp body is formed in the rear wall of the lamp body as described in any one of items (7) to (10), wherein a recess is formed in the rear wall that curves toward the front lamp chamber side, and a convex portion has a curved cross-section that protrudes toward the rear from at least a part of the edge of the recess, and a plurality of curved beams have a horizontal cross-section that protrudes toward the rear, extending vertically inside the recess, and a curved girder has a vertical cross-section that protrudes toward the rear, extending horizontally and connected to the beams at both ends, and the beams and the girder are formed as part of the rear wall of the lamp body, and the component mounting portion is provided on at least one of the beams and the girder.

[0157] (12) The vehicle light fixture according to any one of items (7) to (11), wherein the three walls constitute a first wall facing the U-shaped opening, and a second wall and a third wall positioned on both sides of the first wall, the third wall extending longer in the direction away from the first wall than the second wall.

[0158] (13) A vehicle lamp comprising: a container-shaped lamp body with an opening at the front; and a front cover assembled to the front opening of the lamp body and defining a lamp chamber inside, wherein the rear wall of the lamp body has a vertical wall portion formed in a curved shape that protrudes either forward or backward, and a part of the vertical wall portion is cut out, and the vertical wall portion constitutes a part of the lamp body.

[0159] (14) The vehicle lighting fixture described in item (13), wherein the vertical wall portion has a front end surface configured in the shape of an end surface arc, and the base end of the vertical wall portion is connected to the rear wall of the lamp body via a ridge.

[0160] (15) The vertical wall portion is provided extending to define the lamp units arranged in the lamp chamber, and the notch portion through which the cords of the lamp units are inserted, the vehicle lighting fixture as described in item (13) or item (14).

[0161] (16) The corner of the vertical wall portion is configured in a hollow hemispherical shape, a vehicle light fixture as described in any one of items (13) to (15).

[0162] (17) The lamp body is a vehicle lamp according to any one of items (13) to (16), wherein the rear wall of the lamp body has a recess that curves toward the front lamp chamber and a convex end face in the shape of an arc, with at least a portion of the edge of the recess protruding toward the rear, forming a part of the wall surface of the lamp body.

[0163] (18) The recess has a plurality of beams with arc-shaped end faces that extend vertically inside the recess, and girders with arc-shaped end faces that extend horizontally and connect to the beams at both ends, and the beams and girders are formed to constitute a part of the wall surface of the lamp body, the vehicle lighting fixture as described in item (17).

[0164] (19) The vertical wall portion constitutes a part of the beam or girder, and is a vehicle light fixture as described in item (18).

[0165] This application is based on Japanese Patent Application No. 2024-208128, Japanese Patent Application No. 2024-208078, and Japanese Patent Application No. 2024-207954, filed on November 29, 2024, the contents of which are incorporated herein by reference.

Claims

1. 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 of a recess that curves toward the front towards 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.

2. The vehicle lamp according to claim 1, wherein a plurality of curved linear beams, each with a horizontal cross-section projecting rearward, extending vertically inside the recess, are formed in the recess as part of the rear wall of the lamp body, and a curved linear girder, each with a vertical cross-section projecting rearward, extending horizontally and connected to the beams at both ends, is formed in the recess as part of the rear wall of the lamp body.

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

4. The vehicle lamp according to claim 3, wherein a pair of optical axis adjustment units are provided at both ends of the girder.

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

6. The vehicle lighting fixture according to claim 2, wherein a plurality of girders are formed, and the plurality of girders are arranged in a vertical direction with both ends connected to the same beam.

7. A vehicle lamp comprising: a container-shaped lamp body having an opening on its front; a front cover attached to the opening and forming a lamp chamber inside; a component mounting portion formed on the rear wall of the lamp body for mounting a component to be mounted inside the lamp chamber; the component mounting portion has a U-shaped slide support portion with three walls extending toward the lamp chamber, with opposing inner flanges formed at the U-shaped opening; the slide support portion supports a part of the component in a slide space defined by the three walls and the inner flanges; at least a part of the slide support portion is continuous with the rear wall and constitutes a part of the rear wall; and the slide support portion is formed as a smooth curved surface.

8. The vehicle light fixture according to claim 7, wherein the three walls constituting the slide support portion are continuous with the rear wall and constitute a part of the rear wall.

9. The vehicle light fixture according to claim 7 or claim 8, wherein the inner flange is solid.

10. The vehicle light fixture according to claim 7 or claim 8, wherein the sliding space narrows as it moves towards the rear, with the space between the inner flange and the inner wall facing the inner flange becoming narrower.

11. The lamp body has a recess formed in its rear wall that curves toward the front lamp chamber side, 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, forming a part of the wall surface of the lamp body; the recess has a plurality of curved beams extending vertically inside the recess with a horizontal cross-section that protrudes toward the rear, and a curved girder extending horizontally with a vertical cross-section that protrudes toward the rear, connected to the beams at both ends; the beams and the girder form a part of the rear wall of the lamp body; and the component mounting portion is provided on at least one of the beams and the girder, as described in claim 7 or claim 8.

12. The vehicle light fixture according to claim 7 or 8, wherein the three walls constitute a first wall facing the U-shaped opening, and a second wall and a third wall positioned on both sides of the first wall, the third wall extending longer in the direction away from the first wall than the second wall.

13. A vehicle lamp comprising: a container-shaped lamp body with an open front; and a front cover assembled to the front opening of the lamp body and defining a lamp chamber inside, wherein the rear wall of the lamp body has a vertical wall portion formed in a curved shape that protrudes either forward or backward, and a part of the vertical wall portion is cut out, and the vertical wall portion constitutes a part of the lamp body.

14. The vehicle lamp according to claim 13, wherein the front end surface of the vertical wall portion is configured in the shape of an end face arc, and the base end of the vertical wall portion is connected to the rear wall of the lamp body via a ridge.

15. The vertical wall portion extends to define the lamp units arranged in the lamp chamber, and the notch portion through which the cords of the lamp units are inserted, as described in claim 13 or claim 14.

16. The corner of the vertical wall portion is configured in a hollow, semi-spherical shape, as described in claim 14.

17. The vehicle lamp according to claim 13, wherein the lamp body has a recess on its rear wall that curves toward the front lamp chamber side, and a convex end face with an arc shape that protrudes toward the rear from at least a portion of the edge of the recess, forming a part of the wall surface of the lamp body.

18. The vehicle lighting fixture according to claim 17, wherein the recess has a plurality of beams with end faces shaped like arcs that extend vertically inside the recess, and girders with end faces shaped like arcs that extend horizontally and connect to the beams at both ends, and the beams and girders are formed to constitute a part of the wall surface of the lamp body.

19. The vehicle lighting fixture according to claim 18, wherein the vertical wall portion constitutes a part of the beam or the girder.

Images