JP2020166936A - Vehicle lamp fitting - Google Patents

Abstract

To provide a vehicle lamp fitting which enables a light distribution pattern to be formed properly while using a lens member that enables formation of the light distribution pattern.SOLUTION: A vehicle lamp fitting 10 includes: a light source 32; a heat radiation member 11 which is provided with the light source 32 and radiates heat from the light source 32; and a lens member 14 having a leans body 52 which guides light from the light source 32 to the inner side to form a light distribution pattern. The lens member 14 is fixed to the heat radiation member 11 with the frame member 13 disposed therebetween. The frame body 13 has a cylindrical part 42 which encloses the lens body 52.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vehicle lamp.

A vehicle lamp is known to use a lens member as a composite optical lens capable of forming a light distribution pattern (see, for example, Patent Document 1 and the like).

In this vehicle lamp, a light distribution pattern can be formed by integrally molding an incident surface, an exit surface, and a shade portion to form a lens member. This vehicle lighting fixture can reduce the number of parts and can be made appropriate without positioning the positional relationship between the entrance surface, the exit surface, and the shade portion, and can appropriately form a light distribution pattern while facilitating installation work. it can.

French Patent Publication No. 3010772

By the way, from the viewpoint of appropriately forming a light distribution pattern, the above-mentioned vehicle lamp is required to be in a state in which light guided inward of the lens member can be prevented from leaking in an unintended direction. Further, the above-mentioned vehicle lamp is required to be provided with a lens member so that the optical positional relationship with respect to the light source is appropriate.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle lamp capable of appropriately forming a light distribution pattern while using a lens member capable of forming a light distribution pattern. And.

The vehicle lamp of the present invention includes a light source, a heat radiating member provided with the light source and dissipating heat from the light source, and a lens body that guides the light from the light source inward to form a light distribution pattern. A lens member is provided, and the lens member is fixed to the heat radiating member with a frame member interposed therebetween, and the frame member has a tubular tubular portion that surrounds the lens body.

According to the vehicle lamp of the present invention, the light distribution pattern can be appropriately formed while using the lens member capable of forming the light distribution pattern.

It is explanatory drawing which shows the vehicle lamp of Example 1 of the vehicle lamp which concerns on this invention. It is explanatory drawing which shows the structure of the lamp for vehicle by disassembling. It is sectional drawing of the lens body of the lens member obtained along the line II-II of FIG. FIG. 5 is a cross-sectional view of a vehicle lamp obtained along the line II of FIG. It is explanatory drawing which shows the lamp for vehicle of Example 2. It is explanatory drawing which shows the structure of the vehicle lamp of Example 2 by disassembling.

Hereinafter, each embodiment of the vehicle lamp 10 as an example of the vehicle lamp according to the present invention will be described with reference to the drawings. In FIG. 3, the lens flange portion 51 is omitted in order to facilitate understanding of the configuration of the lens body 52.

The vehicle lamp 10 of the first embodiment according to the embodiment of the vehicle lamp according to the present invention will be described with reference to FIGS. 1 to 4. The vehicle lighting tool 10 of the first embodiment is used as a lighting tool for a vehicle such as an automobile, and is used for, for example, a head lamp, a fog lamp, or the like. The vehicle lighting equipment 10 is arranged on both the left and right sides of the front part of the vehicle, and is formed in a lamp chamber formed by covering the open front end of the lamp housing with an outer lens, and has an optical axis adjustment mechanism for the vertical direction and light for the horizontal direction. It is provided via a shaft adjustment mechanism. In the following description, in the vehicle lighting tool 10, the traveling direction when the vehicle is traveling straight and the direction of irradiating light is the optical axis direction (Z in the drawing), and the vertical direction when mounted on the vehicle is defined as the optical axis direction. The vertical direction (Y in the drawing) is used, and the width direction (X in the drawing) is the direction orthogonal to the optical axis direction and the vertical direction.

As shown in FIGS. 1 and 2, the vehicle lamp 10 includes a heat radiating member 11, a light source unit 12, a frame member 13, and a lens member 14.

The heat radiating member 11 is a heat sink member that releases (radiates) heat generated by the light source unit 12 to the outside, is formed of a metal material or a resin material having high thermal conductivity, and in Example 1, aluminum among metal die castings. It is formed by die casting. The heat radiating member 11 has a base portion 21, a plurality of heat radiating fins 22, and a pair of mounting arm portions 23.

The base portion 21 has a flat plate shape orthogonal to the optical axis direction, and a light source mounting portion 24 is provided in the center. The light source mounting location 24 defines a location where the light source portion 12 is mounted, and as shown in FIG. 2, it has a flat surface and is provided with a pair of screw holes 25 and a pair of positioning protrusions 26. There is. The pair of screw holes 25 are provided at the end portions in the vertical direction of the light source mounting portion 24, and can be fixed by screwing the screws 15. The pair of positioning protrusions 26 are provided at the lower end in the vertical direction at the light source mounting portion 24 in the width direction so as to sandwich the screw hole 25, and are projected to the front side in the optical axis direction. ing.

Each radiating fin 22 has a plate shape orthogonal to the width direction on the rear side of the base portion 21 (the rear side in the optical axis direction (the side opposite to the direction in which light is irradiated)). The heat radiation fins 22 are provided side by side (in parallel) at predetermined intervals in the width direction.

The pair of mounting arm portions 23 are provided in pairs on both outer sides in the width direction of the light source mounting portion 24, and project from the base portion 21 to the front side in the optical axis direction. Both attachment arm portions 23 have a plane in which the front end portion 27 in the optical axis direction is orthogonal to the optical axis direction, and the end portions 27 thereof are positioned at equal positions (on the same plane) in the optical axis direction. Has been done. Each end 27 is provided with a positioning protrusion 28 and a screw hole 29. The positioning protrusion 28 is provided on the upper portion of the end portion 27 in the vertical direction, and projects forward on the optical axis direction. The screw hole 29 is provided at the lower portion of the end portion 27 in the vertical direction, and the lens member 14 and the frame member 13 can be fixed by screwing the screw 16.

The light source unit 12 has a heat transfer member 31 and a light source 32 arranged on the heat transfer member 31. The heat transfer member 31 is formed of a metal material or a resin material having a high thermal conductivity in a plate shape, and is formed of aluminum in the first embodiment. The heat transfer member 31 quickly diffuses the heat generated by the light source 32 over a wide range, and efficiently transfers the heat to the heat dissipation member 11 (the light source mounting portion 24). The heat transfer member 31 can be addressed to the light source mounting portion 24 of the base portion 21 of the heat dissipation member 11. The heat transfer member 31 is provided with a light source positioning hole 33 and a light source screw through hole 34. The light source positioning holes 33 are provided in pairs corresponding to the pair of positioning protrusions 26 of the light source mounting location 24, and the positioning projections 26 are fitted in a state where the heat transfer member 31 is addressed to the light source mounting location 24. It is possible. The light source screw through holes 34 are provided in pairs corresponding to the pair of screw holes 25 of the light source mounting location 24, and the heat transfer member 31 is twisted into the screw holes 25 in a state of being addressed to the light source mounting location 24. It is possible to pass the screw 15 to be inserted.

The light source 32 is configured with a substrate 35 provided with a light emitting chip attached to a heat transfer member 31 with an adhesive or the like. The substrate 35 is provided with a light emitting region 36 that shines by passing light emitted from the light emitting chip. The light emitting chip is arranged on the back side of the substrate 35 and serves as an LD light source (laser light source) using an LD chip (laser diode chip), and emits light from a plane light emitting portion with a Lambersian distribution or a distribution close to this. Although the light emitting chip is an LD light source in the first embodiment, it may be an LED light source (light emitting diode light source) using the LED chip, and is not limited to the configuration of the first embodiment. Here, the light emitting chip of the light source 32 is easier to miniaturize when the LD light source is used than when the LED light source is used. Therefore, the LD light source is used in the first embodiment. The light source unit 12 is appropriately lit by supplying electric power to the light source 32 by connecting an external connector via the connector connection unit.

The frame member 13 is provided between the heat radiating member 11 and the lens member 14 in order to suppress (heat insulation) the heat of the heat radiating member 11 from being conducted to the lens member 14. The frame member 13 is formed of a material having heat insulating properties, at least a material having lower heat transfer property than the heat radiating member 11, and more preferably formed of a member having higher heat resistance (higher heat resistant temperature) than the lens member 14. Will be done. Further, the frame member 13 is made of an opaque material that does not transmit light. In the first embodiment, the frame member 13 is made of polycarbonate (PC).

The frame member 13 has a frame flange portion 41 and a tubular portion 42. The frame flange portion 41 has a flat plate shape that is long in the width direction while being orthogonal to the optical axis direction, and it is possible to hang the end portions 27 of both mounting arm portions 23 of the heat radiating member 11. The frame flange portion 41 is provided with a frame positioning hole 43 and a frame screw through hole 44. The frame positioning hole 43 is capable of fitting the positioning protrusion 28 in a state where the frame flange portion 41 is addressed to the end portion 27. The frame screw through hole 44 is capable of passing a screw 16 screwed into the screw hole 29 in a state where the frame flange portion 41 is addressed to the end portion 27.

The tubular portion 42 is continuously provided on the rear side of the frame flange portion 41 in the optical axis direction, and has a cylindrical shape having an axis extending in the optical axis direction. The tubular portion 42 is capable of accommodating the lens body 52 of the lens member 14 (see FIG. 4 and the like).

The lens member 14 forms a light distribution pattern with light from the light source unit 12 (the light source 32 thereof), and is formed of a transparent resin (for example, an acrylic resin or a polycarbonate resin). The lens member 14 has a lens flange portion 51 and a lens body 52.

The lens flange portion 51 projects in the vicinity of the front end (emission surface 56) of the lens body 52 in the shape of a long flat plate in the width direction while being orthogonal to the optical axis direction. The lens flange portion 51 is capable of addressing the rear side surface 51a on the rear side in the optical axis direction to the front side surface 41a of the frame flange portion 41 of the frame member 13. The lens flange portion 51 is provided with a lens positioning hole 53 and a lens screw through hole 54. The lens positioning hole 53 allows the positioning projection 28 to pass through the lens flange portion 51 in a state where the lens flange portion 51 is addressed to the frame flange portion 41. The lens screw through hole 54 allows the screw 16 screwed into the screw hole 29 to pass through while the lens flange portion 51 is addressed to the frame flange portion 41.

The lens body 52 is a composite optical lens that guides the light from the light source unit 12 (light source 32) inward to form a light distribution pattern. As shown in FIG. 3, the lens body 52 is elongated in the optical axis direction, is provided with an incident surface 55 on the rear side in the optical axis direction, and is provided with an exit surface 56 on the front side in the optical axis direction. A shade portion 57 is provided between the entrance surface 55 and the exit surface 56. The incident surface 55 is a portion where the light from the light source 32 is incident, and the exit surface 56 is a portion where the light incident on the lens body 52 from the incident surface 55 is emitted to the front side.

The incident surface 55 has a concave shape in which the entire shape is recessed inside the lens body 52 (front side in the optical axis direction), a convex surface 55a is provided in the center, and the periphery of the convex surface 55a is a concave surface 55b. The focal point of the incident surface 55 on the rear side in the optical axis direction of the concave surface 55b is substantially aligned with the light emitting center of the light source 32, and the light emitted from the light source 32 is efficiently lensed with a Lambersian distribution or a distribution close to this. It can be incident inside the main body 52.

The convex surface 55a projects outward (rear side in the optical axis direction) of the lens body 52 while having a substantially rectangular outer shape when viewed in the optical axis direction, and has a refractive power only in the vertical direction while extending in the width direction. A cylindrical lens (which is a convex lens with a cross section orthogonal to the width direction) is formed by being curved. The convex surface 55a is set so that the focal point on the front side in the optical axis direction is located at or near the top line 57a of the shade portion 57, and the light is focused in the vertical direction and spread (diffused) in the horizontal direction. .. The convex surface 55a is a portion where the light L1 forming the medium diffusion light distribution pattern in the low beam light distribution pattern is incident.

The exit surface 56 is a surface that emits light from the light source unit 12 (light source 32) incident from the incident surface 55 (including the convex surface 55a) from the lens body 52, and is a convex surface that projects forward in the optical axis direction. Has been done. Since the lens flange portion 51 is provided near the front end (emission surface 56) of the lens main body 52, the exit surface 56 projects from the front side surface 51b of the lens flange portion 51. Here, since the lens member 14 integrally forms the lens flange portion 51 and the lens body 52 with a transparent resin, the light passing through the lens body 52 is not emitted from the emission surface 56 but from the front side surface of the lens flange portion 51. There is a risk of exiting from 51b. For this reason, the lens member 14 may reflect light by adhering a reflective member such as aluminum or silver to a portion of the front side surface 51b of the lens flange portion 51 other than the exit surface 56 by vapor deposition or painting. Often, a light-shielding member may be adhered to prevent light transmission.

The shade portion 57 is formed in the lens body 52 by recessing the incident surface 55 and the exit surface 56 in a substantially triangular shape with the lower side in the vertical direction facing upward in the vertical direction. The apex of the triangular recess of the shade portion 57 has a top line 57a that matches the shape of the cut-off line.

The lens body 52 is provided with a first reflector surface 58, a second reflector surface 59, a third reflector surface 61, and a fourth reflector surface 62. In the first embodiment, each of the reflector surfaces (58, 59, 61, 62) reflects light by utilizing total reflection. The reflector surfaces (58, 59, 61, 62) may reflect light by adhering aluminum, silver, or the like to the lens body 52 by vapor deposition, painting, or the like.

The first reflector surface 58 is provided on the lens body 52 on the rear side in the optical axis direction and on the upper side in the vertical direction with respect to the top line 57a of the shade portion 57. The first reflector surface 58 has a semi-dome shape with a free curved surface, and the focal point on the rear side in the optical axis direction substantially coincides with the light emitting center (light emitting region 36) of the light source 32. The first reflector surface 58 forms a diffuse light distribution pattern in the low beam light distribution pattern by reflecting the light L2 incident from the incident surface 55 toward the exit surface 56.

The second reflector surface 59 is provided on the lens body 52 on the rear side in the optical axis direction and on the lower side in the vertical direction with respect to the top line 57a of the shade portion 57, and has a semi-dome shape of a free curved surface. The second reflector surface 59 forms a focused light distribution pattern in the low beam light distribution pattern by reflecting the light L3 incident from the incident surface 55 toward the exit surface 56. Here, in the lens body 52, the size of the first reflector surface 58 in the width direction is made larger than that of the second reflector surface 59, so that the diffused light distribution pattern by the above-mentioned light L2 can be appropriately formed. ..

The third reflector surface 61 is provided on the lens main body 52 on the front side in the optical axis direction of the first reflector surface 58 on the upper side in the vertical direction. The third reflector surface 61 is set so that the light L4 incident from the incident surface 55 is reflected toward at least a part of the fourth reflector surface 62.

The fourth reflector surface 62 is provided on the lens main body 52 on an inclined surface on the front side in the optical axis direction in a triangular recess for the shade portion 57. The fourth reflector surface 62 is set so that the light L4 reflected by the third reflector surface 61 is irradiated from the exit surface 56 as an overhead light distribution pattern.

Here, in the lens main body 52, a triangular recess is provided for the shade portion 57, so that a rear inclined surface 63 which is an inclined surface on the rear side in the optical axis direction is formed. The rear inclined surface 63 allows a part of the light incident from the incident surface 55 to be taken from the front surface in the optical axis direction of the upper third reflector surface 61 in the vertical direction of the lens body 52 (hereinafter referred to as the front side surface 64). There is a risk of reflection toward. Since this light is reflected by the front side surface 64, it may be emitted from the exit surface 56 to the front side and become harmful light emitted to the lighting chamber or the vicinity of the vehicle. Therefore, light scattering portions such as fine irregularities (for example, prisms) may be formed on the rear inclined surface 63 and the front side surface 64 so as to scatter light. As a result, the amount of light reflected by the rear inclined surface 63 and the front side surface 64 can be significantly reduced as compared with the case where the light scattering portion is not provided, and the harmful light can be significantly suppressed. be able to.

The vehicle lamp 10 is assembled as follows with reference to FIG. First, a pair of positioning protrusions 26 of the light source mounting portion 24 of the base portion 21 of the heat radiating member 11 are passed through the light source positioning hole 33 of the heat transfer member 31 of the light source unit 12, and the heat transfer member 31 is passed through the light source mounting portion 24. Is addressed. Then, the two screws 15 are screwed into the pair of screw holes 25 of the light source mounting location 24 through the light source screw through hole 34 of the heat transfer member 31, so that the light source unit 12 (light source 32) is positioned at the light source mounting location 24. It is fixed in the state of being fixed.

After that, with the frame member 13 and the lens member 14 accommodating the lens body 52 in the tubular portion 42 and the lens flange portion 51 being addressed to the frame flange portion 41, both attachment arm portions 23 of the heat dissipation member 11 It is addressed to both ends 27 so as to hang over the ends 27. At this time, the positioning protrusions 28 of each end portion 27 are passed through the frame positioning hole 43 of the frame flange portion 41 and the lens positioning hole 53 of the lens flange portion 51. As a result, the lens member 14 (the lens body 52) is positioned with respect to the heat radiating member 11, that is, the light source unit 12 (light source 32) fixed therein. In this state, the frame member 13 and the lens member 14 have a screw 16 through which the lens screw through hole 54 of the lens flange portion 51 and the frame screw through hole 44 of the frame flange portion 41 are passed through, and the screw hole 29 of each end portion 27. By being screwed into, it is fixed to the heat radiating member 11. The frame member 13 may be attached to the heat radiating member 11 (both attachment arms 23 thereof), and then the lens member 14 may be attached to the frame member 13 to be attached to the heat radiating member 11. Not limited.

As a result, as shown in FIG. 1, the vehicle lamp 10 has the light source unit 12, the frame member 13, and the lens member 14 attached to the heat radiating member 11. The vehicle lamp 10 is provided in the lamp chamber, and an external connector is connected to the light source 12 via the connector connection. The vehicle lighting fixture 10 can appropriately turn on and off the light source 32 by supplying electric power to the light source unit 12 (light source 32) from the lighting control circuit via the external connector and the connector connection portion.

When the light source 32 is turned on, the vehicle lighting tool 10 has a diffused light distribution pattern formed by light L2, a condensed light distribution pattern formed by light L3, a medium diffused light distribution pattern formed by light L1, and light. The overhead light distribution pattern formed in L4 and the overhead light distribution pattern are partially overlapped and irradiated to form a low beam light distribution pattern (see FIG. 3). In the low beam light distribution pattern, the lens body 52 (light passing through the lens body 52) forms the largest region in the diffuse light distribution pattern, and the central brightest region is formed in the focused light distribution pattern. Further, in the low beam light distribution pattern, the second brightest region covering the focused light distribution pattern is formed in the diffused light distribution pattern by the medium diffusion light distribution pattern, and the upper region of the above three regions is formed by the overhead light distribution pattern. Is formed. The low beam light distribution pattern can alleviate the spectral color by superimposing the spectrum of the condensed light distribution pattern with a slight yellow tint and the bluish spectroscopic pattern of the diffused light distribution pattern near the upper end of the cut-off line. It has become. Therefore, the vehicle lighting tool 10 can allow the light emitted from the light source unit 12 (light source 32) to travel to the outside of the lighting chamber through the outer lens, and can function as a head lamp, a fog lamp, or the like. .. Since the vehicle lighting fixture 10 forms a low beam light distribution pattern with one lens body 52, it is possible to reduce the size and cost by reducing the number of parts as compared with the vehicle lighting fixture using a shade or a reflector. It is possible to obtain a low beam light distribution pattern with a good light intensity distribution. If the lens body 52 is a composite optical lens in which at least a part of a plurality of light distribution patterns are overlapped to form a low beam light distribution pattern, the number, shape, and position of the light distribution patterns may be appropriately set. It is not limited to the configuration of Example 1.

Next, the operation of the vehicle lamp 10 will be described with reference to FIG. In the vehicle lighting fixture 10, the lens member 14 is positioned and fixed to the heat radiating member 11, so that the position of the lens body 52 of the lens member 14 with respect to the light source 32 of the light source unit 12 is optically appropriate. As a result, the vehicle lamp 10 can appropriately form the low beam light distribution pattern having the above-mentioned good luminous intensity distribution.

Here, in the vehicle lamp 10, when the light source 32 is turned on as described above, the heat generated there is transferred to the heat radiating member 11 via the heat transfer member 31, and is mainly radiated by the heat radiating fins 22 thereof. .. At this time, the heat is transferred to the heat transfer member 31, so that the overall temperature rises. Then, since the lens member 14 is fixed to the heat radiating member 11 of the vehicle lamp 10, the heat of the heat radiating member 11 is transferred to the lens member 14 (see arrow H), and the lens member 14 is deformed. There is a risk. This is because, in particular, when the lens member 14 is formed of a transparent resin as in Example 1, the heat-resistant temperature is lower than that of the lens member formed of a glass material, so that the lens member 14 is deformed. There is a high risk of doing so.

Therefore, in the vehicle lamp 10, the frame member 13 is insulated by interposing a frame member 13 formed of a member having a thermal conductivity lower than that of the lens member 14 between the heat radiating member 11 and the lens member 14. It is functioning as. Therefore, in the vehicle lamp 10, the heat of the heat radiating member 11 is mainly transferred by heat conduction, so that even if the heat radiating member 11 becomes hot due to the heat generated by the light source 32 of the light source unit 12, the heat radiating member 11 is heated. It is possible to significantly suppress the transfer of heat to the lens member 14. As a result, the vehicle lamp 10 can prevent the lens member 14 from being deformed due to the heat transferred from the heat radiating member 11, can prevent the lens member 14 from deteriorating the positioning accuracy, and cause poor light distribution. It can be prevented from occurring.

Further, in the vehicle lamp 10, the lens body 52 of the lens member 14 is housed in the tubular portion 42 provided in the frame member 13. Here, in the vehicle lamp 10, the lens body 52 is optically designed as described above, but the light emitted from the light source 32 travels in an unintended direction, so that the lens body 52 surrounds the outer peripheral surface of the lens body 52. There is a risk of leaking into. Therefore, since the vehicle lamp 10 has a tubular portion 42 that does not transmit light and surrounds the direction orthogonal to the optical axis direction of the lens body 52, it is possible to prevent unintended light from leaking from the lens body 52 ( See arrow L5). Therefore, the vehicle lamp 10 has a function of effectively suppressing the heat from the heat radiating member 11 from being transferred to the lens member 14 to the frame member 13, and light (direct light and the lens body) that is unnecessary for light distribution. It is possible to have a function of preventing dazzling caused by (uncontrolled light) leaking to the outside of the lamp from other than the exit surface 56 of the 52.

Further, the vehicle lamp 10 is a frame member at each end 27 of a pair of mounting arms 23 projecting forward in the optical axis direction from the base 21 provided with the light source mounting portion 24 in the heat radiating member 11. The lens member 14 is addressed via 13. Therefore, the vehicle lamp 10 can release heat to the periphery of both mounting arms 23 at both mounting arms 23, which is a path for heat to be transferred from the heat radiating member 11 to the frame member 13 and the lens member 14. Therefore, the heat dissipation property of the heat dissipation member 11 can be improved. That is, the vehicle lamp 10 can also be used as a place where both mounting arm portions 23 positively dissipate heat. In addition, since the lens flange portion 51 is fixed to each end portion 27 of both mounting arm portions 23 with the frame flange portion 41 interposed therebetween, the vehicle lamp 10 has heat from the heat radiating member 11 to the lens body 52. The frame flange portion 41, which can be a path through which heat is transmitted, can also release heat to the periphery. As a result, the vehicle lamp 10 can more effectively suppress the heat from the heat radiating member 11 being transferred to the lens member 14.

In the vehicle lamp 10, the frame member 13 is formed of a member having a lower thermal conductivity than the heat radiating member 11 and a higher heat resistance than the lens member 14. As a result, it is possible to prevent the lens member 14 from being deformed by the influence of heat. Therefore, the vehicle lamp 10 can more reliably prevent the mounting accuracy of the lens member 14 attached to the heat radiating member 11 via the frame member 13 from being lowered.

In the vehicle lamp 10, the frame flange portion 41 and the tubular portion 42 are integrally formed of a material having low heat transfer property in the frame member 13, and the tubular portion 42 surrounds the lens body 52. It is possible to suppress heat transfer from the pair of mounting arms 23 and the like to the lens body 52 due to radiation and convection.

The vehicle lamp 10 of the first embodiment can obtain the following effects.

The vehicle lamp 10 includes a heat radiating member 11 provided with a light source 32, and a lens member 14 having a lens body 52 that guides light from the light source 32 inward to form a light distribution pattern. The vehicle lamp 10 has a lens member 14 fixed to the heat radiating member 11 with a frame member 13 interposed therebetween, and the frame member 13 is provided with a tubular tubular portion 42 surrounding the lens body 52. Therefore, the vehicle lamp 10 can effectively suppress the heat from the heat radiating member 11 from being transferred to the lens member 14 by the frame member 13, and can prevent unintended light from leaking from the lens member 14. Therefore, the vehicle lamp 10 can appropriately form the light distribution pattern by a simple mounting operation by using the lens member 14 that can form the light distribution pattern by itself.

In the vehicle lamp 10, the heat radiating member 11 has a base portion 21 provided with the light source 32 and a mounting arm portion 23 protruding from the base portion 21, and the lens member 14 and the frame member 13 include the mounting arm portion 23. It is attached to the end portion 27 of the. Therefore, in the vehicle lamp 10, the heat from the heat radiating member 11 can be released by the mounting arm portion 23, so that the heat transferred to the lens member 14 and the frame member 13 via the mounting arm portion 23 can be reduced. , It is possible to more effectively suppress the transfer of heat from the heat radiating member 11 to the lens member 14.

In the vehicle lamp 10, the lens member 14 has a plate-shaped lens flange portion 51 extending in the vicinity of the exit surface 56 of the lens body 52 in a direction orthogonal to the optical axis of the lens body 52, and the frame member 13 is a lens. It has a frame flange portion 41 that is parallel to the flange portion 51. Then, in the vehicle lamp 10, the lens flange portion 51 is fixed to the end portion 27 with the frame flange portion 41 interposed therebetween. Therefore, in the vehicle lamp 10, heat can be released to the periphery even at the frame flange portion 41 which can be a path for heat transfer from the heat radiating member 11 to the lens body 52, and the heat from the heat radiating member 11 can be more effectively released. It is possible to suppress transmission to the lens member 14.

In the vehicle lamp 10, the end 27 has a positioning protrusion 28, the lens flange 51 has a lens positioning hole 53 into which the positioning protrusion 28 is fitted, and the frame flange 41 has a frame into which the positioning protrusion 28 is fitted. It has a positioning hole 43. Then, the vehicle lamp 10 positions the lens member 14 with respect to the heat radiating member 11 by fitting the positioning protrusion 28 into the lens positioning hole 53 through the frame positioning hole 43. Therefore, the vehicle lamp 10 can easily position the lens member 14 with respect to the light source 32 provided on the heat radiating member 11, and positions the contact points between the lens member 14 and the heat radiating member 11 with the positioning projection 28 and the lens positioning. It can be made only in the hole 53. As a result, even if the vehicle lighting fixture 10 is properly positioned by the lens positioning hole 53 and the positioning protrusion 28, the heat path from the heat radiating member 11 to the lens member 14 can be made extremely small, and the heat is effectively transferred. Can be suppressed.

Therefore, the vehicle lamp 10 of the first embodiment as the vehicle lamp according to the present disclosure can appropriately form the light distribution pattern while using the lens member 14 that enables the formation of the light distribution pattern.

Next, the vehicle lamp 10A of the second embodiment, which is one embodiment of the present disclosure, will be described with reference to FIGS. 5 and 6. The vehicle lamp 10A is a modification of the configuration of the frame member 13 and the lens member 14 of the vehicle lamp 10 of the first embodiment. Since the vehicle lighting fixture 10A has the same basic concept and configuration as the vehicle lighting fixture 10 of the first embodiment, the same reference numerals are given to the parts having the same configuration, and detailed description thereof will be omitted.

In the vehicle lamp 10A of the second embodiment, a pair of shielding walls 45 are provided on the frame flange portion 41A of the frame member 13A. The shielding walls 45 are provided on the front side surface 41a of the frame flange portion 41A in pairs on both sides of the tubular portion 42 (the end portion on the front side thereof) in the width direction, and are curved so as to surround the tubular portion 42. However, it protrudes to the front side in the optical axis direction. Since the shielding wall 45 is integrally formed with the frame member 13A, it is opaque so that light does not pass through it.

Further, the vehicle lamp 10A is provided with a pair of shielding wall holes 65 in the lens flange portion 51A of the lens member 14A. The shielding wall holes 65 are provided in the lens flange portion 51A in pairs on both sides in the width direction of the emitting surface 56, and are curved so as to surround the emitting surface 56 and penetrate in the optical axis direction to shield the lens flange portion 51A. It is possible to pass through the wall 45.

Next, the assembly and operation of the vehicle lamp 10A will be described. When the lens flange portion 51A is addressed to the frame flange portion 41A, the vehicle lighting fixture 10A inserts a pair of shielding walls 45 into the corresponding shielding wall holes 65. Other assembly is the same as that of the vehicle lamp 10 of the first embodiment. Since the vehicle lamp 10A is provided with shielding walls 45 on both sides of the exit surface 56 in the width direction, the light passing through the lens body 52 in the lens member 14A is significantly prevented from traveling to the lens flange portion 51A. Can be suppressed. Therefore, the vehicle lamp 10A can significantly suppress light leakage from the front side surface 51b excluding the exit surface 56 without providing a reflection member or a light-shielding member on the front side surface 51b of the lens flange portion 51A.

The vehicle lamp 10A of the second embodiment can obtain the following effects. Since the vehicle lamp 10A basically has the same configuration as the vehicle lamp 10 of the first embodiment, the same effect as that of the first embodiment can be obtained.

In addition, the vehicle lamp 10A is provided with a shielding wall 45 that projects toward the lens flange portion 51 while surrounding the exit surface 56 on the frame flange portion 41 of the frame member 13A, and shields the lens flange portion 51A of the lens member 14A. A shielding wall hole 65 is provided to allow the wall 45 to pass through. Therefore, as compared with the vehicle lamp 10 of the first embodiment, the vehicle lamp 10A can significantly suppress light leakage from the front side surface 51b of the lens flange portion 51A while performing the same assembly process.

Therefore, the vehicle lamp 10A of the second embodiment as the vehicle lamp according to the present disclosure can appropriately form the light distribution pattern while using the lens member 14A that enables the formation of the light distribution pattern.

In the second embodiment, the shielding walls 45 (also the shielding wall holes 65 corresponding to the shielding walls 45) are provided in pairs in the width direction. However, the shielding wall 45 is provided so as to project from the frame flange portion 41A and is arranged through the shielding wall hole 65 of the lens flange portion 51A so that the light passing through the lens body 52 travels to the lens flange portion 51A. The shape, number, and position may be appropriately set as long as they are suppressed, and are not limited to the configuration of the second embodiment.

Although the vehicle lamps of the present disclosure have been described based on each embodiment, the specific configuration is not limited to each embodiment and deviates from the gist of the invention according to each claim within the scope of claims. Unless otherwise, design changes and additions are allowed.

In each embodiment, the frame member (13, etc.) has the above-mentioned shape. However, if the frame member is provided between the lens member 14 and the heat radiating member 11 and has a tubular tubular portion 42 surrounding the lens body 52, the shape may be appropriately set, and each embodiment may be used. It is not limited to the configuration of. The tubular portion 42 is divided in the circumferential direction centered on the optical axis direction as long as it surrounds the lens body 52 in a direction orthogonal to the optical axis direction to prevent unintended light leakage. It may be formed or may have other configurations, and is not limited to the configuration of Example 1.

Further, in each embodiment, the lens member (14, etc.) has the above-mentioned shape. However, if the lens member has a lens body 52 that guides the light from the light source unit 12 (light source 32) inward to form a light distribution pattern, the shape may be appropriately set, and the shape of each lens member may be appropriately set. It is not limited to the configuration.

Further, in each embodiment, an example in which the lens body 52 forms a low beam light distribution pattern is described. However, if the lens body is for forming a light distribution pattern by guiding the light from the light source unit 12 (light source 32) inward, the lens body is a composite optical lens that forms a high beam light distribution pattern without the shade unit 57. There may be other configurations, and the configuration is not limited to the configuration of each embodiment.

In each embodiment, the end portion 27 fits the positioning protrusion 28 into the lens flange portion 51 through the frame positioning hole 43 of the frame flange portion 41 to fix the lens member 14 in a state of being positioned with respect to the heat radiating member 11. There is. However, in this positioning configuration, if the lens member 14 is positioned with respect to the heat radiating member 11, for example, the end portion 27 and the frame flange portion 41 can be positioned, and the frame flange portion 41 and the lens flange portion 51 thereof can be positioned. And may be positioned, other configurations may be used, and the configuration is not limited to the configuration of each embodiment.

10, 10A Vehicle lighting 11 Heat dissipation member 13, 13A Frame member 14, 14A Lens member 21 Base 23 Mounting arm 27 End 28 Positioning protrusion 32 Light source 41, 41A Frame flange 42 Cylindrical 43 Frame positioning hole 45 Shielding Wall 51, 51A Lens flange 52 Lens body 53 Lens positioning hole 56 Exit surface 65 Shielding wall hole

Claims (5)

Light source and
A heat radiating member provided with the light source and dissipating heat from the light source,
A lens member having a lens body that guides light from the light source inward to form a light distribution pattern is provided.
The lens member is fixed to the heat radiating member with a frame member interposed therebetween.
The frame member is a vehicle lamp having a tubular tubular portion that surrounds the lens body. The heat radiating member has a base portion provided with the light source and a mounting arm portion protruding from the base portion.
The vehicle lamp according to claim 1, wherein the lens member and the frame member are attached to an end portion of the attachment arm portion. The lens member has a plate-shaped lens flange portion extending in a direction orthogonal to the optical axis of the lens body in the vicinity of the exit surface of the lens body.
The frame member has a frame flange portion parallel to the lens flange portion, and has a frame flange portion.
The vehicle lamp according to claim 2, wherein the lens flange portion is fixed to the end portion with the frame flange portion interposed therebetween. The end has a positioning protrusion and
The lens flange portion has a lens positioning hole into which the positioning protrusion is fitted.
The frame flange portion has a frame positioning hole into which the positioning protrusion is fitted.
The vehicle lamp according to claim 3, wherein the positioning protrusion is fitted into the lens positioning hole through the frame positioning hole to position the lens member with respect to the heat radiating member. The frame flange portion is provided with a shielding wall that surrounds the exit surface and projects toward the lens flange portion.
The vehicle lamp according to claim 3 or 4, wherein the lens flange portion is provided with a shielding wall hole that allows the shielding wall to pass through.