JP2019207774A - Vehicular lighting fixture - Google Patents

Abstract

To allow a light distribution pattern for a low beam to be properly formed irrespective of presence/absence of optical axis adjustment, by a simple lighting fixture structure, in a vehicular lighting fixture constituted so as to radiate direct light from a light emitting element frontward of the lighting fixture via a projection lens.SOLUTION: As a constitution of a lighting fixture unit 20, a shade 80 is integrally formed with a lens holder 64, and the lens holder 64 is supported in a manner rotatable around a first rotary shaft axis Ax1 extending in a horizontal direction with respect to a heat sink 36 mounted on a lamp body 12. Thereby, even when optical axis adjustment of the lighting fixture unit 20 is performed, a relative positional relationship between a projection lens 62 and the shade 80 is constant, and a light distribution pattern for a low beam can be formed properly. Also, by performing optical axis adjustment by rotation of the projection lens 62 in a state where a position of the heat sink 36 for supporting a light emitting element 32 via a substrate 34 is fixed, a lighting fixture constitution can be simplified.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicular lamp configured to irradiate direct light from a light emitting element toward the front of the lamp through a projection lens.

  2. Description of the Related Art Conventionally, a configuration of a vehicular lamp is known that is configured to irradiate direct light from a light emitting element toward the front of the lamp through a projection lens.

  In “Patent Document 1”, as a configuration of such a vehicle lamp, a projection lens is supported so as to be rotatable around a rotation axis extending in a horizontal direction with respect to a heat sink supporting a substrate on which a light emitting element is mounted. It has been described.

  On the other hand, “Patent Document 2” describes a vehicular lamp including a plurality of lamp units configured to irradiate light from a light emitting element reflected by a reflector toward the front of the lamp through a projection lens. ing. In this vehicular lamp, a plurality of lamp units are supported by a common bracket, and a mechanism for finely adjusting the optical axis between the lamp units is provided on the lamp unit. It has become.

JP 2013-161536 A JP 2005-166590 A

  In the vehicular lamp described in the above “Patent Document 1”, the optical axis can be adjusted in the vertical direction by rotating the projection lens while the position of the heat sink is fixed. Can be simplified.

  If such a vehicular lamp is configured to include a shade that blocks downward direct light from the light emitting element toward the projection lens, a light distribution pattern having a cut-off line such as a low beam light distribution pattern is formed. It becomes possible.

  However, when the shade is supported by a substrate or a heat sink, the relative positional relationship between the projection lens and the shade is changed by adjusting the optical axis, so that the cutoff line is unclear. As a result, the desired light distribution pattern cannot be formed.

  The present invention has been made in view of such circumstances, and is a simple lamp in a vehicle lamp configured to irradiate direct light from a light emitting element toward the front of the lamp via a projection lens. It is an object of the present invention to provide a vehicular lamp that can appropriately form a light distribution pattern having a cut-off line regardless of the presence or absence of optical axis adjustment depending on the configuration.

  In the present invention, the object is achieved by devising the support structure of the shade.

That is, the vehicular lamp according to the present invention is:
In a vehicular lamp configured to irradiate direct light from a light emitting element toward the front of the lamp through a projection lens,
It has a heat sink that supports the substrate on which the light emitting element is mounted,
The heat sink is attached to the opening formed in the lamp body,
Between the light emitting element and the projection lens, a shade for shielding downward direct light from the light emitting element toward the projection lens is disposed,
The shade is formed integrally with a lens holder that supports the projection lens,
The lens holder is supported so as to be rotatable around a rotation axis extending in a required direction with respect to the heat sink.

  As long as the “heat sink” is attached to the opening formed in the lamp body, the specific attachment structure is not particularly limited.

  The “shade” has a structure formed integrally with the lens holder, but as a specific aspect thereof, the structure may be formed integrally with the lens holder, or the lens holder may be screwed. The structure may be fixed by fastening or welding.

  The specific direction of the “required direction” is not particularly limited, and for example, the vertical direction and the horizontal direction can be adopted.

  In the vehicular lamp according to the present invention, the shade is formed integrally with the lens holder. The lens holder can be rotated around a rotation axis extending in a required direction with respect to the heat sink attached to the lamp body. Therefore, the projection lens and the shade can be rotated integrally.

  For this reason, even if the optical axis is adjusted, the relative positional relationship between the projection lens and the shade does not change, and therefore the intended light distribution pattern having a cut-off line can be obtained regardless of whether or not the optical axis is adjusted. Can be formed.

  In addition, since the optical axis can be adjusted by rotating the projection lens while the position of the heat sink supporting the light emitting element is fixed via the substrate, the lamp configuration can be simplified.

  As described above, according to the present invention, in the vehicular lamp configured to irradiate the direct light from the light emitting element toward the front of the lamp through the projection lens, whether or not the optical axis is adjusted by a simple lamp configuration. Therefore, it is possible to appropriately form a light distribution pattern having a cut-off line.

  Moreover, in the vehicular lamp according to the present invention, the heat sink attached to the opening of the lamp body is disposed with at least a part thereof exposed to the space outside the lamp room, so that the heat generation of the light emitting element is prevented. The heat dissipation effect can be enhanced. Accordingly, it is possible to eliminate the need for a cooling fan or the like, thereby reducing the weight of the vehicular lamp and reducing the depth dimension.

  In the above configuration, a first rotation axis extending in the horizontal direction so as to pass through a position near the front end edge of the shade between the light emitting element and the front end edge of the shade is set as the rotation axis of the lens holder. Then, when the lens holder is rotated around the first rotation axis, the amount of direct light directed from the light emitting element toward the projection lens blocked by the shade can be maintained substantially constant. As a result, it is possible to prevent the brightness and luminous intensity distribution of the light distribution pattern from changing greatly due to the adjustment of the optical axis in the vertical direction.

  If the second rotation axis extending in the vertical direction so as to be orthogonal to the first rotation axis is set as the rotation axis of the lens holder, the lens holder is moved to the second rotation axis. By rotating around, the optical axis adjustment in the left-right direction can be performed easily and accurately.

  In the above configuration, if the substrate or the heat sink is configured to support a reflector that reflects a part of the light traveling from the light emitting element to the direction other than the projection lens toward the projection lens, in addition to the direct light from the light emitting element, The reflected light from the reflector can also be used as the forward irradiation light, thereby increasing the brightness of the light distribution pattern.

  In the above configuration, after the second light emitting element is mounted on the substrate at a position below the light emitting element, the second light emitting element transmits the light emitted from the second light emitting element to the projection lens through the space below the shade. If it is set as the structure arrange | positioned so that it may inject, a 2nd light distribution pattern can be formed in the upper side of the light distribution pattern which has a cut-off line.

  Therefore, the low-beam light distribution pattern can be formed by lighting the light-emitting element, and the high-beam light distribution pattern can be formed by additionally lighting the second light-emitting element.

  In the above configuration, if the second reflector that reflects part of the light traveling from the second light emitting element in the direction other than the projection lens to the projection lens is supported on the substrate or the heat sink, the second light emitting element In addition to the direct light, the reflected light from the second reflector can also be used as the front irradiation light, thereby increasing the brightness of the high beam light distribution pattern.

Side sectional view which shows the vehicle lamp which concerns on one Embodiment of this invention. Plan sectional view showing the vehicle lamp Side sectional view which shows the lamp unit of the said vehicle lamp IV direction arrow view of FIG. The perspective view shown in the state which decomposed | disassembled the movable side unit of the said lamp unit (A) is a figure which shows the light distribution pattern for low beams formed with the irradiation light from the said vehicle lamp, (b) is formed with the irradiation light from the vehicle lamp which concerns on the 1st modification of the said embodiment. Diagram showing light distribution pattern for high beam (A) is principal part sectional side view of the said lamp unit for demonstrating the effect | action of the said embodiment, (b) (c) is a figure similar to (a) which shows a comparative example The same figure as FIG. 3 which shows the 1st modification of the said embodiment. The same figure as FIG. 3 which shows the 2nd modification of the said embodiment. The same figure as FIG. 3 which shows the 3rd modification of the said embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing a vehicular lamp 10 according to an embodiment of the present invention, and FIG. 2 is a plan sectional view thereof. 3 is a side sectional view showing the lamp unit 20 of the vehicular lamp 10, and FIG. 4 is a view taken in the direction of the arrow IV.

  In these drawings, the direction indicated by X is “front” as a lamp (“front” as a vehicle), and the direction indicated by Y is “left” (“left direction” as a vehicle) orthogonal to “front”. However, it is “right direction” in the front view of the lamp, and the direction indicated by Z is “upward direction”. The same applies to other figures.

  As shown in these drawings, the vehicular lamp 10 according to the present embodiment is a low-beam irradiation headlamp provided at the right front end of a vehicle, and is a through body attached to the lamp body 12 and its front end opening. The main part of the lamp unit 20 is accommodated in the lamp chamber formed by the light-transmitting cover 14 having a shape. An extension panel 16 surrounding the lamp unit 20 is disposed in the lamp chamber on the front side of the lamp unit 20.

  The lamp unit 20 is a projector-type lamp unit, and is configured to irradiate direct light from five light emitting elements 32 toward the front of the lamp through the projection lens 62.

  The lamp unit 20 includes a fixed side unit 30 fixed to the lamp body 12 and a movable side unit 60 supported to be rotatable with respect to the fixed side unit 30. The optical axis is adjusted by the rotation of the unit 60.

  FIG. 5 is a perspective view showing the movable side unit 60 in an exploded state.

  As shown in the figure, the projection lens 62 is configured as a part of the movable unit 60.

  The projection lens 62 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and when the movable side unit 60 is at the optical axis adjustment reference position, the optical axis of the lamp extends in the longitudinal direction of the lamp. It is configured to match Ax. The projection lens 62 projects a light source image formed on the rear focal plane, which is a focal plane including the rear focal point F, on the virtual vertical screen in front of the lamp as an inverted image.

  The projection lens 62 is supported by the lens holder 64 on the rear surface of the outer peripheral flange portion 62a. This support is performed by laser welding or the like.

  On the other hand, as shown in FIGS. 1 to 4, the five light emitting elements 32 are configured as a part of the fixed unit 30.

  Each of the five light emitting elements 32 is a white light emitting diode having a rectangular (for example, square) light emitting surface, and is mounted on the substrate 34 in a state of being aligned in the vehicle width direction. At this time, each light emitting element 32 is arranged on the rear side of the lamp with respect to the rear focal point F of the projection lens 62 and on the upper side with respect to the lamp reference axis Ax with the light emitting surface facing the front of the lamp.

  The board | substrate 34 is arrange | positioned so that it may extend along the vertical plane orthogonal to the lamp | ramp reference axis Ax, The connector part 34a is arrange | positioned at the upper end part of the front surface.

  The substrate 34 is supported by a heat sink 36 on the rear surface.

  On the front surface of the substrate 34, a reflector 50 that reflects a part of the direct light directed from the five light emitting elements 32 in directions other than the projection lens 64 toward the projection lens 64 is supported. The reflector 50 is disposed so as to be positioned between the five light emitting elements 32 and the connector portion 34 a, and the reflecting surface 50 a is formed in a concave curved surface so as to surround the five light emitting elements 32.

  The heat sink 36 is attached to an opening 12 a formed in the rear wall portion of the lamp body 12.

  The heat sink 36 includes a main body portion 36A extending along a vertical plane orthogonal to the lamp reference axis Ax, and a plurality of radiating fins 36B protruding from the rear surface of the main body portion 36A toward the rear of the lamp. The heat radiating fin 36B is fixed to the lamp body 12 at the outer peripheral edge of the main body 36A in a state where the heat radiating fin 36B is exposed to the space outside the lamp chamber.

  The movable side unit 60 is supported by the heat sink 36 of the fixed side unit 30 at three positions of the lens holder 64. Hereinafter, the specific support structure will be described.

  As shown in FIGS. 1 to 4, the rear end portion of the pivot pin 42 is fixed to the heat sink 36 at a position on the right side of the projection lens 62 (left side in the front view of the lamp) on the horizontal plane including the lamp reference axis Ax. In addition, the rear end portion of the aiming screw 44 is rotatably supported at a position on the left side of the projection lens 62. In the heat sink 36, the rear end portion of the aiming screw 46 is rotatably supported at a position directly below the pivot pin 42 below the projection lens 62.

  On the other hand, the lens holder 64 includes a front end annular portion 64A that supports the projection lens 62, a right leg portion 64B and a left leg portion 64C that extend from the front end annular portion 64A toward the rear of the lamp, and a vicinity of the rear end of the right leg portion 64B. From the portion near the rear end of the right flange portion 64D and the left leg portion 64C extending in the right direction along the vertical plane orthogonal to the lamp reference axis Ax from the portion to the left direction along the vertical plane orthogonal to the lamp reference axis Ax The left flange portion 64 </ b> E extends toward the left side.

  As shown in FIG. 5, a circular opening 64Da is formed at the upper end portion of the right flange portion 64D and a rectangular opening portion 64Db is formed at the lower end portion thereof. A rectangular opening 64Eb is formed at the upper end.

  As shown in FIGS. 1 to 4, the lens holder 64 is engaged with the spherical step bearing 72 attached to the opening 64 </ b> Da of the right flange portion 64 </ b> D so as to be rotatable in all directions with respect to the front end pivot portion of the pivot pin 42. Further, in the aiming nut 74 that is screwed with the screw portion of the aiming screw 46 at the aiming nut 76 attached to the opening portion 64Db of the right flange portion 64D and that is attached to the opening portion 64Eb of the left flange portion 64E. The threaded portion of the aiming screw 44 is screwed.

  Thereby, the movable side unit 60 is centered on the first rotation axis Ax1 passing through the engagement center position A of the spherical step bearing 72 and the pivot pin 42 and the screwing position of the aiming nut 74 and the aiming screw 44. It pivots in the vertical direction, and pivots in the left-right direction around the second pivot axis Ax2 passing through the engagement center position A and the screwing position of the aiming nut 76 and the aiming screw 46. . At that time, the first rotation axis Ax1 extends in the horizontal direction so as to intersect the lamp reference axis Ax, and the second rotation axis Ax2 extends in the vertical direction.

  In FIG. 1, a state where the movable unit 60 is at the optical axis adjustment reference position is indicated by a solid line, and a state where the movable unit 60 is rotated downward by 4 ° from the reference position is indicated by a broken line. The state rotated 4 ° upward from the position is indicated by a two-dot chain line.

  Between the five light emitting elements 32 and the projection lens 62, a shade 80 is disposed for blocking the direct light directed downward from each light emitting element 32 toward the projection lens 62 to form a cut-off line of the low beam light distribution pattern. Has been.

  The shade 80 is configured as a plate-like member extending in the vehicle width direction with a constant plate thickness and a constant longitudinal width.

  The upper surface of the shade 80 is configured as an upward reflecting surface 80a that reflects a part of the direct light from each light emitting element 32 and then reflects the shielded light upward. The shade 80 causes the light reflected by the upward reflecting surface 80a to enter the projection lens 62, and emits the light as downward light from the projection lens 62.

  The upward reflecting surface 80a of the shade 80 is configured such that the left region located on the left side (right side in the front view of the lamp) with respect to the lamp reference axis Ax is a horizontal plane including the lamp reference axis Ax, and on the right side of the lamp reference axis Ax. The right region located at is formed by a horizontal plane that is one step lower than the left region through a short slope. In the shade 80, the front end edge 80a1 of the upward reflecting surface 80a passes through the rear focal point F of the projection lens 62, and the rear end edge of the upward reflecting surface 80a is near the lower front of the light emitting surface of the light emitting element 32. It is arranged to pass through the position of.

  The shade 80 is formed integrally with the lens holder 64.

  Specifically, the shade 80 is fixed to the lens holder 64 so as to be bridged between the upper surface 64Ba of the right leg portion 64B and the upper surface 64Ca of the left leg portion 64C at the rear end portion of the lens holder 64. This fixing is performed by tightening the screw 82 to the right leg 64B at two positions before and after the right end of the shade 80 and tightening the screw 82 to the left leg 64B at two positions before and after the left end. In order to realize this, screw holes 64Ba1 are formed at two positions in the front and rear of the rear end portion of the upper surface 64Ba of the right leg 64B, and screw holes 64Ca1 are formed at two positions in the front and rear of the upper surface 64Ca of the left leg 64C. In addition, screw insertion holes 80b are formed at two positions on the front and rear sides of the left and right ends of the shade 80, respectively.

  In the lens holder 64, the upper surface 64Ca of the left leg portion 64C is displaced upward from the upper surface 64Ba of the right leg portion 64B as the left region of the shade 80 is formed so as to rise from the right region. doing.

  Standing wall portions 64Bb and 64Cb projecting upward are formed at the rear end portions of the upper surface 64Ba of the right leg portion 64B and the upper surface 64Ca of the left leg portion 64C in the lens holder 64, respectively. When the left and right end portions of the shade 80 are placed on the upper surface 64Ba of the right leg portion 64B and the upper surface 64Ca of the left leg portion 64C of the lens holder 64, the right flange portion 64D and the left flange portion 64E are used in the vehicle width direction. Positioning is performed, and positioning in the front-rear direction of the lamp is performed by the standing wall portions 64Bb and 64Cb. As a result, the shade 80 can be easily screwed to the lens holder 64.

  In the lens holder 64, the first rotation axis Ax1 passes on the lamp reference axis Ax at a position near the front end edge 80a1 between the light emitting surface of the light emitting element 32 and the front end edge 80a1 of the upward reflecting surface 80a of the shade 80. Further, the formation positions of the right flange portion 64D and the left flange portion 64E are set.

  FIG. 6A is a perspective view showing a low-beam light distribution pattern PL formed on a virtual vertical screen disposed at a position 25 m ahead of the vehicle by light emitted from the vehicular lamp 10.

  This low beam light distribution pattern PL is a left light distribution pattern for low beam, and has upper and lower cut-off lines CL1 and CL2 at its upper edge. The cut-off lines CL1 and CL2 extend in the horizontal direction at the left and right steps with the VV line passing through the HV, which is a vanishing point in the front direction of the lamp, in the vertical direction, and are on the right side of the VV line. The opposite lane side portion is formed as a lower cut-off line CL1, and the own lane side portion on the left side of the VV line is formed as an upper cut-off line CL2 that rises from the lower cut-off line CL1 through an inclined portion. Is formed. The cut-off lines CL1 and CL2 are formed as inverted projection images of the front end edge 80a1 of the upward reflecting surface 80a of the shade 80.

  In this low beam distribution pattern PL, the elbow point E, which is the intersection of the lower cut-off line CL1 and the VV line, is located about 0.5 to 0.6 ° below HV.

  The low beam light distribution pattern PL is formed as a combined light distribution pattern in which two light distribution patterns PL1 and PL2 are superimposed.

  The light distribution pattern PL1 is a light distribution pattern formed by direct light from the five light emitting elements 32 (including the reflected light from the upward reflecting surface 80a of the shade 80), and a low beam as a horizontally long and bright light distribution pattern. This constitutes the main area of the light distribution pattern for use PL.

  On the other hand, the light distribution pattern PL2 is a light distribution pattern formed by light from the five light emitting elements 32 reflected by the reflector 50. The light distribution pattern for low beam is a horizontally long light distribution pattern larger than the light distribution pattern PL1. It constitutes a PL diffusion region.

  In the present embodiment, the optical axis of the lamp unit 20 is adjusted by rotating the movable unit 60 with respect to the fixed unit 30, but at this time, the projection lens 62, the shade 80, However, the low-beam light distribution pattern PL is maintained as a light distribution pattern having clear cut-off lines CL1 and CL2 regardless of whether or not the optical axis is adjusted.

  In the present embodiment, since the first rotation axis Ax1 of the movable unit 60 is located closer to the front end edge 80a1 between the light emitting element 32 and the front end edge 80a1 of the upward reflecting surface 80a of the shade 80, It is possible to prevent the brightness and luminous intensity distribution of the low beam light distribution pattern PL from changing greatly by adjusting the optical axis in the vertical direction.

  Hereinafter, this point will be described in detail.

  Fig.7 (a) is principal part sectional drawing of the lamp unit 20, FIG.7 (b), (c) is the same figure which shows the comparative example.

  In FIG. 7A, the position of the shade 80 when the movable unit 60 is at the optical axis adjustment reference position is indicated by a solid line, and the shade 80 is rotated 4 ° downward from the reference position. The position of the shade 80 is indicated by a broken line, and the position of the shade 80 when it is rotated 4 ° upward from the reference position is indicated by a two-dot chain line.

  Also, in FIG. 7A, the optical path when the light emitted from the light emission center of the light emitting element 32 is incident on the positions of the front edge 80a1 and the rear edge of the upward reflecting surface 80a of the shade 80 and reflected upward. Are indicated by a solid line, a broken line, and a two-dot chain line, corresponding to the rotational position in the vertical direction.

  As shown in FIG. 7A, in the present embodiment, when the movable side unit 60 is rotated in the vertical direction, the position of the front edge 80a1 of the upward reflecting surface 80a of the shade 80 (that is, the rear side of the projection lens 62). The position of the focal point F) changes in the vertical direction, but the amount of change is slight, and even if the rotational position in the vertical direction changes, the amount of incident light on the upward reflecting surface 80a of the shade 80 changes greatly. do not do. This is because the first rotation axis Ax1 of the movable unit 60 is located closer to the front end edge 80a1 between the light emitting element 32 and the front end edge 80a1 of the upward reflecting surface 80a of the shade 80.

  On the other hand, FIG. 7B is an optical path diagram when the first rotation axis Ax1 of the movable unit 60 is located at the front end edge 80a1 of the upward reflecting surface 80a of the shade 80.

  In this case, when the movable unit 60 is rotated in the vertical direction, the position of the front edge 80a1 of the upward reflecting surface 80a of the shade 80 is not changed, but the upward reflecting surface of the shade 80 is changed depending on the rotational position. The amount of light incident on 80a changes greatly.

  FIG. 7C is an optical path diagram in a case where the first rotation axis Ax1 of the movable unit 60 is located immediately below the light emitting surface of the light emitting element 32.

  In this case, even if the movable unit 60 is rotated in the vertical direction, the amount of incident light on the upward reflecting surface 80a of the shade 80 does not change so much, but the position of the front edge 80a1 depends on the rotation position. It will change greatly in the vertical direction.

  In the light distribution pattern PL1, in order to keep the brightness near the cutoff lines CL1, CL2 constant, even if the movable side unit 60 rotates in the vertical direction, the front end edge 80a1 of the upward reflecting surface 80a1 of the shade 80 It is preferable to prevent the position from changing as much as possible. Further, in order to maintain the overall brightness of the light distribution pattern PL1, the amount of incident light on the upward reflecting surface 80a of the shade 80 changes as much as possible even when the movable unit 60 rotates in the vertical direction. It is preferable not to do so.

  From the above points, as in the present embodiment, the first rotation axis Ax1 of the movable unit 60 is located closer to the front end edge 80a1 between the light emitting element 32 and the front end edge 80a1 of the upward reflecting surface 80a of the shade 80. The configuration is preferable from the viewpoint of preventing the brightness and light intensity distribution of the light distribution pattern PL1 from being largely changed by adjusting the optical axis in the vertical direction, and thus the brightness and light intensity distribution of the low beam light distribution pattern PL. Is preferable from the viewpoint of preventing a large change from occurring.

  If it is important to maintain the brightness near the cut-off lines CL1 and CL2 as the low beam light distribution pattern PL regardless of the optical axis adjustment in the vertical direction, FIG. As shown, it is most preferable that the first rotation axis Ax1 of the movable unit 60 is located at the front end edge 80a1 of the upward reflecting surface 80a of the shade 80.

  Next, the effect of this embodiment is demonstrated.

  In the vehicular lamp 10 according to the present embodiment, as a configuration of the lamp unit 20 for forming the low beam light distribution pattern PL, the shade 80 is integrally formed with the lens holder 64. Since the lens holder 64 is supported so as to be rotatable about a first rotation axis Ax1 extending in the horizontal direction with respect to the heat sink 36 attached to the lamp body 12, the projection lens 62 and the shade 80 are integrated with each other. It can be rotated.

  For this reason, even if the optical axis of the lamp unit 20 is adjusted, the relative positional relationship between the projection lens 62 and the shade 80 does not change. Therefore, the low beam light distribution pattern PL is set to the presence or absence of the optical axis adjustment. Regardless, it can be formed properly.

  In addition, since the optical axis can be adjusted by rotating the projection lens 62 while the position of the heat sink 36 supporting the light emitting element 32 is fixed via the substrate 34, the configuration of the lamp can be simplified. it can.

  As described above, according to the present embodiment, in the vehicular lamp 10 configured to irradiate the direct light from the light emitting element 32 toward the front of the lamp through the projection lens 62, the optical axis is adjusted by a simple lamp configuration. Regardless of the presence or absence, the low beam light distribution pattern PL can be appropriately formed.

  In addition, in the vehicular lamp 10 according to the present embodiment, the heat sink 36 attached to the opening 12a of the lamp body 12 is disposed in a state in which the plurality of radiating fins 36B are exposed to the space outside the lamp chamber. In addition, the heat dissipation effect for the heat generation of the light emitting element 32 can be enhanced. Therefore, it is possible to eliminate the need for installing a cooling fan or the like, which makes it possible to reduce the weight of the vehicular lamp 10 and reduce the depth dimension.

  In the vehicular lamp 10 according to the present embodiment, the first rotation axis Ax1 of the lens holder 64 is positioned closer to the front end edge 80a1 between the light emitting element 32 and the front end edge 80a1 of the upward reflecting surface 80a of the shade 80. Therefore, the amount of light that is directly reflected from the light emitting element 32 toward the projection lens 62 is blocked by the shade 80 and reflected by the upward reflecting surface 80a is set at the rotation position around the first rotation axis Ax1 of the lens holder 64. Regardless, it can be maintained almost constant. As a result, it is possible to prevent the brightness and luminous intensity distribution of the low-beam light distribution pattern PL from changing greatly due to the vertical optical axis adjustment.

  In addition, in the present embodiment, the lens holder 64 is configured to rotate around the second rotation axis Ax2 extending in the vertical direction with respect to the heat sink 36 so as to be orthogonal to the first rotation axis Ax1. Therefore, the optical axis adjustment in the left-right direction can be easily and accurately performed.

  Moreover, in the present embodiment, the reflector 50 that reflects a part of the light traveling from the light emitting element 32 in a direction other than the projection lens 62 toward the projection lens 62 is supported on the substrate 34. In addition to the direct light, the reflected light from the reflector 50 can also be used as the front irradiation light, and thereby the brightness of the low beam light distribution pattern PL can be increased.

  In the above embodiment, the description has been made assuming that the five light emitting elements 32 are provided. However, it is also possible to adopt a configuration in which the number of light emitting elements 32 other than this is provided.

  In the above-described embodiment, the shade 80 is described as being fixed to the lens holder 64 by screwing. However, the shade 80 is fixed by other methods (for example, welding, press-fitting, lance engagement, or the like). It is also possible.

  In the above embodiment, the reflector 50 is described as being supported by the substrate 34. However, a configuration in which the reflector 50 is supported by the heat sink 36 is also possible.

  In the above embodiment, the first and second rotation axes Ax1 and Ax2 are set as the rotation axes of the lens holder 64. However, only the first rotation axis Ax1 or the first rotation axis Ax1 is set. A configuration in which only the two rotation axes Ax2 are set is also possible.

  In the above embodiment, the lamp unit 20 is described as being configured to form the low beam light distribution pattern PL. However, the lamp unit 20 may be configured to form a fog lamp light distribution pattern or the like. It is.

  Next, a modification of the above embodiment will be described.

  First, the 1st modification of the said embodiment is demonstrated.

  FIG. 8 is a view similar to FIG. 3 showing the lamp unit 120 of the vehicular lamp according to this modification.

  As shown in the figure, the basic configuration of the lamp unit 120 of the present modification is the same as that of the above embodiment, but the point that the function for forming the light distribution pattern for high beam is added is described above. This is different from the case of the embodiment, and accordingly, the configuration of the shade 180 in the movable unit 160 is partially different from the case of the above embodiment.

  That is, the lamp unit 120 of the present modification has a configuration in which a plurality of (for example, three) second light emitting elements 152 are mounted on the substrate 34 below the light emitting elements 32 as a configuration of the fixed side unit 130. Yes.

  Each of the plurality of second light emitting elements 152 is a white light emitting diode having a rectangular light emitting surface, and is disposed in the vicinity of the lower portion of the shade 180 with the light emitting surface facing the front of the lamp. Light emitted from the two light emitting elements 152 is incident on the projection lens 62 through the space below the shade 180.

  The shade 180 of the present modification is configured as a plate-like member having a constant front-rear width and extending in the vehicle width direction, like the shade 80 of the above-described embodiment, and is screwed and fixed to the lens holder 64 at both left and right ends thereof. However, the intermediate portion other than the left and right end portions has a wedge-shaped vertical cross-sectional shape.

  Specifically, the lower surface of the shade 180 is formed so as to extend obliquely downward from the front edge 180a1 of the upward reflecting surface 180a toward the rear of the lamp at the intermediate portion thereof. The lower surface is configured as a downward reflecting surface 180c that shields part of the direct light from each second light emitting element 152 and reflects the shielded light downward. The shade 180 is configured to cause the light reflected by the downward reflecting surface 180 c to enter the projection lens 62.

  Further, in the fixed-side unit 130 of the present modification, a part of the light traveling from the plurality of second light emitting elements 152 to directions other than the projection lens 62 is reflected toward the projection lens 62 on the front surface of the substrate 34. Two reflectors 154 are supported. The second reflector 154 is disposed below the plurality of second light emitting elements 152, and the reflection surface 154 a is formed in a concave curved surface so as to surround the plurality of second light emitting elements 152.

  FIG. 6B is a perspective view showing a high-beam light distribution pattern PH formed on a virtual vertical screen arranged at a position 25 m ahead of the vehicle by light emitted from the vehicle lamp including the lamp unit 120. It is.

  The high-beam light distribution pattern PH includes light distribution patterns PL1 and PL2 formed by lighting of the five light emitting elements 32 and second light distribution patterns PH1 and PH2 formed by lighting of the plurality of second light emitting elements 152. Are formed as a combined light distribution pattern in which

  The light distribution patterns PL1 and PL2 are the same as the light distribution patterns PL1 and PL2 constituting the low beam light distribution pattern PL shown in FIG.

  The second light distribution pattern PH1 is a light distribution pattern formed by direct light (including reflected light from the downward reflecting surface 180c of the shade 180) from the plurality of second light emitting elements 152, and is bright horizontally long. As the light distribution pattern, the main region of the light distribution pattern PH for high beam is configured together with the light distribution pattern PL1.

  On the other hand, the second light distribution pattern PH2 is a light distribution pattern formed by light from the plurality of second light emitting elements 152 reflected by the reflector 154, and has a horizontally long distribution larger than the second light distribution pattern PH1. A diffusion region of the high beam light distribution pattern PH is configured together with the light distribution pattern PL2 as the light pattern.

  The second light distribution patterns PH1 and PH2 are continuously formed with the light distribution patterns PL1 and PL2 at the positions of the cut-off lines CL1 and CL2. This is because the middle portion of the lower surface of the shade 180 extends obliquely downward from the front edge 180a1 of the upward reflecting surface 180a toward the rear of the lamp.

  By adopting the configuration of this modification, it is possible to form the second light distribution patterns PH1 and PH2 above the low beam light distribution pattern PL.

  Accordingly, the low-beam light distribution pattern PL can be formed by lighting the five light-emitting elements 32, and the high-beam light distribution pattern PH can be formed by additionally lighting the plurality of second light-emitting elements 152.

  At that time, the shade 180 of the present modification has an intermediate portion on the lower surface extending obliquely downward from the front edge 180a1 of the upward reflecting surface 180a toward the rear of the lamp, and therefore the second light distribution patterns PH1 and PH2 are cut. The light distribution patterns PL1 and PL2 can be continuously formed at the positions of the offline lines CL1 and CL2, and thus the high beam light distribution pattern PH can be formed as a light distribution pattern without a dark portion. In addition, since the intermediate portion of the lower surface of the shade 180 is formed as the downward reflecting surface 180c, it is possible to sufficiently secure the brightness near the cutoff lines CL1 and CL2 of the second light distribution patterns PH1 and PH2.

  Further, in this modified example, the reflected light from the second reflector 154 is used as the forward irradiation light in addition to the direct light from the plurality of second light emitting elements 132, so that the high beam light distribution pattern is thereby obtained. The brightness of PH can be increased.

  In the first modified example, the second reflector 154 is described as being supported by the substrate 34. However, a configuration in which the second reflector 154 is supported by the heat sink 36 is also possible.

  Next, a second modification of the above embodiment will be described.

  FIG. 9 is a view similar to FIG. 3, showing a lamp unit 220 of a vehicle lamp according to this modification.

  As shown in the figure, the basic configuration of the lamp unit 220 of this modification is the same as that of the above embodiment, but the configuration of the movable side unit 260 is partially different from that of the above embodiment. .

  That is, the movable side unit 260 of this modification has a configuration in which a shade 264F corresponding to the shade 80 of the above embodiment is integrally formed with the lens holder 264.

  The shade 264F has the same shape as the shade 80 of the above embodiment and is disposed at the same position, but is connected to the lens holder 264 at both left and right ends thereof.

  The configuration of the front end annular portion 264A, the right leg portion 264B, and the right flange portion 264D of the lens holder 264 is the same as that of the lens holder 64 of the above embodiment, but the upper surface 264Ba of the right leg portion 264B is the right end portion of the shade 264F. It is formed flush with the upper surface of.

  The same applies to the configuration of the left leg portion and the left flange portion (not shown) of the lens holder 264.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as those of the above embodiment.

  Further, by adopting the configuration of the present modification, the configuration of the movable unit 260 can be simplified, and the positional relationship accuracy between the projection lens 62 and the shade 264F can be increased.

  Next, a third modification of the above embodiment will be described.

  FIG. 10 is a view similar to FIG. 3 showing the lamp unit 320 of the vehicular lamp according to this modification.

  As shown in the figure, the basic configuration of the lamp unit 320 of this modification is the same as that of the above embodiment, but the configuration of the movable side unit 360 is partially different from that of the above embodiment. .

  That is, in the movable unit 360 of this modification, the shade 380 corresponding to the shade 80 of the above embodiment is configured as a standing wall-like member extending along a vertical plane orthogonal to the lamp reference axis Ax.

  The upper end surface 380a of the shade 380 is formed in the left and right steps similarly to the upward reflecting surface 80a of the shade 80 of the above embodiment, and the front end edge 380a1 passes through the rear focal point F of the projection lens 62 so as to pass through the vehicle. It extends in the width direction. However, the upper end surface 380a of the shade 380 is not configured as a reflecting surface.

  The shade 380 is fixed to the lens holder 364 at the rear end portion of the lens holder 364. This fixing is performed by tightening a screw 382 to the right leg 364B of the lens holder 364 at the right end of the shade 380 and tightening a screw (not shown) to the left leg (not shown) of the lens holder 364 at the left end. Has been done by.

  In the present modification, the first rotation axis Ax1 of the movable unit 360 is located at the front end edge 380a1 of the upper end surface 380a of the shade 380.

  Therefore, the lens holder 364 has a right and left leg portion 264B (and a left leg portion (not shown)) that has a shorter front-rear length than that of the above embodiment, and a right flange portion 364D (and a left flange portion (not shown)). It is displaced more forward than the case of the said embodiment.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as those of the above embodiment.

  In addition, when the configuration of the present modification is employed, the reflected light from the upper end surface 380a of the shade 380 cannot be obtained, and thus the brightness of the light distribution pattern PL1 (see FIG. 6A) decreases accordingly. However, since the first rotation axis Ax1 of the movable side unit 360 is located at the front end edge 380a1 of the upper end surface 380a of the shade 380, the light shielding amount by the shade 380 even if the movable side unit 360 rotates in the vertical direction. Thus, the brightness and luminous intensity distribution of the light distribution pattern PL1 can be kept constant. For this reason, even with the low-beam light distribution pattern PL, the brightness and light intensity distribution can be hardly changed.

In addition, by adopting the configuration of the present modification, the depth dimension of the vehicular lamp can be further shortened.
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In the third modification, the shade 380 is described as being fixed to the lens holder 364 with screws. However, the shade 380 may be integrally formed with the lens holder 364.

  In addition, the numerical value shown as a specification in the said embodiment and its modification is only an example, and of course, you may set these to a different value suitably.

  The invention of the present application is not limited to the configuration described in the above-described embodiment and its modifications, and a configuration with various other changes can be adopted.

DESCRIPTION OF SYMBOLS 10 Vehicle lamp 12 Lamp body 12a Opening part 14 Translucent cover 16 Extension panel 20, 120, 220, 320 Lamp unit 30, 130 Fixed side unit 32 Light emitting element 34 Substrate 34a Connector part 36 Heat sink 36A Main part 36B Radiation fin 42 Pivot Pins 44, 46 Aiming screw 50 Reflector 50a, 154a Reflecting surface 60, 160, 260, 360 Movable side unit 62 Projection lens 62a Outer flange portion 64, 264, 364 Lens holder 64A, 264A Front end annular portion 64B, 264B, 364B Right leg Part 64Ba, 64Ca, 264Ba Upper surface 64Ba1, 64Ca1 Screw hole 64Bb, 64Cb Standing wall part 64C Left leg part 64D, 264D, 364D Right flange part 64Da, 4Db, 64Eb Opening 64E Left side flange 72 Spherical step bearing 74, 76 Aiming nut 80, 180, 264F, 380 Shade 80a, 180a Upward reflecting surface 80a1, 180a1, 380a1 Front end edge 80b Screw insertion hole 82, 382 Screw 152 2nd Light emitting element 154 Second reflector 180c Downward reflecting surface 380a Upper end surface A Engagement center position Ax Lamp reference axis Ax1 First rotation axis Ax2 Second rotation axis CL1 Lower cut-off line CL2 Upper cut-off line E Elbow point F Rear focus PH High beam light distribution pattern PH1, PH2 Second light distribution pattern PL Low beam light distribution pattern PL1, PL2 Light distribution pattern

Claims (6)

In a vehicular lamp configured to irradiate direct light from a light emitting element toward the front of the lamp through a projection lens,
It has a heat sink that supports the substrate on which the light emitting element is mounted,
The heat sink is attached to the opening formed in the lamp body,
Between the light emitting element and the projection lens, a shade for shielding downward direct light from the light emitting element toward the projection lens is disposed,
The shade is formed integrally with a lens holder that supports the projection lens,
The vehicular lamp, wherein the lens holder is supported so as to be rotatable about a rotation axis extending in a required direction with respect to the heat sink.   As the rotation axis, a first rotation axis extending in the horizontal direction so as to pass through a position near the front end edge of the shade between the light emitting element and the front end edge of the shade is set. The vehicular lamp according to claim 1.   The vehicular lamp according to claim 2, wherein a second rotation axis extending in a vertical direction so as to be orthogonal to the first rotation axis is set as the rotation axis.   The reflector which reflects a part of direct light which goes to directions other than the said projection lens from the said light emitting element toward the said projection lens is supported by the said board | substrate or the said heat sink. The vehicle lamp according to any one of the above. A second light emitting element is mounted at a position below the light emitting element on the substrate;
The said 2nd light emitting element is arrange | positioned in the position which can inject into the said projection lens the direct light from this 2nd light emitting element through the downward space of the said shade, The any one of Claims 1-4 characterized by the above-mentioned. Vehicle lamps.   The second reflector that reflects a part of direct light from the second light emitting element in a direction other than the projection lens toward the projection lens is supported on the substrate or the heat sink. Item 6. A vehicle lamp according to Item 5.

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