JP7268492B2 - vehicle headlight - Google Patents

Description

The present invention relates to a vehicle headlamp.

A vehicle headlamp having a movable shade mechanism is known. The movable shade mechanism controls the distribution of light from the light source. Patent Document 1 discloses a vehicle lamp that includes a light source unit and a light distribution control unit fixed to the light source unit. In the vehicle lamp disclosed in Patent Document 1, the light source unit includes a light source and a heat sink. The light distribution control unit has a movable shade and a solenoid. The light source unit and the light distribution control unit are fixed with screws.

JP 2014-229361 A

A movable shade blocks part of the light from the light source. The light source and the movable shade must be positioned with high accuracy so that part of the light from the light source is properly blocked.

Further, when fixing the movable shade mechanism and the heat sink, it is desired that the movable shade mechanism can be stably fixed to the heat sink.

An object of the present invention is to provide a vehicle headlamp in which a light source and a movable shade are accurately positioned.

Another object of the present invention is to provide a vehicle headlamp in which a movable shade mechanism can be stably fixed to a heat sink.

A vehicle headlamp according to the present invention includes a light source, a movable shade mechanism that controls light distribution from the light source, and a heat sink that supports the light source and the movable shade mechanism, wherein the movable shade mechanism comprises: a movable shade; a shaft that rotatably supports the movable shade; and a bracket that has a bracket base portion fixed to the heat sink and a support portion arranged above the bracket base portion and fixing the shaft. and the heat sink has a positioning portion for positioning the shaft.

Moreover, it is preferable that the positioning portion has a groove portion that is arranged above the bracket base portion and supports the shaft.

Further, the positioning portion includes a front-rear direction positioning portion that positions the shaft in the front-rear direction, and the front-rear direction positioning portion includes a front inner surface of the groove portion that is arranged on the front side of the shaft and is in contact with the shaft; and a rear inner surface of the groove disposed rearward of the shaft and in contact with the shaft.

Further, the positioning portion may include a vertical positioning portion for positioning the shaft in a vertical direction, and the vertical positioning portion may include a bottom surface of the groove disposed below the shaft and in contact with the shaft. preferable.

Further, a reflector is provided above the bracket base plate and reflects the light from the light source, and the bracket includes a fastening hole into which a screw is inserted and a slit provided partially around the fastening hole. and, preferably, the reflector, the bracket, and the heat sink are fixed with the screws in a state in which the bracket is sandwiched between the reflector and the heat sink.

The positioning portion includes a vertical positioning portion that positions the shaft in a vertical direction, and a reflector that is disposed above the bracket substrate portion and reflects the light from the light source, and the vertical positioning portion includes: and screws for fixing the reflector, the bracket and the heat sink with the bracket sandwiched between the reflector and the heat sink.

The positioning portion includes a left-right direction positioning portion for positioning the bracket in the left-right direction, the heat sink has a positioning pin, the bracket has a positioning hole in which the positioning pin is arranged, and the The left-right direction positioning portion includes a left inner surface of the positioning hole that is arranged on the left side of the positioning pin and contacts the positioning pin, and a right inner surface of the positioning hole that is arranged on the right side of the positioning pin and contacts the positioning pin. and preferably include

The positioning portion includes a lateral positioning portion for laterally positioning the bracket, and the movable shade mechanism has a lateral position regulating portion that contacts at least a portion of the movable shade. It is preferable that the portion includes a protrusion that is arranged above the bracket base portion and contacts the lateral position restricting portion to position the lateral position restricting portion in the lateral direction.

The positioning portion includes a vertical positioning portion that positions the shaft in a vertical direction, and a reflector that is disposed above the bracket substrate portion and reflects the light from the light source, and the vertical positioning portion includes: and screws for fixing the reflector, the bracket and the heat sink with the bracket sandwiched between the reflector and the heat sink.

The positioning portion includes a front-rear direction positioning portion for positioning the shaft in the front-rear direction, the heat sink has a positioning pin, the bracket has a positioning hole in which the positioning pin is arranged, and the The front-rear direction positioning part is arranged on the front side of the positioning hole with which the positioning pin contacts, and on the rear side of the positioning hole with which the positioning pin contacts. It preferably includes a lateral inner surface.

A vehicle headlamp according to the present invention includes a light source, a movable shade mechanism that controls light distribution from the light source, and a heat sink that supports the light source and the movable shade mechanism, wherein the movable shade mechanism comprises: It has a movable shade, a shaft that rotatably supports the movable shade, and a bracket fixed to the heat sink, and the bracket is connected via a bracket base portion fixed to the heat sink and a rear bent portion. a support portion connected to the rear portion of the bracket substrate portion to fix the shaft; and a front plate portion connected to the front portion of the bracket substrate portion via a front bent portion.

Moreover, it is preferable that a reflector is provided above the bracket substrate portion and reflects the light from the light source, and the heat sink is fixed to the reflector, the bracket, and the heat sink by screws.

Further, the bracket includes a pair of first projections projecting leftward and rightward from the bracket base portion, and first fastening holes provided in the first projections and into which the screws are inserted. , wherein the reflector comprises: the reflector main body; a pair of second projecting portions projecting leftward and rightward from the reflector main body; the heat sink includes a pair of third protrusions facing the first protrusions, and screws provided on the third protrusions to which the screws are coupled. and a hole, wherein the reflector, the bracket, and the heat sink are fixed by the screws in a state in which the first projecting portion is sandwiched between the second projecting portion and the third projecting portion. preferably.

Moreover, it is preferable that the movable shade mechanism has an actuator that generates power for rotating the movable shade, and that the actuator is arranged between the pair of first projecting portions in the left-right direction.

The heat sink has a heat sink substrate portion and a fin portion provided on the heat sink substrate portion. It is preferable to project forward.

ADVANTAGE OF THE INVENTION According to this invention, the vehicle headlamp which can position a light source and a movable shade with high precision is provided.

Further, according to the present invention, a vehicle headlamp is provided in which the movable shade mechanism can be stably fixed to the heat sink.

FIG. 1 is a perspective view showing the vehicle headlamp according to the first embodiment. FIG. 2 is an exploded perspective view showing the vehicle headlamp according to the first embodiment. FIG. 3 is a perspective view of a portion of the vehicle headlamp according to the first embodiment as seen from the rear right. FIG. 4 is an enlarged perspective view of a part of the vehicle headlamp according to the first embodiment. FIG. 5 is a plan view showing part of the vehicle headlamp according to the first embodiment. FIG. 6 is a cross-sectional view showing part of the vehicle headlamp according to the first embodiment. FIG. 7 is a cross-sectional view enlarging a part of the vehicle headlamp according to the first embodiment. FIG. 8 is a partially enlarged plan view of the vehicle headlamp according to the first embodiment. FIG. 9 is a cross-sectional view showing a first projecting portion, a second projecting portion, and a third projecting portion according to the first embodiment. FIG. 10 is a cross-sectional view showing the first projecting portion, the second projecting portion, and the third projecting portion according to the first embodiment. FIG. 11 is a cross-sectional view showing part of the vehicle headlamp according to the second embodiment. FIG. 12 is a cross-sectional view enlarging a part of the vehicle headlamp according to the second embodiment. FIG. 13 is a perspective view of a part of the vehicle headlamp according to the third embodiment as seen from the rear right. FIG. 14 is an enlarged perspective view of a part of the vehicle headlamp according to the third embodiment. FIG. 15 is a plan view showing part of the vehicle headlamp according to the third embodiment. FIG. 16 is a cross-sectional view showing part of the vehicle headlamp according to the third embodiment. FIG. 17 is an enlarged plan view of positioning pins and positioning holes according to the third embodiment. FIG. 18 is a cross-sectional view showing a part of the vehicle headlamp according to the third embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle headlamp according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited by embodiment. In addition, components in the embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

In the following description, the front-rear direction, the up-down direction, and the left-right direction indicate the directions of the vehicle headlamp when attached to the vehicle. Forward refers to the forward direction when the vehicle moves forward in a straight line. "Back" refers to the direction opposite to the front in the horizontal plane. Upward refers to a direction away from the running surface of the vehicle in a direction orthogonal to the horizontal plane. Downward refers to the direction opposite to the upward direction in the direction orthogonal to the horizontal plane. "Left" refers to the left direction when the vehicle is moving forward in a straight line. Rightward means the opposite direction of leftward in the horizontal plane.

[First embodiment]
FIG. 1 is a perspective view showing a vehicle headlamp 1 according to this embodiment. FIG. 2 is an exploded perspective view showing the vehicle headlamp 1 according to this embodiment. As shown in FIGS. 1 and 2, the vehicle headlamp 1 includes a light source 10, a movable shade mechanism 20 for controlling light distribution of the light from the light source 10, a reflector 30 for reflecting the light from the light source 10, A lens 40 to which light reflected by the reflector 30 is supplied, and a heat sink 50 that supports the light source 10 and the movable shade mechanism 20 are provided. In this embodiment, the vehicle headlamp 1 is configured by a projector-type lamp unit.

The vehicle headlamp 1 is attached to each of the left and right parts of the front part of the vehicle. When mounted on a vehicle, the vehicle headlamp 1 is housed in a lamp chamber formed by a lamp housing and a lamp lens. Further, the vehicle headlamp 1 is connected to an optical axis adjusting mechanism. The optical axis adjustment mechanism adjusts the position of the optical axis in each of the vertical direction and the horizontal direction. In this embodiment, the vehicle headlamp 1 is assumed to be a vehicle headlamp attached to the right side of the vehicle. The vehicle headlamp 1 attached to the left portion of the vehicle has the same structure as the vehicle headlamp 1 attached to the right portion of the vehicle.

A clearance lamp unit, a turn signal lamp unit, and a daytime running lamp unit may be arranged in the lamp chamber in addition to the vehicle headlamp 1 according to the present embodiment. Also, an inner panel, an inner housing, and an inner lens may be arranged in the lamp chamber.

The light source 10 emits light. Examples of the light source 10 include solid-state light sources such as light emitting diodes (LEDs), semiconductor lasers (LDs), and organic electroluminescence (OELs). Light source 10 has a light emitting surface 11 . The light emitting surface 11 faces upward. The light emitting surface 11 is parallel to the horizontal plane. A light source 10 is held by a light source holder 12 .

The light source holder 12 is fixed to the heat sink 50 with screws 13 . The light source 10 is fixed to the heat sink 50 by fixing the light source holder 12 to the heat sink 50 . The light source 10 is arranged below the optical axis AX of the lens 40 .

The movable shade mechanism 20 shields part of the light emitted from the light source 10 and reflected by the reflector 30 . The movable shade mechanism 20 has a movable shade 21 , a shaft 22 that rotatably supports the movable shade 21 , a bracket 23 fixed to the heat sink 50 , and an actuator 24 that generates power to rotate the movable shade 21 . The light shielding amount is adjusted by rotating the movable shade 21 . The movable shade 21 rotates between a first position P1 at which the light from the light source 10 is shielded by a first shielding amount and a second position P2 at which the light is shielded by a second shielding amount smaller than the first shielding amount. do.

The reflector 30 reflects light from the light source 10 and supplies it to the lens 40 . The upper end of the reflector 30 is arranged above the upper end of the movable shade mechanism 20 .

The movable shade mechanism 20 and reflector 30 are fixed to the heat sink 50 with screws 31 .

The lens 40 is arranged forward of the reflector 30 . A lens 40 is held by a lens holder 41 . The lens holder 41 is attached to the reflector 30 . The optical axis AX of the lens 40 coincides with the optical axis of the reflector 30 . Light emitted from the light source 10 and reflected by the reflector 30 is supplied to the lens 40 . Also, part of the light emitted from the light source 10 is supplied to the lens 40 without passing through the reflector 30 . The light supplied to the lens 40 is projected forward of the vehicle.

A heat sink 50 supports the light source 10 , the movable shade mechanism 20 and the reflector 30 . The heat sink 50 radiates heat generated from the light source 10 .

FIG. 3 is a perspective view of a portion of the vehicle headlamp 1 according to the present embodiment as seen from the rear right. FIG. 4 is an enlarged perspective view of a part of the vehicle headlamp 1 according to this embodiment. FIG. 5 is a plan view showing a portion of the vehicle headlamp 1 according to this embodiment. FIG. 3 is a diagram showing a state in which the reflector 30 and the lens 40 are removed from the vehicle headlamp 1. As shown in FIG. FIG. 4 corresponds to an enlarged view of part A of FIG. FIG. 5 is a diagram showing a state in which the reflector 30 is removed from the vehicle headlamp 1. As shown in FIG.

The movable shade mechanism 20 includes a movable shade 21, a shaft 22 that rotatably supports the movable shade 21, a bracket 23 that supports the movable shade 21, and an actuator 24 that generates power for rotating the movable shade 21. have.

The movable shade 21 has a shade portion 21A arranged on the optical path of the light from the light source 10 and a bearing portion 21B connected to the shaft 22 . The shade portion 21A is a plate-like member that shields part of the light from the light source 10. As shown in FIG. The bearing portion 21B is a plate-like member fixed to the rear surface of the shade portion 21A. Two bearing portions 21B are provided with an interval in the left-right direction.

The shaft 22 rotatably supports the movable shade 21 . A through hole 25 is formed in the bearing portion 21B. The shaft 22 is inserted into the through hole 25 . A spring 26 is arranged around the shaft 22 . One end of the spring 26 is fixed to the movable shade 21 . The other end of spring 26 is fixed to bracket 23 . The spring 26 generates elastic force to move the movable shade 21 to the first position P1.

Bracket 23 supports shaft 22 and actuator 24 . Bracket 23 is fixed to heat sink 50 . The bracket 23 is configured by one metal plate member. The bracket 23 includes a bracket substrate portion 23A fixed to the heat sink 50, a support portion 23B arranged above the bracket substrate portion 23A and fixing the shaft 22, and a front plate portion arranged in front of the bracket substrate portion 23A. 23C, a pair of first projecting portions 23D projecting leftward and rightward from the bracket base plate portion 23A, and first fastening holes 23E provided in the first projecting portions 23D and into which screws 31 are inserted. have.

The bracket board portion 23A has an upper surface and a lower surface. Each of the upper and lower surfaces of the bracket substrate portion 23A is parallel to the horizontal plane. The reflector 30 is arranged above the bracket substrate portion 23A. The heat sink 50 is arranged below the bracket substrate portion 23A. The upper surface of the bracket substrate portion 23A faces the reflector 30. As shown in FIG. A lower surface of the bracket substrate portion 23A faces the heat sink 50 .

The support portion 23B is connected to the rear portion of the bracket substrate portion 23A via the rear bent portion 23F. The support portion 23B is formed by bending upward the rear portion of the plate member including the bracket base portion 23A. Support portion 23B includes a first support portion 23B that supports the left portion of shaft 22 and a second support portion 23B that supports the right portion of shaft 22 . The first support portion 23B is arranged to the left of the left bearing portion 21B of the pair of bearing portions 21B. The second support portion 23B is arranged to the right of the right bearing portion 21B of the pair of bearing portions 21B.

As shown in FIG. 4 , the support portion 23B includes a front support portion 23Ba arranged forward of the shaft 22 and a rear support portion 23Bb arranged rearward of the shaft 22 . The front support portion 23Ba includes a first bent portion 23Ba1 that is bent forward and a second bent portion 23Ba2 that is bent rearward from the front end of the first bent portion 23Ba1. The front support portion 23Ba is bent to surround a portion of the shaft 22. As shown in FIG. The rear support portion 23Bb is arranged to the left and to the right of the front support portion 23Ba. A portion of the outer surface of the shaft 22 contacts the inner surface of the front support portion 23Ba. A portion of the outer surface of the shaft 22 contacts the front surface of the rear support portion 23Bb. By crimping the front support portion 23Ba, the shaft 22 is fixed to the support portion 23B.

The front plate portion 23C is connected to the front portion of the bracket substrate portion 23A via the front bent portion 23G. The front plate portion 23C is formed by bending downward the front portion of a plate member including the bracket base portion 23A.

The first projecting portion 23D is connected to each of the left and right portions of the bracket substrate portion 23A. The upper surface of the bracket substrate portion 23A and the upper surface of the first projecting portion 23D are arranged in the same plane. The lower surface of the bracket substrate portion 23A and the lower surface of the first projecting portion 23D are arranged on the same plane. The upper and lower surfaces of the first projecting portion 23D are parallel to the horizontal plane.

The first fastening hole 23E is provided in the front portion of the first projecting portion 23D. The first fastening hole 23E is a through hole that connects the upper surface and the lower surface of the first projecting portion 23D. A screw 31 is inserted into the first fastening hole 23E.

In this embodiment, the first protruding portion 23D has a slit 23H provided in a part of the periphery of the first fastening hole 23E. The slit 23H is arcuate in a plane parallel to the horizontal plane. A part of the slit 23H is provided behind the first fastening hole 23E. A part of the slit 23H is provided at a position closer to the center of the bracket base plate portion 23A than the first fastening hole 23E in the left-right direction.

By providing the slit 23H, a portion of the first projecting portion 23D including the first fastening hole 23E can bend in the vertical direction. A portion of the first projecting portion 23D between the slit 23H and the first fastening hole 23E can be elastically deformed in the vertical direction.

Actuator 24 includes a solenoid. The solenoid is connected to the power supply. The power generated by the actuator 24 is transmitted to the movable shade 21 via the power transmission mechanism. Actuator 24 is connected to bracket 23 . The actuator 24 is arranged on the rear surface of the front plate portion 23C of the bracket 23 between the pair of first projecting portions 23D.

As shown in FIGS. 1 and 2, the reflector 30 includes a reflector body 32, a pair of second projecting portions 33 projecting leftward and rightward from the reflector body 32, and and a second fastening hole 34 in which the screw 31 is inserted.

The reflector body 32 is a substantially semi-cylindrical member. A reflecting surface that reflects the light from the light source 10 is provided on the inner surface of the reflector body 32 .

The second projecting portion 33 projects leftward and rightward from the lower portion of the reflector body 32 . The second protruding portion 33 is connected to the left lower end and the right lower end of the reflector body 32 , respectively. The upper and lower surfaces of the second projecting portion 33 are parallel to the horizontal plane. The second projecting portion 33 faces the first projecting portion 23D.

The second fastening hole 34 is a through hole connecting the upper surface and the lower surface of the second projecting portion 33 . A screw 31 is inserted into the second fastening hole 34 .

The heat sink 50 projects forward from a heat sink substrate portion 51 , a plurality of fin portions 52 provided on the upper and lower surfaces of the heat sink substrate portion 51 , and from the left and right front portions of the heat sink substrate portion 51 . It has a pair of third projecting portions 53 and screw holes 54 provided in the third projecting portions 53 and to which the screws 31 are coupled.

The heat sink substrate portion 51 supports the light source 10 and the movable shade mechanism 20 . As shown in FIG. 3 , the light source holder 12 that holds the light source 10 is fixed to the central portion of the upper surface of the heat sink substrate portion 51 with screws 13 .

The third protruding portions 53 protrude forward from each of the left and right portions of the front portion of the heat sink substrate portion 51 . The upper surface of the third projecting portion 53 is parallel to the horizontal plane. The upper surface of the third projecting portion 53 faces the lower surface of the first projecting portion 23D.

The reflector 30 , the bracket 23 of the movable shade mechanism 20 and the heat sink 50 are fixed by screws 31 . The reflector 30 is arranged above the bracket 23 . The heat sink 50 is arranged below the bracket 23 . The reflector 30 , the bracket 23 and the heat sink 50 are fixed with screws 31 while the bracket 23 is sandwiched between the reflector 30 and the heat sink 50 .

In this embodiment, the upper surface of the first projecting portion 23D and the lower surface of the second projecting portion 33 face each other. The lower surface of the first projecting portion 23D and the upper surface of the third projecting portion 53 face each other. A first fastening hole 23</b>E is provided in the first projecting portion 23</b>D, a second fastening hole 34 is provided in the second projecting portion 33 , and a screw hole 54 is provided in the third projecting portion 53 . The reflector 30 , the bracket 23 and the heat sink 50 are fixed with screws 31 while the first projecting portion 23</b>D is sandwiched between the second projecting portion 33 and the third projecting portion 53 .

FIG. 6 is a sectional view showing a part of the vehicle headlamp 1 according to this embodiment. FIG. 7 is a cross-sectional view enlarging a part of the vehicle headlamp 1 according to this embodiment. FIG. 8 is a partially enlarged plan view of the vehicle headlamp 1 according to this embodiment. FIG. 6 corresponds to a cross-sectional view taken along line BB of FIG. FIG. 7 corresponds to an enlarged view of the portion C of FIG. FIG. 8 corresponds to an enlarged view of part D in FIG.

The heat sink 50 has a positioning portion 60 that positions the bracket 23 . The movable shade 21 is positioned by positioning the shaft 22 and the bracket 23 . The positioning portion 60 includes a front-rear direction positioning portion 60A that positions the shaft 22 in the front-rear direction, a vertical direction positioning portion 60B that positions the shaft 22 in the vertical direction, and a left-right direction positioning portion 60C that positions the bracket 23 in the left-right direction. include.

In this embodiment, the positioning portion 60 includes a protrusion 61 that protrudes upward from the heat sink substrate portion 51 and a groove portion 62 provided in the protrusion 61 .

The groove portion 62 is arranged above the bracket substrate portion 23A. The shaft 22 is arranged in the groove portion 62 . The groove portion 62 supports the shaft 22 . The shaft 22 contacts at least part of the inner surface of the groove portion 62 . The movable shade 21 connected to the shaft 22 is positioned by the shaft 22 contacting at least part of the inner surface of the groove 62 .

As shown in FIG. 7, the inner surfaces of the groove portion 62 include a front inner surface 62A arranged forward of the shaft 22, a rear inner surface 62B arranged rearward of the shaft 22, and a lower portion of the shaft 22. and a bottom surface 62C. Shaft 22 contacts each of front inner surface 62A, rear inner surface 62B, and bottom surface 62C.

The longitudinal positioning portion 60A includes a front inner surface 62A of the groove portion 62 that contacts the shaft 22 and a rear inner surface 62B of the groove portion 62 that contacts the shaft 22 . The vertical positioning portion 60B includes a bottom surface 62C of the groove portion 62 that contacts the shaft 22. As shown in FIG.

The movable shade 21 connected to the shaft 22 is positioned in the front-rear direction by the shaft 22 coming into contact with the front inner surface 62A and the rear inner surface 62B. The movable shade 21 connected to the shaft 22 is vertically positioned by the contact of the shaft 22 with the bottom surface 62C. Thus, in the present embodiment, the front-rear direction positioning portion 60A and the vertical direction positioning portion 60B include the projecting portion 61 and the groove portion 62 .

The heat sink 50 also has positioning pins 55 that protrude upward from the third projecting portion 53 . Bracket 23 has positioning holes 27 in which positioning pins 55 are arranged. The positioning hole 27 is provided behind the first fastening hole 23E and the slit 23H in the first projecting portion 23D. The positioning hole 27 is a through hole connecting the upper surface and the lower surface of the first projecting portion 23D. When the positioning pin 55 is arranged in the positioning hole 27, the upper end of the positioning pin 55 protrudes above the upper surface of the first projecting portion 23D.

As shown in FIG. 5, the positioning holes 27 are provided in each of the pair of first projecting portions 23D. A pair of positioning pins 55 are provided so as to correspond to the pair of positioning holes 27 . The one positioning pin 55 and one positioning hole 27 have the same structure as the other positioning pin 55 and the other positioning hole 27 .

As shown in FIG. 8 , the inner surface of the positioning hole 27 includes a left inner surface 27A arranged on the left side of the positioning pin 55 and a right inner surface 27B arranged on the right side of the positioning pin 55 .

The lateral positioning portion 60</b>C includes a left inner surface 27</b>A of the positioning hole 27 that contacts the positioning pin 55 and a right inner surface 27</b>B of the positioning hole 27 that contacts the positioning pin 55 . The positioning pin 55 contacts each of the left inner surface 27A and the right inner surface 27B.

The positioning pin 55 contacts the left inner surface 27A and the right inner surface 27B of the bracket 23 to regulate the horizontal position of the bracket 23, thereby positioning the movable shade 21 in the horizontal direction. Thus, the lateral positioning portion 60</b>C includes the positioning pin 55 and the positioning hole 27 .

9 and 10 are cross-sectional views showing the first projecting portion 23D, the second projecting portion 33, and the third projecting portion 53 according to the present embodiment. Each of FIGS. 9 and 10 corresponds to a cross-sectional view taken along line EE of FIG.

When fixing the reflector 30, the movable shade mechanism 20, and the heat sink 50, as shown in FIG. The reflector 30, the movable shade mechanism 20, and the heat sink are arranged so that the first fastening hole 23E, the second fastening hole 34, and the screw hole 54 are aligned with the bottom surface of the third projecting portion 53 facing the bottom surface of the third projecting portion 53. 50 are aligned. The screw 31 is provided in the second fastening hole 34 provided in the second projecting portion 33, the first fastening hole 23E provided in the first projecting portion 23D, and the third projecting portion 53. It is inserted into the threaded hole 54 .

As shown in FIG. 10, by tightening the screw 31, the second projecting portion 33 and the first projecting portion 23D are closely attached, and the first projecting portion 23D and the third projecting portion 53 are closely attached. . The reflector 30 , the bracket 23 and the heat sink 50 are fixed with screws 31 while the first projecting portion 23</b>D is sandwiched between the second projecting portion 33 and the third projecting portion 53 . Further, by tightening the screw 31, the shaft 22 and the bottom surface 62C of the groove portion 62 come into contact with each other, as described with reference to FIG.

In this embodiment, a slit 23H is provided in part around the first fastening hole 23E. Due to the provision of the slit 23H, when the screw 31 is tightened, as shown in FIG. 10, a portion of the first projecting portion 23D including the first fastening hole 23E bends below the bracket base portion 23A. That is, a portion of the first projecting portion 23D between the slit 23H and the first fastening hole 23E is elastically deformed below the bracket base portion 23A. The elastic deformation of the bracket base plate portion 23A is allowed by the slits 23H, so that the shaft 22 can reliably contact the bottom surface 62C of the groove portion 62 even if the bracket 23 or the shaft 22 has a dimensional error.

As described above, according to this embodiment, the heat sink 50 is arranged below the bracket substrate portion 23A. A heat sink 50 supports the light source 10 and the movable shade mechanism 20 . The heat sink 50 has a positioning portion 60 that positions the shaft 22 . Since the heat sink 50 that supports the light source 10 and the movable shade mechanism 20 has the positioning portion 60 that positions the shaft 22, the light source 10 and the shaft 22 are precisely positioned.

In the present embodiment, the front-rear direction positioning portion 60A and the vertical direction positioning portion 60B include a protrusion 61 that protrudes upward from the heat sink substrate portion 51 of the heat sink 50, and a groove portion 62 that is provided in the protrusion 61 and supports the shaft 22. include. The lateral positioning portion 60</b>C includes a positioning pin 55 that protrudes upward from the third projecting portion 53 of the heat sink 50 and is arranged in the positioning hole 27 . The projecting portion 61 is arranged above the upper surface of the bracket substrate portion 23A. The positioning pin 55 is arranged above the upper surface of the first projecting portion 23D. That is, in the present embodiment, the positioning portion 60 (60A, 60B, 60C) has a portion (projection portion 61, positioning pin 55) arranged above the upper surface of the bracket 23. As shown in FIG. Since the heat sink 50 arranged below the bracket 23 has the positioning portion 60 arranged above the upper surface of the bracket 23, the heat sink 50 can position the shaft 22 with high accuracy.

Further, according to the present embodiment, the bracket 23 of the movable shade mechanism 20 is connected to the bracket substrate portion 23A fixed to the heat sink 50 and the rear portion of the bracket substrate portion 23A via the rear bent portion 23F, and the shaft 22 is connected to the bracket substrate portion 23A. It has a support portion 23B for supporting, and a front plate portion 23C connected to the front portion of the bracket base plate portion 23A via a front bent portion 23G. A bracket substrate portion 23A fixed to the heat sink 50, a support portion 23B supporting the shaft 22, and a front plate portion 23C arranged in front of the heat sink 50 are formed by simply bending one plate member. The bracket substrate portion 23A has a plate shape having a lower surface facing the heat sink 50 . Therefore, the bracket board portion 23A is stably fixed to the heat sink 50 . The contact area between the bracket substrate portion 23A and the heat sink 50 is large. Therefore, the bracket board portion 23A is stably fixed to the heat sink 50 .

The reflector 30 is arranged above the bracket substrate portion 23A. The heat sink 50 is arranged below the bracket substrate portion 23A. Therefore, the reflector 30 , the bracket 23 and the heat sink 50 are stably fixed by the screws 31 in a state where the reflector 30 , the bracket 23 and the heat sink 50 are stacked vertically.

The bracket 23 has a pair of first projecting portions 23D projecting leftward and rightward from the bracket base portion 23A, and first fastening holes 23E provided in the first projecting portions 23D and into which the screws 31 are inserted. have The reflector 30 includes a reflector main body 32, a pair of second projecting portions 33 projecting leftward and rightward from the reflector main body 32, and second projections 33 provided on the second projecting portions 33 and into which screws 31 are inserted. 2 fastening holes 34 . The heat sink 50 has a pair of third protrusions 53 facing the first protrusions 23D, and screw holes 54 provided in the third protrusions 53 to which the screws 31 are coupled. As a result, the reflector 30, the bracket 23, and the heat sink 50 are stacked vertically, and the reflector 30 and the first projecting portion 23D are sandwiched between the second projecting portion 33 and the third projecting portion 53. The bracket 23 and the heat sink 50 are fixed with screws 31 with good workability. Moreover, the reflector 30 , the bracket 23 and the heat sink 50 are stably fixed with screws 31 .

The actuator 24 of the movable shade mechanism 20 is arranged between the pair of first projections 23D in the left-right direction. This prevents the size of the vehicle headlamp 1 from increasing in the left-right direction.

The heat sink 50 has a heat sink substrate portion 51 and fin portions 52 provided on the heat sink substrate portion 51 . The third protruding portions 53 protrude forward from each of the left and right portions of the front portion of the heat sink substrate portion 51 . This prevents the size of the vehicle headlamp 1 from increasing in the left-right direction.

[Second embodiment]
A second embodiment will be described. In the following description, the same reference numerals are given to components that are the same as or equivalent to those of the above-described embodiment, and the description thereof will be simplified or omitted.

In the above-described embodiment, the slit 23H is provided partially around the first fastening hole 23E, and the shaft 22 is brought into contact with the bottom surface 62C of the groove 62 by tightening the screw 31 . When the shaft 22 contacts the bottom surface 62C of the groove portion 62, the shaft 22 is positioned in the vertical direction.

The slit 23H may be omitted. The reflector 30, the bracket 23, and the heat sink 50 are fixed by the screws 31 in a state in which the first projecting portion 23D without the slit 23H is sandwiched between the second projecting portion 33 and the third projecting portion 53. As a result, the shaft 22 is vertically positioned.

FIG. 11 is a sectional view showing part of the vehicle headlamp 1 according to this embodiment. FIG. 12 is a sectional view enlarging a part of the vehicle headlamp 1 according to this embodiment. FIG. 12 corresponds to an enlarged view of the F portion of FIG.

As shown in FIGS. 11 and 12, in this embodiment, it is preferable that the shaft 22 and the bottom surface 62C of the groove 62 are separated even when the screw 31 is tightened. Even if the screw 31 is tightened, since the shaft 22 and the bottom surface 62C of the groove portion 62 are separated from each other, excessive force acting on the shaft 22 in the vertical direction is suppressed. Even if the shaft 22 and the bottom surface 62C of the groove portion 62 are separated from each other, the first projecting portion 23D is fixed by the screws 31 while being sandwiched between the second projecting portion 33 and the third projecting portion 53. , the shaft 22 is positioned vertically.

That is, in the present embodiment, the vertical positioning portion 60B includes screws 31 for fixing the reflector 30, the bracket 23, and the heat sink 50 with the bracket 23 sandwiched between the reflector 30 and the heat sink 50. FIG.

As in the first embodiment described above, the front-rear direction positioning portion 60A includes a front inner surface 62A of the groove portion 62 that is disposed forward of the shaft 22 and contacts the shaft 22, and a front inner surface 62A of the groove portion 62 that is disposed rearward of the shaft 22 and contacts the shaft 22. and a rear inner surface 62B of the groove portion 62. The left-right direction positioning portion 60C includes the left inner surface 27A of the positioning hole 27 that is arranged on the left side of the positioning pin 55 and contacts the positioning pin 55, and the positioning hole 27 that is arranged on the right side of the positioning pin 55 and contacts the positioning pin 55. and right inner surface 27B. The shaft 22 is positioned in the front-rear direction by contacting the front inner surface 62A and the rear inner surface 62B of the groove 62, respectively. The positioning pin 55 contacts the left inner surface 27A and the right inner surface 27B of the positioning hole 27 to position the bracket 23 in the left-right direction.

[Third embodiment]
A third embodiment will be described. In the following description, the same reference numerals are given to components that are the same as or equivalent to those of the above-described embodiment, and the description thereof will be simplified or omitted.

FIG. 13 is a perspective view of part of the vehicle headlamp 1 according to the present embodiment as seen from the rear right. FIG. 14 is an enlarged perspective view of a part of the vehicle headlamp 1 according to this embodiment. FIG. 15 is a plan view showing a portion of the vehicle headlamp 1 according to this embodiment. FIG. 13 is a diagram showing a state in which the reflector 30 and the lens 40 are removed from the vehicle headlamp 1. As shown in FIG. FIG. 14 corresponds to an enlarged view of the G portion of FIG. FIG. 15 is a diagram showing a state in which the reflector 30 is removed from the vehicle headlamp 1. As shown in FIG.

In this embodiment, the movable shade mechanism 20 has a lateral position regulating portion 29 that contacts at least a portion of the movable shade 21 to position the movable shade 21 in the lateral direction.

The bracket 23 has a bracket base portion 23A and a support portion 23B arranged above the bracket base portion 23A and fixing the shaft 22, as in the above-described embodiment.

As shown in FIG. 14, in the present embodiment, the support portion 23B includes a front support portion 23Ba arranged forward of the shaft 22, a rear support portion 23Bb arranged rearward of the shaft 22, and the shaft 22 and a rear side support portion 23Bc arranged rearward. The rear support portion 23Bc is arranged at a position closer to the bearing portion 21B than the rear support portion 23Bb.

By crimping the front side support portion 23Ba, the shaft 22 is pressed against the rear side support portion 23Bc. Thereby, the shaft 22 is fixed to the support portion 23B.

The rear support portion 23</b>Bc includes a lateral position restricting portion 29 . A lateral position restricting portion 29 is formed by bending a portion of the rear side support portion 23Bc facing the bearing portion 21B rearward. In the left-right direction, the left-right position restricting portion 29 is adjacent to the bearing portion 21B. The lateral position restricting portion 29 contacts the bearing portion 21B. The movable shade 21 is positioned in the left-right direction by the lateral position restricting portion 29 coming into contact with the bearing portion 21B. Further, the lateral position restricting portion 29 positions the movable shade mechanism 20 with respect to the heat sink 50 in the lateral direction.

In this embodiment, the left-right direction positioning portion 60C includes a projecting portion 63 arranged above the bracket base portion 23A. The projecting portion 63 projects upward from the heat sink substrate portion 51 of the heat sink 50 . The projecting portion 63 is adjacent to the lateral position restricting portion 29 in the lateral direction. The projecting portion 63 contacts the lateral position restricting portion 29 . The projecting portion 63 positions the lateral position restricting portion 29 in the lateral direction.

FIG. 16 is a sectional view showing part of the vehicle headlamp 1 according to this embodiment. 16 corresponds to a cross-sectional view taken along the line HH of FIG. 15. FIG. The movable shade 21 has a pair of bearings 21B. A pair of lateral position restricting portions 29 are provided so as to correspond to the pair of bearing portions 21B. A pair of projecting portions 63 are provided so as to correspond to the pair of left and right position restricting portions 29 .

The lateral position restricting portion 29 includes a first lateral position restricting portion 29 disposed to the left of the left bearing portion 21B and a second lateral position restricting portion disposed to the right of the right bearing portion 21B. 29. The first lateral position regulating portion 29 is arranged so as to contact the left surface of the left bearing portion 21B. The second lateral position restricting portion 29 is arranged so as to contact the right surface of the right bearing portion 21B.

The protrusions 63 include a first protrusion 63 arranged to the left of the left lateral position regulating part 29 and a second protrusion 63 arranged to the right of the right lateral position regulating part 29 . including. The first projecting portion 63 is arranged so as to contact the left surface of the left lateral position restricting portion 29 . The second projecting portion 63 is arranged so as to contact the right surface of the right lateral position restricting portion 29 .

The projecting portion 63 contacts the lateral position restricting portion 29 to position the lateral position restricting portion 29 in the lateral direction. By positioning the lateral position restricting portion 29 in the lateral direction, the movable shade 21 including the bearing portion 21B that contacts the lateral position restricting portion 29 is also laterally positioned. Thus, in this embodiment, the lateral positioning portion 60</b>C has the projecting portion 63 arranged above the upper surface of the bracket 23 .

Similar to the above-described second embodiment, the vertical positioning portion 60B includes screws 31 for fixing the reflector 30, the bracket 23, and the heat sink 50 while the bracket 23 is sandwiched between the reflector 30 and the heat sink 50. FIG. The reflector 30 , the bracket 23 and the heat sink 50 are fastened together with the screws 31 while the first projecting portion 23</b>D of the bracket 23 is sandwiched between the second projecting portion 33 of the reflector 30 and the third projecting portion 53 of the heat sink 50 . By being fixed, the movable shade 21 is vertically positioned.

The heat sink 50 also has positioning pins 56 protruding upward. Bracket 23 has positioning holes 28 in which positioning pins 56 are arranged. The positioning hole 28 is provided behind the first fastening hole 23E in the first projecting portion 23D. The positioning hole 28 is a through hole connecting the upper surface and the lower surface of the first projecting portion 23D. When the positioning pin 56 is arranged in the positioning hole 28, the upper end of the positioning pin 56 protrudes above the upper surface of the first projecting portion 23D.

As shown in FIG. 15, the positioning holes 28 are provided in each of the pair of first projecting portions 23D. A pair of positioning pins 56 are provided so as to correspond to the pair of positioning holes 28 .

FIG. 17 is an enlarged plan view of the positioning pin 56 and the positioning hole 28 according to this embodiment. FIG. 17 corresponds to an enlarged view of part I of FIG. The one positioning pin 56 and one positioning hole 28 have the same structure as the other positioning pin 56 and the other positioning hole 28 .

As shown in FIG. 17 , the inner surface of the positioning hole 28 includes a front inner surface 28A arranged on the front side of the positioning pin 56 and a rear inner surface 28B arranged on the rear side of the positioning pin 56 .

In this embodiment, the front-rear direction positioning portion 60A includes a front inner surface 28A of the positioning hole 28 with which the positioning pin 56 contacts, and a rear inner surface 28B of the positioning hole 28 with which the positioning pin 56 contacts. The locating pin 56 contacts each of the front inner surface 28A and the rear inner surface 28B.

The movable shade 21 supported by the bracket 23 is positioned in the front-rear direction by the positioning pin 56 coming into contact with the front inner surface 28A and the rear inner surface 28B of the bracket 23 respectively. Thus, the longitudinal positioning portion 60A includes the positioning pin 56 and the positioning hole 28. As shown in FIG.

As described above, in the present embodiment, the lateral positioning portion 60</b>C includes the protrusion 63 that protrudes upward from the heat sink substrate portion 51 of the heat sink 50 and the lateral position restricting portion 29 that contacts the protrusion 63 . The front-rear direction positioning portion 60A includes a positioning pin 56 that protrudes upward from the third projecting portion 53 of the heat sink 50 and is arranged in the positioning hole 28 . The projecting portion 63 is arranged above the upper surface of the bracket substrate portion 23A. The positioning pin 56 is arranged above the upper surface of the first projecting portion 23D. That is, also in this embodiment, the positioning portion 60 (60C, 60A) has a portion (projection portion 63, positioning pin 56) arranged above the upper surface of the bracket 23. As shown in FIG. Since the heat sink 50 arranged below the bracket 23 has the positioning portion 60 arranged above the upper surface of the bracket 23, the heat sink 50 can position the movable shade 21 with high accuracy.

FIG. 18 is a sectional view showing a part of the vehicle headlamp 1 according to this embodiment. FIG. 18 shows a modification of FIG. As shown in FIG. 18 , the protrusions 63 are arranged to the left of the third protrusion 63 and the right lateral position regulating portion 29, respectively. A fourth protrusion 63 may be included. The third projecting portion 63 is arranged so as to contact the right surface of the left lateral position restricting portion 29 . The fourth projecting portion 63 is arranged so as to contact the left surface of the right lateral position restricting portion 29 .

In the example shown in FIG. 18 as well, the projecting portion 63 contacts the lateral position restricting portion 29 to position the lateral position restricting portion 29 in the lateral direction. By positioning the lateral position restricting portion 29 in the lateral direction, the movable shade 21 including the bearing portion 21B that contacts the lateral position restricting portion 29 is positioned laterally.

DESCRIPTION OF SYMBOLS 1... Vehicle headlamp 10... Light source 11... Light emitting surface 12... Light source holder 13... Screw 20... Movable shade mechanism 21... Movable shade 21A... Shade part 21B... Bearing part 22... Shaft , 23... Bracket, 23A... Bracket substrate part, 23B... Support part, 23Ba... Front side support part, 23Ba1... First bending part, 23Ba2... Second bending part, 23Bb... Rear side support part, 23Bc... Rear side support part, 23C front plate portion 23D first projecting portion 23E first fastening hole 23F rear bent portion 23G front bent portion 23H slit 24 actuator 25 through hole 26 spring , 27 Positioning hole 27A Left inner surface 27B Right inner surface 28 Positioning hole 28A Front inner surface 28B Rear inner surface 29 Left/right position regulating portion 30 Reflector 31 Screw 32 Reflector Main body 33 Second projecting portion 34 Second fastening hole 40 Lens 41 Lens holder 50 Heat sink 51 Heat sink substrate portion 52 Fin portion 53 Third projecting portion 54 Threaded hole 55 Positioning pin 56 Positioning pin 60 Positioning portion 60A Front-back direction positioning portion 60B Vertical direction positioning portion 60C Left-right direction positioning portion 61 Projection 62 Groove 62A ... front inner surface, 62B... rear inner surface, 62C... bottom surface, 63... protrusion, AX... optical axis

Claims (10)

a light source;
a movable shade mechanism that controls light distribution from the light source;
a heat sink that supports the light source and the movable shade mechanism,
The movable shade mechanism includes a movable shade, a shaft that rotatably supports the movable shade, a bracket base portion that is fixed to the heat sink, and a support portion that is arranged above the bracket base portion and fixes the shaft. a bracket comprising;
The heat sink has a positioning portion that positions the shaft,
Vehicle headlight. The positioning portion has a groove portion arranged above the bracket base portion and supporting the shaft,
The vehicle headlamp according to claim 1. The positioning part includes a longitudinal direction positioning part that positions the shaft in the longitudinal direction,
The front-rear direction positioning portion includes a front inner surface of the groove portion that is arranged on the front side of the shaft and contacts the shaft, and a rear inner surface of the groove portion that is arranged on the rear side of the shaft and contacts the shaft. ,
The vehicle headlamp according to claim 2. The positioning part includes a vertical positioning part that positions the shaft in the vertical direction,
The vertical positioning portion includes a bottom surface of the groove portion disposed below the shaft and in contact with the shaft,
The vehicle headlamp according to claim 3. a reflector arranged above the bracket substrate and reflecting light from the light source;
The bracket has a fastening hole into which a screw is inserted, and a slit provided in a part of the periphery of the fastening hole,
With the bracket sandwiched between the reflector and the heat sink, the reflector, the bracket, and the heat sink are fixed by the screw.
The vehicle headlamp according to claim 4. The positioning part includes a vertical positioning part that positions the shaft in the vertical direction,
a reflector arranged above the bracket substrate and reflecting light from the light source;
The vertical positioning part includes a screw that fixes the reflector, the bracket, and the heat sink in a state in which the bracket is sandwiched between the reflector and the heat sink,
The vehicle headlamp according to claim 3. The positioning portion includes a horizontal direction positioning portion that positions the bracket in the horizontal direction,
The heat sink has a positioning pin,
The bracket has a positioning hole in which the positioning pin is arranged,
The left-right direction positioning portion includes a left inner surface of the positioning hole that is arranged on the left side of the positioning pin and contacts the positioning pin, and a right side of the positioning hole that is arranged on the right side of the positioning pin and contacts the positioning pin. including the inner surface and
The vehicle headlamp according to any one of claims 3 to 6. The positioning portion includes a horizontal direction positioning portion that positions the bracket in the horizontal direction,
The movable shade mechanism has a lateral position regulating portion that contacts at least a portion of the movable shade,
The left-right direction positioning portion includes a protrusion disposed above the bracket base portion and contacting the left-right position regulating portion to position the left-right position regulating portion in the left-right direction,
The vehicle headlamp according to claim 1. The positioning part includes a vertical positioning part that positions the shaft in the vertical direction,
a reflector arranged above the bracket substrate and reflecting light from the light source;
The vertical positioning part includes a screw that fixes the reflector, the bracket, and the heat sink in a state in which the bracket is sandwiched between the reflector and the heat sink,
The vehicle headlamp according to claim 8. The positioning part includes a longitudinal direction positioning part that positions the shaft in the longitudinal direction,
The heat sink has a positioning pin,
The bracket has a positioning hole in which the positioning pin is arranged,
The front-to-rear direction positioning portion includes a front inner surface of the positioning hole which is arranged forward of the positioning pin and contacts the positioning pin, and a positioning hole which is arranged rearward of the positioning pin and contacts the positioning pin. a posterior inner surface;
The vehicle headlamp according to claim 8 or 9.

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