JP7155357B2 - Vehicle lighting unit - Google Patents

Description

The present invention relates to a technical field of miniaturization of vehicle lamp units.

2. Description of the Related Art Vehicle headlamps include, for example, a lamp unit having a light source and the like arranged inside a lamp outer casing composed of a cover and a lamp housing.

2. Description of the Related Art Some vehicle headlamps are provided with a light amount control mechanism for controlling the amount of light emitted from a light source (see, for example, Patent Documents 1, 2, and 3).

The light amount control mechanism has a movable shade that changes the shielding amount of the light emitted from the light source and an actuator that operates the movable shade. In the vehicle headlights disclosed in Patent Documents 1 to 3, for example, the movable shade is rotated to the first position to switch to a low beam irradiation mode for illuminating short distances. When the movable shade is rotated to the second position, the illumination mode is switched to a high beam illumination mode for illuminating a long distance.

The light amount control mechanism is arranged by being supported or attached to predetermined parts such as a connecting plate, a fixed arm, a light source unit, and a lens holder.

Japanese Unexamined Patent Application Publication No. 2011-65960 JP 2011-119184 A JP 2010-3589 A

By the way, in a type having a lamp unit, such as the vehicle headlamps described in Patent Documents 1 to 3, a light amount control mechanism for controlling the shielding amount of the light projected by the projection lens behind the projection lens is provided. is provided.

Therefore, depending on the positional relationship between the projection lens and the light amount control mechanism, the overall length in the optical axis direction (front-rear direction) may become long, and the vehicle headlamp may become large.

SUMMARY OF THE INVENTION Accordingly, it is an object of the vehicle lamp unit of the present invention to overcome the above-described problems and reduce the size of the vehicle lamp unit.

In order to solve the above-described problems, a vehicle lighting unit includes a light source unit mounted with a light source and provided with a heat sink, a movable shade that switches the amount of shielding of light emitted from the light source, and a solenoid that operates the movable shade. and a projection lens for projecting forward the light emitted from the light source, wherein the rotating shaft of the movable shade and the output shaft of the solenoid are arranged to extend in the left-right direction. and the rotary shaft of the movable shade and the output shaft of the solenoid are arranged between the projection lens and the focal point of the projection lens.

Therefore, in the vehicle lamp unit, the rotating shaft of the movable shade and the output shaft of the solenoid are arranged to extend in the horizontal direction, and the movable shade is positioned between the projection lens and the focal point of the projection lens. and the output shaft of the solenoid are arranged.

A vehicle lamp unit of the present invention comprises: a light source unit mounted with a light source and provided with a heat sink; a light amount control mechanism having a movable shade for switching the amount of shielding of light emitted from the light source; and a solenoid for operating the movable shade. and a projection lens for projecting forward the light emitted from the light source, wherein the rotating shaft of the movable shade and the output shaft of the solenoid are arranged to extend in the left-right direction, respectively, and the projection lens and the The rotary shaft of the movable shade and the output shaft of the solenoid are arranged between the focal point of the projection lens.

Therefore, the rotating shaft of the movable shade and the output shaft of the solenoid are arranged to extend in the horizontal direction, respectively, and the rotating shaft of the movable shade and the output shaft of the solenoid are arranged between the projection lens and the focal point of the projection lens. Therefore, the size of the vehicle lamp unit can be reduced.

FIG. 2 to FIG. 8 show an embodiment and a comparative example of the vehicle lamp unit of the present invention, and this figure is a schematic longitudinal sectional view. 2 is an exploded perspective view of the lamp unit; FIG. It is a perspective view of a lens holder. FIG. 4 is a perspective view showing a state in which the light amount control mechanism is attached to the lens holder; FIG. 4 is an enlarged perspective view showing a state in which a movable shade is held at a first position; FIG. 11 is an enlarged perspective view showing a state in which the movable shade is held at a second position; FIG. 8 shows a lens holder and a light amount control mechanism according to a comparative example, and this figure is a perspective view showing a state before the light amount control mechanism is attached to the lens holder. FIG. 4 is a perspective view showing a state in which the light quantity control mechanism is attached to the lens holder;

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for implementing the vehicle lamp unit of the present invention will be described below with reference to the accompanying drawings.

The vehicle headlamps 1 are attached to the left and right ends of the front end of the vehicle body.

The vehicle headlamp 1 includes a lamp housing 2 having a recess opening forward and a cover 3 closing the opening of the lamp housing 2, as shown in FIG. A lamp housing 4 is formed by the lamp housing 2 and the cover 3 , and an internal space of the lamp housing 4 is formed as a lamp chamber 5 .

A mounting hole 2a is formed through the rear end portion of the lamp housing 2 in the front-rear direction. A back cover 6 is attached to the attachment hole 2a.

A lamp unit 7 is arranged in the lamp chamber 5 (see FIGS. 1 and 2). The lamp unit 7 includes a lens holder 8, a projection lens 9 attached to the front end of the lens holder 8, a reflector 10 for reflecting light, a light source unit 11 disposed below the reflector 10, and a light source unit 11 attached to the lower surface of the light source unit 11. and a cooling fan 12 .

The lens holder 8 has an arc-shaped lens mounting portion 13 penetrating in the front and rear direction, side portions 14 projecting rearward from both left and right end portions of the lens mounting portion 13, and holding portions provided between the side portions 14 and 14. 15 (see FIGS. 2 and 3).

The lens mounting portion 13 is formed in an arcuate shape with an opening downward.

The side portions 14, 14 are formed in a plate shape facing substantially in the horizontal direction.

The holding portion 15 includes a mounting surface portion 16 facing in the vertical direction, bearing portions 17, 17 provided at the front end portion of the mounting surface portion 16, and an actuator mounting portion 18 and the mounting surface portion 16 provided on the front side of the mounting surface portion 16. It has connecting protrusions 19, 19 protruding downward from the left and right ends of the housing.

The bearing portion 17 protrudes obliquely upward and forward from the mounting surface portion 16 .

In the actuator mounting portion 18, a receiving surface portion 20 facing in the front-rear direction, support protrusions 21 protruding forward from respective parts of the outer peripheral portion of the receiving surface portion 20, and protruding forward from the upper end portion of the receiving surface portion 20 are provided. An engaging protrusion 22 is provided. Positioning holes 20 a , 20 a , 20 a are formed in the receiving surface portion 20 . The support protrusions 21, 21 are provided to be separated from each other in the left and right direction.

The projection lens 9 is formed in a substantially hemispherical shape and is attached to the lens attachment portion 13 of the lens holder 8 (see FIGS. 1 and 2).

The reflector 10 has an inner surface formed as a reflecting surface 10a. The reflector 10 is attached to the top surface of the light source unit 11 .

The light source unit 11 has a circuit board 23 and a light source 24 mounted on the upper surface of the circuit board 23. As the light source 24, for example, a light emitting diode (LED) is used.

The light source unit 11 is provided with mounting pieces 11a, 11a projecting laterally (outward). The light source unit 11 is attached to the lens holder 8 by pressing the mounting pieces 11a, 11a against the connecting projections 19, 19 from behind, and connecting them to the connecting projections 19, 19 by screws or the like.

The light source unit 11 is provided with a heat sink 25 positioned below the circuit board 23 .

The cooling fan 12 is attached to the bottom surface of the heat sink 25 .

A portion of the light source unit 11 excluding the front end and the reflector 10 are arranged behind the focal point S of the projection lens 9 (see FIG. 1).

A light quantity control mechanism 26 is attached to the lens holder 8 from the front (see FIGS. 1, 2 and 4).

The light amount control mechanism 26 has an actuator 27 , a transmission body 28 and a movable shade 29 .

The actuator 27 has a yoke case 30, a coil body 31 arranged inside the yoke case 30, and an output shaft 32 which is movable in the left-right direction.

The yoke case 30 is horizontally long, the axial direction of the coil body 31 is horizontal, and the output shaft 32 is axially horizontal and partially protrudes laterally from the yoke case 30 . The yoke case 30 is provided with positioning projections 30a, 30a, 30a projecting rearward.

The transmission body 28 is connected to the end of the output shaft 32 protruding sideways from the yoke case 30 . The transmission body 28 comprises a supported portion 33 , a connecting portion 34 protruding downward from one side of the supported portion 33 , and a drive shaft 35 supported by the supported portion 33 .

The supported portion 33 is provided with a longitudinally extending shaft supporting portion 33a and laterally spaced bearing portions 33b, 33b projecting rearward. The supported portion 33 is provided with a spring engaging projection 33c on one side surface. The transmission body 28 is connected to the output shaft 32 at the lower end of the connecting portion 34 .

The drive shaft 35 is formed in the shape of a round shaft extending in the front-rear direction, and is rotatably supported by the shaft support portion 33a of the supported portion 33. As shown in FIG.

The actuator 27 is positioned by inserting the positioning projections 30a, 30a, and 30a into the positioning holes 20a, 20a, and 20a of the receiving surface portion 20, respectively, in a state where the transmission body 28 is connected to the output shaft 32. Attached by tightening or the like. At this time, the yoke case 30 is engaged with the engaging projection 22 and assembled to the actuator mounting portion 18 .

When the actuator 27 is assembled to the actuator mounting portion 18, the rotating shaft 39 is inserted into the bearing portions 33b, 33b of the transmitting body 28, and the transmitting body 28 and the rotating shaft 39 are connected. The transmission body 28 is movable in the axial direction of the rotary shaft 39 .

The movable shade 29 has a light amount control portion 29a formed in a substantially arcuate shape and connecting arm portions 29b, 29b projecting substantially downward from positions near both left and right ends of the light amount control portion 29a (see FIG. 5). and FIG. 6).

A driven portion 36 is provided on the movable shade 29. The driven portion 36 protrudes downward from the light amount control portion 29a and is positioned between the connecting arms 29b, 29b. A first sliding surface 37 and a second sliding surface 38 are formed on the lower end of the driven portion 36 so as to be separated from each other in the front-rear direction. is formed with a receiving recess 36a that opens substantially downward.

The first sliding surface 37 includes a planar first position-restricted surface 37a and a twisted surface 37b that twists and displaces downward as it separates laterally from the first position-restricted surface 37a. and a planar second position-restricted surface 37c located on the opposite side of the first position-restricted surface 37a across the 37b.

The second sliding surface 38 includes a planar first position-restricted surface 38a and a twisted surface 38b that twists and displaces upward as it separates laterally from the first position-restricted surface 38a. It consists of a planar second position-restricted surface 38c located on the opposite side of the first position-restricted surface 38a with the 38b interposed therebetween.

The first position-restricted surface 38a of the second sliding surface 38 is located directly behind the second position-restricted surface 37c of the first sliding surface 37, The position-restricted surface 38 c is located directly behind the first position-restricted surface 37 a of the first sliding surface 37 .

A rotating shaft 39 extending in the left-right direction is connected to the connecting arm portions 29b, 29b of the movable shade 29. As shown in FIG. When the movable shade 29 is connected to the rotating shaft 39 , the rotating shaft 39 is inserted into the receiving recess 36 a so that the first sliding surface 37 and the second sliding surface 38 are connected to the driving shaft 35 of the transmission body 28 . contact from above.

The rotating shaft 39 is assembled to the bearings 17 , 17 of the holding portion 15 .

The movable shade 29 is rotated about a rotary shaft 39 between a first position where a part of the light emitted from the light source 24 is blocked and a second position where the amount of blocking is smaller than that of the first position. be. The first position is the position of the low beam for illuminating short distances, and the light quantity control portion 29a of the movable shade 29 is in a substantially vertical state. The light quantity control section 29a is in a tilted state.

An urging spring 40 , which is, for example, a compression coil spring, is supported on the rotating shaft 39 so as to be fitted on the rotating shaft 39 .

One end of the urging spring 40 is engaged with the lower surface of the light quantity control portion 29a of the movable shade 29, and the other end is engaged with the spring engagement protrusion 33c provided on the supported portion 33 of the transmission body . Accordingly, the movable shade 29 is urged by the urging spring 40 in the direction of being rotated from the second position to the first position.

When the rotating shaft 39 is inserted into the bearings 33b, 33b of the transmission body 28, both ends of the urging spring 40 are connected to one connecting arm part 29b of the movable shade 29 and one bearing part of the transmission body 28, respectively. 33b is in a compressed state. Therefore, the output shaft 32 of the actuator 27 is urged by the urging spring 40 via the transmission body 28 in the direction of protruding from the yoke case 30 .

The first and second sliding surfaces 38 of the movable shade 29 are in contact with the drive shaft 35 of the transmission body 28 from above. At this time, when the movable shade 29 is rotated to the first position, the drive shaft 35 is positioned between the first position regulated surface 37 a of the first sliding surface 37 and the second position regulated surface 37 a of the second sliding surface 38 . is in contact with the position regulated surface 38c. Further, when the movable shade 29 is rotated to the second position, the drive shaft 35 moves the second position regulated surface 37c of the first sliding surface 37 and the second position regulating surface 37c of the second sliding surface 38. is in contact with the position regulated surface 38a.

The light amount control mechanism 26 configured as described above is arranged between the projection lens 9 and the focal point S of the projection lens 9 (see FIG. 1).

The lamp unit 7 is tiltably supported by the lamp housing 2 via an aiming adjustment mechanism (not shown). Therefore, the lighting unit 7 is tilted vertically or horizontally by the operation of the aiming adjustment mechanism, and the optical axis adjustment (initial adjustment) of the light source 24 is performed.

Further, the lamp unit 7 may be supported by the lamp housing 2 so as to be vertically tiltable. When the lamp unit 7 is supported by the lamp housing 2 so as to be vertically tiltable, a leveling adjustment mechanism (not shown) is connected to the lamp unit 7, and the lamp unit 7 is vertically tilted by the operation of the leveling adjustment mechanism. , the direction of the optical axis of the light source 24 is adjusted according to the weight of the vehicle.

Furthermore, the lamp unit 7 may be rotatable in the horizontal direction, for example. When the lighting unit 7 is rotatable in the horizontal direction, a swivel mechanism (not shown) is connected to the lighting unit 7, and the operation of the swivel mechanism causes the lighting unit 7 to rotate in the horizontal direction, thereby moving the vehicle in the running direction. , the direction of the optical axis is changed.

In the vehicle headlamp 1 configured as described above, the output shaft 32 is protruded from the yoke case 30 by the biasing force of the biasing spring 40 when the coil body 31 of the actuator 27 is not supplied with the drive current. is positioned at the end of movement in the direction of At this time, no turning force is applied to the movable shade 29 in the direction from the first position to the second position. A spring 40 presses the first position regulated surface 37a of the first sliding surface 37 against the drive shaft 35 of the transmission body 28 from above to hold it at the first position (see FIG. 5). At the first position, the second position regulated surface 38 c of the second sliding surface 38 is in contact with the drive shaft 35 .

When light is emitted from the light source 24 with the movable shade 29 at the first position, part of the light is blocked by the movable shade 29, and the unblocked light enters the projection lens 9. Light is projected by 9 to form a low-beam light distribution pattern that illuminates a short distance.

When the coil body 31 of the actuator 27 is energized, the output shaft 32 is moved in the direction of being pulled into the yoke case 30, and the transmission body 28 is moved rightward as the output shaft 32 moves. When the transmission body 28 is moved rightward, the drive shaft 35 slides on the first sliding surface 37 from the twisted surface 37b to the second position regulated surface 37c, and the movable shade 29 moves from the first position to the second position. 2 position (see FIG. 6). At this time, the drive shaft 35 slides on the twisted surface 38b of the second sliding surface 38 and the first position regulated surface 38a. The movable shade 29 is held at the second position by pressing the second position regulated surface 37c of the first sliding surface 37 against the drive shaft 35 from above by the biasing spring 40 .

By rotating the movable shade 29 to the second position, the shielding amount of the light emitted from the light source 24 is reduced, and a high beam light distribution pattern for illuminating a long distance is formed.

When the coil body 31 is de-energized, the biasing force of the biasing spring 40 causes the output shaft 32 to move in the direction in which it protrudes from the yoke case 30, and the transmission body 28 moves leftward along with the movement of the output shaft 32. be moved. When the transmission body 28 is moved leftward, the drive shaft 35 slides on the first sliding surface 37 from the twisted surface 37b to the first position regulated surface 37a, and the movable shade 29 moves from the second position to the first position. It is rotated to position 1 (see FIG. 5). At this time, the drive shaft 35 slides on the twisted surface 38b of the second sliding surface 38 and the second position-restricted surface 38c. The movable shade 29 is again held at the first position by pressing the first position regulated surface 37a of the first sliding surface 37 against the drive shaft 35 from above by the biasing spring 40 .

As described above, the vehicle headlamp 1 having the light amount control mechanism 26 is configured such that the output shaft 32 of the actuator 27 is moved laterally to rotate the movable shade 29 .

Therefore, the size of the actuator 27 in the front-rear direction can be small, and the size of the vehicle headlamp 1 in the front-rear direction can be reduced.

A comparative example of the lens holder and the light amount control mechanism will be described below (see FIGS. 7 and 8).

The lens holder 8A according to the comparative example has a circular lens mounting portion 43 penetrating in the front and rear direction, and side portions 44, 44 protruding rearward from the left and right end portions of the lens mounting portion 43, respectively, and provided between the side portions 44, 44. and a holding portion 45 that is attached.

The side portions 44, 44 are each formed in a plate-like shape facing substantially in the horizontal direction.

The holding portion 45 includes a mounting surface portion 46 facing in the vertical direction, bearing portions 47 provided at the front end portion of the mounting surface portion 46, and an actuator mounting portion 48 provided at the front end side of the mounting surface portion 46 and the mounting surface portion. 46 has connecting protrusions 49, 49 protruding downward from both left and right ends thereof.

A spring support protrusion 46 a is provided on the upper surface of the mounting surface portion 46 .

The bearing portion 47 protrudes upward from the mounting surface portion 46 .

The actuator mounting portion 48 has a receiving surface portion 50 facing in the front-rear direction, a supporting projection 51 projecting forward from the lower end of the receiving surface 50, and engaging projections projecting upward from both left and right ends of the supporting projection 51, respectively. 52, 52 are provided. Positioning holes 51 a , 51 a , 51 a are formed in the support protrusion 51 .

The light source unit 11 is attached to the lens holder 8A by pressing the mounting pieces 11a, 11a against the connecting projections 49, 49 from behind, and connecting them to the connecting projections 49, 49 by screwing or the like.

A light quantity control mechanism 56 is assembled to the lens holder 8A from above.

A portion of the light source unit 11 excluding the front end and the reflector 10 are arranged behind the focal point S of the projection lens 9 .

The light amount control mechanism 56 has an actuator 57 , a transmission member 58 and a movable shade 59 .

The actuator 57 has a yoke case 60, a coil body 61 arranged inside the yoke case 60, and an output shaft 62 movable in the front-rear direction.

The axial direction of the coil body 61 is oriented forward and backward, and the output shaft 62 is oriented axially forward and backward, and a portion of the output shaft 62 protrudes forward from the yoke case 60 . The yoke case 60 is provided with downwardly projecting positioning projections 60a, 60a, 60a.

The transmission member 58 is, for example, a wire-shaped member, and has one end connected to the end of the output shaft 62 protruding forward from the yoke case 60 .

With the transmission member 58 connected to the output shaft 62, the actuator 57 is positioned by inserting the positioning projections 60a, 60a, 60a into the positioning holes 51a, 51a, 51a of the support projection 51, respectively. It is attached by caulking or the like. At this time, both side surfaces of the yoke case 60 are engaged with the engaging protrusions 52, 52, respectively, and assembled to the actuator mounting portion 48. As shown in FIG.

When the actuator 57 is assembled to the actuator mounting portion 48, the other end of the transmission member 58 is connected to the connection protrusion 59c, and the transmission member 58 and the movable shade 59 are connected.

The movable shade 59 includes a light amount control portion 59a formed in a substantially arcuate shape, connecting arm portions 59b, 59b protruding substantially downward from positions near the left and right ends of the light amount control portion 59a, and the light amount control portion 59a in the left-right direction. and a connecting protrusion 59c protruding substantially downward from the substantially central portion. The other end of the transmission member 58 is connected to the connecting protrusion 59c of the movable shade 59. As shown in FIG.

A rotating shaft 63 extending in the left-right direction is connected to the connecting arm portions 59b, 59b of the movable shade 59. As shown in FIG.

The rotating shaft 63 is assembled to the bearings 47 and 47 of the holding portion 45 .

The movable shade 59 is rotated about a rotation shaft 63 between a first position where a part of the light emitted from the light source 24 is blocked and a second position where the amount of blocking is smaller than that of the first position. be. The first position is the position of the low beam for illuminating short distances, and the light amount control portion 59a of the movable shade 59 is in a substantially vertical state. The light amount control portion 59a is tilted.

An urging spring 64 , which is, for example, a coil spring, is supported on the rotating shaft 63 so as to be fitted on the rotating shaft 63 .

One end of the urging spring 64 is engaged with the lower surface of the light amount control portion 59a of the movable shade 59, and the other end is engaged with the spring supporting protrusion 46a provided on the mounting surface portion 46 of the lens holder 8A. Accordingly, the movable shade 59 is urged by the urging spring 64 in the direction of being rotated from the second position to the first position.

When the transmission member 58 is connected to the movable shade 59, the biasing spring 64 biases the movable shade 59 from the second position to the first position. The biasing force of the force spring 64 is transmitted to the output shaft 62 of the actuator 57 via the transmission member 58 , and the output shaft 62 is biased in the direction of protruding from the yoke case 60 .

The light amount control mechanism 56 configured as described above is arranged between the projection lens 9 and the focal point S of the projection lens 9 .

In the vehicle headlamp 1 having the lens holder 8A and the light amount control mechanism 56 configured as described above, the output shaft 62 is connected to the biasing spring 64 when the coil body 61 of the actuator 57 is not supplied with the drive current. is positioned at the end of movement in the direction in which it protrudes from the yoke case 60 by the biasing force of . At this time, the movable shade 59 is not applied with a turning force in the direction from the first position to the second position, and the movable shade 59 is held at the first position by the urging spring 64 .

When light is emitted from the light source 24 while the movable shade 59 is at the first position, part of the light is blocked by the movable shade 59, and the unblocked light is incident on the projection lens 9. Light is projected by 9 to form a low-beam light distribution pattern that illuminates a short distance.

When the coil body 61 of the actuator 57 is energized, the output shaft 62 is moved in the direction of being pulled into the yoke case 60, and the transmission member 58 is moved rearward as the output shaft 62 moves. When the transmission member 58 is moved rearward, the movable shade 59 is rotated from the first position to the second position against the biasing force of the biasing spring 64 .

By rotating the movable shade 59 to the second position, the shielding amount of the light emitted from the light source 24 is reduced, and a high beam light distribution pattern for illuminating a long distance is formed.

When the coil body 61 is de-energized, the biasing force of the biasing spring 64 moves the output shaft 62 in a direction projecting from the yoke case 60 , and the transmission member 58 moves forward along with the movement of the output shaft 62 . be done. When the transmission member 58 is moved forward, the biasing force of the biasing spring 64 causes the movable shade 59 to rotate from the second position to the first position and is held at the first position again.

As described above, the vehicle headlamp 1 having the light amount control mechanism 56 is configured such that the output shaft 62 of the actuator 57 is moved in the front-rear direction to rotate the movable shade 59 .

Therefore, since the rotating direction of the movable shade 59 and the moving direction of the output shaft are the same, there is no need to provide an orthogonal conversion mechanism for rotating the movable shade 59 in the light amount control mechanism 26, and the number of components can be reduced accordingly. The mechanism can be simplified by reducing the number of points.

As described above, in the vehicle headlamp 1 , the light amount control mechanisms 26 and 56 are arranged between the projection lens 9 and the focal point S of the projection lens 9 .

Accordingly, the positional relationship between the projection lens 9 and the light quantity control mechanisms 26, 56 is taken into consideration, and the light quantity control mechanisms 26, 56 are arranged close to the projection lens 9, thereby shortening the overall length in the optical axis direction (front-rear direction). Therefore, the size of the vehicle headlamp 1 can be reduced.

In addition, since the portion of the light source unit 11 excluding the front end portion and the reflector 10 are arranged behind the focal point of the projection lens 9, the light amount control mechanism 26, the light source unit 11 and the reflector 10 do not interfere with each other, and proper operation is ensured. In addition, the light emitted from the light source 24 can form a desired light distribution pattern.

Furthermore, since the light source unit 11 is arranged below the reflector 10, the size of the vehicle headlamp 1 can be reduced in the front-rear direction.

Although the vehicle headlamp 1 having the reflector 10 has been described above as an example, the present invention can also be applied to a so-called direct-type vehicle headlamp that does not have a reflector. .

The shapes and structures of the respective parts shown in the above-described modes for carrying out the invention are only examples of specific embodiments carried out when carrying out the present invention, and the technical scope of the present invention is limited by these. It should not be interpreted restrictively.

7... Lamp unit (vehicle lamp unit) 9... Projection lens 11... Light source unit 24... Light source 25... Heat sink 26... Light amount control mechanism 29... Movable shade 31... Coil body (solenoid) 32... output shaft, 39... rotation axis, S... focus of projection lens

Claims (3)

a light source unit including a heat sink and a light source mounted on an upper side of the heat sink with a light emitting surface facing upward;
a reflector disposed above the light source unit and reflecting forward the light emitted from the light source;
a projection lens that projects the light reflected by the reflector;
a movable shade that switches the shielding amount of the light reflected by the reflector;
an actuator for rotating the movable shade about its rotation axis, the actuator having an output shaft that moves in the left-right direction or the front-rear direction and arranged between the projection lens and the heat sink;
a transmission body that transmits the motion of the output shaft of the actuator to the movable shade to rotate the movable shade about the rotation shaft;
The movable shade has a bearing portion assembled from the front to support the movable shade with the rotating shaft of the movable shade extending in the left-right direction, and a receiving surface portion facing in the front-rear direction, the receiving surface portion comprising: a holding part that holds the actuator;
with
The vehicular lamp unit, wherein the rotating shaft of the movable shade is sandwiched from the front-rear direction by a bearing portion provided on the transmission body and the bearing portion of the holding portion. 2. The vehicle lamp unit according to claim 1, wherein the heat sink and the cooling fan are arranged side by side in the vertical direction, and the cooling fan is arranged so as to be accommodated below the heat sink. 3. The vehicle lamp unit according to claim 1, wherein the light amount control mechanism including the actuator, the movable shade, and the transmission body is arranged between the projection lens and a focal point of the projection lens. .

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