JP7596501B2 - Vehicle lighting unit - Google Patents

Description

The present invention relates to the technical field of miniaturizing vehicle lighting units.

For example, some vehicle headlamps have a lamp unit with a light source etc. arranged inside a lamp outer casing formed by a cover and a lamp housing.

Some vehicle headlamp lighting units are provided with a light amount control mechanism that controls the amount of light emitted from the light source (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

The light quantity control mechanism has a movable shade that changes the amount of light shading emitted from the light source, and an actuator that operates the movable shade. In the vehicle headlamp described in Patent Documents 1 to 3, for example, the movable shade is rotated to a first position to switch to a low beam irradiation mode that illuminates a short distance, and the movable shade is rotated to a second position to switch to a high beam irradiation mode that illuminates a long distance.

The light quantity control mechanism is supported or attached to specific parts such as the connecting plate, fixed arm, light source unit, and lens holder.

JP 2011-65960 A JP 2011-119184 A JP 2010-3589 A

However, in types of vehicle headlamps that have a lighting unit, such as those described in Patent Documents 1 to 3, a light amount control mechanism is provided behind the projection lens to control the amount of light blocked by the projection lens.

Therefore, depending on the relative positions of the projection lens and the light quantity control mechanism, the overall length in the optical axis direction (front-to-rear direction) may become long, which may result in the vehicle headlamp becoming large.

The objective of the vehicle lighting unit of the present invention is to overcome the above problems and to reduce the size of the vehicle lighting unit.

To solve the above-mentioned problems, the vehicle lighting unit includes a light source unit having a light source mounted thereon and a heat sink, a light amount control mechanism having a movable shade that switches the amount of blocking of light emitted from the light source and a solenoid that operates the movable shade, and a projection lens that projects the light emitted from the light source forward, with the rotation axis of the movable shade and the output axis of the solenoid each arranged to extend in the left-right direction, and the rotation axis of the movable shade and the output axis of the solenoid arranged between the projection lens and the focal point of the projection lens.

Therefore, in a vehicle lighting unit, the rotation shaft of the movable shade and the output shaft of the solenoid are arranged to extend in the left-right direction, and the rotation 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.

The vehicle lamp unit of the present invention comprises a light source unit having a light source mounted thereon and a heat sink provided thereon, a light quantity control mechanism having a movable shade that switches the amount of blocking of light emitted from the light source and a solenoid that operates the movable shade, and a projection lens that projects the light emitted from the light source forward, characterized in that the rotation axis of the movable shade and the output axis of the solenoid are disposed so as to extend in the left-right direction, and the rotation axis of the movable shade and the output axis of the solenoid are disposed between the projection lens and the focal point of the projection lens.

As a result, the pivot shaft of the movable shade and the output shaft of the solenoid are positioned to extend in the left-right direction, and the pivot shaft of the movable shade and the output shaft of the solenoid are positioned between the projection lens and the focal point of the projection lens, making it possible to reduce the size of the vehicle lighting unit.

2 to 8 show an embodiment of the vehicle lamp unit of the present invention and a comparative example, and these figures are schematic vertical sectional views. FIG. FIG. 2 is a perspective view of a lens holder. FIG. 2 is a perspective view showing a state in which a light amount control mechanism is attached to a lens holder. FIG. 4 is an enlarged perspective view showing a state in which the movable shade is held at a first position. FIG. 4 is an enlarged perspective view showing a state in which the movable shade is held in a second position. FIG. 10 shows a lens holder and a light amount control mechanism according to a comparative example together with FIG. 8, and is a perspective view showing a state before the light amount control mechanism is assembled to the lens holder. FIG. 4 is a perspective view showing a state in which the light amount control mechanism is attached to the lens holder.

Below, we will explain the embodiment of the vehicle lighting unit of the present invention with reference to the attached drawings.

The vehicle headlights 1 are mounted on both the left and right ends of the front end of the vehicle body.

As shown in FIG. 1, the vehicle headlamp 1 comprises a lamp housing 2 having a recess that opens forward, and a cover 3 that closes the opening of the lamp housing 2. The lamp housing 2 and the cover 3 form a lamp outer case 4, and the internal space of the lamp outer case 4 is formed as a lamp chamber 5.

A mounting hole 2a is formed at the rear end of the lamp housing 2, penetrating from front to rear. A back cover 6 is attached to the mounting hole 2a.

A lamp unit 7 is disposed in the lamp chamber 5 (see Figures 1 and 2). The lamp unit 7 has a lens holder 8, a projection lens 9 attached to the front end of the lens holder 8, a reflector 10 that reflects light, a light source unit 11 disposed below the reflector 10, and a cooling fan 12 attached to the underside of the light source unit 11.

The lens holder 8 has an arc-shaped lens mounting portion 13 that penetrates from front to back, side portions 14, 14 that protrude rearward from both the left and right ends of the lens mounting portion 13, and a holding portion 15 provided between the side portions 14, 14 (see Figures 2 and 3).

The lens mounting section 13 is formed in an arc shape that opens downward.

The side portions 14, 14 are formed into plates facing approximately left and right.

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

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

The actuator mounting portion 18 is provided with a receiving surface portion 20 facing the front-rear direction, support protrusions 21, 21 protruding forward from each part of the outer periphery of the receiving surface portion 20, and an engagement protrusion 22 protruding forward from the upper end portion of the receiving surface portion 20. Positioning holes 20a, 20a, 20a are formed in the receiving surface portion 20. The support protrusions 21, 21 are provided spaced apart on the left and right.

The projection lens 9 is formed in an approximately hemispherical shape and is attached to the lens mounting portion 13 of the lens holder 8 (see Figures 1 and 2).

The inner surface of the reflector 10 is formed as a reflective surface 10a. The reflector 10 is attached to the upper 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. The light source 24 is, for example, a light-emitting diode (LED).

The light source unit 11 is provided with attachment pieces 11a, 11a that protrude to the side (outward). The attachment pieces 11a, 11a of the light source unit 11 are pressed against the coupling protrusions 19, 19 from behind, and are coupled to the coupling protrusions 19, 19 by screws or the like, and are attached to the lens holder 8.

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

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

The light source unit 11, except for its front end, and the reflector 10 are located behind the focal point S of the projection lens 9 (see Figure 1).

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

The light control mechanism 26 has an actuator 27, a transmitter 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 that can move left and right.

The yoke case 30 is in a horizontal position, the coil body 31 has an axial direction in the left-right direction, and the output shaft 32 has an axial direction in the left-right direction, with a portion of it protruding to the side from the yoke case 30. The yoke case 30 is provided with positioning protrusions 30a, 30a, 30a that protrude rearward.

The transmission body 28 is connected to the end of the output shaft 32 that protrudes laterally from the yoke case 30. The transmission body 28 consists of a supported part 33, a connecting part 34 that protrudes downward from one side of the supported part 33, and a drive shaft 35 that is supported by the supported part 33.

The supported portion 33 is provided with a shaft support portion 33a extending forward and backward, and bearing portions 33b, 33b spaced apart on the left and right sides and each protruding rearward. A spring engagement protrusion 33c is provided on one side of the supported portion 33. The lower end of the connecting portion 34 of the transmission body 28 is connected to the output shaft 32.

The drive shaft 35 is formed in a round shaft shape that extends in the front-rear direction and is supported rotatably by the shaft support portion 33a of the supported portion 33.

With the transmission body 28 connected to the output shaft 32, the actuator 27 is positioned by inserting the positioning protrusions 30a, 30a, 30a into the positioning holes 20a, 20a, 20a of the receiving surface portion 20, and is attached to the receiving surface portion 20 by crimping or the like. At this time, the yoke case 30 is engaged with the engagement protrusions 22 and assembled to the actuator mounting portion 18.

When the actuator 27 is attached to the actuator mounting portion 18, the rotation shaft 39 is inserted into the bearings 33b, 33b of the transmission body 28, and the transmission body 28 and the rotation shaft 39 are connected. The transmission body 28 is movable in the axial direction of the rotation shaft 39.

The movable shade 29 has a light quantity control section 29a formed in a substantially arcuate surface and connecting arms 29b, 29b that protrude substantially downward from positions near both the left and right ends of the light quantity control section 29a (see Figures 5 and 6).

The movable shade 29 is provided with a driven part 36, which protrudes downward from the light quantity control part 29a and is positioned between the connecting arms 29b, 29b. A first sliding surface 37 and a second sliding surface 38 are formed at the lower end of the driven part 36, spaced apart from each other in the front and rear directions, and a receiving recess 36a that opens substantially downward is formed between the first sliding surface 37 and the second sliding surface 38.

The first sliding surface 37 is composed of a first positionally restricted surface 37a formed in a planar shape, a twisted surface 37b which displaces downward while twisting as it moves away from the first positionally restricted surface 37a, and a planar second positionally restricted surface 37c which is positioned on the opposite side of the first positionally restricted surface 37a across the twisted surface 37b.

The second sliding surface 38 is composed of a first positionally restricted surface 38a formed in a planar shape, a twisted surface 38b which displaces upward while twisting as it moves away from the first positionally restricted surface 38a to the side, and a planar second positionally restricted surface 38c which is positioned on the opposite side of the first positionally restricted surface 38a across the twisted surface 38b.

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

A pivot shaft 39 extending in the left-right direction is connected to the connecting arms 29b, 29b of the movable shade 29. When the movable shade 29 is connected to the pivot shaft 39, the pivot shaft 39 is inserted into the receiving recess 36a, and the first sliding surface 37 and the second sliding surface 38 contact the drive shaft 35 of the transmission body 28 from above.

The pivot shaft 39 is attached to the bearing portions 17, 17 of the holding portion 15.

The movable shade 29 is rotated about a pivot 39 between a first position where it blocks a portion of the light emitted from the light source 24 and a second position where it blocks less light than the first position. The first position is a low beam position that illuminates a short distance and the light quantity control unit 29a of the movable shade 29 is in a substantially vertical state, and the second position is a high beam position that illuminates a long distance and the light quantity control unit 29a of the movable shade 29 is in a tilted state.

A biasing spring 40, for example a compression coil spring, is supported on the outside of the pivot shaft 39.

One end of the biasing spring 40 engages with the underside of the light quantity control section 29a of the movable shade 29, and the other end engages with the spring engagement protrusion 33c provided on the supported section 33 of the transmission body 28. Therefore, the movable shade 29 is biased by the biasing spring 40 in a direction to rotate 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 biasing spring 40 are compressed between one connecting arm 29b of the movable shade 29 and one bearing 33b of the transmission body 28. Therefore, the output shaft 32 of the actuator 27 is biased by the biasing spring 40 via the transmission body 28 in the direction in which it protrudes from the yoke case 30.

The first and second sliding surfaces 38 of the movable shade 29 contact 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 first position-restricted surface 37a of the first sliding surface 37 and the second position-restricted surface 38c of the second sliding surface 38 contact the drive shaft 35. Also, when the movable shade 29 is rotated to the second position, the second position-restricted surface 37c of the first sliding surface 37 and the second position-restricted surface 38a of the second sliding surface 38 contact the drive shaft 35.

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

The lamp unit 7 is supported on the lamp housing 2 so that it can be tilted freely via an aiming adjustment mechanism (not shown). Therefore, the operation of the aiming adjustment mechanism tilts the lamp unit 7 in the vertical or horizontal direction, and the optical axis of the light source 24 is adjusted (initial adjustment).

The lamp unit 7 may also be supported by the lamp housing 2 so that it can tilt up and down, for example. When the lamp unit 7 is supported by the lamp housing 2 so that it can tilt up and down, a leveling adjustment mechanism (not shown) is connected to the lamp unit 7, and the lamp unit 7 is tilted up and down by the operation of the leveling adjustment mechanism, and the direction of the optical axis of the light source 24 is adjusted according to the weight of the vehicle load.

Furthermore, the lamp unit 7 may be made rotatable, for example, horizontally. When the lamp unit 7 is made rotatable horizontally, a swivel mechanism (not shown) is connected to the lamp unit 7, and the lamp unit 7 is rotated horizontally by the operation of the swivel mechanism, changing the direction of the light axis to follow the traveling direction of the vehicle.

In the vehicle headlamp 1 configured as described above, when no drive current is supplied to the coil body 31 of the actuator 27, the output shaft 32 is positioned at the end of its movement in the direction in which it protrudes from the yoke case 30 by the biasing force of the biasing spring 40. At this time, no rotational force is applied to the movable shade 29 in the direction from the first position to the second position, the transmission body 28 is positioned at the left end of its movement, and the first position-restricted surface 37a of the first sliding surface 37 is pressed from above against the drive shaft 35 of the transmission body 28 by the biasing spring 40, and the movable shade 29 is held in the first position (see FIG. 5). In the first position, the second position-restricted surface 38c of the second sliding surface 38 is in contact with the drive shaft 35.

When the movable shade 29 is in the first position and light is emitted from the light source 24, a portion of the light is blocked by the movable shade 29, and the unblocked light is incident on the projection lens 9, which projects the light to form a low-beam light distribution pattern that illuminates a short distance.

When electricity is applied to the coil body 31 of the actuator 27, the output shaft 32 is moved in a direction in which it is drawn into the yoke case 30, and the transmission body 28 is moved to the right in conjunction with the movement of the output shaft 32. When the transmission body 28 is moved to the right, the drive shaft 35 is slid on the first sliding surface 37 from the twisted surface 37b to the second position-restricted surface 37c, and the movable shade 29 is rotated from the first position to the second position (see FIG. 6). At this time, the drive shaft 35 is slid on the twisted surface 38b and the first position-restricted surface 38a of the second sliding surface 38. The second position-restricted surface 37c of the first sliding surface 37 is pressed from above against the drive shaft 35 by the biasing spring 40, and the movable shade 29 is held in the second position.

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

When the current to the coil body 31 is stopped, the output shaft 32 is moved in a direction protruding from the yoke case 30 by the biasing force of the biasing spring 40, and the transmission body 28 is moved to the left along with the movement of the output shaft 32. When the transmission body 28 is moved to the left, the drive shaft 35 is slid on the first sliding surface 37 from the twisted surface 37b to the first position-restricted surface 37a, and the movable shade 29 is rotated from the second position to the first position (see FIG. 5). At this time, the drive shaft 35 is slid on the twisted surface 38b and the second position-restricted surface 38c of the second sliding surface 38. The first position-restricted surface 37a of the first sliding surface 37 is pressed from above against the drive shaft 35 by the biasing spring 40, and the movable shade 29 is held in the first position again.

As described above, in the vehicle headlamp 1 having the light quantity control mechanism 26, the output shaft 32 of the actuator 27 is moved left and right to rotate the movable shade 29.

As a result, the actuator 27 can be small in size in the fore-aft direction, making it possible to reduce the size of the vehicle headlamp 1 in the fore-aft direction.

Below, we explain a comparative example of a lens holder and a light quantity control mechanism (see Figures 7 and 8).

The lens holder 8A in the comparative example has a circular lens mounting portion 43 that penetrates from front to back, side portions 44, 44 that protrude rearward from both the left and right ends of the lens mounting portion 43, and a holding portion 45 provided between the side portions 44, 44.

The side portions 44, 44 are each formed into a plate shape facing approximately left and right.

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

A spring support protrusion 46a 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 is provided with a receiving surface portion 50 facing the front-rear direction, a support protrusion 51 protruding forward from the lower end of the receiving surface portion 50, and engagement protrusions 52, 52 protruding upward from both the left and right ends of the support protrusion 51. Positioning holes 51a, 51a, 51a 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 protrusions 49, 49 from behind and connecting them to the connecting protrusions 49, 49 by screws or the like.

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

The light source unit 11, except for its front end, and the reflector 10 are positioned behind the focal point S of the projection lens 9.

The light quantity 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 that can move in the forward and backward directions.

The coil body 61 has an axial direction extending in the front-rear direction, and the output shaft 62 has an axial direction extending in the front-rear direction, with a portion of it protruding forward from the yoke case 60. The yoke case 60 is provided with positioning protrusions 60a, 60a, 60a that protrude downward.

The transmission member 58 is, for example, a wire-like member, one end of which is connected to the end of the output shaft 62 that protrudes 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 protrusions 60a, 60a, 60a into the positioning holes 51a, 51a, 51a of the support protrusion 51, and is attached to the support protrusion 51 by crimping or the like. At this time, both side surfaces of the yoke case 60 are engaged with the engagement protrusions 52, 52, respectively, and assembled to the actuator mounting portion 48.

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

The movable shade 59 has a light quantity control section 59a formed in a substantially arcuate shape, connecting arms 59b, 59b protruding substantially downward from positions near both the left and right ends of the light quantity control section 59a, and a connecting protrusion 59c protruding substantially downward from approximately the center in the left-right direction of the light quantity control section 59a. The other end of the transmission member 58 is connected to the connecting protrusion 59c of the movable shade 59.

A pivot shaft 63 extending in the left-right direction is connected to the connecting arms 59b, 59b of the movable shade 59.

The pivot shaft 63 is attached to the bearing portions 47, 47 of the holding portion 45.

The movable shade 59 is rotated about a pivot 63 between a first position where it blocks a portion of the light emitted from the light source 24 and a second position where it blocks less light than the first position. The first position is a low beam position that illuminates a short distance, and the light quantity control unit 59a of the movable shade 59 is in a substantially vertical state, and the second position is a high beam position that illuminates a long distance, and the light quantity control unit 59a of the movable shade 59 is tilted.

A biasing spring 64, for example a coil spring, is supported on the outside of the pivot shaft 63.

One end of the biasing spring 64 engages with the underside of the light amount control section 59a of the movable shade 59, and the other end engages with the spring support protrusion 46a provided on the mounting surface section 46 of the lens holder 8A. Therefore, the movable shade 59 is biased by the biasing spring 64 in a direction to rotate from the second position to the first position.

When the transmission member 58 is connected to the movable shade 59, the spring 64 urges the movable shade 59 in a direction that rotates it from the second position to the first position, so that the force of the spring 64 is transmitted to the output shaft 62 of the actuator 57 via the transmission member 58, and the output shaft 62 is urged in a direction that protrudes from the yoke case 60.

The light quantity control mechanism 56 configured as described above is disposed 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 light quantity control mechanism 56 configured as described above, when no drive current is supplied to the coil body 61 of the actuator 57, the output shaft 62 is positioned at the moving end in the direction in which it protrudes from the yoke case 60 by the biasing force of the biasing spring 64. At this time, no rotational force is applied to the movable shade 59 in the direction from the first position to the second position, and the movable shade 59 is held in the first position by the biasing spring 64.

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

When electricity is applied to the coil body 61 of the actuator 57, the output shaft 62 is moved in a direction in which it is pulled into the yoke case 60, and the transmission member 58 is moved rearward in conjunction with the movement of the output shaft 62. 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 amount of light emitted from the light source 24 that is blocked is reduced, and a high beam light distribution pattern that illuminates a long distance is formed.

When the current to the coil body 61 is stopped, the biasing force of the biasing spring 64 moves the output shaft 62 in a direction protruding from the yoke case 60, and the transmission member 58 moves forward in conjunction with the movement of the output shaft 62. When the transmission member 58 moves forward, the biasing force of the biasing spring 64 rotates the movable shade 59 from the second position to the first position, and it is held in the first position again.

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

As a result, the rotation direction of the movable shade 59 and the movement direction of the output shaft are the same, so there is no need to provide an orthogonal conversion mechanism in the light quantity control mechanism 26 to rotate the movable shade 59, and the mechanism can be simplified by reducing the number of parts.

As described above, in the vehicle headlamp 1, the light quantity control mechanism 26, 56 is disposed between the projection lens 9 and the focal point S of the projection lens 9.

Therefore, 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 positioned close to the projection lens 9, shortening the overall length in the optical axis direction (front-rear direction), making it possible to miniaturize the vehicle headlamp 1.

In addition, because the light source unit 11 (excluding its front end) and the reflector 10 are positioned behind the focal point of the projection lens 9, the light quantity control mechanism 26 does not interfere with the light source unit 11 and the reflector 10, ensuring proper operation and allowing the light emitted from the light source 24 to form a desired light distribution pattern.

Furthermore, since the light source unit 11 is disposed below the reflector 10, the vehicle headlamp 1 can be made smaller in size in the front-to-rear direction.

Note that, although the above example shows a vehicle headlamp 1 having a reflector 10, the present invention can also be applied to so-called direct-type vehicle headlamp that does not have a reflector.

The shapes and structures of the various parts shown in the above-mentioned embodiments of the invention are merely examples of the embodiments that may be implemented in the practice of the invention, and the technical scope of the invention should not be interpreted in a limiting manner based on these.

7...Lamp unit (vehicle lamp unit), 9...Projection lens, 11...Light source unit, 24...Light source, 25...Heat sink, 26...Light quantity control mechanism, 29...Moveable shade, 31...Coil body (solenoid), 32...Output shaft, 39...Pivot shaft, S...Focus of projection lens

Claims (5)

A light source unit including a heat sink and a light source attached to an upper side of the heat sink with a light emitting surface facing upward;
a reflector disposed above the light source unit and configured to reflect light emitted from the light source forward;
a projection lens that projects the light reflected by the reflector;
A movable shade that switches the amount of light reflected by the reflector;
A rotation shaft about which the movable shade rotates;
an actuator that rotates the movable shade around the rotation axis;
a transmission body that transmits the motion of the actuator to the movable shade to rotate the movable shade about the rotation axis;
a bearing portion that supports the movable shade and is assembled in a state in which the rotation axis of the movable shade extends in the left-right direction, and a receiving surface portion that faces in the front-rear direction, and a holding portion that holds the actuator on the receiving surface portion;
Equipped with
The movable shade is switched to one of two position states, a first position state and a second position state, by the actuator,
a biasing spring for rotating the movable shade from the second position state to the first position state is attached to the rotation shaft ;
A vehicle lamp unit , wherein the light source unit is attached to the holding portion from an opposite side to the actuator . The vehicle lamp unit according to claim 1, characterized in that the biasing spring is disposed between the projection lens and the focal point of the projection lens. The heat sink and the cooling fan are arranged side by side in the vertical direction,
2. The vehicle lamp unit according to claim 1, wherein the cooling fan is disposed so as to be housed within a lower portion of the heat sink. The vehicle lamp unit according to claim 1, characterized in that the light quantity control mechanism including the actuator, the movable shade, and the transmission body is disposed between the projection lens and the focal point of the projection lens. The vehicle lamp unit according to claim 1 , wherein the holding portion supports the projection lens.

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