JP2013045561A - Optical unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical unit capable of forming more kinds of light distribution patterns than can realize only by turning on and off a light source.SOLUTION: The optical unit 10 is used for a lamp fitting for a vehicle. The optical unit 10 is provided with a first shade 12A capable of moving between an advancing position for shielding part of light emitted from a first LED 14a and an evacuation position in which a fading volume is reduced, a second shade 12B arranged beside the first shade 12A and capable of moving between an advancing position for shielding part of light emitted from a second LED 14b and an evacuation position in which a fading volume is reduced, a motor 19 capable of rotating forward and backward, and a transmission mechanism 18 making the first shade 12A move when the motor 19 rotates forward and making the second shade 12B move when the motor 19 rotates backward.

Description

  The present invention relates to an optical unit, and more particularly to a structure of an optical unit for a vehicle headlamp.

  Conventionally, there is a variable-light-distribution type vehicle headlamp device that forms a low-beam light distribution pattern by shielding light from a light source with a shade and forms a high-beam light distribution pattern when not shaded by a shade. Further, with the recent improvement in performance of vehicles, a headlamp device has been proposed in which the headlamp forms a light distribution pattern having a shape different from that of a standard low beam or high beam according to the surrounding conditions. In particular, in the case of a high beam, it is necessary to consider glare for oncoming vehicles and pedestrians while improving the driver's visibility. Therefore, for example, the vehicular lamp disclosed in Patent Document 1 has a structure that can optimally set a high beam irradiation area according to the presence or absence of a pedestrian, a preceding vehicle, or an oncoming vehicle.

JP 2007-179969 A

  However, the vehicular lamp of Patent Document 1 includes a plurality of light sources, and each light source irradiates a different area. Then, for example, irradiation of a portion where a pedestrian is present is suppressed by combining turning on and off of each light source. Specifically, three light sources are mounted, and three individual irradiation areas can be formed. The three light sources are controlled to form a fully lit state, two lit states, one lit state, and all unlit states to form a light distribution pattern. As described above, in the case of the vehicular lamp disclosed in Patent Document 1, a light source is required for each region that is desired to be turned on and off, resulting in an increase in the size of the housing, an increase in component costs, and complicated control. Moreover, the required power has increased with the increase in the number of light sources.

  SUMMARY An advantage of some aspects of the invention is that it provides an optical unit capable of forming a light distribution pattern of a kind higher than that which can be realized only by turning on and off a light source.

  In order to solve the above problems, an optical unit according to an aspect of the present invention is an optical unit used in a vehicular lamp, and an advancing position where a part of light emitted from a light source is blocked, and a light reduction amount is reduced. A first shade that can move between a retreat position, a second position that is arranged next to the first shade and that can move between an advancing position that blocks a part of the light emitted from the light source and a retreat position that reduces the amount of light reduction. A shade, a drive source capable of forward and reverse rotation, and a transmission mechanism that moves the first shade when the drive source rotates forward and moves the second shade when the drive source rotates reversely.

  When the drive source is in the non-drive state, the first shade may be biased to the advanced position and the second shade may be biased to the retracted position.

  When both the first shade and the second shade are located at the advanced position, a part of the first shade and a part of the second shade may overlap.

  The first shade may have a U-shaped horizontal cross section, and the second shade may have an L-shaped horizontal cross section.

  You may further have the 1st light source which radiate | emits light centering on a driving lane side, and the 2nd light source which radiate | emits light centering on an opposing lane side.

  ADVANTAGE OF THE INVENTION According to this invention, the optical unit which can form the light distribution pattern more than the kind which can be implement | achieved only by turning on and off of a light source can be provided.

It is a schematic sectional drawing for demonstrating the internal structure of the vehicle headlamp apparatus which mounts the optical unit which concerns on this embodiment. It is a schematic perspective view for demonstrating the internal structure of the optical unit which concerns on this embodiment. It is a figure for demonstrating the structure of a transmission mechanism. It is a figure for demonstrating the state of a 1st shade and a 2nd shade when a motor rotates forward. It is a figure for demonstrating the state of a 1st shade and a 2nd shade when a motor reversely rotates. 6A and 6B are diagrams for explaining a light distribution pattern formed by the optical unit according to the present embodiment. It is a figure which shows the image example of the position of a 1st shade and a 2nd shade, and the light distribution pattern formed.

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

  FIG. 1 is a schematic cross-sectional view for explaining the internal structure of a vehicle headlamp device 210 on which an optical unit 10 according to this embodiment is mounted. The vehicle headlamp device 210 is a high beam headlamp that is arranged one by one on the left and right in the vehicle width direction of the vehicle. Since the structure is substantially the same on the left and right, the vehicle is typically arranged on the right side of the vehicle. The structure of the headlamp device 210R will be described. The high beam vehicular headlamp device 210 has a light distribution pattern for the high beam as a whole by superimposing the light distribution pattern on the low beam formed by the separately disposed low beam vehicular headlamp device. Form.

  The vehicle headlamp device 210R includes a lamp body 212 and a transparent cover 214. The lamp body 212 has an opening in the front direction of the vehicle, and has a detachable cover 212a to be removed during maintenance on the rear side. A transparent cover 214 is connected to the opening in front of the lamp body 212 to form a lamp chamber 216. The lamp chamber 216 houses the optical unit 10 that irradiates light in the forward direction of the vehicle. A lamp bracket 218 having a pivot mechanism 218 a serving as a swing center of the optical unit 10 is formed in a part of the optical unit 10. The lamp bracket 218 is screwed with an aiming adjustment screw 220 that is rotatably supported on the wall surface of the lamp body 212. Therefore, the optical unit 10 is supported at a predetermined position in the lamp chamber 216 in a tilting posture determined by the adjustment state of the aiming adjustment screw 220.

  A rotation shaft 222a of the swivel actuator 222 is fixed to the lower surface of the optical unit 10, so that the optical unit 10 can be rotated in the horizontal direction.

  The swivel actuator 222 is fixed to the unit bracket 224. A leveling actuator 226 arranged outside the lamp body 212 is connected to the unit bracket 224 so that the optical unit 10 can tilt in the vertical direction.

  On the inner wall surface of the lamp chamber 216, for example, at a position below the optical unit 10, a control unit 228 that performs turning on / off control of the optical unit 10 and light distribution pattern formation control is disposed. The control unit 228 may also execute control of the swivel actuator 222, the leveling actuator 226, and the like. The control unit 228 may be provided in addition to the vehicle headlamp device 210R. Moreover, it is good also as only the function to relay control, such as turning on and off from the vehicle side.

  The optical unit 10 includes a first LED 14a and a second LED 14b as light sources, a first LED support portion 13a and a second LED support portion 13b for supporting the first LED 14a and the second LED 14b, respectively, a first reflector 16a and a second reflector 16b. (Shade 12A of 1st, 12A of 2nd shades), the projection lens 20, the motor 19 as a drive source, the transmission mechanism 18, and the lamp housing 17 which accommodates these components.

  The first LED 14 a and the second LED 14 b are controlled to be turned on and off by the control unit 228. The first reflector 16a and the second reflector 16b reflect light emitted from the first LED 14a and the second LED 14b, respectively. The light reflected by the first reflector 16 a and the second reflector 16 b is guided to the projection lens 20. The first shade 12A and the second shade 12B are arranged between the first reflector 16a, the second reflector 16b, and the projection lens 20.

  The first shade 12 </ b> A and the second shade 12 </ b> B rotate around the rotation shaft 15 to block a part of the light emitted from the first LED 14 a and the second LED 14 b (hereinafter referred to as an advance position), and reduce the amount of light. It is configured to be movable between a decreasing position (hereinafter referred to as a retracted position). FIG. 1 shows a state where the first shade 12A and the second shade 12B are located at the advanced position.

  The motor 19 is configured to be able to rotate forward and backward by a control signal from the control unit 228. The transmission mechanism 18 is configured to move the first shade 12A when the motor 19 rotates forward, and to move the second shade 12B when the motor 19 rotates reversely.

  Thus, the optical unit 10 according to the present embodiment can control the positions of the first shade 12A and the second shade 12B by controlling the rotation direction of the motor 19, and can form various light distribution patterns. ing.

  FIG. 2 is a schematic perspective view for explaining the internal structure of the optical unit 10 according to the present embodiment. As described above, the optical unit 10 includes the first LED 14a, the second LED 14b, the first LED support portion 13a, the second LED support portion 13b, the first reflector 16a, the second reflector 16b, the first shade 12A, and the second shade 12B. A projection lens 20, a motor 19, and a transmission mechanism 18.

  The first reflector 16a and the second reflector 16b are arranged side by side in the vehicle width direction W with one end in contact. A first LED support 13a is provided on the side of the other end of the first reflector 16a, and a second LED support 13b is provided on the side of the other end of the second reflector 16b. Yes. A first LED 14a is mounted on the first LED support portion 13a so as to emit light toward the first reflector 16a. After being emitted from the first LED 14a, the light reflected by the first reflector 16a is emitted mainly around the traveling lane side through the projection lens 20. Further, the second LED 14b is mounted on the second LED support portion 13b so as to emit and emit light toward the second reflector 16b. After being emitted from the second LED 14b, the light reflected by the second reflector 16b is emitted mainly around the opposite lane side via the projection lens 20. The 1st reflector 16a and the 2nd reflector 16b are comprised so that the light from 1st LED14a and 2nd LED14b may be condensed on the back focal point of the projection lens 20 provided ahead, or its vicinity.

  A first shade 12A and a second shade 12B are arranged side by side in the vehicle width direction W at or near the rear focal point of the projection lens 20. In the case of the present embodiment, the first shade 12A has a substantially U-shaped horizontal section, and the second shade 12B has an L-shaped horizontal section. When the first shade 12A and the second shade 12B are in the advanced position, the first shade 12A and the second shade 12B block a part of the light reflected by the first reflector 16a and the second reflector 16b.

  FIG. 2 shows a state in which the first shade 12A is in the advanced position and the second shade 12B is in the retracted position. The first shade 12A is urged to the advanced position by a first urging member (not shown). The second shade 12B is biased to the retracted position by a second biasing member (not shown). Therefore, when the motor 19 is in a non-driven state, the first shade 12A and the second shade 12B are in a state as shown in FIG. In this case, since a part of the reflected light from the first reflector 16a and the second reflector 16b is shielded by the first shade 12A, the optical unit 10 is provided with a special high beam distribution that does not irradiate a part of the area. Form a pattern.

  When the motor 19 rotates forward, the first shade 12A moves to the retracted position. At this time, the second shade 12B does not move and remains in the retracted position. Accordingly, both the first shade 12A and the second shade 12B are in the retracted position. In this case, since the reflected light from the first reflector 16a and the second reflector 16b is incident on the projection lens 20 with almost no attenuation, the optical unit 10 forms a normal high beam light distribution pattern.

  When the motor 19 rotates in the reverse direction, the second shade 12B moves to the advanced position. At this time, the first shade 12A does not move and remains in the advanced position. Accordingly, the first shade 12A and the second shade 12B are both advanced positions. In this case, in this case, a part of the reflected light from the first reflector 16a and the second reflector 16b is shielded by the first shade 12A and the second shade 12B. A special high beam light distribution pattern that is not irradiated is formed. In this case, the non-irradiation area is larger than the case where the light is shielded only by the first shade 12A.

  FIG. 3 is a view for explaining the structure of the transmission mechanism 18. FIG. 3 shows a state in which the transmission mechanism 18 is viewed obliquely from below. As shown in FIG. 3, the transmission mechanism 18 includes a base member 30, a motor gear 31 attached to the rotating shaft of the motor 19, a fan-shaped gear 32, the rotating shaft 15, and a first shade that supports the first shade 12 </ b> A. A support member 33, a second shade support member 34 that supports the second shade 12 </ b> B, a first biasing member 36, and a second biasing member 37 are provided.

  As shown in FIG. 3, the base member 30 is provided with a rotating shaft 15. The first shade support member 33, the second shade support member 34, and the fan gear 32 are each provided with a hole. The 1st shade support member 33, the 2nd shade support member 34, and the fan-shaped gear 32 are attached to the base member 30 by inserting the rotating shaft 15 in each hole. The fan-shaped gear 32 is disposed between the first shade support member 33 and the second shade support member 34.

  The first shade support member 33 is urged to be positioned at the advanced position by a first urging member 36 formed of a torsion spring. Further, the second shade support member 34 is urged to be positioned at the retracted position by a second urging member 37 constituted by a torsion spring. Therefore, when the motor 19 is in a non-driven state (that is, when power supply to the motor 19 is stopped), as shown in FIG. 3, the first shade 12A is located at the advanced position and the second shade 12B is located at the retracted position. Yes.

  The fan gear 32 is arranged so as to mesh with the motor gear 31. When the motor 19 is not driven, the motor gear 31 is located at the center of the fan-shaped gear 32. As shown in FIG. 3, the fan-shaped gear 32 includes a first engagement portion 32a and a second engagement portion 32b. The first engagement portion 32 a is formed to engage with a third engagement portion 33 a provided on the first shade support member 33. The second engaging portion 32 b is formed to engage with a fourth engaging portion 34 a provided on the second shade support member 34.

  In the optical unit 10 according to the present embodiment, the transmission mechanism 18 moves the first shade 12A when the motor 19 rotates in the forward direction (rotation in the direction indicated by the arrow P), and the motor 19 rotates in the reverse direction (by the arrow N). The second shade 12B is configured to move when rotated in the direction shown).

  FIG. 4 is a diagram for explaining the state of the first shade 12A and the second shade 12B when the motor 19 rotates forward. When the motor 19 rotates forward, the fan-shaped gear 32 rotates according to the rotation of the motor gear 31. At this time, the first engagement portion 32a of the fan-shaped gear 32 engages with the third engagement portion 33a of the first shade support member 33 to rotate the first shade support member 33, and the first shade 12A is retracted. Move to. On the other hand, since the second engaging portion 32b of the fan-shaped gear 32 does not engage with the fourth engaging portion 34a of the second shade support member 34, the second shade support member 34 does not rotate and the second shade 12B is retracted. Remains biased into position. Therefore, when the motor 19 rotates forward, both the first shade 12A and the second shade 12B are located at the retracted position as shown in FIG. In the state shown in FIG. 4, if the motor 19 is not driven, the first shade 12 </ b> A returns to the advanced position by the urging force of the first urging member 36.

  FIG. 5 is a diagram for explaining a state of the first shade 12A and the second shade 12B when the motor 19 rotates in the reverse direction. When the motor gear 31 rotates in the reverse direction, the fan-shaped gear 32 rotates according to the rotation of the motor gear 31. At this time, the second engagement portion 32b of the fan-shaped gear 32 engages with the fourth engagement portion 34a of the second shade support member 34 to rotate the second shade support member 34 and move the second shade 12B to the advanced position. Move to. On the other hand, since the first engaging portion 32a of the fan-shaped gear 32 does not engage with the third engaging portion 33a of the first shade support member 33, the first shade support member 33 does not rotate and the first shade 12A advances. Remains biased into position. Therefore, when the motor 19 rotates in the reverse direction, as shown in FIG. 5, the first shade 12A and the second shade 12B are both positioned at the advanced position. When both the first shade 12A and the second shade 12B are located at the advanced position, as shown in FIG. 5, the end of the first shade 12A on the second shade 12B side and the first shade of the second shade 12B The end on the 12A side overlaps. This prevents light from leaking from the gap between the first shade 12A and the second shade 12B. In the state shown in FIG. 5, if the motor 19 is not driven, the second shade 12 </ b> B returns to the advanced position by the urging force of the second urging member 37.

  6A and 6B are diagrams for explaining a light distribution pattern formed by the optical unit according to the present embodiment. As shown in FIG. 6A, the optical unit 10 according to the present embodiment includes a first LED 14a and a second LED 14b. The first LED 14a can irradiate light forward of the vehicle through the projection lens 20 to form a first elongated irradiation region 100a extending in the vehicle width direction W as shown in FIG. Similarly, the other second LED 14b can irradiate light forward of the vehicle via the projection lens 20 to form an elongated second irradiation region 100b extending in the vehicle width direction W. The first LED 14a is formed such that the light source shape itself corresponds to the elongated light distribution pattern of FIG. 6B, or a shape corresponding to the elongated light distribution pattern is formed by reflection adjustment by the first reflector 16a. Guided in the direction of the lens 20. The same applies to the second LED 14b. The 1st reflector 16a and the 2nd reflector 16b are reflectors formed on the basis of a paraboloid of revolution, for example.

  In the case of the present embodiment, the second irradiation region 100b is connected so as to be continuous in the lateral direction of the first irradiation region 100a. FIG. 6B shows an example in which the end region of the first irradiation region 100a and the end region of the second irradiation region 100b overlap each other to form an overlap portion 100c. The overlap portion 100c can be adjusted, for example, by adjusting the arrangement of the first LED 14a and the second LED 14b or adjusting the shapes of the first reflector 16a and the second reflector 16b. In this way, by overlapping the first irradiation region 100a and the second irradiation region 100b at the connection portion, when a high beam is formed, it is possible to increase the luminous intensity by superimposing light near the center portion. A dark part is not formed in the connection part of the 1st irradiation area | region 100a and the 2nd irradiation area | region 100b, and it can contribute to the visibility improvement at the time of high beam use and quality improvement.

  Note that the end region of the first irradiation region 100a and the end region of the second irradiation region 100b are not necessarily overlapped, and the end region of the first irradiation region 100a and the end portion of the second irradiation region 100b are not necessarily overlapped. You may make it connect an area | region exactly. FIG. 6B illustrates the first irradiation region 100a and the second irradiation region 100a in order to explain that the end region of the first irradiation region 100a and the end region of the second irradiation region 100b overlap. Although the irradiation region 100b is illustrated as being shifted in the vertical direction, the irradiation region 100b is actually arranged so as not to be shifted in the vertical direction.

  When the first shade 12A and the second shade 12B move to the advanced position, light to the end region including at least the connection portion where the first irradiation region 100a and the second irradiation region 100b are connected is shielded. ing. FIG. 6B shows the light shielding region 102 by the first shade 12A and the second shade 12B by broken lines. In the present embodiment, the size of the first shade 12A and the second shade 12B is determined so that the light shielding region 102 completely covers the overlap portion 100c.

  In this way, by turning on the first LED 14a and the second LED 14b, the first irradiation area 100a and the second irradiation area 100b are added to the upper part of the light distribution pattern for low beam that is separately lit, so A light distribution pattern can be formed. Therefore, by controlling the advance and retreat of the first shade 12 and the second shade 12B, a special light distribution pattern in which a part of the high beam light distribution pattern is shielded without changing the lighting state of the first LED 14a and the second LED 14b. Can be formed.

  FIG. 7 shows an example of the position of the first shade 12A and the second shade 12B and an image of the light distribution pattern to be formed. 7 shows a state in which the light distribution pattern formed by the high beam optical unit 10 is added to the upper portion of the low beam light distribution pattern Lo formed by the low beam optical unit. Yes.

  The vehicle headlamp device 210 according to the present embodiment includes a first LED 14a, a first LED 14a, a first LED 14a, a first pedestrian 14a, and a pedestrian in a front area acquired by a forward viewing device, for example, a camera. It is assumed that an optimal light distribution pattern is selected by performing turning on / off control of the 2LEDs 14b and performing advance / retreat control of the first shade 12A and the second shade 12B. FIG. 7 illustrates, as an example, a case where only the movement control of the first shade 12A and the second shade 12B is performed while the first LED 14a and the second LED 14b are in a lighting state.

  First, with reference to the upper part of FIG. 7, the control for forming the complete high beam light distribution pattern Hi1 will be described. The control unit 228 turns on the first LED 14a and the second LED 14b, and rotates the motor 19 in the forward direction to position the first shade 12A and the second shade 12B at the retracted position. Thereby, the light emitted from the first LED 14a and the second LED 14b is irradiated from the optical unit 10 without being blocked, and the first irradiation region 100a and the second irradiation region 100b including the overlap portion 100c in FIG. 6B are turned on. It will be in the state. This state is a complete high beam irradiation state. Therefore, the visibility of the front area of the driver of the own vehicle can be improved. In addition, the formation of the overlap portion 100c increases the light intensity near the center and further improves the visibility.

  Next, control for forming the special high beam light distribution pattern Hi2 will be described with reference to the middle part of FIG. The controller 228 turns on the first LED 14a and the second LED 14b, and reversely rotates the motor 19 to position the first shade 12A and the second shade 12B at the advanced position. Thereby, a part of the light emitted from the first LED 14a and the second LED 14b is shielded by the first shade 12A and the second shade 12B, and from near the center in front of the host vehicle (far distance) to near the center of the oncoming lane (short distance). On the other hand, a special high beam light distribution pattern Hi2 that is not irradiated with high beam light can be formed. This applies, for example, when there are many oncoming vehicles at long distances and short distances in the oncoming lane, there are no preceding vehicles in the short distance on the own lane, and there are no pedestrians on the shoulder of the oncoming lane. Is a preferred light distribution pattern. In this case, it is possible to prevent glare from being applied to a forward vehicle at a long distance or an oncoming vehicle at a short distance on the oncoming lane, and to see the driver's own sight on the own lane and the shoulder of the oncoming vehicle. Can be improved.

  Next, control for forming another special high beam light distribution pattern Hi3 will be described with reference to the lower part of FIG. The special high beam light distribution pattern Hi3 has a narrower non-irradiated region of the high beam than the special high beam light distribution pattern Hi2. The control unit 228 turns on the first LED 14a and the second LED 14b, sets the motor 19 in the non-driven state, and positions the first shade 12A in the advanced position and the second shade 12B in the retracted position. Thereby, a part of the light emitted from the first LED 14a and the second LED 14b is shielded by the first shade 12A, and the special high beam light distribution pattern Hi3 can be formed in which the high beam light is not irradiated to the vicinity of the center in front of the host vehicle. . In this case, for example, there is a forward vehicle near the center (far distance) in front of the host vehicle, there is no oncoming vehicle in the near distance of the oncoming lane, and there is no preceding vehicle at a short distance on the own lane side, This light distribution pattern is preferably applied when there is no pedestrian on the opposite lane side. In this case, it is possible to prevent glare from appearing on the forward vehicle existing at a long distance in the vicinity of the center in front of the host vehicle. Visibility can be improved.

  In this way, by controlling the advance / retreat of the first shade 12A and the second shade 12B, it is possible to form a light distribution pattern that cannot be realized only by turning on / off the first LED 14a and the second LED 14b. Further, in addition to the position control of the three types of first shade 12A and second shade 12B shown in FIG. 7, more light distribution patterns can be formed by adding on / off control of the first LED 14a and the second LED 14b.

  For example, as shown in the middle of FIG. 7, the first LED 14a is turned on and the second LED 14b is turned off with both the first shade 12A and the second shade 12B positioned at the advanced position, so that the own lane side is mainly in the high beam state. The so-called “left-side high light distribution pattern” can be formed. Conversely, by turning on the second LED 14b and turning off the first LED 14a, it is possible to form a light distribution pattern that irradiates the field of view of the opposite lane mainly with a high beam while being substantially equivalent to the light distribution pattern for low beams.

  Further, for example, as shown in the lower part of FIG. 7, it is also possible to turn on the first LED 14a and turn off the second LED 14b with the first shade 12A in the advanced position and the second shade 12B in the retracted position. Light distribution pattern "can be formed. Conversely, by turning on the second LED 14b and turning off the first LED 14a, it is possible to form a so-called “right-side high light distribution pattern” in which the opposite lane side is mainly in a high beam state.

  As described above, according to the optical unit 10 according to this embodiment, the light source is turned on / off by combining the positions of the first shade 12A and the second shade 12B and the first LED 14a and the second LED 14b. More than the kind of light distribution patterns that can be realized only by this can be formed. As a result, it is possible to increase the number of light distribution patterns that can be formed without increasing the number of light sources, and it is possible to reduce the number of light sources and reduce the power consumption.

  Also, normally, two actuators are required to control the positions of the two shades. However, according to the optical unit 10 according to the present embodiment, the positions of the first shade 12A and the second shade 12B can be controlled by controlling the rotation direction of the motor 19. Since only one actuator is required to control the positions of the two shades, it is possible to reduce the size and power consumption of the apparatus.

  Further, in the optical unit 10 according to the present embodiment, for example, when the light distribution pattern is switched from the complete high beam light distribution pattern Hi1 to the special high beam light distribution pattern Hi2 in FIG. A special high beam light distribution pattern Hi2 having a narrower non-irradiation area than the pattern Hi2 is sandwiched. This is because, when the motor 19 is reversely rotated while the first shade 12A and the second shade 12B are in the retracted position, the first shade 12A first moves to the advanced position, and then the second shade 12B moves to the advanced position. Because. As described above, the width of the irradiation region changes stepwise from the state of the complete high beam light distribution pattern Hi1, thereby reducing the driver's uncomfortable feeling caused by the change of the irradiation region.

  Similarly, when the special high beam light distribution pattern Hi2 is switched to the complete high beam light distribution pattern Hi1, the special high beam light distribution pattern Hi2 is sandwiched between the switching. This is because, when the motor 19 is reversely rotated while the first shade 12A and the second shade 12B are in the advanced position, the second shade 12B first moves to the retracted position, and then the first shade 12A moves to the retracted position. Because. Also in this case, the driver's uncomfortable feeling caused by the change in the irradiation area is reduced.

  The present invention has been described above based on the embodiment. It should be understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Optical unit, 12A 1st shade, 12B 2nd shade, 13a 1st LED support part, 13b 2nd LED support part, 14a 1st LED, 14b 2nd LED, 15 rotating shaft, 16a 1st reflector, 16b 2nd reflector, 17 lamp Housing, 18 Transmission mechanism, 19 Motor, 20 Projection lens, 30 Base member, 31 Motor gear, 32 Fan gear, 33 First shade support member, 34 Second shade support member, 36 First bias member, 37 Second bias Member, 210 vehicle headlamp device, 212 lamp body, 214 transparent cover, 216 lamp chamber, 218 lamp bracket, 222 swivel actuator, 224 unit bracket, 226 leveling actuator, 228 control Mibe.

Claims (5)

An optical unit used in a vehicle lamp,
A first shade that can move between an advancing position that blocks a part of the light emitted from the light source and a retreat position where the amount of reduced light decreases;
A second shade that is arranged next to the first shade and is movable between an advancing position that blocks a part of the light emitted from the light source and a retreat position where the light reduction amount is reduced;
A drive source capable of forward and reverse rotation;
A transmission mechanism that moves the first shade when the drive source rotates forward, and moves the second shade when the drive source rotates reversely;
An optical unit comprising:   2. The optical unit according to claim 1, wherein when the driving source is in a non-driving state, the first shade is biased to the advanced position and the second shade is biased to the retracted position.   2. When the first shade and the second shade are both in the advanced position, a part of the first shade and a part of the second shade overlap each other. The optical unit according to 2.   4. The optical unit according to claim 1, wherein the first shade has a U-shaped horizontal section, and the second shade has an L-shaped horizontal section. 5.   5. The optical unit according to claim 1, further comprising: a first light source that emits light around a traveling lane side; and a second light source that emits light around an opposite lane side. .

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