JP2012018839A - Light-emitting unit and lamp fitting for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting unit which can carry out downsizing a lamp fitting.SOLUTION: The light-emitting unit 30 includes an attachment 36 fitted to a given position of the lamp fitting. The unit 30 has an LED substrate loading part 36c, a shade 40, a driving part 42 driving the shade 40 to control light distribution from a light-emitting diode 38, and a power-feeding part 44 for feeding power to the light-emitting diode 38 and the driving part 42 fitted to the attachment 36.

Description

  The present invention relates to a light emitting unit and a vehicular lamp using the light emitting unit.

  Conventionally, the distance and distribution pattern for long distances for high beams (traveling beams) for irradiating a long distance according to the inclination and position of the shade are made variable by changing the inclination and position of the shade that blocks part of the light. There is known a vehicular headlamp that forms a short-distance light distribution pattern for a low beam (passing beam) for irradiating a distance.

  For example, Patent Document 1 discloses a vehicle headlamp having a plate-like shade that blocks part of light emitted from a light-emitting diode, and a shade driving unit that moves the plate-like shade in the vertical direction. Has been.

JP 2009-48948 A

  However, when the mechanism for changing the inclination and position of the shade is provided in the vehicular lamp as in Patent Document 1 described above, the vehicular lamp tends to be enlarged.

  This invention is made | formed in view of such a condition, The objective is to provide the light-emitting unit which can miniaturize a lamp, and a small vehicle lamp.

  In order to solve the above problems, a light emitting unit according to an aspect of the present invention is a light emitting unit having an attachment attached to a predetermined position of a lamp. The light emitting unit includes a mounting portion for a light emitting element, an optical member, a driving unit that drives the optical member to control light distribution from the light emitting element, and a power feeding unit that feeds power to the light emitting element and the driving unit. It is characterized by that.

  According to this aspect, it is possible to realize a light emitting unit in which a light emitting element mounting portion, an optical member, a driving portion, and a power feeding portion are integrated with an attachment. By using the light emitting unit, the number of parts of the lamp is reduced, so that the lamp can be miniaturized.

  The optical member may include a shade that blocks part of light from the light emitting element.

  The shade is divided into a first sub-shade and a second sub-shade, and the light distribution from the light-emitting elements is achieved by the drive unit changing the open state of the first sub-shade and the second sub-shade. May be changed.

  The shade is a rotary shade capable of controlling the light from the light emitting element into a plurality of light distributions by rotating, the drive unit is a motor that rotationally drives the rotary shade, and the rotational shaft of the rotary shade has a rotation axis of the motor. You may arrange | position so that it may correspond with a rotating shaft.

  The optical member includes a mirror provided in the vicinity of the light emitting element, and the driving unit takes a first position where the light from the light emitting element is reflected and a second position where the light from the light emitting element is not reflected. The mirror may be driven.

  Another aspect of the present invention is a vehicular lamp. This vehicular lamp includes the light emitting unit described above. According to this aspect, a small vehicle lamp can be realized.

  ADVANTAGE OF THE INVENTION According to this invention, the light emission unit which can miniaturize a lamp, and a small vehicle lamp can be provided.

It is sectional drawing of the vehicle lamp using the light emission unit which concerns on embodiment of this invention. It is a perspective view of the light emitting unit concerning the embodiment of the present invention. It is a perspective view of the light emitting unit concerning another embodiment of the present invention. It is a perspective view of the light emitting unit concerning another embodiment of the present invention. It is a perspective view of the light emitting unit concerning another embodiment of the present invention. It is a perspective view of the light emitting unit concerning another embodiment of the present invention. It is a perspective view of the light emitting unit concerning another embodiment of the present invention. FIGS. 8A to 8D are diagrams for explaining the operation of the vehicular lamp using the light emitting unit shown in FIG. It is a perspective view of the light emitting unit concerning another embodiment of the present invention. 10A to 10F are diagrams for explaining the operation of the vehicular lamp using the light emitting unit shown in FIG. It is sectional drawing of another vehicle lamp using the light emission unit which concerns on embodiment of this invention. It is a perspective view of the light emitting unit concerning another embodiment of the present invention.

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

  FIG. 1 is a cross-sectional view of a vehicular lamp using a light emitting unit according to an embodiment of the present invention. A vehicular lamp 10 shown in FIG. 1 is used as a headlamp.

  As shown in FIG. 1, the vehicular lamp 10 includes a lamp body 12 having a recess opened in front of the lamp, and a cover 14 that closes the opening surface of the lamp body 12. The formed internal space is formed as a lamp chamber 16.

  A lamp unit 20 is disposed in the lamp chamber 16. The lamp unit 20 includes a projection lens 26, a lens support member 28, a light emitting unit 30, a radiation fin 32, and a fan 34. The lamp unit 20 is a direct-type lamp unit that directly irradiates the light generated by the light emitting unit 30 forward by the projection lens 26.

  As shown in FIG. 1, the lamp unit 20 is attached to a substantially central portion of the bracket 18. A first aiming screw 21 is attached to the upper part of the bracket 18, and a second aiming screw 22 is attached to the lower part of the bracket 18. The bracket 18 is supported on the lamp body 12 by a first aiming screw 21 and a second aiming screw 22 so as to be tiltable. An aiming actuator 24 is provided on the lower second aiming screw 22. When the aiming actuator 24 is driven, the lamp unit 20 is tilted as the bracket 18 is tilted, and the optical axis adjustment (aiming adjustment) of the illumination light is performed.

  The light emitting unit 30 is provided on the front side of the bracket 18. The light emitting unit 30 includes an attachment 36 for attaching the light emitting unit 30 to the bracket 18, a light emitting diode 38, a substrate 39 for mounting the light emitting diode 38, and a shade 40 that shields a part of the light from the light emitting diode 38. And have. The light emitting diode 38 is disposed such that the light emitting surface faces the front of the lamp.

  In the present embodiment, the shade 40 is configured to be movable between a shielding position and an open position. When the shade 40 is in the shielding position, part of the light from the light emitting diode 38 is shielded, and light forming a so-called low beam is emitted from the light emitting unit 30. On the other hand, when the shade 40 is in the open position, light from the light emitting diode 38 is not shielded, and light forming a so-called high beam is emitted from the light emitting unit 30. The detailed configuration of the light emitting unit 30 will be described later.

  On the back side of the bracket 18, heat radiating fins 32 are provided so as to contact the substrate 39. The heat radiation fin 32 releases heat generated when light is emitted from the light emitting diode 38. A fan 34 for cooling the heat radiation fin 32 is provided behind the heat radiation fin 32.

  A projection lens 26 is provided in front of the light emitting unit 30. The projection lens 26 is supported by a lens support member 28. The projection lens 26 is a plano-convex aspherical lens having a convex front surface and a flat rear surface. The projection lens 26 has a light source image formed on the rear focal plane as an inverted image on a virtual vertical screen in front of the vehicular lamp 10. Project. The projection lens 26 is disposed so that the rear focal point is located on the light emitting surface of the light emitting diode 38 or in the vicinity of the light emitting surface.

  FIG. 2 is a perspective view of the light emitting unit 30 according to the embodiment of the present invention. The light emitting unit 30 emits light by driving the attachment 36 attached to a predetermined position of the lamp (the bracket 18 in the present embodiment), the light emitting diode 38, the substrate 39 on which the light emitting diode 38 is mounted, the shade 40, and the shade 40. A drive unit 42 that controls light distribution from the diode 38 and a power supply unit 44 that supplies power to the light emitting diode 38 and the drive unit 42 are provided.

  As shown in FIG. 2, the attachment 36 includes an LED for mounting a first mounting portion 36 a and a second mounting portion 36 b in which holes for inserting fixing bolts are formed, a light emitting diode 38 and a substrate 39. A substrate mounting part 36c and an actuator mounting part 36d for mounting the drive part 42 are provided.

  The LED board mounting portion 36c is a rectangular plate-like member, and a rectangular hole 36e for holding the substrate 39 is formed at the center thereof. The actuator mounting portion 36d is also a rectangular plate member. The LED board mounting portion 36c and the actuator mounting portion 36d are connected to each other at the side portions, and are formed as an integral member. The LED board mounting portion 36c has a first mounting portion 36a formed on the side portion opposite to the side portion to which the actuator mounting portion 36d is connected. The actuator mounting portion 36d has a second mounting portion 36b formed on the side portion opposite to the side portion to which the LED substrate mounting portion 36c is connected.

  A plurality of spring terminals 46 are provided on the inner wall surface of the hole 36e of the LED board mounting portion 36c. The spring terminals are provided at the four corners of the hole 36e, and are electrically connected to electrodes (not shown) formed on the LED mounting surface by urging the LED mounting surface of the substrate 39 to the rear of the lamp. Is done. The spring terminal 46 also has a function of holding the substrate 39 on the LED substrate mounting portion 36c by its urging force.

  A power feeding unit 44 is provided on the LED substrate mounting unit 36c. The power feeding unit is electrically connected to the spring terminal 46 and supplies power to the light emitting diode 38 via the spring terminal and the substrate 39 when a power plug is inserted from the outside. The power feeding unit 44 is also electrically connected to the driving unit 42 and supplies power for driving the driving unit 42.

  In the present embodiment, the drive unit 42 includes a DC motor 41 and a rotating shaft 48 that extends from the rotating shaft of the DC motor 41. The rotary shaft 48 is provided with a shade 40. The DC motor 41 is fixed to the actuator mounting portion 36 d of the attachment 36.

  The upper edge of the shade 40 is formed so that a predetermined low beam light distribution pattern is formed. As shown in FIG. 2, when the shade 40 is erected in front of the light emitting diode 38, the shade 40 is in the shielding position, and the light from the light emitting diode 38 is partially shielded by the shade 40 to emit light. The light is emitted from the unit 30. When the drive unit 42 is driven from the state of FIG. 2, the shade 40 rotates in front of the lamp around the rotation shaft 48, and finally stops with the stopper 50. At this time, the shade 40 is in the open position, and the light from the light emitting diode 38 is emitted from the light emitting unit 30 without being shielded by the shade 40.

  As described above, in the light emitting unit 30 shown in FIG. 2, the light emitting diode 38 and the substrate 39, the shade 40, the drive unit 42, and the power feeding unit 44 are integrally provided in the attachment 36. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  FIG. 3 is a perspective view of a light emitting unit 130 according to another embodiment of the present invention. In the embodiment described below, the same reference numerals are used for the same or corresponding components as those of the light emitting unit 30 shown in FIG.

  The light emitting unit 130 shown in FIG. 3 is different from the light emitting unit 30 shown in FIG. 2 in that the drive unit 42 includes a piezoelectric actuator 43 and a shaft 51 extending vertically upward from the piezoelectric actuator 43. A shade 40 is attached to the shaft 51. In the present embodiment, as shown in FIG. 3, the lower portion of the LED board mounting portion 36 c is an actuator mounting portion 36 d for attaching the driving portion 42.

  In the light emitting unit 130, when the drive unit 42 is driven, the shaft 51 moves up and down, and the shade 40 moves up and down accordingly. When the shade 40 moves to the uppermost position, the shade 40 is in the shielding position, and the light from the light emitting diode 38 is partially shielded by the shade 40 and emitted from the light emitting unit 30. On the other hand, when the shade 40 moves downward, the shade 40 is in the open position, and the light from the light emitting diode 38 is emitted from the light emitting unit 30 without being shielded by the shade 40.

  Also in the light emitting unit 30 shown in FIG. 3, the light emitting diode 38 and the substrate 39, the shade 40, the driving unit 42, and the power feeding unit 44 are integrally provided in the attachment 36. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  Further, in the light emitting unit 130 shown in FIG. 3, since the piezoelectric actuator 43 is used instead of the DC motor, the light emitting unit can be made smaller than the embodiment shown in FIG.

  FIG. 4 is a perspective view of a light emitting unit 230 according to still another embodiment of the present invention.

  In the light emitting unit 230 shown in FIG. 4, the drive unit 42 includes a stepping motor 55, a lead screw 52 extending from a rotation shaft of the stepping motor 55, and a nut 54 that moves in the vehicle width direction by the rotation of the lead screw 52. Prepare. The nut 54 is provided with a shade 40. The stepping motor 55 is attached to the actuator mounting portion 36 d of the attachment 36.

  In the light emitting unit 230, when the shade 40 is in an open position not covering the front of the light emitting diode 38, the light from the light emitting diode 38 is emitted from the light emitting unit 30 without being shielded by the shade 40. The light distribution pattern formed in front of the vehicular lamp 10 can be controlled by driving the drive unit 42 and adjusting the position of the shade 40 in the vehicle width direction. For example, by moving the shade 40 and shielding approximately half of the light from the light emitting diode 38, a light distribution pattern for irradiating a high beam only on one lane can be formed.

  As described above, also in the light emitting unit 230 illustrated in FIG. 4, the light emitting diode 38 and the substrate 39, the shade 40, the driving unit 42, and the power feeding unit 44 are integrally provided in the attachment 36. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  Furthermore, in the light emitting unit 230 shown in FIG. 4, the position of the shade 40 is controlled so that the light distribution emitted from the light emitting unit 230 can be controlled. Thereby, the vehicular lamp 10 capable of forming various light distribution patterns according to the traveling state can be realized.

  FIG. 5 is a perspective view of a light emitting unit 330 according to still another embodiment of the present invention.

  In the light emitting unit 330 shown in FIG. 5, the shade 40 is divided into a first sub-shade 40a and a second sub-shade 40b, and the drive unit 42 changes the open state of the first sub-shade 40a and the second sub-shade 40b. By doing so, the light distribution of the light from the light emitting diode 38 is changed.

  In the light emitting unit 330, the drive unit 42 includes a stepping motor 55, a rotation shaft 48 extending from the rotation shaft of the stepping motor 55, and a protrusion 56 provided in the middle of the rotation shaft 48. The rotating shaft 48 includes a first rotating shaft 48a that is directly connected to the rotating shaft of the drive unit 42, and a second rotating shaft 48b that extends from the tip of the first rotating shaft 48a. The second rotating shaft 48b is configured to be rotatable with respect to the first rotating shaft 48a. A first subshade 40a is provided on the first rotating shaft 48a, and a second subshade 40b is provided on the second rotating shaft 48b.

  As shown in FIG. 5, when both the first sub-shade 40a and the second sub-shade 40b are erected in front of the light-emitting diode 38, the shade 40 is in the shielding position, and the light from the light-emitting diode 38 A part is shielded by the first sub-shade 40 a and the second sub-shade 40 b and emitted from the light emitting unit 30. In this case, a low beam is emitted from the vehicular lamp 10.

  When the drive unit 42 is driven from the state of FIG. 2, the first sub-shade 40a rotates forward of the lamp around the first rotation shaft 48a, but the second sub-shade 40b does not rotate. When the first sub-shade 40a rotates until the light from the light-emitting diode 38 is not blocked, the light from the light-emitting diode 38 is blocked only by the second sub-shade 40b. It is possible to form a light distribution pattern in which a high beam is irradiated and a low beam is irradiated on the other lane.

  When the driving unit 42 is further driven from the state in which only the first sub-shade 40a is opened, the first sub-shade 40a comes into contact with the protrusion 56 provided on the second rotating shaft 48b and rotates the second rotating shaft 48b. . When the second sub-shade 40b rotates to the open position in front of the lamp along with the rotation of the second rotation shaft 48b, the light from the light-emitting diode 38 is not blocked by the first sub-shade 40a and the second sub-shade 40b, but the light-emitting unit. 30, and a high beam is emitted from the vehicular lamp 10.

  As described above, also in the light emitting unit 330 shown in FIG. 5, the light emitting diode 38 and the substrate 39, the first subshade 40 a and the second subshade 40 b, the drive unit 42, and the power feeding unit 44 are integrated with the attachment 36. It was set as the structure provided in. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  Furthermore, in the light emitting unit 330 shown in FIG. 5, the light distribution emitted from the light emitting unit 330 can be controlled by making the shade 40 into a divided structure. Thereby, the vehicular lamp 10 capable of forming various light distribution patterns according to the traveling state can be realized.

  FIG. 6 is a perspective view of a light emitting unit 430 according to still another embodiment of the present invention.

  In the light emitting unit 430 shown in FIG. 6, the drive unit 42 includes a stepping motor 55 and a rotating shaft 48 that is rotationally driven by the stepping motor 55. The shade 40 is a rotary shade capable of controlling the light from the light emitting diode 38 to a plurality of light distributions by rotating, and the shade 40 is arranged so that the rotation axis thereof coincides with the rotation axis of the stepping motor 55. ing. This can also be said to be formed as a rotary shade on a part of the rotary shaft 48.

  In FIG. 6, the shade 40 is in the open position. At this time, light from the light emitting diode 38 is not shielded by the light emitting diode 38, and a high beam is emitted from the vehicular lamp 10. A desired light distribution pattern can be formed by adjusting the rotation amount of the shade 40 by controlling the drive unit 42.

  As described above, also in the light emitting unit 430 illustrated in FIG. 6, the light emitting diode 38 and the substrate 39, the shade 40, the driving unit 42, and the power feeding unit 44 are integrally provided in the attachment 36. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  Furthermore, in the light emitting unit 430 shown in FIG. 6, a compact light emitting unit 430 can be realized by forming a part of the rotating shaft 48 in the rotary shade.

  FIG. 7 is a perspective view of a light emitting unit 530 according to still another embodiment of the present invention.

  In the light emitting unit 530 shown in FIG. 7, a mirror 58 is provided as an optical member in the vicinity of the light emitting diode 38. More specifically, the mirror 58 is provided adjacent to the horizontal end of the light emitting surface 38 a of the light emitting diode 38.

  The mirror 58 has a first position where the light from the light emitting diode 38 is reflected and a second position where the light from the light emitting diode 38 is not reflected by an actuator (not shown) provided in the actuator mounting portion 36d. Driven to take.

  FIG. 7 illustrates a state where the mirror 58 is in the first position. When the mirror 58 is in the first position, the reflecting surface 58a of the mirror 58 is erected perpendicularly to the light emitting surface 38a of the light emitting diode 38. When the actuator is driven from the state where the mirror 58 is in the first position, the mirror 58 rotates around the rotation shaft 58b, and finally the mirror 58 falls in a direction opposite to the light emitting surface 38a. In this state, the mirror 58 is in the second position where the light from the light emitting diode 38 is not reflected.

  FIGS. 8A to 8D are diagrams for explaining the operation of the vehicular lamp 10 using the light emitting unit 530 shown in FIG. FIG. 8A shows a light distribution pattern 60 projected on the virtual vertical screen 62 in front of the vehicle when the mirror 58 is in the first position. FIG. 8B is a schematic top view of the vehicular lamp 10 when the mirror 58 is in the first position.

  The light emitting unit 530 according to the present embodiment is mounted on the vehicle lamp 10 such that the horizontal end of the light emitting diode 38 is located in the vicinity of the optical axis Ax of the projection lens 26, as shown in FIG. 8B. Is done. The rotation axis 58 b of the mirror 58 is located on the optical axis Ax of the projection lens 26.

  As described above, when the mirror 58 is in the first position, the reflection surface 58a of the mirror 58 is erected vertically with respect to the light emission surface 38a of the light emitting diode 38. The light L1 emitted diagonally to the left front from the light emitting diode 38 is reflected by the reflecting surface 58a of the mirror 58, and then is projected onto the right side of the optical axis Ax of the virtual vertical screen 62 through the projection lens 26. The light L1 can be considered as light emitted from a virtual light emitting diode 64 (shown by a broken line) that is line-symmetric with respect to the light emitting diode 38 and the optical axis Ax. The light L2 emitted from the light emitting diode 38 in the front direction is projected through the projection lens 26 onto a region on the left side of the optical axis Ax of the virtual vertical screen 62. Thus, when the mirror 58 is in the first position, the light emitted from the light emitting diode 38 is projected on both the left and right sides of the optical axis Ax, so that the virtual vertical screen 62 is shown in FIG. Such a high beam light distribution pattern 60 is formed.

  FIG. 8C shows a light distribution pattern 61 projected on the virtual vertical screen 62 in front of the vehicle when the mirror 58 is in the second position. FIG. 8B is a schematic top view of the vehicular lamp 10 when the mirror 58 is in the second position.

  As shown in FIG. 8D, when the mirror 58 is in the second position, the light L1 emitted diagonally to the left from the light emitting diode 38 passes through the projection lens 26 without being reflected by the mirror 58. The image is projected on the left side of the optical axis Ax of the virtual vertical screen 62. The light L2 emitted from the light emitting diode 38 in the front direction is projected through the projection lens 26 onto a region on the left side of the optical axis Ax of the virtual vertical screen 62. As described above, when the mirror 58 is in the second position, the light emitted from the light emitting diode 38 is projected on the left side of the optical axis Ax, so that the virtual vertical screen 62 is shown in FIG. A light distribution pattern 61 that irradiates the region on the left side of the vertical line V-V is formed.

  In the above description, the case where the mirror 58 is erected with respect to the light emitting surface 38a of the light emitting diode 38 and the case where the mirror 58 is tilted are described, but various light distribution patterns are formed by adjusting the tilt angle of the mirror 58. it can.

  Also in the light emitting unit 530 shown in FIG. 7, the light emitting diode 38 and the substrate 39, the mirror 58, the driving unit (not shown), and the power feeding unit 44 are integrally provided in the attachment 36. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  FIG. 9 is a perspective view of a light emitting unit 630 according to still another embodiment of the present invention.

  Similarly to the light emitting unit 530 shown in FIG. 7, the light emitting unit 630 shown in FIG. 9 is provided with a mirror 58 that can rotate around the rotation shaft 58 b in the vicinity of the light emitting diode 38. The mirror 58 takes a first position where the light from the light emitting diode 38 is reflected and a second position where the light from the light emitting diode 38 is not reflected by an actuator (not shown) provided in the actuator mounting portion 36d. It is driven as follows.

  Further, in the light emitting unit 630 according to the present embodiment, the mirror 58 is configured to be movable in front of the light emitting diode 38 in the horizontal direction by the driving unit 42. In the light emitting unit 630, a shade 65 parallel to the light emitting surface 38 a of the light emitting diode 38 is attached to the rotation shaft 58 b of the mirror 58. The shade 65 can also be moved together with the mirror 58 by the drive unit 42. The drive unit 42 includes a stepping motor 55, a lead screw 52 extending from the rotation shaft of the stepping motor 55, and a nut 54 to which a mirror 58 and a shade 65 are attached.

  FIGS. 10A to 10F are views for explaining the operation of the vehicular lamp 10 using the light emitting unit 630 shown in FIG. The light emitting unit 530 according to the present embodiment is mounted on the vehicle lamp 10 such that one end of the light emitting diode 38 is positioned in the vicinity of the optical axis Ax of the projection lens 26, as shown in FIG. Is done.

  FIG. 10A shows a light distribution pattern 60 projected onto the virtual vertical screen 62 in front of the vehicle when the mirror 58 is erected along the optical axis Ax. FIG. 10B is a schematic top view of the vehicular lamp 10 when the mirror 58 is erected along the optical axis Ax. At this time, as shown in FIG. 10B, the light L1 emitted diagonally to the left from the light-emitting diode 38 is reflected by the reflecting surface 58a of the mirror 58, and then passes through the projection lens 26 and passes through the virtual vertical screen 62. It is projected onto a region on the right side of the optical axis Ax. The light L2 emitted from the light emitting diode 38 in the front direction is projected through the projection lens 26 onto a region on the left side of the optical axis Ax of the virtual vertical screen 62. Thus, since the light emitted from the light emitting diode 38 is projected on both the left and right sides of the optical axis Ax, a high beam light distribution pattern 60 as shown in FIG. 10A is formed on the virtual vertical screen 62. The

  FIG. 10C shows a light distribution pattern 61 projected on the virtual vertical screen 62 in front of the vehicle when the mirror 58 is tilted in the direction opposite to the light emitting surface 38a. FIG. 10D is a schematic top view of the vehicular lamp 10 when the mirror 58 is tilted in the direction opposite to the light emitting surface 38a. At this time, as shown in FIG. 10D, the mirror 58 and the shade 65 are overlapped. As shown in FIG. 10 (d), the light L 1 emitted diagonally to the left from the light emitting diode 38 is not reflected by the mirror 58, passes through the projection lens 26, and is on the left side of the optical axis Ax of the virtual vertical screen 62. Projected into the area. The light L2 emitted from the light emitting diode 38 in the front direction is projected through the projection lens 26 onto a region on the left side of the optical axis Ax of the virtual vertical screen 62. Thus, since the light emitted from the light emitting diode 38 is projected to the left side of the optical axis Ax, the virtual vertical screen 62 has a region on the left side of the vertical line VV as shown in FIG. Is formed.

  FIG. 10E shows a light distribution pattern 63 projected on the virtual vertical screen 62 in front of the vehicle when the mirror 58 and the shade 65 are moved so as to cover a part of the light emitting surface 38 a of the light emitting diode 38. . FIG. 10F is a schematic top view of the vehicular lamp 10 when the mirror 58 and the shade 65 are moved so as to cover a part of the light emitting surface 38 a of the light emitting diode 38. In the present embodiment, as shown in FIG. 10 (f), the mirror 58 and the shade 65 are light emitting diodes when the mirror 58 is in the second position, that is, when the mirror 58 is tilted and overlaps the shade 65. 38 is moved in the horizontal direction. As shown in FIG. 10 (f), the light L 3 emitted from the light emitting surface 38 a of the light emitting diode 38 not covered by the shade 65 passes through the projection lens 26 and is on the left side of the optical axis Ax of the virtual vertical screen 62. Projected into the area. Since a part of the light from the light emitting diode 38 is shielded by the shade 65, the virtual vertical screen 62 is irradiated to a region near the vertical line VV compared to the light distribution pattern 61 of FIG. Thus, a light distribution pattern 63 is suppressed.

  In the present embodiment, the mirror 58 and the shade 65 are separated from each other and connected by the rotation shaft 58b. However, the shade 65 is not provided, and the surface facing the reflective surface 58a of the mirror 58 is formed as a non-reflective surface. May be. In this case, the same operation as described with reference to FIGS.

  Also in the light emitting unit 630 shown in FIG. 9, the light emitting diode 38 and the substrate 39, the mirror 58 and the shade 65 as optical members, the driving unit 42, and the power feeding unit 44 are integrally provided in the attachment 36. Thereby, since the number of parts in the lamp chamber 16 is reduced, the vehicular lamp 10 can be reduced in size.

  FIG. 11 is a cross-sectional view of a vehicle lamp using the light emitting unit according to the above-described embodiment. A vehicle lamp 110 shown in FIG. 11 is used as a parabolic headlamp. The vehicle lamp 110 shown in FIG. 11 includes the heat radiating fins 32, the light emitting unit 30 described in FIG. 2, the reflector 70, and the cover 14. In FIG. 11, the illustration of the lamp body and the like is omitted.

  As shown in FIG. 11, the light emitting unit 30 is fixed on the base member 32 a of the radiating fin 32 with the light emitting surface of the light emitting diode 38 facing upward.

  The reflector 70 is provided above the light emitting unit 30 and has a substantially parabolic reflecting surface 71. The reflector 70 is fixed to the heat radiation fin 32 at the lower end portion thereof. In the present embodiment, the reflecting surface 71 of the reflector 70 has a low reflection area 71a that reflects light from the light emitting diode 38 toward an irradiation area below the horizontal line in front of the vehicle, and an irradiation area above the horizontal line. A high reflection region 71b that reflects light from the light emitting diode 38 toward the surface is formed.

  Next, the operation of the vehicular lamp 110 will be described. As shown in FIG. 11, when the shade 40 of the light emitting unit 30 is tilted so as to cover a part of the light emitting surface of the light emitting diode 38, a part of the light from the light emitting diode 38 is shielded by the shade 40. Therefore, the light is incident only on the low reflection region 71a and not on the high reflection region 71b. Thereby, a low beam is emitted from the vehicular lamp 110.

  On the other hand, when the shade 40 rotates and stands upright in a direction perpendicular to the light emitting surface of the light emitting diode 38, the light from the light emitting diode 38 is not shielded by the shade 40, and enters the low reflection region 71a and the high reflection region 71b. Incident. Thereby, a high beam is emitted from the vehicular lamp 110.

  In the vehicular lamp 110 shown in FIG. 11, the light emitting unit 30 is used. However, the various light emitting units described above can be mounted on the vehicular lamp 110.

  The external shape of the vehicular lamp 110 is different for each vehicle type on which the vehicular lamp 110 is mounted. Therefore, a configuration may be adopted in which the components of the vehicle lamp 110 excluding the reflector 70 are standardized components, and the reflector 70 is changed for each vehicle type. Further, the low reflector having the low reflection area 71a and the high reflector having the high reflection area 71b are separated, and the components of the vehicular lamp 110 excluding the high reflector are used as standardized parts. It is good also as a structure which changes a reflector. In these cases, the component cost can be reduced by standardizing the component parts.

  FIG. 12 is a perspective view of a light emitting unit 730 according to still another embodiment of the present invention. The light emitting unit 730 shown in FIG. 12 has a configuration in which a lighting circuit 80 of the light emitting diode 38 is integrally provided in the attachment 36 in addition to the light emitting diode 38, the substrate 39, the shade 40, the driving unit 42, and the power feeding unit 44. Different from the light emitting unit 30 of FIG. The attachment 36 is provided with a mounting portion 36 f for mounting the lighting circuit 80. By mounting the lighting circuit 80 of the light emitting diode 38 on the attachment 36 in this way, the number of parts can be reduced and a smaller vehicle lamp can be realized.

  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.

  In the above embodiment, the light emitting diode is used as the light source of the light emitting unit, but the light source is not limited to the light emitting diode. In the above-described embodiment, the shade and the mirror are exemplified as the optical member that controls the light distribution, but the optical member is not limited to these.

  10, 110 Vehicle lamp, 12 lamp body, 14 cover, 16 lamp chamber, 18 bracket, 20 lamp unit, 26 projection lens, 30, 130, 230, 330, 430, 530, 630 Light emitting unit, 32 Radiation fin, 34 Fan, 36 Attachment, 38 Light Emitting Diode, 39 Substrate, 40 Shade, 41 DC Motor, 42 Drive Unit, 43 Piezoelectric Actuator, 44 Power Feed Unit, 46 Spring Terminal, 48 Rotating Shaft, 52 Lead Screw, 54 Nut, 55 Stepping Motor, 58 mirrors, 65 shades, 70 reflectors, 80 lighting circuits.

Claims (6)

A light emitting unit having an attachment attached to a predetermined position of a lamp,
A light emitting element mounting portion;
An optical member;
A drive unit that drives the optical member to control the light distribution from the light emitting element;
A power feeding unit for feeding power to the light emitting element and the driving unit;
Is provided on the attachment.   The light emitting unit according to claim 1, wherein the optical member includes a shade that blocks part of light from the light emitting element. The shade is divided into a first sub-shade and a second sub-shade,
3. The light emitting unit according to claim 2, wherein a light distribution of the light from the light emitting element is changed by the drive unit changing an open state of the first subshade and the second subshade. 4. . The shade is a rotary shade capable of controlling light from the light-emitting elements into a plurality of light distributions by rotating,
The drive unit is a motor that rotationally drives the rotary shade;
The light emitting unit according to claim 2, wherein the rotation shade is disposed so that a rotation axis thereof coincides with a rotation axis of the motor. The optical member includes a mirror provided in the vicinity of the light emitting element,
The said drive part drives the said mirror so that it may take the 1st position which reflects the light from the said light emitting element, and the 2nd position which does not reflect the light from the said light emitting element. The light emitting unit according to 1.   A vehicle lamp comprising the light emitting unit according to claim 1.

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