JP4927660B2 - Vehicle lamp - Google Patents

Abstract

This invention relates to a vehicle lamp for preventing inclined motion part from upwardly moving when switching cables via installing a mechanism for transmitting cable motion on lower part thereon, wherein the inclined motion part (5) rotates relative to lamp chamber (2) in order to change illumination direction; and a regulation driving part (13) comprises a driving shaft (14) for leading the inclined motion part to vertically rotate via providing back and forth motion, a rotating pivot of the inclined motion part relative to the lamp chamber is disposed on upper part of connection point thereof with the driving shaft; cables (25) are disposed on the regulation driving part, providing motion power to the driving shaft on horizontal direction; a preloading unit (16) for preloading the driving shaft thereof toward the rear direction and then reverse the transmission part (28), in order to reverse the cable motion to the driving shaft the on horizontal direction.

Description

  The present invention relates to a vehicular lamp. More specifically, the present invention relates to a technical field that achieves both simplification of an irradiation direction changing mechanism and ensuring of safety in a vehicular lamp having an irradiation direction changing mechanism capable of changing an irradiation direction in the vertical direction during traveling.

  2. Description of the Related Art Some vehicle lamps, for example, automotive headlamps, have an irradiation direction changing mechanism that can change the irradiation direction in the vertical direction during traveling (see, for example, Patent Document 1). Such an irradiation direction changing mechanism is, for example, for changing the irradiation direction when the irradiation direction of the automotive headlamp is shifted up and down due to a change in the load, so that there is no hindrance to traveling. Is provided.

JP 2003-127760 A

  By the way, in the automotive headlamp described in Patent Document 1 described above, the irradiation direction is changed by electronic control. That is, the irradiation direction is changed using a motor as a drive source, and the motor is driven and controlled by remote operation.

  In the above-described irradiation direction changing mechanism by electronic control, motors and electronic parts are expensive, the manufacturing cost of automobile headlamps increases, and the structure of the irradiation direction changing mechanism is complicated. There's a problem.

  Therefore, as a method that does not rely on electronic control, for example, a spring means that resists the pulling force of the wire and the wire is used, and one of the upper and lower portions of the rotatable tilting member such as a lamp unit or a reflector is used as a rotation fulcrum. The other side is the point of action of the pulling force of the wire, the tilting member is rotated to one side when the wire is pulled, and the tilting member is rotated to the other side by using the biasing force of the spring means when the wire is loosened. Can be considered.

  In this case, if a rotation fulcrum is provided at the upper part of the tilting member and an action point of the wire is provided at the lower part of the tilting member, the tilting member is rotated downward by pulling the wire, and the irradiation direction is changed downward. When the wire is loosened, the tilting member is rotated upward and the irradiation direction is changed upward.

  However, if a wire cutting accident occurs, the tilting member is rotated upward to its rotating end by the biasing force of the spring means, and the irradiation direction becomes upward from the horizontal. Therefore, there is a possibility that a phenomenon that hinders traffic safety such as a dazzling light for an oncoming vehicle or the like or a light film phenomenon for the own vehicle may occur.

  Therefore, if a rotation fulcrum is provided at the lower part of the tilting member and an action point of the wire is provided at the upper part of the tilting member, the tilting member is rotated upward by pulling the wire, and the tilting member is loosened by the wire. Is rotated downward, and when the wire is cut, the tilting member is rotated downward to the rotational end, so that it is possible to avoid the occurrence of dazzling light and a photo film phenomenon.

  However, the upper rear part of the automotive headlamp has many structural parts such as a mounting part for the automotive headlamp with respect to the vehicle body, and has a space for arranging an irradiation direction changing mechanism for tilting the tilting member by the wire. It is a difficult place to secure. In particular, the slant trend of recent automotive headlamps, that is, the tendency of the front of automotive headlamps to be greatly inclined to move backward as they go upward due to a decrease in air resistance or design requirements, etc. Thus, it is more difficult to secure a space for arranging the irradiation direction changing mechanism between the upper rear surface of the automotive headlamp and the engine room.

  Therefore, in the vehicular lamp according to the present invention, the mechanism for transmitting the operation of the wire to the tilting member is disposed at the lower part of the lamp, and the upward tilting of the tilting member when the wire is cut is avoided. Let it be an issue.

In order to solve the above-described problems, a vehicular lamp has a tilting member that can be rotated in a lamp housing and changes an irradiation direction, and a drive shaft that moves in the front-rear direction and rotates the tilting member in the vertical direction. A wire for providing a leveling drive unit, a pivot fulcrum for the tilting member with respect to the lamp housing above a connection point with the drive shaft, and applying a moving force in the front-rear direction to the drive shaft to the leveling drive unit And an urging means for urging the drive shaft to the rear, and a reversal transmission portion for reversing the movement of the wire in the front-rear direction to transmit it to the drive shaft, thereby applying a tensile force to the wire. The drive shaft moves forward against the urging force of the urging means by releasing the tensile force on the wire. The shaft is moved rearward by the biasing force of the biasing means, rack teeth are formed on the drive shaft, a moving piece having rack teeth connected to one end of the wire is provided, and the rack of the drive shaft A reverse gear mechanism meshed with teeth and the rack teeth of the moving piece is provided, and the reverse gear mechanism is used as the reverse transmission portion .

  Therefore, in the vehicular lamp, the driving shaft moves forward against the urging force of the urging means by applying a tensile force to the wire, and the driving shaft is released by releasing the tensile force to the wire. It moves backward by the urging force of the urging means.

The vehicular lamp according to the present invention includes a tilting member that is rotatably disposed in the lamp housing and changes the irradiation direction by being rotated, and the tilting by the front end portion being connected to the tilting member and moving in the front-rear direction. A vehicle lamp comprising a leveling drive unit having a drive shaft for rotating the member in the vertical direction, wherein a rotation fulcrum of the tilting member with respect to the lamp housing is provided above a connection point with the drive shaft, The leveling drive unit includes a wire that imparts a moving force in the front-rear direction to the drive shaft, a biasing unit that biases the drive shaft rearward, and a reverse movement of the wire in the front-rear direction. A reverse transmission portion that transmits to the shaft, and the driving shaft is biased by the biasing means by applying a tensile force to the wire. Move forward while resisting, as the drive shaft by releasing the pulling force on the wire is moved backward by the biasing force of the biasing means, the rack teeth is formed on the drive shaft, the wire And a reversing gear mechanism meshed with the rack teeth of the driving shaft and the rack teeth of the moving piece, and a reversing gear mechanism as the reversing transmission portion. It is used .

Accordingly, it is possible to avoid the upward rotation of the tilting member at the time of cutting the wire after arranging a mechanism for transmitting the operation of the wire to the tilting member on the lower side of the lamp with sufficient space. Further, since the reverse transmission mechanism meshed with the rack teeth of the drive shaft and the rack teeth of the moving piece is used as the reverse transmission portion, the reverse transmission portion can be configured with a simple structure, and the manufacturing cost can be reduced. it can.

The best mode for carrying out the vehicular lamp of the present invention and a comparative example of the present invention will be described below.

  The automotive headlamp 1 includes a reflector 5 and a reflector 5 formed in a lamp space 4 defined by a lamp housing 2 formed in a container shape opened forward and a transparent cover 3 covering the opening of the lamp housing 2. The attached light source bulb 6 and the like are arranged.

  Insertion holes 7 a and 7 a (only one is shown in FIG. 1) are formed on the left side of the upper end portion of the rear surface portion 7 of the lamp housing 2 and the right side of the rear surface portion 7 near the lower end. A cover mounting hole 7 b is formed in the rear surface portion 7 of the lamp housing 2.

  The reflector 5 is provided with support protrusions 5a and 5a (only one is shown in FIG. 1) at the left position at the upper end and the right position at the lower end, and the support protrusions 5a and 5a are threaded. A hole is formed. A ball bearing portion 5b is provided at the lower end of the reflector 5 at a position directly below the upper support projection 5a.

  A bulb attachment hole 5c is formed at the rear end of the reflector 5, and a light source bulb 6 is attached to the bulb attachment hole 5c. The light source bulb 6 has a base portion 8. The base portion 8 has a flange portion 8a, a mounted portion 8b positioned on the front side of the flange portion 8a, and a cover mounting portion 8c positioned on the rear side of the flange portion 8a. is doing. The light source bulb 6 has a mounted portion 8 b attached to the light bulb mounting hole 5 c of the reflector 5.

  A rubber cover 9 that closes the cover mounting hole 7 b is attached to the rear surface portion 7 of the lamp housing 2. The rubber cover 9 is formed in a substantially annular shape, the inner peripheral part 10 is attached to the cover attaching part 8 c of the light source bulb 6, and the outer peripheral part 11 is attached to the opening edge of the cover attaching hole 7 b of the lamp housing 2.

  Adjustment shafts 12 and 12 are rotatably supported by insertion holes 7a and 7a formed in the rear surface portion 7 of the lamp housing 2, respectively. The adjustment shafts 12 and 12 are formed by integrally forming head portions 12a and 12a, which are operated portions, and screw shaft portions 12b and 12b, respectively. The adjustment shafts 12 and 12 are screwed into the screw holes of the support protrusions 5a and 5a of the reflector 5 in a state where the screw shaft portions 12b and 12b are inserted through the insertion holes 7a and 7a from the back side of the lamp housing 2, respectively. .

  A leveling drive unit 13 is attached to the lower end of the lamp housing 2, and the leveling drive unit 13 and the reflector 5 are connected. The leveling drive unit 13 includes a drive shaft 14 that moves in the front-rear direction, and a spherical body portion 14 a is integrally formed at the front end of the drive shaft 14. The drive shaft 14 is urged rearward by urging means described later. The drive shaft 14 is rotatably fitted to a ball bearing portion 5 b formed at a lower left portion on the back surface of the reflector 5, and the reflector 5 is connected to the leveling drive portion 13.

  When the upper left adjustment shaft 12 is rotated, the screw shaft portion 12b is screwed or unscrewed into the screw hole formed in the support protrusion 5a of the reflector 5 according to the rotation direction, and the upper left support protrusion. The position 5a is moved back and forth along the screw shaft portion 12b of the adjustment shaft 12. Accordingly, the reflector 5 tilts in the vertical direction about a line connecting the spherical portion 14a fitted to the ball bearing portion 5b of the lamp housing 2 and the insertion hole 7a at the lower right.

  On the other hand, when the adjustment shaft 12 at the lower right is rotated, the screw shaft portion 12b is screwed or screwed back into the screw hole formed in the support protrusion 5a of the reflector 5 according to the rotation direction, and the lower right support shaft is supported. The position of the protrusion 5 a is moved back and forth along the screw shaft portion 12 b of the adjustment shaft 12. Accordingly, the reflector 5 tilts in the left-right direction with a line connecting the spherical portion 14a fitted to the ball bearing portion 5b of the lamp housing 2 and the upper left insertion hole 7a as a rotation axis.

  Note that the leveling drive unit 13 may be provided as a drive source for performing an adjustment operation of the aiming adjustment mechanism. In this case, the aiming adjustment operation is performed in combination with the leveling adjustment operation by driving the leveling drive unit 13.

  The leveling drive unit 13 is provided with a wire 15, and the drive shaft 14 is moved back and forth by operating the wire 15. The leveling drive unit 13 is provided with a reversal transmission unit which will be described later, and the operation direction of the wire 15 is reversed by the reversal transmission unit and transmitted to the drive shaft 14. That is, when the wire 15 is pulled and moved backward, the drive shaft 14 moves forward against the urging force of the urging means provided in the leveling drive unit 13. On the other hand, when the wire 15 is loosened and moved forward, the drive shaft 14 moves backward by the biasing force of the biasing means. Accordingly, when the wire 15 is pulled, the drive shaft 14 moves forward, the lower end portion of the reflector 5 moves forward, the reflector 5 is tilted upward, and the irradiation direction is changed to the upward direction. On the contrary, when the wire 15 is loosened, the drive shaft 14 is moved rearward, the reflector 5 is tilted downward, and the irradiation direction is changed downward.

  Further, when the wire 15 has been cut, the drive shaft 14 is moved rearward by the urging force of the urging means, so that the irradiation direction is changed downward. Therefore, even if an unexpected situation such as cutting of the wire 15 occurs, the dazzling light on the oncoming vehicle or the like and the light film phenomenon on the own vehicle do not occur, and the safety of traffic is hindered by the irradiation light of the automotive headlamp 1. There is no such thing.

  Furthermore, in the automotive headlamp 1, since the tilt of the reflector 5 is performed by pulling or loosening the wire 15, the irradiation direction changing mechanism can be configured at low cost.

  In the above description, the reflector 5 is shown as an example of the tilting member that changes the irradiation direction by being rotated. However, the tilting member is not limited to the reflector. For example, the reflector, the light source, and the light source A lamp unit or the like in which a lens covering the front is integrally assembled may be used. Further, the tilting member only needs to be able to rotate in the vertical direction by moving the drive shaft in the front-rear direction, and as described above, the tilting member may be supported by the lamp housing via an intermediate member such as a bracket, or It may be directly supported by the lamp housing as long as it can be tilted with respect to the lamp housing.

  Next, a specific structure of the leveling drive unit 13 will be described.

2 and 3 show a leveling drive unit 13 according to a first comparative example of the present invention .

  The drive shaft 14 is supported by a case 13a (only a part is shown) so as to be movable in the front-rear direction. A compression coil spring 16 is supported between the flange 14b formed near the rear end of the drive shaft 14 and the case 13a in a state where the compression coil spring 16 is externally fitted to the drive shaft 14 as a biasing means for biasing the drive shaft 14 rearward. Has been.

  A moving piece 17 positioned substantially parallel to the rear end portion of the drive shaft 14 is supported on the case 13a so as to be movable in the front-rear direction, and one end portion of the wire 15 is connected to the moving piece 17.

  A reversing link 18 that functions as a reversing transmission portion is supported on the case 13a so as to be rotatable about a substantially central portion. One end portion 18 a of the reversing link 18 is rotatably connected to the rear end portion of the drive shaft 14, and the other end portion 18 b is rotatably connected to the drive piece 17.

  In the leveling drive unit 13, when the wire 15 is pulled (see arrow A in FIG. 2), the reverse link 18 rotates in the R1 direction shown in FIG. 2, and the one end 18a moves substantially forward. Accordingly, the drive shaft 14 moves forward (see arrow B in FIG. 2) while contracting the compression coil spring 16.

  On the contrary, when the wire 15 is loosened, the force that has shrunk the compression coil spring 16 is removed, so that the compression coil spring 16 expands and the drive shaft 14 moves rearward (see arrow C in FIG. 3). Accordingly, the reverse link 18 rotates in the direction R2 shown in FIG. 3, and the wire 15 is moved forward (see arrow D in FIG. 3).

  The reversing transmission unit using such a reversing link 18 has a simple structure, can be constructed at low cost, and has few failures.

4 and 5 show a leveling drive unit 23 according to the first best mode of the present invention .

  The drive shaft 24 is supported by a case 23a (only a part is shown) so as to be movable in the front-rear direction. A compression coil spring 26 is supported between the flange 24b formed near the rear end of the drive shaft 24 and the case 23a in a state where a compression coil spring 26 is externally fitted to the drive shaft 24 as a biasing means for biasing the drive shaft 24 rearward. Has been.

  The drive shaft 24 is integrally formed with a spherical portion 24a at the front end thereof. Rack teeth 24c are formed in the rear portion of the drive shaft 24 from the flange 24b.

  A moving piece 27 located substantially parallel to the rear end portion of the drive shaft 24 is supported on the case 23a so as to be movable in the front-rear direction, and one end portion of a wire 25 is connected to the moving piece 27. A rack tooth 27 a is formed on the moving piece 27 at a portion facing the rack tooth 24 c of the drive shaft 24.

  The rack teeth 24c and 27a mesh with a reversing gear mechanism 28 that functions as a reversal transmission unit. The reverse gear mechanism 28 is configured as one pinion gear rotatably supported by the case 23a, and two rack teeth 24c and 27a are meshed with the pinion gear from the opposite sides.

  In the leveling drive unit 23, when the wire 25 is pulled (see arrow A in FIG. 4), the moving piece 27 moves rearward, and the pinion gear 28 engaged with the rack teeth 27a of the moving piece 27 is illustrated. Rotate in the R1 direction shown in FIG. When the pinion gear 28 rotates in the R1 direction, the rack teeth 24c of the drive shaft 24 meshing with the pinion gear 28 are sent forward. Accordingly, the drive shaft 24 moves forward (see arrow B in FIG. 4) while contracting the compression coil spring 26.

  On the other hand, when the wire 25 is loosened, the force that has shrunk the compression coil spring 26 is removed, so the compression coil spring 26 expands and the drive shaft 24 moves rearward (see arrow C in FIG. 5). Accordingly, the reverse gear mechanism 28 rotates in the R2 direction shown in FIG. 5, and the wire 25 is moved forward (see arrow D in FIG. 5).

  The reverse transmission unit using such a pinion and rack mechanism has a simple structure, can be constructed at low cost, and has few failures.

  In the above-described best mode, an example in which the reversing gear mechanism 28 is configured by one pinion gear has been described. However, the reversing gear mechanism 28 is not limited to one pinion gear. For example, a plurality of gears may be combined. Then, the movement of the wire 25 may be reversed and transmitted to the drive shaft 24.

6 and 7 show a leveling drive unit 33 according to the second best mode of the present invention .

  The drive shaft 34 is supported by a case 33a (only a part is shown) so as to be movable in the front-rear direction. A compression coil spring 36 is supported between the flange 34b formed at a substantially central portion of the drive shaft 34 and the case 33a in a state where the compression coil spring 36 is externally fitted to the drive shaft 34 as a biasing means for biasing the drive shaft 34 rearward. Has been.

  The drive shaft 34 is integrally formed with a spherical portion 34a at the front end thereof. The rear end portion of the drive shaft 34 is vertically separated as bifurcated portions 34c and 34c and extends rearward. Rack teeth 34d and 34d are formed on the mutually opposed surfaces of the bifurcated portions 34c and 34c, respectively. Yes.

  A moving piece 37 positioned between the two crotch portions 34d and 34d of the drive shaft 34 is supported by the case 33a so as to be movable in the front-rear direction, and one end of a wire 35 is connected to the moving piece 37. In the moving piece 37, rack teeth 37a and 37a are formed at portions facing the two crotch portions 34d and 34d of the drive shaft 34, respectively.

  A support member 33b extending vertically is provided in the case 33a, and pinion gears 38, 38 are rotatably supported by the support member 33b so as to be spaced apart from each other vertically.

  One rack tooth 34d, 37a and the other rack tooth 34d, 37a are engaged with pinion gears 38, 38, respectively, and the pinion gears 38, 38 constitute a reverse transmission portion.

  In the leveling drive unit 33, when the wire 35 is pulled (see arrow A in FIG. 6), the moving piece 37 moves rearward, and the pinion gear 38 meshes with the rack teeth 37a, 37a of the moving piece 37. , 38 rotate in the R1 direction shown in FIG. 6, and the other rotates in the R2 direction shown in FIG. When the pinion gears 38 and 38 are rotated, the rack teeth 34d and 34d of the drive shaft 34 meshing with the pinion gears 38 and 38 are fed forward. Accordingly, the drive shaft 34 moves forward (see arrow B in FIG. 6) while contracting the compression coil spring 36.

  On the other hand, when the wire 35 is loosened, the force that has shrunk the compression coil spring 36 is removed, so the compression coil spring 36 expands and the drive shaft 34 moves rearward (see arrow C in FIG. 7). Accordingly, the pinion gears 38 and 38 are respectively rotated in the opposite directions, and the wire 35 is moved forward (see arrow D in FIG. 7).

8 and 9 show a leveling drive unit 43 according to a second comparative example of the present invention .

  The drive shaft 44 is supported by a case 43a (only a part is shown) so as to be movable in the front-rear direction. A compression coil spring 46 is supported between the flange 44b formed at a substantially central portion of the drive shaft 44 and the case 43a in a state where the compression coil spring 46 is externally fitted to the drive shaft 44 as a biasing means for biasing the drive shaft 44 rearward. Has been.

  The drive shaft 44 is integrally formed with a spherical portion 44a at the front end thereof. A wire connecting portion 44c is provided at the rear end portion of the drive shaft 44, and one end portion of the wire 45 is connected to the wire connecting portion 44c.

  A pulley 47 is rotatably supported by the case 43a at a position in front of the wire connecting portion 44c. The wire 45 is wound around a pulley 47.

  In the leveling drive unit 43, when the wire 45 is pulled backward (see arrow A in FIG. 8), one end of the drive shaft 44 connected to the wire connection unit 44 c moves forward, and the drive shaft 44 moves to the drive shaft 44. A forward moving force is generated. Accordingly, the drive shaft 44 moves forward (see arrow B in FIG. 8) while contracting the compression coil spring 46.

  On the contrary, when the wire 45 is loosened, the force that has shrunk the compression coil spring 46 is removed, so that the compression coil spring 46 expands and the drive shaft 44 moves rearward (see arrow C in FIG. 9). Accordingly, one end of the wire 45 connected to the drive shaft 44 moves rearward, and a portion extending rearward from the pulley 47 moves forward (see arrow D in FIG. 9).

10 and 11 show a leveling drive unit 53 according to a third comparative example of the present invention .

  The drive shaft 54 is supported by a case 53a (only a part is shown) so as to be movable in the front-rear direction. A compression coil spring 56 is supported between the flange 54b formed near the rear end of the drive shaft 54 and the case 53a in a state where the compression coil spring 56 is externally fitted to the drive shaft 54 as a biasing means for biasing the drive shaft 54 rearward. Has been.

  The drive shaft 54 is integrally formed with a spherical portion 54a at the front end thereof.

  In the case 53a, a moving piece 57 positioned substantially coaxially with the driving shaft 54 is supported behind the driving shaft 54 so as to be movable in the front-rear direction, and one end of a wire 55 is connected to the moving piece 57. ing.

  The drive shaft 54 and the moving piece 57 are connected by a double pantograph-like reverse transmission portion 58. The reverse transmission part 58 includes fixed links 58a and 58b that are pivotally connected to each other so that the case 53a has a substantially X-shape and is substantially X-shaped, and ends positioned on the front side of the fixed links 58a and 58b. The front movable links 58c and 58c, each having one end rotatably connected thereto, and the rear movable links 58d each having one end rotatably connected to the rear ends of the fixed links 58a and 58b. , 58d. The reverse transmission portion 58 is configured such that the other end portions of the front movable links 58 c and 58 c are rotatably connected to the rear end portion of the drive shaft 54, and the other end portions of the rear movable links 58 d and 58 d are the front end portions of the moving piece 57. Is pivotally connected to the motor.

  In the leveling drive unit 53, when the wire 55 is pulled (see arrow A in FIG. 10), the moving piece 57 moves rearward and other than the rear movable links 58d and 58d connected to the moving piece 57. Since the end portion moves rearward along with the moving piece 57, the end portion located on the rear side of the fixed links 58a and 58b connected to one end portion of the rear movable links 58d and 58d is moved rearward, and the fixed link The interval between the end portions located on the rear side of 58a and 58b is narrowed, and the end portion located on the front side of the fixed links 58a and 58b is moved forward, and the interval is reduced. Accordingly, the distance between the one end portions of the front movable links 58c and 58c is narrowed, the other end portions of the front movable links 58c and 58c are moved forward, and the drive shaft 54 is moved forward while the compression coil spring 56 is contracted (see arrow B in FIG. 10). Move to).

  On the other hand, when the wire 55 is loosened, the force that has shrunk the compression coil spring 56 is removed, so the compression coil spring 56 expands and the drive shaft 54 moves rearward (see arrow C in FIG. 11). Accordingly, the other end portions of the front movable links 58c and 58c of the reverse transmission portion 58 move rearward, and the distance between the end portion located on the front side and the end portion located on the rear side of the fixed links 58a and 58b is increased. The other end of the side movable links 58d, 58d moves forward, and the wire 55 moves forward (see arrow D in FIG. 11).

12 and 13 show a leveling drive unit 63 according to a fourth comparative example of the present invention .

  The drive shaft 64 is supported by a case 63a (only a part is shown) so as to be movable in the front-rear direction. A compression coil spring 66 is externally fitted to the drive shaft 64 as a biasing means for biasing the drive shaft 64 rearward between the flange 64b formed at a position near the rear end of the drive shaft 64 and the case 63a. It is supported by.

  A rear end portion 64c located on the rear side of the flange 64b of the drive shaft 64 is formed in a substantially cylindrical shape. The drive shaft 64 is integrally formed with a spherical portion 64a at the front end thereof.

  On the case 63a, a substantially columnar moving piece 67 located substantially coaxially with the drive shaft 64 is supported behind the drive shaft 64 so as to be movable in the front-rear direction. One end of a wire 65 is connected to the moving piece 67.

  The rear end portion 64 c of the drive shaft 64 and the moving piece 67 are connected by a reverse transmission portion 68. The reverse transmission portion 68 includes a rotating member 68 a formed in a substantially cylindrical shape, a sliding pin 64 d erected on the rear end portion 64 c of the drive shaft 64, and a sliding pin 67 a erected on the moving piece 67. Has been. The rotating member 68a is supported by the case 63a so as to be rotatable and immovable in the front-rear direction. The rotation member 68a is formed with guide holes 68b and 68c positioned in a substantially square shape.

  The drive shaft 64 is not rotatable. The drive shaft 64 has a rear end portion 64c slidably inserted into a front portion of the rotating member 68a, and a slide pin 64d is slidably engaged with the guide hole 68b. The moving piece 67 is slidably inserted into the rear portion of the rotating member 68a, and the sliding pin 67a is slidably engaged with the guide hole 68c.

  In the leveling drive unit 63, when the wire 65 is pulled backward (see arrow A in FIG. 12), the moving piece 67 moves backward, and the sliding pin 67 a of the moving piece 67 is connected to the reverse transmission unit 68. The sliding hole 68c of the rotating member 68a slides backward. At this time, since the moving piece 67 does not rotate, the rotating member 68a rotates in the direction of the arrow in FIG. When the rotating member 68a rotates in the direction of the arrow in FIG. 12, the sliding pin 64d of the drive shaft 64 is moved from the rear end to the front end through the guide hole 68b, and the drive shaft 64 retracts forward (see FIG. 12). Move to arrow B).

  On the contrary, when the wire 65 is loosened, the force that has shrunk the compression coil spring 66 is removed, so that the compression coil spring 66 expands and the drive shaft 64 moves rearward (see arrow C in FIG. 13). Therefore, the sliding pin 64d provided on the drive shaft 64 slides from the front side to the rear side through the guide hole 68b of the rotating member 68a. Since the drive shaft 64 does not rotate, the rotating member 68a rotates in the direction of the arrow in FIG. When the rotating member 68a rotates in the direction of the arrow in FIG. 13, the sliding pin 67a is moved from the rear side to the front side through the guide hole 68c, the moving piece 67 moves forward, and the wire 65 moves forward (arrow D in FIG. 13). Browse).

It should be noted that the specific structures and shapes of the respective parts shown in the first and second best modes of the present invention described above are merely examples of embodiments for carrying out the present invention. Therefore, the technical scope of the present invention should not be limitedly interpreted.

FIG. 2 to FIG. 13 show a best mode in which the vehicular lamp of the present invention is applied to an automotive headlamp and a comparative example of the present invention , and this figure is a schematic sectional view of the automotive headlamp. . FIG. 3 shows a leveling drive unit according to a first comparative example of the present invention together with FIG. 3, and is a schematic side view showing a state in which the drive shaft has advanced. It is a schematic side view which shows the state which the drive shaft retracted | retreated. FIG. 5 shows the leveling drive unit according to the first best mode of the present invention together with FIG. 5, and is a schematic side view showing a state in which the drive shaft has advanced. It is a schematic side view which shows the state which the drive shaft retracted | retreated. FIG. 8 shows a leveling drive unit according to the second best mode of the present invention together with FIG. 7, and is a schematic side view showing a state in which the drive shaft has advanced. It is a schematic side view which shows the state which the drive shaft retracted | retreated. FIG. 9 shows a leveling drive unit according to a second comparative example of the present invention together with FIG. 9, and is a schematic side view showing a state in which the drive shaft has advanced. It is a schematic side view which shows the state which the drive shaft retracted | retreated. FIG. 11 shows a leveling drive unit according to a third comparative example of the present invention together with FIG. 11, and is a schematic side view showing a state in which the drive shaft has advanced. It is a schematic side view which shows the state which the drive shaft retracted | retreated. FIG. 13 shows a leveling drive unit according to a fourth comparative example of the present invention together with FIG. 13, and is a schematic side view showing a state in which the drive shaft has advanced. It is a schematic side view which shows the state which the drive shaft retracted | retreated.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Automotive headlamp (vehicle lamp), 2 ... Lamp housing, 5 ... Reflector (tilting member), 23 ... Leveling drive part, 24 ... Drive shaft, 25 ... Wire, 26 ... Compression coil spring (biasing means) , 28 ... reverse gear mechanism (reverse transmission part), 33 ... leveling drive part, 34 ... drive shaft, 35 ... wire, 36 ... compression coil spring (biasing means), 38 ... pinion gear (reverse transmission part)

Claims (1)

A tilting member that is rotatably arranged in the lamp housing and changes the irradiation direction by rotating, and a front end portion connected to the tilting member and moves in the front-rear direction to rotate the tilting member in the vertical direction. A vehicle lamp comprising a leveling drive unit having a drive shaft to be driven,
A pivot point of the tilting member with respect to the lamp housing is provided above a connection point with the drive shaft;
The leveling drive unit includes a wire that imparts a moving force in the front-rear direction to the drive shaft, a biasing unit that biases the drive shaft rearward, and a reverse movement of the wire in the front-rear direction. A reversing transmission part that transmits to the shaft,
By applying a tensile force to the wire, the drive shaft moves forward against the urging force of the urging means, and by releasing the tensile force to the wire, the drive shaft is moved to the urging means. To move backward by the biasing force ,
Forming rack teeth on the drive shaft;
One end of the wire is connected to provide a moving piece having rack teeth,
A reversing gear mechanism meshed with the rack teeth of the drive shaft and the rack teeth of the moving piece;
A vehicle lamp characterized in that the reverse gear mechanism is used as the reverse transmission portion .

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