JP2013164933A - Vehicle lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lamp having a leveling device capable of making a shaft move back and forth in an axial direction on each case of a manual operation and an electric operation and making the tip of the shaft connect with a lamp unit via a ball joint.SOLUTION: A shaft 61 is supported with a cylindrical rod 71 for inserting the shaft 61 and a case 63 via a cylindrical gear 72 for inserting the rod 71, and the rod 71 is engaged with the shaft 61 in order to regulate rotation of the rod around the shaft against the case 63 and move the rod in an axial direction. Rotation of the shaft 61 by the manual operation makes the shaft 61 move back and forth in the axial direction. The gear 72 is engaged with the case 63, and follows the axial direction movements of the rod 71 according to axial direction movements of the gear 72 against the case 63. Rotation of the gear 72 by the electric operation makes axial direction movements of the rod 71 and the shaft 61.

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp that includes an optical axis adjustment mechanism.

  For example, a headlamp of a vehicle includes a lamp unit (for example, a projector type, a reflector type, a direct type lamp unit, etc.) having a light source in a lamp chamber configured by closing a front lens at an opening of a housing. Is arranged and configured. Light from the light source of the lamp unit is emitted to the front of the vehicle through the front lens.

  In this case, the lamp unit is mounted via a housing and an optical axis adjustment mechanism, and by this optical axis adjustment mechanism, fine movement adjustment is performed to tilt the lamp unit, and the optical axis of the lamp unit is moved in the vertical and horizontal directions. Can be adjusted.

  In other words, three optical axis adjusting mechanisms are provided between the housing and the lamp unit, for example, at each vertex of a virtual triangle drawn with a light source in between, one of which swings the reflector with respect to the housing. It is constituted by a rotational support shaft portion made of, for example, a ball joint that is movably supported, and the other two are attached with a leveling device having an aiming function and an aiming mechanism as disclosed in, for example, Patent Document 1 below, The leveling device fixed to the housing and the rotating shaft (shaft) of the aiming mechanism are screwed into a nut portion provided in the lamp unit.

  The optical axis adjusting mechanism configured as described above can finely move a portion where the nut portion of the lamp unit is provided by operating a leveling device having an aiming function and a rotating shaft (shaft) of the aiming mechanism. . As a result, the inclination of the lamp unit can be varied around the location where the rotation support shaft portion is provided, and the optical axis of the reflector can be adjusted in the vertical direction.

  In addition, the leveling device and aiming mechanism having an aiming function disclosed in Patent Document 1 have a configuration in which the rotating shaft can be operated manually or electrically. For example, the optical axis of the lamp unit The initial setting is manually performed, and the optical axis of the lamp unit corresponding to the change in the posture of the vehicle can be adjusted electrically by a motor.

  Moreover, as a prior art relevant to this invention, there exists a leveling apparatus disclosed by the following patent document 2, for example. In this leveling device, the shaft of the leveling device can be moved back and forth or retracted by pulling back or pulling out the built-in wire, and the tip of the shaft is connected to the ramp unit via a so-called ball joint. Yes.

JP 2008-126948 A JP 2010-165566 A

  However, the leveling device and aiming mechanism having the aiming function of the vehicular lamp disclosed in Patent Document 1 has a configuration in which the tip of the shaft is screwed into a nut portion provided in the lamp unit. When the shaft is rotated, the inclination of the lamp unit is varied by moving the nut portion back and forth in the axial direction of the shaft.

  For this reason, in order for the shaft to be able to rotate smoothly with respect to the nut portion of the lamp unit, there are inconveniences that the leveling device and aiming mechanism for the lamp unit are restricted and the assembly accuracy is not sufficient. .

  On the other hand, in the leveling device for a vehicle lamp shown in Patent Document 2, the shaft advances and retreats by rotation of the shaft, and the tip of the shaft is connected to the lamp unit via a so-called ball joint. The leveling device is provided with a certain degree of margin in the place where the leveling device is mounted on the lamp unit.

  However, the leveling device for a vehicular lamp disclosed in Patent Document 2 includes a mechanism in which the shaft is advanced and retracted only by manual operation, and is configured such that the shaft cannot be advanced and retracted electrically.

The present invention has been made in view of such circumstances, and its purpose is to allow the shaft to advance and retreat in the axial direction both manually and electrically, and the tip of the shaft is connected to the lamp unit via a ball joint. An object of the present invention is to provide a vehicular lamp including an optical axis adjusting mechanism that can be connected.
Another object of the present invention is to provide a vehicular lamp that can suppress the rotation of the shaft due to vibration, prevent unintentional deviation of the optical axis, and keep the optical axis of the lamp unit at a predetermined position. It is to provide.

  In order to achieve such an object, according to the present invention, in a leveling device, the shaft is supported by a housing with a cylindrical rod inserted through the shaft and a cylindrical gear inserted through the rod. The shaft is screwed with the shaft so that the rotation around the axis is restricted with respect to the housing and the axial movement can be performed. The gear is screwed into a housing and is configured to follow the movement of the rod in the axial direction as the gear moves in the axial direction relative to the housing. The motor-driven rotation causes the rod and the shaft to advance and retreat in the axial direction.

  By configuring in this way, the shaft can be advanced and retracted both manually and electrically, and by connecting the shaft to the lamp unit via a ball joint, a margin is provided in the location of the leveling device with respect to the lamp unit. Can be given.

The present invention is grasped by the following composition.
(1) In the vehicular lamp according to the present invention, a lamp unit is disposed in a lamp chamber composed of a housing and a front lens, and the lamp unit is attached via the housing and an optical axis adjustment mechanism, and the optical axis adjustment mechanism Is a vehicular lamp configured to include at least a leveling device. In the leveling device, a shaft supported by a housing of the leveling device is connected to the lamp unit via a ball joint, and the shaft is inserted through the shaft. A cylindrical rod that rotates and a cylindrical gear that passes through the rod are supported by the housing, the rod is screwed to the shaft, and the shaft rotates around the shaft. By being restricted and configured to move in the axial direction, the shaft is manually rotated to the axial direction of the shaft. The gear is screwed with the housing and configured to follow the movement of the rod in the axial direction as the gear moves in the axial direction with respect to the housing. It is characterized in that the rod and the shaft are advanced and retracted in the axial direction by the electric rotation of the gear.
(2) In the vehicular lamp of the present invention, in the configuration of (1), the ball joint includes a ball portion formed on one of the shaft and the lamp unit, and the shaft and the lamp unit. The vehicular lamp according to claim 1, wherein the vehicular lamp is formed by a ball socket portion that is formed on the other side and encloses the ball portion.
(3) The vehicular lamp of the present invention is characterized in that, in the configuration of (2), the ball portion has a polygonal cross section in the axial direction.

  According to the vehicular lamp configured as described above, the leveling device can be provided in which the shaft can be moved back and forth in the axial direction both manually and electrically, and the tip of the shaft can be connected to the lamp unit via the ball joint. Will be able to.

It is a block diagram which shows Embodiment 1 of the leveling apparatus with which the vehicle lamp of this invention is equipped. It is a block diagram which shows Embodiment 1 of the vehicle lamp of this invention. It is an external view which shows Embodiment 1 of the leveling apparatus with which the vehicle lamp of this invention is equipped. It is explanatory drawing which shows operation | movement of Embodiment 1 of the leveling apparatus with which the vehicle lamp of this invention is equipped. It is the figure which expanded and showed the shaft and the 1st rod of the leveling apparatus with which the vehicle lamp of this invention is equipped. It is the figure which showed the relationship between the 1st rod of the leveling apparatus with which the vehicle lamp of this invention is equipped, and a housing | casing (front case). It is the figure which showed the relationship between the gearwheel of the leveling apparatus with which the vehicle lamp of this invention is equipped, and a front case. It is a perspective view which shows the high end part of the shaft of the leveling apparatus with which the vehicle lamp of this invention is equipped. It is explanatory drawing which shows Embodiment 1 of the leveling apparatus with which the vehicle lamp of this invention is equipped.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.
(Embodiment 1)
<Overall configuration>
Fig.2 (a) is sectional drawing which shows Embodiment 1 of the vehicle lamp of this invention. The vehicle lamp shown in FIG. 2A shows, for example, a headlamp (headlight), and the left side in the figure is the front direction of the vehicle.

  In FIG. 2A, the vehicular lamp 1 forms a lamp chamber 30 with a housing 10 that is open on the front side of the vehicle and a front lens 20 that closes the opening of the housing 10. A groove portion 11 is formed along the periphery of the opening of the housing 10, and the front lens 20 is inserted into the groove portion 11 at the periphery thereof, and the housing 10 is sealed with a sealing material 12 previously applied to the groove portion 11. The opening is sealed.

  A lamp unit is arranged in the lamp chamber 30. Here, in FIG. 2A, the drawing of the lamp unit is omitted, and a bracket 40 formed integrally with the component of the lamp unit or attached to the lamp unit is shown. The bracket 40 is attached to the housing 10 via an optical axis adjustment mechanism 50 (50A, 50B). The bracket 40 can be slightly tilted by the optical axis adjusting mechanism 50 (50A, 50B), and the direction of the optical axis of the lamp unit fixed to the bracket 40 can be changed. The lamp unit may be any lamp unit such as a projector type, a reflector type, and a direct-light type. FIG. 2B is a view of the vehicular lamp 1 as seen from the front of the vehicle. The optical axis adjusting mechanism 50 includes a rotating support shaft portion 50A, a leveling device 50B for adjusting the vertical direction, and an adjustment in the horizontal direction. It is comprised from the aiming mechanism 50B 'to perform. The rotary support shaft portion 50A is disposed, for example, on the upper right side in the drawing with respect to the light source 41, the leveling device 50B is, for example, on the lower right side in the drawing, and the aiming mechanism 50B ′ is, for example, in the drawing with respect to the light source 41. It is arranged on the upper left. Such an optical axis adjusting mechanism 50 (50A, 50B, 50B ′) is a horizontal connection between the housing 10 and the leveling device 50B or the aiming mechanism 50 ′ by independently operating the leveling device 50B and the aiming mechanism 50B ′. The distance in the direction (the front and back direction in FIG. 2B) can be adjusted, and the inclination of the lamp unit about the rotation support shaft portion 50A can be adjusted. The leveling device 50B is configured to be driven manually and electrically as will be apparent from the following description. Note that the cross-sectional view of FIG. 2A corresponds to the cross section taken along the line aa of FIG.

  As shown in FIG. 2A, the rotation support shaft portion 50 </ b> A includes a spherical support shaft 51 screwed into the bracket 40 and a spherical bearing portion 52 fixed to the housing 10. At the tip of the sphere support shaft 51, a sphere portion 51A having a diameter larger than the diameter of the sphere support shaft 51 is provided, and the sphere bearing portion 52 is provided with a spherical recess 52A containing the sphere portion 51A. . In the rotation support shaft portion 50A configured in this way, for example, the sphere support shaft 51 can rotate within a certain range with respect to the sphere bearing portion 52, whereby the bracket 40 is rotated relative to the housing 10. It can be rotated within a certain range around 50A.

  Further, as shown in FIG. 2, the leveling device 50B is used by being attached to the housing 10, and the shaft 61 of the leveling device 50B extends toward the bracket 40, and the tip thereof is larger than the diameter of the shaft 61. A ball portion 61A having a diameter, for example, a spherical portion is formed.

  The ball portion 61A is included in a spherical concave portion 53A formed in a ball socket portion 53 made of, for example, a spherical bearing portion attached to the bracket 40. Thereby, the ball portion 61A can rotate within a certain range with respect to the spherical concave portion 53A. That is, the tip of the shaft 61 of the leveling device 50B and the bracket 40 are connected via a so-called ball joint. This means that the shaft 61 of the leveling device 50B can be swung at a certain range of angle with respect to the axial direction of the ball socket portion 53 at a fixed position, and as a result, allowance is placed on the arrangement of the leveling device 50B. There will be an effect to give it.

Here, in the leveling device 50B, the shaft 61 can be advanced and retracted in the longitudinal direction (α direction in the drawing), whereby the ball socket portion 53 is advanced and retracted in the movement direction of the shaft 61, and the bracket 40 Can be tilted in the β direction in the figure around the rotation shaft 50A. Further, the leveling device 50B incorporates a motor (indicated by reference numeral 82 in FIG. 1B), and the shaft 61 can be advanced and retracted by driving the motor 82 by a control device of an auto leveling system (not shown). ing. Further, the leveling device 50B includes a rotary knob 62, and the shaft 61 can be advanced and retracted by rotating the rotary knob 62. As a result, the vehicular lamp 1 including such a leveling device 50B is configured to manually perform initial setting of the optical axis of the lamp unit, for example, and adjust the optical axis of the lamp unit in response to a change in the attitude of the vehicle. It can comprise so that it can carry out electrically by.
<Leveling device>
FIG. 3 is an external view showing the leveling device 50B. The leveling device 50B includes a housing 63. The housing 63 has a front case 63A disposed on the front end side (the side on which the ball portion 61A is formed) of the shaft 61 and a rear end side (not shown) of the shaft 61. And the rear case 63B arranged in the middle). A rotation knob 62 is mounted on the extension line of the shaft 61 of the rear case 63B, and a mechanism for moving the shaft 61 back and forth in the α direction in the figure by the rotation of the rotation knob 62 in the figure in the figure is built in the housing 63. Has been. Further, a housing (indicated by reference numeral 82 in FIG. 1B) and a mechanism for moving the shaft 61 in the α direction in the figure by driving the motor 82 are built in the housing 63.

  FIG. 1A is a view showing a cross section taken along line I (b) -I (b) in FIG. Note that the leveling device 50B shown in FIG. 1A shows a state in which the spherical concave portion 53A of the ball socket portion 53 is fitted to the ball portion 61A formed at the tip of the shaft 61.

  In the leveling device 50B shown in FIG. 1 (a), the left side in the drawing is the front portion, the right side in the drawing is the rear portion, and the left side in the drawing is also the front end in each member constituting the leveling device 50B. The middle right end is used as the rear end.

  In FIG. 1A, first, the shaft 61 is supported between the front case 63A and a cylindrical first rod 71 and a cylindrical gear 72 in this order from the shaft 61 side. . Further, the shaft 61 is supported by a cylindrical shaft body portion 62A of the rotary knob 62 interposed between the rear case 63B and the shaft 61.

  As shown in FIG. 5, a screw hole 71S is formed on the inner peripheral surface of the first rod 71, and a screw portion 61S formed on the outer peripheral surface of the shaft 61 inserted through the first rod 71 is the screw hole 71S. Are screwed together.

  Further, as shown in FIG. 6, the first rod 71 is configured to be slidable in the axial direction with respect to the front case 63A, and the rotation around the axis is restricted. The restriction around the axis of the first rod 71 with respect to the front case 63A is such that the protrusion 71N extending in the axial direction at the tip of the first rod 71 (the end on the ball portion 61A side of the shaft 61) is the front case 63A. This is achieved by being inserted into a groove 63D formed on the inner peripheral surface of the bearing hole. Thus, when the shaft 61 is rotated around the axis, the shaft 61 can advance and retract in the axial direction with respect to the first rod 71.

  The gear 72 is disposed through the first rod 71 and is disposed so as to be rotatable with respect to the first rod 71. The gear 72 extends out of the space between the first rod 71 and the front case 63A at the screw portion 72S disposed between the first rod 71 and the front case 63A, and at the rear end of the screw portion 72S. The gear forming portion 72T has an inner diameter and an outer diameter larger than the screw portion 72S.

  The gear 72 has a screw portion 72S screwed into a screw hole 63E formed on the inner peripheral surface of the bearing hole of the front case 63A. In this case, the axial length L1 of the screw portion 72S is the axial length of the screw hole 63E, as shown in FIG. 7 in an enlarged manner, the screw portion 72S of the gear 72 and the screw hole 63E of the front case 63A. It is smaller than L2. Thereby, when the gear 72S rotates, it can move within a certain range in the axial direction with respect to the front case 63. The gear forming portion 72T of the gear 72 is formed by, for example, teeth extending substantially in the axial direction on the outer peripheral surface of the gear 72 arranged side by side in the circumferential direction.

  As shown in FIG. 1B, the gear 72 has a gear forming portion 72T meshed with a worm gear 81. The worm gear 81 includes a first gear 83 and a second gear 84 that rotate the motor 82. Thus, the gear 72 is rotated around the first rod 71.

  The gear 72 that passes through the first rod 71 includes a protrusion 71 </ b> A formed along the circumferential direction of the first rod 71 and a cylindrical second rod 85 inserted into the rear end of the first rod 71. It is comprised so that it may be pinched loosely between. The second rod 85 has an inner diameter slightly larger than the outer diameter of the first rod 71 and an outer diameter slightly smaller than the inner diameter of the gear forming portion 72T of the gear 72, and the gear forming portion 72T of the first rod 71 and the gear 72 It is arranged between. The second rod 85 is formed with a protrusion 85A along the circumferential direction on the inner peripheral surface thereof, and the protrusion 85A is engaged with the recess 71B along the circumferential direction on the outer peripheral surface of the first rod 71. It has become so. Accordingly, the movement of the gear 72 in the axial direction with respect to the first rod 71 is restricted by the protrusion 71 </ b> A and the second rod 85. Accordingly, the gear 72 can follow the movement of the first rod 71 in the same direction when it moves in the axial direction.

For this reason, when the gear 72 rotates, the gear 72 can advance and retract in the axial direction with respect to the front case 63A by the threaded portion 72S of the gear 72 and the screw hole 63E formed in the front case 63A. ing. In this case, since the first rod 71 and the second rod 85 are configured to sandwich the gear 72, the first rod 71 and the second rod 85 can also advance and retreat in the axial direction in accordance with the advance and retreat of the gear 72. It has become. Since the first rod 71 is engaged with the shaft 61 inserted into the first rod 71 by the screw portion 61S and the screw hole 71S, the shaft 61 also moves in the axial direction according to the advance / retreat of the first rod 71. You can move forward and backward.
The rear end portion of the shaft 61 is inserted into the shaft body portion 62A of the rotary knob 62, and the shaft body portion 62A of the rotary knob 62 is inserted into the bearing hole of the rear case 63B.

  As shown in FIG. 8, the rear end portion of the shaft 61 has a polygonal cross section (for example, hexagonal in the drawing), and the shaft of the rotary knob 62 into which the rear end portion of the shaft 61 is inserted. The hole 62H of the body 62A has a corresponding shape. Thus, by rotating the rotary knob 62, the shaft 61 can be rotated accordingly.

  The hole 62H of the shaft body portion 62A of the rotary knob 62 does not come out of the rear end portion 61L of the shaft 61 even if the shaft 61 is moved in the axial direction with respect to the rotary knob 62. It is formed with a sufficient length.

  The rotary knob 62 is provided with an O-ring 62N made of rubber along the axial direction on the outer peripheral surface of the shaft body portion 62A. The O-ring 62N is formed on the inner peripheral surface of the bearing hole of the rear case 63B. The recess 63F is accommodated relatively loosely. Thereby, the movement of the rotary knob 62 in the axial direction is restricted, and the rotary knob 62 can be rotated around the axis.

  The rotary knob 62 configured in this way can rotate the shaft 61 by rotating it. In this case, since the protrusion 71N of the first rod 71 is engaged with the groove 63D of the front case 63A and its rotation is restricted, the screw that engages with the screw hole 71S on the inner peripheral surface of the first rod 71. The shaft 61 having the portion 61S can be advanced and retracted in the axial direction.

  The operation of the leveling device configured as described above will be described below.

  First, for example, when initializing the optical axis of the lamp unit, as shown in FIG. 4A, the rotary knob 62 is manually rotated in the γ direction in the drawing. Since both the rear end portion 611L of the shaft 61 and the hole 62H of the shaft body portion 62A of the rotary knob 62 into which the rear end portion 611L is inserted are polygonal, the rotation of the rotary knob 62 is directly applied to the shaft 61. Be transmitted.

  Here, the shaft 61 is inserted into the first rod 71, and the first rod 71 is in a state in which the rotation is restricted because the protrusion 71N provided on the first rod 71 is engaged with the groove 63D of the front case 63A. ing.

  Since the screw portion 61S formed on the shaft 61 is screwed into the screw hole 71S formed on the first rod 71, the shaft 61 advances and retreats in its axial direction (α direction in the figure) by its rotation. In this case, since the shaft 61 is inserted into a relatively long hole 62H formed in the shaft body portion 62A of the rotary knob 62, the shaft 61 can move relative to the rear case 63A of the shaft 61 even if it is moved in the axial direction. The shaft support is made with the rotary knob 62 interposed.

  When the attitude of the vehicle changes, a change in the attitude of the vehicle is detected by a control device of an auto leveling system (not shown), and the motor 82 shown in FIG. The gear 72 is rotated via the two gears 82 and the worm gear 81.

  The gear 72 rotates in the δ direction in the figure as shown in FIG. In this case, since the screw portion 72S of the gear 72 is screwed into the screw hole 63E of the front case 63A, the gear 72 advances and retreats in the axial direction (ε direction in the figure) while rotating with respect to the front case 63A.

  Since the gear 72 is sandwiched between the projection 71A of the first rod 71 and the second rod 85 engaged with the first rod 71, the shaft of the first rod 71 moves forward and backward in the ε direction in the drawing. Move forward and backward in the direction (direction ε ′ in the figure). In this case, the projection 71N of the first rod 71 is engaged with the groove 63D of the front case 63A, so that the rotation of the gear 72 is not transmitted to the first rod 71.

  Since the screw 61S of the shaft 61 is screwed into the screw hole 71S of the first rod 71, the advance / retreat of the first rod 71 in the ε ′ direction in the drawing is transmitted to the shaft 61, and the shaft 61 has its axis Move forward and backward in the direction (α direction in the figure).

  In the vehicular lamp 1 configured as described above, the leveling device 50B included in the vehicular lamp 1 can be configured so that the shaft 61 can be advanced and retracted in the axial direction both manually and electrically. Can be connected by a so-called ball joint.

Therefore, for example, the initial setting of the optical axis of the lamp unit can be manually performed, and the optical axis of the lamp unit can be adjusted electrically according to the detection of the attitude of the vehicle, and the arrangement of the leveling device 50B with respect to the lamp unit. It is possible to have a certain degree of tolerance at the location, and the assembly accuracy of the vehicular lamp 1 can be improved.
(Embodiment 2)
The ball portion 61A formed in front of the shaft 61 shown in the first embodiment is formed as a complete sphere portion.

  However, as shown in FIG. 9, the ball portion 61 </ b> A may be configured to have a polygonal shape (for example, an octagonal shape in FIG. 9) that crosses the shaft 61 in the axial direction. 9A is a view of the ball portion 61A as viewed from the front, and FIG. 9B is a view of the ball portion 61B as viewed from the side. In FIG. 2B, the first rod 71 screwed to the shaft 61 is also drawn.

When the ball portion 61A is formed as a perfect sphere portion as shown in the first embodiment, the friction with the ball socket portion 53 is reduced, and the shaft 61 of the leveling device 50B is easily rotated by, for example, vibration of the vehicle. It will not be avoided. In this case, when the shaft 61 is rotated, the shaft 61 advances and retreats even though it is small, causing a disadvantage that the lamp unit is tilted. For this reason, as described above, the ball section 61A has a polygonal cross section, thereby increasing the friction with the ball socket section 53 and eliminating the above disadvantages.
(Embodiment 3)
In each of the above-described embodiments, the ball portion 61A is formed on the shaft 61 of the leveling device 50B, and the ball socket portion 53 is formed on the lamp unit. However, the present invention is not limited to this, and it goes without saying that the ball socket portion 53 may be formed on the shaft 61 of the leveling device 50B, and the ball portion 61A may be formed on the lamp unit.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 10 ... Housing, 11 ... Groove part, 12 ... Sealing material, 20 ... Front lens, 30 ... Light chamber, 40 ... Bracket, 41 ... Light source, 50 ... Optical axis Adjustment mechanism, 50A: Rotating spindle, 50B: Leveling device, 50B '... Aiming mechanism, 51 ... Spherical spindle, 51A ... Spherical part, 52 ... Spherical bearing part, 52A: Spherical concave part, 53... Ball socket portion, 53 A... Spherical recess, 61... Shaft (for leveling device), 61 A... Ball portion, 61 S... Screw portion, 62. ... O-ring, 62H ... hole, 63 ... housing, 63A ... front case, 63B ... rear case, 63D ... groove, 63F ... recess, 63E ... screw hole, 71 ... first rod, 71A …… Protrusions, 71B …… Recesses, 71S: Screw hole, 72: Gear, 72S: Screw part, 72T: Gear forming part, 81: Worm gear, 82 ... Motor, 83 ... First gear, 84 ... Second gear, 85 ... ... second rod, 85A ... projection.

Claims (3)

A lamp unit is disposed in a lamp chamber constituted by a housing and a front lens, the lamp unit is mounted via the housing and an optical axis adjustment mechanism, and the optical axis adjustment mechanism includes at least a leveling device. In the lighting equipment,
The leveling device is connected to the lamp unit through a ball joint with a shaft that is supported by the housing.
The shaft is supported by the housing with a cylindrical rod inserted through the shaft and a cylindrical gear inserted through the rod.
The rod is threadedly engaged with the shaft, and is configured such that rotation about an axis with respect to the housing is restricted and axial movement is performed, so that the shaft is manually rotated by the shaft. Advancing and retreating in the axial direction of
The gear is screwed with the housing, and is configured to follow the movement of the rod in the axial direction as the gear moves in the axial direction with respect to the housing. A vehicular lamp characterized in that the rod and the shaft are advanced and retracted in the axial direction by rotation.   The ball joint is formed by a ball part formed on one of the shaft and the lamp unit, and a ball socket part formed on the other of the shaft and the lamp unit and enclosing the ball part. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided. The vehicular lamp according to claim 2, wherein the ball portion has a polygonal cross section in the axial direction.

Images