JP5995656B2 - Vehicle headlamp - Google Patents

Description

  The present invention relates to a vehicle headlamp. More specifically, the present invention relates to a technical field of a vehicle headlamp provided with a light amount adjustment mechanism having a pivot fulcrum portion.

JP 2002-222603 A

  Some vehicle headlamps include, for example, a lamp unit having a light source or the like disposed inside a lamp outer casing constituted by a cover and a lamp housing.

  An optical axis adjustment mechanism such as an aiming mechanism that performs initial adjustment of the direction of the optical axis and a leveling mechanism that adjusts the direction of the optical axis that changes according to the weight of a vehicle-mounted object is disposed in the vehicle headlamp. There are some (see, for example, FIG. 3 of Patent Document 1).

  In the vehicle headlamp described in Patent Document 1, an aiming mechanism and a leveling mechanism are provided. For example, the aiming mechanism has a pivot shaft (fulcrum shaft) serving as a pivot, and two rotatable aiming screws for performing an optical axis adjustment mechanism in the vertical and horizontal directions. Both screws are connected to a bracket that holds the lamp unit.

  One end of the pivot shaft in the axial direction is connected to the lamp housing, and the other end in the axial direction is connected to the bracket in a rotatable state.

  The aiming screw is supported in a state in which one end portion in the axial direction is rotatable on the lamp housing and is not movable in the axial direction, and the other end portion in the axial direction is screwed to a nut attached to the bracket.

  When one aiming screw is rotated, the nut is sent in the front-rear direction, and the bracket and the lamp unit are rotated together with the line connecting the pivot shaft and the other aiming screw as a fulcrum to adjust the optical axis in the vertical direction. (Aiming adjustment) is performed. When the other aiming screw is rotated, the nut is sent in the front-rear direction, and the bracket and the lamp unit are rotated together with a line connecting the pivot shaft and the one aiming screw as a fulcrum. Axis adjustment (aiming adjustment) is performed.

  As described above, the lamp unit and the bracket are integrally rotated in the vertical direction or the horizontal direction with the pivot shaft as a fulcrum. Accordingly, the pivot shaft functions as a pivot point for the bracket and the lamp unit during aiming adjustment.

  However, in the vehicle headlamp described in Patent Document 1, the bracket that holds the lamp unit, the pivot shaft that functions as a rotation fulcrum, and the aiming screw that functions as an operation unit in aiming adjustment are all different. It consists of parts.

  Therefore, there is a problem that the number of parts is large and the work of assembling each part to other parts is many, resulting in a high manufacturing cost and a decrease in workability.

  Accordingly, an object of the vehicle headlamp according to the present invention is to overcome the above-described problems and to reduce manufacturing costs and improve workability by reducing the number of parts.

In order to solve the above-described problem, a vehicle headlamp has a lamp unit disposed inside a lamp outer casing formed by a lamp housing having an opening on at least one side and a cover covering the opening of the lamp housing. A vehicle headlamp comprising: a bracket that holds the lamp unit; and an optical axis adjustment mechanism that connects the bracket and the lamp housing and adjusts the direction of the optical axis of the lamp unit. And a base surface portion that faces substantially in the front-rear direction and a pivot fulcrum portion that is pivotally connected to the connection support portion and serves as a pivot fulcrum when adjusting the optical axis. It is formed, on the base surface portion, wherein at least a portion of the connecting support part in a state where the pivot fulcrum portion is coupled is inserted into the connection support portion Entry apertures are formed, on the bracket, in which the pivot fulcrum portion and said base surface a plurality of connecting legs which are positioned spaced circumferentially connecting is provided.

  Therefore, in the vehicle headlamp, the pivot fulcrum portion of the bracket is connected to the connection support portion, and the bracket is rotatably supported by the lamp housing.

The vehicle headlamp according to the present invention is a vehicle headlamp in which a lamp unit is arranged inside a lamp outer casing formed by a lamp housing having an opening in at least one side and a cover covering the opening of the lamp housing. And a bracket for holding the lamp unit, an optical axis adjusting mechanism for connecting the bracket and the lamp housing and adjusting the direction of the optical axis of the lamp unit, and a connection support portion is provided on the lamp housing. , in the bracket, and a base surface portion substantially faces the front-rear direction, a pivot fulcrum portion which is a pivot point when rotatably connected to the optical axis adjustment in the connection support portions are formed integrally, to the base surface portion An insertion hole into which at least a part of the connection support portion is inserted in a state where the pivot fulcrum portion is connected to the connection support portion; The socket, characterized in that the pivot fulcrum portion and said base surface a plurality of connecting legs which are positioned spaced circumferentially connecting is provided.

Accordingly, the number of parts is reduced, and the work process in the assembly work of the optical axis adjusting mechanism is reduced, so that the manufacturing cost of the vehicle headlamp can be reduced and the workability can be improved by reducing the number of parts. Further, in a state where the pivot fulcrum portion is connected to the connection support portion, the connection support portion does not interfere with the bracket, and a stable connection state of the pivot fulcrum portion to the connection support portion can be ensured. Further, the insertion hole can be easily formed in the base surface portion, and accordingly, the manufacturing cost of the vehicle headlamp can be reduced.

2 to 5 show an embodiment of the present invention, which is a schematic side view showing a part of a vehicle headlamp in cross section. It is a front view of a bracket. It is an expansion perspective view which shows a part of bracket. FIG. 4 is an enlarged perspective view showing a part of the bracket in a state seen from a direction different from FIG. 3. It is an expanded sectional view which shows the example of the pivot fulcrum part protruded ahead from the base surface part in a cross section.

  EMBODIMENT OF THE INVENTION Below, the form for implementing the vehicle headlamp of this invention is demonstrated with reference to an accompanying drawing.

  The vehicle headlamps 1 are respectively attached to the left and right end portions of the front end portion of the vehicle body.

  The vehicle headlamp 1 includes a lamp housing 2 having a recessed portion opened forward and a cover 3 that closes the opening of the lamp housing 2 (see FIG. 1). The lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and the inner space of the lamp outer casing 4 is formed as a lamp chamber 5.

  At a position near the upper end of the lamp housing 2, a connection support portion 6 protruding forward from the inner surface of the rear portion 2 a is provided. The connection support 6 is formed with a connection recess 6a that opens forward, and the circumferential surface of the connection recess 6a is formed in a spherical shape.

  At the position near the lower end of the lamp housing 2, shaft support holes 7 and 7 are formed in the rear end portion 2b so as to be separated from each other in the right and left direction.

  A lamp unit 8 is disposed in the lamp chamber 5. The lamp unit 8 includes a lens holder 9, a projection lens 10 held by the lens holder 9, a reflector 11 that reflects light, and a light source unit 12 that is disposed below the reflector 11.

  The lens holder 9 includes a substantially annular lens mounting portion 9a penetrating in the front-rear direction, side portions 9b, 9b,... 9b, 9b,... And a holding portion 9c provided between them.

  The projection lens 10 is formed in a substantially hemispherical shape and is attached to the lens attachment portion 9 a of the lens holder 9.

  The inner surface of the reflector 11 is formed as a reflecting surface 11a. The reflector 11 is attached to the upper surface of the light source unit 12.

  The light source unit 12 is attached to the holding portion 9c of the lens holder 9, and includes a circuit board 12a and a light source 12b mounted on the upper surface of the circuit board 12a. As the light source 12b, for example, a light emitting diode (LED) is used. ing. The light source unit 12 is provided with a heat sink 12c located below the circuit board 12a.

  In the lamp unit 8, for example, the lens holder 9 is attached to the bracket 13 by screws or the like and held.

  The bracket 13 includes a base surface portion 14 facing substantially in the front-rear direction, connecting leg portions 15, 15,... And rear end portions of the connecting leg portions 15, 15,. The base surface portion 14, the connecting leg portions 15, 15,..., And the pivot fulcrum portion 16 are integrally formed (see FIGS. 2 to 4).

  Nut mounting holes 14a and 14a are formed in the base surface portion 14 below and to the sides of the pivot fulcrum portion 16, respectively. A unit insertion hole 14b is formed in a portion other than the outer peripheral portion of the base surface portion 14, and a part of the lamp unit 8 is inserted into the unit insertion hole 14b in a state where the lamp unit 8 is held by the bracket 13. The base surface portion 14 is formed with an insertion hole 14c at a portion where the pivot fulcrum portion 16 is located.

  Projections 14d, 14d,... Projecting from the opening edge of the insertion hole 14c toward the center of the insertion hole 14c are provided at equal intervals in the circumferential direction. By providing the protrusions 14d, 14d,..., The insertion hole 14c is formed in a cross shape when viewed from the front (see FIGS. 2 and 4).

  The connecting legs 15, 15,... Are gently inclined so as to be displaced toward each other toward the rear (see FIG. 3).

  The pivot fulcrum portion 16 is composed of a central portion 16a extending in the front-rear direction and semicircular projecting portions 16b, 16b,... Projecting vertically and horizontally from the central portion 16a, respectively, and adjacent in the circumferential direction. The connecting leg portions 15, 15,... Are continuous in a state of straddling the two protruding portions 16 b, 16 b.

  The bracket 13 and its pivot fulcrum portion 16 can be formed by injection molding using a molding die having a core mold and a cavity mold that are separated from each other in the front-rear direction.

  The pivot fulcrum portion 16 is inserted into the connection concave portion 6a of the connection support portion 6 in a press-fit manner from the front, and is connected to the lamp housing 2 so as to be rotatable in any direction. When the pivot fulcrum portion 16 is inserted into the connection recess 6a, for example, the connection support portion 6 is elastically deformed so as to be displaced outward, and when the pivot fulcrum portion 16 is inserted into the connection recess 6a, the connection is performed. The support portion 6 is elastically restored, and the pivot fulcrum portion 16 is connected to the connection support portion 6. In a state where the pivot fulcrum portion 16 is connected to the connection support portion 6, the front end portion of the connection support portion 6 is inserted into an insertion hole 14 c formed in the base surface portion 14 of the bracket 13 and positioned.

  As described above, the pivot fulcrum portion 16 of the bracket 13 is connected to the connection support portion 6, whereby the lamp unit 8 is connected to the lamp housing 2 via the bracket 13.

  The vehicle headlamp 1 is provided with an optical axis adjustment mechanism 17 that adjusts the direction of the optical axis of the lamp unit 8. For example, an aiming mechanism is provided as the optical axis adjustment mechanism 17, and the optical axis adjustment mechanism 17 includes nut members 18 and 18 and aiming screws 19 and 19. The optical axis adjustment mechanism 17 also includes a pivot fulcrum portion 16 provided on the bracket 13.

  The nut members 18 and 18 are attached to nut attachment holes 14a and 14a formed in the base surface portion 14 of the bracket 13, respectively. The nut member 18 is formed with a screw groove 18a on the inner surface.

  Aiming screws 19 and 19 are connected to the nut members 18 and 18, respectively. The aiming screw 19 has a shaft portion 20 extending in the front-rear direction and an operation portion 21 continuous to the rear end of the shaft portion 20. A portion near the front end of the shaft portion 20 is provided as a screwing portion 20a.

  The rear end portion of the shaft portion 20 of the aiming screw 19 is inserted into the shaft support hole 7 of the lamp housing 2 and is rotatably supported by the rear end portion 2b of the lamp housing 2. Therefore, the operation part 21 is located on the outer surface side of the rear end part 2b.

  The aiming screw 19 is connected to the bracket 13 via the nut member 18, with the screwed portion 20 a of the shaft portion 20 screwed into the screw groove 18 a of the nut member 18.

  In the optical axis adjustment mechanism 17, when the operation unit 21 of one aiming screw 19 is rotated, the nut member 18 is sent according to the rotation direction of the aiming screw 19 and moved in the front-rear direction. When the nut member 18 is moved in the front-rear direction, the bracket 13 and the lamp unit 8 are integrated with the movement of the nut member 18 and rotated with respect to the lamp housing 2 with the pivot fulcrum portion 16 as a fulcrum. The left and right aiming adjustment, which is the initial adjustment of, is performed.

  In the optical axis adjusting mechanism 17, when the operation unit 21 of the other aiming screw 19 is rotated, the nut member 18 is sent according to the rotation direction of the aiming screw 19 and moved in the front-rear direction. When the nut member 18 is moved in the front-rear direction, the bracket 13 and the lamp unit 8 are integrated with the movement of the nut member 18 and rotated with respect to the lamp housing 2 with the pivot fulcrum portion 16 as a fulcrum. The vertical aiming adjustment, which is the initial adjustment of, is performed.

  As described above, in the vehicle headlamp 1, the base surface portion 14 and the pivot fulcrum portion 16 are provided on the bracket 13 that holds the lamp unit 8, and the base surface portion 14 and the pivot fulcrum portion 16 are integrally formed. Has been.

  Therefore, the number of parts is reduced and the work process in the assembling work of the optical axis adjusting mechanism 17 is reduced, whereby the production cost of the vehicle headlamp 1 can be reduced and the workability can be improved by reducing the number of parts. .

  Further, an insertion hole 14 c is formed in the base surface portion 14 of the bracket 13 so that the connection support portion 6 is inserted in a state where the pivot fulcrum portion 16 is connected to the connection support portion 6 of the lamp housing 2.

  Therefore, in a state where the pivot fulcrum part 16 is connected to the connection support part 6, the connection support part 6 does not interfere with the bracket 13, and a stable connection state of the pivot fulcrum part 16 to the connection support part 6 can be ensured. it can.

  In addition, since the pivot fulcrum portion 16 and the base surface portion 14 are connected to the bracket 13 and are provided with a plurality of connecting leg portions 15, 15,... Spaced apart in the circumferential direction, the bracket 13 is inserted into the base surface portion 14. The hole 14c can be easily formed, and accordingly, the manufacturing cost of the vehicle headlamp 1 can be reduced.

  In the above, the bracket 13 in which the pivot fulcrum portion 16 protrudes rearward from the base surface portion 14 is shown as an example, but conversely, the bracket 13 in which the pivot fulcrum portion 16 protrudes forward from the base surface portion 14 is formed. It is also possible to do. In this case, for example, as shown in FIG. 5, the lamp housing 2 is provided with an L-shaped connection support portion 6 when viewed from the side, and the connection support portion 6 is formed with a connection recess 6 a opened rearward. The pivot fulcrum part 16 is connected to the lamp housing 2 by inserting the pivot fulcrum part 16 into the connecting recess 6a from the rear side in a press-fit manner.

  Further, the pivot fulcrum portion 16 may not be projected forward and backward from the base surface portion 14 but may be positioned inside the insertion hole 14c. In this case, the connection support portion 6 is formed long in the front and rear directions, and the insertion hole 14c is formed. It can be configured to be connected to the pivot fulcrum portion 16 located inside.

  Further, the example in which the pivot fulcrum portion 16 functions as the pivot fulcrum of the aiming mechanism has been described above. However, the vehicle headlamp 1 is provided with a leveling mechanism, and the pivot fulcrum portion 16 is the pivot fulcrum of the leveling mechanism. It may be configured to function as.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle headlamp, 2 ... Lamp housing, 3 ... Cover, 4 ... Lamp outer casing, 6 ... Connection support part, 8 ... Lamp unit, 12b ... Light source, 13 ... Bracket, 14 ... Base surface part, 14c ... Insertion Hole 15, connecting leg 16, pivot fulcrum 17, optical axis adjustment mechanism

Claims (1)

A vehicle headlamp in which a lamp unit is arranged inside a lamp outer casing formed by a lamp housing having an opening in at least one and a cover that covers the opening of the lamp housing,
A bracket for holding the lamp unit;
An optical axis adjustment mechanism for connecting the bracket and the lamp housing and adjusting the direction of the optical axis of the lamp unit;
A connection support portion is provided in the lamp housing,
The bracket is integrally formed with a base surface portion that faces substantially in the front-rear direction and a pivot fulcrum portion that is rotatably connected to the connection support portion and serves as a rotation fulcrum when adjusting the optical axis ,
The base surface portion is formed with an insertion hole into which at least a part of the connection support portion is inserted in a state where the pivot support portion is connected to the connection support portion.
A vehicle headlamp characterized in that the bracket is provided with a plurality of connecting leg portions that connect the pivot fulcrum portion and the base surface portion and are spaced apart in the circumferential direction .

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