JP2016207430A - Aiming mechanism of headlamp for vehicle and aiming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aiming mechanism for a headlamp which can individually adjust optical axes of two lamp units.SOLUTION: In an aiming mechanism of a headlamp 1 for a vehicle in which a low-beam lamp unit 3 and a high-beam lamp unit 4 are arranged in parallel with each other in a lamp chamber which is defined by a housing 2 and an outer lens covering an opening part of the housing, a bracket 5 which is movable with respect to the housing 2 is arranged in the lamp chamber, the high-beam lamp unit 4 is fixed to the bracket 5, the low-beam lamp unit 3 is supported to the bracket 5 so as to be vertically tiltable, and an adjusting bolt 18 screwed to the low-beam lamp unit 3 is turned while penetrating the bracket 5, thus making an optical axis of the low-beam lamp unit 3 vertically adjustable.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an aiming mechanism and an aiming method for a vehicle headlamp in which two lamp units are arranged in parallel in a lamp chamber.

  The headlamps arranged on the left and right sides of the front part of the vehicle are provided with an aiming mechanism, and the optical axis is adjusted by this aiming mechanism. In this aiming mechanism, the lamp unit is supported by a pivot so as to be tiltable with respect to the housing, the tip of an adjustment bolt inserted into the housing is screwed into the lamp unit, and the adjustment bolt is turned to center the lamp unit around the pivot. By tilting up and down or left and right, the optical axis of the lamp unit is adjusted up and down or left and right (see, for example, Patent Document 1).

JP 2004-31224 A

  By the way, there is a vehicle headlamp in which a lamp unit for a high beam and a lamp unit for a low beam are arranged side by side in the lamp chamber. In this type of headlamp, the height of the high beam and the height of the cut-off line of the low beam are included. Need to be tweaked.

  However, in the conventional headlamp, since the optical axis adjustment of the high beam lamp unit and the low beam lamp unit cannot be performed individually, the high beam height and the low beam cut-off line height are individually finely adjusted. However, if the molding accuracy and assembly accuracy of the bracket on which the lamp unit is arranged are poor, there is a problem that the headlamp is defective.

  The present invention has been made in view of the above problems, and an object thereof is to provide an aiming mechanism and an aiming method for a vehicle headlamp that can individually adjust the optical axes of two lamp units. It is in.

  In order to achieve the above object, an invention according to claim 1 is an aiming mechanism for a headlamp for a vehicle, in which two lamp units are arranged in parallel in a lamp chamber defined by a housing and an outer lens covering an opening of the housing. A bracket that is movable with respect to the housing is provided in the lamp chamber, one of the lamp units is fixed to the bracket, and the other is supported to be tiltable up and down with respect to the bracket, and is inserted into the bracket. Then, the optical axis of the other lamp unit can be adjusted up and down by turning an adjusting bolt screwed into the other lamp unit.

  According to a second aspect of the present invention, in the first aspect of the present invention, the bracket that holds the two lamp units is supported so as to be tiltable up and down and / or right and left with respect to the housing, and is inserted into the housing. The optical axis of the two lamp units can be adjusted simultaneously in the vertical direction and / or the horizontal direction by turning an adjusting bolt screwed into the bracket.

  The invention according to claim 3 is an aiming method for a vehicle headlamp, in which two lamp units are arranged in parallel in a lamp chamber defined by a housing and an outer lens covering the opening thereof. One of the lamp units is fixed and the other is supported by the bracket so as to be tiltable up and down, and an adjustment bolt inserted into the bracket is screwed into the other lamp unit to assemble a lamp assembly, and the lamp assembly After adjusting the optical axis of the other lamp unit in the vertical direction by turning the adjustment bolt in a three-dimensional shape, the lamp assembly is supported and assembled to the housing so as to be tiltable up and down and / or left and right, and inserted into the housing. The adjusting bolt is screwed into the lamp assembly, and the adjusting bolt is turned to rotate the lamp. And adjusting the optical axes of the two said lamp unit by tilting the stereoscopic vertically and / or horizontally relative to the housing vertically and / or lateral direction at the same time.

  According to the present invention, for example, in a vehicle headlamp in which a high beam lamp unit and a low beam lamp unit are arranged side by side, the optical axis of the high beam lamp unit is adjusted in the vertical direction at the time of assembly (the high beam has a predetermined The high beam lamp unit is fixed to the bracket in a state adjusted to a height, the low beam lamp unit is supported on the bracket so as to be tiltable up and down, and an adjustment bolt is turned to attach the low beam lamp unit to the bracket (high beam lamp). The optical axis can be adjusted vertically by tilting up and down with respect to the unit. For this reason, each optical axis of the high beam lamp unit and the low beam lamp unit is finely adjusted individually before the high beam lamp unit and the low beam lamp unit (lamp assembly) supported by the bracket are assembled to the housing. be able to. For this reason, the height of the high beam and the height of the low beam cut-off line can be finely adjusted individually during assembly.

  After the high beam lamp unit and the low beam lamp unit (lamp assembly) supported by the bracket are assembled to the housing, the adjustment bolt inserted into the housing is turned to tilt the lamp assembly up and down with respect to the housing. By doing so, the optical axes of the high beam lamp unit and the low beam lamp unit can be adjusted simultaneously in the vertical direction.

1 is a perspective view of a lamp assembly of a vehicle headlamp according to the present invention. It is an assembly drawing of the low beam lamp unit of the vehicle headlamp according to the present invention. It is an assembly drawing of the high beam lamp unit of the vehicle headlamp according to the present invention. (A)-(c) is the projection figure of the beam on the screen of the headlamp for vehicles which concerns on this invention, (a) at the time of the lamp unit for high beam lighting, (b) at the time of the lamp unit for low beam lighting, (c) is a figure which shows the state at the time of the lamp unit for low beam lighting after an optical axis adjustment, respectively. 1 is a front view of a vehicle headlamp according to the present invention. It is the sectional view on the AA line of FIG. FIG. 6 is a sectional view taken along line B-B in FIG. 5.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a perspective view of a lamp assembly of a vehicle headlamp according to the present invention, FIG. 2 is an assembly diagram of a low beam lamp unit of the vehicle headlamp, and FIG. 3 is a high beam lamp unit of the vehicle headlamp. FIGS. 4A to 4C are projection views of the beam on the screen of the vehicle headlamp according to the present invention, FIG. 5 is a front view of the vehicle headlamp according to the present invention, and FIG. FIG. 7 is a cross-sectional view taken along line AA of FIG. 5 and FIG. 7 is a cross-sectional view taken along line BB of FIG.

  A vehicle headlamp 1 shown in FIG. 5 is disposed on the left side of the front portion of the vehicle, and has a low beam in a lamp chamber defined by a housing 2 and a transparent outer lens (not shown) that covers the front opening. The lamp unit 3 for passing (passing) and the lamp unit 4 for high beam (running beam) are arranged side by side. The basic structure of the headlamp arranged on the right side of the front part of the vehicle is the left side. Since this is the same as the headlamp 1, illustration and description thereof are omitted.

  As shown in FIG. 1, the low beam lamp unit 3 and the high beam lamp unit 4 are assembled as a lamp assembly 6 by being assembled to a bracket 5 (see FIG. 2). The headlamp 1 as a product is configured by being assembled to the housing 2 as shown in FIG.

  Here, as shown in FIGS. 1 to 3, the low beam lamp unit 3 is composed of two left and right projector-type lamps 3A, and the high beam lamp unit 4 is composed of two right and left reflective lamps 4A. ing. The left and right reflective lamps 4A constituting the high beam lamp unit 4 include an LED (light emitting diode) (not shown) that is a light source, and a reflector that reflects light emitted upward from each LED toward the front of the vehicle. 4a and a heat sink 4b that dissipates heat generated by the LED.

  As shown in FIG. 2, screw holes 7 are formed at two locations on the lower left and right of the left portion of the bracket 5 where the low beam lamp unit 3 is assembled, and screw holes 8 are also formed at one upper portion. Is formed. In addition, screw holes 9 are formed at three locations on the upper right and lower ends of the bracket 5 to which the high beam lamp unit 4 is fixed, and positioning pins 10 protrude forwardly at two locations on the upper and lower sides.

  In addition, as shown in FIG. 2, circular holes 11 (only one is shown in FIG. 2) are provided at two locations on the left and right sides of the housing 3a of the low beam lamp unit 3 (two locations corresponding to the screw holes 7 of the bracket 5). A rectangular hole 12 is formed at one upper portion (a portion corresponding to the screw hole 8 of the bracket 5).

  On the other hand, as shown in FIG. 3, circular screw insertion holes 13 are formed at three positions above and below the left end of the heat sink 4 b of the high beam lamp unit 4 (three positions corresponding to the screw holes 9 of the bracket 5). In addition, circular positioning holes 14 are formed at two locations on the upper and lower sides (two locations corresponding to the positioning pins 10 of the bracket 5).

  Thus, in the manufacturing process of the headlamp 1, the lamp assembly 6 shown in FIG. 1 is constructed by assembling the low beam lamp unit 3 and the high beam lamp unit 4 to the bracket 5 in the manner described below. The In this case, the low beam lamp unit 3 is assembled so as to be able to tilt up and down (the optical axis can be adjusted in the vertical direction) with respect to the bracket 5, and the high beam lamp unit 4 is rigidly fixed to the bracket 5 so as not to tilt. .

  That is, as shown in FIG. 2, the pivot shafts 15 are respectively screwed from the front into the screw holes 7 formed on the left and right sides of the lower portion of the bracket 5, so that these pivot shafts 15 are fixed to the bracket 5. Also, bearings 16 are assembled and fixed in the circular holes 11 formed on the left and right sides of the lower part of the housing 3a of the lamp unit 3 for the low beam, and the rectangular block 12 formed in one upper part of the housing 3a has a rectangular block. A nut 17 is assembled and fixed.

  When the low beam lamp unit 3 is pushed into the bracket 5 from the front from the above state, the left and right pivot shafts 15 attached to the bracket 5 are fixed to the left and right bearings 16 fixed to the housing 3a of the low beam lamp unit 3. Since the spherical ball portion 15a is fitted, the low beam lamp unit 3 is tiltably supported by the bracket 5. Then, an adjustment bolt inserted into a screw hole 9 formed at one upper portion of the bracket 5 is screwed into a nut 17 fixed at one upper portion of the housing 3 a of the low beam lamp unit 3. The pivot shaft 15, the bearing 16, the nut 16, and the adjusting bolt 18 constitute an aiming mechanism for adjusting the vertical optical axis of the low beam lamp unit 3 during assembly.

  Accordingly, when the adjustment bolt 18 is turned in the assembly stage, the lower portion of the low beam lamp unit 3 tilts up and down around the pivot shaft 15 with respect to the bracket 5. The optical axis can be adjusted.

  On the other hand, as shown in FIG. 3, the low beam lamp unit 3 is assembled so as to be tiltable up and down (the optical axis can be adjusted in the vertical direction), and the high beam lamp unit 4 is fixed to the bracket 5 in a rigid manner.

  That is, the high beam lamp unit 4 is accurately attached to the bracket 5 by fitting the positioning pins 14 protruding from the bracket 5 into the two upper and lower positioning holes 14 formed in the heat sink 4 b of the high beam lamp unit 4. Is positioned. In this state, when screws 19 inserted into the screw insertion holes 13 formed at the three upper and lower positions of the heat sink 4c of the high beam lamp unit 4 are screwed into the screw holes 9 formed at the three upper and lower positions of the bracket 5, the high beam is obtained. The lamp unit 4 is fixed to the bracket 5 and the lamp assembly 6 shown in FIG. 1 is assembled.

  By the way, when the high beam emitted from the high beam lamp unit 4 is projected on the front screen, a high beam distribution as shown in FIG. 4A is projected. The high beam lamp unit 4 has an optical axis in the vertical direction. The bracket 5 is fixed in an adjusted state (a state in which the high beam is adjusted to a predetermined height). Then, the optical axis adjustment in the vertical direction of the low beam lamp unit 3 is performed by the aiming mechanism with the high beam lamp unit 4 adjusted in this way as a reference. In this case, when the cut-off line on the screen of the low beam emitted from the low beam lamp unit 3 is lower than a predetermined position as shown in FIG. 4B, for example, the adjustment bolt 18 shown in FIG. The lamp unit 3 is tilted upward with respect to the bracket 5 about the pivot shaft 15, and the low beam cut-off line is moved to a predetermined upper position as shown in FIG. 4C.

  Thus, in the assembly stage of the lamp assembly 6 as described above, when the vertical beam axis adjustment of the low beam lamp unit 3 is performed by the aiming mechanism, the lamp assembly 6 is tiltably assembled to the housing 2. Thus, the headlamp 1 shown in FIG. 5 is completed as a product. In this headlamp 1, the optical axis adjustment in the vertical direction of the entire lamp assembly 6 can be performed by a known aiming mechanism.

  That is, the lamp assembly 6 is supported by the housing 2 so that it can be tilted to the housing 2 by the pivot shaft 20 shown in FIG. 7 (only one is shown in FIG. 7). An adjusting nut 21 shown in FIG. 7 is fixed to one lower portion indicated by c in FIG. As shown in FIG. 7, a remotely operated motor 22 is assembled at the lower back of the housing 2, and an adjustment bolt 23 extending from the motor 22 extends through the housing 2 into the lamp chamber. The front end of the lamp assembly 6 is screwed into the adjustment nut 21 on the lamp assembly 6 side.

  Accordingly, when the motor 22 is driven to rotate the adjusting bolt 23 in any direction, the adjusting nut 21 screwed into the adjusting bolt 23 moves back and forth with respect to the housing 2, so that the lamp assembly 6 is moved to the housing. 2 is tilted in the vertical direction about the pivot shaft 20 and the vertical optical axis adjustment of the low beam lamp unit 3 and the high beam lamp unit 4 is performed simultaneously.

  As described above, in the headlamp 1 according to the present invention, the high beam lamp unit 4 and the low beam lamp unit 4 are arranged in parallel. In the adjusted state (a state in which the high beam is adjusted to a predetermined height), it is fixed to the bracket 5, the low beam lamp unit 3 is supported so as to be vertically engageable with the bracket 5, and the adjustment bolt 18 is turned to rotate the low beam lamp. The unit 3 can be tilted up and down with respect to the bracket 5 (high beam lamp unit 4) to adjust its optical axis in the vertical direction. Therefore, in the state before the low beam lamp unit 3 and the high beam lamp unit 4 (lamp assembly 6) supported by the bracket 5 are assembled to the housing 2, each light of the low beam lamp unit 3 and the high beam lamp unit 4 is provided. The axes can be fine-tuned individually. For this reason, the height of the high beam and the height of the low beam cut-off line can be finely adjusted individually during assembly.

  After the low beam lamp unit 3 and the high beam lamp unit 4 (lamp assembly 6) supported by the bracket 5 are assembled to the housing 2, the motor 22 is driven and the adjustment bolt 23 is rotated to turn the lamp assembly 6. Is tilted up and down with respect to the housing 2, the optical axes of the low beam lamp unit 3 and the high beam lamp unit 4 can be adjusted simultaneously in the vertical direction.

  In the above embodiment, the high beam lamp unit 4 is fixed to the bracket 5, and the vertical beam axis adjustment of the low beam lamp unit 3 is performed on the basis of the high beam lamp unit 4. However, conversely, the low beam lamp unit 3 may be fixed to the bracket 5, and the vertical optical axis adjustment of the high beam lamp unit 4 may be performed with reference to the low beam lamp unit 3.

  In the above embodiment, the aiming performed from the outside of the housing 2 is only the vertical optical axis adjustment so as to satisfy the North American standard. However, in order to satisfy the European and Japanese standards, the vertical direction is used. In addition, the optical axis may be adjusted in the left / right direction, or the optical axis may be adjusted only in the left / right direction.

  Further, the present invention has been described with respect to a form in which the present invention is applied to a headlamp 1 in which a low beam lamp unit 3 and a high beam lamp unit 4 are arranged side by side. However, the present invention relates to a low beam lamp unit and a high beam lamp. Of course, the present invention can be similarly applied to a headlamp formed by arranging lamp units in a vertical or diagonal direction.

1 Vehicle headlamp 2 Housing 3 Low beam lamp unit (the other lamp unit)
4 High beam lamp unit (one lamp unit)
5 Bracket 6 Lamp assembly 7-9 Screw hole 10 Positioning pin 11 Circular hole 12 Rectangular hole 13 Screw insertion hole 14 Positioning hole 15 Pivot shaft 16 Bearing 17 Nut 18 Adjust bolt 19 Screw 21 Adjust nut 22 Motor 23 Adjust bolt

Claims (3)

A vehicle headlamp aiming mechanism comprising two lamp units arranged side by side in a lamp chamber defined by an outer lens covering a housing and its opening,
A bracket movable with respect to the housing is provided in the lamp chamber, one of the lamp units is fixed to the bracket, and the other is supported to be tiltable up and down with respect to the bracket. An aiming mechanism for a vehicle headlamp, characterized in that an optical axis of the other lamp unit can be adjusted up and down by turning an adjusting bolt screwed into the other lamp unit.   The brackets holding the two lamp units are supported so as to be tiltable up and down or / and left and right with respect to the housing, and two adjustment bolts that are inserted into the housing and screwed into the brackets are turned. The aiming mechanism of a vehicle headlamp according to claim 1, wherein the optical axis of the lamp unit can be adjusted simultaneously in the vertical direction and / or the horizontal direction. An aiming method for a vehicle headlamp comprising two lamp units arranged in parallel in a lamp chamber defined by a housing and an outer lens covering an opening of the housing,
The lamp assembly is assembled by fixing one of the two lamp units to the bracket and supporting the other to the bracket so as to be tiltable up and down, and screwing an adjustment bolt inserted into the bracket into the other lamp unit. , After adjusting the optical axis of the other lamp unit in the vertical direction by turning the adjustment bolt in the lamp assembly,
The lamp assembly is assembled to the housing so as to be tiltable up and down and / or left and right, an adjustment bolt inserted into the housing is screwed into the lamp assembly, and the adjustment bolt is turned to rotate the lamp assembly. An aiming method for a vehicle headlamp, wherein the optical axes of the two lamp units are adjusted simultaneously in the vertical direction and / or the horizontal direction by tilting up and down or / and right and left with respect to the housing.

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