JP2006302532A - Vehicular headlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a conventional vehicular headlight generated when assembling a projection lens and lens holder side, and a horizontal supporting axis and shade side with good accuracy. <P>SOLUTION: The vehicular headlight has a frame member 9 holding the projection lens 4, and a first shade 5 and a second shade 6 rotatably mounted on a rotation axis 10. Groove parts 21, 30 on which the rotation axis 10 is held are formed on the frame member 9. As a result, when assembling the frame member 9 and the rotation axis 1 mutually, the position of the frame member 9 and the rotation axis 10 can be aligned by making the groove parts 21, 30 of the frame member 9 hold the rotation axis 10. By the above, the frame member 9 and the rotation axis 10 can be mutually aligned with good accuracy, and relative accuracy of the projection lens 4 held on the frame member 9 and the first and second shades 5, 6 rotatably mounted on the rotation axis 10 is improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a headlamp, a fog lamp, etc., which is a projector type vehicle that can obtain a plurality of light distribution patterns, for example, a light distribution pattern for passing, a light distribution pattern for highways, and a light distribution pattern for traveling This is related to the headlamps.

  This type of vehicle headlamp has been conventionally used (see, for example, Patent Document 1). Hereinafter, the vehicle headlamp will be described. The vehicle headlamp includes a reflector, a discharge bulb attached to the reflector, a projection lens attached to the reflector via a lens holder, a horizontal support shaft, and a rotatable support to the horizontal support shaft. And a driving device for rotating the shade, and positioning means for determining the rotational position of the shade. Hereinafter, the operation of the vehicle headlamp will be described. A plurality of light distribution patterns can be obtained by rotating the shade around the horizontal support shaft by the driving device and determining the rotation position of the shade by the positioning means.

  However, in the conventional vehicle headlamp described above, no consideration is given to alignment when the projection lens and lens holder side and the horizontal support shaft and shade side are assembled to each other. For this reason, the conventional vehicle headlamp has a problem in assembling the projection lens and the lens holder side with the horizontal support shaft and the shade side with high accuracy.

Registered Utility Model No. 2577070

  The problem to be solved by the present invention is that the conventional vehicle headlamp has a problem in assembling the projection lens / lens holder side and the horizontal support shaft / shade side with high accuracy.

  The present invention (the invention according to claim 1) is a projector-type vehicle headlamp capable of obtaining a plurality of light distribution patterns, and is rotatably attached to a frame member that holds a projection lens and a rotation shaft. The frame member is provided with a groove portion that holds the rotating shaft.

  In addition, the present invention (the invention according to claim 2) is provided with a stopper member that determines the rotational position of the shade, and is characterized in that a groove portion that holds the rotational shaft is also provided in the stopper member.

  Furthermore, this invention (the invention according to claim 3) is provided with a reflector that reflects light from the light source, and a groove portion that holds the rotating shaft is also provided in the reflector.

  The vehicle headlamp according to the present invention (the invention according to claim 1) holds the rotating shaft in the groove portion of the frame member, so that the frame member and the rotating shaft can be rotated together when the frame member and the rotating shaft are assembled to each other. Alignment with the dynamic axis can be performed. For this reason, the vehicle headlamp according to the present invention (the invention according to claim 1) can assemble the frame member and the rotating shaft with high accuracy. Thus, in the vehicle headlamp according to the present invention (the invention according to claim 1), the correlation accuracy between the projection lens held by the frame member and the shade that is rotatably attached to the rotation shaft. Is improved.

  In the vehicle headlamp of the present invention (the invention according to claim 2), the stopper member is held when the stopper member and the rotating shaft are assembled to each other by holding the rotating shaft in the groove portion of the stopper member. And the rotation axis can be aligned. For this reason, the vehicle headlamp of the present invention (the invention according to claim 2) can assemble the stopper member and the rotating shaft with high accuracy. As a result, the vehicle headlamp according to the present invention (the invention according to claim 2) improves the correlation accuracy between the stopper member and the shade that is rotatably attached to the rotation shaft. In addition, the vehicle headlamp according to the present invention (the invention according to claim 2) is configured so that the rotation shaft is held in the groove portion of the stopper member and the groove portion of the frame member from the front-rear direction, and the front-rear position of the rotation shaft and The vertical position can be restricted. For this reason, the vehicle headlamp of the present invention (the invention according to claim 2) assembles the projection lens and the frame member side, the shade and the rotating shaft side, and the stopper member side with high accuracy. Can do.

  Furthermore, the vehicle headlamp according to the present invention (the invention according to claim 3) holds the rotating shaft in the groove portion of the reflector so that the reflector and the rotating shaft can be rotated when the reflector and the rotating shaft are assembled to each other. Alignment with the shaft can be performed. For this reason, the vehicle headlamp of the present invention (the invention according to claim 3) can assemble the reflector and the rotating shaft with high accuracy. As a result, the vehicle headlamp of the present invention (the invention according to claim 3) improves the correlation accuracy between the reflector and the shade that is rotatably attached to the rotating shaft. Moreover, the vehicle headlamp according to the present invention (the invention according to claim 3) includes a projection lens and a frame member side, a shade and a rotating shaft side, a stopper member side, a reflector and a light source side, Can be assembled with high accuracy. As a result, the light distribution accuracy of the vehicle headlamp according to the present invention (the invention according to claim 3) is improved.

  Hereinafter, one example of embodiments of a vehicle headlamp according to the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. In the drawings, the symbol “F” indicates the front side of the vehicle (the forward direction side of the vehicle). The symbol “B” indicates the rear side of the vehicle. Reference sign “U” indicates an upper side of the front side as viewed from the driver side. The symbol “D” indicates the lower side when the front side is viewed from the driver side. The symbol “L” indicates the left side when the front side is viewed from the driver side. The symbol “R” indicates the right side when the front side is viewed from the driver side. The symbol “VU-VD” indicates vertical lines on the top and bottom of the screen. The symbol “HL-HR” indicates the left and right horizontal lines and the left and right horizontal lines of the screen. Reference sign “ZZ” indicates the optical axis of the reflector or projection lens.

  Hereinafter, the configuration of the vehicle headlamp according to this embodiment will be described. 1 and 5, reference numeral 1 denotes a vehicle headlamp according to this embodiment. The vehicle headlamp 1 is, for example, a projector-type headlamp. As shown in FIG. 5, the vehicle headlamp 1 is switched between a discharge lamp 2 as a light source, a reflector 3, a projection lens (condensing lens) 4, a first shade 5 and a second shade 6. The apparatus 7, the frame member 9, the rotation shaft 10, and the stopper member 11 are provided.

  The discharge lamp 2 is a so-called high pressure metal vapor discharge lamp such as a metal halide lamp, a high intensity discharge lamp (HID), or the like. The discharge lamp 2 is detachably attached to the reflector 3 via a socket mechanism 8. The light emitting portion of the discharge lamp 2 is located at or near the first focal point F1 of the reflector 3. In addition to the discharge lamp 2, the light source may be a halogen bulb or an incandescent bulb.

  A reflective surface is formed on the inner concave surface of the reflector 3 by vapor deposition of aluminum or silver coating. The reflecting surface of the reflector 3 is a reflecting surface based on an ellipse, for example, a rotating ellipsoid or a free-form surface (NURBS surface) based on an ellipse (the vertical cross section in FIG. 5 is an ellipsoid, and , A horizontal cross section (not shown) is a parabolic surface or a reflective surface having a deformed parabolic surface). For this purpose, the reflecting surface of the reflector 3 has a first focal point F1 and a second focal point (focal line on the horizontal section) F2. The reflector 3 is fixedly held by the frame member 9 such as a holder. The free curved surface (NURBS curved surface) of the reflecting surface of the reflector 3 is a NURBS free curved surface (Non-Uniform Rational B-B) described in “Mathematical Elemennts for Computer Graphics” (Devid F. Rogers, J Alan Adams). Spline Surface).

  The projection lens 4 is an aspherical convex lens. The front side of the projection lens 4 forms a convex aspheric surface, while the rear side of the projection lens 4 forms a flat aspheric surface. The projection lens 4 is fixedly held on the frame member 9. Although not shown, the projection lens 4 has a focal plane (meridional image plane) on the object space side in front of the second focal point F2 of the reflecting surface of the reflector 3.

  The first shade 5 and the second shade 6 use a low beam (from which a predetermined light distribution pattern LP shown in FIG. 12C is obtained as reflected light directed from the reflecting surface of the reflector 3 toward the projection lens 4 (see FIG. 12C). (Passing beam), a mid beam (highway beam) for obtaining a predetermined highway light distribution pattern MP shown in FIG. 13C, and a predetermined traveling light distribution pattern HP shown in FIG. 14C. Is switched to a high beam (running beam).

  On the other hand, the switching device 7 moves the first shade 5 and the second shade 6 into a low beam posture (a posture for passing, as shown in FIGS. 12A and 12B) from which the low beam is obtained. A mid-beam posture (the posture for an expressway, the posture shown in FIGS. 13A and 13B) from which the mid-beam is obtained, and a high-beam posture (a running posture) from which the high beam is obtained, 14 (A) and 14 (B)). The switching device 7 is fixedly held on the frame member 9.

  As shown in FIGS. 6 and 8, the first shade 5 includes a front shade part 50 </ b> F and a rear shade part 50 </ b> B, a first movable part 51, and two first support parts 52. .

  The front shade portion 50F and the rear shade portion 50B are made of a substantially rectangular thin plate member that is long in the lateral direction (left-right direction, horizontal direction). A lower part of the front shade part 50F and a lower part of the rear shade part 50B are connected by a horizontal plate. As a result, a gap is formed between the front shade portion 50F and the rear shade portion 50B. An upper horizontal cutoff line CL1L, an oblique cutoff line CL2L, and a lower horizontal cutoff line CL3L for the passing light distribution pattern LP are formed on the upper edge of the front shade part 50F and the upper edge of the rear shade part 50B. A lower horizontal edge 541, an oblique edge 542, and an upper horizontal edge 543 are provided. A notch 50 is provided on the left half of the lower portion of the front shade portion 50F.

  The first movable part 51 is composed of a rectangular thin plate member. One end (rear end) of the first movable portion 51 is fixed to the lower right side of the front shade portion 50F, and the first movable portion 51 protrudes forward from the front shade portion 50F. The plate surfaces of the front shade portion 50F and the rear shade portion 50B are substantially vertical, while the plate surface of the first movable portion 51 is substantially horizontal.

  The two first support portions 52 are integrally provided at substantially the center of both the left and right sides of the upper surface of the first movable portion 51. The two first support portions 52 are provided with circular through holes.

  Similarly, as shown in FIGS. 6 and 8, the second shade 6 includes a shade part 60, a second movable part 61, and two second support parts 62.

  The shade portion 60 is formed of a substantially rectangular thin plate member that is long in the lateral direction (left-right direction, horizontal direction). The shade portion 60 is disposed in a gap between the front shade portion 50F and the rear shade portion 50B of the first shade 5. A lower horizontal edge 641 and an oblique edge 642 for forming an upper horizontal cut-off line CL1M, an oblique cut-off line CL2M, and a lower horizontal cut-off line CL3M on the expressway light distribution pattern MP are formed on the upper edge of the shade part 60. An upper horizontal edge 643 is provided.

  The second movable portion 61 is composed of a rectangular thin plate member. One end (rear end) of the second movable portion 61 is fixed to the lower left side of the shade portion 60 through the notch 50 of the first shade 5, and the second movable portion 61 is located on the front side from the shade portion 60. Protruding. The plate surface of the shade part 60 is substantially vertical, while the plate surface of the second movable part 61 is substantially horizontal.

  The two second support parts 62 are integrally provided at substantially the center of both the left and right sides of the upper surface of the second movable part 61. The two second support portions 62 are provided with circular through holes.

  The first shade 5 and the second shade 6 are attached to the frame member 9 via the rotating shaft 10 and the stopper member 11 so that their postures can be switched. That is, the first shade 5 and the second shade 6 are rotatably attached to the turning shaft 10. The rotating shaft 10 is held in the groove 24 of the stopper member 11 and is fixed to the stopper member 11. On the other hand, the stopper member 11 is attached to the frame member 9.

  As shown in FIGS. 8 to 11, the stopper member 11 includes two fixing portions 12 at both left and right ends, two restricting portions 13 and two stopper portions 14 in the middle of the left and right, and a center pressing portion 15. It consists of and. Both ends of the rotating shaft 10 are fixed to the two fixing portions 12, respectively, and the rotating shaft 10 is disposed in the left-right direction (horizontal direction). The first shade 5 and the second shade 6 are disposed between the two restricting portions 13. The left and right ends of the front shade portion 50F and the rear shade portion 50B of the first shade 5 and the shade portion 60 of the second shade 6 are opposed to the lower surfaces of the two stopper portions 14. The two stopper portions 14 determine the rotational positions of the first shade 5 and the second shade 6. The first support portion 52 of the first shade 5 and the second support portion 62 of the second shade 6 are rotatably held on the rotating shaft 10. As a result, the first shade 5 and the second shade 6 are attached to the frame member 9 via the rotating shaft 10 and the stopper member 11 so that the posture can be switched. Further, the edges 641, 642, 643 of the upper edge of the shade portion 60 of the second shade 6 are positioned at or near the second focal point F2 of the reflecting surface of the reflector 3.

  A spring 16 is provided between the first shade 5 and the second shade 6 and the rotating shaft 10. As shown in FIGS. 6 to 8, the spring 16 includes a central fixing portion 17, two coil portions 18 in the middle of the left and right sides, and two urging portions 19 at both left and right ends. The rotating shaft 10 is inserted through the two coil portions 18. The fixing portion 17 is fixed to the pressing portion 15 of the stopper member 11. The two urging portions 19 include a portion of the upper surface of the first movable portion 51 of the first shade 5 that is in front of the first support portion 52 and the second movable portion of the second shade 6. Each of the upper surfaces of 61 is in elastic contact with the front side of the second support part 62. The two coil portions 18 are in elastic contact with the first support portion 52 of the first shade 5 and the second support portion 62 of the second shade 6 that face each other.

  The first shade 5 and the second shade 6 are caused by the spring force P1 acting outward in the left-right direction of the two coil portions 18 and the right-left restricting action of the two restricting portions 13. Movement in the left-right direction is restricted. Further, the spring force P2 acting around the pivot shaft 10 of the two urging portions 19 and the stopper action around the pivot shaft 10 of the two stopper portions 14 cause the first beam in the low beam posture. The rotation of the first shade 5 and the second shade 6 around the rotation shaft 10 is restricted. As a result, the first shade 5 and the second shade 6 are supported without play in the left-right direction and around the rotation shaft 10. Further, when the first shade 5 and the second shade 6 are in the low beam posture, as shown in FIG. 9, the first movable portion 51 of the first shade 5 and the second movable portion of the second shade 6. 61 is located at substantially the same level (same height).

  As shown in FIGS. 5, 6, and 9 to 11, the switching device 7 has a unit structure and includes a housing 20. The housing 20 is fixed to the stopper member 11 so that the upper surface thereof faces the lower surface of the first movable portion 51 of the first shade 5 and the lower surface of the second movable portion 61 of the second shade 6. Yes. As a result, the switching device 7 is attached to the frame member 9 via the stopper member 11.

  A first advance / retreat rod 22 and a second advance / retreat rod 23 are provided on the upper surface of the housing 20 so as to advance and retract. One end (upper end) of the first advancing / retracting rod 22 faces a portion of the lower surface of the first movable portion 51 of the first shade 5 that is more forward than the first support portion 52. On the other hand, one end (upper end) of the second advancing / retracting rod 23 is opposed to a portion of the upper surface of the second movable portion 61 of the second shade 6 that is in front of the second support portion 62. The spring force P2 of the two urging portions 19 acts as a pressing force on one end of the first advance / retreat rod 22 and one end of the second advance / retreat rod 23 via the first movable portion 51 and the second movable portion 62. is doing. As a result, one end of the first advancing / retracting rod 22 and the lower surface of the first movable portion 51 of the first shade 5 are in elastic contact with a location on the front side of the first support portion 52. On the other hand, one end of the second advancing / retreating rod 23 and a portion of the upper surface of the second movable portion 61 of the second shade 6 on the front side of the second support portion 62 are in elastic contact.

  A drive source (not shown) is provided in the housing 20. The drive source is composed of, for example, two solenoids or one motor. When the drive source is two solenoids, the first forward / backward rod 22 and the second forward / backward rod 23 are forward / backward rods (plungers) of the respective solenoids. When the drive source is a single motor, the first advance / retreat rod 22 and the second advance / retreat rod 23 are connected to the one motor via a driving force transmission mechanism. Examples of the driving force transmission mechanism include a gear group, a gear group and an idle mechanism, and a gear group and a cam mechanism. The drive source controls the advance / retreat of the first advance / retreat rod 22 and the advance / retreat of the second advance / retreat rod 23.

  As shown in FIGS. 1 to 4, the first holding portion 26 having a vertical chamfered portion in the vertical cross section and a circular arc portion on the left and right at the left and right end portions of the rotating shaft 10. Is provided. In addition, a second holding portion 27 having a circular longitudinal cross-sectional shape is provided at the central portion of the rotating shaft 10. On the other hand, the frame member 9, the stopper member 11, and the reflector 3 are respectively provided with groove portions 21, 24, and 25 that hold the first holding portion 26 and the second holding portion 27 of the rotating shaft 10. ing.

  That is, a triangular guide groove 28 is provided at the substantially central portion of the left and right side portions of the frame member 9, and the groove portion 21 is provided at the apex of the triangle of the guide groove 28. The groove portion 21 of the frame member 9 has a longitudinal sectional shape in which the first holding portion 26 of the rotating shaft 10 is held. That is, the longitudinal cross-sectional shape of the groove part 21 of the said frame member 9 has a horizontal chamfering part up and down, and has a circular arc part in the back.

  Further, the groove portion 24 is provided at substantially the center of the left and right side portions of the stopper member 11. The groove portion 24 of the stopper member 11 has a longitudinal sectional shape in which the second holding portion 27 of the rotating shaft 10 is held. That is, the longitudinal cross-sectional shape of the groove portion 24 of the stopper member 11 is a long groove that is slightly longer in the front-rear direction and has a semicircular shape at the back. The groove portion 24 of the stopper member 11 is located inside the groove portion 21 of the frame member 9.

  Further, the groove 25 is provided at substantially the center on both the left and right sides of the front opening of the reflector 3. The groove portion 25 of the reflector 3 has a vertical cross-sectional shape in which the second holding portion 27 of the rotating shaft 10 is held. That is, the longitudinal cross-sectional shape of the groove part 25 of the reflector 3 is semicircular. The groove part 25 of the reflector 3 is located outside the groove part 24 of the stopper member 11 and inside the groove part 21 of the frame member 9.

  3A shows the first holding part 26 and the second holding part of the rotating shaft 10, the groove part 21 of the frame member 9, the groove part 24 of the stopper member 11, and the groove part 25 of the reflector 3. FIG. It is explanatory drawing. FIG. 3B is an explanatory view showing a modification of the first holding portion 29 of the rotating shaft 10 and the groove portion 30 of the frame member 9. FIG. 3C is an explanatory view showing a modification of the groove 31 of the stopper member 11.

  The first holding part 29 of the rotating shaft 10 has a chamfered part with three sides and a curved part with three apexes whose longitudinal cross-sectional shape is an equilateral triangle. On the other hand, the groove portion 30 of the frame member 9 has a vertical cross-sectional shape in which the first holding portion 29 of the rotating shaft 10 is held. That is, the longitudinal cross-sectional shape of the groove portion 30 of the frame member 9 has a substantially V-shaped chamfered portion on two sides and an arc portion sandwiched between the chamfered portions on the two sides. Further, the groove portion 31 of the stopper member 11 has a longitudinal sectional shape in which the second holding portion 27 of the rotating shaft 10 is held. That is, the longitudinal cross-sectional shape of the groove portion 31 of the stopper member 11 is a long groove that is slightly longer in the front-rear direction, and the back is substantially V-shaped.

  The vehicle headlamp 1 according to this embodiment is configured as described above. Hereinafter, a method of assembling the rotating shaft 10, the frame member 9, the stopper member 11, and the reflector 3 will be described.

  First, as shown in FIG. 3A, the first holding portion 26 of the rotating shaft 10 is held in the groove portion 21 of the frame member 9, and the frame member 9 and the rotating shaft 10 are assembled to each other. Then, the upper and lower surfaces of the first holding portion 26 are fitted to the upper and lower surfaces of the groove portion 21, and one arc portion of the first holding portion 26 contacts the arc portion at the back of the groove portion 21. Thereby, the center O1 of the rotating shaft 10 and the center O2 of the groove portion 21 of the frame member 9 are matched, and the alignment of the frame member 9 and the rotating shaft 10 is performed. In particular, the vertical alignment between the frame member 9 and the rotary shaft 10 is ensured by the fitting of the upper and lower surfaces of the groove 21 and the upper and lower surfaces of the first holding portion 26. Further, when the first holding portion 26 of the rotating shaft 10 is held in the groove portion 21 of the frame member 9, the first holding portion 26 can be easily and reliably held in the groove portion 21 by the guide action of the guide groove 28. Can do.

  Next, as shown in FIG. 3A, the second holding portion 27 of the rotating shaft 10 is held in the groove portion 24 of the stopper member 11, and the stopper member 11 and the rotating shaft 10 are assembled to each other. Then, the second holding part 27 is fitted into the groove part 24. Thereby, the center O1 of the rotating shaft 10 and the center O3 of the groove portion 24 of the stopper member 11 coincide with each other, and the stopper member 11 and the rotating shaft 10 are aligned. In particular, the vertical alignment between the stopper member 11 and the rotating shaft 10 is reliably performed by fitting the groove portion 24 having a semicircular back and the second holding portion 27 having a circular longitudinal section. Further, by holding the second holding portion 27 and the first holding portion 26 of the rotation shaft 10 in the groove portion 24 of the stopper member 11 and the groove portion 21 of the frame member 9 from the front-rear direction, the front-rear position of the rotation shaft 10 is obtained. And the vertical position can be regulated.

  Further, as shown in FIG. 3A, the second holding portion 27 of the rotating shaft 10 is held in the groove portion 25 of the reflector 3, and the reflector 3 and the rotating shaft 10 are assembled to each other. Then, the second holding part 27 is fitted into the groove part 25. Thereby, the center O1 of the rotating shaft 10 and the center O4 of the groove portion 25 of the reflector 3 are matched, and the reflector 3 and the rotating shaft 10 are aligned. In particular, the vertical alignment between the reflector 3 and the rotating shaft 10 is ensured by the fitting of the semicircular groove 25 and the second holding part 27 having a circular longitudinal section. In addition, as the rotating shaft 10, there is a rotating shaft 10 shown in FIG. 3B (that is, a first holding portion 29 having a chamfered portion with three sides having a regular triangular longitudinal section and a curved portion with three apexes. Even if the rotating shafts 10) provided at the left and right end portions are used, the central portion of the rotating shaft 10 is provided with the second holding portion 27 having a circular longitudinal sectional shape. Similar to the rotating shaft 10 shown in FIG. 3A, the reflector 3 and the rotating shaft 10 are reliably aligned.

  Furthermore, as shown in FIG. 3B, the frame member 9 and the rotating shaft 10 are assembled to each other by holding the first holding portion 29 of the rotating shaft 10 in the groove 30 of the frame member 9. Then, the V-shaped chamfered portion of the first holding portion 29 is fitted into the V-shaped chamfered portion of the groove portion 30, and one arc portion of the first holding portion 29 is held between the groove portions 30. Abuts against the part. Thereby, the center O1 of the rotating shaft 10 and the center O2 of the groove portion 30 of the frame member 9 coincide with each other, and the frame member 9 and the rotating shaft 10 are aligned. In particular, by fitting the V-shaped chamfered portion of the first holding portion 29 and the V-shaped chamfered portion of the groove portion 30, the centers O1 and O2 of the rotating shaft 10 and the frame member 9 can be easily and reliably aligned.

  Further, as shown in FIG. 3C, the stopper member 11 and the rotating shaft 10 are assembled to each other by holding the second holding portion 27 of the rotating shaft 10 in the groove portion 31 of the stopper member 11. Then, the second holding part 27 is fitted into the groove part 31. Thereby, the center O1 of the rotating shaft 10 and the center O3 of the groove portion 31 of the stopper member 11 coincide with each other, and the stopper member 11 and the rotating shaft 10 are aligned. In particular, the center O1, O3 of the rotating shaft 10 and the stopper member 11 can be easily and reliably aligned by the two-point contact fitting between the V-shaped groove portion 31 at the back and the second holding portion 27 having a circular longitudinal section. Is called. As the rotation shaft 10, the rotation shaft 10 shown in FIG. 3A (that is, the first holding portion 26 having a vertical chamfered portion with a horizontal chamfered portion and a circular arc portion on the left and right sides) Even if the rotating shafts 10) provided at the left and right end portions are used, the second holding portion 27 having a circular longitudinal section is provided at the center of the rotating shaft 10, so that FIG. Similarly to the rotation shaft 10 shown in FIG. 5B, the stopper member 11 and the rotation shaft 10 are reliably aligned.

  The vehicle headlamp 1 according to this embodiment is configured as described above, and the operation thereof will be described below.

  First, the discharge lamp 2 is turned on. Then, the light from the discharge lamp 2 is reflected by the reflecting surface of the reflector 3. The reflected light is collected at the second focal point F2 of the reflecting surface of the reflector 3, diffused through the second focal point F2, and further projected forward (radiated and irradiated) through the projection lens 4. . The projection light (radiation light, irradiation light) is distributed as a low beam from which a predetermined light distribution pattern LP shown in FIG. 12C is obtained or for a predetermined motor way shown in FIG. 13C. The light beam is projected forward as a mid beam from which the light pattern MP is obtained or as a high beam from which a predetermined traveling light distribution pattern HP shown in FIG. 14C is obtained.

  Here, a case where a light distribution pattern LP for passing is obtained will be described. By the operation of the switching device 7, the first advance / retreat rod 22 and the second advance / retreat rod 23 are respectively positioned at the positions shown in FIG. At this time, one end (upper end) of the first advance / retreat rod 22 and one end (upper end) of the second advance / retreat rod 23 are positioned at substantially the same level. As a result, the first shade 5 and the second shade 6 are positioned at the positions shown in FIGS. 9 and 12A and 12B, and a low beam posture in which a light distribution pattern LP (low beam) for passing can be obtained. It is in. As a result, as shown in FIG. 12C, a passing light distribution pattern LP having cut-off lines CL1L, CL2L, and CL3L is obtained.

  Next, the case where the light distribution pattern MP for highways is obtained will be described. The first advancing / retracting rod 22 is moved forward by the operation of the switching device 7, and the first advancing / retreating rod 22 and the second advancing / retreating rod 23 are positioned at the positions shown in FIG. At this time, the 1st shade 5 and the 2nd shade 6 are located in the position shown in Drawing 10 and Drawing 13 (A) and (B), and light distribution pattern MP (mid beam) for highways is obtained. In mid-beam position. As a result, as shown in FIG. 13C, a highway light distribution pattern MP having cut-off lines CL1M, CL2M, and CL3M is obtained.

  Then, a case where a light distribution pattern HP for traveling is obtained will be described. By the operation of the switching device 7, the second advance / retreat rod 23 is moved forward, and the first advance / retreat rod 22 and the second advance / retreat rod 23 are positioned at the positions shown in FIG. 11. At this time, the first shade 5 and the second shade 6 are located at the positions shown in FIG. 11 and FIGS. 14A and 14B, and a high beam posture in which a traveling light distribution pattern HP (high beam) can be obtained. It is in. As a result, a traveling light distribution pattern HP is obtained as shown in FIG.

  The vehicle headlamp 1 according to this embodiment has the above-described configuration and action, and the effects thereof will be described below.

  The vehicle headlamp 1 according to this embodiment causes the groove portions 21 and 30 of the frame member 9 to hold the first holding portions 26 and 29 of the rotating shaft 10, thereby causing the frame member 9 and the rotating shaft 10 to move. When assembled with each other, the frame member 9 and the rotating shaft 10 can be aligned. For this reason, the vehicular headlamp 1 according to this embodiment can assemble the frame member 9 and the rotating shaft 10 with high accuracy. Thereby, the vehicle headlamp 1 according to this embodiment includes the projection lens 4 held by the frame member 9 and the first shade 5 and the second shade that are rotatably attached to the rotation shaft 10. 6 is improved.

  In addition, the vehicle headlamp 1 according to this embodiment causes the groove portions 24 and 31 of the stopper member 11 to hold the second holding portion 27 of the rotating shaft 10, thereby connecting the stopper member 11 and the rotating shaft 10. When assembled with each other, the stopper member 11 and the rotating shaft 10 can be aligned. For this reason, the vehicle headlamp 1 according to this embodiment can assemble the stopper member 11 and the rotating shaft 10 with high accuracy. Thereby, in the vehicle headlamp 1 according to this embodiment, the correlation accuracy between the first shade 5 and the second shade 6 that are rotatably attached to the stopper member 11 and the rotary shaft 10 is improved. . Moreover, in the vehicle headlamp 1 according to this embodiment, the first holding portions 26 and 29 of the rotating shaft 10 and the second holding portion are provided in the groove portions 24 and 31 of the stopper member 11 and the groove portions 21 and 30 of the frame member 9. By holding the portion 27 from the front-rear direction, the front-rear position and the vertical position of the rotation shaft 10 can be regulated. For this purpose, the vehicle headlamp 1 according to this embodiment includes a projection lens 4 and a frame member 9 side, a first shade 5 and a second shade 6 and a rotating shaft 10 side, a stopper member 11 side, Can be assembled with high accuracy.

  Further, in the vehicle headlamp 1 according to this embodiment, when the second holding portion 27 of the rotating shaft 10 is held in the groove portion 25 of the reflector 3, the reflector 3 and the rotating shaft 10 are assembled to each other. In addition, the reflector 3 and the rotating shaft 10 can be aligned. For this reason, the vehicle headlamp 1 according to this embodiment can assemble the reflector 3 and the rotating shaft 10 with high accuracy. Thereby, the vehicle headlamp 1 according to this embodiment improves the correlation accuracy between the first shade 5 and the second shade 6 that are rotatably attached to the reflector 3 and the rotary shaft 10. Moreover, the vehicle headlamp 1 according to this embodiment includes the projection lens 4 and the frame member 9 side, the first shade 5 and the second shade 6 and the rotating shaft 10 side, the stopper member 11 side, and the reflector 3. And the discharge lamp 2 side can be assembled with high accuracy. As a result, the vehicle headlamp 1 according to this embodiment has improved light distribution accuracy.

  Furthermore, the inner side surfaces (opposite surfaces) of the left and right side portions where the groove portions 21 and 30 of the frame member 9 are provided are connected to the first holding portions 26 and 29 at the left and right end portions of the rotating shaft 10 and the second portion at the center portion. By aligning with the step portion between the holding portion 27 and the frame member 9 and the rotation shaft 10, the horizontal positioning can be performed. In addition, by providing a left-right positioning means between the rotating shaft 10 and the stopper member 11 and / or the reflector 3, the left-right positioning of the rotating shaft 10 and the stopper member 11 and / or the reflector 3 can be performed. it can.

  In the above embodiment, the first shade 5 or the second shade 6 is rotated to pass the light distribution pattern LP for passing, the light distribution pattern MP for highways, and the light distribution pattern for traveling. A projector-type headlamp capable of obtaining HP will be described. However, in the present invention, the obtained light distribution pattern is not particularly limited. Further, the obtained light distribution pattern may be two or four or more. For example, rain light distribution pattern and fog light distribution pattern. Further, a fog lamp may be used in addition to the projector type headlamp.

  Moreover, in the said Example, the 1st shade 5 and the 2nd shade whose edge makes a straight line are used as a shade. However, in the present invention, a shade having a curved edge may be used, or one shade or three or more shades may be used.

  Furthermore, in the present invention, the means for rotating the shade is not particularly limited to that of this embodiment.

1 is an overall side view showing an embodiment of a vehicle headlamp according to the present invention. Similarly, it is a disassembled side view which shows a frame member, a stopper member, and a reflector. Similarly, it is a side view which shows the groove part of a frame member, the groove part of a stopper member, the groove part of a reflector, and a rotating shaft. Similarly, it is a perspective view which shows the groove part of a frame member, the groove part of a stopper member, the groove part of a reflector, and a rotating shaft. Similarly, it is the whole longitudinal cross-sectional view which shows the projector type headlamp of this Example. Similarly, it is a perspective view which shows a 1st shade, a 2nd shade, and a switching device. Similarly, it is explanatory drawing which shows the effect | action of a spring. Similarly, it is a top view which shows a 1st shade, a 2nd shade, and a switching device. Similarly, it is a front view showing a first shade and a second shade in a low beam posture and a switching device. Similarly, it is a front view showing a first shade and a second shade in a mid-beam posture and a switching device. Similarly, it is a front view which shows the 1st shade and 2nd shade of a high beam attitude | position, and a switching apparatus. Similarly, it is explanatory drawing which shows the light distribution pattern for passing with the 1st shade and 2nd shade of a low beam attitude | position. Similarly, it is explanatory drawing which shows the light distribution pattern for the 1st shade and 2nd shade of a mid-beam attitude | position, and a highway. Similarly, it is explanatory drawing which shows the 1st shade and 2nd shade of a high beam attitude | position, and the light distribution pattern for driving | running | working.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Discharge lamp 3 Reflector 4 Projection lens 5 1st shade 6 2nd shade 50F Front shade part 50B Rear shade part 60 Shade part 50 Notch 51 1st movable part 61 2nd movable part 52 1st support Part 62 Second support part 541, 641 Lower horizontal edge 542, 642 Diagonal edge 543, 643 Upper horizontal edge 7 Switching device 8 Socket mechanism 9 Frame member 10 Rotating shaft 11 Stopper member 12 Fixing part 13 Restriction part 14 Stopper part 15 Presser Part 16 Spring 17 Fixed part 18 Coil part 19 Biasing part 20 Housing 21 Groove part 22 First advance / retreat rod 23 Second advance / retreat rod 24 Groove part 25 Groove part 26 First holding part 27 Second holding part 28 Guide groove 29 First holding part 30 Groove 31 Groove F1 First focus F2 Second focus LP Light pattern MP Light distribution pattern for expressway HP Light distribution pattern for driving CL1L, CL1M Upper horizontal cut-off line CL2L, CL2M Oblique cut-off line CL3L, CL3M Lower horizontal cut-off line P1, P2 Spring force F Before B After U Up D Below L Left R Right VU-VD Vertical vertical line HL-HR Horizontal horizontal line ZZ Optical axis O1 Center of rotation axis O2 Center of groove part of frame member O3 Center of groove part of stopper member O2 Center of groove part of reflector

Claims (3)

In a projector type vehicle headlamp that can obtain a plurality of light distribution patterns,
A light source;
A reflector for reflecting light from the light source;
A projection lens that projects the reflected light from the reflector forward;
A frame member for holding the projection lens;
A pivot axis;
A shade that is pivotally attached to the pivot shaft, and switches the reflected light from the reflector toward the projection lens to a plurality of beams from which the plurality of light distribution patterns are obtained by rotating;
A switching device that rotates the shade to switch to a plurality of postures to obtain the plurality of beams;
A stopper member for determining the rotational position of the shade;
With
The frame member is provided with a groove for holding the rotation shaft.
A vehicle headlamp characterized by that. The stopper member is provided with a groove for holding the rotation shaft,
The groove portion of the stopper member and the groove portion of the frame member hold the rotating shaft from the front-rear direction to restrict the front-rear position and the vertical position of the rotation shaft.
The vehicle headlamp according to claim 1. The reflector is provided with a groove for holding the rotating shaft.
The vehicle headlamp according to claim 1 or 2, characterized in that

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