JP2008288086A - Vehicular headlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a shade by fixing two thin sheets with high portion accuracy in order to obtain a light distribution pattern with high accuracy. <P>SOLUTION: The shade 5 comprising a two-plate structure in which first and second shade portions 14 and 15 of board members that are different from each other are mutually to each other is included. The first shade portion 14 and a spring member 6 form an integral structure. Position regulation portions 23 and 24 fit with each other to regulate their positions between each other is placed on the first shade portion 14 and the second shade portion 15, respectively. As a result, the two first and second shade portions 14 and 15 can be fixed with high position accuracy by fitting the position regulation portions 23 and 24 with each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bi-function type vehicle headlamp, such as a projector-type headlamp, which can obtain a plurality of light distribution patterns, for example, a passing light distribution pattern and a traveling light distribution pattern. .

  This type of projector-type vehicle headlamp has been conventionally used (see, for example, Patent Document 1). Hereinafter, a conventional vehicle headlamp will be described. A conventional vehicle headlamp includes a light source, a reflector that reflects light from the light source, a projection lens that projects the reflected light from the reflector in front of the vehicle, and a plurality of reflected lights that are directed from the reflector toward the projection lens. A shade for switching to a plurality of beams from which the light distribution pattern is obtained, and a spring member and a drive unit for switching the posture (position) of the shade to a plurality of postures for obtaining a plurality of beams.

  Hereinafter, the operation of the conventional vehicle headlamp will be described. In a conventional vehicle headlamp, when a light source is turned on, light from the light source is reflected by the reflecting surface of the reflector toward the shade and the projection lens, and the reflected light is projected from the projection lens to the front of the vehicle. Here, due to the spring action of the spring member and the drive action of the drive unit, the attitude of the shade is switched to a plurality of attitudes, the reflected light from the reflector to the projection lens is switched to a plurality of beams, and a plurality of light distribution patterns are formed. can get.

  Here, in this type of vehicle headlamp, in order to use an inexpensive drive unit having a small driving force and an inexpensive spring member having a small spring force, the shade has a thin plate structure. Further, in this type of vehicle headlamp, it is necessary to manufacture a shade by fixing two thin plates with high positional accuracy in order to obtain a highly accurate light distribution pattern.

JP 2003-59311 A

  The problem to be solved by the present invention is that it is necessary to manufacture a shade by fixing two thin plates with high positional accuracy in order to obtain a highly accurate light distribution pattern.

  The present invention (the invention according to claim 1) includes a shade having two plate structures in which a first shade portion and a second shade portion of separate plate members are fixed to each other, and the first shade portion. The spring member and the spring member have an integral structure, and the first shade portion and the second shade portion are provided with position restricting portions that are fitted to each other to restrict the positions thereof. And

  In the present invention (the invention according to claim 2), the left and right end portions of the first shade portion and the left and right end portions of the second shade portion are fixed to each other. A gap is provided between the central portion of the shade portion, the portion from the central portion of the first shade portion to at least one of the left and right end portions, and the left and right end portions from the central portion of the second shade portion. Of the first shade part to the left and right end parts of the first shade part and of the second shade part to the left and right end parts of the second shade part. A position restricting portion is provided on at least one of the portions.

  Furthermore, this invention (the invention according to claim 3) is characterized in that the plate thickness of the second shade portion is larger than the plate thickness of the first shade portion.

  Furthermore, according to the present invention (the invention according to claim 4), the position restricting portion includes a convex bead provided in one of the first shade portion and the second shade portion, and a convex bead provided in the other. And a fitting part such as a concave bead or a slit to be fitted.

  In the vehicle headlamp of the present invention (the invention according to claim 1), the position restricting portion of the first shade portion and the position restricting portion of the second shade portion are fitted to each other. The position and the position of the second shade part are regulated mutually. For this reason, the vehicle headlamp according to the present invention (the invention according to claim 1) can manufacture a shade by fixing two plates with high positional accuracy. can get.

  In the vehicle headlamp according to the present invention (the invention according to claim 2), since a gap is provided between the central portion of the first shade portion and the central portion of the second shade portion, the plate thickness is large. As with a single shade, the light that forms the central portion of the cut-off line of the light distribution pattern is reliably shielded, so that glare can be reliably prevented. Moreover, the vehicle headlamp according to the present invention (the invention according to claim 2) is configured such that the central portion of the first shade portion and the second portion of the first shade portion are shielded by the light shielded by the central portion of the first shade portion and the central portion of the second shade portion. Light incident between the central portion of the shade portion can be effectively used as, for example, an overhead sign light distribution pattern. In addition, the vehicle headlamp according to the present invention (the invention according to claim 2) includes a position restricting portion and a second shade portion at a portion from the center portion of the first shade portion to at least one of the left and right end portions. The position restricting part of the part from the center part to at least one of the left and right ends is mutually fitted, and the part from the center part of the first shade part to at least one of the left and right ends Since the portion from the center portion of the second shade portion to at least one of the left and right end portions is in contact with each other, the rigidity and strength of the first shade portion and the second shade portion are improved, and the component accuracy is improved. Further improve.

  Furthermore, in the vehicle headlamp of the present invention (the invention according to claim 3), the plate thickness of the second shade portion is thicker than the plate thickness of the first shade portion integrated with the spring member. Even if the plate thickness of the first shade portion is reduced, the rigidity of the first shade portion and the second shade portion is fixed by restricting the position of the first shade portion and the second shade portion by the position restricting portion. The strength is improved and the accuracy of the parts is improved. On the other hand, the vehicle headlamp according to the present invention (the invention according to claim 3) can reduce the thickness of the first shade portion integrated with the spring member even if the thickness of the second shade portion is increased. Therefore, the plate thickness of the spring member can be reduced, and the spring performance of the spring member is improved correspondingly, and the spring force as designed is easily obtained.

  Furthermore, in the vehicle headlamp according to the present invention (the invention according to claim 4), the position restricting portion provided in either one of the first shade portion and the second shade portion is formed of a convex bead. The rigidity and strength of the shade part and the second shade part can be further improved. On the other hand, in the vehicle headlamp according to the present invention (the invention according to claim 4), the position restricting portion provided on the other of the first shade portion and the second shade portion is a concave bead in which the convex bead fits or Since it consists of fitting parts, such as a slit, manufacture is easy and can reduce manufacturing cost.

  Embodiments of a vehicle headlamp according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. In the drawing, the symbol “VU-VD” indicates the vertical axis on the top and bottom and the vertical line on the top and bottom of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen. In this specification and claims, “upper”, “lower”, “front”, “rear”, “left”, “right” are vehicle headlights according to the present invention. ) Is “up”, “down”, “front”, “back”, “left”, “right” of the vehicle.

  Hereinafter, the configuration of the vehicle headlamp according to this embodiment will be described. The vehicle headlamp according to this embodiment is used for left-hand traffic in Japan. A vehicular headlamp used for left-hand traffic in Europe has substantially the same configuration as the vehicular headlamp according to this embodiment. Further, the vehicle headlamp used for right-hand traffic in Europe and right-hand traffic in North America has a configuration that is substantially opposite to that of the vehicle headlamp according to this embodiment.

  In FIG. 1, reference numeral 1 denotes a vehicle headlamp according to this embodiment. The vehicular headlamp 1 is, for example, a projector-type headlamp that is provided on each of the left and right sides of a front portion of an automobile (vehicle). As shown in FIG. 1, the vehicle headlamp 1 includes a light source 2, a reflector 3, a projection lens (condensing lens, convex lens) 4, a shade 5, a spring member 6 as a switching means, and The driving unit 7, a frame member 8, a stopper 9, a lamp housing (not shown), and a lamp lens (not shown) (for example, a transparent outer lens) are provided.

  The light source 2, the reflector 3, the projection lens 4, the shade 5, the spring member 6, the drive unit 7, the frame member 8 and the stopper 9 constitute a lamp unit. The lamp unit is disposed, for example, via an optical axis adjusting mechanism (not shown) in a lamp chamber (not shown) defined by the lamp housing and the lamp lens.

  In this example, the light source 2 uses a discharge lamp (not shown). The discharge lamp 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 light source 2 is detachably attached to the reflector 3 via a socket mechanism 10. In addition to the discharge lamp, the light source 2 may be a semiconductor light source such as a halogen bulb, an incandescent bulb, or an LED. The light source 2 includes a light emitting unit 11.

  The reflector 3 reflects the lights L1 and L2 from the light source 2 toward the projection lens 4 side. The reflector 3 is fixedly held on the frame member 8. The reflector 3 has a hollow concave shape that is open on the front side (light irradiation direction side of the vehicle headlamp 1) and closed on the rear side. A circular through hole 12 into which the light source 2 is inserted is provided at the center of the closing portion on the rear side of the reflector 3.

  A reflective surface 13 is formed on the inner concave surface of the reflector 3 by vapor deposition of aluminum or silver coating. The reflecting surface 13 of the reflector 3 is an ellipse or 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. None, and a horizontal cross section (not shown) is a parabolic surface or a reflecting surface having a deformed parabolic surface). For this purpose, the reflecting surface 13 of the reflector 3 has a first focal point F1, a second focal point (focal line on a horizontal section) F2, and an optical axis ZZ. The free curved surface (NURBS curved surface) of the reflecting surface 13 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 first focal point F1 of the reflecting surface 13 of the reflector 3 is located at or near the light emitting unit 11 of the light source 2.

  The projection lens 4 projects the reflected lights L3 and L4 from the reflecting surface 13 of the reflector 3 in front of the vehicle. 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 (plane). The projection lens 4 is fixedly held on the frame member 8. The projection lens 4 has a lens focal point (a meridional image plane that is a focal plane on the object space side) F3 and an optical axis Z1-Z1. The focal point F3 of the projection lens 4 is located at or near the second focal point F2 of the reflecting surface 13. The optical axis Z1-Z1 of the projection lens 4 and the optical axis ZZ of the reflecting surface 13 are coincident or substantially coincident. The optical axis Z1-Z1 of the projection lens 4 and the optical axis ZZ of the reflecting surface 13 may be shifted left and right.

  The shade 5 converts the reflected lights L3 and L4 from the reflecting surface 13 of the reflector 3 toward the projection lens 4 into a plurality of light distribution patterns, for example, a passing light distribution pattern LP shown in FIG. A plurality of beams from which the traveling light distribution pattern HP shown is obtained, that is, a low beam and a high beam are switched. The shade 5 has a plate structure with a low manufacturing cost (in this example, a flat thin steel plate structure capable of reflecting light, such as stainless steel or SUS (spring steel plate)).

  As shown in FIGS. 1 to 6, the shade 5 is vertically long and positioned on the rear side (the light source 2 side), and is also vertically short and positioned on the front side (the projection lens 4 side). The second shade portion 15 and the horizontal attachment portion 16 are configured. The shade 5 includes the first shade portion 14 and the attachment portion 16, which are separate plate members, and the second shade portion 15. In the shade 5, the left and right end portions 140 of the first shade portion 14 and the left and right end portions 150 of the second shade portion 15 are separate plate members, respectively, and fixing means 22 (caulking, riveting, welding, bonding, etc.) ) Are fixed to each other. As a result, the shade 5 has a two-plate structure.

  The first shade portion 14 and the second shade portion 15 of the shade 5 are configured to switch the reflected lights L3 and L4 between the low beam and the high beam. As viewed from above, the first shade portion 14 and the second shade portion 15 have a central portion protruding toward the light source 2 along the focal point F3 of the projection lens 4, and both left and right end portions toward the projection lens 4 side. It has a protruding curved shape. The shade 5 has a two-plate structure composed of the first shade portion 14 and the second shade portion 15 so that the color (for example, blue) generated in the light distribution patterns LP and HP can be erased. it can.

  A first edge 17 is provided on the upper edge of the first shade portion 14. A second edge 18 is provided on the upper edge of the second shade portion 15. The first edge 17 is located at or near the focal point F3 of the projection lens 4. The second edge 18 is located closer to the projection lens 4 than the first edge 17. The first edge 17 and the second edge 18 are each composed of a left upper horizontal edge, a right lower horizontal edge, and a central oblique edge. The upper horizontal edge forms a lower horizontal cut-off line CL on the opposite lane side of the passing light distribution pattern LP shown in FIG. 7, and the lower horizontal edge is an upper horizontal cut on the traveling lane side of the passing light distribution pattern LP. An off-line CL is formed, and an oblique edge forms an oblique cut-off line CL of the passing light distribution pattern LP.

  When the first shade part 14 and the second shade part 15 of the shade 5 are switched to the first posture, the first shade part 14 and the second shade part 15 are reflected by the reflector 3. The passing light distribution pattern having the cut-off line CL by cutting off part of the reflected light L3 and L4 from the surface 13 toward the projection lens 4 and passing the remaining reflected light L3 and L4 to the projection lens 4 side. LP is formed. At this time, the first edge 17 of the first shade portion 14 and the second edge 18 of the second shade portion 15 form the cut-off line CL of the passing light distribution pattern LP.

  The spring member 6 and the drive unit 7 have a plurality of postures in which the low beam and the high beam can be obtained between the upper posture and the lower posture, that is, the low beam in the first posture. The posture is switched between the posture and the high beam posture of the second posture. The low beam posture is an upper posture (position) shown in FIG. 1, and the high beam posture is a lower posture (position) positioned below the low beam posture shown in FIG.

  In this example, the spring member 6 has a thin plate structure having elasticity such as stainless steel or SUS (spring steel plate), like the shade 5. The spring member 6 has a dome structure as shown in FIGS. The shade 5 and the spring member 6 form an integral structure. That is, the attachment portion 16 of the first shade portion 14 of the shade 5 and the substantially central portion of the upper horizontal portion of the spring member 6 are integrally coupled. Hereinafter, an integral structure of the shade 5 and the spring member 6 will be described with reference to FIG.

  The first shade portion 14 and the mounting portion 16 on the rear side of the shade 5 having the thin plate structure and the spring member 6 having the thin plate structure are integrally formed by pressing or the like (FIG. 6A). reference). On the other hand, the second shade 15 on the front side of the shade 5 having a thin plate structure is also formed separately by pressing or the like (see FIG. 6B). The left and right end portions 140 of the first shade portion 14 on the rear side integral with the spring member 6 and the left and right end portions 150 of the separate second shade portion 15 on the front side are fixed by the fixing means 22 ( (See solid line arrow in FIG. 6C). Thereby, the shade 5 and the spring member 6 constituted by the two first shade portions 14 and the second shade portion 15 have an integral structure.

  The spring member 6 is fixed to the frame member 8. In other words, both end portions of the lower horizontal fixing portion 19 of the spring member 6 are fixed to the frame member 8 by screws 20. When the spring member 6 integrally formed with the shade 5 is fixed to the frame member 8, the direction in which the spring force of the spring member 6 acts is the first posture (low beam posture) in which the posture of the shade 5 is upward. ) And the lower second posture (high beam posture).

  The drive unit 7 is composed of a solenoid. As shown in FIG. 1, the solenoid 7 is accommodated in the space of the spring member 6 and is fixed to the frame member 8 via the fixing portion 17 of the spring member 6. The tip of the advance / retreat rod 21 of the solenoid 7 is attached to the attachment portion 16 of the shade 5 and the spring member 6. As shown in FIG. 1, the direction in which the advance / retreat rod 21 of the solenoid 7 advances / retreats coincides or substantially coincides with the direction in which the spring force of the spring member 6 acts and the direction of switching the attitude of the shade 5. The acting direction of the spring force of the spring member 6, the switching direction of the attitude of the shade 5, and the advancing / retreating direction of the advancing / retreating rod 21 of the solenoid 7 are the vertical vertical VU-VD directions.

  The stopper 9 is fixed to the frame member 8. As shown in FIG. 1, when the solenoid 7 is not driven, the stopper 9 elastically contacts the mounting portion 16 of the shade 5 to restrict and brake the low beam posture of the shade 5.

  As shown in FIG. 4, the left and right end portions 140 of the first shade portion 14 and the left and right end portions 150 of the second shade portion 15 are fixed to each other by the fixing means 22. The central portion 141 of the first shade portion 14 has a curved shape, while the central portion 151 of the second shade portion 15 has a linear shape. As a result, a gap S is provided between the central portion 141 of the first shade portion 14 and the central portion 151 of the second shade portion 15.

  Left and right both-side portions 142 between the center portion 141 of the first shade portion 14 and the left and right end portions 140 and left and right portions of the portion between the center portion 151 and the left and right end portions 150 of the second shade portion 15. Both the portions 152 have a curved shape. For this reason, the right and left both-side portion 142 of the first shade portion 14 and the left and right both-side portion 152 of the second shade portion 15 abut against each other.

  Position restricting portions 23 and 24 are respectively provided in the longitudinal direction at the left and right both-side portions 142 of the first shade portion 14 and the left and right both-side portions 152 of the second shade portion 15. The position restricting portions 23 and 24 are fitted to each other to restrict the position of the first shade portion 14 and the position of the second shade portion 15 to each other.

  As shown in FIG. 5A, the position restricting portion 23 of the first shade portion 14 is formed of a convex bead (semicircular convex portion), while the position restricting portion 24 of the second shade portion 15. Consists of a slit into which the convex bead 23 is fitted. As shown in FIG. 5B, the position restricting portion 23 of the first shade portion 14 is made of a convex bead, while the position restricting portion 25 of the second shade portion 15 is made of the convex bead. It may consist of a concave bead (semi-circular recess) into which 23 is fitted. Further, as shown in FIG. 5C, the position restricting portion 26 of the first shade portion 14 includes a slit, while the position restricting portion 27 of the second shade portion 15 is formed on the slit 26. It may consist of a convex bead to be fitted. Further, although not shown, the position restricting portion of the first shade portion 14 is made of a concave bead, while the position restricting portion of the second shade portion 15 is made of a convex bead that fits into the concave bead. It may be a thing.

  As shown in FIG. 5, the plate thickness of the second shade portion 15 is thicker than the plate thickness of the first shade portion 14, the attachment portion 16, and the spring member 6. For example, the plate thickness of the first shade portion 14, the attachment portion 16, and the spring member 6 is about 0.2 mm, while the plate thickness of the second shade portion 15 is about 0.2 mm to about 0. .5 mm. Also, the first shade portion 14 is vertical and long, while the second shade portion 15 is vertical and short. For this reason, the width of the first shade portion is wider (larger) than the width of the second shade portion 15.

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

  First, the light source 2 is turned on. Then, light L1 and L2 are radiated | emitted from the light emission part 11 of this light source 2. FIG. The lights L1 and L2 are reflected by the reflecting surface 13 of the reflector 3 toward the shade 5 and the projection lens 4 side. That is, the light L1 is reflected by the lower reflective surface 13 of the reflector 3. Further, the light L <b> 2 is reflected by the upper reflecting surface 13 of the reflector 3.

  At this time, when the solenoid 7 is not driven, that is, in a non-energized state, the advancing / retreating rod 21 of the solenoid 7 moves forward and the shade 5 is biased upward by the spring force of the spring member 6, and The attachment portion 16 of the shade 5 is in elastic contact with the stopper 9. As a result, the shade 5 is regulated and braked and is in the low beam posture (first posture) shown in FIG.

  When the shade 5 is in the low beam posture shown in FIG. 1, some of the reflected light L3 and L4 from the reflecting surface 13 of the reflector 3 is shielded by the first shade portion 14 and the second shade portion 15 of the shade 5. The On the other hand, the remaining reflected lights L3 and L4 proceed to the projection lens 4 side, and are projected (radiated and irradiated) to the front of the automobile as the passing light distribution pattern LP shown in FIG. Further, the cut-off line CL is formed in the passing light distribution pattern LP shown in FIG. 7 by the first edge 17 of the first shade portion 14 of the shade 5 and the second edge 18 of the second shade portion 15.

  That is, a part of the reflected light L3 from the lower reflecting surface 13 is shielded by the first shade portion 14, and a first light distribution pattern (not shown) is formed by the remaining reflected light L3. At this time, since the first edge 17 of the first shade portion 14 is located at or near the focal point F3 of the projection lens 4, a clear cut-off line is formed in the first light distribution pattern by the first edge 17. ing. In particular, since the central portion 141 of the first edge 17 is located at or near the focal point F3 of the projection lens 4, the central portion of the cut-off line of the first light distribution pattern is further clear. The first light distribution pattern mainly forms the central portion of the passing light distribution pattern LP.

  On the other hand, a part of the reflected light L4 from the upper reflecting surface 13 is shielded by the first shade part 14 and the second shade part 15, and the second reflected light L4 forms the second light distribution pattern. At this time, since the second edge 18 of the second shade portion 15 is located closer to the projection lens 4 than the first edge 17, the second light distribution pattern of the second light distribution pattern is caused by the second edge 18. A cut-off line that is less clear than the cut-off line is formed. In particular, the left and right intermediate portion 142 of the first edge 17 of the first shade portion 14 and the left and right intermediate portion 152 of the second edge 18 of the second shade portion 15 are in contact with each other, and the width thereof is the first shade 14. The width of the central portion 141 of the first edge 17 and the central portion 151 of the second edge 18 of the second shade portion 15 is narrower. That is, the left and right intermediate portions 152 of the second edge 18 of the second shade portion 15 are extended from the extension line of the central portion 152 of the second edge 18 of the second shade 15 with respect to the first edge 17 of the first shade 14. It is located at a position that is shifted to the left and right inter-unit 142 side. In addition, the left and right portions 142 of the first edge 17 of the first shade 14 and the left and right portions 152 of the second edge 18 of the second shade 15 are shifted from the focal point F3 of the projection lens 4 toward the light source 2 side. Located in. For this reason, light rides on both left and right ends of the cut-off line of the second light distribution pattern, and the luminous intensity value of this portion increases. The second light distribution pattern mainly forms a peripheral portion of the passing light distribution pattern LP.

  Then, by combining the first light distribution pattern and the second light distribution pattern, a passing light distribution pattern LP shown in FIG. 7 is obtained. At this time, the central portion of the cutoff line CL of the passing light distribution pattern LP is clearer than the clear central portion of the cutoff line of the first light distribution pattern. In addition, the left and right ends of the cut-off line CL of the passing light distribution pattern LP are blurred by the left and right ends of the cut-off line in which the second light distribution pattern is blurred. Furthermore, the light at the left and right ends of the cut-off line of the second light distribution pattern rides on the left and right ends of the cut-off line CL of the passing light distribution pattern LP, and the light intensity value of this portion increases.

  When the solenoid 7 is energized, the solenoid 7 is driven and the advance / retreat rod 21 of the solenoid 7 moves backward against the spring force of the spring member 6. Accordingly, the shade 5 switches from the upper low beam posture (first posture) shown in FIG. 1 to the lower high beam posture (second posture).

  Then, the reflected light L3, L4 from the reflecting surface 13 of the reflector 3 that has been shielded by the first shade portion 14 and the second shade portion 15 of the shade 5 so far, together with the remaining reflected light L3, L4, is a projection lens. Then, the light is projected (radiated and irradiated) in front of the automobile as a traveling light distribution pattern HP shown in FIG.

  When the energization of the solenoid 7 is interrupted, the solenoid 7 is brought into a non-driven state, so that the elastically deformed spring member 6 is elastically returned to the spring force. As a result, the shade 5 is switched from the lower high beam posture (second posture) to the upper low beam posture (first posture) shown in FIG. Accordingly, the traveling light distribution pattern HP shown in FIG. 8 is switched to the passing light distribution pattern LP 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.

  In the vehicle headlamp 1 according to this embodiment, the position restricting portions 23, 26 of the first shade portion 14 and the position restricting portions 24, 25, 27 of the second shade portion 15 are fitted to each other, The position of the 1st shade part 14 and the position of the 2nd shade part 15 are mutually controlled. For this purpose, the vehicle headlamp 1 according to this embodiment is configured such that the left and right end portions 140 of the first shade portion 14 and the left and right end portions 150 of the second shade portion 15 are fixed by the fixing means 22. At the time of fixing, the mutual displacement between the first shade part 14 and the second shade part 15 made of the two plates, for example, when the fixing means 22 is caulked, the deviation of the rotational direction around the caulking, etc. Can be reliably prevented. As a result, the vehicle headlamp 1 according to this embodiment can manufacture the shade by fixing the first shade portion 14 and the second shade portion 15 of the two plates with high positional accuracy. A light distribution pattern with high accuracy can be obtained.

  Moreover, since the vehicle headlamp 1 according to this embodiment has the gap S between the central portion 141 of the first shade portion 14 and the central portion 151 of the second shade portion 15, the thickness 1 is large. Similarly to the sheet shade, the light that forms the central portion of the cut-off line CL of the passing light distribution pattern LP shown in FIG. 7 is reliably shielded, so that glare can be reliably prevented.

  In addition, the vehicle headlamp 1 according to this embodiment includes the first shade portion 14 and the middle portion 141 of the first shade portion 14 and the first shade portion 14 with the light shielded by the middle portion 141 of the first shade portion 14 and the middle portion 151 of the second shade portion 15. The light L6 incident between the two shade portions 15 and the central portion 151 can be effectively used as, for example, an overhead sign light distribution pattern.

  In addition, the vehicle headlamp 1 according to this embodiment includes the position restricting portions 23 and 26 of the left and right both-side portions 142 of the first shade portion 14 and the position restricting portion of the left and right both-side portions 152 of the second shade portion 15. 24, 25 and 27 are fitted to each other, and the left and right both-side portions 142 of the first shade portion 14 and the left and right both-side portions 152 of the second shade portion 15 are in contact with each other, so that the first shade portion 14 And the rigidity and strength of the second shade portion 15 are improved, and the component accuracy is further improved.

  Further, in the vehicle headlamp 1 according to this embodiment, since the plate thickness of the second shade portion 15 is thicker than the plate thickness of the first shade portion 14 integrated with the spring member 6, Even if the plate thickness of the first shade portion 14 is reduced, the first shade portion 14 and the second shade portion 15 are fixed by restricting the positions thereof by the position restricting portions 23 to 27. The rigidity and strength with the two shade portions 15 are improved, and the component accuracy is improved. On the other hand, the vehicular headlamp 1 according to this embodiment can reduce the plate thickness of the first shade portion 14 integrated with the spring member 6 even if the plate thickness of the second shade portion 15 is increased. The plate thickness of the spring member 6 can be reduced, and the spring performance of the spring member 6 is improved correspondingly, and the spring force as designed is easily obtained.

  Furthermore, in the vehicle headlamp 1 according to this embodiment, since the position restricting portion provided in either one of the first shade portion 14 and the second shade portion 15 includes the convex beads 23 and 27, the first The rigidity and strength of the shade portion 14 and the second shade portion 15 can be further improved. On the other hand, in the vehicular headlamp 1 according to this embodiment, the position restricting portion provided on either one of the first shade portion 14 and the second shade portion 15 is a concave bead 25 into which the convex beads 23 and 27 are fitted. Or since it consists of fitting parts, such as the slits 24 and 26, manufacture is simple and can reduce manufacturing cost.

  Hereinafter, examples other than the above-described embodiment will be described. In the above-described embodiment, the position restricting portions 22 to 27 are respectively provided in the left and right both-side portion 142 of the first shade portion 14 and the left and right both-side portion 152 of the second shade 15. However, in the present invention, the position restricting portions 22 to 27 may be provided on the left or right intermediate portion 142 of the first shade portion 14 and the left or right intermediate portion 152 of the second shade 15. .

  In the above embodiment, the passing light distribution pattern LP shown in FIG. 7 and the traveling light distribution pattern HP shown in FIG. 8 are obtained. However, in the present invention, a light distribution pattern for passing and a light distribution pattern for highways can be obtained, or a light distribution pattern for passing, a light distribution pattern for highways, and a light distribution pattern for traveling can be obtained. That is, a plurality of light distribution patterns may be obtained.

  Further, in the above embodiment, the solenoid 7 is used as the drive unit. However, in the present invention, the drive unit may be other than the solenoid. For example, a motor.

FIG. 3 is a longitudinal sectional view (vertical sectional view) of the lamp unit when the shade is in a low beam posture according to the embodiment of the vehicle headlamp according to the present invention. Similarly, it is a front view which shows a shade and a spring member. Similarly, it is a perspective view which shows a shade and a spring member. Similarly, it is a top view which shows a shade and a spring member. Similarly, it is the VV sectional view taken on the line in FIG. Similarly, it is explanatory drawing which shows the manufacturing process of a shade and a spring member. Similarly, it is explanatory drawing which shows the light distribution pattern for passing. Similarly, it is explanatory drawing which shows the light distribution pattern for driving | running | working.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Light source 3 Reflector 4 Projection lens 5 Shade 6 Spring member 7 Solenoid (drive unit)
8 Frame member 9 Stopper 10 Socket mechanism 11 Light emitting part 12 Through-hole 13 Reflecting surface 14 First shade part 140 Left and right both end parts 141 Central part 142 Left and right both parts 15 Second shade part 150 Left and right both end parts 151 Central part 152 Between both left and right Part 16 Mounting part 17 First edge 18 Second edge 19 Fixing part 20 Screw 21 Advance / Retreat rod 22 Fixing means 23 Convex bead (position restricting part)
24 Slit (Position restriction part)
25 Concave bead (position restricting part)
26 Slit (Position restriction part)
27 Convex beads (Position restriction part)
LP Light distribution pattern for passing CL Cut-off line HP Light distribution pattern for traveling HL-HR Horizontal line on the left and right VU-VD Vertical line on the top and bottom (vertical vertical axis)
ZZ Optical axis of the reflecting surface Z1-Z1 Optical axis of the projection lens F1 First focus of the reflecting surface F2 Second focus of the reflecting surface F3 Focus of the projection lens L1 Light from the light source to the lower reflecting surface L2 From the light source to the upper side L3 Reflected light L3 Reflected light from lower reflective surface L4 Reflected light from upper reflective surface L6 Reflected light to be used effectively S Gap

Claims (4)

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 in front of the vehicle;
A shade that switches reflected light from the reflector toward the projection lens to a plurality of beams from which the plurality of light distribution patterns are obtained;
A spring member and a drive unit that switch the posture of the shade to a plurality of postures from which the plurality of beams can be obtained;
With
The shade is composed of two plate structures in which a first shade portion and a second shade portion of separate plate members are fixed to each other,
The first shade portion and the spring member have an integral structure,
Each of the first shade part and the second shade part is provided with a position restriction part that fits each other and regulates the position of each other.
A vehicle headlamp characterized by that. The left and right end portions of the first shade portion and the left and right end portions of the second shade portion are fixed to each other,
A gap is provided between the central portion of the first shade portion and the central portion of the second shade portion,
The portion from the center portion of the first shade portion to at least one of the left and right end portions and the portion from the center portion of the second shade portion to at least one of the left and right end portions are in contact with each other. ,
The position restriction is applied to a portion from the center portion of the first shade portion to at least one of the left and right end portions and a portion from the center portion of the second shade portion to at least one of the left and right end portions. Each part is provided,
The vehicle headlamp according to claim 1. The plate thickness of the second shade portion is thicker than the plate thickness of the first shade portion,
The vehicle headlamp according to claim 1 or 2, characterized in that The position restricting portion includes a convex bead provided on any one of the first shade portion and the second shade portion, and a concave bead or a slit provided on the other and fitted with the convex bead. And consists of
The vehicle headlamp according to any one of claims 1 to 3, wherein

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