JP5452248B2 - Projector type headlight and shade - Google Patents

Description

  The present invention relates to a projector type headlamp and a shade.

  Conventionally, in a projector type headlamp, light emitted from a light source is reflected forward by a reflector, a part of the reflected light is shielded by a shade, and reflected light that is not shielded is projected forward by a projection lens. When a part of the reflected light is shielded by the shade, a light distribution pattern having a substantially horizontal light-dark boundary line is formed in front, and there is no light upward from the light-dark boundary line. Thereby, generation | occurrence | production of glare can be suppressed for an oncoming vehicle.

  When the motorcycle corners, the car body will bank. Since the projector-type headlight tilts according to the tilt of the vehicle body, the light / dark boundary line also tilts. Specifically, since the vehicle body is banked to the left at the left cornering, the light / dark boundary line is tilted to the left and the vehicle body is banked to the right at the cornering, so the light / dark boundary line is tilted to the right. Therefore, when a conventional projector type headlamp is used for a two-wheeled vehicle, the traveling direction becomes dark when the vehicle body is banked. That is, the left front is dark at the left cornering, and the right front is dark at the right cornering. Therefore, the rider cannot grasp the road surface condition.

  In order to solve such problems, in the projector type headlamp described in Patent Document 1, the shade is provided so as to swing left and right with respect to the reflector, the projection lens, and the light source. In this projector-type headlamp, the bank angle of the vehicle body is detected by a sensor, and the shade is tilted with respect to the reflector, the projection lens, and the light source by the control unit controlling the actuator according to the detected angle. . Therefore, even if the vehicle body is banked and the reflector, the projection lens, and the light source follow the vehicle body and are tilted to the left or right, the shade does not tilt, so the right or left front does not become dark.

Japanese Patent No. 2878811

However, in the technique of the above document, when the vehicle is banked, the shade is not tilted and the light source, the reflector and the projection lens are tilted to the left or right, so that the positional relationship between the light source and the optical system such as the reflector is changed. The extent of irradiation of the light pattern, the illuminance distribution, and the like change.
Therefore, the problem to be solved by the present invention is to prevent the right or left front from becoming dark when banking the vehicle body, and to change the extent of irradiation range of the light distribution pattern and the illuminance distribution before and after the vehicle bank. It is to be able to suppress.

  In order to solve the above problems, a projector-type headlamp according to the present invention includes a light source, a reflector that reflects light from the light source forward, a projection lens that projects reflected light from the reflector forward, A shade that shields a part of the reflected light from the reflector toward the projection lens to form a light distribution pattern having a light and dark boundary line, and the shade is disposed between the projection lens and the reflector. A central light-shielding portion having an upper edge extending in the left-right direction at or near the optical axis of the projection lens; a left light-shielding portion provided on the left side of the central light-shielding portion and having an upper edge extending in the left-right direction; A right light-shielding portion provided on the right side of the light-shielding portion and having an upper edge extending in the left-right direction, and the left light-shielding portion has a swing-up state in which the upper edge is aligned with the upper edge of the central light-shielding portion. The upper edge is swingably provided in a swinging-down state inclined downward to the left with respect to the upper edge of the central light shielding part, and the right light shielding part is swung up with the upper edge aligned with the upper edge of the central light shielding part The upper edge of the state is provided so as to be swingable in a swing-down state in which the upper edge is inclined downward with respect to the upper edge of the central light shielding portion.

  Preferably, the shade further includes a first stopper that contacts the left light shielding portion from above the left light shielding portion in a state where the upper edge of the left light shielding portion is aligned with the upper edge of the central light shielding portion. did.

  Preferably, the shade further includes a first weight provided in the left light shielding portion.

  Preferably, the shade further includes a second stopper that contacts the right light shielding portion from above the right light shielding portion in a state where the upper edge of the right light shielding portion is aligned with the upper edge of the central light shielding portion. did.

  Preferably, the shade further includes a second weight provided in the right light shielding portion.

  The shade according to the present invention is a shade that forms a light distribution pattern having a light-dark boundary line by shielding a part of reflected light from a reflector disposed behind a projection lens of a projector-type headlamp toward the projection lens. A central light-shielding portion disposed between the projection lens and the reflector and having an upper edge extending in the left-right direction at or near the optical axis of the projection lens, and provided on the left side of the central light-shielding portion, A left light-shielding portion having an upper edge extending in the left-right direction; and a right light-shielding portion provided on the right side of the central light-shielding portion and having an upper edge extending in the left-right direction, the left light-shielding portion having an upper edge at the center A swing-up state that is aligned with the upper edge of the light-shielding portion and a swing-down state in which the upper edge is inclined downward to the left with respect to the upper edge of the central light-shielding portion are provided so as to be swingable. The edge is And swung up state aligned in the upper edge of the part, it was decided that the upper edge is provided swingably to the swinging down inclined state downhill with respect to the upper edge of the central light shielding part.

According to the present invention, when the vehicle body is banked to the right, the upper edge of the central light shielding portion is inclined downward to the right with respect to the horizontal plane when viewed from behind. At that time, if the left light-shielding part swings down with respect to the central light-shielding part, the upper edge of the left light-shielding part is inclined downward to the left with respect to the upper edge of the central light-shielding part. Keep almost parallel. For this reason, the range shielded by the left light-shielding portion is narrowed, and the farther right can be illuminated.
On the other hand, when the vehicle body is banked to the left, the upper edge of the central light shielding portion is inclined downward to the left with respect to the horizontal plane when viewed from behind. At that time, when the right light-shielding part swings downward with respect to the central light-shielding part, the upper edge of the right light-shielding part is inclined downward to the right with respect to the upper edge of the central light-shielding part, but with respect to the horizontal plane Keep almost parallel. For this reason, the range shielded by the right light-shielding portion is narrowed, and the far left can be illuminated.
Further, if the vehicle body is banked to the left or right, the central light shielding portion is tilted to the left or right together with the projection lens, the reflector, and the light source. Therefore, it is possible to prevent the extent of irradiation of the basic light distribution pattern, the illuminance distribution, and the like from changing before and after the bank of the vehicle body.

It is a front perspective view of a projector type headlamp. It is a front perspective view of a shade and a light source. It is a rear perspective view of a shade. It is the figure which showed the light distribution pattern formed in a virtual screen by the projector type headlamp when the vehicle body is not banked. It is a front view of a shade when the vehicle body is banked to the right. It is the figure which showed the light distribution pattern formed in a virtual screen with a projector type headlamp when a vehicle body banks on the right. It is a front view of a shade when a vehicle body is banked to the left. It is the figure which showed the light distribution pattern formed in a virtual screen with a projector type headlamp when a vehicle body banked to the left.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.
Further, in the following description, “up”, “down”, “front”, “rear”, “left”, and “right” are respectively “up” and “up” of a motorcycle equipped with a projector-type headlight. "Down", "Front", "Back", "Left", "Right". Therefore, the left and right directions are determined by looking from the back to the front.

  FIG. 1 is a perspective view of a projector-type headlamp 1. FIG. 2 is a front perspective view of the shade 40 and the light source 10 of the projector type headlamp 1. FIG. 3 is a rear perspective view of the shade 40.

  The projector type headlamp 1 includes a light source 10, a reflector 20, a projection lens 30, and a shade 40. The reflector 20, the projection lens 30 and the shade 40 are attached to a housing (not shown), and the light source 10, the reflector 20, the projection lens 30 and the shade 40 are unitized.

  The reflector 20 is provided in a substantially bowl shape, and the reflector 20 opens toward the front. A reflective film such as aluminum vapor deposition or silver coating is applied to the inner surface of the reflector 20 to form a reflective surface 21. The reflective surface 21 is formed in an elliptical shape. The elliptical surface refers to a rotational elliptical surface or a flat elliptical surface having a central axis extending in the front-rear direction as a rotational axis, or a free curved surface based on these. A flat ellipsoid is a spheroid whose top and bottom or sides are crushed, and the shape of the vertical section along the front-rear direction is an ellipse, and the shape of the horizontal section is a parabola or an ellipse (vertical section). The distance between the focal points of the elliptical shape is different from the focal length of the elliptical shape of the horizontal cross section). The reflecting surface 21 may be a composite ellipsoid obtained by combining these spheroids, flat ellipsoids, or free-form surfaces.

  Since the reflecting surface 21 is formed into an elliptical surface, the first focal point F1 is set in front of the vertex of the elliptical surface, and the second focal point F2 is set in front of the first focal point F1. In addition, when the reflective surface 21 is formed in the flat elliptical surface or the free-form surface based on it, the 2nd focus F2 says a focal line. The focal line extends in the horizontal left-right direction, and is curved so that the central part in the left-right direction protrudes backward.

  A mounting hole 22 that penetrates the reflector 20 back and forth is formed at the apex of the reflecting surface 21. The light source 10 is passed through the mounting hole 22 from behind the reflector 20, and the light source 10 is fixed to the housing and the reflector 20 by a fixture (not shown) such as a socket, and the light source 10 is disposed in the reflector 20. The light source 10 is disposed on the first focal point F1 of the reflecting surface 21 or in the vicinity thereof. The light source 10 is a discharge lamp (for example, a high-intensity discharge lamp (HID), a high-pressure metal vapor discharge lamp, etc.), a halogen bulb, an incandescent bulb or other bulb. Note that a light emitting diode, an inorganic electroluminescent element, an organic electroluminescent element, or other light emitting element may be used instead of the bulb.

  The reflecting surface 21 reflects light emitted from the light source 10 forward, and condenses the reflected light at the second focal point F2.

  A projection lens 30 is disposed in front of the reflector 20. The projection lens 30 is a convex lens. The projection lens 30 is disposed so that the optical axis Ax of the projection lens 30 extends in the front-rear direction, and the focal point of the projection lens 30 is located at or near the second focal point F2 of the reflecting surface 21. The optical axis Ax of the projection lens 30 may be aligned with the central axis of the reflecting surface 21 or may be slightly shifted from the central axis of the reflecting surface 21.

  A shade 40 is provided at or near the second focal point F2. The shade 40 shields part of the reflected light that is reflected by the reflecting surface 21 and directed toward the projection lens 30 at or near the second focal point F2. The projection lens 30 projects the reflected light that is not shielded forward.

  The shade 40 includes a frame 50, a central light shielding plate 60, a left light shielding plate 70, a right light shielding plate 80, weights 91 and 92, and stoppers 53 and 54. In FIG. 1, illustration of the frame body 50 and the stoppers 53 and 54 is omitted.

  The frame 50 is disposed between the reflector 20 and the projection lens 30 and is fixed to a housing (not shown). The frame body 50 is provided in a thin plate shape, and is provided in a standing state so as to be perpendicular to the optical axis Ax. An opening 51 is formed in the frame 50, and the optical axis Ax passes through the opening 51. A pocket 52 bulging rearward is provided on the rear surface of the frame 50, and the lower part of the opening 51 is closed by the pocket 52, but the upper part of the opening 51 is not closed by the pocket 52.

  The central light shielding plate 60 as the central light shielding portion is provided in a thin plate shape, and is provided in a state standing with respect to a horizontal plane. One surface of the central light shielding plate 60 faces forward, and the other surface faces rearward. A rib 62 is provided on the rear surface of the central light shielding plate 60, and the central light shielding plate 60 is fixed to the frame body 50 by attaching the rib 62 to the front surface of the pocket 52 of the frame body 50. The central light shielding plate 60 is disposed between the projection lens 30 and the reflector 20 below the optical axis Ax. Specifically, the front / rear position of the central light shielding plate 60 is at or near the front / rear position of the second focal point F2.

  The central light shielding plate 60 has an upper edge 61. The upper edge 61 extends linearly in the left-right direction at or near the optical axis Ax when viewed from the front. Specifically, the vertical position of the upper edge 61 is aligned with the optical axis Ax1, or slightly lower than the optical axis Ax1, and the horizontal position of the left and right central portion of the upper edge 61 is the optical axis Ax. It is aligned.

  There is a step between the left portion (hereinafter referred to as the left upper edge) of the upper edge 61 of the central light shielding plate 60 and the right portion (hereinafter referred to as the right upper edge), and the left upper edge and the right portion. A portion between the upper edge (hereinafter referred to as an inclined portion) may be inclined with respect to the left upper edge and the right upper edge. Specifically, when the projector-type headlamp 1 is for left-hand traffic, the left upper edge is positioned above the right upper edge, and the inclined portion is inclined downward to the right. On the other hand, when the projector-type headlamp 1 is for right-hand traffic, the right upper edge is positioned above the left upper edge, and the inclined portion is inclined downward to the left.

  The left light shielding plate 70 as the left light shielding portion is provided in a thin plate shape elongated in the left-right direction. The left light shielding plate 70 is supported by the central light shielding plate 60 with one surface of the left light shielding plate 70 facing forward and the other surface facing rearward. The left light shielding plate 70 is disposed on the left side of the central light shielding plate 60, and the central light shielding plate 60 and the left light shielding plate 70 are overlapped on the left and right. In the overlapped portion, the right end portion of the left light shielding plate 70 is connected to the left end portion of the central light shielding plate 60 by a rotation shaft 72 located to the left of the optical axis Ax. Here, a rectangular cavity 73 is formed between the front surface and the rear surface of the left light shielding plate 70, and the cavity 73 extends from the right portion of the upper end surface of the left light shielding plate 70 to the left end surface of the left light shielding plate 70. Open to the top. The left portion of the central light shielding plate 60 is inserted into the cavity 73, and the left portion of the central light shielding plate 60 is sandwiched between the front surface portion and the rear surface portion of the left light shielding plate 70, and the rotation provided at the sandwiched portion. A shaft 72 connects the right end portion of the left light shielding plate 70 and the left end portion of the central light shielding plate 60.

  The rotating shaft 72 is provided in parallel to the front-rear direction, and the left light shielding plate 70 is provided so as to be able to swing up and down around the rotating shaft 72. The rotating shaft 72 is provided with an adjusting mechanism such as a damper and a spring (not shown), and resistance is given by the adjusting mechanism so as to restrict the rotation of the left light shielding plate 70 relative to the central light shielding plate 60.

  A right light shielding plate 80 as a right light shielding portion is provided in a thin plate shape elongated in the left-right direction. One surface of the right light shielding plate 80 faces forward, the other surface of the right light shielding plate 80 faces rearward, and the right light shielding plate 80 is supported by the central light shielding plate 60. A front-side rectangular cavity 83 is formed between the front surface and the rear surface of the right light shielding plate 80, and the cavity 83 opens from the right portion of the upper end surface of the right light shielding plate 80 to the upper portion of the left end surface of the right light shielding plate 80. doing. The right portion of the central light shielding plate 60 is inserted into the cavity 83, and the right portion of the central light shielding plate 60 is sandwiched between the front surface portion and the rear surface portion of the right light shielding plate 80. Thereby, the central light-shielding plate 60 and the right light-shielding plate 80 are overlapped on the left and right. In the overlapped portion, the left end portion of the right light shielding plate 80 is connected to the right end portion of the central light shielding plate 60 by a rotation shaft 82 located to the right of the optical axis Ax. The rotation shaft 82 is provided in parallel with the front-rear direction, and the right light shielding plate 80 is provided so as to be swingable up and down around the rotation shaft 82. The rotation shaft 82 is provided with an adjustment mechanism that gives resistance to the rotation shaft 82 so as to restrict the rotation of the right light shielding plate 80 with respect to the central light shielding plate 60.

  Step portions 64 and 65 are respectively provided on the upper front surface and the upper rear surface of the central light shielding plate 60 between the light shielding plates 70 and 80, and the thicknesses of the central light shielding plate 60 in the step portions 64 and 65 are different from each other. Thicker than the thickness of other parts. The thickness of the stepped portions 64 and 65 is substantially equal to the total thickness of the overlapping portion of the central light shielding plate 60 and the light shielding plates 70 and 80. Since the front and rear thicknesses of the lower portion of the step portion 64.65 are thin, the light shielding plates 70 and 80 swing up and down without interference between the light shielding plates 70 and 80 and the step portions 64 and 65. It can be done.

  A portion of the left light shielding plate 70 near the optical axis Ax (right portion) is curved so as to follow the focal line related to the second focal point F2, and the left portion of the left light shielding plate 70 is a flat plate perpendicular to the optical axis Ax. It is provided in the shape. A portion of the right light shielding plate 80 near the optical axis Ax (left portion) is curved so as to follow the focal line related to the second focal point F2, and a right portion of the right light shielding plate 80 is a flat plate perpendicular to the optical axis Ax. It is provided in the shape.

The left light shielding plate 70 has an upper edge 71. The upper edge 71 is formed in a straight line when viewed in the direction of the optical axis Ax from the front, and extends in the left-right direction on the left side of the optical axis Ax.
The right light shielding plate 80 has an upper edge 81. The upper edge 81 is formed in a straight line when viewed in the direction of the optical axis Ax from the front, and extends in the left-right direction on the right side of the optical axis Ax.

  Stoppers 53 and 54 are provided on the front surface of the frame 50 in a protruding manner. One stopper 53 is arranged on the left side of the opening 51 and above the left end portion of the left light shielding plate 70. The other stopper 54 is disposed on the right side of the opening 51 and above the right light shielding plate 80.

  When the left light shielding plate 70 is swung up around the rotation shaft 72 and the left light shielding plate 70 is in contact with the stopper 53, the upper edge 71 of the left light shielding plate 70 becomes the upper edge 61 of the central light shielding plate 60. It's all there. In a state where the left light shielding plate 70 is swung down around the rotation shaft 72 and the left light shielding plate 70 is separated from the stopper 53, the upper edge 71 of the left light shielding plate 70 becomes the upper edge 61 of the central light shielding plate 60. On the other hand, it is tilted downward to the left. When there is a step at the upper edge 61 of the central light shielding plate 60, the upper edge 71 of the left light shielding plate 70 is out of the upper edge 61 of the central light shielding plate 60 when the left light shielding plate 70 is in contact with the stopper 53. It is aligned with the upper left edge.

  When the right light shielding plate 80 is swung up around the rotation shaft 82 and the right light shielding plate 80 is in contact with the stopper 54, the upper edge 81 of the right light shielding plate 80 becomes the upper edge 61 of the central light shielding plate 60. It's all there. On the other hand, when the right light shielding plate 80 is swung down around the rotation shaft 82 and the right light shielding plate 80 is away from the stopper 54, the upper edge 81 of the right light shielding plate 80 is the upper edge of the central light shielding plate 60. It is inclined downward to the right with respect to 61. When there is a step at the upper edge 61 of the central light shielding plate 60, the upper edge 81 of the right light shielding plate 80 is included in the upper edge 61 of the central light shielding plate 60 when the right light shielding plate 80 is in contact with the stopper 54. It is aligned with the upper right edge.

A weight 91 is attached below the right end portion of the left light shielding plate 70 so as to hang down from the left light shielding portion 70. In a state where the upper edge 71 of the left light shielding plate 70 is in contact with the stopper 53, the weight 91 is positioned directly below the rotation shaft 72.
A weight 92 is attached below the left end portion of the right light shielding plate 80 so as to hang down from the right light shielding portion 80. In a state where the upper edge 81 of the right light shielding plate 80 is in contact with the stopper 54, the weight 92 is positioned directly below the rotation shaft 82.

Operations of the projector type headlamp 1 and the shade 40 will be described.
When the two-wheeled vehicle is traveling in a straight line, the vehicle body is standing and the upper edge 61 of the central light shielding plate 60 is horizontal. In such a straight running state, due to the gravity acting on the weight 91, the left light shielding plate 70 contacts the stopper 53, and the upper edge 71 of the left light shielding plate 70 is horizontal and aligned with the upper edge 61 of the central light shielding plate 60. Yes. The upper edge 81 of the right light shielding plate 80 is also horizontal and aligned with the upper edge 61 of the central light shielding plate 60. Therefore, as shown in FIG. 4, the virtual screen that is a predetermined distance away from the projector-type headlamp 1 has an H line (the H line is an intersection of the horizontal plane passing through the optical axis Ax and the virtual screen. )), A passing light distribution pattern P1 having a cut-off line (bright / dark boundary line) C1 at the upper edge of the bright portion is formed.

  When the two-wheeled vehicle is cornered to the right, the vehicle body is banked to the right, so that the upper edge 61 of the central light shielding plate 60 is inclined downward (leftward when viewed from the front) to the horizontal plane (front view of FIG. 5). reference). In the right bank, the left light shielding plate 70 is swung down relative to the central light shielding plate 60 by the gravity acting on the weight 91 and is separated from the stopper 53. As the bank angle of the vehicle body increases, the inclination angle of the upper edge 61 of the central light shielding plate 60 with respect to the horizontal plane increases, and the rotation angle of the left light shielding plate 70 with respect to the central light shielding plate 60 increases. Therefore, even if the vehicle body is banked to the right, the upper edge 71 of the left light shielding plate 70 is maintained substantially horizontal. On the other hand, since the right light shielding plate 80 contacts the stopper 54 and the gravity acting on the weight 92 is received by the stopper 54, the right light shielding plate 80 does not rotate relative to the central light shielding plate 60 even in the right bank. Therefore, the upper edge 81 of the right light shielding plate 80 is aligned with the upper edge 61 of the central light shielding plate 60, and the upper edge 81 is inclined downward to the right with respect to the horizontal plane.

  At the right bank of the vehicle body, since the upper edges 61 and 81 of the light shielding plates 60 and 80 are inclined downward to the right, the virtual screen has a cut inclined downward to the right with respect to the H line as shown in FIG. A light distribution pattern P2 having the off-line C2 at the upper edge of the bright part is formed. Further, since the left light shielding plate 70 is rotated relative to the central light shielding plate 60, the light shielding range is narrowed. Therefore, the cutoff line along the H line is above the cutoff line C4 of the light distribution pattern P2. A light distribution pattern P3 having C3 on the upper edge of the bright part is formed. Therefore, a light distribution pattern that combines the light distribution pattern P2 and the light distribution pattern P3 is formed on the virtual screen, and it is possible to illuminate far distances even during right cornering.

  When the vehicle body returns vertically from the banked state to the right, the upper edges 61 and 81 of the light shielding plates 60 and 80 return to the horizontal due to the weights of the weights 91 and 92. The left light-shielding plate 70 rotates in the opposite direction relative to the central light-shielding plate 60 due to the gravity acting on the weight 91 and comes into contact with the stopper 53, so that the upper edge 71 becomes horizontal.

  When the two-wheeled vehicle is cornered to the left, the vehicle body is banked to the left, so that the upper edge 61 of the central light shielding plate 60 is inclined to the left downward (right downward when viewed from the front) (front view of FIG. 7). reference). At the time of the left bank, the right light shielding plate 80 is swung down relative to the central light shielding plate 60 by the gravity acting on the weight 92 and is separated from the stopper 54. As the bank angle of the vehicle body increases, the inclination angle of the upper edge 61 of the central light shielding plate 60 with respect to the horizontal plane increases, and the rotation angle of the right light shielding plate 80 with respect to the central light shielding plate 60 increases. Therefore, even if the vehicle body is banked to the right, the upper edge 81 of the right light shielding plate 80 is maintained substantially horizontal. On the other hand, since the left light shielding plate 70 contacts the stopper 53 and the gravity acting on the weight 91 is received by the stopper 53, the left light shielding plate 70 does not rotate relative to the central light shielding plate 60 even in the left bank. Therefore, the upper edge 71 of the left light-shielding plate 70 is aligned with the upper edge 61 of the central light-shielding plate 60, and the upper edge 71 is inclined leftward and downward with respect to the horizontal plane. Therefore, as shown in FIG. 8, a light distribution pattern P4 having a cut-off line C4 inclined downward to the right with respect to the H line at the upper edge of the bright portion is formed by the light shielding plates 60 and 70, and cut along the H line. A light distribution pattern P5 having an off-line C5 at the upper edge of the bright portion is formed on the upper side of the cut-off line C4 of the light distribution pattern P4 by the right light shielding plate 80. Thus, at the time of left cornering, since the light shielding range by the right light shielding plate 80 is narrow, it is possible to illuminate far left.

  When the vehicle body returns to the left from the banked state, the upper edges 61 and 71 of the light shielding plates 60 and 70 return to the horizontal. The right light shielding plate 80 rotates in the opposite direction relative to the central light shielding plate 60 by gravity acting on the weight 92 and abuts against the stopper 54, and the upper edge 81 thereof becomes horizontal.

  As described above, according to the present embodiment, the far right visibility is improved during right cornering (see FIG. 6), and the far left visibility is improved during left cornering (see FIG. 8). It can greatly contribute to safe driving.

  When the vehicle body is banked, the entire optical system such as the light source 10, the reflector 20 and the projection lens 30 is tilted to the left or right, and one of the light shielding plates 70 and 80 and the central light shielding plate 60 follow the entire optical system. Tilt. For this reason, the light distribution patterns P2 and P4 which are basic at the time of banking are only tilted with respect to the light distribution pattern P1 at the normal time, and the extent of the irradiation range of the light distribution patterns P1, P2 and P4 and the illuminance distribution hardly change. Therefore, it is possible to avoid giving the rider a visual discomfort during cornering.

  Further, since the light shielding plates 70 and 80 are swung by gravity without using sensors, actuators, control circuits, etc., the projector type headlamp 1 can be configured to be simple and difficult to break down.

  Further, the light shielding plates 70 and 80 are formed because the thickness of the central light shielding plate 60 in the step portions 64 and 65 formed on the upper front surface and the upper rear surface of the central light shielding plate 60 is larger than the thickness in the other portions. Cut-off lines C1, C2, and C4 appear clearly.

  Embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. Hereinafter, some modifications will be described. The following modifications may be combined as much as possible.

[Modification 1]
In the above embodiment, the left and right parts of the central light shielding plate 60 are inserted into the cavities 73 and 83 of the light shielding plates 70 and 80, but the left and right parts of the central light shielding plate 60 are in front of or behind the light shielding plates 70 and 80. These light shielding plates 60, 70, 80 may be connected so as to overlap.

[Modification 2]
In the above-described embodiment, the central light shielding plate 60 is fixed to the frame body 50. However, the central light shielding plate 60 can swing so that the central light shielding plate 60 falls backward or forward from the standing state as described above. 50 may be connected. When the central light shielding plate 60 is tilted backward or forward by a driving source such as a solenoid, the light shielding plates 70 and 80 are tilted together with the central light shielding plate 60. When these light shielding plates 60, 70, 80 are tilted, the light reflected by the reflecting surface 21 is not shielded by the light shielding plates 60, 70, 80, so that a high beam light distribution pattern is formed.

[Modification 3]
In the above embodiment, the left light shielding plate 70 is rotated relative to the central light shielding plate 60 by the weight 91, but the left light shielding plate 70 is rotated by an actuator (for example, a motor, a solenoid, etc.). It may be. In this case, the bank angle of the vehicle body is detected by a detector (for example, a gyroscope, an inclinometer, etc.), the detected angle is output to the control circuit, and the actuator is controlled according to the detection angle input by the control circuit, The upper edge 71 of the left light shielding plate 70 is maintained substantially horizontal. The same applies to the right light shielding plate 80.

[Modification 4]
In the above embodiment, the left light shielding plate 70 is connected to the central light shielding plate 60, but the left light shielding plate 70 may be connected to the frame body 50. In this case, the connection position of the left light shielding plate 70 and the frame 50 is the same position as the rotation shaft 72 described above, and the left light shielding plate 70 is provided so as to be swingable up and down around the connection position. The same applies to the right light shielding plate 80.

[Modification 5]
In the above embodiment, the light source 10 that is a bulb is arranged with the optical axis Ax direction (front-rear direction) as the longitudinal direction. However, the light source 10 is arranged so that the longitudinal direction of the light source 10 intersects the optical axis Ax. It may be. For example, the light source 10 may be arranged horizontally so that the longitudinal direction of the light source 10 is the left-right direction.

DESCRIPTION OF SYMBOLS 1 Projector type headlamp 10 Light source 20 Reflector 21 Reflecting surface 22 Mounting hole 30 Projection lens 40 Shade 50 Frame 53 Stopper (1st stopper)
54 Stopper (second stopper)
60 Central shading plate (central shading part)
70 Left shading plate (left shading part)
80 Right shading plate (right shading part)
61, 71, 81 Upper edge 72, 82 Rotating shaft 91 Weight (first weight)
92 weight (second weight)

Claims (6)

A light source;
A reflector that reflects light from the light source forward;
A projection lens that projects the reflected light from the reflector forward;
A shade that shields a part of the reflected light from the reflector toward the projection lens and forms a light distribution pattern having a light / dark boundary line, and
The shade is
A central light-shielding portion disposed between the projection lens and the reflector and having an upper edge extending in the left-right direction at or near the optical axis of the projection lens;
A left shading part provided on the left side of the central shading part and having an upper edge extending in the left-right direction;
A right light-shielding part provided on the right side of the central light-shielding part and having an upper edge extending in the left-right direction,
The left shading part can swing between a swinging state in which the upper edge is aligned with the upper edge of the central shading part and a swinging state in which the upper edge is inclined downward to the left with respect to the upper edge of the central shading part Provided in
The right light-shielding portion can swing between a swing-up state in which the upper edge is aligned with the upper edge of the central light-shielding portion and a swing-down state in which the upper edge is inclined downward to the right with respect to the upper edge of the central light-shielding portion. A projector-type headlamp characterized by being provided in the projector.   The shade further includes a first stopper that contacts the left light-shielding portion from above the left light-shielding portion in a state where the upper edge of the left light-shielding portion is aligned with the upper edge of the central light-shielding portion. The projector type headlamp according to claim 1.   The projector-type headlamp according to claim 1, wherein the shade further includes a first weight provided on the left light-shielding portion.   The shade further includes a second stopper that contacts the right light shielding portion from above the right light shielding portion in a state where the upper edge of the right light shielding portion is aligned with the upper edge of the central light shielding portion. The projector type headlamp according to any one of claims 1 to 3.   The projector-type headlamp according to any one of claims 1 to 4, wherein the shade further includes a second weight provided in the right light-shielding portion. A shade that forms a light distribution pattern having a light / dark boundary line by shielding a part of reflected light from a reflector disposed behind a projection lens of a projector-type headlamp toward the projection lens,
A central light-shielding portion disposed between the projection lens and the reflector and having an upper edge extending in the left-right direction at or near the optical axis of the projection lens;
A left shading part provided on the left side of the central shading part and having an upper edge extending in the left-right direction;
A right light-shielding part provided on the right side of the central light-shielding part and having an upper edge extending in the left-right direction, and
The left shading part can swing between a swinging state in which the upper edge is aligned with the upper edge of the central shading part and a swinging state in which the upper edge is inclined downward to the left with respect to the upper edge of the central shading part Provided in
The right light-shielding portion can swing between a swing-up state in which the upper edge is aligned with the upper edge of the central light-shielding portion and a swing-down state in which the upper edge is inclined downward to the right with respect to the upper edge of the central light-shielding portion. Shade characterized by being provided in.

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