JP2013052702A - Projector type head lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost projector type head lamp that irradiates a road surface in a turning direction at the time of turning (cornering, for example).SOLUTION: The head lamp 1 forms additional distribution patterns for irradiating a region above the horizon with reflection light according to a second reflection surface 43, in addition to a low-beam distribution pattern. When a motorcycle travels upright, the head lamp 1 irradiates a signboard or a traffic sign located in the upper front of the motorcycle with the additional distribution patterns. When the motorcycle turns a corner, the additional distribution patterns moves below the horizon to irradiate the road surface in a turning (advancing) direction. No additional lamp unit or shutter drive device is required, thereby preventing cost increase accordingly, and configuring the head lamp 1 at a lower cost than prior arts.

Description

  The present invention relates to a projector-type headlamp, and more particularly to a projector-type headlamp for a motorcycle configured to irradiate a road surface in a turning direction when turning (for example, cornering).

  Conventionally, in the field of motorcycle headlamps, there has been proposed a projector-type headlamp configured to irradiate a road surface in a turning direction during turning (for example, during cornering) (see, for example, Patent Document 1). ).

  As shown in FIG. 5, the projector-type headlamp 200 described in Patent Document 1 includes a low beam lamp 210 and cornering lamps 220 arranged on both the left and right sides thereof.

  The low beam lamp 210 is a headlamp unit configured to form a low beam light distribution pattern P1 (see FIG. 6A). As shown in FIG. 5, the low beam lamp 210 is the same as a general projector type headlamp. A projection lens 211, a light source 212, a reflecting surface 213, a shade 214, and the like.

  According to the low beam lamp 210, a part of the light emitted from the light source 212 and reflected by the reflecting surface 213 is shielded by the shade 214, and the image is projected by the projection lens 211, whereby the low beam light distribution pattern. P1 is formed (see FIG. 6A).

  The cornering lamp 220 is a headlamp unit configured to be switchable between the additional light distribution pattern P2 shown in FIG. 6A and the additional light distribution pattern P3 shown in FIG. 6B. As shown in FIG. 7B, a projection lens 221, a light source 222, and a reflecting surface 223 are provided in the same manner as a general projector type headlamp, but the shade 224 is that of a general projector type headlamp. Is different.

  In other words, the shade 224 of the cornering lamp 220 is not limited to the fixed shade 224a used in a general projector-type headlamp, but also the light shielding position shown in FIG. The movable shade 224b whose arrangement is switched to the retracted position shown in FIG.

  According to this cornering lamp 220, when the operation switch of the direction indicator is OFF, a part of the light emitted from the light source 222 and reflected by the reflecting surface 223 is the movable shade 224b located at the light shielding position in FIG. And the image is projected by the projection lens 221 to form an additional light distribution pattern P2 as shown in FIG. On the other hand, when the operation switch of the direction indicator is turned on, the movable shade 224b moves to the retracted position shown in FIG. 7A, so that a part of the light emitted from the light source 222 and reflected by the reflecting surface 223 is fixed shade. The light is shielded by 224a and the image is projected by the projection lens 221 to form a light distribution pattern P3 as shown in FIG. 6B. Thereby, the road surface in the turning direction is irradiated during turning (for example, during cornering).

JP 2008-1306 A

  However, in the projector-type headlamp 200 for a motorcycle having the above-described configuration, two cornering lamps 220 are added in addition to the low beam lamp 210, although the road surface in the turning direction is irradiated during turning (for example, cornering). Due to the configuration, there is a problem that the cost increases accordingly.

  The present invention has been made in view of such circumstances, and a projector-type headlamp capable of irradiating a road surface in the turning direction during turning (for example, during cornering) is configured at low cost. Objective.

In order to solve the above problems, the invention according to claim 1 is a projector-type headlamp,
A light source;
A projection lens disposed in front of the light source and having a back focal point between the light source;
A reflector having an inner reflection surface including a first reflection surface that reflects light from the light source forward and collects the light at the rear focal point;
A shutter that blocks part of the light reflected by the first reflecting surface;
With
The shutter has an upper edge portion disposed at or near the rear focal point, and an overhang portion extending from the upper edge portion toward the light source side,
A second reflecting surface that reflects a part of the reflected light from the first reflecting surface is provided on the upper surface of the overhang portion,
The second reflecting surface reflects a portion of the reflected light reflected at the inner reflecting surface at least once after being reflected by the second reflecting surface with respect to a vertical line on a virtual vertical screen facing the front end of the vehicle when standing upright. It is configured to be directed to the left and right and above the horizontal line.

The invention according to claim 2 is the projector type headlamp according to claim 1,
The second reflecting surface reflects light reflected by the first reflecting surface on the virtual vertical screen after a part of the reflected light reflected by the second reflecting surface is reflected by the first reflecting surface. It is configured so as to be directed to a region left and right with respect to the vertical line and above the horizontal line.

The invention according to claim 3 is the projector-type headlamp according to claim 1 or 2,
The projection lens projects reflected light forward corresponding to the second reflecting surface.

The invention according to claim 4 is the projector-type headlamp according to any one of claims 1 to 3,
The projector-type headlamp forms a low beam light distribution pattern including a cut-off line defined by an upper edge of the shutter in a region below a horizontal line on the virtual vertical screen,
An additional light distribution pattern having an illuminance lower than that of the low beam light distribution pattern is formed in a region above a horizontal line on the virtual vertical screen by reflected light corresponding to the second reflection surface.

The invention according to claim 5 is the projector-type headlamp according to claim 4,
The additional light distribution pattern formed in the region above the horizontal line on the virtual vertical screen by reflected light according to the second reflective surface has lower illuminance than the low beam light distribution pattern, and the additional light distribution. A bright part light distribution pattern having higher illuminance than the light pattern is formed as a pair on the left and right sides of the vertical line on the virtual vertical screen.

According to the present invention, the projector-type headlamp reflects the light emitted from the light source toward the left and right and above the horizontal line with respect to the vertical line on the virtual vertical screen facing the front end of the vehicle when standing upright. Since the second reflection surface is provided, an area above the horizontal line ahead of the vehicle can be illuminated according to the reflected light from the second reflection surface. Also, when turning (cornering), the reflected light from the second reflecting surface can be moved below the horizon to illuminate the road surface in the turning direction (traveling direction), so a cornering lamp unit has been added. It is not necessary to provide a driving device for switching the shutter (shade) arrangement.
That is, an additional lamp unit and a shutter (shade) driving device are not necessary, and the cost increase can be suppressed. Therefore, the projector type headlamp can be configured at a lower cost than the conventional technology.

It is a vertical sectional view showing a projector type headlamp according to the present invention. It is a perspective view which shows the shutter of the projector type headlamp which concerns on this invention. It is explanatory drawing regarding the light distribution characteristic of the projector type headlamp which concerns on this invention, the light distribution pattern (a) by an upright motorcycle, and the light distribution pattern (b) by the motorcycle which inclined the vehicle to the left side at the time of left corner cornering Is shown. It is explanatory drawing regarding the light distribution characteristic of the projector type headlamp which concerns on this invention, the light distribution pattern (a) by an upright motorcycle, and the light distribution pattern (b) by the motorcycle which inclined the vehicle to the left side at the time of left corner cornering Is shown. FIG. 6 is a top view for explaining a configuration of a conventional projector headlamp for a motorcycle. It is explanatory drawing regarding the light distribution characteristic of the conventional projector type headlamp for motorcycles, The light distribution pattern (a) at the time of a vehicle body upright posture, and the light distribution pattern (b) at the time of a bank are shown. It is the longitudinal cross-sectional view (a) which shows the conventional cornering lamp, and the perspective view (b) which shows the shade of the cornering lamp.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

  In the following description, “upper”, “lower”, “front”, “rear”, “left”, and “right” are each equipped with a projector-type headlamp 1 (hereinafter referred to as headlamp 1). “Up”, “Down”, “Front”, “Rear”, “Left”, “Right” of the vehicle. Therefore, “left” and “right” are determined from the rear to the front of the vehicle (from the viewpoint of the driver).

  The headlamp 1 of the present embodiment is a lamp unit (low beam headlamp) configured to form a low beam light distribution pattern, and is disposed at the front of the vehicle body. For example, the headlamp 1 is arranged on the left side of the front part of the vehicle body, and the lamp unit (high beam headlamp) configured to form a high beam light distribution pattern is arranged on the right side of the front part of the vehicle body.

  FIG. 1 is a cross-sectional view of the headlamp 1, which is a vertical cross-sectional view along a vertical plane that passes through an optical axis Ax (center axis) extending in the front-rear direction and is orthogonal to the horizontal plane.

  As shown in FIG. 1, the headlamp 1 is disposed between a light source 10, a reflector 20 that holds the light source 10, a projection lens 30 disposed in front of the light source 10, and the projection lens 30 and the light source 10. A shutter 40 and the like are provided.

The light source 10 is a part that emits light, and the light source 10 is inserted into a mounting hole 25 provided behind the reflector 20 and attached.
As the light source 10, for example, a halogen bulb (halogen bulb), HID, an incandescent bulb, a semiconductor light emitting element, or the like can be used.

The reflector 20 is a member having a substantially trumpet shape that expands toward the front. An opening 24 to which the projection lens 30 is attached is formed on the front end side, and a mounting hole 25 to which the light source 10 is attached on the rear end side. Is formed.
On the inner surface of the reflector 20, an inner reflection surface formed by plating such as aluminum vapor deposition is provided.

An inner surface of the reflector 20 is provided with an elliptical concave first reflecting surface 21, an upper inner reflecting surface 22, and a lower inner reflecting surface 23. The first reflecting surface 21, the upper inner reflecting surface 22, and the lower inner reflecting surface 23 form part of the inner reflecting surface of the reflector 20, and the first reflecting surface 21 is included in the inner reflecting surface of the reflector 20. .
The first reflecting surface 21 occupies a region closer to the rear mounting hole 25 than the optical axis Ax on the inner surface of the reflector 20.
The upper inner reflection surface 22 occupies a region on the inner surface of the reflector 20 above the optical axis Ax and near the front opening 24.
The lower inner reflecting surface 23 occupies a region below the optical axis Ax on the inner surface of the reflector 20.

The first reflecting surface 21 is, for example, a spheroidal surface having an optical axis Ax extending in the front-rear direction as a rotation axis, a flat elliptic surface obtained by crushing the spheroidal surface up and down (or left and right), or a free-form surface based on these. It is. Moreover, the 1st reflective surface 21 may be a composite ellipsoid combining two or more of these spheroidal surfaces, flat elliptical surfaces, and free-form surfaces.
Since the first reflecting surface 21 is formed as an elliptical surface, the first focal point F1 is set in front of the rear vertex of the elliptical surface, and the second focal point F2 is set in front of the first focal point F1. The An axis passing through the first focus F1 and the second focus F2 is the optical axis Ax.
The upper inner reflection surface 22 is a concave surface continuously provided in front of the first reflection surface 21 across a step, and is, for example, a free curved surface based on an arc.
The lower inner reflecting surface 23 is a concave surface provided in a region below the optical axis Ax in the inner reflecting surface of the reflector 20, and is, for example, a free curved surface based on an arc.

  The light source 10 mounted in the mounting hole 25 of the reflector 20 is fixed in a state of protruding to the inside of the reflector 20, and the light emitting point (for example, a bulb filament) of the light source 10 is fixed to the first reflecting surface 21. The first focal point F1 is arranged at or near the first focal point F1.

The projection lens 30 is held by a lens holder 35. The projection lens 30 is attached to the opening 24 of the reflector 20 via the lens holder 35 and is disposed in front of the light source 10.
The projection lens 30 is a convex lens, and has a rear focal point F3 and an optical axis extending forward and backward through the rear focal point F3. The optical axis of the projection lens 30 substantially coincides with the optical axis Ax as a lamp. The rear focal point F3 of the projection lens 30 is located at or near the second focal point F2 of the first reflecting surface 21.

The shutter 40 is disposed between the projection lens 30 and the light source 10.
The shutter 40 is, for example, a plate-like member extending in the left-right direction. As shown in FIGS. 1 and 2, the shutter 40 includes an upper edge portion 41 having a substantially horizontal upper edge, and an upper edge portion 41. It has the overhang | projection part 42 extended toward the light source 10 side.
The left and right ends of the shutter 40 are fixed to a part of the reflector 20, and the upper edge 41 of the shutter 40 is located at or near the rear focal point F3 on the optical axis Ax.
On the upper surface of the overhanging portion 42 of the shutter 40, a second reflecting surface 43 formed by aluminum deposition, silver coating, or the like is provided. The second reflecting surface 43 is a curved surface having an inclination that is lowered from the upper edge portion 41 toward the light source 10, that is, a curved surface that is inclined backward and downward from the upper edge portion 41.
The second reflecting surface 43 reflects a part of the reflected light from the first reflecting surface 21 of the reflector 20. In particular, the second reflecting surface 43 is desired by projecting a part of the reflected light reflected at the inner reflecting surface of the reflector 20 at least once after being reflected by the second reflecting surface 43 by the projection lens 30. For example, it is a free curved surface based on an arc. The second reflecting surface 43 may be a convex free curved surface or a concave free curved surface, or a curved surface in which a convex free curved surface and a concave free curved surface are combined. Also good. In addition, a curved surface that forms a free curved surface as a whole, although a flat surface is incorporated in a part thereof, may be used.
The lower end of the shutter 40 and the lower inner reflecting surface 23 are separated from each other, and a gap through which the reflected light can pass is formed.

  Next, the progress of light emitted from the light source 10 will be described.

The light source 10 is turned on, and the light emitted from the light source 10 is reflected forward by the first reflecting surface 21, and the reflected light is collected by the first reflecting surface 21 at or behind the rear focal point F <b> 3.
A part of the light reflected and collected by the first reflecting surface 21 passes forward on the upper edge of the upper edge portion 41 of the shutter 40, and the light is projected forward by the projection lens 30. .
Further, a part of the light reflected by the first reflecting surface 21 is shielded by the shutter 40.
A part of the light reflected by the first reflecting surface 21 is reflected again by the second reflecting surface 43 of the shutter 40. Most of the reflected light reflected by the second reflecting surface 43 travels to the inner reflecting surface side of the reflector 20, and after being reflected by the second reflecting surface 43, the inner reflecting surface (first reflecting surface 21, upper inner reflecting). The surface 22 and the lower inner reflecting surface 23) are reflected at least once.
Specifically, most of the reflected light reflected by the second reflecting surface 43 of the shutter 40 is directed to the first reflecting surface 21, reflected downward by the first reflecting surface 21, and then reflected by the lower inner reflecting surface 23. The light is reflected forward, passes forward under the lower end of the shutter 40, and the reflected light is projected forward by the projection lens 30.
Of the reflected light reflected by the second reflecting surface 43, there is also a slight amount of light that is reflected forward, passes through the projection lens 30 as it is, and is projected forward. Further, of the reflected light reflected by the second reflecting surface 43, the light that is directed toward the upper inner reflecting surface 22, reflected by the upper inner reflecting surface 22, passes through the projection lens 30, and is projected slightly forward. is there.
In the present embodiment, out of the reflected light reflected by the second reflecting surface 43 of the shutter 40, it is reflected downward by the first reflecting surface 21 after being reflected by the second reflecting surface 43, and further forward by the lower inner reflecting surface 23. The free-form surface of the second reflecting surface 43 is designed so that a desired light distribution pattern can be formed by controlling the locus of reflected light that is reflected by the projection lens 30 and projected forward by the projection lens 30.

  Next, the light distribution characteristics of the headlamp 1 will be described.

FIG. 3 shows a light distribution pattern formed on the virtual vertical screen facing the vehicle at a predetermined distance forward from the headlamp 1.
In FIG. 3, when the motorcycle stands upright, the intersection of the horizontal plane passing through the optical axis Ax of the headlamp 1 and the virtual vertical screen is shown as the H axis, and the intersection of the vertical plane passing through the optical axis Ax and the virtual vertical screen Is shown as the V-axis. The intersection of the H axis and the V axis is the intersection of the optical axis Ax of the headlamp 1 and the virtual vertical screen. The optical axis Ax is orthogonal to the H axis and the V axis.

  The light emitted from the light source 10 in the upright motorcycle is reflected by the first reflecting surface 21, and part of the reflected light collected near the optical axis Ax is shielded by the shutter 40 in the vicinity of the rear focal point F3. The optical image is projected forward of the vehicle by the projection lens 30. As a result, as shown in FIG. 3A, the low beam light distribution pattern P1 including the cut-off line CL defined by the upper edge portion 41 of the shutter 40 is formed on the virtual vertical screen facing the front end of the vehicle. The Note that the cut-off line CL of the low beam light distribution pattern P1 overlaps the H axis.

Moreover, it is a part of the reflected light from the first reflecting surface 21, and is directed to the first reflecting surface 21 out of the reflected light reflected by the second reflecting surface 43 of the shutter 40, and downwards on the first reflecting surface 21. After being reflected, the light reflected forward by the lower inner reflecting surface 23 is projected forward by the projection lens 30. As a result, as shown in FIG. 3A, the additional light distribution pattern is formed in a region left and right of the vertical line (V axis) on the virtual vertical screen facing the front end of the vehicle and above the horizontal line (H axis). P2 is formed.
The additional light distribution pattern P2 has a wider irradiation area than the low beam light distribution pattern P1. However, since the additional light distribution pattern P2 is designed to have lower illuminance than the low beam light distribution pattern P1, the driver (rider) of the oncoming vehicle is not dazzled by the additional light distribution pattern P2. This is because the second light-reflecting surface 43 and the first light-reflecting surface 21 are arranged so that the additional light distribution pattern P2 that illuminates the region above the horizon in front of the vehicle has a bank light distribution that satisfies the light distribution standard defined by law. This is because the free-form surface is designed.

  Here, as shown in FIG. 3B, when the vehicle is tilted to the left side (for example, a bank angle of 36 °) during left corner cornering, the headlamp 1 is also tilted. As a result, the additional light distribution pattern P2 that has irradiated the region above the horizontal line (H-axis) so far moves below the horizontal line (H-axis) and irradiates the road surface on the left front of the rider. Since the road surface area irradiated by the additional light distribution pattern P2 moved below the horizontal line (H axis) is located in the direction of the rider's line of sight at the left corner cornering, the visibility at the left corner cornering can be greatly improved. It becomes possible, and it becomes possible to realize a comfortable cornering.

  Similarly, when the vehicle is tilted to the right side during corner cornering (for example, a bank angle of 36 °), the headlamp 1 is also tilted. As a result, the additional light distribution pattern P2 that has irradiated the region above the horizontal line (H-axis) so far moves below the horizontal line (H-axis) and irradiates the road surface on the right front of the rider. Since the road surface area irradiated by the additional light distribution pattern P2 moved below the horizontal line (H axis) is located in the direction of the rider's line of sight at the right corner cornering, the visibility at the right corner cornering can be greatly improved. It becomes possible, and it becomes possible to realize a comfortable cornering.

As described above, the headlamp 1 of the present embodiment includes the shutter 40 having the second reflecting surface 43 that reflects a part of the reflected light from the first reflecting surface 21, and the second reflecting surface of the shutter 40. 43 reflects the reflected light from the first reflecting surface 21 by the second reflecting surface 43 and then reflects the reflected light at least once by the inner reflecting surface (in particular, the first reflecting surface 21 and the lower inner reflecting surface 23). Is designed and configured as a free-form surface that allows it to be directed to the area on the left and right and above the horizontal line with respect to the vertical line on the virtual vertical screen facing the front end of the vehicle when standing upright, The area above the horizontal line ahead of the vehicle can be illuminated with the additional light distribution pattern P2 in accordance with the reflected light from the second reflecting surface 43.
Specifically, the headlamp 1 of the present embodiment reflects a part of the reflected light from the first reflecting surface 21 by the second reflecting surface 43 of the shutter 40 and directs the reflected light to the first reflecting surface 21. Then, the reflected light reflected downward by the first reflecting surface 21 is directed toward the lower inner reflecting surface 23, and the reflected light reflected forward by the lower inner reflecting surface 23 is projected forward by the projection lens 30, Since the vertical line on the virtual vertical screen that faces the front end of the vehicle when standing upright can be directed to the left and right and above the horizontal line, the vehicle can be used in accordance with the reflected light from the second reflecting surface 43. The area above the front horizontal line can be illuminated with the additional light distribution pattern P2.

If the motorcycle stands upright, the signboard, the sign, and the like on the front upper side of the motorcycle can be illuminated with the additional light distribution pattern P2 of the headlamp 1.
In particular, if the motorcycle is cornered and tilted left and right, the road surface in the traveling direction can be irradiated by the additional light distribution pattern P2 of the headlamp 1.

As described above, the headlamp 1 according to the present embodiment has an additional distribution in which the region above the horizontal line (H axis) is illuminated relatively widely by the reflected light corresponding to the second reflecting surface 43 in addition to the low beam light distribution pattern P1. Since the light pattern P2 can be formed, when the motorcycle is running upright, the additional light distribution pattern P2 of the headlamp 1 can illuminate the signboard and signs on the front upper side of the motorcycle, and the upper sign Etc. are easily visible.
Further, when the motorcycle is cornering, the road surface in the traveling direction can be irradiated with the additional light distribution pattern P2 of the headlamp 1, so that the visibility in the traveling direction is improved and safe traveling is realized. Can do.

In particular, the headlamp 1 of the present embodiment forms a low beam light distribution pattern P1 that illuminates a region below the horizontal line (H axis) and an additional light distribution pattern P2 that illuminates a region above the horizontal line (H axis). Since the additional light distribution pattern P2 can be moved below the horizontal line (H axis) during turning (cornering), the bank light distribution can be obtained to illuminate the road surface in the turning direction (traveling direction). There is no need to add a lamp unit for cornering or to provide a driving device for switching the arrangement of the shutter (shade).
That is, an additional lamp unit and a shutter (shade) driving device are not required, and an increase in the cost can be suppressed, so that the headlamp 1 can be configured at a lower cost than the conventional technology.

The present invention is not limited to the above embodiment.
For example, by changing the design of the free-form surface of the second reflective surface 43 and providing several reflective singularities on the second reflective surface 43, the light distribution of the additional light distribution pattern P2 corresponding to the second reflective surface 43 The characteristics may be adjusted. For example, as shown in FIG. 4, in the additional light distribution pattern P2 formed in the region above the horizontal line (H axis) on the virtual vertical screen facing the front end of the vehicle when standing upright, the low beam light distribution pattern P1 Alternatively, the light portion light distribution patterns P2 _L and P2 _R having low illuminance and higher illuminance than the additional light distribution pattern P2 may be formed as a pair on the left and right sides of the vertical line (V axis) on the virtual vertical screen. .
Specifically, the light reflected by the second reflecting surface 43 whose design has been changed is projected to the front of the vehicle by the projection lens 30, so that a virtual vertical screen facing the front end of the vehicle as shown in FIG. An additional light distribution pattern P2 is formed in a region left and right of the upper vertical line (V-axis) and above the horizontal line (H-axis). The additional light distribution pattern P2 includes the additional light distribution pattern. However, a pair of left and right bright portion light distribution patterns P2 _L and P2 _R that are relatively brighter than the surroundings are formed.
Since the bright portion light distribution patterns P2 _L and P2 _R are designed to have lower illuminance than the low beam light distribution pattern P1 in the same manner as the additional light distribution pattern P2, the driver (rider) of the oncoming vehicle can add light distribution. It is not dazzled by the pattern P2 (bright part light distribution pattern P2 _L , P2 _R ).

Then, as shown in FIG. 4B, when the vehicle is tilted to the left side (for example, a bank angle of 36 °) during left corner cornering, the headlamp 1 is also tilted. As a result, the additional light distribution pattern P2 that has irradiated the region above the horizontal line (H-axis) so far moves below the horizontal line (H-axis) and irradiates the road surface on the left front of the rider. In particular, the bright part light distribution pattern P2 _L in the additional light distribution pattern P2 that has moved below the horizon (H axis) illuminates the road surface in front of the rider's left front, thereby further improving the visibility during corner cornering. Can be made.

Similarly, when the vehicle is tilted to the right side during corner cornering (for example, a bank angle of 36 °), the headlamp 1 is also tilted. As a result, the additional light distribution pattern P2 that has irradiated the region above the horizontal line (H-axis) so far moves below the horizontal line (H-axis) and irradiates the road surface on the right front of the rider. In particular, the bright portion light distribution pattern P2 _R in the additional light distribution pattern P2 that has moved below the horizon (H axis) irradiates the road surface in front of the rider's right front, thereby further improving the visibility at the right corner cornering. Can be made.

As described above, if the brighter light distribution patterns P2 _L and P2 _R are formed in the additional light distribution pattern P2, the additional light distribution pattern of the headlamp 1 can be obtained when the motorcycle is cornering. Since the bright surface light distribution patterns P2 _L and P2 _R in P2 can irradiate the road surface in the traveling direction (turning direction), visibility in the traveling direction is improved, and safe traveling can be realized.

In the above embodiment, only the additional light distribution pattern P2 is formed according to the reflected light from the second reflecting surface 43, and the additional light distribution including the bright portion light distribution patterns P2 _L and P2 _R is provided. The formation of the pattern P2 has been described as an example, but the present invention is not limited to this, and the left and right regions above the horizontal line (H axis) according to the reflected light from the second reflecting surface 43. May be designed so that only the bright portion light distribution patterns P2 _L and P2 _R are formed.

In the above embodiment, the headlamp 1 is applied to a motorcycle headlamp, and the additional light distribution pattern P2 (the bright portion light distribution patterns P2 _L and P2 _R ) is used as bank light distribution. Although described as an example, the present invention is not limited to this, and the headlamp 1 is applied to a headlamp for an automobile, and an additional light distribution pattern P2 (light portion light distribution pattern P2 _L , P2 _R ) may be used as overhead sign illumination for illuminating the front upper signboard or sign.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

1 Headlamp (Projector type headlamp)
10 Light Source 20 Reflector 21 First Reflecting Surface 22 Upper Inner Reflecting Surface (Inner Reflecting Surface)
23 Lower inner reflective surface (inner reflective surface)
30 Projection lens 40 Shutter 41 Upper edge portion 42 Overhang portion 43 Second reflecting surface F1 First focus F2 Second focus F3 Rear focus P1 Low beam light distribution pattern P2 Additional light distribution pattern P2 _L Bright portion light distribution pattern P2 _R Bright part light distribution pattern Ax Optical axis

Claims (5)

A light source;
A projection lens disposed in front of the light source and having a back focal point between the light source;
A reflector having an inner reflection surface including a first reflection surface that reflects light from the light source forward and collects the light at the rear focal point;
A shutter that blocks part of the light reflected by the first reflecting surface;
With
The shutter has an upper edge portion disposed at or near the rear focal point, and an overhang portion extending from the upper edge portion toward the light source side,
A second reflecting surface that reflects a part of the reflected light from the first reflecting surface is provided on the upper surface of the overhang portion,
The second reflecting surface reflects a portion of the reflected light reflected at the inner reflecting surface at least once after being reflected by the second reflecting surface with respect to a vertical line on a virtual vertical screen facing the front end of the vehicle when standing upright. A projector-type headlamp configured to be directed to an area on the left and right and above the horizontal line.   The second reflecting surface reflects light reflected by the first reflecting surface on the virtual vertical screen after a part of the reflected light reflected by the second reflecting surface is reflected by the first reflecting surface. The projector-type headlamp according to claim 1, wherein the projector-type headlamp is configured to be directed to a region left and right of the vertical line and above the horizontal line.   The projector-type headlamp according to claim 1, wherein the projection lens projects the reflected light according to the second reflecting surface forward. The projector-type headlamp forms a low beam light distribution pattern including a cut-off line defined by an upper edge of the shutter in a region below a horizontal line on the virtual vertical screen,
The additional light distribution pattern having lower illuminance than the low beam light distribution pattern is formed in a region above a horizontal line on the virtual vertical screen by reflected light corresponding to the second reflection surface. The projector type headlamp as described in any one of 1-3.   The additional light distribution pattern formed in the region above the horizontal line on the virtual vertical screen by reflected light according to the second reflective surface has lower illuminance than the low beam light distribution pattern, and the additional light distribution. The projector-type headlamp according to claim 4, wherein a pair of left and right light portion light distribution patterns having higher illuminance than the light pattern are formed across a vertical line on the virtual vertical screen.

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