JP4107527B2 - Motorcycle headlights - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a headlight for a two-wheeled motor vehicle (motorcycle). Specifically, the headlight tilts at the same time as the vehicle body tilts when turning, which is a characteristic operation of a two-wheeled motor vehicle, and the light distribution characteristic caused by this tilts. The present invention relates to a headlamp provided with a correcting mechanism.
[0002]
[Prior art]
As an example of the configuration of this type of conventional headlamp for a two-wheeled vehicle, for example, as shown in Japanese Patent Laid-Open No. 4-331678, a movable reflector is provided in a part of a reflecting mirror and is provided on a vehicle body. By driving the movable reflector with a drive unit such as a solenoid by the output from the tilt sensor or the like, the direction of some of the light rays is changed and the light distribution characteristics are corrected.
[0003]
[Problems to be solved by the invention]
However, in the headlight for a two-wheeled vehicle having the above-described conventional configuration, a relatively large dimension is necessary for a stroke when driving the movable reflector, and a movable mechanism is required because of a movable mechanism. As the weight of the head increases, a driving unit such as a solenoid is required to have a large driving force and a problem of inevitable cost increase for the entire headlamp.
[0004]
At the same time, it is necessary to divide the reflecting mirror into a fixed part and a movable reflector, which complicates the structure as described above, and creates a gap between the fixed part and the movable reflector. When looking into the screen, an aesthetic problem of causing the viewer to feel uncomfortable arises, and the solution of these points has been a problem.
[0005]
[Means for Solving the Problems]
The present invention has a configuration in which a movable part is provided as a specific means for solving the above-described conventional problems, and the light distribution characteristic is corrected by driving the movable part when the vehicle body is inclined. In the two-wheeled vehicle headlamp, the two-wheeled vehicle headlamp is provided with a main reflector, a right reflector, and a left reflector, and a fixed mirror and a fixed fixed hood. Provided as an accessory, shields the right reflecting portion and the left reflecting portion when the vehicle body is not inclined, and corresponds to the right reflecting portion and the left reflecting portion when the corresponding one is driven when the vehicle body is inclined. The problem is solved by providing a headlamp for a two-wheeled vehicle characterized by comprising a right movable hood portion and a left movable hood portion that give light to the side to be operated.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 to 4 shows a two-wheeled vehicle headlamp according to the present invention. The two-wheeled vehicle headlamp 1 also has a light distribution characteristic that occurs when the vehicle body is tilted such as when turning. The problem is solved by providing a movable part in the same way as the conventional example. In the following description, directions such as front and rear, left and right, and up and down are based on the state seen from the driver's seat.
[0007]
Here, in the present invention, the right movable hood portion 3a and the left movable hood portion 3b as movable portions are provided on the hood 3 which has been mainly intended to shield direct light from the light source 2 conventionally. The left and right movable hood portions 3a and 3b are pivotally supported by a fixed hood portion 3c by a shaft 3d so as to be rotatable within an appropriate range.
[0008]
An appropriate drive unit 4 such as a solenoid is provided at the opposite end of the shaft 3d. By driving the drive unit 4, the right movable hood unit 3a and the left movable hood as shown in FIG. The portion 3b (illustrated is an example of the right movable hood portion 3a) rotates around the shaft 3d, and most of the portion 3b is accommodated in the fixed hood portion 3c.
[0009]
The reflecting mirror 5 of the two-wheeled vehicle headlamp 1 is formed with a right reflecting portion 5a, a left reflecting portion 5b, and a main reflecting portion 5c. When the driving is not performed, the right movable hood portion 3a is a light source. 2 is shielded from reaching the right reflecting portion 5a, and the left movable hood portion 3b is similarly shielded from the left reflecting portion 5b.
[0010]
Therefore, when neither of the movable hood portions 3a, 3b is driven, the light from the light source 2 reaches only the main reflection portion 5c (see FIG. 1), and the reflected light from the main reflection portion 5c is a lens ( It is assumed that the light is diffused appropriately to form a passing light distribution when the vehicle body is not tilted.
[0011]
For example, when the right movable hood portion 3a is driven, the right movable hood portion 3a is accommodated in the fixed hood portion 3c (see FIG. 2), and the light from the light source 2 is reflected to the right reflecting portion 5a. In this embodiment, when the vehicle turns right and the vehicle body tilts to the right, the left movable hood portion 3b is driven and light reaches the left reflecting portion 5b. The reflecting portion 5b generates reflected light that goes in the right direction of the vehicle body.
[0012]
FIG. 3 shows the hood 3 as seen from above when the two-wheeled vehicle headlamp 1 is attached to the vehicle. The right movable hood portion 3a and the left movable hood portion 3b are shown in FIG. They are separated along a center line passing through the light source 2, and although not shown here, each is provided with a drive unit 4 such as a solenoid so that it can be driven individually.
[0013]
FIG. 4 shows the reflecting mirror 5 as viewed from the front front, and a right reflecting portion 3a and a left reflecting portion 3b are provided above the main reflecting portion 5c. In addition, since illustration shows in the state seen from the front front, the state seen from the driver's seat side is opposite.
[0014]
Next, operations and effects of the two-wheeled vehicle headlamp 1 of the present invention configured as described above will be described. FIG. 5 shows an example of light distribution characteristics when the vehicle body is tilted 40 ° to the left by turning left, and the right movable hood portion 3a is driven to generate reflected light from the right reflecting portion 5a. The passing light distribution H1 from the reflecting portion 5c is also inclined by 40 ° to the left.
[0015]
Accordingly, no light reaches the road surface on the left front which is about to enter, and no illumination is performed. Therefore, in the present invention, the reflected light from the right reflecting portion 5a is directed to the upper left side of the light distribution H1 in a state where the vehicle body does not tilt. The reflected light from the right reflecting portion 5a becomes a left-turning light distribution H2 that irradiates the left front road surface.
[0016]
FIG. 6 is an explanatory view showing an irradiation state of the road surface during actual traveling by the passing light distribution H1 and the left-turning light distribution H2 shown in FIG. 5, and the passing light distribution H1 is as described above. The left turn light distribution H2 irradiates the road surface on the left front side in a state of branching from the low light distribution H1. In this way, the road surface to be entered can be confirmed.
[0017]
Similarly, when turning right, the left movable hood portion 3b is driven to generate reflected light from the left reflecting portion 5a to obtain right turning light distribution (not shown). At this time, in the present invention, as shown in FIG. 7, when the vehicle body is upright, the outside is irradiated from the fan-shaped range D that extends 20 degrees upward and leftward from a point that is substantially in front of the vehicle. Further, it is more preferable that the portion indicated by the range E is irradiated so as not to cause dazzling light on the oncoming vehicle.
[0018]
Here, referring again to FIG. 1 and FIG. 2, when considering the operation and effect of the configuration of the present invention, the reflection of the comparative example is relatively large although the conventional example is partial. In contrast to the movement of the mirror, in the present invention, a part of the hood, that is, the movable hood portions 3a and 3b are moved, so that the mass of the symmetrical object to be moved is remarkably small. Also, a small output can be used.
[0019]
In addition, in the configuration in which a part of the reflecting mirror of the conventional example is movable, a considerable amount of stroke is required for the drive unit in order to obtain a desired light distribution characteristic. The stroke required for the drive unit 4 for the movement of the movable hoods 3a and 3b is remarkably small. In this respect, the drive unit 4 can be downsized.
[0020]
Further, in the configuration of the conventional example, since the light distribution for turning is obtained with the (part of) the reflecting mirror to be moved, the amount of movement of the reflecting mirror is required to be accurate. According to the above, since both the movable hood portions 3a and 3b to which the movement is performed may be performed whether or not to shield both the reflection portions 5a and 5b in which the light distribution for turning is set in advance. The accuracy is not required so much, and the configuration is simplified.
[0021]
FIG. 8 shows another embodiment of the present invention. In the previous embodiment, the right reflecting surface 5a and the left reflecting surface 5b are provided above the main reflecting surface 5c. The present invention is not limited to this, and as shown in the drawing, the right reflecting surface 5a and the left reflecting surface 5b may be provided separately on the left and right of the main reflecting surface 5c. The shapes of the portions 3a and 3b and the fixed hood portion 3c can be changed appropriately corresponding to the reflection surface.
[0022]
FIG. 9 shows still another embodiment of the present invention. In the above embodiment, both movable hood portions 3a and 3b are driven by a drive portion 4 that moves only in two positions, such as a solenoid. However, the present invention is not limited to this. For example, the drive unit 6 may include a stepping motor 6a and a reduction gear 6b.
[0023]
In this case, for example, if the right movable hood portion 3a (or the left movable hood portion 3b) is gradually moved according to the degree of inclination generated in the vehicle body, the right reflective surface 5a (or the left reflective surface) The area where the light reaches 5b) also gradually increases. Therefore, a light distribution for turning corresponding to a curved path having a relatively large turning radius is allocated to a portion where the light reaches at the beginning of the right reflecting surface 5a (the left reflecting surface 5b). If it corresponds to a curved road, the light distribution for turning also corresponds to the degree of inclination of the vehicle body, and it can be made more suitable for traveling of an actual two-wheeled vehicle.
[0024]
【The invention's effect】
As described above, according to the present invention, the main reflecting portion, the right reflecting portion, and the left reflecting portion are provided and fixed, and the fixed reflecting hood portion is attached to the vehicle body. The right and left reflecting portions are shielded when no inclination occurs, and the right movable portion that inclines the vehicle body and applies light to the corresponding sides of the right and left reflecting portions when the corresponding one is driven. By driving the headlamp for a two-wheeled vehicle composed of a hood part and a left movable hood part, by driving the right movable hood part and the left movable hood part, which are parts that are much lighter and move less It is assumed that the light distribution for turning can be obtained, and that the drive unit can be miniaturized, and that the two movable hood units are driven so that the accuracy is not so much required. It is possible to simplify the structure of the lighting. In which it exhibits an extremely excellent effect down.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of an embodiment of a headlight for a motorcycle according to the present invention.
FIG. 2 is an explanatory view showing a state in which a movable hood portion of the same embodiment is driven.
FIG. 3 is a top view of the main part of the same embodiment.
FIG. 4 is a front view of a main part of the same embodiment.
FIG. 5 is a graph showing a formation state of a turning light distribution by a two-wheeled vehicle headlamp according to the present invention.
FIG. 6 is an explanatory view showing the irradiation state of the road surface of the same light distribution for turning.
FIG. 7 is a graph showing a range in which a light distribution for turning is formed according to the present invention.
FIG. 8 is a front view showing a main part of another embodiment of a headlight for a motorcycle according to the present invention.
FIG. 9 is an explanatory view showing a main part of still another embodiment of the headlamp for a motorcycle according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Motorcycle headlamp 2 ... Light source 3 ... Hood 3a ... Right movable hood part 3b ... Left movable hood part 3c ... Fixed hood part 3d ... Shafts 4, 6 ... Drive part 5 ... ... Reflector 5a ...... Right reflector 5b ...... Left reflector 5c ... Main reflector

Claims (3)

In a two-wheeled vehicle headlamp that is provided with a movable portion and is configured to correct the light distribution characteristics by driving the movable portion when the vehicle body is inclined, the two-wheeled vehicle headlamp includes a main reflection. And a right reflecting portion and a left reflecting portion are provided, and are attached to a fixed fixing hood portion, and when the vehicle body is not inclined, the right reflecting portion and the left reflecting portion are provided. A right movable hood part and a left movable hood part that provide light to the corresponding side of the right reflective part and the left reflective part when the corresponding one is driven by tilting the vehicle body and driving the corresponding one. Two-wheeled vehicle headlight characterized by 2. The two-wheeled vehicle headlamp according to claim 1, wherein the right movable hood portion and the left movable hood portion are driven as a driving amount corresponding to a degree of inclination of the vehicle body. The light distribution by the right reflecting portion and the left reflecting portion irradiates the outside of the fan-shaped range extending 20 degrees upward and leftward from a point that is substantially the front of the vehicle when the vehicle body is upright. The headlight for a two-wheeled vehicle according to claim 1 or 2, characterized by the above-mentioned.

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