JP2818009B2 - Vehicle headlamp device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a headlamp device used for a vehicle such as a motorcycle.

[Prior art] In road sports type motorcycles,
It is known that a cowling is provided from the upper part of the front fork to the periphery of the engine, and a pair of headlamps are arranged on the front of the cowling side by side.

This conventional headlamp uses a so-called parabolic mirror, whose reflector is curved in a parabolic cross section,
The diameter of the reflector is inevitably increased, and the shape of the front surface of the cowling is sometimes restricted by the presence of the headlamp.

For this reason, recently, there has been known a motorcycle employing a so-called projector lamp having a reflecting mirror having an elliptical cross section instead of the conventional headlamp. In this projector lamp, a halogen bulb is arranged at a first focal point of a reflecting mirror having an elliptical cross section with an open front end, and a second focal point where light reflected by the reflecting mirror is collected in front of the reflecting mirror. A convex lens is arranged so that the focal points may be matched, and the light from the halogen bulb is projected forward through the convex lens.

The projector lamp having such a configuration has a short focal length because the cross section of the reflecting mirror has an elliptical shape, so that the reflecting mirror can be used up to a deep angle. Therefore, even if the diameter of the reflecting mirror is small, much of the light from the halogen bulb can be guided to the convex lens side. It has the advantage that it can be tilted.

[Problems to be Solved by the Invention] However, since this projector lamp has two focal points on the optical axis of the reflecting mirror, the total length from the convex lens to the reflecting mirror becomes longer. For this reason, in a motorcycle equipped with a cowling, the front surface of the cowling also needs to protrude greatly forward in accordance with the projection of the projector lamp,
Cowling design constraints are increased.

Further, in a so-called naked type motorcycle without a cowling, the convex lens of the projector lamp protrudes largely toward the front of the front fork, so that the lamp itself becomes strangely conspicuous and poses a problem in appearance.

The present invention has been made in view of such circumstances, and in using a projector lamp as a headlamp, the overall length of the projector lamp can be reduced as much as possible, and the amount of protrusion of the convex lens forward of the vehicle body is suppressed. It is another object of the present invention to provide a headlamp device for a vehicle in which the degree of freedom in arranging a projector lamp at the front end of the vehicle body is increased.

Means for Solving the Problems To achieve the above object, a vehicle headlamp device according to the present invention has a vehicle body; and a headlamp arranged at a front end of the vehicle body.

The headlamp includes a reflector having an elliptical cross section with an open front end, a light source disposed at a first focal point inside the reflector, and a front of a second focal point where light reflected by the reflector is collected. A projector lens including a convex lens disposed in the projector lens. The projector lamp has a lens center line connecting the center of the convex lens and a second focal point arranged along the front-rear direction of the vehicle body, and The center line of the reflecting mirror connecting the first focal point and the second focal point of the mirror is arranged to be inclined so as to intersect with the lens center line.

[Operation] According to this configuration, the total length from the convex lens to the reflecting mirror is smaller than that of a conventional lamp in which the reflecting mirror center line and the lens center line are located on the same straight line with the inclination of the reflecting mirror center line. Be shorter. Therefore, the amount of protrusion of the convex lens toward the front of the vehicle body can be reduced, and the degree of freedom in arranging the projector lamp at the front end of the vehicle body increases.

Example A first example of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 2 shows a motorcycle equipped with a projector lamp, and reference numeral 1 in the figure denotes a frame constituting a vehicle body. A telescopic front fork 3 is pivotally supported on a steering head pipe 2 located at the front end of the frame 1.

The front fork 3 includes a pair of left and right fork tubes 4. The fork tube 4 includes an inner tube 5a and an outer tube 5b slidably mounted in a lower portion of the inner tube 5a in the axial direction. Are connected via A steering shaft 7 is provided between the brackets 6, and the steering shaft 7 passes through the steering head pipe 2.

For this reason, the front fork 3 is
The inner tube 5b is rotatably supported by the steering head pipe 2 through the inner tube 5b.

The fork tube 4 has a front wheel 8 at the lower end.
Is supported.

A portion from the front of the steering head pipe 2 to the periphery of the engine 9 is covered with a cowling 10.
An opening 11 for projecting light is formed on the front surface of the cowling 10, and the opening 11 is covered with a transparent front lens 11a. Then, in the opening 11, a pair of head lamps 12 are arranged side by side across the center line X ₁ -X ₁ in the longitudinal direction the vehicle body. The headlamp 12 uses the projector lamp 15 according to the present invention. Hereinafter, the details of the projector lamp 15 will be described with reference to FIG.

That is, the projector lamp 15 includes a lamp body 16 having a cylindrical shape. The lamp body 16 includes a reflector 17 having an elliptical cross section with an open front end, and a cylindrical lamp body 18 connected to an opening of the front end of the reflector 17. The lamp body 16 is horizontally arranged along the front-rear direction between the left and right inner tubes 5a of the front fork 3, and is fixed to the frame 1 or the cowling 10 in this embodiment.

The reflecting mirror 17 has a vertical cross section formed into an elliptical shape, but as a whole, it is not a shape obtained by simply rotating the ellipse, but a compound ellipse obtained by gradually changing the elliptical cross section in the horizontal direction. No.

The reflecting mirror 17 has first and second two focal points f ₁ and f ₂ on one optical axis L passing through the center thereof. This first focal point f ₁ is located inside the reflecting mirror 17, and the second focal point f ₂ is
Is located inside.

At the rear end of the reflector 17, a halogen bulb 19 as a light source is provided.
Is installed, the filament of this halogen bulb 19
20 is positioned in the first focal point f _1.

A convex lens 21 is attached to a front end opening of the lamp body 18. In this embodiment, the focal point f _{3 of the} convex lens 21 is the second focal point where the light reflected by the reflecting mirror 17 is collected.
f _2, and the second focal point f ₂
It is configured to project the light that gathers at the front.

Meanwhile, in the projector lamp 15 having such a configuration, the lens center line A ₁ connecting the center and the second focus f ₂ of the convex lens 21 are arranged along the longitudinal direction of the vehicle body, the The lens center line A ₁ is the center line X ₁ − of the vehicle body.
It forms a parallel to the X _1. On the other hand, the center line A _{2 of the} reflecting mirror which connects the first focal point f ₁ and the second focal point f ₂ of the reflecting mirror 17 and is coaxial with the optical axis L is positioned with respect to the lens center line A ₁ of the vehicle body. are inclined in the lateral direction, these reflectors center line a ₂ and the lens center line a ₁ is crossed in the second focus f _2.

In the case of this embodiment, the left and right projector lamps
Reflector center line A ₂ of 15, the are inclined from the second focal point f ₂ in the direction approaching to the center line X ₁ -X ₁ of the vehicle body in accordance with the process proceeds backwards, inclination direction of the reflecting mirror center line A ₂ is , Between the left and right projector lamps 15 are opposite to each other.

Thus, with the inclination of the reflection mirror center line A _2, the lamp body 16 has a shape which is bent in a direction reflecting mirror 17 connected to the rear end are close to each other, the reflecting mirror 17 of the front fork 4 Left and right inner tubes 5a
I'm in the middle.

The lamp body 18 of each projector lamp 15 is
It is located on the rotation locus P of the inner tube 5a. For this reason, the portion of the lamp body 18 facing the vehicle body side includes
A notch 22 into which the inner tube 5a enters is formed.

Even if the inner tube 5a enters the notch 22, the main light flux which is reflected by the reflecting mirror 17 and directed to the convex lens 21 is not blocked.

According to the first embodiment having such a configuration, the center line A ₂ of the reflecting mirror of each projector lamp 15 is moved rearward from the second focal point f _{2 with} respect to the center line A ₁ of the convex lens 17 as the center line of the vehicle body. Since the lamp bodies 16 of the left and right projector lamps 15 are inclined in a direction approaching X ₁ -X ₁ , the rear-end reflecting mirrors 17 are bent in a direction in which the reflecting mirrors 17 approach each other.

For this reason, the total length from the convex lens 21 to the rear end of the reflecting mirror 17 is shorter than that of a conventional projector lamp in which the reflecting mirror center line A2 and the lens center line A1 are located on the same straight line.

At the same time, with the inclination of the reflector center line A2, the reflector
17 moves closer to the vehicle body center line X1-X1 and deviates from the rotation locus P of the inner tube 5a, so that interference between the front fork 3 and the reflecting mirror 17 can be avoided, and the projector lamp 15 itself is moved to the steering head. It can be arranged close to the pipe 2.

Therefore, in addition to the shortening of the overall length of the projector lamp 15, the amount of projection of the projector lamp 15 in the forward direction can be reduced, and the degree of freedom in incorporating the projector lamp 15 into the frame 1 or the cowling 10 increases. .

In addition, since the amount of projection of the projector lamp 15 forward is reduced, the front surface of the cowling 10 can be prevented from projecting forward, and the cowling 10 can be formed compact accordingly.

In addition, in this embodiment, since the notch 22 into which the inner tube 5a enters is provided in the lamp body 18, the turning angle of the front fork 3 can be increased by the depth of the notch 22, and the inner tube 5a Rotation locus P
The rotation angle of the front fork 3 can be sufficiently ensured despite the lamp body 18 being located above.

The present invention is not limited to the first embodiment, and FIG. 4 shows a second embodiment of the present invention.

The second embodiment differs from the first embodiment in that the reflecting mirror 17 of the projector lamp 15 is arranged forward of the front fork 3 between the inner tubes 5a. The detailed configuration is the same as in the first embodiment.

Also in this configuration, the reflecting mirror 17 is inclined in a direction approaching the vehicle body center line X ₁ -X ₁ as the reflecting mirror 17 moves backward, so that the reflecting mirror center line A ₂ is coaxial with the lens center line A _1. In comparison, the portion of the reflector 17 facing the vehicle body side is the center line X _{1 of the} vehicle body.
−X ₁ will be entered.

Thus, the rotation angle of the front fork 3, if the same as assumed when the reflector center line A ₂ forms the lens center line A ₁ and coaxially be shifted lamp body 16 to the steering head pipe 2 side Yes, projector lamp 15
Can be reduced to a small extent.

FIG. 5 shows a third embodiment of the present invention.

In the third embodiment, the left and right projector lamps 15 are
Are those arranged in front of the inner tube 5a of each front fork 3, a first focus f ₁ of the reflecting mirror 17 second
Reflector center line A ₂ connecting the focus f ₂ is inclined in a direction away from the respective body center line X ₁ -X ₁ in accordance with the process proceeds from the second focal point f ₂ in the rear.

Therefore, the inclination of the reflection mirror center line A _2, the lamp body 18, the intermediate portion is bent outward in the width direction of the vehicle body, the inner tube 5a of the inside of the reflector 17 the front fork 4 Rotates.

According to the third embodiment, the reflecting mirror 17 is inclined in a direction away from the vehicle center line X ₁ -X _{1 as} it goes backward, so that the surface of the reflecting mirror 17 facing the inner tube 5a is the width of the vehicle body. As a result, the front fork 3 and the reflecting mirror 17 can be prevented from interfering with each other. For this reason, assuming that the rotation angle of the front fork 3 is the same as that of the related art, the lamp body 16 can be located rearward by the amount of the above-mentioned displacement, and the amount of projection of the projector lamp 15 forward can be reduced. FIG. 6 shows a fourth embodiment of the present invention.

In the fourth embodiment, the left and right projector lamps 15 are supported by the front fork 3 and are rotated integrally with the front fork 3. The detailed configuration is the same as in the first embodiment.

In the case of this fourth embodiment, since the reflection mirror 17 is inclined toward the vehicle body center line X ₁ -X ₁ in accordance with the process proceeds to the rear, the reflecting mirror 17 is enters between the inner tube 5a.

For this reason, assuming that the arrangement interval between the left and right projector lamps 15 is the same as in the past, the reflecting mirror 17 and the inner tube
Interference with 5a can be avoided, and the projector lamp 15 can be arranged closer to the steering head pipe 2 than in the related art.

In each of the above embodiments, a halogen lamp is used as a light source. However, the present invention is not limited to this, and a discharge lamp such as a metal halide lamp may be used instead of the halogen lamp.

[Effect of the Invention] According to the present invention described in detail above, the total length from the convex lens to the reflecting mirror is shorter than that of a conventional lamp in which the reflecting mirror center line and the lens center line are located on the same straight line. Therefore, the amount of protrusion of the convex lens toward the front of the vehicle body can be reduced, and there is an advantage that the degree of freedom in arranging the projector lamp at the front end of the vehicle body increases.

[Brief description of the drawings]

1 to 3 show a first embodiment of the present invention. FIG. 1 is a sectional view showing the relationship between a projector lamp and a front fork. FIG. 2 is a side view of a motorcycle around a front. FIG. 3 is a view taken in the direction of the line III in FIG. 2, FIG. 4 is a sectional view showing a second embodiment of the present invention, and FIG. 5 is a view showing a third embodiment of the present invention. FIG. 6 is a sectional view showing a fourth embodiment of the present invention. 1 ... body (frame), 12 ... headlamp, 15 ...
Projector lamp, 17 reflector, 19 light source (halogen bulb), 21 convex lens, A ₁ lens center line, A ₂
…… the center line of the reflector.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-69401 (JP, A) JP-A-2-177206 (JP, A) JP-A-2-1754747 (JP, A) 39401 (JP, U) Japanese Utility Model Hei 1-130203 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F21M 3/05 B B60Q 1/02 B62J 6/02

Claims (1)

(57) [Claims] A headlamp disposed at a front end of the vehicle body, wherein the headlamp has an elliptical cross-section with an open front end, and a first mirror inside the reflection mirror. And a convex lens disposed in front of a second focal point where the light reflected by the reflecting mirror is gathered. The projector lamp comprises:
A lens center line connecting the focal point is arranged along the front-back direction of the vehicle body, and a reflecting mirror center line connecting the first and second focal points of the reflecting mirror is positioned with respect to the lens center line. A headlamp device for a vehicle, wherein the headlamp device is disposed so as to intersect.