JPH11353902A - Bicycle headlight reflector having irregularity on its surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bicycle headlight reflector apparently impressing the presence of the bicycle to motor vehicle drivers even in the time of non-lighting structurally caused when stopping or forgetting to turn on, when the bicycle is running toward motor vehicles at night. SOLUTION: A part of the reflective surface of a concave mirror 1 is continuously provided with irregularities 2 of minute right triangular pyramids in which three mirror planes are at right angles to each other, and cross lines of the respective mirror planes are orthogonal at a point. The incident light, at an arbitrary angle, on each irregularity 2 of the right triangular pyramid in which the three mirror planes are at right angles to each other and the cross lines of the respective mirror planes cross at a point is turned by 180 deg. relative to the incident angle according to the optical reflection law, to retrace its path as the reflected light. That is, even when the bicycle lamp is not turned on, the light from the motor vehicle headlamp is turned over by the right triangular pyramid irregularities 2 on the mirror surface, to be returned toward the motor vehicle driver as the reflected light, resulting in the same state that the bicycle lamp emits light in view of the motor vehicle driver. Thus, the motor vehicle driver can clearly check the presence of the bicycle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector for a bicycle headlight which makes it possible for a driver of a car running on the opposite side to clearly recognize the presence of the bicycle even when the headlight of the bicycle is not in a spot. It is about.

[0002]

2. Description of the Related Art Conventionally, in the case where a bicycle runs at night against a car at night, due to the structure of the bicycle, when the bicycle is temporarily stopped at a traffic light or when it is forgotten to be turned on, the bicycle is in a non-lighting state and runs oppositely. It was difficult for the driver of the car to recognize the presence of the bicycle, which was dangerous.

[0003]

SUMMARY OF THE INVENTION The present invention clarifies the existence of a bicycle to the driver of a car running at night in a non-lighting state caused by a structural stop of the bicycle, a temporary stop or forgetting to turn on a headlight. It is intended to be developed with the aim of reducing the danger.

[0004]

Means for Solving the Problems A concave triangular pyramid-shaped unevenness 2 having a mirror surface is provided on a part of the surface of the concave mirror 1. A reflector for a bicycle headlight comprising the above.

[0005]

The three mirror surfaces form an angle of 90 degrees with each other, and the light incident at an arbitrary angle on the right-angled triangular pyramid irregularities 2 where the intersection lines of the mirror surfaces intersect at one point obeys the law of light reflection. The reflected light rotates 180 degrees with respect to the incident angle and returns in the direction in which it came. In other words, even if the bicycle headlight is not at a point, the light of the car headlight is reflected light that is reversed by the mirror-surfaced right-angled triangular pyramid unevenness 2 and returns toward the driver of the car. As a result, the headlights of the bicycle are illuminated as if seen by the driver of the car, and the driver of the car can clearly confirm the presence of the bicycle. Also, even when the bicycle headlights are on,
The light of the car headlight is reflected and inverted by the mirror-surfaced right-angled triangular pyramid unevenness 2 and returns to the direction of the car driver. Therefore, the light of the bicycle headlight itself and the reflected light of the car headlight are both reflected. The light will be received by the car driver.

[0006]

Embodiments of the present invention will be described below. (A) The bulb 3 is provided at the center of the concave mirror 1 or a parabolic mirror belonging to the class of the concave mirror 1. (B) Small, mirror-finished right-angled triangular pyramid-shaped irregularities 2 are continuously provided so as to surround the bulb 3 in a range of about half of the surface area of the concave mirror 1. The configuration is as described above. The light emitted from the light bulb 3 is condensed by the parabolic reflector 4 of the concave mirror 1 and irradiates the front, and is scattered by the continuous small, mirror-surfaced right-angled triangular pyramid-shaped irregularities 2 to become scattered light spreading forward. . The light of the headlights of the car running opposite to the bicycle is 180 deg.
It turns light and returns to the direction of the car driver.

[0007]

Therefore, the driver of the car running opposite can always clearly recognize the presence of the bicycle regardless of whether the headlight of the bicycle is on or not, and safety can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory side sectional view of the present invention.

FIG. 2 is an explanatory front view of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concave mirror 2 Mirror-like right-angled triangular pyramid unevenness 3 Light bulb 4 Parabolic reflector

Claims (1)

[Claims] 1. A reflector for a bicycle headlight having a concave mirror (1) having a right-angled triangular pyramid-shaped unevenness (2) on a part of the surface.