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Head lamp for bicycle

A technology for bicycles and headlights, used in bicycle accessories, motor vehicles, road vehicles, etc.

Inactive Publication Date: 2003-10-22
CATEYE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the light other than the light whose traveling route is changed by the concave reflector, that is, the light emitted from the LED, travels straight ahead without changing the traveling route.

Method used

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  • Head lamp for bicycle
  • Head lamp for bicycle
  • Head lamp for bicycle

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Embodiment Construction

[0040] Next, embodiments of the present invention will be described with reference to the drawings.

[0041] exist figure 1Among them, three LEDs 1, 2, and 3 are arranged adjacently as light sources, and condenser lenses 11, 12, and 13 are provided in front of each LED. For the LED, a wide-angle emission type with a half width of 50° is used. In addition, the condensing lens can be a convex lens and a Fresnel lens which is a continuum can be removed by sequentially turning the thickness of the convex lens into a concentric circle. The light emitted from the wide-angle beam type LED is irradiated on the condenser lens, and the light is condensed to a predetermined level and emitted. By arranging one condensing lens for each LED, the lights emitted from the condensing lenses 11, 12, and 13 are converged into light beams close to parallel rays. Usually, there is a problem with the light distribution characteristics of the irradiated surface S and the like 10 m ahead, so a pre...

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PUM

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Abstract

There is provided a bicycle head lamp employing an LED having high energy efficiency to be capable of provide sufficiently increased illuminance at a center position a predetermined distance ahead and also satisfying a predetermined distribution of light. A head lamp 10 attached to a bicycle includes a casing 31, a plurality of adjacently arranged LEDs 1, 2, 3, 4, 5 and a lens 11, 12, 13, 14, 15 arranged closer to an opening for each LED.

Description

technical field [0001] The present invention relates to a headlight for bicycles, more specifically to a headlight for bicycles with light emitting diodes as light sources. Background technique [0002] Conventionally, incandescent bulbs with tungsten filaments etc. enclosed in them have been often used as light sources for bicycle headlights. A battery is used as the power source, and the electric current supplied from the battery makes the incandescent bulb generate heat and emit light. Such incandescent bulbs can be easily mounted on bicycles, so they are widely used. [0003] However, incandescent bulbs generate heat, so the disadvantages are a high proportion of thermal energy not used as a light source and short battery life. In addition, although a large-capacity battery can be used to ensure a long enough life, the battery capacity can only be increased within a certain limit due to the increase in weight. Furthermore, there is a problem that the life of the incan...

Claims

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Application Information

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IPC IPC(8): B62J6/02F21S8/10F21V19/00F21W101/10F21W107/13F21Y101/02
CPCB62J6/02B62J6/029
Inventor 本贤
Owner CATEYE