JPH01127467A - Head lamp for bicycle - Google Patents

Abstract

PURPOSE: To increase illuminance and to reduce an electricity generating load and to freely control color temperature by using a fluorescent lamp for a headlamp in a bicycle. CONSTITUTION: A fluorescent lamp 1 with a base, which is a hot cathode fluorescent lamp, contains gaseous mercury and rare gas in addition to a filament serving as an electrode. In lighting the lamp 1, the filament is lighted without preheating, and a lighting circuit 7 and the lamp 1 are connected together. A reflection plate 4 reflecting light of the lamp 1 is arranged in the position surrounded by a case 6 made of resin/metal and a transparent cover 5, and in the case 6, a metal fitting 8 mounted to a bicycle is arranged and connected to the earth. A bicycle generator 9 is connected to one power source unit input end of the lighting circuit 7, while the other power source input end is connected to the mounting metal fitting. For lighting the lamp 1 by means of the generator, a conversion circuit to direct current is provided in the lighting circuit 7 as alternate current is supplied from the power source.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bicycle headlamp, and in particular to a bicycle headlamp, which uses a small fluorescent lamp instead of an unused miniature light bulb to produce a high-brightness and beautiful headlamp. This invention relates to a bicycle headlamp suitable for emitting light.

As described, 3-6W as a bicycle headlamp.
It used a small miniature light bulb to light the light using electricity generated by a bicycle generator.

[Problem that the invention seeks to solve]

In the above conventional technology, electricity generated by a bicycle generator is used to light a small light bulb at about 3 to 6 W, so the amount of electricity is not enough at normal speeds, so it is very dark, and the color temperature of the light bulb is 3000 degrees. The problem was that the appearance was poor due to the extremely dark color of the light source, and the color could not be controlled freely.

Furthermore, due to the lack of electricity, it was not possible to reduce the load on one generator.

The purpose of the present invention is to make the lamp highly efficient.

To provide a bicycle headlamp that is bright, reduces generator load, and allows free control of color temperature.

[Means for solving problems]

The above object is achieved by using a fluorescent lamp in a bicycle headlamp.

Fluorescent lamps are about 5 to 6 times more efficient than regular light bulbs, so they require 115 to 176 times more power to achieve the same brightness. Therefore, with the same power consumption, it can be sufficiently bright, and with lower power consumption, it is possible to reduce the load on one generator.

Furthermore, since it is a fluorescent lamp, it is possible to supply a lamp with any color temperature by changing the phosphor.

In particular, if efficiency is important, a three-wavelength type rare earth phosphor is preferable.

In addition, a lighting circuit is required to light a fluorescent lamp, but by using a two-stone bush-pull oscillation circuit, the power supply waveform can be made almost a sine wave.
Can be used for both AC and DC.

Other oscillation methods are also possible, such as a stone separately excited method or a stone blocking method.

[Effect]

Fluorescent lamps act as a light source in the same way as traditional miniature light bulbs,
A circuit is required to turn it on. The lighting circuit is a high-frequency inverter circuit, and if you want to use electricity generated by a bicycle generator, you can just add a converter (AC to DC). In addition, dry batteries and rechargeable dry batteries can be directly connected to the inverter circuit.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a connection diagram of a light source part of a bicycle headlamp. In order to represent the compactness of the fluorescent lamp, a lighting circuit 2 that generates high frequency waves is connected to the U-shaped fluorescent lamp 1, and the power supply section 3 is a bicycle generator, a dry battery, or a rechargeable battery.

FIG. 2 shows a configuration diagram of a bicycle headlamp. The fluorescent lamp 1 with a cap is a hot cathode fluorescent lamp, and contains mercury and a rare gas in addition to a filament as an electrode. There are two lighting methods: a method in which the filament is preheated before lighting, and a method in which the filament is lit without preheating at all.In this example, the latter method was used, and the lighting circuit (electronic circuit) 7 and lamp l are connected.

Furthermore, there is a reflector plate 4 that reflects the light from the lamp surrounded by a case 6 made of resin or metal and a transparent cover 5, and the case 6 has a metal fitting 8 for attaching it to the bicycle, and is connected to the earth (GND). Ru.

Further, the bicycle generator 9 is connected to a power source input end of the lighting circuit 7, and the other power source input end is connected to a mounting bracket.

In this embodiment, a generator is used as the power source, but any device that generates electricity, such as a dry battery or a rechargeable battery, may be used.

Furthermore, when lighting with a generator, the power source is alternating current, so it goes without saying that a direct current converter (converter) is included in the lighting circuit.

〔Effect of the invention〕

According to the invention, by using a fluorescent lamp in a bicycle headlamp.

(1) It is 5 to 6 times brighter than the conventional miniature light bulb type.

(2) By reducing the brightness a little and reducing the load on the generator, you can pedal lighter.

(3) It is beautiful because you can choose from a variety of light source colors.

In experiments, it was found that the use of white, three-wavelength type phosphors of 4,500 to 100 OOK improves appearance and brightness.

(4) If a battery is used as a power source, the battery life will be extended by 5 to 6 times with the conventional number of brightness.

[Brief explanation of the drawing]

FIG. 1 shows a connection diagram of a light source section of a bicycle headlamp according to the present invention, and FIG. 2 shows a configuration diagram when the bicycle headlamp is incorporated as a headlamp. DESCRIPTION OF SYMBOLS 1... Fluorescent lamp, 2... Lighting circuit, 3... Power supply part, 4... Reflector, 5... Transparent cover, 6... Case, 7... Electronic circuit, 8... ...Mounting bracket, 9...
Bicycle generator.

Claims (1)

[Scope of Claims] 1. A bicycle headlamp characterized in that a small fluorescent lamp is used in the bicycle headlamp. 2. The bicycle headlamp according to item 1, which has a built-in or external circuit for lighting the fluorescent lamp. 3. The bicycle headlamp according to item 1, wherein the lighting power source for the fluorescent lamp is a generator. 4. The bicycle headlamp according to item 1, wherein the lighting power source for the fluorescent lamp is a dry battery or a rechargeable battery.