CN2293709Y

CN2293709Y - Low-power lower-light level illuminating lamp

Info

Publication number: CN2293709Y
Application number: CN 96216833
Authority: CN
Inventors: 徐长征
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-01
Filing date: 1996-07-01
Publication date: 1998-10-07
Anticipated expiration: 2006-07-01

Abstract

The utility model relates to a low-power lower-light illuminating lamp, comprising a step-down transformer and a low-power lamp. The utility model is characterized in that the step-down transformer is formed by a capacitor branch which is connected with the low-power lamp in series and is connected with an ac power supply. The utility model has the advantages that compared with using a variable depressurizing device to depressurize, the utility model uses the capacitor branch to depressurize and has the advantages of the 1/25 of the weight, the 1/10 of the size, and the 1/4 of the price; thus the utility model is not only used for constant lighting lamps at night, but also can replace indicating lamps whose power is supplied by step-down transformers in a majority of electromechanical devices.

Description

Low-power low-light illuminating lamp

The utility model relates to a kind of lavatory at night, corridor etc. of being suitable for and locates the low-power low-light illuminating lamp of usefulness all night.

People wish in the corridor in daily life, lavatory, corridor etc. locate to be provided with normal bright lamp at night, wish again this normal bright lamp power consumption is reduced to minimum too big because the brightness of this lamp does not need.Be the incandescent lamp bulb of power supply with civil power～220V directly at present, lowest power is 5W, if it is excessive that it is still shown power as above-mentioned illuminating lamp.

The purpose of this utility model is: overcome the deficiency of prior art, the low-power low-light that uses after the step-down of a kind of small size, low cost illuminating lamp is provided.

The utility model is achieved in that low-power low-light illuminating lamp, comprises reducing transformer and low-power bulb, it is characterized in that: reducing transformer is realized that by a capacitive branch this capacitive branch and low-power bulb are in series, the incoming transport power supply.

On above-mentioned basic scheme basis, the temperature-sensitive element of can connecting at pressure cell of low-power bulb two ends parallel connection or with low-power bulb.

The utility model advantage is:

1, utilize electric capacity in alternating current circuit capacitive reactance Xc=1/ ω C characteristic to the step-down of mains supply 220V alternating voltage after for low-power bulb power supply, make it and can below 3W, work, the brightness that so not only can satisfy the required low-light illumination in specific occasion requires, but also can reach the effect of saving power consumption.

2, utilizing capacitive branch step-down and use change to fall the device step-down compares, weight is the latter's 1/25, volume is 1/10, price is 1/4, so the utility model not only can be used for normal bright lamp at night, in also alternative present most of electromechanical equipments with the indicating lamp structure of step-down transformer power supply.

Fig. 1 is the circuit theory diagrams of the utility model embodiment 1.

Fig. 2 is the circuit theory diagrams of the utility model embodiment 2.

Below in conjunction with drawings and Examples the utility model is done a detailed description:

In to actual use the of the present utility model, when the incoming transport power supply, can produce what is called " shake " phenomenon of switch-on and-off owing to electrically contact, remaining voltage and supply voltage instantaneous value homophase on the electric capacity that this may make with bulb is connected, the two is superimposed as very that high voltage (limit situation is two times of crest voltages) is added on the bulb, and this is with the life-span of grievous injury bulb.For fear of this situation, need in circuit, to add protecting component bulb is protected.

As shown in Figure 1, be at bulb D among the embodiment 1 ₁A two ends last piezo-resistance V in parallel, work as D ₁When too high voltages appears in two ends, then piezo-resistance V conducting, play the divided current effect.Miniature bulb D in this example ₁Power less than 0.7W.

As shown in Figure 2, be at bulb D among the embodiment 2 ₂An end last thermistor t that connects, when decompression capacitor C occurring ₂Superpose when too high with the supply voltage instant value, the big electric current that produces in the circuit can make thermistor t present big resistance, play the dividing potential drop protective effect.Miniature bulb D in this example ₂Power greater than 0.7W.

Claims

1, low-power low-light illuminating lamp comprises reducing transformer and low-power bulb, it is characterized in that: reducing transformer is realized that by a capacitive branch this capacitive branch and low-power bulb are in series, the incoming transport power supply.

2, illuminating lamp according to claim 1 is characterized in that: pressure cell in parallel at the low-power bulb two ends.

3, illuminating lamp according to claim 1 is characterized in that: the temperature-sensitive element of connecting with low-power bulb.