CN201126135Y - Rechargeable AC and DC dual-purpose light bulb - Google Patents

Abstract

The utility model relates to a charging type alternating-current/direct-current bulb, including a transparent housing, a lamp holder mounted at the upper end of the housing, a luminous body mounted in the housing and a working circuit, wherein, the working circuit is also connected with a rechargeable battery, a charging circuit and an AC-DC energy supply automatic switching circuit. The utility model can be widely applied as alternating current supplied common energy conserving lamp and incandescent lamp, and realizes the direct current standby lighting.

Description

Rechargeable AC and DC dual-purpose light bulb

technical field

The utility model relates to a rechargeable AC-DC dual-purpose bulb, in particular to an LED rechargeable AC-DC dual-purpose bulb for lighting.

Background technique

The LED lighting bulbs in the prior art can only use alternating current as a power source. When the AC power supply is cut off, only emergency lights can be used for lighting. But ordinary families generally do not buy emergency lights for backup, so they can only use candles instead. Due to the development of modern technology, more and more electrical appliances are needed, and the energy crisis has become a common problem all over the world. There are often insufficient power supplies in various places, and the frequency of power outages during peak periods of power consumption is also increasing. People's life brings many inconveniences.

Contents of the utility model

The purpose of the utility model is to overcome the above defects and provide a rechargeable AC and DC dual-purpose light bulb.

In order to achieve the above object, the utility model

Due to the adoption of the above scheme, the utility model can be widely used like ordinary energy-saving lamps and incandescent lamps powered by AC, and realizes DC standby lighting. Simultaneously, the lamp body of the utility model is small and exquisite, highly efficient and energy-saving, and has a long service life.

Description of drawings

Fig. 1 is the exploded view of structure of the present utility model;

Fig. 2 is the circuit diagram of the utility model.

Detailed ways

As shown in Figure 1, the structure of the light bulb of the present utility model is roughly the same as that of an ordinary light bulb. The lower end of the lamp cap 7 is connected with a plastic shell 8 and a transparent outer cover 15, and the inside thereof is a closed cavity, which is provided with a circuit board 9, a luminous body 11 and reflective paper 14. But its inside is provided with the rechargeable battery 6 and charging indicator light 13 that are connected with the working circuit on the circuit board, also is provided with switch 10 on the shell.

As shown in Fig. 2, the working circuit of the present utility model is made up of parts such as charging circuit 1, storage battery 6, overcharge protection circuit 2, AC/DC power supply conversion circuit 4, overdischarge protection circuit 3 and lighting circuit 5, and their composition and connections are similar to conventional circuits.

The charging circuit 1 is mainly composed of charging connectors AC-2, AC-1, capacitors C1, C2, resistors R1, R2 and bridge rectification circuits D1-D4. The alternating current from AC1 and AC2 provides a current of about 220mA after being shunted by resistors R1 and R2 and voltage divided by capacitors C1 and C2, and then rectified by D1-D4 to provide DC voltage to battery 6 .

The overcharge protection circuit 2 is mainly composed of a transistor Q1, a diode Z1 and resistors R4-R6, when the battery 6 is fully charged. The voltage rises, Q1 turns on, R4 discharges, and the charging current drops to protect the battery. The charging indicator LED11 is also connected to both ends of the circuit after being connected in series with the resistor R7 to play an indication role.

The over-discharge protection circuit 3 is mainly composed of transistors Q2, Q3, diode Z2, capacitor C4 and resistors R10-R13. When the battery voltage drops, Q2 and Q3 are cut off, the light-emitting diodes LED1-LED10 go out, the battery is no longer discharged, and the battery is protected.

The AC-DC power supply conversion circuit 4 is composed of a switch SW1, a diode D7 and a resistor R9. When the switch is in the AC state, it directly supplies power to the light-emitting diodes LED1-LED10 of the lighting circuit without consuming battery power; when the switch is in the DC state, D7 makes Q2 turn off and lights off, and R9 makes Q2 and Q3 work when the power is off, and the lights are automatically turned on.

Claims (2)

1. A rechargeable AC-DC dual-purpose light bulb, comprising a transparent outer cover, a lamp holder arranged on the upper end of the outer cover, a luminous body arranged in the outer cover and a working circuit; the working circuit is a lighting circuit; it is characterized in that: the working circuit A rechargeable battery, a charging circuit and an AC-DC power supply automatic conversion circuit are also connected in the battery. 2. The rechargeable AC/DC dual-purpose light bulb according to claim 1, wherein an overcharge protection circuit and an overdischarge protection circuit are connected to both ends of the rechargeable battery.

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