CN2153904Y

CN2153904Y - Plug type thin dc power supply

Info

Publication number: CN2153904Y
Application number: CN 93206283
Authority: CN
Inventors: 张巨聪
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-11
Filing date: 1993-03-11
Publication date: 1994-01-19
Anticipated expiration: 2003-03-11

Abstract

The utility model relates to a plug type thin DC power supply, which is a current conversion device. The plug type thin DC power supply uses a high frequency oscillation circuit and a high frequency transformer to replace the existing industrial frequency transformer; after input to the utility model, the commercial power is input to a self-excited pulsed oscillator composed of a transistor and a high frequency transformer through voltage reducing rectification, filtration and voltage regulation first, and a low-voltage high frequency pulse electric current is output by a secondary winding of the high frequency transformer and then output low-voltage direct current after rectification and filtration. The utility model has the advantages of simple structure, light weight, favorable electric contact performance and reliable work.

Description

Plug type thin DC power supply

The utility model relates to power supply change-over device, promptly converts suitable DC power supply to from AC power, belongs to the DC power supply class.

At present, be widely used in the pocket radio-cassette player, broadcast receiver, electronic game machine, DC current source on the equipment such as communication equipment, remove battery, outside the storage battery, it mainly is exactly the plug-type current transformer, it is to use Industrial Frequency Transformer, directly civil power is converted to low-voltage DC, because Industrial Frequency Transformer itself seems very heavy, when it is inserted toward supply socket, often because of the weight heaviness, the socket folder is not tight, causes damage and fall on the ground, or because folder does not tightly cause the power supply loose contact, influence work, and storage battery, especially battery, the cost height, long-term use expends bigger, especially there being the commercial power socket power supply local, uses convertor assembly to reduce expenses, in order to overcome the problems referred to above, and satisfy the needs of people to DC power supply.

The purpose of this utility model provides the slim DC power supply of a kind of plug-type;

The technical scheme that realizes the utility model purpose is: the slim DC power supply of plug-type, by casing, exchange the input copper sheet and insert son, base plate, son is inserted in direct current output, printed circuit board (PCB) is formed, it is characterized in that: control circuit is arranged on printed circuit board (PCB), it comprises high-frequency oscillating circuits and high frequency transformer, its annexation is: civil power inputs to the resistance-capacitance depressurization that capacitor C 1 and resistance R 1 are formed in parallel, through diode D1, the D2 rectification is passed to light-emitting diode, after passing through electrochemical capacitor C2 filtering and voltage-stabiliser tube D4 voltage stabilizing then, be connected to the two ends of R3 and R2 series resistance, resistance R 3 one ends link to each other with the elementary end of high frequency transformer T, its other end is connected to the collector electrode of BG pipe, the base stage and R2 one end of another termination of R3 BG pipe, another termination of R2 BG manages emitter, high frequency transformer is elementary to be to be formed in parallel by coil and diode D5, self-excitation coil during high frequency transformer is secondary is connected to the base stage of BG pipe by capacitor C 3 and resistance R 2 with signal, and the secondary output of high frequency transformer is exported low-voltage direct again through the bridge rectifier of D6～D9 after electrochemical capacitor C4 filtering.

Fig. 1 is the slim DC power supply mounted inside of a plug-type schematic diagram;

Fig. 2 is the casing figure of the slim DC power supply of plug-type;

Fig. 3 is the element winding diagram of the slim DC power supply of plug-type.

Wherein: 1-base plate 2-printed circuit board (PCB)

3-exchanges the input copper sheet and inserts sub-4-casing

Sub-6-LED indicator lamp hole is inserted in the output of 5-direct current

Now, further structure of the present utility model is narrated in conjunction with the accompanying drawings by embodiment:

Embodiment: this example is with plastic injection-moulded one-tenth casing and base plate, then printed circuit board (PCB) is installed on the plastic bottom board, and printed circuit board (PCB) is to make by the element winding diagram of Fig. 3.

The utility model is compared the advantage that has with existing current transformer:

1, simple structure, in light weight;

2, electrically contacting property is good, reliable operation;

3, cost is low, and is profitable.

Claims

1, the slim DC power supply of plug-type, by casing, exchange the input copper sheet and insert son, base plate, direct current output and insert sub, printed circuit board (PCB) and formed, it is characterized in that: control circuit is arranged on the printed circuit board (PCB), and it comprises high-frequency oscillating circuits and high frequency transformer.

2, the slim DC power supply of plug-type according to claim 1, it is characterized in that the control circuit formed by high-frequency oscillating circuits and high frequency transformer, its circuit connecting relation is: civil power inputs to the resistance-capacitance depressurization that capacitor C 1 and resistance R 1 are formed in parallel, through diode D1, the D2 rectification is passed to light-emitting diode, after passing through electrochemical capacitor C2 filtering and voltage-stabiliser tube D4 voltage stabilizing then, be connected to the two ends of R3 and R2 series resistance, resistance R 3 one ends link to each other with the elementary end of high frequency transformer T, its other end is connected to the collector electrode of BG pipe, the base stage and R2 one end of another termination of R3 BG pipe, another termination of R2 BG manages emitter, high frequency transformer is elementary to be to be formed in parallel by coil and diode D5, self-excitation coil during high frequency transformer is secondary is connected to the base stage of BG pipe by capacitor C 3 and resistance R 2 with signal, and the secondary output of high frequency transformer is exported low-voltage direct again through the bridge rectifier of D6～D9 after electrochemical capacitor C4 filtering.