CN201035496Y

CN201035496Y - Computer power supply output post-flashboard

Info

Publication number: CN201035496Y
Application number: CNU2007200204080U
Authority: CN
Inventors: 李宏光; 王洪刚
Original assignee: Ludong University
Current assignee: Ludong University
Priority date: 2007-04-03
Filing date: 2007-04-03
Publication date: 2008-03-12
Anticipated expiration: 2017-04-03

Abstract

The utility model relates to a computer power output rear plug board, which consists of a power input interface connected with a host computer power output end, a voltage adjusting circuit, a filtering protective circuit, an output socket, and a miniature single-pole three-throw switch. Through shifting the single-pole three-throw switch to three different positions, three voltages of 12 V, 9 V, and 5 V can be provided, and the rear plug board is directly plugged on a fixed blocking plate of an expansion slot of a computer.

Description

Computer power supply output back card/back board

Technical field

The utility model relates to a kind of computer power supply card extender of externally powering.

Background technology

At present relevant with computing machine removable external unit is more, for example flash disk, mobile CD writer, portable hard drive etc., generally adopted the directly mode of power supply of USB interface for the working current small device, but the equipment bigger to working current, mostly adopt the external dc power adapter to power, this power supply mode, owing to power supply adaptor need be connected to separately in the 220V supply socket, so, can make desktop seem very in disorder, on the other hand, the user need pay more the expense of buying power supply adaptor.To this; existing relevant patented technology is used for the solution of this problem; the patented technology that as application number is 01267514.8 " computer power supply externally power card extender " is exactly typically a kind of; the mode that it adopts is: a socket is installed on the computing machine backboard; in power supply, draw 12V and 5V voltage; outwards power by this socket,, added corresponding protection circuit in order to prevent the misoperation of big electric current that moment that plug inserts produces to the computer power supply current foldback circuit.But still there is defective in this technology, mainly is: only provide 12V and 5V voltage two kinds of voltages, common many equipment have adopted the form of 9V operating voltage; Though this patent is in order to prevent user's wrong voltage, 12V externally exports with 5V voltage and has adopted two kinds of different sockets, because the attachment plug of equipment does not have certain standard, so when unavoidably wrong plug being arranged, in case wrong plug causes the damage of peripheral hardware easily; The patent No. is that 02233551.X's the patented technology of " the external device of microcomputer power supply " has regulating circuit on its power supply transfer parts, realized the scalable of output voltage, still, be difficult to know current definite output voltage for the final user, so, use and inconvenience.

Summary of the invention

The purpose of this utility model provides a kind of computer power supply output back card/back board, utilize the afterpower of computer power supply to realize safe power supply to external unit, 12V, 9V and 5V can be provided three kinds of voltages, same interface is by the voltage output that single-pole triple-throw (SPTT) switch reality is different, three diverse locations of single-pole triple-throw (SPTT) switch have the clearly sign of three kinds of voltages, and this way of output has overcome the deficiencies in the prior art.

The designed computer power supply output back card/back board of the utility model is made up of power input interface, voltage regulator circuit, filter protective circuit and the accessory power outlet and the small-sized single-pole triple-throw (SPTT) switch that connect this main frame power output end.

In the utility model, filtering circuit comprises inductor and capacitor, and inductor is serially connected with between power input interface and the power output interface, and capacitor is connected in parallel between power output interface and the ground.

In the utility model, in order to obtain the output voltage of 9V, voltage regulator circuit has adopted the integrated voltage stabilizing chip of W7809 to realize the conversion of 12V voltage to 9V voltage.

In the utility model, the power output interface of considering computer-internal is more, be convenient more external unit electricity consumptions, the identical independently circuit of two-way is arranged above the utility model, can constitute two independent output, this allows the purpose of doing be: can guarantee that there is bigger output current on each road, if power output end interface anxiety also can only connect one the tunnel.

The utility model is installed on the cabinet back card/back board position of main frame.

Description of drawings

Fig. 1 is the schematic diagram of the utility model one tunnel

Fig. 2 is the utility model vertical view;

(1) among Fig. 2, (2) are respectively the power output sockets on each road; (3), (4) are respectively the single pole three throw switch on each road; (5), (6) are respectively the power input interfaces that connects computer-internal power supply connector.

Fig. 3 is the utility model rear view.

Specific embodiments

Because the two-way output principle is identical with circuit, for narrating for simplicity, one tunnel principle of work is wherein described, two kinds of voltages of the 5V of an output interface of computer power supply, 12V, power input interface in Fig. 2 (5) is connected respectively to two contacts on one side of single-pole triple-throw (SPTT) switch (2), the shunt of 12V is same behind a regulating circuit that integrated voltage stabilizing chip is formed by W7809 to insert single-pole triple-throw (SPTT) switch (a 2) contact on one side, one side like this single-pole triple-throw (SPTT)

switch

5V, 9V, three kinds of voltages of 12V (shown in Figure 1 as principle) are arranged respectively.Single-pole triple-throw (SPTT) switch another side is as stirring the filtering circuit that termination inductor and capacitor are formed, then, filtering circuit is connected on the power output socket (1), and single-pole triple-throw (SPTT) switch (2) is dialled to three positions and just can be realized three kinds of output voltages of 5V, 9v, 12v on the power output socket (1) like this.

Claims

1. a computer power supply is exported back card/back board; by the computing machine back card/back board; power output socket; power input socket; filtering circuit and regulating circuit are formed; it is characterized in that: respectively there are small-sized single-pole triple-throw (SPTT) switch (2) and (4) below corresponding to each accessory power outlet (1) and (3) on the computing machine back card/back board; throw the position by switching three groups; can make accessory power outlet output 5V; 9V; the voltage of 12V; the struck side of its single-pole triple-throw (SPTT) switch is connected on the filter protective circuit; three stiff end one ends are connected on the 12V voltage of power input socket; one end is connected on the 5V voltage of power input socket, and the other end is connected on the 9V voltage of voltage regulator circuit output.

2. computer power supply output back card/back board according to claim 1 is characterized in that: have two independent can export the voltage accessory power outlet of 5V, 9V, 12V respectively on the computing machine back card/back board.