CN204993084U - Multi-output connection structure of circuit board and multi-output power supply device - Google Patents

Abstract

The utility model discloses a circuit board many output connection structure, including main circuit board, expansion circuit board, fixing base and electric connector, be equipped with the electrical connection terminal on the main circuit board, fixing base fixed mounting in on the main circuit board, expansion circuit board fixed mounting in be provided with the electrical connection terminal on the fixing base and on it, electric connector one end peg graft in on the main circuit board and with the electrical connection terminal electricity of main circuit board be connected, the other end peg graft in on the expansion circuit board and with the electrical connection terminal electricity of expansion circuit board be connected. The utility model discloses an increase the power connection terminal that expands the circuit board and increase at least one connection grafting port, can realize the unit and export more, promoted output efficiency, save the cost, and the fixed expansion circuit board of fixing base for the product structure is firm. The utility model also discloses a many output power supply device that corresponds.

Description

Circuit board multi-output connection structure and multi-output power supply device

technical field

The utility model relates to a power supply device, in particular to a power supply device capable of simultaneously supplying multiple devices.

Background technique

The main purpose of the power supply device is to convert the high-voltage and low-stability AC input power provided by the power company into a low-voltage and stable DC output power suitable for various electronic devices. Therefore, the power supply is widely used in electronic devices such as computers, office automation equipment, industrial control equipment, and communication equipment.

The power supply device generally includes a main circuit board, a power processing unit installed on the main circuit board, and a plug port installed on the main circuit board and electrically connected to the output end of the power processing unit. However, the above-mentioned power supply device only There is only one plug port to supply the power required by the computer interface equipment. The output current of the power supply of the same size is limited, and the output power of the power supply cannot be increased. And because the basic interface equipment that computers must be equipped with is increasing day by day, If the power supply is to be connected with multiple interface devices, multiple main circuit boards with power processing units need to be provided, which increases the manufacturing cost of the power supply. Therefore, there is an urgent need for a power supply device that can solve the above-mentioned problems.

Utility model content

The purpose of the utility model is to provide a circuit board multi-output connection structure, which can perform multiple outputs of a single machine, effectively increase the output power of the power supply, and reduce the manufacturing cost without adding a corresponding main circuit.

Another object of the present invention is to provide a power supply device, which can output multiple power sources without adding circuit processing units, thereby effectively increasing the output power of the power sources and saving costs.

In order to achieve the above purpose, this utility model discloses a circuit board multi-output connection structure, including a main circuit board, an expansion circuit board, a fixing seat and an electrical connector, the main circuit board is provided with electrical terminals, and the fixing The seat is fixedly installed on the main circuit board, the expansion circuit board is fixedly installed on the fixed seat and is provided with an electric terminal, one end of the electrical connector is plugged into the main circuit board and It is electrically connected with the electrical terminal of the main circuit board, and the other end is inserted into the expansion circuit board and electrically connected with the electrical terminal of the expansion circuit board.

Compared with the prior art, the utility model adds at least one power connection terminal by adding an expansion circuit board, which can realize multiple outputs of a single machine, improve output efficiency, and save costs. On the other hand, the expansion circuit board of the utility model is installed on a fixing seat, and the fixing seat is installed on the main circuit board, so that the structure of the multi-output connection structure of the circuit board is stable.

Preferably, the fixed base includes a fixed block and a locking piece, the fixed block is arranged on the main circuit board, the expansion circuit board is supported on the fixed block, and the fixed block is installed on the fixed block through the locking piece On the main circuit board, the expansion circuit board is installed on the fixing block through a locking piece. The expansion circuit board is supported by the fixing block, and the stability of the expansion circuit board is further increased due to the large contact area between the fixing block and the expansion circuit board.

Specifically, there is one fixed block and the main body of the expansion circuit board is supported on the fixed block, the electrical connector is installed on the fixed block and one end thereof is inserted into the main circuit board The other end is plugged into the expansion circuit board and electrically connected to the power connection terminal of the expansion circuit board. In this solution, the electrical connector is installed on the fixing block, so that the fixing block can effectively protect the electrical connector.

Specifically, one or several through ventilation holes are opened on the side of the fixed block to help the equipment dissipate heat.

Specifically, an insertion hole for the electrical connector to pass through is opened on the fixed block, the electrical connector is installed in the insertion hole, and one end is plugged into the main circuit board and connected to the main circuit board. The main circuit board is electrically connected, and the other end is inserted into the expansion circuit board and electrically connected with the expansion circuit board. This solution enables the electrical connector to be directly installed on the fixing seat, has a simple structure and is convenient for assembly.

More specifically, the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include copper pins electrically connected to the power terminals and electrically connected to the signal terminals in a one-to-one correspondence. The pin row, the socket includes a copper pin socket for the copper pin to pass through and a pin row socket for the row pin to pass through, and the copper pin and the pin row are installed in a one-to-one correspondence In the copper pin jack and the pin row jack, and one end is plugged into the main circuit board and electrically connected with the main circuit board, and the other end is plugged into the expansion circuit board and connected to the Expansion board electrical connections. In this solution, the signal transmission is carried out by using pin headers corresponding to the power terminals one by one, so that the signal transmission is stable.

Specifically, there are two fixed blocks and they are arranged on the main circuit board at a certain distance, the two ends of the expansion circuit board are respectively supported on the two fixed blocks, and the electrical connectors are located between the two fixed blocks. between. This solution reduces the cost of the fixing seat and improves the heat dissipation of the fixing seat.

More specifically, the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include copper columns electrically connected to the power terminals and electrically connected to the signal terminals in a one-to-one correspondence. The pin header, the fixed seat also includes a pin header, the pin header is installed between the main circuit board and the expansion circuit board, and the pin header is opened for the corresponding pins to pass through The pin row jacks are installed in the pin row jacks one by one, and one end is plugged into the main circuit board and electrically connected with the main circuit board, and the other end is plugged into the main circuit board. The expansion circuit board is electrically connected with the expansion circuit board; the copper column includes a sheet-shaped copper column body, a first connecting pin protruding downward from the lower end of the copper column body, and a The upper end of the column body protrudes upwards to form a second connecting pin, the copper column body of the copper column is clamped between the main circuit board and the expansion circuit board, and the first connecting pin is plugged into the main circuit board. The circuit board is electrically connected to the main circuit board, and the second connector is plugged into the expansion circuit board and electrically connected to the expansion circuit board. The solution enables the electrical connector to be directly installed between the main circuit board and the expansion circuit board, has a simple structure, is convenient to assemble, and has a good heat dissipation effect.

More specifically, there are two pin headers, and the two pin headers face each other at a certain distance and are installed on the main circuit board and the expansion circuit board respectively.

Specifically, the fixing block is provided with through screw holes, and the main circuit board and the expansion circuit board are respectively provided with a first mounting hole and a second mounting hole corresponding to the screw holes, and the locking member includes A sleeve that is threaded with the screw hole and has an auxiliary mounting hole at its end and a screw that is threaded with the auxiliary mounting hole, and the sleeve is sequentially installed on the first mounting hole and the screw on the main circuit board. hole and the second mounting hole of the expansion circuit board, the screw passes through the second mounting hole and is threadedly installed in the auxiliary mounting hole to fix the main circuit board, the expansion circuit board and the fixing block together. This solution enables the fixing seat to be connected with the main circuit board and the expansion circuit board in a one-time and stable manner.

Preferably, the substrate of the expansion circuit board is an aluminum substrate, which has a better heat dissipation effect than the substrate material used in the existing printed circuit board.

Preferably, an insertion hole for the electrical connector to pass through is opened on the fixing seat, the electrical connector is installed in the insertion hole, and one end is plugged into the main circuit board and It is electrically connected with the main circuit board, and the other end is inserted into the expansion circuit board and electrically connected with the expansion circuit board. This solution enables the electrical connector to be directly installed on the fixing seat, has a simple structure and is convenient for assembly.

Specifically, the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include copper pins electrically connected to the power terminals and copper pins electrically connected to the signal terminals in a one-to-one correspondence. The pin row, the socket includes a copper pin socket for the copper pin to pass through and a pin row socket for the row pin to pass through, and the copper pin and the pin row are installed in a one-to-one correspondence. The copper pin socket and the pin row socket, and one end is inserted on the main circuit board and electrically connected with the main circuit board, and the other end is inserted on the expansion circuit board and connected to the expansion circuit board. The circuit board is electrically connected. In this solution, the signal transmission is carried out by using pin headers corresponding to the power terminals one by one, so that the signal transmission is stable.

Preferably, the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include copper columns electrically connected to the power terminals and electrically connected to the signal terminals in a one-to-one correspondence. The pin header, the fixed seat also includes a pin header, the pin header is installed between the main circuit board and the expansion circuit board, and the pin header is opened for the corresponding pins to pass through The pin row jacks are installed in the pin row jacks one by one, and one end is plugged into the main circuit board and electrically connected with the main circuit board, and the other end is plugged into the main circuit board. The expansion circuit board is electrically connected with the expansion circuit board; the copper column includes a sheet-shaped copper column body, a first connecting pin protruding downward from the lower end of the copper column body, and a The upper end of the column body protrudes upwards to form a second connecting pin, the copper column body of the copper column is clamped between the main circuit board and the expansion circuit board, and the first connecting pin is plugged into the main circuit board. The circuit board is electrically connected to the main circuit board, and the second connector is plugged into the expansion circuit board and electrically connected to the expansion circuit board. The solution enables the electrical connector to be directly installed between the main circuit board and the expansion circuit board, has a simple structure, is convenient to assemble, and has a good heat dissipation effect.

Specifically, there are two pin headers, and the two pin headers face each other at a certain distance and are installed on the main circuit board and the expansion circuit board respectively.

The utility model also discloses a multi-output power supply device, which includes a casing and a multi-output connection structure of a circuit board. The multi-output connection structure of the circuit board is as shown above, and a power processing unit is installed on the main circuit board. The output terminal of the power processing unit is electrically connected to the electrical terminal of the main circuit board, the electrical terminal of the main circuit board is plugged into the first plug-in port, and the electrical terminal of the expansion circuit board is plugged into the second plug-in port. Two plug ports, so that the first plug port and the second plug port respectively output power supply.

Description of drawings

Fig. 1 is a structural schematic diagram of the multi-output connection structure of the circuit board in the first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the multi-output connection structure of the circuit board in FIG. 1 .

FIG. 3 is an exploded schematic diagram of the multi-output connection structure of the circuit board in FIG. 1 .

FIG. 4 is a structural schematic diagram of a fixing block of the multi-output connection structure of the circuit board in FIG. 1 .

FIG. 5 is a structural schematic view from another angle of the multi-output connection structure of the circuit board in FIG. 1 .

Fig. 6 is a structural schematic diagram of the multi-output connection structure of the circuit board in the second embodiment of the present invention.

FIG. 7 is a cross-sectional view of the multi-output connection structure of the circuit board in FIG. 6 .

FIG. 8 is an exploded schematic diagram of the multi-output connection structure of the circuit board in FIG. 6 .

detailed description

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

1 to 5, the utility model discloses a multi-output power supply device, including a housing (not shown in the figure) and a circuit board multi-output connection structure 100, the circuit board multi-output connection structure 100 includes a main circuit board 11. Expansion circuit board 12, fixing seat 13 and electrical connector 14. The main circuit board 11 is equipped with a power processing unit (not shown in the figure), and is provided with an electrical terminal 112, and the electrical terminal 112 is plugged into Connected to the first plug port 151, the fixed base 13 is fixedly mounted on the main circuit board 11, the expansion circuit board 12 is fixedly mounted on the fixed base 13 and has an electrical connection terminal 122 thereon, The electrical terminal 122 is plugged into the second plug port 152, one end of the electrical connector 14 is plugged into the main circuit board 11 and is electrically connected to the electrical terminal 112 of the main circuit board 11, and One end is plugged into the expansion circuit board 12 and electrically connected to the electrical terminal 122 of the expansion circuit board 12 . Wherein, the first plug port 151 and the second plug port 152 respectively output power supply. Wherein, one end of the electrical connector 14 electrically connected to the electrical terminal 112 of the main circuit board 11 is actually connected to the output end of the power processing unit, since the other end of the electrical connector 14 is plugged into the The expansion circuit board 12 is electrically connected to the electrical connection terminal 122 of the expansion circuit board 12, so that the first insertion port 151 and the second insertion port 152 are connected in parallel.

Compared with the prior art, the utility model adds at least one plug-in port 15 by adding an expansion circuit board 12, which can realize multiple outputs of a single machine, improve output efficiency, and save costs. On the other hand, the expansion circuit board 12 of the present invention is installed on a fixing base 13, and the fixing base 13 is installed on the main circuit board 11, so that the installation of the expansion circuit board 12 is more stable.

Referring to FIG. 5 , the electrical terminals 112, 122 include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical terminals 112, 122 are correspondingly plugged into the first plug port 151 and the second plug port. The port 152 includes a power supply terminal 51 for transmitting power and a signal terminal 52 for transmitting signals. The electrical connector 14 includes copper pins 41 electrically connected to the power supply terminals 51 and copper pins 41 electrically connected to the signal terminals 52 in a one-to-one correspondence. Pin header 42. One end of the copper needle 41 is inserted on the main circuit board 11 and is electrically connected with the power terminal 51 of the plug port 151 through the electrical terminal 112 or the wiring (or conductive wire) on the circuit board, and the other end is Inserted on the expansion circuit board 12 and electrically connected to the power terminal 51 of the plug port 152 through the electrical connection terminal 122 or wiring (or conductive wire) on the circuit board. One end of the pin header 42 is plugged into the main circuit board 11 and is electrically connected to the signal terminal 52 of the plug port 151 through the electrical terminal 112 or the wiring (or conductive wire) on the circuit board. The other end is inserted into the expansion circuit board 12 and electrically connected to the signal terminal 52 of the plug port 152 through the electrical terminal 122 or the wiring (or conductive wire) on the circuit board one by one. Of course, the structure of the electrical connector 14 is not limited thereto.

Preferably, the substrate of the expansion circuit board 12 is an aluminum substrate, which has a better heat dissipation effect than the substrate material used in the existing printed circuit board.

1 to 3, the fixed seat 13 includes a fixed block 31 and a locking member 32, the fixed block 31 is arranged on the main circuit board 11, the main body of the expansion circuit board 12 is supported on the support On the fixing block 31 , the fixing block 31 is installed on the main circuit board 11 through a locking member 32 , and the expansion circuit board 12 is installed on the fixing block 31 through a locking member 32 . The electrical connector 14 is mounted on the fixed block 31 and one end thereof is plugged into the main circuit board 11 and is electrically connected to the electrical terminal 112 of the main circuit board 11, and is connected to the electrical terminal 112 through the electrical terminal 112. The plug port 15 is plugged and electrically connected, and the other end is plugged on the expansion circuit board 12 and is electrically connected with the power connection terminal 122 of the expansion circuit board 12, and is plugged into the plug port 5 through the power connection terminal 122. connected electrically. In this solution, the electrical connector 14 is installed on the fixing block, so that the fixing block can effectively protect the electrical connector 14 .

2 to 4, the fixing block 31 is provided with a through screw hole 313, the main circuit board 11 is provided with a first mounting hole 111 corresponding to the screw hole 313, and the expansion circuit board 12 is provided with There is a second installation hole 121 corresponding to the screw hole 313, and the locking member 32 includes a sleeve 321 which is threadedly fitted with the screw hole 313 and has an auxiliary installation hole 323 at its end and is connected to the auxiliary installation hole 323. Threaded screw 322, the sleeve 321 is sequentially installed on the first mounting hole 111, the screw hole 313 and the second mounting hole 121 of the expansion circuit board 12 on the main circuit board 11, and the screw 322 passes through The second mounting hole 121 is screwed into the auxiliary mounting hole 323 to fix the main circuit board 11 , the expansion circuit board 12 and the fixing block 31 together. This solution enables the fixing base 13 to be connected with the main circuit board 11 and the expansion circuit board 12 in one go and stably. Of course, the fixing block 31 can also be fixed on the main circuit board 11 and the expansion circuit board 12 can be fixed on the fixing block 31 through other structures of locking elements.

Preferably, referring to FIG. 1 and FIG. 4 , one or several through ventilation holes 312 are opened on the side of the fixing block 31 to help the equipment dissipate heat.

Referring to FIG. 4 , the fixed block 31 is provided with an insertion hole 311 through which the electrical connector 14 passes. The electrical connector 14 is installed in the insertion hole 311 and one end is plugged into the The main circuit board 11 is electrically connected to the main circuit board 11 , and the other end is plugged to the expansion circuit board 12 and electrically connected to the expansion circuit board 12 . Correspondingly, the insertion holes 311 are divided into copper needle insertion holes 3111 through which the copper pins 41 pass through correspondingly, and pin row insertion holes 3112 through which the row pins 42 correspondingly pass through. 1 to 3, the copper pins 41 are installed in the copper pin sockets 3111 one by one, and one end is plugged into the main circuit board 11 and electrically connected to the main circuit board 11, The other end is inserted into the expansion circuit board 12 and electrically connected with the expansion circuit board 12 . The pin headers 42 are installed in the pin header sockets 3112 in one-to-one correspondence, and one end is plugged into the main circuit board 11 and electrically connected with the main circuit board 11, and the other end is plugged into the main circuit board 11. The expansion circuit board 12 is electrically connected with the expansion circuit board 12 .

Referring to Fig. 6 to Fig. 8, it is the second embodiment of the present utility model, which discloses another circuit board multi-output connection structure 100a. The difference from the first embodiment is that in this embodiment, the fixing seat 13a It includes two fixed blocks 31a, and the two fixed blocks 31a are arranged on the main circuit board 11 at a certain distance, and the two ends of the expansion circuit board 12 are respectively supported on the two fixed blocks 31a, and the electrical connection The piece 14 is located between the two fixing blocks 31a. This solution reduces the cost of the fixing seat 31 a and improves the heat dissipation of the fixing seat 13 .

7 and 8, different from the first embodiment, in this embodiment, the fixing seat 13a further includes a pin header 33, and the pin header 33 is installed on the main circuit board 11 and the expansion Between the circuit boards 12, and the pin row seat 33 is provided with a pin row jack 331 for the said pin row 42 to pass through correspondingly, and the said pin row 42 is installed in the said pin row jack 311 in a one-to-one correspondence One end is plugged into the main circuit board 11 and electrically connected to the main circuit board 11 , and the other end is plugged into the expansion circuit board 12 and electrically connected to the expansion circuit board 12 . The copper post 41a includes a sheet-shaped copper post body 411, a first connection pin 412 protruding downward from the lower end of the copper post body 411, and a second connection pin 412 protruding upward from the upper end of the copper post body 411. Pin 413, the copper column body 411 of the copper column 41a is clamped between the main circuit board 11 and the expansion circuit board 12, and the first connecting pin 412 is inserted into the main circuit board 11 and the The main circuit board 11 is electrically connected, and the second connector 413 is inserted into the expansion circuit board 12 and electrically connected with the expansion circuit board 12 . This solution allows the electrical connector 14 to be directly installed between the main circuit board 11 and the expansion circuit board 12, and has a simple structure, convenient assembly and good heat dissipation. Wherein, there are two pin headers 33 , and the two pin headers 33 face each other at a certain distance and are mounted on the main circuit board 11 and the expansion circuit board 12 respectively.

It should be noted that the number of expansion circuit boards 12 of the present utility model is not limited to one, and more than two expansion circuit boards can also be set according to actual needs, and other expansion circuit boards can be fixed to the first expansion circuit board through another fixing seat. The expansion circuit board 12 can also be fixed on other places of the main circuit board 11. The utility model uses a fixing seat to install the expansion circuit board so that when several expansion circuit boards are stacked, the product structure is still stable and will not be caused by gravity. The circuit board is deformed. Wherein, when the second expansion circuit board is superimposed on the first expansion circuit board through the fixing base, the electrical connector directly passes through the main circuit board, the first expansion circuit board and the second expansion circuit board and connects with the main circuit board respectively. The electrical connection terminal of the circuit board, the electrical connection terminal of the first expanded circuit board and the electrical connection terminal of the second expanded circuit board are electrically connected without adding new electrical connectors.

What is disclosed above is only the preferred embodiment of the present utility model, and of course the scope of rights of the present utility model cannot be limited with this. Therefore, the equivalent changes made according to the patent scope of the utility model still belong to the scope covered by the utility model .

Claims (16)

1. A circuit board multi-output connection structure, characterized in that: it comprises a main circuit board, an expansion circuit board, a fixed seat and an electrical connector, the main circuit board is provided with an electrical terminal, and the fixed seat is fixedly mounted on On the main circuit board, the expansion circuit board is fixedly installed on the fixing seat and has an electrical terminal on it, and one end of the electrical connector is inserted on the main circuit board and connected to the main circuit board. The electric terminal of the board is electrically connected, and the other end is plugged into the expansion circuit board and electrically connected with the electric terminal of the expansion circuit board. 2. The circuit board multi-output connection structure according to claim 1, wherein the fixed seat includes a fixed block and a locking piece, the fixed block is arranged on the main circuit board, and the extended circuit board supports On the fixed block, the fixed block is installed on the main circuit board through a locking piece, and the expansion circuit board is installed on the fixed block through a locking piece. 3. The circuit board multi-output connection structure according to claim 2, characterized in that: there is one fixed block and the main body of the expanded circuit board is supported on the fixed block, and the electrical connector is installed On the fixed block, one end of which is plugged on the main circuit board and electrically connected to the electrical terminal of the main circuit board, and the other end is plugged on the expansion circuit board and connected to the expansion circuit board The electrical terminals are electrically connected. 4. The circuit board multi-output connection structure according to claim 3, characterized in that: one or several through ventilation holes are opened on the side of the fixing block. 5. The circuit board multi-output connection structure according to claim 3, characterized in that: said fixing block is penetrated with a jack for said electrical connector to pass through, and said electrical connector is installed on said One end is inserted into the main circuit board and electrically connected to the main circuit board, and the other end is inserted into the expansion circuit board and electrically connected to the expansion circuit board. 6. The circuit board multi-output connection structure according to claim 5, characterized in that: the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include electrical terminals connected to the power terminals. The connected copper pins are electrically connected with the signal terminals and have a one-to-one correspondence with the pin headers, and the socket includes a copper pin insertion hole for the copper pins to pass through and a pin header for the corresponding pins to pass through. jack, the copper pins and row pins are installed in the copper pin jacks and pin row jacks in one-to-one correspondence, and one end is plugged into the main circuit board and electrically connected to the main circuit board , and the other end is inserted into the expansion circuit board and electrically connected with the expansion circuit board. 7. The circuit board multi-output connection structure according to claim 2, characterized in that: there are two fixed blocks and they are arranged on the main circuit board at a certain distance, and the two ends of the expansion circuit board are respectively supported on two On the fixed blocks, the electrical connector is located between the two fixed blocks. 8. The circuit board multi-output connection structure according to claim 7, characterized in that: the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include electrical terminals connected to the power terminals. The connected copper pillars are electrically connected with the signal terminals and have one-to-one corresponding pin headers, and the fixing seat also includes a pin header, and the pin header is installed between the main circuit board and the expansion circuit board, and The pin row seat is provided with a pin row jack for the corresponding row of pins to pass through. The pin row pins are installed in the pin row jack one by one, and one end is plugged into the main circuit board. and electrically connected with the main circuit board, and the other end is inserted into the expansion circuit board and electrically connected with the expansion circuit board; the copper column includes a sheet-shaped copper column body, and the The lower end protrudes downwards to form a first connecting foot, and the upper end of the copper pillar body protrudes upwards to form a second connecting foot, and the copper pillar body of the copper pillar is clamped on the main circuit board and the expansion circuit board between, and the first connecting pin is plugged into the main circuit board and electrically connected with the main circuit board, and the second connector is plugged into the expansion circuit board and electrically connected with the expansion circuit board connect. 9. The circuit board multi-output connection structure according to claim 8, characterized in that: there are two pin headers, and the two pin headers face each other at a certain distance and are respectively installed on the main circuit board and expansion boards. 10. The circuit board multi-output connection structure according to claim 2, characterized in that: said fixing block is provided with through screw holes, said main circuit board and expansion circuit board are respectively provided with said screw holes Corresponding to the first installation hole and the second installation hole, the locking member includes a sleeve that is threaded with the screw hole and has an auxiliary installation hole at its end and a screw that is threaded with the auxiliary installation hole. The cylinder is sequentially installed on the first installation hole, the screw hole and the second installation hole of the expansion circuit board on the main circuit board, and the screw passes through the second installation hole and is threadedly installed in the auxiliary installation hole to fix the main circuit board, expansion circuit board and fixing block together. 11. The circuit board multi-output connection structure according to claim 1, wherein the substrate of the expansion circuit board is an aluminum substrate. 12. The circuit board multi-output connection structure according to claim 1, characterized in that: said fixing base is penetrated with a jack for said electrical connector to pass through, and said electrical connector is installed on said One end is inserted into the main circuit board and electrically connected to the main circuit board, and the other end is inserted into the expansion circuit board and electrically connected to the expansion circuit board. 13. The circuit board multi-output connection structure according to claim 12, characterized in that: the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include electrical terminals connected to the power terminals. The connected copper pins are electrically connected with the signal terminals and have a one-to-one correspondence with the pin headers, and the socket includes a copper pin insertion hole for the copper pins to pass through and a pin header for the corresponding pins to pass through. jack, the copper pins and row pins are installed in the copper pin jacks and pin row jacks in one-to-one correspondence, and one end is plugged into the main circuit board and electrically connected to the main circuit board , and the other end is inserted into the expansion circuit board and electrically connected with the expansion circuit board. 14. The circuit board multi-output connection structure according to claim 1, characterized in that: the electrical terminals include power terminals for transmitting power and signal terminals for transmitting signals, and the electrical connectors include electrical terminals connected to the power terminals. The connected copper pillars are electrically connected with the signal terminals and have one-to-one corresponding pin headers, and the fixing seat also includes a pin header, and the pin header is installed between the main circuit board and the expansion circuit board, and The pin row seat is provided with a pin row jack for the corresponding row of pins to pass through. The pin row pins are installed in the pin row jack one by one, and one end is plugged into the main circuit board. and electrically connected with the main circuit board, and the other end is inserted into the expansion circuit board and electrically connected with the expansion circuit board; the copper column includes a sheet-shaped copper column body, and the The lower end protrudes downwards to form a first connecting foot, and the upper end of the copper pillar body protrudes upwards to form a second connecting foot, and the copper pillar body of the copper pillar is clamped on the main circuit board and the expansion circuit board between, and the first connecting pin is plugged into the main circuit board and electrically connected with the main circuit board, and the second connector is plugged into the expansion circuit board and electrically connected with the expansion circuit board connect. 15. The circuit board multi-output connection structure according to claim 14, characterized in that there are two pin headers, and the two pin headers face each other at a certain distance and are installed on the main circuit board respectively. and expansion boards. 16. A multi-output power supply device, characterized in that it comprises a housing and the circuit board multi-output connection structure according to any one of claims 1-15, a power processing unit is mounted on the main circuit board, The output end of the power processing unit is electrically connected to the electrical terminal of the main circuit board, the electrical terminal of the main circuit board is plugged into the first plug-in port, and the electrical terminal of the expansion circuit board is plugged into the The second plug port, so that the first plug port and the second plug port respectively output power supply.