Circuit breaker voltage isolation structure

Abstract

The present invention discloses a circuit breaker voltage isolation structure, including a circuit board, a bracket, a push plate, a conductive member and a knob rod, wherein the bracket is mounted on the circuit board, the push plate is slidably mounted on the bracket, the conductive member is mounted on the push plate and can conduct the circuit board with an external circuit, the knob rod is rotatably mounted on the circuit board, the knob rod has a cam, and the cam has a top abutting surface at the top; when the top abutting surface of the cam is not in contact with the push plate, the circuit board and the external circuit are not connected; the knob rod is rotated, the cam pushes the push plate to slide on the bracket, and when the top abutting surface of the cam is rotated to abut against the push plate, the conductive member on the push plate moves with the push plate to conduct the circuit board with the external circuit. The present invention provides a circuit breaker voltage isolation structure, which can quickly and accurately disconnect or connect the external circuit and the circuit board, has good conduction synchronization, and is highly safe to use.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to a circuit breaker voltage isolation structure. Background Art

[0002] With the rapid development of the country, especially the national construction projects such as intelligent manufacturing, intelligent substations, and new infrastructure, the current low-voltage circuit breakers tend to be intelligent or electronic. Some low-voltage circuit breakers need to realize the real-time measurement function of current, voltage, power, frequency and other parameters. Therefore, circuit boards are more or less set in low-voltage circuit breakers. The working voltage of the circuit board may be drawn from the external circuit, and the signal from the external circuit may be used to supply the circuit board for calculation and identification during real-time measurement.

[0003] Low-voltage circuit breakers need to undergo a withstand voltage test to detect the insulation performance of the circuit breaker. However, when facing a withstand voltage test, manufacturers need to cut off the circuit board and external circuit in the low-voltage circuit breaker to avoid damaging the components in the circuit board during the withstand voltage test. For withstand voltage test items, there are two common ways for manufacturers to deal with it: one is to clearly mark on the cover of the circuit breaker that the withstand voltage test cannot be performed, and the other is that the manufacturer sets a corresponding plug interface in the low-voltage circuit breaker. Before the withstand voltage test, the plug interface needs to be unplugged to disconnect the external circuit and the circuit board, and then plugged in after the withstand voltage test is completed. Both of the above methods have major disadvantages. Method 1 cannot detect the insulation performance of the circuit breaker, and method 2 is cumbersome to operate, and requires the cover of the circuit breaker to be removed, which is not very safe and reliable. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a circuit breaker voltage isolation structure which can quickly and accurately disconnect or connect an external circuit and a circuit board, has good conduction synchronization and is highly safe to use.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A circuit breaker voltage isolation structure comprises a circuit board, a bracket, a push plate, a conductive member and a knob rod, wherein the bracket is mounted on the circuit board, the push plate is slidably mounted on the bracket, the conductive member is mounted on the push plate and can conduct the circuit board with an external circuit, the knob rod is rotatably mounted on the circuit board, the knob rod has a cam, and the cam has a top abutting surface at the top end;

[0007] When the cam top abutting surface of the knob rod is not in contact with the push plate, there is no connection between the circuit board and the external circuit; when the knob rod is rotated, the cam of the knob rod pushes the push plate to slide on the bracket, and when the cam top abutting surface of the knob rod is rotated until it abuts against the push plate, the conductive part on the push plate moves with the push plate to connect the circuit board and the external circuit.

[0008] Preferably, it further comprises two pins, one of which is electrically connected to an external circuit, and the other is electrically connected to a circuit board, and the two pins are respectively mounted on the circuit board corresponding to the conductive member;

[0009] The conductive member is a torsion spring having two pins for one-to-one connection with two pins; a mounting post and a limit block are provided on the push plate, the torsion spring is sleeved on the mounting post, and the pins at both ends of the torsion spring are respectively abutted against the limit blocks.

[0010] Preferably, a return spring is further included, wherein the return spring abuts between the bracket and one end of the push plate, and under the elastic force of the return spring, the knob rod is limited between the other end of the push plate and the abutting side wall of the bracket.

[0011] Preferably, the bracket is a cover structure that covers the circuit board, and the bracket includes an installation top wall, two oppositely arranged limiting side walls, and a blocking side wall opposite to the installation entrance. The installation top wall and the two limiting side walls and the blocking side wall form an installation cavity, and the push plate is located in the installation cavity and is slidably installed on the installation top wall of the bracket; a mounting hole is provided on the installation top wall of the bracket, and one end of the knob rod with a cam extends into the installation cavity and is located between the push plate and the blocking side wall of the bracket, and the other end of the knob rod passes through the installation hole and extends out of the circuit breaker.

[0012] Preferably, the limiting side walls are each provided with a limiting protrusion, the limiting protrusions of the two limiting side walls are symmetrical, and are spaced apart from the mounting top wall to form a slide groove, and the push plate has sliding protrusions on both sides, and the sliding protrusions of the push plate are inserted into the slide groove and can slide along the slide groove.

[0013] Preferably, a return spring is provided between the bracket and the push plate, and a first semicircular groove is provided on the mounting top wall of the bracket, one end of the first semicircular groove is provided with a stop protrusion, and the other end has a stop side; a connected avoidance groove and a second semicircular groove are provided on the push plate, and the second semicircular groove is deeper than the avoidance groove to form a stop step; the return spring is placed in the first semicircular groove of the bracket and the second semicircular groove of the push plate, one end of the return spring abuts against the stop protrusion of the bracket, and the other end of the return spring abuts against the stop step of the push plate.

[0014] Preferably, a buckle and a fixed shaft are provided at the bottom end of the bracket, and a fixed through groove matched with the buckle and a fixed hole matched with the fixed shaft are provided on the circuit board.

[0015] Preferably, the knob rod has a rotating shaft located at the bottom end, and the circuit board is provided with a rotating shaft hole matched with the rotating shaft, and the knob rod is rotatably mounted on the rotating shaft hole of the circuit board through the rotating shaft thereon.

[0016] Preferably, it also includes pins and a mounting plate, the number of the pins is six, the six pins are mounted on the mounting plate in two rows and three columns, two pins in each column form a group, and there are three groups of pins in total; there are three conductive members, each conductive member corresponds to a group of pins, a single conductive member is used to conduct two pins in a single group, one pin in a single group of pins is electrically connected to an external circuit through a wire, and the other pin is electrically connected to an electronic component of a circuit board; a connecting column is provided on the bottom surface of the mounting plate, and a first connecting hole matching the connecting column is provided on the circuit board;

[0017] The plug pin includes a first connection part, a second connection part, a blocking part and a third connection part which are connected in sequence, the outer diameter of the third connection part is less than the outer diameter of the first connection part, less than the outer diameter of the second connection part, less than the outer diameter of the blocking part, the first connection part of the plug pin can be connected to a conductive member, and the third connection part can be electrically connected to an external circuit; a second connection hole which matches with the second connection part of the plug pin is provided on the mounting plate, and a third connection hole which matches with the third connection part of the plug pin is provided on the circuit board.

[0018] Preferably, the circuit breaker further comprises a mounting shell, a base, a contact assembly and an upper cover assembly, wherein the mounting shell is mounted in the base, the contact assembly is mounted on one side of the base and can be directly connected to an external circuit, the upper cover assembly is buckled on the base, and a through hole is provided on the upper cover assembly; the circuit board is mounted in a mounting groove of the mounting shell, one end of the knob rod on the circuit board passes through the through hole of the upper cover assembly, and the conductive member is electrically connected to the contact assembly through a wire.

[0019] The circuit breaker voltage isolation structure of the present invention can disconnect the connection between the external circuit and the circuit board through physical isolation, thereby ensuring the safety of the operator during use and testing, and can quickly and accurately disconnect or connect the external circuit and the circuit board, with simple and convenient operation; the rotational motion is converted into a translational motion to push the torsion spring and the pin to connect, with good conduction synchronization.

[0020] In addition, the pin is used as the connection port, and the line port connection structure is simple. The external circuit is connected to the circuit board through a torsion spring, which can both conduct the circuit and ensure the connection pressure through torque, thereby improving reliability. The push plate, the knob rod and the bracket of the present invention cooperate with each other to realize a unique clamping design, and the push plate and the bracket can be used to limit the knob rod when the rotation movement reaches the specified position. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an assembly diagram of the circuit breaker of the present invention;

[0022] Figure 2 is an exploded view of the circuit breaker of the present invention;

[0023] Figure 3 is an exploded view of the voltage isolation structure and the mounting housing of the present invention;

[0024] Figure 4 It is an assembly diagram of the voltage isolation structure and the mounting housing of the present invention;

[0025] Figure 5 is an exploded view of the voltage isolation structure of the circuit breaker of the present invention;

[0026] Figure 6 It is a schematic diagram of a state where the circuit board of the present invention is not connected to an external circuit;

[0027] Figure 7 It is a schematic diagram of the conductive state between the circuit board of the present invention and the external circuit;

[0028] Figure 8 is an exploded view of the pins, mounting plate and circuit board of the present invention;

[0029] Fig. 9 It is an assembly diagram of the pins, the mounting plate and the circuit board of the present invention;

[0030] Fig.10 is an exploded view of the pin and the mounting plate of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the pin of the present invention;

[0032] Fig.12 It is an exploded view of the rotating rod and the bracket of the present invention;

[0033] Fig.13 It is an assembly diagram of the bracket, push plate and return spring of the present invention;

[0034] Fig.14 It is an assembly diagram of the push plate and the bracket of the present invention;

[0035] Fig.15 It is a schematic diagram of the structure of the support of the present invention;

[0036] Fig.16 It is a three-dimensional diagram of the push plate and the conductive member placed horizontally in the present invention;

[0037] Fig.17 It is a three-dimensional diagram of the push plate and the conductive member placed vertically in the present invention;

[0038] Fig.18 It is a bottom perspective view of the push plate of the present invention;

[0039] Fig.19 It is a top perspective view of the push plate of the present invention. DETAILED DESCRIPTION

[0040] The following is combined with Figures 1 to 19The given examples further illustrate the specific implementation of the circuit breaker voltage isolation structure of the present invention. The circuit breaker voltage isolation structure of the present invention is not limited to the description of the following examples.

[0041] like Figure 1 and Figure 2 As shown, the circuit breaker of the present invention includes a voltage isolation structure, a mounting shell 7, a base 81, a contact assembly 82 and an upper cover assembly 83. The mounting shell 7 is mounted in the base 81, the contact assembly 82 is mounted on one side of the base 81 and can be directly connected to an external circuit, and the upper cover assembly 83 is buckled on the base 81, and a through hole 830 is provided on the upper cover assembly 83.

[0042] like Figure 3-5 As shown, the circuit breaker voltage isolation structure of the present invention is installed in the installation groove 701 of the installation housing 7, including a circuit board 2, a bracket 5, a push plate 3, a reset spring 300 for resetting the push plate 3, a conductive member 4, a knob rod 6, a pin 10 and a mounting plate 11 for mounting the pin 10. The circuit board 2 is adapted to the installation groove 701 of the installation housing 7, the bracket 5 is installed on the circuit board 2, the push plate 3 is slidably installed on the bracket 5, and the conductive member 4 is installed on the push plate 3 and can conduct the circuit board 2 with the external circuit. One end of the knob rod 6 passes through the through hole 830 of the upper cover assembly 83 for rotation operation, and the other end of the knob rod 6 is rotatably installed on the circuit board 2. The knob rod 6 has a cam 60, and the cam 60 has a top abutting surface 602 located at the top. The pin 10 is installed on the circuit board 2 corresponding to the conductive member 4. The conductive member 4 is a torsion spring having two pins 401 for one-to-one connection with two pins 10 . One of the two pins 10 is electrically connected to the contact assembly 82 via a wire 100 , and the other pin 10 is electrically connected to the circuit board 2 .

[0043] like Figure 6 As shown, when the top contact surface 602 of the cam 60 of the knob rod 6 is not in contact with the push plate 3, the circuit board 2 is not connected to the external circuit. The knob rod 6 is rotated clockwise, and the cam 60 of the knob rod 6 pushes the push plate 3 to slide leftward on the bracket 5. When the top contact surface 602 of the cam 60 of the knob rod 6 is rotated to contact with the push plate 3, the conductive member 4 on the push plate 3 moves leftward with the push plate 3 until the two pins 401 of the conductive member 4 are connected to the two pins 10 in a one-to-one correspondence, thereby achieving the connection between the circuit board 2 and the external circuit. Figure 7 The knob rod 6 is rotated counterclockwise until the top contact surface 602 of the cam 60 of the knob rod 6 is no longer in contact with the push plate 3. The push plate 3 is not pushed by the cam 60 of the knob rod 6 and moves rightward back to its original position. The conductive member 4 on the push plate 3 moves rightward with the push plate 3. Figure 6As shown, the pin 401 of the conductive member 4 is disconnected from the plug pin 10, and at this time, the circuit board 2 is not connected to the external circuit. The circuit breaker voltage isolation structure of the present invention can disconnect the connection between the external circuit and the circuit board through physical isolation, ensuring the safety of the operator during use and testing, and can quickly and accurately disconnect or connect the external circuit and the circuit board, with simple and convenient operation; the rotational motion is converted into a translational motion to push the torsion spring and the plug pin to connect, and the conduction synchronization is good. In addition, the plug pin is used as the connection port, and the line port connection structure is simple. The external circuit and the circuit board are connected by a torsion spring, which can both conduct the circuit and ensure the connection pressure through torque, thereby improving reliability.

[0044] like Figure 1-2 As shown, the number of contact assemblies 82 is three, which are connected to the external three-phase electricity. Figure 8-10 As shown, there are six pins 10, which are installed on the mounting plate 11 in two rows and three columns. Two pins 10 in each column form a group, and there are three groups of pins 10 in total, which correspond to three groups of contact assemblies 82 one by one. There are three conductive members 4, each of which corresponds to a group of pins 10. A single conductive member 4 is used to conduct two pins 10 in a single group. One pin 10 in a single group of pins 10 is electrically connected to the contact assembly 82 through a wire 100 to achieve electrical connection with an external circuit, and the other pin 10 is electrically connected to the electronic components of the circuit board 2. A connecting column 111 is provided on the bottom surface of the mounting plate 11, and a first connecting hole 201 that matches the connecting column 111 is provided on the circuit board 2. The connecting column 111 of the mounting plate 11 is inserted into the first connecting hole 201 of the circuit board 2 to achieve fixed installation of the mounting plate 11 on the circuit board 2.

[0045] like Fig.11As shown, the pin 10 of the present invention includes a first connecting part 101, a second connecting part 102, a blocking part 103 and a third connecting part 104 which are connected in sequence. The outer diameter of the third connecting part 104 is less than the outer diameter of the first connecting part 101, less than the outer diameter of the second connecting part 102, and less than the outer diameter of the blocking part 103. The first connecting part 101 of the pin 10 can be electrically connected to the conductive part 4 and the circuit board 2, and the third connecting part 104 can be electrically connected to the contact assembly 82. The mounting plate 11 is provided with a second connection hole 112 matched with the second connection portion 102 of the plug pin 10, and the circuit board 2 is provided with a third connection hole 202 matched with the third connection portion 104 of the plug pin 10. The first connection portion 101 of the plug pin 10 passes through the mounting plate 11, and the second connection portion 102 of the plug pin 10 is inserted into the second connection hole 112 of the mounting plate 11. The blocking portion 103 of the plug pin 10 is located between the mounting plate 11 and the circuit board 2. The third connection portion 104 of the plug pin 10 passes through the third connection hole 202 of the circuit board 2 and is welded and fixed to the circuit board 2. The two pins 401 of the single conductive member 4 are connected with the first connection portions 101 of the two plug pins 10 of the single group to realize the conduction of the two plug pins 10 of the single group; the third connection portion 104 of one plug pin 10 in the single group of plug pins 10 is electrically connected to the contact assembly 82 through the wire 100, and the first connection portion 101 of the other plug pin 10 is electrically connected to the electronic component of the circuit board 2.

[0046] like Figure 3-5 As shown, the bracket 5 is an integrally formed cover structure that covers the pins 10 on the circuit board 2. Fig.15 As shown, the bracket 5 includes a mounting top wall 502, two oppositely disposed limiting side walls 503, and a blocking side wall 501 opposite to the mounting entrance. The mounting top wall 502, the two limiting side walls 503, and the blocking side wall 501 form a mounting cavity 500. The push plate 3 is located in the mounting cavity 500 and is slidably mounted on the mounting top wall 502 of the bracket 5. Specifically, the limiting side walls 503 are each provided with a limiting protrusion 504, and the limiting protrusions 504 of the two limiting side walls 503 are symmetrical and are spaced apart from the mounting top wall 502 to form a slide groove. The push plate 3 has sliding protrusions 312 located on both sides, and the sliding protrusions 312 of the push plate 3 are inserted into the slide groove and can slide along the slide groove.

[0047] like Fig.12 As shown, a mounting hole 510 is provided on the mounting top wall 502 of the bracket 5, one end of the knob rod 6 has a rotating shaft 61 at the bottom, and extends into the mounting cavity 500 and is located between the push plate 3 and the abutting side wall 501 of the bracket 5, and the other end of the knob rod 6 passes through the mounting hole 510 of the bracket 5 and the through hole 830 of the upper cover assembly 83 and extends out of the circuit breaker. Figure 5 As shown, the circuit board 2 is provided with a shaft hole 203 that matches the rotating shaft 61, and the knob rod 6 is rotatably mounted on the shaft hole 203 of the circuit board 2 via the rotating shaft 61 thereon. Fig.17As shown, the end of the push plate 3 has a gradually raised first limit surface 306, a second limit surface 307 and a third limit surface 308. Fig.12 As shown, a stopper inclined surface 511 is provided on a limiting side wall 503 of the bracket 5. The cam 60 has side inclined surfaces 601 and side planes 603 located on both sides, and the top abutting surface is an arc-shaped surface. The top abutting surface 602 of the cam 60 matches with the first limiting surface 306 of the push plate 3, the side inclined surface 601 of the cam 60 matches with the stopper inclined surface 511 of the bracket 5 and the second limiting surface 307 of the push plate 3, and the side plane 603 of the cam 60 matches with the abutting side wall 501 of the bracket 5.

[0048] like Fig.12 As shown, the return spring 300 abuts between the bracket 5 and one end of the push plate 3, and the knob rod 6 is limited between the other end of the push plate 3 and the abutting side wall 501 of the bracket 5 under the elastic force of the return spring 300. If it is necessary to connect an external circuit, the knob rod 6 needs to be rotated so that the side inclined surface 601 of the cam 60 of the knob rod 6 fits with the stop inclined surface 511 of the bracket 5, and the push plate 3 is pushed by the return spring 300 so that the first limiting surface 306 of the push plate 3 abuts against the top abutting surface 602 of the cam 60, as shown in FIG. Figure 7 As shown. In this way, the two pins 401 of the torsion spring on the push plate 3 can abut against the two pins 10, so that the circuit board 2 is connected to the external circuit, and the knob rod 6 can be clamped. If the external circuit is to be disconnected, the knob rod 6 is rotated in the opposite direction to disengage the knob rod 6 from the stop bevel 511 of the bracket 5 and the first limit surface 306 of the push plate 3. The push plate 3 is pushed by the force of the reset spring 300 to push the knob rod 6, so that the side bevel 601 of the cam 60 of the knob rod 6 abuts against the second limit surface 307, and the side plane 603 of the cam 60 of the knob rod 6 fits against the stop side wall 501 of the bracket 5. In this way, the circuit board 2 can be disconnected from the external circuit. Figure 6 As shown. The push plate, knob rod and bracket of the present invention cooperate with each other to realize a unique clamping design. When the rotation movement reaches the specified position, the push plate and the bracket can be used to limit the knob rod. The push plate 3 of the present invention is reset by the elastic force of the reset spring 300. Of course, the installation position of the push plate 3 and the knob rod 6 can also be reasonably designed to realize the reset of the push plate 3 by its own gravity. The reset method of the push plate 3 of the present invention is more stable and reliable.

[0049] like Fig.15 As shown, the mounting top wall 502 of the bracket 5 is provided with a first semicircular groove 505 for accommodating the return spring 300, one end of the first semicircular groove 505 is provided with a stop protrusion 506, and the other end of the first semicircular groove 505 has a stop side surface 507. Fig.19As shown, the top surface of the push plate 3 is provided with an avoidance groove 309 for avoiding the resisting protrusion 506 and a second semicircular groove 311 for accommodating the return spring 300, the second semicircular groove 311 is connected with the avoidance groove 309, and the second semicircular groove 311 is deeper than the avoidance groove 309 to form a resisting step 310. The return spring 300 is placed in a guide groove formed by splicing the first semicircular groove 505 of the bracket 5 and the second semicircular groove 311 of the push plate 3, one end of the return spring 300 abuts against the resisting protrusion 506 of the bracket 5, and the other end of the return spring 300 abuts against the resisting step 310 of the push plate 3. During installation, push the push plate 3 into the installation cavity 500 from the installation entrance, the sliding protrusion 312 of the push plate 3 is stuck in the slide groove and can slide along the slide groove until the third limit surface 308 of the push plate 3 is in contact with the abutting side wall 501 of the bracket 5; put the reset spring 300 into the guide groove, one end of the reset spring 300 abuts against the abutting side surface 507, and the other end abuts against the abutting protrusion 506; then push the push plate 3 to move in the direction away from the abutting side wall 501 of the bracket 5, and the push plate 3 uses the abutting step 310 to compress the reset spring 300, thereby leaving installation space for the knob rod 6.

[0050] like Fig.18 As shown, the push plate 3 is provided with a mounting column 301 and a limiting block 302 for limiting and positioning the torsion spring. Figure 16-17 As shown, the torsion spring is sleeved on the mounting column 301, and the pins 401 at both ends of the torsion spring are respectively abutted on the limit block 302 and extend outwardly to protrude from the limit block 302, and the protruding part of the pin 401 corresponds to the pin 10. Specifically, as Fig.18 As shown, one side of the limit block 302 has an obtuse opening 303, the mounting column 301 is located in the opening 303 of the limit block 302 and is spaced apart from the limit block 302, and abutment surfaces 304 are provided on both ends of the limit block 302, and a support protrusion 305 is provided on one of the abutment surfaces 304. Figure 16-17 As shown, one pin 401 of the torsion spring abuts against a connection between an abutting surface 304 and the push plate 3 , and another pin 401 of the torsion spring abuts against a connection between another abutting surface 304 and the supporting protrusion 305 .

[0051] like Fig.15 As shown, the bottom end of the bracket 5 is provided with a buckle 509 and a fixed shaft 508. Figure 5As shown, the circuit board 2 is provided with a fixing through slot 204 matched with the buckle 509 and a fixing hole 205 matched with the fixing shaft 508, the fixing shaft 508 of the bracket 5 is inserted into the fixing hole 205 of the circuit board 2, the buckle 509 of the bracket 5 is inserted into the fixing through slot 204 of the circuit board 2, and the hook of the buckle 509 passes through the fixing through slot 204 and hooks the circuit board 2. Specifically, the number of the buckles 509 and the fixing through slot 204 are both two, and the two correspond one to one; the number of the fixing shaft 508 and the fixing hole 205 are both two, and the two correspond one to one. The two buckles 509 and the two fixing shafts 508 are distributed at four corners, the two buckles 509 are arranged diagonally, and the two fixing shafts 508 are arranged diagonally.

[0052] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker voltage isolation structure, characterized in that: The invention comprises a circuit board (2), a bracket (5), a push plate (3), a conductive member (4) and a knob rod (6), wherein the bracket (5) is mounted on the circuit board (2), the push plate (3) is slidably mounted on the bracket (5), the conductive member (4) is mounted on the push plate (3) and can conduct electricity between the circuit board (2) and an external circuit, and the knob rod (6) is rotatably mounted on the circuit board (2), and the knob rod (6) has a cam (60), and the cam (60) has a top abutting surface (602) located at the top end; When the top abutting surface (602) of the cam (60) of the knob rod (6) is not in contact with the push plate (3), the circuit board (2) and the external circuit are not connected; when the knob rod (6) is rotated, the cam (60) of the knob rod (6) pushes the push plate (3) to slide on the bracket (5), and when the top abutting surface (602) of the cam (60) of the knob rod (6) is rotated to abut against the push plate (3), the conductive member (4) on the push plate (3) moves with the push plate (3) to connect the circuit board (2) and the external circuit.

2. The circuit breaker voltage isolation structure according to claim 1, characterized in that: It also includes two pins (10), one of which is electrically connected to an external circuit, and the other is electrically connected to a circuit board (2), the two pins (10) being mounted on the circuit board (2) and corresponding to the conductive member (4); The conductive member (4) is a torsion spring having two pins (401) for one-to-one connection with the two pins (10); the push plate (3) is provided with a mounting column (301) and a limit block (302); the torsion spring is sleeved on the mounting column (301), and the pins (401) at both ends of the torsion spring are respectively abutted against the limit blocks (302).

3. The circuit breaker voltage isolation structure according to claim 1, characterized in that: It also includes a return spring (300), the return spring (300) abutting between the bracket (5) and one end of the push plate (3), and under the elastic force of the return spring (300), the knob rod (6) is limited between the other end of the push plate (3) and the abutting side wall (501) of the bracket (5).

4. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The bracket (5) is a cover structure that is buckled onto the circuit board (2), and the bracket (5) comprises a mounting top wall (502), two limiting side walls (503) that are arranged opposite to each other, and a blocking side wall (501) that is opposite to the mounting entrance; a mounting cavity (500) is formed between the mounting top wall (502), the two limiting side walls (503), and the blocking side wall (501); the push plate (3) is located in the mounting cavity (500) and is slidably mounted on the mounting top wall (502) of the bracket (5); a mounting hole (510) is provided on the mounting top wall (502) of the bracket (5); one end of the knob rod (6) having a cam (60) extends into the mounting cavity (500) and is located between the push plate (3) and the blocking side wall (501) of the bracket (5); the other end of the knob rod (6) passes through the mounting hole (510) and extends out of the circuit breaker.

5. The circuit breaker voltage isolation structure according to claim 4, characterized in that: The limiting side walls (503) are each provided with a limiting protrusion (504), the limiting protrusions (504) of the two limiting side walls (503) are symmetrical and are spaced apart from the mounting top wall (502) to form a slide groove, the push plate (3) has sliding protrusions (312) located on both sides, and the sliding protrusions (312) of the push plate (3) are inserted into the slide groove and can slide along the slide groove.

6. The circuit breaker voltage isolation structure according to claim 4, characterized in that: A return spring (300) is provided between the bracket (5) and the push plate (3); a first semicircular groove (505) is provided on the mounting top wall (502) of the bracket (5); one end of the first semicircular groove (505) is provided with a stop protrusion (506), and the other end has a stop side (507); a connected avoidance groove (309) and a second semicircular groove (311) are provided on the push plate (3); the second semicircular groove (311) is deeper than the avoidance groove (309) to form a stop step (310); the return spring (300) is placed in the first semicircular groove (505) of the bracket (5) and the second semicircular groove (311) of the push plate (3); one end of the return spring (300) is in contact with the stop protrusion (506) of the bracket (5), and the other end of the return spring (300) is in contact with the stop step (310) of the push plate (3).

7. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The bottom end of the bracket (5) is provided with a buckle (509) and a fixed shaft (508), and the circuit board (2) is provided with a fixed through slot (204) cooperating with the buckle (509) and a fixed hole (205) cooperating with the fixed shaft (508).

8. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The knob rod (6) has a rotating shaft (61) located at the bottom end, and the circuit board (2) is provided with a rotating shaft hole (203) that matches the rotating shaft (61). The knob rod (6) is rotatably mounted on the rotating shaft hole (203) of the circuit board (2) via the rotating shaft (61) thereon.

9. The circuit breaker voltage isolation structure according to claim 1, characterized in that: It also includes plug pins (10) and a mounting plate (11), wherein the number of the plug pins (10) is six, and the six plug pins (10) are mounted on the mounting plate (11) in two rows and three columns, and two plug pins (10) in each column form a group, with a total of three groups of plug pins (10); there are three conductive members (4), each conductive member (4) corresponds to a group of plug pins (10), and a single conductive member (4) is used to conduct two plug pins (10) in a single group, and one plug pin (10) in a single group of plug pins (10) is electrically connected to an external circuit through a wire (100), and the other plug pin (10) is electrically connected to an electronic component of a circuit board (2); a connecting column (111) is provided on the bottom surface of the mounting plate (11), and a first connecting hole (201) that cooperates with the connecting column (111) is provided on the circuit board (2); The plug pin (10) comprises a first connection portion (101), a second connection portion (102), a blocking portion (103) and a third connection portion (104) which are connected in sequence, the outer diameter of the third connection portion (104) being smaller than the outer diameter of the first connection portion (101) and smaller than the outer diameter of the second connection portion (102) and smaller than the outer diameter of the blocking portion (103); the first connection portion (101) of the plug pin (10) can be connected to a conductive member (4), and the third connection portion (104) can be electrically connected to an external circuit; the mounting plate (11) is provided with a second connection hole (112) which matches the second connection portion (102) of the plug pin (10), and the circuit board (2) is provided with a third connection hole (202) which matches the third connection portion (104) of the plug pin (10).

10. The circuit breaker voltage isolation structure according to any one of claims 1 to 9, characterized in that: The circuit breaker further comprises a mounting housing (7), a base (81), a contact assembly (82) and an upper cover assembly (83); the mounting housing (7) is mounted in the base (81); the contact assembly (82) is mounted on one side of the base (81) and can be directly connected to an external circuit; the upper cover assembly (83) is buckled on the base (81), and a through hole (830) is provided on the upper cover assembly (83); the circuit board (2) is mounted in the mounting groove (701) of the mounting housing (7); one end of the knob rod (6) on the circuit board (2) passes through the through hole (830) of the upper cover assembly (83); and the conductive member (4) is electrically connected to the contact assembly (82) via a wire (100).

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