Circuit breaker voltage isolation structure

Abstract

The circuit breaker voltage isolation structure comprises a circuit breaker shell, a circuit breaker body assembly, a controller and a voltage isolation device, the circuit breaker body assembly is provided with a first wiring end and a second wiring end, and the voltage isolation device comprises a device shell, an on-off mechanism installed in the device shell and at least one wiring assembly. The device shell is directly fixed on the circuit breaker shell, the wiring assembly comprises two static conductive pieces, each static conductive piece is provided with a wiring part, the device shell is provided with a first through hole for the wiring part to penetrate out, the wiring part of one static conductive piece in the wiring assembly is electrically connected with the second wiring end, and the wiring part of the other static conductive piece is electrically connected with the controller. According to the circuit breaker voltage isolation structure, the on-off mechanism and the wiring assembly are integrated in the device shell to form an independent voltage isolation device, the voltage isolation device is not directly connected with the controller, the occupied space is small, and the circuit breaker voltage isolation structure conforms to the miniaturization and modularization design trend of a circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a circuit breaker voltage isolation structure. Background Technology

[0002] With the rapid development of the country, especially the successive implementation of national-level projects such as intelligent manufacturing, intelligent distribution transformers, and new infrastructure, low-voltage circuit breakers are now trending towards intelligent or electronic designs. Some low-voltage circuit breakers need to achieve real-time measurement of parameters such as current, voltage, power, and frequency. Therefore, low-voltage circuit breakers are more or less equipped with circuit boards. The operating voltage of the circuit board may be drawn from the external circuit, and during real-time measurement, signals from the external circuit may also be supplied to the circuit board for calculation and identification.

[0003] Low-voltage circuit breakers require withstand voltage testing to check their insulation performance. However, when facing withstand voltage testing, manufacturers need to disconnect the circuit board and external circuits in the low-voltage circuit breaker to avoid damaging the components on the circuit board during the withstand voltage test.

[0004] In the existing technology, the voltage isolation device is integrated with the circuit board, which occupies a large space, is not conducive to the miniaturization and modularization of circuit breakers, is inconvenient to install and disassemble, and has poor electrical insulation due to the direct connection between the voltage isolation device and the circuit board. Utility Model Content

[0005] The purpose of this utility model is to overcome at least one defect of the prior art and provide a circuit breaker voltage isolation structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A circuit breaker voltage isolation structure includes a circuit breaker housing, a circuit breaker body assembly installed inside the circuit breaker housing, a controller, and a voltage isolation device. The circuit breaker body assembly has a first terminal and a second terminal located on opposite sides of the circuit breaker housing. The voltage isolation device includes a device housing, a switching mechanism installed inside the device housing, and at least one set of wiring assemblies. The device housing is directly fixed to the circuit breaker housing. The wiring assembly includes two stationary conductive elements spaced apart. Each stationary conductive element has a wiring portion. The device housing has a first through hole for the wiring portion to pass through. The wiring portion of one stationary conductive element in the wiring assembly is electrically connected to the second terminal of the circuit breaker body assembly, and the wiring portion of the other stationary conductive element is electrically connected to the controller. The switching mechanism includes a moving conductive element corresponding to the wiring assembly. The moving conductive element is movable between a disconnected position and a connected position. When the moving conductive element moves to the disconnected position, it disconnects the two stationary conductive elements of the corresponding wiring assembly. When the moving conductive element moves to the connected position, it connects the two stationary conductive elements of the corresponding wiring assembly.

[0008] Optionally, the controller is located above the first terminal of the circuit breaker body assembly, the voltage isolation device is located above the second terminal of the circuit breaker body assembly, and the first through hole is provided on the bottom side of the device housing.

[0009] Optionally, the outer side of the device housing is provided with creepage ribs and / or creepage grooves on the side where the first perforation is located.

[0010] Optionally, the static conductive component includes a static contact piece, with both ends of the static contact piece fixed to the device housing. A static contact point that cooperates with the moving conductive component is provided on one side of the middle portion of the static contact piece, and a sheet-like wiring portion is provided on the side of the static contact piece.

[0011] Optionally, the device housing is provided with two slots that respectively mate with the two ends of the stationary contact piece, and a limiting plate connected between the side walls of the two slots. The two ends of the stationary contact piece are respectively inserted and fixed in the slots, and the side of the stationary contact piece facing away from the stationary contact point is in contact with the limiting plate.

[0012] Optionally, the switching mechanism further includes a knob, a push rod, and an elastic element. The movable conductive element is fixed on the push rod, and the push rod is linearly slidably mounted on the device housing. The knob has a driving part and is rotatably mounted on the device housing, capable of rotating between a first position and a second position. When the knob rotates from the first position to the second position, the driving part drives the push rod to slide against the force of the elastic element. The sliding of the push rod causes the movable conductive element to move from the on position to the off position. When the knob rotates from the second position to the first position, it drives the driving part to avoid the push rod, causing the push rod to slide under the force of the elastic element. The sliding of the push rod causes the movable conductive element to move from the off position to the on position.

[0013] Optionally, the moving conductive component includes a moving contact piece, the middle part of which is fixed on the push rod, and the two ends of the moving contact piece are respectively provided with moving contacts, which are respectively arranged opposite to the two static conductive components of the corresponding wiring assembly.

[0014] Optionally, the push rod is provided with a limiting groove and a positioning post. The middle part of the movable contact piece is limited in the limiting groove of the push rod. The two ends of the movable contact piece with the movable contact point extend out of the limiting groove respectively. The middle side of the movable contact piece is bent to provide a positioning piece. The positioning piece is provided with a positioning hole. The positioning piece is sleeved on the positioning post through the positioning hole.

[0015] Optionally, the device housing is provided with a slide groove, the push rod is slidably disposed in the slide groove, the two static conductive parts of the wiring assembly are located on both sides of the width direction of the slide groove, the knob rod is located on one side of the length direction of the slide groove, and the elastic element is located in the slide groove and on the side of the push rod away from the knob rod.

[0016] Optionally, the housing of the device is provided with a first stop and a second stop, and the rotation limit of the drive unit is located between the first stop and the second stop.

[0017] The voltage isolation structure of this utility model integrates the switching mechanism and wiring components into the device housing to form an independent voltage isolation device. The voltage isolation device is not directly connected to the controller. The overall structure is simple, occupies less space, conforms to the trend of miniaturization and modular design of circuit breakers, is easy to install and disassemble, and has good electrical isolation performance, which will not damage the components in the controller.

[0018] In addition, creepage ribs and / or creepage grooves are provided on the outside of the device housing to increase the creepage distance. This maximizes the creepage distance when the controller is disconnected from the external circuit in the most compact space, ensuring that the circuit breaker can complete the withstand voltage test without removing the controller's circuit board.

[0019] In addition, by rotating the knob, the push rod can slide in opposite directions to drive the moving conductive component to connect or disconnect the two stationary conductive components of the wiring assembly. This allows for quick and accurate connection or disconnection of the controller and external circuits, making operation simple and convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the circuit breaker with the cover removed from the circuit breaker housing according to this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the voltage isolation device with wires in the disconnected state of this utility model, showing the removal of the cover;

[0022] Figure 3 This is a cross-sectional view of the voltage isolation device of this utility model in the disconnected state;

[0023] Figure 4 This is a structural schematic diagram of the back of the support of this utility model;

[0024] Figure 5 This is a structural schematic diagram of the front of the support of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the cover of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the voltage isolation device under the conducting state with the cover removed.

[0027] Figure 8 This is a schematic diagram of the voltage isolation device with the cover removed in the disconnected state of this utility model;

[0028] Figure 9 This is a structural schematic diagram of the static conductive component of this utility model;

[0029] Figure 10 This is a schematic diagram of the structure of the moving and conductive component and the push rod of this utility model;

[0030] Figure 11 This is a schematic diagram of the structure of the knob rod of this utility model.

[0031] Voltage isolation device 100; device housing 1; first through hole 101; second through hole 102; creepage rib 103; creepage groove 104; slot 105; limiting plate 106; sliding groove 107; rotating hole 108; first stop part 109; second stop part 110; second spring groove 111; limiting post 112; support 11; cover 12;

[0032] Wiring assembly 200; first wire 201; second wire 202; static conductive component 2; wiring part 21; static contact piece 22; static contact point 23;

[0033] 3. Moving conductive element; 31. Moving contact piece; 32. Moving contact point; 33. Positioning piece;

[0034] Knob lever 4; operating part 41; driving part 42; push surface 421; first side stop surface 422; second side stop surface 423; rotating part 43;

[0035] Push rod 5; Limiting groove 51; Positioning pin 52; Positioning groove 53;

[0036] Elastic component 6;

[0037] Circuit breaker housing 7; first terminal 81; second terminal 82; controller 9. Detailed Implementation

[0038] The specific embodiments of the circuit breaker voltage isolation structure of this utility model are further described below with reference to the accompanying drawings. The circuit breaker voltage isolation structure of this utility model is not limited to the descriptions in the following embodiments.

[0039] like Figure 1 As shown, the circuit breaker voltage isolation structure of this embodiment includes a circuit breaker housing 7, a circuit breaker body assembly installed inside the circuit breaker housing 7, a controller 9, and a voltage isolation device 100. The circuit breaker body assembly is provided with a first terminal 81 and a second terminal 82 located on opposite sides of the circuit breaker housing 7 for connection to an external circuit.

[0040] In particular, such as Figures 2-4 As shown, the voltage isolation device 100 includes a device housing 1, a switching mechanism installed inside the device housing 1, and at least one set of wiring assemblies 200. The device housing 1 is directly fixed to the circuit breaker housing 7. The wiring assembly 200 includes two stationary conductive elements 2 spaced apart, and each stationary conductive element 2 is provided with a wiring portion 21. Figure 9The device housing 1 has a first through hole 101 for the wiring portion 21 to pass through. The wiring portion 21 of one stationary conductive element 2 in the wiring assembly 200 is electrically connected to the second terminal 82 of the circuit breaker body assembly, and the wiring portion 21 of the other stationary conductive element 2 is electrically connected to the controller 9. The switching mechanism includes a movable conductive element 3 corresponding to the wiring assembly 200. The movable conductive element 3 can move between a disconnected position and a connected position, such as... Figure 8 As shown, when the moving conductive element 3 moves to the disconnect position, it disconnects the two stationary conductive elements 2 of the corresponding wiring assembly 200, that is, it disconnects the controller 9 from the external circuit; as Figure 7 As shown, when the moving conductive element 3 moves to the conducting position, it conducts the two stationary conductive elements 2 of the corresponding wiring assembly 200, that is, it connects the controller 9 and the external circuit.

[0041] It should be noted that the circuit breaker body assembly typically includes an operating mechanism, a moving contact, and a stationary contact. The operating mechanism drives the moving contact to contact or separate from the stationary contact, thereby realizing the opening and closing of the circuit breaker. The circuit breaker body assembly may also be equipped with an arc extinguishing device, a short-circuit protection device, and an overload protection device. The controller 9 typically includes a circuit board. The circuit breaker body assembly and the controller 9 are existing technologies in this field and will not be described in detail here.

[0042] The circuit breaker voltage isolation structure of this embodiment integrates the switching mechanism and wiring assembly 200 into the device housing 1 to form an independent voltage isolation device 100. The voltage isolation device is not directly connected to the controller 9. The overall structure is simple, occupies less space, conforms to the trend of miniaturization and modular design of circuit breakers, is easy to install and disassemble, and has good electrical isolation performance, which will not damage the components in the controller 9.

[0043] For example, the device housing 1 and the circuit breaker housing 7 are fixed together by screws, and screw holes are provided on both the device housing 1 and the circuit breaker housing 7. The device housing 1 includes a support 11 and a cover 12 that fit together, and the support 11 and the cover 12 are fixed together by a snap-fit ​​engagement of a fixing post and a fixing hole. Of course, the fixing method between the device housing 1 and the circuit breaker housing 7, and between the support 11 and the cover 12, can also be a snap-fit ​​fixing or other fixing methods.

[0044] Preferably, the controller 9 is located above the first terminal 81 of the circuit breaker body assembly, and the voltage isolation device 100 is located above the second terminal 82 of the circuit breaker body assembly. The circuit breaker housing 7 has a first mounting slot corresponding to the controller 9 and a second mounting slot corresponding to the voltage isolation device 100. The first through-hole 101 of the voltage isolation device 100 is located on the bottom side of the support 11 of the housing 1. The wiring portion 21 of one static conductive component 2 in the wiring assembly 200 extends out of the first through-hole 101 and is electrically connected to the second terminal 82 of the circuit breaker body assembly via a first wire 201. The wiring portion 21 of the other static conductive component 2 extends out of the first through-hole 101 and is electrically connected to the controller 9 via a second wire 202. The wiring portion 21 of the static conductive component 2 is electrically connected to the first wire 201 and the second wire 202 by welding or other fixed connection methods. The controller 9 and the voltage isolation device 100 are separately arranged in a reasonable layout, keeping the controller 9 as far away from the voltage isolation device 100 as possible within a compact space, thus improving electrical isolation performance.

[0045] like Figure 4 As shown, the outer side of the device housing 1 on the side where the first through hole 101 is located (i.e., the outer side of the bottom side of the device housing 1) is provided with creepage ribs 103 and / or creepage grooves 104. Providing creepage ribs 103 and / or creepage grooves 104 on the outer side of the device housing 1 increases the creepage distance, maximizing the creepage distance when the controller 9 is disconnected from the external circuit within a compact space, ensuring that the circuit breaker can complete the withstand voltage test without removing the circuit board of the controller 9. Preferably, the creepage ribs 103 are a crisscrossing rib structure, dividing the bottom side of the device housing 1 into multiple independent partition areas. Each first through hole 101 is located in a separate partition area, that is, the wiring portion 21 of each static conductive component 2 is located in a separate partition area. Each partition area is also provided with a creepage groove 104.

[0046] like Figure 9 As shown, the specific structure of the static conductive component 2 in this embodiment includes a static contact piece 22. Both ends of the static contact piece 22 are fixed to the device housing 1. A static contact point 23, which cooperates with the moving conductive component 3, is provided on one side of the middle portion of the static contact piece 22. A sheet-like wiring portion 21 protrudes from the side of the static contact piece 22, making the static conductive component 2 a T-shaped sheet structure. The static conductive component 2 has a simple structure and can reliably contact the moving conductive component 3, improving the reliability of the switching mechanism.

[0047] like Figure 5 , Figure 8 , Figure 9As shown in the figure, the installation structure of the static conductive component 2 in this embodiment includes two slots 105 on the device housing 1 that respectively mate with the two ends of the static contact piece 22, and a limiting plate 106 connecting the two side walls of the slots 105. The two ends of the static contact piece 22 are respectively inserted and fixed in the slots 105, and the side of the static contact piece 22 facing away from the static contact point 23 is in contact with the limiting plate 106. The static conductive component 2 is inserted into the slots 105 of the device housing 1, which is convenient and reliable for installation. The limiting plate 106 not only limits and positions the static conductive component 2, but also separates the static conductive components 2 of two adjacent sets of wiring assemblies 200.

[0048] like Figure 3 , Figure 7 , Figure 8 As shown, the specific structure of the switching mechanism in this embodiment includes a knob 4, a push rod 5, and an elastic element 6. The movable conductive element 3 is fixed on the push rod 5. The push rod 5 is linearly slidably disposed on the device housing 1. The knob 4 is provided with a driving part 42. The knob 4 is rotatably mounted on the device housing 1 and can rotate between a first position and a second position. Figure 8 As shown, when the knob lever 4 rotates from the first position to the second position, the drive unit 42 drives the push rod 5 to slide against the force of the elastic element 6. The sliding of the push rod 5 causes the conductive element 3 to move from the conducting position to the disconnected position; as shown Figure 7 As shown, when the knob 4 rotates from the second position to the first position, it drives the drive unit 42 to avoid the push rod 5, causing the push rod 5 to slide under the force of the elastic member 6. The sliding of the push rod 5 causes the moving conductive member 3 to move from the disconnected position to the connected position. By rotating the knob 4, the push rod 5 slides in opposite directions, thereby driving the moving conductive member 3 to connect or disconnect the two stationary conductive members 2 of the wiring assembly 200. This allows for quick and accurate connection or disconnection of the controller 9 and the external circuit, making operation simple and convenient.

[0049] like Figure 8 , Figure 10 As shown, the specific structure of the movable conductive component 3 in this embodiment includes a movable contact piece 31. The middle part of the movable contact piece 31 is fixed on the push rod 5. Movable contacts 32 are respectively provided at both ends of the movable contact piece 31, which are respectively arranged opposite to the two stationary conductive components 2 of the corresponding wiring assembly 200. The movable contact piece 31 is preferably an arc-shaped piece, and the movable contacts 32 are arranged on the arc-shaped concave side of the movable contact piece 31, that is, the arc-shaped concave side of the movable contact piece 31 faces the stationary conductive component 2, which is conducive to reliable contact between the movable conductive component 3 and the stationary conductive component 2.

[0050] like Figure 8 , Figure 10As shown in the figure, in the installation structure of the movable conductive component 3 in this embodiment, the push rod 5 is provided with a limiting groove 51 and a positioning post 52. The middle part of the movable contact piece 31 is limited in the limiting groove 51 of the push rod 5. The two ends of the movable contact piece 31, which is provided with movable contact points 32, extend out of the limiting groove 51 respectively. The middle side of the movable contact piece 31 is bent to provide a positioning piece 33. The positioning piece 33 is provided with a positioning hole, and the positioning piece 33 is sleeved on the positioning post 52 through the positioning hole. The push rod 5 is also provided with a positioning groove 53 that communicates with the limiting groove 51. The positioning post 52 is disposed in the positioning groove 53, and the positioning piece 33 of the movable conductive component 3 is located in the positioning groove 53 of the push rod 5.

[0051] like Figure 5 , Figure 7 As shown in the diagram, the voltage isolation device 100 of this embodiment has the following layout: the outer casing 1 of the device is provided with a groove 107; the push rod 5 is slidably disposed within the groove 107; the two static conductive elements 2 of the wiring assembly 200 are located on both sides of the width direction of the groove 107; the knob rod 4 is located on one side of the length direction of the groove 107; and the elastic element 6 is located within the groove 107, on the side of the push rod 5 away from the knob rod 4. The length direction of the groove 107 is also the sliding direction of the push rod 5. The two static conductive elements 2 of the wiring assembly 200 are arranged on opposite sides of the push rod 5, and the elastic element 6 and the knob rod 4 are arranged on the other opposite sides of the push rod 5, resulting in a reasonable and compact layout that reduces the size of the voltage isolation device 100.

[0052] The elastic element 6 is preferably a compression spring, connected between the push rod 5 and the device housing 1. The push rod 5 has a first spring groove at its bottom end away from the knob rod 4. The bottom wall of the slide groove 107 of the device housing 1 has a second spring groove 111 opposite to the first spring groove. The first spring groove and the second spring groove 111 are semi-circular grooves. A limiting post 112 is provided on the side wall of the slide groove 107 away from the knob rod 4. The elastic element 6 is placed in the first spring groove of the push rod 5 and the second spring groove 111 of the device housing 1, with one end abutting against the side wall of the first spring groove and the other end sleeved on the limiting post 112. Of course, the elastic element 6 can also be a tension spring, leaf spring, etc.

[0053] like Figure 3 , Figure 5 and Figure 11 As shown, the specific structure of the knob rod 4 in this embodiment is as follows: the knob rod 4 is a round rod structure, and the two ends of the knob rod 4 are an operation part 41 and a rotation part 43, respectively. The middle part of the knob rod 4 has a radially protruding driving part 42. The driving part 42 has a pushing surface 421 at the top, a first side stop surface 422 and a second side stop surface 423 on both sides.

[0054] The device housing 1 has a second through hole 102 for the operating part 41 to pass through and a rotating hole 108 for rotatably engaging with the rotating part 43. The first through hole 101 and the second through hole 102 are located on opposite sides of the device housing 1, that is, the second through hole 102 is located on the cover 12 of the device housing 1. Correspondingly, the circuit breaker housing 7 has an operating hole corresponding to the operating part 41. The operating part 41 of the knob lever 4 passes through the second through hole 102 of the device housing 1 and the operating hole of the circuit breaker housing 7 in sequence. The device housing 1 has a first stop part 109 and a second stop part 110 located on both sides of the rotating hole 108. The rotation limit of the drive part 42 is located between the first stop part 109 and the second stop part 110. Figure 7 As shown, when the knob lever 4 is rotated from the second position to the first position, the first side stop surface 422 of the knob lever 4 drive part 42 abuts against the first stop part 109 of the device housing 1; as Figure 8 As shown, when the knob lever 4 is rotated from the first position to the second position, the second side stop surface 423 of the knob lever 4 drive part 42 abuts against the second stop part 110 of the device housing 1.

[0055] like Figure 1 , Figure 2 , Figure 7 As shown, the circuit breaker is a multi-phase circuit breaker, that is, multiple first terminals 81 arranged in a row are provided on one side of the circuit breaker housing 7, and multiple second terminals 82 arranged in a row are provided on the other side of the circuit breaker housing 7; correspondingly, multiple sets of wiring assemblies 200 are provided, and the multiple sets of wiring assemblies 200 are spaced apart in the device housing 1 along the sliding direction of the push rod 5. The switching mechanism is provided with multiple moving conductive elements 3 corresponding to the multiple sets of wiring assemblies 200, and the multiple moving conductive elements 3 are spaced apart on the push rod 5 along the sliding direction of the push rod 5.

[0056] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0057] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. Circuit breaker voltage isolation structure comprising a circuit breaker housing (7), a circuit breaker body assembly installed in the circuit breaker housing (7), a controller (9) and a voltage isolation device (100), the circuit breaker body assembly being provided with a first wiring terminal (81) and a second wiring terminal (82) located at opposite sides of the circuit breaker housing (7), characterized in that: The voltage isolation device (100) includes a device housing (1), a switching mechanism installed inside the device housing (1), and at least one set of wiring assemblies (200). The device housing (1) is directly fixed to the circuit breaker housing (7). The wiring assembly (200) includes two stationary conductive elements (2) spaced apart. Each stationary conductive element (2) has a wiring portion (21). The device housing (1) has a first through hole (101) for the wiring portion (21) to pass through. The wiring portion (21) of one of the stationary conductive elements (2) in the wiring assembly (200) The circuit breaker body assembly is electrically connected to the second terminal (82), and the wiring part (21) of another static conductive element (2) is electrically connected to the controller (9); the switching mechanism includes a moving conductive element (3) corresponding to the wiring assembly (200). The moving conductive element (3) can move between the disconnect position and the conduction position. When the moving conductive element (3) moves to the disconnect position, it disconnects the two static conductive elements (2) of the corresponding wiring assembly (200). When the moving conductive element (3) moves to the conduction position, it conducts the two static conductive elements (2) of the corresponding wiring assembly (200).

2. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The controller (9) is located above the first terminal (81) of the circuit breaker body assembly, the voltage isolation device (100) is located above the second terminal (82) of the circuit breaker body assembly, and the first through hole (101) is provided on the bottom side of the device housing (1).

3. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The outer casing (1) of the device is provided with creepage ribs (103) and / or creepage grooves (104) on the outer side of the side where the first perforation (101) is located.

4. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The static conductive component (2) includes a static contact piece (22), the two ends of which are fixed on the outer shell (1) of the device. A static contact point (23) that cooperates with the moving conductive component (3) is provided on one side of the middle part of the static contact piece (22). A sheet-like wiring portion (21) is provided on the side of the static contact piece (22).

5. The circuit breaker voltage isolation structure according to claim 4, characterized in that: The device housing (1) is provided with two slots (105) that respectively cooperate with the two ends of the stationary contact piece (22), and a limiting plate (106) connected between the side walls of the two slots (105). The two ends of the stationary contact piece (22) are respectively inserted and fixed in the slots (105), and the side of the stationary contact piece (22) facing away from the stationary contact point (23) is in contact with the limiting plate (106).

6. The circuit breaker voltage isolation structure according to claim 1, characterized in that: The switching mechanism also includes a knob (4), a push rod (5), and an elastic element (6). The movable conductive element (3) is fixed on the push rod (5). The push rod (5) is linearly slidably mounted on the device housing (1). The knob (4) is provided with a drive part (42). The knob (4) is rotatably mounted on the device housing (1) and can rotate between a first position and a second position. When the knob (4) rotates from the first position to the second position, the drive part (42) drives the push rod (5) to slide against the force of the elastic element (6). The sliding of the push rod (5) causes the movable conductive element (3) to move from the conducting position to the disconnected position. When the knob (4) rotates from the second position to the first position, it drives the drive part (42) to avoid the push rod (5), so that the push rod (5) slides under the force of the elastic element (6). The sliding of the push rod (5) causes the movable conductive element (3) to move from the disconnected position to the conducting position.

7. The circuit breaker voltage isolation structure according to claim 6, characterized in that: The moving conductive component (3) includes a moving contact piece (31), the middle part of which is fixed on the push rod (5). The two ends of the moving contact piece (31) are respectively provided with moving contacts (32), which are respectively arranged opposite to the two static conductive components (2) of the corresponding wiring assembly (200).

8. The circuit breaker voltage isolation structure according to claim 7, characterized in that: The push rod (5) is provided with a limiting groove (51) and a positioning post (52). The middle part of the movable contact piece (31) is limited in the limiting groove (51) of the push rod (5). The movable contact piece (31) is provided with two ends of the movable contact point (32) extending out of the limiting groove (51). The middle side of the movable contact piece (31) is bent to provide a positioning piece (33). The positioning piece (33) is provided with a positioning hole. The positioning piece (33) is sleeved on the positioning post (52) through the positioning hole.

9. The circuit breaker voltage isolation structure according to claim 6, characterized in that: The outer casing (1) of the device is provided with a slide groove (107), the push rod (5) is slidably disposed in the slide groove (107), the two static conductive parts (2) of the wiring assembly (200) are located on both sides of the width direction of the slide groove (107), the knob rod (4) is located on one side of the length direction of the slide groove (107), and the elastic element (6) is located in the slide groove (107) and on the side of the push rod (5) away from the knob rod (4).

10. The circuit breaker voltage isolation structure according to claim 6, characterized in that: The housing (1) of the device is provided with a first stop (109) and a second stop (110), and the rotation limit of the drive unit (42) is located between the first stop (109) and the second stop (110).

Images