Multi-pole circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a multi-pole circuit breaker which comprises a shell, a handle series connection shaft and a button series connection structural member, and the central axis of the handle series connection shaft is parallel to the extending direction of the button series connection structural member; a plurality of rotating handles are arranged in the shell, are arranged on a handle series connection shaft in a sleeving manner at intervals and can rotate around the central axis; and one side of each operation button is provided with a rotary connecting part, and the other corresponding side of each operation button is connected with the button series connection structural member. According to the invention, the plurality of operation buttons are connected in series, so that the synchronous movement of the plurality of operation buttons can be realized, the angle difference of the operation buttons during switching-on can be eliminated, and the consistency of actions is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a multi-pole circuit breaker. Background Art

[0002] In order to implement the conversion between the conventional power supply and the backup power supply in the power consumption system, a two-pole circuit breaker (2P), a three-pole circuit breaker (3P), a four-pole circuit breaker (4P) and other conversion switches are usually configured. Taking the four-pole circuit breaker as an example, since each switch unit of the four-pole circuit breaker has an operating button, there are four operating buttons on the four-pole circuit breaker. In the prior art, when performing the closing operation, the four operating buttons are actuated by a multi-pole linked long axis, and the consistency of the closing action is poor. There will be an angle difference between the closing poles, resulting in asynchronous closing or failure to close the switch, making the upper surfaces of the ends of the four operating buttons uneven and unsightly. Utility Model Content

[0003] The purpose of the present application is to provide a multi-pole circuit breaker, which can realize synchronous movement of multiple operating buttons by connecting multiple operating buttons in series, eliminate the angle difference of the operating buttons when closing the circuit, and ensure the consistency of the action.

[0004] The embodiment of the present application is implemented as follows:

[0005] An embodiment of the present application provides a multi-pole circuit breaker, comprising a shell, a handle series shaft and a button series structure, wherein the central axis of the handle series shaft is parallel to the extension direction of the button series structure; a plurality of rotating handles are arranged in the shell, and the plurality of rotating handles are spaced apart and sleeved on the handle series shaft and can rotate around the central axis; and a plurality of operating buttons are also included, respectively linked to the rotating handles, wherein one side of the operating button has a rotating connection portion, and the other side thereof is connected to the button series structure.

[0006] As an optional implementation, the operation button is provided with a slot on the surface away from the rotating connection part, and the button serial structure is provided with buckles corresponding to the slots at intervals in the extension direction, and the buckles are engaged with the slots.

[0007] As an optional implementation, the edge of the operation button away from the rotation axis has a first contact surface with the slot provided thereon, and the button series structure is fittedly connected to the first contact surface;

[0008] Alternatively, the edge of the operating button away from the rotation axis has a first contact surface and a second contact surface with a preset angle; the slot is opened on either the first contact surface or the second contact surface, and the button series structure is simultaneously fitted and connected to the first contact surface and the second contact surface.

[0009] As an optional implementation, the cross-section of the strip-shaped structural member is a U-shaped structure, and a slide groove is formed on the U-shaped structure; and a snap-in strip that cooperates with the slide groove is provided on the operation button.

[0010] As an optional implementation, the button series structure is a strip-shaped structure, and the extension direction is parallel to the rotation axis.

[0011] As an optional implementation, the card slot is provided with a first hook, and the buckle is provided with a second hook, and the second hook is hooked with the first hook to form a force to prevent the buckle from escaping from the card slot.

[0012] As an optional embodiment, it further includes a series shaft, the operation button has a through hole extending in a direction parallel to the central axis, and the series shaft is sequentially inserted into the through hole.

[0013] As an optional implementation, the series shaft is connected to the button series structure to form a whole.

[0014] As an optional implementation, limit snap-in grooves are provided at both ends of the through hole, and limit snap-in parts are provided at both ends of the series shaft. The limit snap-in parts cooperate with the limit snap-in grooves to form a force that blocks the operation button from moving axially.

[0015] As an optional embodiment, the limit clamping portion has a first abutment portion extending radially along the series axis, and the through hole is provided with a second abutment portion in the same extension direction as the first abutment portion; the first abutment portion abuts against the second abutment portion.

[0016] As an optional implementation, the extension distance of the through hole is greater than the extension distance of the series shaft, so that the end of the series shaft is recessed in the through hole; the two ends of the button series structure are respectively flush with the two ends of the housing of the multi-stage circuit breaker.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The embodiment of the present application discloses a multi-pole circuit breaker, including a housing, a handle series shaft and a button series structure. The central axis of the handle series shaft is parallel to the extension direction of the button series structure. The handle series shaft of the embodiment of the present application is located inside the housing, and the button series structure is located outside the housing. A plurality of rotating handles are arranged in the housing of the embodiment of the present application. The plurality of rotating handles are spaced and sleeved on the handle series shaft and can rotate around the central axis. The embodiment of the present application can connect the plurality of rotating handles in series through the handle series shaft to ensure the consistency of the rotation axis of the rotating handles. Compared with the prior art, the embodiment of the present application also includes a plurality of operating buttons respectively linked with the rotating handles, one side of the operating button has a rotating connection part, and the other side correspondingly is connected to the button series structure. The embodiment of the present application connects the plurality of operating buttons in series through the button series structure, so that the plurality of operating buttons can have consistent actions when opening and closing the switch, and the consistent actions of the operating buttons drive the plurality of rotating handles to act simultaneously, so as to avoid the angle difference between the closing poles of the multi-pole circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of a multi-pole circuit breaker according to an embodiment of the present application;

[0021] Figure 2 This is the second structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0022] Figure 3 This is the third structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0023] Figure 4 This is the fourth structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0024] Figure 5 This is the fifth structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0025] Figure 6 This is the sixth structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0026] Figure 7 This is the seventh structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0027] Figure 8 This is the eighth structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0028] Fig. 9 This is the ninth structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0029] Fig.10 This is the tenth structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0030] Fig.11 This is the eleventh structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0031] Fig.12 This is the twelfth structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0032] Fig.13 This is the thirteenth structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0033] Fig.14 This is the fourteenth structural diagram of the multi-pole circuit breaker according to the embodiment of the present application;

[0034] Fig.15 This is the fifteenth structural schematic diagram of the multi-pole circuit breaker according to the embodiment of the present application.

[0035] icon:

[0036] 100-multi-pole circuit breaker; 101-housing; 102-handle serial axis; 103-button serial structure; 104-operating button; 105-rotating connection part; 106-slot; 107-clip; 108-L-shaped structure; 109-first contact surface; 110-second contact surface; 111-U-shaped structure; 112-slide; 113-serial axis; 114-through hole; 115-rotating handle; 116-limiting structure; 117-clip strip; 118-first hook; 119-second hook; 120-limiting clamping part; 121-first abutting part; 122-second abutting part; 123-limiting clamping groove. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In order to implement the conversion between the conventional power supply and the backup power supply in the power consumption system, a two-pole circuit breaker (2P), a three-pole circuit breaker (3P), a four-pole circuit breaker (4P) and other conversion switches are usually configured. Taking the four-pole circuit breaker as an example, since each switch unit of the four-pole circuit breaker has an operation button 104, there are four operation buttons 104 on the four-pole circuit breaker. In the prior art, when performing the closing operation, the four operation buttons 104 are actuated by the long axis of the multi-pole linkage, and the consistency of the closing action is poor, and there will be an angle difference between the closing poles, resulting in asynchronous closing or failure to close, so that the upper surfaces of the ends of the four operation buttons 104 are uneven and unsightly.

[0042] In order to solve the above technical problems, an embodiment of the present application provides a multi-pole circuit breaker 100.

[0043] Reference Figure 1 , Figure 2As shown, an embodiment of the present application discloses a multi-pole circuit breaker 100, including a shell 101, a handle series shaft 102 and a button series structure 103, the central axis of the handle series shaft 102 is parallel to the extension direction of the button series structure 103; a plurality of rotating handles 115 are arranged in the shell 101, and the plurality of rotating handles 115 are spaced apart on the handle series shaft 102 and can rotate around the central axis; and a plurality of operating buttons 104 are also included which are respectively linked to the rotating handles 115, and one side of the operating button 104 has a rotating connection part 105, and the other side correspondingly is connected to the button series structure 103.

[0044] It should be noted that the operating button 104 and the rotating handle 115 of the embodiment of the present application are connected by a connecting rod, one end of the connecting rod is hinged to the operating button 104, and the other end is hinged to the rotating handle 115. The operating button 104 can drive the rotating handle 115 to rotate through the connecting rod. The rotating handle 115 can drive the moving contact assembly to move.

[0045] The embodiment of the present application connects multiple operating buttons 104 in series through the button series structure 103, which can ensure the stability of the multiple operating buttons 104 when closing the switch and ensure the consistency of the multiple rotating handles 115 in the closing action.

[0046] Similarly, the embodiment of the present application connects multiple operating buttons 104 in series through the button series structure 103, and through the linkage between the operating buttons 104 and the rotating handles 115, the consistency of the actions of the multiple rotating handles 115 when opening the switch can be ensured.

[0047] It should be noted that the button serial structure 103 and the operating button 104 can be connected via a snap-fit ​​structure, or can be connected in series via shaft-hole cooperation, and this embodiment of the present application does not specifically limit this.

[0048] The embodiment of the present application discloses a multi-pole circuit breaker 100, including a housing 101, a handle series shaft 102, and a button series structure 103. The central axis of the handle series shaft 102 is parallel to the extension direction of the button series structure 103. The handle series shaft 102 of the embodiment of the present application is located inside the housing 101, and the button series structure 103 is located outside the housing 101. A plurality of rotating handles 115 are arranged in the housing 101 of the embodiment of the present application. The plurality of rotating handles 115 are spaced apart and sleeved on the handle series shaft 102 and can rotate around the central axis. The embodiment of the present application can connect the plurality of rotating handles 115 in series through the handle series shaft 102 to ensure the consistency of the rotation axis of the rotating handle 115. Compared with the prior art, the embodiment of the present application also includes a plurality of operating buttons 104 respectively linked with the rotating handle 115. One side of the operating button 104 has a rotating connection portion 105, and the other side correspondingly is connected with the button series structure 103. In the embodiment of the present application, a plurality of operating buttons 104 are connected in series through a button series structure 103, so that the plurality of operating buttons 104 can have consistent actions when opening and closing the circuit breaker. The consistent actions of the operating buttons 104 drive the plurality of rotating handles 115 to act simultaneously, thereby avoiding angle differences between closing poles of the multi-pole circuit breaker 100.

[0049] Reference Figure 3 As shown, as an optional embodiment, the operation button 104 is provided with a slot 106 on the surface on the side away from the rotating connection part 105, and the button series structure 103 is provided with buckles 107 corresponding to the slots 106 at intervals in the extension direction, and the buckles 107 are engaged with the slots 106.

[0050] Furthermore, the operating button 104 of the embodiment of the present application is provided with a slot 106 on the surface away from the rotating connection part 105; the button series structure 103 is engaged with the slot 106 through the buckles 107 arranged at intervals, thereby realizing the snap connection between the button series structure 103 and the operating button 104.

[0051] It should be noted that a plurality of slots 106 may be provided on each operation button 104, and the extending direction of the slots 106 may be arranged parallel to the rotation axis of the rotation connection portion 105 of the operation button 104, or the extending direction of the slots 106 may intersect with the rotation axis space, or may be arranged perpendicularly. Those skilled in the art may select according to their needs and there is no special limitation on this.

[0052] The embodiment of the present application can form a variety of snap-in forms through the above-mentioned settings, so that the operation button 104 and the button series structure 103 can be reliably connected.

[0053] It should be noted that, in the embodiment of the present application, the card slot 106 is arranged on the surface of the operating button 104 away from the rotating connection part 105, that is, located at the edge of the side of the operating button 104 away from the rotating connection part 105. By arranging the button series structure 103 at this position, it not only has a good decorative effect, but also facilitates the staff to directly operate the button series structure 103, easily obtains a large rotation torque, and facilitates the operation of opening and closing.

[0054] It should be noted that an extension arm may be provided on the button series structure 103, and the extension arm extends in a direction perpendicular to the rotation axis of the rotation connection portion 105 and away from the rotation connection portion 105. The button series structure 103 can lengthen the force arm driving the operation button 104 while connecting the operation button 104 in series, thereby facilitating the opening and closing of the multi-pole circuit breaker 100.

[0055] Reference Figure 3 As shown, as an optional implementation, each operation button 104 is provided with at least two card slots 106 .

[0056] The slots 106 may be parallel to each other or may be arranged to intersect with each other.

[0057] It should be noted that the button serial structure 103 is engaged with the slot 106 via the buckles 107 arranged at intervals. The specific shapes of the slot 106 and the buckle 107 can be set by those skilled in the art as required, and are not particularly limited.

[0058] As an optional implementation, the button serial structure 103 is a strip-shaped structure, and the extension direction is parallel to the rotation axis.

[0059] Furthermore, the extension direction of the button series structure 103 of the embodiment of the present application is parallel to the rotation axis, wherein the slot 106 on the operation button 104 is parallel to the rotation axis, and the extension directions of the slots 106 on multiple operation buttons 104 overlap, forming one or two strip grooves extending from one end to the other end of the multi-pole circuit breaker 100. The button series structure 103 can be inserted into the strip groove to realize the series connection of multiple operation buttons 104.

[0060] Reference Fig.13 , Fig.14 as well as Fig.15 As shown, as an optional implementation, the edge of the operating button 104 away from the rotation axis has a first contact surface 109 that fits with the button series structure 103, and the slot 106 is provided on the first contact surface 109.

[0061] The first contact surface 109 is recessed downward from the upper surface of the operation button 104, and the first contact surface 109 and the upper surface of the operation button 104 are parallel to each other, the button series structure 103 is embedded in the recess, and the surface of the button series structure 103 facing away from the first contact surface 109 can be flush with the upper surface of the operation button 104, and the upper surface of the button series structure 103 can be slightly raised compared with the upper surface of the operation button 104 as needed. It should be noted that the card slot 106 is provided on the first contact surface 109, and the card slot 106 can pass through the operation button 104 from the first contact surface 109 as needed.

[0062] Reference Figure 4 as well as Figure 5 As shown, as an optional embodiment, the cross-section of the strip structure is an L-shaped structure 108, and the edge of the operating button 104 away from the rotation axis has a first contact surface 109 and a second contact surface 110; one side of the L-shaped structure 108 is in contact with the first contact surface 109, and the other side is in contact with the second contact surface 110, and the slot 106 is arranged on the first contact surface 109 or the second contact surface 110.

[0063] Furthermore, the cross-section of the strip structure in the embodiment of the present application is an L-shaped structure 108, and the L-shaped structure 108 and the operation button 104 can form a larger contact surface. A snap-fit ​​structure can be provided on the first contact surface 109 and the second contact surface 110, respectively, to facilitate forming a reliable connection structure.

[0064] Reference Figure 6 and Figure 7 As shown, as an optional implementation, the cross section of the strip structure is a U-shaped structure 111 , and a slide groove 112 is formed on the U-shaped structure 111 ; and a clamping strip 117 that cooperates with the slide groove 112 is provided on the operation button 104 .

[0065] Furthermore, the cross section of the strip structure of the embodiment of the present application is a U-shaped structure 111, and a slide groove 112 is formed on the U-shaped structure 111, and the slide groove 112 can extend from one end to the other end of the multi-pole circuit breaker 100. The slide groove 112 of the embodiment of the present application can be engaged with the engaging strip 117 to realize the series connection of multiple operation buttons 104.

[0066] It should be noted that limiting structures 116 are provided at both ends of the slide groove 112 and the U-shaped structure 111 , and the limiting structures 116 can prevent the strip structure from slipping after being inserted into the slide groove 112 , which helps to ensure a stable connection between the strip structure and the operating button 104 .

[0067] Further, see Figure 3As shown, the buckles 107 of the embodiment of the present application are arranged at intervals along the extension direction of the strip structure, the slot 106 has a first hook 118, the buckle 107 is provided with a second hook 119, and the second hook 119 is hooked with the first hook 118 to form a force to prevent the buckle 107 from escaping from the slot 106.

[0068] It should be noted that, refer to Figure 3 As shown, the embodiment of the present application can prevent the buckle 107 from slipping out of the slot 106 by hooking and abutting the first hook 118 and the second hook 119, that is, to achieve the upper and lower direction limitation. Among them, the length of the slot 106 is consistent with the length of the buckle 107, so that the two ends of the slot 106 can block the buckle 107 from sliding along the slot 106, thereby achieving the limitation of the strip structure in the front and rear directions. Among them, the two adjacent buckles 107 can limit the movement of the strip structure in the left and right directions. The first hook 118 on one of the slots 106 can provide a holding force to one side, and the first hook 118 on the other slot 106 can provide a holding force to the other side. Therefore, the embodiment of the present application can reliably install the strip structure through the slot 106 and the buckle 107.

[0069] It should be noted that the width of the card slot 106 is slightly greater than the width of the buckle 107 , so that the buckle 107 can be easily inserted into the card slot 106 .

[0070] Reference Figure 8 As shown, as an optional implementation, it also includes a series shaft 113, and the operation button 104 has a through hole 114 extending in a direction parallel to the rotation axis, and the series shaft 113 is sequentially inserted into the through hole 114.

[0071] Furthermore, the embodiment of the present application also includes a series shaft 113, by providing a through hole 114 parallel to the rotation axis on the operating button 104, and using the series shaft 113 to sequentially penetrate the through holes 114, so that the series shaft 113 extends from one end of the multi-pole circuit breaker 100 to the other end.

[0072] It should be noted that the cooperation between the axial hole formed by the series shaft 113 and the through hole 114 can further improve the consistency of the operation of the operating button 104 and effectively eliminate the difference angle between poles of the multi-pole circuit breaker 100 when closing the circuit.

[0073] As an optional implementation, the serial shaft 113 is connected to the button serial structure 103 to form a whole.

[0074] It should be noted that, refer to Figure 4 , Figure 5 as well as Figure 7As shown, the through hole 114 can be provided with a series shaft 113, and the series shaft 113 and the button series structure 103 can be installed as two structures. That is, the series shaft 113 and the button series structure 103 of the embodiment of the present application can be set as an integral structure, or can be divided into two structures and installed separately.

[0075] Reference Figure 8 and Fig. 9 as well as Fig.10 As shown, the embodiment of the present application is provided with limited clamping grooves 123 at both ends of the through hole 114, and limited clamping parts 120 are provided at both ends of the tandem shaft 113. The limited clamping parts 120 cooperate with the limited clamping grooves 123 to form a force to prevent the operation button 104 from moving axially. The embodiment of the present application can prevent the operation button 104 installed on the tandem shaft 113 from moving axially through the cooperation between the limited clamping parts 120 and the limited clamping grooves 123.

[0076] In the embodiment of the present application, the series shaft 113 and the button series structure 103 are arranged as a whole, so that there is no need to set a limiting structure on the button series structure 103, so that the button series structure 103 can be limited and fixed by the limiting structure on the operating series shaft 113, and the button series structure 103 and the operating button 104 only need to retain a partial abutment area.

[0077] Reference Fig.11 and Fig.12 As shown, further, the limiting clamping portion 120 has a first abutting portion 121 extending radially along the tandem shaft 113, and the through hole 114 is provided with a second abutting portion 122 in the same extension direction as the first abutting portion 121, wherein the first abutting portion 121 abuts against the second abutting portion 122 to achieve radial limiting of the tandem shaft 113, effectively preventing the tandem shaft 113 from rotating in the through hole 114, and further improving the stability of the assembly. It should be noted that there may be two first abutting portions 121, which are respectively arranged on both sides of the axis of the center of the tandem shaft 113, and the stability of the tandem shaft 113 is ensured by the two first abutting portions 121 abutting against the two second abutting portions 122 respectively.

[0078] It should be noted that the serial shaft 113 and the button serial structure 103 can be two separate structures, or can be formed into a whole by injection molding or other processes. Those skilled in the art can make a choice according to their needs. Preferably, the extension distance of the through hole 114 is greater than the extension distance of the serial shaft 113, so that the end of the serial shaft 113 is recessed in the through hole 114.

[0079] The two ends of the button series structure 103 are respectively flush with the two ends of the housing 101 of the multi-stage circuit breaker.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-pole circuit breaker, characterized in that: The invention comprises a housing (101), a handle serial shaft (102) and a button serial structure (103), wherein the central axis of the handle serial shaft (102) is parallel to the extension direction of the button serial structure (103); a plurality of rotating handles (115) are arranged in the housing (101), and the plurality of rotating handles (115) are sleeved on the handle serial shaft (102) at intervals and can rotate around the central axis; and a plurality of operating buttons (104) are also included which are respectively linked to the rotating handles (115), wherein one side of the operating button (104) has a rotating connection portion (105), and the other side thereof is connected to the button serial structure (103).

2. The multi-pole circuit breaker according to claim 1, characterized in that: The operating button (104) is provided with a slot (106) on a surface of a side away from the rotating connection portion (105), and the button serial structure (103) is provided with buckles (107) corresponding to the slots (106) at intervals in the extension direction, and the buckles (107) are engaged with the slots (106).

3. The multi-pole circuit breaker according to claim 2, characterized in that: The edge of the operating button (104) away from the rotation axis has a first contact surface (109) on which the clamping groove (106) is provided, and the button series structure (103) is fitted and connected to the first contact surface (109); Alternatively, the edge of the operating button (104) away from the rotation axis has a first contact surface (109) and a second contact surface (110) with a preset angle; the slot (106) is provided on either the first contact surface (109) or the second contact surface (110), and the button serial structure (103) is simultaneously fitted and connected to the first contact surface (109) and the second contact surface (110).

4. The multi-pole circuit breaker according to claim 1, characterized in that: The button series structural member (103) is a strip-shaped structural member, the cross section of which is a U-shaped structure (111), and a slide groove (112) is formed on the U-shaped structure (111); and a clamping strip (117) is provided on the operating button (104) and is connected to the slide groove (112).

5. The multi-pole circuit breaker according to claim 2, characterized in that: The card slot (106) is provided with a first hook (118), and the buckle (107) is provided with a second hook (119). The second hook (119) is hooked with the first hook (118) to form a force that prevents the buckle (107) from escaping from the card slot (106).

6. The multi-pole circuit breaker according to any one of claims 1 to 5, characterized in that: It also includes a serial shaft (113), the operating button (104) has a through hole (114) extending in a direction parallel to the central axis, and the serial shaft (113) is sequentially inserted into the through hole (114).

7. The multi-pole circuit breaker according to claim 6, characterized in that: The series shaft (113) is connected to the button series structure (103) to form a whole.

8. The multi-pole circuit breaker according to claim 6, characterized in that: The two ends of the through hole (114) are provided with limited clamping grooves (123), and the two ends of the serial shaft (113) are provided with limited clamping parts (120). The limited clamping parts (120) are engaged with the limited clamping grooves (123) to form a force that blocks the operation button (104) from moving along the axial direction.

9. The multi-pole circuit breaker according to claim 8, characterized in that: The position-limiting clamping portion (120) has a first abutting portion (121) extending radially along the series shaft (113), and the through hole (114) is provided with a second abutting portion (122) extending in the same direction as the first abutting portion (121); the first abutting portion (121) abuts against the second abutting portion (122).

10. The multi-pole circuit breaker according to claim 6, characterized in that: The extension distance of the through hole (114) is greater than the extension distance of the series shaft (113), so that the end of the series shaft (113) is recessed in the through hole (114); and the two ends of the button series structure (103) are respectively flush with the two ends of the housing (101) of the multi-stage circuit breaker.

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