Moving contact mechanism and circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a moving contact mechanism and a circuit breaker, and the moving contact mechanism comprises a mechanism seat and a moving contact structure. The mechanism seat is provided with a rotating shaft, and the moving contact structure comprises an installation part and two abutting parts which extend along the radial direction of the rotating shaft. A deflection structure is arranged between the mounting part and the mechanism seat; the rotating axis of the deflection structure is perpendicular to the rotating shaft and is arranged between the two abutting parts; the mechanism seat is driven to drive the moving contact structure to rotate around the rotating shaft to a closing position, and the moving contact structure can move around the rotating axis of the deflection structure, so that the two abutting parts are in contact with the static contact for closing. According to the embodiment of the invention, through deflection of the moving contacts, two sides of the moving contacts at two sides can be contacted and switched on, and the fault rate of the circuit breaker is effectively reduced.

Description

Technical Field

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

[0002] Typically, the moving contact, mechanism base, and torsion spring in a circuit breaker are connected in a coordinated manner, and the handle is linked to the mechanism base via a connecting rod. Over long-term use, the two silver points of the moving contact, which have two silver dots, can wear unevenly. Existing moving contacts lack adaptive left-right deflection. Consequently, when the silver dots wear unevenly, when the moving contact is in the closed position, one silver dot will make contact with the static contact, while the other silver dot will have a gap and prevent contact, leading to a non-conductive state when the circuit breaker is closed. Utility Model Content

[0003] The purpose of the present application is to provide a moving contact mechanism and a circuit breaker, which can make both sides of the moving contacts contact and close through the deflection of the moving contact, thereby effectively reducing the failure rate of the circuit breaker.

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

[0005] In the first aspect, an embodiment of the present application discloses a moving contact mechanism, which is arranged in conjunction with a static contact in a circuit breaker, and the moving contact mechanism includes a mechanism seat and a moving contact structure; a rotating shaft is installed on the mechanism seat, and the moving contact structure includes a mounting portion and two abutment portions extending radially along the rotating shaft; a deflection structure is provided between the mounting portion and the mechanism seat; the rotation axis of the deflection structure is perpendicular to the rotating shaft and is arranged between the two abutment portions; the mechanism seat is driven to drive the moving contact structure to rotate around the rotating shaft to the closed position, and the moving contact structure can move around the rotation axis of the deflection structure so that the two abutment portions contact and close the static contact.

[0006] As an optional embodiment, the mechanism seat has a mounting surface; the deflection structure includes a first deflection structure formed on the mounting surface and protruding toward one side of the mounting portion; the first deflection structure has a first arc surface abutting the surface of the mounting portion.

[0007] As an optional embodiment, the deflection structure includes a second deflection structure formed on the mounting portion and protruding toward one side of the mounting surface; the second deflection structure has a second arc surface abutting against the first arc surface.

[0008] As an optional implementation, the extension directions of the first deflection structure and the second deflection structure are both perpendicular to the rotation axis; the first arc surface and the second arc surface abut to form a contact line.

[0009] As an optional implementation, the first deflection structure or the second deflection structure is a hemispherical structure, and the first arc surface abuts against the second arc surface to form a contact point.

[0010] As an optional embodiment, a snap-in slot is provided on the mounting portion; a snap-in protrusion is provided on the mounting surface and is inserted into the snap-in slot; there is a gap between the inner walls on both sides of the snap-in slot arranged along the extension direction of the rotating shaft and the snap-in protrusion; and the inner wall on one side of the snap-in slot abuts against the snap-in protrusion.

[0011] As an optional embodiment, the mechanism seat forms avoidance inclined surfaces on both sides of the mounting surface, and the two avoidance inclined surfaces are arranged axially symmetrically about the rotation axis of the deflection structure to expand the deflection range of the moving contact structure.

[0012] As an optional embodiment, the snap-fit ​​protrusion has an anti-slip inclined surface on the side close to the rotating shaft; a torsion spring is sleeved on the rotating shaft, the first end of the torsion spring is fixed on the mechanism seat, and the second end of the torsion spring is connected to the moving contact structure; the torsion spring pushes the moving contact structure so that the inner wall of the snap-fit ​​groove abuts against the anti-slip inclined surface.

[0013] As an optional embodiment, the mounting portion is provided with torsion spring mounting grooves located on both sides of the clamping notch, there are two torsion springs, and the second ends of the two torsion springs are respectively inserted into the torsion spring mounting grooves.

[0014] As an optional embodiment, the mounting portion has a first mating surface, and the mechanism seat has a second mating surface in contact with the first mating surface; the moving contact structure and the static contact are closed and abutted against each other, forming a holding thrust to separate the first mating surface from the second mating surface.

[0015] In a second aspect, embodiments of the present application provide a circuit breaker comprising the aforementioned movable contact mechanism, a stationary contact, and an operating handle; the operating handle is provided with a connecting rod connected to the mechanism seat of the movable contact mechanism, and the operating handle drives the mechanism seat to rotate via the connecting rod. There are multiple operating handles arranged in sequence along a straight line; the circuit breaker further comprises a handle sleeve having multiple operating handles connected in series along the linear arrangement direction; the operating handle is provided with at least two engaging grooves spaced apart along the linear arrangement direction on a side surface, with a limiting boss provided between adjacent engaging grooves; the handle sleeve is provided with a buckle that engages with the engaging groove, the buckle abutting the limiting boss to generate a force that prevents the handle sleeve from moving along the linear arrangement direction.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] First, a movable contact mechanism in an embodiment of the present invention is configured to cooperate with a stationary contact in a circuit breaker. The movable contact mechanism includes a mechanism base and a movable contact structure. A rotating shaft is mounted on the mechanism base, and the mechanism base is driven to rotate the movable contact structure about the rotating shaft to achieve closing and opening. The movable contact structure in this embodiment of the present invention includes a mounting portion and two abutment portions extending radially along the rotating shaft, wherein the abutment portions are connected to the mounting portion. A deflection structure is provided between the mounting portion and the mechanism base. The rotation axis of the deflection structure is perpendicular to the rotating shaft and is disposed between the two abutment portions. The mechanism base is driven to rotate the movable contact structure about the rotating shaft to a closed position. The movable contact structure, subjected to the deflection force generated by the closing contact collision, can move about the rotation axis of the deflection structure, causing both abutment portions to contact the stationary contact, thereby closing the circuit. Compared to the prior art, the movable contact structure with two abutment portions provided in this embodiment of the present invention maintains stable contact with the stationary contact during closing, even after wear, avoiding the problem of abutment on one side and gap on the other. Therefore, the embodiment of the present application can ensure the reliability of closing the moving contact mechanism and effectively reduce the failure rate.

[0018] In a second aspect, embodiments of the present application provide a circuit breaker comprising the aforementioned movable contact mechanism, a stationary contact, and an operating handle; the operating handle is provided with a connecting rod connected to the mechanism base of the movable contact mechanism, and the operating handle drives the mechanism base to rotate via the connecting rod. The circuit breaker provided in embodiments of the present application utilizes the aforementioned movable contact mechanism, which, through the deflection of the movable contact, enables both sides of the movable contacts to contact and close the circuit breaker, effectively reducing the failure rate of the circuit breaker, ensuring stable closing of the circuit breaker, and improving the reliability of the circuit breaker closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is one of the structural diagrams of the moving contact mechanism of an embodiment of the present application;

[0021] Figure 2 This is the second structural diagram of the moving contact mechanism of the embodiment of the present application;

[0022] Figure 3 This is the third structural diagram of the moving contact mechanism of the embodiment of the present application;

[0023] Figure 4 This is the fourth structural diagram of the moving contact mechanism of the embodiment of the present application;

[0024] Figure 5This is the fifth structural diagram of the moving contact mechanism of the embodiment of the present application;

[0025] Figure 6 This is the sixth structural diagram of the moving contact mechanism of the embodiment of the present application;

[0026] Figure 7 This is one of the structural diagrams of the movable handle cover according to an embodiment of the present application;

[0027] Figure 8 This is the second structural diagram of the movable handle cover according to the embodiment of the present application;

[0028] Figure 9 This is the third structural diagram of the movable handle cover according to the embodiment of the present application.

[0029] icon:

[0030] 100-mechanism seat; 101-moving contact structure; 102-rotating shaft; 103-mounting part; 104-abutting part; 105-mounting surface; 106-first deflection structure; 107-second deflection structure; 109-clamping slot; 110-clamping protrusion; 111-avoidance inclined surface; 112-anti-slip inclined surface; 113-torsion spring; 114-torsion spring mounting slot; 115-first fitting surface; 116-second fitting surface; 117-operating handle; 118-handle cover; 119-clamping slot; 120-limiting boss; 121-clip. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] 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 protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," "third," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0034] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] Typically, the moving contact, mechanism base 100, and torsion spring 113 in a circuit breaker are connected in a coordinated manner, and the handle is then linked to the mechanism base 100 via a connecting rod. Over long-term use, the two silver points of the moving contact, which have two silver dots, can wear unevenly. However, the moving contact provided by existing technologies cannot adaptively deflect left and right. Therefore, when the silver dots on the left and right sides wear unevenly, when the moving contact is in the closed position, one silver dot will make contact with the static contact, while the other silver dot will have a gap and not make contact with the static contact, resulting in a non-conduction problem when the circuit breaker is closed.

[0036] To solve the above technical problems, embodiments of the present application provide a moving contact mechanism and a circuit breaker.

[0037] Reference Figure 1 As shown, an embodiment of the present application discloses a moving contact mechanism, which is arranged in conjunction with a static contact in a circuit breaker, and the moving contact mechanism includes a mechanism base 100 and a moving contact structure 101; a rotating shaft 102 is installed on the mechanism base 100, and the moving contact structure 101 includes a mounting portion 103 and two abutment portions 104 extending radially along the rotating shaft 102; a deflection structure is provided between the mounting portion 103 and the mechanism base 100; the rotation axis of the deflection structure is perpendicular to the rotating shaft 102 and is arranged between the two abutment portions 104; the mechanism base 100 is driven to drive the moving contact structure 101 to rotate around the rotating shaft 102 to the closed position, and the moving contact structure 101 can move around the rotation axis of the deflection structure to make the two abutment portions 104 contact with the static contact to close the circuit.

[0038] The moving contact mechanism of the embodiment of the present application is arranged in conjunction with the static contact in the circuit breaker. The moving contact mechanism includes a mechanism base 100 and a moving contact structure 101. A rotating shaft 102 is installed on the mechanism base 100 of the embodiment of the present application. The mechanism base 100 can be driven to drive the moving contact structure 101 to rotate around the rotating shaft 102 to achieve closing and opening.

[0039] It should be noted that the mechanism base 100 of the present embodiment is driven to rotate about the rotating shaft 102. The mechanism base 100 can be connected to a drive module within the circuit breaker housing. The drive module drives the mechanism base 100 to rotate through a linkage mechanism, thereby achieving the opening and closing movement of the moving contact structure 101. The rotation of the mechanism base 100 can also be controlled by an operating handle 117 mounted on the circuit breaker housing.

[0040] The moving contact structure 101 of the embodiment of the present application includes a mounting portion 103 and two abutting portions 104 extending radially along the rotation shaft 102 , wherein the abutting portions 104 are connected to the mounting portion 103 .

[0041] It should be noted that two abutment portions 104 are provided on the moving contact structure 101 of the embodiment of the present application, wherein the abutment portion 104 can be a metal structural member integrally formed with the mounting portion 103, or a metal structural member fixed to the mounting portion 103 by connecting members such as bolts.

[0042] In the embodiment of the present application, a deflection structure is provided between the mounting portion 103 and the mechanism base 100 ; the rotation axis of the deflection structure is perpendicular to the rotation shaft 102 and is arranged between the two abutting portions 104 .

[0043] It should be noted that the deflection structure of the embodiment of the present application is essentially a rotating structure, arranged in the middle of the mounting portion 103, that is, between the two abutting portions 104. During closing, when the silver point provided on one abutting portion 104 contacts the static contact, if the silver point on the other abutting portion 104 cannot contact the static contact due to wear, the movable contact structure 101 will deflect as a whole due to the provision of the deflection structure, thereby eliminating the gap on one side that cannot be contacted, so that the silver points on both abutting portions 104 contact the static contact, and closing the circuit breaker is achieved.

[0044] Specifically, the mechanism seat 100 is driven to drive the moving contact structure 101 to rotate around the rotating shaft 102 to the closed position. After the moving contact structure 101 is subjected to the deflection force generated by the closing contact collision, it can move around the rotation axis of the deflection structure, so that both abutment parts 104 contact with the static contact to close the circuit.

[0045] Compared to the prior art, the movable contact structure 101 with dual abutment portions 104 provided in the present embodiment can maintain stable contact with the static contact during closing even after wear, avoiding the problem of abutment on one side and gap on the other. Therefore, the present embodiment can ensure the reliability of the movable contact mechanism during closing and effectively reduce the failure rate.

[0046] Reference Figure 2As shown, as an optional embodiment, the mechanism seat 100 has a mounting surface 105; the deflection structure includes a first deflection structure 106 formed on the mounting surface 105 and protruding toward one side of the mounting portion 103; the first deflection structure 106 has a first arc surface that abuts against the surface of the mounting portion 103.

[0047] It should be noted that the mechanism base 100 of the embodiment of the present application has a mounting surface 105 that mates with the mounting portion 103 of the movable contact structure 101. In the embodiment of the present application, a protrusion is formed on the mounting surface 105 as a first deflection structure 106. It should be noted that the embodiment of the present application mainly forms a deflection and rotation structure by forming the surface of the first deflection structure 106 as a first arc surface.

[0048] The mounting portion 103 of the moving contact structure 101 abuts against the first arc surface to form line contact.

[0049] It should be noted that, at this point, the deflection axis 102 of the movable contact structure 101 is the contact line between the mounting portion 103 and the first arc surface, and the movable contact structure 101 can deflect about this contact line. Furthermore, during the deflection process of the movable contact structure 101, the contact line shifts along the first arc surface, ensuring that the movable contact structure 101 always maintains a contact line with the first arc surface during deflection.

[0050] Reference Figure 3 As shown, as an optional embodiment, the deflection structure includes a second deflection structure 107 formed on the mounting portion 103 and protruding toward the mounting surface 105; the second deflection structure 107 has a second arc surface abutting against the first arc surface.

[0051] Furthermore, based on the above embodiment, in the embodiment of the present application, a protruding second deflection structure 107 is formed on the mounting portion 103 of the moving contact structure 101 , and a second arc surface is formed on the second deflection structure 107 .

[0052] For example, refer to Figure 5 、 Figure 6 As shown, the first deflection structure 106 and the second deflection structure 107 are semi-cylindrical structures whose extension directions are perpendicular to the rotation axis 102; the first arc surface and the second arc surface abut to form a contact line.

[0053] For example, the first deflection structure 106 is a hemispherical structure, which contacts the second arc surface to form a contact point. It should be noted that the formation of the above contact points and contact lines enables the movable contact structure 101 to deflect flexibly with less deflection resistance.

[0054] Reference Figure 2 、 Figure 3As shown, as an optional embodiment, a snap-fitting notch 109 is provided on the mounting portion 103; a snap-fitting protrusion 110 is provided on the mounting surface 105 and is inserted into the snap-fitting notch 109; and a gap is formed between the inner walls of the snap-fitting notch 109 on both sides arranged along the extending direction of the rotating shaft 102 and the snap-fitting protrusion 110;

[0055] The inner wall of the locking notch 109 close to the rotating shaft 102 abuts against the locking protrusion 110 .

[0056] In another embodiment, the inner walls of the snap-fitting notch 109 arranged along the rotation axis of the deflection structure abut against the snap-fitting protrusion 110 to achieve a more stable snap-fitting connection structure.

[0057] Furthermore, the embodiment of the present application discloses a connection structure between the moving contact structure 101 and the mechanism base 100 .

[0058] In the embodiment of the present application, a snap-fitting notch 109 is provided on the mounting portion 103 , and a snap-fitting protrusion 110 inserted into the snap-fitting notch 109 is provided on the mounting surface 105 , so that the moving contact structure 101 is snap-fitted with the mechanism base 100 .

[0059] It should be noted that in the embodiment of the present application, the inner walls of the engaging notch 109 arranged along the extension direction of the rotating shaft 102 have a gap with the engaging protrusion 110. In other words, this gap allows the engaging structure to be achieved without restricting the deflection and tilting of the movable contact structure 101. The engaging structure provided in the embodiment of the present application does not restrict the deflection direction of the movable contact structure 101. The inner walls of the engaging notch 109 arranged along the rotation axis of the deflection structure abut against the engaging protrusion 110.

[0060] Reference Figure 2 、 Figure 4 As shown, as an optional embodiment, the mechanism seat 100 forms avoidance inclined surfaces 111 on both sides of the mounting surface 105, and the two avoidance inclined surfaces 111 are axially symmetrically arranged about the rotation axis of the deflection structure to expand the deflection range of the moving contact structure 101.

[0061] Furthermore, in the embodiment of the present application, avoidance inclined surfaces 111 are formed on both sides of the mounting surface 105 of the mechanism base 100 , so that the moving contact structure 101 can obtain a larger deflection range during deflection without interfering or colliding with the mechanism base 100 .

[0062] Reference Figure 2 、 Figure 4As shown, as an optional embodiment, the snap-fit ​​protrusion 110 has an anti-slip inclined surface 112 on the side close to the rotating shaft 102; a torsion spring 113 is sleeved on the rotating shaft 102, and the first end of the torsion spring 113 is fixed on the mechanism base 100, and the second end of the torsion spring 113 is connected to the moving contact structure 101; the torsion spring 113 pushes the moving contact structure 101 so that the inner wall of the snap-fit ​​groove 109 abuts against the anti-slip inclined surface 112.

[0063] In the embodiment of the present application, an anti-slip inclined surface 112 is provided on the side of the engaging protrusion 110 near the rotating shaft 102 to prevent the mounting portion 103 from separating from the mechanism base 100. In the embodiment of the present application, a torsion spring 113 is used to press the movable contact structure 101, so that the inner wall of the engaging notch 109 of the mounting portion 103 abuts against the anti-slip inclined surface 112. Due to the inclined structure of the anti-slip inclined surface 112, it can effectively prevent the inner wall of the engaging notch 109 and the engaging protrusion 110 from slipping, thereby achieving a reliable connection between the mechanism base 100 and the movable contact structure 101.

[0064] Reference Figure 2 、 Figure 3 As shown, the mounting portion 103 is provided with torsion spring mounting grooves 114 located on both sides of the engaging groove 109 , there are two torsion springs 113 , and the second ends of the two torsion springs 113 are respectively inserted into the torsion spring mounting grooves 114 .

[0065] As an optional embodiment, the mounting portion 103 has a first fitting surface 115, referring to Figure 6 As shown, the mechanism seat 100 has a second fitting surface 116 in contact with the first fitting surface 115; the moving contact structure 101 and the static contact are closed and abutted against each other, forming a resisting thrust to separate the first fitting surface 115 from the second fitting surface 116, as shown in FIG. Figure 5 shown.

[0066] Furthermore, the embodiment of the present application also forms a first fitting surface 115 on the mounting portion 103 that fits with the mechanism base 100. It should be noted that the moving contact structure 101 and the static contact are closed and abutted against each other, forming a thrust force that separates the first fitting surface 115 from the second fitting surface 116, so that the moving contact structure 101 can deflect under the action of the deflection structure. When the contact is in the closed state, under the pressing force of the torsion spring 113, the first fitting surface 115 and the second fitting surface 116 fit together, forming a surface-to-surface contact between the moving contact structure 101 and the mechanism base 100, so that the moving contact structure 101 will not swing in the open state due to the setting of the deflection structure.

[0067] The deflection structure, the engaging structure formed by the engaging protrusion 110 and the engaging groove, and the engaging contact portion between the first engaging surface 115 and the second engaging surface 116 are sequentially arranged in a direction away from the rotation axis 102 .

[0068] An embodiment of the present application provides a circuit breaker, comprising the above-mentioned moving contact mechanism, static contact and operating handle 117; the operating handle 117 is provided with a connecting rod connected to the mechanism base 100 of the moving contact mechanism, and the operating handle 117 drives the mechanism base 100 to rotate through the connecting rod.

[0069] The circuit breaker provided in the embodiment of the present application adopts the above-mentioned moving contact mechanism, which can make both sides of the moving contacts contact and close through the deflection of the moving contact, effectively reducing the failure rate of the circuit breaker, ensuring stable closing of the circuit breaker, and improving the reliability of the circuit breaker closing.

[0070] Reference Figure 7 、 Figure 8 As shown, as an optional embodiment, there are multiple operating handles 117 and they are arranged in sequence along a straight line; and also includes a handle cover 118 that connects multiple operating handles 117 in series along the straight line arrangement direction.

[0071] Reference Figure 9 As shown, the side of the operating handle 117 is provided with at least two snap-in grooves 119 arranged at intervals along the straight arrangement direction, and a limiting boss 120 is provided between adjacent snap-in grooves 119; the handle cover 118 is provided with a buckle 121 corresponding to the snap-in groove 119, and the buckle 121 abuts against the limiting boss 120, generating a force that prevents the handle cover 118 from moving along the straight arrangement direction.

[0072] It should be noted that the embodiment of the present application provides multiple operating handles 117, which are connected in series via a handle sleeve 118. When the handle sleeve 118 connects multiple operating handles 117 in series, the handle sleeve 118 is provided with a buckle 121 at a position corresponding to each operating handle 117, which can be correspondingly engaged with a buckle groove 119 provided on the operating handle 117.

[0073] It should be noted that after the buckle 121 is engaged with the engaging groove 119 , one side surface of the buckle 121 can abut against the limiting boss 120 , thereby forming a holding force to prevent the operating handle 117 and the handle sleeve 118 from generating lateral relative movement.

[0074] More preferably, a snap-fit ​​groove 119 and a limiting boss 120 are provided on both sides of the corresponding operating handle 117, so that the handle sleeve 118 clamps and engages the opposite sides of the operating handle 117, which is beneficial to improving the stability of the assembly of the handle sleeve 118 and the operating handle 117.

[0075] Furthermore, an axial hole is provided in the operating handle, through which multiple operating handles can be inserted through a metal shaft, thereby providing strength for the series connection of multiple operating handles. For example, a metal shaft and a handle sleeve 118 can be inserted through the four operating handles of a 4P circuit breaker to facilitate synchronous opening and closing control of multiple operating handles 117.

[0076] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A moving contact mechanism, arranged in conjunction with a static contact in a circuit breaker, characterized in that: The movable contact mechanism comprises a mechanism seat (100) and a movable contact structure (101); a rotating shaft (102) is mounted on the mechanism seat (100); the movable contact structure (101) comprises a mounting portion (103) and two abutting portions (104) extending radially along the rotating shaft (102); a deflection structure is provided between the mounting portion (103) and the mechanism seat (100); the rotation axis of the deflection structure is perpendicular to the rotating shaft (102) and is arranged between the two abutting portions (104); the mechanism seat (100) is driven to drive the movable contact structure (101) to rotate around the rotating shaft (102) to a closing position, and the movable contact structure (101) can move around the rotation axis of the deflection structure so that the two abutting portions (104) contact and close with the static contact.

2. The moving contact mechanism according to claim 1, characterized in that: The mechanism seat (100) has a mounting surface (105); the deflection structure includes a first deflection structure (106) formed on the mounting surface (105) and protruding toward one side of the mounting portion (103); the first deflection structure (106) has a first arc surface abutting against the surface of the mounting portion (103).

3. The moving contact mechanism according to claim 2, characterized in that: The deflection structure comprises a second deflection structure (107) formed on the mounting portion (103) and protruding toward one side of the mounting surface (105); the second deflection structure (107) has a second arc surface abutting against the first arc surface.

4. The moving contact mechanism according to claim 3, characterized in that: The first deflection structure (106) and the second deflection structure (107) extend in directions perpendicular to the rotation axis (102); the first arc surface and the second arc surface abut against each other to form a contact line.

5. The moving contact mechanism according to claim 3, characterized in that: A snap-fitting notch (109) is provided on the mounting portion (103); a snap-fitting protrusion (110) is provided on the mounting surface (105) and is inserted into the snap-fitting notch (109); a gap exists between the inner walls of the snap-fitting notch (109) on both sides arranged along the extending direction of the rotating shaft (102) and the snap-fitting protrusion (110); and the inner wall of the snap-fitting notch (109) on the side close to the rotating shaft (102) abuts against the snap-fitting protrusion (110).

6. The moving contact mechanism according to claim 3, characterized in that: The mechanism seat (100) forms avoidance inclined surfaces (111) on both sides of the mounting surface (105); the two avoidance inclined surfaces (111) are arranged axially symmetrically about the rotation axis of the deflection structure, and are used to expand the deflection range of the moving contact structure (101).

7. The moving contact mechanism according to claim 5, characterized in that: The engaging protrusion (110) has an anti-slip inclined surface (112) on one side close to the rotating shaft (102); a torsion spring (113) is sleeved on the rotating shaft (102); a first end of the torsion spring (113) is fixed to the mechanism seat (100), and a second end of the torsion spring (113) is connected to the moving contact structure (101); the torsion spring (113) pushes the moving contact structure (101) so that the inner wall of the engaging notch (109) abuts against the anti-slip inclined surface (112).

8. The moving contact mechanism according to claim 7, characterized in that: The mounting portion (103) is provided with torsion spring mounting grooves (114) located on both sides of the clamping groove (109), there are two torsion springs (113), and the second ends of the two torsion springs (113) are respectively inserted into the torsion spring mounting grooves (114).

9. The moving contact mechanism according to any one of claims 1 to 8, characterized in that: The mounting portion (103) has a first fitting surface (115), and the mechanism seat (100) has a second fitting surface (116) in contact with the first fitting surface (115); the moving contact structure (101) and the static contact are closed and abutted against each other, forming a holding thrust to separate the first fitting surface (115) and the second fitting surface (116).

10. A circuit breaker, characterized in that: The invention comprises a moving contact mechanism, a static contact and an operating handle (117) as described in any one of claims 1 to 9; the operating handle (117) is provided with a connecting rod connected to the mechanism seat (100) of the moving contact mechanism, and the operating handle (117) drives the mechanism seat (100) to rotate through the connecting rod; there are multiple operating handles (117) and they are arranged in sequence along a straight line; it also includes a handle cover (118) in which multiple operating handles (117) are connected in series along the straight line arrangement direction; the side surface of the operating handle (117) is provided with at least two clamping grooves (119) arranged at intervals along the straight line arrangement direction, and a limiting boss (120) is provided between adjacent clamping grooves (119); the handle cover (118) is provided with a buckle (121) corresponding to the clamping groove (119), and the buckle (121) abuts against the limiting boss (120) to generate a force that blocks the handle cover (118) from moving along the straight line arrangement direction.

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