A moving contact assembly

Abstract

A movable contact assembly relates to the technical field of electrical equipment. The movable contact assembly comprises a movable contact and a contact support rotating around a rotation axis; the contact support comprises a first limiting slot and a second limiting slot; the movable contact comprises a bent part clamped in the first limiting slot and a body clamped in the second limiting slot, and the first limiting slot and the second limiting slot are used for limiting the movable contact in the radial direction of the rotation axis. The movable contact assembly is convenient to disassemble and assemble, and improves the assembly precision and the stability of the electrical performance.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to a moving contact assembly. Background Technology

[0002] The moving contact is the core moving component in a circuit breaker. Its function is to reliably contact or separate from the stationary contact under the operation of the mechanism, thereby completing the on / off control of the circuit.

[0003] Currently, miniature circuit breakers commonly use hot riveting to fix the moving contacts, which involves rigidly connecting the moving contacts to the contact support components through high-temperature riveting. However, during the hot riveting process, the riveted components are prone to overflow due to material expansion caused by heat, resulting in dimensional deviations or uneven surfaces, affecting assembly accuracy and electrical performance stability. Furthermore, when the moving contacts are damaged, they are difficult to replace individually and require complete disassembly, increasing maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide a moving contact assembly that is easy to disassemble and assemble, and improves assembly accuracy and electrical performance stability.

[0005] The embodiments of this utility model are implemented as follows: In one aspect, this utility model provides a moving contact assembly, including a moving contact and a contact support that rotates about a rotation axis; the contact support includes a first limiting groove and a second limiting groove; the moving contact includes a bent portion that is engaged in the first limiting groove and a body that is engaged in the second limiting groove, the first limiting groove and the second limiting groove being used to limit the moving contact in the radial direction of the rotation axis.

[0006] Optionally, the side wall of the second limiting groove is provided with a limiting buckle, the limiting buckle having a first abutting surface facing the body of the moving contact, the first abutting surface abutting against the axial end face of the body.

[0007] Optionally, the number of limiting buckles is at least one pair, and the pair of limiting buckles are respectively disposed on the opposite side walls of the second limiting groove.

[0008] Optionally, the moving contact assembly also includes a mechanism seat, which is coaxially arranged with the contact support via a rotation shaft, with at least a portion of the moving contact located between the mechanism seat and the contact support, for limiting the moving contact in the axial direction of the rotation shaft.

[0009] Optionally, an elastic element is provided between the mechanism seat and the contact support, the elastic element being used to provide a preload force to the contact support for rotation in the closing direction.

[0010] Optionally, the mechanism seat has a second abutment surface located on the rotation path of the contact support during the opening of the moving contact and the stationary contact; the contact support has a first limiting surface corresponding to the second abutment surface, and when the moving contact and the stationary contact are opened, the first limiting surface abuts against the second abutment surface.

[0011] Optionally, the mechanism seat has a second limiting surface, and the contact support has a mating surface facing the mechanism seat. The second limiting surface and the mating surface are mated together so that the second limiting surface covers at least part of the moving contact, which is used to limit the moving contact in the axial direction of the rotating shaft. The mechanism seat also has a mechanism seat surface, and the contact support has a corresponding contact seat surface. The mechanism seat surface and the contact seat surface are engaged and limited to each other, and the moving contact is limited in the radial direction of the rotating shaft.

[0012] Optionally, the mechanism seat has a mounting groove opened along the rotation path in the closing direction, the elastic element is partially disposed in the mounting groove, and one end of the elastic element abuts against the bottom of the mounting groove, and the other end abuts against the contact support.

[0013] Optionally, the bottom of the mounting groove is provided with a first mounting post, and the contact support has a second mounting post protruding toward the first mounting post; one end of the elastic member is sleeved on the outer wall of the first mounting post and the other end is sleeved on the outer wall of the second mounting post.

[0014] Optionally, the second limiting groove includes a first sub-limiting groove and a second sub-limiting groove arranged at an angle, and the body of the moving contact includes a first locking part and a second locking part arranged at an angle, the first locking part being locked in the first sub-limiting groove and the second locking part being locked in the second sub-limiting groove.

[0015] The beneficial effects of this utility model include: This application provides a moving contact assembly, including a moving contact and a contact support rotating about a rotation axis, to achieve contact or separation between the moving contact and the stationary contact of a contact module. The contact support includes a first limiting groove and a second limiting groove. The moving contact includes a bent portion that is engaged in the first limiting groove and a body that is engaged in the second limiting groove. The first and second limiting grooves are used to limit the moving contact radially along the rotation axis. This arrangement restricts the radial movement of the moving contact, ensuring its stable position and preventing radial slippage. This improves the contact stability between the moving contact and the stationary contact, ensuring precise engagement between the moving contact and the stationary contact during operation. Compared to the prior art where the moving contact and contact support are fixed using a hot riveting process, this application uses the first and second limiting grooves to engage different positions of the moving contact, facilitating assembly while ensuring the assembly stability and reliability of the moving contact and contact support. The aforementioned moving contact assembly is easy to disassemble and assemble, improving assembly accuracy and electrical performance stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the moving contact assembly provided in an embodiment of the present utility model; Figure 2 One of the schematic diagrams of the contact support structure of the moving contact assembly provided in the embodiment of this utility model; Figure 3 A second schematic diagram of the contact support structure of the moving contact assembly provided in this embodiment of the utility model; Figure 4 A schematic diagram of the structure of the mechanism seat of the moving contact assembly provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the moving contact of the moving contact assembly provided in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of the base provided in an embodiment of the present utility model.

[0018] Icons: 100 - Moving contact assembly; 110 - Rotating shaft; 120 - Contact support; 120A - First mounting hole; 121 - First limiting groove; 122 - Second limiting groove; 1221 - First sub-limiting groove; 1222 - Second sub-limiting groove; 123 - Limiting buckle; 1231 - First abutment surface; 124 - First limiting surface; 125 - Contact surface; 126 - Second mounting post; 127 - Contact Head seat surface; 130-moving contact; 131-bending part; 132-body; 1321-first snap-fit ​​part; 1322-second snap-fit ​​part; 140-mechanism seat; 140A-second assembly hole; 141-second abutment surface; 142-second limiting surface; 143-mounting groove; 144-first mounting post; 145-mechanism seat surface; 150-elastic element; 201-base; 2011-mounting plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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 when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please refer to Figure 1 , Figure 2 and Figure 5 This embodiment provides a moving contact assembly 100, including a moving contact 130 and a contact support 120 that rotates about a rotation axis 110; the contact support 120 includes a first limiting groove 121 and a second limiting groove 122; the moving contact 130 includes a bent portion 131 that is engaged in the first limiting groove 121 and a body 132 that is engaged in the second limiting groove 122, and the first limiting groove 121 and the second limiting groove 122 are used to limit the moving contact 130 in the radial direction of the rotation axis 110. Specifically, such as Figure 1 and Figure 2 As shown, the moving contact assembly 100 includes a contact support 120 and a moving contact 130. The contact support 120 has a first mounting hole 120A in the middle along the thickness direction, and a rotating shaft 110 passes through the first mounting hole 120A, so that the contact support 120 can rotate about the rotating shaft 110.

[0024] The contact support 120 includes a first mounting surface and a second mounting surface. A first limiting groove 121 is formed on the first mounting surface, and a second limiting groove 122 is formed on the second mounting surface. Preferably, the first mounting surface and the second mounting surface are adjacent to each other and have a preset included angle.

[0025] To better match the closing and opening rotation path of the moving contact 130, the first limiting groove 121 is oriented in the same direction as the rotation direction of the contact support 120. Correspondingly, as... Figure 1 and Figure 5 As shown, the moving contact 130 includes a body 132 and a bent portion 131 connected to each other. The bending direction of the bent portion 131 relative to the body 132 is adapted to the setting direction of the first limiting groove 121. The bent portion 131 can be locked in the first limiting groove 121, thereby limiting the radial direction of the bent portion 131 and preventing it from radially displacing or shaking during movement.

[0026] The body 132 of the moving contact 130 is engaged within the second limiting groove 122, enabling radial limiting by the second limiting groove 122 to ensure precise engagement between the moving contact 130 and the stationary contact during operation. Preferably, as follows... Figure 1 As shown, the end of the body 132 extends from the end of the second limiting groove 122 away from the first limiting groove 121 to the outside of the contact support 120, for contacting or separating from the stationary contact.

[0027] It should be noted that, firstly, in one possible implementation of this application, such as Figure 5 As shown, the second limiting groove 122 includes a first sub-limiting groove 1221 and a second sub-limiting groove 1222 arranged at an angle. The body 132 of the moving contact 130 includes a first locking part 1321 and a second locking part 1322 arranged at an angle. The first locking part 1321 is locked in the first sub-limiting groove 1221, and the second locking part 1322 is locked in the second sub-limiting groove 1222.

[0028] Compared to the second limiting groove 122 that extends in a single direction, this application can form a multi-directional limiting boundary by using the first sub-limiting groove 1221 and the second sub-limiting groove 1222 that are set at an angle, which can more accurately limit the rotation or displacement of the moving contact 130 in the plane.

[0029] In order to better match the second limiting groove 122 with the rotation path of the moving contact 130 during closing and opening, the setting direction of the first sub-limiting groove 1221 is the same as the rotation direction of the contact support 120. That is, the setting direction of the first sub-limiting groove 1221 is the same as that of the first limiting groove 121, which facilitates the assembly connection between the bent part 131 of the moving contact 130 and the body 132, and further improves the assembly stability of the moving contact 130.

[0030] Secondly, in one possible embodiment of this application, the moving contact assembly 100 is disposed on the base 201 of an electrical device such as a circuit breaker. Figure 6 As shown, a mounting plate 2011 adapted to the shape and structure of the contact support 120 can be protruded on the base 201 to support and limit the assembly of the moving contact assembly 100.

[0031] The moving contact assembly 100 provided in this application includes a moving contact 130 and a contact support 120 that rotates around a rotation axis 110 to achieve contact or separation between the moving contact 130 and the stationary contact. The contact support 120 includes a first limiting groove 121 and a second limiting groove 122. The moving contact 130 includes a bent portion 131 that is engaged in the first limiting groove 121 and a body 132 that is engaged in the second limiting groove 122. The first limiting groove 121 and the second limiting groove 122 are used to limit the moving contact 130 radially along the rotation axis 110. With this arrangement, the first limiting groove 121 and the second limiting groove 122 can restrict the movement of the moving contact 130 in the radial direction, ensuring the stability of the moving contact 130 at this position, avoiding radial movement, improving the contact stability between the moving contact 130 and the stationary contact, and ensuring that the moving contact 130 can accurately cooperate with the stationary contact during operation. Compared to the existing technology that uses a hot riveting process to fix the moving contact 130 to the contact support 120, this application uses a first limiting groove 121 and a second limiting groove 122 to respectively engage different positions of the moving contact 130, which facilitates assembly while ensuring the assembly stability and reliability of the moving contact 130 and the contact support 120. The aforementioned moving contact assembly 100 is easy to assemble and disassemble, improving assembly accuracy and electrical performance stability.

[0032] In one possible implementation of this application, such as Figure 3 As shown, the side wall of the second limiting groove 122 is provided with a limiting buckle 123. The limiting buckle 123 has a first abutting surface 1231 facing the body 132 of the moving contact 130. The first abutting surface 1231 abuts against the axial end face of the body 132.

[0033] Specifically, when the body 132 of the moving contact 130 is engaged in the second limiting groove 122, the side of the moving contact 130 facing away from the base 201 abuts against the first contact surface 1231 of the limiting buckle 123. At this time, the limiting buckle 123 plays an axial limiting role on the body 132 of the moving contact 130, preventing the moving contact 130 from falling out of the second limiting groove 122.

[0034] It should be noted that the number of limiting buckles 123 is at least one, and this application does not impose any restrictions on the specific shape and protrusion length of the first abutment surface 1231. For ease of installation of the moving contact 130, preferably, the limiting buckles 123 are made of an elastic material. Figure 3 As shown, the first contact surface 1231 has a rectangular block structure to increase its contact area with the axial end face of the moving contact 130, thereby improving the limiting stability of the moving contact 130.

[0035] In one possible embodiment of this application, to further improve the limiting stability of the moving contact 130, the number of limiting latches 123 is at least one pair, and the pair of limiting latches 123 includes two limiting latches 123, which are respectively disposed on opposite side walls of the second limiting groove 122. In one possible embodiment of this application, the two limiting latches 123 can be positioned opposite each other; of course, in another possible embodiment of this application, the two limiting latches 123 can also be positioned offset, as long as they can axially limit the opposite sides of the moving contact 130 respectively.

[0036] In one possible implementation of this application, such as Figure 1 and Figure 4 As shown, the moving contact assembly 100 also includes a mechanism seat 140, which is coaxially arranged with the contact support 120 via a rotation shaft 110. At least a portion of the moving contact 130 is located between the mechanism seat 140 and the contact support 120, and is used to limit the moving contact 130 in the axial direction of the rotation shaft 110.

[0037] Specifically, a mechanism seat 140 is also provided on the side of the contact support 120 facing away from the base 201. For example... Figure 4 As shown, the mechanism base 140 has a second mounting hole 140A in the middle, which is arranged along its thickness direction. The second mounting hole 140A is coaxially arranged with the first mounting hole 120A of the contact support 120. The rotating shaft 110 can pass through the first mounting hole 120A and the second mounting hole 140A in sequence, so that the contact support 120 is coaxially arranged with the mechanism.

[0038] To avoid interference between the mechanism seat 140 and the rotation path of the contact support 120, preferably, as follows: Figure 1 As shown, the projected area of ​​the mechanism base 140 is not greater than the projected area of ​​the contact support 120, wherein the projected direction is the stacking direction of the mechanism base 140 and the contact support 120.

[0039] like Figure 1 As shown, at least a portion of the moving contact 130 is located between the mechanism seat 140 and the contact support 120. At this time, the mechanism seat 140 can axially limit the moving contact 130 located between the mechanism seat 140 and the contact support 120, further preventing the moving contact 130 from falling off from the first limiting groove 121 and the second limiting groove 122.

[0040] For example, such as Figure 1As shown, an elastic element 150 is provided between the mechanism base 140 and the contact support 120. The elastic element 150 is used to provide a preload force to the contact support 120 to rotate in the closing direction.

[0041] like Figure 3 and Figure 4 As shown, the mechanism base 140 has a second abutment surface 141, which is located on the rotation path of the contact support 120 during the opening of the moving contact 130 and the stationary contact; the contact support 120 has a first limiting surface 124 corresponding to the second abutment surface 141, which abuts against the second abutment surface 141 when the moving contact 130 and the stationary contact are opened.

[0042] Specifically, the rotation path of the mechanism base 140 is greater than the rotation path of the contact support 120, so that there is space between the mechanism base 140 and the contact for installing the elastic element 150. The elastic element 150 is arranged along the closing rotation direction of the moving contact assembly 100.

[0043] When the moving contact assembly 100 is driven to rotate in the closing direction of the moving contact 130, the mechanism base 140 and the contact support 120 rotate synchronously until the moving contact 130 contacts the stationary contact to close the circuit. At this time, the second abutment surface 141 of the mechanism base 140 abuts against the first limiting surface 124 of the contact support 120. The setting of the second abutment surface 141 can limit the opening rotation angle of the contact support 120, further improving the stability and accuracy of the connection between the moving contact 130 and the stationary contact.

[0044] After the moving contact 130 contacts the stationary contact to close the circuit, the mechanism seat 140 can rotate further along the axial direction relative to the contact support 120. At this time, the second abutment surface 141 and the first limiting surface 124 are no longer in contact, and the elastic element 150 is subjected to force and stored energy, thereby providing a preload force to the contact support 120 and the moving contact 130 to rotate in the closing direction, thereby improving the contact stability between the moving contact 130 and the stationary contact.

[0045] When the moving contact and the stationary contact are opened, the contact support 120 and the mechanism seat 140 rotate synchronously in the opening direction. At the same time, the elastic element 150 releases energy, further driving the mechanism seat 140 to rotate in the opening direction. When the moving contact 130 is opened with the stationary contact, the first limiting surface 124 and the second abutting surface 141 abut against each other, realizing the abutment and limiting of the contact support 120 and the mechanism seat 140.

[0046] It should be noted that, in one specific embodiment of this application, the elastic element 150 is a spring. Of course, in addition to a spring, the elastic element 150 can also be other elastic elements capable of storing and releasing energy, and this application does not impose any limitations on it.

[0047] Optionally, such as Figure 3 and Figure 4 The mechanism seat 140 has a second limiting surface 142, and the contact support 120 has a contact surface 125 facing the mechanism seat 140. The second limiting surface 142 is fitted to the contact surface 125 so that the second limiting surface 142 covers at least part of the moving contact 130 and is used to limit the moving contact 130 in the axial direction of the rotating shaft. The mechanism seat 140 also has a mechanism seat surface 145, and the contact support 120 has a corresponding contact seat surface 127. The mechanism seat surface 145 and the contact seat surface 127 are engaged and limited to each other, and limit the moving contact 130 in the radial direction of the rotating shaft 110.

[0048] Specifically, such as Figure 3 and Figure 4 The second limiting surface 142 is disposed on the side of the mechanism seat facing the contact support 120. The contact support 120 is provided with a contact surface 125 facing the second limiting surface 142. The moving contact 130 is assembled between the mechanism seat 140 and the contact support 120. The second limiting surface 142 and the contact surface 125 are mutually contacted and limited. When the second limiting surface 142 is contacted with the contact surface 125, it covers at least part of the moving contact 130 to limit the moving contact 130 axially.

[0049] like Figure 3 and Figure 4 The contact support 120 is provided with a contact seat surface 127 along the side edge of the closing direction. Correspondingly, the mechanism seat 140 is provided with a mechanism seat surface 145. The mechanism seat surface 145 and the contact seat surface 127 are structurally adapted to each other so that the mechanism seat surface 145 and the contact seat surface 127 can be mutually engaged and limited. At this time, the moving contact 130 can be limited in the radial direction of the rotating shaft 110 to prevent the moving contact 130 from rotating in the radial direction of the rotating shaft 110 along with the contact support 120.

[0050] For example, the mechanism base 140 has a mounting groove 143 opened along the rotation path in the closing direction, and the elastic member 150 is partially disposed in the mounting groove 143, with one end of the elastic member 150 abutting against the bottom of the mounting groove 143 and the other end abutting against the contact support 120.

[0051] Specifically, such as Figure 4 As shown, to prevent the elastic element 150 from falling between the mechanism base 140 and the contact support 120 when not under stress, the mechanism base 140 is also provided with a mounting groove 143 for mounting the elastic element 150. The elastic element 150 is disposed within the accommodating space of the mounting groove 143. The mounting groove 143 is opened along the rotation path in the closing direction, ensuring that the elastic element 150 remains within the relative motion trajectory range of the mechanism base 140 and the contact support 120 during the closing rotation process, thus preventing the elastic element 150 from falling off or becoming stuck due to positional deviation.

[0052] One end of the elastic element 150 is disposed within the mounting groove 143, and its end abuts against the bottom of the mounting groove 143. The contact support 120 is provided with an abutment plate protruding from the bottom of the mounting groove 143. Alternatively, the contact support 120 is also disposed in another groove for supporting the elastic element 150, such that the end of the elastic element 150 away from the mechanism seat 140 can abut against the abutment plate of the contact support 120 or the bottom of the mounting groove 143. This application does not impose any restrictions on the specific abutment form between the elastic element 150 and the contact support 120.

[0053] Preferably, such as Figure 4 As shown, in order to facilitate the assembly of the elastic element 150, the mounting groove 143 can be a semi-enclosed groove, and an opening for assembling the elastic element 150 can be opened at its top.

[0054] The mounting groove 143 provides support for the elastic element 150, preventing it from falling between the mechanism seat 140 and the contact support 120 when not under stress, thus further improving the structural stability and reliability of the moving contact assembly 100.

[0055] Optionally, such as Figure 3 and Figure 4 As shown, the bottom of the mounting groove 143 is provided with a first mounting post 144, and the contact support 120 has a second mounting post 126 protruding toward the first mounting post 144; one end of the elastic member 150 is sleeved on the outer wall of the first mounting post 144, and the other end is sleeved on the outer wall of the second mounting post 126.

[0056] Specifically, in order to further improve the structural stability and reliability of the moving contact assembly 100, such as Figure 4 As shown, a first mounting post 144 protrudes from the bottom of the mounting groove 143 located in the mechanism base 140. The orientation of the first mounting post 144 is the same as the rotation direction of the mechanism base 140 when it is closed; correspondingly, as Figure 3 As shown, a second mounting post 126 is provided on the bottom of the contact plate or mounting groove 143 of the contact support 120, and the second mounting post 126 is arranged opposite to the first mounting post 144.

[0057] The two opposite ends of the elastic element 150 can be respectively fitted onto the outside of the first mounting post 144 and the second mounting post 126, thereby further improving the stability and reliability of the elastic element 150. The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0058] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A moving contact assembly, characterized in that, It includes a movable contact (130) and a contact support (120) that rotates about a rotation axis (110); the contact support (120) includes a first limiting groove (121) and a second limiting groove (122); the movable contact (130) includes a bent portion (131) that is engaged in the first limiting groove (121) and a body (132) that is engaged in the second limiting groove (122), the first limiting groove (121) and the second limiting groove (122) are used to limit the movable contact (130) in the radial direction of the rotation axis (110).

2. The moving contact assembly according to claim 1, characterized in that, The side wall of the second limiting groove (122) is provided with a limiting buckle (123), the limiting buckle (123) has a first abutting surface (1231) facing the body (132) of the moving contact (130), the first abutting surface (1231) abuts against the axial end face of the body (132).

3. The moving contact assembly according to claim 2, characterized in that, The number of the limiting buckles (123) is at least one pair, and the pair of limiting buckles (123) are respectively disposed on the opposite side walls of the second limiting groove (122).

4. The moving contact assembly according to claim 1, characterized in that, The moving contact assembly (100) further includes a mechanism seat (140), which is coaxially arranged with the contact support (120) via the rotation shaft (110). At least a portion of the moving contact (130) is located between the mechanism seat (140) and the contact support (120) for limiting the moving contact (130) in the axial direction of the rotation shaft (110).

5. The moving contact assembly according to claim 4, characterized in that, An elastic element (150) is provided between the mechanism base (140) and the contact support (120), the elastic element (150) being used to provide a preload force to the contact support (120) to rotate in the closing direction.

6. The moving contact assembly according to claim 5, characterized in that, The mechanism base (140) has a second abutment surface (141), which is located on the rotation path of the contact support (120) during the opening of the moving contact (130) and the stationary contact; the contact support (120) has a first limiting surface (124) corresponding to the second abutment surface (141), which abuts against the second abutment surface (141) when the moving contact (130) and the stationary contact are opened.

7. The moving contact assembly according to claim 4, characterized in that, The mechanism seat (140) has a second limiting surface (142), and the contact support (120) has a contacting surface (125) facing the mechanism seat (140). The second limiting surface (142) is fitted to the contacting surface (125) so that the second limiting surface (142) covers at least part of the moving contact (130) for limiting the moving contact (130) in the axial direction of the rotating shaft (110). The mechanism seat (140) also has a mechanism seat surface (145), and the contact support (120) is correspondingly provided with a contact seat surface (127). The mechanism seat surface (145) and the contact seat surface (127) are mutually engaged and limited, and the moving contact (130) is limited in the radial direction of the rotating shaft (110).

8. The moving contact assembly according to claim 5, characterized in that, The mechanism base (140) has a mounting groove (143) opened along the rotation path in the closing direction. The elastic member (150) is partially disposed in the mounting groove (143), and one end of the elastic member (150) abuts against the bottom of the mounting groove (143) and the other end abuts against the contact support (120).

9. The moving contact assembly according to claim 8, characterized in that, The bottom of the mounting groove (143) is provided with a first mounting post (144), and the contact support (120) has a second mounting post (126) protruding toward the first mounting post (144); one end of the elastic member (150) is sleeved on the outer wall of the first mounting post (144), and the other end is sleeved on the outer wall of the second mounting post (126).

10. The moving contact assembly according to claim 1, characterized in that, The second limiting groove (122) includes a first sub-limiting groove (1221) and a second sub-limiting groove (1222) arranged at an angle. The body (132) of the moving contact (130) includes a first locking part (1321) and a second locking part (1322) arranged at an angle. The first locking part (1321) is locked in the first sub-limiting groove (1221), and the second locking part (1322) is locked in the second sub-limiting groove (1222).

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