Contact device and circuit breaker

Abstract

The utility model discloses a contact device and a circuit breaker, and relates to the low-voltage electrical technical field. The contact device comprises a mechanism seat, a moving contact group and a static contact group, the moving contact group comprises a supporting plate, and two moving contacts are arranged on the supporting plate; the static contact group comprises static contacts arranged corresponding to the moving contacts. The mechanism base is provided with a rotating piece, and the rotating piece is rotationally connected with the mechanism base and fixedly connected with the supporting plate. The supporting plate is provided with a rotating hole and a deflection shaft, and the extending direction of the deflection shaft is the same as the connecting line direction of the two movable contacts; the rotating hole is located in the middle of the deflection shaft, and the two sides of the deflection shaft are rotationally connected with the mechanism base. The deflection shaft is in clearance fit with the rotating hole. The moving contact group is driven to move along the closing direction, and the supporting plate deflects by a preset angle relative to the deflection shaft through the rotating hole, so that the two moving contacts are contacted with the static contact for closing. According to the contact device, the deflection direction of the moving contact group relative to the static contact group is adjusted through the clearance fit of the deflection shaft and the rotating hole, and the closing reliability and flexibility of the contact device are improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical technology, in particular to a contact device and a circuit breaker. Background Art

[0002] Circuit breakers are low-voltage terminal electrical appliances widely used in both industrial and civilian applications. Their primary internal components are the operating mechanism and contact assembly. By configuring appropriate delay and instantaneous mechanisms, they implement circuit opening and closing, overload, and short-circuit protection. To improve circuit breaker wear resistance, service life, and breaking capacity, existing circuit breaker contact assemblies utilize dual-breakpoint contact mechanisms. These devices feature two moving contacts and two stationary contacts on the same main circuit.

[0003] The two moving contacts of the existing double-breakpoint contact device approach or move away from the static contact through a rotating shaft, but during the closing process, it is easy for the two silver points corresponding to the two moving contacts to wear inconsistently. The two moving contacts of the existing double-breakpoint contact device cannot achieve left and right deflection, which can easily lead to the situation where one side of the moving contact contacts the static contact and the other side of the moving contact cannot contact the static contact, thereby causing the closing to fail. Utility Model Content

[0004] The purpose of the present utility model is to provide a contact device and a circuit breaker, which can adjust the deflection direction of the moving contact group relative to the static contact group through the clearance between the deflection shaft and the rotating hole during the closing process of the moving contact and the static contact, thereby ensuring that the moving contact and the static contact are in contact and closed, and improving the closing reliability and flexibility.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] On the one hand, the utility model provides a contact device, including a mechanism seat, a moving contact group and a static contact group, the moving contact group including a support plate, on which two moving contacts arranged side by side and at intervals are provided; the static contact group including a static contact arranged corresponding to the moving contact; the mechanism seat is provided with a rotating member, which is rotatably connected to the mechanism seat and fixedly connected to the support plate, so as to drive the moving contact group to rotate toward the static contact group so that the moving contact and the static contact contact and close the circuit; the support plate is provided with a rotating hole and a deflection axis, and the extension direction of the deflection axis is in the same direction as the direction of the line connecting the two moving contacts; the rotating hole is located in the middle of the deflection axis and the two sides of the deflection axis are respectively rotatably connected to the mechanism seat, and the deflection axis and the rotating hole are clearance-matched; the moving contact group is driven to move in the closing direction, and the support plate deflects a preset angle relative to the deflection axis through the rotating hole, so that both moving contacts contact the static contacts and close the circuit.

[0007] Optionally, the support plate includes a connected main body and a transfer part, two moving contact plates are spaced apart on one side of the main body away from the transfer part, and the moving contact is located on the side of the moving contact plate facing the static contact group; the rotation hole is arranged on the transfer part; the mechanism seat has a accommodating cavity corresponding to the position of the transfer part, and mounting holes coaxially arranged with the rotation hole are respectively arranged on opposite sides of the accommodating cavity; the transfer part can be arranged in the accommodating cavity, the deflection shaft can be passed through the rotation hole and the two ends are respectively rotatably arranged in the mounting holes.

[0008] Optionally, the rotating part includes a connecting shaft and an energy storage spring. The setting direction of the connecting shaft is the same as the setting direction of the deflection shaft. The connecting shaft is passed through the mechanism seat and is rotatably connected to the mechanism seat. The energy storage springs include two, and the two energy storage springs are respectively arranged on opposite sides of the connecting shaft. One end of the energy storage spring is connected to the connecting shaft and the other end is connected to the moving contact group.

[0009] Optionally, a groove is provided on one side of the support plate facing the mechanism seat, and one end of the energy storage spring is sleeved on the outer periphery of the connecting shaft, and the other end is clamped in the groove.

[0010] Optionally, a bent portion is provided at the end of the energy storage spring, one end of the energy storage spring is sleeved on the outer periphery of the connecting shaft, and the other end is pressed against the outer wall of the movable touch plate through the bent portion.

[0011] Optionally, opposite sides of the deflection shaft extend outward from the mounting hole, and one end of the energy storage spring is sleeved on the outer periphery of the connecting shaft, and the other end is sleeved on the outer periphery of the deflection shaft.

[0012] Optionally, a boss is provided on one side of the mechanism seat facing the adapter portion, and a limiting groove adapted to the boss is provided on one side of the adapter portion facing the mechanism seat, and the boss can be clamped in the limiting groove to limit and fix the support plate.

[0013] Optionally, an abutment portion is protruding from one end portion of the mechanism seat toward the support plate, and the abutment portion can abut against the plate surface of the support plate; when the static contact and the moving contact contact and close the circuit, the abutment portion separates from the plate surface of the support plate, and the support plate can adjust the deflection direction through the deflection axis.

[0014] Optionally, a silver dot is provided on a side of the moving contact facing the static contact.

[0015] Another aspect of the present invention provides a circuit breaker including a contact device.

[0016] The beneficial effects of the utility model include:

[0017] The present application provides a contact device, comprising a mechanism base, a moving contact group, and a stationary contact group. The moving contact group comprises a support plate, on which two moving contacts are spaced apart and arranged side by side. The stationary contact group comprises stationary contacts corresponding to the moving contacts. The mechanism base comprises a rotating member, which is rotatably connected to the mechanism base and fixedly connected to the support plate, so as to drive the moving contact group to rotate toward the stationary contact group so that the moving contacts contact and close the circuit breaker. The support plate comprises a rotating hole and a deflection axis, wherein the deflection axis extends in the same direction as the direction of the line connecting the two moving contacts. The rotating hole is located in the middle of the deflection axis, and both sides of the deflection axis are rotatably connected to the mechanism base, and the deflection axis and the rotating hole have a clearance fit. When the moving contact group is driven to move in the closing direction, the support plate deflects relative to the deflection axis by a preset angle via the rotating hole. Even if the wear levels of the silver points of the two moving contacts are different, the support plate can be deflected by the relative rotation between the rotating hole and the deflection axis, thereby adjusting the spacing between the moving contact and the stationary contact so that both moving contacts contact and close the circuit breaker. The above-mentioned contact device can adjust the deflection direction of the moving contact group relative to the static contact group through the clearance between the deflection shaft and the rotating hole during the closing process of the moving contact and the static contact, ensuring that the moving contact and the static contact are in contact and closed, thereby improving the closing reliability and flexibility.

[0018] The present application also provides a circuit breaker including the above-mentioned contact device. The contact structure of the circuit breaker can stably close the circuit breaker, thereby improving the reliability of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention 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 paying any creative work.

[0020] Figure 1 A schematic structural diagram of a contact device provided in an embodiment of the present utility model;

[0021] Figure 2 A schematic structural diagram of a movable contact group of a contact device provided in an embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of the connection between the moving contact group and the adapter of the contact device provided in an embodiment of the present utility model;

[0023] Figure 4 A schematic diagram of the connection between the abutment portion and the support plate when the contact device provided by an embodiment of the present utility model is open;

[0024] Figure 5A schematic diagram of the connection between the abutment portion and the support plate when the contact device provided by an embodiment of the present utility model is closed;

[0025] Figure 6 A cross-sectional view of a contact device provided in an embodiment of the present utility model;

[0026] Figure 7 This is a structural diagram of the mechanism base of the contact device provided in an embodiment of the utility model.

[0027] Icon: 100-contact device; 110-mechanism seat; 111-rotating part; 1111-connecting shaft; 1112-energy storage spring; 112-accommodating chamber; 113-mounting hole; 114-boss; 115-abutting part; 120-moving contact group; 121-support plate; 121a-moving contact point; 1211-rotating hole; 1212-deflection shaft; 1213-main body; 1214-transfer part; 1214a-limiting groove; 1215-moving contact plate; 1216-groove. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Generally, the devices of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it 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 rather that it can be slightly tilted.

[0033] It should also be noted that, in the description of this utility model, 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; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] Please refer to Figure 1 and Figure 2 The present embodiment provides a contact device 100, comprising a mechanism base 110, a moving contact group 120 and a static contact group. The moving contact group 120 comprises a support plate 121, on which two moving contacts 121a are arranged side by side and spaced apart; the static contact group comprises static contacts arranged corresponding to the moving contacts; the mechanism base 110 is provided with a rotating member 111, which is rotatably connected to the mechanism base 110 and fixedly connected to the support plate 121, so as to drive the moving contact group 120 to rotate toward the static contact group so that the moving contact 121a contacts the static contact to close the circuit breaker; the support plate 121 is provided with a rotating hole 1211 and a deflection shaft 1212, the extension direction of the deflection shaft 1212 is in the same direction as the connection direction of the two moving contacts 121a; the rotating hole 1211 is located in the middle of the deflection shaft 1212 and the two sides of the deflection shaft 1212 are respectively connected to the mechanism base 110 for rotation, and the deflection shaft 1212 and the rotating hole 1211 are clearance-matched; the moving contact group 120 is driven to move in the closing direction, and the support plate 121 is deflected by a preset angle relative to the deflection shaft 1212 through the rotating hole 1211, so that both moving contacts 121a are in contact with the static contact for closing.

[0035] Specifically, if Figure 1 As shown, the contact device 100 includes a mechanism base 110, a moving contact group 120 and a static contact group. The moving contact group 120 is rotatably connected to the mechanism base 110 through an adapter. The operating mechanism of the circuit breaker can drive the moving contact group 120 to move in the closing direction through the mechanism base 110 to close the circuit breaker with the static contact group.

[0036] The movable contact assembly 120 includes a support plate 121. Two movable contacts 121a are disposed on a side of the support plate 121 away from the mechanism base 110. The two movable contacts 121a are spaced apart and arranged side by side so as to lie in the same plane. Correspondingly, the stationary contact assembly also includes two stationary contacts, spaced apart and arranged side by side so that their positions match those of the movable contacts 121a.

[0037] Optionally, in order to reduce the influence of arc erosion and extend the service life of the contact device 100, a silver point is provided on the side of the movable contact 121a facing the static contact, and the movable contact 121a contacts the static contact through the silver point to close the circuit.

[0038] When the static contact and the moving contact 121a are in opening or closing operation for a long time, it is inevitable that the silver point of the moving contact will be worn. When the degree of wear of the silver points of the two moving contacts is inconsistent, since the two moving contacts of the existing moving contact group are fixed in position and cannot be deflected, it is easy for the moving contact with a lower degree of silver point wear to contact the static contact, and the moving contact with a higher degree of silver point wear cannot contact due to the larger distance between it and the static contact, resulting in non-conduction when the contact device is closed.

[0039] In order to solve the above problems, Figure 2 As shown, the support plate 121 of the present application is provided with a rotation hole 1211 on one side close to the mechanism seat 110, and the rotation hole 1211 is located in the middle of the support plate 121; the support plate 121 is also provided with a deflection shaft 1212, the deflection shaft 1212 is passed through the rotation hole 1211, and the opposite sides of the deflection shaft 1212 are respectively rotatably connected to the mechanism seat 110 to limit and fix the deflection shaft 1212, thereby improving the stability of the support plate 121 during the deflection process.

[0040] Since the deflection shaft 1212 and the rotating hole 1211 are clearance-fitted, there is a certain amount of movable space between the deflection shaft 1212 and the rotating hole 1211, so that the support plate 121 can deflect a preset angle relative to the deflection shaft 1212 through the rotating hole 1211. During the actual closing process, if the wear degrees of the two moving contacts 121a are different, the support plate 121 can pass through the relative movement space between the rotating hole 1211 and the deflection shaft 1212, with the connection between the deflection shaft 1212 and the rotating hole 1211 as the deflection center, so that the moving contact 121a on the side with higher wear degree is offset toward the static contact, so as to adjust the relative distance between the moving contact 121a and the static contact, so as to ensure that both moving contacts 121a are in contact with the static contact for closing.

[0041] It should be noted that, in one embodiment of the present application, Figure 2 As shown, the support plate 121 includes a main body 1213 and a transition portion 1214 connected to each other. Two movable contact plates 1215 are spaced apart on one side of the main body 1213 away from the transition portion 1214. The movable contact is located on the side of the movable contact plate 1215 facing the static contact group. Figure 7 As shown, the rotation hole 1211 is arranged on the adapter part 1214; the mechanism seat 110 has a accommodating cavity 112 corresponding to the position of the adapter part 1214, and the opposite sides of the accommodating cavity 112 are respectively provided with mounting holes 113 coaxially arranged with the rotation hole 1211; the adapter part 1214 can be set in the accommodating cavity 112, and the deflection shaft 1212 can be passed through the rotation hole 1211 and the two ends are respectively rotatably arranged in the mounting holes 113.

[0042] Specifically, if Figure 2 As shown, the support plate 121 includes a main body 1213 and an adapter portion 1214. The adapter portion 1214 is disposed in the middle portion of the main body 1213 on a side close to the mechanism base 110. An adapter hole is provided through the adapter portion 1214, and the support plate 121 is connected to the mechanism base 110 via the adapter portion 1214. Two movable contact plates 1215 are spaced apart on a side of the main body 1213 away from the adapter portion 1214. The movable contacts are located on the side of the movable contact plates 1215 facing the static contact group. Because the deflection shaft 1212, which passes through the rotation hole 1211, is rotatably connected to the mechanism base 110 on opposite sides, a receiving cavity 112 is provided on the mechanism base 110 at a position corresponding to the receiving cavity 1214 to facilitate the installation of the adapter portion 1214. The receiving cavity 112 is capable of accommodating the adapter portion 1214. Mounting holes 113, coaxially arranged with the rotation hole 1211, are provided on opposite sides of the receiving cavity 112. The ends of the deflection shaft 1212 can be respectively installed in the mounting holes 113. The provision of the adapter portion 1214 allows the movable contact plate 1215 of the support plate 121 to deflect relative to the static contact assembly and stably move in the closing direction, thereby improving the stability and reliability of the closing process.

[0043] The above-mentioned contact device 100 can adjust the deflection direction of the moving contact group 120 relative to the static contact group through the clearance between the deflection shaft 1212 and the rotating hole 1211 during the closing process of the moving contact and the static contact, ensuring that the moving contact and the static contact are in contact and closed, thereby improving the closing reliability and flexibility.

[0044] For example, Figure 3 As shown, the rotating member 111 includes a connecting shaft 1111 and an energy storage spring 1112. The setting direction of the connecting shaft 1111 is the same as the setting direction of the deflection shaft 1212. The connecting shaft 1111 is passed through the mechanism base 110 and is rotatably connected to the mechanism base 110. The energy storage spring 1112 includes two, and the two energy storage springs 1112 are respectively arranged on opposite sides of the connecting shaft 1111. One end of the energy storage spring 1112 is connected to the connecting shaft 1111, and the other end is connected to the moving contact group 120.

[0045] Specifically, if Figure 3 As shown, the rotating member 111 includes a connecting shaft 1111 that passes through the mechanism base 110. An energy storage spring 1112 is sleeved on the connecting shaft 1111. Preferably, to improve the stability and reliability of the support plate 121 during rotation in the closing direction, two energy storage springs 1112 are provided, one on opposite sides of the connecting shaft 1111. One end of the energy storage spring 1112 is connected to the connecting shaft 1111, and the other end is connected to the moving contact assembly 120. This allows the support plate 121 to rotate about the connecting shaft 1111 via the energy storage spring 1112, thereby bringing the moving contact 121a closer to the static contact.

[0046] By setting the energy storage spring 1112, the movement process of the support plate 121 driving the two moving contacts 121a to approach the static contact can be made more stable, and at the same time, contact pressure can be provided for the process of the moving contact 121a and the static contact to contact and close, so as to cooperate with the deflection process of the support plate 121 relative to the deflection axis 1212, thereby further improving the closing reliability of the contact device 100.

[0047] It should be noted that the present application does not impose any limitation on the specific connection method between the energy storage spring 1112 and the moving contact group 120. In one possible implementation method of the present application, Figure 2 As shown, a groove 1216 is provided on the side of the support plate 121 facing the mechanism base 110, and one end of the energy storage spring 1112 is sleeved on the outer periphery of the connecting shaft 1111, and the other end is clamped in the groove 1216. Alternatively, a through groove can be provided on the surface of the support plate 121, and one end of the energy storage spring 1112 is sleeved on the outer periphery of the connecting shaft 1111, and the other end is inserted into the through groove.

[0048] In another possible implementation of the present application, the end of the energy storage spring 1112 is provided with a bending portion (not shown in the figure), so that the end of the energy storage spring 1112 is bent toward the setting direction of the dynamic touch plate 1215 to form an L-shaped structure, and one end of the energy storage spring 1112 is sleeved on the outer periphery of the connecting shaft 1111, and the other side is pressed against the outer wall of the dynamic touch plate 1215 through the bending portion.

[0049] In another possible implementation of the present application, opposite sides of the deflection shaft 1212 extend outward from the mounting hole 113, and one end of the energy storage spring 1112 is sleeved on the outer periphery of the connecting shaft 1111, and the other side is sleeved on the outer periphery of the deflection shaft 1212 (not shown in the figure), so that the energy storage spring 1112 indirectly provides contact pressure to the process of contact and closing of the moving contact 121a and the static contact through the deflection shaft 1212.

[0050] For example, Figure 6 As shown, a boss 114 is provided on one side of the mechanism seat 110 facing the adapter portion 1214 , and a limiting groove 1214 a matching the boss 114 is provided on one side of the adapter portion 1214 facing the mechanism seat 110 . The boss 114 can be clamped in the limiting groove 1214 a to limit and fix the support plate 121 .

[0051] Specifically, if Figure 6 As shown, in order to prevent the large short-circuit current from repelling the moving contact group 120 and the static contact group, a boss 114 is further provided on the side of the mechanism seat 110 facing the adapter 1214. Correspondingly, a limiting groove 1214a adapted to the boss 114 is provided on the side of the adapter 1214 facing the mechanism seat 110. When the moving contact 121a and the static contact are closed, the boss 114 can be just stuck in the limiting groove 1214a to limit the moving contact group 120, thereby preventing the moving contact 121a and the static contact from having an unstable connection due to the large short-circuit current.

[0052] In one embodiment of the present application, please refer to Figure 4 and Figure 5 A contact portion 115 is protruded from one end portion of the mechanism seat 110 facing the support plate 121, and the contact portion 115 can contact the plate surface of the support plate 121; when the static contact and the moving contact 121a contact and close the circuit, the contact portion 115 separates from the plate surface of the support plate 121, and the support plate 121 can adjust the deflection direction through the deflection shaft 1212.

[0053] Specifically, the end of the mechanism seat 110 facing the support plate 121 is provided with a protruding abutment portion 115. Figure 5As shown, when the moving contact 121a is opened from the static contact, the surface of the abutting portion 115 can abut against the plate surface of the support plate 121. At this time, the support plate 121 is limited by the abutting portion 115 of the mechanism base 110, so that the support plate 121 cannot deflect relative to the deflection axis 1212 through the rotation hole 1211, and the position of the moving contact 121a is fixed.

[0054] like Figure 4 As shown, when the moving contact 121a is closed with the static contact, the support plate 121 is rotated by the rotating shaft relative to the mechanism seat 110 and moves toward the static contact group along the closing direction. At this time, the surface of the abutment portion 115 is separated from the plate surface of the support plate 121 and the abutment is cancelled. At this time, the support plate 121 is no longer affected by the abutment portion 115 of the mechanism seat 110. The support plate 121 can be deflected relative to the deflection axis 1212 through the rotating hole 1211, thereby making the moving contact 121a stably closed with the static contact.

[0055] Preferably, in order to further improve the abutment and limiting reliability of the abutment portion 115 against the support plate 121, two abutment portions 115 are provided, and the two abutment portions 115 are symmetrically arranged on the left and right sides of the transfer portion 1214 of the support plate 121, so that the abutment force of the abutment portion 115 on the support plate 121 is uniform.

[0056] By providing the abutting portion 115 , the support plate 121 can adjust the deflection of the closing angle only when the moving contact 121 a is closed with the static contact, making the deflection process of the contact device 100 more controllable and reliable.

[0057] This application also provides a circuit breaker including the aforementioned contact device 100. The circuit breaker also includes an operating mechanism capable of driving a movable contact assembly 120 in a closing direction to engage with the stationary contact assembly. The specific structure and beneficial effects of the contact device 100 have been described in detail above and will not be further elaborated here. The contact structure of this circuit breaker enables stable closing, improving the reliability of the circuit breaker.

[0058] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0059] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A contact device, characterized in that: The invention comprises a mechanism seat (110), a moving contact group (120) and a static contact group, wherein the moving contact group (120) comprises a support plate (121), and the support plate (121) is provided with two moving contacts (121a) arranged side by side and spaced apart; the static contact group comprises static contacts arranged corresponding to the moving contacts; the mechanism seat (110) is provided with a rotating member (111), and the rotating member (111) is rotatably connected to the mechanism seat (110) and fixedly connected to the support plate (121) to drive the moving contact group (120) to rotate toward the static contact group so that the moving contact (121a) contacts the static contact to close the circuit; the support plate (121) is provided with a rotating hole (121) 11) and a deflection shaft (1212), the extension direction of the deflection shaft (1212) is in the same direction as the connection direction of the two moving contacts (121a); ​​the rotation hole (1211) is located in the middle of the deflection shaft (1212), and both sides of the deflection shaft (1212) are rotationally connected to the mechanism seat (110), and the deflection shaft (1212) and the rotation hole (1211) are clearance-matched; the moving contact group (120) is driven to move in the closing direction, and the support plate (121) is deflected by a preset angle relative to the deflection shaft (1212) through the rotation hole (1211), so that both the moving contacts (121a) contact the static contact to close the circuit.

2. The contact device according to claim 1, characterized in that The support plate (121) comprises a main body (1213) and a transition portion (1214) connected to each other; two movable contact plates (1215) are arranged at intervals on one side of the main body (1213) away from the transition portion (1214); the movable contact is located on the side of the movable contact plate (1215) facing the static contact group; the rotation hole (1211) is arranged on the transition portion (1214); the mechanism seat (110) has a receiving cavity (112) corresponding to the position of the transition portion (1214); opposite sides of the receiving cavity (112) are respectively provided with mounting holes (113) arranged coaxially with the rotation hole (1211); the transition portion (1214) can be arranged in the receiving cavity (112); the deflection shaft (1212) can be passed through the rotation hole (1211) and its two ends are respectively rotatably arranged in the mounting holes (113).

3. The contact device according to claim 2, characterized in that The rotating member (111) comprises a connecting shaft (1111) and an energy storage spring (1112); the setting direction of the connecting shaft (1111) is the same as the setting direction of the deflection shaft (1212); the connecting shaft (1111) is inserted into the mechanism seat (110) and is rotatably connected to the mechanism seat (110); the energy storage spring (1112) comprises two, and the two energy storage springs (1112) are respectively arranged on opposite sides of the connecting shaft (1111); one end of the energy storage spring (1112) is connected to the connecting shaft (1111), and the other end is connected to the moving contact group (120).

4. The contact device according to claim 3, characterized in that A groove (1216) is provided on one side of the support plate (121) facing the mechanism seat (110); one end of the energy storage spring (1112) is sleeved on the outer periphery of the connecting shaft (1111), and the other end is clamped in the groove (1216).

5. The contact device according to claim 3, characterized in that A bending portion is provided at the end of the energy storage spring (1112); one end of the energy storage spring (1112) is sleeved on the outer periphery of the connecting shaft (1111), and the other end is pressed against the outer wall of the moving touch plate (1215) through the bending portion.

6. The contact device according to claim 3, characterized in that The opposite sides of the deflection shaft (1212) extend outward from the mounting hole (113); one end of the energy storage spring (1112) is sleeved on the outer periphery of the connecting shaft (1111), and the other end is sleeved on the outer periphery of the deflection shaft (1212).

7. The contact device according to claim 2, characterized in that The mechanism seat (110) is provided with a boss (114) on one side facing the adapter portion (1214), and the adapter portion (1214) is provided with a limiting groove (1214a) adapted to the boss (114) on one side facing the mechanism seat (110), and the boss (114) can be clamped in the limiting groove (1214a) to limit and fix the support plate (121).

8. The contact device according to claim 2, characterized in that The mechanism seat (110) is provided with an abutting portion (115) protruding from one end portion thereof facing the support plate (121), and the abutting portion (115) can abut against the plate surface of the support plate (121); when the static contact and the moving contact (121a) are in contact and closed, the abutting portion (115) is separated from the plate surface of the support plate (121), and the support plate (121) can adjust the deflection direction via the deflection shaft (1212).

9. The contact device according to claim 1, characterized in that A silver dot is provided on the side of the movable contact (121a) facing the static contact.

10. A circuit breaker, characterized in that: The contact device (100) comprises any one of claims 1 to 9.

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