Tripping device and circuit breaker

Abstract

The invention discloses a tripping device and a circuit breaker, and relates to the low-voltage electrical technical field. The tripping device comprises an operating mechanism which rotates around a first rotating shaft and a tripping accessory which rotates around a second rotating shaft and is matched with the operating mechanism. The tripping accessory is provided with a driving part; the operating mechanism comprises a moving contact assembly, a lock catch and a jump pin, the jump pin is connected with the moving contact assembly, and the lock catch is buckled with the jump pin; the lock catch is provided with a first driven part in driving fit with the driving part, the driving part is driven by external force, and the lock catch and the jump pin are unlocked through the first driven part. The tripping device can directly drive the lock catch to unlock after being subjected to external tripping force, the action synchronism of multi-stage tripping is improved, and the transverse size of the device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-voltage electrical technology, in particular to a tripping device and a circuit breaker. BACKGROUND

[0002] The tripping device is a key execution component for realizing the protection function of the circuit breaker, and is used for unlocking the operating mechanism to forcibly break the circuit when overload, short circuit or external signal triggering occurs.

[0003] The existing tripping accessory mainly adopts a two-stage transmission mode, that is, an external tripping force first drives a transmission piece, and then indirectly pushes a lock catch to be unlocked through an intermediate piece such as a connecting rod. Such a transmission mode is prone to cause action delay in the case of multi-stage tripping, resulting in poor synchronization of multi-stage tripping. Meanwhile, such a transmission mode occupies horizontal space, which is not conducive to the miniaturization of the circuit breaker. SUMMARY

[0004] The present application aims to provide a tripping device and a circuit breaker, which can directly drive a lock catch to be unlocked after being subjected to an external tripping force, improve the action synchronization of multi-stage tripping, and reduce the horizontal size of the device, which is conducive to the miniaturization of the device.

[0005] Embodiments of the present application are implemented as follows: In one aspect of the present application, a tripping device is provided, which comprises an operating mechanism arranged to rotate about a first rotation axis and a tripping accessory arranged to rotate about a second rotation axis and cooperated with the operating mechanism; the tripping accessory has a driving part; the operating mechanism comprises a movable contact assembly, a lock catch and a trip catch, the trip catch is connected with the movable contact assembly, and the lock catch and the trip catch are buckled; the lock catch has a first driven part cooperated with the driving part for driving, the driving part is driven by an external force, and the lock catch and the trip catch are unlocked through the first driven part.

[0006] Optionally, the driving part 121 has a first boss, and the first boss is used to drive the first driven part to rotate axially.

[0007] Optionally, the first boss is arranged on the body of the driving part; the movable contact assembly comprises a mechanism seat for arranging the movable contact, and the body of the driving part is located between the mechanism seat and the lock catch in the axial direction of the first rotation axis; the first boss extends from the body to the lock catch in the axial direction of the first rotation axis.

[0008] Optionally, the movable contact assembly has a second boss, and the tripping device further comprises a reset spring arranged on the tripping accessory, the reset spring is used to provide a reset force to the driving part 121, so that the driving part 121 keeps abutting against the second boss; when the tripping accessory is driven by an external force to unlock the lock catch and the trip catch, the reset spring is stressed to store energy.

[0009] Optionally, the tripping accessory has an indicating end, and an end face of the indicating end has a tripping indicating face and a closing indicating face; the tripping indicating face is used to represent a separation state of the moving contact assembly and the static contact of the circuit breaker; and the closing indicating face is used to represent a contact state of the moving contact assembly and the static contact.

[0010] Optionally, the driving part 121 has an operating tripping end, and the operating tripping end has an operating handle extending out of a shell of the circuit breaker, and the operating handle can drive the operating tripping end and the first driven part to rotate axially.

[0011] Optionally, the lock catch has a second driven part; the tripping device further comprises a pushing piece and a thermal tripping piece, the pushing piece comprises a first driving face and a second driving face, and a deformation end of the thermal tripping piece is arranged on a side of the first driving face away from the second driving face; the second driving face is in driving cooperation with the second driven part; and the deformation end of the thermal tripping piece drives the pushing piece to move towards the operating mechanism through the first driving face, so that the second driven part drives the lock catch and the jumper to be unlocked.

[0012] Optionally, the lock catch has a second driven part; the tripping device further comprises a pushing piece and an electromagnetic tripping assembly; the electromagnetic tripping assembly comprises a push rod; the pushing piece comprises a first driving face and a second driving face, the push rod is in driving connection with the first driving face, and the second driving face is in driving cooperation with the second driven part; and the push rod drives the pushing piece to move towards the operating mechanism through the first driving face, so that the second driven part drives the lock catch and the jumper to be unlocked.

[0013] Optionally, the pushing piece is in sliding clamping connection with the electromagnetic tripping assembly, the electromagnetic tripping assembly is arranged on a top of the pushing piece, and the tripping accessory is arranged on a side of the electromagnetic tripping assembly away from the pushing piece.

[0014] Optionally, the tripping device further comprises an electromagnetic tripping assembly, the electromagnetic tripping assembly is arranged in a first direction along a shell of the circuit breaker in movement of the operating mechanism; and the tripping accessory is arranged in a second direction along the shell of the circuit breaker, the first direction is perpendicular to the second direction.

[0015] In another aspect of the present application, a circuit breaker is provided, comprising a shell, a static contact and a tripping device; the static contact and the tripping device are arranged in the shell; a moving contact assembly of the tripping device comprises a moving contact in contact with or separated from the static contact; a tripping accessory of the tripping device has a driving part; a lock catch of the tripping device has a first driven part, the driving part is in driving cooperation with the first driven part; and the shell comprises an upper cover, an inner wall of the upper cover is provided with a third boss; when the moving contact is in contact with the static contact to close, a side of the driving part away from the first driven part abuts against the third boss.

[0016] The present application has the following beneficial effects: The application provides a tripping device, comprising an operating mechanism arranged to rotate around a first rotation axis and a tripping accessory arranged to rotate around a second rotation axis and matched with the operating mechanism; the tripping accessory has a driving part; the operating mechanism comprises a movable contact assembly, a lock catch and a trip catch, the trip catch is connected with the movable contact assembly, and the lock catch and the trip catch are buckled; the lock catch has a first driven part matched with the driving part for driving, the driving part is driven by external force, and the lock catch is unlocked with the trip catch through the first driven part. Compared with the indirect transmission mode of the two-stage transmission in the prior art, the application directly matches the tripping accessory with the operating mechanism, reduces the intermediate transmission components, shortens the transmission path, and helps to improve the synchronization of multi-stage tripping; at the same time, the intermediate transmission components arranged horizontally are omitted, the horizontal space occupation is reduced, and the miniaturization of the device is facilitated. The above-mentioned tripping device can directly drive the lock catch to be unlocked after being subjected to external tripping force, improve the action synchronization of multi-stage tripping, and reduce the horizontal size of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 One of the structure schematic diagrams of the circuit breaker during tripping provided by the embodiments of the present application; Figure 2 The enlarged view of the details at A; Figure 3 The structure schematic diagram of the circuit breaker during closing provided by the embodiments of the present application; Figure 4 The enlarged view of the details at B; Figure 5 The second structure schematic diagram of the circuit breaker during tripping provided by the embodiments of the present application.

[0019] Legend: 110 - operating mechanism; 111 - movable contact assembly; 1111 - second boss; 1112 - movable contact; 1113 - contact support; 1114 - mechanism seat; 112 - lock catch; 1121 - first driven part; 1122 - second driven part; 113 - trip catch; 120 - tripping accessory; 121 - driving part; 1211 - first boss; 122 - indicating end; 123 - operating tripping end; 1231 - operating handle; 130 - reset spring; 140 - pushing piece; 141 - first driving surface; 142 - second driving surface; 150 - electromagnetic tripping assembly; 160 - thermal tripping piece; 170 - first rotation axis; 180 - second rotation axis; 200 - circuit breaker; 201 - shell; a - first direction; b - second direction. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship usually placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The trip device provided in the embodiment aims to solve the problems of poor synchronization of multi-stage tripping, large transverse space occupation and the like caused by the secondary transmission mode in the prior art. The device optimizes the transmission path, integrates the functions of core components and adds a state indication mechanism, thereby realizing the efficiency of tripping action, the compactness of structure and the intuitiveness of running state.

[0025] Please refer to Figure 1 and Figure 3The embodiment provides a tripping device, which comprises an operating mechanism 110 rotating around a first rotation shaft 170 and a tripping accessory 120 rotating around a second rotation shaft 180 and cooperating with the operating mechanism 110; the tripping accessory 120 has a driving part 121; the operating mechanism 110 comprises a movable contact assembly 111, a lock catch 112 and a trip catch 113, the trip catch 113 is connected with the movable contact assembly 111, and the lock catch 112 and the trip catch 113 are buckled; the lock catch 112 has a first driven part 1121 cooperating with the driving part 121, the driving part 121 is driven by external force, and the lock catch 112 of the operating mechanism 110 is unlocked from the trip catch 113 through the first driven part 1121.

[0026] Specifically, as shown in Figure 1 and Figure 3 , the tripping device comprises the operating mechanism 110 and the tripping accessory 120. The operating mechanism 110 comprises the movable contact assembly 111, the trip catch 113 connected with the movable contact assembly 111, and the lock catch 112 buckled with the trip catch 113. The movable contact assembly 111 is composed of a contact support 1113, a movable contact 1112 and a mechanism seat 1114. The movable contact 1112 is arranged between the contact support 1113 and the mechanism seat 1114, and the contact support 1113 and the mechanism seat 1114 are coaxially arranged to drive the movable contact 1112 to rotate around the shaft, so as to contact or separate from the static contact of the circuit breaker 200, thereby achieving the closing or opening of the circuit breaker 200.

[0027] The operating mechanism 110 and the tripping accessory 120 are arranged in the housing 201 of the circuit breaker 200, as shown in Figure 5 , the first rotation shaft 170 and the second rotation shaft 180 are fixedly arranged on the mounting surface of the housing 201. In an embodiment of the present application, as shown in Figure 2 and Figure 4 , the tripping accessory 120 has the driving part 121 in the form of an extended rod structure; correspondingly, the lock catch 112 has the first driven part 1121 located in the rotation range of the driving part 121, so that the driving part 121 can drive the first driven part 1121.

[0028] When the tripping accessory 120 is driven by external force, the driving part 121 rotates around the first rotation shaft 170 and drives the lock catch 112 to rotate synchronously through the first driven part 1121, until the lock catch 112 is unlocked from the trip catch 113, at this time, the movable contact assembly 111 rotates towards the opening direction, so that the movable contact 1112 is separated from the static contact.

[0029] In order to further improve the reliability of the transmission cooperation between the tripping accessory 120 and the lock catch 112, optionally, as shown in Figure 2 and Figure 4As shown, the driving part 121 has a first boss 1211 having a driving surface, when the tripping accessory 120 is driven by external force, the driving part 121 abuts against the first driven part 1121 through the driving surface of the first boss 1211, and drives the first driven part 1121 to rotate axially through the first boss 1211.

[0030] Optionally, referring to Figure 1 and Figure 2 , the first boss 1211 is arranged on the body of the driving part 121; the movable contact assembly 111 includes a mechanism seat 1114 for arranging the movable contact 1112, the body part of the driving part 121 is located between the mechanism seat 1114 and the lock catch 112 along the axial direction of the first rotation shaft 170, so as to make the structure of the device more compact while ensuring reliable driving; the first boss 1211 extends from the body to the lock catch 112 along the axial direction of the first rotation shaft 170, so as to ensure that the first boss 1211 can effectively drive the lock catch 112 and the trip catch 113 to be unlocked.

[0031] The present application provides a tripping device, comprising an operating mechanism 110 arranged to rotate around a first rotation shaft 170 and a tripping accessory 120 arranged to rotate around a second rotation shaft 180 and cooperated with the operating mechanism 110; the tripping accessory 120 has a driving part 121; the operating mechanism 110 includes a movable contact assembly 111, a lock catch 112 and a trip catch 113, the trip catch 113 is connected with the movable contact assembly 111, and the lock catch 112 and the trip catch 113 are buckled; the lock catch 112 has a first driven part 1121 cooperated with the driving part 121 for driving, the driving part 121 is driven by external force, and the lock catch 112 and the trip catch 113 of the operating mechanism 110 are unlocked through the first driven part 1121. Compared with the indirect driving mode of two-stage transmission in the prior art, the present application directly cooperates the tripping accessory 120 with the operating mechanism 110, reduces the intermediate transmission parts, shortens the transmission path, and helps to improve the synchronization of multi-stage tripping; at the same time, the intermediate transmission parts arranged transversely are omitted, the transverse space occupation is reduced, and the miniaturization of the device is facilitated. The above-mentioned tripping device can directly drive the lock catch 112 to be unlocked after being subjected to external tripping force, improves the action synchronization of multi-stage tripping, and reduces the transverse size of the device.

[0032] Optionally, as shown in Figure 2 and Figure 4 , the movable contact assembly 111 has a second boss 1111, and the tripping device further comprises a reset spring 130 arranged on the tripping accessory 120, the reset spring 130 is used for providing a reset force to the driving part 121, so that the driving part 121 abuts against the second boss 1111; when the tripping accessory 120 is driven by external force to unlock the lock catch 112 and the trip catch 113, the reset spring 130 is stressed to store energy.

[0033] Specifically, as shown in Figure 4As shown, a second protrusion 1111 is provided on the mechanism seat 1114 of the moving contact assembly 111. The second protrusion 1111 is located at the top of the drive part 121 and abuts against the drive part 121. When the moving contact assembly 111 moves toward the closing direction, the mechanism seat 1114 rotates along the first rotation axis 170. At this time, the second protrusion 1111 gradually rises along the rotation path of the mechanism seat 1114, causing the reset spring 130 to gradually release the reset force and push the drive part 121 to rotate synchronously with the second protrusion 1111. Throughout the process, the drive part 121 always abuts against the second protrusion 1111. This synchronous movement ensures that the tripping accessory 120 gradually rotates to the closing limit point as the operating mechanism 110 closes.

[0034] like Figure 2 As shown, when the tripping attachment 120 is driven by an external force, it rotates counterclockwise around the second rotating shaft 180. At this time, the driving part 121 presses down on the first driven part 1121 and gradually separates from the second boss 1111. During the process of the driving part 121 pressing down on the first driven part 1121, the return spring 130 is twisted due to the rotation of the tripping attachment 120, and its elastic potential energy increases. When the first driven part 1121 is pressed to the preset position, the latch 112 and the trip latch 113 unlock, and the moving contact assembly 111 rotates around the opening direction until the opening is completed. The driving part 121 then abuts against the second boss 1111 again, preparing for the next closing.

[0035] By cooperating with the reset spring 130 and the second protrusion 1111, the precise synchronization of the closing action is ensured, and the automatic reset after tripping is achieved. At the same time, the structure is simplified and the reliability is improved.

[0036] For example, such as Figure 5 As shown, the tripping accessory 120 has an indicator end 122, and the end face of the indicator end 122 has an opening indicator surface and a closing indicator surface; the opening indicator surface is used to characterize the separation state of the moving contact assembly 111 and the stationary contact of the circuit breaker 200; the closing indicator surface is used to characterize the contact state of the moving contact assembly 111 and the stationary contact.

[0037] Specifically, the indicator terminal 122 is an extension structure of the status display function integrated on the trip accessory 120, such as... Figure 5 As shown, its end face has an arc-shaped structure to match the rotation path of the trip attachment 120 around the second rotation axis 180. The end face of the indicator end 122 has an open indicator surface and a close indicator surface. The open indicator surface and the close indicator surface can be distinguished by color, or by specific patterns or text. This application does not impose any restrictions on this. In order to facilitate operators to see the open and close status of the circuit breaker 200 more quickly and intuitively, the housing 201 of the circuit breaker 200 is provided with a display window corresponding to the end face of the indicator end 122. The open indicator surface or the close indicator surface can be displayed through the display window.

[0038] In an embodiment of the present application, the tripping indication surface and the closing indication surface are distinguished by color. The tripping indication surface is pasted or coated with a green layer, when the moving contact 1112 is separated from the static contact, the indication end 122 of the tripping accessory 120 is driven to rotate, at this time, the tripping indication surface corresponds to the position of the display window; the closing indication surface is pasted or coated with a red layer, when the moving contact 1112 is in contact with the static contact, the indication end 122 of the tripping accessory 120 is driven to rotate, at this time, the closing indication surface corresponds to the position of the display window.

[0039] Since the existing tripping device lacks a closing indication function, the user cannot directly judge the on-off state of the circuit breaker 200, and needs to confirm with the aid of a measuring tool, which increases the operation complexity and safety risk. The tripping device provided in the present application can directly display the tripping indication surface and the closing indication surface, so that the user can quickly master the circuit state without additional tools, especially in emergency maintenance or troubleshooting, which can significantly shorten the judgment time.

[0040] Optionally, as shown in Figure 5 The driving part 121 has an operation tripping end 123, and the operation tripping end 123 has an operation handle 1231 extending out of the shell 201 of the circuit breaker 200, and the operation handle 1231 can drive the operation tripping end 123 and the first driven part 1121 to rotate axially.

[0041] Specifically, as shown in Figure 5 The operation tripping end 123 is a functional extension structure of the driving part 121, which functions to receive the thrust provided by an external such as manual operation or an electric device, and the driving part 121 is driven to rotate by the thrust, and the force is transmitted to the first driven part 1121 to realize the unlocking action of the lock 112.

[0042] The end surface of the operation tripping end 123 is parallel to the mounting surface of the shell 201, which facilitates the setting of the operation handle 1231. The operation handle 1231 is perpendicular to the end surface of the operation tripping end 123, and the shell 201 is provided with a waist-shaped hole corresponding to the operation tripping end 123, and the operation handle 1231 can extend out of the shell 201 through the waist-shaped hole, that is, the extension direction of the operation handle 1231 is the same as the thickness direction of the shell 201.

[0043] It should be noted that the end face of the operating tripping end 123 can be one or two, and the present application does not make any limitation thereon. When the end face of the operating tripping end 123 is one, at least one side of the end face is provided with the operating handle 1231. That is, one end face can be provided with the operating handle 1231 on one side only, or the operating handle 1231 can be provided on the opposite two sides respectively; when the operating handle 1231 is provided on the opposite two sides respectively, the opposite two sides of the shell 201 are also provided with the waist-shaped holes respectively. Of course, the end face of the operating tripping end 123 can also be two, and the two end faces are spaced apart, and the side away from each other of the two end faces is provided with the operating handle 1231. The operating handle 1231 on the two sides can all serve as the input end to receive external force, and when one side of the operating handle 1231 is damaged, the other side of the operating handle 1231 can still be operated, thereby improving the reliability of tripping; and the operating handle 1231 on the two sides can simultaneously apply force, thereby improving the transmission of torque and further improving the tripping reliability of the tripping device.

[0044] In one specific embodiment of the present application, as shown in Figure 5 , the lock catch 112 has a second driven part 1122; the tripping device further comprises a pushing piece 140 and a thermal tripping piece 160, the pushing piece 140 comprises a first driving face 141 and a second driving face 142, and the deformed end of the thermal tripping piece 160 is arranged on the side of the first driving face 141 away from the second driving face 142, and the second driving face 142 is in driving cooperation with the second driven part 1122; the deformed end of the thermal tripping piece 160 drives the pushing piece 140 to move towards the operating mechanism 110 through the first driving face 141, so as to drive the second driven part 1122 to unlock the lock catch 112 from the jump catch 113.

[0045] Specifically, the second driven part 1122 is an extension rod on the lock catch 112 which cooperates with the pushing piece 140, and its function is to receive the driving force transmitted by the pushing piece 140, so as to drive the lock catch 112 to rotate around the first rotating shaft 170, thereby realizing the unlocking of the jump catch 113.

[0046] The pushing piece 140 is a transmission component connecting the thermal tripping piece 160 and the lock catch 112, and it has the first driving face 141 and the second driving face 142, as shown in Figure 5 , the first driving face 141 and the second driving face 142 are arranged in parallel. The thermal tripping piece 160 is a sensitive element which works on the principle of thermal expansion, and it has a fixed end and a deformed end. The fixed end is fixedly connected with the shell 201, and the deformed end is arranged on the side of the first driving face 141 away from the second driving face 142.

[0047] When the current is overloaded, the thermal trip 160 is bent due to heat, and provides a force to the pusher 140 through the first driving surface 141, which moves towards the operating mechanism 110. At this time, the pusher 140 moves towards the operating mechanism 110 and drives the second driven part 1122 through the second driving surface 142, and the second driven part 1122 is driven to rotate around the first rotation shaft 170 until the lock catch 112 is unlocked from the trip catch 113.

[0048] The thermal trip function of the conventional circuit breaker 200 usually relies on a complex multi-stage transmission structure, while the thermal trip 160 of the present application directly acts on the lock catch 112 through the pusher 140, simplifying the transmission link. The bidirectional driving surface design of the pusher 140 makes the positional relationship between the thermal trip 160 and the lock catch 112 more compact, reduces the setting of the transmission member, and reduces the horizontal size of the device. In addition, the thermal trip path and the external trip path are independent of each other and do not interfere with each other. When the thermal trip is triggered, the external trip mechanism can still work normally, and vice versa. This independence improves the reliability of the circuit breaker 200 under complex working conditions.

[0049] In one specific embodiment of the present application, as shown in Figure 5 the lock catch 112 has a second driven part 1122; the trip device further includes a pusher 140 and an electromagnetic trip assembly 150; the electromagnetic trip assembly 150 includes a push rod; the pusher 140 includes a first driving surface 141 and a second driving surface 142, the push rod is drivingly connected with the first driving surface 141, and the second driving surface 142 is drivingly matched with the second driven part 1122; the push rod drives the pusher 140 to move towards the operating mechanism 110 through the first driving surface 141, so that the second driven part 1122 drives the lock catch 112 to be unlocked from the trip catch 113.

[0050] Specifically, the electromagnetic trip assembly 150 drives the trip structure to move through electromagnetic force in response to a short circuit of the circuit. When the circuit is short-circuited, the electromagnetic trip assembly 150 generates electromagnetic force to push the push rod to move, and the driving connection between the push rod and the first driving surface 141 enables the movement of the push rod to directly drive the first driving surface 141, and in turn drive the pusher 140 to act. At this time, the pusher 140 moves towards the operating mechanism 110 and drives the second driven part 1122 through the second driving surface 142, and the second driven part 1122 is driven to rotate around the first rotation shaft 170 until the lock catch 112 is unlocked from the trip catch 113.

[0051] This direct driving connection eliminates the need for the electromagnetic trip in the prior art to be transferred through other trip assemblies, enabling the driving force generated by the electromagnetic trip to be transmitted more directly and less wastefully to the pusher 140, improving the response speed and effectiveness of the driving force of the electromagnetic trip.

[0052] Optionally, the pushing piece 140 is slidingly connected with the electromagnetic tripping assembly 150, the electromagnetic tripping assembly 150 is arranged on the top of the pushing piece 140, and the tripping accessory 120 is arranged on the side of the electromagnetic tripping assembly 150 away from the pushing piece 140.

[0053] Specifically, the core of the electromagnetic tripping assembly 150 is clamped on the pushing piece 140, and the pushing piece 140 and the electromagnetic tripping assembly 150 form relative sliding, so that the position stability is improved while ensuring the completion of the tripping action. The electromagnetic tripping assembly 150 and the pushing piece 140 are arranged in the up-down direction, the height space inside the circuit breaker 200 is utilized, and the transverse size of the device is reduced; and the tripping accessory 120 is arranged on the side of the electromagnetic tripping assembly 150 away from the pushing piece 140, so that the electromagnetic tripping and the external force tripping are independent of each other and do not affect each other, the reliability of tripping is improved, and the space utilization is further improved and the transverse size of the device is reduced.

[0054] Optionally, as shown in Figure 5 , the electromagnetic tripping assembly 150 is arranged in a first direction a along the housing 201 of the circuit breaker 200, and the tripping accessory 120 is arranged in a second direction b along the housing 201 of the circuit breaker 200, and the first direction a is perpendicular to the second direction b. Through such a layout, the space utilization inside the housing 201 of the circuit breaker 200 is improved, and space is released to realize direct driving of the tripping accessory 120 to unlock the lock catch 112.

[0055] In another aspect of the present application, a circuit breaker 200 is provided, comprising a housing 201, a static contact and a tripping device; the static contact and the tripping device are arranged in the housing 201; the moving contact assembly 111 of the tripping device comprises a moving contact 1112 in contact with or separated from the static contact. The specific structure and advantages of the tripping device have been described in detail above, and will not be repeated here.

[0056] The above-mentioned circuit breaker 200 improves the tripping efficiency and reliability through the arrangement of the tripping device, and reduces the transverse size of the circuit breaker 200. Even if multiple circuit breakers 200 are synchronized to trip, since the tripping force is directly transmitted to the lock catch 112, the action synchronization of multi-stage tripping can be ensured, and the arrangement of the transmission assembly is reduced, thereby effectively reducing the transverse size of the device.

[0057] Optionally, the tripping accessory 120 of the tripping device has a driving part 121; the lock catch 112 of the tripping device has a first driven part 1121, the driving part 121 and the first driven part 1121 are drivingly matched; the housing 201 comprises an upper cover, and a third boss is protruded on the inner wall of the upper cover; when the moving contact 1112 is in contact with the static contact to close, the side of the driving part 121 away from the first driven part 1121 abuts against the third boss.

[0058] Specifically, the third boss is a protruding structure on the inner wall of the upper cover of the shell 201, and preferably, the third boss is integrally injection molded with the upper cover. When the circuit breaker 200 is in the closed state, the side of the driving part 121 away from the first driven part 1121 abuts against the third boss, forming a rigid limit.

[0059] The stability of the conventional circuit breaker 200 in the closed state depends on the self-locking force of the operating mechanism 110, and is prone to mis-tripping due to vibration or electric force. However, the circuit breaker 200 of the present application forms a rigid abutment between the third boss and the driving part 121, so that the buckle connection between the lock catch 112 and the trip catch 113 maintains the contact of the contacts; at the same time, the third boss can limit the rotation of the tripping accessory 120, preventing accidental triggering of the unlocking.

[0060] The above only describes optional embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0061] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

Claims

1. A tripping device, characterized in that, The device includes an operating mechanism (110) that rotates about a first rotating axis (170) and a tripping attachment (120) that rotates about a second rotating axis (180) and cooperates with the operating mechanism (110). The tripping attachment (120) has a driving part (121). The operating mechanism (110) includes a moving contact assembly (111), a latch (112), and a jumper (113). The jumper (113) is connected to the moving contact assembly (111), and the latch (112) and the jumper (113) are engaged. The latch (112) has a first driven part (1121) that drives and cooperates with the driving part (121). The driving part (121) is driven by an external force, and the latch (112) and the jumper (113) are unlocked through the first driven part (1121).

2. The tripping device according to claim 1, characterized in that, The driving part (121) has a first boss (1211) for driving the first driven part (1121) to rotate axially.

3. The tripping device according to claim 2, characterized in that, The first boss (1211) is disposed on the body of the drive unit (121); the moving contact assembly (111) includes a mechanism seat (1114) for setting the moving contact (1112), and the body portion of the drive unit (121) is located between the mechanism seat (1114) and the latch (112) along the axial direction of the first rotation axis (170); the first boss (1211) extends from the body to the latch (112) along the axial direction of the first rotation axis (170).

4. The tripping device according to claim 1, characterized in that, The moving contact assembly (111) has a second boss (1111), and the tripping device further includes a return spring (130) disposed on the tripping attachment (120). The return spring (130) is used to provide a return force to the driving part (121) so that the driving part (121) and the second boss (1111) remain in contact. When the tripping attachment (120) is driven by an external force to unlock the latch (112) and the jumper (113), the return spring (130) is stressed and stores energy.

5. The tripping device according to claim 4, characterized in that, The tripping accessory (120) has an indicator end (122), the end face of which includes an opening indicator surface and a closing indicator surface; the opening indicator surface is used to characterize the separation state of the moving contact assembly (111) and the stationary contact of the circuit breaker (200); the closing indicator surface is used to characterize the contact state of the moving contact assembly (111) and the stationary contact.

6. The tripping device according to claim 1, characterized in that, The drive unit (121) has an operating trip end (123), which has an operating handle (1231) extending outside the housing (201) of the circuit breaker (200). The operating handle (1231) can drive the operating trip end (123) and the first driven part (1121) to rotate axially.

7. The tripping device according to claim 1, characterized in that, The latch (112) has a second driven portion (1122); the release device further includes a pusher (140) and a thermal release member (160). The pusher (140) includes a first driving surface (141) and a second driving surface (142). The deformable end of the thermal release member (160) is disposed on the side of the first driving surface (141) away from the second driving surface (142). The second driving surface (142) drives the second driven portion (1122) to cooperate. The deformable end of the thermal release member (160) drives the pusher (140) to move toward the operating mechanism (110) through the first driving surface (141), so that the second driven portion (1122) drives the latch (112) to unlock from the latch (113).

8. The tripping device according to claim 1, characterized in that, The latch (112) has a second driven portion (1122); the release device further includes a pusher (140) and an electromagnetic release assembly (150); the electromagnetic release assembly (150) includes a push rod; the pusher (140) includes a first driving surface (141) and a second driving surface (142), the push rod is driven to connect with the first driving surface (141), and the second driving surface (142) is driven to cooperate with the second driven portion (1122); the push rod drives the pusher (140) to move toward the operating mechanism (110) through the first driving surface (141), so that the second driven portion (1122) drives the latch (112) to unlock from the latch (113).

9. The tripping device according to claim 8, characterized in that, The pusher (140) is slidably engaged with the electromagnetic tripping assembly (150), the electromagnetic tripping assembly (150) is disposed on the top of the pusher (140), and the tripping attachment (120) is disposed on the side of the electromagnetic tripping assembly (150) away from the pusher (140).

10. The tripping device according to claim 1, characterized in that, The tripping device further includes an electromagnetic tripping assembly (150), which moves along a first direction (a) of the housing (201) of the circuit breaker (200) with the operating mechanism (110); the tripping accessory (120) and the electromagnetic tripping assembly (150) are arranged along a second direction (b) of the housing (201) of the circuit breaker (200), wherein the first direction (a) and the second direction (b) are perpendicular.

11. A circuit breaker, characterized in that, The device includes a housing (201), a stationary contact, and a tripping device according to any one of claims 1-10; the stationary contact and the tripping device are disposed within the housing (201); the moving contact assembly (111) of the tripping device includes a moving contact (1112) that contacts or separates from the stationary contact; the tripping attachment (120) of the tripping device has a driving part (121), and the latch (112) of the tripping device has a first driven part (1121), the driving part (121) drivingly engaging with the first driven part (1121); the housing (201) includes a top cover, and a third protrusion is provided on the inner wall of the top cover; when the moving contact (1112) contacts the stationary contact to close the circuit, the side of the driving part (121) away from the first driven part (1121) abuts against the third protrusion.

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