Tripping structure and circuit breaker

Abstract

This application discloses a tripping structure and circuit breaker, relating to the field of low-voltage electrical appliance technology. It includes a tripping element, an elastic element, a thermal tripping element, and an electromagnetic tripping assembly. The electromagnetic tripping assembly includes a magnetic yoke and an iron core assembly. The tripping element is slidably mounted on the magnetic yoke, and the tripping element and the iron core assembly are arranged adjacent to each other. The thermal tripping element and the electromagnetic tripping assembly are used to independently drive the tripping element to slide relative to the magnetic yoke, thereby actuating the operating mechanism to release the tripping mechanism. The tripping element has a mounting groove, and a channel is formed on the bottom wall of the mounting groove. Part of the magnetic yoke is slidably mounted in the mounting groove via the channel. The elastic element is limited and mounted in the mounting groove via a slot opening. The first end of the elastic element abuts against the tripping element, and the second end abuts against the magnetic yoke. The elastic element provides a restoring force for the sliding of the tripping element relative to the magnetic yoke. This tripping structure integrates the tripping element, elastic element, thermal tripping element, and electromagnetic tripping assembly to solve the problem of excessive space occupation on both sides of the operating mechanism of existing circuit breakers, which is beneficial for product miniaturization.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more specifically, to a tripping structure and a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. When faults such as leakage, overload, or short circuit occur in the system, the circuit breaker can quickly disconnect the faulty circuit or cut off the entire power supply to prevent the fault from escalating and avoid economic losses and personal injury.

[0003] To achieve overload and short-circuit protection, existing circuit breakers typically have two different trip units inside the casing: a thermal trip unit and an electromagnetic trip unit. These two trip units are usually located on opposite sides of the operating mechanism, which occupies space on both sides of the operating mechanism, increasing the difficulty of internal layout and hindering the miniaturization of the circuit breaker. Utility Model Content

[0004] The purpose of this application is to provide a tripping structure and circuit breaker that integrates the tripping element, thermal tripping element and electromagnetic tripping assembly to solve the problem of excessive space occupation on both sides of the operating mechanism of existing circuit breakers, which is conducive to product miniaturization.

[0005] The embodiments of this application are implemented as follows: A first aspect of this application provides a tripping structure, including a tripping member, an elastic member, a thermal tripping member, and an electromagnetic tripping assembly. The electromagnetic tripping assembly includes a magnetic yoke and an iron core assembly mounted on the magnetic yoke. The tripping member is slidably disposed on the magnetic yoke, and the tripping member and the iron core assembly are arranged adjacent to each other. The thermal tripping member and the electromagnetic tripping assembly are respectively driven and cooperated with the tripping member to independently drive the tripping member to slide relative to the magnetic yoke, thereby driving the operating mechanism to trip and unlock. The tripping member has a mounting groove, the opening of which is located on the side of the tripping member away from the iron core assembly. A channel is formed on the bottom wall of the mounting groove, and part of the magnetic yoke is slidably mounted in the mounting groove through the channel. The elastic member is limited and mounted in the mounting groove through the opening. A first end of the elastic member abuts against the tripping member, and a second end abuts against the magnetic yoke. The elastic member is used to provide a restoring force for the sliding of the tripping member relative to the magnetic yoke. This tripping structure integrates the tripping element, thermal tripping element, and electromagnetic tripping assembly to solve the problem of excessive space occupation on both sides of the operating mechanism of existing circuit breakers, which is conducive to product miniaturization.

[0006] In one possible implementation, the magnetic yoke includes a first mounting plate and a second mounting plate disposed opposite to each other, and a connecting plate fixedly connecting the first mounting plate and the second mounting plate. The opposite ends of the iron core assembly are respectively mounted on the first mounting plate and the second mounting plate. A first sliding groove is provided on the side of the first mounting plate away from the iron core assembly, and a second sliding groove is correspondingly provided on the side of the second mounting plate away from the iron core assembly. The opposite ends of the release member are respectively slidably disposed in the first sliding groove and the second sliding groove.

[0007] In one possible implementation, the tripping component includes a push base and a top rod fixedly connected to or integrally formed with the push base. The two opposite ends of the push base are slidably disposed in the first slide groove and the second slide groove. The side of the push base away from the top rod has a first abutting surface, and the end of the top rod away from the push base has a second abutting surface. The deformable end of the thermal tripping component and the electromagnetic tripping assembly abut against the first abutting surface, respectively. The push base can be independently driven to slide in the same direction in the first slide groove and the second slide groove, so as to drive the second abutting surface of the top rod to abut against the operating mechanism, thereby enabling the operating mechanism to unlock.

[0008] In one possible implementation, the mounting groove is disposed on the push seat. The channel includes a first notch and a second notch that are interconnected. The first notch extends along the sliding direction of the tripping member, and the second notch extends perpendicular to the sliding direction of the tripping member. A first protrusion is provided on the side of the first mounting plate away from the iron core assembly, and a second protrusion is correspondingly provided on the side of the second mounting plate away from the iron core assembly. A first guide groove is provided on the side of the second protrusion near the connecting plate. The first protrusion is installed outside the mounting groove, and the second protrusion is slidably disposed in the mounting groove via the first notch and the second notch. The bottom wall of the mounting groove is slidably disposed in the first guide groove. When the tripping member is in a normal state, the side of the first protrusion away from the first abutting surface abuts against the outer wall of the mounting groove near the first abutting surface, and the side of the second protrusion near the second abutting surface abuts against the inner wall of the mounting groove away from the first abutting surface.

[0009] In one possible implementation, the first end of the elastic member abuts against the inner wall of the mounting groove near the first abutting surface, and the second end of the elastic member abuts against the side of the second protrusion away from the second abutting surface. Along the sliding direction perpendicular to the release member, the elastic member is limited by the two opposing inner walls and the bottom wall of the mounting groove.

[0010] As one possible implementation, the push seat is further provided with a guide groove, which is located on the side of the mounting groove near the first abutment surface. The opening of the guide groove is on the same side as the opening of the mounting groove. A third notch and a fourth notch are provided on the bottom wall of the guide groove, which are interconnected. The third notch extends along the sliding direction of the release member, and the fourth notch extends perpendicular to the sliding direction of the release member. A second guide groove is provided on the side of the first boss near the connecting plate. The first boss is slidably disposed in the guide groove via the third notch and the fourth notch, and the bottom wall of the guide groove is slidably disposed in the second guide groove. When the release member is in the release state, the side of the first boss near the first abutment surface abuts against the inner wall of the guide groove away from the second abutment surface.

[0011] As one possible implementation, an assembly hole is provided on the first abutment surface, and the electromagnetic release assembly further includes a push rod. One end of the push rod has an action part, and the other end passes through the assembly hole, the magnetic yoke, and the iron core assembly. The action part abuts against the first abutment surface, and the push rod can be driven to slide the release member through the action part.

[0012] As one possible implementation, along a sliding direction perpendicular to the release member, the mounting groove is located on the side of the first sliding groove that is close to or far from the connecting plate.

[0013] In one possible implementation, the extension direction of the push rod is parallel to or coincides with the line connecting the first slide groove and the second slide groove; and / or, the extension direction of the elastic element is parallel to the line connecting the first slide groove and the second slide groove.

[0014] A second aspect of this application provides a circuit breaker, including a housing, an operating mechanism disposed within the housing, and the aforementioned tripping structure. The tripping structure is driven to move toward the side closer to the operating mechanism, thereby unlocking the operating mechanism and tripping the circuit breaker. This tripping structure integrates the tripping element, the thermal tripping element, and the electromagnetic tripping assembly to solve the problem of excessive space occupation on both sides of the operating mechanism in existing circuit breakers, which is beneficial for product miniaturization.

[0015] The beneficial effects of the embodiments of this application include: The tripping structure includes a tripping element, an elastic element, a thermal tripping element, and an electromagnetic tripping assembly. The electromagnetic tripping assembly includes a magnetic yoke and an iron core assembly mounted on the magnetic yoke. The tripping element is slidably disposed on the magnetic yoke, and the tripping element and the iron core assembly are arranged adjacent to each other. The thermal tripping element and the electromagnetic tripping assembly are respectively driven and cooperate with the tripping element to independently drive the tripping element to slide relative to the magnetic yoke, thereby driving the operating mechanism to trip and unlock. The tripping element has a mounting groove, the opening of which is located on the side of the tripping element away from the iron core assembly. A channel is opened on the bottom wall of the mounting groove, and part of the magnetic yoke is slidably installed in the mounting groove through the channel. The elastic element is limited and installed in the mounting groove through the opening. The first end of the elastic element abuts against the tripping element, and the second end abuts against the magnetic yoke. The elastic element is used to provide a restoring force for the sliding of the tripping element relative to the magnetic yoke. By integrating the tripping element, elastic element, thermal tripping element, and electromagnetic tripping assembly onto the same magnetic yoke carrier, a unified tripping structure is formed. This allows for overload protection via the thermal tripping element and short-circuit protection via the electromagnetic tripping element. Furthermore, the integrated design replaces the traditional separate layout of the thermal and electromagnetic tripping units. Additionally, part of the magnetic yoke is slidably mounted within the mounting groove of the tripping element, and the elastic element is integrated within the mounting groove. This eliminates the need for additional supports or installation space, allowing the elastic element to abut against both the tripping element and the magnetic yoke, and ensuring that the deformation direction of the elastic element aligns with the sliding direction of the tripping element. This prevents the elastic element from being subjected to lateral forces. Simultaneously, the mounting groove allows for controllable deformation of the elastic element, extending its service life. Through these structural and assembly designs, the space occupied on both sides of the operating mechanism is significantly reduced, avoiding an excessively large overall product size caused by the separate arrangement of two tripping units, thus laying the structural foundation for product miniaturization. All core components use a magnetic yoke as a unified mounting carrier. The sliding trajectory of the tripping component, the deformation direction of the elastic component, the action direction of the thermal tripping component, and the thrust direction of the iron core assembly are all limited within a preset range (such as being on or approximately on the same straight line). This can avoid transmission interference caused by component misalignment in traditional distributed layouts, and can also avoid excessive lateral force caused by the installation position and force application position of the tripping device being far apart. Attached Figure Description

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

[0017] Figure 1 A schematic diagram of the circuit breaker in the closed state provided in an embodiment of this application; Figure 2This is one of the structural diagrams of the tripping structure provided in the embodiments of this application in a normal state; Figure 3 A second schematic diagram of the tripping structure provided in the embodiments of this application in a normal state; Figure 4 This is one of the structural diagrams of the tripping structure provided in the embodiments of this application in the tripped state; Figure 5 This is the second schematic diagram of the tripping structure provided in the embodiments of this application in the tripped state; Figure 6 This is a schematic diagram of the structure of the magnetic yoke provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the release element provided in the embodiment of this application.

[0018] Icons: 100-Trigger structure; 10-Trigger component; 11-Push seat; 111-First abutment surface; 1111-Assembly hole; 112-Mounting groove; 1121-First notch; 1122-Second notch; 113-Guide groove; 1131-Third notch; 1132-Fourth notch; 12-Push rod; 121-Second abutment surface; 20-Thermal trigger component; 30-Electromagnetic trigger assembly; 31-Magnetic yoke; 311-First mounting plate; 3111-First slide groove; 3 112-First mounting groove; 3113-First boss; 3114-Second guide groove; 312-Second mounting plate; 3121-Second sliding groove; 3122-Second mounting groove; 3123-Second boss; 3124-First guide groove; 313-Connecting plate; 32-Core assembly; 33-Push rod; 331-Actuating part; 34-Coil; 40-Elastic element; 200-Circuit breaker; 210-Housing; 220-Operating mechanism; 221-Tap latch; 222-Lock. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of this application, 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 is in use. These terms are used only for the convenience of describing this application and for 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 application. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Please refer to the reference. Figures 1 to 7 This application provides a tripping structure 100, including a tripping member 10, an elastic member 40, a thermal tripping member 20, and an electromagnetic tripping assembly 30. The electromagnetic tripping assembly 30 includes a magnetic yoke 31 and an iron core assembly 32 mounted on the magnetic yoke 31. The tripping member 10 is slidably disposed on the magnetic yoke 31, and the tripping member 10 and the iron core assembly 32 are arranged adjacent to each other. The thermal tripping member 20 and the electromagnetic tripping assembly 30 are respectively driven and cooperate with the tripping member 10 to independently drive the tripping member 10 to slide relative to the magnetic yoke 31, thereby driving the operation. Mechanism 220 trips and unlocks; the tripping component 10 has a mounting groove 112, the opening of which is located on the side of the tripping component 10 away from the iron core assembly 32. A channel is provided on the bottom wall of the mounting groove 112, through which part of the magnetic yoke 31 is slidably installed in the mounting groove 112. The elastic element 40 is limited and installed in the mounting groove 112 through the opening. The first end of the elastic element 40 abuts against the tripping component 10, and the second end abuts against the magnetic yoke 31. The elastic element 40 is used to provide a restoring force for the sliding of the tripping component 10 relative to the magnetic yoke 31. This tripping structure 100 integrates the tripping component 10, the thermal tripping component 20, and the electromagnetic tripping assembly 30 to solve the problem of excessive space occupation on both sides of the operating mechanism 220 of the existing circuit breaker 200, which is conducive to product miniaturization.

[0023] It should be noted that the tripping structure 100 includes a tripping element 10, an elastic element 40, a thermal tripping element 20, and an electromagnetic tripping assembly 30. The electromagnetic tripping assembly 30 includes a magnetic yoke 31 and an iron core assembly 32. The iron core assembly 32 is mounted on the magnetic yoke 31, for example, by bolts or by directly embedding it into a pre-set mounting position on the magnetic yoke 31. The tripping element 10 is slidably disposed on the magnetic yoke 31; for example, the magnetic yoke 31 has a groove, and the tripping element 10 is slidably disposed in the groove. Inside, the tripping element 10 and the iron core assembly 32 are arranged adjacent to each other. In other words, the two are close to each other, ensuring that the iron core assembly 32 can reach the tripping element 10 when it is activated. The installation position of the tripping element 10 on the magnetic core and the force-bearing position of the tripping element 10 are on or approximately on the same straight line. The thermal tripping element 20 and the electromagnetic tripping assembly 30 form a driving cooperation relationship with the tripping element 10 respectively. The elastic element 40 is limited and installed in the mounting groove 112 and connected between the tripping element 10 and the magnetic yoke 31.

[0024] Specifically, the release member 10 is provided with a mounting groove 112. The opening of the mounting groove 112 is located on the side of the release member 10 away from the iron core assembly 32, so that the elastic member 40 (such as a compression spring or torsion spring) can be installed in the mounting groove 112 through the opening and will not interfere with the iron core assembly 32 during installation. A channel is opened on the bottom wall of the mounting groove 112 (i.e., the side wall near the iron core assembly 32) so that part of the magnetic yoke 31 can be slidably installed in the mounting groove 112 through the channel. The first end of the elastic member 40 abuts against the release member 10 (such as the inner wall of the mounting groove 112 or the preset abutting surface of the release member 10), and the second end of the elastic member 40 abuts against the magnetic yoke 31 (such as the part slidably installed in the mounting groove 112), ensuring that the elastic member 40 can only deform in the sliding direction of the release member 10 in the mounting groove 112 to store elastic potential energy.

[0025] When an overload current occurs in the thermal trip unit 20, the thermal trip unit 20 deforms or actuates due to heat (such as the bimetallic strip bending due to heat), so as to independently drive the trip unit 10 to slide relative to the magnetic yoke 31. The electromagnetic trip assembly 30 also includes a coil 34 wound around the outer periphery of the iron core assembly 32. When a short-circuit current occurs in the coil 34, an induced magnetic field is generated, which causes the moving iron core and the stationary iron core of the iron core assembly 32 to generate an attraction force, so as to independently drive the trip unit 10 to slide relative to the magnetic yoke 31. Regardless of whether the thermal trip unit 20 or the electromagnetic trip assembly 30 drives it, the trip unit 10 will trigger the operating mechanism 220 after sliding, which will drive the operating mechanism 220 to unlock (such as the jump latch 221 and the lock latch 222 unlock), and finally realize the circuit disconnection protection.

[0026] During the sliding process of the tripping component 10, the elastic element 40 in the mounting groove 112 will be squeezed or stretched, so that the elastic element 40 stores elastic potential energy. When the circuit fault is eliminated (such as the thermal tripping component 20 cooling and resetting after the overload disappears, or the induced magnetic field disappearing after the short circuit disappears), the elastic element 40 releases potential energy and generates a reverse force, pushing the tripping component 10 to slide in the opposite direction relative to the magnetic yoke 31, so that the tripping component 10 slides to the initial position and is ready for the next tripping action.

[0027] The tripping structure 100 provided in this application integrates the tripping element 10, the elastic element 40, the thermal tripping element 20, and the electromagnetic tripping assembly 30 onto the same magnetic yoke 31 carrier, forming an integrated tripping structure 100. It can achieve overload protection through the thermal tripping element 20 and short-circuit protection through the electromagnetic tripping element 10. On this basis, the integrated design replaces the traditional layout where the thermal tripping device and the electromagnetic tripping device are set separately (such as being located on both sides of the operating mechanism 220). In addition, part of the magnetic yoke 31 is slidably installed in the mounting groove 112 of the tripping element 10, and the elastic element 40 is integrated in the mounting groove 112. Without the need for additional brackets or installation space, the elastic element 40 can abut against the tripping element 10 and the magnetic yoke 31 respectively, and the deformation direction of the elastic element 40 is consistent with the sliding direction of the tripping element 10, avoiding the elastic element 40 being subjected to lateral force. At the same time, the mounting groove 112 makes the deformation degree of the elastic element 40 controllable, extending the service life of the elastic element 40. Through the above structural and assembly design, the space occupied on both sides of the operating mechanism 220 is greatly reduced, avoiding the overall size of the product being too large due to the dispersed arrangement of the two trip units, thus laying the foundation for product miniaturization from a structural perspective.

[0028] The integrated design makes the tripping structure 100 an independent module. This independent module uses the magnetic yoke 31 as a carrier. First, the thermal tripping component 20 and the iron core assembly 32 are directly installed on the magnetic yoke 31, and the tripping component 10 is slidably installed on the magnetic yoke 31. At the same time, part of the magnetic yoke 31 is slidably installed in the mounting groove 112 of the tripping component 10. Then, the elastic component 40 is embedded in the mounting groove 112 to complete the installation. There is no need to design independent installation structures for the thermal tripping component 20, the electromagnetic tripping assembly 30 and the elastic component 40. This modular assembly method can reduce the number of parts, assembly steps and alignment difficulty, reduce labor costs, and improve the assembly qualification rate, making it suitable for mass production.

[0029] The trip unit 10, thermal trip unit 20, and core assembly 32 are all arranged adjacent to each other. The action of thermal trip unit 20 or core assembly 32 can directly drive the trip unit 10 to slide, without the need to transmit power through complex linkages or transmission components. The elastic element 40 is integrated between the trip unit 10 and the magnetic yoke 31, and the reset force can be directly applied to the trip unit 10, reducing power loss and action delay. Compared with the long path transmission of "trip unit - linkage or transmission component - operating mechanism 220" in the traditional layout, both tripping drive and reset achieve short path and no redundant transmission, making the tripping response faster (such as quick triggering of tripping in case of short circuit or overload), and improving the timeliness of circuit protection.

[0030] All core components are mounted on the magnetic yoke 31 as a unified mounting carrier. The sliding trajectory of the tripping component 10 (such as along the groove of the magnetic yoke 31), the deformation direction of the elastic component 40, the action direction of the thermal tripping component 20, and the thrust direction of the iron core assembly 32 are all limited within a preset range (such as being on or approximately on the same straight line). This can avoid transmission interference caused by component misalignment in traditional distributed layouts (such as the linkage jamming when the tripping device is activated), and can also avoid excessive lateral force caused by the installation position and the force-bearing position of the tripping device being far apart.

[0031] As one possible implementation method, such as Figures 2 to 6 As shown, the magnetic yoke 31 includes a first mounting plate 311 and a second mounting plate 312 disposed opposite to each other, and a connecting plate 313 fixedly connecting the first mounting plate 311 and the second mounting plate 312. The opposite ends of the iron core assembly 32 are respectively mounted on the first mounting plate 311 and the second mounting plate 312. The side of the first mounting plate 311 away from the iron core assembly 32 is provided with a first sliding groove 3111, and the side of the second mounting plate 312 away from the iron core assembly 32 is provided with a corresponding second sliding groove 3121. The opposite ends of the release member 10 are respectively slidably disposed in the first sliding groove 3111 and the second sliding groove 3121.

[0032] It should be noted that the magnetic yoke 31 includes a first mounting plate 311, a second mounting plate 312, and a connecting plate 313. The first mounting plate 311 and the second mounting plate 312 are arranged opposite to each other (e.g., parallel and spaced apart). The connecting plate 313 is fixedly connected between the first mounting plate 311 and the second mounting plate 312 (e.g., perpendicularly connected to the edges of the first mounting plate 311 and the second mounting plate 312), forming an approximately U-shaped frame structure to provide a mounting base for other components. The opposite ends of the iron core assembly 32 (i.e., the ends of the moving iron core and the stationary iron core that are far apart from each other) are respectively mounted on the first mounting plate 311 and the second mounting plate 312 (e.g., embedded in the first mounting groove 3112 of the first mounting plate 311 and the second mounting groove 3122 of the second mounting plate 312), so that the iron core assembly 32 spans between the two mounting plates and is located inside the magnetic yoke 31.

[0033] The first mounting plate 311 has a first groove 3111 on the side away from the core assembly 32 (i.e., the side of the first mounting plate 311 facing the outside of the magnetic yoke 31), and the second mounting plate 312 has a corresponding second groove 3121 on the side away from the core assembly 32 (i.e., the side of the second mounting plate 312 facing the outside of the magnetic yoke 31). The extension direction of the first groove 3111 and the extension direction of the second groove 3121 are parallel to or coincide with each other. The opposite ends of the release member 10 (i.e., the two sides of the release member 10 corresponding to the first mounting plate 311 and the second mounting plate 312) are respectively embedded in the first groove 3111 and the second groove 3121, so that the release member 10 can slide along the extension direction of the first groove 3111 and the second groove 3121, so as to realize the reciprocating motion of the release member 10 relative to the magnetic yoke 31.

[0034] By creating a groove on the magnetic yoke 31 and sliding the tripping member 10 within the groove, the magnetic yoke 31 serves as a mounting carrier for the tripping member 10, guiding its sliding and ensuring precise contact between the tripping member 10 and the operating mechanism 220. This also reduces the vertical distance between the installation position (i.e., the location of the groove) and the force-bearing position (i.e., the position where the thermal tripping member 20 and the electromagnetic tripping assembly 30 exert force on the tripping member 10), thus reducing the lateral force on the tripping member 10. As one possible implementation, such as... Figures 2 to 7 As shown, the release member 10 includes a push seat 11 and a top rod 12 fixedly connected to or integrally formed with the push seat 11. The two ends of the push seat 11 are slidably disposed in the first slide groove 3111 and the second slide groove 3121. The side of the push seat 11 away from the top rod 12 has a first abutting surface 111, and the end of the top rod 12 away from the push seat 11 has a second abutting surface 121. The deformable end of the thermal release member 20 and the electromagnetic release assembly 30 abut against the first abutting surface 111 respectively, and can independently drive the push seat 11 to slide in the same direction in the first slide groove 3111 and the second slide groove 3121, so as to drive the second abutting surface 121 of the top rod 12 to abut against the operating mechanism 220, so that the operating mechanism 220 can be unlocked.

[0035] It should be noted that the tripping component 10 includes a fixedly connected or integrally formed push seat 11 and push rod 12 to ensure that the push seat 11 and push rod 12 move synchronously and their relative positions remain unchanged. The opposite ends of the push seat 11 are slidably disposed within the first slide groove 3111 and the second slide groove 3121, and can slide in the same direction along the extension direction of the first slide groove 3111 and the second slide groove 3121 (e.g., horizontal direction). A first abutting surface 111 (e.g., a plane or inclined surface) is provided on the side of the push seat 11 away from the push rod 12. The deformable end of the thermal tripping component 20 (e.g., the free end of a bimetallic strip bent by heat) and the push rod 33 of the electromagnetic tripping assembly 30 abut against the first abutting surface 111 respectively (maintaining contact only; the tripping component 10 will not slide when no force is applied). The end of the push rod 12 away from the push seat 11 is provided with a second abutment surface 121 (such as a convex surface or flat surface adapted to the locking 222 of the operating mechanism 220), which is used to contact the operating mechanism 220 and trigger it to unlock.

[0036] When the thermal tripping component 20 deforms due to heat, its deformed end pushes the first abutment surface 111, driving the pusher seat 11 to slide in the same direction along the first slide groove 3111 and the second slide groove 3121. The push rod 12 slides synchronously with the pusher seat 11, and finally abuts against the operating mechanism 220 through the second abutment surface 121, pushing it to unlock. When the electromagnetic tripping component 30 is activated, the moving iron core and the stationary iron core attract each other, causing the push rod 33 to push the first abutment surface 111, driving the pusher seat 11 to slide in the same direction along the first slide groove 3111 and the second slide groove 3121. The push rod 12 slides synchronously with the pusher seat 11, and finally triggers the operating mechanism 220 to unlock through the second abutment surface 121. The two driving methods are independent of each other, but both achieve the unlocking of the operating mechanism 220 through the sliding of the tripping component 10. This ensures that the circuit can reliably trip under different fault scenarios, improving the comprehensiveness of circuit protection.

[0037] The push seat 11 is rigidly connected to the push rod 12. The driving force (from the thermal trip unit 20 or the electromagnetic trip assembly 30) is directly transmitted to the push seat 11 through the first abutment surface 111, and then to the second abutment surface 121 through the push rod 12. The transmission path is short and there are no redundant parts, reducing power loss. At the same time, the groove defines the sliding direction, ensuring that all driving force is converted into the same-direction sliding of the trip unit 10, so that the second abutment surface 121 can accurately act on the operating mechanism 220, improving the efficiency of the tripping action. The trip unit 10 adopts a design that integrates the push seat 11 and the push rod 12 into one piece, which can realize the transmission of force without additional connecting rods or transmission components. Compared with the traditional separate drive structure (such as the thermal trip unit and the electromagnetic trip unit driving the operating mechanism 220 through independent transmission components), there are fewer parts and the structure is more compact. With the guide design of the groove, the space occupied by the tripping structure 100 in the sliding direction perpendicular to the trip unit 10 can be reduced, which helps to miniaturize the product.

[0038] As one possible implementation method, such as Figures 2 to 7 As shown, the mounting groove 112 is disposed on the push base 11. The channel includes a first notch 1121 and a second notch 1122 that are interconnected. The first notch 1121 extends along the sliding direction of the tripping member 10, and the second notch 1122 extends along the sliding direction perpendicular to the tripping member 10. A first boss 3113 is provided on the side of the first mounting plate 311 away from the iron core assembly 32, and a second boss 3123 is correspondingly provided on the side of the second mounting plate 312 away from the iron core assembly 32. A first guide groove 3124 is provided on the side of the second boss 3123 near the connecting plate 313. The first protrusion 3113 is installed outside the mounting groove 112, and the second protrusion 3123 is slidably disposed in the mounting groove 112 via the first notch 1121 and the second notch 1122. The bottom wall of the mounting groove 112 is slidably disposed in the first guide groove 3124. When the release member 10 is in the normal state, the side of the first protrusion 3113 away from the first abutting surface 111 abuts against the outer wall of the mounting groove 112 near the first abutting surface 111, and the side of the second protrusion 3123 near the second abutting surface 121 abuts against the inner wall of the mounting groove 112 away from the first abutting surface 111.

[0039] It should be noted that the mounting groove 112 is opened on the push seat 11 of the release member 10. The channel includes a first notch 1121 and a second notch 1122 that are interconnected. The first notch 1121 extends along the sliding direction of the release member 10, and the second notch 1122 extends along the sliding direction perpendicular to the sliding direction of the release member 10 (if the sliding direction of the release member 10 is horizontal, then the vertical direction is vertical). The first mounting plate 311 is provided with a first boss 3113 (such as a block-shaped protrusion, the size of which is adapted to the outer side of the mounting groove 112) on the side away from the iron core assembly 32 (i.e. the side facing the push seat 11). The second mounting plate 312 is provided with a second boss 3123 (located on the same side as the first boss 3113, the size of which is adapted to the inner side of the mounting groove 112) on the side away from the iron core assembly 32. The second boss 3123 is provided with a first guide groove 3124 on the side near the connecting plate 313. The first boss 3113 is installed on the outside of the mounting groove 112 and can fit against the outer wall of the mounting groove 112 facing the first mounting plate 311. The second boss 3123 is embedded in the interior of the mounting groove 112 through the first notch 1121 and the second notch 1122. The bottom wall of the mounting groove 112 is slidably disposed in the first guide groove 3124 so that the release member 10 and the magnetic yoke 31 form a mutually embedded sliding structure. Thus, the push seat 11 can slide relative to the magnetic yoke 31 along the sliding groove, the bottom wall of the mounting groove 112 can slide relative to the magnetic yoke 31 along the guide groove, and the second boss 3123 can slide relative to the release member 10 along the mounting groove 112 under the avoidance action of the first notch 1121, thereby ensuring that the second boss 3123 can move synchronously in the mounting groove 112 with the sliding of the release member 10.

[0040] When there are no overloads, short circuits, or other faults in the circuit, the thermal tripping component 20 does not deform, the electromagnetic tripping assembly 30 does not activate, and the tripping component 10 does not slide. At this time, the tripping component 10 is in a normal state. The initial position of the tripping component 10 is limited by the following two sets of abutment relationships to avoid unexpected sliding caused by vibration or shaking when there is no fault in the circuit: First set, the side of the first boss 3113 away from the first abutment surface 111 abuts against the outer wall of the mounting groove 112 near the first abutment surface 111 (i.e., the outer side of the mounting groove 112 facing the first boss 3113, and the outer side is close to the first abutment surface 111 of the push seat 11); Second set, the side of the second boss 3123 near the second abutment surface 121 abuts against the inner wall of the mounting groove 112 away from the first abutment surface 111 (i.e., the inner side of the mounting groove 112 facing the second boss 3123, and the inner side is away from the first abutment surface 111 of the push seat 11).

[0041] As one possible implementation method, such as Figures 2 to 4 As shown, the first end of the elastic member 40 abuts against the inner wall of the mounting groove 112 near the first abutting surface 111, and the second end of the elastic member 40 abuts against the side of the second boss 3123 away from the second abutting surface 121. Along the sliding direction perpendicular to the release member 10, the elastic member 40 is limited by the two opposing inner walls and the bottom wall of the mounting groove 112.

[0042] It should be noted that when the second boss 3123 of the second mounting plate 312 is slidably disposed in the mounting groove 112, the opposite ends of the elastic member 40 abut against the release member 10 and the magnetic yoke 31 respectively. Specifically, the first end of the elastic member 40 abuts against the inner wall of the mounting groove 112 near the first abutting surface 111, and the second end abuts against the side of the second boss 3123 away from the second abutting surface 121. This allows the elastic member 40 to be stably compressed and store the reset force when the release member 10 slides, and releases the reset force when resetting, pushing the release member 10 to slide to the initial position. Along the direction perpendicular to the sliding direction of the tripping member 10 (if the sliding direction of the tripping member 10 is horizontal, then the vertical direction is the vertical direction), the elastic member 40 is limited by the two opposing inner walls (i.e., the upper wall and the lower wall) and the bottom wall of the mounting groove 112. On the side opposite to the bottom wall of the mounting groove 112, the housing 210 of the circuit breaker limits the elastic member 40, forming a lateral wrapping constraint on the elastic member 40, restricting its offset or sway in the vertical direction.

[0043] As one possible implementation method, such as Figures 2 to 7As shown, the push base 11 is also provided with a guide groove 113. The guide groove 113 is located on the side of the mounting groove 112 near the first abutment surface 111. The opening of the guide groove 113 is on the same side as the opening of the mounting groove 112. The bottom wall of the guide groove 113 is provided with a third notch 1131 and a fourth notch 1132 that are interconnected. The third notch 1131 extends along the sliding direction of the release member 10, and the fourth notch 1132 extends along the direction perpendicular to the sliding direction of the release member 10. The first boss 3113 is provided with a second guide groove 3114 on the side near the connecting plate 313. The first boss 3113 is slidably disposed in the guide groove 113 via the third notch 1131 and the fourth notch 1132, and the bottom wall of the guide groove 113 is slidably disposed in the second guide groove 3114. When the release member 10 is in the release state, the side of the first boss 3113 near the first abutting surface 111 abuts against the inner wall of the guide groove 113 away from the second abutting surface 121.

[0044] It should be noted that the push base 11 is also provided with a guide groove 113. The opening of the guide groove 113 and the opening of the mounting groove 112 are located on the same side of the magnetic yoke 31 (i.e. the side away from the iron core assembly 32). The guide groove 113 is located on the side of the mounting groove 112 that is close to the first abutment surface 111. In other words, the guide groove 113 and the mounting groove 112 are distributed sequentially on the push base 11 along the sliding direction of the release member 10. Compared with the mounting groove 112, the guide groove 113 is closer to the first abutment surface 111. The bottom wall of the guide groove 113 is provided with a third notch 1131 and a fourth notch 1132 that are interconnected. The third notch 1131 extends along the sliding direction of the release member 10, and the fourth notch 1132 extends along the sliding direction perpendicular to the sliding direction of the release member 10 (if the sliding direction of the release member 10 is horizontal, then the vertical direction is vertical). The first boss 3113 is provided with a second guide groove 3114 on the side near the connecting plate 313, which corresponds to the position of the first guide groove 3124. Similarly to the second boss 3123, the first boss 3113 is embedded in the interior of the guide groove 113 through the third notch 1131 and the fourth notch 1132, and the bottom wall of the guide groove 113 is slidably disposed in the second guide groove 3114, so that the release member 10 and the magnetic yoke 31 form a mutually embedded sliding structure. Thus, except that the push seat 11 can slide relative to the magnetic yoke 31 along the slide groove, the bottom wall of the mounting groove 112 can slide relative to the magnetic yoke 31 along the guide groove, and the second boss 3123 can slide relative to the release member 10 along the mounting groove 112 under the avoidance action of the first notch 1121, the first boss 3113 can slide relative to the release member 10 along the guide groove 113 under the avoidance action of the third notch 1131, thereby ensuring that the first boss 3113 can move synchronously in the release direction in the guide groove 113 with the sliding of the release member 10.

[0045] When the circuit experiences overload, short circuit or other faults, the thermal tripping component 20 or the electromagnetic tripping component 30 independently drives the tripping component 10 to slide along the slide groove, triggering the operating mechanism 220 to unlock. At this time, the tripping component 10 is in the tripped state. The side of the first boss 3113 near the first abutting surface 111 abuts against the inner wall of the guide groove 113 away from the second abutting surface 121 (i.e., the inner side of the guide groove 113 that is farther from the second abutting surface 121 of the top rod 12). Through the above abutting relationship, the tripping component 10 can be prevented from continuing to slide in the reset direction, limiting the maximum sliding stroke of the tripping component 10.

[0046] As one possible implementation method, such as Figures 2 to 7 As shown, the first abutment surface 111 is provided with an assembly hole 1111. The electromagnetic release assembly 30 also includes a push rod 33. One end of the push rod 33 has an action part 331, and the other end passes through the assembly hole 1111, the magnetic yoke 31 and the iron core assembly 32. The action part 331 abuts against the first abutment surface 111. When the push rod 33 is driven, it can drive the release member 10 to slide through the action part 331.

[0047] It should be noted that the first abutment surface 111 of the push seat 11 is provided with an assembly hole 1111 (such as a through hole, the size of which should be adapted to the size of the push rod 33); the electromagnetic release assembly 30 also includes a push rod 33, one end of which is provided with an action part 331 (such as a circular end or a plate-shaped boss, the area of ​​which should be larger than the rod body of the push rod 33), and the other end is sequentially inserted into the assembly hole 1111, the magnetic yoke 31 (such as the first mounting groove 3112 on the first mounting plate 311) and the iron core assembly 32 (such as the central through hole of the moving iron core), forming an assembly structure in which "the rod body of the push rod 33 passes through the push seat 11, the magnetic yoke 31 and the iron core assembly 32, and the action part 331 of the push rod 33 abuts against the first abutment surface 111".

[0048] When a short-circuit current occurs in the circuit, the coil 34 generates an induced magnetic field. The iron core assembly 32 moves under the action of electromagnetic force (such as the moving iron core and the stationary iron core attracting each other), which pushes the push rod 33 inside it to move along its axis. The push rod 33 transmits power through the rod body, causing the action part 331 to push the first abutment surface 111 synchronously, thereby driving the entire tripping component 10 (i.e., the push seat 11 and the push rod 12) to slide along the first slide groove 3111 and the second slide groove 3121. Finally, the operation mechanism 220 is triggered to unlock through the second abutment surface 121 of the push rod 12, thereby realizing the tripping function of electromagnetic tripping.

[0049] As one possible implementation method, such as Figures 2 to 7As shown, along the sliding direction perpendicular to the tripping member 10, the mounting groove 112 is located on the side of the first slide groove 3111 near the connecting plate 313; or, in other embodiments, along the sliding direction perpendicular to the tripping member 10, the mounting groove 112 is located on the side of the first slide groove 3111 away from the connecting plate 313. Neither layout affects the sliding function of the tripping member 10 along the slide groove. By simply adjusting the lateral position of the mounting groove 112 and the first slide groove 3111, different internal space requirements can be accommodated. Those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific limitations are made here.

[0050] As one possible implementation method, such as Figures 2 to 4 As shown, the extension direction of the push rod 12 is parallel to or coincides with the line connecting the first slide groove 3111 and the second slide groove 3121; and / or, the extension direction of the elastic element 40 is parallel to the line connecting the first slide groove 3111 and the second slide groove 3121.

[0051] It should be noted that the extension direction of the push rod 12 (i.e., the length direction of the push rod 12 extending from one end near the push seat 11 to the second abutment surface 121) is parallel to or completely coincident with the line connecting the first slide groove 3111 and the second slide groove 3121 (if the first slide groove 3111 and the second slide groove 3121 are parallel and correspondingly arranged, the line connecting the two is the extension direction of the slide groove, which is also the sliding direction of the release member 10). This consistent design ensures that the push rod 12 can slide synchronously with the release member 10 along the slide groove direction, which can reduce the lateral force on the push rod 12.

[0052] The extension direction of the elastic element 40 (i.e., the length direction of the elastic element 40 extending from the inner wall of the mounting groove 112 to the second boss 3123, which is also the deformation direction of the elastic element 40 during compression or reset) is parallel to the line connecting the first slide groove 3111 and the second slide groove 3121. This directional matching ensures that the deformation of the elastic element 40 can be precisely along the sliding direction of the tripping element 10, ensuring that the reset force is fully applied to the tripping sliding trajectory. The two directions can exist independently (e.g., only the direction of the top rod 12 is parallel, or only the direction of the elastic element 40 is parallel), or they can exist simultaneously, jointly ensuring the motion coordination of the tripping structure 100.

[0053] This application embodiment also provides a circuit breaker 200, including a housing 210, an operating mechanism 220 disposed within the housing 210, and the aforementioned tripping structure 100. The tripping structure 100 is driven to move toward the side closer to the operating mechanism 220, thereby unlocking the operating mechanism 220 and tripping the circuit breaker 200. Since the structure and beneficial effects of the tripping structure 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0054] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0055] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. A tripping structure, characterized in that, The system includes a tripping element (10), an elastic element (40), a thermal tripping element (20), and an electromagnetic tripping assembly (30). The electromagnetic tripping assembly (30) includes a magnetic yoke (31) and an iron core assembly (32) mounted on the magnetic yoke (31). The tripping element (10) is slidably disposed on the magnetic yoke (31), and the tripping element (10) and the iron core assembly (32) are arranged adjacent to each other. The thermal tripping element (20) and the electromagnetic tripping assembly (30) are respectively driven and cooperate with the tripping element (10) to independently drive the tripping element (10) to slide relative to the magnetic yoke (31), thereby driving the operating mechanism (220) to trip and unlock. The fastener (10) has a mounting groove (112), the opening of which is located on the side of the release member (10) away from the iron core assembly (32). A channel is provided on the bottom wall of the mounting groove (112), and part of the magnetic yoke (31) is slidably installed in the mounting groove (112) through the channel. The elastic member (40) is limited and installed in the mounting groove (112) through the opening. The first end of the elastic member (40) abuts against the release member (10) and the second end abuts against the magnetic yoke (31). The elastic member (40) is used to provide a restoring force for the sliding of the release member (10) relative to the magnetic yoke (31).

2. The tripping structure according to claim 1, characterized in that, The magnetic yoke (31) includes a first mounting plate (311) and a second mounting plate (312) arranged opposite to each other, and a connecting plate (313) that is fixedly connected to the first mounting plate (311) and the second mounting plate (312). The opposite ends of the core assembly (32) are respectively mounted on the first mounting plate (311) and the second mounting plate (312). The side of the first mounting plate (311) away from the core assembly (32) is provided with a first sliding groove (3111), and the side of the second mounting plate (312) away from the core assembly (32) is provided with a corresponding second sliding groove (3121). The opposite ends of the release member (10) are respectively slidably disposed in the first sliding groove (3111) and the second sliding groove (3121).

3. The tripping structure according to claim 2, characterized in that, The release member (10) includes a push seat (11) and a top rod (12) fixedly connected to or integrally formed with the push seat (11). The two ends of the push seat (11) are slidably disposed in the first slide groove (3111) and the second slide groove (3121). The side of the push seat (11) away from the top rod (12) has a first abutting surface (111), and the end of the top rod (12) away from the push seat (11) has a second abutting surface (121). The deformed end of the thermal release member (20) and the electromagnetic release assembly (30) abut against the first abutting surface (111) respectively, and can independently drive the push seat (11) to slide in the same direction in the first slide groove (3111) and the second slide groove (3121) to drive the second abutting surface (121) of the top rod (12) to abut against the operating mechanism (220), so that the operating mechanism (220) can be unlocked.

4. The tripping structure according to claim 3, characterized in that, The mounting groove (112) is disposed on the push seat (11). The channel includes a first notch (1121) and a second notch (1122) that are interconnected. The first notch (1121) extends along the sliding direction of the release member (10), and the second notch (1122) extends along the sliding direction perpendicular to the release member (10). A first boss (3113) is provided on the side of the first mounting plate (311) away from the iron core assembly (32), and a second boss (3123) is correspondingly provided on the side of the second mounting plate (312) away from the iron core assembly (32). A first guide groove (3124) is provided on the side of the second boss (3123) near the connecting plate (313). The boss (3113) is installed outside the mounting groove (112), and the second boss (3123) is slidably disposed in the mounting groove (112) via the first notch (1121) and the second notch (1122). The bottom wall of the mounting groove (112) is slidably disposed in the first guide groove (3124). When the release member (10) is in the normal state, the side of the first boss (3113) away from the first abutting surface (111) abuts against the outer wall of the mounting groove (112) near the first abutting surface (111), and the side of the second boss (3123) near the second abutting surface (121) abuts against the inner wall of the mounting groove (112) away from the first abutting surface (111).

5. The tripping structure according to claim 4, characterized in that, The first end of the elastic member (40) abuts against the inner wall of the mounting groove (112) near the first abutting surface (111), and the second end of the elastic member (40) abuts against the side of the second boss (3123) away from the second abutting surface (121). Along the sliding direction perpendicular to the release member (10), the elastic member (40) is limited by the two opposing inner walls and bottom wall of the mounting groove (112).

6. The tripping structure according to claim 4, characterized in that, The push base (11) is also provided with a guide groove (113), which is located on the side of the mounting groove (112) near the first abutment surface (111). The opening of the guide groove (113) is on the same side as the opening of the mounting groove (112). A third notch (1131) and a fourth notch (1132) are provided on the bottom wall of the guide groove (113). The third notch (1131) extends along the sliding direction of the release member (10), and the fourth notch (1132) extends perpendicular to the sliding direction of the release member (10). The first boss (3113) is provided with a second guide groove (3114) on the side near the connecting plate (313). The first boss (3113) is slidably disposed in the guide groove (113) via the third notch (1131) and the fourth notch (1132), and the bottom wall of the guide groove (113) is slidably disposed in the second guide groove (3114). When the release member (10) is in the release state, the side of the first boss (3113) near the first abutting surface (111) abuts against the inner wall of the guide groove (113) away from the second abutting surface (121).

7. The tripping structure according to claim 4, characterized in that, The first abutment surface (111) is provided with an assembly hole (1111). The electromagnetic release assembly (30) also includes a push rod (33). One end of the push rod (33) has an action part (331), and the other end passes through the assembly hole (1111), the magnetic yoke (31), and the iron core assembly (32). The action part (331) abuts against the first abutment surface (111). When the push rod (33) is driven, it can drive the release member (10) to slide through the action part (331).

8. The tripping structure according to claim 7, characterized in that, Along the sliding direction perpendicular to the release member (10), the mounting groove (112) is located on the side of the first slide groove (3111) that is close to or far from the connecting plate (313).

9. The tripping structure according to claim 3, characterized in that, The extension direction of the top rod (12) is parallel to or coincides with the line connecting the first slide groove (3111) and the second slide groove (3121); and / or, the extension direction of the elastic element (40) is parallel to the line connecting the first slide groove (3111) and the second slide groove (3121).

10. A circuit breaker, characterized in that, The circuit breaker (200) includes a housing (210), an operating mechanism (220) disposed within the housing (210), and a tripping structure (100) as described in any one of claims 1 to 9. The tripping structure (100) is driven to move toward the side closer to the operating mechanism (220) to unlock the operating mechanism (220) and the circuit breaker (200) is tripped.

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