breaker

Abstract

This invention relates to the field of low-voltage electrical appliances, specifically to a circuit breaker, which includes a circuit breaker housing and an operating mechanism, a contact system, incoming terminals, outgoing terminals, an arc-extinguishing chamber, and a thermomagnetic tripping mechanism disposed within the circuit breaker housing. The contact system includes a first contact structure and a second contact structure that are synchronously rotated. Along the height of the circuit breaker, the operating element of the operating mechanism, the contact system, and the arc-extinguishing chamber are arranged sequentially. Along the length of the circuit breaker, the incoming and outgoing terminals are located at both ends of the circuit breaker, the contact system and the arc-extinguishing chamber are located between the incoming and outgoing terminals, the contact system and the arc-extinguishing chamber are located on one side of the thermomagnetic tripping mechanism, and either the incoming or outgoing terminal is located on the other side of the thermomagnetic tripping mechanism. The first contact structure and the second contact structure are arranged side-by-side. The circuit breaker has a more rational internal layout, providing more assembly space for the arc-extinguishing chamber.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0002] The internal layout of existing circuit breakers limits the installation space for arc-extinguishing chambers, making it impossible to accommodate larger arc-extinguishing chambers, thus affecting the arc-extinguishing and breaking capacity of the circuit breakers. Moreover, due to the internal space limitations of existing circuit breakers, the opening distance of the contact system cannot be significantly increased, which restricts the improvement of the breaking capacity of the circuit breaker. Summary of the Invention

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a circuit breaker with a more reasonable internal layout, providing more assembly space for the arc-extinguishing chamber.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A circuit breaker includes a circuit breaker housing and an operating mechanism, a contact system, incoming terminals, outgoing terminals, an arc-extinguishing chamber, and a thermomagnetic tripping mechanism disposed within the circuit breaker housing; the contact system includes a first contact structure and a second contact structure that are synchronously rotated.

[0006] In the height direction of the circuit breaker, the operating mechanism, the contact system, and the arc-extinguishing chamber are arranged sequentially.

[0007] Along the length of the circuit breaker, the incoming and outgoing terminals are located at both ends of the circuit breaker, the contact system and the arc-extinguishing chamber are located between the incoming and outgoing terminals, the contact system and the arc-extinguishing chamber are located on one side of the thermomagnetic tripping mechanism, and the incoming or outgoing terminals are located on the other side of the thermomagnetic tripping mechanism. The first contact structure and the second contact structure are arranged side by side.

[0008] Furthermore, the incoming terminal, the first contact structure, the second contact structure, and the outgoing terminal are arranged side by side in sequence along the length of the circuit breaker; the arc inlet of the arc extinguishing chamber is aligned with the breaking interval formed by the separation of the first contact structure and the second contact structure and faces the operating element.

[0009] Furthermore, the operating mechanism also includes a main connecting rod, a trip latch, and a locking latch. The first contact structure includes a first support and a first contact. The first support is pivotally mounted inside the circuit breaker housing. The first contact is mounted on the first support and rotates synchronously with the first support under its drive. The trip latch and the locking latch are pivotally mounted on the first support and are engaged with each other. The two ends of the main connecting rod are respectively hinged to the operating component and the trip latch.

[0010] Furthermore, the operating mechanism also includes a linkage rocker arm, which is coaxial with and synchronously rotates with the latch. In the thickness direction of the circuit breaker, the linkage rocker arm and the latch are located on both sides of the first support. The thermal-magnetic tripping mechanism includes a thermal tripping structure and a magnetic tripping structure. The thermal tripping structure is used to release the latch from its latching engagement with the tripping latch by driving the latch to rotate when an overload fault occurs in the circuit where the circuit breaker is located. The magnetic tripping structure is used to directly drive the latch to rotate to release its latching engagement with the tripping latch when a short circuit fault occurs in the circuit where the circuit breaker is located. When multiple circuit breakers are arranged side by side in linkage, in two adjacent circuit breakers, the latch of one circuit breaker is driven and connected to the linkage rocker arm of the other circuit breaker.

[0011] Furthermore, the thermal-magnetic tripping mechanism includes a thermal tripping structure for driving the operating mechanism to trip when an overload fault occurs in the circuit where the circuit breaker is located, and a magnetic tripping structure for driving the operating mechanism to trip when a short circuit fault occurs in the circuit where the circuit breaker is located. The thermal tripping structure and the magnetic tripping structure are arranged side by side in the height direction of the circuit breaker.

[0012] Furthermore, along the length of the circuit breaker, the thermal trip structure is located between the contact system and the incoming or outgoing terminals, and the magnetic trip structure is located between the arc-extinguishing chamber and the incoming or outgoing terminals.

[0013] Furthermore, the circuit breaker also includes an arc-starting plate electrically connected to the outgoing terminals and located between the outgoing terminals and the arc-extinguishing chamber in the longitudinal direction of the circuit breaker.

[0014] Furthermore, the thermomagnetic tripping mechanism also includes a pivotally mounted thermal tripping transmission component, and the thermal tripping structure includes a bimetallic assembly, with the thermal tripping transmission component located between the operating mechanism and the bimetallic assembly.

[0015] Furthermore, the thermomagnetic tripping mechanism also includes a pivotally mounted magnetic tripping transmission component. The magnetic tripping structure is a snap-action electromagnetic tripping device, which includes a pivotally mounted armature. The magnetic tripping transmission component is located between the operating mechanism and the armature. The rotation centers of the operating mechanism's latch, the magnetic tripping transmission component, and the thermomagnetic tripping transmission component are respectively located at the three vertices of a triangle.

[0016] Furthermore, the thermomagnetic tripping mechanism also includes a pivotally mounted magnetic tripping transmission component. The magnetic tripping structure is a direct-acting electromagnetic trip unit. The magnetic tripping transmission component is located between the operating mechanism and the magnetic tripping structure. One end of the magnetic tripping transmission component is in transmission cooperation with the operating mechanism, and the other end is in transmission cooperation with the top rod of the direct-acting electromagnetic trip unit.

[0017] Furthermore, the contact system also includes a separator located between the first contact structure and the second contact structure along the length of the circuit breaker. The separator includes a separating portion. When the first contact structure and the second contact structure are closed, the separator is driven to move the separating portion out from between the first contact point of the first contact structure and the second contact point of the second contact structure. When the first contact structure and the second contact structure are open, the separator is driven to move the separating portion into the space between the first contact point and the second contact point.

[0018] Furthermore, the arc-extinguishing chamber includes multiple arc-extinguishing grid plates, which are arranged side by side at intervals along the length of the circuit breaker; the rotation centers of the operating element, the first contact structure, and the second contact structure are located at the three vertices of an acute triangle.

[0019] Furthermore, the circuit breaker housing has a U-shaped structure, the operating components of the operating mechanism are located at the upper part of the U-shaped structure, the arc extinguishing chamber is located at the lower part of the U-shaped structure, the incoming terminal and the outgoing terminal are located at both ends of the lower part of the U-shaped structure, and the contact system is located at the junction of the upper and lower parts of the U-shaped structure.

[0020] Furthermore, the thermal-magnetic tripping mechanism includes a thermal tripping structure, a thermal tripping transmission component, a magnetic tripping structure, and a magnetic tripping transmission component. The thermal tripping transmission component is located at the upper part of the U-shaped structure, and the thermal tripping structure extends from the lower part of the U-shaped structure to the upper part. In the length direction of the circuit breaker, the upper ends of the operating component, the thermal tripping transmission component, and the thermal tripping structure are arranged side by side. The magnetic tripping transmission component and the magnetic tripping structure are located at the lower part of the U-shaped structure. In the height direction of the circuit breaker, the magnetic tripping transmission component and the magnetic tripping structure are arranged side by side. In the length direction of the circuit breaker, the magnetic tripping transmission component is located between the contact system and the incoming terminal, and the magnetic tripping structure is located between the arc-extinguishing chamber and the incoming terminal.

[0021] Furthermore, the first contact structure and the second contact structure are symmetrically and synchronously arranged to rotate.

[0022] The circuit breaker of the present invention has a reasonable and compact layout, which provides more assembly space for the arc-extinguishing chamber and allows for the installation of larger arc-extinguishing chambers, thereby improving the arc-extinguishing performance and breaking performance of the circuit breaker. Moreover, the synchronous rotation of the first contact structure and the second contact structure not only doubles the breaking speed of the contact system but also doubles the opening distance, which is beneficial to improving the short-circuit breaking performance and current carrying capacity.

[0023] Furthermore, the latch and the linkage rocker arm cooperate with the thermal release structure and the magnetic release structure of the thermomagnetic release mechanism, respectively, providing more options for the cooperation points between the operating mechanism and the thermomagnetic release mechanism, which facilitates layout and structural design. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the circuit breaker of the present invention. The contact system is in the disconnected state and is equipped with the thermomagnetic tripping mechanism of the first embodiment.

[0025] Figure 2 This is a schematic diagram of the circuit breaker of the present invention. The contact system is in a closed state and it is equipped with a thermomagnetic tripping mechanism according to the first embodiment.

[0026] Figure 3 This is a schematic diagram of the structure of the housing base of the circuit breaker housing of the present invention;

[0027] Figure 4 This is a schematic diagram of the trip latch and lock latch of the operating mechanism of the present invention, the first contact structure, and the thermomagnetic tripping mechanism, wherein the trip latch, lock latch and the first contact structure are in an assembled state;

[0028] Figure 5a This is a schematic diagram of the operating mechanism of the present invention, including the trip latch, locking latch, and linkage rocker arm, the first contact structure, and the thermomagnetic tripping mechanism, wherein the trip latch, locking latch, and first contact structure are in an assembled state, and the linkage rocker arm and first contact structure are in an exploded state;

[0029] Figure 5b This is the present invention. Figure 5a An enlarged structural diagram of part A;

[0030] Figure 6 This is a three-dimensional structural diagram of the contact system according to the first embodiment of the present invention;

[0031] Figure 7 This is a schematic projection of the contact system according to the first embodiment of the present invention, showing the cooperation relationship between the separator and the first support;

[0032] Figure 8 This is a three-dimensional structural schematic diagram of the separator according to the first embodiment of the present invention;

[0033] Figure 9a This is a schematic diagram of the first contact structure and the second contact structure according to the first embodiment of the present invention;

[0034] Figure 9b This is a schematic diagram of the first contact structure and the second contact structure according to the first embodiment of the present invention, and also shows the assembly relationship between the second reset spring and the second support;

[0035] Figure 10 This is a schematic diagram of the second contact structure according to the first embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the first contact in the first embodiment of the present invention;

[0037] Figure 12This is a cross-sectional view of the first contact structure according to the first embodiment of the present invention;

[0038] Figure 13 This is a schematic diagram of the structure of the linkage rocker arm of the present invention;

[0039] Figure 14 This is a schematic diagram of the structure of the thermal release transmission component of the present invention;

[0040] Figure 15 This is a schematic diagram of the thermomagnetic tripping mechanism according to the first embodiment of the present invention;

[0041] Figure 16 This is a schematic diagram of the assembly structure of the magnetic yoke and armature of the magnetic release structure of the thermomagnetic release mechanism according to the first embodiment of the present invention;

[0042] Figure 17 This is a schematic diagram of the current-carrying conductive plate of the present invention;

[0043] Figure 18 This is a schematic diagram of the contact system according to the second embodiment of the present invention;

[0044] Figure 19 This is a schematic diagram of the circuit breaker of the present invention. The contact system is in the disconnected state and it is equipped with a thermomagnetic tripping mechanism according to the second embodiment.

[0045] Figure 20 This is a schematic diagram of the thermomagnetic tripping mechanism according to the second embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] h Switch housing; h21 First contact shaft slot; h22 Second contact shaft hole; h23 First guide groove; h55 Thermal trip lever shaft;

[0048] 1. Operating mechanism; 11. Operating component; 11s. Fifth center; 12. Main connecting rod; 13. Jumper; 14. Lock; 140. Lock body; 141. Lock first arm; 142. Lock second arm; 1420. Lock second arm connecting part; 1421. Lock second arm driven part; 14-15. Linkage shaft; 15. Linked rocker arm; 150. Rocker arm mounting part; 1500. Rocker arm mounting hole; 151. Rocker first arm; 1510. Rocker first arm mating groove; 152. Rocker second arm; 16. Slider; Third center 17s; 17-21. First branch connecting rod; 17-22. Second branch connecting rod;

[0049] 2. Contact system;

[0050] 21 First contact structure; 211 First contact; 2110 First contact point; 2111 First contact arm; 212 First support; 2120 First support body; 21200 First support cavity; 21201 First contact insertion hole; 2121 Main gear; 2122 Separator drive gear; 2123 Jumper shaft; 2124 First support shaft; 2125 First support bearing part; 2126 First contact limiting block; 2127 First contact spring shaft; 2128 Jumper limiting block; 213 First contact spring; 21s First center;

[0051] 22 Second contact structure; 221 Second contact; 2210 Second contact point; 2211 Second contact arm; 222 Second support; 2220 Second support body; 2221 Follower gear; 2222 Second support shaft; 2223 Separator limiting platform; 2224 Second contact limiting block; 22s Second center; 23 Separator; 230 Separator back plate; 231 Separator rack; 232 Separator part; 2320 Separator plate; 2321 Reinforcing connection part; 233 First sliding rib of separator; 234 Second sliding rib of separator;

[0052] 31 Incoming terminal; 32 Outgoing terminal; 33 Current-carrying conductive plate; 330 Conductive plate wiring section; 331 First intermediate section of conductive plate; 332 Second intermediate section of conductive plate; 333 Matching section of conductive plate; 334 Third intermediate section of conductive plate; 335 Double-metal adjustment section of conductive plate; 336 Support arm of conductive plate; 34 Outgoing conductive plate; 35 Arc-starting plate; 36 Incoming conductive plate;

[0053] 4 arc-extinguishing chambers; 40 arc-extinguishing grid plates;

[0054] 5. Thermomagnetic tripping mechanism; 51. Magnetic yoke; 510. Magnetic yoke body; 5100. Magnetic yoke body base plate; 5101. Magnetic yoke body side plate; 511. Magnetic yoke support arm; 5110. Magnetic yoke support groove; 512. Magnetic yoke limiting arm; 52. Armature; 520. Armature main plate; 521. Armature drive plate; 5210. Armature limiting plate; 5211. Armature drive finger; 522. Armature base; 523. Armature hanging spring hole; 53. Armature spring; 54. Magnetic tripping transmission component; 540. Magnetic tripping transmission component mounting part; 541. Magnetic tripping transmission component first arm; 542. Magnetic... Second arm of the tripping transmission component; 543 Reinforcing rib of the magnetic tripping transmission component; 54s Third center; 55 Thermal tripping transmission component; 550 Mounting part of the thermal tripping transmission component; 5500 Mounting hole of the thermal tripping transmission component; 551 Driven arm of the thermal tripping transmission component; 5510 Connecting part of the driven arm of the transmission component; 5511 Driven part of the driven arm of the transmission component; 552 Drive arm of the thermal tripping transmission component; 55s Fourth center; 56 Bimetallic strip; 57 Adjusting screw; 58 Bimetallic bracket; 590 Coil winding; 591 Coil frame; 592 Magnetic yoke; 593 Top rod. Detailed Implementation

[0055] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the switching device of the present invention. The switching device of the present invention is not limited to the descriptions in the following embodiments.

[0056] This invention discloses a switching device, preferably a circuit breaker, comprising a switch housing h and an operating device disposed within the switch housing h. The operating device includes an operating mechanism 1 and a contact system 2, which are driven together to drive the contact system 2 to close or open. Further, the switching device also includes an input terminal 31 and an output terminal 32, with the contact system 2 connected in series between the input terminal 31 and the output terminal 32. The switching device is electrically connected to an external circuit through the input terminal 31 and the output terminal 32.

[0057] like Figure 1-2 As shown in Figures 6-7, the contact system 2 includes a contact mechanism, which includes a first contact structure 21 and a second contact structure 22 arranged opposite to each other. The rotation directions of the first contact structure 21 and the second contact structure 22 are kept opposite. They rotate synchronously towards each other to close and synchronously towards each other to break. That is, the contacts of the first contact structure 21 and the second contact structure 22 (the first contact point 2110 of the first contact structure 21 and the second contact point 2210 of the second contact structure 22) move towards each other to close or move towards each other to break. Furthermore, the first contact structure 21 includes a first support 212 pivotally disposed around a first center 21s and a first contact 211 disposed on the first support 212. The first contact 211 can also be referred to as a first moving contact. The first contact 211 rotates around the first center 21s under the drive of the first support 212, that is, the first support 212 carries the first contact 211 (the first moving contact) and drives it to rotate. The second contact structure 22 includes a first support 222 pivotally disposed around a second center 22s and a second contact 221 disposed on the second support 222. The second contact 221 can also be referred to as a second moving contact. The second contact 221 rotates around the second center 22s under the drive of the second support 222, that is, the second support 222 carries the second contact 221 (the second moving contact) and drives it to rotate.

[0058] The first support 212 and the second support 222 are pivotally mounted on the first support structure, which is implemented by the switch housing h. Further, as... Figure 3 As shown, the switch housing h includes a housing base and a housing cover (not shown in the figure) that are fastened together. The housing base includes a first support shaft and a second support shaft disposed on its base plate. The first support shaft and the second support shaft have a first base shaft hole h21 and a second base shaft hole h22 respectively cooperating with the rotating shafts of the first support 212 and the second support 222 (that is, the first support shaft 2124 and the second support shaft 2222).

[0059] Furthermore, such as Figure 1-2 As shown, the first contact structure 21 and the second contact structure 22 are symmetrically pivoted. Symmetrical pivoting means that the rotation centers of the first contact structure 21 and the second contact structure 22 are symmetrical, and the rotation angles are symmetrical. This allows the first contact structure 21 and the second contact structure 22 to rotate within a limited space while having a larger opening distance, saving internal space in the switching device, improving breaking performance, facilitating design and layout, and enhancing aesthetics. Of course, as another embodiment, the first contact structure 21 and the second contact structure 22 can also be asymmetrically arranged.

[0060] The operating mechanism 1 is drivenly connected to the first contact structure 21 and / or the second contact structure 22 to drive the first contact structure 21 and the second contact structure 22 to rotate synchronously towards each other or synchronously away from each other. Specifically:

[0061] like Figure 1-2 As shown, this is a first implementation where the operating mechanism 1 is driven and connected to the contact system 2: the first contact structure 21 and the second contact structure 22 are driven and rotated in a linked manner (that is, when one of the first contact structure 21 and the second contact structure 22 rotates, the other is directly driven by the former and rotates synchronously). The operating mechanism 1 is driven and connected to the first contact structure 21, driving the first contact structure 21 to rotate. The first contact structure 21 simultaneously drives the second contact structure 22 to rotate, thereby achieving synchronous rotation of the first contact structure 21 and the second contact structure 22 towards each other or synchronous rotation of opposite directions. Alternatively, the operating mechanism 1 can also be driven and connected to the second contact structure 22, driving the second contact structure 22 to rotate. The second contact structure 22 simultaneously drives the first contact structure 21 to rotate, thereby achieving synchronous rotation of the first contact structure 21 and the second contact structure 22 towards each other or synchronous rotation of opposite directions. Furthermore, one end of the first contact structure 21 and the second contact structure 21 are pivotally arranged around the first center 21s and the second center 22s, respectively, and the other end is closed or disconnected to close or disconnect the contact system 2.

[0062] like Figure 9a-11 As shown, this is a first embodiment of the contact system 2. The operating mechanism 1 is linked with the first support 212 of the first contact structure 21, and the first support 212 is linked with the second support 222. The operating mechanism 1 drives the first support 212 to rotate, thereby rotating the first contact 211. The first support 212 also drives the second support 222 to rotate, thereby rotating the second contact. This achieves the synchronous rotation of the first contact 211 and the second contact 221 towards each other or away from each other. Specifically, the first support 212 includes a main gear 2121; the second support 222 includes a driven gear 2221. The main gear 2121 and the driven gear 2221 mesh, realizing the driving cooperation between the first contact structure 21 and the second contact structure 22.

[0063] Furthermore, the axis of the main gear 2121 coincides with the first center 21s, and the axis of the driven gear 2221 coincides with the second center 22s. Of course, the axis of the main gear 2121 may not coincide with the first center 21s, and the axis of the driven gear 2221 may not coincide with the second center 22s.

[0064] Furthermore, both the main gear 2121 and the driven gear 2221 are sector gears.

[0065] like Figure 9a-11 As shown, the first support 212 includes a first support body 2120 pivotally disposed around a first center 21s. The teeth of the main gear 2121 are sequentially arranged on the circumferential sidewall of the first support body 2120 along the circumferential direction. That is, the first support body 2120 and the teeth arranged on the circumferential sidewall of the first support body 2120 form the main gear 2121. The second support 222 includes a second support body 2220 pivotally disposed around a second center 22s. The teeth of the driven gear 2221 are sequentially arranged on the circumferential sidewall of the second support body 2220 along the circumferential direction. That is, the second support body 2220 and the teeth arranged on the circumferential sidewall of the second support body 2220 form the driven gear 2221. The teeth of the main gear 2121 and the driven gear 2221 are located between the first support body 2120 and the second support body 2220 and mesh with each other.

[0066] In other embodiments, the first contact structure 21 and the second contact structure 22 can also be indirectly connected by transmission, that is, the first contact structure 21 and the second contact structure 22 are connected by transmission through a transmission structure independent of the two, so as to realize the linkage of the first contact structure 21 and the second contact structure 22.

[0067] The contact system 2 further includes a contact return spring, which applies a force to the first contact structure 21 or the second contact structure 22, causing the first contact structure 21 and the second contact structure 22 to rotate in opposite directions and break. Further, the contact return spring applies a force to the first support 212 of the first contact structure 21 and / or to the second support 222 of the second contact structure 22, causing the first contact structure 21 and the second contact structure 22 to rotate synchronously in opposite directions and break.

[0068] Specifically, such as Figure 9bAs shown, the second contact structure 22 includes a second return spring 223. The second return spring 223 acts as a contact return spring, applying a force to the second contact structure 22, causing it to rotate towards its breaking position. Simultaneously, the second contact structure 22 drives the first contact structure 21 to rotate towards its breaking position. That is, the second return spring 223 drives the second contact structure 22 and the first contact structure 21 to rotate synchronously in opposite directions, thus breaking the contact. Furthermore, the second return spring 223 is a torsion spring. The second support 222 also includes a second support spring limiting platform 2225. The second return spring 223 and the second support 222 are coaxially arranged. One end of the second return spring 223 engages with the second support spring limiting platform 2225, and the other end engages with the switch housing.

[0069] In another embodiment, the first contact structure 21 is provided with a first return spring, while the second contact structure 22 omits the second return spring. The first return spring applies a force to the first contact structure 21, causing it to rotate towards its breaking position. Simultaneously, the first contact structure 21 drives the second contact structure 22 to rotate towards its breaking position. That is, the first return spring drives the first contact structure 21 and the second contact structure 22 to rotate synchronously in opposite directions, thus breaking the contact. Further, the first return spring is a torsion spring, and its arrangement is similar to that of the second return spring 223.

[0070] In this embodiment of the contact system, since the first contact structure 21 and the second contact structure 22 are symmetrically and synchronously pivoted and are driven together, only one contact return spring is needed, that is, the second return spring 223 or the first return spring, to achieve rapid disconnection of the first contact structure 21 and the second contact structure 22. The structure is simple and the operation is reliable.

[0071] like Figure 1-2 As shown, the operating mechanism 1 includes an operating element 11, a main connecting rod 12, and a latching transmission structure. The operating element 11 and the latching transmission structure are pivotally mounted. The main connecting rod 12 is hinged to both the operating element 11 and the latching transmission structure. The latching transmission structure includes a jump buckle 13 and a locking structure, both pivotally mounted and latching each other. The locking structure includes a locking buckle 14, pivotally mounted and latching with the jump buckle 13. The latching transmission structure is drively connected to either the first contact structure 21 or the second contact structure 22. Furthermore, the latching transmission structure also includes a pivotally mounted rotating plate, on which the jump buckle 13 and the locking buckle 14 are pivotally mounted. Furthermore, the operating element 11 is pivotally mounted on a first support structure, which is implemented by the switch housing h.

[0072] like Figure 1-2As shown, this is a specific connection method between the operating mechanism 1 and the contact system 2: the jump buckle 13 and the latch 14 are pivotally mounted on the first support 212 and are engaged with each other. The first support 212 acts as a rotating plate, and the two ends of the main connecting rod 12 are hinged to the operating member 11 and the jump buckle 13, respectively. The operating member 11 is driven to rotate by an external force, which drives the jump buckle 13, the latch 14, and the first support 212 to rotate around the first center 21s through the main connecting rod 12, thereby closing or opening the contact system 2. The latch structure is driven to rotate by an external force (for example, the latch structure is subjected to the force of the thermomagnetic release mechanism 5, and the cooperation relationship of the thermomagnetic release mechanism 5 and the other latch structures will be described in detail later) to release the latch structure and the latch buckle 13 (that is, the latch buckle 14 and the jump buckle 13 are engaged with each other). The working principle and operation process of the operating mechanism 1 are existing technologies in the field and will not be described in detail here. Further, as Figure 6-7 As shown in Figures 9a and 11, the first support 212 further includes a jump-hook shaft 2123 for pivotally mounting the jump-hook 13, a locking shaft for pivotally mounting the locking buckle 14, and a first support shaft 2124 for pivotally mounting the first support body 2120 of the first support 212. The locking shaft and the first support shaft 2124 are coaxially arranged, and both the jump-hook shaft 2123 and the locking shaft are located on one axial end of the first support body 2120. Specifically, the jump-hook 13 is rotatably sleeved on the jump-hook shaft 2123, and the locking buckle 14 is rotatably sleeved on the locking shaft.

[0073] like Figure 4 , 9a As shown in Figure 11, the first support 212 further includes a latch rotation limiting platform, which is disposed on one radial side of the latch shaft and coaxially arranged with the latch shaft; as Figure 4 As shown, the latch 14 includes a latch mounting hole and a latch stop boss provided on the inner side wall of the latch mounting hole. The latch 14 is sleeved on the latch shaft and the latch rotation limiting platform through the latch mounting hole. The latch rotation limiting platform cooperates with the latch stop boss and is located on both radial sides of the latch shaft to limit the rotation angle of the latch 14 relative to the first support 212.

[0074] like Figure 1-2 As shown in 4-5a, 9a, and 11, the first support 212 also includes a buckle limiting block 2128 disposed on one side of the buckle shaft 2123. The buckle limiting block 2128 cooperates with the buckle 13 to limit the range of swing of the buckle 13 relative to the first support body 2120 of the first support 212.

[0075] like Figure 9a and 11As shown, the first support 212 also includes a first support impact-bearing part 2125 disposed on the radial side of the first support body 2120. When the first support impact-bearing part 2125 is impacted (e.g., by the impact of the magnetic release transmission member 54 or the magnetic release structure), the first support 212 rotates in the breaking direction, thereby accelerating the speed at which the first support 212 rotates in the breaking direction and improving the breaking efficiency of the contact system 2.

[0076] In other embodiments, the snap fastener 13 and the latch 14 can also be pivotally mounted on the second support 222 and engage with each other. The snap fastener 13, the latch 14 and the second support 222 rotate around the second center 22s under the drive of the operating member 11 to close or open the contact system 2.

[0077] like Figure 1-2 As shown in Figure 5a, the locking structure of the operating mechanism 1 further includes a connecting rocker arm 15. The connecting rocker arm 15 and the locking buckle 14 are arranged on the same axis of rotation and rotate synchronously. The connecting rocker arm 15 and the locking buckle 14 are stacked along the axis of rotation of the locking buckle 14. The connecting rocker arm 15 is driven to rotate by the thermal release structure of the thermomagnetic release mechanism. The connecting rocker arm 15 drives the locking buckle 14 to rotate, thereby releasing its latching engagement with the jump buckle 13. The locking buckle 14 is driven to rotate by the magnetic release structure of the thermomagnetic release mechanism, thereby releasing the latching engagement between the locking buckle 14 and the jump buckle 13. Further, the thermal release structure directly drives the connecting rocker arm 15 to rotate through a pivotally mounted thermal release transmission member 55. The connecting rocker arm 15 drives the locking buckle 14 to rotate, thereby releasing its latching engagement with the jump buckle 13. The magnetic release structure directly drives the locking buckle 14 to rotate through a pivotally mounted magnetic release transmission member 54, thereby releasing its latching engagement with the jump buckle 13.

[0078] like Figure 1-2 As shown in Figure 19, the locking structure, the thermal release transmission component 55, and the magnetic release transmission component 54 are distributed at the three vertices of a triangle. Furthermore, the locking mechanism 14 and the connecting rocker arm 15 are both pivotally positioned around a first center 21s, the magnetic release transmission component 54 is pivotally positioned around a third center 54s, and the thermal release transmission component 55 is pivotally positioned around a fourth center 55s. The first center 21s, the third center 54s, and the fourth center 55s are distributed at the three vertices of a triangle.

[0079] like Figure 5a As shown, the latch 14, the first support 212 and the connecting rocker arm 15 are stacked sequentially along the rotation axis of the latch 14, with the latch 14 and the connecting rocker arm 15 located on both sides of the first support 212.

[0080] like Figure 4 , 5aAs shown, the latch 14 includes a latch body 140 and a second latch arm 142 disposed on the latch body 140, and the latch 14 is pivotally mounted via the latch body 140; the connecting rocker arm 15 includes a rocker arm mounting part 150 and a first rocker arm 151 disposed on the rocker arm mounting part 150, and the connecting rocker arm 15 is pivotally mounted via the rocker arm mounting part 150, and the second latch arm 142 and the first rocker arm 151 are driven together. Further, the second latch arm 142 includes a second latch arm connecting part 1420 and a second latch arm driven part 1421, one end of the second latch arm connecting part 1420 being connected to the latch body 140, and the other end being connected to the second latch arm driven part 1421; the first rocker arm 151 is provided with a first rocker arm mating groove 1510, and the second latch arm driven part 1421 is inserted into the first arm mating groove 1510 to achieve synchronous rotation of the latch 14 and the connecting rocker arm 15. Furthermore, the extension direction of the second arm driven part 1421 of the latch is parallel to the rotation axis direction of the latch 14.

[0081] like Figure 4 , 5a As shown, the linkage rocker arm 15 also includes a second rocker arm 152 connected to the rocker arm body 150, and the latch 14 also includes a first latch arm 141 connected to the latch body 14; when multiple operating mechanisms 1 are arranged side by side in linkage, the second rocker arm 152 and the first latch arm 141 of two adjacent operating mechanisms 1 are connected through the linkage shaft 14-15, thereby realizing the linkage release of each operating mechanism.

[0082] like Figure 13 As shown, the rocker body 150 of the linked rocker 15 includes a rocker body shaft hole 1500 disposed in the middle, and the rocker body 150 is rotatably sleeved on the first support shaft column of the housing base through the rocker body shaft hole 1500.

[0083] like Figure 2-5a As shown, the included angle between the first arm 141 and the second arm 142 of the latch is an obtuse angle, and the included angle between the first arm 151 and the second arm 152 of the rocker arm is also an obtuse angle. Furthermore, the first arm 141 and the second arm 152 of the rocker arm, and the second arm 142 and the first arm 151 of the rocker arm, are correspondingly arranged in the rotational direction of the latch 14.

[0084] like Figure 18The diagram illustrates a second implementation where the operating mechanism 1 is driven to connect with the contact system 2. In this second embodiment, compared to the first embodiment, the contact system 2 further includes a sliding slider 16, a first connecting rod 17-21, and a second connecting rod 17-22. The first connecting rod 17-21 is hinged at both ends to the slider 16 and the first contact structure 21, respectively. The second connecting rod 17-22 is hinged at both ends to the slider 16 and the second contact structure 22, respectively. The operating mechanism 1 drives the slider 16 to slide, and the slider 16 simultaneously drives the first contact structure 21 and the second contact structure 22 to rotate synchronously in opposite directions or synchronously in opposite directions via the first connecting rod 17-21 and the second connecting rod 17-22, respectively. Furthermore, the slider 16 is linearly slidable. Of course, the operating mechanism 1 may not be connected to the slider 16, but to either the first contact structure 21 or the second contact structure 22. The operating mechanism 1 drives the first contact structure 21 or the second contact structure 22 to rotate. At the same time, the first contact structure 21 or the second contact structure 22 drives the second contact structure 22 or the first contact structure 21 to rotate through the cooperation of the first connecting rod 17-21, the slider 16 and the second connecting rod 17-22, so as to realize the synchronous rotation of the first contact structure 21 and the second contact structure 22 towards each other or synchronous rotation in opposite directions. At this time, the slider 16, the first connecting rod 17-21 and the second connecting rod 17-22 become the intermediate transmission structure for realizing the linkage of the first contact structure 21 and the second contact structure 22. That is, the first contact structure 21 and the second contact structure 22 are indirectly connected through the intermediate transmission structure composed of the slider 16, the first connecting rod 17-21 and the second connecting rod 17-22.

[0085] like Figure 18 The slider 16, the first connecting rod 17-21, and the second connecting rod 17-22 are all located between the first contact structure 21 and the second contact structure 22, and the first connecting rod 17-21 and the second connecting rod 17-22 are arranged in a V-shape. One end of the first contact structure 21 and the second contact structure 22 are pivotally mounted around the first center 21s and the second center 22s, respectively, and the other end is closed or disconnected. One end of the first connecting rod 17-21 is hinged to the slider 16, and the other end is hinged to the middle of the first contact structure 21. One end of the second connecting rod 17-22 is hinged to the slider 16, and the other end is hinged to the middle of the second contact structure 22. Furthermore, the first connecting rod 17-21 and the second connecting rod 17-22 are symmetrically arranged, and the two are symmetrical structures.

[0086] like Figure 18As shown, both the first connecting rod 17-21 and the second connecting rod 17-22 are hinged to the slider 16 around the third center 17s, meaning that one end of the first connecting rod 17-21 and the second connecting rod 17-22 are coaxially rotatably mounted on the slider 16. Furthermore, the third center 17s, the first center 21s, and the second center 22s are located at the three vertices of an isosceles triangle, and the first center 21s and the second center 22s are located at the vertices corresponding to the two base angles of the isosceles triangle.

[0087] In another embodiment, the middle parts of the first contact structure 21 and the second contact structure 22 are pivotally arranged around the first center 21s and the second center 22s, respectively. One end of the first contact structure 21 is hinged to the first connecting rod 17-21, one end of the second contact structure 22 is hinged to the second connecting rod 17-22, and the other ends of the first contact structure 21 and the second contact structure 22 are closed or open.

[0088] like Figure 12 As shown, the first contact structure 21 further includes a first contact spring 213. The first contact 211 is rotatably disposed relative to the first support 212, and the first contact spring 213 is disposed between the first contact 211 and the first support 212. The first contact spring 213 applies a first force to the first contact 211. After the first contact 211 separates from the second contact 222, that is, after the first contact point 2110 of the first contact 211 and the second contact point 2210 of the second contact 221 disengage, the first force causes the first contact 211 to be limited and engaged with the first support 212 and remain relatively stationary. When the first contact 211 and the second contact 221 are closed, the first contact 211 rotates relative to the first support 212, causing the first contact spring 213 to store energy. The first force causes the first contact 211 to press the second contact 221, that is, the first contact spring 213 provides an overtravel force to the first contact 211, ensuring that the first contact 211 and the second contact 221 are reliably closed.

[0089] like Figure 12As shown, the first contact 211, the first support 212, and the first contact spring 213 are assembled in the following manner: The first support 212 includes a first support body 2120 and a first contact limiting block 2126. The first support body 2120 has a first support cavity 21200 in the middle, and a first contact insertion hole 21201 is provided on the side wall of the first support cavity 21200. One end of the first contact 211 is inserted into the first support cavity 21200 through the first contact insertion hole 21201. The first contact limiting block 2126 is disposed on the outer side wall of the first support body 2120 and located on one side of the first contact insertion hole 21201. The first contact spring 213 is disposed within the first support cavity 21200. A torsion spring has one end that is limited and engaged with the inner wall of the first support cavity 21200, and the other end that is limited and engaged with the end of the first contact 211 that is inserted into the first support cavity 21200, so that the first contact 211 abuts against the first contact limiting block 2126. The first contact 211 is rotatably set relative to the first support 212 with the first contact limiting block 2126 as support. The above assembly method is simple in structure and reliable in assembly, ensuring reliable operation of the first contact structure 21. The first contact limiting block 2126 is also used to cover the part of the first contact 211 that protrudes outside the first support 212 and is close to the first support 212, which helps to increase the electrical clearance and creepage distance after the first contact structure 21 and the second contact structure 22 are separated. Furthermore, the first support 212 also includes a first contact spring shaft 2127 disposed in the first support cavity 21200, and a first contact spring 213 is sleeved on the first contact spring shaft 2127.

[0090] In another embodiment, the first contact spring 213 can also be configured as a tension spring, with its two ends respectively hooked to one end of the first contact 211 inserted into the first support cavity 21200 and the first contact spring shaft 2127. Of course, the setting position of the first contact spring shaft 2127 needs to be adjusted accordingly.

[0091] Combination Figure 1-2 As shown in Figures 4, 6, 9a, and 11-12, the locking shaft 2123, a first support shaft 2124, and the jump-lock limiting block 2128 are disposed on one axial end of the first support body 2120, the first support cavity 21200 is disposed in the axial middle of the first support body 2120, and another first support shaft 2124 is disposed on the other axial end of the first support body 2120. Furthermore, the first support cavity 21200 is open on the side facing the connecting rocker arm 15.

[0092] like Figure 10As shown, the second contact structure 22 also includes a second contact spring (not shown in the figure). The second contact 221 is rotatably disposed relative to the second support 222, and the second contact spring is disposed between the second contact 221 and the second support 222. The second contact spring applies a second force to the second contact 221. After the second contact 221 separates from the first contact 211, that is, after the second contact point 2210 of the second contact 221 and the first contact point 2110 of the first contact 211 disengage, the second force causes the second contact 221 to be in a limiting engagement with the second support 222 and remain relatively stationary. When the second contact 221 and the first contact 211 are closed, the second contact 221 rotates relative to the second support 222, allowing the second contact spring to continue to function. The second force causes the second contact 221 to press against the first contact 211, which means that the second contact spring provides an overtravel force to the second contact 221, ensuring that the second contact 221 and the first contact 211 are reliably closed. The second contact limiting block 2224 is also used to block the part of the second contact 221 that protrudes outside the second support 222 and is close to the second support 222, which helps to increase the electrical clearance and creepage distance after the first contact structure 21 and the second contact structure 22 are separated.

[0093] Reference Figure 12 As shown, the second contact 221, the second support 222, and the second contact spring are assembled in the following manner: The second support 222 includes a second support body 2220 and a second contact limiting block 2224. The second support body 2220 has a second support cavity in the middle, and the side wall of the second support cavity has a second contact insertion hole. One end of the second contact 221 is inserted into the second support cavity through the second contact insertion hole. The second contact limiting block 2224 is disposed on the outer side wall of the second support body 2220 and located on one side of the second contact insertion hole. The second contact spring is a torsion spring disposed in the second support cavity. One end is limited and cooperated with the inner side wall of the second support cavity, and the other end is limited and cooperated with the end of the second contact 221 inserted into the second support cavity, so that the second contact abuts against the second contact limiting block 2224. The second contact 221 is rotatably disposed relative to the second support 222 with the second contact limiting block 2224 as support. Furthermore, the second support 222 also includes a second contact spring shaft disposed within the second support cavity, with the second contact spring sleeved on the second contact spring shaft.

[0094] Furthermore, such as Figure 9a and 10 As shown, the second support 222 also includes a second support shaft 222, and the two second support shafts 222 are respectively disposed at both ends of the axial direction of the second support body 2220.

[0095] In another embodiment, the second contact spring can also be configured as a tension spring, with its two ends respectively hooked to one end of the second contact 221 inserted into the second support cavity and the second contact spring shaft. Of course, the setting position of the second contact spring shaft needs to be adjusted accordingly.

[0096] like Figure 9a , 11 As shown in Figure -12, the first contact 211 includes a first contact point 2110 and a first contact arm 2111. The first contact arm 2111 has a V-shaped structure, including an outer section and an inner section. One end of the outer section is provided with the first contact point 2110, and the other end is bent and connected to one end of the inner section. The other end of the inner section is inserted into the first support 212. The outer section is bent away from the second contact 221 relative to the inner section. Furthermore, the included angle between the outer section and the inner section is an obtuse angle.

[0097] like Figure 6-7 As shown in Figures 9a-12, the first contact 211 and the second contact 212 are symmetrical structures. The structure of the second contact 212 will not be described in detail here.

[0098] like Figure 1-2 As shown in Figures 6-7, the contact system 2 further includes a separator 23, which includes a separator portion 232; as shown in Figures 6-7. Figure 2 As shown, when the first contact structure 21 and the second contact structure 22 are closed, the separator 23 is driven by the operating mechanism 1 or the contact system 2 to move the separator 232 out of the space between the first contact point 2110 of the first contact structure 21 and the second contact point 2210 of the second contact structure 22; as Figure 1 As shown, when the first contact structure 21 and the second contact structure 22 break, the separator 23 is driven to move the separator portion 232 between the first contact 2110 and the second contact 2210. The separator 23 can elongate and shield the electric arc generated between the first contact structure 21 and the second contact structure 22 during the breaking process, which is beneficial to improving the breaking performance and the current carrying capacity of the contact system 2. Furthermore, the separator 23 is movable as a whole, driven to move in a first direction or a second direction, the first direction and the second direction being opposite to each other, causing the separator portion 232 to move into or out of the first contact 2110 and the second contact 2210. It should be noted that the first contact 2110 and the second contact 2210 refer to the mutual contact area of ​​the first contact structure 21 and the second contact structure 22, which can refer to the independently set contact structures in a narrow sense, or to the parts of the first contact structure 21 and the second contact structure 22 used for mutual contact.

[0099] like Figure 1As shown, after the first contact structure 21 and the second contact structure 22 are separated, the separator 23 completely separates the first contact 211 of the first contact structure 21 (especially the part of the first contact 211 protruding outside the first support 212) and the second contact 221 of the second contact structure 22 (especially the part of the second contact structure 221 protruding outside the second support 222). That is, the first contact 211 and the second contact 221 are completely blocked by the separator 23 relative to each other in the direction perpendicular to the moving direction of the separator 23.

[0100] In other embodiments, the separator 23 can also be rotatably configured. When the first contact structure 21 and the second contact structure 22 are closed, the separator 23 is driven to swing, causing the separating portion 232 to move out between the first contact point 2110 and the second contact point 2210. When the first contact structure 21 and the second contact structure 22 are separated, the separator 23 is driven to swing, causing the separating portion 232 to move into the space between the first contact point 2110 and the second contact point 2210. It should be noted that the separator 23 in this embodiment is used to separate the symmetrically pivotally configured first contact structure 21 and second contact structure 22. In other embodiments, it can also be used to separate two asymmetrically configured first contact structures 21 and second contact structures 22 that are both movable and engaged.

[0101] like Figure 1-2 As shown in Figures 6-7, in the switching device of the present invention, the separator 23 is driven by the first contact structure 21 to move the separator 232 into or out of the first contact 2110 and the second contact 2210.

[0102] like Figure 6-7 As shown, the first support 212 includes a separator drive gear 2122, the axis of which coincides with the first center 21s; the separator 23 includes a separator rack 231 connected to the separator portion 232, the separator drive gear 2122 meshes with the separator rack 231, the first support 212 is driven to rotate by the operating mechanism 1, the first support 212 drives the separator drive gear 2122 to rotate, and the separator drive gear 2122 drives the separator 23 to move linearly through the separator rack 231, so that the separator portion 232 of the separator 23 moves into or out between the first contact point 2110 and the second contact point 2210. Furthermore, the teeth of the separator drive gear 2122 are arranged sequentially on the circumferential sidewall of the first support body 2120 along the circumferential direction of the first support body 2120 of the first support 212. That is, the first support body 2120 and the teeth of the separator drive gear 2122 arranged on the circumferential sidewall of the first support body 2120 constitute the separator drive gear 2122.

[0103] like Figures 9a-9bAs shown in Figure 11, the teeth of the separator drive gear 2122 and the teeth of the main gear 2121 are arranged side by side along the axial direction of the first support 212.

[0104] like Figure 6-7 As shown, the second support 222 includes a separator limiting platform 2223. The separator limiting platform 2223 and the separator drive gear 2122 are respectively located on both sides of the separator rack 231. The separator limiting platform 2223 and the separator rack 231 are mutually limiting and engaging, so that the separator rack 231 and the separator drive gear 2122 remain engaged. Further, the separator rack 231 includes teeth on its front side and a rack limiting side on its back side. The separator limiting platform 2223 abuts against the rack limiting side, thereby limiting and engaging the separator rack 231 and the separator drive gear 2122.

[0105] like Figure 6-7 As shown in 9a and 10, the separator limiting platform 2223 is a fan-shaped platform with its center coinciding with the second center 22s. It includes a limiting arc surface, which is in line contact with the separator rack 231, thereby ensuring the limiting effect while reducing the friction between the two.

[0106] like Figure 1-2 As shown in Figures 6 and 8, the separator 23 further includes a separator back plate 230. The separator back plate 230 is located on one side of and connected to the separator rack 231 in the width direction (the direction in which the teeth of the separator rack 231 are arranged side by side is the length direction of the separator rack 231, the extension direction of a single tooth of the separator rack 231 is the width direction of the separator 231, and the length direction and width direction are perpendicular to each other). One end of both the separator rack 231 and the separator back plate 230 in the length direction of the separator rack 231 (the direction in which the teeth of the separator rack 231 are arranged side by side is the length direction of the separator rack 231) is connected to the separator portion 232. The separator back plate 230 helps to strengthen the separator rack 231. Furthermore, the separator 23 is generally L-shaped, with the separator portion 231 as one side of the L-shaped structure, and the separator rack 231 and the separator back plate 230 as the other side of the L-shaped structure.

[0107] like Figure 6-8As shown, the partition 232 includes a partition plate 2320 and a reinforcing connecting portion 2321. The partition rack 231 and the partition back plate 230 are both connected to the reinforcing connecting portion 2321 at one end along the length of the partition rack 231. The partition back plate 230 and the partition rack 231 are located on one side of the reinforcing connecting portion 2321, and the partition plate 2320 is located on the other side. The thickness of the reinforcing connecting portion 2321 is greater than the thickness of the partition plate 2320, thereby enhancing the connection strength between the partition rack 231, the partition back plate 230, and the partition 232. Furthermore, the reinforcing connecting portion 2320 protrudes from both ends of the partition plate 2320 along its thickness direction.

[0108] like Figure 1-3 As shown in Figures 6 and 8, the separator 23 further includes a first sliding rib 233 and a second sliding rib 234 respectively disposed at both ends of the separator 232. The first sliding rib 233 and the second sliding rib 234 are respectively used to slide and engage with the fixedly disposed first guide groove h23 and second guide groove (not shown in the figure), thereby limiting the movement path of the separator 23 and ensuring reliable engagement of the separator, the first contact structure 21 and the second contact structure 23. Furthermore, the first guide groove h23 and the second guide groove are respectively disposed on the housing base and housing cover of the switch housing h.

[0109] like Figure 1-2 As shown in 4 and 5a, the switchgear of the present invention also includes a thermomagnetic tripping device. The thermomagnetic tripping device is used to drive the operating mechanism 1 to trip when an overload or short circuit fault occurs in the circuit where the switchgear is located, so that the contact system 2 disconnects the circuit where the switchgear is located.

[0110] The thermomagnetic tripping device includes a thermomagnetic tripping mechanism 5, which includes a thermal tripping structure and a magnetic tripping structure. The thermal tripping structure is used to drive the operating mechanism 1 to trip and open when an overload fault occurs in the circuit where the switchgear is located. The magnetic tripping structure is used to drive the operating mechanism 1 to trip and open when a short circuit fault occurs in the circuit where the switchgear is located. Furthermore, the thermal tripping structure includes a bimetallic strip 56, one end of which is fixedly connected to the magnetic tripping structure along its length. Along the length of the bimetallic strip 56, the magnetic tripping structure and the thermal tripping structure are arranged side-by-side. This layout helps reduce the installation space required for the thermal-magnetic tripping mechanism 5, allowing it to be installed in narrow spaces. The thermal and magnetic tripping structures are integrated modular structures, facilitating transportation, installation, and disassembly. This also improves the positioning accuracy of the components of the thermal-magnetic tripping mechanism, preventing deformation of the housing used to install it and ensuring its operational performance. Moreover, it allows the thermal and magnetic tripping structures to cooperate with the operating mechanism from different directions, simplifying structural and layout design and saving on bimetallic strip material usage. Furthermore, one end of the bimetallic strip 56 is a bimetallic strip fixing end for fixed connection with the magnetic tripping structure, and the other end is a bimetallic strip driving end for outputting the first tripping driving force outward; the magnetic tripping structure includes a magnetic tripping drive member, one end of which is a drive member driving end for outputting the second tripping driving force outward, and the other end is a drive member mounting end; in the length direction of the bimetallic strip 56, the bimetallic strip driving end, the bimetallic strip fixing end, the drive member driving end, and the drive member mounting end are arranged sequentially, which helps to reduce the installation space required for the thermomagnetic tripping mechanism 5. Specifically, as shown... Figure 4 , 5a In the direction shown in Figure 20, the bimetallic strip driving end, the bimetallic strip fixing end, the driving end of the driving component, and the mounting end of the driving component are arranged sequentially from top to bottom.

[0111] like Figure 1-2As shown in Figure 19, the thermal trip device further includes a thermal trip transmission component 55 and a magnetic trip transmission component 54, which are pivotally mounted. The magnetic trip transmission component 54, the thermal trip transmission component 55, and the locking structure of the operating mechanism 1 are distributed at the three vertices of a triangle. When an overload fault occurs in the circuit where the thermal-magnetic trip mechanism 5 is located, the thermal trip structure drives the locking structure to rotate through the thermal trip transmission component 55 to release the latching engagement with the trip latch 13, thereby disengaging the operating mechanism 1. When a short circuit fault occurs in the circuit where the thermal-magnetic trip mechanism 5 is located, the magnetic trip structure drives the locking structure to rotate through the magnetic trip transmission component 54 to release the latching engagement with the trip latch 13, thereby disengaging the operating mechanism 1. The thermal release structure is driven and cooperated with the locking structure through a thermal release transmission component, and the magnetic release structure is driven and cooperated with the locking structure through a magnetic release transmission component. This ensures the reliability and stability of the transmission path between the thermal and magnetic release mechanisms and the operating mechanism. Furthermore, both the thermal and magnetic release transmission components adopt a pivoting setting, which requires less operating and installation space, thus saving space.

[0112] like Figure 1-2 As shown in Figures 4-5b and 15-17, this is the first embodiment of the thermomagnetic tripping mechanism 5.

[0113] In the first embodiment of the thermomagnetic tripping mechanism 5, its magnetic tripping structure is a snap-action electromagnetic tripping device, which includes a current-carrying conductive plate 33 and a magnetic yoke 51 and an armature 52 used in conjunction. The current-carrying conductive plate 33 is used to connect in series with the circuit to be protected (that is, the circuit to which the switch of the present invention is connected). Specifically, in this embodiment, the current-carrying conductive plate 33 is connected in series with the contact system 2 and is also connected in series with the circuit where the switch of the present invention is located. The armature 52 serves as a magnetic tripping drive element. One end of the armature is rotatably set and this end is the armature pivot end (the armature pivot end serves as the drive element mounting end), and the other end is oscillating and this end is the armature drive end (the armature drive end serves as the drive element drive end). The armature 52 oscillates to engage or disengage with the magnetic yoke 51. The conductive plate mating section 3 of the current-carrying conductive plate 33 The conductive plate 33 passes through the middle of the yoke 51 and is located between the yoke 51 and the armature 52. The plane of the conductive plate mating section 333 is parallel to the rotation axis of the armature 52, and the direction in which the conductive plate mating section 333 is inserted between the yoke 51 and the armature 52 is perpendicular to the rotation axis of the armature 52. The extension direction of the conductive plate mating end 333 is the same as the direction in which the conductive plate mating end 333 is inserted between the yoke 51 and the armature 52. The fixed end of the bimetallic strip 56 is fixedly connected to and electrically connected to the current-carrying conductive plate 33. When an overload or short-circuit fault occurs in the circuit where the switch is located, an overload or short-circuit current flows through the current-carrying conductive plate 33, causing the bimetallic strip 56 to bend due to heat or causing the yoke 51 to attract the armature 52, thereby driving the operating mechanism 1 to trip and open the circuit. In the thermomagnetic tripping mechanism 5, the fixed end of the bimetallic strip is fixedly connected to the current-carrying conductive plate 33, and the armature 52 is rotatably mounted on the magnetic yoke 51. The magnetic yoke 51 is fixedly connected to the current-carrying conductive plate 33, making the thermomagnetic tripping mechanism 5 an integral structure, and making the thermomagnetic tripping mechanism 5 a whole module, which is convenient for assembly and disassembly.

[0114] like Figure 1-2 As shown, the current-carrying conductive plate 33 also serves as a conductive plate for connecting the series contact system 2 and the incoming terminal 31.

[0115] Compared with the traditional method of placing the bimetallic component between the magnetic yoke and the armature of the magnetic tripping structure, the above-described layout of the thermal tripping structure and the magnetic tripping structure is advantageous for reducing the size of the magnetic yoke 51 and reducing the overall thickness of the thermal magnetic tripping mechanism 5 (that is, the thickness from the armature 52 to the magnetic yoke 51).

[0116] like Figure 1-2As shown in Figures 4-5b and 15, the magnetic release structure further includes an armature spring 53, which is connected to the armature 52 and applies a force to the armature 52, causing the armature 52 to have a rotational tendency to separate from the magnetic yoke 51. When the armature 52 is attracted by the magnetic yoke 51, it needs to overcome the force applied to the armature 52 by the armature spring 53. Furthermore, the current-carrying conductive plate 33 also includes a second intermediate section 332 of the conductive plate. One end of the second intermediate section 332 is bent and connected to the end of the conductive plate mating section 333 away from the bimetallic component. One end of the armature spring 53 is connected to the armature driving end of the armature 52, and the other end is connected to the second intermediate section 332 of the conductive plate.

[0117] like Figure 5a , 15 As shown, the thermal release structure also includes a bimetallic bracket 58, which includes a vertical bracket portion 580 and a horizontal bracket portion 581. One end of the vertical bracket portion 580 is connected to the bimetallic strip 56, and the other end is bent and connected to the horizontal bracket portion 581. The current-carrying conductive plate 33 also includes a third intermediate section 334 of the conductive plate that is bent and connected to the conductive plate mating section 333. The third intermediate section 334 of the conductive plate is located between the magnetic release structure and the bimetallic bracket 58. The horizontal bracket portion 581 is stacked parallel to and fixedly connected to the third intermediate section 334 of the conductive plate, that is, the bimetallic strip 56 is fixedly connected to the magnetic release structure through the bimetallic bracket 58. Furthermore, the bimetallic bracket 58 is an L-shaped structure, with the vertical bracket portion 580 and the horizontal bracket portion 581 serving as two sides of the L-shaped structure.

[0118] like Figure 5a , 15 As shown, the current-carrying conductive plate 33 further includes a conductive plate bimetallic adjustment section 335 opposite to the vertical part 580 of the bracket. The conductive plate bimetallic adjustment section 335 is bent and connected to the third intermediate section 334 of the conductive plate. The conductive plate bimetallic adjustment section 335 and the conductive plate mating section 333 are bent to both sides of the third intermediate section 334 of the conductive plate. The conductive plate bimetallic adjustment section 335 is provided with an adjustment section screw hole. The thermal release structure also includes a bimetallic adjustment screw 57. The bimetallic adjustment screw 57 is threadedly engaged with the adjustment section screw hole. One end of the bimetallic adjustment screw 57 is used to press against the vertical part 58 of the bracket and to adjust the bimetallic strip 56. Further, the conductive plate mating section 333, the third intermediate section 334 of the conductive plate, and the conductive plate bimetallic adjustment section 335 are connected by being bent at right angles in sequence.

[0119] like Figure 1-2 As shown in 5a, the bimetallic strip 56 directly drives the linkage rocker arm 15 of the operating mechanism 1 to rotate through the thermal release transmission component 55. The linkage rocker arm 15 drives the lock 14 to rotate, thereby releasing the latching engagement between it and the jump buckle 13.

[0120] In another embodiment, the thermal release drive 55 directly drives the latch 14 to rotate, thereby releasing the latch 14 from the snap-fit ​​engagement with the snap-fit ​​buckle 13. Furthermore, the thermal release drive drive arm 552 of the thermal release drive 55 directly drives the second latch arm 142 of the latch 14.

[0121] like Figure 1-2 As shown in Figure 5a, the thermal trip transmission component 55 includes a thermal trip transmission component mounting part 550, a thermal trip transmission component driven arm 551, and a thermal trip transmission component driving arm 552. The thermal trip transmission component 55 is pivotally mounted through the thermal trip transmission component mounting part 550. One end of the thermal trip transmission component driven arm 551 is connected to the thermal trip transmission component mounting part 550, and the other end is driven to cooperate with the bimetallic strip 56. One end of the thermal trip transmission component driving arm 552 is connected to the thermal trip transmission component mounting part 550, and the other end is driven to cooperate with the operating mechanism 1 to drive the locking buckle 14 of the operating mechanism 1 to rotate and release its latching cooperation with the jump buckle 13. The thermal trip transmission component driven arm 551 and the thermal trip transmission component driving arm 552 are distributed along the axial direction of the thermal trip transmission component mounting part 550. Furthermore, the free end of the drive arm 552 of the thermal release transmission component is driven to engage with the linkage rocker arm 15 of the operating mechanism 1 to drive the linkage rocker arm 15 to rotate. The linkage rocker arm 15 drives the latch 14 to rotate, thereby releasing its latching engagement with the jump buckle 13. Furthermore, the included angle between the driven arm 551 and the drive arm 552 of the thermal release transmission component is ≤90°.

[0122] like Figure 14 As shown, the thermal trip transmission component mounting part 550 includes a thermal trip transmission component mounting hole 5500 located in its middle, and a thermal trip lever shaft h55 is provided on the housing base. The thermal trip transmission component mounting part 550 is rotatably sleeved on the thermal trip lever shaft h55 through the thermal trip transmission component mounting hole 5500.

[0123] like Figure 14 As shown, the thermal trip transmission member driven arm 551 includes a transmission member driven arm connecting part 5510 and a transmission member driven arm driven part 5511. One end of the transmission member driven arm connecting part 5510 is connected to the thermal trip transmission member mounting part 550, and the other end is connected to the transmission member driven arm driven part 5511. The extension direction of the transmission member driven arm driven part 5511 is parallel to the rotation axis direction of the thermal trip transmission member 55 and perpendicular to the extension direction of the bimetallic strip 56 of the thermomagnetic trip mechanism 5.

[0124] like Figure 1-2As shown in Figures 4-5b and 15-16, the magnetic yoke 51 includes a magnetic yoke body 510 and magnetic yoke support arms 511 and magnetic yoke limiting arms 512 respectively disposed at both ends of the magnetic yoke body 510. The two ends of the armature 52 are an armature pivot end and an armature drive end, respectively. The armature pivot end is rotatably supported on the magnetic yoke support arm 511 and is limited by the magnetic yoke support arm 511 to restrict the movement of the armature 52 along its rotation axis. The armature drive end is limited by the magnetic yoke limiting arm 512 to restrict the movement of the armature 52 along its rotation axis. The assembly method of the magnetic yoke 51 and the armature 52 is simple and reliable. The magnetic yoke 51 supports the rotation of the armature 52 while reliably limiting the armature 52, ensuring that the armature 52 rotates reliably and stably in the predetermined position, thereby reliably realizing the short-circuit protection function.

[0125] like Figure 1-2 As shown in Figures 4-5b and 15-16, the magnetic yoke body 510 has a U-shaped structure, including a magnetic yoke body base plate 5100 and magnetic yoke body side plates 5101. The two ends of the magnetic yoke body base plate 5100 are respectively spaced apart from the two magnetic yoke body side plates 5101. The conductive plate mating section 333 passes between the two magnetic yoke body side plates 5101 and is fixedly connected to the magnetic yoke body base plate 5101. The magnetic yoke body side plates 5101 face the armature 52. The edge of the yoke body side plate 5101 is attracted to or separated from the armature 52. Each of the yoke body side plates 5101 is provided with a yoke support arm 511 and a yoke limiting arm 512. The yoke support arms 511 on the two yoke body side plates 5101 are arranged relatively spaced apart, and the yoke limiting arms 512 on the two yoke body side plates 5101 are arranged relatively spaced apart. The armature driving end is rotatably supported on the two yoke limiting arms 512, and the armature driving end swings between the two yoke limiting arms 512. Furthermore, the two ends of the edge of the yoke body side plate 5101 facing the armature 52 are respectively provided with a yoke support arm 511 and a yoke limiting arm 512.

[0126] In other embodiments, the magnetic yoke body 510 may also include more than two magnetic yoke body side plates 5101, with each magnetic yoke body side plate 5101 arranged side by side at intervals. Of course, the structure of the conductive plate mating section 333 must also be adjusted accordingly, for example, by providing an opening for the magnetic yoke body side plate 5101 located in the middle to pass through. Each of the magnetic yoke body side plates 5101 may be provided with a magnetic yoke support arm 511 and a magnetic yoke limiting arm 512, or the magnetic yoke support arm 511 and the magnetic yoke limiting arm 512 may only be provided on the two outermost magnetic yoke body side plates 5101.

[0127] like Figure 1-2As shown in Figures 4-5b and 15-16, the magnetic yoke support arm 511 is provided with a magnetic yoke support groove 5110. The armature 52 also includes two armature base feet 522 that are relatively spaced apart on the pivot end of the armature. Support shoulders are formed on both sides of the two armature base feet 522, which are two stepped structures formed on both sides of the two armature bases 522. The two support shoulders are respectively rotatably disposed in the two magnetic yoke support grooves 5110. The two armature base feet 522 are located between the two magnetic yoke support arms 511 and are respectively limited to cooperate with the two magnetic yoke support arms 511, restricting the movement of the armature 52 along its axial direction. Furthermore, the edge of the magnetic yoke main body side plate 5101 facing the armature 52 forms a side wall of the magnetic yoke support groove 5110, so that when the magnetic yoke 51 and the armature 52 are attracted, the armature 52 is tightly attached to the magnetic yoke main body side plate 5101.

[0128] like Figures 5a-5b As shown in Figure 16, the free ends of the magnetic yoke limiting arms 512 are each provided with magnetic yoke stops. Two magnetic yoke stops protrude between the two magnetic yoke limiting arms 512, and these stops engage with the armature driving end to prevent the armature driving end from swinging out of the space between the two magnetic yoke limiting arms 512, thus ensuring that the armature 52 swings relative to the magnetic yoke 52 within a predetermined swing angle range. Further, the armature driving end includes an armature limiting plate 5210 and an armature driving finger 5211. The armature limiting plate 5210 is located between the two magnetic yoke limiting arms 512 and engages with the two magnetic yoke stops. The armature driving finger 5211 is used for driving the operating mechanism 1.

[0129] like Figure 1-2 As shown in 4-5b and 15-16, the armature 52 also includes an armature main board 520. The armature main board 520 is located between the armature support arm 511 and the armature limiting arm 512 and cooperates with the magnetic yoke body side plate 5101. One end of the armature main board 520 is connected to the armature base 522, and the other end is connected to the armature limiting plate 5210.

[0130] like Figure 1-2 As shown in Figure 4, the armature 52 directly drives the latch 14 to rotate through the magnetic release transmission component 54, so that the latch 14 releases the latching engagement with the jump buckle 13, and the operating mechanism 1 is disengaged.

[0131] like Figure 1-2 As shown in Figures 5a and 5a, the rotation center lines of the magnetic release drive 54, the thermal release drive 55, and the armature 52 are arranged in parallel.

[0132] like Figure 1-2As shown in Figures 15 and 17, the current-carrying conductive plate 33 further includes a conductive plate support arm 336, which is bent and connected to the conductive plate bimetallic adjustment section 335. The magnetic release transmission component 54 is pivotally mounted on the conductive plate support arm 336. Furthermore, the plane of the conductive plate support arm 336 is perpendicular to the plane of the conductive plate bimetallic adjustment section 335. Furthermore, the rotation axis of the magnetic release transmission component 54 is parallel to the rotation axis of the armature 52.

[0133] like Figure 1-2 As shown in Figure 4, the magnetic release transmission component 54 includes a first magnetic release transmission component 541 and a second magnetic release transmission component 542. One end of the first magnetic release transmission component 541 is connected to the armature 52 for transmission, and the other end is bent and connected to the second magnetic release transmission component 542. The other end of the second magnetic release transmission component 542 is connected to the first locking arm 141 of the latch 14 for transmission. The magnetic release transmission component 54 is pivotally set at the connection between the first magnetic release transmission component 541 and the second magnetic release transmission component 542. Furthermore, the magnetic trip transmission component 54 also includes a magnetic trip transmission component reinforcing rib 543. The two ends of the reinforcing rib 543 are connected to the first arm 541 and the second arm 542 of the magnetic trip transmission component, respectively. The reinforcing rib 543 improves the structural strength of the magnetic trip transmission component 54, enabling it to withstand the impact of the armature 52. The included angle between the first arm 541 and the second arm 542 of the magnetic trip transmission component is ≤90°. Furthermore, the reinforcing rib 543 is an arc-shaped rib, and its center coincides with the rotation center of the magnetic trip transmission component 54.

[0134] The thermal-magnetic tripping mechanism of the present invention also achieves the following technical effects: the thermal tripping structure and the magnetic tripping structure are driven and cooperated with the linkage rocker arm 15 and the latch 14 through the thermal tripping transmission component 55 and the magnetic tripping transmission component 54 respectively, which increases the distance between the transmission paths of the two, avoids interference between the two, and facilitates layout and structural design.

[0135] like Figures 19-20 The image shows a second embodiment of the thermomagnetic tripping mechanism 5:

[0136] In the second embodiment of the thermomagnetic tripping mechanism 5, its magnetic tripping structure is a direct-acting electromagnetic tripping device, which includes a coil winding 590, a coil frame 591, a magnetic yoke 592, a push rod 593, a fixed iron core, and a moving iron core. The coil winding 590 is sleeved on the coil frame 591. The magnetic yoke 592 is connected to the coil frame 590 and arranged around the coil winding 590. The push rod 593 serves as a magnetic tripping drive, and the axial direction of the push rod 593 is the same as the length direction of the bimetallic strip 56. One end of the push rod 593 protrudes outside the coil frame 590 as the drive end of the drive, and the other end is slidably inserted in the middle of the coil frame 590 as the installation end of the drive. The fixed iron core and the moving iron core are respectively arranged in the middle of the coil frame 590. The push rod 593 is fixedly connected to the moving iron core. The bimetallic strip installation end of the bimetallic strip 56 is fixedly connected to the magnetic yoke 592, and the bimetallic strip 56 is electrically connected to the coil winding 590. Furthermore, the moving direction of the push rod 593 is perpendicular to the rotation direction of the magnetic release transmission component 54 and the same as the axial direction of the push rod 593.

[0137] One end of the coil winding 590 is electrically connected to the incoming conductive plate 36, and the other end is electrically connected to the bimetallic bracket 58; the incoming conductive plate 36 also cooperates with the incoming terminal 31.

[0138] The magnetic yoke 592 has a U-shaped structure, comprising a base plate and side plates. The two side plates are bent and connected to both ends of the base plate and fixedly connected to both ends of the coil frame 591. Furthermore, the base plate and the two terminals of the coil winding 590 are located on the radial sides of the coil frame 590. Further, the two terminals of the coil winding 590 extend axially towards both ends of the coil frame 590.

[0139] The bimetallic bracket 58 is fixedly connected to the magnetic yoke 592. One end of the bimetallic strip 56 is fixedly and electrically connected to the bimetallic bracket 58, and the other end is in transmission engagement with the thermal release transmission component 55. Further, the bimetallic bracket 58 has an overall L-shaped structure, including a horizontal bracket portion 580 and a vertical bracket portion 581. One end of the horizontal bracket portion 580 is fixedly connected to one end of the magnetic yoke 592, and the other end is bent and connected to one end of the vertical bracket portion 581. The other end of the vertical bracket portion 581 is fixedly and electrically connected to one end of the bimetallic strip 56. Further, the horizontal bracket portion 580 is fixedly connected to the magnetic yoke side plate of the magnetic yoke 592 near the thermal release structure.

[0140] To be applicable to the above-mentioned direct-acting electromagnetic trip unit, such as Figures 19-20As shown, the magnetic release transmission component 54 needs to be improved as follows: The magnetic release transmission component 54 includes a first magnetic release transmission component 541 and a second magnetic release transmission component 542. One end of the first magnetic release transmission component 541 is connected to the top rod 593 of the magnetic release structure, and the other end is bent and connected to one end of the second magnetic release transmission component 542. The other end of the second magnetic release transmission component 542 is connected to the latch 14 of the operating mechanism 1 to drive the latch 14 to rotate and release it from the latching engagement with the jump buckle 13. Furthermore, the first magnetic release transmission component 541 and the second magnetic release transmission component 542 are generally V-shaped.

[0141] Furthermore, the included angle between the first arm 541 and the second arm 542 of the magnetic release transmission component is an obtuse angle.

[0142] Furthermore, the magnetic tripping transmission component 54 also includes a magnetic tripping transmission component mounting portion 540, through which the magnetic tripping transmission component 54 is pivotally mounted. Furthermore, the magnetic tripping transmission component mounting portion 542 is disposed on the end of the first arm 541 of the magnetic tripping transmission component that is connected to the second arm 542 of the magnetic tripping transmission component.

[0143] Furthermore, the magnetic release transmission component 54 is a one-piece structure, preferably formed by cutting and bending a metal plate.

[0144] like Figure 4 and 9a As shown, the cooperation process between the first support bearing part 2125 of the first support 212 and the magnetic release transmission member 54 is as follows: When the magnetic release structure is activated, the latch 14 is first driven to rotate to release its latching engagement with the jump buckle 13. Then, the first support 212 is driven to rotate through the first support bearing part 2125, causing the first support 212 to rotate in the breaking direction. Further, when the magnetic release structure is activated, the armature 52 drives the magnetic release transmission member 541 to rotate through the first arm 541 of the magnetic release transmission member. The magnetic release transmission member 54 strikes the second arm 142 of the latch 14 through the second arm 542 of the magnetic release transmission member, causing the latch 14 to rotate and release its latching engagement with the jump buckle 13. Then, the second arm 542 of the magnetic release transmission member strikes the first support bearing part 2125, causing the first support 212 to rotate in the breaking direction, thereby accelerating the breaking speed of the contact system 2.

[0145] In another embodiment, the latch 14 is rotated by the magnetic release transmission member 54, the latch 14 is released from the latching engagement with the snap buckle 13, and the latch 14 rotates further and strikes the first support bearing part 2125 of the first support 212, causing it to rotate in the breaking direction.

[0146] like Figure 15 and 17As shown, the current-carrying conductive plate 33 further includes a first intermediate section 331 and a connecting section 330. The connecting section 330, the first intermediate section 331, the second intermediate section 332, the mating section 333, the third intermediate section 34, and the dual-metal adjustment section 335 are connected end-to-end in sequence. The first intermediate section 331, the second intermediate section 332, the mating section 333, and the third intermediate section 334 form a rectangular frame structure. The connecting section 330 is bent away from the mating section 333 relative to the first intermediate section 331, and the dual-metal adjustment section 335 is bent away from the second intermediate section 332 relative to the third intermediate section 334. Furthermore, the conductive plate support arm 336 is bent and connected to the dual-metal adjustment section 335 and is located on the same side as the second intermediate section 334.

[0147] like Figure 1-2 As shown in Figure 19, the switchgear also includes a lead-out conductive plate 34, which is used to connect the lead-out terminal 32 and the contact system 2 in series.

[0148] like Figure 1-2 As shown in Figure 19, the switching device also includes an arc-inducing plate 35, one end of which is electrically connected to the outgoing conductive plate 34, and the other end extends toward the arc-extinguishing chamber 4.

[0149] like Figure 1-2 As shown in Figure 19, the switching device of the present invention is a circuit breaker, which adopts the following layout:

[0150] The operating mechanism 1, contact system 2, incoming terminal 31, outgoing terminal 32, and arc-extinguishing chamber 4 are all disposed inside the circuit breaker housing (i.e., switch housing h). The operating element 11, contact system 2, and arc-extinguishing chamber 4 of the operating mechanism 1 are arranged sequentially in the height direction of the circuit breaker. The incoming terminal 31 and outgoing terminal 32 are located at both ends of the circuit breaker in the length direction. The contact system 2 and arc-extinguishing chamber 4 are located between the incoming terminal 31 and the outgoing terminal 32 in the length direction of the circuit breaker. The first contact structure 21 and the second contact structure 22 of the contact system 2 are symmetrically and synchronously rotated in the length direction of the circuit breaker. The arc inlet of the arc-extinguishing chamber 4 is matched with the breaking interval formed by the first contact structure 21 and the second contact structure 22 and faces the operating element 11. The aforementioned layout of the circuit breaker is reasonable and compact, providing more assembly space for the arc-extinguishing chamber 4 and allowing for the installation of larger-sized arc-extinguishing chambers 4, thereby improving the arc-extinguishing and breaking performance of the circuit breaker. Furthermore, the symmetrical and synchronous rotation of the first contact structure 21 and the second contact structure 22 not only doubles the breaking speed of the contact system 2 but also doubles the opening distance, which is beneficial for improving short-circuit breaking performance and current-carrying capacity. Specifically, as... Figure 1-2 As shown in Figure 19, Figure 1-2 The left and right directions of terminal 19 (that is, the direction from incoming terminal 31 to outgoing terminal 32) are the length directions of the circuit breaker. Figure 1-2 The vertical direction (that is, the direction from the operating element 11 to the arc-extinguishing chamber 4) is the height direction of the circuit breaker. Figure 1-2 The direction inside and outside the paper is the thickness direction of the circuit breaker.

[0151] like Figure 1-2 As shown in Figures 1 and 19, the rotation centers of the operating element 11, the first contact structure 21, and the second contact structure 22 are located at the three vertices of a triangle.

[0152] Furthermore, such as Figure 1-2 As shown in Figures 1 and 19, the above triangle is an acute triangle.

[0153] like Figure 1-2 As shown in Figures 1 and 19, the incoming terminal 31, the first contact structure 21, the second contact structure 22, and the outgoing terminal 32 are arranged side by side in sequence along the length of the circuit breaker.

[0154] like Figure 1-2 As shown in Figure 19, the latch 14 of the operating mechanism 1, the first support 212 of the contact system 2, and the connecting rocker arm 15 of the operating mechanism 1 are stacked sequentially in the thickness direction of the circuit breaker. That is, the latch 14 and the connecting rocker arm 15 are located on both sides of the first support 212 in the thickness direction of the circuit breaker. The latch 14 and the connecting rocker arm 15 cooperate to provide more selection space for the cooperation points of the operating mechanism 1 and the thermomagnetic tripping mechanism 5, which facilitates the layout and structural design.

[0155] like Figure 1-2 As shown in Figure 19, along the length of the circuit breaker, the contact system 2 and the arc-extinguishing chamber 4 are located on one side of the thermomagnetic tripping mechanism 5, and the incoming terminal 31 is located on the other side of the thermomagnetic tripping mechanism 5.

[0156] like Figure 1-2 As shown in Figure 19, the thermal tripping structure and the magnetic tripping structure of the thermal-magnetic tripping mechanism 5 are arranged side by side in the height direction of the circuit breaker. Furthermore, in the length direction of the circuit breaker, the thermal tripping structure is arranged side by side with the contact system 2, and the magnetic tripping structure is arranged side by side with the arc-extinguishing chamber 4.

[0157] In another embodiment, along the length of the circuit breaker, the contact system 2 and the arc-extinguishing chamber 4 are located on one side of the thermomagnetic tripping mechanism 5, and the outgoing terminal 32 is located on the other side of the thermomagnetic tripping mechanism 5.

[0158] In another embodiment, the thermomagnetic tripping mechanism 5 is located between the contact system 2 and the incoming terminal 31 or between the contact system 2 and the outgoing terminal 32 along the length of the circuit breaker.

[0159] In another embodiment, the thermomagnetic tripping mechanism 5 is located between the arc-extinguishing chamber 4 and the incoming terminal 31 or between the arc-extinguishing chamber 4 and the outgoing terminal 32 along the length of the circuit breaker.

[0160] In other embodiments, the thermal tripping structure and magnetic tripping structure of the thermal-magnetic tripping mechanism 5 are located on both sides of the contact system 2 or on both sides of the arc-extinguishing chamber 4 along the length of the circuit breaker.

[0161] like Figure 1-2 As shown in Figure 19, the thermal tripping transmission component 55 of the thermomagnetic tripping mechanism 5 is located between the operating mechanism 1 and the bimetallic assembly. Furthermore, the thermal tripping transmission component 55 is located along the length of the circuit breaker between the connecting rocker arm 15 of the operating mechanism 1 and the bimetallic strip 56 of the bimetallic assembly.

[0162] like Figure 1-2 As shown, the magnetic tripping structure is a snap-action electromagnetic trip unit, and the magnetic tripping transmission component 54 of the thermomagnetic tripping mechanism 5 is located between the operating mechanism 1 and the armature 52. Furthermore, the magnetic tripping transmission component 54 is located between the latch 14 of the operating mechanism 1 and the armature 52 in the length direction of the circuit breaker. Furthermore, the magnetic tripping transmission component 54 is located below the thermomagnetic tripping transmission component 55 in the height direction of the circuit breaker.

[0163] In another embodiment, the magnetic tripping structure is a direct-acting electromagnetic tripping device, with the magnetic tripping transmission component 54 located between the operating mechanism 1 and the top rod 593 of the direct-acting electromagnetic tripping device.

[0164] like Figure 1-2 As shown in Figures 1 and 19, the rotation centers of the latch 14, the magnetic release transmission component 54, and the thermal release transmission component 55 are located at the three vertices of a triangle.

[0165] Furthermore, such as Figure 1-2 As shown, when the magnetic tripping structure is a snap-action electromagnetic tripping device, the aforementioned triangle is an acute triangle.

[0166] Furthermore, such as Figure 19 As shown, when the magnetic tripping structure is a direct-acting electromagnetic tripping device, the above triangle is an obtuse triangle, and the vertex angle corresponding to the latch 14 is an obtuse angle.

[0167] like Figure 1-2 As shown in Figure 19, the separator 23 of the contact system 2 is located between the first contact structure 21 and the second contact structure 22 in the length direction of the circuit breaker.

[0168] like Figure 1-2As shown in Figure 19, the arc-extinguishing chamber 40 includes multiple arc-extinguishing grid plates 40, which are arranged side by side at intervals along the length of the circuit breaker.

[0169] like Figure 1-2 As shown in Figure 19, the arc-inducing plate 35 and the magnetic yoke 51 / 592 of the magnetic release structure (as shown in Figure 19) Figure 1-2 As shown, the magnetic tripping structure is a snap-action electromagnetic tripping device, which includes a magnetic yoke 51; as Figure 19 As shown, the magnetic tripping structure is a direct-acting electromagnetic tripping device, which includes a magnetic yoke 592) located on both sides of the arc-extinguishing chamber 4 along the length of the circuit breaker. This is beneficial for increasing the speed at which the arc enters the arc-extinguishing chamber 4 and improving the arc-extinguishing efficiency. Moreover, the magnetic yoke 51 / 592 serves as an arc-initiating structure on one side of the arc-extinguishing chamber 40, which helps to simplify the internal structure of the circuit breaker and reduce the number of parts.

[0170] like Figure 1-2 As shown in Figure 19, the circuit breaker is a miniature circuit breaker with a U-shaped housing. The operating element 11 of the operating mechanism 1 is located on the upper part of the U-shaped structure, and the arc-extinguishing chamber 4 is located on the lower part of the U-shaped structure. The arc-extinguishing chamber 4 has a larger installation space, which allows the circuit breaker to use a larger arc-extinguishing chamber 4 to improve the arc-extinguishing capability. The incoming terminal 31 and the outgoing terminal 32 are located at both ends of the lower part of the U-shaped structure, and the contact system 2 is located at the junction of the upper and lower parts of the U-shaped structure. Furthermore, the thermal tripping transmission component 55 of the thermomagnetic tripping mechanism 5 is located at the upper part of the U-shaped structure, and the thermal tripping structure of the thermomagnetic tripping mechanism 5 extends from the lower part to the upper part of the U-shaped structure. The operating component 11, the thermal tripping transmission component 55, and the upper end of the thermal tripping structure are arranged side by side in sequence along the length of the circuit breaker. The magnetic tripping transmission component 54 and the magnetic tripping structure are located at the lower part of the U-shaped structure. The magnetic tripping transmission component 54 is located between the contact system 2 and the incoming terminal 31 along the length of the circuit breaker, and the magnetic tripping structure is located between the arc-extinguishing chamber 4 and the incoming terminal 31 along the length of the circuit breaker. Furthermore, the upper and lower parts of the U-shaped structure refer to the upper square space and the lower square space of the U-shaped structure.

[0171] The present invention also discloses a circuit breaker device comprising two or more circuit breakers used side by side, wherein the locking structures of adjacent circuit breakers are tractively connected and linked. Further, in adjacent circuit breakers, the locking latch 14 of one locking structure is tractively connected and linked to the rocker arm 15 of the other locking structure; for example, the first locking arm 141 of the locking latch 14 is tractively connected to the second rocker arm 152 of the corresponding rocker arm 15 via a linkage shaft 14-15.

[0172] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "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 conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0173] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker comprising a circuit breaker housing and an operating mechanism (1), a contact system (2), an incoming line terminal (31), an outgoing line terminal (32), an arc chamber (4) and a thermal-magnetic release mechanism (5) arranged within the circuit breaker housing; characterized in that: The contact system (2) includes a first contact structure (21) and a second contact structure (22) that are synchronously rotated. In the height direction of the circuit breaker, the operating element (11), the contact system (2), and the arc-extinguishing chamber (4) of the operating mechanism (1) are arranged in sequence; Along the length of the circuit breaker, the incoming terminal (31) and the outgoing terminal (32) are located at both ends of the circuit breaker, the contact system (2) and the arc-extinguishing chamber (4) are located between the incoming terminal (31) and the outgoing terminal (32), the contact system (2) and the arc-extinguishing chamber (4) are located on one side of the thermomagnetic tripping mechanism (5), and the incoming terminal (31) or the outgoing terminal (32) is located on the other side of the thermomagnetic tripping mechanism (5). The first contact structure (21) and the second contact structure (22) are arranged side by side. The thermomagnetic tripping mechanism (5) includes a thermal tripping structure for driving the operating mechanism (1) to trip when an overload fault occurs in the circuit where the circuit breaker is located, and a magnetic tripping structure for driving the operating mechanism (1) to trip when a short circuit fault occurs in the circuit where the circuit breaker is located. The thermal tripping structure and the magnetic tripping structure are arranged side by side in the height direction of the circuit breaker. The thermal tripping structure includes a bimetallic strip (56); along the length of the bimetallic strip (56), the magnetic tripping structure and the thermal tripping structure are arranged side by side; One end of the bimetallic strip (56) along its length is fixedly connected to the magnetic tripping structure; one end of the bimetallic strip (56) is a fixed end for being fixedly connected to the magnetic tripping structure and the other end is a driving end for outputting the first tripping driving force; the magnetic tripping structure includes a magnetic tripping drive, one end of which is a driving end for outputting the second tripping driving force and the other end is a driving end for mounting; along the length of the bimetallic strip (56), the bimetallic strip driving end, the bimetallic strip fixed end, the driving end, and the driving end are arranged in sequence.

2. The circuit breaker of claim 1, wherein: The incoming terminal (31), the first contact structure (21), the second contact structure (22) and the outgoing terminal (32) are arranged side by side in the length direction of the circuit breaker; the arc inlet of the arc extinguishing chamber (4) is matched with the breaking interval formed by the first contact structure (21) and the second contact structure (22) and faces the operating member (11).

3. The circuit breaker of claim 1, wherein: The operating mechanism (1) further includes a main connecting rod (12), a trip buckle (13) and a latch (14). The first contact structure (21) includes a first support (212) and a first contact (211). The first support (212) is pivotally mounted inside the circuit breaker housing. The first contact (211) is mounted on the first support (212) and rotates synchronously with the first support (212) under its drive. The trip buckle (13) and the latch (14) are pivotally mounted on the first support (212) and are fastened together. The two ends of the main connecting rod (12) are hinged to the operating member (11) and the trip buckle (13) respectively.

4. The circuit breaker of claim 3, wherein: The operating mechanism (1) also includes a linkage rocker arm (15), which is set to rotate synchronously with the latch (14) on the same axis. In the thickness direction of the circuit breaker, the linkage rocker arm (15) and the latch (14) are located on both sides of the first support (212). The thermomagnetic tripping mechanism (5) includes a thermal tripping structure and a magnetic tripping structure. The thermal tripping structure is used to drive the latch (14) to rotate through the linkage rocker arm (15) to release its latching engagement with the trip latch (13) when an overload fault occurs in the circuit where the circuit breaker is located. The magnetic tripping structure is used to directly drive the latch (14) to rotate to release its latching engagement with the trip latch (13) when a short circuit fault occurs in the circuit where the circuit breaker is located. When multiple circuit breakers are set up in parallel, in two adjacent circuit breakers, the latch (14) of one circuit breaker is driven to connect with the linkage rocker arm (15) of the other circuit breaker.

5. The circuit breaker of claim 1, wherein: Along the length of the circuit breaker, the thermal trip structure is located between the contact system (2) and the incoming terminal (31) or between the contact system (2) and the outgoing terminal (32), and the magnetic trip structure is located between the arc-extinguishing chamber (4) and the incoming terminal (31) or between the arc-extinguishing chamber (4) and the outgoing terminal (32).

6. The circuit breaker of claim 5, wherein: The circuit breaker also includes an arc-starting plate (35) electrically connected to the outgoing terminal (32) and located between the outgoing terminal (32) and the arc-extinguishing chamber (40) in the longitudinal direction of the circuit breaker.

7. The circuit breaker of claim 1, wherein: The thermomagnetic tripping mechanism (5) further includes a pivotally mounted thermal tripping transmission component (55), and the thermal tripping structure includes a dual-metal assembly. The thermal tripping transmission component (55) is located between the operating mechanism (1) and the dual-metal assembly.

8. The circuit breaker according to claim 7, characterized in that: The thermomagnetic tripping mechanism (5) further includes a pivotally mounted magnetic tripping transmission component (54). The magnetic tripping structure is a snap-action electromagnetic tripping device, which includes a pivotally mounted armature (52). The magnetic tripping transmission component (54) is located between the operating mechanism (1) and the armature (52). The operating mechanism (1) includes an operating component (11), a main connecting rod (12), and a snap-action transmission structure. The operating component (11) and the snap-action transmission structure are pivotally mounted respectively. The main connecting rod (12) is respectively connected to the operating component (11) and the main connecting rod (52). 11) Hinged to the latch transmission structure, the latch transmission structure includes a jump buckle (13) and a locking structure that are pivotally set and latched together respectively. The locking structure includes a locking buckle (14) that is pivotally set and latched together with the jump buckle (13). The latch transmission structure is connected to the first contact structure (21) or the second contact structure (22) in a transmission. The rotation centers of the locking buckle (14), the magnetic release transmission component (54) and the thermal release transmission component (55) are located at the three vertices of a triangle respectively.

9. The circuit breaker according to claim 1, characterized in that: The thermomagnetic tripping mechanism (5) also includes a pivotally mounted magnetic tripping transmission component (54). The magnetic tripping structure is a direct-acting electromagnetic tripping device. The magnetic tripping transmission component (54) is located between the operating mechanism (1) and the magnetic tripping structure. One end of the magnetic tripping transmission component (54) is driven by the operating mechanism (1), and the other end is driven by the top rod of the direct-acting electromagnetic tripping device.

10. The circuit breaker according to claim 1, characterized in that: The contact system (2) further includes a separator (23), which is located between the first contact structure (21) and the second contact structure (22) in the length direction of the circuit breaker. The separator (23) includes a separation portion (232). When the first contact structure (21) and the second contact structure (22) are closed, the separator (23) is driven to move the separation portion (232) out from between the first contact point (2110) of the first contact structure (21) and the second contact point (2210) of the second contact structure (22). When the first contact structure (21) and the second contact structure (22) are disconnected, the separator (23) is driven to move the separation portion (232) into the space between the first contact point (2110) and the second contact point (2210).

11. The circuit breaker according to claim 1, characterized in that: The arc-extinguishing chamber (4) includes multiple arc-extinguishing grid plates (40), which are arranged side by side at intervals along the length of the circuit breaker; the rotation centers of the operating member (11), the first contact structure (21), and the second contact structure (22) are located at the three vertices of an acute triangle.

12. The circuit breaker according to claim 1, characterized in that: The circuit breaker housing is a U-shaped structure. The operating part (11) of the operating mechanism (1) is located on the upper part of the U-shaped structure, the arc extinguishing chamber (4) is located on the lower part of the U-shaped structure, the incoming terminal (31) and the outgoing terminal (32) are located at both ends of the lower part of the U-shaped structure, and the contact system (2) is located at the junction of the upper and lower parts of the U-shaped structure.

13. The circuit breaker according to claim 12, characterized in that: The thermal-magnetic tripping mechanism (5) includes a thermal tripping structure, a thermal tripping transmission component (55), a magnetic tripping structure, and a magnetic tripping transmission component (54). The thermal tripping transmission component (55) is located at the upper part of the U-shaped structure. The thermal tripping structure extends from the lower part of the U-shaped structure to the upper part. In the length direction of the circuit breaker, the upper ends of the operating component (11), the thermal tripping transmission component (55), and the thermal tripping structure are arranged side by side. The magnetic tripping transmission component (54) and the magnetic tripping structure are located at the lower part of the U-shaped structure. In the height direction of the circuit breaker, the magnetic tripping transmission component (54) and the magnetic tripping structure are arranged side by side. In the length direction of the circuit breaker, the magnetic tripping transmission component (54) is located between the contact system (2) and the incoming terminal (31), and the magnetic tripping structure is located between the arc-extinguishing chamber (4) and the incoming terminal (31).

14. The circuit breaker according to claim 1, characterized in that: The first contact structure (21) and the second contact structure (22) are symmetrically and synchronously rotated.

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