operating system

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to an operating system, wherein the trip buckle and the lock buckle are rotationally arranged on a front support or a rear support; in a direction d2, the front moving contact and the rear moving contact are arranged in a staggered mode, and the front static contact and the rear static contact are arranged in a staggered mode; in a direction d1, the front moving contact is arranged in a parallel mode opposite to the front static contact, and the rear moving contact is arranged in a parallel mode opposite to the rear static contact, wherein the direction d1 is perpendicular to the direction d2; in a split state and in the direction d2, the front moving contact is arranged in a parallel mode opposite to the rear static contact, and the rear moving contact is arranged in a parallel mode opposite to the front static contact; the operating system has simple structure and good breaking capacity.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to an operating system. Background Technology

[0002] In existing switchgear, when two sets of moving contacts are used in conjunction with two sets of stationary contacts, the following arrangements are generally adopted: Arrangement 1: The moving and stationary contacts are arranged side-by-side in a one-to-one configuration along a first direction, with both sets of moving contacts rotating coaxially with their rotation axis the same as the second direction, and the first and second directions perpendicular. Arrangement 2: The two sets of moving contacts are arranged opposite each other along the first direction and rotate synchronously in opposite directions, with two sets of stationary contacts positioned between the two sets of moving contacts. In compact switchgear (such as miniature circuit breakers), these arrangements often result in a small opening distance between the moving and stationary contacts and a small arc-extinguishing chamber, limiting the switching device's breaking and arc-extinguishing capabilities. In existing switchgear, the operating mechanism and contact system are often configured as two independent structures, resulting in numerous components and a large space occupation.

[0003] In addition, when existing switching devices are used to interrupt DC current, they need to be wired according to the forward and reverse wiring requirements; otherwise, the circuit breaker will be unable to extinguish the arc or the arc extinguishing effect will be severely affected. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide an operating system with a simple structure and good segmentation capability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An operating system includes a contact system, a rotatably mounted operating element, a connecting rod, and a latching element and a locking element that interlock and rotate independently. The contact system includes a front moving contact assembly and a rear moving contact assembly that rotate synchronously in opposite directions, and a stationary contact structure. The front moving contact assembly includes a front support and a front moving contact mounted on the front support; the rear moving contact assembly includes a rear support and a rear moving contact mounted on the rear support; the stationary contact structure includes a front stationary contact with a front stationary contact point and a rear stationary contact with a rear stationary contact point. The front moving contact assembly and the rear moving contact assembly close and open with the front stationary contact and the rear stationary contact respectively by synchronously rotating in opposite directions. The rotational axes of the operating element, the front moving contact assembly, the rear moving contact assembly, the latching element, and the locking element are all parallel to direction d2. The latching element and the locking element are rotatably mounted on the front or rear support, and the two ends of the connecting rod intersect with the operating element and the latching element respectively.

[0007] In direction d2, the front moving contact and the rear moving contact are staggered, and the front stationary contact and the rear stationary contact are staggered; in direction d1, the front moving contact and the front stationary contact are arranged side by side opposite each other, and the rear moving contact and the rear stationary contact are arranged side by side opposite each other, and directions d1 and d2 are perpendicular to each other; when the operating system is in the open state and in direction d2, the front moving contact and the rear stationary contact are arranged side by side, and the rear moving contact and the front stationary contact are arranged side by side.

[0008] Furthermore, on the orthogonal projection of the operating system in direction d2, the front moving contact and the rear moving contact are symmetrically arranged, the front stationary contact and the rear stationary contact are symmetrically arranged, and the front moving contact and the rear moving contact are cross-arranged when the operating system is in the closed state.

[0009] Furthermore, the stationary contact structure also includes a series conductor extending along direction d1, with the front stationary contact, the series conductor, and the rear stationary contact connected in series in sequence; the front moving contact of the front moving contact, the rear moving contact of the rear moving contact, the front stationary contact, and the rear stationary contact are all located in direction d3 between the series conductor and the arc-extinguishing system for cooperating with the contact system; directions d1, d2, and d3 are perpendicular to each other.

[0010] Furthermore, the series conductor is located between the front moving contact and the rear moving contact in direction d2.

[0011] Furthermore, the stationary contact structure also includes a conductive crossbeam, the front stationary contact also includes a front support plate, the front stationary contact is disposed on one side of the front support plate, the rear stationary contact includes a rear support plate, the rear stationary contact is disposed on one side of the rear support plate, the front support plate, the conductive crossbeam and the rear support plate are connected in sequence and are an integral structure, one end of the front support plate and the rear support plate are bent to the same side relative to the conductive crossbeam, and the conductive crossbeam serves as a series conductor.

[0012] Furthermore, in the direction d2, a front clearance notch is provided on one side of the rear bearing plate and the conductive crossbeam, and a rear clearance notch is provided on one side of the front bearing plate and the conductive crossbeam, with the front clearance notch and the rear clearance notch located on both sides of the conductive crossbeam respectively; in the direction d1, the front clearance notch is arranged side by side with the front bearing plate and is used to avoid the front moving contact, and the rear clearance notch is arranged side by side with the rear bearing plate and is used to avoid the rear moving contact.

[0013] Furthermore, the front support plate includes a front support main plate and a front support connecting plate that are bent and connected together, and the rear support plate includes a rear support main plate and a rear support connecting plate that are bent and connected together. The front support connecting plate, the conductive crossbeam, and the rear support connecting plate are connected in sequence and form a Z-shaped structure. The front support connecting plate and the rear support connecting plate are parallel to each other. The widths of the front support plate and the rear support plate in direction d2 are the same and greater than the width of the conductive crossbeam in direction d2. In the orthogonal projection of the operating system with direction d1, the ends of the front support plate and the rear support plate that are close to each other coincide with the conductive crossbeam, and the other ends of the front support plate and the rear support plate are located on both sides of the conductive crossbeam. In the orthogonal projection of the operating system with direction d2, the rear support plate and the conductive crossbeam overlap with the swing path of the front moving contact, and the swing paths of the front support plate and the conductive crossbeam overlap with the swing path of the rear moving contact.

[0014] Furthermore, the end of the front bearing motherboard connected to the front bearing connecting plate is the first upper end and the other end is the first lower end, and the end of the rear bearing motherboard connected to the rear bearing connecting plate is the second upper end and the other end is the second lower end; on the orthogonal projection of the operating system in the projection direction of direction d2, the distance between the first upper end and the second upper end is less than the distance between the first lower end and the second lower end.

[0015] Furthermore, the series conductor, the front stationary contact, and the rear stationary contact are separate structures; the front stationary contact also includes a front support plate, and the front stationary contact point is disposed on one side of the front support plate; the rear stationary contact also includes a rear support plate, and the rear stationary contact point is disposed on one side of the rear support plate; the two ends of the series conductor are electrically connected to the front support plate and the rear support plate, respectively.

[0016] Furthermore, the front moving contact assembly also includes a front support, the front moving contact assembly is rotatably configured via the front support, and one end of the front moving contact is disposed on the front support; the rear moving contact assembly also includes a rear support, the rear moving contact assembly is rotatably configured via the rear support, and one end of the rear moving contact is disposed on the rear support; the other end of the front moving contact and the other end of the rear moving contact respectively cooperate with the front stationary contact and the rear stationary contact.

[0017] Furthermore, the front moving contact is disposed on one axial end of the front support and this end is the front support mounting end, and the rear moving contact is disposed on one axial end of the rear support and this end is the rear support mounting end, with the front support mounting end and the rear support mounting end facing opposite directions.

[0018] Furthermore, the front moving contact assembly also includes a front contact spring, which is a torsion spring; the operating system also includes a first mounting post disposed on the front support mounting end, the front support including a front support limiting part disposed on the front support mounting end, the first mounting post and the front support being an integral structure or a separate structure; the front moving contact includes a front moving contact plate mounting section and a front moving contact plate limiting part disposed at one end thereto, the front moving contact plate mounting section having a front moving contact plate mounting hole, the front moving contact being rotatably sleeved on the first mounting post through the front moving contact plate mounting hole, the front contact spring being sleeved on the first mounting post, one spring arm cooperating with the front moving contact plate limiting part and the other spring arm cooperating with the front support limiting part, so that the front moving contact plate limiting part and the front support limiting part abut and limit each other, the front moving contact plate limiting part and the front support limiting part being located between the two spring arms.

[0019] Furthermore, the rear moving contact assembly also includes a rear contact spring, which is a torsion spring; the operating system also includes a second mounting post disposed on the rear support mounting end, the rear support including a rear support limiting part disposed on the rear support mounting end, the second mounting post and the rear support being an integral structure or a separate structure; the rear moving contact includes a rear moving contact plate mounting section and a rear moving contact plate limiting part disposed at one end thereto, the rear moving contact plate mounting section having a rear moving contact plate mounting hole, the rear moving contact being sleeved on the second mounting post through the rear moving contact plate mounting hole, the rear contact spring being sleeved on the second mounting post, one spring arm cooperating with the rear moving contact plate limiting part and the other spring arm cooperating with the rear support limiting part, so that the rear moving contact plate limiting part and the rear support limiting part abut and limit each other, the rear moving contact plate limiting part and the rear support limiting part being located between the two spring arms.

[0020] Furthermore, the operating system also includes a locking spring, which engages with both the locking member and the rear support. The locking spring is used to maintain a latching engagement between the locking member and the jumper and to limit the engagement between the locking member and the rear support after the operating system is disengaged. The other axial end of the rear support is the rear support bearing end, and the jumper, locking member, and locking spring are all disposed on the rear support bearing end.

[0021] Furthermore, the front support and the rear support are connected by a drive mechanism.

[0022] Furthermore, the front support includes a first gear that is coaxially and synchronously rotated with it, and the rear support includes a second gear that is coaxially and synchronously rotated with it, with the first gear and the second gear meshing together.

[0023] Furthermore, the operating system also includes a main reset component, which is a torsion spring; the operating system also includes a first rear positioning post, and the front support also includes a front support reset part. The first rear positioning post and the front support reset part are both disposed on the other axial end of the front support. The main reset component is sleeved on the first rear positioning post. One spring arm is fixedly disposed on the housing structure for accommodating the operating system, and another spring cooperates with the front support reset part. The main reset component causes the front moving contact assembly and the rear moving contact assembly to have a tendency to rotate in opposite directions and disconnect from the front stationary contact and the rear stationary contact, respectively.

[0024] The operating system of this invention employs a novel double-break layout for its front moving contact assembly, rear moving contact assembly, front stationary contact, and rear stationary contact. Within a limited space, this allows for a larger opening distance between the front moving contact assembly and the front stationary contact, and between the rear moving contact assembly and the rear stationary contact, thereby improving the breaking capacity of the contact system. When applied to the circuit breaker of this embodiment, it also enhances the breaking capacity of the circuit breaker. The trip fastener and locking fastener are rotatably mounted on the front or rear support, reducing the number of parts, improving structural compactness, and lowering the required installation space.

[0025] Furthermore, the placement of the series conductor ensures that, regardless of the current direction within the contact system, the electromagnetic field generated by the series conductor tends to drive the arc generated by the moving contact mechanism and the stationary contact structure to move away from the contact system in the same direction, thus protecting the contact system. When the contact system is applied to a circuit breaker, the electromagnetic field of the series conductor always drives the arc to move towards the arc-extinguishing chamber, improving the arc-extinguishing efficiency and effectiveness. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the circuit breaker of the present invention, showing the front structure of the circuit breaker;

[0027] Figure 2 This is a schematic diagram of the circuit breaker of the present invention, and... Figure 1 Compared to other circuit breakers, which at least eliminate the need for a housing, isolation structure, first terminal, and second terminal, the circuit breaker in the open state;

[0028] Figure 3 This is a schematic diagram of the circuit breaker of the present invention, and... Figure 1 Compared to other circuit breakers, which at least eliminate the need for a housing, isolation structure, first terminal, and second terminal, the circuit breaker in the closed state;

[0029] Figure 4 This is a schematic diagram of the circuit breaker of the present invention, and... Figure 3 Compared to other methods, at least the front and rear arc-extinguishing chambers have been eliminated;

[0030] Figure 5 This is a schematic diagram of the circuit breaker of the present invention, showing the rear structure of the circuit breaker;

[0031] Figure 6 This is a schematic diagram of the circuit breaker of the present invention, and... Figure 5 Compared to other methods, it eliminates the need for the front arc-extinguishing chamber, rear arc-extinguishing chamber, first terminal, and second terminal.

[0032] Figure 7 This is an orthogonal projection view of the operating mechanism and contact system of the present invention in the assembled state, with the projection direction being direction d2;

[0033] Figure 8 This is an orthogonal projection view of the operating mechanism and contact system of the present invention in the assembled state, with the projection direction being direction d1;

[0034] Figure 9 This is a schematic diagram of the front moving contact assembly of the present invention. Sub-figures (1) and (2) show the structure of the front moving contact assembly from two different perspectives.

[0035] Figure 10 This is a schematic diagram of the structure of the front moving contact of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure previously supported by this invention;

[0037] Figure 12 This is a schematic diagram of the structure of the rear moving contact assembly of the present invention. Sub-figures (1) and (2) show the structure of the rear moving contact assembly from two different perspectives.

[0038] Figure 13 This is a schematic diagram of the structure of the rear moving contact of the present invention;

[0039] Figure 14 This is a schematic diagram of the structure supported by the present invention;

[0040] Figure 15 This is a schematic diagram of the static contact bridge of the present invention;

[0041] Figure 16 This is a schematic diagram of the static contact structure, the third arc-starting plate, and the fourth arc-starting plate of the present invention in an assembled state;

[0042] Figure 17 This is an orthogonal projection view of the operating mechanism and the rear moving contact assembly of the present invention in the assembled state, with the projection direction being direction d2.

[0043] Figure 18 This is a schematic diagram of the structure of the operating component of the present invention. Sub-figures (1) and (2) show the structure of the operating component from two different perspectives.

[0044] Figure 19 This is a schematic diagram of the locking mechanism of the present invention;

[0045] Figure 20 This is a schematic diagram of the structure of the jump fastener of the present invention;

[0046] Figure 21 This is a schematic diagram of the structure of the second terminal block of the present invention;

[0047] Figure 22 This is an orthogonal projection view of the arc extinguishing system of the present invention with the projection direction being direction d2;

[0048] Figure 23 This is the present invention. Figure 22 A structural schematic diagram of section 10-10;

[0049] Figure 24 This is a schematic diagram of the isolation structure of the present invention. Sub-figures (1) and (2) show the structure of the isolation structure from two different perspectives.

[0050] Figure 25 This is an orthogonal projection view of the contact system, arc-starting plate structure, front arc-extinguishing chamber and rear arc-extinguishing chamber of the present invention in the assembled state, with the projection direction being direction d2;

[0051] Figure 26 This is the present invention. Figure 25 Schematic diagram of section 20-20;

[0052] Figure 27 This is a schematic diagram of the structure of the left spacer of the present invention. Sub-figures (1) and (2) show the structure of the left spacer from two different perspectives.

[0053] Figure 28 This is a schematic diagram of the structure of the right spacer of the present invention. Sub-figures (1) and (2) show the structure of the right spacer from two different perspectives.

[0054] Figure 29 This is a schematic diagram of the force on the arc generated when the moving contact mechanism and the stationary contact structure of the present invention are disconnected. Sub-figures (1) and (2) show the force on the arc of the contact system under two current directions.

[0055] Explanation of reference numerals in the attached figures

[0056] Casing 90;

[0057] Contact system 100;

[0058] Moving contact mechanism 110;

[0059] The front moving contact assembly 120 includes a front moving contact 121, a front moving contact point 1211, a front moving contact plate 1212, a front moving contact plate bearing section 1213, a front moving contact plate connecting section 1214, a front moving contact plate mounting section 1215, a front moving contact plate limiting part 1216, a front moving contact plate mounting hole 1217, and a front moving contact plate connecting protrusion 1218; a front support 122 includes a front support body 1221, a first mounting post 1222, a first gear 1223, a first rear positioning post 1224, a front support limiting part 1225, a front support reset part 1226, and a front contact spring 123.

[0060] The rear moving contact assembly 130, rear moving contact 131, rear moving contact point 1311, rear moving contact plate 1312, rear moving contact plate bearing section 1313, rear moving contact plate connecting section 1314, rear moving contact plate mounting section 1315, rear moving contact plate limiting part 1316, rear moving contact plate mounting hole 1317, rear moving contact plate connecting protrusion 1318, rear support 132, rear support body 1321, second mounting post 1322, rear support limiting part 1324, jump buckle shaft 1325, jump buckle stop part 1326, lock buckle stop part 1327, second gear 1323, and rear contact spring 133;

[0061] Main reset component 140;

[0062] The stationary contact structure is 150, the front stationary contact is 151, the rear stationary contact is 152, the stationary contact bridge is 154, the front bearing plate is 1531, the front bearing main plate is 15311, the front bearing connecting plate is 15312, the front welding area is 15313, the rear bearing plate is 1532, the rear bearing main plate is 15321, the rear bearing connecting plate is 15322, the rear welding area is 15323, the conductive crossbeam is 153, the front stationary contact is 155, and the rear stationary contact is 156.

[0063] Operating mechanism 200, operating component 201, operating part 2011, operating component body 2012, operating component shaft hole 2013, operating component connecting hole 2014, operating component shaft column 2015, connecting rod 202, jump fastener 203, jump fastener body 2031, jump fastener latching part 2032, jump fastener mounting hole 2033, jump fastener connecting hole 2034, locking component 204, locking component mounting part 2041. Locking element limiting part 2042, locking element first arm 2043, locking element second arm 2044, locking element moving post 2045, locking element spring limiting part 2046, locking element mounting hole 2047, locking element latching part 2048, hot release transmission element 205, transmission element front arm 2051, transmission element rear arm 2052, transmission element mounting part 2053, operating element spring 206, locking element spring 207;

[0064] Arc extinguishing system 300;

[0065] Isolation structure 400, conductor mounting hole 401, left mounting groove 4011, right mounting groove 4012, left isolator 410, front chamber 420, front limiting structure 430, front lower limiting structure 431, front upper limiting structure 432, left splicing structure 433, left lower splicing structure 4331, left upper splicing structure 4332; first front baffle 440, first through hole 4401, second front baffle 441, right isolator 450, rear chamber 460, rear limiting structure 470, rear lower limiting structure 471, rear upper limiting structure Structure 472, right splicing structure 473, lower right splicing structure 4731, upper right splicing structure 4732, first rear baffle 480, second rear baffle 481, second through hole 4811, partition plate 490, left partition plate 491, right partition plate 492, front stationary contact position 493, rear stationary contact position 494, front inlet 4951, front contact area 4952, front mounting area 4953, front outlet 4954, rear inlet 4961, rear contact area 4962, rear mounting area 4963, rear outlet 4964;

[0066] Front arc-extinguishing chamber 510; rear arc-extinguishing chamber 520; arc-extinguishing grid 530;

[0067] First arc-starting plate 610; Second arc-starting plate 620; Third arc-starting plate 630; Fourth arc-starting plate 640;

[0068] Thermomagnetic tripping device 700, magnetic yoke 710, armature 720, armature body 721, armature drive finger 722, armature spring 730, bimetallic strip 740, mounting part 750, mounting part connecting part 751, mounting part mounting part 752, mounting part adjusting part 753, adjusting screw 760;

[0069] First terminal 810; Second terminal 820; First terminal block 830; Second terminal block 840; Wiring mating plate 841; Outer plate 842; Base plate 843; Inner plate 844; Wiring connecting plate 845; First section of connecting plate 846; Second section of connecting plate 847; Spring plate 848; Armature support part 8491; Armature limiting part 8492; First flexible connection 850; Second flexible connection 860; Third flexible connection 870;

[0070] Arrow 70. Detailed Implementation

[0071] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions in the following embodiments.

[0072] This invention discloses a circuit breaker.

[0073] like Figure 1-7 As shown, this is one embodiment of a circuit breaker.

[0074] The circuit breaker of this embodiment includes a housing 90 and an operating mechanism 200, a contact system 100, and an arc extinguishing system 300, all disposed within the housing 90. The contact system 100 includes a moving contact mechanism 110 and a stationary contact structure 150 that work together. The operating mechanism 200 is connected to the moving contact mechanism 110 and drives the moving contact mechanism 110 and the stationary contact structure 150 to close and open. The arc extinguishing system 300 is used to extinguish the electric arc generated by the moving contact mechanism 110 and the stationary contact structure 150.

[0075] Furthermore, the circuit breaker in this embodiment also includes a terminal block, and the contact system 100 is electrically connected to an external circuit (i.e., the circuit to which the circuit breaker in this embodiment is connected, and the circuit breaker in this embodiment can connect or disconnect the circuit) through the terminal block.

[0076] Furthermore, the circuit breaker in this embodiment also includes a thermomagnetic tripping device 700 disposed in the housing 90. The thermomagnetic tripping device 700 cooperates with the operating mechanism 200 to drive the operating mechanism 200 to trip when a short circuit or overload fault occurs in the circuit where the circuit breaker of this embodiment is located, thereby causing the circuit breaker of this embodiment to open.

[0077] like Figure 1-7 As shown, in this embodiment, the length, width, and height directions of the circuit breaker are parallel to directions d1, d2, and d3, respectively, and directions d1, d2, and d3 are perpendicular to each other.

[0078] Specifically, such as Figure 1 and 5 The directions shown are as follows: direction d1 is the left-right direction of the drawing, direction d2 is the inside-outside direction of the drawing, and direction d3 is the top-bottom direction of the drawing.

[0079] like Figure 1-7As shown, in the circuit breaker of this embodiment, the operating mechanism 200 includes an operating member 201, a connecting rod 202, a trip fastener 203, a locking member 204, a locking member spring 207, and a rotating plate rotatably mounted on the housing 90. The operating member 201 and the rotating plate are rotatably mounted on the housing 90, and the trip fastener 203 and the locking member 204 are rotatably mounted on the rotating plate and are engaged with each other. The rotation axes of the operating member 201, the trip fastener 203, and the locking member 204 are all parallel to direction d2. The two ends of the connecting rod 202 are hinged to the operating member 201 and the trip fastener 203, respectively. The locking member spring 207 cooperates with the locking member 204 and the rotating plate, respectively, to keep the locking member 204 and the trip fastener 203 engaged and to limit the engagement between the locking member 204 and the rear support 132 after the operating mechanism 200 is disengaged. The operating member 201, the contact system 100, and the arc extinguishing system 300 are arranged sequentially along direction d3. The jump fastener 203 has a latching position and a release position. The jump fastener 203 rotates between these two positions. In the latching position, the jump fastener 203 engages with the locking fastener 204. After disengaging from the locking fastener 204, the jump fastener 203 rotates to the release position. The operating mechanism 200 employs a four-bar linkage mechanism, and its working process and operating principle are the same as existing technologies, and will not be described further here. Furthermore, the operating component 201 includes an operating part 2011 and an operating component body 2012. The operating component 201 is rotatably mounted on the housing 90. One end of the operating part 2011 is connected to the circumferential sidewall of the operating component body 2012, and the other end protrudes outside the housing 90 for operation. The operating component body 2012 includes operating component shafts 2015 respectively disposed at its two axial ends. The operating component body 2012 is rotatably mounted on the housing 90 through the operating component shafts 2015. The operating component body 2012 is provided with an operating component connecting hole 2014 extending in the direction d2. The operating component connecting hole 2014 is arranged parallel to and spaced apart from the rotation axis of the operating component 201. One end of the connecting rod 202 is rotatably inserted into the operating component connecting hole 2014. Furthermore, the operating mechanism 200 also includes an operating spring 206, which acts on the operating member 201 to give it a tendency to rotate towards the operating member open position. The operating spring 206 is preferably a torsion spring, sleeved on an operating member shaft 2015, with one spring arm cooperating with the operating member body 2012 and the other spring arm cooperating with the housing 90. Furthermore, the operating member 201 also includes an operating member shaft hole 2013, which is used to insert a linkage shaft. When multiple circuit breakers are used side-by-side, the linkage shaft enables synchronous linkage of multiple operating members 201.

[0080] like Figure 17As shown, the present invention also discloses an operating device, which includes an operating mechanism 200 and a front moving contact assembly 120 of a moving contact mechanism 110; the specific structure of the operating device will be described later.

[0081] like Figure 1-4 As shown in Figures 7 and 8, the present invention also discloses an operating system, which includes an operating mechanism 200 and a contact system 100; the specific structure of the operating system will be described later.

[0082] like Figure 1-3 As shown in 5, 22-29, the present invention also discloses an arc extinguishing device, which includes a stationary contact structure 150 and an arc extinguishing system 300; the specific structure of the arc extinguishing device will be described later.

[0083] like Figure 2-16 The image shows one embodiment of the contact system 100.

[0084] like Figure 1-7 As shown, the moving contact mechanism 110 includes a front moving contact assembly 120 and a rear moving contact assembly 130 that are synchronously and in opposite directions and whose rotation axes are both parallel to direction d2. The front moving contact assembly 120 includes a front moving contact 121, and the rear moving contact assembly 130 includes a rear moving contact 131. The stationary contact structure 150 includes a front stationary contact 155 and a rear stationary contact 156 that respectively cooperate with the front moving contact 121 and the rear moving contact 131. The front stationary contact 155 includes a front stationary contact point 151, and the rear stationary contact 156 includes a rear stationary contact point 152. The front moving contact assembly 120 and the rear moving contact assembly 130 are driven by the operating mechanism 200 to rotate synchronously in opposite directions, thereby closing and opening synchronously with the front stationary contact 155 and the rear stationary contact 156, respectively. That is, the front moving contact 121 and the rear moving contact 131 close and open synchronously with the front stationary contact 151 and the rear stationary contact 152, respectively. The front moving contact assembly 120 closes and opens with the front stationary contact 155 by rotating in opposite directions, and the rear moving contact assembly 130 closes and opens with the rear stationary contact 156 by rotating in opposite directions. The term "synchronous reverse rotation" means that as long as the front moving contact assembly 120 and the rear moving contact assembly 130 rotate synchronously, their rotation directions must be opposite; in other words, the real-time rotation directions of the front moving contact assembly 120 and the rear moving contact assembly 130 are opposite.

[0085] like Figure 2-7As shown, the stationary contact structure 150 also includes a series conductor, and the front stationary contact 155 and the rear stationary contact 156 are electrically connected by the series conductor (for example, the series conductor can be implemented by the conductive beam 153 of the stationary contact structure 150, which will be described later); when the moving contact mechanism 110 is closed with the stationary contact structure 150, the front moving contact assembly 120, the front stationary contact 155, the rear stationary contact 156 and the rear moving contact assembly 130 are connected in series in sequence. Furthermore, in the circuit breaker of the present invention, the wiring terminals include a first terminal 810 and a second terminal 820. The first terminal 810, the contact system 100, and the second terminal 820 are connected in series, that is, the first terminal 810, the front moving contact assembly 120, the front stationary contact 155, the rear stationary contact 156, the rear moving contact assembly 130, and the second terminal 820 are connected in series, or the second terminal 820, the front moving contact assembly 120, the front stationary contact 155, the rear stationary contact 156, and the first terminal 810 are connected in series. The circuit breaker in this embodiment is a 1P circuit breaker. Furthermore, in the circuit breaker of this embodiment, the first terminal 810, the front moving contact assembly 120, the front stationary contact 155, the rear stationary contact 156, the rear moving contact assembly 130, and the second terminal 820 are connected in series.

[0086] In another embodiment of the stationary contact structure 150, the front stationary contact 155 and the rear stationary contact 156 are arranged independently of each other. When the moving contact mechanism 110 is closed with the stationary contact structure 150, the front moving contact assembly 120 and the front stationary contact 155 are closed and conductive, forming a first contact pair; the rear moving contact assembly 130 and the rear stationary contact 156 are closed and conductive, forming a second contact pair. The first contact pair and the second contact pair are connected in parallel. Further, the terminal block includes two sets of first terminals 810 and two sets of second terminals 820. One set of first terminals 810 and second terminals 820 are connected in series across the front moving contact assembly 120 and the front stationary contact 155, while the other set of first terminals 810 and second terminals 820 are connected in series across the rear moving contact assembly 130 and the rear stationary contact 156. The front moving contact assembly 120 and the front stationary contact 155 are connected in parallel with the rear moving contact assembly 130 and the rear stationary contact 156, so the circuit breaker of the present invention can be used as a two-phase circuit breaker; or, the two sets of first terminals 810 (or second terminals 820) are connected in series, so that the front moving contact assembly 120, the front stationary contact 155, the rear moving contact assembly 130, and the rear stationary contact 156 are connected in series. When the contact system 100 is broken, the two break points formed in the circuit are shared, which is conducive to the extinguishing of the arc. In addition, the two sets of second terminals 820 (or first terminals 810) are located at the same end of the circuit breaker in the direction d1, which is more convenient for wiring. In this case, the circuit breaker of the present invention can be used as a single-phase circuit breaker.

[0087] like Figure 2-7As shown, the series conductor extends along direction d1, and the front moving contact 1211, front stationary contact 151, rear moving contact 1311, and rear stationary contact 152 are located between the series conductor and the arc-extinguishing system 300 in direction d3. The series conductor is positioned such that regardless of the current direction within the contact system 100 (current direction is front moving contact 121 → front stationary contact 155 → series conductor → rear stationary contact 156 → rear moving contact 131 (e.g.)),... Figure 29 (as shown in sub-diagram (2)) or rear moving contact 131 → rear stationary contact 156 → series conductor → front stationary contact 155 → front moving contact 121 (as shown in sub-diagram (2)) Figure 29 As shown in the sub-figure (1), the electromagnetic fields generated by the series conductors all have the ability to drive the electric arc generated by the moving contact mechanism 110 and the stationary contact structure 150. Figure 29 (Represented by dashed lines) The tendency to move away from the contact system 100 and towards the arc-extinguishing system 300 in the same direction ( Figure 29 In the diagram, arrow 70 indicates the direction of arc movement, which protects the contact system and improves arc extinguishing efficiency and effectiveness.

[0088] like Figure 2-8 As shown, in direction d2, the front moving contact 121 and the rear moving contact 131 are staggered, and the front stationary contact 151 of the front stationary contact 155 and the rear stationary contact 152 of the rear stationary contact 156 are staggered; that is, the front moving contact 121 and the rear moving contact 131 are staggered in direction d2, and the front stationary contact 151 and the rear stationary contact 152 are staggered in direction d2. In the open state of the circuit breaker of this embodiment, in direction d2, the front moving contact 121 and the rear stationary contact 156 are side by side, and the rear moving contact 131 and the front stationary contact 155 are side by side; that is, in the open state of the circuit breaker of this embodiment, the front moving contact 121 and the rear stationary contact 156 are side by side along direction d2, and the rear moving contact 131 and the front stationary contact 155 are side by side along direction d2. In the direction d1, the front moving contact 121 and the front stationary contact 155 are arranged side by side, and the front moving contact 121 and the front stationary contact 151 are also arranged side by side along the direction d1. The rear moving contact 131 and the rear stationary contact 156 are arranged side by side along the direction d1, and the rear moving contact 131 and the rear stationary contact 152 are also arranged side by side along the direction d1. That is, the front moving contact 121 and the front stationary contact 155 are arranged side by side along the direction d1, the front moving contact 121 and the front stationary contact 151 are also arranged side by side along the direction d1, the rear moving contact 131 and the rear stationary contact 156 are arranged side by side along the direction d1, and the rear moving contact 131 and the rear stationary contact 152 are also arranged side by side along the direction d1.

[0089] In the contact system 100, the front moving contact assembly 120, the rear moving contact assembly 130, the front stationary contact 155, and the rear stationary contact 156 adopt a novel double-break staggered arrangement. Within a limited space, a larger opening distance can be achieved between the front moving contact assembly 120 and the front stationary contact 155, and between the rear moving contact assembly 130 and the rear stationary contact 156, thereby improving the breaking capacity of the contact system 100. When applied to the circuit breaker of this embodiment, it also improves the breaking capacity of the circuit breaker of this embodiment.

[0090] like Figure 2-7 As shown, the rotating shafts of the front moving contact assembly 120 and the rear moving contact assembly 130 are arranged side by side at intervals along direction d1. On the orthogonal projection of the circuit breaker, the operating system, and the contact system 100 with the projection direction of direction d2, the front moving contact 121 and the rear moving contact 131 are arranged side by side along direction d1 when the contact system 100 is in the open state (that is, the circuit breaker in this embodiment is in the open state). When the contact system 100 is in the closed state (that is, the circuit breaker in this embodiment is in the closed state), the front moving contact 121 and the rear moving contact 131 are arranged in a cross shape. In fact, when the contact system 100 is in the closed state, since the front moving contact 121 and the rear moving contact 131 are misaligned in direction d2, there is no direct contact between them. Furthermore, on the orthogonal projection of the circuit breaker, operating system, and contact system 100 in the direction d2, the front stationary contact 151 and the rear stationary contact 152 are symmetrically arranged. Furthermore, on the orthogonal projection of the circuit breaker, operating system, and contact system 100 in the direction d2, the front moving contact 121 and the rear moving contact 131 are symmetrically arranged, and the front stationary contact 155 and the rear stationary contact 156 are symmetrically arranged.

[0091] In another embodiment of the contact system 100, the rotating axes of the front moving contact assembly 120 and the rear moving contact assembly 130 coincide. On the orthogonal projection of the contact system 100 along direction d2, the angle between the front moving contact 121 and the rear moving contact 131 is the contact angle. When the contact system 100 is in the open state (i.e., the circuit breaker of this invention is in the open state), the front moving contact 121 and the rear moving contact 131 are respectively located on the first side and the second side of the angle bisector of the contact angle, where the first side and the second side are the angle bisectors of the contact angle. On opposite sides of the line, when the contact system 100 is in the closed state (i.e., the circuit breaker of the present invention is in the closed state), the front moving contact 121 and the rear moving contact 131 are respectively located on the second side and the first side of the angle bisector of the contact angle; that is, when the contact system 100 switches from the open state to the closed state, the front moving contact 121 rotates from the first side of the angle bisector of the contact angle to the second side of the angle bisector of the contact angle, and the rear moving contact 131 rotates from the second side of the angle bisector of the contact angle to the first side of the angle bisector of the contact angle.

[0092] like Figure 1-7 As shown, the front moving contact assembly 120 and the rear moving contact assembly 130 are connected in a transmission manner to achieve synchronous and opposite rotation. Furthermore, the operating mechanism 200 is connected in a transmission manner to either the front moving contact assembly 120 or the rear moving contact assembly 130; during operation, the operating mechanism 200 drives the front moving contact assembly 120 (or the rear moving contact assembly 130) to rotate, and the front moving contact assembly 120 (or the rear moving contact assembly 130) drives the rear moving contact assembly 130 (or the front moving contact assembly 120) to rotate, causing the front moving contact assembly 120 and the rear moving contact assembly 130 to rotate synchronously in opposite directions.

[0093] like Figure 1-7 As shown, in the circuit breaker of this embodiment, the operating mechanism 200 is served by the rear support 132 of the rear moving contact assembly 130. The cooperation relationship between the rear support 132 and the other operating mechanisms 200 will be described in detail later.

[0094] In another embodiment of the rotating plate of the operating mechanism 200, the rotating plate is served by the front support 122 of the front moving contact assembly 120.

[0095] In another embodiment of the rotating plate of the operating mechanism 200, the rotating plate is a structure independent of the front moving contact assembly 120 and the rear moving contact assembly 130. The rotating plate is connected to the front moving contact assembly 120 or the rear moving contact assembly 130 via a connecting rod, or the rotating plate is connected to an intermediate transmission structure that is connected to the front moving contact assembly 120 and the rear moving contact assembly 130 via a connecting rod.

[0096] Specifically, such as Figure 1-7As shown, the front moving contact assembly 120 further includes a front support 122, which is rotatably mounted on the housing 90 via the front support 122. One end of the front moving contact 121 is mounted on the front support 122, and the other end is provided with a front moving contact point 1211. The rear moving contact assembly 130 further includes a rear support 132, which is rotatably mounted on the housing 90 via the rear support 132. One end of the rear moving contact 131 is mounted on the rear support 132, and the other end is provided with a rear moving contact point 1311. The front support 122 and the rear support 132 are arranged side by side along direction d1, and their rotation axes are parallel and spaced apart from each other. The front support 122 and the rear support 132 are arranged as a whole, and are arranged sequentially along direction d3 with the stationary contact structure 150 and the arc extinguishing system 300. Furthermore, the front support 122 and the rear support 132 are connected to each other via a transmission mechanism to achieve a transmission connection between the front moving contact assembly 120 and the rear moving contact assembly 130. Furthermore, the front support 122 includes a first gear 1223 coaxially and synchronously rotatable therewith, and the rear support 132 includes a second gear 1323 coaxially and synchronously rotatable therewith. The first gear 1223 and the second gear 1323 mesh with each other to enable a transmission connection between the front support 122 and the rear support 132.

[0097] In another embodiment where the front moving contact assembly 120 and the rear moving contact assembly 130 are connected to each other, the front support 122 and the rear support 132 are not directly connected. Instead, they are indirectly connected through an intermediate transmission structure independent of the front moving contact assembly 120 and the rear moving contact assembly 130. For example, the intermediate transmission structure can be a rack that moves along direction d3, located between and meshing with the first gear 1223 and the second gear 1323. The operating mechanism 200 drives the rack to move, which in turn drives the front support 122 and the rear support 132 to rotate synchronously in opposite directions. It should be noted that the aforementioned intermediate transmission structure is not limited to the one implementation described above. Those skilled in the art can make various other modifications using conventional techniques, all of which should fall within the scope of protection of this application.

[0098] like Figure 2-8As shown, the circuit breaker in this embodiment also includes a main reset member 140. The main reset member 140 acts on the operating mechanism 200 or the contact system 100, causing the front moving contact assembly 120 and the rear moving contact assembly 130 to rotate synchronously in opposite directions, thus disconnecting from the front stationary contact 155 and the rear stationary contact 156 respectively. Specifically, when the circuit breaker in this embodiment switches from the closed state to the open state, and when the circuit breaker in this embodiment trips in the closed state, the main reset member 140 drives the front moving contact assembly 120 and the rear moving contact assembly 130 to rotate synchronously in opposite directions, thus disconnecting from the front stationary contact 155 and the rear stationary contact 156 respectively. Furthermore, the main reset member 140 directly acts on the front moving contact assembly 120, and the cooperation method between the main reset member 140 and the front moving contact assembly 120 will be described in detail later.

[0099] like Figure 9-11 The image shows one embodiment of the front moving contact assembly 120.

[0100] like Figure 9 As shown in sub-figure (1), the front moving contact assembly 120 of this embodiment includes a front moving contact 121, a front support 122 and a front contact spring 123. One end of the front moving contact 121 is disposed on the front support 122 and is rotatably disposed relative to the front support 122. The front contact spring 123 acts on the front moving contact 121 and the front support 122 respectively to limit their engagement and maintain a relatively stationary state. When the front moving contact 121 and the front stationary contact 155 are closed, the front moving contact 121 rotates relative to the front support 122. The front moving contact 121 drives the front contact spring 123 to store energy. The force applied by the front contact spring 123 to the front moving contact 121 causes the front moving contact 121 to press the front stationary contact 155, so that the front moving contact 121 and the front stationary contact 155 are reliably closed. Furthermore, the front moving contact 121 is disposed on one axial end of the front support 122, and this end is the front support mounting end. One end of the front moving contact 121 and the front contact spring 123 are disposed on the front support mounting end.

[0101] Specifically, such as Figure 9As shown in sub-figures (1) and 11, the operating system further includes a first mounting post 1222 disposed on the front support mounting end, and the front support 122 further includes a front support limiting part 1225 disposed on the front support mounting end; the front contact spring 123 is a torsion spring; the front moving contact 121 further includes a front moving contact plate mounting section 1215 and a front moving contact plate limiting part 1216 disposed at one end thereof, the front moving contact plate mounting section 1215 is provided with a front moving contact plate mounting hole 1217, and the front moving contact 121... The front contact spring 123 is rotatably sleeved on the first mounting post 1222 through the front moving contact plate mounting hole 1217. One spring arm cooperates with the front moving contact plate limiting part 1216 and the other spring arm cooperates with the front support limiting part 1225, so that the front moving contact plate limiting part 1216 and the front support limiting part 1225 abut and limit each other. The front moving contact plate limiting part 1216 and the front support limiting part 1225 are located between the two spring arms of the front contact spring 123. Furthermore, the front support 122 also includes a front support body 1221, which is rotatably mounted via the front support body 1221. One axial end of the front support body 1221 is the front support mounting end. The first mounting post 1222 is coaxially mounted with the front support 122, meaning the rotation axes of the front movable contact 121 and the front support 122 coincide. The front support limiting part 1225 is a protrusion that protrudes along the axial direction of the front support 122. One end of the front movable contact plate limiting part 1216 is bent and connected to the front movable contact plate mounting section 1215, and the other end of the front movable contact plate limiting part 1216 extends away from the front support body 1221 relative to the front movable contact plate mounting section 1215. Furthermore, the first mounting post 1222 and the front support 122 are either an integral structure or a separate structure. In this embodiment, they are preferably an integral structure, meaning the front support 122 includes the first mounting post 1222 and the front support limiting part 1225.

[0102] As another embodiment of the first mounting post 1222, the first mounting post 1222 is a front moving contact mounting shaft with one end inserted into the front support 122. The front moving contact mounting shaft needs to have a certain outer diameter so that the front contact spring 123 can be sleeved on it and reliably positioned in the working position.

[0103] Furthermore, the main reset member 140 is a torsion spring; the operating system also includes a first rear positioning post 1224, and the front support 122 also includes a front support reset part 1226. Both the first rear positioning post 1224 and the front support reset part 1226 are disposed at the other axial end of the front support 122 (i.e., the end of the front support 122 opposite to the front support mounting end along the axial direction of the front support 122). The main reset member 140 is sleeved on the first rear positioning post 1224. One spring arm is fixedly disposed on the housing structure (specifically, housing 90) for accommodating the contact system 100, and the other spring arm cooperates with the front support reset part 1226. Furthermore, the front support reset part 1226 is a protrusion extending along the axial direction of the front support 122; the first rear positioning post 1224 is coaxially disposed with the front support 122. Furthermore, the first rear positioning post 1224 and the front support 122 are either an integral structure or a separate structure. In this embodiment, they are preferably an integral structure, that is, the front support 122 includes the first rear positioning post 1224 and the front support reset part 1226.

[0104] In another embodiment of the first rear positioning post 1224, the first rear positioning post 1224 is a main reset member shaft with one end inserted into the front support 122. The main reset member shaft needs to have a certain outer diameter so that the main reset member 140 can be reliably positioned in the working position by being sleeved on the first rear positioning post 1224.

[0105] In another embodiment of the main reset member 140, the main reset member 140 is a tension spring, one end of which is connected to the front support 122 and the other end of which is connected to the housing 90.

[0106] In another embodiment of the main reset member 140, the main reset member 140 acts on the rear support 132. For example, the main reset member 140 is a tension spring, with one end connected to the rear support 132 and the other end connected to the housing 90.

[0107] Furthermore, the first gear 1223 is a sector gear, which includes multiple gears arranged on the circumferential side of the front support body 1221 along the rotation direction of the front support 122. Of course, the first gear 1223 can also be a full gear.

[0108] Furthermore, the front support 122 also includes a front support shaft hole, through which the front support 122 is rotatably sleeved on a corresponding rotating shaft, the two ends of which are respectively fixed to the housing 90. Alternatively, the front support 122 may also include a rotating shaft integrally formed therewith, the two ends of which are rotatably mounted on the housing 90.

[0109] like Figure 10As shown, the front movable contact 121 includes a front movable contact 1211 and a front movable contact plate 1212. The front movable contact plate 1212 includes a front movable contact plate bearing section 1213, a front movable contact plate connecting section 1214, a front movable contact plate mounting section 1215, and a front movable contact plate limiting part 1216 connected in sequence. The front movable contact 1211 is disposed on the front movable contact plate bearing section 1213. The front movable contact plate mounting section 1215 is provided with a front movable contact plate mounting hole 1217. One end of the front movable contact plate limiting part 1216 is bent and connected to the front movable contact plate mounting section 1215 and protrudes along the axial direction of the front movable contact plate mounting hole 1217. The front movable contact plate connecting section 1214 is also used to electrically connect to the first terminal 810 through the first flexible connection 850. Furthermore, the front movable contact plate connecting section 1214 is provided with a front movable contact plate connecting protrusion 1218, which is welded to the first flexible connection 850 to ensure the accuracy of the welding position between the front movable contact 121 and the first flexible connection 850.

[0110] like Figure 12-13 The image shows one embodiment of the rear moving contact assembly 130.

[0111] like Figure 12 As shown in sub-figure (1), the rear moving contact assembly 130 includes a rear moving contact 131, a rear support 132, and a rear contact spring 133. The rear moving contact assembly 130 is rotatably mounted on the rear support 132 (specifically, it is rotatably mounted on the housing 90). One end of the rear moving contact 131 is mounted on the rear support 132 and is rotatably mounted relative to the rear support 132. The rear contact spring 133 acts on the rear moving contact 131 and the rear support 132 respectively to keep them in a limiting fit and relatively stationary. When the rear moving contact 131 is closed with the rear stationary contact 156, the rear moving contact 131 rotates relative to the rear support 132 to store energy in the rear contact spring 133. The force applied by the rear contact spring 133 to the rear moving contact 131 causes the rear moving contact 131 to press the rear stationary contact 156, so that the rear moving contact 131 and the rear stationary contact 156 are reliably closed. Furthermore, one axial end of the rear support 132 is the rear support mounting end, and the rear moving contact 131 and the rear contact spring 133 are disposed on the rear support mounting end.

[0112] Specifically, such as Figure 12As shown in sub-figure (1), the operating device further includes a second mounting post 1322 disposed on the rear support mounting end, the rear support 132 including a rear support limiting part 1324 disposed on the rear support mounting end; the rear contact spring 133 is a torsion spring; the rear moving contact 131 includes a rear moving contact plate mounting section 1315 and a rear moving contact plate limiting part 1316 disposed at one end thereof, the rear moving contact plate mounting section 1315 is provided with a rear moving contact plate mounting hole 1317, the rear moving contact 131... 31 is rotatably sleeved on the second mounting post 1322 through the rear movable contact plate mounting hole 1317. The rear contact spring 133 is sleeved on the second mounting post 1322. One spring arm cooperates with the rear movable contact plate limiting part 1316 and the other spring arm cooperates with the rear support limiting part 1324, so that the rear movable contact plate limiting part 1316 and the rear support limiting part 1324 abut and limit each other. The rear movable contact plate limiting part 1316 and the rear support limiting part 1324 are located between the two spring arms. Furthermore, the rear support 132 also includes a rear support body 1321, which is rotatably mounted via the rear support body 1321. One axial end of the rear support body 1321 is the rear support mounting end, and one end of the rear movable contact 131 and the rear contact spring 133 are mounted on the front support mounting end. The second mounting post 1322 is coaxially mounted with the rear support body 1321, that is, the rotation axes of the rear movable contact 131 and the rear support 132 coincide. The rear support limiting part 1324 is a protrusion that protrudes along the axial direction of the rear support 132. One end of the rear movable contact plate limiting part 1316 is bent and connected to the rear movable contact plate mounting section 1315, and the other end of the rear movable contact plate limiting part 1316 extends away from the rear support body 1321 relative to the rear movable contact plate mounting section 1315. Furthermore, the second mounting post 1322 and the rear support 132 are either an integral structure or a separate structure. In this embodiment, they are preferably an integral structure, in which case the rear support 132 includes the second mounting post 1322 and the rear support limiting part 1324.

[0113] As another embodiment of the second mounting post 1322, the second mounting post 1322 is a rear moving contact mounting shaft with one end inserted into the rear support 132. The rear moving contact mounting shaft needs to have a certain outer diameter, and a rear contact spring 133 is sleeved on it and reliably positioned in the working position.

[0114] Furthermore, the second gear 1323 is a sector gear, which includes multiple gears arranged on the circumferential side of the rear support body 1321 along the rotation direction of the rear support 132. Of course, the second gear 1323 can also be a full gear.

[0115] Furthermore, the rear support 132 also includes a rear support shaft hole, through which the rear support 132 is rotatably sleeved on a corresponding rotating shaft, the two ends of which are respectively fixed to the housing 90. Alternatively, the rear support 132 includes a rotating shaft integrally formed therewith, the two ends of which are rotatably mounted on the housing 90.

[0116] like Figure 12 As shown in sub-figure (2), the other axial end of the rear support 132 is the rear support bearing end (that is, the end of the rear support 132 opposite to the rear support mounting end along the axial direction of the rear support 132), that is, the two axial ends of the rear support 132 are the rear support mounting end and the rear support bearing end respectively; the jump fastener 203 and the locking fastener 204 of the operating mechanism 200 are both set on the rear support bearing end.

[0117] The jump fastener, locking fastener, and locking fastener spring are mounted on the rear support bearing end, while the rear moving contact and rear contact spring are mounted on the rear support mounting end. This arrangement keeps the jump fastener, locking fastener, and locking spring away from the rear moving contact and rear contact spring, simplifying the structure of the rear support and facilitating the assembly of each component. It also helps to increase the insulation distance and creepage clearance between the operating mechanism and the rear moving contact, ensuring the personal safety of the operator.

[0118] Specifically, such as Figure 12 As shown in sub-figure (2), the jump fastener 203 is engaged with the rear support 132 at both the jump fastener latching position and the jump fastener disengaging position. That is, the jump fastener 203 is engaged with the rear support 132 at both ends of its rotation stroke, thereby limiting the rotation stroke of the jump fastener 203. Further, the rear support 132 also includes a jump fastener shaft 1325 and a jump fastener stop 1326 disposed on the rear support bearing end. The jump fastener stop 1326 and the jump fastener shaft 1325 are arranged radially spaced apart. The jump fastener 203 of the operating mechanism 200 includes a jump fastener mounting hole 2033. The jump fastener 203 is rotatably sleeved on the jump fastener shaft 1325 through the jump fastener mounting hole 2033. The jump fastener 203 is engaged with the jump fastener stop 1326 at both the jump fastener latching position and the jump fastener disengaging position. The jump fastener stop 1326 preferably includes two stop limiting surfaces arranged around the rotation direction of the jump fastener 203. When the jump fastener 203 is in the buckled position, it is abutted and limited by one stop limiting surface, and when the jump fastener 203 is in the unbuckled position, it is limited by the other stop limiting surface.

[0119] Specifically, such as Figure 20As shown, the jump fastener 203 also includes a jump fastener body 2031, which is a triangular plate structure. The jump fastener body 2031 includes a jump fastener mounting hole 2033, a jump fastener connecting hole 2034, and a jump fastener latching part 2032. The jump fastener mounting hole 2033, the jump fastener connecting hole 2034, and the jump fastener latching part 2032 are respectively located at the three vertices of the triangular plate structure. The jump fastener connecting hole 2034 is used for one end of the connecting rod 202 of the operating mechanism 200 to be rotatably inserted therein. The jump fastener latching part 2032 is used to latch and cooperate with the locking fastener 204 (specifically, the jump fastener latching part 2032 latches and cooperates with the locking fastener latching part 2048 of the second arm 2044 of the locking fastener 204, for example, the jump fastener latching part 2032 rests on the locking fastener latching part 2048).

[0120] Specifically, such as Figure 12 As shown in sub-figure (2), the locking element 204 coincides with the rotation axis of the rear support 132, that is, the locking element 204 and the rear support 132 are coaxially arranged. Furthermore, the locking element 204 and the rear support 132 share a rotation axis, that is, the locking element 204 is rotatably arranged through the rotation axis of the rear support 132.

[0121] Specifically, such as Figure 1-4 As shown in Figures 7, 17, and 19, the locking member 204 includes a locking member mounting part 2041, a locking member first arm 2043, and a locking member second arm 2044. The locking member 204 is rotatably mounted through the locking member mounting part 2041 (specifically, the locking member mounting part 2041 is provided with a locking member mounting hole 2047, and the locking member 204 is rotatably sleeved on the rotating shaft of the rear support 132 through the locking member mounting hole 2047). The locking member first arm 2043 and the locking member second arm 2044 are arranged sequentially along the rotation direction of the locking member 204, and one end of each is connected to the locking member mounting part 2041. The first arm 2043 of the locking member is used to bear the driving force from the short-circuit protection mechanism of the thermomagnetic tripping device 700 to drive the locking member 204 to rotate so that the locking member 204 and the tripping member 203 are released from the latching engagement, thereby disengaging the operating mechanism 200; that is, when a short-circuit fault occurs in the circuit where the circuit breaker of this embodiment is located, the short-circuit protection mechanism drives the locking member 204 to rotate through the first arm 2043 of the locking member so that the locking member 204 and the tripping member 203 are released from the latching engagement. The second arm 2044 of the locking member is used to engage with the trip fastener 203 and to bear the driving force from the overload protection mechanism of the thermomagnetic tripping device 700 to drive the locking member 204 to rotate so that the locking member 204 and the trip fastener 203 are released from the engagement, thereby disengaging the operating mechanism 200. That is, when an overload fault occurs in the circuit where the circuit breaker of this embodiment is located, the overload protection mechanism drives the locking member 204 to rotate through the second arm 2044 of the locking member so that the locking member 204 and the trip fastener 203 are released from the engagement.

[0122] Furthermore, the second arm 2044 of the locking member is provided with a locking member latching part 2048 in the middle, which latches and engages with the latching part 2032 of the jump fastener 203.

[0123] Furthermore, the locking member 204 also includes a locking member driven post 2045 disposed on the other end of the second arm 2044 of the locking member, and the locking member driven post 2045 is in transmission cooperation with the bimetallic strip 740 of the overload protection mechanism.

[0124] Specifically, the driven post 2045 of the locking component is driven by the transmission component 205 of the thermomagnetic release device 700, which will be described in detail later.

[0125] Furthermore, the locking spring 207 is a torsion spring; the locking member 204 is sleeved on the rotation axis of the locking member 204, one spring arm cooperates with the second arm 2044 of the locking member and the other spring arm cooperates with the rear support 132. Furthermore, the second arm 2044 of the locking member has a locking spring limiting part 2046 in the middle; the rear support 132 also includes a locking member stop 1327 disposed on the rear support bearing end; one spring arm of the locking spring 207 cooperates with the locking spring limiting part 2046, and the other spring arm cooperates with the locking member stop 1327; in the rotation direction of the locking member 204, the two spring arms of the locking spring 207 are preferably located between the locking spring limiting part 2046 and the locking member stop 1327; the locking spring limiting part 2046 and the locking member driven post 2045 are respectively disposed on both sides of the second arm 2044 of the locking member along direction d2. Furthermore, the locking member 204 also includes a locking member limiting part 2042 disposed on the locking member mounting part 2041. The locking member limiting part 2042 is used to limit and cooperate with the locking member stop part 1327. Specifically, after the operating mechanism 200 is disengaged, the locking member spring 207 drives the locking member 204 to rotate so that the locking member limiting part 2042 abuts and limits the cooperation with the locking member stop part 1327. In the rotation direction of the locking member 204, the locking member limiting part 2042, the locking member second arm 2044 and the locking member first arm 2043 are arranged in sequence, and the locking member first arm 2043, the locking member second arm 2044, the locking member stop part 1327 and the locking member limiting part 2042 are arranged in sequence.

[0126] like Figure 13As shown, the rear movable contact 131 includes a rear movable contact 1311 and a rear movable contact plate 1312. The rear movable contact plate 1312 includes a rear movable contact plate bearing section 1313, a rear movable contact plate connecting section 1314, a rear movable contact plate mounting section 1315, and a rear movable contact plate limiting part 1316 connected in sequence. The rear movable contact 1311 is disposed on the rear movable contact plate bearing section 1313. The rear movable contact plate mounting section 1315 is provided with a rear movable contact plate mounting hole 1317. One end of the rear movable contact plate limiting part 1316 is bent and connected to the rear movable contact plate mounting section 1315 and protrudes along the axial direction of the rear movable contact plate mounting hole 1317. The rear movable contact plate connecting section 1314 is also used to electrically connect to the second terminal 820 through the second flexible connection 860. Furthermore, the rear movable contact plate connecting section 1314 is provided with a rear movable contact plate connecting protrusion 1318, which is welded to the second flexible connection 860 to ensure the accuracy of the welding position between the rear movable contact 131 and the second flexible connection 860.

[0127] like Figure 2-7 As shown in Figures 15-16, one embodiment of the stationary contact structure 150 is presented.

[0128] The stationary contact structure 150 includes a front stationary contact 155, a rear stationary contact 156, and a conductive beam 153. The front stationary contact 155 includes a front support plate 1531 and a front stationary contact 151. The front support plate 1531 includes a front support main plate 15311 with the front stationary contact 151 on one side, meaning the front stationary contact 151 is located on one side of the front support main plate 15311. The rear stationary contact 156 includes a rear support plate 1532 and a rear stationary contact 152. The rear support plate 1532 includes a rear support main plate 15321 with the rear stationary contact 152 on one side, meaning the rear stationary contact 152 is located on one side of the rear support main plate 15321. The conductive beam 153 extends along direction d1. The front stationary contact 151 and the rear stationary contact 152 are staggered in direction d2, and their projection directions in the stationary contact structure 150, the operating system, and the contact system 100 are respectively in direction d. In the orthogonal projection of 3, the front stationary contact 151 and the rear stationary contact 152 are staggered along direction d2. In the orthogonal projection of the stationary contact structure 150 and the operating system with direction d1, the front stationary contact 151 and the rear stationary contact 152 are staggered along direction d2. In the orthogonal projection of the stationary contact structure 150, the operating system and the contact system 100 with direction d2, the front stationary contact 151 and the rear stationary contact 152 are opposite to each other along direction d1. The front bearing main board 15311 and the rear bearing main board 15321 are opposite to each other along direction d1 (they are not completely opposite to each other in direction d1, but partially opposite). The front bearing main board 15311 and the rear bearing main board 15321 are located on the same side of the conductive beam 153 in direction d3, so that the front stationary contact 151 and the rear stationary contact 152 are located on the same side of the conductive beam 153 in direction d3.

[0129] Furthermore, in the direction d2, a front clearance notch is provided on one side of the rear support plate 1532 and the conductive beam 153; the front clearance notch is arranged side by side with the front support plate 1531 in the direction d1, and is used to avoid the swinging front moving contact 121 that cooperates with the front stationary contact 155; that is, the swinging plane of the front moving contact 121 is arranged side by side with the rear support plate 1532 and the conductive beam 153 in the direction d2, and the swinging path of the front moving contact 121 overlaps with the rear support plate 1532 and the conductive beam 153 on the orthogonal projection of the contact system 100 and the operating system in the direction d2, respectively; in the direction d2, a rear clearance notch is provided on one side of the front support plate 1531 and the conductive beam 153; the rear clearance notch is arranged side by side with the support plate 1532 in the direction d1, and is used to avoid the swinging front moving contact 121. A rear movable contact 131 is dynamically configured and cooperates with the rear stationary contact 156; that is, the swing plane of the rear movable contact 131 is arranged side by side with the front support plate 1531 and the conductive beam 153 along direction d2, respectively on the orthogonal projection of the contact system 100 and the operating system with direction d2, and the swing path of the rear movable contact 131 overlaps with the front support plate 1531 and the conductive beam 153; the front clearance notch and the rear clearance notch are located on both sides of the conductive beam 153 in direction d2; that is, the front clearance notch, the conductive beam 153 and the rear clearance notch are arranged sequentially along direction d2, respectively on the orthogonal projection of the stationary contact structure 150, the contact system 100 and the operating system with direction d2, and one end of the front clearance notch and the rear clearance notch overlaps and overlaps with the conductive beam 153.

[0130] Specifically, such as Figure 2-7 As shown, one end of the front moving contact 121 with the front moving contact point 1211 passes through the front clearance notch and is arranged side by side with the front stationary contact 155 along direction d1; one end of the rear moving contact 131 with the rear moving contact point 1311 passes through the rear clearance notch and is arranged side by side with the rear stationary contact 156 along direction d1. Figure 15-16 As shown, the side edges of the rearward clearance notch of the front bearing plate 1531 and the conductive crossbeam 153 are flush; the side edges of the frontward clearance notch of the rear bearing plate 1532 and the conductive crossbeam 153 are flush. The above structural design helps to reduce the space required for the stationary contact structure 150. When applied to circuit breakers, it also helps to reduce the size of the circuit breaker in the direction d2.

[0131] Specifically, such as Figure 15-16As shown, the front support plate 1531 further includes a front support connecting plate 15312 that is bent and connected to the front support main plate 15311; the rear support plate 1532 further includes a rear support connecting plate 15322 that is bent and connected to the rear support main plate 15321; the front support connecting plate 15312, the conductive crossbeam 153 and the rear support connecting plate 15322 are connected in sequence and form a Z-shaped structure. The front support connecting plate 15312 and the rear support connecting plate 15322 are parallel to each other. The conductive crossbeam 153 is perpendicularly connected to the front support connecting plate 15312 and the rear support connecting plate 15322 respectively. That is, one end of the front support connecting plate 15312 is perpendicularly connected to one end of the conductive crossbeam 153, and one end of the rear support connecting plate 15322 is perpendicularly connected to one end of the conductive crossbeam 153. The other ends of the front support connecting plate 15312 and the rear support connecting plate 15322 extend along the direction d2 to both sides of the conductive crossbeam 153 respectively.

[0132] It should be noted that the front bearing plate 1531 may not be provided with a front bearing connecting plate 15312, and the rear bearing plate 1532 may not be provided with a rear bearing connecting plate 15322. One end of the front bearing main plate 15311 and the rear bearing main plate 15321 are respectively directly bent and connected to both ends of the conductive crossbeam 153.

[0133] Specifically, such as Figure 2-7 As shown in Figures 15-16, the end of the front bearing main board 15311 connected to the front bearing connecting plate 15312 (i.e., the end of the front bearing main board 15311 connected to the conductive crossbeam 153) is the first upper end, and the other end is the first lower end; the end of the rear bearing main board 15321 connected to the rear bearing connecting plate 15322 (i.e., the end of the rear bearing main board 15321 connected to the conductive crossbeam 153) is the second upper end, and the other end is the second lower end; in the direction d2, the distance between the first upper end and the second upper end is less than the distance between the first lower end and the second lower end, that is, the first lower end is inclined away from the rear bearing main board 15321 relative to the first upper end, and the second lower end is inclined away from the front bearing main board 15311 relative to the second upper end. It should be noted that the setting angle of the front bearing main board 15311 and the rear bearing main board 15321 can be adjusted according to actual needs.

[0134] Furthermore, the front stationary contact 151 is located between the first upper end and the first lower end, and is positioned closer to the first upper end relative to the first lower end; the rear stationary contact 152 is located between the second upper end and the second lower end, and is positioned closer to the second upper end relative to the second lower end. It should be noted that the positions of the front stationary contact 151 and the rear stationary contact 152 on the front bearing motherboard 15311 and the rear bearing motherboard 15321, respectively, can be adjusted according to actual needs.

[0135] Furthermore, on the orthogonal projection of the stationary contact structure 150, the operating system, and the contact system 100 in the direction d2, the front bearing main board 15311 and the rear bearing main board 15321 respectively form two sides of an isosceles trapezoid. The front bearing connecting plate 15312, the conductive crossbeam 153, and the rear bearing main board 15321 are connected in sequence to form the upper base of the isosceles trapezoid as a whole.

[0136] Specifically, such as Figure 15-16 As shown, the front stationary contact 151 and the front support plate 1531 are separate structures but welded together. The front support plate 15311 has a front welding area 15313, and the front stationary contact 151 is welded within the front welding area 15313. The rear stationary contact 152 and the rear support plate 1532 are separate structures but welded together. The rear support plate 15321 has a rear welding area 15323, and the rear stationary contact 152 is welded within the rear welding area 15323. Preferably, the front welding area 15313 and the rear welding area 15323 are respectively provided as position marks on the front support plate 15311 and the rear support plate 15321, ensuring that the front stationary contact 151 and the rear stationary contact 152 are welded in accurate positions, thereby ensuring the consistency of the stationary contact structure 150 product. Furthermore, the front stationary contact 151 and the rear stationary contact 152 are silver-plated contacts or contacts coated with a silver graphene layer.

[0137] Specifically, such as Figure 15-16As shown, the front support plate 1531, the conductive crossbeam 153, and the rear support plate 1532 are an integral structure. Furthermore, the front support plate 1531, the conductive crossbeam 153, and the rear support plate 1532 are connected end-to-end along direction d1. Furthermore, the front support plate 1531, the conductive crossbeam 153, and the rear support plate 1532 together form a static contact bridge 154. Furthermore, the static contact bridge 154 is formed by cutting and bending metal sheet; after the static contact bridge 154 is unfolded, the front support plate 1531, the conductive crossbeam 153, and the rear support plate 1532 are coplanar and form a Z-shaped structure. Both the front support plate 1531 and the rear support plate 1532 are rectangular plate structures. One apex of the front support plate 1531 and one apex of the rear support plate 1532 are respectively connected at right angles to both ends of the conductive crossbeam 153; both the front support plate 1531 and the rear support plate 1532 include a pair of relatively parallel first side edges and... A pair of second side edges arranged in parallel; the conductive beam 153 includes a pair of third side edges arranged in parallel; on the plane where the static contact bridge 154 is unfolded, a first side edge of the front support plate 1531 and the rear support plate 1532 are respectively connected to both ends of the conductive beam 153, a second side edge of the front support plate 1531 and the rear support plate 1532 are respectively flush with the two third side edges of the conductive beam 153, and the other second side edge of the front support plate 1531 and the rear support plate 1532 are respectively located on both sides of the conductive beam 153.

[0138] In another embodiment of the static contact bridge 154, the front support plate 1531, the conductive crossbeam 153, and the rear support plate 1532 are separate structures. The conductive crossbeam 153 can be made of a conductor independent of the front support plate 1531 and the rear support plate 1532. The conductive crossbeam 153 can be welded to the front support plate 1531 and the rear support plate 1532 respectively, or connected together by other existing technical means—such as riveting. Furthermore, the conductive crossbeam 153 is implemented by a flexible connection or other types of metal conductors.

[0139] In another embodiment of the static contact bridge 154, the front support plate 1531 and the rear support plate 1532 are respectively connected to the two ends of the conductive beam 153 in a staggered manner, and the front support plate 1531 and the rear support plate 1532 are respectively located on both sides of the conductive beam 153 in the direction d2; in the unfolded shape of the contact bridge 154, the front support plate 1531, the conductive beam 153 and the rear support plate 1532 are coplanar, and the front support plate 1531, the conductive beam 153 and the rear support plate 1532 are all rectangular plate structures and are distributed in a stepped manner.

[0140] Specifically, such as Figure 7As shown, on the orthogonal projection of the stationary contact structure 150, the contact system 100, and the operating system, respectively, the front stationary contact 155 and the rear stationary contact 156 are symmetrical structures.

[0141] Specifically, such as Figure 15-16 As shown, the front support plate 1531 and the rear support plate 1532 have the same width in direction d2 and are greater than the width of the conductive beam 153 in direction d2. On the orthogonal projection of the contact system 100 and the operating system in direction d1, the ends of the front support plate 1531 and the rear support plate 1532 that are close to each other coincide with the conductive beam 153, and the other ends of the front support plate 1531 and the rear support plate 1532 are located on both sides of the conductive beam 153.

[0142] Specifically, such as Figure 15-16 As shown, the stationary contact structure 150 is a centrally symmetrical structure, with its central axis of symmetry parallel to direction d3 and passing through the conductive crossbeam 153. The stationary contact bridge 154 is a centrally symmetrical structure, with its central axis of symmetry being the same as that of the stationary contact structure 150. In the unfolded structure of the front support plate 1531, the conductive crossbeam 153, and the rear support plate 1532 (that is, the unfolded structure of the stationary contact bridge 154), the front support plate 1531 and the rear support plate 1532 are rectangular plate structures with the same structural dimensions, and the conductive crossbeam 153 is a rectangular plate structure; one end of the front support plate 1531 and the rear support plate 1532 in direction d2 are respectively connected to both ends of the conductive crossbeam 153, and the other end of the front support plate 1531 and the rear support plate 1532 in direction d2 protrudes and is respectively disposed on both sides of the conductive crossbeam 153.

[0143] like Figure 1-3 Figures 5, 22-29 show one embodiment of the arc extinguishing system 300.

[0144] The arc-extinguishing system 300 includes a front arc-extinguishing chamber 510 and a rear arc-extinguishing chamber 520 arranged side-by-side and spaced apart along direction d2. Both the front arc-extinguishing chamber 510 and the rear arc-extinguishing chamber 520 include multiple arc-extinguishing grid plates 530 arranged side-by-side and spaced apart along direction d1. That is, in the arc-extinguishing system 300, the front arc-extinguishing chamber 510 and the rear arc-extinguishing chamber 520 are arranged side-by-side and spaced apart along direction d2. The front arc-extinguishing chamber 510 includes multiple arc-extinguishing grid plates 530 arranged side-by-side and spaced apart along direction d1, and the rear arc-extinguishing chamber 520 also includes multiple arc-extinguishing grid plates 530 arranged side-by-side and spaced apart along direction d1. The front arc-extinguishing chamber 510... The 0 is used to cooperate with the front moving contact 121 and the front stationary contact 155 to extinguish the arc generated by the front moving contact 121 and the front stationary contact 155. The first disconnection interval formed between the front moving contact 121 and the front stationary contact 155 is disposed opposite to the arc inlet end of the front arc extinguishing chamber 510 along direction d3. The rear arc extinguishing chamber 520 is used to cooperate with the rear moving contact 131 and the rear stationary contact 156 to extinguish the arc generated by the rear moving contact 131 and the rear stationary contact 156. The second disconnection interval formed between the rear moving contact 131 and the rear stationary contact 156 is disposed opposite to the rear arc extinguishing chamber. The arc inlet ends of 520 are arranged opposite each other along direction d3; in said direction d3, a front contact region 4952 is formed between the conductive beam 153 of the stationary contact structure 150 and the arc inlet end of the front arc-extinguishing chamber 510. The front contact region 4952 is used for the front moving contact 1211 of the front moving contact 121 and the front stationary contact 151 of the front stationary contact 155 to close and open therein, that is, the front moving contact 1211 and the front stationary contact 151 are located between the conductive beam 153 and the arc inlet end of the front arc-extinguishing chamber 510 in direction d3, and the front moving contact 1211 is located in the front contact region 4952. The moving contact 1311 of the moving contact 131 and the arc inlet end of the rear arc-extinguishing chamber 520 are connected and disconnected within the moving contact 1311. The moving contact 1311 and the arc inlet end of the rear arc-extinguishing chamber 520 are connected and disconnected within the moving contact 1311. That is, the moving contact 1311 and the arc inlet end of the rear arc-extinguishing chamber 52 are located in the direction d3 between the moving contact 153 and the arc inlet end of the rear arc-extinguishing chamber 52. The moving contact 1311 moves within the rear contact area 4962 and connects and disconnects with the rear arc-extinguishing contact 156.

[0145] The front arc-extinguishing chamber 510 is used to extinguish the arc generated by the front moving contact 121 and the front stationary contact 155, and the rear arc-extinguishing chamber 520 is used to extinguish the arc generated by the rear moving contact 131 and the rear stationary contact 156, thereby improving the breaking capacity of the contact system 100 and improving the arc-extinguishing efficiency.

[0146] Specifically, both the front arc-extinguishing chamber 510 and the rear arc-extinguishing chamber 520 include two sets of arc-extinguishing baffles arranged opposite each other along direction d2 and multiple arc-extinguishing grid plates 530 arranged side by side and spaced apart along direction d1. The two ends of each arc-extinguishing grid plate 530 in direction d2 are fixedly connected to the corresponding two sets of arc-extinguishing baffles. The two ends of the front arc-extinguishing chamber 510 in direction d3 are, respectively, an arc inlet end that cooperates with the front moving contact 121 and the front stationary contact 155, and an exhaust end for venting exhaust to the external environment. Similarly, the two ends of the rear arc-extinguishing chamber 520 in direction d3 are, respectively, an arc inlet end that cooperates with the rear moving contact 131 and the rear stationary contact 156, and an exhaust end for venting exhaust to the external environment. The front arc-extinguishing chamber 510 and the rear arc-extinguishing chamber 520 have the same dimensions in directions d1, d2, and d3, respectively. This reduces the number of molds required and lowers mold-making costs. Furthermore, it allows the front and rear arc-extinguishing chambers 510 and 520 to accommodate as many arc-extinguishing grid plates 530 as possible within a limited space, thereby improving arc-extinguishing capability. It should be noted that the dimensions of the front and rear arc-extinguishing chambers 510 and / or d2 and / or d3 can also be designed differently according to actual needs.

[0147] Furthermore, such as Figure 1-3As shown in Figures 22 and 25, the arc extinguishing system 300 further includes an arc-starting plate structure. The arc-starting plate structure includes a first arc-starting plate 610, a second arc-starting plate 620, a third arc-starting plate 630, and a fourth arc-starting plate 640, which are respectively used to cooperate with the front moving contact 121, the rear moving contact 131, the front stationary contact 155, and the rear stationary contact 156. That is, the first arc-starting plate 610 cooperates with the front moving contact 121, the second arc-starting plate 620 cooperates with the rear moving contact 131, the third arc-starting plate 630 cooperates with the front stationary contact 155, and the fourth arc-starting plate 640 cooperates with the rear stationary contact 156; the first arc-starting plate 610 and the third arc-starting plate 630... The first and third arc-initiating plates 610 and 630 are spaced apart relative to each other along direction d1 and are arranged side-by-side with the fourth arc-initiating plate 640 along direction d2. Similarly, the second and fourth arc-initiating plates 620 and 630 are spaced apart relative to each other along direction d1 and are arranged side-by-side with the third arc-initiating plate 630 along direction d2. Furthermore, the end of the first arc-starting plate 610 that mates with the front moving contact 121 is also used to be electrically connected to the first terminal 810, so as to achieve equipotentiality between the first arc-starting plate 610 and the front moving contact 121, thereby facilitating the rapid transfer of the arc from the front moving contact 121 to the first arc-starting plate 610, and avoiding or significantly reducing the burn damage of the arc to the front moving contact 121; the end of the second arc-starting plate 620 that mates with the rear moving contact 131 is also used to be electrically connected to the second terminal 820, so as to achieve equipotentiality between the second arc-starting plate 620 and the rear moving contact 131, thereby facilitating the rapid transfer of the arc from the rear moving contact 131 to the second arc-starting plate 620, and avoiding or significantly reducing the burn damage of the arc to the rear moving contact 131.

[0148] Specifically, such as Figure 1-3As shown in Figures 22-23 and 25-26, one end of the first arc-starting plate 610 and one end of the third arc-starting plate 630 are respectively located on both sides of the front arc-extinguishing chamber 510 in direction d1 and are spaced apart from the corresponding arc-extinguishing grid plates 530; one end of the second arc-starting plate 620 and one end of the fourth arc-starting plate 640 are respectively located on both sides of the rear arc-extinguishing chamber 520 in direction d1 and are spaced apart from the corresponding arc-extinguishing grid plates 530; the first arc-starting plate 610, the second arc-starting plate 620, the third arc-starting plate 630 and the fourth arc-starting plate 640 are respectively located on both sides of the rear arc-extinguishing chamber 520 in direction d1 and are spaced apart from the corresponding arc-extinguishing grid plates 530; The other end of the arc plate 640 protrudes in direction d3 on one side of the arc inlet end of the arc extinguishing system 300. That is, the other ends of the first arc-initiating plate 610 and the third arc-initiating plate 630 protrude in direction d3 on one side of the arc inlet end of the front arc extinguishing chamber 510 and are located on both sides of the front contact area 4952 in direction d1. The other ends of the second arc-initiating plate 620 and the fourth arc-initiating plate 640 protrude in direction d3 on one side of the arc inlet end of the rear arc extinguishing chamber 520 and are located on both sides of the rear contact area 4962 in direction d1. Furthermore, one end of the first arc-starting plate 610 is located on one side of the front arc-extinguishing chamber 510 in direction d1, and the other end is opposite to the front moving contact 121 located in the disconnected position in direction d1, with a small gap or abutment between them; one end of the third arc-starting plate 630 is located on the other side of the front arc-extinguishing chamber 510 in direction d1, and the other end is connected to the front bearing plate 1531 of the front stationary contact 155 and has a small gap between it and the front stationary contact 151 (or abuts against the front stationary contact 151), thereby facilitating the rapid transfer of the arc from the front stationary contact 155 to the third arc-starting plate 630, avoiding or significantly reducing the impact of the arc on the front stationary contact. The second arc-starting plate 620 has one end located on one side of the rear arc-extinguishing chamber 520 in direction d1, and the other end is engaged with the rear moving contact 131 located in the disconnected position in direction d1, with a small gap or abutment between them; the fourth arc-starting plate 640 has one end located on the other side of the rear arc-extinguishing chamber 520 in direction d1, and the other end is connected to the rear bearing plate 1532 and has a small gap (or abutment with the rear stationary contact 152) between it and the rear stationary contact 152, which facilitates the rapid transfer of the arc from the rear stationary contact 156 to the fourth arc-starting plate 640, avoiding or significantly reducing the arc burn-out of the rear stationary contact 156.

[0149] Furthermore, such as Figure 1 , 22As shown in Figure 29, the arc-extinguishing system 300 further includes an insulating isolation structure 400. The front stationary contact 155 and the rear stationary contact 156 are located on opposite sides of the isolation structure 400 in direction d2. The front arc-extinguishing chamber 510 and the rear arc-extinguishing chamber 520 are located on opposite sides of the isolation structure 400 in direction d2. The conductive beam 153 is enclosed within the isolation structure 400. The front clearance notch and the rear clearance notch are located on opposite sides of the isolation structure 400 in direction d2. The isolation structure 400 also serves to separate the front moving contact 121 and the rear moving contact 131. The ends that mate with the front stationary contact 155 and the rear stationary contact 156, that is, the ends of the front moving contact 121 and the rear moving contact 131 that mate with the front stationary contact 155 and the rear stationary contact 156 respectively, i.e., the end of the front moving contact 121 that mates with the front stationary contact 155 and the end of the rear moving contact 131 that mates with the rear stationary contact 156 (in other words, the end of the front moving contact 121 with the front moving contact 1211 and the end of the rear moving contact 131 with the rear moving contact 1311), are located on both sides of the isolation structure 400 in the direction d2. The isolation structure 400 ensures that the arc generated by the front moving contact 121 and the front stationary contact 155 is extinguished by the front arc-extinguishing chamber 510 and the arc generated by the rear moving contact 131 and the rear stationary contact 156 is extinguished by the rear arc-extinguishing chamber 520, preventing short circuits at the two arcs and improving the arc-extinguishing efficiency and effect.

[0150] Specifically, such as Figure 22 and 24As shown, the isolation structure 400 includes a partition plate 490 and a front chamber 420 and a rear chamber 460 arranged side-by-side and spaced apart on both sides of the partition plate 490 along direction d2. The front chamber 420 includes a front inlet 4951, a front contact area 4952, a front mounting area 4953 for installing the front arc-extinguishing chamber 510 (i.e., the front arc-extinguishing chamber 510 is located in the front mounting area 4953), and a front outlet 4954 opposite to the exhaust end of the front arc-extinguishing chamber 510. The front contact area 4952 has a front stationary contact position 493 (i.e., the front stationary contact 155 is located in the front stationary contact position 493) and a front moving contact position at both ends in direction d1 for installing the stationary contact 155. The front inlet 4951 is used for the connection between the front moving contact 121 and the front stationary contact 155. One end of the contact 121 passes through and inserts into the front contact area 4952 to close and open with the front stationary contact 155. The front moving contact position is used to accommodate the front moving contact 121 that has swung to the open position (specifically, the front moving contact position is used to accommodate the end of the front moving contact 121 that has swung to the open position). That is, the end of the front moving contact 121 that mates with the front stationary contact 155 is the front contact end. The front contact end passes through the front inlet 4951 and enters the front contact area 4952. The front moving contact 121 swings and drives the front contact end to move within the front contact area 4952 to close and open with the front stationary contact 155. The front moving contact position is used to accommodate the front contact end. The rear chamber 460 includes a rear inlet 4961, a rear contact area 4962, a rear mounting area 4963 for installing the rear arc-extinguishing chamber 520 (i.e., the rear arc-extinguishing chamber 520 is located within the rear mounting area 4963), and a rear outlet 4964 opposite to the exhaust end of the rear arc-extinguishing chamber 520, arranged sequentially and in communication along direction d3. The rear contact area 4962 has a rear stationary contact position 494 and a rear moving contact position (i.e., the rear stationary contact 156 is located within the rear stationary contact position 494) at its two ends along direction d1. The rear inlet 4961 is used for supplying the rear... The end of the moving contact 131 that mates with the rear stationary contact 156 is inserted into the rear contact area 4962. The rear moving contact position is used to accommodate the rear moving contact 131 when it swings to the open position (specifically, the rear moving contact position is used to accommodate the end of the rear moving contact 131 when it swings to the open position). That is, the end of the rear moving contact 131 that mates with the rear stationary contact 156 is the rear contact end. The rear contact end passes through the rear inlet 4961 and is inserted into the rear contact area 4962. The rear moving contact 131 swings and drives the rear contact end to move, so as to close and open with the rear stationary contact 156. The rear moving contact position is used to accommodate the rear contact end.

[0151] The isolation structure 400 allows for pre-assembly of the front stationary contact 155, the rear stationary contact 156, the front arc-extinguishing chamber 510, and the rear arc-extinguishing chamber 520, improving assembly efficiency. The layout of the front stationary contact position 493, the front moving contact position, the rear stationary contact position 494, and the rear moving contact position ensures that when the isolation structure 400 is applied to a circuit breaker, there is a large opening distance between the front moving contact 121 and the front stationary contact 155, and between the rear moving contact 131 and the rear stationary contact 156.

[0152] It should be noted that the front chamber 420 may not have a separate front outlet 4954. Instead, one end of the front mounting area 4953 in direction d3 is connected to the front contact area 4952 and the other end in direction d3 is open, so that the exhaust end of the front arc-extinguishing chamber 510 can be connected to the external environment. Similarly, the rear chamber 460 may not have a separate rear outlet 4964. Instead, one end of the rear mounting area 4963 in direction d3 is connected to the rear contact area 4962 and the other end in direction d3 is open, so that the exhaust end of the rear arc-extinguishing chamber 520 can be connected to the external environment.

[0153] Furthermore, the width of the front contact area 4952 in direction d1 gradually increases from the end communicating with the front inlet 4951 to the end communicating with the front mounting area 4953; the width of the rear contact area 4962 in direction d1 gradually increases from the end communicating with the rear inlet 4961 to the end communicating with the rear mounting area 4963. The width of the front mounting area 4953 in direction d1 remains constant from the end communicating with the front contact area 4952 to the end communicating with the front outlet 4954; the width of one end of the rear mounting area 4963 in direction d1 remains constant from the end communicating with the rear contact area 4962 to the end communicating with the rear outlet 4964.

[0154] Furthermore, gas-generating structures are respectively provided in the front contact area 4952 and the rear contact area 4962. The gas-generating structures generate a large amount of gas under the burning of the electric arc, which can quickly cool the electric arc and promote the extinction of the electric arc.

[0155] Furthermore, the isolation structure 400 also includes a conductor mounting hole 401 disposed on one end of the partition plate 490 in direction d3; the two ends of the conductor mounting hole 401 in direction d1 are respectively connected to the front chamber 420 and the rear chamber 460, and the conductor mounting hole 401 in direction d2 is located between the front inlet 4951 and the rear inlet 4961, for accommodating the series conductor of the front stationary contact 155 and the rear stationary contact 156 (that is, the conductive beam 153 of the stationary contact structure 150).

[0156] In another embodiment of the isolation structure 400, the isolation structure 400 does not have conductor mounting holes 401. The series conductor is a conductor with its own insulation or is wrapped with insulation. In this case, the isolation structure 400 only needs to have a structure for supporting and limiting the series conductor, and does not need to completely wrap the series conductor.

[0157] Furthermore, such as Figure 24 , 28 As shown in Figure -29, the front chamber 420 has a front mounting port at the end opposite to the partition plate 490, for the front arc-extinguishing chamber 510 to be installed into the front chamber 420, that is, the front arc-extinguishing chamber 510 is installed into the front chamber 420 through the front mounting port; the rear chamber 460 has a rear mounting port at the end opposite to the partition plate 490, for the rear arc-extinguishing chamber 520 to be installed into the rear chamber 460, that is, the rear arc-extinguishing chamber 520 is installed into the rear chamber 460 through the rear mounting port. Furthermore, the isolation structure 400 cooperates with a pair of side walls of the housing 90 to respectively close the front mounting port and the rear mounting port.

[0158] Furthermore, such as Figure 24 , 27 As shown in Figure 28, the front chamber 420 has a first through hole 4401 on its side wall, which allows one end of the first arc-starting plate 610 that mates with the front moving contact 121 to pass through and extend out of the front chamber 420, so that the first arc-starting plate 610 can be electrically connected to the first terminal 810; the rear chamber 460 has a second through hole 4811 on its side wall, which allows one end of the second arc-starting plate 620 that mates with the rear moving contact 131 to pass through and extend out of the rear chamber 460, so that the second arc-starting plate 620 can be electrically connected to the second terminal 820.

[0159] Furthermore, such as Figure 24 , 28 As shown in Figure 29, the isolation structure 400 further includes a front limiting structure 430 and a rear limiting structure 470 respectively disposed on both sides of the partition plate 490; the front limiting structure 430 cooperates with the front arc-extinguishing chamber 510 to keep the front arc-extinguishing chamber 510 in a preset position within the front chamber 420; the rear limiting structure 470 cooperates with the rear arc-extinguishing chamber 500 to keep the rear arc-extinguishing chamber 520 in a preset position within the rear chamber 460.

[0160] like Figure 24 , 28 As shown in Figure 29, one embodiment of the isolation structure 400 is presented.

[0161] like Figure 24 , 28As shown in Figure 29, the isolation structure 400 includes a left isolation member 410 and a right isolation member 450 that are joined together opposite each other along direction d1. The left partition 410 includes a left partition 491, a first front baffle 440, a first rear baffle 480, and a left mounting groove 4011. The first front baffle 440 and the first rear baffle 480 are both connected to one end of the left partition 491 in direction d1, and are arranged opposite each other along direction d2, respectively located on both sides of the left partition 491 in direction d2. That is, the first front baffle 440 and the first rear baffle 480 are both connected to one end of the left partition 491 in direction d1 (this end is the left outer end), the first front baffle 440 and the first rear baffle 480 are arranged opposite each other along direction d2, and the first front baffle 440 and the first rear baffle 480 are respectively located on both sides of the left partition 491 in direction d2. The left mounting groove 4011 is provided on one end of the left partition 491 in direction d3. The right partition 450 includes a right partition 492, a second front baffle 441, a second rear baffle 481, and a right mounting groove 4012. The second front baffle 441 and the second rear baffle 481 are both connected to one end of the right partition 492 in direction d1 (this end is the right outer end), and are arranged opposite to each other along direction d2 and are respectively located on both sides of the right partition 492 in direction d2. That is, the second front baffle 441 and the second rear baffle 481 are both connected to one end of the right partition 492 in direction d1, and the second front baffle 441 and the second rear baffle 481 are arranged opposite to each other along direction d2, and the second front baffle 441 and the second rear baffle 481 are respectively located on both sides of the right partition 492 in direction d2. The right mounting groove 4012 is provided on one end of the right partition 492 in direction d3. The left partition 491 and the right partition 492 are arranged sequentially along direction d1 and joined together to form a partition plate 490; the first front baffle 440 and the second front baffle 441 are arranged opposite each other along direction d1, and the first front baffle 440, the partition plate 490 and the second front baffle 441 form a front chamber 420, and the front inlet 4951 and the front outlet 4954 of the front chamber 420 are respectively arranged corresponding to the two ends of the partition plate 490 in direction d3; the first rear baffle 480 and the second rear baffle 481 are arranged opposite each other along direction d1, and the first rear baffle 480, the partition plate 490 and the second rear baffle 481 form a rear chamber 460, and the rear inlet 4961 and the rear outlet 4964 of the rear chamber 460 are respectively arranged corresponding to the two ends of the partition plate 490 in direction d3; the left mounting groove 4011 and the right mounting groove 4012 are joined together opposite each other along direction d2 to form a conductor mounting hole 401.

[0162] In another embodiment of the conductor mounting hole 401, the left isolator 410 is provided with a left mounting groove 4011, and the right isolator 450 is provided with a cover plate. The cover plate is opposite to the left mounting groove 4011 along direction d2, and the cover plate covers the left mounting groove 4011 to form the conductor mounting hole 401; or, the right isolator 450 is provided with a right mounting groove 4012, and the left isolator 410 is provided with a cover plate. The cover plate is opposite to the right mounting groove 4012 along direction d2, and the cover plate covers the right mounting groove 4012 to form the conductor mounting hole 401.

[0163] Furthermore, such as Figure 24 , 28 As shown in Figure -29, the left isolation member 410 further includes a left splicing structure 433 disposed on the left partition 491, and the right isolation member 450 is further provided with a right splicing structure 473 disposed on the right partition 492; the left isolation member 410 and the right isolation member 450 are spliced ​​together by the left splicing structure 433 and the right splicing structure 473 to form an isolation structure 400. Furthermore, the left splicing structure 433 and the right splicing structure 473 are fitted together relative to each other along direction d2.

[0164] Specifically, the left splicing structure 433 includes a lower left splicing structure 4331 and an upper left splicing structure 4332 arranged at intervals along direction d3. The left splicing structure 433 and the first front baffle 440 are respectively arranged at both ends of the left partition 491 in direction d1. The lower left splicing structure 4331 and the upper left splicing structure 4332 are provided on one side with multiple left limiting ribs arranged side by side along direction d1. The right splicing structure 473 includes a lower right splicing structure 4731 and an upper right splicing structure 4732 arranged at intervals along direction d3. The right splicing structure 473 and the second front baffle 441 are respectively arranged at both ends of the right partition 492 in direction d1. The lower right splicing structure 4731 and the upper right splicing structure 4732 are each provided on one side with multiple right limiting ribs arranged side by side along direction d1. The lower left splicing structure 4331 and the lower right splicing structure 4731 are spliced ​​together relative to each other along direction d1, such that the left limiting rib of the lower left splicing structure 4331 and the right limiting rib of the lower right splicing structure 4731 are alternately arranged along direction d1 to prevent the left isolation member 410 and the right isolation member 450 from separating along direction d1; the upper left splicing structure 4332 and the upper right splicing structure 4732 are spliced ​​together along direction d2, such that the left limiting rib of the upper left splicing structure 4332 and the upper right splicing structure 4732 are alternately arranged along direction d1 to prevent the left isolation member 410 and the right isolation member 450 from separating along direction d1. Furthermore, the mutual splicing of the left splicing structure 433 and the right splicing structure 473 also serves to prevent the left isolation member 410 and the right isolation member 450 from moving relative to each other along direction d3.

[0165] Furthermore, a portion of the upper left splicing structure 4332 protrudes towards the side where the left partition 491 is located relative to the right partition 492, and a portion of the lower left splicing structure 4331 protrudes towards the side where the left partition 491 is located relative to the right partition 492; a portion of the upper right splicing structure 4732 protrudes towards the side where the right partition 492 is located relative to the left partition 491, and a portion of the lower right splicing structure 4731 protrudes towards the side where the right partition 492 is located relative to the left partition 491; the portion of the left partition 491 located between the upper left splicing structure 4332 and the lower left splicing structure 4331 abuts against the portion of the right partition 492 located between the upper right splicing structure 4732 and the lower right splicing structure 4731 along direction d1, forming a separation splicing seam between the two. Furthermore, the other end of the left partition 491 in direction d1 is the left inner end, that is, the end of the left partition 491 opposite to the left outer end in direction d1; the upper left splicing structure 4332 is divided into two parts in direction d1, one part overlaps with the left partition 491 and this part is the upper left overlapping part, and the other part protrudes relative to the left partition 491 towards the side where the right partition 492 is located and this part is the upper left protrusion; the lower left splicing structure 4331 is divided into two parts in direction d1, one part overlaps with the left partition 491 and this part is the lower left overlapping part, and the other part protrudes relative to the left partition 491 towards the side where the right partition 492 is located and this part is the lower left protrusion; the other end of the right partition 492 in direction d1 is the right inner end, that is, the end of the right partition 492 opposite to the left outer end in direction d1. The right outer end is opposite to the left outer end; the upper right splicing structure 4732 is divided into two parts in direction d1, one part overlaps with the right partition 492 and this part is the upper right overlapping part, and the other part protrudes relative to the right partition 492 towards the side where the left partition 491 is located and this part is the upper right protrusion; the lower right splicing structure 4731 is divided into two parts in direction d1, one part overlaps with the right partition 492 and this part is the lower right overlapping part, and the other part protrudes relative to the right partition 492 towards the side where the left partition 491 is located and this part is the lower right protrusion; the upper left overlapping part and the upper right protrusion are oppositely engaged in direction d2, the upper left protrusion and the upper right overlapping part are oppositely engaged in direction d2, the lower left overlapping part and the lower right protrusion are oppositely engaged in direction d2, and the lower left protrusion and the lower right overlapping part are oppositely engaged in direction d2. Furthermore, the portion of the left inner end of the left partition 491 located between the upper left splicing structure 4332 and the lower left splicing structure 4331, and the portion of the right inner end of the right partition 492 located between the upper right splicing structure 4732 and the lower right splicing structure 4731, abut against each other along direction d1, forming a separation splicing seam between them.

[0166] It should be noted that the specific structures of the left splicing structure 433 and the right splicing structure 473 are not limited to the above-described manner. Those skilled in the art can make various other modifications based on conventional technical means, all of which should fall within the protection scope of this application.

[0167] Furthermore, such as Figure 24 , 28 As shown in Figure 29, the isolation structure 400 further includes a front limiting structure 430 and a rear limiting structure 470 respectively disposed on both sides of the partition plate 490; the front limiting structure 430 cooperates with the front arc-extinguishing chamber 510 to keep the front arc-extinguishing chamber 510 in a preset position within the front chamber 420; the rear limiting structure 470 cooperates with the rear arc-extinguishing chamber 520 to keep the rear arc-extinguishing chamber 520 in a preset position within the rear chamber 460.

[0168] Specifically, the front limiting structure 430 includes a front lower limiting structure 431 and a front upper limiting structure 432 arranged at intervals along direction d3, and the front contact area 4952, the front upper limiting structure 432 and the front lower limiting structure 431 are arranged sequentially along direction d3; the front upper limiting structure 432 includes a plurality of grid plate slots arranged side by side at intervals along direction d1; the front upper limiting structure 432 and the front lower limiting structure 431 are respectively used to limit and cooperate with an arc-extinguishing partition (the arc-extinguishing partition is a front mating partition) of the front arc-extinguishing chamber 510, preventing the front arc-extinguishing chamber 510 from moving relative to the isolation structure 400 along direction d3; the grid plate slots are used to insert and cooperate one-to-one with the arc-extinguishing grid plates 530 of the front arc-extinguishing chamber 510, preventing the front arc-extinguishing chamber 510 from moving relative to the isolation structure 400 along direction d1. The rear limiting structure 470 includes a rear lower limiting structure 471 and a rear upper limiting structure 472 arranged at intervals along direction d3. The rear contact area 4962, the rear upper limiting structure 472, and the rear lower limiting structure 471 are arranged sequentially along direction d3. The rear upper limiting structure 472 includes a plurality of grid plate slots arranged side by side at intervals along direction d1. The rear upper limiting structure 472 and the rear lower limiting structure 471 are respectively used to limit and cooperate with an arc-extinguishing partition (which is a rear-fitting partition) of the rear arc-extinguishing chamber 520 to prevent the rear arc-extinguishing chamber 520 from moving along direction d3. The grid plate slots are used to insert and cooperate one-to-one with the arc-extinguishing grid plates 530 of the rear arc-extinguishing chamber 520 to prevent the rear arc-extinguishing chamber 520 from moving relative to the isolation structure 400 along direction d1. Furthermore, the partition plate 490 has a front side and a rear side on both sides in direction d2, respectively; the front upper limit structure 432 is a set of protruding ribs provided on the front side of the partition plate, which protrude along direction d2 relative to the side of the partition plate 490 where the arc-extinguishing chamber 510 is located, and the protruding ribs are provided with multiple grid slots arranged side by side and spaced apart along direction d1; the front lower limit structure 431 is a set of protruding ribs provided on the front side of the partition plate, which protrude along direction d2 relative to the side of the partition plate 490 where the arc-extinguishing chamber 510 is located; a set of arc-extinguishing partitions of the front arc-extinguishing chamber 510 are engaged between the front upper limit structure 432 and the front lower limit structure 431, and the two ends of the arc-extinguishing partitions in direction d2 are respectively engaged with the front upper limit structure 432. The upper limit structure 432 and the lower limit structure 431 are mutually limiting and engaged; the upper limit structure 472 is a set of protruding ribs provided on the rear side of the partition plate, the protruding ribs protrude along direction d2 relative to the partition plate 490 towards the side where the arc-extinguishing chamber 520 is located, the protruding ribs are provided with multiple grid slots arranged side by side at intervals along direction d1; the lower limit structure 471 is a set of protruding ribs provided on the rear side of the partition plate, the protruding ribs protrude along direction d2 relative to the partition plate 490 towards the side where the arc-extinguishing chamber 520 is located; a set of arc-extinguishing partitions of the rear arc-extinguishing chamber 520 are engaged between the upper limit structure 472 and the lower limit structure 471, the two ends of the arc-extinguishing partitions in direction d2 are respectively mutually limiting and engaged with the upper limit structure 472 and the lower limit structure 471.

[0169] Furthermore, the front mating partition and the rear mating partition are located on both sides of the partition plate 490 in the direction d2, and the three are stacked. The front mating partition and the rear mating partition cover the joint of the isolation component from both sides in the direction d2, which helps to improve the creepage distance and insulation gap between the front chamber 420 and the rear chamber 460.

[0170] Furthermore, such as Figure 22 , 24 As shown in Figures 28-29, the portion of the first front baffle 440 corresponding to the front contact area 4952 is provided with a first through hole 4401, which is used for one end of the first arc-guiding plate 610 cooperating with the front moving contact 121 to pass through and extend out of the front chamber 420; the portion of the second rear baffle 481 corresponding to the rear contact area 4962 is provided with a second through hole 4811, which is used for one end of the second arc-guiding plate 620 cooperating with the rear moving contact 131 to pass through and extend out of the rear chamber 460.

[0171] In other embodiments, the first front baffle 440 does not have a first through hole 4401, but one end of the first arc-guiding plate 610 extends directly out of the front chamber 420 through the front inlet 4951; and / or, the second rear baffle 481 does not have a second through hole 4811, but the second arc-guiding plate 620 extends directly out of the rear chamber 460 through the rear inlet 4961.

[0172] Furthermore, such as Figure 24 , 28 As shown in -29, the front stationary contact position 493 includes a front stationary contact slot for inserting the front support plate 1531 of the front stationary contact 155 along direction d2; the rear stationary contact position 494 includes a rear stationary contact slot for inserting the rear support plate 1532 of the rear stationary contact 156 along direction d2; the front stationary contact slot and the rear stationary contact slot are respectively connected to the two ends of the conductor mounting hole 401 in direction d1.

[0173] like Figure 1-6 As shown, the circuit breaker in this embodiment also includes a first terminal block 830 and a second terminal block 840; one end of the first terminal block 830 is engaged with a first terminal 810, and the other end is electrically connected to the front moving contact 121 of the front moving contact assembly 120 via a first flexible connection 850 and is also electrically connected to the first arc-starting plate 610; one end of the second terminal block 840 is engaged with a second terminal 820, and the other end is electrically connected to the rear moving contact 131 of the rear moving contact assembly 130 via a second flexible connection 860 and is also electrically connected to the second arc-starting plate 620.

[0174] Specifically, the first terminal 810 includes a first wiring screw and a first wiring hole for use. One end of the first wiring plate 830 is inserted into the first wiring frame, and the other end of the first wiring plate 830 is welded to the first flexible connection 850 and to the first arc-starting plate 610. The second terminal 820 includes a second wiring screw and a second wiring hole for use. One end of the second wiring plate 840 is inserted into the second wiring frame, and the other end of the second wiring plate 840 is welded to one end of the second flexible connection 860 and to the second arc-starting plate 620. Furthermore, both the first wiring frame and the second wiring frame are movable along direction d3.

[0175] like Figure 1-6 As shown in Figure 21, this is one embodiment of the thermomagnetic tripping device 700. The thermomagnetic tripping device 700 of this embodiment includes a short-circuit protection mechanism and an overload protection mechanism.

[0176] like Figure 1-6 As shown, the short-circuit protection mechanism includes a magnetic yoke 710, an armature 720, an armature spring 730, and a conductive plate. The magnetic yoke 710 is fixedly installed, the armature 720 is rotatably installed and drives the operating mechanism 200. The conductive plate is connected in series with the contact system 100 and is positioned between the magnetic yoke 710 and the armature 720. The armature spring 730 acts on the armature 720, causing it to rotate and separate from the magnetic yoke 710. When a short-circuit current flows through the conductive plate, the armature 720 is attracted by the magnetic yoke 710 and rotates, driving the operating mechanism 200 to trip. Further, the conductive plate is served by a second terminal block 840; the armature spring 730 is a tension spring, with one end connected to the second terminal block 840 and the other end connected to the magnetic yoke 710.

[0177] like Figure 1-6As shown, the overload protection mechanism includes a bimetallic strip 740. One end of the bimetallic strip 740 is fixedly installed and electrically connected to the contact system 100, and the other end is driven to cooperate with the operating mechanism 200. When an overload current flows through the contact system 100, the bimetallic strip 740 bends and drives the operating mechanism 200 to trip. Furthermore, the second terminal block 840 includes a terminal connection plate 845 connected in series with the contact system 100; one end of the bimetallic strip 740 is fixedly disposed and electrically connected to one end of the terminal connection plate 845, and the middle part of the bimetallic strip 740 and the contact system 100 are also electrically connected to the other end of the terminal connection plate 845. When an overload current occurs in the circuit where the circuit breaker of this embodiment is located, the overload current is divided into two parts, one part flows only through the terminal connection plate 845, and the other part returns to the terminal connection plate 845 through the bimetallic strip 740. This current shunting design avoids the situation where the current flowing through the bimetallic strip 740 is too large when the overload current is too large, resulting in severe heat generation and affecting the temperature rise characteristics of the product. Furthermore, the overload protection mechanism also includes a conductive mounting member 750, one end of the bimetallic strip 740 is fixedly connected to the mounting member 750, the mounting member 750 is fixedly connected to the second terminal block 840, and the middle part of the bimetallic strip 740 is also electrically connected to the second terminal block 840 through a third flexible connection 870. Furthermore, the mounting component 750 is an elastic component; the overload protection mechanism also includes an adjusting screw 760. One end of the mounting component 750 is fixedly connected to the second terminal block 840, the middle part is fixedly connected to one end of the bimetallic strip 740, and the other end is in transmission cooperation with the adjusting screw 760; the adjusting screw 760 is rotated by external force, pressing against the mounting component 750 to adjust the position of the bimetallic strip 740.

[0178] Specifically, the mounting component 750 includes a mounting component connecting part 751, a mounting component mounting part 752, and a mounting component adjusting part 753 connected in sequence. The mounting component connecting part 751 is connected to the first section 846 of the connecting plate of the wiring connection plate 845. One end of the bimetallic strip 740 is connected to the mounting component mounting part 752. The mounting component adjusting part 753 is in a transmission engagement with the adjusting screw 760.

[0179] like Figure 1-6As shown in Figure 21, the second terminal block 840 includes a terminal mating plate 841, an outer plate 842, a bottom plate 843, and an inner plate 844 connected in sequence, as well as a hanging spring plate 848 and a terminal connecting plate 845 respectively connected to the inner plate 844. The terminal mating plate 841 mates with the second terminal 820. The outer plate 842 and the inner plate 844 are arranged opposite each other along direction d1, and the outer plate 842, the bottom plate 843, and the inner plate 844 form a U-shaped structure. The inner plate 844... 4. As a conductive plate of the short-circuit protection mechanism, the magnetic yoke 710 is fixedly connected to the inner plate 844. The armature 720 is located between the outer plate 842 and the inner plate 844. One end of the armature 720 is rotatably mounted on the inner plate 844. The armature spring 730 is a tension spring, with one end connected to the hanging spring plate 848 and the other end connected to the armature 720. The wiring connection plate 845 is connected to one end of the second flexible connection 860 and is fixedly connected to the mounting part 750 of the overload protection mechanism.

[0180] Furthermore, the wiring mating plate 841 is bent and connected to the outer plate 842 and bent away from the inner plate 844; the hanging spring plate 848 is bent and connected to the inner plate 844 and bent towards the outer plate 842.

[0181] Furthermore, the hanging spring plate 848 is preferably provided with multiple stop holes, and when one end of the armature spring 730 is hung in different stop holes, the force applied to the armature 720 is different.

[0182] Furthermore, the wiring connection plate 845 includes a first connecting plate segment 846 and a second connecting plate segment 847 that are bent and connected together. One end of the first connecting plate segment 846 is connected to the inner plate 844 and the other end is bent and connected to the second connecting plate segment 847. The first connecting plate segment 846 and the inner plate 844 are coplanar. The second connecting plate segment 847 is bent away from the outer plate 842. The first connecting plate segment 846 is fixedly connected to the second arc-guiding plate 620 and the mounting component 750. The second connecting plate segment 847 is electrically connected to one end of the second flexible connection 860 and one end of the third flexible connection 870, respectively.

[0183] Furthermore, the armature component 720 includes an armature body 721, which includes an armature main plate and armature side arms. Two sets of armature side arms are bent and connected to both ends of the armature main plate and are in a U-shape. The free ends of the armature side arms are provided with armature slots. An armature support portion 8491 is provided on each side of the end of the inner plate 844 away from the bottom plate 843. The armature slots and armature support portions 8491 abut against each other. The two armature side arms are located on both sides of the inner plate 844 along direction d2. One end of the armature main plate is provided with a notch for avoiding the armature spring 730, and the other end is opposite to the bottom plate 843. Furthermore, one end of the armature main plate is provided with a notch for avoiding the armature spring 730, and the other end is provided with a limiting groove. The armature main plate is slidably locked onto the bottom plate 843 through the limiting groove. The magnetic yoke component 710 is a flat plate structure and is stacked with the inner plate 844 along direction d1. Furthermore, the bottom plate 843 is provided with armature limiting parts 8492 on both sides of the end connected to the outer plate 842, and the armature spring 730 causes the part of the armature main plate located on both sides of the limiting groove to be limited and cooperated with the two armature limiting parts 8492 respectively.

[0184] Furthermore, the armature 720 also includes an armature drive finger 722, one end of which is connected to the main armature board, and the other end is in transmission engagement with the first arm 2043 of the locking member 204 of the operating mechanism 200; the armature drive finger 722 is used to press against the first arm 2043 of the locking member and drive the locking member 204 to rotate, so that the locking member 204 and the jump fastener 203 are released from the latching engagement.

[0185] Furthermore, the thermomagnetic tripping device 700 also includes a thermo-tripping transmission component 205, which is rotatably mounted on the housing 90 and respectively engages with the second arm 2044 of the locking member and the bimetallic strip 740 of the operating mechanism 200. When an overload fault occurs in the circuit where the circuit breaker of this embodiment is located, the bimetallic strip 740 drives the thermo-tripping transmission component 205 to rotate, and the thermo-tripping transmission component 205 presses against the second arm 2044 of the locking member to drive the locking member 204 to rotate, thereby releasing the locking member 204 from the latching engagement with the trip fastener 203. Furthermore, the thermal release transmission component 205 includes a transmission component front arm 2051, a transmission component rear arm 2052, and a transmission component mounting part 2053. The thermal release transmission component 205 is rotatably mounted on the housing 90 via the transmission component mounting part 2053. One end of the transmission component front arm 2051 and the transmission component rear arm 2052 are respectively connected to the transmission component mounting part 2053, and the other end is respectively connected to the bimetallic strip 740 and the locking member driven post 2045 of the second arm 2044 of the locking member. The transmission component front arm 2051 and the transmission component rear arm 2052 are arranged sequentially along the rotation direction of the transmission component 205.

[0186] 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.

[0187] 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. An operating system comprising a contact system (100), a rotatably configured operating element (201), a connecting rod (202), and a latching element (203) and a locking element (204) that interlock and rotatably engage with each other; the contact system (100) comprising a front moving contact assembly (120) and a rear moving contact assembly (130) that rotate synchronously in opposite directions, and a stationary contact structure (150); the front moving contact assembly (120) comprising a front support (122) and a front moving contact (121) disposed on the front support (122), the rear moving contact assembly (130) comprising a rear support (132) and a rear moving contact (131) disposed on the rear support (132), and the stationary contact structure (150) comprising a... The front stationary contact (155) of the front stationary contact (151) and the rear stationary contact (156) with the rear stationary contact (152); the front moving contact assembly (120) and the rear moving contact assembly (130) are closed and opened with the front stationary contact (155) and the rear stationary contact (156) respectively by synchronous reverse rotation; the rotation axes of the operating member (201), the front moving contact assembly (120), the rear moving contact assembly (130), the jump fastener (203) and the locking fastener (204) are all parallel to the direction d2, the jump fastener (203) and the locking fastener (204) are rotatably mounted on the front support (122) or the rear support (132), and the two ends of the connecting rod (202) are respectively connected to the operating member (201) and the jump fastener (203); Its features are: In the direction d2, the front moving contact (121) and the rear moving contact (131) are offset, and the front stationary contact (151) and the rear stationary contact (152) are offset. In direction d1, the front moving contact (121) and the front stationary contact (155) are arranged side by side opposite each other, and the rear moving contact (131) and the rear stationary contact (156) are arranged side by side opposite each other. Direction d1 and direction d2 are perpendicular to each other. In the open state and in direction d2, the front moving contact (121) and the rear stationary contact (156) are arranged side by side, and the rear moving contact (131) and the front stationary contact (155) are arranged side by side.

2. The operating system according to claim 1, characterized in that: On the orthogonal projection of the operating system in the direction d2, the front moving contact (121) and the rear moving contact (131) are symmetrically arranged, the front stationary contact (155) and the rear stationary contact (156) are symmetrically arranged, and the front moving contact (121) and the rear moving contact (131) are cross-arranged when the operating system is in the closed state.

3. The operating system according to claim 1, characterized in that: The stationary contact structure (150) also includes a series conductor extending along direction d1, with the front stationary contact (155), the series conductor, and the rear stationary contact (156) connected in series in sequence; the front moving contact (1211) of the front moving contact (121), the rear moving contact (1311) of the rear moving contact (131), the front stationary contact (151), and the rear stationary contact (152) are all located in direction d3 between the series conductor and the arc extinguishing system (300) for cooperating with the contact system (100); the directions d1, d2, and d3 are perpendicular to each other.

4. The operating system according to claim 3, characterized in that: The series conductor is located between the front moving contact (121) and the rear moving contact (131) in the direction d2.

5. The operating system according to claim 4, characterized in that: The stationary contact structure (150) also includes a conductive crossbeam (153), the front stationary contact (155) also includes a front support plate (1531), the front stationary contact (151) is disposed on one side of the front support plate (1531), the rear stationary contact (156) includes a rear support plate (1532), the rear stationary contact (152) is disposed on one side of the rear support plate (1532), the front support plate (1531), the conductive crossbeam (153) and the rear support plate (1532) are connected in sequence and are an integral structure, one end of the front support plate (1531) and the rear support plate (1532) are bent to the same side relative to the conductive crossbeam (153), and the conductive crossbeam (153) serves as a series conductor.

6. The operating system according to claim 5, characterized in that: In the direction d2, a front clearance notch is provided on one side of the rear support plate (1532) and the conductive crossbeam (153), and a rear clearance notch is provided on one side of the front support plate (1531) and the conductive crossbeam (153). The front clearance notch and the rear clearance notch are located on both sides of the conductive crossbeam (153). In the direction d1, the front clearance notch is arranged side by side with the front support plate (1531) and is used to avoid the front moving contact (121). The rear clearance notch is arranged side by side with the rear support plate (1532) and is used to avoid the rear moving contact (131).

7. The operating system according to claim 6, characterized in that: The front support plate (1531) includes a front support main plate (15311) and a front support connecting plate (15312) bent and connected together. The rear support plate (1532) includes a rear support main plate (15321) and a rear support connecting plate (15322) bent and connected together. The front support connecting plate (15312), the conductive crossbeam (153), and the rear support connecting plate (15322) are connected in sequence and form a Z-shaped structure. The front support connecting plate (15312) and the rear support connecting plate (15322) are parallel to each other. The widths of the front support plate (1531) and the rear support plate (1532) in the direction d2 are the same and greater than those of the conductive crossbeam (15311). The width of the front support plate (1531) and the rear support plate (1532) in the direction d2; in the orthogonal projection of the operating system with the projection direction of the direction d1, the ends of the front support plate (1531) and the rear support plate (1532) that are close to each other coincide with the conductive beam (153), and the other ends of the front support plate (1531) and the rear support plate (1532) are located on both sides of the conductive beam (153); in the orthogonal projection of the operating system with the projection direction of the direction d2, the swing paths of the rear support plate (1532) and the conductive beam (153) overlap with the swing paths of the front moving contact (121), and the swing paths of the front support plate (1531) and the conductive beam (153) overlap with the swing paths of the rear moving contact (131).

8. The operating system according to claim 7, characterized in that: The front support motherboard (15311) has one end connected to the front support connecting plate (15312) as the first upper end and the other end as the first lower end. The rear support motherboard (15321) has one end connected to the rear support connecting plate (15322) as the second upper end and the other end as the second lower end. On the orthogonal projection of the operating system in the projection direction of direction d2, the distance between the first upper end and the second upper end is less than the distance between the first lower end and the second lower end.

9. The operating system according to claim 4, characterized in that: The series conductor, the front stationary contact (155), and the rear stationary contact (156) are separate structures; the front stationary contact (155) also includes a front support plate (1531), and the front stationary contact (151) is disposed on one side of the front support plate (1531); the rear stationary contact (156) also includes a rear support plate (1532), and the rear stationary contact (152) is disposed on one side of the rear support plate (1532); the two ends of the series conductor are electrically connected to the front support plate (1531) and the rear support plate (1532) respectively.

10. The operating system according to claim 1, characterized in that: The front moving contact assembly (120) further includes a front support (122), the front moving contact assembly (120) is rotatably mounted via the front support (122), and one end of the front moving contact (121) is mounted on the front support (122); the rear moving contact assembly (130) further includes a rear support (132), the rear moving contact assembly (130) is rotatably mounted via the rear support (132), and one end of the rear moving contact (131) is mounted on the rear support (132); the other end of the front moving contact (121) and the other end of the rear moving contact (131) respectively cooperate with the front stationary contact (155) and the rear stationary contact (156); The front moving contact (121) is disposed on one axial end of the front support (122) and this end is the front support mounting end; the rear moving contact (131) is disposed on one axial end of the rear support (132) and this end is the rear support mounting end; the front support mounting end and the rear support mounting end face opposite directions. The front moving contact assembly (120) further includes a front contact spring (123), which is a torsion spring; the operating system further includes a first mounting post (1222) disposed on the front support mounting end, the front support (122) including a front support limiting part (1225) disposed on the front support mounting end, the first mounting post (1222) and the front support (122) being an integral structure or a separate structure; the front moving contact (121) includes a front moving contact plate mounting section (1215) and a front moving contact plate limiting part (1216) disposed at one end, the front moving contact plate mounting section (1215) and the front moving contact plate limiting part (1216) being ... 5) A front movable contact plate mounting hole (1217) is provided. The front movable contact (121) is rotatably sleeved on the first mounting post (1222) through the front movable contact plate mounting hole (1217). The front contact spring (123) is sleeved on the first mounting post (1222). One spring arm cooperates with the front movable contact plate limiting part (1216) and the other spring arm cooperates with the front support limiting part (1225), so that the front movable contact plate limiting part (1216) and the front support limiting part (1225) abut and limit each other. The front movable contact plate limiting part (1216) and the front support limiting part (1225) are located between the two spring arms. The rear moving contact assembly (130) further includes a rear contact spring (133), which is a torsion spring; the operating system further includes a second mounting post (1322) disposed on the rear support mounting end, the rear support (132) including a rear support limiting part (1324) disposed on the rear support mounting end, the second mounting post (1322) and the rear support (132) being an integral structure or a separate structure; the rear moving contact (131) includes a rear moving contact plate mounting section (1315) and a rear moving contact plate limiting part (1316) disposed at one end, the rear moving contact plate mounting section (1315) including ... 15) A rear movable contact plate mounting hole (1317) is provided. The rear movable contact (131) is sleeved on the second mounting post (1322) through the rear movable contact plate mounting hole (1317). The rear contact spring (133) is sleeved on the second mounting post (1322). One spring arm cooperates with the rear movable contact plate limiting part (1316) and the other spring arm cooperates with the rear support limiting part (1324), so that the rear movable contact plate limiting part (1316) and the rear support limiting part (1324) abut and limit each other. The rear movable contact plate limiting part (1316) and the rear support limiting part (1324) are located between the two spring arms. The operating system also includes a locking spring (207), which cooperates with the locking member (204) and the rear support (132) respectively. The locking spring (207) is used to keep the locking member (204) and the jumper (203) in a latching engagement and to limit the locking member (204) and the rear support (132) in a limiting engagement after the operating system is disengaged. The other axial end of the rear support (132) is the rear support bearing end, and the jumper (203), the locking member (204) and the locking spring (207) are all disposed on the rear support bearing end. The front support (122) and the rear support (132) are connected by a drive; The front support (122) includes a first gear (1223) that is coaxially and synchronously arranged with it, and the rear support (132) includes a second gear (1323) that is coaxially and synchronously arranged with it. The first gear (1223) and the second gear (1323) mesh with each other. The operating system also includes a main reset component (140), which is a torsion spring; the operating system also includes a first rear positioning post (1224), and the front support (122) also includes a front support reset part (1226). The first rear positioning post (1224) and the front support reset part (1226) are both disposed on the other axial end of the front support (122). The main reset component (140) is sleeved on the first rear positioning post (1224). One spring arm is fixedly disposed on the housing structure for accommodating the operating system, and another spring cooperates with the front support reset part (1226); the main reset component (140) causes the front moving contact assembly (120) and the rear moving contact assembly (130) to have a tendency to rotate in opposite directions and disconnect from the front stationary contact (155) and the rear stationary contact (156) respectively.

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