Operating mechanism of circuit breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and particularly relates to an operating mechanism of a circuit breaker, which includes a handle, a connecting rod, a tripping fastener, a locking fastener, a moving contact member and an arc-shaped sliding groove arranged in the housing of the circuit breaker; the handle is pivotally arranged on the housing, one end protrudes outside the housing for user operation, the other end is rotatably connected to the front end of the connecting rod, the rear end of the connecting rod is inserted into a kidney-shaped connection hole arranged on the tripping fastener and is in sliding cooperation with the sliding groove, the buckling end of one end of the tripping fastener is buckled with the buckling table of the locking fastener, the other end of the tripping fastener is rotatably connected to one end of the moving contact member to form a tripping rotation center, the locking fastener is pivotally arranged on the housing, the moving contact member is rotatably arranged on a second rotating shaft through a kidney-shaped hole arranged in the middle thereof, and the other end of the moving contact member is provided with a moving contact for cooperating with a static contact; the operating mechanism of the circuit breaker of the present invention has a simple structure, is easy to assemble, and saves assembly space.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to an operating mechanism of a circuit breaker. Background Art

[0002] The existing circuit breakers have complex structures and processes, making it difficult to achieve automated production. Moreover, the operating mechanisms of existing circuit breakers occupy a large space and cannot meet the requirements of the development trends of intelligentization and miniaturization of circuit breakers; once additional product functions, such as detection modules, communication modules, etc., are needed for the circuit breaker, the volume of the product will increase. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an operating mechanism of a circuit breaker, which has a simple structure, is easy to assemble, and saves assembly space.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An operating mechanism of a circuit breaker, which includes a handle 1, a connecting rod 2, a tripping part 3, a locking part 4, a moving contact part 6, and an arc-shaped sliding groove 5 arranged in a housing H of the circuit breaker;

[0006] The handle 1 is pivotally arranged on the housing H, one end protrudes outside the housing H for user operation, the other end is rotatably connected to the front end 20 of the connecting rod 2 of the connecting rod 2, the rear end 21 of the connecting rod 2 is inserted into a kidney-shaped connecting hole 31 arranged on the tripping part 3 and is in sliding cooperation with the sliding groove 5, one end of the tripping part 3, i.e., the buckling end 30, is buckled and cooperated with the buckling platform 40 of the locking part 4, the other end of the tripping part 3 is rotatably connected to one end of the moving contact part 6 to form a tripping rotation center, the locking part 4 is pivotally arranged on the housing H, the moving contact part 6 is rotatably arranged on a second rotating shaft 2rs through a kidney-shaped hole 62 arranged in the middle thereof, and the other end of the moving contact part 6 is provided with a moving contact 63 for cooperating with a static contact 7.

[0007] Preferably, the sliding groove 5 is arranged on the housing H, the sliding groove 5 is circular arc-shaped, and the center of the sliding groove 5 is located on the axis of the second rotating shaft 2rs; the locking part 4 is pivotally arranged on the housing H through the second rotating shaft 2rs.

[0008] Preferably, the free end of the rear end 21 of the connecting rod passes through the kidney-shaped connecting hole 31 and is inserted into the sliding groove 5.

[0009] Preferably, the handle 1 rotates in the closing direction, causing the rear end 21 of the connecting rod to move along the sliding groove 5. At the same time, the rear end 21 of the connecting rod drives the tripping fastener 3, the locking fastener 4, and the moving contact member 6 to rotate synchronously around the second rotating shaft 2rs until the moving contact 63 comes into initial contact with the static contact 7. The handle 1 continues to rotate in the closing direction, driving the moving contact member 6 to swing with the static contact 7 as the fulcrum, and the kidney-shaped hole 62 moves relative to the second rotating shaft 2rs, and the circuit breaker enters the closed state.

[0010] Preferably, it further includes a moving contact return spring for driving the moving contact member 6 to reset, and the locking fastener 4 is also drivingly cooperated with the protection mechanism of the circuit breaker;

[0011] When a fault occurs, the protection mechanism drives the locking fastener 4 to rotate, causing the buckling table 40 to release the buckling cooperation with the buckling end 30. The moving contact return spring releases energy to drive the moving contact member 6 to rotate, causing the moving contact 63 to disconnect from the static contact 7, and causing the tripping fastener 3 to rotate around the tripping rotation center, and the circuit breaker enters the tripping state.

[0012] Preferably, it further includes a locking fastener return spring connected to the locking fastener 4 and a handle return spring connected to the handle 1. The locking fastener return spring drives the locking fastener 4 to reset after the circuit breaker trips, and the handle return spring drives the handle 1 to rotate in the opening direction. The handle 1 drives the tripping fastener 3 to rotate around the tripping rotation center through the connecting rod 2, causing the buckling end 30 to re-buckle with the buckling table 40, and the circuit breaker enters the opening state.

[0013] Preferably, the connecting rod 2 is of a U-shaped structure, including a connecting rod middle part 22, a connecting rod front end 20, and a connecting rod rear end 21. The connecting rod front end 20 and the connecting rod rear end 21 are oppositely arranged and are respectively bent and connected to both ends of the connecting rod middle part 22.

[0014] Preferably, the tripping fastener 3 is rotationally connected to the moving contact member 6 through a first hinge shaft 603; the tripping fastener 3 further includes a tripping fastener connection hole 32. The buckling end 30 and the tripping fastener connection hole 32 are respectively arranged at both ends of the tripping fastener 3, and the kidney-shaped connection hole 31 is located between the buckling end 30 and the tripping fastener connection hole 32. The tripping fastener 3 is rotationally arranged on the first hinge shaft 603 through the tripping fastener connection hole 32.

[0015] Preferably, the tripping fastener 3 includes a thick plate part 3a and a thin plate part 3b. The thickness of the thick plate part 3a is greater than that of the thin plate part 3b. One end of the thin plate part 3b is provided with a buckling end 30, and the other end is connected to the thick plate part 3a and is provided with a kidney-shaped connection hole 31 at this end. The tripping fastener connection hole 32 is arranged on the thick plate part 3a; the thick plate part 3a and the thin plate part 3b are flush on one side and form a stepped structure on the other side. The rear end 21 of the connecting rod 2 of the connecting rod is inserted into the kidney-shaped connection hole 31 from one side of the stepped structure.

[0016] Preferably, the thick plate part 3a and the thin plate part 3b are flush on one side and this side is opposite to the sliding groove 5, and form a stepped structure on the other side.

[0017] Preferably, the locking fastener 4 includes a second linkage portion 4546. When a failure occurs, the moving contact return spring drives the moving contact member 6 to rotate, and the moving contact member 6 drives the locking fastener 4 to rotate through the second linkage portion 4546.

[0018] Preferably, the moving contact member 6 further includes a first linkage portion 6465, and the operating mechanism further includes a tripping linkage shaft connected to the locking fastener 4. Among two adjacent circuit breakers, one is called the front-stage circuit breaker and the other is called the rear-stage circuit breaker. The first linkage portion 6465 of the front-stage circuit breaker is in driving cooperation with the tripping linkage shaft of the rear-stage circuit breaker, and the tripping linkage shaft of the rear-stage circuit breaker is in driving cooperation with the second linkage portion 4546 of the front-stage circuit breaker. When the front-stage circuit breaker trips, its moving contact return spring drives the moving contact member 6 to rotate, the moving contact member 6 drives the first linkage portion 6465 to swing, and the first linkage portion 6465 drives the locking fastener 4 of the rear-stage circuit breaker to rotate through the tripping linkage shaft of the rear-stage circuit breaker, causing the rear-stage circuit breaker to trip. When the rear-stage circuit breaker trips, its locking linkage shaft drives the locking fastener 4 of the front-stage circuit breaker to rotate through the second linkage portion 4546 of the front-stage circuit breaker, causing the front-stage circuit breaker to trip.

[0019] Preferably, the moving contact member 6 includes a contact support 60 and a moving contact 61. One end of the moving contact 61 is connected to one end of the contact support 60, and a kidney-shaped hole 62 is provided at this end of the contact support 60. The other end is provided with a moving contact 63, and the other end of the contact support 60 is rotatably connected to the tripping fastener 3.

[0020] Preferably, the contact support 60 further includes a first hinge shaft 603 provided thereon. The first hinge shaft 603 and the contact support 60 are of an integral structure, and the contact support 60 is rotatably connected to the tripping fastener 3 through the first hinge shaft 603.

[0021] Preferably, the contact support 60 further includes a contact assembly groove 607 provided on one side thereof, and an upper baffle 604 and a lower baffle 605 respectively provided at both ends of the contact assembly groove 607. The kidney-shaped hole 62 is provided on one side of the contact assembly groove 607 and is located between the upper baffle 604 and the lower baffle 605. The moving contact 61 includes a contact limit groove 610, and the contact limit groove 610 and the moving contact 63 are respectively provided at both ends of the moving contact 61. One end of the moving contact 61 is assembled into the contact assembly groove 607, the contact limit groove 610 is in limit cooperation with the side wall of the kidney-shaped hole 62, one end of the side wall of the contact limit groove 610 is stuck between the upper baffle 604 and the contact assembly groove 607, and the middle of the moving contact 61 is stuck between the lower baffle 605 and the contact assembly groove 607.

[0022] Preferably, the contact support 60 further includes a tripping indication surface 601 and a closing indication surface 602 provided at one end thereof, and an indication hole H01 cooperating with the tripping indication surface 601 and the closing indication surface 602 is provided on the housing H; when the circuit breaker is closed, the handle 1 rotates in the closing direction and drives the moving contact member 6 to rotate around the second rotating shaft 2rs through the connecting rod 2, so that the closing indication surface 602 faces the indication hole H01; when the circuit breaker trips or opens, the moving contact return spring drives the moving contact member 6 to rotate around the second rotating shaft 2rs, so that the tripping indication surface 601 faces the indication hole H01.

[0023] Preferably, the contact support 60 further includes a first linkage portion 6465 provided on one side thereof. The first linkage portion 6465 includes a linkage portion connecting plate 65 and a linkage portion driving portion 64. One end of the linkage portion driving portion 64 is connected to the contact support 60 through the linkage portion connecting plate 65, and the extending direction of the linkage portion driving portion 64 is perpendicular to the extending direction of the moving contact member 6.

[0024] Preferably, the locking member 4 includes a mating arm 41 and a driven portion 42. A buckle platform 40 is provided at one end of the mating arm 41, and the other end of the mating arm 41 is connected to one end of the driven portion 42. The other end of the driven portion 42 is in driving cooperation with the short-circuit protection mechanism 8a; a locking connection hole 43 is provided at the connection between the mating arm 41 and the driven portion 42, and the locking member 4 is rotatably arranged on the second rotating shaft 2rs through the locking connection hole 43.

[0025] Preferably, the locking member 4 further includes a second linkage portion 4546. The second linkage portion 4546 includes a linkage portion base 45 and a linkage portion driven portion 46. One end of the linkage portion base 45 is connected to the driven portion 42, and the other end protrudes on one side of the driven portion 42. The linkage portion driven portion 46 is arranged at the end of the linkage portion base 45 far from the driven portion 42; the locking member 4 further includes a locking boss 44 provided at the end of the driven portion 42 in cooperation with the short-circuit protection mechanism 8a. The locking boss 44 and the structure 45 are arranged on the same side of the driven portion 42 and are located at both ends of the driven portion 42 respectively. The mating arm 41, the linkage portion base 45 and the locking boss 44 are respectively located at the three vertices of a triangle; during assembly, the linkage portion base 45 and the locking boss 44 are respectively located on both sides of the moving contact member 6.

[0026] Preferably, the housing H includes a base H0 and a cover used in cooperation; the chute 5 and the second rotating shaft 2rs are both arranged on the base H0; the moving contact member 6 and the locking member 4 are sequentially stacked on the base H0 and are both rotatably arranged on the second rotating shaft 2rs; one end of the moving contact member 6 and the jumping member 3 are sequentially arranged on one side of the chute 5, one end of the jumping member 3 is rotatably installed on the first hinge shaft 603 of the moving contact member 6 from the side away from the base H0 of the moving contact member 6, and the buckling end 30 at the other end of the jumping member 3 is buckled and cooperated with the buckling table 40 of the locking member 4; the rear end 21 of the connecting rod 2 of the connecting rod passes through the jumping member 3 from one side of the jumping member 3 and is inserted into the chute 5.

[0027] Compared with the operating mechanism of the existing circuit breaker, the operating mechanism of the circuit breaker of the present invention omits some components, such as the rotating plate, the over-travel spring, etc., significantly simplifies the structure of the operating mechanism, thereby reducing the installation space occupied by the operating mechanism, which conforms to the development trend of the intellectualization and miniaturization of the circuit breaker.

[0028] In addition, the operating mechanism of the circuit breaker of the present invention does not need to separately provide an indicating member for indicating the opening / closing state of the circuit breaker, further simplifies the structure of the operating mechanism, and reduces the required installation space. Brief Description of the Drawings

[0029] Figure 1 is a schematic principle diagram of the operating mechanism of the circuit breaker of the present invention;

[0030] Figure 2 is a schematic structural diagram of the operating mechanism of the circuit breaker of the present invention, which is in the open state;

[0031] Figure 3 is a three-dimensional structural diagram of the operating mechanism of the circuit breaker of the present invention, which is in the open state;

[0032] Figure 4 is a schematic structural diagram of the operating mechanism of the circuit breaker of the present invention, which is in the closed state;

[0033] Figure 5 is a schematic structural diagram of the operating mechanism of the circuit breaker of the present invention, which is in the tripped state;

[0034] Figure 6 is a schematic structural diagram of the base of the present invention;

[0035] Figure 7 is a schematic structural diagram of the moving contact member of the present invention, showing the structure on one side of the moving contact member;

[0036] Figure 8 is a schematic structural diagram of the moving contact member of the present invention, showing the structure on the other side of the moving contact member;

[0037] Figure 9It is a schematic structural diagram of the contact support of the present invention;

[0038] Figure 10 It is a schematic structural diagram of the moving contact of the present invention;

[0039] Figure 11 It is a schematic structural diagram of the locking fastener of the present invention, showing the structure on one side of the locking fastener;

[0040] Figure 12 It is a schematic structural diagram of the locking fastener of the present invention, showing the structure on the other side of the locking fastener;

[0041] Figure 13 It is a schematic structural diagram of the jumping fastener of the present invention;

[0042] Figure 14 It is a schematic structural diagram of the operating mechanism of the circuit breaker of the present invention, showing at least the first linkage part and the second linkage part. Detailed implementation manners

[0043] The following combines the Figures 1-14 Given embodiments to further illustrate the detailed implementation manners of the operating mechanism of the circuit breaker of the present invention. The operating mechanism of the circuit breaker of the present invention is not limited to the description of the following embodiments.

[0044] The operating mechanism of the circuit breaker of the present invention includes a handle 1, a connecting rod 2, a jumping fastener 3, a locking fastener 4, a moving contact member 6 and an arc-shaped chute 5 arranged in the housing H of the circuit breaker;

[0045] The handle 1 is pivotally arranged on the housing H, one end protrudes outside the housing H for user operation, and the other end is rotatably connected to the front end 20 of the connecting rod 2 at one end of the connecting rod 2. The rear end of the connecting rod 2 at the other end of the connecting rod 2 is inserted into the kidney-shaped connecting hole 31 arranged on the jumping fastener 3 and is slidably matched with the chute 5. The buckling end 30 at one end of the jumping fastener 3 is buckled and matched with the buckling table 40 at one end of the locking fastener 4. The other end of the jumping fastener 3 is rotatably connected to one end of the moving contact member 6 and forms a jumping buckle rotation center. The locking fastener 4 is pivotally arranged on the housing H. The moving contact member 6 is rotatably arranged on the second rotating shaft 2rs through a kidney-shaped hole 62 arranged in the middle thereof. The other end of the moving contact member 6 is provided with a moving contact 63 for cooperating with the static contact 7.

[0046] Compared with the operating mechanism of the existing circuit breaker, the operating mechanism of the circuit breaker of the present invention omits some components, such as the rotating plate, the overtravel spring, etc., significantly simplifies the structure of the operating mechanism, thereby reducing the installation space occupied by the operating mechanism, which conforms to the development trend of the intellectualization and miniaturization of the circuit breaker.

[0047] Preferably, as Figures 1-5As shown, the locking fastener 4 is pivotally arranged on the housing H through the second rotating shaft 2rs. The locking fastener 4 and the moving contact member 6 are coaxially arranged, which is beneficial to saving the internal space of the circuit breaker and conforming to the miniaturization development trend of the circuit breaker. Of course, the locking fastener 4 can be pivotally arranged on the housing H through another rotating shaft different from the second rotating shaft 2rs.

[0048] Preferably, for the operating mechanism of the circuit breaker of the present invention, during closing, the handle 1 rotates in the closing direction, causing the rear end 21 of the connecting rod to move along the chute 5. At the same time, the rear end 21 of the connecting rod drives the tripping fastener 3, the locking fastener 4, and the moving contact member 6 to rotate synchronously around the second rotating shaft 2rs until the moving contact 63 initially contacts the static contact 7. The handle 1 continues to rotate in the closing direction, driving the moving contact member 6 to swing with the static contact 7 as the fulcrum, and the kidney-shaped hole 62 moves relative to the second rotating shaft 2rs, and the circuit breaker enters the closing state. Further, when the moving contact member 6 swings with the static contact 7 as the fulcrum, the kidney-shaped hole 62 translates relative to the second rotating shaft 2rs.

[0049] Combined with Figures 2-4 As shown, the circuit breaker further includes a moving contact return spring for driving the moving contact member 6 to reset. The other end of the locking fastener 4 is in driving cooperation with the protection mechanism of the circuit breaker. The protection mechanism includes a short-circuit protection mechanism 8a, and of course, it can also include an overload protection mechanism or protection mechanisms with other functions. When a fault occurs, the short-circuit protection mechanism 8a drives the locking fastener 4 to rotate, causing the buckling platform 40 to release the buckling cooperation with the buckling end 30. The moving contact return spring drives the moving contact member 6 to rotate, causing the moving contact 63 to disconnect from the static contact 7, and causing the tripping fastener 3 to rotate around the tripping rotation center, and the circuit breaker enters the tripping state.

[0050] Further, combined with Figures 2-4 As shown, the operating mechanism of the circuit breaker further includes a locking fastener return spring connected to the locking fastener 4 and a handle return spring connected to the handle 1. The locking fastener return spring drives the locking fastener 4 to reset after the circuit breaker trips. The handle return spring drives the handle 1 to rotate in the opening direction. The handle 1 drives the tripping fastener 3 to rotate around the tripping rotation center through the connecting rod 2, causing the buckling end 30 to re-buckle with the buckling platform 40, and the circuit breaker enters the opening state.

[0051] As Figures 1-13 shown, it is an embodiment of the operating mechanism of the circuit breaker of the present invention.

[0052] As Figures 1-5As shown in the figure, the operating mechanism of the circuit breaker of the present invention includes a handle 1, a connecting rod 2, a tripping buckle 3, a locking buckle 4, a moving contact member 6, an arc-shaped sliding groove 5, and a moving contact return spring disposed within the housing H of the circuit breaker; the middle of the handle 1 is pivotally arranged on the housing H, one end protrudes outside the housing H for user operation, and the other end is rotatably connected to the front end 20 of the connecting rod 2 at one end of the connecting rod 2. The rear end 21 of the connecting rod 2 at the other end of the connecting rod 2 is inserted into a kidney-shaped connecting hole 31 provided on the tripping buckle 3 and is slidably engaged with the sliding groove 5. One end of the tripping buckle 3, the buckling end 3, is buckled and cooperated with the buckling table 40 at one end of the locking buckle 4. The other end of the tripping buckle 3 is rotatably connected to one end of the moving contact member 6 to form a tripping rotation center. The middle of the locking buckle 4 is pivotally arranged on the second rotating shaft 2rs, and the second rotating shaft 2rs is fixed to the housing H. The other end of the locking buckle 4 is drivingly cooperated with the short-circuit protection mechanism 8a of the circuit breaker. The moving contact member 6 is rotatably arranged on the second rotating shaft 2rs through a kidney-shaped hole 62 provided in the middle thereof. The other end of the moving contact member 6 is provided with a moving contact 63, which is used in cooperation with a static contact 7 fixed to the housing H; the moving contact return spring is connected to the moving contact member 6. Further, the sliding groove 5 is arranged on the housing H, and the center of the sliding groove 5 is located on the axis of the second rotating shaft 2rs. Further, the free end of the rear end 21 of the connecting rod passes through the kidney-shaped connecting hole 31 and is inserted into the sliding groove 5.

[0053] When the handle 1 rotates in the closing direction, the rear end 21 of the connecting rod moves along the sliding groove 5. At the same time, the rear end 21 of the connecting rod drives the tripping buckle 3, the locking buckle 4, and the moving contact member 6 to rotate synchronously around the second rotating shaft 2rs, and the moving contact member 6 stores energy in the moving contact return spring until the moving contact 63 initially contacts the static contact 7. The handle 1 continues to rotate in the closing direction, driving the moving contact member 6 to swing with the static contact 7 as a fulcrum, and the kidney-shaped hole 62 translates relative to the second rotating shaft 2rs. The moving contact member 6 further stores energy in the moving contact return spring, and the circuit breaker enters the closing state. Further, the combination Figures 2-5 As shown in the figure, when a short-circuit fault occurs, the short-circuit protection mechanism 8a drives the locking buckle 4 to rotate, so that the buckling table 40 releases the buckling cooperation with the buckling end 30. The moving contact return spring releases energy and drives the moving contact member 6 to rotate, so that the moving contact 63 is disconnected from the static contact 7, and the tripping buckle 3 rotates around the tripping rotation center, and the circuit breaker enters the tripping state. Further, the combination Figures 2-5 As shown in the figure, the operating mechanism of the circuit breaker of the present invention further includes a locking buckle return spring connected to the locking buckle 4 and a handle return spring connected to the handle 1. The locking buckle return spring drives the locking buckle 4 to reset after the circuit breaker trips. The handle return spring drives the handle 1 to rotate in the opening direction. The handle 1 drives the tripping buckle 3 to rotate around the tripping rotation center through the connecting rod 2, so that the buckling end 30 and the buckling table 40 are buckled and cooperated again, and the circuit breaker enters the opening state.

[0054] Preferably, as Figure 1As shown, the handle 1 includes an operating arm 10 and a transmission arm 11 that are bent and connected. The connection between the operating arm 10 and the transmission arm 11 is pivotally arranged on the housing H through a first rotating shaft 1rs. Specifically, as Figure 2 shown, the handle 1 includes an operating arm 10 and a rotating disc. One end of the operating arm 10 is connected to the rotating disc. The middle of the rotating disc is pivotally arranged on the housing H through a first rotating shaft 1rs. A handle connection hole is provided at the outer edge of the rotating disc. The part between the first rotating shaft 1rs and the handle connection hole forms the transmission arm 11 of the handle 1.

[0055] Preferably, the moving contact member 6 further includes a tripping indication surface 601 and a closing indication surface 602 provided at one end thereof. An indication hole H01 is provided on the housing H and is matched with the tripping indication surface 601 and the closing indication surface 602. When the circuit breaker is closed, the handle 1 rotates in the closing direction and drives the moving contact member 6 to rotate around the second rotating shaft 2rs through the connecting rod 2, so that the closing indication surface 602 faces the indication hole H01. When the circuit breaker trips or is opened, the moving contact return spring drives the moving contact member 6 to rotate around the second rotating shaft 2rs, so that the tripping indication surface 601 faces the indication hole H01. The operating mechanism of the circuit breaker of the present invention does not require a separate indicating member for indicating the open / closed state of the circuit breaker, further simplifies the structure of the operating mechanism, and reduces the required installation space.

[0056] Specifically, as Figure 2 shown in the direction, the middle of the handle 1 is pivotally arranged on the housing H. Its operating arm 10 protrudes outside the housing H for the user to operate. The handle connection hole is rotatably connected to the front end 20 of the connecting rod at the left end of the connecting rod 2. The rear end 21 of the connecting rod at the right end of the connecting rod 2 is inserted into an oval connection hole 31 provided on the toggle 3 and is slidably matched with the chute 5. The buckle end 30 at the left end of the toggle 3 is buckled and matched with the buckle platform 40 at the upper end of the locking member 4. The right end of the toggle 3 is rotatably connected to the upper end of the moving contact member 6 and forms a toggle rotation center. The middle of the locking member 4 is pivotally arranged on the second rotating shaft 2rs. The second rotating shaft 2rs is fixed to the housing H. The lower end of the locking member 4 is drivingly matched with the short-circuit protection mechanism 8a of the circuit breaker. The moving contact member 6 is rotatably arranged on the second rotating shaft 2rs through an oval hole 62 provided in the middle thereof. A moving contact 63 is provided at the lower end of the moving contact member 6 and is used in cooperation with a static contact 7 fixed to the housing H. The moving contact return spring is connected to the moving contact member 6. The tripping indication surface 601 and the closing indication surface 602 are arranged on the upper end surface of the moving contact member 6, and the indication hole H01 is arranged at the upper end of the housing H. As Figure 2As shown, the circuit breaker is in the open state. The buckling end 30 of the jump fastener 3 is buckled with the buckling platform of the lock fastener 4. The user operates the operating arm 10 to rotate the handle 1 in the closing direction (clockwise rotation). The handle 1 drives the rear end 21 of the connecting rod to move clockwise along the extension direction of the chute 5, and drives the lock jump fastener 3, the lock fastener 4 and the moving contact member 6 to rotate clockwise around the second rotating shaft 2rs synchronously. The position of the rear end 21 of the connecting rod relative to the kidney-shaped connection hole 31 remains unchanged (that is, the distance between the rear end 21 of the connecting rod and the jump fastener connection hole 32 remains unchanged) until the moving contact 63 comes into initial contact with the static contact 7. Then, continue to rotate the handle 1 in the closing direction (clockwise direction), driving the moving contact member 6 to swing clockwise with the static contact 7 as the fulcrum. At this time, the rotation center of the moving contact member 6 changes, so the distance between the rear end 21 of the connecting rod and the jump fastener connection hole 32 changes. The rear end 21 of the connecting rod slides in the kidney-shaped connection hole 31 to adapt to the change in the distance between the rear end 21 of the connecting rod and the jump fastener connection hole 32, and the kidney-shaped hole 62 translates relative to the second rotating shaft 2rs. The moving contact member 6 further stores energy in the moving contact return spring, and the circuit breaker enters the closing state (as Figure 4 shown). At this time, the closing indication surface 602 is opposite to the indication hole H01, indicating the closed state of the moving contact 63 and the static contact 7; as Figure 4 shown, the circuit breaker is in the closed state. When a short-circuit fault occurs, the short-circuit protection mechanism 8a drives the lock fastener 4 to rotate counterclockwise, so that the buckling platform 40 releases the buckling cooperation with the buckling end 30. The moving contact return spring releases energy and drives the moving contact member 6 to rotate counterclockwise, so that the moving contact 63 is disconnected from the static contact 7, and the jump fastener 3 rotates counterclockwise around the jump fastener rotation center, and the circuit breaker enters the tripping state (as Figure 5 shown); after the circuit breaker trips, the lock fastener return spring drives the lock fastener 4 to rotate clockwise around the second rotating shaft 2rs to reset. The handle return spring drives the handle 1 to rotate counterclockwise to the open position O, and the handle 1 drives the jump fastener 3 to rotate clockwise around the jump fastener rotation center through the connecting rod 2, so that the buckling end 30 is re-buckled with the buckling platform 40, and the circuit breaker enters the open state as Figure 2 shown. At this time, the open indication surface 601 is opposite to the indication hole H01, indicating the disconnected state of the moving contact 63 and the static contact 7.

[0057] Preferably, as Figure 14 shown, the lock fastener 4 includes a second linkage part 4546. When a fault occurs, the moving contact return spring drives the moving contact member 6 to rotate, and the moving contact member 6 drives the lock fastener 4 to rotate through the second linkage part 4546, which is beneficial to accelerating the tripping and tripping process of the circuit breaker. Further, as Figure 14 shown, the moving contact member 6 is drivingly engaged with the linkage base part 45 of the second linkage part 4546 to drive the lock fastener 4 to rotate.

[0058] Preferably, as Figure 14As shown, the moving contact member 6 further includes a first linkage portion 6465, and the operating mechanism further includes a tripping linkage shaft (not shown in the figure) connected to the locking member 4; among two adjacent circuit breakers, one is called the front-stage circuit breaker and the other is called the rear-stage circuit breaker. The first linkage portion 6465 of the front-stage circuit breaker is drivingly engaged with the tripping linkage shaft of the rear-stage circuit breaker, and the tripping linkage shaft of the rear-stage circuit breaker is drivingly engaged with the second linkage portion 4546 of the front-stage circuit breaker; when the front-stage circuit breaker trips, its moving contact return spring drives the moving contact member 6 to rotate, the moving contact member 6 drives the first linkage portion 6465 to swing, and the first linkage portion 6465 drives the locking member 4 of the rear-stage circuit breaker to rotate through the tripping linkage shaft of the rear-stage circuit breaker, causing the rear-stage circuit breaker to trip; when the rear-stage circuit breaker trips, its locking linkage shaft drives the locking member 4 of the front-stage circuit breaker to rotate through the second linkage portion 4546 of the front-stage circuit breaker, causing the front-stage circuit breaker to trip. Specifically, as Figure 14 shown, the driving portion 64 of the linkage portion of the first linkage portion 6465 of the front-stage circuit breaker is engaged with the tripping linkage shaft of the rear-stage circuit breaker. The tripping linkage shaft is inserted into the linkage shaft hole 47 of the locking member 4, and the locking linkage shaft of the rear-stage circuit breaker is drivingly engaged with the driven portion 46 of the linkage portion of the second linkage portion 4546 of the front-stage circuit breaker.

[0059] The following describes each component of the operating mechanism of the circuit breaker of the present invention in conjunction with the specification drawings and specific embodiments.

[0060] As Figures 1-3 shown, it is an embodiment of the connecting rod 2.

[0061] As Figures 1-3 shown, the connecting rod 2 has a U-shaped structure, including a connecting rod middle portion 22, a connecting rod front end 20, and a connecting rod rear end 21. The connecting rod front end 20 and the connecting rod rear end 21 are oppositely arranged and are respectively bent and connected to both ends of the connecting rod middle portion 22.

[0062] As Figure 13 shown, it is an embodiment of the tripping buckle 3.

[0063] As Figure 13 shown, the tripping buckle 3 includes a buckling end 30, a waist-shaped connecting hole 31, and a tripping buckle connecting hole 32. The buckling end 30 and the tripping buckle connecting hole 32 are respectively arranged at both ends of the tripping buckle 3, and the waist-shaped connecting hole 31 is located between the buckling end 30 and the tripping buckle connecting hole 32. Further, as Figure 13 shown, the tripping buckle 3 further includes a thick plate portion 3a and a thin plate portion 3b. The thickness of the thick plate portion 3a is greater than that of the thin plate portion 3b. One end of the thin plate portion 3b is provided with the buckling end 30, and the other end is connected to the thick plate portion 3a and is provided with the waist-shaped connecting hole 31 at this end. The tripping buckle connecting hole 32 is arranged on the thick plate portion 3a; one side of the thick plate portion 3a and the thin plate portion 3b is flush with the chute 5, and the other side forms a stepped structure. Further, asFigure 13 As shown, the thin plate portion 3b has a long strip plate structure, one of its long side edges is connected to the thick plate portion 3a, the buckle end 30 is arranged at one end corner of the thin plate portion 3b, and the buckle end 30 is bent and connected to the other long side edge of the thin plate portion 3b; the thick plate portion 3a has a triangular plate structure, one of its side edges is connected to the thin plate portion 3b, and an arc chamfer structure is provided at the vertex angle of the thick plate portion 3a away from the thin plate portion 3b.

[0064] As Figures 7-10 shown, it is an embodiment of the moving contact member 6.

[0065] As Figure 7 and 8 shown, the moving contact member 6 includes a contact support 60 and a moving contact 61. One end of the moving contact 6 is connected to one end of the contact support 60, and a kidney-shaped hole 62 is provided at this end of the contact support 60, and a moving contact point 63 is provided at the other end. Further, as Figure 7 and 8 shown, the contact support 60 further includes a first hinge shaft 603 provided thereon, and the first hinge shaft 603 and the contact support 60 are of an integral structure. Further, as Figures 8-10 shown, the contact support 60 further includes a contact assembly groove 607 provided on one side thereof, and an upper baffle 604 and a lower baffle 605 respectively provided at both ends of the contact assembly groove 607. The kidney-shaped hole 62 is provided on one side of the contact assembly groove 607 and is located between the upper baffle 604 and the lower baffle 605; the moving contact 61 includes a contact limit groove 601, one end of the contact limit groove 601 is assembled into the contact assembly groove 607, the contact limit groove 610 is in limit fit with the side wall of the kidney-shaped hole 62, one end of the side wall of the contact limit groove 610 is clamped between the upper baffle 604 and the contact assembly groove 607, and the middle part of the moving contact 61 is clamped between the lower baffle 605 and the contact assembly groove 607. Further, the contact support 60 further includes a tripping indication surface 601 and a closing indication surface 602 provided at one end thereof.

[0066] Specifically, as Figure 7 and 8 shown, the second rotating shaft 2rs and the contact assembly groove 607 are respectively provided on both sides of the contact support 60. The second rotating shaft 2rs is provided at the upper end of the contact support 60 and is vertically connected thereto. The upper baffle 604 and the lower baffle 605 are respectively provided at the upper and lower ends of the contact assembly groove 607, and the kidney-shaped hole 62 is provided in the middle of one side of the contact assembly groove 607; as Figure 10 shown, the upper end of the moving contact 61 is provided with a contact limit groove 601, the contact limit groove 601 is a semi-circular groove, and the lower end of the moving contact 61 is provided with a moving contact point 63; as Figure 7 shown, the closing indication surface 602 and the tripping indication surface 601 are arranged side by side on the upper end surface of the contact support 60; as Figure 8In the shown direction, when the moving contact member 6 is assembled, the upper end of the moving contact 61 is arranged in the contact assembly groove 607, the contact limiting groove 601 is in limiting cooperation with the side wall of the kidney-shaped hole 62, the upper end of the side wall of the contact limiting groove 601 is clamped between the upper baffle 64 and the contact assembly groove 607, and the left side of the middle part of the moving contact 61 is clamped between the lower baffle 605 and the contact assembly groove 607.

[0067] Preferably, as Figure 7 and 8 shown, the contact support 60 further includes a first linkage part 6465 arranged on one side thereof. The first linkage part 6465 includes a linkage driving part 64 and a linkage connecting plate 65. One end of the linkage driving part 64 is connected to the contact support 60 through the linkage connecting plate 65, and the extending direction of the linkage driving part 64 is perpendicular to the extending direction of the moving contact member 6. Further, the linkage driving part 64 is a long strip-shaped member with a U-shaped cross-section structure, and the free end of the linkage driving part 64 protrudes on the side where the contact assembly groove 607 is located. Specifically, as Figure 7 shown in the direction, the left end of the linkage connecting plate 65 is connected to the contact support 60, and the right end is connected to the front end of the linkage driving part 64, so that the linkage driving part 64 protrudes towards the rear side of the contact support 60.

[0068] As Figure 11 and 12 shown, it is an embodiment of the locking member 4.

[0069] As Figure 11 and 12 shown, the locking member 4 includes a mating arm 41 and a driven part 42. One end of the mating arm 41 is provided with a buckle platform 40, and the other end is connected to one end of the driven part 42. The other end of the driven part 42 is in driving cooperation with the short-circuit protection mechanism 8a; a locking connection hole 43 is provided at the connection between the mating arm 41 and the driven part 42, and the locking member 4 is rotatably arranged on the second rotating shaft 2rs through the locking connection hole 43. Further, as Figure 11 and 12 shown, the locking member 4 further includes a second linkage part 4546. The second linkage part 4546 includes a linkage base part 45 and a linkage driven part 46. One end of the linkage base part 45 is connected to the driven part 42, and the other end protrudes on one side of the driven part 42. The linkage driven part 46 is arranged at the end of the linkage base part 45 far from the driven part 42; the locking member 4 further includes a locking boss 44 arranged at the end of the driven part 42 in cooperation with the short-circuit protection mechanism 8a. The locking boss 44 and the linkage base part 45 are arranged on the same side of the driven part 42 and are respectively located at both ends of the driven arm 42. The mating arm 41, the linkage base part 45 and the locking boss 44 are respectively located at the three vertices of a triangle; when the circuit breaker is assembled, the linkage base part 45 and the locking boss 44 are respectively located on both sides of the moving contact member 6.

[0070] Specifically, as Figure 12 shown in the direction, the base 45 of the linkage part and the locking boss 44 are respectively arranged at the left and right ends of the front side of the driving part 42, and the actuated part 46 of the linkage part is arranged at the upper part of the front end of the base 45 of the linkage part.

[0071] Preferably, as Figure 12 shown, a waist-shaped groove is provided in the middle of the base 45 of the linkage part, and the actuated part 46 of the linkage part protrudes forward from the upper half of the base 45 of the linkage part.

[0072] Preferably, as Figure 12 and 14 shown, the locking part 4 further includes a linkage shaft hole 47, and the linkage shaft hole 47 and the second linkage part 4546 are arranged at the same end of the actuated part 42 and are respectively located on both sides of the actuated part 42.

[0073] As Figure 6 shown, it is an embodiment of the housing H.

[0074] As Figure 6 shown, the housing H includes a base H0 and a cover (not shown in the figure) for cooperative use; the sliding groove 5, the second rotating shaft 2rs, the first rotating shaft 1rs, and the indicating hole H01 are all arranged on the base H0, and the sliding groove 5 is an arc-shaped groove, and its center of the circle is located on the axis of the second rotating shaft 2rs. Preferably, as Figure 6 shown, a base waist-shaped hole 400 is further provided on the bottom wall of the base H0.

[0075] Specifically, as Figure 6 shown in the direction, the first rotating shaft 1rs and the sliding groove 5 are respectively arranged on the left and right sides of the upper end of the base H0, the second rotating shaft 2rs is arranged below the sliding groove 5, the indicating hole HO1 is arranged above the sliding groove 5, and the base waist-shaped hole 400 is arranged on the right side of the sliding groove 5 and the second rotating shaft 2rs and is located between the two.

[0076] As Figure 2 and 3 shown, it is a specific embodiment of the operating mechanism of the circuit breaker of the present invention.

[0077] The handle 1 is rotatably arranged on the first rotating shaft 1rs. The moving contact member 6 and the locking member 4 are sequentially stacked on the base H0 and are both rotatably arranged on the second rotating shaft 2rs. The structure 45 and the locking boss 44 of the locking member 4 are respectively located on both sides of the moving contact member 6. One end of the moving contact member 6 and the jumping member 3 are sequentially arranged on one side of the chute 5. One end of the jumping member 3 is rotatably installed on the first hinge shaft 603 of the moving contact member 6 from the side of the moving contact member 6 away from the base H0. The buckling end 30 at the other end of the jumping member 3 is buckled and matched with the buckling table 40 of the locking member 4. The front end 20 of the connecting rod 2 is inserted into the handle connection hole from the side of the handle 1 away from the base H0, and the rear end 21 of the connecting rod 2 passes through the waist-shaped connection hole 31 of the jumping member 3 from one side of the jumping member 3 and is inserted into the chute 5.

[0078] Specifically, as Figure 2 and 3 shown in the figure, taking the left side, right side, upper side, and lower side of the drawing as the left side, right side, upper side, and lower side of the circuit breaker, and the side of the drawing facing the reader as the front side of the circuit breaker; the moving contact member 6 and the locking member 4 are sequentially stacked on the front side of the base H0 and are both rotatably arranged on the second rotating shaft 2rs. The structure 45 and the locking boss 44 of the locking member 4 are respectively located on the left side and the right side of the moving contact member 6. One end of the moving contact member 6 and the jumping member 3 are sequentially arranged on the front side of the chute 5. The right end of the jumping member 3 is rotatably arranged on the first hinge shaft 603 of the moving contact member 6 from the front side of the moving contact member 6. The buckling end 30 at the left end of the jumping member 3 is buckled and matched with the buckling table 40 at the upper end of the locking member 4. The front end 20 of the connecting rod is inserted into its handle connection hole from the front side of the handle 1, and the rear end 21 of the connecting rod is inserted into the waist-shaped connection hole 31 of the jumping member 3 from the front side of the jumping member 3 and passes through the waist-shaped connection hole 31 and is inserted into the chute 5.

[0079] For the operating mechanism of the circuit breaker of the present invention, the layout of its various components is reasonable, the connection relationship between the components is simple, and it can be completed only by operations such as stacking, plugging, and buckling, which is convenient for the mechanized and large-scale production of the circuit breaker.

[0080] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An operating mechanism of a circuit breaker, characterized in that: It includes a handle (1), a connecting rod (2), a tripping fastener (3), a locking fastener (4), a moving contact member (6) and an arc-shaped sliding groove (5) arranged in the housing (H) of the circuit breaker; The handle (1) is pivotally arranged on the housing (H), one end protrudes outside the housing (H) for user operation, and the other end is rotatably connected to the front end (20) of the connecting rod of the connecting rod (2). The rear end (21) of the connecting rod (2) is inserted into a kidney-shaped connecting hole (31) arranged on the tripping fastener (3) and is in sliding cooperation with the sliding groove (5). One end of the tripping fastener (3), the buckling end (30), is in buckling cooperation with the buckling table (40) of the locking fastener (4). The other end of the tripping fastener (3) is rotatably connected to one end of the moving contact member (6) to form a tripping rotation center. The locking fastener (4) is pivotally arranged on the housing (H). The moving contact member (6) is rotatably arranged on the second rotating shaft (2rs) through a kidney-shaped hole (62) arranged in the middle thereof. The other end of the moving contact member (6) is provided with a moving contact (63) for cooperating with a static contact (7).

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The sliding groove (5) is arranged on the housing (H). The sliding groove (5) is circular arc-shaped, and the center of the sliding groove (5) is located on the axis of the second rotating shaft (2rs); the locking fastener (4) is pivotally arranged on the housing (H) through the second rotating shaft (2rs).

3. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The free end of the rear end (21) of the connecting rod is inserted into the sliding groove (5) after passing through the kidney-shaped connecting hole (31).

4. The operating mechanism of the circuit breaker according to claim 1, characterized in that: When the handle (1) rotates in the closing direction, the rear end (21) of the connecting rod moves along the sliding groove (5). At the same time, the rear end (21) of the connecting rod drives the tripping fastener (3), the locking fastener (4), and the moving contact member (6) to rotate synchronously around the second rotating shaft (2rs) until the moving contact (63) is initially in contact with the static contact (7). The handle (1) continues to rotate in the closing direction, driving the moving contact member (6) to swing with the static contact (7) as a fulcrum, and the kidney-shaped hole (62) moves relative to the second rotating shaft (2rs), and the circuit breaker enters the closing state.

5. The operating mechanism of the circuit breaker according to claim 4, characterized in that: It further includes a moving contact return spring for driving the moving contact member (6) to reset. The locking fastener (4) is also in driving cooperation with the protection mechanism of the circuit breaker; When a fault occurs, the protection mechanism drives the locking fastener (4) to rotate, so that the buckling cooperation between the buckling table (40) and the buckling end (30) is released. The moving contact return spring releases energy to drive the moving contact member (6) to rotate, so that the moving contact (63) is disconnected from the static contact (7), and the tripping fastener (3) rotates around the tripping rotation center, and the circuit breaker enters the tripping state.

6. The operating mechanism of the circuit breaker according to claim 5, characterized in that: It further includes a locking fastener return spring connected to the locking fastener (4) and a handle return spring connected to the handle (1). The locking fastener return spring drives the locking fastener (4) to reset after the circuit breaker trips. The handle return spring drives the handle (1) to rotate in the opening direction. The handle (1) drives the tripping fastener (3) to rotate around the tripping rotation center through the connecting rod (2), so that the buckling end (30) and the buckling table (40) are buckled again, and the circuit breaker enters the opening state.

7. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The connecting rod (2) is of a U-shaped structure and includes a connecting rod middle part (22), a connecting rod front end (20) and a connecting rod rear end (21). The connecting rod front end (20) and the connecting rod rear end (21) are oppositely arranged and are respectively bent and connected to both ends of the connecting rod middle part (22).

8. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The trip fastener (3) is rotatably connected to the moving contact member (6) through a first hinge shaft (603); the trip fastener (3) further includes a trip fastener connection hole (32), a buckle end (30) and the trip fastener connection hole (32) are respectively arranged at both ends of the trip fastener (3), and the kidney-shaped connection hole (31) is located between the buckle end (30) and the trip fastener connection hole (32). The trip fastener (3) is rotatably arranged on the first hinge shaft (603) through the trip fastener connection hole (32).

9. The operating mechanism of the circuit breaker according to claim 8, characterized in that: The trip fastener (3) includes a thick plate part (3a) and a thin plate part (3b). The thickness of the thick plate part (3a) is greater than that of the thin plate part (3b). One end of the thin plate part (3b) is provided with a buckle end (30), and the other end is connected to the thick plate part (3a) and is provided with a kidney-shaped connection hole (31) at this end. The trip fastener connection hole (32) is arranged on the thick plate part (3a); the thick plate part (3a) and the thin plate part (3b) are flush on one side and form a stepped structure on the other side. The connecting rod rear end (21) of the connecting rod (2) is inserted into the kidney-shaped connection hole (31) from one side of the stepped structure.

10. The operating mechanism of the circuit breaker according to claim 9, characterized in that: One side of the thick plate part (3a) and the thin plate part (3b) is flush and this side faces the chute (5), and the other side forms a stepped structure.

11. The operating mechanism of the circuit breaker according to claim 5, characterized in that: The locking fastener (4) includes a second linkage part (4546). When a failure occurs, the moving contact return spring drives the moving contact member (6) to rotate, and the moving contact member (6) drives the locking fastener (4) to rotate through the second linkage part (4546).

12. The operating mechanism of the circuit breaker according to claim 11, characterized in that: The moving contact member (6) further includes a first linkage part (6465). The operating mechanism further includes a tripping linkage shaft connected to the locking fastener 4; among two adjacent circuit breakers, one is called the front-stage circuit breaker and the other is called the rear-stage circuit breaker. The first linkage part (6465) of the front-stage circuit breaker is in driving cooperation with the tripping linkage shaft of the rear-stage circuit breaker, and the tripping linkage shaft of the rear-stage circuit breaker is in driving cooperation with the second linkage part (4546) of the front-stage circuit breaker; when the front-stage circuit breaker trips, its moving contact return spring drives the moving contact member (6) to rotate, the moving contact member (6) drives the first linkage part (6465) to swing, and the first linkage part (6465) drives the locking fastener (4) of the rear-stage circuit breaker to rotate through the tripping linkage shaft of the rear-stage circuit breaker, so that the rear-stage circuit breaker trips; when the rear-stage circuit breaker trips, its locking linkage shaft drives the locking fastener (4) of the front-stage circuit breaker to rotate through the second linkage part (4546) of the front-stage circuit breaker, so that the front-stage circuit breaker trips.

13. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The moving contact member (6) includes a contact support (60) and a moving contact (61). One end of the moving contact (61) is connected to one end of the contact support (60), and a kidney-shaped hole (62) is provided at this end of the contact support (60). The other end is provided with a moving contact point (63), and the other end of the contact support (60) is rotatably connected to the trip fastener (3).

14. The operating mechanism of the circuit breaker according to claim 13, characterized in that: The contact support (60) further includes a first hinge shaft (603) disposed thereon. The first hinge shaft (603) and the contact support (60) are of an integral structure. The contact support (60) is rotatably connected to the toggle fastener (3) through the first hinge shaft (603).

15. The operating mechanism of the circuit breaker according to claim 13, characterized in that: The contact support (60) further includes a contact assembly groove (607) disposed on one side thereof, and an upper baffle (604) and a lower baffle (605) respectively disposed at both ends of the contact assembly groove (607). A kidney-shaped hole (62) is disposed on one side of the contact assembly groove (607) and between the upper baffle (604) and the lower baffle (605); the moving contact (61) includes a contact limiting groove (610), and the contact limiting groove (610) and the moving contact point (63) are respectively disposed at both ends of the moving contact (61); one end of the moving contact (61) is assembled into the contact assembly groove (607), the contact limiting groove (610) is in limiting cooperation with the side wall of the kidney-shaped hole (62), one end of the side wall of the contact limiting groove (610) is clamped between the upper baffle (604) and the contact assembly groove (607), and the middle part of the moving contact (61) is clamped between the lower baffle (605) and the contact assembly groove (607).

16. The operating mechanism of the circuit breaker according to claim 13, characterized in that: The contact support (60) further includes a tripping indication surface (601) and a closing indication surface (602) disposed at one end thereof. An indication hole (H01) cooperating with the tripping indication surface (601) and the closing indication surface (602) is provided on the housing (H); when the circuit breaker is closed, the handle (1) rotates in the closing direction and drives the moving contact member (6) to rotate around the second rotating shaft (2rs) through the connecting rod (2), so that the closing indication surface (602) is opposite to the indication hole (H01); when the circuit breaker trips or is tripped, the moving contact return spring drives the moving contact member (6) to rotate around the second rotating shaft (2rs), so that the tripping indication surface (601) is opposite to the indication hole (H01).

17. The operating mechanism of the circuit breaker according to claim 13, characterized in that: The contact support (60) further includes a first linkage portion (6465) disposed on one side thereof. The first linkage portion (6465) includes a linkage portion connecting plate (65) and a linkage portion driving portion (64). One end of the linkage portion driving portion (64) is connected to the contact support (60) through the linkage portion connecting plate (65), and the extending direction of the linkage portion driving portion (64) is perpendicular to the extending direction of the moving contact member (6).

18. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The locking fastener (4) includes a mating arm (41) and a driven portion (42). A buckle platform (40) is provided at one end of the mating arm (41), and the other end of the mating arm (41) is connected to one end of the driven portion (42). The other end of the driven portion (42) is in driving cooperation with the short-circuit protection mechanism (8a); a locking connection hole (43) is provided at the connection between the mating arm (41) and the driven portion (42). The locking fastener (4) is rotatably disposed on the second rotating shaft (2rs) through the locking connection hole (43).

19. The operating mechanism of the circuit breaker according to claim 18, characterized in that: The lock fastener (4) further includes a second linkage part (4546). The second linkage part (4546) includes a linkage part base (45) and a driven part (46) of the linkage part. One end of the linkage part base (45) is connected to the driven part (42), and the other end protrudes to one side of the driven part (42). The driven part (46) of the linkage part is arranged at the end of the linkage part base (45) far from the driven part (42); the lock fastener (4) further includes a lock lug (44) arranged at one end of the driven part (42) cooperating with the short-circuit protection mechanism (8a). The lock lug (44) and the structure (45) are arranged on the same side of the driven part (42) and are respectively located at both ends of the driven part (42). The mating arm (41), the linkage part base (45), and the lock lug (44) are respectively located at the three vertices of a triangle; during assembly, the linkage part base (45) and the lock lug (44) are respectively located on both sides of the moving contact member (6).

20. The protection mechanism of the circuit breaker according to claim 1, characterized in that: The housing (H) includes a base (H0) and a cover for cooperative use; the chute (5) and the second rotating shaft (2rs) are both arranged on the base (H0); the moving contact member (6) and the lock fastener (4) are sequentially stacked on the base (H0) and are both rotatably arranged on the second rotating shaft (2rs); one end of the moving contact member (6) and the jumping fastener (3) are sequentially arranged on one side of the chute (5). One end of the jumping fastener (3) is rotatably mounted on the first hinge shaft (603) of the moving contact member (6) from the side of the moving contact member (6) far from the base (H0). The buckling end (30) at the other end of the jumping fastener (3) is buckled and cooperated with the buckling table (40) of the lock fastener (4); the rear end (21) of the connecting rod of the connecting rod (2) passes through the jumping fastener (3) from one side of the jumping fastener (3) and is inserted into the chute (5).

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