Circuit breaker manual operating mechanism

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a manual operating mechanism for a circuit breaker, comprising a rotary handle, a housing, and an interlocking rod, a linkage plate assembly, a transmission rod, and a spring, each of which is respectively arranged in the housing; the linkage plate assembly comprises a linkage plate, the rotary handle is rotatably arranged on the housing and is driveably connected to the linkage plate, and the rotary handle and the linkage plate assembly rotate synchronously; the interlocking rod is pivotally arranged on the housing and is driveably engaged with the linkage plate; the transmission rod is pivotally arranged on the housing, one end of which is driveably connected to the interlocking rod and the other end is connected to one end of a spring, and the other end of the spring is limitably engaged with the housing; the interlocking rod switches between a first position and a second position by reciprocating swinging, and the spring applies a first force F1 and a second force F2 to the transmission rod, respectively, so that the transmission rod maintains the interlocking rod in the first position and the second position, respectively; the manual operating mechanism for a circuit breaker of the present invention has a simple structure and good operating reliability.

Description

Technical Field

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

[0002] The domestic small three-box market has been on an upward trend. More and more fields, such as civil / commercial buildings, machinery, rail transportation, factory buildings, etc., require matching distribution boxes for power distribution protection.

[0003] With the improvement of users' safety awareness, manual operation of small distribution cabinets with side opening doors is appearing more and more frequently on the market, and has gradually become one of the major categories of small three-boxes; moreover, many distribution product projects have clear requirements for the box design, such as the box must be designed with a side opening door, and the molded case circuit breaker must be equipped with a special manual operation mechanism.

[0004] However, the existing manual operating mechanisms of circuit breakers often have the following deficiencies:

[0005] 1. The structure of the existing manual operating mechanism of the circuit breaker is complex, and the positioning of the interlocking rod is unstable and unreliable;

[0006] Second, the existing manual operation mechanism of the circuit breaker is only suitable for drawer cabinets and cannot be used in small three-box cabinets or other side-opening cabinets;

[0007] 3. The existing manual operating mechanism of the circuit breaker cannot be used when the cabinet door is open or closed at the same time. Summary of the Invention

[0008] The object of the present invention is to overcome the defects of the prior art and provide a manual operating mechanism for a circuit breaker, which has a simple structure and good working reliability.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A manual operating mechanism for a circuit breaker includes a rotary handle 10, a housing 5, and an interlocking rod 4, a linkage plate assembly 613, a transmission rod 1, and a spring 9, respectively arranged in the housing 5; the linkage plate assembly 613 includes a linkage plate 6, the rotary handle 10 is rotatably arranged on the housing 5 and is driven and connected to the linkage plate 6, and the rotary handle 10 and the linkage plate assembly 613 rotate synchronously; the interlocking rod 4 is pivotally arranged on the housing 5 and is driven and engaged with the linkage plate 6; the transmission rod 1 is pivotally arranged on the housing 5, one end of which is driven and connected to the interlocking rod 4, and the other end is connected to one end of the spring 9, and the other end of the spring 9 is limited and engaged with the housing 5; the interlocking rod 4 switches between a first position and a second position by reciprocating swinging, and the spring 9 applies a first force F1 and a second force F2 to the transmission rod 1, respectively, so that the transmission rod 1 keeps the interlocking rod 4 in the first position and the second position, respectively.

[0011] Preferably, the spring 9 is a tension spring, and the first force F1 and the second force F2 are both tension forces; when the interlocking rod 4 is in the first position, the rotation center of the transmission rod 1 is located on one side of the axis of the spring 9; when the interlocking rod 4 is in the second position, the rotation center of the transmission rod 1 is located on the other side of the axis of the spring 9.

[0012] Preferably, the transmission rod 1 includes a transmission rod strip hole 11a arranged at one end thereof, the interlocking rod 4 includes an interlocking rod actuated shaft 4a, the length of the transmission rod strip hole 11a is greater than the outer diameter of the interlocking rod actuated shaft 4a, and the interlocking rod actuated shaft 4a is inserted into the transmission rod strip hole 11a.

[0013] Preferably, when the interlocking rod 4 is in the first position, the interlocking rod driven shaft 4a is located on one side of the axis of the spring 9; when the interlocking rod 4 is in the second position, the interlocking rod driven shaft 4a is located on the other side of the axis of the spring 9.

[0014] Preferably, the interlocking rod 4 is a Y-shaped structure, including an interlocking rod first arm 4b, an interlocking rod second arm 4c and an interlocking rod third arm 4d. The free end of the interlocking rod first arm 4b is locked with the linkage plate 6, and the interlocking rod third arm 4d is provided with an interlocking rod driven shaft 4a. The free end of the interlocking rod second arm 4c passes through the outer shell 5 and protrudes outside the outer shell 5.

[0015] Preferably, a third arm avoidance groove for avoiding the rotation axis of the transmission rod 1 is provided in the middle of the third arm 4d of the interlocking rod, and the interlocking rod driven shaft 4a is arranged on one side of the free end of the third arm 4d of the interlocking rod.

[0016] Preferably, the interlocking rod 4 is in the first position and is locked with the linkage plate 6 to prevent the rotating handle 10 from rotating in the first direction; when the interlocking rod 4 is in the second position, the rotating handle 10 rotates in the first direction, and the interlocking rod 4 is driven to rotate toward the first position through the linkage plate 6, so that the interlocking rod 4 switches to the first position.

[0017] Preferably, when the interlocking rod 4 is in the second position, the rotating handle 10 rotates in the first direction, and the rotating handle 10 drives the interlocking rod 4 to rotate to the first position through the linkage plate 6 and passes the critical position, and the interlocking rod 4 automatically rotates to the first position.

[0018] Preferably, the manual operating mechanism of the circuit breaker also includes a driving member, which is installed on the cabinet door 18 of the circuit breaker assembly cabinet for assembling the circuit breaker, and the driving member moves synchronously with the cabinet door 18; when the interlock rod 4 is in the second position, the circuit breaker is in the open state and the cabinet door 18 is in the closed state, the cabinet door 18 is opened, and the driving member drives the interlock rod 4 to rotate toward the first position, so that the interlock rod 4 switches to the first position and locks with the linkage plate 6. At this time, the cabinet door 18 is closed, and the driving member drives the interlock rod 4 to rotate in the direction of the second position to the third position, so that the interlock rod 4 and the linkage plate 6 are released from the lock and the interlock rod 4 is limited by the driving member to prevent the cabinet door 18 from opening.

[0019] Preferably, the interlocking rod 4 includes an interlocking rod curved surface 4f, and the linkage plate 6 includes a linkage plate driving end 6c. The linkage plate driving end 6c cooperates with the interlocking rod curved surface 4f to drive the interlocking rod 4 to swing back and forth.

[0020] Preferably, the interlocking rod 4 includes an interlocking rod locking end 40b, and the linkage plate 6 includes a linkage plate locking platform 60a. The interlocking rod locking end 40b and the linkage plate locking platform 60a are locked and matched to prevent the rotary handle 10 from rotating in the first direction.

[0021] Preferably, the linkage plate 6 also includes a small diameter side wall 61a and a large diameter side wall 62a arranged in sequence along its circumference, the outer diameter of the small diameter side wall 61a is smaller than the outer diameter of the large diameter side wall 62a, and the connection between the small diameter side wall 61a and the large diameter side wall 62a forms a linkage plate locking platform 60a; when the interlocking rod 4 is locked with the linkage plate 6, the interlocking rod locking end 40b is opposite to the small diameter side wall 61a and is limitedly engaged with the linkage plate locking platform 60a.

[0022] Preferably, the small-diameter sidewall 61 a and the large-diameter sidewall 62 a are both arc-shaped sidewalls, and the radius of the small-diameter sidewall 61 a is smaller than the radius of the large-diameter sidewall 62 a .

[0023] Preferably, the linkage plate driving end 6 c , the small-diameter side wall 61 a , the linkage plate locking platform 60 a and the large-diameter side wall 62 a of the linkage plate 6 are sequentially arranged on the circumference of the linkage plate 6 .

[0024] Preferably, the housing 5 further includes a housing opening 5a for the interlocking rod 4 to pass through and to limit the swing stroke of the interlocking rod 4. After passing through the housing opening 5a, the end of the interlocking rod 4 protruding outside the housing 5 cooperates with the driving member.

[0025] Preferably, the driving member includes a locking driving arm 19 and an unlocking driving arm 20 arranged relative to each other, and the interlocking rod 4 is located between the locking driving arm 19 and the unlocking driving arm 20; when the interlocking rod 4 is in the second position, the circuit breaker is in the open state and the cabinet door 18 is in the closed state, the cabinet door 18 is opened, and the locking driving arm 19 drives the interlocking rod 4 to rotate past the critical position, and the interlocking rod 4 rotates to the first position and locks with the linkage plate 6 to prevent the rotating handle 10 from rotating in the first direction. At this time, the cabinet door 18 is closed, and the unlocking driving arm 20 drives the interlocking rod 4 to rotate in the direction of the second position to the third position, so that the interlocking rod 4 is unlocked from the linkage plate 6 and the unlocking driving arm 20 is limited by the interlocking rod 4 to prevent the cabinet door 18 from being opened.

[0026] Preferably, the locking drive arm 19 includes a first driving bevel 19a. When the cabinet door 18 is opened, the moving direction of the first driving bevel 19a is perpendicular to the rotation direction of the interlocking rod 4. The unlocking drive arm 20 includes a second driving bevel 20a and an unlocking drive arm hook 20b. When the cabinet door 18 is closed, the moving direction of the second driving bevel 20a is perpendicular to the rotation direction of the interlocking rod 4. After the cabinet door 18 is closed, the unlocking drive arm hook 20b is limitedly engaged with the interlocking rod 4 to prevent the cabinet door 18 from opening.

[0027] Preferably, the manual operating mechanism of the circuit breaker further includes a knob 17, which is rotatably arranged on the housing 5. One end of the knob 17 is a knob operating end, which is located on one side of the rotary handle 10, and the other end of the knob 17 is drive-connected to the interlocking rod 4; turning the knob operating end drives the interlocking rod 4 to rotate.

[0028] The manual operating mechanism of the circuit breaker of the present invention cooperates with the spring 9 and the transmission rod 1 to keep the interlocking rod 4 in the first position and the second position respectively. The structure is simple and the operation is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1A This is a schematic structural diagram of the manual operating mechanism of the circuit breaker of the present invention, wherein the interlocking rod cooperates with the unlocking arm of the driving member to release the locking cooperation between the interlocking rod and the linkage plate;

[0030] Figure 1B It is a schematic structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the cooperation relationship between the interlocking rod and the unlocking arm of the driving member;

[0031] Figure 2A Schematic diagram of the structure of the manual operating mechanism of the circuit breaker of the present invention, wherein the interlocking rod is in the second position;

[0032] Figure 2B It is a schematic structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the positional relationship between the interlocking rod and the locking arm of the driving member;

[0033] Figure 3Schematic diagram of the structure of the manual operating mechanism of the circuit breaker of the present invention, wherein the interlocking rod is located in the first position and locked with the linkage plate;

[0034] Figure 4 3D schematic diagram of the manual operating mechanism of the circuit breaker of the present invention, wherein the locking end of the interlocking rod is opposite to the large-diameter side wall of the linkage plate;

[0035] Figure 5 1 is a schematic structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the handle, the knob and the housing opening;

[0036] Figure 6 It is a structural schematic diagram of the interlocking rod of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the transmission rod of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the linkage plate assembly of the present invention;

[0039] Figure 9 It is a structural schematic diagram of the linkage plate of the present invention;

[0040] Figure 10 It is a structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the assembly relationship between the driving component and the linkage plate assembly;

[0041] Figure 11 It is a three-dimensional structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the assembly relationship between the driving component and the linkage plate assembly. DETAILED DESCRIPTION

[0042] The following further describes the specific implementation of the circuit breaker manual operating mechanism of the present invention in conjunction with the embodiments shown in Figures 1 to 11. The circuit breaker manual operating mechanism of the present invention is not limited to the description of the following embodiments.

[0043] like Figure 1A-4As shown in Figures 10-11, the manual operating mechanism of a circuit breaker of the present invention includes a rotary handle 10, a housing 5, and an interlocking rod 4, a linkage plate assembly 613, a transmission rod 1, and a spring 9, which are respectively arranged in the housing 5. The linkage plate assembly 613 includes a linkage plate 6. The rotary handle 10 is rotatably arranged on the housing 5 and is driven by the linkage plate 6. The rotary handle 10 and the linkage plate assembly 613 rotate synchronously. The interlocking rod 4 is pivotally arranged on the housing 5 and is driven by the linkage plate 6. The transmission rod 1 is pivotally arranged on the housing 5, one end of which is driven by the interlocking rod 4 and the other end is connected to one end of the spring 9. The other end of the spring 9 is limited by the housing 5. The interlocking rod 4 switches between the first position and the second position by reciprocating swinging. The spring 9 applies a first force F1 and a second force F2 to the transmission rod 1, respectively. The transmission rod 1 keeps the interlocking rod 4 in the first position and the second position, respectively. The rotating axes of the rotary handle 10, the linkage plate 6, and the interlocking rod 4 are parallel.

[0044] The manual operating mechanism of the circuit breaker of the present invention cooperates with the spring 9 and the transmission rod 1 to keep the interlocking rod 4 in the first position and the second position respectively. The structure is simple and the operation is reliable.

[0045] Preferably, Figure 1A-4 As shown, the spring 9 is a tension spring, and the first force F1 and the second force F2 are both tension forces; Figure 3 As shown, when the interlocking rod 4 is in the first position, the rotation center of the transmission rod 1 is located on one side of the axis of the spring 9; Figure 2A As shown, when the interlocking rod 4 is in the second position, the rotation center of the transmission rod 1 is located on the other side of the axis of the spring 9. Of course, the spring 9 is not limited to a tension spring, but can also be a compression spring, which applies a thrust to the transmission rod 1 that is the same as the first force F1 and the second force F2 (same direction and magnitude), and can also play the role of maintaining the interlocking rod 4 in the first and second positions respectively; when the spring 9 is a compression spring, its implementation method is conventionally achieved by those skilled in the art and will not be further described here.

[0046] Preferably, Figure 1A-4 As shown, the transmission rod 1 includes a transmission rod strip hole 11a provided at one end thereof, and the interlocking rod 4 includes an interlocking rod actuated shaft 4a. The length of the transmission rod strip hole 11a is greater than the outer diameter of the interlocking rod actuated shaft 4a, and the interlocking rod actuated shaft 4a is inserted into the transmission rod strip hole 11a. When the interlocking rod 4 swings, the interlocking rod actuated shaft 4a moves back and forth relative to the transmission rod strip hole 11a. Of course, as a form of transformation, the positions of the transmission rod strip hole 11a and the interlocking rod actuated shaft 4a can be interchanged, which can also play the same role and should also fall within the scope of protection of the present invention. Further, as Figure 1A-4As shown, when the interlocking rod 4 is in the first position, the interlocking rod driven shaft 4a is located on one side of the axis of the spring 9; when the interlocking rod 4 is in the second position, the interlocking rod driven shaft 4a is located on the other side of the axis of the spring 9.

[0047] Preferably, Figure 3 As shown, the interlocking rod 4 is located in the first position and locked with the linkage plate 6, preventing the rotary handle 10 from rotating in the first direction; Figure 2A As shown, when the interlocking rod 4 is in the second position, the rotary handle 10 is rotated in the first direction, and the rotary handle 10 drives the interlocking rod 4 to rotate toward the first position through the linkage plate 6, so that the interlocking rod 4 switches to the first position and locks with the linkage plate 6, entering Figure 3 Status shown. Figure 2A As shown, when the interlocking lever 4 is in the second position, the rotary handle 10 is rotated in the first direction. The rotary handle 10 drives the interlocking lever 4 to the first position via the linkage plate 6. After the interlocking lever 4 passes the critical position, the interlocking lever 4 automatically returns to the first position and locks with the linkage plate 6. It should be noted that the "critical position" is the position of the interlocking lever 4 when the axis of the spring 9 coincides with the rotation center of the transmission rod 1. At this time, the spring 9 is in a state of maximum energy storage.

[0048] Preferably, Figures 1A-2B As shown, the manual operating mechanism of the circuit breaker further includes a driving member, which is mounted on a cabinet door 18 of a circuit breaker assembly cabinet for assembling the circuit breaker, and the driving member moves synchronously with the cabinet door 18; Figure 2A and 2B As shown, when the interlocking rod 4 is in the second position, the circuit breaker is in the open state and the cabinet door 18 is in the closed state, the cabinet door 18 is opened, and the driving member drives the interlocking rod 4 to rotate toward the first position, so that the interlocking rod 4 switches to the first position and locks with the linkage plate 6, entering Figure 3 In the state shown, the cabinet door 18 is closed at this time, and the driving member drives the interlocking rod 4 to rotate in the direction of the second position to the third position, so that the interlocking rod 4 and the linkage plate 6 are unlocked and the interlocking rod 4 and the driving member limit cooperate to prevent the cabinet door 18 from opening, and enter Figure 1A and 1B Further, as Figure 1A As shown, when the interlocking rod 4 is in the third position and the cabinet door 18 is in the closed state, the rotary handle 10 is rotated in the second direction, and the interlocking rod 4 is driven to rotate in the direction of the second position through the linkage plate 6, so that the interlocking rod 4 is rotated to the second position; Figure 3 As shown, when the interlocking rod 4 is in the first position and the cabinet door 18 is in the open state, the rotary handle 10 rotates in the second direction, and the interlocking rod 4 rotates in the direction of the second position through the linkage plate 6, so that the interlocking rod 4 rotates to the second position.

[0049] Preferably, a handle avoidance hole for avoiding the rotating handle 10 is provided in the middle of the cabinet door 18.

[0050] The manual operating mechanism of the circuit breaker of the present invention can also achieve the following technical effects:

[0051] First, the rotary handle 10 is rotatably mounted on the housing 5 and does not move with the opening or closing of the cabinet door 18. The manual operating mechanism of the circuit breaker can be operated by rotating the handle 10 regardless of whether the cabinet door 18 is in the open or closed state.

[0052] Second, the coordination of the interlocking rod 4, linkage plate 6, transmission rod 1, spring 9 and other structures makes the circuit breaker manual operating mechanism of the present invention applicable not only to drawer cabinets, but also to small three-box cabinets and other side-opening door boxes. Figure 8-11 As shown, the manual operating mechanism of the circuit breaker of the present invention further includes a driving component 11 disposed within the housing 5 for drivingly cooperating with the circuit breaker handle; the linkage plate assembly 613 further includes a transmission block 13 and a transmission shaft 12 disposed on the linkage plate 6, the transmission block 13 including a track groove 13a disposed along its axial direction and used to guide and limit the transmission shaft 12, with one end of the transmission shaft 12 inserted into the track groove 13a; one end of the driving component 11 is pivotally disposed on the housing 5, and the other end is drivingly connected to the other end of the transmission shaft 12. The manual operating mechanism of the circuit breaker of the present invention achieves a driving connection between the linkage plate assembly 613 and the driving component 11 through the cooperation of the linkage plate 6, the transmission block 13, and the transmission shaft 12, thereby ensuring the reliability of the connection between the linkage plate assembly 613 and the driving component 11 and the reliability of the setting of the transmission shaft 12, thereby preventing the transmission shaft 12 from deviating from its position and causing transmission failure.

[0053] The manual operating mechanism of the circuit breaker of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0054] like Figure 1A-11 FIG. 1 shows an embodiment of the manual operating mechanism of a circuit breaker according to the present invention.

[0055] like Figure 1A-4As shown in Figures 10-11, the manual operating mechanism of the circuit breaker of the present invention includes a rotary handle 10, a housing 5, and an interlocking rod 4, a linkage plate assembly 613, a transmission rod 1, a spring 9 and a driving component 11 for cooperating with the circuit breaker handle respectively arranged in the housing 5; the linkage plate assembly 613 includes a linkage plate 6, the rotary handle 10 is rotatably set on the housing 5 and is driven and connected to the linkage plate 6, and the rotary handle 10 rotates synchronously with the housing 5; the interlocking rod 4 is pivotally set on the housing 5 and is driven and coordinated with the linkage plate 6; the transmission rod 1 is pivotally set on the housing 5, one end of which is driven and connected to the interlocking rod 4, and the other end is connected to one end of the spring 9, and the other end of the spring 9 is limited and coordinated with the housing 5; one end of the driving component 11 is pivotally set on the housing 5, and the other end is driven and connected to the linkage plate assembly 613.

[0056] It should be pointed out that Figure 1A-4 As shown in Figures 10-11, the manual operating mechanism of the circuit breaker of the present invention, in actual use, the rotating handle 10 drives the circuit breaker handle to swing through the linkage plate assembly 613 and the driving component 11, so that the circuit breaker completes the closing / opening operation.

[0057] Preferably, Figure 1A-3 As shown, the interlocking rod 4 switches between the first position and the second position by reciprocating swing, and the spring 9 applies a first force F1 and a second force F2 to the transmission rod 1, respectively, so that the transmission rod 1 keeps the interlocking rod 4 in the first position and the second position, respectively. Further, as shown in Figures 1-4, the spring 9 is a tension spring, and the first force F1 and the second force F2 are both tension forces; Figure 3 As shown, when the interlocking rod 4 is in the first position, the rotation center of the transmission rod 1 is located on one side of the axis of the spring 9; as shown in Figure 2, when the interlocking rod 4 is in the second position, the rotation center of the transmission rod 1 is located on the other side of the axis of the spring 9.

[0058] Specifically, such as Figure 3 As shown, when the interlocking rod 4 is in the first position, the rotation center of the transmission rod 1 is located on the left side of the axis of the spring 9; as shown in Figure 2, when the interlocking rod 4 is in the second position, the rotation center of the transmission rod 1 is located on the right side of the axis of the spring 9.

[0059] Preferably, Figure 1A-4 As shown in FIG. 7 , the transmission rod 1 includes a transmission rod strip hole 11a provided at one end thereof, and the interlocking rod 4 includes an interlocking rod actuated shaft 4a. The length of the transmission rod strip hole 11a is greater than the outer diameter of the interlocking rod actuated shaft 4a, and the interlocking rod actuated shaft 4a is inserted into the transmission rod strip hole 11a. Further, as Figure 3 As shown, when the interlocking rod 4 is in the first position, the interlocking rod driven shaft 4a is located on one side of the axis of the spring 9; Figure 2AAs shown, when the interlocking rod 4 is in the second position, the interlocking rod driven shaft 4a is located on the other side of the axis of the spring 9. Specifically, as Figure 1A-4 In the direction shown, the middle portion of the transmission rod 1 is pivotally arranged on the housing 5 , a transmission rod strip hole 11 a is provided at the lower end, and the upper end is connected to the upper end of the spring 9 .

[0060] Preferably, Figure 7 Figure 1 shows an embodiment of the transmission rod 1. The transmission rod 1 comprises a transmission rod main plate 1a and a transmission rod connecting plate 1b. A transmission rod shaft hole 10a is defined in the center of the main plate 1a. One end of the main plate 1a has a transmission rod strip hole 11a, and the other end is connected at a right angle to one end of the transmission rod connecting plate 1b. The other end of the transmission rod connecting plate has a spring groove 10b. Furthermore, the transmission rod 1 is pivotally mounted on the housing 5 via a transmission rod shaft 2, which passes through the transmission rod shaft hole 10a and connects to the housing 5.

[0061] Preferably, Figure 1A-4 As shown, one end of the spring 9 is limitedly engaged with the spring hanging groove 10b of the transmission rod 1, and the other end is limitedly engaged with the housing 5 through the spring limiting column 8. The spring limiting column 8 can be a rib on the housing 5 or a screw fixedly connected to the housing 5.

[0062] Preferably, Figure 3 As shown, the interlocking rod 4 is located in the first position and locked with the linkage plate 6, preventing the rotary handle 10 from rotating in the first direction; Figure 2A As shown, when the interlocking rod 4 is in the second position, the rotary handle 10 is rotated in the first direction, and the rotary handle 10 drives the interlocking rod 4 to rotate toward the first position through the linkage plate 6, so that the interlocking rod 4 switches to the first position and locks with the linkage plate 6, entering Figure 3 Further, as Figure 3 As shown, the interlocking lever is in the first position, the rotary handle 10 is rotated in the second direction, and the interlocking lever 4 is driven to rotate in the direction of the second position through the linkage plate 6, so that the interlocking lever 4 is rotated to the second position. It should be noted that the above action process is completed after the cabinet door 18 is opened.

[0063] like Figures 1A-2B As shown, the manual operating mechanism of the circuit breaker of the present invention further includes a driving member, which is mounted on a cabinet door 18 of a circuit breaker assembly cabinet for assembling the circuit breaker, and the driving member moves synchronously with the cabinet door 18; Figure 2A and 2B As shown, when the interlocking rod 4 is in the second position, the circuit breaker is in the open state and the cabinet door 18 is in the closed state, the cabinet door 18 is opened, and the driving member drives the interlocking rod 4 to rotate toward the first position, so that the first position 4 switches to the first position and locks with the linkage plate 6, entering Figure 3At this time, the cabinet door 18 is closed, and the driving member drives the interlocking rod 4 to rotate in the direction of the second position to the third position, so that the interlocking rod 4 and the linkage plate 6 are unlocked and the interlocking rod 4 and the driving member limit cooperate to prevent the cabinet door 18 from opening, and enter Figure 1A and 1B Further, as Figure 1A As shown, the interlocking rod 4 is in the third position and the cabinet door 18 is in the closed state, the rotary handle 10 is rotated in the second direction, and the interlocking rod 4 is driven to rotate in the direction of the second position through the linkage plate 6, so that the interlocking rod 4 is rotated to the second position, entering the state shown in FIG. Figure 2A The status shown; Figure 2A As shown, the interlocking rod 4 is in the second position and the cabinet door 18 is in the closed state, the rotary handle 10 is rotated in the first direction, and the interlocking rod 4 is driven to rotate in the direction of the first position through the linkage plate 6, so that the interlocking rod 4 is rotated to the third position, entering Figure 1A Status shown.

[0064] Preferably, the housing 5 further includes a housing opening 5a for the interlocking rod 4 to pass through and to limit the swing stroke of the interlocking rod 4. After the interlocking rod 4 passes through the housing opening 5a, one end protruding from the outside of the housing 5 is the interlocking rod interlocking portion 4c, which cooperates with the driving member. Figures 1A-2B As shown, the driving member includes a locking driving arm 19 and an unlocking driving arm 20 that are arranged opposite to each other, and the interlocking rod 4 is located between the locking driving arm 19 and the unlocking driving arm 20; Figure 2A and 2B As shown, when the interlocking rod 4 is in the second position, the circuit breaker is in the open state and the cabinet door 18 is in the closed state, the cabinet door 18 is opened, and the locking drive arm 19 drives the interlocking rod 4 to rotate past the critical position, the interlocking rod 4 rotates to the first position and locks with the linkage plate 6, and the organizational rotary handle 10 is rotated in the first direction to enter Figure 3 In the state shown, the cabinet door 18 is closed, and the unlocking drive arm 20 drives the interlocking rod 4 to rotate in the direction of the second position to the third position (the third position is between the second position and the critical position), so that the interlocking rod 4 and the linkage plate 6 are released from the locking cooperation and the unlocking drive arm 20 is limitedly cooperated with the interlocking rod 4 to prevent the cabinet door 18 from opening.

[0065] Preferably, Figure 1B and 2BAs shown, the locking drive arm 19 includes a first driving inclined surface 19a. When the cabinet door 18 is opened, the movement direction of the first driving inclined surface 19 is perpendicular to the rotation direction of the interlocking rod 4. The unlocking drive arm 20 includes a second driving inclined surface 20a and an unlocking drive arm hook 20b. When the cabinet door 18 is closed, the movement direction of the second driving inclined surface 20a is perpendicular to the rotation direction of the interlocking rod 4. After the cabinet door 18 is closed, the unlocking drive arm hook 20b cooperates with the interlocking rod 4 to prevent the cabinet door 18 from opening. Figure 1B and 2B As shown, the locking drive arm 19 includes a pointed locking drive arm protrusion arranged on one side of its free end, and a side wall of the locking drive arm protrusion is a first driving slope 19a; the unlocking drive arm hook 20b is a semi-arrow-shaped hook arranged at the free end of the unlocking drive arm 20, and a side wall of the unlocking drive arm hook 20b is a second driving slope 20a.

[0066] Preferably, Figure 1A 、 2A As shown in , 3, and 6, the interlocking rod 4 includes an interlocking rod locking end 40b, and the linkage plate 6 includes a linkage plate locking platform 60a; Figure 3 As shown, the locking end 40b of the interlocking rod and the locking platform 60a of the linkage plate are locked and matched to prevent the rotary handle 10 from rotating in the first direction. Figure 9 As shown, the linkage plate 6 includes a small diameter side wall 61a and a large diameter side wall 62a arranged in sequence along its axial direction. The outer diameter of the small diameter side wall 61a is smaller than the outer diameter of the large diameter side wall 62a. The connection between the small diameter side wall 61a and the large diameter side wall 62a forms a linkage plate locking platform 60a; Figure 3 As shown, when the interlocking rod 4 is locked with the linkage plate 6, the locking end 40b of the interlocking rod is opposite to the small diameter side wall 61a and is limitedly engaged with the linkage plate locking platform 60a. Figure 9 As shown, the small-diameter side wall 61 a and the large-diameter side wall 62 a are both arc-shaped side walls. The radius of the small-diameter side wall 61 a is smaller than the radius of the large-diameter side wall 62 a , and the centers of the two coincide with the rotation center of the linkage plate 6 .

[0067] Preferably, as shown in Figures 1-4 and 6, the interlocking rod 4 includes an interlocking rod curved surface 4f, and the linkage plate 6 includes a linkage plate driving end 6c. The linkage plate driving end 6c cooperates with the interlocking rod curved surface 4f to drive the interlocking rod 4 to swing back and forth, so that the interlocking rod 4 switches between the first position and the second position.

[0068] Preferably, Figure 9 As shown, the linkage plate driving end 6c, the small-diameter side wall 61a, the linkage plate locking platform 60a, and the large-diameter side wall 62a are sequentially arranged on the circumference of the linkage plate 6.

[0069] Specifically, such as Figure 3As shown, the interlocking rod 4 is in the first position, the rotation center of the transmission rod 1 is located on the left side of the axis of the spring 9, and the interlocking rod 4 is locked with the linkage plate 6 to prevent the rotary handle 10 from rotating in the counterclockwise direction (the first direction, i.e., the closing direction), that is, preventing the circuit breaker manual operating mechanism from driving the circuit breaker to close. Figure 2A and 2B As shown, when the interlocking rod 4 is in the second position, the circuit breaker is in the open state and the cabinet door 18 is in the closed state, the cabinet door 18 is opened (that is, the cabinet door 18 moves in the direction away from the manual operating mechanism of the circuit breaker), and the first driving inclined surface 19a of the locking driving arm 19 drives the interlocking rod 4 to rotate in the direction of the first position through the interlocking rod interlocking portion 4c. After the interlocking rod 4 rotates past the critical position, the interlocking rod 4 rotates to the first position under the action of the spring 9 and locks with the linkage plate 6, entering Figure 3 At this time, the cabinet door 18 is closed, and the cabinet door 18 drives the unlocking driving arm 20 to move toward the interlocking rod 4. The second driving inclined surface 20a of the unlocking driving arm 20 drives the interlocking rod 4 to rotate in the direction of the first position to the third position (the third position is between the second position and the critical position) through the interlocking rod interlocking portion 4c, and the interlocking rod interlocking portion 4c cooperates with the unlocking driving arm hook 20b to prevent the cabinet door 18 from opening, and entering Figure 2A and 2B Further, as Figure 2A As shown, when the interlocking rod 4 is in the second position and the cabinet door 18 is in the closed state, the rotary handle 10 is rotated in the first direction (counterclockwise), and the interlocking rod driving end 6c of the linkage plate 6 cooperates with the interlocking rod curved surface 4f of the interlocking rod 4 to drive the interlocking rod 4 to rotate in the direction of the first position (clockwise) after passing the critical position. Then, the spring 9 drives the interlocking rod 4 to rotate to the third position through the transmission rod 1, entering the state as shown in FIG. Figure 1A State shown; reference Figure 2A As shown, when the interlocking rod 4 is in the second position and the cabinet door 18 is opened, the rotary handle 10 rotates counterclockwise (first direction), and the driving end 6c of the linkage plate 6 cooperates with the interlocking rod curved surface 4f, driving the interlocking rod 4f to rotate counterclockwise to the first position and lock with the linkage plate 6, entering Figure 3 The status shown; Figure 1A As shown, the interlocking rod 4 is in the third position and the cabinet door 18 is in the closed state. The rotary handle 10 is rotated in the second direction (clockwise), and the interlocking rod 4 is driven to rotate in the direction of the second position (counterclockwise) through the linkage plate 6. After the interlocking rod 4 rotates past the critical position, the spring 9 drives the interlocking rod 4 to the second position through the transmission rod 1, entering Figure 2A The status shown; Figure 3As shown, the interlocking rod 4 is in the first position and the cabinet door 18 is in the open state. The rotary handle 10 is rotated in the second direction (clockwise), and the interlocking rod 4 is driven to rotate in the direction of the second position (counterclockwise) through the linkage plate 6. After the interlocking rod 4 rotates past the critical position, the spring 9 drives the interlocking rod 4 to the second position through the transmission rod 1.

[0070] Preferably, as shown in Figures 1-4 and 6, it is an embodiment of the interlocking rod 4: the interlocking rod 4 is a Y-shaped structure, including an interlocking rod first arm 4b, an interlocking rod second arm 4c and an interlocking rod third arm 4d, the free end of the interlocking rod first arm 4b (that is, the interlocking rod locking end 40b) is driven and cooperated with the linkage plate 6, the interlocking rod third arm 4d is provided with an interlocking rod driven shaft 4a, the free end of the interlocking rod second arm 4c passes through the outer shell 5 and protrudes outside the outer shell 5, an interlocking rod curved surface 4f is provided between the interlocking rod first arm 4b and the interlocking rod third arm 4d, and an interlocking rod shaft hole 4e is provided in the middle of the interlocking rod 4.

[0071] Preferably, as shown in Figures 1-4 and 6, a third arm avoidance groove is provided in the middle portion of the interlocking lever third arm 4d for avoiding the rotation axis of the transmission lever 1 (transmission lever shaft 2), and the interlocking lever driven shaft 4a is provided on one side of the free end of the interlocking lever third arm 4d. It should be noted that the interlocking lever third arm 4d may also be provided without the third arm avoidance groove, but the length of the interlocking lever third arm 4d may be reduced so that the interlocking lever third arm 4d does not interfere with the rotation axis of the transmission lever 1 during rotation. However, this will increase the resistance of the transmission lever 1 to the rotation of the interlocking lever 4.

[0072] Preferably, Figure 6 As shown, the interlocking rod curved surface 4f is a C-shaped curved surface. Figure 6 As shown, the interlocking rod curved surface 4f includes a plurality of interlocking rod straight surfaces that are bent and connected in sequence.

[0073] Preferably, Figure 5 As shown, the manual operating mechanism of the circuit breaker of the present invention further includes a knob 17, which is rotatably mounted on the housing 5. One end of the knob 17 is a knob operating end, located on one side of the rotary handle 10, and the other end of the knob 17 is drivingly connected to the interlocking rod 4. Turning the knob operating end drives the interlocking rod 4 to rotate, switching the interlocking rod 4 between the first position and the second position. The user can also use the knob 17 to drive the interlocking rod 4 to release the locking engagement with the linkage plate 6. Furthermore, as shown in Figures 1-4, the interlocking rod 4 is drivingly connected to the rotary handle 10 via an interlocking rod shaft 3. The interlocking rod shaft 3 is preferably a screw, a rivet, or a connector that can be used to securely connect the interlocking rod 4 and the rotary handle 10.

[0074] Preferably, as shown in FIG. 1-4 and FIG. 5 , the housing 5 further includes a housing opening 5 a for the interlocking rod 4 to pass through and for limiting the swing stroke of the interlocking rod 4 .

[0075] Preferably, Figure 8-10 As shown, the linkage plate assembly 613 also includes a transmission block 13 and a transmission shaft 12 arranged on the linkage plate 6. The transmission block 13 includes a track groove 13a arranged along its axial direction and used to guide and limit the transmission shaft 12. One end of the transmission shaft 12 is inserted into the track groove 13a; one end of the driving component 11 is pivotally set on the housing 5, and the other end is drivingly connected to the other end of the transmission shaft 12.

[0076] Preferably, Figure 8 As shown, the track groove 13a includes a first track groove 131a and a second track groove 130a that are stacked and connected to each other, and the width of the first track groove 131a is greater than the width of the second track groove 130a; the transmission shaft 12 includes a first transmission shaft section 12a, a second transmission shaft section 12b and a third transmission shaft section 12c that are connected in sequence, the outer diameter of the first transmission shaft section 12a is greater than the width of the second track groove 130a and is arranged in the first track groove 131a, and the outer diameter of the second transmission shaft section 12b matches the width of the second track groove 130a. Further, as Figure 8 As shown, the outer diameters of the third section 12c and the first section 12a of the transmission shaft are the same; one end of the second track groove 130a is provided with a transmission shaft insertion hole 1300a connected thereto, and the inner diameter of the transmission shaft insertion hole 1300a is larger than the outer diameter of the first section 12a of the transmission shaft. Figure 8 As shown, the first section 12a of the transmission shaft, the second section 12b of the transmission shaft and the third section 12c of the transmission shaft are coaxially arranged and connected in sequence. The outer diameters of the first section 12a of the transmission shaft and the third section 12c of the transmission shaft are the same, and an annular groove located outside the transmission shaft 12b is formed between the two. The spacing between the first section 12a of the transmission shaft and the third section 12c of the transmission shaft matches the depth of the second track groove 130a; the cross section of the track groove 13 is a convex structure.

[0077] Preferably, Figure 8-10 As shown, the transmission block 13 is fixedly arranged on one side of the linkage plate 6 through multiple mounting shafts, and the rotary handle 10 is respectively located on both sides of the linkage plate 6. Figure 8-10 As shown, the mounting shaft includes a first mounting shaft 7, one end of which protrudes from the side of the linkage plate 6 facing the housing 5; the housing 5 includes a first track groove 5b provided thereon for guiding and limiting the rotation stroke of the linkage plate assembly 613, and the first mounting shaft 7 is inserted into the first track groove 5b. Specifically, as Figure 8-10 As shown, one end of the transmission block 13 is connected to the linkage plate 6 through two first mounting shafts 7, and the two first mounting shafts 7 are respectively located on both sides of the track groove 13; the other end of the transmission block 13 is connected to the linkage plate 6 through two second mounting shafts 14, and the two second mounting shafts 14 are respectively located on both sides of the track groove 13.

[0078] Preferably, Figure 8 and 9 As shown, the linkage plate 6 includes a linkage plate driven portion 6a and a linkage plate transmission portion 6b connected to each other, the rotary handle 10 is driven and connected to the linkage plate driven portion 6a, and the transmission block 13 is fixedly arranged on one side of the linkage plate transmission portion 6b. Figure 8 As shown, the linkage plate driven portion 6a is connected to the rotary handle 10 via a linkage plate connector 15 . The linkage plate connector 15 is preferably a screw, a rivet or other connector that can be used to fasten the linkage plate driven portion 6a and the rotary handle 10 .

[0079] Preferably, as shown in Figures 1-4 and 8-9, it is an embodiment of the linkage plate 6: the linkage plate 6 includes a linkage plate driven part 6a and a linkage plate transmission part 6b connected to each other, and the linkage plate driven part 6a is sequentially provided with a linkage plate driving end 6c, a small diameter side wall 61a, a linkage plate locking platform 60a, and a large diameter side wall 62a on the circumference thereof, and the linkage plate transmission part 6b is located between the large diameter side wall 62a and the linkage plate driving end 6c.

[0080] Preferably, Figure 9 As shown, the linkage plate driving end 6c is an acute-angle protrusion provided on the peripheral side of the linkage plate driven portion 6a.

[0081] Preferably, Figure 9 As shown, the small-diameter side wall 61 a and the large-diameter side wall 62 a are both arc-shaped side walls, the centers of which coincide with the rotation center of the linkage plate 6 , and the radius of the former is smaller than that of the latter.

[0082] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A manual operating mechanism for a circuit breaker, characterized in that: The invention comprises a rotating handle (10), a housing (5), and an interlocking rod (4), a linkage plate assembly (613), a transmission rod (1) and a spring (9) respectively arranged in the housing (5); the linkage plate assembly (613) comprises a linkage plate (6); the rotating handle (10) is rotatably arranged on the housing (5) and is drive-connected with the linkage plate (6); the rotating handle (10) and the linkage plate assembly (613) rotate synchronously; the interlocking rod (4) is pivotally arranged on the housing (5) and is drive-matched with the linkage plate (6); the transmission rod (1) is pivotally arranged on the housing (5), one end of which is drive-connected with the interlocking rod (4) and the other end of which is connected to one end of a spring (9); the other end of the spring (9) is position-matched with the housing (5); the interlocking rod (4) switches between a first position and a second position by reciprocating swing, the spring (9) applies a first action force F1 and a second action force F2 to the transmission rod (1) respectively, and the transmission rod (1) keeps the interlocking rod (4) in the first position and the second position respectively.

2. The circuit breaker manual operating mechanism according to claim 1, characterized in that: The spring (9) is a tension spring, and the first acting force F1 and the second acting force F2 are both tension forces; when the interlocking rod (4) is in the first position, the rotation center of the transmission rod (1) is located on one side of the axis of the spring (9); when the interlocking rod (4) is in the second position, the rotation center of the transmission rod (1) is located on the other side of the axis of the spring (9).

3. The manual operating mechanism of a circuit breaker according to claim 1, characterized in that: The transmission rod (1) includes a transmission rod strip hole (11a) provided at one end thereof, and the interlocking rod (4) includes an interlocking rod actuated shaft (4a). The length of the transmission rod strip hole (11a) is greater than the outer diameter of the interlocking rod actuated shaft (4a), and the interlocking rod actuated shaft (4a) is inserted into the transmission rod strip hole (11a).

4. The manual operating mechanism of a circuit breaker according to claim 3, characterized in that: When the interlocking rod (4) is in the first position, the interlocking rod driven shaft (4a) is located on one side of the axis of the spring (9); when the interlocking rod (4) is in the second position, the interlocking rod driven shaft (4a) is located on the other side of the axis of the spring (9).

5. The circuit breaker manual operating mechanism according to any one of claims 1 to 4, characterized in that: The interlocking rod (4) is a Y-shaped structure, comprising an interlocking rod first arm (4b), an interlocking rod second arm (4c) and an interlocking rod third arm (4d); the free end of the interlocking rod first arm (4b) is locked with the linkage plate (6); the interlocking rod third arm (4d) is provided with an interlocking rod driven shaft (4a); and the free end of the interlocking rod second arm (4c) passes through the housing (5) and protrudes outside the housing (5).

6. The circuit breaker manual operating mechanism according to claim 5, characterized in that: A third arm avoidance groove for avoiding the rotation axis of the transmission rod (1) is provided in the middle of the third arm (4d) of the interlocking rod, and the interlocking rod driven shaft (4a) is arranged on one side of the free end of the third arm (4d) of the interlocking rod.

7. The circuit breaker manual operating mechanism according to any one of claims 1 to 4, characterized in that: The interlocking rod (4) is located in the first position and is locked with the linkage plate (6), preventing the rotary handle (10) from rotating in the first direction; when the interlocking rod (4) is located in the second position, the rotary handle (10) rotates in the first direction, driving the interlocking rod (4) to rotate in the first position through the linkage plate (6), so that the interlocking rod (4) switches to the first position.

8. The manual operating mechanism of a circuit breaker according to claim 7, characterized in that: When the interlocking rod (4) is located at the second position, the rotary handle (10) rotates in the first direction, and the rotary handle (10) drives the interlocking rod (4) to rotate to the first position through the linkage plate (6) and after the interlocking rod (4) passes the critical position, the interlocking rod (4) automatically rotates to the first position.

9. The manual operating mechanism of a circuit breaker according to claim 7, characterized in that: The circuit breaker manual operating mechanism further comprises a driving member, which is mounted on a cabinet door (18) of a circuit breaker assembly cabinet for assembling the circuit breaker, and the driving member moves synchronously with the cabinet door (18); when the interlocking rod (4) is in the second position, the circuit breaker is in an open state, and the cabinet door (18) is in a closed state, the cabinet door (18) is opened, and the driving member drives the interlocking rod (4) to rotate toward the first position, so that the interlocking rod (4) switches to the first position and locks with the linkage plate (6); at this time, the cabinet door (18) is closed, and the driving member drives the interlocking rod (4) to rotate in the direction of the second position to the third position, so that the interlocking rod (4) and the linkage plate (6) are released from locking, and the interlocking rod (4) and the driving member are limited, thereby preventing the cabinet door (18) from opening.

10. The manual operating mechanism of a circuit breaker according to claim 7, characterized in that: The interlocking rod (4) includes an interlocking rod curved surface (4f), and the linkage plate (6) includes a linkage plate driving end (6c). The linkage plate driving end (6c) cooperates with the interlocking rod curved surface (4f) to drive the interlocking rod (4) to swing back and forth.

11. The manual operating mechanism of a circuit breaker according to claim 7, characterized in that: The interlocking rod (4) includes an interlocking rod locking end (40b), and the linkage plate (6) includes a linkage plate locking platform (60a). The interlocking rod locking end (40b) and the linkage plate locking platform (60a) are locked and matched to prevent the rotary handle (10) from rotating in the first direction.

12. The circuit breaker manual operating mechanism according to claim 11, characterized in that: The linkage plate (6) further comprises a small-diameter side wall (61a) and a large-diameter side wall (62a) sequentially arranged along its circumference; the outer diameter of the small-diameter side wall (61a) is smaller than the outer diameter of the large-diameter side wall (62a); and a linkage plate locking platform (60a) is formed at the connection between the small-diameter side wall (61a) and the large-diameter side wall (62a); when the interlocking rod (4) is locked with the linkage plate (6), the interlocking rod locking end (40b) is opposite to the small-diameter side wall (61a) and is limitedly engaged with the linkage plate locking platform (60a).

13. The circuit breaker manual operating mechanism according to claim 12, characterized in that: The small-diameter side wall (61a) and the large-diameter side wall (62a) are both arc-shaped side walls, and the radius of the small-diameter side wall (61a) is smaller than the radius of the large-diameter side wall (62a).

14. The manual operating mechanism of a circuit breaker according to claim 12, characterized in that: The linkage plate driving end (6c), the small-diameter side wall (61a), the linkage plate locking platform (60a) and the large-diameter side wall (62a) of the linkage plate (6) are sequentially arranged on the circumference of the linkage plate (6).

15. The manual operating mechanism of a circuit breaker according to claim 9, characterized in that: The housing (5) further comprises a housing opening (5a) for the interlocking rod (4) to pass through and for limiting the swing stroke of the interlocking rod (4); after the interlocking rod (4) passes through the housing opening (5a), one end protruding outside the housing (5) cooperates with the driving member.

16. The manual operating mechanism of a circuit breaker according to claim 15, characterized in that: The driving member comprises a locking driving arm (19) and an unlocking driving arm (20) which are arranged opposite to each other, and the interlocking rod (4) is located between the locking driving arm (19) and the unlocking driving arm (20); when the interlocking rod (4) is located at the second position, the circuit breaker is in the off state and the cabinet door (18) is in the closed state, the cabinet door (18) is opened, the locking driving arm (19) drives the interlocking rod (4) to rotate past the critical position, the interlocking rod (4) rotates to the first position and locks with the linkage plate (6), preventing the rotary handle (10) from rotating in the first direction, and at this time the cabinet door (18) is closed, the unlocking driving arm (20) drives the interlocking rod (4) to rotate in the direction of the second position to the third position, so that the interlocking rod (4) and the linkage plate (6) are released from the locking cooperation and the unlocking driving arm (20) and the interlocking rod (4) are limitedly cooperated, preventing the cabinet door (18) from being opened.

17. The circuit breaker manual operating mechanism according to claim 16, characterized in that: The locking drive arm (19) includes a first driving inclined surface (19a). When the cabinet door (18) is opened, the moving direction of the first driving inclined surface (19a) is perpendicular to the rotation direction of the interlocking rod (4). The unlocking drive arm (20) includes a second driving inclined surface (20a) and an unlocking drive arm hook (20b). When the cabinet door (18) is closed, the moving direction of the second driving inclined surface (20a) is perpendicular to the rotation direction of the interlocking rod (4). After the cabinet door (18) is closed, the unlocking drive arm hook (20b) is limitedly engaged with the interlocking rod (4) to prevent the cabinet door (18) from opening.

18. The manual operating mechanism for a circuit breaker according to any one of claims 1 to 4, characterized in that: The circuit breaker manual operating mechanism further comprises a knob (17), which is rotatably arranged on the housing (5), one end of the knob (17) being a knob operating end located on one side of the rotary handle (10), and the other end of the knob (17) being drivingly connected to the interlocking rod (4); turning the knob operating end drives the interlocking rod (4) to rotate.

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