Circuit breaker operating mechanism

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to an operating mechanism of a circuit breaker, which comprises a handle, a primary connecting rod, a secondary connecting rod, a trip button, a moving contact piece, a lock button and an arc-shaped slide groove arranged in a housing of the circuit breaker; the handle is pivotally arranged on the housing, a first front end of the primary connecting rod is rotationally connected to one end of the handle, a first rear end of the primary connecting rod is rotationally connected to a middle part of the trip button and slidably matched with the slide groove, one end of the trip button is rotationally connected to one end of the secondary connecting rod, a trip button matching end of the trip button is used for lock-matching with a lock button matching end at one end of the lock button, the middle part of the lock button is pivotally arranged on the housing, the other end of the secondary connecting rod is rotationally connected to one end of the moving contact piece, the moving contact piece is rotationally arranged on a first rotating shaft through a waist-shaped hole arranged in the middle part, and a moving contact point is arranged at the other end of the moving contact piece; the operating mechanism of the circuit breaker of the present invention has a simple structure, is easy to assemble, has a compact layout, and saves assembly space.

Description

Technical Field

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

[0002] The existing circuit breakers have complex structures and processes, and are difficult to automate. In particular, the operating mechanisms of the existing circuit breakers occupy a large space and cannot meet the needs of the development trend of intelligent and miniaturized circuit breakers. Summary of the invention

[0003] The object 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, has a compact layout and saves assembly space.

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

[0005] An operating mechanism of a circuit breaker comprises a handle 1, a primary connecting rod 2, a secondary connecting rod 3, a tripping catch 4, a moving contact piece 5, a locking catch 7 and an arc-shaped sliding groove 8 arranged in a housing H of the circuit breaker;

[0006] The handle 1 is pivotally set on the shell H, the first front end 20 of the first connecting rod 2 is rotationally connected to one end of the handle 1, the first rear end 21 of the first connecting rod 2 is rotationally connected to the middle part of the jump buckle 4 and slidingly cooperates with the slide groove 8, one end of the jump buckle 4 is rotationally connected to one end of the secondary connecting rod 3, the jump buckle matching end 410 of the jump buckle 4 is used for locking cooperation with the lock matching end 700 at one end of the lock buckle 7, the middle part of the lock buckle 7 is pivotally set on the shell H, the other end of the secondary connecting rod 3 is rotationally connected to one end of the moving contact member 5, the moving contact member 5 is rotationally set on the first rotating shaft 5rs through a waist-shaped hole 53 set in the middle part, and a moving contact point 52 is provided at the other end of the moving contact member 5.

[0007] Preferably, the slide groove 8 is arc-shaped, and the center of the slide groove 8 is located on the rotation axis of the lock buckle 7 .

[0008] Preferably, when the circuit breaker is in the open state, the jumper mating end 410 and the lock mating end 700 are arranged opposite to each other, and a mating gap G is provided between the jumper mating end 410 and the lock mating end 700, so that the jumper mating end 410 and the lock mating end 700 are locked and mated when the handle 1 drives the operating mechanism to close the circuit.

[0009] Preferably, the slide groove 8 is arranged on the housing H and is an integral structure therewith, and the first rear end 21 passes through the jump buckle 4 and is inserted into the slide groove 8 to slideably cooperate therewith.

[0010] Preferably, the handle 1 rotates and drives the first rear end 21 to move along the slide groove 8, and the first rear end 21 drives the trip latch 4 to rotate, so that the trip latch mating end 410 is locked with the lock mating end 700, and at the same time, the secondary connecting rod 3, the trip latch 4, the moving contact piece 5 and the lock latch 7 form a four-bar mechanism that is relatively stationary and rotates synchronously with each other until the moving contact 52 initially contacts the static contact 520 of the circuit breaker, and the handle 1 continues to rotate to the closed position, driving the moving contact piece 5 to swing with the static contact 520 as the fulcrum, and the waist-shaped hole 53 moves relative to the first rotating shaft 5rs, and the circuit breaker enters the closed state.

[0011] Preferably, it also includes a first reset spring 90 for driving the movable contact member 5 to reset, and a second reset spring 92 for driving the lock catch 7 to reset, and the other end of the lock catch 7 is used to drive and cooperate with the protection mechanism of the circuit breaker;

[0012] When a fault occurs, the protection mechanism drives the lock catch 7 to rotate, so that the lock catch mating end 700 releases the lock fit with the trip catch mating end 410, and the first reset spring 90 drives the moving contact piece 5 to rotate, so that the moving contact 52 and the static contact 520 are disconnected. At the same time, the moving contact piece 5 drives the trip catch 4 to rotate around the first rear end 21 as the axis through the secondary connecting rod 3, and the circuit breaker enters the tripping state. After the circuit breaker trips, the second reset spring 92 drives the lock catch 7 to rotate and reset.

[0013] Preferably, the moving contact member 5 includes a moving contact connecting part 50 and a moving contact contact part 51 respectively arranged at both ends thereof, one end of the moving contact connecting part 50 is rotatably connected to the secondary connecting rod 3, the other end is provided with a waist-shaped hole 53 and this end is connected to one end of the moving contact contact part 51 by bending, the other end of the moving contact contact part 51 is provided with a moving contact point 52, one end of the first return spring 90 is connected to the housing H, and the other end is connected to the moving contact connecting part 50.

[0014] Preferably, the protection mechanism includes a short-circuit protection mechanism 9 and an overload protection mechanism 6, and the lock 7 is a Y-shaped structure, which includes a mating arm 70, a short-circuit driving arm 71 driven and cooperated with the short-circuit protection mechanism 9, and an overload driving arm 72 driven and cooperated with the overload protection mechanism 6. One end of the mating arm 70 is provided with a lock mating end 700, and the other end is respectively bent and connected to the short-circuit driving arm 71 and the overload driving arm 72; the mating arm 70 is pivotally arranged on the shell H.

[0015] Preferably, the trip button 4 also includes an opening indication surface and a closing indication surface arranged on one side thereof, and an indication hole cooperating with the opening indication surface and the closing indication surface is provided on the housing H; when the circuit breaker is closed, the handle 1 rotates and drives the four-bar mechanism to rotate through the primary connecting rod 2, so that the closing indication surface is opposite to the indication hole; when the circuit breaker trips, the moving contact member 5 drives the trip button 4 to rotate through the secondary connecting rod 3, so that the opening indication surface is opposite to the indication hole.

[0016] Preferably, the operating mechanism of the circuit breaker also includes a moving contact limit platform 7a, which limits the rotation angle of the moving contact member 5 when the moving contact 52 and the static contact 520 are disconnected; the operating mechanism of the circuit breaker also includes a lock positioning structure, and the second reset spring 92 drives the lock 7 to rotate and reset, so that the lock 7 is close to the lock positioning structure, and the moving contact limit platform 7a and the lock positioning structure are both arranged on the housing H.

[0017] Preferably, when the switch is opened, the trip latch 4 has a matching end 410 located above the locking latch 700 and is provided with a matching gap G; when the switch is closed, the handle 1 drives the trip latch 4 to rotate through the first connecting rod 2, so that the trip latch matching end 410 moves toward the locking latch matching end 700 to eliminate the matching gap G and enable the trip latch 4 and the locking latch 7 to be locked and matched.

[0018] Compared with the operating mechanism of the existing circuit breaker, the operating mechanism of the circuit breaker of the present invention omits the rotating plate, has fewer parts, and the connection relationship between the components of the operating mechanism is simple, which is convenient for automatic assembly, has a compact layout, and saves the assembly space of the housing. In addition, a matching gap is provided between the jump buckle matching end and the lock buckle matching end, which ensures the reliability of the jump buckle and the lock buckle resetting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a second embodiment of the operating mechanism of the circuit breaker of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a first embodiment of the operating mechanism of the circuit breaker of the present invention, the circuit breaker is in an open state, and a matching gap is provided between the tripping matching end of the tripping catch and the locking matching end of the locking catch;

[0021] Figure 3 The present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0022] Figure 4 It is a structural schematic diagram of a first embodiment of the operating mechanism of the circuit breaker of the present invention, and the jumper mating end of the jumper and the lock mating end of the lock are locked and matched by turning the handle;

[0023] Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure of part B;

[0024] Figure 6 It is a structural schematic diagram of a first embodiment of the operating mechanism of the circuit breaker of the present invention, and at least shows the state of the operating mechanism when the moving contact and the static contact are initially in contact.

[0025] Figure 7It is a structural schematic diagram of a first embodiment of the operating mechanism of the circuit breaker of the present invention. The circuit breaker is in a closed state, and the moving contact piece is offset relative to the first rotating shaft.

[0026] Figure 8 It is a structural schematic diagram of a first embodiment of the operating mechanism of the circuit breaker of the present invention. The circuit breaker is in a tripped state, and the tripping mating end of the tripping buckle and the locking mating end of the locking buckle are released from the locking mating end.

[0027] Fig. 9 It is a structural schematic diagram of a specific embodiment of the first implementation mode of the operating mechanism of the circuit breaker of the present invention, the circuit breaker is in a closed state, and at least the structures of the trip button, the lock button, and the moving contact member are shown;

[0028] Fig.10 It is a structural schematic diagram of the first connecting rod of the present invention;

[0029] Fig.11 It is a structural schematic diagram of the secondary connecting rod of the present invention;

[0030] Fig.12 It is a structural schematic diagram of the moving contact member of the present invention;

[0031] Fig.13 It is a schematic structural diagram of the base of the housing H of the present invention. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-13 The given embodiments further illustrate the specific implementation 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.

[0033] The circuit breaker of the present invention comprises an operating mechanism arranged in a housing H of the circuit breaker, wherein the operating mechanism comprises a handle 1, a primary connecting rod 2, a secondary connecting rod 3, a tripping catch 4, a moving contact member 5, a locking catch 7 and an arc-shaped sliding groove 8;

[0034] The middle part of the handle 1 is pivotally arranged on the housing H, the first front end 20 at one end of the primary connecting rod 2 is rotatably connected to one end of the handle 1, the first rear end 21 at the other end is rotatably connected to the middle part of the jump buckle 4 and slidably cooperates with the slide groove 8, one end of the jump buckle 4 is rotatably connected to one end of the secondary connecting rod 3, and the jump buckle matching end 410 at the other end is used to lock and cooperate with the lock matching end 700 at one end of the lock buckle 7, the middle part of the lock buckle 7 is pivotally arranged on the housing H, and the other end is used to drive and cooperate with the protection mechanism of the circuit breaker, the other end of the secondary connecting rod 3 is rotatably connected to one end of the moving contact member 5, and the other end of the moving contact member 5 is provided with a moving contact 52 used in cooperation with a static contact 520 fixed on the housing H, and the moving contact member 5 is rotatably arranged on the first rotating shaft 5rs through a waist-shaped hole 53 provided in the middle part thereof;

[0035] When closing the circuit breaker, the handle 1 rotates and drives the first rear end 21 to slide along the slide groove 8, and the first rear end 21 drives the trip latch 4 to rotate, so that the trip latch mating end 41 is locked with the lock mating end 700, and at the same time, the secondary connecting rod 3, the trip latch 4, the moving contact piece 5 and the lock buckle 7 form a four-bar mechanism that is relatively stationary and rotates synchronously with each other until the moving contact 52 and the static contact 520 are initially in contact. The handle 1 continues to rotate to the closing position, driving the moving contact piece 5 to swing with the static contact 520 as the fulcrum, and the waist-shaped hole 53 moves relative to the first rotating shaft 5rs, and the circuit breaker enters the closing state.

[0036] Compared with the operating mechanism of the existing circuit breaker, the operating mechanism of the circuit breaker of the present invention omits the rotating plate, has fewer parts, has simple connection relationship between the components of the operating mechanism, is convenient for automatic assembly, has a compact layout, and saves assembly space of the housing.

[0037] Preferably, Figure 2 and 3 As shown, when the circuit breaker is in the off state, the trip buckle mating end 410 and the lock buckle mating end 700 are arranged opposite to each other, and a mating gap G is provided between the trip buckle mating end 410 and the lock buckle mating end 700. After the circuit breaker trips, the trip buckle 410 will enter Figure 8 In the state shown, when the handle 1 is turned to drive the trip button 4 to reset, if there is no matching gap, the trip button matching end 410 will be blocked by the matching arm 70 of the lock button 7 and cannot be reset due to the effects of part tolerance, deformation, external force, etc., which will cause the circuit breaker to be unable to close again, reducing the reliability of the circuit breaker. Therefore, the matching gap G ensures the reliability of the reset of the trip button 4 and the lock button 7. It should be pointed out that the matching gap G should not be set too large, which is not conducive to saving the internal assembly space of the circuit breaker, and it should not be too small, otherwise the trip button 4 will not be able to be reset. Preferably, the width of the matching gap is 1mm-5mm.

[0038] Preferably, Figure 1 , 2 As shown in , 4, 6-8, the middle part of the lock catch 7 is pivotally arranged on the housing H through the first rotating shaft 5rs. The lock catch 7 and the moving contact member 5 are coaxially assembled and coaxially rotated, which is conducive to further reducing the volume of the operating mechanism and saving the assembly space in the housing. Of course, the middle part of the lock catch 7 can also be pivotally arranged on the housing H through the second rotating shaft 7rs, and the second rotating shaft 7rs is fixed on the housing H and is located on one side of the first rotating shaft 5rs.

[0039] Preferably, the slide groove 8 is arc-shaped, and the center of the slide groove 8 is located on the rotation axis of the lock buckle 7, which is not only conducive to transmission cooperation, but also helps to further reduce the volume of the operating mechanism and save assembly space in the shell.

[0040] Preferably, it also includes a first reset spring 90 for driving the movable contact member 5 to reset, and a second reset spring 92 for driving the lock catch 7 to reset. The second reset spring 92 is connected to the housing H and the lock catch 7 respectively. The protection mechanism includes a short circuit protection mechanism 9 and an overload protection mechanism 6, and of course, it can also include protection mechanisms with other functions. Figure 8 , 9 As shown, when a short circuit fault or an overload fault occurs, the short circuit protection mechanism 9 or the overload protection mechanism 6 drives the lock buckle 7 to rotate, so that the lock buckle mating end 700 releases the lock buckle mating with the trip buckle mating end 410, and the first reset spring 90 drives the moving contact piece 5 to rotate, so that the moving contact 52 and the static contact 520 are disconnected. At the same time, the moving contact piece 5 drives the trip buckle 4 to rotate with the first rear end 21 as the axis through the secondary connecting rod 3, and the circuit breaker enters the tripping state. After the circuit breaker trips, the second reset spring 92 drives the lock buckle 7 to rotate and reset.

[0041] Preferably, Fig.13 As shown, the slide slot 8 is provided on the housing H and is an integral structure therewith, and the first rear end 21 passes through the jump buckle 4 and is slidably provided in the slide slot 8. It should be noted that there is another matching mode between the first rear end 21, the jump buckle 4 and the slide slot 8, that is, the first rear end 21 is a rod-shaped structure, one end of which is rotatably connected to the jump buckle 4, and the other end is slidably provided in the slide slot 8.

[0042] like Figure 2-12 FIG. 1 shows a first embodiment of the operating mechanism of the circuit breaker of the present invention.

[0043] like Figure 2 , 4As shown in , 6, 7-9, the circuit breaker of the present invention includes an operating mechanism arranged in the housing H of the circuit breaker, and the operating mechanism includes a handle 1, a primary connecting rod 2, a secondary connecting rod 3, a tripping catch 4, a moving contact piece 5, a lock catch 7, and an arc-shaped slide groove 8. The housing H of the circuit breaker is also provided with a first reset spring 90, a second reset spring 92 and a first rotating shaft 5rs. The middle part of the handle 1 is pivotally arranged on the housing H, the first front end 20 at one end of the primary connecting rod 2 is rotationally connected to one end of the handle 1, and the first rear end 21 at the other end is rotationally connected to the middle part of the tripping catch 4 and is slidably arranged in the slide groove 8, one end of the tripping catch 4 is rotationally connected to one end of the secondary connecting rod 3, and the tripping catch mating end 410 at the other end is mated with the lock mating end 700 at one end of the lock catch 7, the middle part of the lock catch 7 is pivotally arranged on the housing H, and the other end is respectively driven and mated with the short-circuit protection mechanism 9 and the overload protection mechanism 6 of the circuit breaker, and the secondary connecting rod 3 is also driven and mated with the short-circuit protection mechanism 9 and the overload protection mechanism 6 of the circuit breaker. One end is rotatably connected to one end of the moving contact 5, and the other end of the moving contact 5 is provided with a moving contact 52 used in conjunction with a static contact 520 fixed on the housing H. The moving contact 5 is rotatably arranged on the first rotating shaft 5rs through a waist-shaped hole 53 arranged in the middle thereof, and the first rotating shaft 5rs is fixed on the housing H; the two ends of the first reset spring 90 are respectively connected to the housing H and the moving contact 5; the two ends of the second reset spring 92 are respectively connected to the housing H and the lock buckle 7; the center of the circle of the slide groove 8 is located on the rotation axis of the lock buckle 7. Further, as Figure 2 and 3 As shown, when the circuit breaker is in the open state, the jumper mating end 410 and the lock mating end 700 are arranged opposite to each other, and a mating gap G is provided between the jumper mating end 410 and the lock mating end 700. Figure 3 As shown, the width of the fitting gap is L.

[0044] Preferably, Figure 2 As shown, the handle 1 includes an operating arm 10 and a transmission arm 11 connected by bending, the connection between the operating arm 10 and the transmission arm 11 is pivotally arranged on the housing H, the free end of the operating arm 10 protrudes outside the housing H for user operation, and the free end of the transmission arm 11 is rotatably connected to the first front end 20 of the first link 2. Further, as Figure 2 As shown, the angle between the operating arm 10 and the transmission arm 11 is an acute angle.

[0045] Preferably, Fig.13 As shown, the slide groove 8 is arranged on the shell H and is an integral structure therewith. The first rear end 21 passes through the jump buckle 4 and is inserted into the slide groove 8 to slide with it. The slide groove 8 is arc-shaped, and the center of the slide groove 8 is located on the rotation axis of the lock buckle 7.

[0046] Preferably, the circuit breaker further includes a movable contact limiting platform 7a, which limits the rotation angle of the movable contact member 5 when the movable contact 53 and the static contact 520 are disconnected; the circuit breaker further includes a lock catch positioning structure, and when the second reset spring 92 drives the lock catch 7 to rotate and reset, the lock catch 7 is closely against the lock catch positioning structure. Further, the movable contact limiting platform 7a and the lock catch positioning structure are both arranged on the housing H.

[0047] Specifically, Figure 2 In the direction shown, the middle part of the handle 1 is pivotally arranged on the housing H, and the free end of the operating arm 10 protrudes outside the housing H for user operation. The free end of the transmission arm 11 is rotationally connected to the left end of the first connecting rod 2, and the first rear end 21 of the right end of the first connecting rod 2 is rotationally connected to the middle part of the jump buckle 4, and the first rear end 21 passes through the jump buckle 4 and is inserted into the slide groove 8 to slide with the slide groove 8. The center of the slide groove 8 is located on the axis of the first rotating shaft 5rs, and the right end of the jump buckle 4 is rotationally connected to the left end of the secondary connecting rod 3. The jump buckle matching end 410 at the right end is matched with the lock buckle matching end 700 at the upper end of the lock buckle 7. The middle part of the lock buckle 7 is pivotally arranged on the housing H through the first rotating shaft 5rs, and the lower end is respectively connected to the short-circuit protection mechanism 9 and the overload protection mechanism 6 drive matching. The left end of the secondary connecting rod 3 is rotatably connected to the upper end of the moving contact 5, and the lower end is provided with a moving contact 52 used in conjunction with a static contact 520 fixed on the housing H. The moving contact 5 is rotatably set on the first rotating shaft 5rs through a waist-shaped hole 53 (not shown in the figure) set in the middle thereof, and the first rotating shaft 5rs is fixed on the housing H; the first reset spring 90 is set on the right side of the moving contact 5, one end of which is connected to the part of the moving contact 5 located above the waist-shaped hole 53, and the other end is connected to the housing H (not shown in the figure); the second reset spring 92 (not shown in the figure) provides a force for the lock buckle 7 to drive it to rotate clockwise, and drives the lock buckle 7 to rotate and reset after the circuit breaker trips, so that the lock buckle 7 is close to the lock buckle positioning structure. Further, as Figure 2 In the direction shown, the movable contact stopper 7a is arranged on the right side of the movable contact member 5. When the circuit breaker is in the open state, the movable contact contact portion 51 of the movable contact member 5 is close to the movable contact stopper 7a. Figure 2 In the direction shown, the short-circuit protection mechanism 9 is arranged below the handle 1 and on the left side of the lock 7, and is preferably an electromagnetic release; the overload protection mechanism 6 is arranged on the right side of the lock 7, and is preferably a bimetallic strip.

[0048] The following combination Figure 2-8 As shown, the action process of the operating mechanism of the present invention is described.

[0049] like Figure 2As shown, the circuit breaker is in the open state, at which time the handle 1 is in the open position O (to be precise, the operating arm 10 of the handle 1 is parked at the open position O), the tripping buckle 4's tripping buckle mating end 410 is located above the lock buckle mating end 700 of the lock buckle 7, the two are arranged opposite to each other and a mating gap G is provided between the two; when closing the circuit, the handle 1 is moved to rotate clockwise, firstly, the handle 1 drives the tripping buckle 4 to rotate counterclockwise through the first connecting rod 2 (at this time, the tripping buckle 4 rotates with the first rear end 21 as the axis, and the rotation amplitude is small), so that the tripping buckle mating end 410 moves toward the lock buckle mating end 700 (to eliminate the mating gap G), so that the two are locked and mated (as shown in FIG. Figure 4-5 As shown in the figure, at this time, the trip button 4, the secondary connecting rod 3, the moving contact piece 5, and the lock buckle 7 constitute a four-bar linkage mechanism that is relatively stationary and rotates synchronously. If the handle 1 is continuously turned to rotate clockwise, the four-bar linkage mechanism is driven to rotate clockwise around the rotating shaft of the lock buckle 7 until the moving contact 52 at the lower end of the moving contact piece 5 is initially in contact with the static contact 520 (as shown in the figure). Figure 6 As shown in the figure, at this time, the moving contact 52 and the static contact 520 just touch each other), the handle 1 is further turned to rotate clockwise, and the moving contact 5 starts to swing clockwise with the static contact 520 as the fulcrum, and at the same time, the waist-shaped hole 53 moves relative to the first rotating shaft 5rs (preferably, the waist-shaped hole 53 translates relative to the first rotating shaft 5rs) so that the first return spring 90 is further compressed, and the overtravel force provided by the first return spring 90 (i.e., the force to keep the moving contact 52 and the static contact 520 in reliable contact) is obtained until the handle 1 reaches the closed position C (to be precise, as shown in the figure). Figure 7 As shown, the operating arm 10 of the handle 1 is parked at the closing position C), at which time the four-bar linkage is in a force balance state, so that the moving contact 52 and the static contact 520 remain in a closed state, and the circuit breaker enters a closed state. Figure 8 As shown, when a short circuit fault or an overload fault occurs, the short circuit protection mechanism 9 or the overload protection mechanism 6 can drive the lock buckle 7 to rotate counterclockwise, so that the lock buckle mating end 700 releases the lock buckle mating end 410, and the first reset spring 90 drives the moving contact piece 5 to rotate counterclockwise, and the moving contact piece 5 drives the trip buckle 4 to rotate counterclockwise around the first rear end 21 of the primary connecting rod 2 through the secondary connecting rod 3, and the moving contact 52 and the static contact 520 are disconnected, and then the second reset spring 92 drives the lock buckle 7 to rotate clockwise and reset. At this time, the handle 1 is moved in the opening direction, and the handle 1 drives the trip buckle 4 to rotate clockwise around the left end of the secondary connecting rod 3 through the primary connecting rod 2 to reset, and the circuit breaker enters the opening state. Preferably, combined with Figure 8 and 2As shown, the circuit breaker operating mechanism of the present invention also includes a handle reset spring. When the trip latch 4 and the lock latch 7 are released from the lock fit, the second reset spring 92 drives the lock latch 7 to rotate clockwise and reset. At the same time, the first connecting rod 2 no longer applies a force to the handle 1, and the handle 1 rotates to the opening position O under the action of the handle reset spring (this action process is slower than the action of the moving contact member 5), and at the same time, the trip latch 4 is pulled to rotate clockwise and reset. When the trip latch mating end 410 of the trip latch 4 rotates past the lock mating end 700 of the lock latch 7, a mating gap appears between the two again.

[0050] Preferably, the trip button 4 also includes an opening indication surface and a closing indication surface arranged on one side thereof, and an indication hole cooperating with the opening indication surface and the closing indication surface is arranged on the housing H; when the circuit breaker is closed, the handle 1 rotates and drives the four-bar mechanism to rotate through the primary connecting rod 2, so that the closing indication surface is opposite to the indication hole; when the circuit breaker is tripped, the moving contact member 5 drives the trip button 4 to rotate through the secondary connecting rod 3, so that the opening indication surface is opposite to the indication hole. Specifically, as Figure 2 In the direction shown, when the circuit breaker is closed, the four-bar linkage rotates clockwise as a whole, so that the closing indication surface is opposite to the indication hole. When the circuit breaker is tripped, the trip button 4 rotates counterclockwise around the first rear end 21, and the opening indication surface is opposite to the indication hole.

[0051] Preferably, Fig. 9 FIG. 1 is an embodiment of the lock buckle 7 .

[0052] The lock catch 7 is a Y-shaped structure, which includes a matching arm 70, a short-circuit driving arm 71 drivingly matched with the short-circuit protection mechanism 9, and an overload driving arm 72 drivingly matched with the overload protection mechanism 6. One end of the matching arm 70 is provided with a lock matching end 700, and the other end is respectively connected to the short-circuit driving arm 71 and the overload driving arm 72 by bending; the matching arm 70 is pivotally arranged on the housing H through the first rotating shaft 5rs. Further, as Fig. 9 As shown, a lock buckle shaft hole is provided in the middle of the matching arm 70, and the lock buckle 7 is rotatably arranged on the first rotating shaft 5rs through the lock buckle shaft hole. Fig. 9 As shown, the lock 7 also includes a lock positioning portion, which is arranged at the free end of the mating arm 70 and located on one side of the lock mating end 700. The second reset spring 92 drives the lock 7 to rotate and reset, so that the lock positioning portion is close to the side wall of the slide groove 8 (as a lock positioning structure).

[0053] like Fig. 9 and 12 FIG. 1 is an embodiment of the moving contact member 5 .

[0054] The moving contact member 5 is a V-shaped structure, comprising a moving contact connecting portion 50 and a moving contact contact portion 51 connected by bending, a waist-shaped hole 53 is provided at one end of the moving contact connecting portion 50 connected to the moving contact contact portion 51, and the other end of the moving contact connecting portion 50 is connected to a moving contact connecting hole 55 rotatably connected to the secondary connecting rod 3, and a moving contact point 52 is provided at the free end of the moving contact contact portion 51. Further, as Fig.12 As shown, a spring limiting protrusion 54 is formed on one side of the moving contact connecting portion 50. Further, the moving contact member 5 also includes a protrusion structure 56, which is arranged on one side of the connection between the moving contact connecting portion 50 and the moving contact contact portion 51 and extends toward the direction where the lock catch 7 is located.

[0055] Specifically, Fig.12 In the direction shown, the upper end of the moving contact connecting part 50 is provided with a moving contact connecting hole 55, the lower end is connected to the upper end of the moving contact contact part 51 by a bend and is provided with a waist-shaped hole 53, the spring limiting protrusion 54 is arranged on the right edge of the moving contact connecting part 50, the moving contact point 52 is arranged on the left side of the lower end of the moving contact contact part 51, and the protrusion structure 56 is arranged on the left side of the moving contact member 5, below the waist-shaped hole 53.

[0056] Preferably, Fig. 9 As shown, a spring limiting groove 90 a is provided on the housing H, one end of the first return spring 90 is sleeved on the spring limiting protrusion 54 , and the other end is arranged in the spring limiting groove 90 .

[0057] Preferably, Fig.10 and 11 As shown, the first connecting rod 2 and the secondary connecting rod 3 are both U-shaped structures; the first connecting rod 2 includes a first connecting portion 23, a first front end 20 and a first rear end 21, the first front end 20 and the first rear end are respectively connected to the two ends of the first connecting portion 23 by bending, and the first rear end 21 is longer than the first front end 20; the secondary connecting rod 3 includes a second connecting portion 33, a second front end 30 and a second rear end 31, the second front end 30 and the second rear end 31 are respectively connected to the two ends of the second connecting portion 33 by bending, and the first rear end 31 is longer than the first front end 30.

[0058] like Fig. 9 and 13 FIG. 1 is a specific example of a first embodiment of the operating mechanism of the circuit breaker of the present invention.

[0059] like Fig. 9 In the direction shown, the housing H includes a base and a cover, a handle 1 is pivotally arranged at the upper end of the housing H, and an operating arm 10 at one end of the handle 1 protrudes outside the housing H for user operation, a trip button 4, a lock button 7, a moving contact piece 5, and a first return spring 9 are all located on the right side of the handle 1, the trip button 4 is located above the lock button 7 and the moving contact piece 5 and between the upper end of the lock button 7 and the upper end of the moving contact piece 5, and a slide slot 8 (as shown in FIG. Fig.13As shown) is arranged on the base and is located on one side of the trip latch 4, the moving contact piece 5 and the lock catch 7 are stacked between the base and the cover in sequence, and are both pivotally arranged on the base through the first rotating shaft 5rs, the first reset spring 9 is arranged on the right side of the moving contact piece 5, the left end is connected to the moving contact piece 5, and the right end is connected to the shell H; the first front end 20 and the first rear end 21 of the first connecting rod 2 are respectively inserted into the handle 1 and the middle of the trip latch 4 from the thickness direction of the shell H, and the two ends of the secondary connecting rod 3 are respectively inserted into the right end of the trip latch 4 and the upper end of the moving contact piece 5 from the thickness direction of the shell H. Further, the moving contact piece 5 is made of plate metal, and the thickness of the lock catch 7 and the moving contact piece 5 stacked together is less than 5.5mm. Further, as Fig. 9 As shown, the first front end 20 and the first rear end 21 of the first connecting rod 2 are respectively inserted into the handle 1 and the middle of the jumper 4 from the direction of the cover, and the two ends of the secondary connecting rod 3 are respectively inserted into the right end of the jumper 4 and the upper end of the moving contact member 5 from the direction of the cover.

[0060] The operating mechanism of the circuit breaker of the present invention has a simple matching structure among its components, a reasonable and concise structural hierarchy, and is convenient for mechanized large-scale production.

[0061] like Figure 1 FIG. 2 shows a second embodiment of the operating mechanism of the circuit breaker of the present invention.

[0062] The operating mechanism of the circuit breaker of this embodiment is different from the operating mechanism of the circuit breaker of the first embodiment in that the lock catch 7 is pivotally arranged on the housing via the second rotating shaft 7rs, and the center of the slide slot 8 is located on the axis of the second rotating shaft 7rs.

[0063] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An operating mechanism of a circuit breaker, characterized in that: It comprises a handle (1), a primary connecting rod (2), a secondary connecting rod (3), a trip buckle (4), a moving contact piece (5), a lock buckle (7) and an arc-shaped slide groove (8) arranged in a housing (H) of a circuit breaker; The handle (1) is pivotally arranged on the housing (H); the first front end (20) of the first connecting rod (2) is rotationally connected to one end of the handle (1); the first rear end (21) of the first connecting rod (2) is rotationally connected to the middle part of the jump buckle (4) and slidably matched with the slide groove (8); one end of the jump buckle (4) is rotationally connected to one end of the secondary connecting rod (3); the jump buckle matching end (410) of the jump buckle (4) is used for locking with the lock matching end (700) at one end of the lock buckle (7); the middle part of the lock buckle (7) is pivotally arranged on the housing (H); the other end of the secondary connecting rod (3) is rotationally connected to one end of the moving contact member (5); the moving contact member (5) is rotationally arranged on the first rotating shaft (5rs) through a waist-shaped hole (53) provided in the middle part; and the other end of the moving contact member (5) is provided with a moving contact point (52).

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The slide groove (8) is in an arc shape, and the center of the slide groove (8) is located on the rotation axis of the lock buckle (7).

3. The operating mechanism of the circuit breaker according to claim 1, characterized in that: When the circuit breaker is in an open state, the jumper mating end (410) and the lock mating end (700) are arranged opposite to each other, and a mating gap (G) is provided between the jumper mating end (410) and the lock mating end (700). When the handle (1) drives the operating mechanism to close the circuit, the jumper mating end (410) and the lock mating end (700) are locked and mated.

4. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The slide groove (8) is arranged on the housing (H) and is an integral structure therewith; the first rear end (21) passes through the jump buckle (4) and is inserted into the slide groove (8) to slideably cooperate with the housing (H).

5. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The handle (1) rotates and drives the first rear end (21) to move along the slide groove (8), and the first rear end (21) drives the trip latch (4) to rotate, so that the trip latch mating end (410) and the lock latch mating end (700) are locked and mated, and at the same time, the secondary connecting rod (3), the trip latch (4), the moving contact piece (5) and the lock latch (7) form a four-bar linkage mechanism that is relatively stationary and rotates synchronously with each other, until the moving contact (52) and the static contact (520) of the circuit breaker are initially in contact, and the handle (1) continues to rotate to the closing position, driving the moving contact piece (5) to swing with the static contact (520) as a fulcrum, and the waist-shaped hole (53) moves relative to the first rotating shaft (5rs), and the circuit breaker enters the closing state.

6. The operating mechanism of the circuit breaker according to claim 5, characterized in that: It also includes a first reset spring (90) for driving the movable contact member (5) to reset, and a second reset spring (92) for driving the lock catch (7) to reset, and the other end of the lock catch (7) is used to drive and cooperate with the protection mechanism of the circuit breaker; When a fault occurs, the protection mechanism drives the lock catch (7) to rotate, so that the lock catch mating end (700) releases the lock catch mating end (410), and the first reset spring (90) drives the moving contact piece (5) to rotate, so that the moving contact (52) and the static contact (520) are disconnected. At the same time, the moving contact piece (5) drives the trip catch (4) to rotate around the first rear end (21) through the secondary connecting rod (3), and the circuit breaker enters a tripping state. After the circuit breaker trips, the second reset spring (92) drives the lock catch (7) to rotate and reset.

7. The operating mechanism of the circuit breaker according to claim 6, characterized in that: The moving contact member (5) comprises a moving contact connecting portion (50) and a moving contact contact portion (51) respectively arranged at two ends thereof; one end of the moving contact connecting portion (50) is rotatably connected to the secondary connecting rod (3); the other end is provided with a waist-shaped hole (53) and is bent and connected to one end of the moving contact contact portion (51); the other end of the moving contact contact portion (51) is provided with a moving contact point (52); one end of a first return spring (90) is connected to the housing (H) and the other end is connected to the moving contact connecting portion (50).

8. The operating mechanism of the circuit breaker according to claim 6, characterized in that: The protection mechanism comprises a short-circuit protection mechanism (9) and an overload protection mechanism (6); the lock (7) is a Y-shaped structure, comprising a matching arm (70), a short-circuit drive arm (71) driven and matched with the short-circuit protection mechanism (9), and an overload drive arm (72) driven and matched with the overload protection mechanism (6); one end of the matching arm (70) is provided with a lock matching end (700), and the other end is respectively bent and connected to the short-circuit drive arm (71) and the overload drive arm (72); the matching arm (70) is pivotally arranged on the housing (H).

9. The operating mechanism of the circuit breaker according to claim 5, characterized in that: The trip button (4) further comprises an opening indication surface and a closing indication surface arranged on one side thereof, and an indication hole cooperating with the opening indication surface and the closing indication surface is arranged on the housing (H); when the circuit breaker is closed, the handle (1) rotates and drives the four-bar mechanism to rotate through the primary connecting rod (2), so that the closing indication surface is opposite to the indication hole; when the circuit breaker is tripped, the moving contact member (5) drives the trip button (4) to rotate through the secondary connecting rod (3), so that the opening indication surface is opposite to the indication hole.

10. The operating mechanism of the circuit breaker according to claim 5, characterized in that: The operating mechanism of the circuit breaker also includes a moving contact limit platform (7a) for limiting the rotation angle of the moving contact member (5) when the moving contact (52) and the stationary contact (520) are disconnected; the operating mechanism of the circuit breaker also includes a lock catch positioning structure, a second reset spring (92) drives the lock catch (7) to rotate and reset, so that the lock catch (7) is closely against the lock catch positioning structure, and the moving contact limit platform (7a) and the lock catch positioning structure are both arranged on the housing (H).

11. The operating mechanism of the circuit breaker according to claim 3, characterized in that: When the switch is opened, the jumper fitting end (410) of the jumper (4) is located above the lock fitting end (700) of the lock (7) and is provided with a fitting gap (G); when the switch is closed, the handle (1) drives the jumper (4) to rotate through the first connecting rod (2), so that the jumper fitting end (410) moves toward the lock fitting end (700) to eliminate the fitting gap (G) and make the jumper (4) and the lock (7) lock fitting.

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