Circuit breaker

Abstract

The circuit breaker comprises a shell, an operating mechanism, a contact mechanism, a motor transmission mechanism and an indicating mechanism, the operating mechanism drives a rotating shaft of the contact mechanism to perform opening and closing rotation, a tripping button slidably assembled in a button hole of the shell drives a traction rod to trigger the operating mechanism to trip, and the motor transmission mechanism comprises a rotating wheel and a transmission rod. The operating mechanism is driven by the transmission rod to perform opening and closing swing, the indicating mechanism comprises an indicating piece and two microswitches, the indicating piece is driven by the rotating shaft or the transmission rod in a matched mode to swing, and the two microswitches are triggered by the rotating wheel and the indicating piece respectively. The state of mutual combination of the two microswitches and the identification corresponding to the indicating piece in the indicating hole are used for indicating the closing, opening or tripping state of the circuit breaker. According to the utility model, the indicating piece and the two microswitches can respectively feed back the state of the circuit breaker, when the indicating state of the two microswitches is inconsistent with the indicating state of the indicating piece, the circuit breaker can be judged to be in a failure state, the structure is simple, and the indication is accurate.

Description

Technical Field

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

[0002] With the development of power system automation and power equipment intelligence, power equipment is gradually realizing automated, information-based, and intelligent identification and control such as remote control, remote signaling, and remote measurement, while ensuring reliable installation. As a key component of switchgear, reclosing circuit breakers need to meet the requirements of remote operation.

[0003] During operation, reclosing circuit breakers typically exist in three states: open, closed, and tripped. Intelligent identification and control requires clear status indications to distinguish these states. However, in existing products, reclosing products usually only have two identifiable indication states: open and closed, or the status of the reclosing product is indirectly indicated by the internal signal operation of the reclosing transmission mechanism. When the reclosing circuit breaker trips due to a fault or the transmission mechanism fails, the indications are inaccurate and the three status information cannot be fed back in a timely and correct manner. Summary of the Invention

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide a circuit breaker.

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

[0006] This utility model provides a circuit breaker, including a housing and a button hole and an indicator hole disposed in the housing. An operating mechanism and a contact mechanism are provided inside the housing. The operating mechanism drives a rotating shaft in the contact mechanism to rotate for opening and closing. A trip button is slidably mounted in the button hole. Pressing the trip button rotates a pull rod mounted on one side of the operating mechanism to trigger the operating mechanism to trip.

[0007] The housing is also equipped with a motor drive mechanism and an indicator mechanism. The motor drive mechanism includes a rotating wheel and a transmission rod that swings with the rotating wheel. The transmission rod drives the operating mechanism to swing open and close. The indicator mechanism includes an indicator and two microswitches. The indicator is rotatably assembled and driven to swing by a rotating shaft or transmission rod. The two microswitches are triggered by the rotating wheel and the indicator respectively. The combined state of the two microswitches and the markings on the indicator corresponding to the indicator holes are used to indicate the closed, open, or tripped state of the circuit breaker.

[0008] Preferably, in the closed or open position, one microswitch remains closed while the other remains open, and the indicator is driven to rotate, causing the closed or open indicator to be displayed in the indicator hole.

[0009] When in the tripped position, both microswitches remain open, causing the tripped indicator to be displayed in the indicator hole.

[0010] Preferably, the tripping position is divided into three stages: before the tripping limit position, the tripping limit position, and beyond the tripping limit position. Before the transmission rod is driven to the tripping limit position, the transmission rod blocks the tripping button from pressing the traction rod, so that the operating mechanism cannot trip.

[0011] Preferably, the transmission rod is provided with a tripping limit part. Before the transmission rod is driven to the tripping limit position, the tripping limit part blocks the movement trajectory of the tripping button. After the transmission rod is driven to the tripping limit position and passes the tripping limit position, the tripping limit part moves out of the movement trajectory of the tripping button.

[0012] Preferably, the motor transmission mechanism includes a motor, a first drive hole is provided in the middle of the rotating wheel, the output shaft of the motor passes through the first drive hole, the output shaft of the motor is provided with a drive shaft, and the drive shaft cooperates with the first drive hole to drive the rotating wheel to rotate for opening or closing the circuit.

[0013] Preferably, the edge contour of the first driving hole includes two rotationally symmetrical arcuate involutes, so that the hole wall of the first driving hole forms two rotationally symmetrical driving platforms. The output shaft of the motor is provided with a drive shaft that can elastically extend and retract. The end face of the drive shaft slides and elastically extends and retracts with the hole wall of the first driving hole corresponding to the arcuate involute. When the end of the drive shaft engages with the driving platform, it drives the wheel to rotate.

[0014] Preferably, before the limit position of the circuit breaker is opened, the end of the drive shaft slides along the wall of the arc-shaped involute of the first drive hole, and after passing the limit position of the circuit breaker, the end of the drive shaft engages with the drive platform.

[0015] Preferably, the output shaft of the motor is provided with a mounting hole, the mounting hole is arranged radially along the output shaft of the motor and a drive shaft is assembled in the mounting hole, a drive elastic element is provided between the drive shaft and the mounting hole, the drive elastic element deforms axially along the mounting hole, so that the drive shaft moves in the mounting hole.

[0016] Preferably, the output shaft of the motor is further provided with a positioning shaft, which is arranged radially through the output shaft of the motor, so that both ends of the positioning shaft abut against the wheel to restrict the axial movement of the output shaft of the motor and the wheel.

[0017] Preferably, the positioning shaft is a hollow shaft, and the hollow shaft has an elastic notch along a direction parallel to the positioning shaft. The elastic notch elastically contracts when the positioning shaft comes into contact with the rotating wheel.

[0018] Preferably, the microswitch triggered by the rotary wheel is a first microswitch, and the microswitch triggered by the indicator is a second microswitch.

[0019] When the circuit is in the closed position, the first microswitch is open and the second microswitch is closed.

[0020] When the circuit is in the open position, the second microswitch is open, and the first microswitch is closed.

[0021] When in the tripped position, both the first micro switch and the second micro switch are disconnected.

[0022] Preferably, the edge of the rotating wheel forms a first curved surface and a second curved surface for triggering the first micro switch. The first curved surface is used to press the button of the first micro switch to close, and the second curved surface is used to provide a reset space for the button of the first micro switch. The radius of the second curved surface is smaller than the radius of the first curved surface.

[0023] Preferably, the indicator is provided with a trigger part for controlling the second micro switch.

[0024] Preferably, the rotating wheel has a first drive hole in the middle, a connecting shaft is provided on one side of the rotating wheel with the first drive hole, one end of the transmission rod is connected to the connecting shaft, and the other end of the transmission rod has a second drive hole for driving the operating mechanism to open and close the brake.

[0025] When the circuit is closed, the axis connecting the first drive hole, the second drive hole, and the connecting shaft is on the same straight line, and the connecting shaft is located between the first drive hole and the second drive hole.

[0026] When the circuit is in the limit position of tripping, the axis connecting the first drive hole, the second drive hole and the connecting shaft is on the same straight line, and the first drive hole is located between the connecting shaft and the second drive hole;

[0027] When in the disengaged position, the lines connecting the first drive hole, the second drive hole, and the axis of the connecting shaft are not on the same straight line.

[0028] Preferably, the transmission rod includes a strip-shaped body, one end of which is provided with a connection hole for connecting with a rotating wheel, and the other end of which is provided with a second drive hole. The edge of the other end of the body extends outward to form a release limiting part, which is used to limit the pressing stroke of the release button. The edge of the other end of the body bends forward to form a crank arm, and the crank arm and the release limiting part are located on opposite sides of the other end of the body, respectively, and the indicator is pushed by the crank arm.

[0029] Preferably, the indicator includes a cylindrical rotating part, which is rotatably mounted inside the housing via the rotating part. A sector-shaped body is connected to one side of the rotating part, and the sector-shaped body cooperates with the crank arm of the transmission rod. The sector-shaped surface of the sector-shaped body serves as the indicator part. The arc surface of the indicator part is sequentially provided with a closing mark, a closing mark, and a tripping mark corresponding to the indicator hole. The rotating part extends radially outward to form a drive arm, which cooperates with a drive groove provided on the rotating shaft. The rotating part is provided with a trigger part that cooperates with one of the micro switches.

[0030] Preferably, a connecting section is provided between the rotating part and the fan-shaped body, and a swing limiting part is provided on the connecting section. The swing limiting part cooperates with the outer shell to limit the swing range of the indicator. An indicator reset member is sleeved between the rotating part and the outer shell, and the two ends of the indicator reset member elastically abut against the indicator and the inner shell, respectively.

[0031] Preferably, a bracket is provided inside the housing, the indicator is rotatably mounted on the bracket, and a micro switch triggered by the indicator is provided on the bracket.

[0032] Preferably, the trip button includes a button body, one end of which extends out of the button hole, a boss structure protruding from the middle of the button body, and the other end of the button body located inside the outer shell and fitted with a button reset component. A protruding positioning plate is provided in the middle of the button body, and the transmission rod cooperates with the positioning plate to restrict the trip button from triggering the traction rod.

[0033] Preferably, the indicator is switched between the open and closed positions by the rotating shaft, and the indicator is rotated from the tripped position to the open position by the transmission rod.

[0034] Preferably, the operating mechanism includes a pair of spaced-apart side plates, with a rocker arm rotatably mounted between the side plates. The rocker arm is provided with an operating shaft, which cooperates with the second drive hole of the transmission rod. The rocker arm drives the rotating shaft to rotate through a connecting rod assembly.

[0035] The circuit breaker of this utility model has an indicator and two microswitches that can respectively provide feedback on the three states of the circuit breaker: closed, open, and tripped. When the indication state of the two microswitches does not match the indication state of the indicator, it can be determined that the circuit breaker is in a failure state. It has the advantages of simple structure, low cost, and accurate indication.

[0036] In addition, the transmission rod can block the trip button before it is turned to the limit position, which can limit the trip and ensure the reliability of the product.

[0037] In addition, the first drive hole is elastically matched with the drive shaft, so that the motor can drive the wheel to rotate when rotating in the forward direction, but cannot drive the wheel to rotate when rotating in the reverse direction, which has the advantages of convenient operation and prevention of reverse operation.

[0038] In addition, the elastic notch of the positioning shaft undergoes elastic contraction, allowing the positioning shaft and the rotating wheel to elastically abut against each other, which helps to ensure stable fit during installation. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the circuit breaker of this utility model;

[0040] Figure 2 This is a schematic diagram of the structure of the motor transmission mechanism, the indicating mechanism, and the trip button in this utility model;

[0041] Figure 3 This is a schematic diagram of the motor transmission mechanism and the trip button in this utility model;

[0042] Figure 4 This is a schematic diagram of the trip button in this utility model;

[0043] Figure 5 This is a schematic diagram of the structure of the motor transmission mechanism, the indicating mechanism, and the rotating shaft in this utility model;

[0044] Figure 6 This is a schematic diagram of the structure of the motor transmission mechanism and the trip button in this utility model. Figure 1 ;

[0045] Figure 7 This is a schematic diagram of the structure of the motor transmission mechanism and the trip button in this utility model. Figure 2 ;

[0046] Figure 8 This is a schematic diagram of the indicating mechanism and rotating shaft in this utility model;

[0047] Figure 9 This is a schematic diagram of the cooperation between the rotating wheel and the transmission rod in the closed position in this utility model;

[0048] Figure 10 This is a schematic diagram of the engagement of the rotary wheel and transmission rod before the tripping limit position in this utility model;

[0049] Figure 11 This is a schematic diagram of the cooperation between the rotating wheel and the transmission rod at the limit position of the tripping circuit in this utility model;

[0050] Figure 12 This is a schematic diagram of the cooperation between the rotating wheel and the transmission rod in this utility model when the circuit breaker is in the limit position.

[0051] Figure 13 This is a schematic diagram of the engagement between the rotating shaft and the transmission rod in the disengaged position in this utility model;

[0052] Figure 14 This is a schematic diagram of the structure of the rotating wheel in this utility model;

[0053] Figure 15 This is a schematic diagram of the transmission rod in this utility model;

[0054] Figure 16 This is a structural schematic diagram of the output shaft, drive shaft, and positioning shaft of the motor in this utility model;

[0055] Figure 17 This is a cross-sectional view of the output shaft, drive shaft, and positioning shaft of the motor in this utility model;

[0056] Figure 18 This is a schematic diagram of the positioning shaft in this utility model;

[0057] Figure 19 This is a schematic diagram of the structure of the indicator in this utility model;

[0058] Figure 20 This is a schematic diagram of the structure of the bracket in this utility model;

[0059] Figure 21 This is a schematic diagram of the structure of the rotating shaft in this utility model;

[0060] Figure 22 This is a schematic diagram of the trip button in this utility model;

[0061] Figure label:

[0062] 1-Outer casing, 11-Indicator hole, 12-Bracket, 121-Micro switch mounting slot, 122-Assembly shaft, 123-Swing limit slot, 21-Rock arm, 211-Operating shaft, 22-Traction rod, 23-Trigger button, 231-Positioning plate, 232-Boss structure, 3-Rotating shaft, 31-Drive slot, 311-First contact surface, 312-Second contact surface, 4-Motor transmission mechanism, 41-Motor output shaft, 42-Rotating wheel, 421-First drive hole, 4211-Arc-shaped involute, 422-Drive platform, 423-First curved surface, 424-Second Curved surface, 425-connecting hole, 43-transmission rod, 431-second drive hole, 432-disengagement limiting part, 433-crank arm, 434-connecting hole, 44-drive shaft, 45-drive elastic element, 46-positioning shaft, 461-elastic notch, 47-connecting shaft, 51-indicator, 510-sector-shaped body, 511-indicator part, 512-drive arm, 513-rotating part, 514-trigger part, 515-connecting section, 516-swing limiting part, 517-slot, 521-first micro switch, 522-second micro switch, 53-indicator reset element. Detailed Implementation

[0063] The specific embodiments of the circuit breaker of this utility model are further described below with reference to the accompanying drawings. The circuit breaker of this utility model is not limited to the descriptions in the following embodiments.

[0064] like Figure 1-7 As shown, the circuit breaker includes a housing 1, which has a button hole and an indicator hole 11. A trip button 23 is slidably mounted in the button hole. An operating mechanism and a contact mechanism are provided inside the housing 1. The operating mechanism includes a rocker arm 21, a trip latch, and a locking latch, which are rotatably mounted. During normal opening and closing, the trip latch and the locking latch are in a limiting engagement. A traction rod 22 is rotatably mounted on one side of the operating mechanism. Pressing the trip button 23 can drive the traction rod 22 to rotate and trigger the operating mechanism to trip. The contact mechanism includes a rotating shaft 3, a moving contact, and a stationary contact. The rotating shaft 3 is rotatably mounted inside the housing 1 and connected to the rocker arm 21 through a linkage assembly. The linkage assembly is also linked to the trip latch, thereby enabling the rotating shaft 3 to rotate by the operating mechanism. The moving contact is mounted on the rotating shaft 3 and moves closer to or further away from the stationary contact as the rotating shaft 3 rotates. An indicator mechanism is also provided inside the housing 1. The indicator mechanism includes a rotatably mounted indicator 51. The indicator part 511 of the indicator 51 and the indicator hole 11 are used to indicate the open or closed state of the circuit breaker.

[0065] Furthermore, such as Figure 2-7 As shown, a motor transmission mechanism 4 can also be provided inside the housing 1. The motor transmission mechanism 4 typically includes a motor and a transmission mechanism. The output shaft 41 of the motor drives the operating mechanism through the transmission mechanism, thereby driving the circuit breaker to automatically open and close.

[0066] The improvement of this application is that the motor transmission mechanism 4 includes a rotating wheel 42 and a transmission rod 43 that swings with the rotating wheel 42. The transmission rod 43 drives the operating mechanism to swing open and close. The indicating mechanism includes an indicating element 51 and two micro switches. The indicating element 51 is rotatably assembled and driven to swing by the rotating shaft 3 or the transmission rod 43. The two micro switches are triggered by the rotating wheel 42 and the indicating element 51, respectively. The combined state of the two micro switches and the marking of the indicating element 51 in the indicating hole 11 are used to indicate the closing, opening or tripping state of the circuit breaker.

[0067] Specifically, when in the closed or open position, one of the two microswitches remains closed and the other remains open, and the indicator 51 is driven to rotate so that the closed or open indicator of the indicator 51 is displayed in the indicator hole 11. When in the tripped position, the two microswitches remain open so that the tripped indicator of the indicator 51 is displayed in the indicator hole 11.

[0068] Thus, the indicator 51 and the two microswitches can respectively provide feedback on the three states of the circuit breaker: closed, open, and tripped. When the indication states of the two microswitches do not match the indication state of the indicator 51, it can be determined that the circuit breaker is in a failure state. It has the advantages of simple structure, low cost, and accurate indication.

[0069] Furthermore, the two microswitches are a first microswitch 521 and a second microswitch 522. The first microswitch 521 is triggered by the rotary wheel 42, and the second microswitch 522 is triggered by the indicator 51. In the closed position, the first microswitch 521 is open and the second microswitch 522 is closed. In the open position, the second microswitch 522 is open and the first microswitch 521 is closed. In the tripped position, both the first microswitch 521 and the second microswitch 522 are open.

[0070] Furthermore, when the transmission rod 43 is driven to the open position, the open position is specifically divided into the open limit position (see...). Figure 10 ), tripping limit positions (see Figure 2 , 3 (6 and 11) and beyond the tripping limit position (see Figure 12 The three stages can also be understood as follows: during the tripping rotation of the transmission rod 43, its rotational stroke is divided into two segments by the tripping limit position. The tripping limit position can be considered as the critical point dividing the two segments. Before the tripping limit position, the direction of movement of the transmission rod 43 is opposite to the swing direction of the rocker arm 21 during tripping. After passing the tripping limit position, the direction of movement of the transmission rod 43 is the same as the swing direction of the rocker arm 21 during tripping. Before the transmission rod 43 is driven to the tripping limit position, the transmission rod 43 prevents the tripping button 23 from being pressed. When the traction rod 22 is pressed, the trip button 23 cannot be pressed, preventing the operating mechanism from tripping. Typically, a tripping limit part 432 is provided on the transmission rod 43. Before the transmission rod 43 is driven to the opening limit position, the tripping limit part 432 blocks the movement trajectory of the trip button 23. After the transmission rod 43 is driven to and past the opening limit position, the tripping limit part 432 deviates from the movement trajectory of the trip button 23. At this point, pressing the trip button 23 can drive the traction rod 22 to rotate, thereby triggering the operating mechanism to trip. After the operating mechanism is triggered to trip, the transmission rod 43 is driven to the tripping position by the operating mechanism, and the rotating wheel 42 linked to the transmission rod 43 is also driven to rotate.

[0071] Specifically, such as Figure 2-7As shown in Figures 9, 14, and 15, the wheel 42 has a first drive hole 421 in the middle. The first drive hole 421 is used for the output shaft 41 of the motor in the motor transmission mechanism 4 to drive the wheel 42 to rotate for opening or closing. The wheel 42 on one side of the first drive hole 421 has a connecting shaft 47. One end of the transmission rod 43 is connected to the connecting shaft 47, and the other end of the transmission rod 43 has a second drive hole 431 for driving the operating mechanism to open or close. That is, the operating shaft 211 of the rocker arm 21 in the operating mechanism passes through the second drive hole 431, so that the rocker arm 21 is driven by the transmission rod 43 to perform opening and closing actions. When in the closed position, the first drive hole 421... The axes of the second drive hole 431 and the connecting shaft 47 are on the same straight line, and the connecting shaft 47 is located between the first drive hole 421 and the second drive hole 431. At the limit position of the tripping circuit, the axis connecting the first drive hole 421, the second drive hole 431 and the connecting shaft 47 is on the same straight line, and the first drive hole 421 is located between the connecting shaft 47 and the second drive hole 431. Before the limit position of the tripping circuit and after the limit position of the tripping circuit, the first drive hole 421 is still located between the connecting shaft 47 and the second drive hole 431, but the axis connecting the first drive hole 421, the second drive hole 431 and the connecting shaft 47 is not on the same straight line.

[0072] Furthermore, such as Figure 5-7 As shown in Figures 14, 16, and 17, the output shaft 41 of the motor is provided with a drive shaft 44 that has elastic extension and retraction. The edge contour line of the first drive hole 421 includes two rotationally symmetrical arc-shaped involutes 4211, so that the hole wall of the first drive hole 421 forms two rotationally symmetrical drive platforms 422. During the rotation of the motor output shaft 41, preferably, the motor output shaft 41 rotates in the same direction to drive the circuit breaker to open or close. The end face of the drive shaft 44 slides along the hole wall of the first drive hole 421 and undergoes elastic extension and retraction deformation. When the end of the drive shaft 44 abuts against the drive platform 422, it can drive the wheel 42 to rotate, thereby preventing the output shaft 41 of the motor from driving the wheel 42 to rotate when it is in reverse. The elastic extension and retraction of the drive shaft 44 can be provided with a drive elastic element 45, or the drive shaft 44 can have an elastic part, and the elastic extension and retraction can be achieved by the deformation of the elastic part.

[0073] Preferably, before the tripping limit position, the end of the drive shaft 44 slides along the hole wall of the first drive hole 421 corresponding to the arc-shaped involute 4211 to prevent tripping before the tripping limit position and avoid incorrect indication by the indicator 51 and the first micro switch 521; after passing the tripping limit position, the end of the drive shaft 44 engages with the drive platform 422, at which point the operating mechanism trips, enabling the indicator 51 and the first micro switch 521 to provide correct indication.

[0074] Combination Figure 1-22A specific embodiment of a circuit breaker is provided.

[0075] like Figure 1-4 As shown, the circuit breaker includes a housing 1, which typically includes a base and a cover that fits onto the base. The cover typically includes a middle cover and a front cover. The middle cover has an assembly space such as a connecting groove and a connecting hole. The front cover fits onto the middle cover to close the connecting groove and the connecting hole, so that the side of the middle cover facing away from the base remains flat. The front cover has an indicator hole 11 and a button hole, wherein the indicator hole 11 and the button hole respectively pass through the interior of the middle cover and the base to maintain communication. A trip button 23 is slidably installed in the button hole.

[0076] like Figure 2-8 As shown, an operating mechanism and a contact mechanism are provided within the base. The operating mechanism and contact mechanism can employ existing technology. Specifically, the operating mechanism includes a pair of spaced-apart side plates, with a rocker arm 21, a trip latch, and a locking latch rotatably mounted between the side plates. The rocker arm 21 has an operating shaft 211 that passes through a connecting slot on the middle cover. The rocker arm 21 drives the rotating shaft 3 of the contact mechanism to rotate for opening and closing via a linkage assembly. The end of the linkage assembly away from the rotating shaft 3 is also linked to the trip latch. During normal opening and closing, the trip latch... In conjunction with the locking limit, a traction rod 22 is rotatably mounted in the base on one side of the operating mechanism. Pressing the trip button 23 drives the traction rod 22, which in turn drives the locking and tripping latches to unlock, thus disengaging the operating mechanism. The rotating tripping latch drives the rotating shaft 3 to rotate via the linkage assembly. The contact mechanism includes the rotating shaft 3, a moving contact, and a stationary contact. The rotating shaft 3 is rotatably mounted in the base. The rocker arm 21 drives the rotating shaft 3 to rotate for opening and closing via the linkage assembly. The moving contact is connected to the rotating shaft 3. The moving contact separates from or contacts the stationary contact as the rotating shaft 3 rotates for opening or closing.

[0077] Furthermore, the outer casing 1 is also equipped with a motor transmission mechanism 4 and an indicating mechanism. The motor transmission mechanism 4 includes a motor and a transmission mechanism, which includes a rotating wheel 42 and a transmission rod 43. The rotating wheel 42 has a first drive hole 421 in the middle. The output shaft 41 of the motor drives the rotating wheel 42 to rotate through the first drive hole 421. In this embodiment, the output shaft 41 of the motor rotates in one direction. One end of the transmission rod 43 is connected to the rotating wheel 42, and the other end of the transmission rod 43 has a second drive hole 431. The transmission rod 43 is linked with the operating shaft 211 of the rocker arm 21 through the second drive hole 431, thereby realizing the opening and closing of the circuit breaker by the motor-driven operating mechanism; Figure 5-8As shown, the indicating mechanism includes an indicator 51 and two microswitches. The indicator 51 is rotatably mounted inside the housing 1. The swing of the indicator 51 is driven by a rotating shaft 3 or a transmission rod 43. In this embodiment, the rotating shaft 3 drives the indicator 51 to switch between the open and closed positions, and the transmission rod 43 drives the indicator 51 to rotate from the tripped position to the open position. One of the microswitches is located on one side of the indicator 51, and the indicator 51 controls the opening and closing of the microswitches. The opening and closing of the other microswitch is controlled by a rotating wheel 42. When the motor transmission mechanism 4 is in the closed or open position, the two microswitches keep one closed and the other open. The indicator 51 is driven to rotate by the rotating shaft 3, so that the closed or open indicator on the indicator 51 is displayed in the indicator hole 11. When the motor transmission mechanism 4 rotates to the tripped position, the two microswitches remain open, so that the tripped indicator on the indicator 51 is displayed in the indicator hole 11.

[0078] For ease of description, the two microswitches are designated as a first microswitch 521 and a second microswitch 522. The first microswitch 521 is controlled by the rotary wheel 42, and the second microswitch 522 is controlled by the indicator 51. In the closed position, the first microswitch 521 is open and the second microswitch 522 is closed. In the open position, the second microswitch 522 is open and the first microswitch 521 is closed. In the tripped position, both the first microswitch 521 and the second microswitch 522 are open. By collecting the signals from the two microswitches, fault information can be effectively transmitted. The signal collected by the second microswitch 522 is the actual closed and open state of the circuit breaker, clearly indicating the energized state of the circuit breaker. Of course, it is also possible for the first microswitch 521 to be closed and the second microswitch 522 to be open when the circuit is closed, and for the first microswitch 521 to be open and the second microswitch 522 to be closed when the circuit is open.

[0079] In this embodiment, a bracket 12 is disposed inside the outer casing 1. The bracket 12 is arranged side by side with the side plate of the operating mechanism. The indicator 51 is rotatably mounted on the bracket 12. The second micro switch 522 is disposed on the bracket 12. That is, as shown... Figure 20 As shown, an assembly shaft 122 for mounting the indicator 51 and a micro switch mounting slot 121 are provided on the bracket 12. The bracket 12 provides an assembly position for the indicator 51 and the second micro switch 522 to ensure the stability of the fit.

[0080] Furthermore, the tripping position is specifically divided into three stages: before the tripping limit position, the tripping limit position, and beyond the tripping limit position. Figure 2 , 6As shown in Figure 11, the tripping limit position is when the rotary wheel 42 rotates to the limit position furthest from the operating mechanism, that is, the distance between the connecting shaft 47 and the operating shaft 211 of the operating mechanism is the farthest. Correspondingly, the range of the tripping indicator in the indicator 51 is larger than that of the closing indicator and the tripping indicator, respectively. Figure 10 As shown, before the transmission rod 43 is driven to the opening limit position, the transmission rod 43 prevents the trip button 23 from pressing the traction rod 22, thus preventing the operating mechanism from tripping. Specifically, a tripping limit part 432 is provided on the transmission rod 43. Before the transmission rod 43 is driven to the opening limit position, the tripping limit part 432 blocks the movement trajectory of the trip button 23. Figure 2 , 6 As shown in Figures 11 and 12, after the transmission rod 43 is driven to the trip limit position and after it passes the trip limit position, the trip limit part 432 moves out of the movement trajectory of the trip button 23. At this time, the trip button 23 can be pressed to trip the operating mechanism.

[0081] like Figure 16 , 17As shown, the motor output shaft 41 is provided with a mounting hole. In this embodiment, the mounting hole is a blind hole. The mounting hole is arranged radially along the output shaft, and a drive shaft 44 is assembled in the mounting hole. A first drive hole 421 is opened in the middle of the wheel 42. The motor output shaft 41 passes through the first drive hole 421. The drive shaft 44, which is provided on the motor output shaft 41, cooperates with the first drive hole 421, thereby driving the wheel 42 to rotate for opening and closing the brake. In this embodiment, a drive elastic element 45 is provided in the mounting hole. The drive elastic element 45 can be a... A segmented spring and a driving elastic element 45 are located between one end of the drive shaft 44 and the mounting hole. The driving elastic element 45 can deform axially along the mounting hole, causing the drive shaft 44 to move within the mounting hole. This can be understood as the drive shaft 44 performing linear telescoping within the mounting hole along its own axial direction (or the radial direction of the motor's output shaft 41). The edge contour of the first drive hole 421 includes two rotationally symmetrical arcuate involutes 4211, forming two rotationally symmetrical drive platforms 422 on the hole wall of the first drive hole 421. The drive shaft 44... The end face can slide along the wall of the arcuate involute 4211 corresponding to the first drive hole 421. When the end face of the drive shaft 44 slides along the area corresponding to the arcuate involute 4211, the drive elastic element 45 undergoes elastic deformation, keeping the end face of the drive shaft 44 in close contact with the side wall of the first drive hole 421. That is, during the sliding process, the drive shaft 44 gradually extends and retracts under the action of the drive elastic element 45. When the end of the drive shaft 44 engages with the drive platform 422, it drives the rotating wheel 42 to rotate. That is, when the motor outputs... When shaft 41 rotates in the forward direction, the end of drive shaft 44 gradually extends out of the mounting hole along the first drive hole 421 until the end of drive shaft 44 abuts against drive table 422, thereby driving the rotating wheel 42 to rotate. When the output shaft 41 of the motor rotates in the reverse direction, the end of drive shaft 44 gradually retracts into the mounting hole, and eventually the end of drive shaft 44 can no longer abut against drive table 422, thus failing to drive the rotating wheel 42 to rotate. This avoids driving the rotating wheel 42 in the reverse direction. Such a structure is relatively simple, convenient to operate, and can effectively prevent reverse operation.

[0082] Furthermore, such as Figure 16-18 As shown, the motor output shaft 41 is also provided with a positioning shaft 46, which is arranged radially through the motor output shaft 41, so that both ends of the positioning shaft 46 abut against the wheel 42 to restrict the axial movement of the motor output shaft 41 and the wheel 42. Preferably, as shown... Figure 16 As shown, the positioning shaft 46 is a hollow shaft with an elastic notch 461 along a direction parallel to it. The elastic notch 461 elastically contracts when the positioning shaft 46 abuts against the rotating wheel 42, thereby achieving a tight assembly effect. In this embodiment, the axes of the positioning shaft 46 and the drive shaft 44 are parallel to each other on the same plane.

[0083] like Figure 2 ,3 As shown in Figures 6, 9, and 15, a connecting shaft 47 is provided on one side of the first drive hole 421 of the rotating wheel 42. One end of the transmission rod 43 is connected to the connecting shaft 47, and the other end of the transmission rod 43 is provided with a second drive hole 431. The operating shaft 211 of the rocker arm 21 passes through the second drive hole 431. When the rotation is driven, the rocker arm 21 is driven to swing open and close the brake via the transmission rod 43. When the motor transmission mechanism 4 is driven to the closed position, the axis connecting the first drive hole 421, the second drive hole 431, and the connecting shaft 47 is on the same straight line, and the connecting shaft 47 is located at the first drive hole 421. Between the first drive hole 421 and the second drive hole 431, at the trip limit position, the axis connecting the first drive hole 421, the second drive hole 431 and the connecting shaft 47 are on the same straight line. At this time, the first drive hole 421 is located between the connecting shaft 47 and the second drive hole 431. Before or after the trip limit position, the axis connecting the first drive hole 421, the second drive hole 431 and the connecting shaft 47 are not on the same straight line. When the transmission rod 43 rotates to the trip position, the axis connecting the first drive hole 421, the second drive hole 431 and the connecting shaft 47 are not on the same straight line.

[0084] like Figure 3-7 As shown in Figure 15, the transmission rod 43 is also provided with a crank arm 433 and a release limiting part 432. The crank arm 433 faces the side of the indicator 51. When the transmission rod 43 is driven to rotate, the crank arm 433 can drive the indicator 51 to swing. The release limiting part 432 is located on the side of the transmission rod 43 facing the release button 23. The release limiting part 432 can limit the pressing stroke of the release button 23.

[0085] Preferably, the trip button 23 is provided with a protruding positioning plate 231 (see...). Figure 3 , 4 , 7, 9-13 and 22), in Figure 9-13 In this configuration, the trip button 23 and the indicator 51 are located on opposite sides of the transmission rod 43. This can be understood as the trip button 23 and the indicator 51 being located on opposite sides of the axis of the transmission rod 43. The extension direction of the positioning plate 231 is parallel to the axis of the transmission rod 43. When the brake is closed, the axis connecting the first drive hole 421, the second drive hole 431, and the connecting shaft 47 is on the same straight line, and the connecting shaft 47 is located between the first drive hole 421 and the second drive hole 431, so that the straight distance between the operating shaft 211 and the output shaft 41 of the motor is maximized (the straight distance parallel to the axis of the transmission rod 43 is maximized). At this time, the trip limit part 432 is separated from the positioning plate 231, and the distance is maximized.

[0086] At the limit position of the tripping circuit, the axis connecting the first drive hole 421, the second drive hole 431, and the connecting shaft 47 is on the same straight line. At this time, the first drive hole 421 is located between the connecting shaft 47 and the second drive hole 431, making the straight-line distance between the operating shaft 211 and the output shaft 41 of the motor the smallest (the straight-line distance parallel to the axis of the transmission rod 43 is the smallest). At this time, the tripping limit part 432 and the positioning plate 231 are in a state of just separation. Since the tripping process, the rotating wheel 42 rotates in the same direction (see...). Figure 9-12 (The direction of rotation can be known from the continuous rotation process). Before or after the tripping limit position, the axis connecting the first drive hole 421, the second drive hole 431 and the connecting shaft 47 are not on the same straight line. Before and after the tripping limit position, the axis of the transmission rod 43 deviates from the extension direction of the positioning plate 231. That is, the tripping limit part 432 will be closer to or further away from the positioning plate 231.

[0087] Before the transmission rod 43 is driven to the trip limit position, the trip limit part 432 is located on the travel of the positioning plate 231. At this time, if the trip button 23 is pressed, the trip limit part 432 and the positioning plate 231 cooperate to prevent the trip button 23 from being pressed down, thus preventing the traction rod 22 from being driven to rotate and avoiding the tripping of the operating mechanism. If the operating mechanism is put into the tripping state before reaching the trip limit position, the rocker arm 21 and the transmission rod 42 with opposite directions of movement will restrict each other, causing the indicator 51 and the second micro switch 522 to be inaccurate. When the transmission rod 43 is driven to the trip limit position or exceeds the trip limit position, the positioning plate 231 moves out of the movement trajectory of the trip button 23. At this time, pressing the trip button 23 can drive the traction rod 22 to rotate, thereby causing the operating mechanism to trip. At this time, the movement direction of the tripping rocker arm 21 is the same as the movement direction of the transmission rod 42, and they cannot restrict each other, ensuring that the indicator 51 and the second micro switch 522 can indicate correctly.

[0088] In this embodiment, as Figure 5-7As shown in Figure 19, the indicating mechanism includes an indicating element 51, a first micro switch 521, and a second micro switch 522. The indicating element 51 is rotatably mounted on the bracket 12. A drive arm 512 is provided at one end of the indicating element 51 near the base. The drive arm 512 engages with a drive groove 31 located on the rotating shaft 3. The drive groove 31 is an approximately right-angled groove and includes two contact surfaces connected by an arc surface. During normal opening and closing of the contact mechanism, the drive arm 512 of the indicating element 51 is located in the drive... The drive arm 51 is located inside the groove 31 and abuts against the contact surface. That is, the drive groove 31 includes a first contact surface 311 and a second contact surface 312. During the opening and closing process, the drive arm 512 cooperates with the first contact surface 311 and the second contact surface 312 respectively. As the rotating shaft 3 rotates during opening and closing, the drive groove 31 drives the indicator 51 to swing through the drive arm 512. When the operating mechanism is driven to trip, the drive arm 512 separates from the drive groove 31. That is, both contact surfaces of the drive arm 512 and the drive groove 31 are in a separated state.

[0089] The indicator 51 has an indicator part 511 near the end of the face cover. The indicator part 511 has a closed indicator, an open indicator, and a tripped indicator in sequence. The open indicator occupies a larger area to match the three stages of the open position. The second micro switch 522 is fixedly mounted on one side of the indicator 51. Figure 8 In this configuration, the second micro switch 522 is fixedly disposed near the closing indicator. The indicator 51 is provided with a trigger part 514. When the trigger part 514 presses the button of the second micro switch 522, the second micro switch 522 closes, and the trigger part 514 separates from the button of the second micro switch 522, causing the second micro switch 522 to open. The first micro switch 521 is fixedly disposed on one side of the rotating wheel 42. The button of the first micro switch 521 is triggered by the circumferential side wall of the rotating wheel 42. Preferably, the edge of the rotating wheel 42... A first curved surface 423 and a second curved surface 424 are formed. The first curved surface 423 is used to press the button of the first micro switch 521 to close. Preferably, the length of the first curved surface 423 is larger to match the three stages of the open position. The second curved surface 424 is used to provide reset space for the button of the first micro switch 521. The radius of the second curved surface 424 is smaller than the radius of the first curved surface 423. Of course, the first curved surface 423 can also be a convex surface and the second curved surface 424 can be a concave surface. The specific form is not limited.

[0090] Combination Figure 2 , 3 6 and 14 provide a structure for the wheel 42 applied in this embodiment, such as Figure 14 As shown, the rotating wheel 42 includes a disc-shaped body, and the edge of the disc-shaped body includes a first curved surface 423 and a second curved surface 424. Figure 14In the first curved surface 423, there is a first arc surface. The second curved surface 424 is divided into two second arc surfaces. The two second arc surfaces are symmetrically distributed on opposite sides of the first arc surface. The arc length of the first arc surface is greater than the sum of the arc lengths of the two second arc surfaces. The longer arc length of the first arc surface is conducive to satisfying the three stages when the switch is open. The radius of the second arc surface is smaller than the radius of the first arc surface, so that one end of each second arc surface is connected to one end of the adjacent first arc surface through a straight surface. When the wheel 42 rotates, the first curved surface 423 presses the button of the first micro switch 521, and the second curved surface 424 provides the reset space for the button of the first micro switch 521.

[0091] A nearly circular boss protrudes axially from the center of the disc-shaped body. A first drive hole 421 is provided in the center of the boss, penetrating the disc-shaped body. The edge contour of the first drive hole 421 includes two rotationally symmetrical arcuate involutes 4211, so that the side plate of the first drive hole 421 forms two rotationally symmetrical drive platforms 422. The connecting line between the two drive platforms 422 passes through the axis of the first drive hole 421. The output shaft 41 of the motor passes through the first drive hole 421, and the drive shaft 44 of the motor is coaxial with the first drive hole 421. The disc-shaped body is provided with a connecting part, which is located between two second arc surfaces and extends outward in a direction away from the first curved surface 423. A connecting hole 425 is provided on the connecting part, which is located on one side of the first drive hole 421. The connecting line between the two limiting platforms and the axis connecting the first drive hole 421 and the connecting hole 425 are collinear. A connecting shaft 47 is installed in the connecting hole 425, thereby connecting the transmission rod 43 and the rotating wheel 42 together.

[0092] Combination Figure 2 , 3 5-7 and 15 provide a structure for the transmission rod 43 applied in this embodiment, such as Figure 15 As shown, the transmission rod 43 includes a strip-shaped body. Figure 15 In the middle, the two ends of the main body are of different widths. One end of the main body is provided with a connection hole 425 for connecting with the rotating wheel 42, that is, Figure 15 The narrower end of the main body is provided with a connecting hole 425, and the other end of the main body is provided with a second driving hole 431. Figure 15 In the middle of the wider end of the main body, a second driving hole 431 is provided. Figure 15In the figure, the second drive hole 431 is fan-shaped, that is, the second drive hole 431 includes two arc segments with different radii and opposite intervals. The ends of the two arc segments are connected to form a symmetrical fan-shaped hole. When the circuit is opened, the fan-shaped part of the second drive hole 431 is used to provide movement space for the operating shaft 211, so as to ensure good force when driving the operating shaft 211. The other end edge of the body protrudes outward to form a tripping limit part 432. The tripping limit part 432 is used to limit the pressing stroke of the tripping button 23. In the figure, the tripping limit part 432 protrudes outward from the edge of the body to form a rectangular boss. The other end edge of the body bends and extends to form a crank arm 433. The crank arm 433 and the tripping limit part 432 are located on opposite sides of the other end of the body. In the figure, the width of the end of the crank arm 433 is slightly increased, so that it can be hooked with the indicator 51 when it is used to prevent the indicator 51 from disengaging from the crank arm 433.

[0093] Combination Figure 2 , 5 -8 and 19 provide a specific structure for the indicator 51 used in this embodiment.

[0094] like Figure 19 As shown, the indicator 51 includes a cylindrical rotating part 513. The indicator 51 is rotatably mounted inside the housing 1 via the rotating part 513. In this embodiment, a shaft hole is provided in the middle of the rotating part 513, and an assembly shaft 122 that can pass through the shaft hole is provided on the bracket 12, so that the indicator 51 is driven to rotate around the assembly shaft 122. A fan-shaped body 510 is connected to one side of the rotating part 513. Figure 19 In the design, the sector-shaped body 510 has an overall sector-shaped frame structure, thereby reducing the overall mass of the indicator 51 and facilitating the driving of the rotating shaft 3 and the transmission rod 43. One side wall of the sector-shaped body 510 cooperates with the crank arm 433 of the transmission rod 43. The sector-shaped surface of the sector-shaped body 510 serves as the indicator part 511. On the arc surface of the indicator part 511, there are sequentially provided closing, opening, and tripping indicators corresponding to the indicator holes 11. The opening indicator occupies the largest area, that is, the opening indicator has the largest central angle. Preferably, the opening indicator can also be subdivided into two different indicators. When there are two indicators, one indicator is used to indicate the position before the opening limit position, and the other indicator is used to indicate the position after the opening limit position is crossed. Of course, it can also be subdivided into three different indicators, that is, a separate opening limit position is set between the position before the opening limit position and the position after the opening limit position is crossed. The rotating part 513 extends radially outward to form the driving arm 512. Figure 19 In the middle, the end part of the drive arm 512 is bent to facilitate its engagement with the drive groove 31 provided on the rotating shaft 3; the rotating part 513 is also provided with a trigger part 514 for triggering the second micro switch 522. In this embodiment, the end face of the trigger part 514 is blunt and round for pressing the micro switch.

[0095] Furthermore, a connecting section 515 connects the rotating part 513 and the fan-shaped body 510. The connecting section 515 is provided with a swing limiting part 516. The swing limiting part 516 cooperates with the outer shell 1 to limit the swing range of the indicator 51. In this embodiment, the swing limiting part 516 is an arc-shaped protrusion. The bracket 12 is provided with a swing limiting groove 123 that cooperates with the swing limiting part 516. The swing limiting groove 123 is two arc grooves. Each arc groove corresponds to both ends of the swing limiting part 516. When the indicator 51 swings to the tripping position, one arc groove abuts against one end of the swing limiting part 516. When the indicator 51 swings to the closing position, the other arc groove abuts against the other end of the swing limiting part 516, thereby limiting the swing amplitude of the indicator 51 during the indicating process.

[0096] In addition, an indicator reset member 53 is sleeved between the rotating part 513 and the outer shell 1. The two ends of the indicator reset member 53 elastically abut against the indicator 51 and the inner shell 1, respectively. In this embodiment, the indicator reset member 53 is a torsion spring. A slot 517 is provided in the connecting section 515. One end of the indicator reset member 53 is engaged with the slot 517, and the other end of the indicator reset member 53 abuts against the bracket 12, thereby providing elastic reset force for the indicator 51.

[0097] Combination Figure 2-7 22 provides a structure for the trip button 23 applied in this embodiment, such as Figure 22 As shown, the trip button 23 includes a rod-shaped button body. One end of the button body extends out of the button hole, and a boss structure 232 protrudes from the middle of the button body. The other end of the button body is located inside the outer casing 1 and is fitted with a button reset component. In this embodiment, the button reset component is a spring. One end of the button reset component abuts against the boss structure 232 of the button body, and the other end of the button reset component abuts against a fixed position inside the outer casing 1, such as a bracket 12 disposed inside the outer casing 1. Thus, the trip button 23 is reset by deformation. A positioning plate 231 protrudes from the middle of the button body. Figure 22 The positioning plate 231 is a rectangular plate, and the positioning plate 231 is closer to the end of the button body that extends out of the button hole. The transmission rod 43 cooperates with the positioning plate 231 to restrict the release button 23 from triggering the traction rod 22.

[0098] Briefly describe the process, such as Figure 6 , 9 As shown, when the motor transmission mechanism 4 is driven to the closed position, the first curved surface 423 of the wheel 42 is... Figure 6The rotating wheel 42 rotates to the side opposite to the operating shaft 211, causing a second curved surface 424 of the rotating wheel 42 to engage with the button of the first micro switch 521, thus disengaging the first micro switch 521. The transmission rod 43 then shifts to the left as the rotating wheel 42 rotates, causing the motor's output shaft 41, connecting shaft 47, and operating shaft 211 to align on the same straight line. At this point, the connecting shaft 47 is positioned between the motor's output shaft 41 and operating shaft 211. The tripping limit part 432 on the transmission rod 43 moves out of the movement trajectory of the positioning plate 231 in the tripping button 23. Figure 9 In the middle, the distance between the tripping limit part 432 and the positioning plate 231 is the largest. Pressing the tripping button 23 can drive the traction rod 22 to trigger the tripping of the operating mechanism. The crank arm 433 separates from the indicator 51. The closing rotation of the rotating shaft 3 drives the indicator 51 to rotate, so that the closing mark of the indicator 51 is displayed in the indicator hole 11. At this time, the driving arm 512 of the indicator 51 abuts against the first contact surface 311 of the driving groove 31 in the rotating shaft 3. The trigger part 514 on the indicator 51 presses on the button of the second micro switch 522.

[0099] When the motor drive mechanism 4 is driven to the open position, the first curved surface 423 of the rotating wheel 42 faces the operating shaft 211, causing the first curved surface 423 of the rotating wheel 42 to press the button of the first micro switch 521. The length of the first curved surface 423 is sufficient to complete the three stages of opening. The three stages of opening are before the opening limit position (see...). Figure 10 ), tripping limit positions (see Figure 2 , 6 and 11) and beyond the tripping limit position (see 11) Figure 12 ).

[0100] like Figure 10 As shown, before reaching the trip limit position, the connecting shaft 47 rotates to... Figure 6 On the right side of the first drive hole 421 of the intermediate rotating wheel 42, the axis connecting the first drive hole 421, the connecting shaft 47, and the second drive hole 431 are not collinear. The transmission rod 43 is tilted to the left, so that the tripping limit part 432 of the transmission rod 43 corresponds to the moving stroke of the positioning plate 231 of the indicator 51. The crank arm 433 of the transmission rod 43 is inclined to abut against the edge of the indicator 51. The crank arm 433 abuts against the indicator 51. The rotating shaft 3 drives the indicator 51 to rotate, so that the trip mark on the indicator 51 corresponds to the indicator hole 11. At this time, the drive arm 512 abuts against the second contact surface 312 of the drive groove 31. If the trip mark is further divided into before the trip limit position and after the trip limit position, the area indicating the trip limit position corresponds to the indicator hole 11. Figure 2 , 6As shown in Figure 11, at the limit position of the tripping circuit breaker, the axes of the first drive hole 421, the connecting shaft 47, and the second drive hole 431 are collinear, and the first drive hole 421 is located between the second drive hole 431 and the connecting shaft 47, causing the tripping limit part 432 of the transmission rod 43 to move out of the travel of the positioning plate 231, that is, Figure 11 In the middle, the tripping limit part 432 has just separated from the positioning plate 231 and cannot prevent the positioning plate 231 from being pressed, and the crank arm 433 abuts against one side of the indicator 51; after passing the tripping limit position, the connecting shaft 47 rotates to Figure 12 On the left side of the first drive hole 421 of the intermediate turntable 42, the axis connecting the first drive hole 421, the connecting shaft 47 and the second drive hole 431 are not collinear, the transmission rod 43 is tilted to the right as a whole, the tripping limit part 432 moves further out of the movement stroke of the positioning plate 231, and the crank arm 433 and one side of the indicator 51 remain in contact; during the opening process, the trigger part 514 of the indicator 51 separates from the button of the second micro switch 522, and the second micro switch 522 is in the open state.

[0101] like Figure 13 As shown, when in the tripped position (i.e., the initial position when the product leaves the factory is the tripped position, or when it is turned to the tripped position during use), the operating mechanism after tripping drives the transmission rod 43 to rotate to the tripped position. That is, the operating shaft 211 drives the transmission rod 43 to rotate, and the transmission rod 43 drives the rotating wheel 42 to rotate to the tripped position. Figure 6 , 9 Based on 11-12, the first curved surface 423 of the rotating wheel 42 now faces to the left in the figure, causing a second curved surface 424 of the rotating wheel 42 to engage with the button of the first micro switch 521. The first micro switch 521 is then disengaged, and the connecting shaft 47 rotates to... Figure 6 On the right side of the rotating wheel 42, the axis connecting shaft 47, the first drive hole 421 and the second drive hole 431 are not collinear. The transmission rod 43 is tilted to the left. The release limit part 432 is away from the positioning plate 231 of the release button 23, which is the movement trajectory of moving out of the positioning plate 231. The drive arm 512 of the indicator 51 is separated from the drive groove 31 of the rotating shaft 3. That is, there is a gap between it and the first contact surface 311 and the second contact surface 312. The trigger part 514 of the indicator 51 is separated from the button of the second micro switch 522. The release mark of the indicator 51 is displayed in the indicator hole 11.

[0102] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0103] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing (1) and a button hole and an indicator hole (11) disposed in the housing (1), wherein the housing (1) is provided with an operating mechanism and a contact mechanism, the operating mechanism drives a rotating shaft (3) in the contact mechanism to rotate for opening and closing, and a trip button (23) is slidably mounted in the button hole, the trip button (23) pressing and rotating a traction rod (22) mounted on one side of the operating mechanism to trigger the tripping of the operating mechanism, characterized in that: The outer casing (1) is also equipped with a motor transmission mechanism (4) and an indicator mechanism. The motor transmission mechanism (4) includes a rotating wheel (42) and a transmission rod (43) that swings with the rotating wheel (42). The transmission rod (43) drives the operating mechanism to swing open and close. The indicator mechanism includes an indicator (51) and two microswitches. The indicator (51) is rotatably assembled and driven to swing by the rotating shaft (3) or the transmission rod (43). The two microswitches are triggered by the rotating wheel (42) and the indicator (51) respectively. The combined state of the two microswitches and the marking of the indicator (51) in the indicator hole (11) are used to indicate the closing, opening or tripping state of the circuit breaker.

2. The circuit breaker according to claim 1, characterized in that: When the circuit is closed or open, one of the two microswitches remains closed while the other is open. The indicator (51) is driven to rotate, so that the closed or open indicator of the indicator (51) is displayed in the indicator hole (11). When in the tripped position, the two microswitches remain open, causing the tripped indicator of the indicator (51) to be displayed in the indicator hole (11).

3. The circuit breaker according to claim 2, characterized in that: The tripping position is divided into three stages: before the tripping limit position, the tripping limit position, and after the tripping limit position. Before the transmission rod (43) is driven to the tripping limit position, the transmission rod (43) blocks the tripping button (23) from pressing the traction rod (22), so that the operating mechanism cannot trip.

4. The circuit breaker according to claim 3, characterized in that: The transmission rod (43) is provided with a tripping limit part (432). Before the transmission rod (43) is driven to the tripping limit position, the tripping limit part (432) blocks the movement trajectory of the tripping button (23). After the transmission rod (43) is driven to the tripping limit position and passes the tripping limit position, the tripping limit part (432) moves out of the movement trajectory of the tripping button (23).

5. The circuit breaker according to claim 3, characterized in that: The motor transmission mechanism (4) includes a motor. A first drive hole (421) is provided in the middle of the wheel (42). The output shaft (41) of the motor passes through the first drive hole (421). The output shaft (41) of the motor is provided with a drive shaft (44). The drive shaft (44) cooperates with the first drive hole (421) to drive the wheel (42) to rotate for opening or closing the circuit.

6. The circuit breaker according to claim 5, characterized in that: The edge contour of the first driving hole (421) includes two rotationally symmetrical arc-shaped involutes (4211), so that the hole wall of the first driving hole (421) forms two rotationally symmetrical driving platforms (422). The output shaft (41) of the motor is provided with a drive shaft (44) that can elastically extend and retract. The end face of the drive shaft (44) slides and elastically extends and retracts with the hole wall of the corresponding arc-shaped involute (4211) of the first driving hole (421). When the end of the drive shaft (44) engages with the driving platform (422), it drives the rotating wheel (42) to rotate.

7. The circuit breaker according to claim 6, characterized in that: Before the limit position of the circuit breaker is opened, the end of the drive shaft (44) slides along the wall of the arc-shaped involute (4211) corresponding to the first drive hole (421). After passing the limit position of the circuit breaker, the end of the drive shaft (44) engages with the drive platform (422).

8. The circuit breaker according to claim 6, characterized in that: The output shaft (41) of the motor is provided with a mounting hole. The mounting hole is arranged radially along the output shaft (41) of the motor and a drive shaft (44) is assembled in the mounting hole. A drive elastic element (45) is provided between the drive shaft (44) and the mounting hole. The drive elastic element (45) deforms axially along the mounting hole, so that the drive shaft (44) moves in the mounting hole.

9. The circuit breaker according to claim 6, characterized in that: The output shaft (41) of the motor is also equipped with a positioning shaft (46), which is arranged radially through the output shaft (41) of the motor, so that both ends of the positioning shaft (46) abut against the wheel (42) to restrict the axial movement of the output shaft (41) and the wheel (42).

10. The circuit breaker according to claim 9, characterized in that: The positioning shaft (46) is a hollow shaft. The hollow shaft has an elastic notch (461) in a direction parallel to the positioning shaft (46). The elastic notch (461) elastically contracts when the positioning shaft (46) abuts against the rotating wheel (42).

11. The circuit breaker according to claim 1, characterized in that: The micro switch triggered by the rotating wheel (42) is a first micro switch (521), and the micro switch triggered by the indicator (51) is a second micro switch (522). When the circuit is closed, the first microswitch (521) is open and the second microswitch (522) is closed. When the circuit is open, the second microswitch (522) is open and the first microswitch (521) is closed. When in the tripped position, both the first micro switch (521) and the second micro switch (522) are disconnected.

12. The circuit breaker according to claim 11, characterized in that: The edge of the rotating wheel (42) forms a first curved surface (423) and a second curved surface (424) for triggering the first micro switch (521). The first curved surface (423) is used to press the button of the first micro switch (521) to close, and the second curved surface (424) is used to provide a reset space for the button of the first micro switch (521). The radius of the second curved surface (424) is smaller than the radius of the first curved surface (423).

13. The circuit breaker according to claim 12, characterized in that: The indicator (51) is provided with a trigger part (514) for controlling the second micro switch (522).

14. The circuit breaker according to claim 1, characterized in that: The rotating wheel (42) has a first drive hole (421) in the middle, and a connecting shaft (47) is provided on one side of the rotating wheel (42) with the first drive hole (421). One end of the transmission rod (43) is connected to the connecting shaft (47), and the other end of the transmission rod (43) has a second drive hole (431) for driving the opening and closing of the operating mechanism. When the circuit is closed, the axis connecting the first drive hole (421), the second drive hole (431) and the connecting shaft (47) are on the same straight line, and the connecting shaft (47) is located between the first drive hole (421) and the second drive hole (431). When the circuit is in the limit position, the axis connecting the first drive hole (421), the second drive hole (431) and the connecting shaft (47) is on the same straight line, and the first drive hole (421) is located between the connecting shaft (47) and the second drive hole (431). When in the tripped position, the axis connecting the first drive hole (421), the second drive hole (431), and the connecting shaft (47) is not on the same straight line.

15. The circuit breaker according to claim 1, characterized in that: The transmission rod (43) includes a strip-shaped body. One end of the body is provided with a connection hole (425) for connecting with the rotating wheel (42). The other end of the body is provided with a second drive hole (431). The edge of the other end of the body protrudes outward to form a release limiting part (432). The release limiting part (432) is used to limit the pressing stroke of the release button (23). The edge of the other end of the body bends forward to form a crank arm (433). The crank arm (433) and the release limiting part (432) are located on opposite sides of the other end of the body, and the indicator (51) is pushed by the crank arm (433).

16. The circuit breaker according to claim 1, characterized in that: The indicator (51) includes a cylindrical rotating part (513). The indicator (51) is rotatably mounted in the housing (1) via the rotating part (513). A fan-shaped body (510) is connected to one side of the rotating part (513). The fan-shaped body (510) cooperates with the crank arm (433) of the transmission rod (43). The fan-shaped surface of the fan-shaped body (510) serves as the indicator part (511). The arc surface of the indicator part (511) is provided with a closing mark, a closing mark, and a trip mark corresponding to the indicator hole (11) in sequence. The rotating part (513) extends radially outward to form a drive arm (512). The drive arm (512) cooperates with the drive groove (31) provided on the rotating shaft (3). The rotating part (513) is provided with a trigger part (514) that cooperates with one of the micro switches.

17. The circuit breaker according to claim 16, characterized in that: A connecting section (515) connects the rotating part (513) and the fan-shaped body (510). The connecting section (515) is provided with a swing limiting part (516). The swing limiting part (516) cooperates with the outer shell (1) to limit the swing range of the indicator (51). An indicator reset part (53) is sleeved between the rotating part (513) and the outer shell (1). The two ends of the indicator reset part (53) elastically abut against the indicator (51) and the outer shell (1) respectively.

18. The circuit breaker according to claim 1, characterized in that: A bracket (12) is provided inside the outer casing (1), and the indicator (51) is rotatably mounted on the bracket (12). A micro switch triggered by the indicator (51) is provided on the bracket (12).

19. The circuit breaker according to claim 1, characterized in that: The release button (23) includes a button body, one end of which extends out of the button hole. A boss structure protrudes from the middle of the button body. The other end of the button body is located inside the outer shell (1) and is fitted with a button reset component. A protruding positioning plate (231) is provided in the middle of the button body. The transmission rod (43) cooperates with the positioning plate (231) to restrict the release button (23) from triggering the traction rod (22).

20. The circuit breaker according to claim 1, characterized in that: The indicator (51) is driven by the rotating shaft (3) to switch between the open and closed positions, and the indicator (51) is driven by the transmission rod (43) to rotate from the tripped position to the open position.

21. The circuit breaker according to claim 1, characterized in that: The operating mechanism includes a pair of spaced-apart side plates, with a rocker arm (21) rotatably mounted between the side plates. The rocker arm (21) is provided with an operating shaft (211), which cooperates with the second drive hole (431) of the transmission rod (43). The rocker arm (21) drives the rotating shaft (3) to rotate through the connecting rod assembly.

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