Circuit breaker

Abstract

A circuit breaker comprises a shell, an indicating mechanism, an operating mechanism, a driving mechanism and at least one phase pole unit are arranged in the shell, the operating mechanism comprises a driving shaft connected with a rotating shaft mechanism, and the driving mechanism is used for driving the driving shaft to linearly move between a switching-on position and a switching-off position. The indicating mechanism comprises an indicating piece arranged in a linear moving mode, the shell is provided with an indicating window corresponding to the indicating piece, the indicating piece is provided with a switching-on indicating mark, when the driving shaft moves to the switching-on position, the indicating piece is driven to move in a linear mode to enable the switching-on indicating mark to move to the position below the indicating window, and / or the indicating piece is provided with a switching-off indicating mark. When the driving shaft moves to the opening position, the indicating piece is driven to linearly enable the opening indicating mark to move to the position below the indicating window, rotary motion and multi-stage transmission are not needed, the indicating piece only needs simple linear motion, a spring does not need to be arranged to drive the indicating piece to reset, and the device has the advantages of being small in part number and simple in structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage electrical apparatus, concretely relates to a circuit breaker. BACKGROUND

[0002] The low voltage circuit breaker is a switch electrical apparatus which can not only connect and disconnect normal load current and overload current, but also connect and disconnect short circuit current. The circuit breaker is usually provided with an indicating mechanism. The operating mechanism of the existing circuit breaker usually drives the indicating member through a rotating shaft, and the indicating member is moved through multi-stage transmission and rotation, so that the indicating device has many parts and high cost.

[0003] In addition, the existing circuit breaker is usually provided with a micro switch as an auxiliary switch. During the opening and closing of the circuit breaker, the rotating shaft of the circuit breaker triggers or disconnects the micro switch, so that the circuit breaker displays the opening and closing information of the circuit breaker through the signal of the auxiliary switch. However, the existing auxiliary switch is usually arranged above the shell of the circuit breaker, and a large stroke is required to trigger the micro switch, so that the response speed is slow. In addition, the indicating member is moved through multi-stage transmission and rotation, so that the indicating device has many parts and high cost. SUMMARY

[0004] The utility model discloses a circuit breaker which overcomes at least one defect of the prior art.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A circuit breaker comprises a shell, an indicating mechanism, an operating mechanism, a driving mechanism and at least one phase pole unit arranged in the shell. Each phase pole unit comprises a moving contact and a stationary contact. The moving contact is mounted on a rotating shaft mechanism. The operating mechanism drives the moving contact and the stationary contact to contact and separate through the rotating shaft mechanism. The operating mechanism comprises a driving shaft connected with the rotating shaft mechanism. The driving mechanism drives the driving shaft to move linearly between a closing position and an opening position, so that the driving shaft drives the rotating shaft mechanism to rotate, and the moving contact and the stationary contact are driven to contact and separate through the rotating shaft mechanism.

[0007] The indicating mechanism comprises an indicating member arranged to move linearly. The shell is provided with an indicating window corresponding to the indicating member.

[0008] The indicating member is provided with a closing indication mark. When the driving shaft moves to the closing position, the indicating member is driven to move linearly, so that the closing indication mark moves to below the indicating window. Alternatively, the indicating member is provided with an opening indication mark. When the driving shaft moves to the opening position, the indicating member is driven to move linearly, so that the opening indication mark moves to below the indicating window.

[0009] Preferably, the operating mechanism further includes a locking mechanism and an energy storage mechanism connected to the drive shaft. When the drive mechanism drives the drive shaft to move to the closed position, the drive shaft drives the moving contact to contact the stationary contact through the rotating shaft mechanism. At the same time, the drive shaft is locked in the closed position by the locking mechanism and the energy storage mechanism is locked in the energy storage state.

[0010] When the drive mechanism triggers the locking mechanism to unlock the drive shaft and release the energy storage mechanism, the energy storage mechanism drives the drive shaft to move to the open position, and drives the moving contact to separate from the stationary contact through the rotating shaft mechanism.

[0011] Preferably, the drive shaft is arranged parallel to the length direction of the circuit breaker, and a transmission rod is provided on the drive shaft. The transmission rod is arranged parallel to the width direction of the circuit breaker. The indicator is arranged on the side of the drive shaft and cooperates with the transmission rod. When the drive shaft moves, the indicator moves linearly along the length direction of the circuit breaker through the transmission rod.

[0012] Preferably, it also includes two connecting rods connected to the rotating shaft mechanism. The drive shaft is located between the two connecting rods, and the two ends of the transmission rod are rotatably connected to the two connecting rods respectively. When the drive shaft moves, it drives the connecting rods through the transmission rods, and the connecting rods drive the rotating shaft mechanism to rotate.

[0013] Preferably, the indicating mechanism further includes an indicating seat fixed in the housing, and the indicating element is slidably disposed on the indicating seat.

[0014] Preferably, the indicator includes a support portion slidably disposed on the indicator seat, and an indicator portion and a force-bearing portion respectively connected to the support portion. The indicator portion and the force-bearing portion are disposed opposite to each other on both sides of the indicator seat along the height direction of the circuit breaker. The indicator portion is provided with a closing indicator mark and / or an opening indicator mark. The force-bearing portion includes two force-bearing plates disposed opposite to each other along the length direction of the circuit breaker. A transmission rod disposed on the drive shaft is inserted between the two force-bearing plates. The transmission rod can push the two force-bearing plates respectively to move the indicator.

[0015] Preferably, the indicator part is provided with protruding sliding shafts on both sides along the width direction of the circuit breaker, and the sliding shafts on both sides of the indicator part slide on the indicator seat respectively; the housing includes a cover plate, and the cover plate is provided with two pressure plates corresponding to the sliding shafts on both sides of the indicator part respectively. After the cover plate is assembled, it can limit the corresponding sliding shafts on the indicator seat, and limit the sliding shafts to slide between the indicator seat and the pressure plates.

[0016] Preferably, the indicator seat includes two first support plates arranged opposite to each other, and two second support plates respectively connected between the two ends of the two first support plates. An indicator guide groove is provided between the two first support plates and the two second support plates, which is parallel to the length direction of the circuit breaker. The support part is disposed in the indicator guide groove. The force plate passes through the indicator seat between the two first support plates and cooperates with the transmission rod. The two ends of the two first support plates are provided with limiting plates protruding to one side of the support part. The limiting plates at the same end of the two first support plates are connected by a third support plate. The limiting plates at the same end of the two first support plates can form an indicator limiting groove with the third support plate. The two ends of the indicator can be inserted into the indicator limiting groove.

[0017] Preferably, the two opposite sides of the support portion are provided with buckles and sliding portions corresponding to the two first support plates respectively. The buckles and the sliding shaft on one side of the indicator portion are respectively slidably engaged with the two opposite sides of the indicator seat. The sliding portions and the sliding shaft on the other side of the indicator portion are respectively slidably engaged with the two opposite sides of the indicator seat. The sliding shaft, buckles and sliding portions are simultaneously limited to the indicator seat along the moving direction perpendicular to the indicator.

[0018] Preferably, the indicator base is further provided with at least one micro switch, and when the drive shaft moves to the closed or open position, the drive indicator triggers at least one micro switch to switch the output signal.

[0019] Preferably, the drive mechanism includes an electric mechanism, which includes a magnetic control mechanism and a trip unit. The moving iron core of the magnetic control mechanism is connected to the drive shaft and can drive the drive shaft from the open position to the closed position. The trip unit is used to trigger the locking mechanism to unlock the drive shaft, so that the energy storage mechanism releases energy to drive the drive shaft from the closed position to the open position.

[0020] Preferably, the drive mechanism includes a manual mechanism, which includes a closing handle and a closing button. The closing handle is directly or indirectly connected to the drive shaft and can drive the closing position to move to the closing position. The closing button is used to trigger the locking mechanism to unlock the drive shaft, so that the energy storage mechanism releases energy to drive the drive shaft from the closing position to the opening position. The movement direction of the closing button is perpendicular to the movement direction of the drive shaft and the movement direction of the indicator.

[0021] Preferably, the housing is provided with a trigger element, the trigger element is provided with a trigger part, and the trip release device and the trip button can respectively drive the trigger element to move, so that the trigger part of the trigger element drives the locking mechanism to unlock the drive shaft.

[0022] Preferably, the housing is further provided with a traction rod, and each phase pole unit also includes a protection mechanism. When the main circuit failure of the phase pole unit triggers the protection mechanism, the protection mechanism drives the triggering element to move through the traction rod, so that the triggering part of the triggering element drives the locking mechanism to unlock the drive shaft.

[0023] Preferably, the circuit breaker includes at least three phase pole units arranged sequentially along its width, wherein the three phase pole units are a first phase pole unit, a second phase pole unit, and a third phase pole unit. The operating mechanism, magnetic control mechanism, and closing handle are located above the second phase pole unit. The indicating mechanism, trip unit, trip button, and trigger are located above the first phase pole unit. The trip unit and indicating mechanism are arranged opposite each other on both sides of the trigger along the length of the circuit breaker. The trip button and traction rod are arranged opposite each other on the upper and lower sides of the trigger along the height of the circuit breaker. The locking mechanism of the operating mechanism and the transmission rod of the operating mechanism extend above the first phase pole unit and cooperate with the trigger and indicating mechanism respectively.

[0024] Preferably, a comprehensive protection unit and a power supply module are provided above the third phase pole unit, and the comprehensive protection unit is connected to the magnetic control mechanism and the trip release device.

[0025] Preferably, the magnetic control mechanism includes a coil frame, a stationary iron core and a moving iron core disposed within the coil frame, a coil for driving the stationary iron core and the moving iron core to attract each other is provided on the outside of the coil frame, a magnetic control spring is provided between the moving iron core and the stationary iron core, the moving iron core is connected to the drive shaft, and the magnetic control spring serves as an energy storage mechanism for the operating mechanism.

[0026] Preferably, the locking mechanism includes a stop shaft, a locking member, and a locking spring. The stop shaft is movable between a locked position and an unlocked position. When the stop shaft is in the locked position, it blocks the drive shaft from moving from the closed position to the open position. When the stop shaft is in the unlocked position, it avoids the drive shaft, allowing the drive shaft to move from the closed position to the open position. The locking spring is connected to the locking member and is used to drive the locking member to push the stop shaft to the locked position and limit the stop shaft in the locked position. When the locking member is moved by an external force, it releases the limitation on the stop shaft, allowing the stop shaft to move to the unlocked position, releasing the limitation on the drive shaft and releasing the energy storage mechanism.

[0027] Preferably, the operating mechanism includes a bracket, on which the drive shaft, stop shaft, and locking member are respectively mounted. The stop shaft is rotatably configured and eccentrically positioned with respect to its rotation center. The locking member is rotatably configured and includes a locking part and an unlocking part. A locking spring drives the locking part to push against the stop shaft. When the stop shaft rotates to the locked position, it is located at the end of the drive shaft and the unlocking part extends out of the bracket. When the stop shaft rotates to the unlocked position, it is located on the side of the drive shaft. The bracket includes two bracket side plates, each with a bracket guide groove. A transmission rod is mounted on the drive shaft. Both ends of the transmission rod are slidably inserted into the two bracket guide grooves. One end of the transmission rod passes through the bracket guide groove, through the bracket side plate, and into the indicator, thereby driving the indicator to move relative to the indicator window.

[0028] The circuit breaker of this utility model has an operating mechanism with a linearly moving drive shaft. The drive rod drives the circuit breaker to open and close while simultaneously driving the indicator to move linearly. The status of the circuit breaker is indicated by the indicator. It does not require rotational motion or multi-stage transmission. The indicator only needs simple linear motion. The indicator can provide more reliable indication and occupies less space. Moreover, it does not require a spring to drive the indicator to reset. It has the characteristics of fewer parts and simple structure.

[0029] Furthermore, the drive shaft is arranged parallel to the length direction of the circuit breaker, and a transmission rod is provided on the drive shaft. The transmission rod is arranged parallel to the width direction of the circuit breaker. The drive shaft drives the connecting rod to rotate through the transmission rod. The connecting rod drives the moving contact to contact and separate from the stationary contact through the rotating shaft mechanism. The transmission rod also serves to drive the indicator and the rotating shaft mechanism to rotate, which can reduce the number of parts.

[0030] In addition, an indicator seat is provided in the housing, and an indicator element is slidably disposed on the indicator seat. The indicator element includes a support part, and an indicator part and a force-bearing part respectively connected to the support part. The support part is disposed in the indicator guide groove. The indicator part and the force-bearing part are disposed opposite to each other on the upper and lower sides of the indicator seat along the height direction of the circuit breaker. The force-bearing part passes through the indicator seat and cooperates with the drive shaft of the operating mechanism. The cooperation structure between the indicator seat and the indicator element is simple, the layout is reasonable, and there is no need to change the structure and layout of the existing operating mechanism.

[0031] Furthermore, the indicator and indicator seat are assembled as a single unit using snap-fit ​​fasteners before being fitted into the housing, resulting in high assembly efficiency. The indicator seat is located between the snap-fit ​​fastener and the support portion. The snap-fit ​​fastener serves to limit the position of the indicator and can slide against the lower side of the first support plate. The cover plate has two pressure plates corresponding to the sliding shafts on both sides of the indicator. When the cover plate is assembled onto the base, it can limit the corresponding sliding shafts on the indicator seat. The limiting sliding shafts can slide between the first support plate and the pressure plates of the indicator seat. The pressure plates also serve to limit the sliding shafts, making installation convenient.

[0032] In addition, the indicator base is also equipped with a micro switch, and the indicator can trigger the micro switch to output a signal to indicate the opening and closing status of the circuit breaker.

[0033] In addition, the electric mechanism of the circuit breaker includes a magnetic control mechanism and a trip unit. The magnetic control mechanism drives the drive shaft to move linearly, resulting in a fast closing speed. The trip unit triggers the locking mechanism to unlock the drive shaft, allowing the energy storage mechanism to release energy and drive the drive shaft from the closed position to the open position. The opening is driven by the energy storage mechanism, and the opening speed is fast and independent of the operating force, which can reduce the burning of the moving and stationary contacts by the electric arc. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the circuit breaker of this utility model;

[0035] Figure 2 This is a utility model Figure 1 A schematic diagram of the structure after the top cover is hidden;

[0036] Figure 3 This is a schematic diagram showing the cooperation between the locking mechanism and the drive shaft of this utility model;

[0037] Figure 4 This is a schematic diagram showing the cooperation of the locking mechanism, trigger, tripping device and traction rod of this utility model;

[0038] Figure 5 This is a cross-sectional view of the circuit breaker of this utility model;

[0039] Figure 6 This is a schematic diagram of the motion of the indicating mechanism of this utility model;

[0040] Figure 7 This is a schematic diagram of the structure of the indicator of this utility model;

[0041] Figure 8 This is a schematic diagram of the structure of the indicator base of this utility model;

[0042] Figure 9 This is a schematic diagram of the structure of the top cover of this utility model;

[0043] Figure 10 This is a schematic diagram of the structure of the operating mechanism of this utility model when it is in the open position;

[0044] Figure 11 This is a schematic diagram of the structure of the operating mechanism of this utility model when it is in the closed position;

[0045] Figure 12 This is a cross-sectional view of the magnetic control mechanism of this utility model;

[0046] Figure 13 This is a schematic diagram showing the cooperation between the indicator and the indicator base of this utility model;

[0047] In the picture:

[0048] 2. Operating mechanism 43. Limit plate

[0049] 3 Indicator 44 Third Support Plate

[0050] 4 indicator seats 45 mounting base

[0051] 11 bases, 46 mounting slots

[0052] 12 Middle Cover 51 Magnetic Control Mechanism

[0053] 13 cover plate 52 trip unit

[0054] 14 moving contacts, 53 trip buttons

[0055] 15N pole unit 54 trigger

[0056] 16P pole unit 55 traction rod

[0057] 17 Rotating shaft mechanism 121 Indicator window

[0058] 18-link 122 pressure plate

[0059] 21 drive shaft 221 stop shaft

[0060] 22 Locking Mechanism 222 Locking Component

[0061] 24 transmission rod 223 locking spring

[0062] 25 brackets 224 locking parts

[0063] 31 Support section 225 Unlocking section

[0064] 32 Indicator Section 251 Bracket Guide Groove

[0065] 34 Indicator Marker 511 Coil Frame

[0066] 35 sliding shaft 512 stationary iron core

[0067] 36 load-bearing plate, 513 moving iron core

[0068] 37 clip 514 coil

[0069] 41 First support plate 515 Magnetic control spring

[0070] 42 Second support plate Detailed Implementation

[0071] 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.

[0072] like Figures 1-2 As shown, the circuit breaker in this embodiment includes a housing composed of a base 11, a middle cover 12, and a cover plate 13. The housing contains an operating mechanism 2, a driving mechanism, a measurement unit, a comprehensive protection unit, and a power module, as well as multiple phase pole units arranged side-by-side. These phase pole units are arranged side-by-side along the width direction of the circuit breaker and are isolated from each other by phase spacers.

[0073] Each phase unit includes a moving contact 14, a stationary contact, a terminal block, an arc-extinguishing mechanism, a rotating shaft mechanism 17, and a protection mechanism. The moving contact 14 and the stationary contact of each phase unit are connected to their respective circuits through two terminal blocks.

[0074] The moving contact 14 is mounted on its respective rotating shaft mechanism 17. The rotating shaft mechanisms 17 of multiple phase pole units are linked together. The driving mechanism includes a manual mechanism and / or an electric mechanism. The manual mechanism and the electric mechanism can drive the operating mechanism 2 to rotate all the rotating shaft mechanisms 17 of the phase pole units, so that the rotating shaft mechanism 17 drives its respective moving contact 14 to contact and separate from the stationary contact, thereby connecting and disconnecting the line connected to each phase pole unit. The protection mechanism is used to trigger the operating mechanism 2 to trip when there is a line fault, so that the operating mechanism 2 drives the moving contact 14 to separate from the stationary contact through the rotating shaft mechanism 17. For example, the protection mechanism can trigger the operating mechanism 2 to trip when there is an overload and / or short circuit.

[0075] The operating mechanism 2 includes a drive shaft 21 connected to a rotating shaft mechanism 17. The drive mechanism is used to drive the drive shaft 21 to move linearly between the closed position and the open position, so that the drive shaft 21 drives the rotating shaft mechanism 17 to rotate. The rotating shaft mechanism 17 drives the moving contact 14 and the stationary contact to contact and separate. When the drive shaft 21 moves to the closed position, the rotating shaft mechanism 17 drives the moving contact 14 to contact the stationary contact. When the drive shaft 21 moves to the open position, the rotating shaft mechanism 17 drives the moving contact 14 to separate from the stationary contact.

[0076] The circuit breaker of this embodiment has three phase pole units and an N pole unit 15 arranged side by side on the sides of the three phase pole units. The three phase pole units are P pole units 16. The three phase pole units and one N pole unit 15 are arranged side by side along the width direction of the circuit breaker. The N pole unit 15 can be a direct-connected N pole unit 15 without a break or it can have a break, that is, an N pole unit 15 including a moving contact 14 and a stationary contact. The N pole unit 15 can be equipped with or without a protection mechanism.

[0077] This embodiment is a three-phase magnetically controlled measuring switch. The driving mechanism includes an electric mechanism and a manual mechanism. The electric mechanism includes a magnetic control mechanism 51 and a trip unit 52. The integrated protection unit is connected to the magnetic control mechanism 51 and the trip unit 52. The integrated protection unit controls the magnetic control mechanism 51 to perform a closing operation. The magnetic control mechanism 51 drives the operating mechanism 2 to make the moving contact 14 contact the stationary contact. The integrated protection unit controls the trip unit 52 to trigger the operating mechanism 2 to trip and achieve opening. The trip unit 52 is an electromagnetic trip unit. As another embodiment, the measuring unit, integrated protection unit, and power supply module may not be provided. The controller or host computer can be directly connected to the magnetic control mechanism 51 and / or the trip unit 52 without going through the integrated protection unit. It should be noted that the number of phase units can also be adjusted, for example, one, two, four, or more phase units, all of which are within the protection scope of this utility model.

[0078] It is understood that the rotating shaft mechanism 17 of the multiple phase pole units may not be linked, and each phase pole unit is provided with a set of operating mechanism 2, manual mechanism and electric mechanism. Each phase pole can realize independent manual opening and closing control and independent remote closing control. Compared with the operating mechanism 2 of the motor, the electric mechanism is smaller in size and simpler in structure.

[0079] like Figures 2-5 As shown, an improvement in this embodiment is that the housing is further provided with an indicator mechanism linked to the operating mechanism 2. The indicator mechanism includes an indicator 3 that moves linearly, and an indicator window 121 corresponding to the indicator 3 on the housing. The indicator mechanism indicates the open / closed state of the circuit breaker. The indicator 3 has a closed indicator mark. When the drive shaft 21 moves to the closed position, it drives the indicator 3 to move linearly, causing the closed indicator mark to move below the indicator window 121. And / or, the indicator 3 has an open indicator mark. When the drive shaft 21 moves to the open position, it drives the indicator 3 to move linearly, causing the open indicator mark to move below the indicator window 121. In this embodiment, the indicator 3 has both a closed indicator mark and an open indicator mark. In other embodiments, only a closed indicator mark or an open indicator mark may be provided. When the indicator window 121 does not display the indicator mark, it is used to indicate another state.

[0080] The circuit breaker of this utility model has an operating mechanism with a linearly moving drive shaft 21. The drive rod drives the circuit breaker to open and close while simultaneously driving the indicator 3 to move linearly. The status of the circuit breaker is indicated by the indicator 3. No rotational motion or multi-stage transmission is required. The indicator 3 only needs simple linear motion. The indicator 3 can provide more reliable indication and occupies less space. Moreover, there is no need to set a spring to drive the indicator 3 to reset. It has the characteristics of fewer parts and simple structure.

[0081] like Figures 5-6As shown, the drive shaft 21 is arranged parallel to the length direction of the circuit breaker, and a transmission rod 24 is provided on the drive shaft 21. The transmission rod 24 is arranged parallel to the width direction of the circuit breaker. The indicator 3 is arranged on the side of the drive shaft 21 and cooperates with the transmission rod 24. When the drive shaft 21 moves, the indicator 3 is driven to move through the transmission rod 24.

[0082] Furthermore, the moving contact 14 is mounted on the rotating shaft mechanism 17 via a contact spring (not shown in the figure), and the rotating shaft mechanism 17 of multiple phase pole units is linked together. The housing also contains two connecting rods 18 connected to the rotating shaft mechanism 17. The drive shaft 21 is located between the two connecting rods 18, and both ends of the transmission rod 24 are rotatably connected to the two connecting rods 18 respectively. The drive shaft 21 drives the connecting rods 18 through the transmission rods 24, and the connecting rods 18 drive the rotating shaft mechanism 17 to rotate. The driving rotating shaft mechanism 17 causes the moving contact 14 to contact and separate from the stationary contact.

[0083] In this embodiment, the transmission rod 24 simultaneously drives the indicator 3 and, through the connecting rod 18, drives the rotating shaft mechanism 17 to rotate, thus reducing the number of parts. Alternatively, an indicator rod can be installed on the drive shaft 21, and the indicator rod and the transmission rod 24 can respectively drive the indicator 3 and the connecting rod 18; both fall within the protection scope of this utility model.

[0084] like Figures 6-8 As shown, the indicating mechanism further includes an indicating seat 4 fixed in the housing. The indicating element 3 is slidably disposed on the indicating seat 4. The indicating seat 4 is used to restrict the indicating element 3 to move only along the length direction of the circuit breaker. An indicating guide groove is provided in the indicating seat 4, and the indicating element 3 is slidably disposed in the indicating guide groove. In this embodiment, the indicating seat 4 includes two first support plates 41 arranged opposite to each other, and two second support plates 42 respectively connected between the two ends of the two first support plates 41. An indicating guide groove parallel to the length direction of the circuit breaker is provided between the two first support plates 41 and between the two second support plates 42.

[0085] The indicator 3 includes a support part 31, and an indicator part 32 and a force-bearing part respectively connected to the support part 31. The support part 31 is disposed in the indicator guide groove, and the indicator part 32 and the force-bearing part are disposed opposite to each other on the upper and lower sides of the indicator seat 4 along the height direction of the circuit breaker.

[0086] The indicator part 32 is located above the indicator base 4. The indicator part 32 is provided with two indicator marks 34 corresponding to the closing and opening of the circuit breaker, namely the closing indicator mark and the opening indicator mark. The indicator part 32 is provided with protruding sliding shafts 35 on both sides along the width direction of the circuit breaker. The sliding shafts 35 on both sides of the indicator part 32 slide and cooperate on the two first support plates 41 respectively.

[0087] The force-bearing part is located below the indicator seat 4 and includes two force-bearing plates 36 arranged opposite each other along the length of the circuit breaker. A transmission rod 24 on the drive shaft 21 is inserted between the two force-bearing plates 36. The transmission rod 24 can push the two force-bearing plates 36 to move the indicator 3. When the drive shaft 21 moves to the closed position, the transmission rod 24 pushes one of the force-bearing plates 36, causing the corresponding closed indicator to move to the indicator window 121. When the drive shaft 21 moves to the open position, the transmission rod 24 pushes one of the force-bearing plates 36, causing the corresponding open indicator to move to the indicator window 121. Preferably, the force-bearing plate 36 passes through the indicator seat 4 between the two first support plates 41 and cooperates with the transmission rod 24. In this embodiment, the cooperation structure of the indicator seat 4 and the indicator 3 is simple, the layout is reasonable, and there is no need to change the structure and layout of the existing operating mechanism.

[0088] Preferably, each side of the indicator portion 32 is provided with at least two sliding shafts 35. In this embodiment, three sliding shafts 35 are provided on each side. The sliding shafts 35 on each side are spaced apart along the length of the circuit breaker. The number of sliding shafts 35 can also be adjusted, for example, two or more. As another embodiment, the side of the indicator portion 32 can also be provided with protruding elongated ribs or grooves for sliding engagement with the side wall of the indicator seat 4.

[0089] like Figure 9 As shown, the cover plate 13 is provided with two pressure plates 122 corresponding to the sliding shafts 35 on both sides of the indicator part 32. When the cover plate 13 is assembled onto the middle cover 12, it can limit the corresponding sliding shafts 35 on the first support plate 41 of the indicator seat 4. The sliding shafts 35 can slide between the first support plate 41 and the pressure plates 122 of the indicator seat 4. The pressure plates 122 can limit the sliding shafts 35, and the installation is convenient.

[0090] Furthermore, such as Figures 7-8As shown in Figure 13, the supporting portion 31 of the indicator 3 has buckles 37 and sliding portions 38 on opposite sides, corresponding to the two first supporting plates 41 respectively. The buckles 37 and the sliding shaft 35 on one side of the indicator portion 32 are slidably engaged with the opposite sides of the indicator seat 4, and the sliding portions 38 and the sliding shaft 35 on the other side of the indicator portion 32 are slidably engaged with the opposite sides of the indicator seat 4. The sliding shaft 35, buckles 37 and sliding portions 38 are simultaneously limited to the indicator seat 4 along the direction perpendicular to the movement of the indicator 3, thus limiting the indicator 3 to the indicator seat 4. The first supporting plate 41 The inner wall is provided with a mounting groove 46 corresponding to the buckle 37. The mounting groove 46 can reduce the thickness of the first support plate 41, allowing the buckle 37 to pass through the inner side of the first support plate 41 along the mounting groove 46. After passing through the first support plate 41, the buckle 37 engages with the lower side of the first support plate 41, so that the first support plate 41 is located between the buckle 37 and the sliding shaft 35. The buckle 37 can act as a limiting indicator 3 and can slide with the lower side of the first support plate 41, so that the indicator 3 and the indicator seat 4 are installed as a whole before being assembled into the housing, resulting in high assembly efficiency.

[0091] In this embodiment, a buckle 37 is provided on one side of the support part 31 and a sliding part 38 is provided on the other side. Alternatively, buckles 37 can be provided on both sides of the support part 31, both of which fall within the protection scope of this utility model.

[0092] Furthermore, the two ends of the two first support plates 41 are provided with limiting plates 43 protruding towards the sliding shaft 35. The limiting plates 43 at the same end of the two first support plates 41 are connected by a third support plate 44. The limiting plates 43 at the same end of the two first support plates 41 can form an indicator limiting groove with the third support plate 44. The two ends of the indicator part 32 can be inserted into the indicator limiting groove, which can serve as a limiting indicator part 32.

[0093] Furthermore, each end of the indicator seat 4 is provided with a mounting platform 45. The mounting platform 45 is provided with a mounting hole (not shown in the figure) for the connector to pass through. After the connector passes through the mounting hole, it is connected to the housing to fix the indicator seat 4 on the housing. In this embodiment, the connector is a screw, but other methods can also be used, such as fixing the indicator seat 4 by a snap-fit ​​method or pressing it into the housing by a cover plate 13. All of these are within the protection scope of this utility model.

[0094] Preferably, the indicator base 4 is further provided with at least one micro switch. When the drive shaft 21 moves to the closed or open position, the drive indicator 3 triggers at least one micro switch to switch the output signal for outputting the circuit breaker's open / closed status. For example, when the drive shaft 21 moves to the closed position, the drive indicator 3 presses the trigger button of the micro switch, causing the micro switch to output a signal indicating that the circuit breaker is closed. When the drive shaft 21 moves to the open position, it avoids the micro switch, and the micro switch does not output a signal to indicate that the circuit breaker is closed. Alternatively, the drive shaft 21 can trigger the micro switch when it moves to the open position and avoid the micro switch when it moves to the closed position. In another embodiment, the indicator base 4 is also provided with two micro switches. When the drive shaft 21 moves to the closed position, the drive indicator 3 presses the trigger button of one of the micro switches, so that the micro switch outputs a signal to indicate that the circuit breaker is closed, avoiding the other micro switch. When the drive shaft 21 moves to the open position, the drive indicator 3 presses the trigger button of the other micro switch to indicate that the circuit breaker is open, avoiding the aforementioned micro switch.

[0095] like Figures 2-4 As shown, the operating mechanism also includes a locking mechanism 22 and an energy storage mechanism connected to the drive shaft 21. When the drive mechanism drives the drive shaft 21 to the closed position, the drive shaft 21 drives the moving contact 14 to contact the stationary contact through the rotating shaft mechanism 17. At the same time, the drive shaft 21 is locked in the closed position by the locking mechanism 22 and the energy storage mechanism is locked in the energy storage state. When the drive mechanism triggers the locking mechanism 22 to unlock the drive shaft 21 and release the energy storage mechanism, the energy storage mechanism drives the drive shaft 21 to the open position and drives the moving contact 14 to separate from the stationary contact through the rotating shaft mechanism 17. Preferably, the locking mechanism 22 in this embodiment includes a stop shaft 221, a locking member 222, and a locking spring 223. The stop shaft 221 can move between a locked position and an unlocked position. When the stop shaft 221 is in the locked position, it blocks the drive shaft 21 from moving from the closed position to the open position. When the stop shaft 221 is in the unlocked position, it avoids the drive shaft 21, allowing the drive shaft 21 to move from the closed position to the open position. The locking spring 223 is connected to the locking member 222 and is used to drive the locking member 222 to push the stop shaft 221 to the locked position and limit the stop shaft 221 in the locked position. When the locking member 222 is moved by an external force, it releases the limitation on the stop shaft 221, allowing the stop shaft 221 to move to the unlocked position, releasing the limitation on the drive shaft 21 and releasing the energy storage mechanism.

[0096] like Figures 2-4As shown, the electric mechanism of this embodiment includes a magnetic control mechanism 51 and a trip unit 52. The manual mechanism includes a closing handle (not shown) and a trip button 53. The moving iron core 513 of the magnetic control mechanism 51 is connected to the drive shaft 21. The closing handle can be connected to the drive shaft 21 indirectly or directly. The magnetic control mechanism 51 and the closing handle can respectively drive the drive shaft 21 from the open position to the closed position, so that the circuit breaker is closed. The trip unit 52 and the trip button 53 are respectively used to trigger the locking mechanism 22 to unlock the drive shaft 21, so that the energy storage mechanism releases energy to drive the drive shaft 21 from the closed position to the open position. The moving direction of the trip button 53 is perpendicular to the moving direction of the drive shaft 21 and the moving direction of the indicator 3.

[0097] The housing contains a movable trigger 54 and a traction rod 55 that cooperates with the trigger 54. The trigger 54 has a triggering part, and the traction rod 55 cooperates with the protection mechanism of the phase unit. The traction rod 55, the trip unit 52, and the trip button 53 can respectively drive the trigger 54 to move, causing the triggering part of the trigger 54 to drive the locking mechanism 22 to unlock the drive shaft 21, that is, triggering the operating mechanism to trip, so that the drive shaft 21 moves from the closed position to the open position under the drive of the energy storage mechanism, realizing the circuit breaker tripping. The trigger 54 can be rotatably set or linearly moved.

[0098] like Figure 2 As shown, the circuit breaker in this embodiment includes a first phase pole unit, a second phase pole unit, and a third phase pole unit arranged sequentially along the width direction of the circuit breaker. The operating mechanism 2, the magnetic control mechanism 51, and the closing handle are located above the second phase pole unit. The indicating mechanism, the trip release 52, the trip button 53, and the trigger 54 are located above the first phase pole unit. The third phase pole unit is equipped with a comprehensive protection unit and a power module. The trip release 52 and the indicating mechanism are arranged opposite to each other on both sides of the trigger 54 along the length direction of the circuit breaker. The trip button 53 and the traction rod 55 are arranged opposite to each other on the upper and lower sides of the trigger 54 along the height direction of the circuit breaker. The locking mechanism 22 of the operating mechanism 2 and the transmission rod 24 of the operating mechanism 2 extend above the first phase pole unit and cooperate with the trigger 54 and the indicating mechanism respectively. It has the characteristics of reasonable layout and small size.

[0099] In this embodiment, the trip unit 52 is typically an electromagnetic trip unit, including a trip coil and a trip unit. The protection mechanism of the circuit breaker in this embodiment is a thermal-magnetic protection mechanism, providing both overload and short-circuit protection. In the event of an overload or short circuit, the traction rod 55 rotates, pushing the trigger element 54, which in turn triggers the locking mechanism 22 to unlock and trip. Of course, the protection mechanism can also provide only overload or short-circuit protection.

[0100] like Figure 4As shown, the mechanism above the first phase unit can also be interchanged with the mechanism above the third phase unit. That is, the indicator mechanism, trip release device 52, trip button 53, and trigger 54 are placed above the third phase unit, and the integrated protection unit and power module are placed above the first phase unit.

[0101] In other embodiments, the manual mechanism may not have a trip button 53, and instead uses a closing handle for tripping. When the closing handle moves in the tripping direction, it causes the locking mechanism 22 to release the lock on the drive shaft 21, thus disengaging the operating mechanism 2. For example, another embodiment may have a linear movement of the closing handle. When moving in the closing direction, it causes the drive shaft 21 to move from the tripping position to the closing position. When tripping, rotating the closing handle directly or indirectly drives the locking mechanism 22 to disengage via other connecting rods 18; alternatively, the closing handle can move linearly in other directions, directly or indirectly driving the locking mechanism 22 via other connecting rods 18.

[0102] like Figures 2-4 As shown, in a specific embodiment of the operating mechanism 2, the operating mechanism 2 includes a bracket 25, and the locking mechanism 22 includes a stop shaft 221, a locking element 222, and a locking spring 223. The drive shaft 21, the stop shaft 221, and the locking element 222 are respectively mounted on the bracket 25. The bracket 25 includes two bracket side plates arranged opposite to each other along the width direction of the circuit breaker. The two bracket side plates are respectively provided with bracket guide grooves 251. The two ends of the transmission rod 24 are respectively inserted into the two bracket guide grooves 251 for sliding engagement, thus transmitting power. One end of rod 24 passes through the bracket guide groove 251, through the bracket side plate, and is inserted into the indicator 3 to drive the indicator 3 to move relative to the indicator window 121; the drive shaft 21 is linearly movable, and the stop shaft 221 can move between the locked position and the unlocked position. When the stop shaft 221 is in the locked position, it can prevent the drive shaft 21 from moving from the closed position to the open position and lock the energy storage mechanism in the energy storage state; when the stop shaft 221 is in the unlocked position, it avoids the drive shaft 21, allowing the drive shaft 21 to move from the closed position to the open position.

[0103] The locking spring 223 is connected to the locking member 222 and is used to drive the locking member 222 to push the stop shaft 221 to the locked position and limit the stop shaft 221 in the locked position, that is, simultaneously prevent the stop shaft 221 from moving from the locked position to the unlocked position. When the locking member 222 is moved by external force, it releases the limitation on the stop shaft 221, allowing the stop shaft 221 to move to the unlocked position, releasing the limitation on the drive shaft 21, and the drive shaft 21 releases the energy storage mechanism. When the energy storage mechanism releases energy, it drives the drive shaft 21 to move to the open position. The stop shaft 221 can be equipped with a return spring, which automatically moves from the locked position to the unlocked position under the drive of the return spring. Alternatively, when the energy storage mechanism releases energy and drives the drive shaft 21 to move to the open position, the drive shaft 21 drives the stop shaft 221 to move to the open position.

[0104] In this embodiment, the stop shaft 221 of the locking mechanism 22 is rotatably configured and is eccentrically positioned with respect to its rotation center. The locking member 222 includes a locking part 224 and an unlocking part 225. The locking spring 223 drives the locking part 224 to push against the stop shaft 221. When the stop shaft 221 rotates to the locked position, the stop shaft 221 is located at the end of the drive shaft 21 and the unlocking part 225 extends out of the bracket 25. Figure 11 When the unlocking part 225 is subjected to force, it can cause the locking part 222 to release the restriction on the stop shaft 221; when the stop shaft 221 rotates to the unlocked position, it is located on the side of the drive shaft 21. Figure 10 Obviously, the locking mechanism 22 can also be implemented in other ways. For example, the stop shaft 221 can be linearly sliding, or it can be integrally formed with the locking member 222, and the locking member 222 can also be linearly sliding, etc.

[0105] like Figure 12 As shown, the magnetic control mechanism 51 of this embodiment includes a coil frame 511, and a stationary iron core 512 and a moving iron core 513 disposed within the coil frame 511. A coil 514 is provided on the outside of the coil frame 511 for driving the stationary iron core 512 and the moving iron core 513 to attract each other. A magnetic control spring 515 is provided between the moving iron core 513 and the stationary iron core 512. The moving iron core 513 is connected to the drive shaft 21, and the magnetic control spring 515 serves as the energy storage mechanism of the operating mechanism 2. It should be noted that other independent springs can also be used as the energy storage mechanism, and the springs are connected to the drive shaft 21.

[0106] During the electric closing process, the coil 514 drives the stationary iron core 512 to engage with the moving iron core 513. The moving iron core 513 moves closer to the stationary iron core 512. At the same time, the drive shaft 21 drives the rotating shaft mechanism 17, which in turn drives the moving contact 14 to contact the stationary contact. When the closing is complete, the drive shaft 21 is limited by the stop shaft 221, and the moving iron core 513 is also limited to the position where it engages with the stationary iron core 512. The magnetic control spring 515 is in a locked energy storage state. When the opening begins, the stop shaft 221 releases its obstruction of the drive shaft 21 and releases the magnetic control spring 515. The magnetic control spring 515 drives the moving iron core 513 to separate from the stationary iron core 512. During the process of the magnetically controlled spring 515 driving the moving iron core 513 to separate from the stationary iron core 512, the drive shaft 21 connected to the moving iron core 513 drives the rotating shaft mechanism 17 to move, causing the moving contact 14 to separate from the stationary contact. The magnetically controlled spring 515 can not only play the role of resetting the electric mechanism, but also serve as the energy storage mechanism of the operating mechanism 2. When the circuit is opened, it drives the moving contact 14 to separate from the stationary contact quickly, reducing the generation of electric arc between the moving contact 14 and the stationary contact.

[0107] like Figure 10 As shown, the drive shaft 21 is in the open position at this time. Figure 6 In the solid line section, the electric mechanism is energized and engaged, causing the moving iron core 513 to drive the drive shaft 21 to move to... Figure 11 The closing position shown Figure 6 In the dotted section, the drive shaft 21 drives the rotating shaft mechanism 17 to close the circuit breaker. The locking spring 223 drives the locking member 222 to rotate and push the stop shaft 221 to the locked position. The locking part 224 of the locking member 222 pushes against the stop shaft 221 and limits the stop shaft 221. The stop shaft 221 blocks the end of the drive shaft 21, preventing the drive shaft 21 from moving to the open position. At the same time, the unlocking part 225 extends to the outside of the bracket 25 and cooperates with the trigger member 54.

[0108] When the circuit breaker is tripped, the unlocking part 225 of the locking member 222, under the action of the trigger member 54, causes the locking part 224 to move away against the elastic force of the locking spring 223. The energy storage mechanism then releases energy, pushing the drive shaft 21 to move towards the tripped position, driving the rotating shaft mechanism 17 to trip the circuit breaker. Simultaneously, the drive shaft 21 pushes the stop shaft 221 from the locked position to the unlocked position, and the operating mechanism 2... Figure 11 Switching to the closing state Figure 10 When the circuit is open, the stop shaft 221 abuts against the side of the drive shaft 21.

[0109] 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.

[0110] 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, wherein an indicating mechanism, an operating mechanism (2), a driving mechanism, and at least one phase pole unit are provided within the housing, each phase pole unit comprising a moving contact (14) and a stationary contact, the moving contact (14) being mounted on a rotating shaft mechanism (17), the operating mechanism (2) driving the moving contact (14) and the stationary contact to contact and separate via the rotating shaft mechanism (17), the operating mechanism (2) comprising a driving shaft (21) connected to the rotating shaft mechanism (17), the driving mechanism being used to drive the driving shaft (21) to move linearly between a closed position and an open position, causing the driving shaft (21) to drive the rotating shaft mechanism (17) to rotate, thereby driving the moving contact (14) and the stationary contact to contact and separate via the rotating shaft mechanism (17). Its features are: The indicating mechanism includes an indicator (3) that moves linearly, and an indicator window (121) corresponding to the indicator (3) is provided on the housing. The indicator (3) is provided with a closing indicator mark. When the drive shaft (21) moves to the closing position, it drives the indicator (3) to move linearly so that the closing indicator mark moves below the indicator window (121). And / or, the indicator (3) is provided with a closing indicator mark. When the drive shaft (21) moves to the closing position, it drives the indicator (3) to move linearly so that the closing indicator mark moves below the indicator window (121).

2. The circuit breaker according to claim 1, characterized in that: The operating mechanism also includes a locking mechanism (22) and an energy storage mechanism connected to the drive shaft (21). When the drive mechanism drives the drive shaft (21) to the closed position, the drive shaft (21) drives the moving contact (14) to contact the stationary contact through the rotating shaft mechanism (17). At the same time, the drive shaft (21) is locked in the closed position by the locking mechanism (22) and the energy storage mechanism is locked in the energy storage state. When the drive mechanism triggers the locking mechanism (22) to unlock the drive shaft (21) and release the energy storage mechanism, the energy storage mechanism drives the drive shaft (21) to move to the open position, and drives the moving contact (14) to separate from the stationary contact through the rotating shaft mechanism (17).

3. The circuit breaker according to claim 1, characterized in that: The drive shaft (21) is arranged parallel to the length direction of the circuit breaker. A transmission rod (24) is provided on the drive shaft (21). The transmission rod (24) is arranged parallel to the width direction of the circuit breaker. The indicator (3) is arranged on the side of the drive shaft (21) and cooperates with the transmission rod (24). When the drive shaft (21) moves, the indicator (3) is driven to move linearly along the length direction of the circuit breaker through the transmission rod (24).

4. The circuit breaker according to claim 3, characterized in that: It also includes two connecting rods (18) connected to the rotating shaft mechanism (17). The drive shaft (21) is located between the two connecting rods (18). The two ends of the transmission rod (24) are rotatably connected to the two connecting rods (18) respectively. When the drive shaft (21) moves, it drives the connecting rods (18) through the transmission rods (24). The connecting rods (18) drive the rotating shaft mechanism (17) to rotate.

5. The circuit breaker according to claim 1, characterized in that: The indicating mechanism also includes an indicating seat (4) fixed in the housing, and the indicating element (3) is slidably disposed on the indicating seat (4).

6. The circuit breaker according to claim 5, characterized in that: The indicator (3) includes a support (31) slidably disposed on the indicator seat (4), and an indicator (32) and a force-bearing part respectively connected to the support (31). The indicator (32) and the force-bearing part are disposed opposite to each other on both sides of the indicator seat (4) along the height direction of the circuit breaker. The indicator (32) is provided with a closing indicator mark and / or a opening indicator mark. The force-bearing part includes two force-bearing plates (36) disposed opposite to each other along the length direction of the circuit breaker. A transmission rod (24) disposed on the drive shaft (21) is inserted between the two force-bearing plates (36). The transmission rod (24) can push the two force-bearing plates (36) respectively to drive the indicator (3) to move.

7. The circuit breaker according to claim 6, characterized in that: The indicator part (32) has protruding sliding shafts (35) on both sides along the width direction of the circuit breaker. The sliding shafts (35) on both sides of the indicator part (32) slide on the indicator seat (4). The housing includes a cover plate (13). The cover plate (13) has two pressure plates (122) corresponding to the sliding shafts (35) on both sides of the indicator part (32). After the cover plate (13) is assembled, it can limit the corresponding sliding shafts (35) on the indicator seat (4) and limit the sliding shafts (35) to slide between the indicator seat (4) and the pressure plates (122).

8. The circuit breaker according to claim 6, characterized in that: The indicator seat (4) includes two first support plates (41) arranged opposite to each other, and two second support plates (42) respectively connected between the two ends of the two first support plates (41). An indicator guide groove is provided between the two first support plates (41) and the two second support plates (42) and is parallel to the length direction of the circuit breaker. The support part (31) is set in the indicator guide groove. The force plate (36) passes through the indicator seat (4) between the two first support plates (41) and cooperates with the transmission rod (24). The two ends of the two first support plates (41) are provided with limiting plates (43) protruding to one side of the support part (31). The limiting plates (43) at the same end of the two first support plates (41) are connected by a third support plate (44). The limiting plates (43) at the same end of the two first support plates (41) can form an indicator limiting groove with the third support plate (44). The two ends of the indicator (3) can be inserted into the indicator limiting groove.

9. The circuit breaker according to claim 8, characterized in that: The support part (31) has buckles (37) and sliding parts (38) on opposite sides, which correspond to the two first support plates (41) respectively. The buckles (37) and the sliding shaft (35) on one side of the indicator part (32) are slidably engaged with the opposite sides of the indicator seat (4). The sliding parts (38) and the sliding shaft (35) on the other side of the indicator part (32) are slidably engaged with the opposite sides of the indicator seat (4). The sliding shaft (35), buckles (37) and sliding parts (38) are simultaneously limited to the indicator seat (4) along the moving direction perpendicular to the indicator (3).

10. The circuit breaker according to claim 5, characterized in that: The indicator seat (4) is also provided with at least one micro switch. When the drive shaft (21) moves to the closed or open position, the drive indicator (3) triggers at least one micro switch to switch the output signal.

11. The circuit breaker according to claim 2, characterized in that: The drive mechanism includes an electric mechanism, which includes a magnetic control mechanism (51) and a trip unit (52). The moving iron core (513) of the magnetic control mechanism (51) is connected to the drive shaft (21) and can drive the drive shaft (21) from the open position to the closed position. The trip unit (52) is used to trigger the locking mechanism (22) to unlock the drive shaft (21), so that the energy storage mechanism releases energy to drive the drive shaft (21) from the closed position to the open position.

12. The circuit breaker according to claim 11, characterized in that: The drive mechanism includes a manual mechanism, which includes a closing handle and a closing button (53). The closing handle is directly or indirectly connected to the drive shaft (21) and can drive the closing position to move to the closing position. The closing button (53) is used to trigger the locking mechanism (22) to unlock the drive shaft (21), so that the energy storage mechanism releases energy to drive the drive shaft (21) from the closing position to the opening position. The moving direction of the closing button (53) is perpendicular to the moving direction of the drive shaft (21) and the moving direction of the indicator (3).

13. The circuit breaker according to claim 12, characterized in that: The housing is provided with a trigger (54), and the trigger (54) is provided with a trigger part. The trip release device (52) and the trip button (53) can respectively drive the trigger (54) to move, so that the trigger part of the trigger (54) drives the locking mechanism (22) to unlock the drive shaft (21).

14. The circuit breaker according to claim 13, characterized in that: The housing is also provided with a traction rod (55), and each phase pole unit also includes a protection mechanism. When the main circuit failure of the phase pole unit triggers the protection mechanism, the protection mechanism drives the trigger (54) to move through the traction rod (55), so that the trigger part of the trigger (54) drives the locking mechanism (22) to unlock the drive shaft (21).

15. The circuit breaker according to claim 14, characterized in that: The circuit breaker includes at least three phase pole units arranged sequentially along its width, namely a first phase pole unit, a second phase pole unit, and a third phase pole unit. The operating mechanism (2), the magnetic control mechanism (51), and the closing handle are located above the second phase pole unit. The indicating mechanism, the trip release device (52), the trip button (53), and the trigger (54) are located above the first phase pole unit. The trip release device (52) and the indicating mechanism are arranged opposite to each other on both sides of the trigger (54) along the length of the circuit breaker. The trip button (53) and the traction rod (55) are arranged opposite to each other on the upper and lower sides of the trigger (54) along the height of the circuit breaker. The locking mechanism (22) of the operating mechanism (2) and the transmission rod (24) of the operating mechanism (2) extend above the first phase pole unit and cooperate with the trigger (54) and the indicating mechanism, respectively.

16. The circuit breaker according to claim 15, characterized in that: The third phase pole unit is provided with a comprehensive protection unit and a power supply module above it. The comprehensive protection unit is connected to the magnetic control mechanism (51) and the trip release device (52).

17. The circuit breaker according to claim 11, characterized in that: The magnetic control mechanism (51) includes a coil frame (511), a stationary iron core (512) and a moving iron core (513) disposed within the coil frame (511). A coil (514) is provided on the outside of the coil frame (511) for driving the stationary iron core (512) and the moving iron core (513) to attract each other. A magnetic control spring (515) is provided between the moving iron core (513) and the stationary iron core (512). The moving iron core (513) is connected to the drive shaft (21). The magnetic control spring (515) serves as the energy storage mechanism of the operating mechanism (2).

18. The circuit breaker according to claim 2, characterized in that: The locking mechanism (22) includes a stop shaft (221), a locking member (222), and a locking spring (223). The stop shaft (221) can move between a locked position and an unlocked position. When the stop shaft (221) is in the locked position, it blocks the drive shaft (21) from moving from the closed position to the open position. When the stop shaft (221) is in the unlocked position, it avoids the drive shaft (21), allowing the drive shaft (21) to move from the closed position to the open position. The locking spring (223) is connected to the locking member (222) and is used to drive the locking member (222) to push the stop shaft (221) to the locked position and limit the stop shaft (221) in the locked position. When the locking member (222) is moved by external force, it releases the limit on the stop shaft (221), allowing the stop shaft (221) to move to the unlocked position, releasing the limit on the drive shaft (21) and releasing the energy storage mechanism.

19. The circuit breaker according to claim 18, characterized in that: The operating mechanism (2) includes a bracket (25). The drive shaft (21), the stop shaft (221), and the locking member (222) are respectively mounted on the bracket (25). The stop shaft (221) is rotatably configured and is eccentrically configured with respect to its rotation center. The locking member (222) is rotatably configured and includes a locking part (224) and an unlocking part (225). A locking spring (223) drives the locking part (224) to push against the stop shaft (221). When the stop shaft (221) rotates to the locked position, the stop shaft (221) is located at the end of the drive shaft (21) and the unlocking part is... (225) Extending out of the bracket (25), when the stop shaft (221) rotates to the unlock position, it is located on the side of the drive shaft (21); the bracket (25) includes two bracket side plates, and the two bracket side plates are respectively provided with bracket guide grooves (251). The drive shaft (21) is provided with a transmission rod (24). The two ends of the transmission rod (24) are respectively inserted into the two bracket guide grooves (251) for sliding cooperation. One end of the transmission rod (24) passes through the bracket side plate from the bracket guide groove (251) and is inserted into the indicator (3) to drive the indicator (3) to move relative to the indicator window (121).

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