Circuit breaker

Abstract

The invention discloses a circuit breaker which comprises a fixedly arranged supporting plate, a mandrel is movably connected to the supporting plate, a conduction element connected to the mandrel in a sleeving mode is arranged on one side of the supporting plate, and the conduction element can receive rotating force of the mandrel and enables the conduction element to be switched between a switching-on state and a rotating switching-off state. A buckling element is arranged between the conduction element and the supporting plate, and when the buckling element is in a disconnected state, the conduction element is in a closed state; the advantage that the circuit is triggered to be disconnected in the mode that the pull wire drives the core shaft to rotate is very obvious, firstly, when the circuit breaker breaks down or burns open fire or has severe sparks, the pull wire is dragged by a far-away hand to trigger the circuit to be disconnected, the safety performance can be greatly improved, and complete accidents such as electric shock are avoided; and secondly, for disabled people or old people and the like, a traditional circuit breaker is inconvenient to operate, and by utilizing the technology provided by the invention, the safe electricity utilization can be greatly improved.

Description

Technical Field

[0001] The invention relates to a circuit breaker. Background Art

[0002] A circuit breaker is a very important electrical switching device that protects circuits from electrical faults such as overload and short circuit. When the current in the circuit exceeds the threshold, the circuit breaker can automatically switch the circuit to protect the circuit, prevent damage to the energized lines and equipment, and avoid dangerous situations such as fire.

[0003] The circuit breaker disconnects the circuit mainly in two modes: automatic disconnection and manual disconnection. In the manual disconnection mode, because the button is too close to the wiring line, there is a safety hazard when manually turning the switch button in the event of leakage or fire at the circuit breaker. It should also be noted that in the event of a circuit breaker failure, the switch button cannot be switched to the disconnect state in time due to concerns about safety issues, which will delay important rescue time. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a device that can utilize a traction line to drive a circuit breaker to switch from a closed state to an open state, utilize the advantages of long-distance driving, and improve the safety of operation. When the traction line drives the core shaft to rotate, under the action of the pressed spring sheet, the live wire and the neutral wire can be kept disconnected. The present invention utilizes an electromagnetic trip assembly to quickly complete the automatic circuit disconnection, effectively solving the problem that the circuit breaker cannot be operated safely when a fault occurs or there is a leakage.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0006] The circuit breaker comprises a fixed support plate, a core shaft is movably connected to the support plate, a conducting element sleeved on the core shaft is arranged on one side of the support plate, the conducting element can receive the rotational force of the core shaft and switch the conducting element between a closing state and a rotation opening state, a snap-fit ​​element is arranged between the conducting element and the support plate, when the snap-fit ​​element is in a disconnected state, the conducting element is in a closing state, and when the snap-fit ​​element is in a powered state, the conducting element is in an automatic opening state.

[0007] Based on the technical solution provided by the present invention, when the core shaft receives an external driving force, it can transmit the driving force to the movable part of the conducting element, and drive the conductive sheet arranged on the movable part to be disconnected from the circuit arranged in the circuit breaker frame. The advantage of using a traction line to drive the core shaft to rotate to trigger the circuit disconnection is very obvious. First, when the circuit breaker fails or burns an open flame or there are violent sparks, the circuit disconnection is triggered by manually pulling the traction line away, which greatly improves the safety performance and avoids complete accidents such as electric shock; second, it is convenient for special groups to operate safely. For the disabled or the elderly, traditional circuit breakers are inconvenient to operate. The technology provided by the present invention can greatly improve the safe use of electricity.

[0008] A further improvement is that the conducting element includes a positioning piece and a movable piece, both of which are sleeved on the core shaft, and a switching spring is arranged between the positioning piece and the support plate, and the elastic force provided by the switching spring pushes the positioning piece to move toward the driving end of the core shaft; its significance lies in that the core shaft is movably arranged on the support plate, and when the snap-fit ​​element is energized, the switching spring will release elastic potential energy and push the conducting element to move toward the driving end of the core shaft, thereby realizing rapid disconnection of the circuit.

[0009] Further preferably, the positioning member and the movable member are arranged at intervals, and a spacing column is provided on the positioning member, and the suspended end of the spacing column abuts against the movable member; its significance lies in that the advantage of the spacing arrangement is utilized to provide space for the effective movement of the movable member, and the movement stroke of the movable member in the direction of the central axis can also be indirectly controlled by adjusting the spacing column.

[0010] More preferably, a pressing spring is respectively provided at the upper and lower ends of the positioning member, and a conductive sheet for conducting the circuit is provided on the movable member; its function is to stabilize the position of the movable member under the action of the pressing spring to prevent the movable member from moving in the axial direction or deflecting around its own axis, and the pressing spring is made of thin metal sheet, which has the advantages of being light and convenient, and is suitable for small electrical equipment such as circuit breakers.

[0011] The above technical solution also needs to be improved in that the locking element includes a locking spring arranged on the positioning member and a restraining member arranged on the support plate, the restraining member includes a mounting frame fixed to the support plate, an electromagnetic release assembly is arranged on the mounting frame, the electromagnetic release assembly is connected to the pressing spring, an inclined guide surface is arranged on the pressing spring, a pressing surface matching the guide surface is arranged on the locking spring, the pressing spring is slidingly matched with a guide column arranged on the support plate, a pressing spring is sleeved on the outside of the guide column, and the elastic force provided by the pressing spring is used to push the pressing spring toward the center of the core shaft; its function is that the locking element is arranged on the live wire path control, when the electromagnetic release assembly in the circuit breaker is energized, the electromagnetic release assembly will drive the pressing spring to deviate from the locking spring, at this time, the switching spring will release the elastic potential energy and push the conductive sheet of the movable part to disconnect from the conductive circuit, thereby realizing the disconnection of the live wire.

[0012] Preferably, a guide column is provided on the support plate, and a guide hole matching the guide column is provided on the positioning piece. Its function is to utilize the cooperation between the guide column and the guide hole to stabilize the position of the positioning piece on the core shaft, avoid the influence of friction, and cause the positioning piece to deflect. If this technical feature is not present, once the positioning piece deflects, it will easily cause internal failure of the circuit breaker.

[0013] The above technical solution is further improved, and a conducting element sleeved on the core shaft is also provided on the other side of the support plate, and the positioning piece of the conducting element on the other side of the support plate is fixedly connected to the support plate. Its significance lies in that the conducting element on the other side of the support plate is used to control the on and off of the neutral line, and the conducting element can only accept the rotation force of the core shaft, and the axial force of the core shaft cannot be transmitted to the conducting element. When the traction line is pulled and the core shaft is driven to deflect, the conducting element can realize the disconnection of the neutral line.

[0014] Preferably, a spline groove is provided on the core shaft, and a protrusion matching the spline groove is provided on the movable part; its function is to utilize the spline groove provided on the core shaft and the protrusion provided on the movable part to realize the transmission of the rotational force on the core shaft to the movable part of the conduction element, so as to drive the conductive sheet on the movable part to deflect, and realize the incorrect arrangement of the conductive sheet and the conductive circuits on both sides.

[0015] Preferably, a reset spring is provided between the core shaft and the frame of the circuit breaker, and the elastic force provided by the reset spring pushes the core shaft to extend outward; its function is that when the line needs to be connected again, by pressing the core shaft to move inward, the switching spring and the reset spring are both contracted until the snap-fit ​​spring sheet provided on the positioning piece matches the restraint provided on the support plate, at this time, after the core shaft is released, under the action of the reset spring, the core shaft will return to its initial position.

[0016] The above technical solution is further improved in that a turntable is provided at the driving end of the core shaft, and a traction line is wound on the turntable; its function is to increase the torque by utilizing the turntable provided on the core shaft, and to avoid knotting or entanglement of the traction line, so that when the traction line is used to transmit the force to the core shaft, it can be more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure in which the support plate, the positioning parts and the movable parts match each other.

[0019] Figure 3 Schematic diagram of the structure that provides support for the core shaft for the return spring.

[0020] Figure 4 It is a schematic diagram of the structure in which the support plate and the restraining parts match each other.

[0021] Figure 5 It is a schematic diagram of the structure in which the support plate, the positioning part, the movable part and the switching spring match each other.

[0022] Figure 6 It is a schematic diagram of the structure in which the restraining member and the pressed spring piece match each other.

[0023] Figure 7 It is a schematic diagram of the structure in which the mandrel, the positioning parts and the movable parts match each other.

[0024] The symbols in the figure are:

[0025] 10. Support plate;

[0026] 20. Mandrel; 21. Turntable; 22. Return spring;

[0027] 30. Positioning piece; 31. Pressing spring piece; 32. Spacer column; 33. Snap-fit ​​spring piece;

[0028] 40. movable part; 41. conductive sheet;

[0029] 50. Constraint; 51. Mounting frame; 52. Pressed spring; 53. Electromagnetic release assembly;

[0030] 60. Switch spring. DETAILED DESCRIPTION

[0031] There are mainly two ways for a circuit breaker to disconnect a circuit. One is to use an electromagnetic trip assembly to trigger a control switch to switch to an open state. The other is to manually push the control switch to switch freely between an open state and a closed state. When a circuit breaker fails or leaks electricity, the control switch can only be pushed to switch to an open state manually. At this time, there will be certain safety hazards. In order to improve the safety of electricity use, the present invention provides an easy-to-operate circuit breaker, which can use a rope to pull the circuit breaker to switch to an open state, thereby improving safety.

[0032] like Figure 1 , 2 As shown in , 3, the circuit breaker includes a frame, a support plate 10 is fixedly mounted on the frame, a core shaft 20 is movably mounted on the support plate 10, a positioning member 30 and a movable member 40 which are sleeved on the core shaft 20 are mounted on the left side of the support plate 10, and the positioning member 30 and the movable member 40 are arranged at a distance. Specifically, a spacer column 32 is fixedly arranged on the positioning member 30, and the suspended end of the spacer column 32 abuts against the movable member 40.

[0033] A switching spring 60 is provided between the positioning member 30 and the support plate 10 , one end of the switching spring 60 abuts against the support plate 10 , and the other end abuts against the positioning member 30 . The elastic force provided by the switching spring 60 pushes the positioning member 30 toward the movable member 40 .

[0034] More importantly, a spline groove is provided on the core shaft 20, and a protrusion matching the spline groove is provided on the movable part 40; by matching the spline groove and the protrusion, the rotational force of the core shaft 20 can be transmitted to the movable part 40, while the rotational force of the core shaft 20 cannot be transmitted to the positioning part 30.

[0035] like Figure 5 As shown, a guide column is provided on the support plate 10, and a guide hole matching the guide column is provided on the positioning member 30; by matching the guide column and the guide hole, the position of the positioning member 30 can be stabilized to avoid the rotational force on the core shaft 20 being transmitted to the positioning member 30 due to friction.

[0036] like Figure 2 , 4 As shown in Figure 5, the movable part 40 is provided with a conductive sheet 41 for conducting the circuits on both sides, and the upper and lower ends of the positioning member 30 are provided with pressing spring sheets 31, which are used to limit and clamp the movable part 40; the pressing spring sheet 31 is a metal elastic sheet with good elasticity. When the rotational force of the core shaft 20 is transmitted to the movable part 40, the pressing spring sheet 31 will undergo elastic deformation along with the peripheral shape of the movable part 40 and always maintain elastic clamping on the movable part 40.

[0037] A turntable 21 is provided at the driving end of the core shaft 20 and a traction wire is coiled on the turntable 21. The core shaft 20 can be driven to rotate by pulling the traction wire. When the rotational force of the core shaft 20 is transmitted to the movable part 40, the conductive sheet provided on the movable part 40 is separated from the conductive circuit in the frame, thereby quickly cutting off the circuit. This method of cutting off the circuit is in the form of pulling the traction wire, which is far away from the conductive part of the circuit breaker. Even when the circuit breaker leaks electricity, the circuit can be cut off manually in a safer and more convenient manner.

[0038] like Figure 3-6 As shown, a snap-fit ​​element for constraining the position of the positioning member 30 is provided between the positioning member 30 and the support plate 10, the snap-fit ​​element includes a snap-fit ​​spring piece 33 provided on the positioning member 30, and a constraining member 50 provided on the support plate 10, the constraining member 50 includes a mounting frame 51 fixed to the support plate 10, an electromagnetic release assembly 53 is provided on the mounting frame 51, the electromagnetic release assembly 53 is connected to the pressing spring piece 52, the pressing spring piece 52 is provided with an inclined guide surface, the snap-fit ​​spring piece 33 is provided with a pressing surface matching the guide surface, the pressing spring piece 52 is slidably matched with the guide column provided on the support plate 10, the outer sleeve of the guide column is provided with a pressing spring, and the elastic force provided by the pressing spring is used to push the pressing spring piece to the center of the core shaft 20; the electromagnetic release assembly 53 is an existing conventional technology, which is a technical solution well known to ordinary technicians in the field, for example, in patent publication number CN 118522616 A, published on August 20, 2024, introduces the technical solutions related to the electromagnetic tripping assembly; it will not be repeated in this article.

[0039] When a short circuit or other fault occurs in the line, the electromagnetic release assembly 53 is energized and pulls the pressed spring sheet 52 away from the center of the core shaft 20. The restraining member 50 removes the restriction on the positioning member 30, and the switching spring 60 pushes the positioning member 30 and the movable member 40 to deviate from the support plate 10, thereby disconnecting the conductive sheet arranged on the movable member 40 from the wire circuit at both ends.

[0040] More optimally, a return spring 22 is provided between the core shaft 20 and the frame, and the elastic force provided by the return spring 22 is used to drive the core shaft 20 to extend outward.

[0041] When the circuit needs to be restored, by pressing the driving end of the core shaft 20, the step at the bottom of the spline groove of the core shaft 20 can transmit a force to the movable part 40, and push the movable part 40 and the positioning part 30 to move toward the support plate 10, and the snap-fit ​​spring piece 33 arranged on the positioning part 30 and the press-fit spring piece 52 on the restraining part 50 are matched again, and the restraint of the restraining part 50 on the positioning part 30 is realized.

[0042] The circuit is disconnected by pulling the traction line, and the driving end of the core shaft 20 can be rotated. Preferably, the driving end of the core shaft is provided with a knob or a groove (not marked in the figure) to drive the movable part 40 to reset; preferably, a limit member is provided in the frame body, and the limit member matches the movable part 40 and constrains the movable part 40 to rotate a maximum of 90°.

[0043] like Figure 2 , 3 As shown in Figures 7 and 8, a positioning member 30 and a movable member 40 which are sleeved on the core shaft 20 are provided on the right side of the support plate 10. The positioning member 30 is fixedly connected to the support plate 10. Preferably, a fixed guide column is provided on the support plate 10, and the positioning member 30 is fixed to the fixed guide column; a protrusion matching the spline groove on the core shaft 20 is provided on the movable member 40, and the movable member 40 can only accept the rotational force of the core shaft 20, and the positioning member 30 cannot push the movable member 40 to move along the central axis direction of the core shaft 20.

Claims

1. A circuit breaker, comprising a fixed support plate (10), a core shaft (20) movably connected to the support plate (10), a conducting element sleeved on the core shaft (20) being arranged on one side of the support plate (10), characterized in that: The conducting element can receive the rotational force of the core shaft (20) and switch the conducting element between a closed state and a rotationally opened state. A snap-fit ​​element is provided between the conducting element and the support plate (10). When the snap-fit ​​element is in an open state, the conducting element is in a closed state. When the snap-fit ​​element is in an energized state, the conducting element is in an automatically opened state.

2. The circuit breaker according to claim 1, characterized in that: The conducting element comprises a positioning member (30) and a movable member (40), wherein the positioning member (30) and the movable member (40) are both sleeved on the core shaft (20), and a switching spring (60) is arranged between the positioning member (30) and the support plate (10), wherein the elastic force provided by the switching spring (60) pushes the positioning member (30) to move toward the driving end of the core shaft (20).

3. The circuit breaker according to claim 2, characterized in that: The positioning member (30) and the movable member (40) are arranged at intervals, a spacing column (32) is provided on the positioning member (30), and a suspended end of the spacing column (32) abuts against the movable member (40).

4. The circuit breaker according to claim 3, characterized in that: A pressing spring sheet (31) is respectively arranged at the upper and lower ends of the positioning member (30), and a conductive sheet (41) for conducting the circuit is arranged on the movable member (40).

5. The circuit breaker according to claim 4, characterized in that: The snap-fit ​​element comprises a snap-fit ​​spring sheet (33) arranged on the positioning member (30) and a restraining member (50) arranged on the support plate (10); the restraining member (50) comprises a mounting frame (51) fixed to the support plate (10); an electromagnetic release assembly (53) is arranged on the mounting frame (51); the electromagnetic release assembly (53) is connected to a pressing spring sheet (52); an inclined guide surface is arranged on the pressing spring sheet (52); a pressing surface matching the guide surface is arranged on the snap-fit ​​spring sheet (33); the pressing spring sheet (52) is slidably matched with a guide column arranged on the support plate (10); a pressing spring is sleeved on the outside of the guide column; and the elastic force provided by the pressing spring is used to push the pressing spring sheet toward the center of the core shaft (20).

6. The circuit breaker according to claim 4, characterized in that: A guide column is arranged on the support plate (10), and a guide hole matching the guide column is arranged on the positioning member (30).

7. The circuit breaker according to any one of claims 1 to 6, characterized in that: A conducting element sleeved on the core shaft (20) is also provided on the other side of the support plate (10), and a positioning piece (30) of the conducting element located on the other side of the support plate (10) is fixedly connected to the support plate (10).

8. The circuit breaker according to claim 7, characterized in that: A spline groove is arranged on the core shaft (20), and a convex part matching the spline groove is arranged on the movable part (40).

9. The circuit breaker according to claim 8, characterized in that A return spring (22) is arranged between the core shaft (20) and the frame of the circuit breaker, and the elastic force provided by the return spring (22) pushes the core shaft (20) to extend outward.

10. The circuit breaker according to claim 7, characterized in that: A rotating disk (21) is arranged at the driving end of the core shaft (20), and a traction line is wound around the rotating disk (21).

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