A ground fault circuit interrupter

Abstract

The application relates to the technical field of circuit breakers and discloses a grounded circuit breaker which comprises a moving contact, a static contact, a handle, a cover body and an output end, is internally provided with a grounding component and a first connecting piece, one end of the first connecting piece is connected with the moving contact, after the moving contact is separated from the static contact during a tripping process, the moving contact drives the first connecting piece to extrude the grounding component, the grounding component is contacted with the output end to be grounded, and the grounded circuit breaker is characterized in that, during the operation process of the circuit breaker, the moving contact is connected with the output end, then when the moving contact is tripped, the grounding component is controlled to complete grounding by using a grounding power rod and a grounding force transmission rod, the safety when the switch is turned off is guaranteed, the circuit has no current after being turned off, and when the switch is turned on, the grounding function of the circuit breaker is released by first rotating a grounding reset lever and then allowing a grounding reset lever to push the grounding force transmission rod.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically a grounding circuit breaker. Background Technology

[0002] Circuit breakers, as common control switches, are widely used in existing circuits and electrical equipment as important components for controlling the opening and closing of circuits.

[0003] In the prior art, such as the application number CN202220282802.6, the subject of which is "Air Switch and Air Switch Assembly", the present invention includes a housing with a wire outlet hole; a circuit board installed inside the housing; multiple connecting wires, one end of each connecting wire being connected to the circuit board and the other end passing through the wire outlet hole and exiting the housing; and a connector electrically connected to the multiple connecting wires to enable communication between the circuit board and an external connector.

[0004] However, the air switches mentioned in the existing technology do not have a grounding function in their structure. When the switch is turned off, it cannot be completely guaranteed that there is no current in the circuit, which poses a safety hazard. Therefore, it is necessary to design a grounded circuit breaker. Summary of the Invention

[0005] The purpose of this invention is to provide a grounding circuit breaker to solve the problems in the prior art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A grounding circuit breaker includes a moving contact, a stationary contact, a handle, a cover, and an output terminal. The circuit breaker is provided with a grounding component and a first connecting member. One end of the first connecting member is connected to the moving contact. During the opening process, after the moving contact is separated from the stationary contact, the moving contact drives the first connecting member to press the grounding component, so that the grounding component contacts the output terminal and is grounded.

[0008] Furthermore, the circuit breaker is provided with a second connector and a flexible element at one end of the grounding component. When the handle moves from the open position to the middle position, the handle drives the second connector to squeeze the first connector, causing the first connector to disengage from the grounding component. At this time, the grounding component disengages from the output terminal under the action of the flexible element, thus disconnecting the output terminal from the ground.

[0009] Furthermore, the first connecting member includes a grounding power rod and a grounding force transmission rod. The grounding power rod is disposed between the moving contact and the grounding force transmission rod and is used to push the grounding force transmission rod to rotate when the circuit is opened.

[0010] Furthermore, the second connecting member includes a grounding reset pry bar, which includes a main rod. One end of the main rod is provided with a guide rod at an incline, and the other end is provided with an arc surface. The end of the guide rod away from the main rod is provided with an elastic element, which is fixed to the inner side of the cover.

[0011] Furthermore, the second connector also includes a grounding reset lever, which includes a rod body. One end of the rod body is provided with a sloping sliding surface that cooperates with the arc surface, and the other end is fixedly provided with an elastic element three, which is installed on the inner side of the cover body.

[0012] A protrusion is fixedly provided on the rod body, and a hook is fixedly provided on the rod body at one end near the elastic element three. An elastic element four for connecting and supporting the rod body is fixedly provided inside the circuit breaker.

[0013] Furthermore, the circuit breaker also includes a torsion spring mounted on the grounding force transmission rod. The force transmission rod includes a rotating block, on which a push rod and a drive plate are fixedly mounted. The drive plate is perpendicularly connected to the rotating block. The rotating block has a pin hole, in which a pin is installed. An arc-shaped groove is provided on the side of the pin hole near the drive plate.

[0014] Furthermore, a contact piece is fixedly provided on the output end, and the grounding component includes a straight rod. Several guide pieces for connecting the contact piece are fixedly provided on one side of the straight rod, and a recessed part for contacting the grounding force transmission rod is provided on the straight rod.

[0015] One end of the straight rod is connected to the second elastic element, and the other end is fixed with a grounding wire. The second elastic element is fixed inside the cover.

[0016] Furthermore, a protrusion is fixedly provided on the top of the cover body, and a lever is fixedly provided on one side of the handle.

[0017] When the handle switches from the open state to the intermediate state, the lever engages with the hook body, the grounding reset lever moves, and the inclined sliding surface engages with the arc surface, causing the grounding reset pry bar to move. During the movement of the grounding reset pry bar, the guide rod pushes the drive plate upward and disengages from the recessed part. At this time, the grounding component moves under the action of the elastic element two, causing the guide plate to disengage from the contact plate, and the output terminal is released.

[0018] Furthermore, when the handle switches from the closed state to the middle position, the protrusion squeezes the protrusion, causing the lever to disengage from the hook body, and the elastic element pushes the grounding reset lever to reset.

[0019] Furthermore, an indicator light for indicating the circuit breaker's opening and closing status is provided between the grounding reset pry bar and the grounding component.

[0020] Furthermore, the cover is provided with a locking element for locking the operation of the circuit breaker.

[0021] Furthermore, the cover is a transparent cover.

[0022] The beneficial effects of this invention are:

[0023] 1. The grounded circuit breaker of the present invention connects the moving contact to the output terminal during the operation of the circuit breaker. Then, when the moving contact is opened, the grounding power rod and the grounding force rod are used to control the grounding component to complete the grounding, ensuring the safety when the switch is opened and ensuring that there is no current in the circuit after the switch is opened.

[0024] 2. The present invention is a grounded circuit breaker. When closing the circuit, the grounding reset lever is first moved to allow the grounding reset pry bar to push the grounding force transmission rod, thereby releasing the grounding of the circuit breaker. After the grounding is disconnected, the circuit breaker closing operation continues. The operation process is stable and reliable. The transparent panel structure allows for direct observation of changes in the internal structure and indicator lights of the circuit breaker, ensuring the circuit breaker's opening and closing. It also has a locking mechanism to ensure the safety of single-person operation. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of the grounding circuit breaker of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker of the present invention;

[0028] Figure 3 This is the present invention. Figure 2 Enlarged structural diagram at point A in the middle;

[0029] Figure 4 This is the present invention. Figure 2 Enlarged structural diagram at point B;

[0030] Figure 5 This is a schematic diagram of the handle of the present invention in the closed state;

[0031] Figure 6 This is a schematic diagram of the handle of the present invention in the ground disconnected state;

[0032] Figure 7 This is a schematic diagram of the handle of the present invention in the open state;

[0033] Figure 8 This is a schematic diagram of the rotating component of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the cover of the present invention;

[0035] Figure 10 This is a schematic diagram of the internal structure of the cover of the present invention.

[0036] The annotations in the attached figures are explained as follows:

[0037] 1. Outer shell; 2. Grounding power rod; 3. Grounding force transmission rod; 4. Grounding reset pry bar; 5. Grounding component; 6. Grounding reset lever; 8. Output end; 9. Lock; 10. Protrusion; 11. Terminal slot; 12. Cover; 13. Handle; 14. Arc extinguishing chamber; 15. Moving contact; 16. Contact bracket; 17. Lever; 21. Connecting part; 22. Bending part; 30. Torsion spring; 31. Rotating block; 32. Pin; 33. Push rod; 34. Drive plate; 35. Arc groove; 41. Main rod; 42. Arc surface; 43. Elastic element one; 44. Guide rod; 51. Straight rod; 52. Guide plate; 53. Elastic element two; 54. Recessed part; 61. Rod body; 62. Sloping surface; 63. Elastic element four; 64. Protrusion; 65. Elastic element three; 66. Hook; 81. Contact piece. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] A type of grounding circuit breaker, such as Figure 1 As shown, the grounding circuit breaker includes a housing 1, with terminal slots 11 at both ends of the housing 1. Multiple terminal slots 11 are provided for installing multiple sets of wires. A cover 12 is fixed on the housing 1. The cover 12 has a transparent structure and is made of transparent materials such as polycarbonate.

[0040] like Figures 2-4 As shown, an arc-extinguishing chamber 14 is fixedly provided inside the outer casing 1, and a stationary contact is fixedly provided inside the arc-extinguishing chamber 14. The stationary contact is connected to the terminal slot 11 at one end of the outer casing 1. A handle 13 is rotatably provided inside the outer casing 1 to operate the internal moving contact 15 of the circuit breaker to rotate. The moving contact 15 is connected to the terminal slot 11 at the other end of the outer casing 1 through a flexible connection. The moving contact moves within the arc-extinguishing chamber 14 and connects with the stationary contact to conduct the circuit.

[0041] The housing 1 has a rotating contact bracket 16 inside, which operates multiple moving contacts 15 to rotate. The handle 13 is fixedly installed on the upper end of the contact bracket 16 and is used to operate the contact bracket 16 to rotate. Several output terminals 8 are fixedly provided in the terminal slot 11. The output terminals 8 are provided with contact pieces 81. The output terminals 8 are connected to the moving contacts 15 through a soft connection.

[0042] A grounding force transmission rod 3 is rotatably provided inside the cover 12. A grounding power rod 2 is provided on one side of the grounding force transmission rod 3, and a grounding reset pry bar 4 and a grounding component 5 are provided on the other side. The grounding reset pry bar 4 and the grounding component 5 are arranged in parallel and are both slidably mounted on the outer shell 1. A grounding reset lever 6 is provided at the end of the grounding component 5 away from the grounding force transmission rod 3.

[0043] like Figures 5-8 As shown, one end of the grounding power rod 2 is fixedly provided with a connecting part 21, and the other end is fixedly provided with a bending part 22. The moving contact 15 has an insertion hole on its side. The end of the connecting part 21 is bent and connected to the insertion hole on the moving contact 15. The bending part 22 is bent into a "U" shape, so that the grounding power rod 2 is installed between the moving contact 15 and the grounding force transmission rod 3 to drive the grounding force transmission rod 3 to rotate.

[0044] The grounding force transmission rod 3 includes a rotating block 31 rotatably disposed inside the cover 12. A push rod 33 is fixedly disposed on one side of the rotating block 31. A drive plate 34 is vertically disposed at one end of the push rod 33. The drive plate 34 is fixedly connected to the rotating block 31. A pin hole is provided on the rotating block 31. A pin 32 is installed in the pin hole. The pin 32 is fixedly connected to the cover 12, so that the rotating block 31 is rotatably connected to the cover 12. An arc-shaped groove 35 is provided on the side of the pin hole near the drive plate 34. A torsion spring 30 is fixedly disposed at the lower end of the pin 32. One end of the torsion spring 30 is connected to the rotating block 31 to provide elastic force for the rotating block 31 to reset.

[0045] The grounding reset pry bar 4 includes a main rod 41 that slides within the cover 12. The main rod 41 is slidably installed with the outer shell 1 and slides horizontally between the outer shell 1 and the cover 12. One end of the main rod 41 is provided with an inclined guide rod 44. The connection between the guide rod 44 and the main rod 41 is an inclined surface. When the grounding reset pry bar 4 moves toward the grounding force transmission rod 3, the drive plate 34 moves along the guide rod 44 onto the main rod 41. At this time, the drive plate 34 of the grounding force transmission rod 3 tilts up, releasing the fixation of the grounding component 5. The arc-shaped groove 35 provides space for the pin 32 when the grounding force transmission rod 3 rotates vertically.

[0046] The guide rod 44 is fitted with an elastic element 43 at one end away from the main rod 41. The elastic element 43 is connected to the inner wall of the cover 12. The other end of the main rod 41 is provided with an arc surface 42.

[0047] The grounding component 5 is located on the side of the grounding reset lever 4 away from the grounding force transmission lever 3. The grounding component 5 is horizontally slidably connected to the outer casing 1. The grounding component 5 includes a straight rod 51 that slides inside the cover 12. Several guide plates 52 are fixedly provided on one side of the straight rod 51.

[0048] A recessed portion 54 is provided on the straight rod 51, which fits against the drive plate 34. An elastic element 53 is fitted on one end of the straight rod 51 away from the drive plate 34, and a grounding wire is fixedly connected to the other end. The guide plate 52 and the contact plate 81 are connected when the switch is open, so that the output terminal of the circuit breaker is grounded when the circuit breaker is opened, thereby improving safety. The elastic element 53 is fixedly connected to the inner wall of the cover 12.

[0049] An indicator light is installed between the grounding reset lever 4 and the grounding component 5. The indicator light is connected to the internal wiring of the circuit breaker and is used to indicate the open and closed status of the circuit breaker, so that users can observe and judge whether the circuit breaker is open or closed.

[0050] A lever 17 is provided on one side of the handle 13, and the lever 17 is located above the grounding reset lever 6.

[0051] The grounding reset lever 6 includes a rod 61 that slides within the cover 12. One end of the rod 61 is provided with an inclined sliding surface 62, and the other end is connected to an elastic element 65. A protrusion 64 is fixedly provided on the rod 61, and a hook 66 is fixedly provided on the end of the rod 61 that is close to the elastic element 65.

[0052] The hook 66 cooperates with the lever 17. The cover 12 is fixedly provided with a protrusion 10, which is located above the protrusion 64. The lower part of the rod 61 is provided with an elastic element 63, which is fixedly connected to the outer shell 1. When the rod 61 slides on the outer shell 1, the elastic element 63 supports the rod 61.

[0053] Then deduct from the state to the intermediate state, such as Figure 7 As shown, the circuit breaker handle 13 is in the re-engaged state at this time. Then, the handle 13 is rotated clockwise, the lever 17 contacts the hook body 66, and drives the rod body 61 to move to the right. The elastic element 65 is compressed, and the protrusion 64 gradually moves to the left of the protrusion 10, and then passes the protrusion 10 to the right of the protrusion 10. During this process, the inclined sliding surface 62 cooperates with the arc surface 42 to gradually push the ground reset pry bar 4 to move towards the ground transmission rod 3. When the drive plate 34 moves to the main rod 41, the drive plate 34 of the ground transmission rod 3 tilts up, releasing the restriction on the grounding component 5. The grounding component 5 moves under the elastic force of the elastic element 53 and gradually disconnects the grounding state of the output terminal.

[0054] In the above-described operating process, when the protrusion 64 passes the protrusion 10, the rod 61 compresses the elastic element 63 downwards, and then smoothly passes the protrusion 10. The elastic element 63 pushes the rod 61 back to its original position, and at the same time, the lever 17 passes the hook 66. Figure 6 The diagram shows the intermediate state, where the bump 64 is limited by the bump 10 to maintain the intermediate state.

[0055] From the intermediate state to the closed state, continue to rotate handle 13 clockwise. Handle 13 operates the moving contact 15 to rotate and contact the stationary contact, completing the closing operation. Figure 5 The handle 13 shown is in the closed state, at which time the grounding power rod 2 is fixed between the moving contact 15 and the grounding force transmission rod 3.

[0056] During the tripping process, the operating handle 13 is first moved from the closed state to the intermediate state. At this time, the lever 17 contacts the hook body 66 and pushes the hook body 66 to move, causing the protrusion 64 to move from the right side of the protrusion 10 to the left side of the protrusion 10, thus releasing the restriction on the grounding reset lever 4. The elastic element 3 65 pushes the lever body 61 to reset, and the elastic element 1 43 pushes the grounding reset lever 4 to move towards the grounding reset lever 6, away from the grounding force transmission rod 3. At this time, the grounding force transmission rod 3 is reset under the action of the torsion spring 30 until it is located at the concave part 54.

[0057] Furthermore, during the process of the protrusion 64 moving from the right side of the protrusion 10 to the left side of the protrusion 10, the grounding reset lever 6 moves downward. At this time, the lever 17 will disengage from the reset lever 6. Then, when moving from the intermediate state to the re-clamping state, the lever 17 will move to engage with the hook 66, so that the grounding reset lever 6 can be moved again when moving from the re-clamping state to the intermediate state in the next operation.

[0058] The moving contact 15 moves away from the stationary contact to complete the circuit breaker opening. The arc generated during the circuit breaker opening process is extinguished in the arc extinguishing chamber 14. The movement of the moving contact 15 causes the grounding power rod 2 to push the grounding force transmission rod 3, thereby controlling the grounding component 5 to complete the grounding action.

[0059] Then, it transitions from the intermediate state to the deactivated state, improving safety when the switch is off.

[0060] In this embodiment, a locking device 9 is provided on the circuit breaker to prevent others from accidentally opening it and causing danger during construction after the circuit breaker is tripped. The locking device 9 is of model DNLO.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A grounding circuit breaker, the circuit breaker comprising a moving contact (15), a stationary contact, a handle (13), a cover (12), and an output terminal (8), characterized in that, The circuit breaker is provided with a grounding component (5) and a first connector. One end of the first connector is connected to the moving contact. During the opening process, after the moving contact is separated from the stationary contact, the moving contact drives the first connector to squeeze the grounding component (5), so that the grounding component (5) contacts the output terminal (8) and is grounded. The first connecting member includes a grounding power rod (2) and a grounding force transmission rod (3). The grounding power rod (2) is located between the moving contact (15) and the grounding force transmission rod (3) and is used to push the grounding force transmission rod (3) to rotate when the circuit is opened.

2. The grounding circuit breaker according to claim 1, characterized in that, The circuit breaker is provided with a second connector. One end of the grounding component (5) is provided with an elastic element (53). When the handle (13) moves from the open position to the middle position, the handle (13) drives the second connector to squeeze the first connector, causing the first connector to separate from the grounding component (5). At this time, the grounding component (5) is separated from the output terminal (8) under the action of the elastic element (53), causing the output terminal (8) to be disconnected from the ground.

3. The grounding circuit breaker according to claim 2, characterized in that, The second connector includes a grounding reset pry bar (4), which includes a main rod (41). One end of the main rod (41) is provided with a guide rod (44) at an incline, and the other end is provided with an arc surface (42). The end of the guide rod (44) away from the main rod (41) is provided with an elastic element (43), which is fixed to the inside of the cover (12).

4. The grounding circuit breaker according to claim 3, characterized in that, The second connector also includes a grounding reset lever (6), which includes a rod (61). One end of the rod (61) is provided with a sloping sliding surface (62) that cooperates with the arc surface (42), and the other end is fixedly provided with an elastic element three (65). The elastic element three (65) is installed on the inner side of the cover (12). A protrusion (64) is fixedly provided on the rod (61), and a hook (66) is fixedly provided on one end of the rod (61) near the elastic element three (65). An elastic element four (63) for connecting and supporting the rod (61) is fixedly provided inside the circuit breaker.

5. The grounding circuit breaker according to claim 4, characterized in that, The circuit breaker also includes a torsion spring (30) installed on the grounding force transmission rod (3). The force transmission rod (3) includes a rotating block (31). A push rod (33) and a drive plate (34) are fixedly provided on the rotating block (31). The drive plate (34) is perpendicularly connected to the rotating block (31). The rotating block (31) is provided with a pin hole. A pin (32) is installed in the pin hole. An arc groove (35) is provided on the side of the pin hole near the drive plate (34).

6. The grounding circuit breaker according to claim 5, characterized in that, The output terminal (8) is fixedly provided with a contact piece (81), and the grounding component (5) includes a straight rod (51). A number of guide pieces (52) for connecting the contact piece (81) are fixedly provided on one side of the straight rod (51), and a recessed part (54) for contacting the grounding force transmission rod (3) is provided on the straight rod (51). One end of the straight rod (51) is connected to the second elastic element (53), and the other end is fixed with a grounding wire. The second elastic element (53) is fixed inside the cover (12).

7. The grounding circuit breaker according to claim 6, characterized in that, The inner top of the cover (12) is fixedly provided with a protrusion (10), and a lever (17) is fixedly provided on one side of the handle (13). When the handle (13) switches from the open state to the intermediate state, the lever (17) cooperates with the hook (66), the ground reset lever (6) moves, the inclined sliding surface (62) cooperates with the arc surface (42), and the ground reset pry bar (4) moves. During the movement of the ground reset pry bar (4), the guide rod (44) pushes the drive plate (34) to move upward and disengage from the recess (54). At this time, the grounding component (5) moves under the action of the elastic element (53), causing the guide plate (52) to disengage from the contact plate (81), and the output end (8) is released.

8. The grounding circuit breaker according to claim 7, characterized in that, When the handle (13) switches from the closed state to the middle position, the protrusion (10) squeezes the protrusion (64), causing the lever (17) to disengage from the hook (66), and the elastic element (65) pushes the grounding reset lever (6) to reset.

9. The grounding circuit breaker according to claim 3, characterized in that, An indicator light for indicating the opening and closing status of the circuit breaker is provided between the grounding reset pry bar (4) and the grounding component (5).

10. The grounding circuit breaker according to claim 1, characterized in that, The cover (12) is provided with a lock (9) for locking the operation of the circuit breaker.

11. The grounding circuit breaker according to any one of claims 1-10, characterized in that, The cover (12) is a transparent cover.

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