Residual-current circuit breaker with stable reset

Abstract

The utility model provides a stable reset electric leakage circuit breaker, which comprises a base, an operating mechanism and an upper cover, the base is connected with the upper cover, the operating mechanism is located between the base and the upper cover, the operating mechanism comprises a support, a lock catch, a jump pin, a U-shaped pin, a handle and an operating main body, the support comprises two side plates, the jump pin is located between the two side plates, and the U-shaped pin is located between the two side plates. The handle is rotationally connected with the top of the support through a connecting piece, shafts on the two sides of the U shape of the U-shaped pin penetrate through the jump pin and the handle respectively, the lock catch comprises a hinge portion located at the bottom of the lock catch and a stop block located on the top of the lock catch, the hinge portion is arranged between the two side plates and hinged to the two side plates, and the stop block is provided with an opening facing the jump pin and is in a horn mouth shape. One side of the opening corresponding to the jump buckle direction is wider than the other side. By adopting the above technical scheme, when an electric leakage phenomenon occurs, the release receives a signal, so that the lock catch and the jump pin are separated from each other, the opening of the stop block is arranged in a horn mouth shape, the jump pin rotates more stably, and meanwhile, the jump pin is not easy to block, high in stability and simple in structure.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a leakage circuit breaker with stable resetting. Background Art

[0002] A leakage circuit breaker is a switch that automatically operates when the leakage current in a circuit exceeds a predetermined value. Commonly used leakage circuit breakers are divided into two types: voltage type and current type. The current type is further divided into electromagnetic type and electronic type. Leakage circuit breakers are used to prevent personal electric shock and should be selected based on the different requirements of direct contact and indirect contact electric shock protection. However, the structure of existing leakage protectors is relatively complex.

[0003] Chinese patent document CN216528698U discloses a leakage circuit breaker, including a base, an operating mechanism and a bottom cover, wherein the bottom cover is connected to the base, the operating mechanism is located between the bottom cover and the base, the base is provided with a static contact and a moving contact, the operating mechanism includes a bracket, a connecting rod, a tripping buckle, a transmission rod, a lock, a handle and a tripping device, the bracket is connected to the base, the two ends of the connecting rod are respectively hinged to the handle and the tripping buckle, the handle is hinged to the bracket, the lock is provided with a lock buckle platform, one end of the tripping buckle is located on the side of the lock buckle platform facing away from the base, the other end of the tripping buckle is provided with a transmission shaft, the bracket is provided with a motion groove adapted to the transmission shaft, a contact spring is provided between the transmission rod and the base, and the handle is provided with a torsion spring.

[0004] However, the leakage circuit breaker has a complex structure and unstable operation. Utility Model Content

[0005] Based on the above problems, the utility model aims to provide a leakage circuit breaker with stable resetting.

[0006] In view of the above problems, the following technical solutions are provided: a stable reset leakage circuit breaker, comprising a base, an operating mechanism and an upper cover, wherein the base is connected to the upper cover, the operating mechanism is located between the base and the upper cover, the operating mechanism comprises a bracket, a lock, a jump buckle, a U-shaped pin and a handle, the bracket comprises two side plates, the jump buckle is located between the two side plates, the handle is rotatably connected to the bracket through a connecting piece at the top of the bracket, the axes on both sides of the U-shape of the U-shaped pin respectively penetrate the jump buckle and the handle, the lock buckle comprises a hinged portion at the bottom thereof and a stopper at the top thereof, the hinged portion is arranged between the two side plates and hingedly connected thereto, the stopper is provided with an opening towards the jump buckle direction, the opening is arranged in a trumpet shape, and the width of one side of the opening corresponding to the jump buckle direction is greater than the width of the other side.

[0007] By adopting the above technical solution, when leakage occurs, the releaser will receive a signal to disconnect the lock buckle and the jump buckle. The block opening is set in a trumpet shape, the jump buckle rotates more stably, is not easy to get stuck, has high stability and simple structure.

[0008] The utility model is further configured as follows: the block includes an L-shaped abutment and abutment portions arranged on both sides of the L-shaped abutment, the L-shaped abutment includes a connecting section arranged at the top and a butt platform arranged at the bottom, a sliding groove is arranged on one side of the opening corresponding to the connecting section, the two side walls of the sliding groove are arranged perpendicular to the connecting section, the two side walls of the opening are arranged in a trumpet shape, and the sliding groove is connected to the opening.

[0009] By adopting the above technical solution, the block includes an L-shaped stopper and stoppers arranged on both sides of the L-shaped stopper, which limits the jump buckle and makes it swing along the opening to avoid left and right deviation, and has higher stability.

[0010] The utility model is further configured as follows: the jump buckle includes a swinging part and a bending part arranged on both sides of the swinging part, the bending part is provided with a mounting hole adapted to the U-shaped pin, the side plate is provided with a strip hole whose width is adapted to the cross-sectional diameter of the U-shaped pin, and the top surface of the side plate located at the bottom position of the U-shape of the U-shaped pin is provided with a mounting opening connected to the strip hole at this position.

[0011] The U-shaped bottom of the U-shaped pin will then enter the strip hole on that side from the position of the mounting opening, and the top of the U-shaped pin will then be pushed further into the other strip hole. The insertion of the strip hole is done from the outside, with a large space, a good field of view, easier alignment, and convenient installation. After installation, the U-shaped bottom of the U-shaped pin will be located in the mounting opening and the strip hole, and will not protrude outside to occupy space, thus occupying less space.

[0012] The utility model is further configured as follows: the side panel includes a hinged head hingedly connected to the handle, the handle includes an operating portion arranged outside the upper cover and a connecting head hingedly connected to the hinged head, mounting recesses are arranged on both sides of the connecting head, the depth of the mounting recess of the connecting head corresponding to the side of the U-shaped pin end is adapted to the thickness of the side panel, the mounting recess includes a first contact surface, the hinged head abuts against the first contact surface during rotation, the first contact surface is arranged parallel to the inner side surface of the hinged head, and the area of ​​the first contact surface is larger than the area of ​​the hinged head.

[0013] By adopting the above technical solution, the hinged head abuts against the first contact surface during rotation, and the area of ​​the first contact surface is larger than the area of ​​the hinged head, so that when the handle rotates, the contact surface is large and rotates along a parallel plane, which has higher stability; the depth of the mounting recess is adapted to the thickness of the side panel, which facilitates assembly and further improves stability.

[0014] The utility model is further provided that: the mounting recess includes a second contact surface, the second contact surface is arranged on the outer periphery of the first contact surface, the second contact surface is inclined, and one end of the second contact surface corresponding to the first contact surface is higher than the other end.

[0015] By adopting the above technical solution, when rotating, the second contact surface plays a guiding role, thereby achieving the purpose of rotation tightening.

[0016] The utility model is further configured as follows: the connecting head includes an arc-shaped convex portion connected to the operating portion, a limiting recess for limiting the rotation angle of the handle is provided at the connection between the hinge head and the side plate, a torsion spring is provided between the bracket and the connecting head, and under the action of the torsion spring, the arc-shaped convex portion abuts against the limiting recess.

[0017] By adopting the above technical solution, when the handle is rotated to a specified position, under the action of the torsion spring, the arc-shaped convex portion abuts against the limiting concave portion, thereby playing a limiting role and achieving higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model.

[0019] Figure 2 It is a three-dimensional diagram of the internal structure of the utility model.

[0020] Figure 3 It is a partial structural stereogram of the utility model.

[0021] Figure 4 This is an exploded view of the local structure of the utility model

[0022] Meaning of the numbers in the figure: 1. base, 2. upper cover, 3. bracket, 31. side panel, 311. hinged head, 312. strip hole, 313. limiting recess, 4. lock, 41. hinged part, 42. block, 421. L-shaped abutment, 4211. connecting section, 4212. abutment platform, 422. stopper, 5. jump buckle, 51. swinging part, 52. bending part, 521. mounting hole, 6. U-shaped pin, 7. handle, 71. operating part, 72. connecting head, 721. mounting recess, 7211. first contact surface, 7212. second contact surface, 722. arc-shaped protrusion, 9. connecting piece, 10. torsion spring. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] Reference Figure 1-4 , a stable reset leakage circuit breaker, comprising a base 1, an operating mechanism and an upper cover 2, the base 1 is connected to the upper cover 2, the operating mechanism is located between the base 1 and the upper cover 2, the operating mechanism comprises a bracket 3, a lock 4, a jump buckle 5, a U-shaped pin 6 and a handle 7, the bracket 3 comprises two side plates 31, the jump buckle 5 is located between the two side plates 31, the handle 7 is rotatably connected to it at the top of the bracket 3 through a connecting piece 9, the axes on both sides of the U-shape of the U-shaped pin 6 respectively penetrate the jump buckle 5 and the handle 7, the lock buckle 4 comprises a hinged portion 41 at its bottom and a stopper 42 at its top, the hinged portion 41 is arranged between the two side plates 31 and hingedly connected thereto, the stopper 42 is provided with an opening towards the jump buckle 5, the opening is arranged in a trumpet shape, and the width of the opening corresponding to the jump buckle 5 direction is greater than the width of the other side.

[0025] This embodiment is further configured as follows: the stopper 42 includes an L-shaped abutment 421 and a stopper 422 arranged on both sides of the L-shaped abutment 421, the L-shaped abutment 421 includes a connecting section 4211 arranged at the top and a platform 4212 arranged at the bottom, a sliding groove is arranged on one side of the opening corresponding to the connecting section 4211, the two side walls of the sliding groove are arranged perpendicular to the connecting section 4211, the two side walls of the opening are arranged in a trumpet shape, and the sliding groove is communicated with the opening.

[0026] This embodiment is further configured as follows: the jump buckle 5 includes a swinging portion 51 and a bending portion 52 arranged on both sides of the swinging portion 51, the bending portion 52 is provided with a mounting hole 521 adapted to the U-shaped pin 6, the side plate 31 is provided with a strip hole 312 whose width is adapted to the cross-sectional diameter of the U-shaped pin 6, and the top surface of the side plate 31 located at the bottom position of the U-shape of the U-shaped pin 6 is provided with a mounting opening of the strip hole 312 connected to this position.

[0027] This embodiment is further configured as follows: the side panel 31 includes a hinged head 311 hingedly connected to the handle 7; the handle 7 includes an operating portion 71 arranged outside the upper cover 2 and a connecting head 72 hingedly connected to the hinged head 311; mounting recesses 721 are arranged on both sides of the connecting head 72; the depth of the mounting recess 721 of the connecting head 72 corresponding to one side of the end of the U-shaped pin 6 is adapted to the thickness of the side panel 31; the mounting recess 721 includes a first contact surface 7211; the hinged head 311 abuts against the first contact surface 7211 during rotation; the first contact surface 7211 is arranged parallel to the inner side surface of the hinged head 311; and the area of ​​the first contact surface 7211 is larger than that of the hinged head 311.

[0028] This embodiment further configures: the mounting recess 721 includes a second contact surface 7212, the second contact surface 7212 is arranged on the periphery of the first contact surface 7211, the second contact surface 7212 is inclined, and one end of the second contact surface 7212 corresponding to the first contact surface 7211 is higher than the other end.

[0029] This embodiment is further configured as follows: the connecting head 72 includes an arc-shaped protrusion 722 connected to the operating part 71, a limiting recess 313 for limiting the rotation angle of the handle 7 is provided at the connection between the hinge head 311 and the side plate 31, and a torsion spring 10 is provided between the bracket 3 and the connecting head 72, and under the action of the torsion spring 10, the arc-shaped protrusion 722 abuts against the limiting recess 313.

[0030] Although the present invention uses the terms such as base 1, upper cover 2, bracket 3, side plate 31, hinged head 311, bar hole 312, position limiting recess 313, lock 4, hinged part 41, stopper 42, L-shaped abutment 421, connecting section 4211, abutment platform 4212, stopper 422, jumper 5, swinging part 51, bending part 52, mounting hole 521, U-shaped pin 6, handle 7, operating part 71, connector 72, mounting recess 721, first contact surface 7211, second contact surface 7212, arc-shaped protrusion 722, connector 9, torsion spring 10, etc. more frequently, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A stable resetting leakage circuit breaker, comprising a base, an operating mechanism and an upper cover, wherein the base is connected to the upper cover, the operating mechanism is located between the base and the upper cover, and the operating mechanism comprises a bracket, a lock, a jumper, a U-shaped pin and a handle, characterized in that: The bracket includes two side plates, the jump buckle is located between the two side plates, the handle is rotatably connected to the bracket through a connecting piece at the top, the axes on both sides of the U-shape of the U-shaped pin respectively penetrate the jump buckle and the handle, the lock buckle includes a hinged portion located at the bottom and a stopper located at the top, the hinged portion is arranged between the two side plates and hingedly connected thereto, the stopper is provided with an opening toward the jump buckle direction, the opening is arranged in a trumpet shape, and the width of one side of the opening corresponding to the jump buckle direction is greater than the width of the other side.

2. A stable reset leakage circuit breaker according to claim 1, characterized in that: The stopper includes an L-shaped stopper and stoppers arranged on both sides of the L-shaped stopper, the L-shaped stopper includes a connecting section arranged at the top and a stop platform arranged at the bottom, a sliding groove is arranged on one side of the opening corresponding to the connecting section, the two side walls of the sliding groove are arranged perpendicular to the connecting section, the two side walls of the opening are arranged in a trumpet shape, and the sliding groove is connected to the opening.

3. A stable resetting leakage circuit breaker according to claim 2, characterized in that: The jump buckle includes a swinging part and a bending part arranged on both sides of the swinging part, the bending part is provided with a mounting hole adapted to the U-shaped pin, the side plate is provided with a strip hole whose width is adapted to the cross-sectional diameter of the U-shaped pin, and the top surface of the side plate located at the bottom position of the U-shape of the U-shaped pin is provided with a mounting opening connected to the strip hole at this position.

4. A stable resetting leakage circuit breaker according to claim 1, characterized in that: The side panel includes a hinged head hinged to the handle, the handle includes an operating portion arranged outside the upper cover and a connecting head hinged to the hinged head, mounting recesses are arranged on both sides of the connecting head, the depth of the mounting recess of the connecting head corresponding to the side of the U-shaped pin end is adapted to the thickness of the side panel, the mounting recess includes a first contact surface, the hinged head abuts against the first contact surface during rotation, the first contact surface is arranged parallel to the inner side surface of the hinged head, and the area of ​​the first contact surface is larger than the area of ​​the hinged head.

5. A stable resetting leakage circuit breaker according to claim 4, characterized in that: The mounting recess comprises a second contact surface, the second contact surface is arranged at the periphery of the first contact surface, the second contact surface is inclined, and one end of the second contact surface corresponding to the first contact surface is higher than the other end.

6. A stable resetting leakage circuit breaker according to claim 4, characterized in that: The connecting head includes an arc-shaped protrusion connected to the operating part, and a limiting recess for limiting the rotation angle of the handle is provided at the connection between the hinge head and the side plate. A torsion spring is provided between the bracket and the connecting head. Under the action of the torsion spring, the arc-shaped protrusion abuts against the limiting recess.

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