Compact circuit breaker

Abstract

The utility model provides a compact 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 tripping assembly, a lock catch and a reset piece, the support comprises two side plates, the tripping assembly is arranged on one side of the support, the tripping assembly comprises a tripping coil and a movable iron core, and the movable iron core is arranged on the support. The lock catch comprises a hinge portion located at the bottom of the lock catch, a blocking portion located at the top of the lock catch and an extending portion connected with the tripping assembly, the hinge portion is arranged between the two side plates and hinged to the two side plates, the blocking portion is located at the top of the hinge portion, and the extending portion is arranged on the side, corresponding to the tripping assembly, of the blocking portion. The extension part is provided with a clamping groove clamped with the movable iron core, and the reset piece is arranged between the support and the lock catch. By adopting the technical scheme, when an electric leakage phenomenon occurs, the trip coil controls the movable iron core to enable the lock catch and the jump pin to be disconnected, the structure is simple, and the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a compact circuit breaker. 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, low assembly efficiency and low stability. Utility Model Content

[0005] Based on the above problems, the utility model aims to provide a compact circuit breaker.

[0006] In view of the above problems, the following technical solutions are provided: a compact 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 trip assembly, a lock and a reset member, the bracket comprises two side plates, the trip assembly is arranged on one side of the bracket, the trip assembly comprises a trip coil and a moving iron core, the trip coil controls the moving iron core to slide back and forth toward the bracket, the lock comprises a hinged portion at the bottom thereof, a stopper at the top thereof and an extension portion connected to the trip assembly, the hinged portion is arranged between the two side plates and hinged thereto, the stopper is located at the top of the hinged portion, the extension portion is arranged on a side of the stopper corresponding to the trip assembly, a slot for engaging with the moving iron core is arranged on the extension portion, and the reset member is arranged between the bracket and the lock.

[0007] By adopting the above technical solution, a jump buckle is provided on the top of the lock buckle. When installing, the base, bracket, trip assembly, operating body and other parts are installed first. Then, when installing the lock buckle, the lock buckle can be directly installed on the bracket first, so that it is hinged on the bracket or the base to obtain the ability to swing back and forth toward the bracket. Then the reset piece can be inserted into the position between the bracket and the lock buckle. Since the base is fixed and cannot move, the lock buckle is hinged and can move. One end of the lock buckle cooperates with the jump buckle, and the other end is clamped with the moving iron core through an extension part. When leakage occurs, the releaser will receive a signal, and the trip coil controls the moving iron core to slide in the opposite direction of the bracket, thereby driving the lock buckle to rotate, so that the lock buckle and the jump buckle are disconnected. The structure is simple and the installation is convenient.

[0008] The utility model is further configured as follows: a mounting shaft is provided on the side of the hinged portion facing the side plate, a reset groove is formed between the hinged portion and the side plate, a mounting slot is provided at one end of the blocking portion corresponding to the mounting shaft, the reset member is a torsion spring, the torsion spring is sleeved on the mounting shaft and one end is clamped in the mounting slot, and the other end is clamped on the bracket.

[0009] By adopting the above technical solution, compared with the existing method in which the force exerted on the reset plate by the compression spring is transmitted and converted through the reset plate to become a force that makes it swing toward the bracket, the reset effect of the torsion spring is better. At the same time, a reset groove is provided on one side, and both ends of the torsion spring are clamped in the reset groove, so that the structure is more compact and the stability is higher. At the same time, an installation groove is provided to limit the torsion spring to prevent it from swinging, thereby further improving the stability of the torsion spring reset.

[0010] The utility model is further configured as follows: a hinge hole is provided at a position of the side panel corresponding to the mounting axis, the diameter of the hinge hole is smaller than the outer diameter of the mounting axis, the side panel and the hinge part are hingedly connected via a connecting axis, and a mounting channel matching the connecting axis is provided at a position of the mounting axis corresponding to the hinge hole.

[0011] By adopting the above technical solution, the diameter of the hinge hole is smaller than the outer diameter of the installation shaft. First, align the installation channel of the hinge part with the hinge hole, and then insert the connecting shaft. The assembly is simple and convenient, and compared with the existing clip-on, the stability is higher.

[0012] The utility model is further configured as follows: the operating mechanism also includes a jump buckle, a U-shaped pin and a handle, the jump buckle is located between the two side plates, the handle is rotatably connected to the top of the bracket through a connecting piece, the axes on both sides of the U-shape of the U-shaped pin respectively pass through the jump buckle and the handle, the connecting piece includes an operating part and a hinge shaft, and a limiting protrusion for limiting the axial movement of the connecting piece is provided on one side of the inner wall of the upper cover corresponding to the operating part, and the difference between the length of the hinge shaft and the width of the bracket is greater than the spacing between the bracket and the limiting protrusion.

[0013] By adopting the above technical solution, during installation, the two shafts of the U-shaped U-shaped pin are respectively inserted into the holes on the handle and the jump buckle to complete the connection, and the connecting piece is inserted to make the handle and the bracket hinged. The limiting protrusion and the bracket are spaced apart, and the operating part will not directly rub against the limiting protrusion. However, during the rotation of the handle and the bracket, the connecting piece may be displaced in the opposite direction of the insertion. At this time, the limiting protrusion plays a limiting role to prevent the connecting piece from being separated from the connection between the handle and the bracket, thereby enhancing the stability of the connection.

[0014] The utility model is further configured as follows: two baffles are provided at positions of the base corresponding to the bracket, the width between the baffles is adapted to the width of the bracket, mounting bosses are provided between the baffles, the bracket comprises a connecting plate connecting the lower ends of the two side plates, the length of the connecting plate is less than the length of the side plate, the connecting plate is arranged at the other end of the side plate opposite to the lock, and limiting parts for limiting the movement of the bracket are respectively provided at both ends of the mounting bosses, and the distance between the limiting parts is greater than the length of the bracket.

[0015] By adopting the above technical solution, the bracket will be stuck between the two baffles and the limiting parts at both ends. The limiting parts and baffles at both ends limit the bracket relative to its horizontal position to prevent it from rotating, which is convenient for quick positioning and installation. The process of screwing in the connecting bolts is more convenient and does not require manual fixing, making installation more convenient. After the installation is completed, the bracket will no longer rotate and is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model.

[0017] Figure 2 It is a three-dimensional diagram of the internal structure of the utility model.

[0018] Figure 3 It is a partial structural stereogram of the utility model.

[0019] Figure 4 It is an exploded view of the local structure of the utility model.

[0020] Figure 5 It is a partial structural sectional view of the utility model.

[0021] Figure 6 A three-dimensional cross-sectional view of the utility model

[0022] Meaning of the numbers in the figure: 1. base, 11. baffle, 12. mounting boss, 13. limiting part, 2. upper cover, 21. limiting convex part, 3. bracket, 31. side plate, 311. hinge hole, 32. connecting plate, 4. trip assembly, 41. trip coil, 42. moving iron core, 5. lock, 51. hinge part, 52. baffle, 521. mounting slot, 53. extension part, 531. slot, 54. mounting shaft, 541. mounting channel, 55. reset slot, 56. torsion spring, 57. connecting shaft, 6. jump buckle, 7. U-shaped pin, 8. handle, 9. connector, 91. operating part, 92. hinge shaft. 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 1-6 A compact circuit breaker includes a base 1, an operating mechanism and an upper cover 2, wherein 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 includes a bracket 3, a trip assembly 4, a lock 5 and a reset member, the bracket 3 includes two side plates 31, the trip assembly 4 is arranged on one side of the bracket 3, the trip assembly 4 includes a trip coil 41 and a moving iron core 42, the trip coil 41 controls the moving iron core 42 to move toward the bracket 3 The lock buckle 5 slides back and forth, and includes a hinged portion 51 at the bottom, a stopper 52 at the top, and an extension portion 53 connected to the tripping assembly 4. The hinged portion 51 is arranged between the two side plates 31 and is hinged thereto, the stopper 52 is located at the top of the hinged portion 51, and the extension portion 53 is arranged on a side of the stopper 52 corresponding to the tripping assembly 4. A slot 531 is provided on the extension portion 53 for engaging with the moving iron core 42, and the reset member is arranged between the bracket 3 and the lock buckle 5.

[0025] This embodiment is further configured as follows: a mounting shaft 54 ​​is provided on the side of the hinged portion 51 facing the side plate 31, a reset groove 55 is formed between the hinged portion 51 and the side plate 31, a mounting groove 531521 is provided at one end of the blocking portion 52 corresponding to the mounting shaft 54, the reset member is a torsion spring 56, the torsion spring 56 is sleeved on the mounting shaft 54 ​​and one end is clamped in the mounting groove 531521, and the other end is clamped on the bracket 3.

[0026] This embodiment is further configured as follows: a hinge hole 311 is provided at a position of the side panel 31 corresponding to the mounting shaft 54, the diameter of the hinge hole 311 is smaller than the outer diameter of the mounting shaft 54, the side panel 31 and the hinge portion 51 are hingedly connected via a connecting shaft 57, and a mounting channel 541 adapted to the connecting shaft 57 is provided at a position of the mounting shaft 54 ​​corresponding to the hinge hole 311.

[0027] This embodiment is further configured as follows: the operating mechanism also includes a jump buckle 6, a U-shaped pin 7 and a handle 8, the jump buckle 6 is located between the two side plates 31, the handle 8 is rotatably connected to 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 7 respectively penetrate the jump buckle 6 and the handle 8, the connecting piece 9 includes an operating part 91 and a hinge shaft 92, and a limiting protrusion 21 for limiting the axial movement of the connecting piece 9 is provided on one side of the inner wall of the upper cover 2 corresponding to the operating part 91, and the difference between the length of the hinge shaft 92 and the width of the bracket 3 is greater than the spacing between the bracket 3 and the limiting protrusion 21.

[0028] This embodiment is further configured as follows: two baffles 11 are provided at positions of the base 1 corresponding to the bracket 3, the width between the baffles 11 is adapted to the width of the bracket 3, a mounting boss 12 is provided between the baffles 11, the bracket 3 includes a connecting plate 32 connecting the lower ends of the two side plates 31, the length of the connecting plate 32 is less than the length of the side plate 31, the connecting plate 32 is provided at the other end of the side plate 31 opposite to the lock buckle 5, and limiting parts 13 for limiting the movement of the bracket 3 are respectively provided at both ends of the mounting boss 12, and the distance between the limiting parts 13 is greater than the length of the bracket 3.

[0029] Although the present invention uses the terms such as base 1, baffle 11, mounting boss 12, limiting part 13, upper cover 2, limiting convex part 21, bracket 3, side plate 31, hinge hole 311, connecting plate 32, trip assembly 4, trip coil 41, moving iron core 42, lock 5, hinge part 51, baffle 52, mounting slot 531521, extension part 53, slot 531, mounting shaft 54, mounting channel 541, reset groove 55, torsion spring 56, connecting shaft 57, jump buckle 6, U-shaped pin 7, handle 8, connecting piece 9, operating part 91, hinge shaft 92, etc., the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A compact 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 trip assembly, a lock and a reset member, the bracket comprises two side plates, and is characterized in that: The trip assembly is arranged on one side of the bracket, and the trip assembly includes a trip coil and a moving iron core. The trip coil controls the moving iron core to slide back and forth toward the bracket. The lock includes a hinged portion located at the bottom, a stopper located at the top, and an extension portion connected to the trip assembly. The hinged portion is arranged between the two side plates and hinged thereto, the stopper is located at the top of the hinged portion, the extension portion is arranged on one side of the stopper corresponding to the trip assembly, the extension portion is provided with a slot that is engaged with the moving iron core, and the reset member is arranged between the bracket and the lock.

2. A compact circuit breaker according to claim 1, characterized in that: A mounting shaft is provided on the side of the hinged portion facing the side plate, a reset groove is formed between the hinged portion and the side plate, a mounting slot is provided at one end of the blocking portion corresponding to the mounting shaft, the reset member is a torsion spring, the torsion spring is sleeved on the mounting shaft and one end is clamped in the mounting slot, and the other end is clamped on the bracket.

3. A compact circuit breaker according to claim 2, characterized in that: The side plate is provided with a hinge hole at a position corresponding to the mounting shaft, the diameter of the hinge hole is smaller than the outer diameter of the mounting shaft, the side plate is hingedly connected to the hinge part via a connecting shaft, and the mounting shaft is provided with a mounting channel matched with the connecting shaft at a position corresponding to the hinge hole.

4. A compact circuit breaker according to claim 1, characterized in that: The operating mechanism also includes a jump buckle, a U-shaped pin and a handle, the jump buckle is located between the two side plates, the handle is rotatably connected to the top of the bracket through a connecting piece, the axes on both sides of the U-shape of the U-shaped pin pass through the jump buckle and the handle respectively, the connecting piece includes an operating part and a hinge shaft, and a limiting protrusion for limiting the axial movement of the connecting piece is provided on one side of the inner wall of the upper cover corresponding to the operating part, and the difference between the length of the hinge shaft and the width of the bracket is greater than the spacing between the bracket and the limiting protrusion.

5. A compact circuit breaker according to claim 1, characterized in that: The base is provided with two baffles at positions corresponding to the bracket, the width between the baffles is adapted to the width of the bracket, a mounting boss is provided between the baffles, the bracket comprises a connecting plate connecting the lower ends of the two side plates, the length of the connecting plate is less than the length of the side plate, the connecting plate is provided at the other end of the side plate opposite to the lock, and limiting parts for limiting the movement of the bracket are respectively provided at both ends of the mounting boss, and the distance between the limiting parts is greater than the length of the bracket.

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