A compact construction leakage circuit breaker

Abstract

The utility model provides a compact structure's electric leakage circuit breaker, including base, operating mechanism and upper cover, base and upper cover detachably connected, operating mechanism is located between base and upper cover, operating mechanism includes tripping coil, test subassembly and linkage assembly, linkage assembly includes support, lock catch, jump catch, U shape pin and handle, support includes two side plates, jump catch is located between two side plates, handle is rotatedly connected with its through connecting piece at the top of support, the shaft of U shape both sides of U shape pin is penetrated jump catch and handle respectively, base is equipped with first circuit board, test subassembly includes test button, test dynamic sheet, test conducting part, is provided with first installation hole for installing test dynamic sheet and second installation hole for installing test conducting part on the circuit board, test button and test conducting part are set up upside and downside, test dynamic sheet includes movable part, plug-in part and connecting part, and the connecting part and movable part are set up in inverted L type between, tripping coil is connected with circuit board.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a compact residual current circuit breaker. Background Technology

[0002] A residual current circuit breaker (RCCB) is a switch that automatically trips when the leakage current in a circuit exceeds a predetermined value. Commonly used RCCBs are divided into two types: voltage-type and current-type. The current-type RCCB is further divided into electromagnetic type and electronic type. RCCBs are used to prevent electric shock and should be selected according to the different requirements of protection against direct and indirect contact. However, existing RCCBs have complex structures, are troublesome to assemble, and are not compact enough. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a compact residual current circuit breaker.

[0004] To address the above problems, the following technical solution is provided: A compact residual current circuit breaker (RCCB) includes a base, an operating mechanism, and a top cover. The base and the top cover are detachably connected. The operating mechanism is located between the base and the top cover. The operating mechanism includes a trip coil, a test assembly, and a linkage assembly. The linkage assembly includes a bracket, a latch, a trip latch, a U-shaped pin, and a handle. The bracket includes two side plates, and the trip latch is located between the two side plates. The handle is rotatably connected to the top of the bracket via a connector. The shafts on both sides of the U-shaped pin pass through the trip latch. The base is provided with a first circuit board, and the test assembly includes a test button, a test movable piece, and a test conductive element. The circuit board is provided with a first mounting hole for mounting the test movable piece and a second mounting hole for mounting the test conductive element. The test button and the test conductive element are arranged vertically. The test movable piece includes a movable part disposed between the test button and the test conductive element, a plug-in part connected to the mounting slot, and a connecting part for connecting the movable part and the plug-in part. The connecting part and the movable part are arranged in an inverted L-shape. The trip coil is connected to the circuit board.

[0005] By adopting the above technical solution, compared with the existing test components which are longer and fixed by fasteners, the present invention has a simple structure, is easy to install, has high assembly efficiency, is shorter overall, and has a compact structure. When it is necessary to test the breaking performance of the leakage current circuit breaker, the test button can be pressed. The test button presses down on the movable part, so that the movable part contacts the test conductive part below. After contact, the circuit board will transmit the electrical signal to the test conductive part through the test moving piece. The other end of the test conductive part is also connected to the circuit board, thus forming a complete circuit. At this time, the trip coil receives the signal transmitted in the complete circuit and will be triggered to break the circuit breaker. Compared with the existing test moving piece and test conductive part which are misaligned, the present invention has corresponding upper and lower parts, which shortens the pressing stroke and makes the structure more compact.

[0006] The present invention further comprises: the longitudinal section of the test conductive component is T-shaped, and the test conductive component is provided with two or more mounting protrusions at one end corresponding to the first circuit board, the mounting protrusions being adapted to the second mounting holes, and the mounting protrusions being arranged vertically.

[0007] By adopting the above technical solution, the test conductive component has a smaller contact surface with the test moving piece compared to a cylindrical one, making it easier to slip. The longitudinal section of the test conductive component is T-shaped, increasing the contact surface with the test moving piece. At the same time, the test conductive component is connected to the first circuit board at multiple points, resulting in higher stability. Compared to a T-shaped cross-section, a T-shaped longitudinal section makes full use of space, making the overall structure of the circuit breaker more compact.

[0008] The present invention further comprises: the tripping assembly consisting of a mounting base, a coil, and a moving iron core; the mounting base includes a mounting part connected to the circuit board, a mounting shaft for mounting the coil, and a limiting part disposed at the other end of the mounting shaft opposite to the mounting part; the limiting part is provided with a mounting through hole adapted to the moving iron core; the mounting shaft is hollow and has a movable channel; the movable channel is connected to the mounting through hole; one end of the moving iron core passes through the mounting through hole and is disposed in the movable channel; and the other end is provided with a linkage part for driving the latch to move.

[0009] By adopting the above technical solutions, the structure is simplified, assembly efficiency is improved, and costs are saved.

[0010] This utility model further includes: receiving grooves on both sides of the base, and a wiring assembly for connecting wires is installed in the receiving groove. The wiring assembly includes a conductive plate, a wiring screw, and a washer. The conductive plate includes a first connecting segment, a second connecting segment, and a third connecting segment connected in a Z-shape. The first connecting segment has a connecting hole adapted to the wiring screw. The washer is disposed between the first connecting segment and the wiring screw. The third connecting segment has a stationary contact. The linkage assembly also includes movable contact plates disposed on both sides of the bracket and linked with the jumper. The movable contact plate includes a connecting end fixed to the base by a screw and a movable end that cooperates with the stationary contact. The movable end is disposed above the stationary contact and has a movable contact that cooperates with the stationary contact.

[0011] By adopting the above technical solution, compared with the existing wiring assemblies which are assembled from multiple components such as a first conductive sheet, a second conductive sheet, a clamp, and fasteners, this technical solution only requires one conductive sheet per set, which simplifies the structure, reduces the depth of the receiving groove, facilitates rapid assembly, and reduces costs.

[0012] The present invention further comprises: the other side of the base relative to the top cover is the bottom, and the bottom of the base is provided with a receiving groove for installing the second circuit board below the position of the linkage component; the third connecting segment is provided with a fourth connecting segment connected to the second circuit board at the other end relative to the second connecting segment; and the base is provided with a connecting through hole communicating with the receiving groove at the position of the fourth connecting segment.

[0013] By adopting the above technical solution, the space at the bottom of the base is fully utilized, making installation convenient and the structure more compact. At the same time, the fourth connecting section is inserted into the receiving groove through the connecting through hole, which further enhances the stability of the conductive sheet connection. Meanwhile, the fourth connecting section is connected to the second circuit board, which facilitates the quick assembly and connection of the conductive sheet and the second circuit board without the need for additional wires.

[0014] The present invention further comprises: a bottom cover for shielding the receiving groove at the bottom of the base; an assembly cavity for receiving the bottom cover at the bottom of the base; screw holes for fixing the bottom cover on the bottom wall of the assembly cavity; a mounting groove disposed in the assembly cavity and communicating with the assembly cavity; the depth of the assembly cavity being adapted to the bottom cover; a positioning bolt for fixing the first connecting segment being disposed in the assembly cavity at the position corresponding to the first connecting segment; and an assembly hole being disposed in the base at the position corresponding to the positioning bolt, the assembly hole being located between the connecting hole and the second connecting segment.

[0015] By adopting the above technical solution, the assembly cavity is set to facilitate the quick installation of the bottom cover, the positioning bolts are set in conjunction with the wiring screws to fix the first connecting section at the top and bottom respectively, which further enhances the stability of the conductive sheet connection, and the assembly hole is set to facilitate the quick assembly of the positioning bolts.

[0016] The present invention further includes an insulating sheet provided between the second circuit board and the bottom wall of the receiving groove.

[0017] By adopting the above technical solutions, the safety of circuit breakers can be further improved, and they can be easily and quickly assembled. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a partial three-dimensional structure of the present invention. Figure 1 .

[0020] Figure 3 This is a partial three-dimensional structure of the present invention. Figure 2 .

[0021] Figure 4 This is a partial structural cross-sectional view of the present invention.

[0022] Figure 5 This is an exploded view of a partial structure of this utility model.

[0023] The labels in the diagram have the following meanings: 1. Base, 11. First circuit board, 111. First mounting hole, 112. Second mounting hole, 12. Receiving groove, 13. Receiving groove, 14. Connecting through hole, 15. Assembly cavity, 16. Screw hole, 17. Assembly hole, 2. Operating mechanism, 21. Tripping coil, 211. Mounting seat, 2111. Mounting part, 2112. Mounting shaft, 2113. Limiting part, 2114. Mounting through hole, 2115. Movable channel, 213. Moving iron core, 2131. Linkage part, 22. Test component, 221. Test button, 222. Test moving piece, 2221. Movable part, 2222. Plug-in part, 2223. Connecting part, 223. Test conductive component, 2231. Mounting protrusion, 23. Linkage assembly, 231. Bracket, 2311. Side plate, 232. Lock, 233. Jumper, 234. U-pin, 235. Handle, 236. Connector, 237. Moving contact, 2371. Connecting end, 2372. Movable end, 2373. Moving contact, 3. Top cover, 4. Wiring assembly, 41. Conductive sheet, 411. First connecting section, 4111. Connecting hole, 412. Second connecting section, 413. Third connecting section, 4131. Stationary contact, 414. Fourth connecting section, 42. Wiring screw, 43. Washer, 5. Bottom cover, 6. Positioning bolt, 7. Insulating sheet, 8. Second circuit board. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0025] Reference Appendix Figure 1-5 A compact residual current circuit breaker includes a base 1, an operating mechanism 2, and a top cover 3. The base 1 and the top cover 3 are detachably connected. The operating mechanism 2 is located between the base 1 and the top cover 3. The operating mechanism 2 includes a trip coil 21, a test assembly 22, and a linkage assembly 23. The linkage assembly 23 includes a bracket 231, a latch 232, a trip latch 233, a U-shaped pin 234, and a handle 235. The bracket 231 includes two side plates 2311. The trip latch 233 is located between the two side plates 2311. The handle 235 is rotatably connected to the top of the bracket 231 via a connector 236. The shafts on both sides of the U-shaped pin 234 pass through the trip latch 233 and the handle 235, respectively. The base 1... A first circuit board 11 is provided. The test assembly 22 includes a test button 221, a test movable piece 222, and a test conductive element 223. The circuit board is provided with a first mounting hole 111 for mounting the test movable piece 222 and a second mounting hole 112 for mounting the test conductive element 223. The test button 221 and the test conductive element 223 are arranged vertically. The test movable piece 222 includes a movable part 2221 disposed between the test button 221 and the test conductive element 223, a plug-in part 2222 connected to the mounting slot, and a connecting part 2223 for connecting the movable part 2221 and the plug-in part 2222. The connecting part 2223 and the movable part 2221 are arranged in an inverted L-shape. The trip coil 21 is connected to the circuit board.

[0026] In this embodiment, the longitudinal section of the test conductive element 223 is T-shaped, and the test conductive element 223 has two or more mounting protrusions 2231 at one end corresponding to the first circuit board 11. The mounting protrusions 2231 are adapted to the second mounting hole 112, and the mounting protrusions 2231 are arranged vertically.

[0027] This embodiment further includes the following configuration: the tripping assembly consists of a mounting base 211, a coil, and a moving iron core 213. The mounting base 211 includes a mounting part 2111 connected to the circuit board, a mounting shaft 2112 for mounting the coil, and a limiting part 2113 located at the other end of the mounting shaft 2112 opposite to the mounting part 2111. The limiting part 2113 is provided with a mounting through hole 2114 adapted to the moving iron core 213. The mounting shaft 2112 is hollow and has a movable channel 2115 connected to the mounting through hole 2114. One end of the moving iron core 213 passes through the mounting through hole 2114 and is located in the movable channel 2115, while the other end is provided with a linkage part 2131 for driving the latch 232 to move.

[0028] This embodiment further includes: receiving grooves 12 on both sides of the base 1, and a wiring assembly 4 for connecting wires is installed in the receiving groove 12. The wiring assembly 4 includes a conductive plate 41, a wiring screw 42, and a washer 43. The conductive plate 41 includes a first connecting segment 411, a second connecting segment 412, and a third connecting segment 413 connected in a Z-shape. The first connecting segment 411 has a connecting hole 4111 adapted to the wiring screw 42. The washer 43 is disposed between the first connecting segment 411 and the wiring screw 42. Between the wire screws 42, a stationary contact 4131 is provided on the third connecting section 413. The linkage assembly 23 also includes movable contact pieces 237 respectively provided on both sides of the bracket 231 and linked with the jumper 233. The movable contact piece 237 includes a connecting end 2371 fixed to the base 1 by screws and a movable end 2372 that cooperates with the stationary contact 4131. The movable end 2372 is provided above the stationary contact 4131 and has a movable contact 2373 that cooperates with the stationary contact 4131.

[0029] In this embodiment, the base 1 is further configured such that the other side of the base 1 relative to the top cover 3 is the bottom, and the bottom of the base 1 is provided with a receiving groove 13 for installing the second circuit board 8 below the position of the linkage component 23. The third connecting segment 413 is provided with a fourth connecting segment 414 at the other end relative to the second connecting segment 412, which is connected to the second circuit board 8. The base 1 is provided with a connecting through hole 14 communicating with the receiving groove 13 at the position of the fourth connecting segment 414.

[0030] This embodiment further includes: a bottom cover 5 for shielding the receiving groove 13 is provided at the bottom of the base 1; an assembly cavity 15 for receiving the bottom cover 5 is provided at the bottom of the base 1; a screw hole 16 for fixing the bottom cover 5 is provided on the bottom wall of the assembly cavity 15; the mounting groove is provided inside the assembly cavity 15 and communicates with the assembly cavity 15; the depth of the assembly cavity 15 is adapted to the bottom cover 5; a positioning bolt 6 for fixing the first connecting section 411 is provided at the position of the first connecting section 411 in the assembly cavity 15; an assembly hole 17 is provided at the position of the positioning bolt 6 in the base 1; and the assembly hole 17 is located between the connecting hole 4111 and the second connecting section 412.

[0031] In this embodiment, an insulating sheet 7 is provided between the second circuit board 8 and the bottom wall of the receiving groove 13.

[0032] Although this paper extensively uses the following components: base 1, first circuit board 11, first mounting hole 111, second mounting hole 112, receiving groove 12, receiving groove 13, connecting through hole 14, assembly cavity 15, screw hole 16, assembly hole 17, operating mechanism 2, trip coil 21, mounting base 211, mounting part 2111, mounting shaft 2112, limiting part 2113, mounting through hole 2114, moving channel 2115, moving iron core 213, linkage part 2131, test assembly 22, test button 221, test moving piece 222, moving part 2221, plug-in part 2222, connecting part 2223, test conductive element 223, and mounting plate, etc. The terminology used includes protrusion 2231, linkage assembly 23, bracket 231, side plate 2311, latch 232, jumper 233, U-pin 234, handle 235, connector 236, moving contact piece 237, connecting end 2371, movable end 2372, moving contact 2373, top cover 3, wiring assembly 4, conductive sheet 41, first connecting section 411, connecting hole 4111, second connecting section 412, third connecting section 413, stationary contact 4131, fourth connecting section 414, wiring screw 42, washer 43, bottom cover 5, positioning bolt 6, insulating sheet 7, second circuit board 8, etc., but the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A compact residual current circuit breaker, characterized in that: The device includes a base, an operating mechanism, and a top cover. The base and the top cover are detachably connected. The operating mechanism is located between the base and the top cover. The operating mechanism includes a trip coil, a test assembly, and a linkage assembly. The linkage assembly includes a bracket, a latch, a jump catch, a U-shaped pin, and a handle. The bracket includes two side plates. The jump catch is located between the two side plates. The handle is rotatably connected to the top of the bracket via a connector. The shafts on both sides of the U-shaped pin pass through the jump catch and the handle, respectively. The base is provided with a first circuit board. The test assembly includes a test button, a test movable piece, and a test conductive element. The circuit board is provided with a first mounting hole for mounting the test movable piece and a second mounting hole for mounting the test conductive element. The test button and the test conductive element are arranged vertically. The test movable piece includes a movable part disposed between the test button and the test conductive element, a plug-in part connected to a mounting slot, and a connecting part for connecting the movable part and the plug-in part. The connecting part and the movable part are arranged in an inverted L-shape. The trip coil is connected to the circuit board.

2. The compact residual current circuit breaker according to claim 1, characterized in that: The longitudinal section of the test conductive component is T-shaped. The test conductive component has two or more mounting protrusions at one end corresponding to the first circuit board. The mounting protrusions are adapted to the second mounting holes and are arranged vertically.

3. The compact residual current circuit breaker according to claim 1, characterized in that: The trip coil consists of a mounting base, a coil, and a moving iron core. The mounting base includes a mounting part connected to the circuit board, a mounting shaft for mounting the coil, and a limiting part located at the other end of the mounting shaft opposite to the mounting part. The limiting part is provided with a mounting through hole adapted to the moving iron core. The mounting shaft is hollow and has a movable channel that communicates with the mounting through hole. One end of the moving iron core passes through the mounting through hole and is located in the movable channel, while the other end is provided with a linkage part for driving the latch to move.

4. A compact residual current circuit breaker according to claim 1, characterized in that: The base has receiving grooves on both sides, and wiring assemblies for connecting wires are installed in the receiving grooves. The wiring assembly includes a conductive plate, a wiring screw, and a washer. The conductive plate includes a first connecting segment, a second connecting segment, and a third connecting segment connected in a Z-shape. The first connecting segment has a connecting hole adapted to the wiring screw. The washer is disposed between the first connecting segment and the wiring screw. The third connecting segment has a stationary contact. The linkage assembly also includes movable contact plates disposed on both sides of the bracket and linked with the jumper. The movable contact plate includes a connecting end fixed to the base by a screw and a movable end that cooperates with the stationary contact. The movable end is disposed above the stationary contact and has a movable contact that cooperates with the stationary contact.

5. A compact residual current circuit breaker according to claim 4, characterized in that: The base has a bottom on the other side opposite to the top cover. The bottom of the base has a receiving groove for installing the second circuit board below the position of the linkage component. The third connecting segment has a fourth connecting segment connected to the second circuit board at the other end opposite to the second connecting segment. The base has a connecting through hole connected to the receiving groove at the position of the fourth connecting segment.

6. A compact residual current circuit breaker according to claim 5, characterized in that: The base has a bottom cover for shielding the receiving groove, and an assembly cavity for receiving the bottom cover. The bottom wall of the assembly cavity has screw holes for fixing the bottom cover. The receiving groove is located inside the assembly cavity and communicates with the assembly cavity. The depth of the assembly cavity is adapted to the bottom cover. The assembly cavity has a positioning bolt for fixing the first connecting section at the position of the first connecting section. The base has an assembly hole at the position of the positioning bolt, and the assembly hole is located between the connecting hole and the second connecting section.

7. A compact residual current circuit breaker according to claim 5, characterized in that: An insulating sheet is provided between the second circuit board and the bottom wall of the receiving tank.

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