Circuit integrated leakage protection switch

Abstract

The utility model discloses a circuit integrated leakage protection switch, which belongs to the technical field of leakage protection switches, solves the technical problem that the existing leakage protection switch is large in size and inconvenient in wiring, and comprises a base and a top cover, a first terminal and a second terminal are arranged on the base, a main control board is arranged in the base, and a mutual inductor is fixedly arranged on the main control board. The first terminal is electrically connected with the main control board through the first conducting strip, the main control board is electrically connected with a second conducting strip, the second terminal is electrically connected with a third conducting strip, and one end of the second conducting strip and one end of the third conducting strip are arranged in a vertically spaced mode and serve as contact ends. And the main control board is provided with a tripping mechanism for driving one end of the second conducting strip to be in contact with one end of the third conducting strip. The mutual inductor and the tripping mechanism are installed on the main control board, the U-shaped conductive frame of the mutual inductor can be directly connected with a live wire and a zero wire, the threading mode of a traditional leakage protection switch is avoided, and the leakage protection switch is compact in overall structure, small in size and convenient to assemble and wire.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage protection switches, and more specifically, to a circuit-integrated leakage protection switch. Background Art

[0002] The leakage protection switch is mainly used to protect against leakage faults in equipment and to protect people from fatal electric shock. It has overload and short-circuit protection functions and can be used to protect lines or motors from overload and short circuit.

[0003] In traditional leakage protection switches, the main circuit passes through the transformer with wires, and the live wire L and the neutral wire N pass through the transformer at the same time and then connect to the terminal. The threading method of traditional leakage protection switches takes up a lot of space, the overall structure is not compact enough, and it is inconvenient to assemble. Utility Model Content

[0004] The technical problem to be solved by the utility model is to address the above-mentioned deficiencies in the prior art, and the purpose of the utility model is to provide a circuit-integrated leakage protection switch.

[0005] The technical solution of the utility model is: a circuit-integrated leakage protection switch, comprising a base and a top cover covering the base, wherein two ends of the base are respectively provided with a first terminal and a second terminal, a main control board is provided in the base, a mutual inductor is fixedly provided on the main control board, the first terminal is electrically connected to the main control board through a first conductive sheet, the main control board is electrically connected to a second conductive sheet, the second terminal is electrically connected to a third conductive sheet, one end of the second conductive sheet and one end of the third conductive sheet are arranged with an upper and lower interval and serve as contact ends, and a tripping mechanism for driving one end of the second conductive sheet to contact one end of the third conductive sheet is provided on the top of the main control board.

[0006] As a further improvement, the tripping mechanism includes a mounting frame, the top of the mounting frame is rotatably connected to a handle via a rotating shaft, the outer sleeve of the rotating shaft is provided with a torsion spring, one side of the handle is rotatably connected to a pull rod, the lower end of the pull rod is rotatably connected to a first slider, a first slide groove for slidably mounting the first slider is provided in the mounting frame, a second slide groove is provided at the bottom of the first slide groove, a second slider is slidably mounted in the second slide groove, a yield groove corresponding to the first slider is provided on one side of the second slider, a pressure rod of a cylindrical structure and a slidably connected electromagnetic actuator are provided on the other side of the second slider, a contact portion for contacting the bottom edge of the first slider is provided on the side of the yield groove close to the pressure rod, one end of the second conductive sheet and one end of the third conductive sheet are both located below the pressure rod, and the mounting frame is provided with a third slide groove for guiding the pressure rod to move up and down.

[0007] Furthermore, the second sliding block is provided with a fourth sliding groove, the extended end of the electromagnetic actuator passes through the fourth sliding groove and is provided with a limit baffle, and the width of the limit baffle is greater than the width of the fourth sliding groove.

[0008] Furthermore, a compression spring is provided at the bottom of the second sliding block.

[0009] Furthermore, the mutual inductor includes a shell, a positioning cylinder is provided in the shell, the gap between the shell and the positioning cylinder is an installation cavity, an induction coil is provided in the installation cavity, the induction coil is sleeved on the periphery of the positioning cylinder, U-shaped conductive frames are fixedly provided on both sides of one end of the shell, the two ends of the U-shaped conductive frame are respectively buckled on the inner and outer sides of the induction coil, and the two ends of the U-shaped conductive frame protrude from the end surface of the shell and serve as wiring pins, signal columns are fixedly provided on both sides of the other end of the shell, the extension direction of the signal columns is the same as the extension direction of the wiring pins, the two signal columns are respectively electrically connected to the two ends of the induction coil, and the main control board is respectively provided with mounting holes for electrically connecting the wiring pins and the signal columns.

[0010] Beneficial Effects

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The mutual inductor and the tripping mechanism of the utility model are installed on the main control board, and the U-shaped conductive frame of the mutual inductor can directly connect the live wire and the neutral wire, avoiding the threading method of the traditional leakage protection switch. The leakage protection switch of the utility model has a compact overall structure, a small size, and is easy to assemble and wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the main structure of the main control board in the utility model, where a mutual inductor and a tripping mechanism are installed;

[0016] Figure 4 This is a three-dimensional structural diagram of the main control board in the utility model with the transformer and the tripping mechanism installed;

[0017] Figure 5 It is a structural schematic diagram of the torsion spring in the utility model;

[0018] Figure 6 It is a cross-sectional view of the tripping mechanism in the utility model;

[0019] Figure 7It is a three-dimensional structural schematic diagram of the tripping mechanism in the utility model;

[0020] Figure 8 It is a bottom schematic diagram of the tripping mechanism in the utility model;

[0021] Fig. 9 It is a structural schematic diagram of the first slider and the second slider in the utility model;

[0022] Fig.10 This is a schematic diagram of the main structure of the mounting frame in the utility model;

[0023] Fig.11 It is a cross-sectional view of the mounting frame in the utility model;

[0024] Fig.12 It is a three-dimensional structural schematic diagram of the mounting frame in the utility model;

[0025] Fig.13 This is a schematic diagram of the bottom structure of the mounting frame in the utility model;

[0026] Fig.14 It is an exploded diagram of the mutual inductor in the utility model;

[0027] Fig.15 This is a schematic diagram of the main structure of the mutual inductor in the utility model;

[0028] Fig.16 It is a schematic diagram of the top structure of the mutual inductor in the utility model;

[0029] Fig.17 It is a schematic diagram of the bottom structure of the mutual inductor in the utility model;

[0030] Fig.18 It is a structural schematic diagram of the shell of the mutual inductor in the utility model.

[0031] Among them: 1-base, 2-top cover, 3-first terminal, 4-second terminal, 5-main control board, 6-transformer, 7-first conductive sheet, 8-second conductive sheet, 9-third conductive sheet, 10-mounting frame, 11-rotating shaft, 12-handle, 13-torsion spring, 14-pull rod, 15-first slider, 16-first slide slot, 17-second slide slot, 18-second slider, 19-giving slot, 20-pressure rod, 21-electromagnetic actuator, 22-contact Part, 23-third slide groove, 24-fourth slide groove, 25-extending end, 26-limit baffle, 27-compression spring, 28-housing, 29-positioning cylinder, 30-installation cavity, 31-induction coil, 32-U-shaped conductive frame, 33-wiring pin, 34-signal column, 35-operating part, 36-test button, 37-adjusting boss, 38-insulating material, 39-external boss, 40-inner boss, 41-through hole, 42-signal column installation groove. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0033] See also Figures 1 to 18 A circuit-integrated leakage protection switch comprises a base 1 and a top cover 2 covering the base 1, a first terminal 3 and a second terminal 4 are respectively provided at two ends of the base 1, a main control board 5 is provided in the base 1, a mutual inductor 6 is fixedly provided on the main control board 5, the first terminal 3 is electrically connected to the main control board 5 through a first conductive sheet 7, the main control board 5 is electrically connected to a second conductive sheet 8, the second terminal 4 is electrically connected to a third conductive sheet 9, one end of the second conductive sheet 8 and one end of the third conductive sheet 9 are arranged with an upper and lower interval and serve as contact ends, and a tripping mechanism for driving one end of the second conductive sheet 8 to contact one end of the third conductive sheet 9 is provided on the top of the main control board 5.

[0034] The specific tripping mechanism includes a mounting frame 10, the top of the mounting frame 10 is rotatably connected to a handle 12 through a rotating shaft 11, and a torsion spring 13 is sleeved on the outer periphery of the rotating shaft 11. The side wall of the handle 12 is provided with at least two adjustment bosses 37 for adjusting the torsion spring 13, one end of the torsion spring 13 is clamped on the adjustment boss 37, and the other end is clamped on the top cover 2. One end of the torsion spring 13 can be clamped on the adjustment boss 37 at the corresponding position according to the actual elastic force required by the torsion spring 13, and the adjustment is convenient and simple. A pull rod 14 is rotatably connected to one side of the handle 12, and a first slider 15 is rotatably connected to the lower end of the pull rod 14. A first slide groove 16 for slidably installing the first slider 15 is provided in the mounting frame 10, a second slide groove 17 is provided at the bottom of the first slide groove 16, a second slider 18 is slidably installed in the second slide groove 17, one side of the second slider 18 is provided with a yield groove 19 corresponding to the first slider 15, the other side of the second slider 18 is provided with a cylindrical pressure rod 20 and a slidably connected electromagnetic actuator 21, the yield groove 19 is provided with a contact portion 22 for contacting the bottom edge of the first slider 15 on the side close to the pressure rod 20, one end of the second conductive sheet 8 and one end of the third conductive sheet 9 are both located below the pressure rod 20, and the mounting frame 10 is provided with a third slide groove 23 for guiding the pressure rod 20 to move up and down.

[0035] The second sliding block 18 is provided with a fourth sliding slot 24 . The extended end 25 of the electromagnetic actuator 21 passes through the fourth sliding slot 24 and is provided with a limit baffle 26 . The width of the limit baffle 26 is greater than the width of the fourth sliding slot 24 .

[0036] A compression spring 27 is provided at the bottom of the second slider 18 for lifting the second slider 18 when the circuit breaker trips.

[0037] During actual operation, the handle 12 is pressed, and the first slider 15 moves downward along the first slide groove 16 and contacts the contact portion 22. The first slider 15 pushes the second slider 18 downward, so that the pressure rod 20 moves downward to press the third conductive sheet 9 down to contact and conduct with the second conductive sheet 8. When the mutual inductor 6 detects leakage or excessive current, the main control board 5 controls the electromagnetic actuator 21 to operate, and the electromagnetic actuator 21 pulls the second slider 18 backward to rotate. At this time, the edge of the first slider 15 is offset from the contact portion 22, and automatic tripping is achieved under the action of the torsion spring 13.

[0038] The mutual inductor 6 includes a shell 28, a positioning cylinder 29 is provided in the shell 28, and the gap between the shell 28 and the positioning cylinder 29 is an installation cavity 30. An induction coil 31 is provided in the installation cavity 30, and the induction coil 31 is sleeved on the periphery of the positioning cylinder 29. U-shaped conductive frames 32 are fixedly provided on both sides of one end of the shell 28, respectively. The U-shaped conductive frames 32 are respectively used to connect the live wire and the neutral wire. The two ends of the U-shaped conductive frame 32 are respectively buckled on the inner and outer sides of the induction coil 31, and the two ends of the U-shaped conductive frame 32 protrude from the end surface of the shell 28 and serve as wiring pins 33 for outputting detection signals. Signal columns 34 are fixedly provided on both sides of the other end of the shell 28, and the extension direction of the signal column 34 is the same as the extension direction of the wiring pin 33. The two signal columns 34 are respectively electrically connected to the two ends of the induction coil 31. The main control board 5 is respectively provided with mounting holes for electrically connecting the wiring pins 33 and the signal column 34. The wiring pins 33 and the signal column 34 are inserted into the mounting holes and then welded.

[0039] Specifically, outer bosses 39 are respectively provided on both sides of one end of the housing 28, and inner bosses 40 corresponding to the two outer bosses 39 are respectively provided on the inner wall of the positioning cylinder 29, and both the outer bosses 39 and the inner bosses 40 are provided with through holes 41, and one end of the U-shaped conductive frame 32 passes through the through hole 41 of the outer boss 39 on one side, and the other end passes through the through hole 41 of the inner boss 40 corresponding to the outer boss 39. Preferably, the two ends of the U-shaped conductive frame 32 are interference fit with the through holes 41.

[0040] The other end of the housing 28 is provided with a signal column installation slot 42, which is connected to the installation cavity 30, and two signal columns 34 are respectively installed on both sides of the signal column installation slot 42. Preferably, the signal column 34 and the signal column installation hole in the signal column installation slot 13 are interference fit.

[0041] The opening end of the installation cavity 30 is provided with an insulating material 38 covering the induction coil 31, the U-shaped conductive frame 32, and the signal column 34. Preferably, the insulating material 38 is epoxy resin potting filling glue to protect the induction coil 31, the U-shaped conductive frame 32, and the signal column 34.

[0042] The main control panel 5 is further provided with a test button 36 , and an operating portion 35 of the test button 36 passes through the top cover 2 .

[0043] The utility model installs the mutual inductor 6 and the tripping mechanism on the main control board 5, and the U-shaped conductive frame 32 of the mutual inductor 6 can directly connect the live wire and the neutral wire, thereby avoiding the threading method of the traditional leakage protection switch. The leakage protection switch of the utility model has a compact overall structure, a small size, and is easy to assemble and wire.

[0044] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A circuit-integrated leakage protection switch, comprising a base (1) and a top cover (2) covering the base (1), wherein two ends of the base (1) are respectively provided with a first terminal (3) and a second terminal (4), and a main control board (5) is provided inside the base (1), characterized in that: The main control board (5) is fixedly provided with a mutual inductor (6); the first terminal (3) is electrically connected to the main control board (5) via a first conductive sheet (7); the main control board (5) is electrically connected to a second conductive sheet (8); the second terminal (4) is electrically connected to a third conductive sheet (9); one end of the second conductive sheet (8) and one end of the third conductive sheet (9) are arranged with an upper and lower spacing and serve as contact ends; and a tripping mechanism for driving one end of the second conductive sheet (8) to contact one end of the third conductive sheet (9) is provided on the top of the main control board (5).

2. The circuit-integrated leakage protection switch according to claim 1, characterized in that: The tripping mechanism comprises a mounting frame (10), the top of the mounting frame (10) is rotatably connected to a handle (12) via a rotating shaft (11), the outer periphery of the rotating shaft (11) is provided with a torsion spring (13), one side of the handle (12) is rotatably connected to a pull rod (14), the lower end of the pull rod (14) is rotatably connected to a first slider (15), a first slide groove (16) for slidably mounting the first slider (15) is provided in the mounting frame (10), a second slide groove (17) is provided at the bottom of the first slide groove (16), a second slider (18) is slidably mounted in the second slide groove (17), and the second slider (18) is slidably mounted in the second slide groove (17). A clearance groove (19) corresponding to the first slider (15) is provided on one side of the block (18), and a pressure rod (20) of a cylindrical structure and an electromagnetic actuator (21) in sliding connection are provided on the other side of the second slider (18). A contact portion (22) for contacting the bottom edge of the first slider (15) is provided on the side of the clearance groove (19) close to the pressure rod (20). One end of the second conductive sheet (8) and one end of the third conductive sheet (9) are both located below the pressure rod (20), and the mounting frame (10) is provided with a third sliding groove (23) for guiding the pressure rod (20) to move up and down.

3. The circuit-integrated leakage protection switch according to claim 2, characterized in that: The second sliding block (18) is provided with a fourth sliding groove (24), the protruding end (25) of the electromagnetic actuator (21) passes through the fourth sliding groove (24) and is provided with a limit baffle (26), and the width of the limit baffle (26) is greater than the width of the fourth sliding groove (24).

4. The circuit-integrated leakage protection switch according to claim 2, characterized in that: A compression spring (27) is provided at the bottom of the second sliding block (18).

5. A circuit-integrated leakage protection switch according to any one of claims 1 to 4, characterized in that: The mutual inductor (6) comprises a shell (28), a positioning cylinder (29) is arranged in the shell (28), a gap between the shell (28) and the positioning cylinder (29) is a mounting cavity (30), an induction coil (31) is arranged in the mounting cavity (30), the induction coil (31) is sleeved on the periphery of the positioning cylinder (29), a U-shaped conductive frame (32) is fixedly arranged on both sides of one end of the shell (28), and the two ends of the U-shaped conductive frame (32) are respectively buckled on the inner and outer sides of the induction coil (31). On both sides, the two ends of the U-shaped conductive frame (32) protrude from the end surface of the shell (28) and serve as wiring pins (33), and signal columns (34) are fixedly provided on both sides of the other end of the shell (28), and the extension direction of the signal column (34) is the same as the extension direction of the wiring pin (33), and the two signal columns (34) are electrically connected to the two ends of the induction coil (31), respectively, and the main control board (5) is respectively provided with mounting holes for electrically connecting the wiring pins (33) and the signal columns (34).

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