Leakage protection device

Abstract

The utility model discloses an electric leakage protection device, which comprises a shell, an electric leakage protection mechanism arranged in the shell and a pair of pins extending out of the shell, and the electric leakage protection mechanism comprises a mounting seat, a circuit board, an automatic circuit breaking device and an induction device, and the circuit board, the automatic circuit breaking device and the induction device are connected onto the mounting seat. The automatic circuit breaking device is provided with a first pin capable of being electrically connected with the circuit board, the induction device comprises a coil shell and a mutual induction coil arranged in the coil shell, the coil shell and the installation base are integrally formed, and the mutual induction coil is provided with a second pin electrically connected with the circuit board. The induction device comprises a coil shell and a mutual inductance coil arranged in the coil shell, the coil shell and the installation base are integrally formed, the mutual inductance coil is provided with a second pin electrically connected with the circuit board, and the mutual inductance coil of the electric leakage protection device is installed in the coil shell before leaving a factory. The automatic circuit breaking device is installed on the installation seat, then is connected with the circuit board, and then is installed in the housing, thereby completing the assembly, enabling the assembly to be very convenient and rapid, and improving the production efficiency of a product.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage protection, in particular to a leakage protection device. Background Art

[0002] In modern society, the wide application of electricity has greatly promoted the development of science and technology and industry, but at the same time, it has also brought electrical safety problems. Especially in residential, commercial buildings and industrial facilities, fires and electric shock accidents caused by electrical faults occur frequently, posing a serious threat to people's lives and property safety. Therefore, as a key electrical safety technology, leakage protection devices are widely used in various electrical systems to prevent and reduce accidents caused by leakage.

[0003] A leakage protection device is a device that can automatically cut off the power supply before the leakage current reaches the current that can harm the human body when the connected electrical appliance leaks electricity, thus protecting personal safety. Some existing leakage protection devices generally have the automatic circuit breaker device and the induction device as separate components. When assembling, it is necessary to first connect the automatic circuit breaker device to the circuit board, and then connect the induction device to the circuit board, which takes a long time for installation and the production and assembly efficiency is not high.

[0004] The present utility model is made based on the above situation. Summary of the Utility Model

[0005] The utility model overcomes the deficiencies of the prior art and provides a leakage protection device that can be quickly assembled and improve the production efficiency of products.

[0006] The present utility model is achieved through the following technical solutions:

[0007] A leakage protection device includes a housing, a leakage protection mechanism disposed inside the housing, and a pair of pins extending from the housing. The leakage protection mechanism includes a mounting base, a circuit board, an automatic circuit breaker device, and an induction device connected to the mounting base. The automatic circuit breaker device is provided with a first pin capable of being electrically connected to the circuit board. The induction device includes a coil housing and a mutual inductance coil disposed inside the coil housing. The coil housing is integrally formed with the mounting base. The mutual inductance coil is provided with a second pin electrically connected to the circuit board.

[0008] As described above, in a leakage protection device, the mounting base includes a lower mounting base and an upper mounting base detachably connected to the lower mounting base. The pins are connected to the lower mounting base. The circuit board, the automatic circuit breaker device, and the induction device are all connected to the upper mounting base. The coil housing is integrally formed with the upper mounting base.

[0009] A leakage protection device as described above, wherein the automatic circuit breaker device includes a pair of elastic pieces connected to the upper mounting seat and a driving assembly capable of actuating the pair of elastic pieces; the driving assembly includes an electromagnetic coil, a crossbar, a pulling structure capable of pulling the crossbar, and a power member capable of extending out of the electromagnetic coil. The pulling structure includes a pulling frame and a pull rod capable of pulling the pulling frame. A linkage structure capable of driving the crossbar to move is provided on the pulling frame. A clamping structure is provided between the pull rod and the pulling frame to enable the two to be clamped so that the pulling frame follows the movement of the pull rod. A connection structure for connecting the power member to the pulling frame is provided between the power member and the pulling frame. A first return spring for resetting the power member is provided in the electromagnetic coil, and a second return spring for resetting the pulling structure is provided between the pulling structure and the lower mounting seat.

[0010] A leakage protection device as described above, wherein the linkage structure includes a supporting block provided at the lower part of the pulling frame and capable of extending below the crossbar.

[0011] A leakage protection device as described above, wherein a clamping groove capable of cooperating with the supporting block is provided at the lower part of the crossbar.

[0012] A leakage protection device as described above, wherein the clamping structure includes a first clamping block provided on the pull rod and a second clamping block provided on the pulling frame and capable of being clamped with the first clamping block. A first inclined surface capable of pushing the pulling frame towards the electromagnetic coil when the pull rod moves downwards is provided at the lower part of the first clamping block.

[0013] A leakage protection device as described above, wherein the connection structure includes a clamping groove provided on the pulling frame and a third clamping block provided on the power member and capable of extending into the clamping groove to be clamped with it.

[0014] A leakage protection device as described above, wherein a moving contact capable of abutting against the pin is provided at the front part of the elastic piece, and the rear part of the elastic piece passes through the sensing device and can be electrically connected to the load electrical appliance and the first pin.

[0015] A leakage protection device as described above, wherein a guiding block for guiding the movement of the pull rod is provided on the lower mounting seat, a guiding groove cooperating with the guiding block is provided on the pull rod, a limiting hole for installing the second return spring is provided on the lower mounting seat, and a limiting post for clamping with the second return spring is provided on the pull rod.

[0016] A leakage protection device as described above, wherein the leakage protection device further includes a reset button connected to the upper part of the pull rod and extending out of the housing. The leakage protection device further includes a test circuit button and a test circuit indicator light.

[0017] Compared with the prior art, the present utility model has the following advantages:

[0018] 1. The induction device includes a coil housing and a mutual inductance coil disposed within the coil housing. The coil housing is integrally formed with the mounting base. The mutual inductance coil is provided with a second pin electrically connected to the circuit board. Before leaving the factory, the mutual inductance coil of the leakage protection device is installed into the coil housing. During assembly, the automatic circuit breaker device is installed on the mounting base and then connected to the circuit board, and then installed in the housing to complete the assembly, which is very convenient and fast, and improves the production efficiency of the product.

[0019] 2. When a leakage occurs in the load device, the electromagnetic coil attracts the power component, causing the cross arm to disengage from the pull rod, causing the elastic piece to leave the pin, and then cutting off the power supply to protect personal safety; when the pull rod is pressed down, the pull rod is clamped with the pulling frame, and the second return spring pushes up the pull rod, pulling up the cross arm to lift the elastic piece, and then the elastic piece abuts against the pin to reconnect the power supply.

[0020] 3. When a leakage occurs in the load device, the current of the elastic piece penetrating into the induction device is unbalanced, and the output end of the induction device will generate a voltage signal proportional to the current to the circuit board. After this voltage signal is amplified and processed by the integrated circuit of the circuit board, the electromagnetic coil is energized to attract the power component, causing the pulling frame to trip, and the elastic piece to disengage from the pin and then cut off the power supply, thereby protecting the safety of the device and personnel.

[0021] 4. The leakage protection device further includes a test circuit button and a test circuit indicator light to confirm whether the leakage protection device has the leakage protection function before using the leakage protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings, where:

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is an exploded schematic diagram of the present invention;

[0025] Figure 3 is a schematic structural diagram of the connection of the automatic circuit breaker device and the induction device on the mounting base in the present invention;

[0026] Figure 4 is an exploded schematic diagram of partial parts in the present invention;

[0027] Figure 5 is an exploded schematic diagram of the automatic circuit breaker device in the present invention;

[0028] Figure 6 is a cross-sectional schematic diagram of the present invention;

[0029] Figure 7 is a schematic structural diagram of the cross arm in the second embodiment of the present invention. Detailed implementation mode

[0030] The present utility model will be further described below with reference to the accompanying drawings:

[0031] As Figures 1 to 7 shown, a leakage protection device includes a housing 1, a leakage protection mechanism disposed within the housing 1, and a pair of pins 2 extending from within the housing 1. The leakage protection mechanism includes a mounting base 3, a circuit board 4, an automatic circuit breaker 5, and an induction device connected to the mounting base 3. The automatic circuit breaker 5 is provided with a first pin 6 capable of being electrically connected to the circuit board 4. The induction device includes a coil housing 71 and a mutual induction coil 72 disposed within the coil housing 71. The coil housing 71 is integrally formed with the mounting base 3. The mutual induction coil 72 is provided with a second pin 73 electrically connected to the circuit board 4.

[0032] In this case, the coil housing 71 is integrally formed with the mounting base 3. Before leaving the factory, the mutual induction coil 72 of the leakage protection device is installed into the coil housing 71. During assembly, the automatic circuit breaker 5 is installed on the mounting base 3 and then connected to the circuit board 4, and then installed in the housing 1 to complete the assembly. The assembly is very convenient and fast, and the production efficiency of the product is improved.

[0033] In some embodiments, the housing 1 includes an upper cover and a base. The upper cover and the base enclose a receiving cavity for placing components. The base is connected to the upper cover by a threaded fastener or other connection means. Among them, the base is provided with an extension hole for the pins 2 to extend.

[0034] In some embodiments, the mounting base 3 includes a lower mounting base 31 and an upper mounting base 32 detachably connected to the lower mounting base 31. The pins 2 are connected to the lower mounting base 31. The circuit board 4, the automatic circuit breaker 5, and the induction device are all connected to the upper mounting base 32. The coil housing 71 is integrally formed with the upper mounting base 32. The lower mounting base 31 and the upper mounting base 32 are separately processed, which is more convenient for the installation of the automatic circuit breaker.

[0035] In some embodiments, the circuit board 4 is fixed to the upper mounting base 32 by a threaded fastener or other connection structures such as a buckle, so as to prevent the circuit board 4 from loosening during the shaking of the leakage protection device and affecting the leakage protection function.

[0036] In some embodiments, the automatic circuit breaker 5 includes a pair of elastic pieces 51 connected to the upper mounting base 32 and a driving assembly capable of actuating the pair of elastic pieces 51; the driving assembly includes an electromagnetic coil 52, a crossbar 53, a pulling structure capable of pulling the crossbar 53, and a power member 54 capable of extending out of the electromagnetic coil 52. The pulling structure includes a pulling frame 55 and a pull rod 56 capable of pulling the pulling frame 55. A linkage structure capable of driving the crossbar 53 to move is provided on the pulling frame 55. A clamping structure is provided between the pull rod 56 and the pulling frame 55 to enable the two to be clamped so that the pulling frame 55 follows the movement of the pull rod 56. A connecting structure connecting the power member 54 to the pulling frame 55 is provided between the power member 54 and the pulling frame 55. A first return spring 57 for resetting the power member 54 is provided in the electromagnetic coil 52. A second return spring 58 for resetting the pulling structure is provided between the pulling structure and the lower mounting base 31. The electromagnetic coil 52 is provided with a third pin for electrically connecting it to the circuit board 4.

[0037] When the load device leaks electricity, the electromagnetic coil 52 attracts the power member 54, so that the crossbar 53 disengages from the pull rod 56, so that the elastic piece 51 leaves the pin 2, and then the power supply is cut off to protect personal safety; when the pull rod 56 is pressed down, the pull rod 56 is clamped with the pulling frame 55, and the second return spring 58 pushes up the pull rod 56, thereby pulling up the crossbar 53 to lift the elastic piece 51, and then the elastic piece 51 abuts against the pin 2 to reconnect the power supply.

[0038] Specifically, the linkage structure includes a support block 551 provided at the lower part of the pulling frame 55 and capable of extending below the crossbar 53. When the pulling frame 55 moves upward, the support block 551 lifts the crossbar 53, and then the elastic piece 51 is connected to the pin 2.

[0039] Further, a card slot 531 is provided at the lower part of the crossbar 53 and capable of cooperating with the support block 551. Further, the crossbar 53 can move more smoothly when moving. Among them, the upper surface of the support block 551 is an arc surface, and the lower surface of the card slot 531 is an arc surface matching it.

[0040] Further, a first limit groove 5311 for restricting the lateral displacement of the pulling frame 55 is provided on the crossbar 53, and a lifting block 5312 for lifting the pulling frame 55 to restrict its downward movement amount is provided on the first limit groove 5311.

[0041] In some embodiments, the snap connection structure includes a first snap block 561 provided on the pull rod 56 and a second snap block 552 provided on the pull frame 55 and capable of snapping with the first snap block 561. A first inclined surface 562 is provided at the lower part of the first snap block 561, which can push the pull frame 55 towards the electromagnetic coil 52 when the pull rod 56 moves downward. Among them, the first snap block 561 and the pull rod 56 are integrally formed, and the second snap block 552 and the pull frame 55 are integrally formed. A guide block 310 for guiding the movement of the pull rod 56 is provided on the lower mounting base 31, and a guide groove 560 cooperating with the guide block 310 is provided on the pull rod 56. A limit hole 580 for mounting the second return spring 58 is provided on the lower mounting base 31. A limit post 581 for snapping with the second return spring 58 is provided on the pull rod 56.

[0042] Further, a second inclined surface opposite to the first inclined surface 562 is provided on the upper surface of the second snap block 552, so as to reduce stress concentration during movement and increase service life.

[0043] In some embodiments, the connection structure includes a card slot 553 provided on the pull frame 55 and a third snap block 541 provided on the power member 54 and capable of extending into the card slot 553 to snap with it. Among them, the third snap block 541 and the power member 54 are integrally formed, and the power member 54 is an armature.

[0044] A moving contact 511 capable of abutting against the pin 2 is provided at the front part of the elastic sheet 51. The rear part of the elastic sheet 51 passes through the sensing device and can be electrically connected to the load electrical appliance and the first pin 6. When the load device leaks electricity, the current of the elastic sheet 51 penetrating into the sensing device is unbalanced, and the output end of the sensing device will generate a voltage signal proportional to the current to the circuit board 4. After this voltage signal is amplified and processed by the integrated circuit of the circuit board 4, the electromagnetic coil 52 is energized to attract the power member 54, so that the pull frame 55 is tripped, and the elastic sheet 51 is separated from the pin 2 and then the power supply is disconnected, thereby protecting the safety of the device and the person.

[0045] In some embodiments, first limit blocks 532 for restricting the lateral movement of the cross arm 53 are provided on the left and right parts of the cross arm 53. The first limit blocks 532 are integrally formed with the cross arm 53 or connected to the cross arm 53 by other connection means such as threaded fasteners.

[0046] In some embodiments, a limiting structure for restricting the moving contact 511 from deviating from the static contact on the pin 2 is provided on the left and right parts of the cross arm 53. The limiting structure includes second limit blocks 533 connected to the left and right parts of the cross arm 53. The second limit blocks 533 are located inside the two elastic sheets 51. The second limit blocks 533 are integrally formed with the cross arm 53 or connected to the cross arm 53 by other connection means such as threaded fasteners.

[0047] Further, the limiting structure further includes third limiting blocks 534 connected to the left and right ends of the cross arm 53. A second limiting groove 535 is formed between the third limiting blocks 534 and the second limiting blocks 533 for limiting the deviation of the moving contact 511 from the static contact on the pin 2. The third limiting blocks 534 are integrally formed with the cross arm 53 or connected to the cross arm 53 by other connection means such as threaded fasteners.

[0048] The leakage protection device further includes a reset button 8 connected to the upper part of the pull rod 56 and extending out of the housing 1. The leakage protection device further includes a test circuit button 91 and a test circuit indicator light 92 to confirm whether the leakage protection device has the leakage protection function before using the leakage protection device.

[0049] In some embodiments, a ground wire pin 20 capable of passing through the housing 1 is further provided on the lower mounting base 31.

Claims

1. A leakage protection device, characterized in that: It includes a housing (1), a leakage protection mechanism disposed within the housing (1), and a pair of pins (2) extending from within the housing (1). The leakage protection mechanism includes a mounting base (3), a circuit board (4), an automatic circuit breaker (5), and an induction device connected to the mounting base (3). The automatic circuit breaker (5) is provided with a first pin (6) capable of being electrically connected to the circuit board (4). The induction device includes a coil housing (71) and a mutual inductance coil (72) disposed within the coil housing (71). The coil housing (71) is integrally formed with the mounting base (3). The mutual inductance coil (72) is provided with a second pin (73) electrically connected to the circuit board (4).

2. The leakage protection device according to claim 1, characterized in that: The mounting base (3) includes a lower mounting base (31) and an upper mounting base (32) detachably connected to the lower mounting base (31). The pins (2) are connected to the lower mounting base (31). The circuit board (4), the automatic circuit breaker (5), and the induction device are all connected to the upper mounting base (32). The coil housing (71) is integrally formed with the upper mounting base (32).

3. A leakage protection device according to claim 2, characterized in that: The automatic circuit breaker (5) includes a pair of elastic pieces (51) connected to the upper mounting base (32) and a driving assembly capable of actuating the pair of elastic pieces (51). The driving assembly includes an electromagnetic coil (52), a crossbar (53), a pulling structure capable of pulling the crossbar (53), and a power member (54) capable of extending from within the electromagnetic coil (52). The pulling structure includes a pulling frame (55) and a pull rod (56) capable of pulling the pulling frame (55). The pulling frame (55) is provided with a linkage structure capable of driving the crossbar (53) to move. A clamping structure is provided between the pull rod (56) and the pulling frame (55) to enable the two to be clamped so that the pulling frame (55) follows the movement of the pull rod (56). A connecting structure is provided between the power member (54) and the pulling frame (55) to connect the power member (54) to the pulling frame (55). A first return spring (57) for resetting the power member (54) is provided within the electromagnetic coil (52). A second return spring (58) for resetting the pulling structure is provided between the pulling structure and the lower mounting base (31).

4. The leakage protection device according to claim 3, wherein: The linkage structure includes a support block (551) provided at the lower part of the pulling frame (55) and capable of extending below the crossbar (53).

5. A leakage protection device according to claim 4, characterized in that: A slot (531) capable of cooperating with the support block (551) is provided at the lower part of the crossbar (53).

6. A leakage protection device according to claim 3 or 4, characterized in that: The clamping structure includes a first clamping block (561) provided on the pull rod (56) and a second clamping block (552) provided on the pulling frame (55) and capable of being clamped with the first clamping block (561). A first inclined surface (562) is provided at the lower part of the first clamping block (561) to push the pulling frame (55) towards the electromagnetic coil (52) when the pull rod (56) moves downwards.

7. An electric leakage protection device according to claim 3 or 4, characterized in that: The connecting structure includes a slot (553) provided on the pulling frame (55) and a third clamping block (541) provided on the power member (54) and capable of extending into the slot (553) to be clamped with it.

8. A leakage protection device according to claim 3, characterized in that: The front part of the elastic piece (51) is provided with a moving contact (511) capable of abutting against the pin (2), and the rear part of the elastic piece (51) passes through the sensing device and can be electrically connected to the load electrical appliance and the first pin (6).

9. A leakage protection device according to claim 3, characterized in that: The lower mounting base (31) is provided with a guiding block (310) for guiding the movement of the pull rod (56). The pull rod (56) is provided with a guiding groove (560) cooperating with the guiding block (310). The lower mounting base (31) is provided with a limiting hole (580) for mounting the second return spring (58), and the pull rod (56) is provided with a limiting post (581) clamped with the second return spring (58).

10. A leakage protection device according to claim 3, characterized in that: The leakage protection device further includes a reset button (8) connected to the upper part of the pull rod (56) and extending out of the housing (1). The leakage protection device further includes a test circuit button (91) and a test circuit indicator light (92).

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