CN219394416U - Leakage protector - Google Patents

Abstract

The present disclosure provides an earth leakage protection device. The electric leakage protection device comprises a shell and a core assembly arranged in the shell, wherein the core assembly comprises a control circuit board, an input assembly, an output assembly, a reset assembly and a tripping assembly, and the input assembly and the output assembly are coupled with the control circuit board; the leakage protection device further comprises a safety component which is connected with the input component in series and comprises a fuse and a fuse connecting piece. The safety assembly improves the safety performance of the leakage protection device, improves the internal structure and layout of the product, optimizes the assembly of the product while guaranteeing the use safety of the product, improves the production and processing efficiency and reduces the cost. In addition, the leakage protection device is simple in structure, convenient to assemble and favorable for realizing automatic production of products.

Description

Leakage protector

Technical Field

The present disclosure relates generally to the field of earth leakage protection devices, and more particularly to an earth leakage protection device with a safety function and an automatic trip function when power is off.

Background

Conventional earth leakage protection devices, such as earth leakage protection sockets or plugs, are generally complex in structure, difficult to assemble, and high in manual assembly cost. Along with the increasing wide application scenes, the existing leakage protection device is limited by principles and structures, and reasonable layout distribution and effective implementation of performance of each functional component often have influence on the overall appearance, size and the like of the product. In addition, manufacturers and consumers also desire to further enhance the safety and applicability of the earth leakage protection devices.

Disclosure of Invention

The present disclosure is directed to an improved leakage protection device in the prior art, and provides a leakage protection device capable of further improving safety performance and automatically tripping when power is off, and simplifying assembly of a product and optimizing appearance and size of the product by improving a component structure.

To this end, according to the present disclosure, there is provided a leakage protection device including a housing and a core assembly disposed within the housing, the core assembly including a control circuit board, an input assembly, an output assembly, and a reset assembly, a trip assembly coupled with the control circuit board; the leakage protection device further comprises a safety component which is connected with the input component in series and comprises a fuse and a fuse connecting piece.

The present disclosure may further include any one or more of the following optional forms according to the above technical idea.

In some alternative forms, the input assembly includes a pair of input tabs disposed on either side of the housing and connected to corresponding tabs and the control circuit board, respectively, wherein the tabs are integrally secured to the housing.

In some alternatives, the input assembly further comprises a ground connection wire having one end connected to a ground tab and the other end soldered to a ground output via a ground soldering hole on the control circuit board.

In some alternatives, the fuse is sandwiched between two fuse clips, the pair of input clips includes a neutral input clip and a hot input clip, and the blade includes a neutral blade and a hot blade; one end of the fuse connecting piece is connected to the fire wire inserting piece, the other end of the fuse connecting piece is connected with one fuse clamping piece, and the fire wire input piece is connected to the other fuse clamping piece.

In some alternatives, the output assembly includes a pair of spring contact arms, each spring contact arm provided with an electrical contact, the spring contact arms and corresponding output terminals being respectively coupled to the control circuit board.

In some alternatives, the control circuit board is provided with electrostatic contacts to mate with the electrokinetic contacts.

In some alternative forms, the trip assembly comprises a trip coil, a trip iron core and a trip unit, wherein the elastic contact arm is suitable for sliding into a sliding groove arranged on the trip unit, a clamping tongue is arranged at the sliding end of the elastic contact arm, and the clamping tongue is suitable for being clamped with a positioning opening in the sliding groove after the elastic contact arm slides in place.

In some optional forms, the reset assembly comprises a reset button protruding out of the shell, a reset piece connected with the reset button through a reset button, and a reset spring sleeved on the reset piece; the reset button is provided with a clamping claw to be fixed with a clamping groove in the reset button, and the reset piece is provided with a hanging hole to be sleeved on a hanging arm arranged on the reset button.

In some alternative forms, the reset piece is suitable for passing through a bayonet arranged on the release and is provided with a reset hook which is bent obliquely, and the reset hook is provided with a U-shaped clamping groove to be matched with the release iron core.

In some alternative forms, the end of the reset hook is provided with an arc-shaped bend, and the bend is matched with a reset inclined plane in the shell so as to reset the leakage protection device.

In some alternative forms, the leakage protection device comprises a test assembly, wherein the test assembly comprises a test button protruding out of the shell, a test sheet connected with the test button, and a test spring sleeved on the test sheet; the test piece is provided with a clamping claw to be fixed with a clamping groove in the test button, the test piece is also provided with a pair of elastic arms integrated with the clamping claw, and the test assembly can be switched between a conducting state contacting the control circuit board and a disconnecting state separating from the control circuit board through the elastic arms.

In some alternative forms, the test button is provided with a limit rib, and in the on state, the limit rib abuts against the control circuit board to limit excessive deformation of the elastic arm.

The safety assembly improves the safety performance of the leakage protection device, improves the internal structure and layout of the product, optimizes the assembly of the product while guaranteeing the use safety of the product, improves the production and processing efficiency and reduces the cost. In addition, the leakage protection device is simple in structure, convenient to assemble and favorable for realizing automatic production of products.

Drawings

Other features and advantages of the present disclosure will be better understood from the following detailed description of alternative embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an external schematic view of a leakage protection device according to one embodiment of the present disclosure;

FIG. 2 is an exploded view of the leakage protection device of FIG. 1;

FIG. 3 is a schematic view of the leakage protection device of FIG. 1 with an upper cover removed;

FIG. 4 is a schematic view of a base assembly of the leakage protection device of FIG. 1;

FIG. 5 is an exploded view of the base assembly of FIG. 4;

FIG. 6 is a schematic diagram of a cartridge assembly of the leakage protection device of FIG. 1;

FIG. 7 is an exploded view of the cartridge assembly of FIG. 6;

FIG. 8 is an exploded view of the trip movable contact arm assembly of FIG. 7;

FIG. 9 is an exploded view of the reset assembly of FIG. 7 with the reset spring removed;

FIG. 10 is an exploded view of the test assembly of FIG. 7;

FIG. 11 is a schematic cross-sectional view of the leakage protection device in a tripped state;

fig. 12 is a schematic cross-sectional view of the earth leakage protection device in a reset button pressed state;

fig. 13 is a schematic cross-sectional view of the earth leakage protection device in a reset state.

Detailed Description

The making and using of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the disclosure, and do not limit the scope of the disclosure. The structural position of the various components as described, such as the directions of up, down, top, bottom, etc., is not absolute, but rather relative. When the individual components are arranged as shown in the figures, these directional expressions are appropriate, but when the position of the individual components in the figures changes, these directional expressions also change accordingly.

In this document, the terms "coupled," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly connected, or indirectly connected through intermediaries. The specific meaning of the terms herein above will be understood by those of ordinary skill in the art as the case may be.

In this context, the earth leakage protection device is exemplified by a plug, it being understood that any remaining earth leakage protection devices, such as sockets, applicable to the concepts of the present disclosure are not excluded.

Referring to fig. 1 to 3, there is shown an earth leakage protection device according to one embodiment of the present disclosure. The leakage protection device comprises a shell, a core assembly arranged in the shell, and a line clip 5 which is connected with the shell and extends out of the shell and is used for connecting a power line. In the embodiment shown, the housing comprises an upper cover 1 and a bottom cover, the bottom cover being provided to comprise a first bottom cover or base 2 and a detachably connected second bottom cover or rear cover 3, wherein the rear cover 3 is arranged corresponding to the rear end of the movement assembly for wiring so that the rear end can be exposed as shown in fig. 3 for connection to a power cord in the assembled state of the earth leakage protection device. In this way, the upper cover and the lower cover of the leakage protection device can be assembled and connected in a convenient manner, and transported and stored separately from the power line, contributing to the reduction of the product volume and the cost. When the power line needs to be connected, the power line can be connected to the core assembly by disassembling the rear cover, so that the motor is convenient and quick. Accordingly, the upper cover 1 and the rear cover 3 are provided with an upper line card bayonet 104 and a lower line card bayonet 301 corresponding to the line card 5, respectively.

In the embodiment shown, the movement assembly comprises a control circuit board 9, and input and output assemblies coupled to the control circuit board 9, and at least a reset assembly and a trip assembly, to enable electrical connection and disconnection of the inputs and outputs. In some embodiments, the earth leakage protection device is further provided with a test assembly and/or a status display mechanism, and correspondingly, the upper cover 1 is provided with a reset button guide hole 101, a test button guide hole 102 and an observation hole 103 for the status display mechanism, where the reset button and the test button respectively protrude.

As shown in connection with fig. 5, the input assembly includes a pair of input pads, namely, a live input pad 201, a neutral input pad 202, which are respectively disposed at both sides within the housing and respectively connected to corresponding plug-in pads and a control circuit board. The inserting pieces comprise a live wire inserting piece 207 and a zero wire inserting piece 208, the head end of each inserting piece extends out of the base 2 of the shell and is used for being inserted into a jack of a corresponding socket to obtain electricity, and the tail end of each inserting piece is provided with a riveting column for riveting a corresponding connecting piece. The input assembly further comprises a ground connection wire 205, one end of the ground connection wire 205 is connected to a rivet post of a ground insert 209, and the other end is fixed in a positioning slot on the base 2 and soldered to the ground output 210 via a ground wire soldering hole 907 (fig. 2) on the control circuit board 9, thereby forming a connection of the whole ground circuit. Advantageously, the live wire insert 207, neutral wire insert 208 and ground insert 209 are directly fixed in one piece with the base when the base 2 is injection molded. As can be seen in fig. 4, the live input pad 201 and the neutral input pad 202 are located on opposite sides of the interior of the chassis 2, respectively, which facilitates wiring on the control circuit board of the engine assembly.

In the illustrated embodiment, the leakage protection device further includes a fuse assembly connected in series with the input assembly and including a fuse and a fuse link. As shown in fig. 5, the fuse 213 is sandwiched between two fuse clips 206, wherein one end of the fuse connecting piece 203 is connected to the live wire inserting piece 207, the other end is connected to one fuse clip 206 by the solid rivet 204, and the live wire input piece 201 is also connected to the other fuse clip 206 by the solid rivet 204. In this way, the safety component plays a role in connection and overload protection of the live wire input circuit, and further improves the safety performance of the leakage protection device. In addition, the base including the input assembly and the safety assembly can be assembled together to form a base assembly, as shown in FIG. 4.

Fig. 6 and 7 show a movement assembly in which the output assembly comprises a pair of resilient contact arms, namely a live wire moving contact arm 20 and a neutral wire moving contact arm 21, each of which is provided with an electrokinetic contact, and which are respectively coupled to a control circuit board with corresponding output terminals. Referring specifically to fig. 5 and 7, the base 2 is provided with a neutral output terminal 211 and a live output terminal 212 at corresponding positions thereof, which are soldered to a neutral output soldering hole 908 and a live output soldering hole 909, respectively, on the control circuit board 9. According to the present disclosure, the control circuit board 9 is provided with electrostatic contacts, as shown in fig. 7, a live wire electrostatic contact 905 and a neutral wire electrostatic contact 906 are soldered at a live wire electrical contact soldering hole 903 and a neutral wire electrical contact soldering hole 904, respectively, on the control circuit board 9, and correspond to a live wire electrical contact 2001 and a neutral wire electrical contact 2101 (fig. 8) on the live wire moving contact arm 20 and the neutral wire moving contact arm 21.

The trip assembly includes a trip coil 18, a trip core 19, and a trip unit 22, and the spring contact arms are adapted to slide into sliding grooves provided on the trip unit 22 in accordance with the present disclosure. As shown in fig. 8, the sliding ends of the live wire moving contact arm 20 and the neutral wire moving contact arm 21 are respectively provided with a clamping tongue 2002, 2102, and the clamping tongues 2002, 2102 are suitable for being clamped with a positioning opening 2202 in a corresponding sliding groove 2201 after the live wire moving contact arm 20 and the neutral wire moving contact arm 21 slide in place, so that the elastic contact arm is limited on the release 22 and a release contact arm assembly is formed.

The reset assembly comprises a reset button 7 protruding out of the shell, a reset piece 12 connected with the reset button 7 through a reset button 11, and a reset spring 13 sleeved on the reset piece 12. In some embodiments, the restoring member 12 may be configured as a sheet as shown. Referring specifically to fig. 9, in the illustrated embodiment, reset button 11 is provided with a snap-in detent 1102 to secure with a snap-in groove (not shown) in reset button 7, a pair of spaced-apart snap-in detents being illustratively shown. The reset element 12 is provided with a hanging hole 1202 to be sleeved on a hanging arm 1101 arranged on the reset button 11 and can freely move.

According to the present disclosure, the reset member 12 is adapted to pass through a bayonet 2203 (fig. 8) provided on the trip unit 22 and is provided with a reset hook 1203 bent obliquely, said reset hook 1203 being provided with a U-shaped slot 1201 to cooperate with the trip core 19. Advantageously, the end of the reset hook 1203 is provided with an arcuate bend 1204, said bend 1204 being able to cooperate with a reset ramp 214 (fig. 4) inside the housing to effect resetting of the earth leakage protection device, as will be described in detail below.

In the illustrated embodiment, the earth leakage protection device further includes a test assembly. Referring to fig. 10, the test assembly includes a test button 8 protruding outside the housing, a test strip 14 connected to the test button 8, and a test spring 15 sleeved on the test strip 14. The test strip 14 is provided with a snap-in jaw 1401 for securing with a snap-in groove (not shown) in the test button 8, a pair of spaced-apart snap-in jaws being shown by way of example. The test strip 14 is further provided with a pair of resilient arms 1402 integral with the engagement claw 1401, advantageously the pair of resilient arms 1402 being outwardly flared in a V-shape, the test assembly being switchable by the resilient arms between an on-state contacting the control circuit board and an off-state leaving the control circuit board.

Advantageously, the test button 8 is provided with a stop rib 801. When the test button 8 is pressed, the elastic arm 1402 on the test piece is in contact with the solder joint on the control circuit board to realize conduction. When the test button is continuously pressed down in the on state, the limiting rib 801 can be abutted with the control circuit board so as to limit the test button to continuously move down, and therefore the service life is prevented from being reduced due to excessive deformation of the elastic arm.

Returning to fig. 7, the movement assembly further includes a magnet ring assembly 16, a coil support 17, and an inner cover 6. The inner cover 6 is disposed between the reset and test assemblies and the control circuit board 9 to support the reset and test assemblies and can play a role in waterproofing. The inner cover 6 is provided with a via hole through which the reset component and the test component pass, specifically, a reset guide hole 601 through which the reset button passes and a test guide hole 602 through which the test button passes. As described above, in the embodiment having the state indicating mechanism, the light guide cap 603 may be provided on the inner cap 6, and the indicator such as the light guide column may display the operation state of the product through the light guide cap 603 and the observation hole 103 on the upper cap 1.

During assembly, one end of the trip iron core 19 is sleeved into an inner hole of the trip coil 18, is arranged in the coil bracket 17 to form a whole, is clamped into a corresponding positioning hole on the control circuit board 9, and can be fixed by means of a clamping hook. Then, the above-described trip contact arm assembly including the trip unit 22 and the elastic contact arm is inserted into the coil bracket 17 to be fixed, and one end of the elastic contact arm connected to the control circuit board is soldered with one end 1601, 1602 of the conductive connecting piece in the magnetic ring assembly 16, respectively. The other ends 1603, 1604 of the conductive tabs in the magnet ring assembly 16 are soldered to the neutral output terminal 211 and the live output terminal 212 on the base 2, thereby completing the connection of the input and output terminals. After that, the reset button 7 of the reset assembly and the test button 8 of the test assembly are mounted in the inner cover 6, the U-shaped clamping groove 1201 of the reset hook 1203 is inserted into the head clamping groove 1901 of the trip core 19 after passing through the reset hole 910 on the control circuit board, and finally the inner cover 6 is fixed on the control circuit board, for example, by a clamping hook, so that the assembly of the whole movement assembly can be completed, as shown in fig. 6.

Returning to fig. 2, after the assembly of the movement assembly is completed, the live wire input welding hole 901, the neutral wire input welding hole 902 and the ground wire welding hole 907 on the control circuit board 9 are aligned with and welded with the live wire input sheet 201, the neutral wire input sheet 202 and the ground connection wire 205 on the base 2, respectively, and then the waterproof cap assembly 4 can be mounted. The waterproof cap assembly 4 is a single component and is in form-fit with the reset button 7 and the test button 8. In some embodiments, the waterproof cap assembly 4 may also be provided with perforations 403 that fit the light guide cap 603. After that, the movement assembly is fitted into the base 2 by the coil fixing hooks 1701 (fig. 6 and 7) on the coil bracket 17, and the upper cover 1 and the base 2 are fixed by the fitting screws 10 and 25, that is, the assembled state at the time of shipment of the product is completed. In some embodiments, a waterproof ring 26 may also be provided between the base 2 and the upper cover 1. When the user needs to use, the power line can be sleeved into the threading hole of the line card 5 and clamped into the line card position of the leakage protection device to be connected with the power line. After the power line is connected, the pressing line block 23 and the pressing line screw 24 are assembled, and finally the rear cover 3 and the assembling screw 10 for fixing the rear cover are assembled, the whole product is assembled and can be used normally.

As can be seen from the above description, the leakage protection device of the present disclosure reasonably optimizes the structure and layout of the internal components, and simplifies assembly and improves production efficiency by forming, for example, a base assembly, a trip contact arm assembly and a corresponding movement assembly.

The following describes the use process of the earth leakage protection device in brief with reference to fig. 11 to 13.

Fig. 11 shows a schematic view of the earth leakage protection device in a tripped state. After the power is turned on, the control circuit board 9 is powered on, and the trip coil 18 is powered on, so that the trip iron core 19 is exposed out of the trip coil 18, and the magnetic field generated by the trip coil 18 is insufficient to enable the trip iron core 19 to move towards the inside of the trip coil 18.

As shown in fig. 12, when the reset button 7 is pressed, the reset member 12 will move downward correspondingly, the end of the reset hook 1203 will contact with the reset inclined plane 214 on the lower base 2 (the arc bend 1201 of the head of the reset hook 1203 is more beneficial to the downward sliding of the reset hook on the inclined plane), under the action of the inclined plane, the reset hook 1203 will move to the left as shown in the drawing, and since the U-shaped clamping groove 1201 of the reset hook 1203 is clamped into the head clamping groove 1901 of the trip iron core 19, the trip iron core 19 will be driven to move to the left at this time. When moved to a certain distance, the magnetic field strength to which the trip iron core 19 is subjected increases, and the magnetic field strength is enough to attract the trip iron core 19 to move leftwards until the tail end of the trip iron core 19 is attracted and held by the leftmost inner side face 1801 of the magnetic conductive frame. At this time, since the reset hook 1203 is pulled and held leftward by the trip iron core 19, the reset button 7 moves upward under the urging force of the reset spring 13 when the hand is released. Meanwhile, since the reset hook 1203 is located below the bayonet 2203 of the release 22, the reset hook 1203 hooks the release 22, so as to drive the two elastic contact arms thereon to move upwards together, and make the movable electrical contacts on the live wire moving contact arm 20 and the neutral wire moving contact arm 21 contact with the electrostatic contacts on the control circuit board 9, thereby realizing power connection. Fig. 13 shows a schematic view of the earth leakage protection device in a reset state.

When the load end generates electricity leakage, the elements on the control circuit board 9 send out signals to enable the tripping coil 18 to lose electricity, the attraction force of the tripping coil to the tripping iron core disappears, and as the reset hook 1203 bends obliquely relative to the reset piece 12 and forms an inclined plane, if the U-shaped clamping groove 1201 of the reset hook is not pulled by the tripping iron core 19, the tripping iron core slides out of the bayonet 2203 on the release 22 under the action of the reset spring 13, thereby realizing tripping, and the movable electric contacts on the live wire movable contact arm 20 and the zero line movable contact arm 21 are separated from contact with the static electric contacts on the control circuit board 9, so that the breaking of electric power is realized.

It should be understood herein that the embodiments shown in the drawings only show alternative shapes, sizes and arrangements of the various optional components of the earth leakage protection device according to the present disclosure, however, they are merely illustrative and not limiting, and that other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present disclosure.

While the technical contents and features of the present disclosure have been disclosed above, it will be understood that those skilled in the art may make various changes and modifications to the above disclosed concept under the inventive concept of the present disclosure, but all fall within the scope of the present disclosure. The above description of embodiments is illustrative and not restrictive, and the scope of the disclosure is defined by the claims.

Claims (12)

1. The electric leakage protection device comprises a shell and a core assembly arranged in the shell, and is characterized in that the core assembly comprises a control circuit board, an input assembly, an output assembly, a reset assembly and a tripping assembly, wherein the input assembly and the output assembly are coupled with the control circuit board; the leakage protection device further comprises a safety component which is connected with the input component in series and comprises a fuse and a fuse connecting piece.

2. The earth leakage protection device of claim 1, wherein the input assembly comprises a pair of input tabs disposed on either side of the housing and connected to corresponding tabs and the control circuit board, respectively, wherein the tabs are integrally fixed to the housing.

3. The earth leakage protection device of claim 2, wherein the input assembly further comprises a ground connection wire having one end connected to a ground tab and another end soldered to a ground output via a ground soldering hole on the control circuit board.

4. The electrical leakage protection device of claim 2, wherein the fuse is sandwiched between two fuse clips, the pair of input clips comprising a neutral input clip and a live input clip, the tab comprising a neutral tab and a live tab; one end of the fuse connecting piece is connected to the fire wire inserting piece, the other end of the fuse connecting piece is connected with one fuse clamping piece, and the fire wire input piece is connected to the other fuse clamping piece.

5. The leakage protection device of claim 1, wherein the output assembly comprises a pair of spring contact arms, each spring contact arm provided with an electrical contact, the spring contact arms and corresponding output terminals being respectively coupled to the control circuit board.

6. The leakage protection device of claim 5, wherein the control circuit board is provided with electrostatic contacts to mate with the electrokinetic contacts.

7. The leakage protection device of claim 5, wherein the trip assembly comprises a trip coil, a trip core, and a trip unit, the spring contact arm is adapted to slide into a sliding slot provided on the trip unit, wherein a sliding end of the spring contact arm is provided with a tab, and the tab is adapted to engage a positioning opening in the sliding slot after the spring contact arm is slid into place.

8. The leakage protection device of claim 7, wherein the reset assembly comprises a reset button protruding out of the housing, a reset member connected to the reset button by a reset button, and a reset spring sleeved on the reset member; the reset button is provided with a clamping claw to be fixed with a clamping groove in the reset button, and the reset piece is provided with a hanging hole to be sleeved on a hanging arm arranged on the reset button.

9. The leakage protection device of claim 8, wherein the reset member is adapted to pass through a bayonet provided on the trip unit and is provided with an obliquely bent reset hook provided with a U-shaped slot to mate with the trip core.

10. The leakage protection device of claim 9, wherein the end of the reset hook is provided with an arcuate bend that mates with a reset ramp in the housing to effect reset of the leakage protection device.

11. The earth leakage protection device of claim 1, comprising a test assembly including a test button protruding outside the housing, a test tab connected to the test button, and a test spring sleeved on the test tab; the test piece is provided with a clamping claw to be fixed with a clamping groove in the test button, the test piece is also provided with a pair of elastic arms integrated with the clamping claw, and the test assembly can be switched between a conducting state contacting the control circuit board and a disconnecting state separating from the control circuit board through the elastic arms.

12. The earth leakage protection device of claim 11, wherein the test button is provided with a stop rib that abuts the control circuit board in the on state to limit excessive deformation of the resilient arm.