CN216390479U - Leakage protector - Google Patents

Abstract

The utility model provides an electric leakage protection device which comprises a shell and a movement assembly arranged in the shell, wherein the shell comprises an upper cover and a base, and the movement assembly is assembled into an integral piece to be accommodated in one of the upper cover and the base and connected with the other of the upper cover and the base in a sealing manner. According to the utility model, the movement assembly is assembled into an integral piece and is arranged in the shell, and the movement assembly is coated by one of the upper cover and the base, so that the use safety of the product is ensured, the volume of the product is greatly reduced, the production and processing efficiency is improved, and the cost is reduced. In some embodiments, the casing provides a waterproof structure inside, making the earth leakage protection device of the present invention particularly suitable for use in applications where it is compact and has waterproof requirements.

Description

Leakage protector

Technical Field

The present invention relates generally to the electrical field, and more particularly to a leakage protection device.

Background

With the increasing popularization of household appliances, people pay more and more attention to the safety of electric use. At present, many household appliances are equipped with an earth leakage protection device at the input end or the output end of a power supply so as to ensure the safety of electricity utilization of users. For the traditional plug, the structure is complex, the production process is complex, the processing is inconvenient, the cost is high, particularly, the waterproof performance is poor, when the traditional plug is applied to occasions with higher humidity such as a bathroom and the like, water enters the traditional plug due to the lack of a waterproof sealing structure, so that the electronic element is short-circuited or fails, the electric leakage protection function is lost or the hidden trouble of electricity utilization is caused, and the use requirement of a user cannot be met. Under certain specific application conditions, such as the bathroom industry, the leakage protection plug used on the original traditional water heater has a large appearance, and if the leakage protection plug is used on an intelligent bathroom electrical appliance, the leakage protection plug is heavy and incongruous, so that a small leakage protection plug with a smaller volume and an attractive appearance is needed to be matched with the leakage protection plug, and particularly when the leakage protection plug needs to be inserted into a socket with a waterproof box, the small and ultrathin leakage protection plug is needed due to the fact that the inner space of the waterproof box is small.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an improvement based on the factors to be considered, provides an electric leakage protection device capable of meeting the compact application scene, and further improves the safety and the use comfort.

To this end, according to the present invention, there is provided an earth leakage protection device, comprising a casing and a movement assembly disposed in the casing, wherein the casing comprises an upper cover and a base, and the movement assembly is assembled as an integral piece to be accommodated in one of the upper cover and the base and hermetically connected to the other of the upper cover and the base.

The present invention may further include any one or more of the following alternatives according to the above technical idea.

In some alternatives, the engine assembly includes a control circuit board, and an input assembly and an output assembly coupled to the control circuit board, the output assembly includes a pair of elastic contact arms, each of the elastic contact arms passes through a detection assembly coupled to the control circuit board and has a bent output end, and the output ends of the pair of elastic contact arms are bent in opposite directions, respectively.

In some optional forms, the movement assembly further comprises a tripping assembly coupled with the control circuit board, and a bracket for limiting the tripping assembly, the input assembly is arranged on the bracket so that the tripping assembly can switch on or off the input assembly and the output assembly, and the bracket is suitable for being clamped with the detection assembly into a whole.

In some optional forms, the output assembly further comprises an output wiring device, the output wiring device comprises an output electric wire coupled with the movement assembly or a wiring assembly connected with the output electric wire, and the bracket is provided with a ground wire clamping groove suitable for connecting a ground wire in the output electric wire to the input assembly.

In some optional forms, the output wiring device comprises a line card, the upper cover or the base is provided with a through hole for connecting the line card, and a buckle matched with a bayonet on the line card is arranged in the shell to prevent the line card from falling off.

In some alternatives, the trip assembly includes a trip unit having a pair of trip arms corresponding to the pair of resilient contact arms, and each trip arm has a limit boss for limiting a resilient end of the resilient contact arm.

In some optional forms, the movement assembly further includes a reset assembly, the reset assembly is matched with the tripping assembly, wherein the reset assembly includes a reset button arranged outside the shell, and the reset button is flat and provided with an arc-shaped concave pressing portion.

In some optional forms, the earth leakage protection device further comprises a waterproof cap disposed between the upper cover and the movement assembly, the waterproof cap being constructed as a single component and provided with a guide hole that is in close fit with the reset assembly, the movement assembly further comprising a light guide assembly, the waterproof cap being provided with a light guide pillar adapted to guide light.

In some alternatives, the earth leakage protection device further comprises a casing waterproof ring disposed between the upper cover and the base, the casing waterproof ring being configured as a single member and surrounding a positioning portion formed on a fitting surface of the upper cover and the base.

In some alternatives, the detent is configured as a detent wall that is recessed from an edge of the cover or base.

According to the utility model, the movement assembly is assembled into an integral piece and is arranged in the shell, and the movement assembly is coated by one of the upper cover and the base, so that the use safety of the product is ensured, the volume of the product is greatly reduced, the production and processing efficiency is improved, and the cost is reduced. In some embodiments, the casing provides a waterproof structure inside, making the earth leakage protection device of the present invention particularly suitable for use in applications where it is compact and has waterproof requirements.

Drawings

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

FIG. 1 is a schematic diagram of an earth leakage protection device according to an embodiment of the utility model;

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

FIG. 3 is an exploded view of the core assembly of the earth leakage protection device of FIG. 1;

figure 4 is a partially exploded schematic view of the cartridge assembly of figure 3;

fig. 5 is a schematic cross-sectional view of the earth leakage protection device in a tripped state (open/tripped) in accordance with the present invention;

fig. 6 is a schematic cross-sectional view of the earth leakage protection device in a reset state (on/off).

Detailed Description

The practice and use 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 utility model, and do not limit the scope of the utility model. The description herein of the structural positions of the respective components, such as the directions of upper, lower, top, bottom, etc., is not absolute, but relative. When the respective components are arranged as shown in the drawings, these direction expressions are appropriate, but when the positions of the respective components in the drawings are changed, these direction expressions are changed accordingly.

In this document, the terms "coupled" and "connected" should be interpreted broadly, e.g., "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.

The idea of the present invention is to provide a product with reduced volume and preferably waterproof properties, in view of the problem that existing earth leakage protection devices are large in size and not suitable for compact environments. In the illustrated embodiment, a plug is used as an example, however it should be understood that any remaining earth leakage protection device applicable to the inventive concept is not excluded.

Referring first to fig. 1 and 2, the earth leakage protection device of the present invention comprises a housing and a movement assembly 4 disposed in the housing, the housing may comprise an upper cover 1 and a base 5 which are snap-fixedly connected together by a plurality of fasteners or mechanical structures, in the illustrated embodiment, the fasteners may be screws 9 and screw plugs 10 exemplarily shown in fig. 2. The movement assembly 4 includes a control circuit board, and an input assembly and an output assembly coupled to the control circuit board, thereby achieving electrical connection of the input terminal and the output terminal.

As shown in fig. 3 and 4, the input assembly includes blades, such as a ground blade 46, a neutral blade 47, and a hot blade 48, which extend out of the base of the housing. The output assembly includes a pair of resilient contact arms, such as a neutral contact arm 434, a live contact arm 435, and an output wiring device 6, the output wiring device 6 extending out of the housing and may include an output wire coupled to the movement assembly 4 or a wiring assembly connected to the output wire to facilitate free connection of the output wire by a user, the output wire including, for example, a neutral wire 601, a live wire 602, a ground wire 603 as shown in fig. 2, wherein the neutral wire 601, the live wire 602 are soldered to the control circuit board. The output wiring device can also comprise a line card, and a buckle 7 matched with the bayonet 604 on the line card is arranged in the shell to prevent the line card from falling off, and the bending resistance and the service life of the output wiring device 6 are improved. Alternatively, the catch 7 may be configured in the illustrated U-shape.

In some embodiments, as best shown in fig. 2, the movement assembly 4 is advantageously assembled as a single piece to be housed, for example, in the upper cover 1 and to be hermetically connected to the base 5, i.e. the upper cover 1 occupies almost the entire product and encloses the base 5 therein. In this way, the structure of the product is simplified, the size of the product is reduced, the base part can be seen from one side of the inserting sheet outside the product, and the whole appearance is simple and attractive. In order to obtain the sealing of the housing to be suitable for the environment requiring waterproof, a housing waterproof ring 8 is provided between the upper cover 1 and the base 5, and the housing waterproof ring 8 is configured as a single annular member and surrounds positioning portions formed on the fitting surfaces of the upper cover 1 and the base 5. In some embodiments, the positioning portion is configured as a positioning wall 51 formed by retracting from the edge of the base 5, so that the case flashing 8 is not easy to fall off, and is convenient to assemble, as shown in fig. 2. It should be understood that the base may be configured to occupy a larger portion to accommodate the engine assembly, and the cover may be configured to be covered by the base, such that the positioning wall may be disposed over the cover.

In the illustrated embodiment, the movement assembly 4 includes a reset assembly and a test assembly, and the upper cover 1 is provided with a reset button opening 11 and a test button opening 12 through which the reset button 2 and the test button 33 protrude. Further, due to the size design of the upper cover 1, the output wiring device 6 can be connected to the inside of the housing via the through hole 14 provided on the side wall of the upper cover 1.

After the waterproof ring 8 of the shell is adopted, the waterproof effect of the joint of the upper cover and the base can be well ensured to a certain extent. To further improve the waterproof performance, a waterproof cap 3 may also be provided between the upper cover 1 and the movement assembly 4, the waterproof cap 3 being constructed as a single part and provided with a guide hole 31 to be closely fitted with the reset assembly, and optionally a profile to be fitted with the reset button 2 and the test button 33. In some embodiments, the engine assembly 4 further comprises a light guide assembly, such as an LED assembly, and the waterproof cap 3 may be provided with a light guide post 32 adapted to softly guide light generated by the LED to the outside of the housing to indicate the operating state. Correspondingly, the upper cover 1 is provided with an indicator light guide hole 13.

As mentioned above, the movement assembly 4 of the earth leakage protection device of the present invention is assembled as a single piece and then assembled into the housing, and advantageously, the components of the movement assembly can be stacked on top of each other and snapped into each other, and an exemplary assembly sequence is described below in connection with fig. 3 and 4.

In addition to the reset assembly and the test assembly mentioned above, the movement assembly 4 further includes a detection assembly and a trip assembly, both of which may also be referred to as a magnetic loop coil assembly. As shown in fig. 4, the neutral and live moving contact arms 434 and 435 of the output assembly pass through a detection assembly 433 (also called a magnetic ring assembly) coupled to the control circuit board 431, and the side edges of the moving contact arms can be clamped to a limit hook 4331 provided on the detection assembly 433 without falling off. In particular, the movable contact arm has output terminals 4341, 4351 extending out of the sensing assembly and bent, and the output terminals 4341, 4351 are bent in opposite directions, for example, at 90 degrees, respectively. Therefore, the electric clearance between the zero-fire lines can be increased, the whole length of the movement assembly can be greatly shortened, and the length of the whole product can be reduced.

The trip assembly (also referred to as a coil assembly) includes a coil former 432, a trip core 437 and a trip spring 438, the trip core 437 and the trip spring 438 are nested in corresponding holes of the coil former 432, and a coil stop 436 is inserted onto the coil former 432, and the anti-seize trip core 437 and the trip spring 438 are ejected. The trip assembly and the detection assembly are then inserted into the control circuit board 431 for wave soldering, for example, to complete the assembly to form the magnetic loop coil PCBA assembly 43.

As shown in fig. 3, the trip assembly further includes a trip unit 44, the movement assembly 4 further includes a bracket 45 for limiting the trip unit 44, and the ground insertion piece 46, the neutral insertion piece 47 and the live insertion piece 48 of the input assembly are arranged and limited on the bracket 45, so that the trip unit 44 can switch on or off the input assembly and the output assembly. Also, the bracket 45 is adapted to snap-fit with the detection assembly as a unit. In this embodiment, the bracket 45 may snap fit with the magnetic loop coil PCBA assembly 43. Specifically, a plurality of hooks 4321 (fig. 4) are disposed on the coil frame 432 of the magnetic loop coil PCBA assembly 43, and a plurality of corresponding clamping interfaces 4501 are disposed on the support 45, so that the support 45 can be clamped on the coil frame 432 by aligning and inserting each other.

In certain embodiments, a water-resistant pressure plate 49 may be included that fits over the insert to prevent water from entering from the insert location. The waterproof pressure plate 49 may be constructed as a single part and provided with a tab hole into which a tab is inserted. In addition, as shown in fig. 3, the waterproof pressing plate 49 may be provided with a plurality of snap rings 4901, and the bracket 45 is correspondingly provided with a plurality of snap protrusions 4502. In this manner, the waterproof pressure plate 49 can be snap-fitted to the bracket 45 as a whole. In an alternative embodiment, a waterproof pad 410 made of, for example, silicone may be further provided, and a plug hole tightly matching with the insert is formed thereon, so that the waterproof pad can be tightly sleeved on the insert without falling off, and is tightly pressed between the waterproof pressing plate 49 and the inner surface of the base 5 to achieve a waterproof effect.

In the illustrated embodiment, the tripper 44 is provided with a pair of trip arms corresponding to a pair of elastic contact arms, and each trip arm is provided with a limit boss 4401 for limiting the elastic end of the elastic contact arm, and optionally, the limit boss may be provided at a substantially middle position of the trip arm. As shown in fig. 4, the elastic ends of the neutral moving contact arm 434 and the live moving contact arm 435 are respectively provided with a neutral moving contact 4342 and a live moving contact 4352. Correspondingly, the zero line plug-in piece 47 and the live line plug-in piece 48 are respectively provided with a zero line static contact 4701 and a live line static contact 4801. Due to the design of the limiting boss 4401, when the forming angle of the moving contact has deviation, the moving contact can be prevented from deflecting, the butt joint of the moving contact and the static contact is accurate, and the smooth communication of the input end and the output end is ensured.

In the illustrated embodiment, the reset assembly includes a reset button 2, a reset lever 41 and a reset spring 42. During assembly, the return spring 42 is sleeved in a spring guide hole in the return rod 41 and then passes through a through hole arranged on the magnetic ring coil PCBA assembly 43 to be connected with the release 44. Wherein, be equipped with reset pothook 4101 on reset lever 41, it can with the mutual joint of release pothook 4402 on release 44, simultaneously because release 44 is limited in position on support 45, so reset lever 41 can the straining but can not pop out under the spring force effect, so just accomplished the whole assembly of cassette mechanism subassembly to the cassette mechanism subassembly compact structure that the equipment was accomplished, the size compares in current design and reduces by a wide margin.

Advantageously, although the overall bulk of the earth leakage protection device is reduced by the structural improvement, the components for user operation may be designed in normal size or even larger size to meet the operating comfort requirements. In some embodiments, as shown in fig. 2, the reset button 2 is configured in a flat shape and may be slightly larger than the size of a human finger, and an arc-shaped concave pressing portion 21 may be disposed at the middle position of the button to be matched with the finger surface, so that the operation is more convenient and the user experience is better.

In some alternative embodiments, as shown in fig. 2 and 3, the bracket 45 is provided with a ground wire clamping slot 4503 adapted to connect the ground wire 603 of the output wire to the ground wire tab 46 of the input component, and the ground wire 603 passing through the ground wire clamping slot 4503 on the bracket 45 can be riveted to the wire clamping end 4601 of the ground wire tab 46, so that the ground wire can be well positioned and isolated for protection, and the assembly is convenient.

The reset procedure and the trip procedure of the earth leakage protection device of the present invention are summarized below with reference to fig. 5 and 6.

Fig. 5 shows a schematic diagram of the leakage protection device in a tripping state, that is, a state when the moving contact and the static contact are disconnected, taking a zero line as an example, at this time, a zero line moving contact 4342 on the moving contact and a zero line static contact 4701 on a zero line insertion piece 47 are in a disconnection state, a release 44 is located below the moving contact and is in a unhooking state with a reset rod 41, the reset rod 41 bounces upward to push against the reset button 2, and at this time, one end of a tripping iron core 437 is pushed against the release 44 under the action of a tripping spring 438, so that the release 44 is in a vertical state.

Fig. 6 shows a schematic diagram of the earth leakage protection device in a reset state, that is, a state when the movable contact and the fixed contact are closed, when the reset button 2 is pressed, the reset rod 41 is also pressed at the same time, the reset hook 4101 on the reset rod 41 pushes the trip hook 4401 on the trip 44 open, so that the trip 44 rotates to the right, when the reset hook 4101 moves down to the lower side of the trip hook 4401, the trip 44 returns to the vertical state again under the action of the trip core 437, and at this time, the trip hook 4401 is located above the reset hook 4101. When the downward pressure is removed, when the reset rod 41 moves upward under the action of the reset spring force, the reset rod 41 hooks the release 44 and moves upward together with the moving contact, so that the zero line moving contact 4342 and the zero line static contact 4701 are respectively contacted together, thereby realizing a switch-on state and obtaining power output.

When leakage current is generated in the circuit or the test button 33 is pressed, the trip coil generates a magnetic field, the trip iron core 437 pulls the trip device 44 to rotate rightwards, so that the trip device is disconnected from the reset rod 41, the trip device 44 moves downwards under the action of the elastic force of the movable contact arm, the zero line movable contact 4342 is separated from the zero line fixed contact 4701, and the power output is interrupted.

Through the above description, due to the adoption of the integral assembly of the movement assembly, the combination of the improvement of the shell structure and the waterproof structure in the shell, the leakage protection device realizes the reduction of the size of the integral product and the omnibearing sealing, keeps the inside of the plug dry, is favorable for the safe reliability when being used in places with water or high humidity, and has long service life and wide application range. It should be understood that the waterproof cap, the waterproof pressure plate and the waterproof pad in the above embodiments are all shown and described as being integrally formed, so that the waterproof cap, the waterproof pressure plate and the waterproof pad have good waterproof performance and are convenient to process and assemble, however, the waterproof cap, the waterproof pressure plate and the waterproof pad can be formed separately or partially in a combined mode according to actual needs, and rubber injection molding can be adopted.

It is to be understood herein that the embodiments shown in the figures show only alternative shapes, sizes and arrangements of the various optional components of the earth leakage protection device according to the utility model, which are, however, merely illustrative and not restrictive, and that other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the utility model.

While the technical content and the technical features of the utility model have been disclosed, it is understood that various changes and modifications of the disclosed concept can be made by those skilled in the art within the spirit of the utility model, and the utility model is not limited thereto. The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the utility model is defined by the appended claims.

Claims (10)

1. The electric leakage protection device comprises a shell and a movement assembly arranged in the shell, and is characterized in that the shell comprises an upper cover and a base, and the movement assembly is assembled into an integral piece to be accommodated in one of the upper cover and the base and be in sealing connection with the other one of the upper cover and the base.

2. An earth leakage protection device according to claim 1, wherein the movement assembly comprises a control circuit board, and an input assembly and an output assembly coupled to the control circuit board, the output assembly comprising a pair of elastic contact arms, each elastic contact arm passing through a detection assembly coupled to the control circuit board and having a bent output end, the output ends of the pair of elastic contact arms being bent in opposite directions, respectively.

3. The earth leakage protection device of claim 2, wherein the movement assembly further comprises a trip assembly coupled to the control circuit board, and a bracket for limiting the trip assembly, the input assembly is disposed on the bracket so as to facilitate the trip assembly to switch on or off the input assembly and the output assembly, wherein the bracket is adapted to be integrally clamped with the detection assembly.

4. A residual current device according to claim 3, characterized in that said output assembly further comprises an output wiring device, said output wiring device comprises an output electric wire coupled with said movement assembly or a wiring assembly connected with said output electric wire, said bracket is provided with a ground wire slot adapted to connect the ground wire in said output electric wire to said input assembly.

5. An earth leakage protection device according to claim 4, wherein the output wiring device comprises a line card, the upper cover or the base is provided with a through hole for connecting the line card, and a buckle adapted to the bayonet of the line card is provided in the housing to prevent the line card from falling off.

6. A residual current device according to claim 3, characterized in that said tripping assembly comprises a tripping device, said tripping device is provided with a pair of tripping arms corresponding to said pair of elastic contact arms, each tripping arm is provided with a limit boss for limiting the elastic end of the elastic contact arm.

7. A residual current device according to claim 3, characterized in that said movement assembly further comprises a reset assembly, said reset assembly is matched with said trip assembly, wherein said reset assembly comprises a reset button arranged outside said casing, said reset button is configured in a flat shape and is provided with a pressing portion with an arc-shaped concave recess.

8. A residual-current protection device according to claim 7, characterized in that it further comprises a waterproof cap arranged between said upper cover and said movement assembly, said waterproof cap being constructed as a single piece and provided with a guiding hole for mating with said reset assembly, said movement assembly further comprising a light guiding assembly, said waterproof cap being provided with a light guiding post adapted to guide light.

9. A residual current device according to claim 1, characterized in that it further comprises a casing waterproof ring arranged between the upper cover and the base, the casing waterproof ring being constructed as a single component and surrounding the positioning portion formed on the fitting surface of the upper cover and the base.

10. A residual current device as claimed in claim 9, characterized in that the positioning part is configured as a positioning wall which is formed by retracting from the edge of the upper cover or the base.

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