CN109390730B - Leakage protection plug - Google Patents
Leakage protection plug Download PDFInfo
- Publication number
- CN109390730B CN109390730B CN201710689854.9A CN201710689854A CN109390730B CN 109390730 B CN109390730 B CN 109390730B CN 201710689854 A CN201710689854 A CN 201710689854A CN 109390730 B CN109390730 B CN 109390730B
- Authority
- CN
- China
- Prior art keywords
- output
- detection coil
- assembly
- contact arm
- leakage protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 73
- 239000002184 metal Substances 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 4
- LJQOBQLZTUSEJA-UHFFFAOYSA-N 1,2,3,5-tetrachloro-4-(2,3,5,6-tetrachlorophenyl)benzene Chemical compound ClC1=C(Cl)C(Cl)=CC(Cl)=C1C1=C(Cl)C(Cl)=CC(Cl)=C1Cl LJQOBQLZTUSEJA-UHFFFAOYSA-N 0.000 description 9
- 238000005476 soldering Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
Abstract
The invention provides a leakage protection plug, which comprises a shell formed by an upper cover and a base, a core assembly and an output wire, wherein the core assembly is arranged in the shell, the core assembly comprises a control circuit board, a detection assembly and a tripping assembly, the detection assembly and the tripping assembly are arranged on the control circuit board, an input inserting sheet and an output moving contact arm are installed in a matched manner with the core assembly, the output moving contact arm is integrally formed and is clamped and fixed with the detection assembly, and the output end of the output moving contact arm is directly connected with the output wire. The leakage protection plug has the advantages of simple integral structure and reliable assembly, and the input and the output are directly connected through the integrally formed output movable contact arm, so that the accuracy of the leakage parameter value is effectively improved, meanwhile, the switching and welding points in the product are reduced, the product volume is reduced, and the cost is greatly reduced.
Description
Technical Field
The invention belongs to the field of electric generally, and particularly relates to a leakage protection plug.
Background
With the increasing popularity of household appliances, people pay more and more attention to the use safety of the household appliances, and at present, many household appliances are equipped with leakage protection plugs at the input ends of power supplies. However, the existing earth leakage protection plugs generally have the following defects: for example, because the detection coil in the leakage protection plug product is not effectively fixed, the reliability is relatively poor because the detection coil shakes to cause the drift of the leakage parameter value; for example, the existing leakage protection plug has the defects that the internal temperature rise of a product is high, the reliability is poor and the production and processing difficulty is increased due to the fact that the switching or welding point is increased due to the fact that the internal connecting wires are multiple (an adapter wire is arranged between a moving contact and an output wire to pass through a detection coil in general); for example, the existing earth leakage protection plug has large volume, occupies most of the area of the socket or the wire-pulling board when in use, reduces the service efficiency of the socket and correspondingly increases the cost.
Disclosure of Invention
In order to solve the above-mentioned drawbacks, an object of the present invention is to provide a leakage protection plug structure, which reliably fixes a detection coil inside a product to improve the accuracy of a leakage parameter value, and simultaneously reduces the switching and welding points inside the product to improve the reliability of the product, and reduces the volume of the product and the cost by reasonable design and layout of internal parts.
Therefore, according to the invention, there is provided a leakage protection plug, which comprises a housing composed of an upper cover and a base, a core assembly arranged in the housing, and an output wire, wherein the core assembly comprises a control circuit board, a detection assembly and a tripping assembly which are arranged on the control circuit board, an input insertion piece and an output moving contact arm are installed in a matched manner with the core assembly, wherein the output moving contact arm is integrally formed and is clamped and fixed with the detection assembly, and an output end of the output moving contact arm is directly connected with the output wire.
The present invention may further include any one or more of the following preferred forms according to the above technical idea.
In some preferred forms, the detection assembly comprises a detection coil box, a detection coil and at least one metal sheet, wherein the detection coil and the metal sheet are accommodated in the detection coil box, a detection coil cover for covering and fixing the detection coil and the metal sheet is arranged on the detection coil box, a through hole for the output movable contact arm to pass through is formed in the detection coil box, and the output end of the output movable contact arm passes through the through hole and is connected with an output wire.
In certain preferred forms, the detection coil box, the detection coil, the metal sheet, and the detection coil cover are fixed to each other by an adhesive.
In some preferred forms, a positioning member is provided between the output moving contact arm and the detection coil box, the positioning member including a positioning post or hole provided on the mounting section of the output moving contact arm, and a positioning hole or post provided on the detection coil box.
In some preferred forms, the detecting coil box further comprises a moving contact cover, the moving contact cover clamps the mounting section of the output moving contact arm with the detecting coil box, wherein the moving contact cover is provided with a through hole matched with the mounting section of the output moving contact arm or a positioning column on the detecting coil box, and the detecting coil box further comprises a positioning lug, and the positioning lug is clamped into a clamping groove correspondingly arranged on the detecting coil box.
In some preferred forms, the movable contact cover further comprises a positioning hook, and the positioning hook is matched and clamped into a correspondingly arranged mounting hole on the control circuit board.
In certain preferred forms, the trip assembly includes a trip coil form having a slot for receiving the input tab, a trip core, and a trip spring.
In some preferred forms, the tripping coil frame is further provided with a mounting plate matched with the detection coil box, and the free section of the output moving contact arm is positioned through the mounting plate or a limit groove on the detection coil box.
In some preferred forms, the movement assembly further includes a varistor, and the trip coil former is provided with pin holes for receiving the varistor.
In certain preferred forms, the upper cover and the base are positioned and secured by a clamping member comprising a catch or clasp disposed on the upper cover and a clasp or catch disposed on the base.
In some preferred forms, the cable clamp is further provided with a cable clamp for wrapping the output cable, and the cable clamp is fixed through a bayonet arranged on the shell.
The leakage protection plug has the advantages of high reliability, small volume, simple structure, low cost, convenient production and the like by using the integrally formed output movable contact arm and directly connecting the output movable contact arm with an output wire.
Drawings
Other features and advantages of the present invention will be better understood from the following detailed description of the preferred embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic external view of a leakage protection plug according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the earth leakage protection plug of FIG. 1 in a forward exploded view;
FIG. 3 is a reverse exploded view of the earth leakage protection plug of FIG. 1;
FIG. 4 is a schematic side view of a cartridge assembly layout equipped with an input tab and an output moving contact arm;
FIG. 5 is another side schematic view of a cartridge assembly layout;
FIG. 6 is an exploded view of the assembly of FIG. 4 or FIG. 5;
FIG. 7 is an exploded view of the detection assembly;
fig. 8 is a schematic diagram of an output moving contact arm.
Detailed Description
The making and using of the embodiments are discussed in detail below. It should be understood, however, that the detailed description and the specific examples, while indicating specific ways of making and using the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. 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.
Referring first to fig. 1-3, there is shown a leakage protection plug according to a preferred embodiment of the present invention. The leakage protection plug comprises a shell body consisting of an upper cover 1 and a base 3, wherein a core assembly 2, an output electric wire 4, an L-line input inserting sheet 211, an N-line input inserting sheet 212 and an output movable contact arm are arranged in the shell body. The output wire 4 may have a wire clip 5 covering it, and the wire clip 5 is fixed by a bayonet 103 provided on the upper cover 1 and a bayonet 303 provided on the base 3, so as to improve the bending resistance of the product. A reset button 11 and a test button 12 can be arranged between the upper cover 1 and the movement assembly 2. When the components in the housing are assembled, they can be positioned by the clamping members provided on the upper cover 1 and the base 3, respectively, and fixed by the fastening members such as the screws 31. In the embodiment shown, the snap-on means comprise, for example, catches 101, 102 (fig. 3) provided on the upper cover 1 and catches 301, 302 (fig. 2) provided on the base 3. The clamping member is preferably provided at one end of the housing and the fastening member is provided at the other end of the housing. It will be appreciated that a catch may be provided in the upper cover and a catch in the base, and that the number of catches or catches may be one or more. In this way, good assembly quality of the product can be achieved and assembly time reduced.
The movement assembly in the earth leakage protection plug according to the present invention is described in detail below. Referring to fig. 4 to 8 in combination with fig. 2 and 3, the movement assembly 2 includes a control circuit board PCB 201, a detection assembly 202 and a trip assembly provided on the PCB 201, and input tabs 211, 212 and output moving contact arms are respectively mounted in cooperation with the movement assembly 2, and in particular, the output moving contact arms are integrally formed and fastened to the detection assembly 202, wherein output ends of the output moving contact arms are directly connected to the output wires 4, which will be described in detail later.
Fig. 6 shows the input tab, the movement assembly and the PCB, and in particular shows the composition of the trip assembly. The PCB 201 is provided with a hole groove for fixing the detection assembly 202 and the trip assembly. The trip assembly includes a trip coil bobbin 203, a trip core 205, and a trip spring 206, wherein one end of the trip coil bobbin 203 is provided with slots 211A, 212A that receive input tabs 211, 212. The L-line input tab 211 and the N-line input tab 212 are provided with stationary contacts 211C, 212C, respectively, and the tail ends thereof are insertable into the slots 211A, 212A. The movement assembly may also include a varistor 204 with two pin holes for receiving the varistor 204 positioned intermediate the slots 211A, 212A of the trip coil bobbin 203. Thus, the L-wire input tab 211, the N-wire input tab 212, and the varistor 204 may be fixedly soldered to the PCB 201 by physical limiting of the trip coil form.
As best shown in fig. 7 and 8, in the preferred embodiment, the detection assembly 202 includes a detection coil housing 2021, a detection coil 2022 housed within the detection coil housing 2021, and at least one metal sheet, one metal sheet 2023 being shown by way of example in fig. 7, it being understood that the metal sheets may also be mounted on both sides of the detection coil 2022. The detection assembly 202 further includes a detection coil cover 2024 that covers and secures the detection coil 2022 and the metal sheet 2023. After the detection coil 2022, the metal sheet 2023, and the detection coil cover 2024 are all housed in the detection coil case 2021, they may be fixed to each other by adhesive. The N-line output moving contact arm 2025 and the L-line output moving contact arm 2026 are respectively formed integrally, and moving contacts 2025C and 2026C are arranged at one ends of the moving contact arms, wherein the moving contact 2025C and the fixed contact 212C on the N-line input inserting sheet 212 form a one-pole switch, and the moving contact 2026C and the fixed contact 211C on the L-line input inserting sheet 211 form a one-pole switch. The output movable contact arms 2025, 2026 have output ends 2025D, 2026D, and the detection coil box 2021 is provided with a through hole through which the output movable contact arms pass, and the output ends 2025D, 2026D can pass through the through hole to be connected with the output wire 4. Specifically, as shown in fig. 3, the N-wire moving contact 2025 and the L-wire moving contact 2026 pass through corresponding holes provided in the detection coil box 2021 and simultaneously pass through dedicated soldering holes 2011 and 2012 provided in the PCB 201. The core conductors 401 and 402 on the output wire 4 also pass through special soldering holes 2011 and 2012 arranged on the PCB 201, so that the N-wire moving contact 2025 and the L-wire moving contact 2026 can be connected with the core conductors 401 and 402 of the output wire 4 respectively by soldering, thereby realizing reliable connection of electric power.
As can also be seen from fig. 7 and 8, a positioning member is provided between the mounting section of the output moving contact arm and the detection coil box 2021. In this embodiment, the positioning member includes a positioning hole 2025B provided on the N-wire output moving contact arm 2025 and a positioning hole 2026B provided on the L-wire output moving contact arm 2026, and positioning posts 2021A, 2021B provided on the detection coil box 2021. It should be understood that the placement of the locating holes and locating posts may be interchanged accordingly. Advantageously, a moving contact cover 2027 may be further provided, said moving contact cover 2027 being capable of clamping the mounting section of the output moving contact arm with the detection coil box 2021. Wherein, the moving contact cover 2027 is provided with through holes 2027A, 2027B matching with the positioning posts 2021A, 2021B on the detecting coil box 2021. In addition, the moving contact cover 2027 further includes a positioning protrusion 2027C, and the positioning protrusion 2027C can be snapped into a corresponding slot 2021C provided on the detecting coil box 2021. In order to achieve the fixation with the PCB 201, the moving contact cover 2027 may further include a positioning hook 2027E, where the positioning hook 2027E can be engaged and snapped into a correspondingly disposed mounting hole on the PCB 201, as shown in fig. 2. Therefore, in the assembly process of the deck assembly, through the cooperation of the positioning holes and the positioning columns and the clamping of the positioning block 2027C of the moving contact cover 2027 into the clamping groove 2021C arranged on the detection coil box 2021, the positioning hooks 2027E are clamped into the corresponding holes of the PCB 201, and the relative position fixing and effective combination of all the components can be realized.
In a preferred embodiment, a mounting plate cooperating with the detection coil box 2021 may also be provided on the trip coil frame 203, and the free section of the output moving contact arm can be positioned by the mounting plate or a limit slot on the detection coil box 2021. Referring specifically to fig. 7 and 8, a limit groove 202F1 for limiting an end 2026F at a junction of the free section and the mounting section of the L-line output moving contact arm 2026 and a limit groove 202F2 for limiting an end 2025F of the N-line output moving contact arm 2025 may be provided on the detection coil box 2021. After the output moving contact arm is installed into the detection assembly 202 and the output end passes through the detection assembly 202, the installation plate on the tripping coil frame 203 is installed in cooperation with the detection coil box 2021, and the upper and lower positioning of the free section of the output moving contact arm is realized through the limiting grooves 203F1 and 203F2 and the planes 203F1 and 203F2 on the tripping coil frame 203. It is understood that the above-mentioned limit groove can also be set on the mounting plate, or on the detection coil box and mounting plate, the matched channel can be set. After the assembly is completed, the tripping assembly 203 and the detecting assembly 202, which are assembled with the input inserting sheet and the output moving contact arm, are fixed through the hole slots on the PCB, the output end of the output moving contact arm is welded with the output wire 4, and then the upper cover 1 and the base 3 are connected and fixed, so that the assembly of the whole leakage protection plug can be completed.
The leakage protection plug has the advantages of simple integral structure and reliable assembly, and the input and the output are directly connected through the integrally formed output movable contact arm, so that the accuracy of the leakage parameter value is effectively improved, meanwhile, the switching and welding points in the product are reduced, the product volume is reduced, and the cost is greatly reduced.
While the foregoing has described the technical content and features of the present invention, it will be appreciated that those skilled in the art, upon attaining the teachings of the present invention, may make variations and improvements to the concepts disclosed herein, which fall within the scope of the present invention. The above description of embodiments is illustrative and not restrictive, and the scope of the invention is defined by the claims.
Claims (8)
1. The electric leakage protection plug comprises a shell formed by an upper cover and a base, a core assembly and an output wire, wherein the core assembly is arranged in the shell, the core assembly comprises a control circuit board, a detection assembly and a tripping assembly, the detection assembly and the tripping assembly are arranged on the control circuit board, and an input inserting sheet and an output moving contact arm are mounted in a matched mode with the core assembly;
the detection assembly comprises a detection coil box, a detection coil and at least one metal sheet, wherein the detection coil and the at least one metal sheet are accommodated in the detection coil box, and a detection coil cover for covering and fixing the detection coil and the metal sheet, a through hole for the output movable contact arm to pass through is formed in the detection coil box, and the output end of the output movable contact arm passes through the through hole and is connected with an output wire; a positioning component is arranged between the output moving contact arm and the detection coil box, and comprises a positioning column or a positioning hole arranged on the mounting section of the output moving contact arm and a positioning hole or a positioning column arranged on the detection coil box; the movable contact cover is used for clamping the mounting section of the output movable contact arm with the detection coil box, wherein the movable contact cover is provided with a perforation matched with the mounting section of the output movable contact arm or a positioning column on the detection coil box and comprises a positioning lug, and the positioning lug is clamped into a clamping groove correspondingly arranged on the detection coil box.
2. The earth leakage protection plug of claim 1, wherein the detection coil case, the detection coil, the metal sheet, and the detection coil cover are fixed to each other by an adhesive.
3. The earth leakage protection plug of claim 1, wherein the movable contact cover further comprises a locating hook that is matingly snapped into a correspondingly disposed mounting hole on the control circuit board.
4. A leakage protection plug according to any one of claims 1 to 3, wherein the trip assembly comprises a trip coil block, a trip core and a trip spring, the trip coil block being provided with a slot for receiving the input tab.
5. The earth leakage protection plug of claim 4, wherein the trip coil former is further provided with a mounting plate matched with the detection coil box, and the free section of the output moving contact arm is positioned by the mounting plate or a limit groove on the detection coil box.
6. The earth leakage protection plug of claim 4, wherein said movement assembly further comprises a varistor, and said trip coil frame has pin holes for receiving said varistor.
7. The earth leakage protection plug of claim 1, wherein the upper cover and the base are positioned by a clamping member and secured by a fastener, the clamping member comprising a catch or clasp disposed on the upper cover and a clasp or catch disposed on the base.
8. The earth leakage protection plug of claim 1, further comprising a wire clip surrounding the output wire, the wire clip secured by a bayonet disposed on the housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689854.9A CN109390730B (en) | 2017-08-14 | 2017-08-14 | Leakage protection plug |
| US15/808,839 US10770844B2 (en) | 2016-12-14 | 2017-11-09 | Leakage current protection device for power plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689854.9A CN109390730B (en) | 2017-08-14 | 2017-08-14 | Leakage protection plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109390730A CN109390730A (en) | 2019-02-26 |
| CN109390730B true CN109390730B (en) | 2024-02-27 |
Family
ID=65416643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710689854.9A Active CN109390730B (en) | 2016-12-14 | 2017-08-14 | Leakage protection plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109390730B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110223886A (en) * | 2019-07-16 | 2019-09-10 | 深圳市南岛机电有限公司 | Waterproof electricity leakage protector |
| CN113783013A (en) * | 2021-09-09 | 2021-12-10 | 常熟市微尘电器有限公司 | Leakage protection plug and assembly process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2453792A1 (en) * | 2002-12-30 | 2004-06-30 | Leviton Manufacturing Co., Inc. | A gfci without bridge contacts and having means for automatically blocking a face opening of a protected receptacle when tripped |
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| CN103078198A (en) * | 2011-10-25 | 2013-05-01 | 苏州益而益电器制造有限公司 | Plug-type residual current circuit breaker |
| WO2016059430A1 (en) * | 2014-10-17 | 2016-04-21 | Hawker Siddeley Switchgear Limited | Circuit breaker with coil for arc displacement |
| CN206401650U (en) * | 2016-12-31 | 2017-08-11 | 上海路美思电气有限公司 | A kind of earth leakage protective converter |
| CN207082657U (en) * | 2017-08-14 | 2018-03-09 | 苏州益而益电器制造有限公司 | Leakage protecting plug |
-
2017
- 2017-08-14 CN CN201710689854.9A patent/CN109390730B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2453792A1 (en) * | 2002-12-30 | 2004-06-30 | Leviton Manufacturing Co., Inc. | A gfci without bridge contacts and having means for automatically blocking a face opening of a protected receptacle when tripped |
| CN200965956Y (en) * | 2006-10-23 | 2007-10-24 | 上海益而益电器制造有限公司 | Electrical leakage protective power supply plug |
| CN101478099A (en) * | 2008-01-04 | 2009-07-08 | 创奇科技有限公司 | Neutral grounding fault creepage protecting plug |
| CN201163686Y (en) * | 2008-01-11 | 2008-12-10 | 黄华道 | Electric power plug having earth leakage protective function |
| CN101483297A (en) * | 2008-01-11 | 2009-07-15 | 黄华道 | Electric power plug with leakage protection function |
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| CN201639103U (en) * | 2009-11-25 | 2010-11-17 | 漳州马可电器科技有限公司 | Multifunctional adapter with earth leakage protection function |
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| CN207082657U (en) * | 2017-08-14 | 2018-03-09 | 苏州益而益电器制造有限公司 | Leakage protecting plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109390730A (en) | 2019-02-26 |
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