CN208142466U - Three pole on-off leakage protecting plugs - Google Patents
Three pole on-off leakage protecting plugs Download PDFInfo
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- CN208142466U CN208142466U CN201820478910.4U CN201820478910U CN208142466U CN 208142466 U CN208142466 U CN 208142466U CN 201820478910 U CN201820478910 U CN 201820478910U CN 208142466 U CN208142466 U CN 208142466U
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- 230000007935 neutral effect Effects 0.000 claims description 7
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- 101000611618 Homo sapiens Photoreceptor disk component PRCD Proteins 0.000 description 1
- 102100040826 Photoreceptor disk component PRCD Human genes 0.000 description 1
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Abstract
The utility model relates to a kind of three pole on-off leakage protecting plugs, feature be include shell, wiring board, mounting base, relay assembly and relay rack；Movable contact spring component, live prong structure, earth pin structure and zero line pin structure；Relay rack includes installation position, and movable contact spring component includes magnetic conduction iron plate, insulating barrier, firewire movable contact spring, ground wire movable contact spring and zero curve movable contact spring；The one end of firewire movable contact spring, ground wire movable contact spring and zero curve movable contact spring is installed on insulating barrier, the length of firewire movable contact spring, ground wire movable contact spring and zero curve movable contact spring >=18mm, the other end of firewire movable contact spring, ground wire movable contact spring and zero curve movable contact spring is corresponding with corresponding firewire stationary contact, ground wire stationary contact and with zero curve stationary contact respectively and can touch and is electrically connected；The length of ground wire movable contact spring is greater than firewire movable contact spring and zero curve movable contact spring.
Description
Technical Field
The utility model relates to a tripolar break-make earth leakage protection plug.
Background
A common three-pole on-off leakage protection Plug (PRCD) generally uses a mechanical trip device to cooperate with a monitoring circuit to control the on-off of a zero, fire and grounded three-pole power supply; in a reset working state, if a socket with a switch is used, when power failure occurs, and when ground wire is electrified (leaked) or single-phase (wire) is cut off, although the monitoring circuit with leakage protection loses a working power supply, the monitoring circuit cannot be tripped out or tripped out, namely, the power supply cannot be immediately and completely cut off, and the potential safety hazard of human body electric shock exists; the existing leakage protection plug capable of realizing the functions cannot be produced and used in batches due to the defects that a circuit is too complex and the like.
Disclosure of Invention
The utility model aims at overcoming the deficiency of the prior art and providing a more safe and simple tripolar break-make leakage protection plug of monitoring circuit, under the operating condition that resets, if use and take the switch socket, meet the power failure, meet the earth lead (leakage) or single-phase (line) outage again, should leak and protect and will drop off the trip immediately, cut off the power totally, after the circuit resumes the power supply, as long as there is no leakage fault, will resume the original operating condition that resets automatically, the earth lead closes earlier when closing, the requirement that the earth lead breaks off after the disconnection when the disconnection, meet the requirement of national standard GB 20044-2012; the circuit is simple, the structure of the original monitoring circuit is not required to be changed, batch production can be realized, and the structure is simple and compact.
In order to achieve the above object, the present invention is implemented as such, which is a three-pole on-off leakage protection plug, comprising:
a housing and a circuit board; the circuit board is arranged in the shell;
the mounting seat, the relay assembly and the relay frame; the mounting seat is mounted on the circuit board; the relay rack comprises an installation position, a live wire pin insertion position, a ground wire pin insertion position and a zero wire pin insertion position are respectively arranged on the installation position, a positioning structure and an installation structure are respectively arranged on two sides of the installation position, the installation structure is installed on the installation seat so as to fix the installation position on the installation seat, and the relay component is installed on the installation position and is positioned through the positioning structure;
a movable contact piece assembly; the movable contact piece assembly comprises a magnetic conductive plate, an insulating partition plate, a live wire movable contact piece, a ground wire movable contact piece and a zero line movable contact piece; the magnetic conductive iron plate is arranged on a magnetic conductive iron frame of the relay assembly and can swing up and down, the insulating partition plate is arranged on the magnetic conductive iron plate, and a spring of the relay assembly resets the movable contact piece assembly; one end parts of the live wire movable contact piece, the ground wire movable contact piece and the zero line movable contact piece are all installed on the insulating partition plate and are respectively and electrically connected with the alternating current live wire L, the ground wire E and the zero line N, the lengths of the live wire movable contact piece, the ground wire movable contact piece and the zero line movable contact piece are all larger than or equal to 18mm, and the length of the ground wire movable contact piece is larger than the lengths of the live wire movable contact piece and the zero line movable contact piece;
the live wire pin structure, the ground wire pin structure and the zero line pin structure are respectively electrically connected with the circuit board; the live wire pin structure comprises a live wire pin and a live wire pin extension part; the extension part of the live wire pin is inserted at the insertion position of the live wire pin, the upper end of the extension part of the live wire pin is provided with a live wire stationary contact, the lower end of the extension part of the live wire pin is electrically connected with the live wire pin, and the live wire pin extends out of the shell; the ground wire pin structure comprises a ground wire pin and a ground wire pin extension part, the ground wire pin extension part is inserted in the ground wire pin insertion position, the upper end of the ground wire pin extension part is provided with a ground wire stationary contact, the lower end of the ground wire pin extension part is electrically connected with the ground wire pin, and the ground wire pin extends out of the shell; the zero line pin structure comprises a zero line pin and a zero line pin extension part, the zero line pin extension part is inserted on the zero line pin insertion position, a zero line stationary contact is arranged at the upper end of the zero line pin extension part, the lower end of the zero line pin extension part is electrically connected with the zero line pin, and the zero line pin extends out of the shell; the other end of the live wire movable contact piece corresponds to and can be in touch electrical connection with the live wire stationary contact, the other end of the ground wire movable contact piece corresponds to and can be in touch electrical connection with the ground wire stationary contact, and the other end of the zero line movable contact piece corresponds to and can be in touch electrical connection with the zero line stationary contact; when the live wire is disconnected, the opening distance between the other end of the live wire movable contact piece and the live wire static contact, the opening distance between the other end of the ground wire movable contact piece and the ground wire static contact and the opening distance between the other end of the zero line movable contact piece and the zero line static contact are both more than or equal to 3mm, and the length of the ground wire movable contact piece is greater than that of the live wire movable contact piece and the zero line movable contact piece.
In the technical scheme, the movable contact spring assembly further comprises an insulating clamping plate; the insulation clamp plate is arranged on the insulation partition plate, one end of the live wire movable contact piece, one end of the ground wire movable contact piece and one end of the zero line movable contact piece are clamped by the insulation clamp plate, a live wire movable contact, a ground movable contact and a zero line movable contact are respectively arranged at the other end of the live wire movable contact piece, the other end of the ground movable contact piece and the other end of the zero line movable contact piece, and the live wire movable contact, the ground movable contact and the zero line movable contact respectively correspond to the live wire static contact, the ground static contact and the zero line static.
In the technical scheme, the insertion position of the live wire pin is an L-shaped slot, the horizontal part of the L-shaped slot is arranged at the bottom of the installation position, the longitudinal part of the L-shaped slot is arranged on one side of the installation position and is positioned between the two positioning structures, the extension part of the live wire pin is L-shaped and is inserted in the L-shaped slot, the end part of the horizontal part of the L-shaped slot of the insertion position of the live wire pin is provided with a live wire bending position, and the live wire bending position is adapted to the inclination of the live wire pin; the ground wire pin insertion part is an L-shaped slot, the horizontal part of the L-shaped slot is arranged at the bottom of the relay assembly mounting position, the longitudinal part of the L-shaped slot is arranged above one side of the relay assembly mounting position and is positioned between the two fixed structures, and the ground wire pin extension part is L-shaped and is inserted in the L-shaped slot; the zero line is participated in the grafting position and is "L" type slot, "L" type slot's horizontal part is established in relay subassembly installation position bottom, "L" type slot's vertical portion is established in the top of one side of relay subassembly installation position and is located between two fixed knot construct, the zero line is participated in the extension and is "L" shape and establish in "L" type slot, the zero line is participated in the tip of the horizontal part of "L" type slot of grafting position and is equipped with zero line position of buckling, zero line position of buckling suits with the inclination that the zero line was participated in.
In the technical scheme, a live wire lead welding opening is arranged on the live wire pin extension part, a ground lead welding opening is arranged on the ground pin extension part, and a zero line lead welding opening is arranged on the zero line pin extension part; and the live wire lead welding opening, the grounding lead welding opening and the zero line lead welding opening are respectively and electrically connected with the circuit board through leads.
In the technical scheme, the waterproof rubber mat also comprises a foot inserting mat and a waterproof rubber mat; the pin pad and the waterproof rubber pad are located in the shell, the pin pad is sleeved on the live wire pin, the grounding pin and the zero line pin, the upper end face of the pin pad is abutted to a relay frame, and the waterproof rubber pad is sleeved on the live wire pin, the grounding pin and the zero line pin and abutted to the lower end face of the pin pad and the shell.
In the technical scheme, the mounting base further comprises two isolation covers and a tripping frame; the two isolation covers and the trip frame are both installed on the circuit board, the live wire movable contact piece and the zero line movable contact piece are respectively located in the corresponding isolation covers to respectively separate the live wire movable contact piece, the grounding movable contact piece and the zero line movable contact piece, the two isolation covers are respectively provided with a first clasp and a connecting column, the two first clasps are both buckled on the relay frame, and the two connecting columns are fixedly connected with the relay frame through screws.
In the technical scheme, the positioning structure comprises a second hook and a third hook, the second hook and the third hook are respectively positioned at two ends of one side of the installation position, and the second hook and the third hook on two sides of the installation position are both buckled on the relay component to position the relay component; the mounting structure is an L-shaped connecting column, the two L-shaped connecting columns are located on two sides of the mounting position, and the L-shaped connecting columns are fixedly connected with the two connecting columns of the isolation cover through screws.
In the technical scheme, the device also comprises a first tripping reset elastic sheet, a second tripping reset elastic sheet and a tripping structure; the tripping structure is arranged in the tripping frame and is electrically connected with the circuit board, the left ends of the first tripping reset elastic sheet and the second tripping reset elastic sheet are arranged on the circuit board and are electrically connected, the right ends of the first tripping reset elastic sheet and the second tripping reset elastic sheet are abutted against the pressing arm of the tripping structure, the right end of the first tripping reset elastic sheet can be electrically connected or disconnected with one contact touch on the circuit board, and the right end of the second tripping reset elastic sheet can be electrically connected or disconnected with the other contact touch on the circuit board.
In the technical scheme, the tripping structure further comprises a reset key, an iron core, a small spring, a tripping coil, a tripping card and a large spring; the reset button is inserted in the trip frame and can axially move up and down, the upper end part of the reset button passes through the circuit board and extends out of the shell to form a pressing part, the reset button is provided with a limiting baffle and a positioning clamping groove, the trip coil is installed in the trip frame, and two sides of the trip frame are provided with longitudinal open chutes; the iron core and the small spring are arranged in the trip coil, the iron core can horizontally move in the trip coil, the left end of the small spring is abutted against the trip coil, the right end of the small spring is abutted against the tail end of the iron core, the narrow and long opening part at the left end of the trip card is clamped in the head annular clamping groove of the iron core and can move up and down, the press arm is positioned in the trip frame, the press arm is sleeved on the reset button and can relatively move up and down, the middle part of the press arm is provided with a socket, the right square opening of the trip card is clamped in the socket, and when the trip card pushes the iron core to move forward along with the elasticity of the small spring, the right square opening of the trip card can be clamped into the positioning clamping groove and the socket to enable the reset button and the; the lower end of the large spring is abutted against the bottom of the tripping frame, the upper end of the large spring is abutted against the tail part of the reset button, and the two arms of the pressing arm can move up and down in the open sliding groove; the first tripping reset elastic sheet and the second tripping reset elastic sheet are respectively abutted against two arms of the pressing arm.
Compared with the prior art, the utility model the advantage do: under the reset working state, if a socket with a switch is used, when power failure occurs, and when the ground wire is electrified (leaked) or the single-phase (wire) is cut off, the leakage protector can be immediately tripped and tripped, the power supply is completely cut off, after the circuit recovers power supply, the original reset working state can be automatically recovered as long as no leakage fault exists, the opening distances between the live wire movable contact, the grounding movable contact and the zero line movable contact and the corresponding static contacts are more than or equal to 3mm, the requirements that the ground wire is firstly closed and then disconnected when the ground wire is closed are met, and the national standard GB20044-2012 requirement is met; the circuit is simple, the structure of the original monitoring circuit is not required to be changed, batch production can be realized, and the structure is simple and compact.
Drawings
Fig. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the present invention with the outer shell removed;
FIG. 3 is a top view of FIG. 2
FIG. 4 is a cross-sectional view taken along line A-A of the relay of FIG. 3 when energized;
FIG. 5 is a cross-sectional view taken along line A-A of the relay of FIG. 3 when disconnected;
FIG. 6 is a perspective view of the present invention with the housing and the circuit board removed;
fig. 7 is a perspective view of the trip mechanism and mounting block of fig. 6 with the trip mechanism removed;
FIG. 8 is a perspective view of the left view bit of FIG. 7;
fig. 9 is a front perspective view of the present invention with the outer shell removed;
fig. 10 is a perspective view of the relay stand according to the present invention;
fig. 11 is a perspective view of the relay frame according to the present invention;
fig. 12 is a perspective view of the shield of the present invention;
fig. 13 is a perspective view of the bottom of the cage of the present invention;
fig. 14 is a perspective view of the live wire pin structure of the present invention;
figure 15 is a perspective view of the neutral pin configuration of the present invention.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 15, it is a three-pole on-off leakage protection plug, which includes a housing 1, a circuit board 2, a mounting base 3, a relay assembly 4, a relay frame 5, a movable contact assembly 6, a live wire pin structure, a ground wire pin structure and a zero wire pin structure electrically connected to the circuit board respectively; wherein,
the circuit board 2 is arranged in the shell 1;
the mounting seat 3 is mounted on the circuit board 2; the relay frame 5 comprises a mounting position 54, a live wire pin insertion position 51, a ground wire pin insertion position 52 and a zero wire pin insertion position 53 are respectively arranged on the mounting position 54, positioning structures 55 and mounting structures 56 are respectively arranged on two sides of the mounting position 54, the mounting structures 56 are mounted on the mounting base 3 so as to fix the mounting position 54 on the mounting base 3, and the relay assembly 4 is mounted on the mounting position 54 and is positioned through the positioning structures 55;
the movable contact piece assembly 6 comprises a magnet guide plate 61, an insulating partition plate 62, a live wire movable contact piece 64, a ground wire movable contact piece 65 and a zero line movable contact piece 66; the magnet guide plate 61 is mounted on the magnet guide iron frame 41 of the relay assembly 4 and can swing up and down, the insulating partition plate 62 is mounted on the magnet guide plate 61, and the spring 42 of the relay assembly 4 enables the movable contact piece assembly 6 to reset; one end parts of the live wire movable contact piece 64, the ground wire movable contact piece 65 and the zero line movable contact piece 66 are all arranged on the insulating partition plate 62 and are respectively and electrically connected with the live wire L, the ground wire E and the zero line N, so that the live wire movable contact piece 64, the ground wire movable contact piece 65 and the zero line movable contact piece 66 can swing up and down along with the magnet guide plate 61, the lengths of the live wire movable contact piece 64, the ground wire movable contact piece 65 and the zero line movable contact piece 66 are all more than or equal to 18mm, and the length of the ground wire movable contact piece 65 is more than the lengths of the live wire movable contact piece 64;
the live wire pin structure comprises a live wire pin 71 and a live wire pin extension 72; the live wire pin extension part 72 is inserted into the live wire pin insertion position 51 so as to position the live wire pin structure, a live wire stationary contact 73 is arranged at the upper end of the live wire pin extension part 72, the lower end of the live wire pin extension part 72 is electrically connected with the live wire pin 71, and the live wire pin 71 extends out of the shell 1; the ground wire pin structure comprises a ground wire pin 81 and a ground wire pin extension part 82, the ground wire pin extension part 82 is inserted on the ground wire pin insertion position 52 so as to position the ground wire pin structure, a ground wire stationary contact 83 is arranged at the upper end of the ground wire pin extension part 82, the lower end of the ground wire pin extension part 82 is electrically connected with the ground wire pin 81, and the ground wire pin 81 extends out of the shell 1; the zero wire pin structure comprises a zero wire pin 91 and a zero wire pin extension part 92, the zero wire pin extension part 92 is inserted on the zero wire pin insertion position 53, so that the zero wire pin structure is positioned, a zero wire stationary contact 93 is arranged at the upper end of the zero wire pin extension part 92, the lower end of the zero wire pin extension part 92 is electrically connected with the zero wire pin 91, and the zero wire pin 91 extends out of the shell 1; the other end of the live wire movable contact piece 64 corresponds to and can be in touch electrical connection with the live wire fixed contact 73, the other end of the ground wire movable contact piece 65 corresponds to and can be in touch electrical connection with the ground wire fixed contact 83, and the other end of the zero wire movable contact piece 66 corresponds to and can be in touch electrical connection with the zero wire fixed contact 93; when the three-pole protection circuit is disconnected, the opening distance between the other end of the live wire movable contact piece 64 and the live wire fixed contact 73, the opening distance between the other end of the ground wire movable contact piece 65 and the ground wire fixed contact 83 and the opening distance between the other end of the zero line movable contact piece 66 and the zero line fixed contact 93 are both more than or equal to 3mm, and the length of the ground wire movable contact piece 65 is greater than that of the live wire movable contact piece 64 and the zero line movable contact piece 66, so that the purpose of three-pole protection is. One end of a spring 42 of the relay assembly 4 is connected with a magnetic iron frame 41, and the other end of the spring 41 is connected with a magnetic iron plate 61; the live pin 71, the ground pin 81 and the neutral pin 91 are fixed to the housing 1.
When the leakage protection plug is used, due to the relay frame, under the condition that the opening distances of the live wire movable contact piece 64, the ground wire movable contact piece 65 and the zero line movable contact piece 66 are larger than or equal to 3mm, the structural problems of mutual isolation and insulation between the leakage protection plug pin and a relay metal piece and the like are solved, the relay is easily arranged in the leakage protection plug, the structure is compact, the circuit is simple, and batch production can be realized. Because the length of the ground wire movable contact spring 65 is greater than the lengths of the live wire movable contact spring 64 and the zero line movable contact spring 66, the requirements that the ground wire is firstly closed when being closed and then is disconnected when being disconnected are met.
When the relay assembly is in a normal power-on working state, the relay assembly 4 is powered on and drives the magnet guide plate 6 to swing downwards, the live wire movable contact piece 64 is electrically connected with the live wire static contact 73, the zero line movable contact piece 66 is electrically connected with the zero line static contact 93, and the ground wire movable contact piece 65 is electrically connected with the ground wire static contact 83, so that the purpose of normal power-on is achieved.
When the relay assembly 4 is in a leakage state, the relay assembly is powered off and drives the magnet guide plate 6 to swing upwards, the live wire movable contact piece 64 is disconnected with the live wire fixed contact 73, and the zero wire movable contact piece 66 is disconnected with the zero wire fixed contact 93, so that the power-off effect is achieved, and the safety of a user is protected.
In this embodiment, the moving contact assembly 6 further includes an insulating clamp 63; the insulating clamp plate 63 is mounted on the insulating partition plate 62, the insulating clamp plate 63 clamps one end of the live wire movable contact piece 64, the ground wire movable contact piece 65 and the zero line movable contact piece 66, the other end of the live wire movable contact piece 64, the other end of the ground movable contact piece 65 and the other end of the zero line movable contact piece 66 are respectively provided with a live wire movable contact 641, a ground movable contact 651 and a zero line movable contact 661, and the live wire movable contact 641, the ground movable contact 651 and the zero line movable contact 661 respectively correspond to the live wire static contact 73, the ground static contact 83 and the zero line static contact 93.
In this embodiment, the insertion position 51 of the live wire pin is an "L" shaped slot, the horizontal portion of the "L" shaped slot is disposed at the bottom of the installation position 54, the longitudinal portion of the "L" shaped slot is disposed on one side of the installation position 54 and located between the two positioning structures 55, the extension portion 72 of the live wire pin is "L" shaped and inserted in the "L" shaped slot, the end of the horizontal portion of the "L" shaped slot of the insertion position 51 of the live wire pin is provided with a live wire bending position 511, and the inclination of the live wire bending position 511 is adapted to the inclination of the live wire pin 71; the ground pin insertion position 52 is an L-shaped slot, the horizontal part of the L-shaped slot is arranged at the bottom of the relay assembly mounting position 54, the longitudinal part of the L-shaped slot is arranged above one side of the relay assembly mounting position 54 and between the two fixing structures 55, and the ground pin extension part 82 is L-shaped and inserted in the L-shaped slot; the zero wire pin insertion position 53 is an L-shaped slot, the horizontal part of the L-shaped slot is arranged at the bottom of the relay component mounting position 54, the longitudinal part of the L-shaped slot is arranged above one side of the relay component mounting position 54 and is positioned between the two fixing structures 55, the zero wire pin extension part 92 is L-shaped and is inserted in the L-shaped slot, the end part of the horizontal part of the L-shaped slot of the zero wire pin insertion position 53 is provided with a zero wire bending position 531, and the zero wire bending position 531 is adapted to the inclination of the zero wire pin 91.
In this embodiment, the power pin extension 72 is provided with a power pin welding opening 74, the ground pin extension 82 is provided with a ground pin welding opening 84, and the neutral pin extension 92 is provided with a neutral pin welding opening 94; the live wire lead welding opening 74, the ground wire lead welding opening 84, and the neutral wire lead welding opening 94 are electrically connected to the circuit board 2 through leads, respectively.
In this embodiment, the present invention further includes a foot inserting pad 13 and a waterproof rubber pad 14; the pin inserting pad 13 and the waterproof rubber pad 14 are located in the shell 1, the pin inserting pad 13 is sleeved on the live wire pin 71, the grounding pin 81 and the zero wire pin 91, the upper end face of the pin inserting pad 13 is abutted to the relay frame 5, and the waterproof rubber pad 14 is sleeved on the live wire pin 7, the grounding pin 8 and the zero wire pin 9 and abutted to the lower end face of the pin inserting pad 13 and the shell 1 respectively.
In this embodiment, the mounting base 3 further includes two isolation covers 31 and a trip frame 32; the two isolation covers 31 and the tripping frame 32 are both installed on the circuit board 2, the live wire moving contact piece 64 and the zero wire moving contact piece 66 are respectively positioned in the respective isolation covers 31 so as to respectively separate the live wire moving contact piece 64, the grounding moving contact piece 65 and the zero wire moving contact piece 66, the two isolation covers 31 are respectively provided with a first clasp 312 and a connecting column 313, the two first clasps 312 are both buckled on the relay frame 5, and the two connecting columns 313 are fixedly connected with the relay frame 5 through screws.
In this embodiment, the positioning structure 55 includes a second hook 551 and a third hook 552, the second hook 551 and the third hook 552 are respectively located at two ends of one side of the mounting position 54, and the second hook 551 and the third hook 552 are both buckled on the relay assembly 4 to position the relay assembly 4; the mounting structure 56 is an L-shaped connecting column, the two L-shaped connecting columns are located at two sides of the mounting position 54, and the L-shaped connecting columns are fixedly connected with the two connecting columns 313 of the isolation cover 31 through screws.
In this embodiment, the device further includes a first trip reset spring 10, a second trip reset spring 11 and a trip structure 12; the tripping structure 10 is installed in the tripping frame 32 and electrically connected to the circuit board 2, the left ends of the first tripping reset spring 10 and the second tripping reset spring 11 are installed on the circuit board 2 and electrically connected, the right ends of the first tripping reset spring 10 and the second tripping reset spring 11 are abutted against the pressing arm 126 of the tripping structure 12, the right end of the first tripping reset spring 10 can be electrically connected or disconnected with a contact on the circuit board 2 in a touching manner, and the right end of the second tripping reset spring 11 can be electrically connected or disconnected with another contact on the circuit board 2 in a touching manner.
In this embodiment, the trip structure 12 further includes a reset button 121, an iron core 122, a small spring 123, a trip coil 124, a trip card 125, and a large spring 127; the reset key 121 is inserted into the trip frame 32 and can axially move up and down, the upper end of the reset key 121 passes through the circuit board 2 and extends out of the shell 1 to form a pressing part, the reset key 121 is provided with a limit baffle 1211 and a positioning clamping groove 1212, the trip coil 124 is installed in the trip frame 32, and two sides of the trip frame 32 are provided with longitudinal opening sliding grooves 321; the iron core 122 and the small spring 123 are both arranged in the trip coil 124, the iron core 122 can horizontally move in the trip coil 124, the left end of the small spring 123 abuts against the trip coil 124, the right end of the small spring 123 abuts against the tail end of the iron core 122, the narrow and long opening part at the left end of the trip card 125 is clamped in the head annular clamping groove of the iron core 122 and can move up and down, the pressing arm 126 is positioned in the trip frame 32, the pressing arm 126 is sleeved on the reset key 121 and can move up and down relatively, the middle part of the pressing arm 126 is provided with a socket 1262, the right square opening of the trip card 125 is clamped in the socket 1262, and when the trip card 125 pushes the iron core 122 to move forward along with the elastic force of the small spring 123, the right square opening of the trip card 125 can be clamped in the positioning clamping groove 1212 and the socket 1262 to enable the reset key 121 and; the lower end of the big spring 127 abuts against the bottom of the trip frame 32, the upper end of the big spring 127 abuts against the tail part of the reset button 121, and the two arms of the press arm can move up and down in the opening sliding groove 321; the first trip reset spring 10 and the second trip reset spring 11 respectively abut against two arms of the pressing arm 126.
When the trip coil is in a power-off state, the trip coil is not powered on, the iron core 122 moves rightwards under the pulling force of the small spring 123, the trip blocking piece 125 is separated from the positioning clamping groove 1212, the large spring 127 pushes the reset key 121 to move upwards, the pressing arm 126 and the trip blocking piece 125 move downwards, and the first trip reset elastic piece 10 and the second trip reset elastic piece 11 swing downwards, so that the power-off effect is achieved, and the safety of a user is protected.
The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention.
Claims (8)
1. A three-pole on-off leakage protection plug, comprising:
a shell (1) and a circuit board (2); the circuit board (2) is arranged in the shell (1);
the relay device comprises a mounting seat (3), a relay assembly (4) and a relay frame (5); the mounting seat (3) is mounted on the circuit board (2), and the mounting seat (3) comprises two isolation covers (31) and a tripping frame (32); the two isolation covers (31) and the trip frame (32) are both arranged on the circuit board (2), the two isolation covers (31) are both provided with first clasps (312) and connecting columns (313), the two first clasps (312) are both buckled on the relay frame (5), and the two connecting columns (313) are fixedly connected with the relay frame (5) through screws; the relay frame (5) comprises a mounting position (54), a live wire pin insertion position (51), a ground wire pin insertion position (52) and a zero wire pin insertion position (53) are respectively arranged on the mounting position (54), positioning structures (55) and mounting structures (56) are respectively arranged on two sides of the mounting position (54), the mounting structures (56) are mounted on the mounting seat (3) through fasteners so as to fix the mounting position (54) on the mounting seat (3), and the relay assembly (4) is mounted on the mounting position (54) and is positioned through the positioning structures (55);
a movable contact piece assembly (6); the movable contact piece assembly (6) comprises a magnet guide plate (61), an insulating partition plate (62), a live wire movable contact piece (64), a ground wire movable contact piece (65) and a zero line movable contact piece (66); the magnetic guide plate (61) is arranged on a magnetic guide iron frame (41) of the relay assembly (4) and can swing up and down, the insulating partition plate (62) is arranged on the magnetic guide plate (61), and the spring (42) of the relay assembly (4) enables the movable contact piece assembly (6) to reset; one end parts of the live wire movable contact piece (64), the ground wire movable contact piece (65) and the zero line movable contact piece (66) are all arranged on the insulating partition plate (62) and are respectively and electrically connected with the live wire L, the ground wire E and the zero line N, the lengths of the live wire movable contact piece (64), the ground wire movable contact piece (65) and the zero line movable contact piece (66) are all more than or equal to 18mm, and the length of the ground wire movable contact piece (65) is greater than the lengths of the live wire movable contact piece (64) and the zero line movable contact piece (66); the live wire movable contact piece (64) and the zero wire movable contact piece (66) are respectively positioned in the corresponding isolation cover (31) so as to respectively separate the live wire movable contact piece (64), the grounding movable contact piece (65) and the zero wire movable contact piece (66);
the live wire pin structure, the ground wire pin structure and the zero line pin structure are respectively electrically connected with the circuit board; the live wire pin structure comprises a live wire pin (71) and a live wire pin extension part (72); the live wire pin extension part (72) is inserted in the live wire pin insertion position (51), a live wire stationary contact (73) is arranged at the upper end of the live wire pin extension part (72), the lower end of the live wire pin extension part (72) is electrically connected with the live wire pin (71), and the live wire pin (71) extends out of the shell (1); the ground wire pin structure comprises a ground wire pin (81) and a ground wire pin extension part (82), the ground wire pin extension part (82) is inserted in the ground wire pin insertion position (52), a ground wire stationary contact (83) is arranged at the upper end of the ground wire pin extension part (82), the lower end of the ground wire pin extension part (82) is electrically connected with the ground wire pin (81), and the ground wire pin (81) extends out of the shell (1); the zero wire pin structure comprises a zero wire pin (91) and a zero wire pin extension part (92), the zero wire pin extension part (92) is inserted on the zero wire pin insertion position (53), a zero wire stationary contact (93) is arranged at the upper end of the zero wire pin extension part (92), the lower end of the zero wire pin extension part (92) is electrically connected with the zero wire pin (91), and the zero wire pin (91) extends out of the shell (1); the other end of the live wire movable contact piece (64) corresponds to the live wire fixed contact (73) and can be in touch and electric connection, the other end of the ground wire movable contact piece (65) corresponds to the ground wire fixed contact (83) and can be in touch and electric connection, and the other end of the zero wire movable contact piece (66) corresponds to the zero wire fixed contact (93) and can be in touch and electric connection; when the live wire is disconnected, the distance between the other end of the live wire movable contact piece (64) and the live wire static contact (73), the distance between the other end of the ground wire movable contact piece (65) and the ground wire static contact (83), and the distance between the other end of the zero wire movable contact piece (66) and the zero wire static contact (93) are both more than or equal to 3mm, and the length of the ground wire movable contact piece (65) is greater than that of the live wire movable contact piece (64) and the zero wire movable contact piece (66).
2. A three-pole make-and-break earth leakage protection plug as claimed in claim 1, characterized in that said movable contact assembly (6) further comprises an insulating clamping plate (63); the insulation clamp plate (63) is arranged on the insulation partition plate (62), the insulation clamp plate (63) clamps one end of the live wire movable contact piece (64), the ground wire movable contact piece (65) and the zero line movable contact piece (66), the other end of the live wire movable contact piece (64), the ground wire movable contact piece (65) and the other end of the zero line movable contact piece (66) are respectively provided with a live wire movable contact (641), a grounding movable contact (651) and a zero line movable contact (661), and the live wire movable contact (641), the grounding movable contact (651) and the zero line movable contact (661) respectively correspond to the live wire fixed contact (73), the grounding fixed contact (83) and the zero line fixed contact (93).
3. The earth leakage protection plug as claimed in claim 1, wherein the insertion site (51) for the live wire pin is an "L" shaped slot, the horizontal part of the "L" shaped slot is disposed at the bottom of the installation site (54), the longitudinal part of the "L" shaped slot is disposed at one side of the installation site (54) and between the two positioning structures (55), the extension part (72) for the live wire pin is "L" shaped and inserted in the "L" shaped slot, a bending site (511) for the live wire is disposed at the end of the horizontal part of the "L" shaped slot of the insertion site (51) for the live wire pin, and the bending site (511) for the live wire is adapted to the inclination of the live wire pin (71); the ground wire pin insertion position (52) is an L-shaped slot, the horizontal part of the L-shaped slot is arranged at the bottom of the relay assembly mounting position (54), the longitudinal part of the L-shaped slot is arranged above one side of the relay assembly mounting position (54) and is positioned between the two positioning structures (55), and the ground wire pin extension part (82) is L-shaped and inserted in the L-shaped slot; the zero line pin inserting position (53) is an L-shaped slot, the horizontal part of the L-shaped slot is arranged at the bottom of the relay assembly mounting position (54), the longitudinal part of the L-shaped slot is arranged above one side of the relay assembly mounting position (54) and is positioned between the two positioning structures (55), the zero line pin extending part (92) is L-shaped and is inserted in the L-shaped slot, the end part of the horizontal part of the L-shaped slot of the zero line pin inserting position (53) is provided with a zero line bending position (531), and the zero line bending position (531) is adapted to the inclination of the zero line pin (91).
4. The three pole make and break earth leakage protection plug of claim 1, wherein said live prong extension (72) is provided with a live lead weld opening (74), said ground prong extension (82) is provided with a ground lead weld opening (84), and said neutral prong extension (92) is provided with a neutral lead weld opening (94); the live wire lead welding opening (74), the grounding lead welding opening (84) and the zero wire lead welding opening (94) are electrically connected with the circuit board (2) through leads respectively.
5. The three-pole make-and-break earth leakage protection plug according to claim 1, further comprising a plug foot pad (13) and a waterproof rubber pad (14); insert callus on the sole (13) and waterproof cushion (14) and be located shell (1), insert callus on the sole (13) suit on live wire is participated in (71), ground wire is participated in (81) and zero line and is participated in (91), insert the up end and relay frame (5) of callus on the sole (13) and support and lean on, waterproof cushion (14) suit is participated in (7) are participated in to live wire, ground connection is participated in (8) and zero line and is participated in and support and lean on and support lower terminal surface and shell (1) the counterbalance that inserts callus on the sole (13) respectively.
6. The earth leakage protection plug according to claim 1, characterized in that the positioning structure (55) comprises a second hook (551) and a third hook (552), the second hook (551) and the third hook (552) are respectively located at two ends of one side of the mounting location (54), and the second hook (551) and the third hook (552) at two sides of the mounting location (54) are buckled on the relay assembly (4) to position the relay assembly (4); the mounting structure (56) is an L-shaped connecting column, the two L-shaped connecting columns are located on two sides of the mounting position (54), and the L-shaped connecting columns are fixedly connected with the two connecting columns (313) of the isolation cover (31) through screws.
7. The leakage protection plug according to claim 1, further comprising a first trip reset spring (10), a second trip reset spring (11) and a trip structure (12); the tripping structure (12) is installed in the tripping frame (32) and is electrically connected with the circuit board (2), the left ends of the first tripping reset elastic sheet (10) and the second tripping reset elastic sheet (11) are installed on the circuit board (2) and are electrically connected, the right ends of the first tripping reset elastic sheet (10) and the second tripping reset elastic sheet (11) are abutted against the pressing arm (126) of the tripping structure (12), the right end of the first tripping reset elastic sheet (10) can be electrically connected or disconnected with a contact touch on the circuit board (2), and the right end of the second tripping reset elastic sheet (11) can be electrically connected or disconnected with another contact touch on the circuit board (2).
8. The earth leakage protection plug according to claim 7, characterized in that said trip mechanism (12) further comprises a reset button (121), an iron core (122), a small spring (123), a trip coil (124), a trip card (125) and a large spring (127); the reset key (121) is inserted into the trip frame (32) and can axially move up and down, the upper end part of the reset key (121) penetrates through the circuit board (2) and extends out of the shell (1) to form a pressing part, the reset key (121) is provided with a limit baffle (1211) and a positioning clamping groove (1212), the trip coil (124) is installed in the trip frame (32), and two sides of the trip frame (32) are provided with longitudinal opening sliding chutes (321); iron core (122) and little spring (123) all are established in trip coil (124), but iron core (122) horizontal migration in trip coil (124), and the left end of little spring (123) is supported and is leaned on trip coil (124), and the right-hand member of little spring (123) is supported and is leaned on iron core (122) tail end, the narrow long opening card of trip card (125) left end is established in the head ring type draw-in groove of iron core (122) and can reciprocate, press arm (126) are located trip frame (32), press arm (126) cover establish on reset button (121) and can reciprocate relatively, be equipped with socket (1262) in the middle part of press arm (126), the square opening card in the right part of trip card (125) is established in socket (1262), when trip card (125) promotes iron core (122) along with the elasticity of little spring (123) and moves forward, the square opening card in the right part of card trip (125) can block in location draw-in groove (1212) and socket (1262) and make reset button (121) and press arm (126) for reset button (121) for the socket (1262) Integral; the lower end of the big spring (127) is abutted against the bottom of the tripping frame (32), the upper end of the big spring (127) is abutted against the tail part of the reset button (121), and the two arms of the pressing arm can move up and down in the opening sliding groove (321); the first tripping reset elastic sheet (10) and the second tripping reset elastic sheet (11) are respectively abutted against two arms of the pressing arm (126).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820478910.4U CN208142466U (en) | 2018-04-07 | 2018-04-07 | Three pole on-off leakage protecting plugs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820478910.4U CN208142466U (en) | 2018-04-07 | 2018-04-07 | Three pole on-off leakage protecting plugs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208142466U true CN208142466U (en) | 2018-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820478910.4U Active CN208142466U (en) | 2018-04-07 | 2018-04-07 | Three pole on-off leakage protecting plugs |
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| Country | Link |
|---|---|
| CN (1) | CN208142466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461996A (en) * | 2018-04-07 | 2018-08-28 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plugs |
-
2018
- 2018-04-07 CN CN201820478910.4U patent/CN208142466U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461996A (en) * | 2018-04-07 | 2018-08-28 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plugs |
| CN108461996B (en) * | 2018-04-07 | 2023-09-22 | 佛山市顺德区信辉达电子有限公司 | Tripolar on-off leakage protection plug |
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