CN111200202A - One-set one-electrode safety socket plug - Google Patents

One-set one-electrode safety socket plug Download PDF

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Publication number
CN111200202A
CN111200202A CN201811370813.4A CN201811370813A CN111200202A CN 111200202 A CN111200202 A CN 111200202A CN 201811370813 A CN201811370813 A CN 201811370813A CN 111200202 A CN111200202 A CN 111200202A
Authority
CN
China
Prior art keywords
plug
socket
pole
hole
positive
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.)
Pending
Application number
CN201811370813.4A
Other languages
Chinese (zh)
Inventor
顾煜
王虎
顾沅麟
顾山红
王丹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suqian Gushifu Lock Industry Co ltd
Original Assignee
Suqian Gushifu Lock Industry Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suqian Gushifu Lock Industry Co ltd filed Critical Suqian Gushifu Lock Industry Co ltd
Priority to CN201811370813.4A priority Critical patent/CN111200202A/en
Publication of CN111200202A publication Critical patent/CN111200202A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/15Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/04Pins or blades for co-operation with sockets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/502Bases; Cases composed of different pieces
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/005Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure requiring successive relative motions to complete the coupling, e.g. bayonet type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00Connectors or connections adapted for particular applications
    • H01R2201/26Connectors or connections adapted for particular applications for vehicles

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  • Connector Housings Or Holding Contact Members (AREA)

Abstract

The invention relates to a set of view-one-pole safety socket plug, which consists of a view-one-pole safety socket and a view-one-pole safety plug, and is characterized in that: the first-pole safety socket is provided with an exposed socket visible positive pole and a socket hidden negative pole; a visible negative electrode of the exposed plug is arranged on the visible one-pole safety plug; a plug hiding anode is arranged; the beneficial effects are that: the storage battery and the electric appliance are protected, the service life of the storage battery and the electric appliance is prolonged, and the safety performance is improved; the plug and the socket are easy and labor-saving to insert and pull, the service life of the plug and the socket is prolonged, and the safety performance of the plug and the socket is improved.

Description

One-set one-electrode safety socket plug
Technical Field
The invention relates to a power supply connecting device, in particular to a set of one-pole safety socket and plug.
Background
After the storage battery car uses a period, the elasticity of the clamping piece in the plug socket can lose, and the reason of wearing and tearing leads to plug socket to have contact failure's phenomenon to also strike sparks the phenomenon, have the damage to the storage battery simultaneously, reduce the storage battery life of storage battery car.
The media often report that the socket of the battery car damages children, and children hold metallic things such as coins, keys and the like and put into the socket of the battery car, so that the positive pole and the negative pole are connected to form an electric shock phenomenon, a large amount of heat energy and flame are generated, and great damage is brought to the children.
In conclusion, the problems of poor contact and child injury of the socket plug of the battery car are solved when the accident is not slow, so that a set of one-view-one-pole safety socket plug is successfully researched and developed through long-time investigation and research, the hidden danger and the defects of the product can be completely solved, the service lives of the socket and the plug are prolonged, and the plugging and unplugging are easy and labor-saving. Therefore, the service life of the socket plug is determined without depending on the elasticity of the metal of the socket.
Disclosure of Invention
In order to solve the defects and shortcomings in the technical background, the invention provides a set of one-pole safety socket plug, which can only see one-pole safety socket plug, can solve the problems of elasticity loss after a clamping piece in a socket plug is used for a period of time, ignition phenomenon of poor contact of the socket plug caused by abrasion, prolongs the service life and solves the problem of labor waste in plugging and unplugging the socket plug, particularly a new socket plug.
The technical scheme for solving the technical problem is as follows: one set of safety socket and plug capable of seeing only one pole; the socket comprises an anode and a cathode in the socket and an anode and a cathode in the plug, and is characterized in that the socket comprises a socket insulator, a visible anode, a hidden cathode, a cathode power line, a cathode spring, an outer wall fixing insulating layer, an anode power line and an anode groove; the plug consists of a plug visible negative pole, a plug negative pole groove, a plug hidden positive pole, a plug positive pole spring, a plug positive pole power line, a plug negative pole power line and a plug insulator; the positive pole hole, the negative pole hole, the socket hiding negative pole hole, the socket negative pole side hole and the positive pole power supply wire hole are arranged in the socket; a visible positive electrode is arranged in the positive electrode hole of the socket, one end of the visible positive electrode is tightly connected with a positive electrode power line, and the other end of the visible positive electrode is provided with a positive electrode groove; the socket negative pole hole is communicated with the socket hidden negative pole hole, and the socket negative pole side hole is communicated with the socket hidden negative pole hole; a socket hidden negative electrode is arranged in the socket hidden negative electrode hole, one end of the hidden negative electrode is provided with a negative electrode spring, the other end of the hidden negative electrode is intersected with the socket negative electrode hole, the hidden negative electrode is in contact with the visible negative electrode of the plug at any time, when the visible negative electrode of the plug enters the socket hidden negative electrode hole, the plug negative electrode groove is in close contact with the socket hidden negative electrode, the hidden negative electrode in the socket pushes against the plug negative electrode groove, and the plug negative electrode groove and the socket hidden negative electrode are worn for a long time under the action of the negative; a socket negative power line, a socket power line connector and a socket side hole spring are arranged in the socket negative side hole, one end of the socket negative power line connector is contacted with the hidden negative electrode, the other end of the socket negative power line connector is contacted with the socket power negative line, the socket negative power line connector is contacted with the hidden negative electrode under the action of the side hole spring, and the socket negative power line connector and the hidden negative electrode are worn for a long time without generating poor contact or loosening; the plug is arranged in the hidden positive pole hole, the hidden positive pole of the plug is installed, one end of the hidden positive pole is provided with a plug positive pole spring, the other end of the hidden positive pole is intersected in the plug positive pole hole and is in contact with the visible positive pole on the socket at any time, when the visible positive pole of the socket enters the hidden positive pole hole of the plug, the hidden positive pole of the plug can prop against the positive pole groove on the socket, under the action of the plug positive pole spring, the hidden positive pole of the plug props against the positive pole groove of the socket, and the phenomenon of poor contact or looseness cannot occur after long-term; the plug positive power line connector is mounted in the plug positive power line hole, a plug side hole spring is arranged at one end of the plug positive power line connector, one end of the plug positive power line connector is in hidden positive contact with the plug, the plug positive power line connector is in hidden positive contact with the plug under the action of the plug side hole spring, the plug positive power line connector pushes against the plug to hide the positive electrode, and the phenomenon of poor contact or looseness cannot occur after long-term use and abrasion.
The visible positive pole on the socket is arranged in the positive pole hole of the socket, enters the positive pole hole of the plug in the plug and is in contact with the hidden positive pole of the plug, and the hidden positive pole props against the positive pole groove of the socket to form positive pole power connection.
The visible negative pole on the plug is arranged in the negative pole hole of the plug and enters the negative pole hole of the socket to be in contact with the hidden negative pole of the socket, and the hidden negative pole in the socket pushes against the visible negative pole groove of the plug to form negative pole power connection.
The socket hides the negative pole, installs in socket hides the negative pole downthehole, contacts with the negative pole power cord connector in the socket, and the negative pole power is connected the negative pole power cord once more.
The plug hides the positive pole, installs in the plug hides anodal downthehole, with anodal power cord joint contact in the plug, anodal power is connected the anodal power cord again.
One of the poles in the socket is hidden and hidden in the negative pole hole, which is through.
The visible positive pole in the socket is fixed, and the hidden negative pole is movable.
The visible negative pole in the plug is fixed, and the hidden positive pole is movable.
The socket is characterized in that the socket outer wall fixing layer is provided with symmetrical screw holes corresponding to mounting holes in the battery car, and the socket is fixed on the battery car.
The socket shell is sleeved on the outer wall of the socket insulator and seals the socket cathode spring and the socket side hole spring from falling off.
The plug shell is sleeved on the plug insulator and seals the plug anode spring and the plug side hole spring from falling.
The invention relates to a technology of a one-pole safe socket plug, which solves the problems of poor contact caused by insertion and pulling abrasion of the positive pole and the positive pole of the socket plug and loss of elasticity of a clamping piece, and insertion and pulling abrasion of the negative pole and the negative pole of the socket plug and loss of elasticity of the clamping piece; the socket plug solves the problem of labor waste in inserting and pulling the socket plug, the elastic object spring is exclusively used as the 'clamping piece' elastic force, and under the action of the spring power, the phenomena of elastic loss and poor abrasion contact of the positive clamping piece and the negative clamping piece of the socket plug in front of the socket plug are solved. The invention is successful, and the service life of the socket plug is determined without relying on the elasticity of the clamping piece of the socket plug. One pole of the socket and the plug is fixed, the other pole of the socket and the plug is movable, and the fixed pole of the socket is a visible positive pole which is matched with the movable pole of the plug in a hidden positive pole; the fixed pole on the plug is a visible negative pole and is matched with the movable pole in the socket by a hidden negative pole; the movable pole must be matched with the elastic object spring to achieve the purpose of avoiding poor contact and ignition for a long time, and the movable pole is easy to insert and pull and saves labor. The negative pole in the socket is hidden to hide in the negative pole hole is penetrating, can select the positive pole equally, as penetrating hole, the metal object is big can not insert into, and the metal object inserts little metal object and will leak, therefore the child can not produce the positive pole and the negative pole contact and reach the fire phenomenon no matter what metal object is used to play in the socket inside, causes the injury to child.
Visual positive pole (2) device on the socket is in socket positive pole hole (16), visual negative pole (9) on the plug, the device is in plug negative pole hole (22), hidden negative pole (3) contact with the socket in negative pole hole (17) that get into the socket, the visual negative pole recess (10) of plug is being pushed up in hidden negative pole (3) in the socket, visual negative pole (9) on the plug under the effect of socket negative pole spring (5), just can not produce the bad contact phenomenon because of inserting, pulling out wearing and tearing with hidden negative pole (3) in the socket.
The hidden negative pole (3) in the socket is arranged in the hidden negative pole hole (18) of the socket and is in contact with the negative pole power line connector (23) in the socket, and the hidden negative pole (3) in the socket is in contact with the negative pole power line connector (23) in the socket under the action of the side hole spring (26) in the socket, so that the phenomenon of poor contact caused by plugging and unplugging linkage abrasion is avoided.
The hidden positive electrode (11) in the plug is arranged in the hidden positive electrode hole (25) of the plug and is in contact with the positive power line connector (29) in the plug, and the hidden positive electrode (11) in the plug is in contact with the positive power line connector (29) of the plug under the action of the plug side hole spring (27), so that the phenomenon of poor contact caused by plug and pull linkage abrasion is avoided.
When the visible positive pole (2) of the socket is in close contact with the hidden positive pole (11) of the plug and the visible negative pole (9) on the plug is in close contact with the hidden negative pole (3) in the socket, the connection of a power supply is achieved. In conclusion, the socket and plug with one-level safety can not generate poor contact phenomenon due to plugging and unplugging abrasion.
The beneficial effects of the invention are that 1: the negative pole (3) is adapted and hidden through the negative pole spring (5) of the socket, and the socket side hole spring (26) is adapted to the socket power line connector (23); the plug positive pole spring (12) is matched with the plug to hide the positive pole, and the plug side hole spring is matched with the plug positive pole power line connector to solve the problem of sparking caused by poor contact of a conventional socket plug, protect a storage battery and an electric appliance, prolong the service life of the storage battery and the electric appliance and improve the safety performance; the plug and the socket are easy and labor-saving to insert and pull, and the service life of the plug and the socket is prolonged.
The beneficial effects 2 of the invention are: the visible positive pole of the socket can be seen by exposing the condyles outside, the hidden negative pole of the socket is hidden in a direction different from the visible positive pole and hidden in the negative pole hole, meanwhile, the visible positive pole safety plug matched with a set of visible positive pole safety socket plug can be seen by the visible negative pole of the plug, the hidden positive pole of the plug cannot be seen, and the directions of the positive pole and the negative pole of the visible positive pole safety plug are not directions, so that coins, keys or other metal objects can easily touch the positive pole and the negative pole because the directions of the positive pole and the negative pole of the conventional socket plug are directions and are on the same plane, once the positive pole and the negative pole are connected together, an electric shock phenomenon is generated instantly, and great harm is brought to people; because the positive and negative poles of the one-electrode-viewing safety socket plug and the one-electrode-viewing safety plug are not in one direction and one of the positive and negative poles is hidden in the positive pole hole or the negative pole hole, the one-electrode-viewing safety socket plug can not connect the positive and negative poles of the one-electrode-viewing safety socket plug together no matter how the one-electrode-viewing safety socket plug is used or how a child plays with the socket plug, the problem that the socket plug is electrically shocked to hurt people is thoroughly solved, and the safety performance of the plug socket is improved.
Drawings
FIG. 1 is a cross-sectional view of a plug and socket connection of the present invention.
Fig. 2 is an exploded view of the socket structure of the present invention.
Fig. 3 is an exploded view of the plug structure of the present invention.
Fig. 4 is a cross-sectional view of the socket of the present invention.
Fig. 5 is a cross-sectional view of the plug of the present invention.
Fig. 6 is a cross-sectional view of a jack housing of the present invention.
Fig. 7 is a cross-sectional view of the socket insulator of the present invention.
Fig. 8 is a left side view of the socket insulator of the present invention.
Fig. 9 is a cross-sectional view of the plug insulator of the present invention.
Fig. 10 is a right external view of the plug insulator of the present invention.
Figure 11 is a cross-sectional view of the plug housing of the present invention.
Fig. 12 is a structural view of the female negative power tab of the present invention.
Fig. 13 is a right side view of the receptacle of the present invention.
Figure 14 is a left side view of the plug of the present invention.
Fig. 15 is a structural view of the present invention.
In the figure: 1. a socket insulator; 2. a socket visible anode; 3. the socket hides the negative pole; 4. a negative power supply line; 5. a negative spring; 6. an insulating layer is fixed on the outer wall; 7. a positive power supply line; 8. a positive electrode groove; 9. a plug visible negative pole; 10. a plug negative electrode groove; 11. the plug hides the positive pole; 12. a plug positive spring; 13. a plug positive power line; 14. a plug negative power line; 15. a plug insulator; 16. a positive electrode hole in the socket; 17. a negative electrode hole; 18. the socket hides the negative pole hole; 19. a side hole of the socket cathode; 20. a socket anode power line hole; 21. a plug positive hole; 22. a plug negative pole hole; 23. a socket power cord connector; 24. a plug positive power cord hole; 25. the plug hides the positive hole; 26. a socket side hole spring; 27. a plug side hole spring; 28. symmetrical screw holes; 29. a plug positive power line connector; 30. a socket housing; 31. a plug housing; 32. a positioning guide projection in the socket; 33. a positioning guide groove on the plug; a socket positive wire interface; 35. a plug negative wire interface; 36. the socket negative pole hole corresponds to the hole; 37. the side hole of the negative electrode corresponds to a hole; 38. the positive power supply wire hole of the socket corresponds to the hole; 39. a plug negative lead hole; 40. a negative lead hole; 41. a positive lead hole; 42. a through hole; 43. a socket opening hole; 44. the plug is provided with a wide hole; 45. a set of one-view-one-pole safety socket and plug; 46. viewing an extremely safe plug; 47. the negative pole power cord hole of plug.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
1. In fig. 1, 4, 5 and 15, the set of one-pole-view safety socket plug of the present invention is composed of one-pole-view safety socket (45) and one-pole-view safety plug (46), and is characterized in that: the visible one-pole safety socket (45) is provided with an exposed socket visible positive pole (2) and a socket hidden negative pole (3); the visible negative electrode (9) of the exposed plug is arranged on the visible one-pole safety plug (46); a plug concealing anode (11) is provided.
In fig. 2, 4 and 12, the one-pole-view safety socket (45) of the present invention is composed of a socket insulator (1), a socket-view positive pole (2), a socket-hidden negative pole (3), a negative pole spring (5), a socket side hole spring (26), a socket housing (30) and a socket negative pole power line connector (23).
The socket visible anode (2) is arranged in an anode hole (16) in the socket of the socket insulator (1).
The socket hidden negative electrode (3) is arranged in a socket hidden negative electrode hole (18) of the socket insulator (1) and then is next to the device negative electrode spring (5).
The positive power line (7) is arranged in a socket positive power line hole (20) on the left side of the socket insulator (1).
The socket power line connector (23) is arranged in a socket negative pole side hole (19) on the left end face of the insulator (1) firstly and is next to the device socket side hole spring (26) and the negative pole power line (4).
The socket shell (30) is sleeved on the socket insulator (1).
In fig. 7, the socket insulator (1) features: the left end face of the socket is provided with a socket anode power line hole (20), a socket cathode side hole (19) and a cathode hole (17), the socket cathode side hole (19) is arranged above the cathode hole (17), and the socket anode power line hole (20) is arranged above the socket cathode side hole (19); the right side of socket insulator (1) is provided with outer wall fixed insulation layer (6), is provided with two symmetrical screw holes (28) on outer wall fixed insulation layer (6), the well upper portion of socket insulator (1) is provided with socket and hides negative pole hole (18).
In fig. 7, the right inner features of the socket insulator (1) are: the socket comprises a visual positive pole hole (16) and a visual negative pole hole (17) in the socket, wherein the visual positive pole hole (16) in the socket is arranged above the socket, and the visual negative pole hole (17) in the socket is arranged below the socket.
In fig. 4, the socket visible anode (2) is characterized by: the left part is provided with a socket anode power line interface (34), and the right part is provided with an anode groove (8).
In fig. 4, the socket hidden cathode (3) is characterized in that: is a column with a large upper end and a small lower end.
In fig. 6, the receptacle housing (30) is characterized by: the left side terminal surface is provided with socket negative pole hole and corresponds hole (36), socket negative pole side opening and corresponds hole (37), socket positive pole power cord hole and corresponds hole (38), the socket positive pole power cord hole corresponds hole (38) and corresponds the higher authority of hole (37) at socket negative pole side opening, and socket negative pole hole corresponds hole (36) and corresponds below hole (37) at socket negative pole side opening.
In fig. 4, the socket power line connector (23) is characterized by: the left end of the column is a plane, and the right end of the column is provided with a crescent moon mouth.
In fig. 3 and 5, the one-pole-viewing safety plug (46) of the invention is composed of a plug insulator (15), a plug visible negative pole (9), a plug hiding positive pole (11), a plug positive pole spring (12), a plug positive pole power line connector (29), a plug side hole spring (27) and a plug shell (31).
The plug visual negative pole (9) is arranged in the plug negative pole hole (22).
The plug hiding anode (11) is arranged in the plug hiding anode hole (25) firstly, and the lower part of the plug hiding anode is next to the plug hiding anode spring (12).
The plug positive power line connector (29) is arranged in the plug positive power line hole (24) firstly, and the right side of the plug positive power line connector is next to the plug side hole spring (27).
The left end of the plug insulator (15) is provided with a plug negative pole hole (22) and a plug positive pole hole (21), and the plug positive pole hole (21) is arranged below the plug negative pole hole (22).
The lower end of the plug insulator (15) is provided with a plug hiding positive hole (25); the right end face of the plug insulator (15) is provided with a plug negative pole hole (21), a plug positive pole power line hole (24) and a plug negative pole power line hole (47).
The plug shell (31) is sleeved on the plug insulator (15).
In fig. 3, 9, 10, the plug insulator (15) is characterized in that: the plug is provided with a plug positive pole hole (21) and a plug negative pole hole (22), wherein the plug positive pole hole (21) is arranged above the plug negative pole hole (22).
In fig. 3 and 5, the visible negative pole (9) of the plug is characterized in that: the left side wall surface is provided with a plug negative electrode groove (10), and the right side end surface is provided with a plug negative electrode wire interface (35).
In fig. 3 and 5, the plug hiding positive electrode (11) is characterized in that: a convex column.
In fig. 3 and 5, the plug positive spring (12) is characterized in that: an elastic substance.
In fig. 3 and 5, the plug positive power line connector (29) is characterized in that: the left end surface of the cylindrical body is crescent, and the right end surface is a plane.
In fig. 3, 5, the plug side hole spring (27) is characterized in that: an elastic substance.
In fig. 3, 11, the plug housing (31) is characterized in that: the left side port is a plug opening hole (44), and the right part is provided with a negative electrode lead hole (40), a positive electrode lead hole (41) and a through hole (42); the through hole (42) is provided in the upper half of the whole body, and the positive electrode lead hole (41) and the negative electrode lead hole (40) are provided in this order on the lower surface.

Claims (1)

1. One set of utmost point safe socket plug of looking is by looking an utmost point safe socket (45), looking an utmost point safe plug (46) and constitutes its characterized in that: the visible one-pole safety socket (45) is provided with an exposed socket visible positive pole (2) and a socket hidden negative pole (3); the visible negative electrode (9) of the exposed plug is arranged on the visible one-pole safety plug (46); a plug concealing anode (11) is provided.
CN201811370813.4A 2018-11-18 2018-11-18 One-set one-electrode safety socket plug Pending CN111200202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811370813.4A CN111200202A (en) 2018-11-18 2018-11-18 One-set one-electrode safety socket plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811370813.4A CN111200202A (en) 2018-11-18 2018-11-18 One-set one-electrode safety socket plug

Publications (1)

Publication Number Publication Date
CN111200202A true CN111200202A (en) 2020-05-26

Family

ID=70745662

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811370813.4A Pending CN111200202A (en) 2018-11-18 2018-11-18 One-set one-electrode safety socket plug

Country Status (1)

Country Link
CN (1) CN111200202A (en)

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