EP0289687A1 - Safety plug set and corresponding socket - Google Patents

Safety plug set and corresponding socket Download PDF

Info

Publication number
EP0289687A1
EP0289687A1 EP87830164A EP87830164A EP0289687A1 EP 0289687 A1 EP0289687 A1 EP 0289687A1 EP 87830164 A EP87830164 A EP 87830164A EP 87830164 A EP87830164 A EP 87830164A EP 0289687 A1 EP0289687 A1 EP 0289687A1
Authority
EP
European Patent Office
Prior art keywords
plug
socket
holes
front cover
hook
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.)
Withdrawn
Application number
EP87830164A
Other languages
German (de)
English (en)
French (fr)
Inventor
Li Chiu-Shan
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.)
CHIU SHAN LI
Original Assignee
CHIU SHAN LI
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 CHIU SHAN LI filed Critical CHIU SHAN LI
Publication of EP0289687A1 publication Critical patent/EP0289687A1/en
Withdrawn legal-status Critical Current

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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
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • H01R13/6395—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap for wall or panel outlets
    • 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
    • H01R13/20—Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together

Definitions

  • This invention relates to safety plug set and corresponding socket.
  • the present invention provides an improved safety plug set and corresponding socket comprising a front cover, a plurality of conductive plates, a plurality of control blocks, a back cover, the socket further having L-shaped or T-shaped plug holes on the front cover.
  • Each plug hole has a partitioning board on the back, and is incorporated with a conductive plate having a retaining portion at the upper end and a hook, which is apt to fix an electric wire at the lower end.
  • the hook can be raised by the control block for removal of electric wire. All these components are placed in an assembly composed of the front cover, the back cover and a frame to form a socket, as before mentioned.
  • the plug has corresponding L-shaped or V-shaped or U-shaped pins.
  • An adapter has plug holes for the connection of a conventional plug, and a plug for the connection to the socket according to the present invention.
  • a plug 1 has two pins 11, 11 ⁇ , each pin having an end in the shape of "L”, and a socket 2 has a design corresponding to the plug 1.
  • the socket 2 mainly comprises a front cover 21, conductive plates 22, control blocks 23, a back cover 24, and a frame 25.
  • a front cover 21 has plug holes 211, 211 ⁇ in the shape of "L” or “V”, and flange portions 213 along its edge.
  • a partitioning board 214 separates plug holes 211, 211 ⁇ inside a chamber 212, which is defined by the front cover 21.
  • each plate having its upper end bent to form a curved retainer 221, 221 ⁇ which is used to retain the end 12, 12 ⁇ of a pin 11, 11 ⁇ , and its lower end bent upward to an appropriate position and then bent backword to form a hook 222 to be placed in the chamber 212.
  • Control blocks 23, 23 is in the form of a block placed behind the hook 222 of the conductive plate 22 to control raising and lowering of the hook 222.
  • the back cover 24 is in the form of a hollow frame having flange portions 241 along its edge, and has holes 242 for passing through electric wires, as well as slots 243 to drive the control blocks 23, 23.
  • a frame 25 is a rectangular split structure with a plurality of stop slots 251 to connect flange portions 213 of the front cover 21 and flange portions 241 of the back cover.
  • a stop pin 252 and a stop hole 253, which are provided at the frame ends, respectively, are designed to allow the assembling of the socket 2, by fixing together each other.
  • a screwdriver By inserting a screwdriver in the slot 243 to press down the control block 23 in order to raise the hook 222, wire can be removed easily.
  • Fig. 4 shows an adapter for fitting a conventional plug into holes 13, 13 ⁇ of the present invention. Therefore, the socket according to the present invention can be used for any conventional electric appliance without changing its plug.
  • a plug for wall lamp and an adapter according to the invention are connected to respective sockets by hooks to increase bearing capacity and security is assured.
  • the plug and socket set is for use on extension line.
  • the plug 1 has a structure identical to that described above.
  • Electric wires 14 are connected to the pins 11, 11 ⁇ , respectively.
  • Each of the pins 11, 11 ⁇ has an end 12, 12 ⁇ in the shape of "V".
  • the socket comprises a front cover 31, an intermediate frame 32, conductive plates 33, 33 and a back cover 34.
  • Each conductive plate 33 is installed in a manner that its slant contact position 331 is passing through a hole 321 of the intermediate frame 32 and then in a slant slot 311 of the front cover 31 so that, after insertion, the plug 1 can slide downwards till ends 12, 12 ⁇ of the pins 11, 11 ⁇ keep contacting with the slant contact portions 331, 331 for the connection to power source.
  • the embodiment shown has three pairs of plug holes 312 on the socket 3, from which the plug 1 can be removed from either the upper, intermediate or lower position, and therefore the conductive plate 33 has three cut off 332 to ease removal of the plug 1, and has a hook 333 at one end for connection of electric wire.
  • the back cover 34 has a hole 341 to connect together front cover 31, intermediate frame 32, conductive plates 33, 33 and back cover 34 by a screw 35.
  • each pin 11 on the plug 1 is bent inward and then inserted in the socket 3 to keep in touch with the slant contact portion 331 on a metal plate 33 in the socket 3 for connection to power source.
  • the socket 4 comprises a front cover 41, conductive plates 42, 42 ⁇ a back cover 43.
  • the front cover 3 has three pairs of plug holes 411, 411 ⁇ , and three pairs of rails 412, 412 ⁇ . Except the three sets of plugs holes 411, 411 ⁇ and three sets of rails 412, 412 ⁇ , which are projected from inner wall of the front cover 41, the other parts are recesses 413, 413 ⁇ , to contain the conductive plates 42, 42 ⁇ which are placed symmetrically, with their spring portions 421, 421 ⁇ at appropriate position.
  • the spring portions 421, 421 ⁇ are in slots 414, 414 ⁇ .
  • the recess 422 on the conductive plate 42 is just aligned with the projected part 412 of the front cover 41 so that the conductive plate 42 can be placed entirely in the recess 413.
  • the end of the conductive plate 42 is connected to two electric wires 44 running along a curved slot 415 on the front cover 41 and a curved slot 431 on the back cover 43.
  • the back cover 43 has a plurality of support plates 432 to press the conductive plate 42, and is connected to a block 416 by means of a screw 45 through a hole 433.
  • the plug and socket set according to the invention can be used for two phase, three phase three wires or three phase four wires power source.
  • An end of each pin 52 of the plug 5 is connected to an electric wire and then fixed to a block 55 by means of screw 54.
  • the other end of the pin 52 is passed through a hole 56 and then exposed outside. End 57 of the pin 52 is bent to a shape of "L”.
  • the plug is threaded with a thread 53 for connection of a cap 51.
  • Socket 6 according to the present invention mainly comprises a front cover 61, conductive plates 62, a frame 63, spring contact plates 64, control blocks 65 and a back cover 66.
  • the socket 6 can be designed to fit two phase or three phase power source.
  • the socket 6 shown in the drawing is for three phase three wires power source.
  • the front cover 61 has a certain number of plug holes 611, each connected to a curved rail 612 with slot 613 along inner side for containing contact portion 621 of a conductive plate 62.
  • the other end of the conductive plate 62 is in the form of a long bar and is inserted through a hole 631 of the frame before placing the bent part 641 of the spring contact plate 64 into the hole.
  • the bent part 641 is firmly fixed in the hole 631 and is kept contacting with the conductive plate 62.
  • the other end of the spring contact plate 64 is bending downward to form a hook 642.
  • the back cover 66 is positioned and used to fix the above components by means of screws 67. Electric wires are inserted through a round hole 661 on the back cover 66 and firmly held by the hook 642. By pressing the control block 65 with a square spline 662 to raise the hook 642, the electric wire can be removed.
  • Fig. 15 illustrates use of the present invention on three phase power.
  • a pin 52 of the plug is smaller than others as a distinction to avoid wrong connection between plug 5 and socket 6.
  • a round pin may be designed among three pins or four pins in different spaces or a smaller pin may be designed for use on power source of three phase four wires.
  • the front cover 71 of the socket 7 has two plug holes 711, each in the form of "T".
  • a U-slot 712 with a size just for containing a conductive plate 72 with its front end 721 bending outward and its rear end perpendicular to the front end.
  • the rear end 722 is bending downward to form a hook 723.
  • End 12 of each pin 11 is kept in touch with the front end 721 elastically.
  • the back cover 74 has flange portions 741 along its edge, a hole 742 for passing through wires and a slot 743 for removal of wires. It is fixed to a frame. Its structure will not be herein described because it has been described in detail above.
  • the adapter 8 has holes 81 for pins of a conventional plug 82 and pins and bent ends 83 for the connection to a socket 7 according to the present invention.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
EP87830164A 1987-04-28 1987-05-05 Safety plug set and corresponding socket Withdrawn EP0289687A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA873042A ZA873042B (enrdf_load_stackoverflow) 1987-04-28 1987-04-28

Publications (1)

Publication Number Publication Date
EP0289687A1 true EP0289687A1 (en) 1988-11-09

Family

ID=25578834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87830164A Withdrawn EP0289687A1 (en) 1987-04-28 1987-05-05 Safety plug set and corresponding socket

Country Status (2)

Country Link
EP (1) EP0289687A1 (enrdf_load_stackoverflow)
ZA (1) ZA873042B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234866A (en) * 1989-08-01 1991-02-13 Lee Chiu Shan Socket outlet for receiving a variety of plugs
EP0817328A3 (en) * 1996-07-04 1998-07-15 Sumitomo Wiring Systems, Ltd. L-shaped bulb connector
SG155106A1 (en) * 2008-02-19 2009-09-30 Gem Terminal Ind Co Ltd Plug inner frame
CN104409903A (zh) * 2014-11-06 2015-03-11 成都汉度科技有限公司 充电桩插线口结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926327A (en) * 1956-02-03 1960-02-23 Italo Rizzieri Socket and plug connection for electric circuits
FR2256558A1 (en) * 1973-12-28 1975-07-25 Imfeld Maurice Two pin safety socket outlet - has terminals covered by an apertured shutter when plug is removed
AU514393B2 (en) * 1977-07-06 1981-02-05 Crouse-Hinds Company Cover assembly for electrical outlet box

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926327A (en) * 1956-02-03 1960-02-23 Italo Rizzieri Socket and plug connection for electric circuits
FR2256558A1 (en) * 1973-12-28 1975-07-25 Imfeld Maurice Two pin safety socket outlet - has terminals covered by an apertured shutter when plug is removed
AU514393B2 (en) * 1977-07-06 1981-02-05 Crouse-Hinds Company Cover assembly for electrical outlet box

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234866A (en) * 1989-08-01 1991-02-13 Lee Chiu Shan Socket outlet for receiving a variety of plugs
GB2234866B (en) * 1989-08-01 1994-03-30 Lee Chiu Shan Multipurpose safety receptacle
EP0817328A3 (en) * 1996-07-04 1998-07-15 Sumitomo Wiring Systems, Ltd. L-shaped bulb connector
US5876251A (en) * 1996-07-04 1999-03-02 Sumitomo Wiring Systems, Ltd. L-shaped bulb connector
SG155106A1 (en) * 2008-02-19 2009-09-30 Gem Terminal Ind Co Ltd Plug inner frame
CN104409903A (zh) * 2014-11-06 2015-03-11 成都汉度科技有限公司 充电桩插线口结构
CN104409903B (zh) * 2014-11-06 2016-09-28 新昌县澄潭镇博纳机械厂 充电桩插线口结构

Also Published As

Publication number Publication date
ZA873042B (enrdf_load_stackoverflow) 1987-10-21

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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