EP0033411B1 - An alternating current socket-outlet for electric equipment - Google Patents

An alternating current socket-outlet for electric equipment Download PDF

Info

Publication number
EP0033411B1
EP0033411B1 EP80303289A EP80303289A EP0033411B1 EP 0033411 B1 EP0033411 B1 EP 0033411B1 EP 80303289 A EP80303289 A EP 80303289A EP 80303289 A EP80303289 A EP 80303289A EP 0033411 B1 EP0033411 B1 EP 0033411B1
Authority
EP
European Patent Office
Prior art keywords
shutter
socket
outlet
members
pair
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.)
Expired
Application number
EP80303289A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0033411A2 (en
EP0033411A3 (en
Inventor
Yutaka Ichikawa
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.)
HIRAKAWA ELECTRIC WIRE Manufacturing Co Ltd
Original Assignee
HIRAKAWA ELECTRIC WIRE Manufacturing 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 HIRAKAWA ELECTRIC WIRE Manufacturing Co Ltd filed Critical HIRAKAWA ELECTRIC WIRE Manufacturing Co Ltd
Publication of EP0033411A2 publication Critical patent/EP0033411A2/en
Publication of EP0033411A3 publication Critical patent/EP0033411A3/en
Application granted granted Critical
Publication of EP0033411B1 publication Critical patent/EP0033411B1/en
Expired 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
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/447—Shutter or cover plate
    • H01R13/453—Shutter or cover plate opened by engagement of counterpart
    • H01R13/4534—Laterally sliding shutter
    • 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
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/447—Shutter or cover plate
    • H01R13/453—Shutter or cover plate opened by engagement of counterpart
    • 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
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/006—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits the coupling part being secured to apparatus or structure, e.g. duplex wall receptacle

Definitions

  • the invention relates to an alternating current socket-outlet for electric equipment; a pair of shutter members adapted to cover the openings to receive a pair of electrically conductive connector members are moved to uncover the openings when the two equivalent pushing forces are applied to the shutter members.
  • a socket outlet for electrical equipment comprises a pair of cover plates each having a single chamfered surface and which when subjected to the force by the pins of a plug urge the cover plates to move from a first position in which they cover openings of a connector member to a second position in which they uncover the openings for allowing the plug pins to be received therein.
  • a socket outlet for electrical equipment comprises a springloaded composite two-part shutter member.
  • One part has a set of similarly directed chamfered surfaces for moving the composite shutter member in a first direction while the other part has a further set of similarly directed chamfered surfaces for moving the composite shutter member in a second direction perpendicular to the first direction to uncover openings for the pins of a plug.
  • a socket outlet for electrical equipment comprises a pair of shutter members each having a chamfered surface at one end and a rounded surface at the other end whereby in use the rounded surface is contacted by a first pin or earth pin of a plug urging the shutter members to move in one direction whereupon the chamfered surfaces are contacted by other pins of the plug to urge the shutter members to move in another direction which uncovers openings for reception of the plug pins.
  • a socket-outlet for electric equipments which has a shutter means in the form of two shutter members adapted to cover the holes for electrically conductive connectors members.
  • This socket-outlet has the shutter members which are urged into contact by springs.
  • the hole for an earth pin of a plug is covered by two cam shaped members on the shutter members. When the pin is inserted into the hole, the earth pin engages the cam shaped members to force apart the shutter members.
  • the shutter members may be moved to enable the member to contact with the conductive connector member, and hence an infant and so forth are in danger of an electric shock by mistake.
  • a shutter apparatus for electric socket outlets comprising a pair of contact members, shutter means in the form of two shutter members movable between a first position to cover the contact members and a second position to uncover the contact members, and a resilient member urging the shutter members to the first position, each shutter member having a force receiving surface which produce the forces urging the shutter members in a first direction from the first -position to the second position against the resilient member when the shutter members are subjected to two symmetrically equal pushing forces by a pair of plug pins adapted to mate with the contact members, characterised in that each of the shutter members has a second force receiving surface to produce a force for urging each shutter member in a second direction transverse to said first direction when the pair of plug pins is inserted.
  • the advantages offered by the invention are mainly that even if the pushing force is applied to one of the two shutter members, they do not move; therefore even if an infant and so forth play a trick with a member other than the plug, the shutter members do not move, thereby an electric shock accident and the like can be avoided.
  • an AC socket-outlet in accordance with the invention comprises a body member 10, a pair of electrically conductive connector members 20 adapted to receive pins or blades of a plug, a spring 30, a shutter means in the form of two shutter members 40a and 40b, a front cover 50 having a guide 55 for guiding the plug to insert the pins into holes 52.
  • the body member 10 comprises a pair of openings or holes 11 adapted to receive the connector members 20 each in the form of slit sleeve, an opening or hole 12 to receive a spring 30, two pair of guide grooves 13a and 13b to regulate movements of the shutter members 40a and 40b respectively, recesses 14 formed in the upper and lower faces of the body member 10 to allow the fitting member described hereinafter to fit therein, a fitting projection 15 formed in each recess 14, slits 16 formed on both sides of the recess 14 to fix the fitting member in place in cooperation with the fitting projection 15, a lip 17, and a cavity 18 to receive the shutter members 40a and 40b therein.
  • a pair of L-shaped shutter members 40a and 40b comprise guide projections 41 a and 41 b adapted to engage guide grooves 13a and 13b respectively, engaging portions 42 each of which engages one of the pins of the plug to be moved in both vertical and horizontal directions and has the first and second inclined faces 42a and 42b, and spring stopping portions 43a and 43b to engage both ends 30a and 30b of the spring 30.
  • the front cover 50 has four pins 51 adapted to be inserted into the corresponding holes 19 formed in the body member 10, and guide holes 52 to allow the pins of the plug to pass therethrough and to guide toward the engaging portions 42 of the shutter members 40a and 40b.
  • the plug guide 55 has the inner diameter corresponding to the outer diameter of the collar 71 of the plug described hereinbelow, and a predetermined height, and it is integrally formed with the front cover 50.
  • FIG. 2 shows a situation in which an AC socket-outlet assembly 100 is not yet connected with a plug 200.
  • the AC socket-outlet assembly 100 has a front cover 50 having a guide 55 for plug 200 and holes 52 for guiding pins 60 of the plug, the body member having the recess 14, the fitting projection 15 and the slit portions 16, and the connector members 20.
  • the plug 200 comprises a pair of pins 60 to be inserted into the guide holes 52 and a body member 70 having a collar 71.
  • the pins 60 each has an electrically conductive end portion 60a and an insulated coating portion 60b.
  • Figures 3(A)-3(C) show one 40b of the shutter members shown in Figure 1 in further detail and in particular, the form of the engaging portion 42 can be accurately seen from the sectional views of Figures 3(B) and 3(C). That is, as shown in these drawings, the engaging portion 42 has two inclined planes 42a and 42b which are formed respectively on the two planes perpendicularly intersecting each other.
  • the shutter member 40b When the point of the pin 60 engages the shutter member 40b at the position V 2 , it engages the latter at the position h, in a cross section C-C and with further insertion of the pin 60, it leads to engage the latter at the position h 2 , whereby moving the latter in a right direction M 2 .
  • the shutter member 40b is continuously moved from the downward direction to the rightward direction by receiving the pushing force of the pin 60.
  • the shutter member 40a is also subject to a series of upward and leftward movements which are symmetric with the shutter member 40b.
  • FIGs 4(A) and 4(B) show situations obtained before and after the AC socket-outlet 100 is electrically connected with the pins 60 of the plug 200 respectively.
  • the shutter members 40a and 40b cover the holes 11, and hence the connector members 20 through elastic forces of the spring 30.
  • a series of movements of the shutter members described with respect to Figures 3(A)-3(C) are provided, thereby resulting in electrical connections of the pins 60 to the connector members 20 as shown in Figure 4(A).
  • the collar 71 of the plug body 70 is well fitted into the inner wall of the guide 55 for the plug 200.
  • Figures 5(A)-5(C) show front views of othe body member 10 of the socket-outlet.
  • Figure 5(A) shows the body member 10 including the holes 11 for the connector members 20 inserted, the above described guide grooves 13a and 13b for the shutter members, the opening portion 12 for the spring 30, the fitting projection 15 formed in the recess 14.
  • Figure 5(B) shows a situation where the holes 11 and hence the connector members 20 are covered by the shutter members 40a and 40b through the spring 30 inserted into the opening portion 12.
  • Figure 5(C) shows a situation where the shutter members 40a and 40b were moved from the covered position to an uncovered position to achieve an electrical connection of the connector members 20 with the pins 60 of the plug 200 through a series of movements of the shutter member described above.
  • the guide projections 41 a and 41 b of the shutter members 40a and 40b slide in the guide grooves 13a and 13b of the body member 10, thereby facilitating the above mentioned movements of the shutter members 40a and 40b.
  • FIGS 6(A)-6(D) show one of the preferred embodiments for fitting the AC socket-outlet 100 described above into a chassis 300 equipments.
  • the socket-outlet 100 is fitted into the chassis by two fitting members 80.
  • Each fitting member comprises a front end portion 81, an enlarged base portion 82 and a hole 83 engaged with the recess 14 of the body member 10.
  • the AC socket-outlet can conveniently and stably be fitted into the chassis; first each fitting member 80 is fixed into the recess 14 of the body member 10 by fitting the projection 15 into the hole 83 while sliding the enlarged base portion 82 in the slits 16 on the body member 10; and then the body member 10 is pushed into a hole on the chassis 100 until the elastic end portion 81 and the lip 17 of the body member 10 grasp the chassis therebetween.
  • the present invention can provide a high safety electrical connector from the facts that the AC socket-outlet 100 has the shutter members 40a and 40b; one can not make the contact with the connector members 60 from the exterior when the collar 71 of the plug body 70 is fitted into the plug guide 55; and the pins 60 each has the insulated portion 60b.
  • FIG. 7 shows another embodiment of the invention in which the plug guide 55 indicated in the embodiment described above is excluded. Since the same parts as those of the latter embodiment are represented by the same reference numbers, overlapping description is omitted.
  • FIGs 8(A)-8(C) show another construction of the shutter member 40b.
  • the construction of this shutter member is the same as that shown in Figures 3(A)-3(C) except that a fitting portion 42 comprises a curved surface.
  • Figure 9 shows further another embodiment except that the pins 60 of a plug 200 are in the form of blade and guide holes 52 are in the form of slit.
  • FIG 10(A) is an exploded view of a duplex socket-outlet or receptacle having the two shutter means 40 described above.
  • the duplex socket-outlet comprises a front cover 510, two shutter means 40 each in the form of two shutter members 40a and 40b, a base or body member 520, two fittings 530 and a rear cover 540.
  • the front cover 510 is of conventional type, and includes two recessed plug seats 511 each formed with a pair of hoies 512 adapted to receive two pins of a plug, and an opening 516 formed in one of the side walls to accept a flexible cord 400.
  • an internal thread 513 provided in the middle of the cover for engaging a cap screw 561 upon assembly, two recessed portions 515 which engage the corresponding convexed portions 521 of the base member 520 respectively and which are formed just under the holes 512, and four threaded holes or internal threads formed in the four corners (not shown) adapted to engage the corresponding four cap screws 560 respectively.
  • the base member 520 includes a pair of the convexed portions or projections 521, four openings 522 each adapted to receive one end 531 of each fitting 530 which come into contact with the pins of a plug, two openings 523 each adapted to receive a spring 30, four pairs of guide grooves 524 each pair to regulate the motion of shutter member 40a or 40b, and two cavities 525 each to allow the shutter means 40 to be fitted into it, a hole 526 to allow the cap screw 561 to be put through it when the front cover 510 and the base member 520 are assembled with the screw 561, four threaded holes 527 each adapted to engage one of four cap screws 550 for fixing the plug pin receiving fittings 530 to the base member 520, and two recesses 528 each adapted to engage the middle convexed portion 533 of the fitting 30.
  • Each fitting 530 compises two contacting segments 531 each adapted to contact with a pin of a plug and pressed into the form of a hollow semi-cylinder for providing a large area contact with the rod-shaped pin of the plug, two holes 532 each formed in the position corresponding to the threaded hole 527 of the base member 520 and a middle convexed portion 533 adapted to engage the recess 528 of the base member 520 and having an internal thread 534 to engage a cap screw 550 by which an eyelet 520 of a lead wire 410 of the cord 400 is connected to the fitting 30.
  • the rear cover 540 comprises four holes 541 for engaging the cap screws 560 formed in its four corners, a loose hole 542 for engaging the cap screw 561 formed in its central portion, four loose holes 544 for engaging the cap screws 550 adapted to fix the fittings 530 to the base member 520, and two rectangular projections 543 each formed around a pair of holes 544.
  • the fittings 530 to engage the pins of the plug are fabricated from a tin-plated phosphor bronze plate.
  • the other members are fabricated from the same material as that of the body member of the AC socket-outlet, that is, a 20% glass fiber-polybutylene terephthalate composite.
  • FIG 11 shows a double extension socket 600 fitted with the two shutter means according to the invention.
  • This socket is movable at will along with an extensible cord 400 connected to the connector members accommodated in its body member.
  • FIG. 12 shows a flush type of socket outlet 700 embedded into a wall 800 of a building, and having the shutter means in accordance with the invention.
  • this flush type of socket-outlet may be provided, for example, in a floor 900 or the ceiling of a building.
  • the inventive product is used as the AC socket-outlet which is installed in various electrical equipments and provides a power source from the latter to other electrical equipments.
  • a stereo sound system comprises a player, amplifier, tuner, speaker, etc.
  • the player requires its own power source and the amplifier and the tuner also require the respective power source.
  • a flush type of socket-outlet required for each of these components at least three socket-outlets are necessary. This makes no use of other electrical equipment while operating the stereo.
  • the power supply to the stereo is made from a household receptacle to the amplifier, and the power supplies to the player and the tuner are made from the socket-outlets installed in the amplifier.
  • the rated voltage of the AC socket-outlet described above is 250 V in Europe against 100 V in Japan, and hence an electric shock to the human body, a fire and so forth are raised as a great problem. Therefore, in order to prevent a direct contact with the connector members when the AC socket-outlet is not served, the shutter means to cover the energized connector members such as that disclosed in British Patent No. 1436611 has been provided.
  • the present invention also provides the AC socket-outlet fitted with shutter means which cover the connector members from the exterior upon its service and prevent the contact of the energized connector members with the plug pins used for the source of other electrical equipments unless the two symmetrically equivalent pushing forces are applied to both shutter members upon its service.
  • polybutylene terephthalate was selected as a material for them. However, this material was insufficient to meet the impact resistance of the AC socket-outlet. After a variety of investigations, it has been found that a composite comprising 20% glass fiber-polybutylene terephthalate can satisfy all of the above requirements.
  • the typical properties of the composite are as follows:
  • polyamide resin reinforced with mineral matter was selected as a material for the shutter member.
  • the fitting member for installing the socket-outlet on electrical equipments has to hold the former fitted on the latter and is not allowed to increase its settling and fatigue after a plug insertion-withdrawal test of 5000 times. From these respects, polycarbonate superior in mechanical, in particular, elastic property was selected as a material for the fitting member.
  • a tin-plated phosphor bronze plate was used as a material for the connector member.
  • This spring is one of the most important members to achieve the invention, and shall be stable in mechanical properties, in particular, elastic property and excellent in corrosion resistance.
  • a stainless steel SUS 304, WPB
  • a coiled spring wire diameter, 0.5 mm, mean diameter of coil, 4.6 mm, length over coil, 4.5-5.0 mm
  • the body member 10 is provided with the openings 11 each adapted to receive the connector member 20 and the slots (not shown) formed in the rear face each to allow the terminal 21 of the connector member 20 to pass through. Fixation of the connector member 20 to the body member 10 are carried out by means of the projections 22 formed in the connector member 20 after passing through the slot.
  • the spring 30 is inserted into the opening 12 formed in the body member 10 and holded by both side walls of the opening 12.
  • Fixation of the front cover 50 to the body member 10 is carried out by inserting four projected pins 51 of the front cover 50 into the corresponding holes 19 provided in the front face of the body member 10.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
EP80303289A 1980-01-17 1980-09-18 An alternating current socket-outlet for electric equipment Expired EP0033411B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1980003911U JPS5924140Y2 (ja) 1980-01-17 1980-01-17 Ａｃアウトレツト
JP3911/80U 1980-01-17

Publications (3)

Publication Number Publication Date
EP0033411A2 EP0033411A2 (en) 1981-08-12
EP0033411A3 EP0033411A3 (en) 1981-09-09
EP0033411B1 true EP0033411B1 (en) 1984-05-30

Family

ID=11570361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303289A Expired EP0033411B1 (en) 1980-01-17 1980-09-18 An alternating current socket-outlet for electric equipment

Country Status (3)

Country Link
EP (1) EP0033411B1 (ja)
JP (1) JPS5924140Y2 (ja)
DE (1) DE3068044D1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947741A3 (en) * 2007-01-18 2009-12-09 Delphi Technologies, Inc. Electrical connector body having cantilevered terminal hold-down beams

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE17416T1 (de) * 1980-12-03 1986-01-15 Wkr Limited Elektrischer verbindungsstecker.
GB2233509B (en) * 1989-05-17 1994-04-06 Wah Yuk Li Electrical socket
US5069630A (en) * 1990-10-01 1991-12-03 Tseng Jeou N Socket assembly for electrical plugs
FR2740270B1 (fr) * 1995-10-24 1997-12-12 Professional General Elect Dispositif de connexion du type comportant une fiche male destinee a s'inserer dans une fiche femelle et piece intercalaire pour ce dispositif de connexion
ES2147706B1 (es) * 1998-03-20 2001-04-01 Interlander Patermann S L Conjunto modular de enchufe para mecanismos de superficie.
ES1066378Y (es) * 2007-11-19 2008-04-01 Simon Sa Obturador-protector para bases polivalentes de enchufe y aptas para enchufar clavijas.
WO2019129352A1 (en) * 2017-12-28 2019-07-04 Schurter Ag Socket with blocking shutters

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH144688A (de) * 1930-04-02 1931-01-15 Henny Dr Schneider Steckdose mit Einrichtung zum Verhindern des Berührens der Steckhülsen oder der unrechtmässigen Benützung derselben.
CH239441A (de) * 1943-09-09 1945-10-15 Leutenegger Friedrich Elektrische Steckvorrichtung mit einer Schutzeinrichtung gegen Personengefährdung.
GB682727A (en) * 1950-08-29 1952-11-12 Crabtree & Co Ltd J A Improvements in shuttered electric sockets
GB691813A (en) * 1951-01-12 1953-05-20 Telephone Mfg Co Ltd Improvements in and relating to electrical plug and socket connectors
GB954728A (en) * 1962-06-28 1964-04-08 Ass Elect Ind Improvements in shuttered electrical socket outlets
NO118223B (ja) * 1966-03-28 1969-12-01 Luma Lampan Ab
GB1367992A (en) * 1972-05-01 1974-09-25 Amf Inc Socket device
GB1436611A (en) * 1973-07-11 1976-05-19 Rendar Instr Ltd Electrical connecto's
GB1534602A (en) * 1977-07-01 1978-12-06 Midland Electric Mfg Co Ltd Electrical sockets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947741A3 (en) * 2007-01-18 2009-12-09 Delphi Technologies, Inc. Electrical connector body having cantilevered terminal hold-down beams

Also Published As

Publication number Publication date
EP0033411A2 (en) 1981-08-12
EP0033411A3 (en) 1981-09-09
JPS5924140Y2 (ja) 1984-07-17
DE3068044D1 (en) 1984-07-05
JPS56106382U (ja) 1981-08-19

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