EP0125141B1 - Elektrische Steckdosen - Google Patents

Elektrische Steckdosen Download PDF

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Publication number
EP0125141B1
EP0125141B1 EP84303115A EP84303115A EP0125141B1 EP 0125141 B1 EP0125141 B1 EP 0125141B1 EP 84303115 A EP84303115 A EP 84303115A EP 84303115 A EP84303115 A EP 84303115A EP 0125141 B1 EP0125141 B1 EP 0125141B1
Authority
EP
European Patent Office
Prior art keywords
socket
switch
plug
socket outlet
fascia
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
EP84303115A
Other languages
English (en)
French (fr)
Other versions
EP0125141A1 (de
Inventor
John Chiltern House Newman
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.)
GTE Rotaflex Ltd
Original Assignee
GTE Rotaflex 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 GTE Rotaflex Ltd filed Critical GTE Rotaflex Ltd
Priority to AT84303115T priority Critical patent/ATE36623T1/de
Publication of EP0125141A1 publication Critical patent/EP0125141A1/de
Application granted granted Critical
Publication of EP0125141B1 publication Critical patent/EP0125141B1/de
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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch

Definitions

  • This invention relatees to electricity supply systems and devices. More particularly the invention concerns an electric socket outlet adapted to receive a plug connector wired to an appliance for supplying electric power to that appliance.
  • a fascia plate provided with a number of openings which provide access to the electrical contacts of the socket and into which respective contact pins of a plug are inserted when the plug is engaged with the socket.
  • the socket contacts are freely accessible through the openings, which is potentially dangerous especially if the socket is mounted at or near floor level, since small children may push their fingers or sharp instruments into the openings and make contact with the live contacts.
  • One form of shutter device comprises a shutter which is urged by a spring towards a closed position in which it covers the line contacts against access through the respective openings.
  • the shutter has a tongue which in the closed position is located immediately behind the opening intended to receive the earth pin of the electric plug, and upon inserting the plug into the socket the earth pin engages the tongue and slides backthe shutter to enable the current pins to enter into cooperation with the power contacts of the socket.
  • Documents disclosing inner shutter arrangements for electric socket outlets are: JP-U-57016177; FR-A-1283102; GB-A-434078; FR-A-1423724; DE-C-705485; GB-A-954728; GB-A-904694; GB-A-658936 and GB-A-1551249.
  • an electric socket outlet comprising a fascia member having a plurality of openings forthe pins of an electric plug to enter and pass into cooperation with respective socket contacts, an inner shutter device arranged between the fascia member and socket contacts normally to close off access to the line contacts and to permit such access upon engagement of an appropriate plug with the socket, characterised in that an outer shutter mounted at the front of the fascia member so as not to project forwardly beyond the front face of said fascia member, and the outer shutter is arranged for sliding movement between a closed position covering said openings and an open position in which the openings are exposed for entry of the plug pins.
  • the socket openings are hidden completely by the outer shutter and the socket has an essentially solid appearance.
  • the socket will not attract the same interest from a child as the known sockets with permanently exposed holes.
  • access to the power contacts is more difficult since it is necessary for two shutters operated in different ways to be opened first.
  • the socket of the invention also has the additional attendant advantage of improving the aesthetic qualities by hiding the openings from view.
  • the outer shutter is preferably biased by a spring to the closed position so that it is closed automatically on removing a plug from the socket and the shutter must be moved against the spring force to gain access to the openings.
  • the outer shutter consists of a T-shaped plate which is slidably mounted in a shallow recess of similar configuration in the front surface of the fascia member.
  • the front face of the fascia member may include a groove arranged to guide a pin, preferably the earth pin of a plug into abutment with the shutter for moving it to the open position with the pin.
  • an electric socket outlet comprising a fascia member having a plurality of openings for the pins of an electric plug to enter and pass into cooperation with respective socket contacts, a switch having an operating member protruding through the fascia member, the switch being operable to make and break electrical connection between a line contact and a current conducting element of the socket outlet, said switch being so arranged that it can only be turned “on” to make said connection when a plug is inserted in the socket outlet, characterised in that an interlock device (59, 60) is actuable by a pin (65) of the electric plug and is arranged to prevent the switch operating member (50) being moved to the "on” position when there is no plug inserted in the socket outlet, and to allow the switch to be turned “on” when an electric plug is inserted in the socket.
  • the interlock device is provided in the form of a movable member displaced by an earth pin of the plug, the interlock member blocking the switch operating member against movement to the "on" position when there is no plug inserted in the socket outlet.
  • the distribution duct illustrated in Figures 1 to 4 has an outer casing including a rear member 1 and a front cover 2 both formed as continuous extrusions. Within the outer casing is disposed an inner casing member 3 also formed as an extrusion, the member 3 being supported by the cover 2 and the cover 2 and member 3 both having snap-fit connections 4 with the rear casing member 1.
  • the ducting is intended to be mounted to a wall, e.g. close to the floor to form a skirting, the rear member 1 being first secured in position and then having the inner casing member 3 and cover 2 fitted to it.
  • the inner casing member defines three longitudinal channels along which extend respective conductor strips, namely an earth strip 5, a live strip 6 and a neutral strip 7.
  • each outlet position the cover 2 is provided with a rectangular aperture, an electrically insulating insert 8 is disposed between the inner casing member 3 and the conductor strips 5-7 to hold them in proper position, and each strip is formed with two spaced apart upstanding U-shaped portions defining socket contacts for cooperation with the respective contact pins of an electric plug.
  • the U-shaped contact portions for the earth strip 5 are seen in Figure 2 and are designated with the numeral 9.
  • a socket 10 Located within the casing at each outlet position is a socket 10 having a fascia plate 11 shaped to protrude through the aperture in the cover 2, and a body 12 firmly fixed to the fascia plate and having snap-fit connections 13 with the insert 8.
  • the body includes pairs of tongues 19 which project down into the respective channels of the insert 8 either side of the contact portions of each conductor strip thereby to provide additional support for these conductor portions, as shown in Figure 2 for the earth strip.
  • a shallow recess 14 of T-shape In the front surface of the fascia plate is a shallow recess 14 of T-shape, and provided in the bottom of the recess are a longitudinal slot 15, and openings 16-18 to receive the earth, live and neutral contact pins of a conventional 3-pin plug, the opening 16-18 being located in register with the contact portions of the conductor strips 5-7 respectively.
  • An outer shutter plate 20 also ofT-shape is received in the recess 14 and is guided for longitudinal sliding movement by rails 21 which engage in the slot 15, and by latching projection 22 which snap behind inturned edges 24 of the fascia plate to secure the shutter to the fascia plate.
  • the shutter is movable between the closed position shown in Figure 1 in which it covers the openings 16-18 and an open position in which the openings are uncovered.
  • the outer surface of the shutter is flush with that of the fascia plate so as not to impede engagement of a plug body flat against the socket surface.
  • a spring 25 interposed between opposed abutment shoulders on the
  • an inner shutter 30 mounted slidably between the fascia plate 11 and body 12 is an inner shutter 30 also of T-shape configuration, and the opposite arms of which are arranged to underlythe socket openings 17-18 to deny access to the power conductors 6, when the shutter is closed.
  • the shutter 30 is guided for longitudinal movement by the side walls of the slot 15 in the fascia plate, and includes an integral nose portion 31 arranged to underlie the earth contact opening 16 when shutter is closed.
  • the nose portion has a curved cam surface which is adapted to be engaged by an earth contact pin inserted through the opening 16 for the shutter to be displaced in an open position in which access to the contact portions of conductors 6, is possible.
  • the shutter is normally urged to the closed position by a spring 32 positioned between opposed abutment shoulders on the shutter 30 and the fascia plate.
  • the recess 14 in the fascia plate 11 includes an end part with side and end surfaces which slope inwardly towards the opening 16 to define a groove 35 to assist in guiding an earth pin into abutment with the adjacent end of the outer shutter 20 and then into the opening 16 for opening the inner shutter.
  • both shutters 20, 30 are closed to deny access to the conductors 6, 7, and the socket openings 16-18 are also hidden by the outer shutter 20.
  • the tip of the earth pin which is slightly longer than the current carrying pins, is positioned in the groove 35 of recess 14 and is moved to slide the shutter 20 back against the force of spring 25 so as to uncover the openings 16-18.
  • the earth pin is then pushed through the opening 16 to engage and slide back the inner shutter 30 allowing the current pins of the plug to pass through the openings 17, 18 and into contact with the contact portions of conductors 6, 7, the earth pin itself coming into cooperation with the contact portions 9 of the earth conductor 5.
  • the inner and outer shutters are returned automatically to their closed positions by the spring 25, 32.
  • outer sliding shutter of the invention has been described specifically in relation to a socket embodied in a distribution bus duct, it will be understood that it is equally applicable to separate outlet sockets of the type connected to the mains supply by electric cable.
  • a socket is illustrated in Figures 5-9 and the outer shutter 20 may be conveniently mounted slidably on the outside of the fascia plate 11 in essentially the same manner as described above in connection with Figures 1 to 4 or in any other way.
  • the socket outlet of Figures 5-9 includes a switch which is operated by means of an actuating member in the form of a rocker 50 which protrudes through an opening in the fascia plate 11.
  • the switch mechanism is housed within a body 51 attached to the rear of the fascia plate. As seen in Figure 7, the body 51 also accommodates terminals 52-54 for the connection of the live, neutral and earth wires, respectively, of a mains supply circuit.
  • a neutral contact 55 is connected to the terminal 53 and an earth contact 56 is connected to the terminal 54.
  • Connected to the terminal 52 is a conducting element 58 which is also connected to the moving contact of the switch (not shown).
  • the moving contact is movable by means of the rocker 50 between an "off” position in which it is disengaged from a live contact 57 and an "on” position in which it engages this contact to establish electrical continuity between the contact 57 and terminal 52.
  • the contacts 55-57 include pin contacting portions located behind te fascia plate in register with the openings in the fascia plate for cooperation with the respective pins of a plug when it is inserted into the socket outlet.
  • an interlock device is provided.
  • This device comprises a slide member 59 guided for linear sliding movement in the socket body and urged to a switch blocking position ( Figure 8) by a spring 60.
  • the member 59 At one end the member 59 is provided with a cam surface 61 and at its other end includes a stop shoulder 62 and a further cam surface 63.
  • the cam surface 61 In the blocking position of member 59, the cam surface 61 is located in alignment with the pin contacting portion of the earth contact 56, and the stop shoulder is located beneath an integral finger 64 provided on rocker 50 whereby the rocker is prevented from being moved to the "on" position to make the connection between contact 57 and element 58.
  • the live contact 57 remains isolated from the mains supply.
  • the earth pin 65 When a plug is inserted into the socket the earth pin 65, after first moving the outer shutter 20 as well as the inner shutter (not shown) to the open positions, engages the cam surface 61 and drives the slide member 59 against the bias of spring 60 to a switch released position ( Figure 9) as the plug is pushed fully home into the socket outlet.
  • the finger 64 of rocker 50 is now aligned with a recess in the slide member and the rocker can be manipulated to close the switch. In this position of the slide member the switch can be operated in conventional manner to control supply of electric power to a plug engaged with the socket.
  • the socket outlet is provided with a neon indicator lamp 66 which is illuminated when the switch of the socket is turned on.

Landscapes

  • Insulated Conductors (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Dry Shavers And Clippers (AREA)

Claims (16)

1. Elektrische Steckdose mit einem Deckteil (11) mit mehreren Öffnungen (16-18) für die Stifte eines elektrischen Steckers zum Ein- und Durchtreten in Zusammenwirkung mit entsprechenden Steckdosenkontakten (5-7) und einer inneren Verschlußvorrichtung (30), die zwischen dem Deckteil und den Steckdosenkontakten angeordnet ist, um normalerweise den Zugang zu den Leitungskontakten zu verschließen und einen solchen Zugang bei Eingriff eines geeigneten Stekkers mit der Steckdose zu gestatten, dadurch gekennzeichnet, daß ein äußerer Verschluß (20) an der Vorderseite des Deckteils (11) so befestigt ist, daß er nach vorn nicht über die Vorderfläche des Deckteils vorsteht, und daß der äußere Verchluß zur gleitenden Bewegung zwischen einer Schließstellung, die die Öffnungen (16-18) abdeckt, und einer Öffnungsstellung, in der die Öffnungen für den Eintritt von Steckerstiften zugänglich sind, eingerichtet ist.
2. Steckdose nach Anspruch 1, bei der der äußere Verschluß (20) in einer Vertiegung (14) in der Vorderseite des Deckteils (11) aufgenommen ist.
3. Steckdose nach Anspruch 2, bei der die Vorderfläche des äußeren Verschlusses (20) im wesentlichen bündig mit der Vorderfläche des Deckteils (11) ist.
4. Steckdose nach Anspruch 2 oder 3, bei der der äußere Verschluß eine T-förmige Platte (20) enthält und zur Längsbewegung in einer Vertiefung von ähnlicher Gestalt im Deckteil geführt ist.
5. Steckdose nach einem der Ansprüche 1 bis 4, bei der das Deckteil (11) eine Rille (35) in der Vorderseite derselben zur Führung eines Steckerstiftes in Anlage mit dem äußeren Verschluß (20) zum Bewegen des Veschlusses von der Schließstellung in die Öffnungsstellung aufweist.
6. Steckdose nach Anspruch 5, bei der die Öffnungen eine Erdstiftöffnung (16) enthalten und die FÜhrungsrille (35) auf diese Erdstiftöffnung ausgerichtet ist, damit der äußere Verschluß mit dem Erdstift eines Steckers bewegt wird.
7. Steckdose nach einem der Ansprüche 1 bis 6, bei der der äußere Verschluß (20) durch eine Federeinrichtung (25) in die Schließstellung vorgespannt ist.
8. Steckdose nach einem der Ansprüche 1 bis 7, bei der der äußere Verschluß an dem Deckteil mittels einer Schnappverbindung (22, 24) befestigt ist.
9. Steckdose nach einem der Ansprüche 1 bis 8, bei der ein Schalter enthalten ist und ein Betätigungselement (50) aufweist, das durch das Deckteil (11) vorsteht, wobei der Schalter betätigbar ist, um eine elektrische Verbindung zwischen einem stromführenden Kontakt (57) und einem Stromleiterelement der Steckdose herzustellen und zu unterbrechen, dadurch gekennzeichnet, daß eine Schaltersperrvorrichtung (59, 60), die durch einen Stift (65) des elektrischen Steckers betätigbar ist, dazu vorgesehen ist zu verhindern, daß das Schalterbetätigungselement (50) in die Einschaltstellung bewegt wird, wenn kein Stecker in die Steckdose eingesteckt ist, und es zu ermöglichen, daß der Schalter eingeschaltet wird, wenn ein elektrischer Stecker in die Steckdose eingeführt ist.
10. Elektrische Steckdose mit einem Deckteil (11), das mehrere Öffnungen für die Stifte eines elektrischen Steckers zum Eintreten und Durchtreten in Zusammenwirkung mit entsprechenden Steckdosenkontakten (55, 56, 57) aufweist, mit einem Schalter mit einem Betätigungselement (50), das durch das Deckteil vorsteht, wobei der Schalter betätigbar ist, um eine elektrische Verbindung zwischen einem Leitungskontakt (57) und einem Stromleiterelement (58) der Steckdose herzustellen und zu unterbrechen, wobei der Schalter so angeordnet ist, daß er nur dann eingeschaltet werden kann, um die genannte Verbindung herzustellen, wenn ein Stecker in die Steckdose eingesteckt ist, dadurch gekennzeichnet, daß eine Sperrvorrichtung (59, 60) durch einen Stift (65) des elektrischen Steckers betätigbar ist, und so angeordnet ist, daß sie verhindert, daß das Betätigungselement (50) in die Einschaltstellung bewegt wird, wenn kein Stecker in die Steckdose eingesteckt ist, und es ermöglicht, daß der Schalter eingeschaltet wird, wenn ein elektrischer Stecker in die Steckdose eingeführt ist.
11. Steckdose nach Anspruch 9 oder 10, bei der die Sperrvorrichtung so eingerichtet ist, daß sie durch einen Erdstift (35) des Steckers betätigt wird.
12. Steckdose nach Anspruch 9, 10 oder 11, bei der die Sperrvorrichtung ein Element (59) enthält, das zwischen einer Blockierstellung (Fig. 8), in der das Element die Bewegung des Schalterbetätigungselements (50) in die Einschaltstellung sperrt, und einer Schalterfreigabestellung (Fig. 9), in der das Betätigungselement (50) zur Bewegung zwischen den Ein- und Ausschaltstellungen frei ist, beweglich ist.
13. Steckdose nach Anspruch 12, bei der das Sperrelement (59) gegen die Sperrstellung von einer Federeinrichtung (60) vorgespannt ist.
14. Steckdose nach Anspruch 12 oder 13, bei der das Sperrelement (59) zur linearen Gleitbewegung zwischen der Blockier- und der Schalterfreigabestellung montiert ist.
15. Steckdose nach einem der Ansprüche 9 bis 14, bei der die Sperrvorrichtung (59, 60) dazu eingerichtet ist, den Schalter auszuschalten, wenn ein Stecker aus der Steckdose herausgezogen wird, während der Schalter sich in der Einschaltstellung befindet.
16. Steckdose nach Anspruch 12,13 oder 14, bei der das Sperrelement (59) eine Nockenfläche (63) enthält, die zur Anlage an das Schaltbetätigungselement (50) kommt und dieses Element in die Ausschaltstellung bewegt, wenn das Sperrelement sich aus der Schalterfreigabestellung in die Sperrstellung bewegt.
EP84303115A 1983-05-10 1984-05-09 Elektrische Steckdosen Expired EP0125141B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84303115T ATE36623T1 (de) 1983-05-10 1984-05-09 Elektrische steckdosen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8312756 1983-05-10
GB838312756A GB8312756D0 (en) 1983-05-10 1983-05-10 Electric sockets

Publications (2)

Publication Number Publication Date
EP0125141A1 EP0125141A1 (de) 1984-11-14
EP0125141B1 true EP0125141B1 (de) 1988-08-17

Family

ID=10542437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84303115A Expired EP0125141B1 (de) 1983-05-10 1984-05-09 Elektrische Steckdosen

Country Status (10)

Country Link
EP (1) EP0125141B1 (de)
AT (1) ATE36623T1 (de)
AU (1) AU571872B2 (de)
DE (1) DE3473537D1 (de)
GB (1) GB8312756D0 (de)
HK (1) HK17789A (de)
IL (1) IL71784A0 (de)
MY (1) MY100520A (de)
ZA (1) ZA843478B (de)
ZW (1) ZW7584A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1280184C (en) * 1987-09-16 1991-02-12 Michel Poirier Safety guard for electrical wall outlet
DE3825654A1 (de) * 1988-07-28 1990-02-01 Bosch Gmbh Robert Sicherheitseinrichtung an einer handwerkzeugmaschine
GB2386480B (en) * 2002-03-15 2005-04-13 Delta Electrical Ltd Switched mains socket

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB434078A (en) * 1935-02-18 1935-08-26 Gustave Edward Marr Improvements in or connected with plug sockets for electrical connections
DE705485C (de) * 1938-03-06 1941-04-30 Max Schulze Sperrleistenanordnung fuer elektrische Steckdosen
GB658936A (en) * 1949-07-26 1951-10-17 George Turnock Ltd Plug and socket connectors and switch sockets for electric circuits
GB904694A (en) * 1960-03-30 1962-08-29 Ass Elect Ind Improvements relating to sliding shutter devices
FR1283102A (fr) * 1961-03-09 1962-01-27 Legrand Ets Perfectionnements aux prises électriques de sécurité
GB954728A (en) * 1962-06-28 1964-04-08 Ass Elect Ind Improvements in shuttered electrical socket outlets
FR1423724A (fr) * 1964-09-17 1966-01-07 S O F I C A Soc Dispositif de sécurité pour prise de courant électrique
GB1551249A (en) * 1976-05-17 1979-08-30 Redditch Plastic Products Ltd Electrical switch
JPS5716177U (de) * 1980-06-26 1982-01-27

Also Published As

Publication number Publication date
HK17789A (en) 1989-03-10
ATE36623T1 (de) 1988-09-15
EP0125141A1 (de) 1984-11-14
GB8312756D0 (en) 1983-06-15
AU571872B2 (en) 1988-04-28
ZW7584A1 (en) 1984-07-25
DE3473537D1 (en) 1988-09-22
ZA843478B (en) 1985-02-27
AU2783084A (en) 1984-11-15
IL71784A0 (en) 1984-09-30
MY100520A (en) 1990-10-30

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