EP0654858B1 - Electrical socket with keying system - Google Patents
Electrical socket with keying system Download PDFInfo
- Publication number
- EP0654858B1 EP0654858B1 EP19940410103 EP94410103A EP0654858B1 EP 0654858 B1 EP0654858 B1 EP 0654858B1 EP 19940410103 EP19940410103 EP 19940410103 EP 94410103 A EP94410103 A EP 94410103A EP 0654858 B1 EP0654858 B1 EP 0654858B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blanking plate
- plug
- studs
- pins
- plate
- 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 - Lifetime
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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
- H01R13/4532—Rotating shutter
Definitions
- the keying function is defined in that the opening of said retractable shutter can only be achieved by a socket outlet plug comprising an additional accessory authorizing its introduction into said base.
- sockets of this type in particular from the French patent application published under No. 2,584,873 which describes a retractable shutter in the shape of a tee blocking access to the cells of the base.
- the so-called polarized plug is characterized by the addition of a third pin of a length slightly greater than the conductive pins. This pin is intended to cooperate with an inclined plane located on the tee leg so as to generate the rotation of the retractable shutter and thus free access to the cells for the conductive pins.
- This system does the desired keying function well, but slightly to the detriment of safety since a single action makes it possible to open the shutter while said opening must require the simultaneous action of two pins to comply with the safety level normally required.
- Document GB-A-2209888 mentions a socket outlet with shutter, the central orifice of which is provided with ramps intended to cooperate with spiral notches formed in a fixed element for ensuring the rotation of the shutter during a thrust exerted by the cards.
- a base does not have the keying function, and the rotation of the shutter towards the withdrawn position occurs as soon as a standard three-pin plug is inserted into the base.
- the present invention proposes to overcome these drawbacks by providing a socket outlet as defined above, which guarantees effective sealing of the access openings to the contact cells, having a security preventing any accidental or voluntary insertion of a pointed element other than the pins of an appropriate socket in said openings for access to the cells and further comprising polarizing means.
- the element 11 for supporting the cells 12 is a molded plastic part, for example of circular section, comprising, in the embodiment shown, three circular openings 17 opening onto the current distribution cells 12 and a ground pin 18 of cylindrical shape arranged perpendicular to the front face of said element 11.
- the cassette 13 is also a molded plastic part having a circular bottom 19 surrounded by a flange, substantially perpendicular to this bottom.
- the diameter of the circular bottom is approximately equal to the diameter of the element 11 for supporting the cells.
- This bottom comprises four circular openings 20 respectively intended for the passage of the two current distribution pins of the plug 32, the ground pin 18 and a polarizing pin 33 which is associated with the plug 32.
- the circular bottom 19 carries a cylindrical element 21 disposed coaxially with respect to a cylindrical base 22. This cylindrical element 21 allows the positioning of the shutter 14 and of the return spring 15 and the base 22 serves to support said shutter.
- This shutter 14 has a substantially annular central portion 23, respectively provided with a circular opening 24, and carrying three arms 25, the ends of which are provided with studs 26 corresponding in position and in size to the openings 29 of the element 16.
- the return spring 15 is of any type, for example of the torsion rod type or the like. In the example shown, it comprises several superimposed turns and two ends 15a and 15b, one of which is fixed or placed in abutment against a fixed element of the faceplate 16 and the other is linked to the shutter 14, preferably to the 'one of the arms 25 of the latter.
- the front faceplate 16 has the form of a quadrangular box provided with an annular rim 27 disposed on its front face 28 which has four circular openings 29 corresponding in position to the four circular openings 20 at the bottom of the cassette 13.
- the plug 32 of known type comprises a body 30 provided with two pins 31 intended for the supply of electric current and a cylindrical bore arranged to receive the earth pin 18 of the socket outlet socket 10. It is further equipped an accessory consisting of a plate 34 provided with three circular orifices 35 and the polarizing pin 33, and which is fixed against the front face of the plug.
- the length of the pin 33 is substantially equal to the length of the pins 31.
- the studs 26, which have a flat front surface inclined relative to the axis of the base, are opposite the circular openings 29 of the faceplate.
- the spring 15 one end of which is made integral with the faceplate and the other end is hooked, for example, to an arm 25 of the shutter, arms and accumulates a sufficient return force to bring this shutter back in its initial position, when the plug 32 is removed from the socket base 10.
- the central part 23 of the shutter has a significant clearance with the cylindrical element 21.
- the shutter is more or less unstable in equilibrium on the base 22. It follows that, if a operator tries to introduce into the socket base an inappropriate plug, for example not provided with the coding pin 33, the shutter 14 switches relative to its axis, but does not rotate. On the contrary, the stud 26 corresponding to the coding pin engages in the corresponding opening 29 of the faceplate, which prevents any rotation of the shutter. The polarization pin is therefore mandatory in this configuration. Any improper plug cannot cause the shutter to open. In practice, this amounts to saying that the shutter is in equilibrium on a fictitious point located on its axis.
- any attempt to engage a single metal element in an orifice 29, causes, by tilting the shutter 14, the engagement of the other two studs 26 in their respective openings 29, thereby blocking rotation.
- This principle can be applied to equipment with a retractable three-phase plug shutter.
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Description
La présente invention concerne un socle de prise de courant comportant un élément de support pour des alvéoles de distribution de courant, un plastron frontal agencé pour recevoir une fiche munie de broches d'un équipement électrique, une cassette disposée entre ledit élément de support et ledit plastron frontal et contenant un obturateur escamotable conçu pour occuper une position de repos dans laquelle il obture des ouvertures ménagées dans le plastron frontal et prévues pour donner auxdites broches un accès auxdits alvéoles de distribution de courant, et une position retirée dans laquelle il libère lesdites ouvertures, ledit obturateur comportant :
- des plots agencés pour s'engager au moins partiellement dans lesdites ouvertures du plastron, lesdits plots correspondant aux broches de ladite fiche,
- des moyens pour générer la rotation de l'obturateur autour de son axe, en réponse à une poussée axiale exercée simultanément par lesdites broches de la fiche sur lesdits plots,
- une partie centrale ayant une ouverture centrale circulaire, et au moins trois bras dont les extrémités portent chacun l'un desdits plots.
- studs arranged to engage at least partially in said openings of the faceplate, said studs corresponding to the pins of said plug,
- means for generating the rotation of the shutter about its axis, in response to an axial thrust exerted simultaneously by said pins of the plug on said pads,
- a central part having a circular central opening, and at least three arms, the ends of which each carry one of said studs.
La fonction de détrompage est définie en ce que l'ouverture dudit obturateur escamotable ne peut être réalisée que par une fiche de prise de courant comportant un accessoire supplémentaire autorisant son introduction dans ledit socle.The keying function is defined in that the opening of said retractable shutter can only be achieved by a socket outlet plug comprising an additional accessory authorizing its introduction into said base.
On connaît des prises de courant de ce type, notamment par la demande de brevet français publiée sous le Nº 2 584.873 qui décrit un obturateur escamotable en forme de té obturant l'accès aux alvéoles du socle. La fiche dite détrompée est caractérisée par l'adjonction d'une troisième broche d'une longueur légèrement supérieure aux broches conductrices. Cette broche est destinée à coopérer avec un plan incliné situé sur la jambe de té de façon à engendrer la rotation de l'obturateur escamotable et ainsi dégager l'accès aux alvéoles pour les broches conductrices. Ce système réalise bien la fonction de détrompage recherchée, mais légèrement au détriment de la sécurité puisqu'une seule action permet d'ouvrir l'obturateur alors que ladite ouverture doit réclamer l'action simultanée de deux broches pour être conforme au niveau de sécurité normalement exigé.There are known sockets of this type, in particular from the French patent application published under No. 2,584,873 which describes a retractable shutter in the shape of a tee blocking access to the cells of the base. The so-called polarized plug is characterized by the addition of a third pin of a length slightly greater than the conductive pins. This pin is intended to cooperate with an inclined plane located on the tee leg so as to generate the rotation of the retractable shutter and thus free access to the cells for the conductive pins. This system does the desired keying function well, but slightly to the detriment of safety since a single action makes it possible to open the shutter while said opening must require the simultaneous action of two pins to comply with the safety level normally required.
Le document GB-A-2209888 mentionne un socle de prise de courant à obturateur dont l'orifice central est pourvu de rampes destinées à coopérer avec des encoches en spirale ménagées dans un élément fixe pour assurer la rotation de l'obturateur lors d'une poussée exercée par les fiches. Un tel socle ne possède pas la fonction de détrompage, et la rotation de l'obturateur vers la position retirée intervient dès qu'une fiche standard à trois fiches est introduite dans le socle.Document GB-A-2209888 mentions a socket outlet with shutter, the central orifice of which is provided with ramps intended to cooperate with spiral notches formed in a fixed element for ensuring the rotation of the shutter during a thrust exerted by the cards. Such a base does not have the keying function, and the rotation of the shutter towards the withdrawn position occurs as soon as a standard three-pin plug is inserted into the base.
La présente invention se propose de pallier ces inconvénients en réalisant un socle de prise de courant tel que défini ci-dessus, qui garantit une obturation efficace des ouvertures d'accès aux alvéoles de contact, présentant une sécurité empêchant toute insertion accidentelle ou volontaire d'un élément pointu autre que les broches d'une prise appropriée dans lesdites ouvertures d'accès aux alvéoles et comportant en outre des moyens de détrompage.The present invention proposes to overcome these drawbacks by providing a socket outlet as defined above, which guarantees effective sealing of the access openings to the contact cells, having a security preventing any accidental or voluntary insertion of a pointed element other than the pins of an appropriate socket in said openings for access to the cells and further comprising polarizing means.
A cet effet, le socle de prise de courant selon l'invention est caractérisé en ce que :
- ledit obturateur se trouve en équilibre sur un point fictif localisé sur son axe grâce à la partie centrale en forme de calotte sphérique, l'ouverture de la partie centrale de l'obturateur ayant un diamètre supérieur au diamètre d'un élément cylindrique solidaire de la cassette, sur lequel est monté ledit obturateur de manière à ménager un jeu entre cet élément cylindrique et ledit obturateur,
- une broche de détrompage est montée sur la fiche pour autoriser la rotation de l'obturateur vers la position retirée.
- said shutter is in equilibrium on a fictitious point located on its axis thanks to the central part in the form of a spherical cap, the opening of the central part of the shutter having a diameter greater than the diameter of a cylindrical element secured to the cassette, on which said shutter is mounted so as to provide a clearance between this cylindrical element and said shutter,
- a coding pin is mounted on the plug to allow the shutter to rotate to the removed position.
La présente invention et ses principaux avantages seront mieux compris en référence à la description d'une forme de réalisation préférée et aux dessins annexés donnés à titre d'exemple non limitatifs dans lesquels :
- la figure 1 représente une vue éclatée d'une forme de réalisation préférée du socle de prise de courant selon l'invention,
- la figure 2 représente une vue en coupe partielle du socle de la figure 1,
- les figures 3A et 3B sont des vues en coupe axiale illustrant les phases successives d'embrochage d'une fiche dans le socle de prise de courant selon l'invention,
- la figure 4 est une vue en perspective d'une fiche embrochée dans le socle de prise, et correspondant à la vue en coupe de la figure 3C,
- la figure 5 est une vue en plan illustrant la position de l'obturateur à la fin de la phase d'embrochage d'une fiche dans le socle de prise.
- FIG. 1 represents an exploded view of a preferred embodiment of the socket outlet according to the invention,
- FIG. 2 represents a view in partial section of the base of FIG. 1,
- FIGS. 3A and 3B are views in axial section illustrating the successive phases of plugging in a plug into the socket outlet according to the invention,
- FIG. 4 is a perspective view of a plug plugged into the socket, and corresponding to the sectional view of FIG. 3C,
- Figure 5 is a plan view illustrating the position of the shutter at the end of the plug-in phase of a plug in the socket.
Ce socle est destiné à recevoir une fiche 32 qui sera décrite plus en détail ci-dessous.
L'élément 11 de support des alvéoles 12 est une pièce en matière synthétique moulée, par exemple de section circulaire, comportant, dans la forme de réalisation représentée, trois ouvertures circulaires 17 débouchant sur les alvéoles de distribution de courant 12 et une broche de terre 18 de forme cylindrique disposée perpendiculairement à la face frontale dudit élément 11.This base is intended to receive a
The
La cassette 13 est également une pièce en matière synthétique moulée comportant un fond circulaire 19 entouré d'un rebord, sensiblement perpendiculaire à ce fond. Le diamètre du fond circulaire est approximativement égal au diamètre de l'élément 11 de support des alvéoles. Ce fond comporte quatre ouvertures circulaires 20 respectivement destinées au passage des deux broches de distribution de courant de la fiche 32, de la broche de terre 18 et d'une broche de détrompage 33 qui est associée à la fiche 32. En son centre, le fond circulaire 19 porte un élément cylindrique 21 disposé coaxialement par rapport à une embase cylindrique 22. Cet élément cylindrique 21 permet le positionnement de l'obturateur 14 et du ressort de rappel 15 et l'embase 22 sert d'appui audit obturateur.The
Cet obturateur 14 comporte une partie centrale 23 sensiblement annulaire, respectivement pourvue d'une ouverture circulaire 24, et portant trois bras 25 dont les extrémités sont pourvues de plots 26 correspondant en position et en dimensions aux ouvertures 29 de l'élément 16.This
Le ressort de rappel 15 est de type quelconque, par exemple du type boudin à torsion ou similaire. Dans l'exemple représenté, il comporte plusieurs spires superposées et deux extrémités 15a et 15b dont l'une est fixée ou placée en butée contre un élément fixe du plastron 16 et l'autre est liée à l'obturateur 14, de préférence à l'un des bras 25 de ce dernier.The
Le plastron frontal 16 a la forme d'un boîtier quadrangulaire pourvu d'un rebord annulaire 27 disposé sur sa face frontale 28 qui comporte quatre ouvertures circulaires 29 correspondant en position aux quatre ouvertures circulaires 20 du fond de la cassette 13.The
La fiche 32 de type connu comporte un corps 30 pourvu de deux broches 31 destinées à l'alimentation en courant électrique et d'un alésage cylindrique agencé pour recevoir la broche de terre 18 du socle de prise de courant 10. Elle est en outre équipée d'un accessoire constitué d'une plaque 34 pourvue de trois orifices circulaires 35 et de la broche de détrompage 33, et qui est fixée contre la face frontale de la fiche. La longueur de la broche 33 est sensiblement égale à la longueur des broches 31.The
Au repos les plots 26, qui présentent une surface frontale plane inclinée par rapport à l'axe du socle, sont en face des ouvertures circulaires 29 du plastron.At rest, the
Dans une première phase correspondant au début de l'embrochage de la fiche 32 dans le socle de la prise de courant, les deux broches 31 d'alimentation en courant électrique et la broche de détrompage 33 prennent simultanément appui contre les plots 26 de l'obturateur. Cette phase est représentée par la figure 3A.In a first phase corresponding to the start of plugging in of the
Dans la phase suivante de l'embrochage de la fiche 32, illustrée par les figures 3B, 4 et 5, la contrainte axiale exercée simultanément par les broches d'alimentation 31 et la broche de détrompage 33 sur les plots 26, a pour effet de provoquer une rotation de l'obturateur 14 autour de son axe, matérialisé par l'élément cylindrique 21. Ce mouvement de rotation est obtenu par exemple grâce à une géométrie particulière des plots 26 qui présentent à leur surface frontale un profil de rampe inclinée. La poussée exercée par les bouts arrondis des broches de la fiche sur ces rampes inclinées engendre un couple d'entraînement en rotation de l'obturateur. Au cours de cette rotation, le ressort 15, dont une extrémité est rendue solidaire du plastron et l'autre extrémité est accrochée par exemple à un bras 25 de l'obturateur, s'arme et accumule une force de rappel suffisante pour ramener cet obturateur dans sa position initiale, au moment du retrait de la fiche 32 hors du socle de la prise 10.In the next phase of plugging in the
On notera que la partie centrale 23 de l'obturateur présente un jeu non négligeable avec l'élément cylindrique 21. De ce fait, l'obturateur est en équilibre plus ou moins instable sur l'embase 22. Il en résulte que, si un opérateur tente d'introduire dans le socle de la prise une fiche non appropriée, par exemple non munie de la broche de détrompage 33, l'obturateur 14 bascule par rapport à son axe, mais ne tourne pas. Au contraire, le plot 26 correspondant à la broche de détrompage s'engage dans l'ouverture 29 correspondante du plastron, ce qui empêche toute rotation de l'obturateur. La broche de détrompage est donc obligatoire dans cette configuration. Toute fiche non appropriée ne peut engendrer l'ouverture de l'obturateur. Dans la pratique, cela revient à dire que l'obturateur est en équilibre sur un point fictif localisé sur son axe.It will be noted that the
De même, toute tentative d'engager un seul élément métallique dans un orifice 29, provoque, par basculement de l'obturateur 14, l'engagement des deux autres plots 26 dans leurs ouvertures 29 respectives, bloquant ainsi la rotation.Similarly, any attempt to engage a single metal element in an
Ce principe peut être appliqué à l'équipement avec obturateur escamotable de prises triphasées.This principle can be applied to equipment with a retractable three-phase plug shutter.
Claims (4)
- A current socket base comprising a support element (11) for current distribution recesses (12), a front plate (16) arranged to receive a plug equipped with pins (31) of a piece of electrical equipment, a cassette (13) arranged between said support element and said front plate and containing a retractable blanking plate (14) designed to occupy a rest position in which it blanks off openings (29) arranged in the front plate and intended to give said pins access to said current distribution recesses, and a retracted position in which it frees said openings, said blanking plate (14) comprising :- studs (26) arranged to engage at least partially in said openings (29) of the front plate (16), said studs corresponding to the pins (31, 33) of said plug (32),- means for generating rotation of the blanking plate around its axis, in response to an axial thrust exerted simultaneously by said pins of the plug on said studs,- a central part (23) having a circular central opening (24) and at least three arms (25) whose ends each bear one of said studs (26),characterized in that :- said blanking plate (14) is in equilibrium on a fictitious point located on its axis by means of the central part (23) in the form of a spherical cap, the opening (24) of the central part (23) of the blanking plate (14) having a diameter greater than the diameter of a cylindrical element (21) securedly united to the cassette (13), on which said blanking plate is mounted in such a way as to arrange a clearance between this cylindrical element and said blanking plate,- an error prevention pin (33) is fitted on the plug (32) to allow rotation of the blanking plate (14) to the retracted position.
- The base according to claim 1, characterized in that it comprises a return spring (15) arranged to move the blanking plate back to its initial position after the plug (32) has been withdrawn, said spring (15) comprising several circular turns, one end (15a) rendered securedly united to the front plate (16) and another end (15b) securedly united to the blanking plate (14).
- The base according to claim 1, characterized in that the cassette (13) comprises a base (22) coaxial to said cylindrical element (21) to act as bearing point for rotation and rocking of the blanking plate (14).
- The base according to claim 1, characterized in that said means for generating rotation of the blanking plate (14) around its axis comprise inclined ramps arranged respectively on the front surfaces of each of said studs (26).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9314275A FR2713023B1 (en) | 1993-11-24 | 1993-11-24 | Keyed socket outlet. |
| FR9314275 | 1993-11-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0654858A1 EP0654858A1 (en) | 1995-05-24 |
| EP0654858B1 true EP0654858B1 (en) | 1997-10-22 |
Family
ID=9453342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19940410103 Expired - Lifetime EP0654858B1 (en) | 1993-11-24 | 1994-11-18 | Electrical socket with keying system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0654858B1 (en) |
| DE (1) | DE69406394D1 (en) |
| ES (1) | ES2110203T3 (en) |
| FR (1) | FR2713023B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2738955B1 (en) * | 1995-09-15 | 1997-10-24 | Schneider Electric Sa | FIXED ELECTRICAL OUTLET |
| FR2833111B1 (en) * | 2001-12-05 | 2006-09-15 | Legrand Sa | CURRENT POWER SOCKET WITH ALVEOL SHUTTER AND RANGE COMPRISING SUCH A BASE |
| KR101241246B1 (en) * | 2011-12-22 | 2013-03-15 | 노성태 | Safety electric outlet |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584873B1 (en) * | 1985-07-11 | 1990-03-23 | Arnould App Electr | ELECTRICAL CONNECTION SYSTEM FOR A SPECIFIC POWER DISTRIBUTION NETWORK, AND ADAPTER FOR CORRESPONDING ELECTRICAL CONNECTION PLUG AND SOCKET |
| GB8721769D0 (en) * | 1987-09-16 | 1987-10-21 | Conblock Electrical Ltd | Electrical socket |
| GB2260863B (en) * | 1991-10-23 | 1995-06-21 | Mk Electric Ltd | An electrical socket |
-
1993
- 1993-11-24 FR FR9314275A patent/FR2713023B1/en not_active Expired - Fee Related
-
1994
- 1994-11-18 EP EP19940410103 patent/EP0654858B1/en not_active Expired - Lifetime
- 1994-11-18 ES ES94410103T patent/ES2110203T3/en not_active Expired - Lifetime
- 1994-11-18 DE DE69406394T patent/DE69406394D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE69406394D1 (en) | 1997-11-27 |
| ES2110203T3 (en) | 1998-02-01 |
| FR2713023A1 (en) | 1995-06-02 |
| EP0654858A1 (en) | 1995-05-24 |
| FR2713023B1 (en) | 1995-12-22 |
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