WO2012038189A1 - Connector for electrical apparatus - Google Patents

Abstract

The present invention relates to a wall connector for an electrical apparatus comprising: - a first piece (10) for being fixed permanently into a wall surface provided for this purpose, - a second piece (12), for being secured and connected to an electrical apparatus. The pieces each comprise elements of an electrical contactor and of a bayonet‑type fastening member. The whole is devised so as to allow the fitting of the electrical apparatus in complete safety, without any tooling and with no degradation of the wall surface.

Description

 Description

 Connector for electrical appliance

Technical area

The present invention relates to the general technical field of electrical apparatus. More particularly, it relates to a connector for installing an electrical appliance on a wall support, this term including both the walls as such, ceilings or floors or other walls.

State of the art

 For example, the installation of lamps in a dwelling is always a delicate task for everyone who is not a professional building or electricity. It is necessary to drill the ceiling in precise locations, then connect the electrical wires protruding from the ceiling and installed in the building. Finally, it is necessary to fix the support or the base of the lamp by screwing it in the holes previously made. Not only, such an operation may be relatively difficult for a person who is not skilled in DIY, or who is not equipped properly, but in addition, the replacement of the lamps can cause damage in the ceilings when It is necessary to redo holes, the previously performed locations can rarely be reused. The multiplication of holes can be a problem for rental housing, in which tenants install their lamps and remove them leaving the housing. After a few successive operations, the owners may have to redo the ceilings or the damaged walls.

 Obviously, the electrical connection of the lamp to the network may present risks if the son remain powered during handling.

The installation of other electrical devices, intended to be permanently installed, may have the same drawbacks. For example, fans, surveillance cameras, air-conditioning systems require the same requirements. For example, it is known from the document US Pat. No. 6,780,049, a wall-mounted electrical connector that makes it possible to rapidly mount a fixing and an electrical connection to the ceiling. The mechanical assembly of the connector is obtained using a bayonet assembly having an inclined ramp and a positioning spring acting on a portion of the connector. This type of connector has a number of disadvantages. Indeed, to assemble such a connector, it is first necessary to align the male connector on the female connector. In addition, to perform such an alignment, the connector must be protruding apparent on its support, thus making accessible the plugs. Accidental contact with the cards could then alter their integrity. The spring must also be dimensioned extremely accurately to ensure the proper engagement of the plugs. The inclined ramp can also lead to accidental separation of the two parts of the connector, for example under the effect of a heavy electrical appliance and when the lugs are only partially engaged in inclined ramps. The security of use of such a connector is therefore not optimal.

 Disclosure of the invention

 The present invention aims to provide a connector to solve the aforementioned problems.

An object of the present invention is therefore to provide a multifunctional electrical connector, reliable and perfectly secure.

Another object of the present invention is to provide an electrical connector having assembly phases extremely simple and intuitive for the user.

Another object of the present invention is to provide an economical electrical connector and whose aesthetic appearance is substantially improved.

 The purpose and objects assigned to the invention are achieved by means of a wall connector for electrical apparatus comprising:

a first piece to be fixed permanently in a wall wall provided for this purpose, said first piece comprising: a cylindrical housing defining a drum of internal diameter D,

a first part of an electric contactor intended to be connected to a source of electricity, and

 a first element of a bayonet coupling member located on the housing shaft,

 a second piece, to be secured to and connected to an electrical apparatus, comprising:

 a circular portion of outside diameter d, with d <D,

 a second part of an electrical contactor, rotatably mounted on said second part, and having a first end adapted to cooperate with the first part of the contactor located on the first part and a second end intended to be integral with an electrical appliance, and

 a second element of a bayonet hooking member arranged to cooperate with said first element of the first part, said first and second parts of the electric contactor on the one hand, and said first and second elements of the body of hooking, on the other hand, are arranged in such a way that the first and second parts of the electrical contactor assemble during the assembly of the first and second elements of the fastening member.

 [001 1] According to an embodiment of the connector according to the invention, the second element of the fastening member comprises at least one groove formed on the outer face of the circular portion, the first element of the body of hooking comprising at least one protruding lug, located on the inner face of the cylindrical housing, the groove comprising a first portion located perpendicularly to the plane defined by the second part and a second portion, extending the first, oriented parallel to said plane, said groove being dimensioned so as to allow the engagement of said lug.

According to an exemplary embodiment of the connector according to the invention, the second portion of the contactor comprises, on its outer periphery, an edge, formed longitudinally in the contactor axis, said ridge being intended to cooperate with a groove that includes the first part of the contactor, to guide the movement of the two parts of the contactor during the insertion of the plugs in the holes.

The purpose and objects assigned to the invention are also achieved by means of a wall connector for electrical apparatus comprising:

 a first piece to be fixed permanently in a wall wall provided for this purpose, said first piece comprising:

 a cylindrical housing defining a drum of internal diameter D,

a first part of an electric contactor comprising holes,

a first element of a bayonet coupling member located on the housing shaft,

 a second piece, comprising:

 a circular portion of outside diameter d, with d <D,

 a second part of an electrical contactor, rotatably mounted on said second part, and having a first end comprising plugs adapted to cooperate with the first part of the contactor located on the first part and a second end intended to be integral with an electrical appliance, and

 a second element of a bayonet hooking member arranged to cooperate with said first element of the first piece,

said first and second parts on the one hand, and said first and second elements, on the other hand, being arranged in such a way that the first and second parts of the electrical contactor assemble during assembly of the first and second elements of the the fastening member, characterized in that the second element of the fastening member comprises at least one groove formed on the outer face of the circular portion, the first element of the fastening member comprising at least one protruding lug, located on the inner face of the cylindrical housing, the groove comprising a first portion located perpendicular to the plane defined by the second part and a second portion, extending the first portion, oriented parallel to said plane, said groove being dimensioned so as to allow the engagement of said ergot, the second part comprising on its outer periphery, an edge, formed longitudinally, in the axis of the contactor, said edge being intended to cooperate with a groove that includes the first part of the contactor, to guide the movement of the two parts during the inserting the plugs into the holes.

 According to an embodiment of the connector according to the invention, the first part of the contactor does not exceed the cylindrical housing.

 According to an embodiment of the connector according to the invention, the length of the first portion is at least equal to the necessary depression to allow electrical contact of the two parts of the connector.

 According to an embodiment of the connector according to the invention, the angular position of the second part of the connector with reference to the second part, is indexed.

According to an embodiment of the connector according to the invention, the first part is the female part of the contactor and in that the second part of the contactor is the male part of the contactor.

According to an embodiment of the connector according to the invention, the contactor is a four-pin contactor.

According to an embodiment of the connector according to the invention, the second part of the contactor comprises an annular groove cooperating with the edge of an opening that comprises the second part, allowing a better engagement and a better rotation of the first portion in said opening.

The purpose and objects assigned to the invention are also achieved by means of an assembly comprising:

 a first piece of a wall connector for an electrical appliance, for being fixed permanently in a wall wall provided for this purpose, said first piece comprising:

 a cylindrical housing defining a drum of internal diameter D,

a first part of an electric contactor intended to be connected to a source of electricity, and a first element of a bayonet coupling member located on the housing shaft,

 a cover intended to mask said housing, comprising:

 - A circular portion of outer diameter d, with d <D, and - a second element of a bayonet hooking member arranged to cooperate with said first element of the first piece.

The purpose and objects assigned to the invention are achieved by means of a mounting kit of a wall connector, comprising a first piece to be fixed permanently in or on a wall wall provided for this purpose said first member having a cylindrical housing defining a barrel of inner diameter D, a first portion of an electrical contactor having holes, a first member of a bayonet engaging member on the housing barrel, and means for fixing to fix said first piece on or in the wall wall.

The purpose and objects assigned to the invention are achieved with the aid of a mounting kit for connecting an electrical device to a wall connector, comprising a second piece to be connected to an electrical apparatus, said second piece a circular portion of external diameter d, with d <D, a second portion of an electrical contactor, rotatably mounted on said second part, and having a first end having plugs adapted to cooperate with the first part of the contactor located on the first piece and a second end intended to be secured to an electrical apparatus and a second element of a bayonet hooking member arranged to cooperate with a first element of a first wall piece having a cylindrical housing defining a diameter drum interior D.

The mounting kit comprises for example an electrical device, possibly already secured and connected to said second part.

More specifically, the invention relates to a wall connector for all types of electrical appliances including chandeliers, fans, surveillance cameras or extension cables, requiring electrical and mechanical connection. An advantage of the electrical connector according to the invention lies in its great simplicity of handling. The electrical and mechanical connections are intuitively obtained without requiring special verification of the pre-positioning of the component parts of the connector.

Another advantage of the electrical connector according to the invention lies in the fact that it is a multifunctional connector. This connector can be used either for connecting and supporting various electrical devices, or for connecting an extension cable. The connector according to the invention can therefore be used as a simple electrical outlet.

 Another advantage of the connector according to the invention is related to the possibility of integrating it, in part, directly into walls or walls when building buildings or equip walls or walls of existing buildings. The connector according to the invention therefore adapts to any type of new or existing electrical installations.

 The connector according to the invention can for example equip an electrical device to purchase, be sold as an option with an electrical device or be sold separately for the connection of old devices.

 [0029] Other advantages?

Brief description of the drawings

 Other details of the invention will appear more clearly on reading the description which follows, made with reference to the accompanying drawing in which:

 FIGS. 1 and 2 show in perspective the first and second parts of a connector according to the invention, with enlarged detail views of the contactors,

 FIG. 3 represents a sectional view of a connector according to the invention, connected to the base of a lamp,

 FIG. 4 shows a cache of a connector that can be used in the context of the invention,

FIG. 5 represents an alternative embodiment of the first part of a connector according to the invention and illustrated in FIG. and FIG. 6 represents an alternative embodiment of the cache of FIG. 4.

Mode (s) of realization of the invention

The structurally and functionally identical elements and present in several separate figures, are assigned a same numerical or alphanumeric reference.

The connector according to the invention comprises two main parts. A first piece 10 to be fixed permanently in a wall wall 9 provided for this purpose, and a second piece 12, to be secured and electrically connected to an electrical appliance.

More specifically, the first part 10 comprises a cylindrical housing 14 defining a barrel of inner diameter D. This housing 14 is provided with a bottom 14a, pierced, typically in its center, an opening 14b. The latter allows the passage of a first portion 18 of an electric switch, intended to be connected to a source of electricity. The contactor is mounted integral in the opening 14b, for example by screwing through openings provided for this purpose or by driving and gluing.

This contactor can be of different types. It will be preferred to provide in the first piece 10, a female contactor, advantageous in terms of safety because it prevents contact with an electrically connected zone. The contactor can be a four-pin contactor.

The first portion 18 comprises a first portion 18a engaged in the opening 14b and receiving four connection pads not visible in the drawing, with the orifices and clamping screws required and known to those skilled in the art.

It comprises a second portion 18c, separated from the first 18a by a flange 18d larger than the opening of the bottom 14a, the flange 18d bearing on the bottom 14a, so that the second portion 18c takes place in the housing 14, without however exceeding it. The flange receives holes for screwing the connector. The second portion 18c is essentially cylindrical. It comprises four holes 18e each provided with a conductive portion, respectively electrically connected to one of the connection pads. The first part 18 of the contactor and the holes 18e are perpendicular to the plane defined by the bottom 14a of the first part 10. On its outer periphery, the second portion 18c of the first part 18 of the contactor comprises a groove 18f, arranged longitudinally, in the axis of the contactor, whose role will appear later.

The bottom 14a may also include fixing holes 20, to allow its permanent installation in a wall wall. The latter is advantageously provided with a cavity into which electrical wires of the electrical network of the housing open. The cavity is sized to accommodate the first piece 10 which, preferably, will be installed by a building professional, ideally during the construction of housing. The cavity is then made, for example, by casting the wall wall around a jig with adequate dimensions. Once the template removed, the first part 10 can be installed in the cavity, the first part 18 of the contactor being electrically connected to the electrical son of the network. The first piece 10 can be screwed into the cavity through the fixing holes 20.

 The first piece 10 further comprises a first element 22a of a bayonet hooking member located on the shaft of the housing 14 (see for example Figure 1). In the embodiment proposed in the drawing, the first element 22a is a male element, taking the form of two lugs located projecting on the shaft of the housing 14. These lugs are typically arranged at 180 ° to one another, but other arrangements are possible, especially to allow or not several positions to the second part 12 which, as will be understood below, is intended to engage on the lugs.

The second piece 12, visible in detail in Figure 2, comprises a circular portion 24 of outer diameter d, with d <D. Thus, the second part 12 can engage inside the cylindrical housing 14 of the first part 10. It is not necessary that the diameters d and D are perfectly adjusted, a slight clearance can be left between the two, to facilitate the insertion of the second piece 12 in the first 10, without jamming. The second part 12 further comprises a second portion 26 of an electric contactor. Preferably, the second part 12 also defines a housing 28 similar to that described above with respect to the first part 10. Thus, this housing 28 is provided with a bottom 28a, pierced, typically at its center, with a opening 28b. The latter allows the passage of the second portion 26 of the electric switch.

As will be understood later, this second part 26 is rotatably mounted on the second part 12. The second part 26 of the contactor can be advantageously screwed fat on the second part 12. For this purpose, the latter also includes a flange 26f provided with holes for the passage of screws, which pass through apertures arc concentric with the opening 28b, formed in the bottom 28a. Braked nuts are mounted on the screws so as to grip the bottom 28a between the nuts and the screw head. The tightening of the nuts makes it possible to adjust the friction which is exerted between the second part 26 of the contactor and the second part

12, thereby maintaining an angular position of the contactor with reference to the second part 12, while allowing the relative rotation of these parts.

 The second part 26 of the contactor comprises:

 a first end 26a located in the housing 28 of the second part 12 and adapted to cooperate with the first part 18 of the contactor located on the first part 10, and

 a second end 26b intended to be fixed and connected to an electrical appliance.

To cooperate with the first part 18 of the contactor, the second portion 26 is preferably of the male type. Since, when this second part 26 of the contactor is accessible, it is not electrically connected, so there is no risk that a person receives an electric discharge by contact with the male part.

The switch may be a four-pin contactor. It comprises a first portion 26c mounted to rotate, by friction, in the opening 28b and receiving four connection pads not visible in the drawing, with the orifices and clamping screws required and known to those skilled in the art. It comprises a second portion 26e, separated from the first 26c by a flange 26f larger than the opening 28b of the bottom 28a, the flange 26f bearing on the bottom 28a, so that the second portion 26e takes place in the housing 28 , without however exceeding it. Adjoining the flange 26f, on the side inserted in the second part 12, the second part 26 of the contactor may comprise an annular groove not visible in the drawing cooperating with the edge of the opening 28b of the second part 12, allowing a better engagement and a better rotation of the first portion 26c in the opening 28b. The second portion 26e is essentially cylindrical. It comprises four plugs 26h, respectively connected to one of the connection pads. The second part 26 of the contactor and the pins are perpendicular to the plane defined by the bottom 28a of the second piece 12.

On its outer periphery, the second portion 26e of the contactor comprises an edge 26i, extending longitudinally in the axis of the contactor. This edge 26i is intended to cooperate with the groove 18f of the first part 10, to guide the movement of the two parts of the contactor during the insertion of the plugs 26h in the holes 18e. This insertion causes a tightening of the plugs 26h in the holes 18e, allowing a good maintenance, almost without play, of the two parts of the contactor.

The second part 12 further comprises a second element 22b of a bayonet hooking member arranged to cooperate with said first element 22a of the first part 10. In the embodiment proposed in the drawing, the second element 22b is a female element taking the form of two grooves formed on the outer face of the circular portion 24. Each groove comprising a first portion 22c located perpendicularly to the plane defined by the second piece 12 and a second portion 22d, extending the first, oriented parallel to said plan. The grooves are positioned and dimensioned to allow engagement of the lugs. One could have only one lug, able to cooperate with one or more grooves, offering, if the contactor the allows the possibility that the first and second parts can be assembled in several relative angular positions.

 Naturally, the first 18 and second 26 parts of the electric switch, on the one hand, and the first 22a and second 22b elements of the fastener, on the other hand, are arranged so that the second part 12 can be assembled on the first 10. In other words, the first 18 and second 26 parts of the electric switch must be able to assemble during assembly of the first 22a and second 22b elements of the body of hanging. The pins 26h are therefore positioned opposite holes 18e when the lugs are located opposite the first portion 22c of the grooves.

 Thus, to assemble the second piece 12 on the first 10 is introduced the circular portion 24 of the second piece 12 in the cylindrical housing 14 of the first 10, turning said second piece 12 to align the pins and the first portions 22c of the grooves of the bayonet hooking member. If the second part 26 of the contactor is indexed (which is normally the case thanks to its free mounting in rotation, but with friction), the plugs 26h are then in front of the holes 18e. Moreover, marks may be provided for indexing the angular position of the second portion 26 of the contactor. If necessary, it may be necessary to reindex the position of the second part 26 of the contactor. At the same time, the cylindrical part of the second part 12 is thus inserted in the housing 14 of the first, the plugs 26h are inserted in the holes 18e of the contactor and the lugs are inserted in the first portion of the groove. The length of the first portion is at least equal to the depression of the two parts of the connector, that is to say the stroke of the second part 12 to allow sufficient contact between the plugs 26h and 18e holes of the contactor .

Then, to secure the assembly, the second part 12 is pivoted with reference to the first 10 so that the lugs move in the second portion 22d of the groove. This pivoting can be done without damaging the connector, thanks to the rotational mounting of the second part 26. The latter pivots during the movement of the second piece 12, so as not to deform the sheets 26h. During disassembly, the second portion 26 of the switch also pivots and returns to its initial indexed position, to maintain the proper orientation of the second portion 26 of the contactor with reference to the latching member.

 Advantageously, the second part 12 is secured to an electrical device to be installed. Figure 3 shows the assembly of the second piece 12 and a lamp. The support of the latter is fixed, for example by screwing, to the second piece 12. Where appropriate, one can have an adapter 30 for connecting the second part 12 and the device. The assembly of the apparatus and the second piece 12 is preferably done by the manufacturer of the apparatus, in order to simplify as much as possible the work to be performed by the end user. If necessary, a kit comprising a second part 12 and, optionally, an adapter 30 may be marketed, to allow its mounting on an existing device and without these elements.

 In addition, the first piece 10 of the connector according to the invention can advantageously be used to receive a cover 31, visible in Figure 4 when the power source is not used. The cover 31 can thus take up the dimensions of the second part 12, as described above, particularly at the circular portion 24 of outer diameter d, with d <D.

The cover 31 also comprises a second element of a bayonet hooking member arranged to cooperate with said first element of the first part 10. In the present case, according to the example, the cover 31 comprises similar grooves. to those described above. The face of the cover 31, intended to be located on the side of the first part 10, is devoid of electric contactor. The other face of the cover 31 proposes, for example, a uniform disc, of various colors and aspects. Thus, when no electrical device is connected, there are no wires that protrude, or even unsightly cavities. FIG. 5 illustrates an alternative embodiment of the first piece 10 of FIG. 1. In the embodiment of FIG. 5, the barrel of the housing 14 has a cylindrical wall in which a sliding ball 33 is mounted in a chamber 34 of the piercing type. The ball 33 is subjected to the action of a spring 35. The ball 33 is in a position partially constrained projecting on the upper edge of the shaft forming the housing 14 when the first piece 10 is separated from the second piece 12 or the cache 31. A mounting element 36, of the screw type, allows one hand to maintain the spring 35 and the ball 33 in the chamber 34 and secondly to compress the spring 35 so as to pre-position the ball 33 partially projecting.

 FIG. 6 illustrates an alternative embodiment of the cover 31, which has a cavity 32 intended to partially house the ball 33 when the first part 10 and the cover 31 are assembled and that the first elements 22a of the body hooking are engaged at the bottom of the second elements 22b of the fastening member. The assembly operation therefore ends with the engagement of the ball 33 in the cavity 32 under the effect of the spring 35. The additional snap force thus necessary to obtain such a commitment increases the reliability of assembly and provide the user with sensory information that the engagement is properly performed. Before the arrival in the latching position, the ball 33 is constrained in the chamber 34 by the cover 31.

Such a cavity 32 formed in the cylindrical portion 24, may also be provided on the second part 12 according to the invention.

As a further alternative, the second portion 22d may also include a notch extending substantially in a direction orthogonal to the extension of the second portion 22d. The first elements 22a of the latching member can thus be partially housed in said notches when said first elements 22a of the latching member are engaged at the bottom of the second elements 22b of the latching member. Such notches associated with optimal sizing parts, also make it possible to perform a latching operation, if necessary simultaneously with the snap-in of the ball 33.

The electrical connector according to the invention has the advantage that the connection and disconnection steps are particularly simple and intuitive for the user.

 Indeed, the connector according to the invention allows to implement a particularly simple assembly method, reliable and intuitive. The assembly according to the invention thus consists of:

- perform a first axial movement corresponding to an axial engagement of the second part 12 in the cylindrical portion 24 until contact between the male connector and the female connector,

- Perform a relative rotation to find the engagement position of the edge 26i in the groove 18,

- Perform a second axial movement corresponding to a partial axial engagement (before electrical connection) of the plugs 26h in the holes 18e and until the arrival in abutment of the first hooking elements 22a on the upper edge of the cylindrical portion 24,

- Perform a relative rotation until the coincidence of the first hooking elements 22a with the first portions 22c of the grooves, the

 male connector being rotated relative to its support

(partial commitment of the cards),

- Perform a third axial movement corresponding to a complete engagement of the plugs 26h in the holes 18e and the engagement of the first hooking elements 22a in the first portions 22c,

[0063] and perform a relative rotation to engage the first elements

 hooking 22a in the second portions 22d of the grooves,

 corresponding to a lock.

Such locking can of course be completed by an end-of-travel clipping of the first latching elements 22a in a particular form, the notch kind of the second portion 22d of the grooves and / or by a snap of the ball 33 in the cavity 32.

Thus is proposed an electrical connector for a particularly simple and easy assembly of any electrical device intended to be permanently installed on a wall bracket. The operations to be performed by the end user are very simple. Thanks to the use of a bayonet hook, no tools are necessary. In addition, the security at the electrical connection is improved. The replacement of lamps is very easy and does not cause any damage to the wall that supports the device. The interchangeability provided can allow the assembly of a fan in summer that is replaced by a lamp or that is simply removed, when it becomes unnecessary.

It is obvious that the present description is not limited to the examples explicitly described, but also includes other embodiments and / or implementation. Thus, a technical characteristic described can be replaced respectively by an equivalent technical characteristic, without departing from the scope of the present invention.

Claims

claims An electrical appliance wall connector comprising:  a first piece (10) to be fixed permanently in a wall wall provided for this purpose, said first piece (10) comprising:  a cylindrical housing (14) defining a drum of internal diameter D, a first part (18) of an electric contactor intended to be connected to a source of electricity, and  a first element (22a) of a bayonet coupling member located on the housing shaft,  a second piece (12), to be secured to and connected to an electrical apparatus, comprising  a circular portion (24) of outside diameter d, with d <D,  a second part (26) of an electric contactor, rotatably mounted on said second part (12), and having a first end (26a) adapted to cooperate with the first part (18) of the contactor located on the first part ( 10) and a second end (26b) intended to be integral with an electrical apparatus, and  a second element (22b) of a bayonet hooking member arranged to cooperate with said first element of the first part, said first (18) and second (26) parts of the electric contactor, on the one hand, and said first (22a) and second (22b) elements of the latching member, on the other hand, are arranged in such a way that the first and second parts of the electrical contactor assemble during the assembly of the first and second elements of the fastening member. Connector according to claim 1, characterized in that the second element (22b) of the hooking member comprises at least one groove formed on the outer face of the circular portion (24), the first element of the body of fastening comprising at least one protruding lug, located on the inner face of the cylindrical housing, the groove comprising a first portion (22c) located perpendicular to the plane defined by the second piece (12) and a second portion (22d), extending the first, oriented parallel to said plane, said groove being dimensioned to allow the engagement of said lug. Connector according to claim 1 or 2, characterized in that the second portion (26) of the contactor comprises, on its outer periphery, an edge (26i) formed longitudinally in the axis of the contactor, said edge being intended to cooperate with a groove (18f) that includes the first portion (18) of the switch, to guide the movement of the two parts of the switch when inserting the plugs in the holes. An electrical appliance wall connector comprising:  a first piece (10) to be fixed permanently in a wall wall provided for this purpose, said first piece (10) comprising:  - a housing (14) cylindrical defining a shaft of internal diameter D, - a first portion (18) of an electric contactor having holes (18e),  a first element (22a) of a bayonet coupling member located on the housing shaft,  a second piece (12), comprising:  a circular portion (24) of outside diameter d, with d <D,  a second part (26) of an electric contactor, rotatably mounted on said second part (12), and having a first end (26a) comprising plugs (26h) adapted to cooperate with the first part (18) of the contactor located on the first piece (10) and a second end (26b) intended to be integral with an electrical apparatus, and a second element (22b) of a bayonet hooking member arranged to cooperate with said first element of the first part, said first (18) and second (26) parts on the one hand, and said first (22a) and second (22b) elements on the other hand, being arranged in such a way that the first (18) and second (26) parts of the electrical contactor assemble during assembly of the first (22a) and second (22b) elements of the fastening organ, characterized in that the second element (22b) of the fastening member comprises at least one groove formed on the outer face of the circular portion (24), the first element of the fastening member comprising at least one lug projecting, located on the inner face of the cylindrical housing, the groove comprising a first portion (22c) located perpendicular to the plane defined by the second piece (12) and a second portion (22d), extending the first, oriented parallel to said plane, said groove being dimensioned so as to allow engagement of said lug, the second portion (26) comprising on its outer periphery, an edge (26i), arranged longitudinally, in the axis of the contactor, said edge being intended to cooperate with a groove (18f) that includes the first portion (18) of the switch, to guide the movement of the two parts (18,26) during the insertion of the plugs (26h) in the holes (18e). Connector according to any one of claims 1 to 4, characterized in that the first part (18) of the contactor does not protrude from the housing (14) cylindrical. Connector according to claim 2 or 4, characterized in that the length of the first portion (22c) is at least equal to the depression necessary to allow electrical contact of the two parts of the connector. Connector according to any one of the preceding claims, characterized in that the angular position of the second part (26) of the connector with reference to the second part (12) is indexed. Connector according to any one of the preceding claims, characterized in that the first part (18) is the female part of the contactor and in that the second part (26) of the contactor is the male part of the contactor. Connector according to any one of claims 1 to 8, characterized in that the contactor is a four-pin contactor (26h). 10. Connector according to any one of the preceding claims, characterized in that the second portion (26) of the contactor comprises an annular groove cooperating with the edge of an opening (28b) that comprises the second piece (26), allowing a better engagement and better rotation of the first portion in said opening. 1 1. Ensemble comprising  a first piece (10) of a wall connector for an electrical appliance, for being fixed permanently in a wall wall provided for this purpose, said first piece (10) comprising:  a cylindrical housing defining a drum of internal diameter D,  a first part (18) of an electric contactor intended to be connected to a source of electricity, and  a first element (22a) of a bayonet coupling member located on the housing shaft,  a cover (31) intended to mask said housing, comprising:  a circular portion (24) of outside diameter d, with d <D, and  - A second element (22b) of a bayonet hooking member arranged to cooperate with said first element of the first piece. 12. A wall connector mounting kit, comprising a first piece (10) to be fixed permanently in or on a wall wall provided for this purpose, said first piece (10) having a housing (14) cylindrical defining a barrel having an inner diameter D, a first portion (18) of an electric contactor having holes (18e), a first member (22a) of a bayonet catching member on the housing shaft and means for securing attaching said first piece (10) to or in the wall. 13. A mounting kit for connecting an electrical appliance to a wall connector, comprising a second piece (12) for connection to an electrical appliance, said second piece (12) a circular portion (24) of diameter outside d, with d <D, a second portion (26) of an electric contactor, rotatably mounted on said second piece (12), and having a first end (26a) having pins (26h) adapted to cooperate with the first portion (18) of the contactor located on the first piece (10) and a second end (26b) intended to be secured to an electrical apparatus and a second element (22b) of a bayonet hooking member arranged to cooperate with a first element (22a) of a first wall piece (10) having a cylindrical housing (14) defining a drum of internal diameter D. 14. Mounting kit according to claim 13, further comprising an electrical apparatus, possibly already integral and connected to said second piece (12).