FR3057711A1 - ELECTRICAL SOCKET COMPRISING A MONOBLOCK PART FOR SUPPORTING AND RECEIVING ALVEOLS AND METHOD FOR ASSEMBLING SUCH AN ELECTRICAL SOCKET - Google Patents

Abstract

The invention relates to an electrical socket (1) comprising: • a base (6) provided with an inner housing (24), the inner housing (24) of the base (6) opening on a central opening (26); • a printed circuit (8) arranged within the inner housing (24) of the base (6); At least two cells (10) for receiving an electrical contact pin, each cell (10) having a portion (34) connected to the printed circuit (8), each cell (10) being intended to receive a contact pin electrical connector, and being adapted to grip this pin so as to maintain electrical contact between the pin and the cell. The electrical socket (1) further comprises a one-piece piece (12) for supporting and receiving the cells (10) arranged within the inner housing (24) of the base (6), and means (14) for the removable fixing of the one-piece piece (12) to the base (6), said one-piece piece (12) defining at least two compartments (36) for receiving a cell (10), each cell (10) being fixed within one of said compartments (36).

Description

Holder (s): LEGRAND FRANCE Public limited company, LEGRAND SNC General partnership.

Extension request (s)

Agent (s): NOVAGRAAF TECHNOLOGIES.

ELECTRICAL SOCKET COMPRISING A ONE-PIECE PIECE FOR SUPPORTING AND RECEIVING CELLS AND METHOD FOR ASSEMBLING SUCH AN ELECTRICAL SOCKET.

FR 3,057,711 - A1 t5 / j The invention relates to an electrical outlet (1) comprising:

a base (6) provided with an interior housing (24), the interior housing (24) of the base (6) opening onto a central opening (26);

a printed circuit (8) arranged within the interior housing (24) of the base (6);

at least two cells (10) for receiving an electrical contact pin, each cell (10) having a portion (34) connected to the printed circuit (8), each cell (10) being intended to receive an electrical contact pin of an electrical plug, and being suitable for enclosing this pin so as to maintain an electrical contact between the pin and the cell.

The electrical outlet (1) further comprises a single piece (12) for supporting and receiving the cells (10) arranged within the interior housing (24) of the base (6), and means (14) for removable fixing of the one-piece piece (12) to the base (6), said one-piece piece (12) defining at least two compartments (36) for receiving a cell (10), each cell (10) being fixed within one of said compartments (36).

ELECTRICAL OUTLET COMPRISING A ONE-PIECE PIECE FOR SUPPORTING AND RECEIVING HAVES AND METHOD FOR ASSEMBLING SUCH AN ELECTRICAL OUTLET

TECHNICAL FIELD OF THE INVENTION The present invention relates generally to the field of electrical installations. It relates in particular to an electrical outlet comprising at least two cells for receiving an electrical contact pin, and a printed circuit electrically connected to the cells. The present invention also relates to a method of assembling such an electrical outlet.

Such electrical outlets combine the functionality of a "conventional" electrical outlet, typically a recessed outlet for receiving an electrical plug, with additional functionality related to the printed circuit. These electrical outlets find their application or use in the Internet of Things field, for example, as plugs connected via an Internet-type data communication network.

STATE OF THE PRIOR ART It is known electrical outlets comprising at least two cells for receiving an electrical contact pin, and a printed circuit electrically connected to the cells. An example of this type of electrical outlet is known from document US 7,549,874 B2. The electrical outlet described in this document includes a base, a printed circuit, and several cells for receiving an electrical contact pin. The base is provided with an interior housing opening onto a central opening. The printed circuit is arranged within the interior housing of the base. Each receiving cell is arranged within the interior housing of the base so as to be arranged opposite the central opening, and is fixed in a dedicated compartment arranged within the base. Each cell is soldered at one of its ends to the printed circuit, and is capable of enclosing an electrical contact pin of an electrical plug so as to maintain electrical contact between the pin and the cell.

In a conventional outlet, and a fortiori in such an electrical outlet, it is however essential that the receiving cells are positioned and adjusted with the minimum possible clearance within the dedicated compartments of the base. Indeed, this makes it possible to guarantee correct operation between the cells of the socket and the pins of the plug, in particular in terms of pressure exerted by the cells on the pins, quality of the electrical contact established and limitation of overheating.

However, one of the problems associated with the electrical outlet as described in document US 7,549,874 B2 is that, in order to successfully assemble the outlet, it is necessary to leave sufficient clearance between the cells of reception and their respective compartments in order to allow all positioning dispersions consecutive to the prior welding of the cells on the printed circuit. Therefore, from

0 due to this excessive play between the cells and their respective compartments in the base, the cells cannot be precisely adjusted in their compartments and the performance of the former is degraded, in particular from the point of view of the quality of the contacts between plugs and sockets. In addition, the fixing of the cells in the compartments

5 of the base is made difficult due to the prior welding of the cells on the printed circuit, and the overall size of the resulting assembly, as well as the stress on the welds of the cells.

OBJECTIVE OF THE INVENTION The electrical outlet of the invention aims to remedy all or part of the drawbacks of the state of the art and aims in particular to propose an electrical outlet provided with receiving cells electrically connected to a circuit printed, allowing a simple assembly of the socket while presenting improved performances for the cells.

SUMMARY OF THE INVENTION This objective is achieved by means of an electrical outlet comprising:

• a base fitted with an interior housing, the interior housing of the base opening onto a central opening;

• a printed circuit arranged within the interior housing of the base;

• at least two cells for receiving an electrical contact pin, each cell being arranged within the interior housing of the base so as to be arranged facing the central opening, and having a portion connected to the printed circuit, each cell being intended to receive an electrical contact pin of an electrical plug, and being suitable for enclosing this pin so as to maintain an electrical contact between the pin and the cell;

wherein the electrical outlet further comprises a monobloc piece for supporting and receiving the cells arranged within the interior housing of the base, and means for detachably fixing the monobloc part to the base, said monobloc part defining at least two reception compartments of a cell, each cell being fixed within one of said compartments.

[0008] Thus, this solution achieves the aforementioned objective. In particular, thanks to the combination between a dedicated one-piece piece provided with compartments for receiving the cells and means for removably fixing this piece within the base, the electrical socket according to the invention advantageously makes it possible to be able to arrange and adjust first the cells within the compartments of the one-piece, then connect the cells to the printed circuit and finally fix the assembly within the base. Thus, the cells are easily and precisely adjusted in their respective compartments, with minimal clearance between the cells and the compartments. The performance of the cells is thus significantly improved. In addition, the assembly of the electrical outlet according to the invention is simple, precise and intuitive.

According to a technical characteristic of the invention, the removable fixing means comprise at least one blocking stop on the base, and at least one part on the one-piece part able to cooperate with the blocking stop to allow insertion into firm holding position of the single piece within the base, the base having at least one inner wall, said inner wall having said blocking stop, said part projecting from an outer wall of the piece.

Such a configuration makes it possible to facilitate the fixing of the one-piece part within the interior housing of the base. Furthermore, due to the firm blocking of the one-piece part within the base, the successive mechanical stresses that will cause the installation and

0 the extraction of the electrical plug from the socket is advantageously supported by the base itself, and no longer by the portions of the cells connected to the printed circuit. Thus, the risk of deterioration of these connected portions of the cells, due to these mechanical stresses, is reduced.

5 According to another technical characteristic of the invention, the electrical outlet further comprises means for detachably fixing each cell to its receiving compartment, each cell being detachably fixed within said compartment.

This feature makes it easier to fix each cell within its receiving compartment.

Advantageously, the removable fixing means comprise at least one blocking stop on the compartment, and at least one thinning of material on the cell capable of cooperating with the blocking stop to allow insertion in the firm holding position of said cell within said receiving compartment, each compartment of the one-piece part having at least one inner wall, said inner wall comprising said blocking stop, said thinning of material forming an insertion chamfer.

Such a configuration makes it possible to combine in a single operation the adjustment and fixing of each cell within its receiving compartment. Thus, this adjustment and this fixing are even easier.

According to another technical characteristic of the invention, the electrical outlet further comprises an outlet head arranged on the base and at least partially closing the central opening on which opens the interior housing of the base.

According to yet another technical characteristic of the invention,

0 the plug head is provided on one of its surfaces with at least two through orifices, each orifice opening into the central opening, each cell being arranged within the interior housing of the base so as to be disposed opposite 'one of said orifices.

Advantageously, the printed circuit is arranged between the head of

5 socket and the cells, within the interior housing defined by the base, and the printed circuit comprises at least two holes for the passage of an electrical contact pin, each light being disposed opposite one of the orifices and the corresponding cell, between said orifice and said cell.

Such a configuration improves the compactness of the electrical outlet, and thus reduces its overall size.

According to another technical characteristic of the invention, the one-piece piece is shaped so that the piece is capable of holding in place at least one electronic, mechanical or electromechanical component within the interior housing defined by the base.

Such a conformation of the single piece advantageously makes it possible to reduce the size of the electrical outlet. Such a conformation of the one-piece part is particularly advantageous in the case where the component is a component having relatively large dimensions, such as a relay for example.

According to another technical characteristic of the invention, the one-piece piece is provided with at least one pin for centering and positioning the one-piece piece relative to the printed circuit.

This feature reduces the positioning games of the cells relative to the printed circuit, and therefore relative to the base. This characteristic also makes it easier to install the printed circuit within the interior housing of the base.

According to another technical characteristic of the invention, the taking

0 electric additionally comprises an apparatus support also providing a protective outer cover function.

Another aspect of the invention relates to a method of assembling an electrical outlet, the electrical outlet comprising a base provided with an interior housing, the interior housing of the base

5 leading to a central opening; a printed circuit; at least two cells for receiving an electrical contact pin, each cell having a connection portion, each cell being intended to receive an electrical contact pin of an electrical plug, and being suitable for enclosing this pin so as to maintain an electrical contact between the spindle and the cell; a one-piece piece for supporting and receiving the cells, said one-piece piece defining at least two compartments for receiving a cell; and means for removable attachment of the one-piece part to the base;

the process comprising the following steps:

• the insertion and fixing of each cell in one of the compartments of the single piece;

• the connection to the printed circuit of the connection portion of each cell;

• the arrangement, within the interior housing defined by the base, of the assembly formed of the printed circuit and of the one-piece part equipped with the cells;

• the attachment of the one-piece part within the interior housing defined by the base, so that each receiving cell is arranged facing the central opening.

The method of assembling an electrical outlet according to the invention has the advantage of being simpler and more precise than the methods of assembling electrical outlets of the prior art. The time required to assemble the socket is thus advantageously reduced, while retaining optimal performance for the socket cells.

According to a technical characteristic of the invention, the step of connection to the printed circuit of the connection portion of each cell is carried out by soldering.

BRIEF DESCRIPTION OF THE FIGURES Other innovative characteristics and advantages of the invention will emerge on reading the description below, provided for information and in no way limitative, with reference to the appended drawings, in which:

- Figure 1 illustrates in perspective an example of an electrical outlet according to the invention;

Figure 2 is a sectional view, taken along the plane A-A, of part of the electrical outlet of Figure 1;

Figure 3 is a perspective and exploded view of the electrical outlet of Figure 1, the electrical outlet comprising a printed circuit, two cells for receiving an electrical contact pin and a single piece for supporting and receiving the cells;

Figure 4 is a perspective and exploded view of the printed circuit, the cells and the integral piece for supporting and receiving the cells of Figure 3; and FIG. 5 is a perspective and assembled view of the printed circuit, the cells and the integral piece for supporting and receiving the cells of FIG. 3.

0 For clarity, identical or similar elements are identified by identical reference signs in all of the figures.

DETAILED DESCRIPTION OF AN EMBODIMENT In FIGS. 1 to 3 is shown respectively in perspective, in section and in exploded view an electrical outlet 1 according to an embodiment.

5 realization of the invention. The electrical outlet 1 is intended to receive an electrical plug of electrical equipment, for example so that it is connected to the electrical network. To this end, such an electrical plug comprises means of electrical connections generally consisting of at least one conductive contact pin. The electrical outlet 1 comprises for example an outlet head 2 provided on one of its surfaces 3 with holes 4 for the passage of the conductive pin (s) of the electrical plug. FIG. 2 represents a sectional view of the electrical socket 1 without the socket head 2.

The electrical outlet 1 is for example intended to be embedded in a partition. According to a particular embodiment of the invention, the electrical outlet 1 is further intended to be connected to one or more other electronic equipment (s) via a data communication network of the Internet type. The electrical outlet 1 is for example able to be controlled remotely.

The electrical outlet 1 comprises a base 6, a printed circuit 8 and at least two cells 10 for receiving a contact pin of an electrical plug. Such an electrical plug is not shown in the figures for reasons of clarity. In the particular embodiment of Figures 1 to 5, the electrical outlet 1 comprises two receiving cells 10. The electrical outlet 1 further comprises a single piece 12 for supporting and receiving the cells 10, and means 14 for

0 removable attachment of the single piece 12 to the base 6. Preferably, the electrical outlet 1 further comprises an apparatus support 16, and an electrical contact pin to the ground 18. The contact pin to the ground 18 is intended to protrude from the socket head 2, so that it can be received in a corresponding opening of an electrical plug. Of

5 more preferably, the electrical outlet 1 further comprises at least one pin 19 for centering and positioning the one-piece part 12 relative to the printed circuit 8. In the particular embodiment of FIGS. 1 to 5, the electrical outlet 1 comprises three centering and positioning pins 19.

ίο As shown in Figure 3, the base 6 generally comprises a base 20. Side walls 22 extend from the base 20 in a direction perpendicular to the base 20, thus defining an interior housing 24. The inner housing 24 opens, on the side opposite the base 20, onto a central opening 26.

The plug head 2 is arranged on the base, on the side opposite to the base 20, and closes at least partially the central opening 26. In the particular embodiment of Figures 1 to 5, the plug head 2 closes the central opening 26 in combination with the apparatus support 16.

Each orifice 4 of the plug head 2 opens into the central opening 26.

The printed circuit 8 is arranged within the interior housing 24 of the base 6. Preferably, the printed circuit 8 is arranged between the socket head 2 and the receiving cells 10, within the interior housing 24, as shown in Figure 3. Advantageously, the printed circuit 8 comprises at least two slots 28 for the passage of an electrical contact pin. In the particular embodiment of FIGS. 1 to 5, the printed circuit 8 includes two passage lights 28. Each light 28 is arranged opposite one of the orifices 4 of the socket head 2 of a

0 part and one of the cells 10 on the other hand, between the orifice 4 and the cell 10, as shown in Figures 3, 4 and 5.

Preferably, the printed circuit 8 also includes an orifice 30 for the passage of the contact pin 18, as illustrated in FIGS. 4 and 5.

5 Each receiving cell 10 is arranged within the interior housing 24 of the base 6 so as to be arranged opposite the central opening 26. Advantageously, each cell 10 is arranged within the interior housing 24 so as to be arranged opposite one of the orifices 4 of the plug head 2, as illustrated in FIGS. 2, 3 and 4.

As indicated above, each cell 10 is also advantageously arranged facing a passage light 28 of the printed circuit 8.

Each cell 10 is suitable for enclosing an electrical contact pin 5 of an electrical plug so as to maintain electrical contact between the pin and the cell 10. To do this, each receiving cell is for example formed of a metal piece, preferably made of brass, provided with two parts 32 forming a clamp, as illustrated in the particular embodiment of FIGS. 1 to 5.

Each cell 10 has a portion 34 for connection to the printed circuit 8. The portion 34 of each cell 10 is for example connected to the printed circuit 8 by soldering, as will be described later. In the particular embodiment of Figures 1 to 5, the connection portion 34 of each cell 10 is for example formed of a metal part.

According to this particular embodiment, one of the cells 10 further comprises a terminal 33 for connection to a neutral wire, integrally with the two parts 32 and with the connection part 34, as illustrated in the Figure 4. The electrical outlet 1 further comprises a

0 independent terminal 35 for connection to a phase wire.

The one-piece piece 12 is arranged within the inner housing 24 of the base 6. The one-piece piece 12 defines at least two compartments 36 for receiving a cell 10. In the particular embodiment of Figures 1 to 5, the monobloc piece 12 defines two

5 receiving compartments 36. Each cell 10 is fixed within a compartment 36, as shown in FIG. 4. To do this, the electrical outlet 1 can for example advantageously include means 38 for removable fixing of each cell 10 to its receiving compartment 36, as illustrated in FIGS. 3 and 4.

Preferably, the single piece 12 is shaped so that it is able to hold in place at least one electronic, mechanical or electromechanical component within the interior housing 24 defined by the base 6. Such a component is for example an electromechanical relay.

Advantageously, the means 38 for removably fixing each cell 10 to its receiving compartment 36 comprise at least one blocking stop 40 on the compartment 36, and at least one thinning of material 42 on the cell 10 able to cooperate with the blocking stop 40 to allow insertion into the firm holding position of the cell 10 within the compartment 36. Each blocking stop 40 is arranged on an inner wall of the receiving compartment 36 corresponding to the cell 10. Each locking stop 40 is for example in the form of a rigid stop, capable of holding the cell 10 in the firm holding position within the corresponding compartment 36, when the cell 10 is inserted in the compartment 36. Each stop blocking 40 has for example a chamfered shape to facilitate the engagement of the cell 10 in the corresponding compartment 36. Each thinning of material 42 is arranged on an outer wall of one of the parts 32 of the cell 10. Each thinning of material 42 forms an insertion chamfer allowing local reversible deformation of the cell 10 when it is inserted into the compartment 36, under the action of one of the stops 40. In the particular embodiment of FIGS. 3 and 4, the removable fixing means 38 comprise, for each cell 10, two locking stops 40 and two thinnings of material 42.

Preferably, the means 14 for removably fixing the piece 12 to the base 6 have at least one locking stop 46 on the base 6, and at least one part 48 on the piece 12 adapted to cooperate with the stop blocking 46 to allow insertion in the firm holding position of the piece 12 within the base 6. Each blocking stop 46 is arranged on an inner wall 50 of the base 6. Each blocking stop 46 is for example under the form of a rigid stop, capable of cooperating with an upper part of one of the parts 48, in order to maintain the one-piece part 12 in the firm holding position within the base 6, when the one-piece part 12 is inserted in the base 6 Each blocking stop 46 has for example a chamfered shape in order to facilitate the engagement of the part 12 in the base 6. Each part 48 projects from an outer wall

52 of the monobloc part 12. Each part 48 forms a part capable of deforming in a reversible manner during the insertion of the monobloc part 12 in the base 6, under the action of one of the stops 46, thus allowing the insertion of the single piece 12 in the base 6. In the particular embodiment of FIG. 3, each part 48 is a hollowed out part, thus making it possible to facilitate the reversible deformation of the part 48 during the insertion of the part monobloc 12 in the base 6. In a variant not shown, each part 48 is a solid part made of a material chosen to allow such a reversible deformation. In the particular embodiment of Figure 3, the fixing means

0 removable 14 have two locking stops 46 and two parts 48.

As illustrated in FIG. 4, each centering and positioning pin 19 projects from an upper wall of the single piece 12, and is able to cooperate with a dedicated orifice 54 of the printed circuit 8.

5 The method of assembling the electrical outlet 1 according to the invention will now be described, with reference to Figures 3 to 5.

Initially, the electrical outlet 1 is in the exploded form as shown in FIG. 3.

During a first step illustrated in Figure 4, an operator inserts each cell 10 within one of the receiving compartments 36 of the one-piece part 12. The operator then fixes each cell 10 within the compartment 36 associated with it. To do this, the operator can for example implement the complementary means 38, 40, 42 for removable fixing of the monobloc piece 12 to the base 6. Each compartment 36 of the monoblock piece 12 is produced with a spacing such that it allows an adjustment of the cell 10 within the compartment 36 guaranteeing an optimal performance of the latter.

Thus, the cells 10 are adjusted separately with precision within their respective compartments 36. At the end of this first step, the operator positions the printed circuit 8 on the single piece 12, as illustrated in FIG. 5. To do this, the operator uses the pins 19 and inserts the latter into the orifices 54 of the printed circuit 8, in order to allow centering and positioning of the one-piece part 12 relative to the printed circuit 8.

In a next step illustrated in Figure 5, the operator connects the connection portion 34 of each cell 10 to the printed circuit 8. Preferably, this connection step is performed by

0 solder.

In a next step, the operator agency, within the interior housing 24 defined by the base 6, the assembly formed of the printed circuit 8 and the one-piece 12 equipped with the cells 10.

During a final step, the operator fixes the one-piece part

5 12 within the interior housing 24 defined by the base 6, so that each receiving cell 10 is disposed opposite the central opening 26. To do this, the operator implements the complementary means 14, 46, 48 for detachably fixing the monobloc piece 12 to the base 6. The operator can then, for example, finalize the assembly of the electrical socket 1 by closing the central opening 26 by fixing the socket head 2 and the support 16 on the base 6.

The invention is described in the foregoing by way of example. It is understood that the person skilled in the art is able to carry out different variant embodiments of the invention, for example by combining the different characteristics above taken alone or in combination, without however departing from the scope of the invention .

Claims (11)

1. Electrical outlet (1) comprising: • a base (6) provided with an interior housing (24), the interior housing (24) of the base (6) opening onto a central opening (26); • a printed circuit (8) arranged within the interior housing (24) of the base (6); • at least two cells (10) for receiving an electrical contact pin, each cell (10) being arranged within the interior housing (24) of the base (6) so as to be arranged facing the central opening (26), and having a portion (34) connected to the printed circuit (8), each socket (10) being intended to receive an electrical contact pin of an electrical plug, and being suitable for enclosing this pin so as to maintain an electrical contact between the spindle and the cell; in which the electrical outlet (1) further comprises a single piece (12) for supporting and receiving the cells (10) arranged within the interior housing (24) of the base (6), and fixing means (14) removable from the one-piece piece (12) to the base (6), said one-piece piece (12) defining at least two compartments (36) for receiving a cell (10), each cell (10) being fixed within a said compartments (36). 2. An electrical outlet (1) according to claim 1, in which the removable fixing means (14) comprise at least one blocking stop (46) on the base (6), and at least one part (48) on the part. monobloc (12) able to cooperate with the blocking stop (46) to allow insertion in the firm holding position of the monobloc part (12) within the base (6), the base (6) having at least one interior wall (50), said inner wall (50) comprising said blocking stop (46), said part (48) projecting from an outer wall (52) of the monobloc piece (12). 3. electrical outlet (1) according to claim 1 or 2, wherein the electrical outlet (1) further comprises means (38) for removable attachment of each cell (10) to its receiving compartment (36), each cell (10) being removably attached within said compartment (36). 4. Electrical outlet (1) according to claim 3, wherein the removable fixing means (38) comprise at least one locking stop (40) on the compartment (36), and at least one thinning of material (42) on the cell (10) able to cooperate with the locking stop (40) to allow insertion in the firm holding position of said cell (10) within said receiving compartment (36), each compartment (36) of the part monoblock (12) having at least one interior wall, said interior wall comprising said blocking stop (40), said thinning of material (42) forming an insertion chamfer. 5. Electrical outlet (1) according to any one of the preceding claims, wherein the electrical outlet (1) further comprises an outlet head (2) arranged on the base (6) and closing at least partially the opening central (26) on which opens the interior housing (24) of the base (6). 6. An electrical outlet (1) according to claim 5, in which the outlet head (2) is provided on one of its surfaces (3) with at least two through orifices (4), each orifice (4) opening out. in the central opening (26), each cell (10) being arranged within the interior housing (24) of the base (6) so as to be arranged opposite one of said orifices (4). 7. electrical outlet (1) according to claim 6, in which the printed circuit (8) is arranged between the outlet head (2) and the cells (10), within the interior housing (24) defined by the base ( 6), and in which the printed circuit (8) comprises at least two slots (28) for the passage of an electrical contact pin, each slot (28) being arranged opposite one of the orifices (4) and of the 'corresponding cell (10), between said orifice (4) and said cell (10). 8. Electrical outlet (1) according to any one of the preceding claims, in which the piece (12) is shaped so that the piece (12) is capable of holding in place at least one electronic, mechanical or electromechanical component. within the interior housing (24) defined by the base (6). 9. Electrical outlet (1) according to any one of the preceding claims, in which the monobloc piece (12) is provided with at least one pin (19) for centering and positioning the monobloc piece (12) relative to the printed circuit (8). 10. A method of assembling an electrical outlet (1), the electrical outlet (1) comprising a base (6) provided with an interior housing (24), the interior housing (24) of the base (6) opening onto a central opening (26); a printed circuit (8); at least two cells (10) for receiving an electrical contact pin, each cell (10) having a connection portion (34), each cell (10) being intended to receive an electrical contact pin of an electrical plug , and being able to enclose this pin so as to maintain an electrical contact between the pin and the cell; a one-piece piece (12) for supporting and receiving the cells (10), said one-piece piece (12) defining at least two compartments (36) for receiving a cell (10); and means (38) for detachably fixing the monobloc piece (12) to the base (6); 5 the method comprising the following steps: • insertion and fixing of each cell (10) in one of the compartments (36) of the monobloc piece (12); • the connection to the printed circuit (8) of the connection portion (34) of each cell (10); 10 · the arrangement, within the interior housing (24) defined by the base (6), of the assembly formed of the printed circuit (8) and of the monobloc part (12) equipped with the cells (10); • the fixing of the monobloc piece (12) within the interior housing (24) defined by the base (6), so that each receiving cell 15 (10) is arranged opposite the central opening (26). 11. The method of claim 10, wherein the step of connection to the printed circuit (8) of the connection portion (34) of each cell (10) is performed by soldering. 1/3