CN114830476B

CN114830476B - Sealed cable input ferrule, electrical housing including such a cable input ferrule, and electrical apparatus including an electrical mechanism attached to such an electrical housing

Info

Publication number: CN114830476B
Application number: CN202080087100.6A
Authority: CN
Inventors: F·马利舍夫斯基; E·杜马斯; A·鲍杜; L·雅尼科
Original assignee: Legrand SNC; Legrand France SA
Current assignee: Legrand SNC; Legrand France SA
Priority date: 2019-12-20
Filing date: 2020-12-04
Publication date: 2024-05-07
Anticipated expiration: 2040-12-04
Also published as: WO2021122050A1; CN114830476A; EP4078746A1; FR3105623B1; FR3105623A1

Abstract

The invention relates to a cable entry ferrule (300) for an electrical housing, comprising: -a support sheet (310) made of a rigid material, having a substantially planar surface (311) and comprising at least one cable passage opening (315); -a sealing joint (320) made of flexible material and extending around said opening for ensuring tightness between the support sheet and the rest of the electrical housing (10). According to the invention, the sealing joint comprises a main portion with a closed contour, which extends entirely over said substantially planar surface.

Description

Sealed cable input ferrule, electrical housing including such a cable input ferrule, and electrical apparatus including an electrical mechanism attached to such an electrical housing

Technical Field

The present invention relates generally to the field of electrical devices (typically socket mechanisms or electrical switching mechanisms).

More particularly, the present invention relates to a sealed electrical housing (box, case) attached protruding from a wall and an electrical apparatus equipped with such an electrical housing.

More specifically, the present invention relates to a cable entry ferrule for an electrical housing comprising:

-a support sheet (support plate) made of a rigid material, having a substantially planar surface and comprising at least one opening for passing the cable;

a sealing joint made of flexible material and extending around said opening for ensuring tightness between the support sheet and the rest of the electrical housing.

Background

The electrical housing generally includes a rear housing and a front frame that snaps to the rear housing. These housings are thus designed to receive mechanisms such as socket mechanisms, circuit breaker mechanisms, or even detection mechanisms.

In order to route wires for these mechanisms, it is necessary to provide a cable entry ferrule to allow the cable to enter the electrical housing and to protect the tightness of the electrical housing, whether when the cable is inserted into the ferrule or when the cable is in an unused state.

The rear housing thus has a recessed recess in its front edge arranged to receive a cable entry ferrule having a pierceable cap for the passage of a cable.

If the tightness between the rear housing and the front frame is normally achieved by a first joint extending at the joint of these two elements, then as regards tightness around the cable entry ferrule, it is achieved by two other joints, namely:

-a second rectilinear joint extending entirely laterally of the collar for achieving tightness between the collar and the front frame;

A third joint, which extends on the surface of the ferrule in a different plane than the second joint, and can protect the tightness between the ferrule and the rear housing.

These second and third joints are made in different planes on the collar, which are expensive to manufacture and ensure the required level of tightness only if the two parts of the housing are firmly fixed together in compression with each other by means of a threaded screw or a quarter turn screw.

Disclosure of Invention

The object of the present invention is therefore to propose a new cable entry ferrule (ferrule for a drop cable) having and having only a single joint, capable of ensuring good tightness between the different constituent parts of the housing.

More specifically, according to the invention, a cable entry ferrule as described in the technical field section is proposed, wherein the sealing joint comprises a main portion with a closed contour, which extends entirely over said substantially planar surface of the support foil.

Thus, the joint is not provided on the peripheral edge (that is, the side) of the support sheet of the cable entry ferrule, but is provided on one of the surfaces of the ferrule.

It is therefore designed to operate not under high-strength compression but under limited compression when assembling the two parts of the front and rear parts of the housing, the tightness being ensured by the continuity of the joint.

Indeed, preferably, the support sheet is arranged for attachment by sliding movement in grooves concavely provided in the front and rear portions of the electrical housing, the sealing joint being arranged for engagement to one of the edges of each groove by compression between the support sheet and these grooves.

Therefore, in order to ensure the required sealing property, it is no longer necessary to fix by strongly compressing the two portions of the housing against each other. The compression of the sealing joint is effectively independent of the way in which the mechanical locking function between the two parts of the housing is achieved. Thus, a simple snap-fit arrangement between the two parts of the housing is sufficient to ensure the required level of tightness (here a level corresponding to the IP55 standard).

Finally, with the present invention, the cable entry ferrule is easily removable from the electrical housing, thereby facilitating the securing of the rear portion of the housing to its support, and also facilitating the insertion of the electrical conductor through the ferrule.

Other non-limiting and advantageous features of the cable entry ferrule according to the present invention are as follows:

-the sealing joint has a constant (uniform) cross section along the entire closure profile;

-the support sheet has a peripheral edge and the main portion of the sealing joint extends at a distance from said peripheral edge;

-said sealing joint comprises two raised portions remote from each other and each extending at least partially on said substantially planar surface between the main portion and the peripheral edge of the support sheet;

-the two raised portions extend over at least part of the thickness of the support sheet from the main portion to the peripheral edge of the support sheet;

-the main part forms a snap ring or a lip;

-the closed profile is quasi-circular;

the opening is at least partially closed by a cap made of the same material as the sealing joint.

The invention also relates to an electrical housing comprising:

-at least one cable entry ferrule as described above;

-a rear portion comprising a bottom wall with fixing means for fixing to a receiving support and a side wall forming a boundary of said bottom wall;

-a front portion comprising a side wall attached to the rear portion such that the side wall of the front portion extends in an extension of the side wall of the rear portion and defines with the side wall of the rear portion a cavity adapted to receive an electrical equipment mechanism.

In the electrical housing, these side walls comprise opposing notches in their edges in a concave manner, which notches receive the cable input ferrule as described above.

Preferably:

-each side wall comprises a wall element and a flange along the recess, the wall elements and flanges together defining a receiving recess for receiving a cable input ferrule;

-on one of the side walls, the wall element and the flange extending outside the recess for together defining an engagement groove engaging an edge of the other side wall;

-providing a further sealing joint which is located in the joint groove when the front and rear parts are assembled;

The front and rear parts are fixed together by means of a snap-fit.

Thus, the oppositely disposed recesses in the front and rear portions of the housing for receiving the cable input ferrules each define a receiving recess for receiving a side of the cable input ferrule. The continuity between the two receiving grooves thus facilitates the connection between the different parts of the sealed housing.

The invention also relates to an electrical device comprising an electrical housing as described above, an electrical device mechanism received by a cavity defined by a side wall of the electrical housing, and a decorative panel closing the electrical housing at the front.

Drawings

The following description is given as a non-limiting example and with reference to the accompanying drawings, from which it will be clear what the invention consists of, and how it can be implemented.

In the drawings:

fig. 1 is an exploded perspective schematic view of an electrical apparatus comprising an electrical housing according to the invention;

FIG. 2 is an assembled perspective schematic view of the electrical housing of FIG. 1;

FIG. 3 is a schematic diagram of a front perspective view of a rear portion of the electrical housing of FIG. 1;

Fig. 4 is a schematic rear perspective view of a front portion of the electrical housing of fig. 1;

Fig. 5 is a perspective schematic view of a sealed cable input ferrule of the electrical housing of fig. 1;

Fig. 6 is a schematic perspective view of the electrical housing of fig. 1 in section along plane P1 of fig. 2;

Fig. 7 is a schematic front perspective view of the sealed cable input ferrule of fig. 5 joined to a rear portion of the electrical housing of fig. 3.

Detailed Description

In the description below, the terms "front" and "rear" are used with respect to the direction of the line of sight of a person looking at the illustrated element. The front of an element refers to the side facing the person looking at it and the rear of an element refers to the side of the element facing the support to which it is attached.

The terms "outer" or "inner" and "outer" or "inner" are used with reference to the electrical housing itself, referring to the side of the element facing the centre of the electrical housing and the side of the element facing the outside of the electrical housing, respectively.

In fig. 1 is shown an electrical device 1 comprising an electrical housing 10 according to the invention, an electrical device mechanism 20 received by a cavity defined by the electrical housing 10, and a decorative plate 30 closing a front opening of the electrical housing 10, through which the interior of the cavity is accessible, which imparts its function to the electrical device 1.

The electrical housing 10 shown in the drawings is a unit-type sealed electrical housing attached protruding from a wall, which is arranged to internally receive an electrical equipment mechanism 20.

The electrical housing 10 is referred to as unitary in that it is configured to receive a single electrical equipment mechanism 20 of the type shown. In a variant, it may be a multi-position housing adapted to house a plurality of electrical equipment mechanisms, in which case it has a more elongated shape.

The electrical device means 20 is here a socket means, but it may also be an electrical switching means or even a (smoke, light) detection means.

The decorative panel 30 includes a frame 31, a receiving port (wellhead) 32 that closes the frame 31 and is used for an electrical plug, and a folding cover 33 (see fig. 1) for protecting the receiving port 32.

As shown in fig. 1 and 2, the electrical housing 10 here has a substantially parallelepiped shape. It may take different shapes, for example cylindrical.

As shown in fig. 2, the electrical housing 10 forms a body generally comprising a side wall closed at the rear by a bottom wall to define a receiving cavity adapted to receive the electrical equipment mechanism 20. The receiving cavity is open at the front to allow access to the electrical equipment mechanism 20 attached in the cavity.

As shown in fig. 1, 3 and 4, in practice, the electrical housing 10 is made of two distinct parts: the rear portion 100, hereinafter referred to as the "plate support", and the front portion 200, hereinafter referred to as the "frame". The panel support is provided for fixing to a partition or wall and for supporting the electrical equipment mechanism 20. The frame has a function of protecting the electrical equipment mechanism 20, and a function of supporting the decorative panel 30 (it should be noted that it allows a user to interact with the electrical equipment mechanism 20).

The panel support is formed here as a single part from a moulded plastics material, and the frame is formed from two parts by means of an engagement, in order to simplify the process of forming the frame by the moulding process.

As shown in fig. 3, the panel support comprises a bottom wall 120, a side wall 110 rising from the bottom wall 120 and substantially perpendicular to the bottom wall 120 forming a boundary of the bottom wall. The side walls 110 of the panel support have a generally rectangular-particularly square-profile with flat panels 115A, 115B connected by beveled portions forming truncated corners.

As shown in fig. 3, the bottom wall 120 of the panel support has fixing means for fixing to a receiving support, here a partition or wall (not shown). The bottom wall 120 of the plate support therefore has a circular opening 127, which is closed here by a pierceable sealing cap. These circular apertures 127 may be penetrated by screws (not shown) to secure the panel support to the partition or wall.

The bottom wall 120 of the plate support also has oblong apertures 128 which can also be penetrated by screws. The two apertures 128 extend in length along mutually perpendicular axes. The oblong shape of these apertures 128 allows adjustment of the mounting direction of the panel support on the partition or wall prior to securing the panel support to the partition or wall.

The bottom wall 120 of the panel support further comprises a central opening 123, closed here by a tearable sealing cap, for the passage of, for example, a cable (U1000 RO2V type or HO7RNF type), an ICTA type wire sheath or an IRL type tube.

As shown in fig. 3, the side wall 110 of the panel support has a defined and constant maximum height H1 on two opposing flat panels 115A.

On the other two opposite flat panels 115B of the side wall 110 of the plate support, the height of the side wall 110 decreases locally from a maximum height H1 to a minimum height H1. The minimum height H1 is for example less than or equal to 10% of the maximum total height H3 of the side walls of the electrical housing.

The local reduction of the height from the maximum height H1 to the minimum height H1 forms a recess in the side wall 110 of the panel support, which recess defines a first inlet opening portion 111 for accessing the interior of the electrical housing 10. Here, two first inlet opening portions 111 are formed on respective opposite flat panels 115B of the side wall 110 of the panel support.

Likewise, as shown in fig. 3, the side wall 110 of the panel support has a particular shape with a wall element 116 extending in the extension of the rest of the side wall 110 and parallel flanges 117, said flanges 117 being shaped such that they delimit, together with the wall element 116, an engagement groove 118 open towards the front. The engagement groove 118 extends along the front edge of the side wall 110 and opens into the receiving groove 114 at a first inlet opening portion 111 formed in an opposite flat panel 115B of the side wall 110 of the panel support. In fact, the side wall 110 of the plate support also has, at each first inlet opening portion 111, a wall element 112 extending in an extension of the remaining portion of the side wall 110 and parallel flanges 113, said flanges 113 being shaped such that they delimit, together with the wall element 112, a receiving recess 114 (see also fig. 7).

Thus, the engagement groove 118 has two opposing portions, the ends of which open into the receiving groove 114.

In the engagement groove 118 (but not in the receiving groove 114) there is provided a sealing engagement 130 (see fig. 3 and 7).

The sealing joint 130 has two portions that extend along the two portions of the joint groove 118, respectively. Which is arranged for deformation during engagement of the frame to the panel support. It thus ensures a sealed assembly between the panel support and the frame.

As shown in fig. 1, 3 and 7, the receiving grooves 114 extending along each of the first inlet opening portions 111 are intended to slidingly receive the cable input ferrule 300.

Here, according to the embodiment of the electrical housing 10 shown, two cable input ferrules 300 are mounted to the panel support and in two first inlet opening portions 111 formed on respective opposite flat panels 115B of the side walls 110 of the panel support.

More specifically, the present invention relates to these cable input ferrules 300.

As shown in fig. 5, each cable entry ferrule 300 includes a support sheet 310 defined between an inner peripheral edge 313 and an outer peripheral edge 312.

Here, the support sheet 310 has a flat shape, substantially square, with two adjacent rounded corners at the rear. In a variant, the support sheet may have any suitable shape, in particular rectangular or circular.

It includes a generally planar outer surface 319 and an inner surface 311.

The inner peripheral edge 313 defines an opening 315 internally for the passage of a cable, an ICTA-type wire sheath or an IRL-type tube guiding such a cable.

Here, the opening 315 has a generally circular profile and has a straight portion located between two rounded corners of the support sheet.

Thus, the inner peripheral edge 313 of the support sheet 310 has a rounded shape with straight portions and the outer peripheral edge 312 has a square shape with two adjacent rounded corners.

As shown in fig. 5, the inner surface 311 of the support sheet 310 is entirely planar.

As shown in fig. 6, the outer surface 319 of the support sheet 310 has three concentric planar portions, namely a central portion 319A, a central portion 319B, and an outer peripheral portion 319C, the central portion 319B being slightly higher toward the outside than the central portion to form a first offset, the outer peripheral portion 319C being lowermost to form a second offset with the central portion 319B.

The first offset defines an outer region of the support sheet 310 that is covered by caps 330 (see fig. 5), 340 (see fig. 6).

The second offset defines an outer region of the support tab 310 that is joined to the panel support or frame.

As shown in fig. 7, the rear portion of the support tab 310 of each cable input ferrule 300 is arranged for sliding into the receiving recess 114 of said first inlet opening portion 111 formed in the corresponding flat panel 115B of the side wall 110 of the panel support.

The rear part of the support foil 310 has for this purpose a shape complementary to the shape of the receiving recess 114, so that it can be snapped into the receiving recess 114.

As will be described later, the front portion of the support sheet 310 is provided for sliding into a groove 214 (see fig. 4) similar to the second inlet opening portion 211 formed in the side wall 210 of the frame.

It has for this purpose a shape complementary to the shape of the recess 214, so that it can engage in the recess 214.

The caps 330, 340 provided on each cable entry ferrule 300 are flexible and can be pierced. It is overmolded onto the outer area of the support sheet 310 defined by the first misalignment to close said opening 315 and is adapted to be penetrated by a cable, an ICTA-type wire sheath or an IRL-type tube.

It is for example a membrane made of an elastic material. The caps 330, 340 are adapted to deform, stretch and tear under the influence of a cable, wire sheath or tube placed thereon, thereby allowing the cable, tube or wire sheath to pass therethrough.

In fig. 6 it can be seen that the collar may have circular concentric ribs on the inside to facilitate its cutting, allowing the passage of a single cable, tube or wire sheath and ensuring a better sealing around the collar. In a variant, as shown in fig. 5, the ribs may be distributed around two different centers so that they are cut into two areas, ensuring the passage of two wire jackets, tubes or cables.

It should be noted that each cap 330, 340 may include one or more rigid elements to facilitate cutting thereof.

In order to make it possible to mount the electrical equipment mechanism 20 to the electrical housing 10, the bottom wall 120 of the panel support carries a column 121 (see fig. 3). These columns 121 extend from the bottom wall 120 toward the front. They extend perpendicular to the bottom wall 120.

The uprights 121 and the panel support are formed from a single piece of moulded plastics material.

Here, four columns 121 are provided, which are arranged in pairs in a symmetrical manner with respect to the center of the bottom wall 120 of the panel support.

Thus, the center is the center of symmetry for locating the column 121. In the positioning of the uprights 121 of the panel support, this central symmetry can allow the electrical equipment mechanism 20 to be mounted to the electrical housing 10 in different positions offset by 90 degrees from each other by rotation about an axis orthogonal to the bottom wall 120 of the panel support and through said center.

Here, each column 121 has a front portion 121A and a rear portion 121B.

The thickness of the front portion 121A is smaller than that of the rear portion 121B, thus forming a dislocation. The offset portion may form a stop that may position the base of the electrical device mechanism 20 in the electrical housing 10a determined distance from the bottom wall 120 of the panel support to leave free space for easy placement of electrical connection lines when the electrical device mechanism 20 is mounted to the electrical housing 10.

The shape of the front portion 121A of the upright 121 allows the base of the electrical equipment mechanism 20 to be mounted by snap-fitting.

More specifically, as shown in fig. 1, the base of the electrical equipment mechanism 20 comprises four identical snap means 21 at its four corners, which are adapted to cooperate with the uprights 121. Each snap means 21 essentially comprises a portion sliding on the upright 121 and a tooth hooking into a window formed in the front portion 121A of each upright 121.

In addition, as shown in fig. 4, the frame includes a sidewall 210 in the form of a sleeve. The side wall 210 is provided for attachment to the side wall 110 of the panel support so as to extend in an extension of the side wall 110. Thus, the side walls 210 have a generally rectangular-and in particular square-profile with flat panels 215A, 215B connected by beveled portions forming truncated corners corresponding to the profile of the side walls 110 of the panel support.

The reinforcement portion 220 in the form of a frame having a lower height is attached to the front edge of the frame by means of an scarf joint. Thus, the frame is made up of a sleeve formed by the side walls 210 and the reinforcing portion 220 in combination by clamping. For this, the reinforcement part 220 includes four clips disposed at four corners thereof, which are received in receiving cavities provided at four corners of the frame, the receiving cavities having shapes corresponding to the clips.

The use of two sub-parts for the frame simplifies the design by moulding. The reinforcing portion 220 has an aesthetic effect and has a protective effect. In practice, it is intended to internally receive the trim panel 30. In a variant, the frame may be formed from a single piece of molded plastic material.

To secure the trim panel 30, as shown in fig. 2, the frame includes a securing aperture 221 for the trim panel 30 on an inner surface of the sidewall 210 thereof. These apertures 221 are adapted to receive elements that may mount the trim panel 30 to the frame. These mounting elements (not shown) are, for example, quarter turn elements and may be operated from the front surface of the trim panel 30.

Similar to the side wall 110 of the panel support, as shown in fig. 4, the side wall 210 of the frame has a determined and constant maximum height H2 on two opposite flat panels 215A, the two opposite flat panels 215A extending in extension of the opposite flat panels 115A of the side wall 110 of the panel support.

Two other opposing flat panels 215B extend in the extension of the opposing flat panels 115B of the side wall 110 of the panel support, in which two opposing flat panels 215B the height of the side wall 210 decreases locally from a maximum height H2 to a minimum height H2. The minimum height H2 is, for example, less than or equal to 20% of the maximum total height H3 (see fig. 2) of the electrical housing 10.

The local reduction in height forms a recess in the side wall 210, which recess defines the second inlet opening portion 211.

Here, two recesses, i.e. two second inlet opening portions 211, are formed in opposite flat panels 215B of the side wall 210 of the frame.

In addition, the recess arranged in the free edge of the frame is located opposite the corresponding recess arranged in the panel support. Each of the second inlet opening portions 211 is intended to correspond to one of the first inlet opening portions 111 formed on one of the flat panels 115B of the side walls 110 of the panel support opposite each other.

Thus, when the panel support and the frame are assembled as described below, the combination of the first inlet opening portion 111 of the side wall 110 of the panel support and the second inlet opening portion 211 of the side wall 210 of the frame forms a complete inlet opening. Here, two complete inlet openings are formed on two opposite panels of the electrical housing. In a variant, the inlet opening may be formed on two adjacent panels of the side wall of the body. Still in a variant, more inlet openings may be provided.

As mentioned above, along each second inlet opening portion 211, the rear edge of the side wall 210 of the frame has wall elements 212 extending in an extension of the rest of the side wall 210 of the frame and parallel flanges 213, which flanges 213 together with the wall elements 212 delimit receiving grooves 214 opening towards the rear, similar to the side wall 110 of the panel support. The receiving recess 214 is also intended to slidingly receive the cable input ferrule 300.

In addition to the portions along each second inlet opening portion 211, the rear edge of the side wall 210 of the frame has ribs 216 adapted to be inserted or engaged into engagement grooves 118 formed along the front edge of the side wall 110 of the panel support when the panel support and the frame are assembled.

In a variant, it is clear that the groove may be provided at the rear edge of the front portion of the electrical housing and the rib may be provided at the front edge of the rear portion of the electrical housing.

Thus, the above-mentioned circumferential engagement 130, which may establish a sealing engagement between the front edge of the side wall 110 of the panel support and the rear edge of the side wall 210 of the frame, is positioned between the surface of the engagement groove 118 and the rib 216.

In addition, to ensure the tightness of the electrical housing 10, a sealing joint 320 is also interposed between the support tab 310 of each cable input ferrule 300 and the side walls 110, 210 of the panel support and frame.

As shown in fig. 5, according to a particularly advantageous feature of the invention, such a sealing joint 320, which is more flexible than the support foil 310, comprises a main portion 321, which main portion 321 extends completely over the inner surface 311 of the support foil 310 along a closed contour around the opening 315, in order to ensure tightness around the opening 315.

The sealing joint 320 further comprises two raised portions 322, which raised portions 322 extend from a main portion 321 having a closed contour towards the outside, ensuring tightness between the support sheet 310 and the rest of the electrical housing 10.

Thus, by virtue of the shape of the seal joint 320, the cable input ferrule 300 is independent of the housing to ensure tightness of its engagement with the rest of the electrical housing 10.

While the sealing interface 320 is here provided to extend over the inner surface 311 of the support sheet 310, in a variant it may be provided to extend over a planar portion of the outer surface of the support sheet 310.

In any event, the sealing interface 320 is configured to be compressed between the support tab 310 and one of the edges defining the receiving recess 114, 214 provided in the side walls 110, 210 of the panel support and frame.

Thus, when the cable entry ferrule 300 is in place in these receiving grooves 114, 214, compression of the sealing interface 320 is achieved. Thus, its compression is independent of the forces to which the plate support and the frame are subjected in contact with each other.

The main portion 321 of the sealing joint 320 has a constant cross section along the entire closure profile of the joint. Here, it forms a quasi-circular collar, the cross section of which is semicircular. In a variant, it may form a lip.

The closure profile of the sealing joint 320 is defined herein as "quasi-circular", so that in this case it may have a straight portion in order to follow the shape of the inner peripheral edge 313 of the support foil 310.

The main portion 321 of the sealing joint 320 extends at a distance from the inner peripheral edge 313 and the outer peripheral edge 312 of the support sheet 310.

It can ensure good sealing around the opening 315 of the support sheet 310. However, it does not ensure that the joint between the support sheet and the frame at the entrance opening provided in the housing for receiving the cable input ferrule 300 has equally good tightness.

In fact, the other sealing joint 130 located in the joint recess 118 of the side wall 110 of the panel support is not provided for contacting the main portion 321 of the sealing joint 320 of the cable input ferrule 300.

The two raised portions 322 are thus provided for ensuring engagement between the other sealing joint 130 and the main portion 321 of the sealing joint 320.

The two raised portions 322 are at a distance from each other, more specifically here the two raised portions 322 are distanced from each other in a diametrically opposite manner with respect to the main portion 321 of the sealing joint 320. That is, they extend in length in a corresponding plane to the plane of engagement of the panel support and the frame.

Each of the raised portions has a first portion 322A that extends radially from the main portion 321 to the peripheral edge 312 of the support sheet 310 and a second portion 332B that extends over the peripheral edge 312 of the support sheet 310, that is, over a portion of the thickness of the side portion of the support sheet 310.

Thus, as best shown in fig. 7, each raised portion 322 is designed for placement at the interface between the panel support and the frame. As can be seen in the figures, the portion 322B of each raised portion 322 beyond the lateral boundary of the support foil 310 makes it possible to make a good engagement between the main portion 321 of the sealing engagement 320 and the further sealing engagement 130 provided in the engagement recess 118 of the side wall 110 of the panel support.

As shown in fig. 6, the seal joint 320 is molded into a correspondingly concavely disposed groove in the inner surface 311 of the support sheet 310, thus ensuring better locking of the seal joint 320 to the support sheet 310. The groove has a rectangular cross section and is open toward the interior. Which extends under the entire sealing joint 320.

The sealing joint 320 is formed here from a single component made of one and only one material (e.g. an SEBS type elastomer).

The sealing interface 320 is made of the same material as the caps 330, 340 and is formed simultaneously with the caps 330, 340 by over-molding on the support sheet 310.

The cable entry collar 300 is provided for being held between the frame and the panel support by a simple scarf joint when the two elements are secured together.

The engagement of the ribs 216 of the frame in the grooves of the panel support ensures a relative locking of the frame relative to the panel support in a plane parallel to the plane of the partition or wall. In contrast, such an engagement cannot seal off the frame relative to the panel support along an axis orthogonal to the plane.

To ensure such a blockage, the panel support and the frame comprise complementary locking means, which are intended to lock the assembly of the frame on the panel support. These complementary locking devices are here releasable locking devices.

Here, four sets of complementary locking devices are provided, one at each of the four corners of the electrical housing 10. This ensures that the frame is firmly fixed to the panel support and at the same time frees up space inside the electrical housing 10, so that the arrangement of the cables can be optimized.

As shown in fig. 3, each catch means provided on the panel support is in the form of a bayonet 150 which together with the panel support is formed from a single piece, where the single piece is made of molded plastic material.

Each bayonet 150 extends beyond the inner surface of each beveled portion of the side wall 110 of the plate support and has a contour that is pointed toward the inside.

As shown in fig. 4, each locker provided on the frame and intended to cooperate with each bayonet 150 of the panel support is carried by a lever 250. Each lever 250 forms a single piece with the side wall 210 of the frame and extends beyond the inner surface of each ramp portion of the side wall 210.

Each lever 250 is in the form of a rectangular sheet, the two reinforcing sides forming the boundary thereof.

Each lever 250 is connected to the side wall 210 of the frame only by its front end. It is elastically deformable at the junction with the side wall 210 of the frame, thereby forming a hinge structure.

Each lever 250 has an opening 251 adapted to engage a corresponding bayonet 150 of the plate support. The opening 251 has, in particular, a front edge adapted to hook onto the rear surface of the bayonet 150 to lock the frame to the panel support.

The rear end of each lever 250 is bent toward the inside of the frame, thereby forming a flange (burring) 252. The flange 252 includes a slot 253 into which an end of a tool such as a screwdriver may be inserted to, for example, disengage the lever 250 from the bayonet 150, thereby releasing the lever 250 (and thus removing the frame latch from the latch of the panel support).

When the electrical apparatus 1 is installed protruding from the partition wall, first, an installer fixes the panel support to the partition wall by inserting screws into the oblong holes 128 (see fig. 2, 4 and 5) and simultaneously adjusts the direction thereof. The installer may also insert screws into the circular apertures 127 to enhance fixation.

Then, the installer inserts the cable, the wire jacket or the tube through the sealing films 330, 340 of the cable input ferrule 300 and inserts the support tab 310 of the cable input ferrule 300 along the first inlet opening portion 111 into the groove 114 formed in the side wall 110 of the panel support.

As such, the rear portion of the sealing interface 320 of the cable entry ferrule 300 abuts the wall member 112 of the panel support.

The installer then routes the electrical equipment mechanism 20 and positions it on the uprights of the panel support.

Once the electrical equipment mechanism 20 is installed and electrically connected, the installer assembles the frame equipped with the reinforcing portion 220 to the panel support by means of the complementary installation means by means of scarf joints and by means of the complementary locking means by means of snap-in.

As such, the front portion of the sealing interface 320 of the cable entry ferrule 300 abuts the flange 213 of the side wall 210 of the frame.

Finally, the installer installs the decorative panel 30 into the aperture 221 of the side wall 210 of the frame to hermetically close the front opening of the electrical housing 10 and impart its function to the electrical apparatus 1.

The invention is not limited to the embodiments described and shown, but a person skilled in the art will understand how to make any variants.

Thus, in the different figures, the electrical housing has a square section and defines a single station that can house one or two electrical equipment mechanisms, which we will refer to as a unitary housing.

In a variant, it may be a multi-position housing, having a rectangular cross section, and defining two or three positions. In this variant, the electrical housing preferably comprises a frame defining a plurality of openings, each intended to receive one of the bits.

Claims

1. A cable entry ferrule (300) for an electrical housing (10), comprising:

-a support sheet (310) made of a rigid material, having a substantially planar surface (311) and a peripheral edge (312), and comprising at least one opening (315) through which the electrical cable passes;

A sealing joint (320) made of flexible material extending around said opening (315) for ensuring tightness between the support sheet (310) and the rest of the electrical housing (10),

Wherein the sealing joint (320) comprises a main portion (321) with a closed contour, which extends entirely over the substantially planar surface (311), and two raised portions (322) at a distance from each other, each raised portion extending at least partially over the substantially planar surface (311) between the peripheral edge (312) of the support sheet (310) and the main portion (321).

2. The cable input ferrule (300) of claim 1, wherein the main portion (321) has a constant cross-section along the entire closed profile.

3. The cable input ferrule (300) according to claim 1, wherein the support sheet (310) has a peripheral edge (312), the main portion (321) extending at a distance from the peripheral edge (312).

4. The cable input ferrule (300) according to claim 1, wherein the two raised portions (322) extend from the main portion (321) to a peripheral edge (312) of the support sheet (310) over at least part of the thickness of the support sheet (310).

5. The cable input ferrule (300) of claim 1, wherein the main portion (321) forms a snap ring or lip.

6. The cable input ferrule (300) of claim 1, wherein the closed profile is quasi-circular.

7. The cable input ferrule (300) of claim 1, wherein the opening (315) is at least partially closed by a cap (330, 340) made of the same material as the sealing joint (320).

8. An electrical housing (10), comprising:

-a rear portion (100) comprising a bottom wall (120) provided with fixing means (127, 128) for fixing to a receiving support, and a side wall (110) forming a boundary of said bottom wall (120);

A front portion (200) comprising a side wall (210) attached to said rear portion (100) such that the side wall (210) of the front portion (200) extends in an extension of the side wall (110) of the rear portion (100) and the side wall of the front portion and the side wall of the rear portion together define a cavity adapted to receive an electrical equipment mechanism (20),

Characterized in that the electrical housing comprises at least one cable entry ferrule (300) according to claim 1, and

The side wall (110) of the rear portion (100) comprises a first recess in its edge in a concave manner and the side wall (210) of the front portion (200) comprises a second recess in its edge in a concave manner, the first and second recesses extending opposite each other and receiving the cable input ferrule (300) according to claim 1.

9. The electrical housing (10) of claim 8, wherein the side wall (110) of the rear portion (100) includes a first wall element (112) and a first flange (113) along the first recess, the side wall (210) of the front portion (200) includes a second wall element (212) and a second flange (213) along the second recess, the first wall element (112) and the first flange (113) together define a first receiving groove (114) for receiving a cable input ferrule (300), the second wall element (212) and the second flange (213) together define a second receiving groove (214) for receiving a cable input ferrule (300).

10. The electrical housing (10) according to claim 9, wherein on one of the side wall of the rear portion (100) and the side wall of the front portion (200), the respective first or second wall element and the first or second flange extend outside the respective first or second recess for together defining an engagement groove (118) for engaging an edge of the other of the side wall of the front portion (200) and the side wall of the rear portion (100).

11. The electrical housing (10) according to claim 10, wherein a further sealing joint (130) is provided, which is located in the joint groove (118) when the front part (200) and the rear part (100) are assembled.

12. The electrical housing (10) of claim 8, wherein the front portion (200) and the rear portion (100) are secured together by snap-fit means.

13. Electrical device (1) comprising an electrical housing (10) according to claim 8, an electrical device mechanism (20) received by a cavity delimited by a side wall (110) of a rear portion (100) and a side wall (210) of a front portion (200) of the electrical housing (10), and a decorative plate (30) closing the electrical housing (10) at the front.