WO2023099540A1

WO2023099540A1 - System for opening a door configured to open to the left or to the right, outwardly and inwardly

Info

Publication number: WO2023099540A1
Application number: PCT/EP2022/083803
Authority: WO
Inventors: Xavier Dinelli; Philippe Planard
Original assignee: Itac Opening
Priority date: 2021-11-30
Filing date: 2022-11-30
Publication date: 2023-06-08
Also published as: FR3129681A1

Abstract

The present invention relates to a system for opening a door configured to open to the left or to the right, outwardly and inwardly, said system consisting of a frame surrounding a leaf (1), characterised in that: a. said leaf (1) has: a. at each corner, a collateral corner mechanism (100, 200, 300, 400) that moves a vertically retractable pivot (110, 210, 310, 410) able to engage in a complementary bearing provided on said frame, b. to the left and to the right, at least one means (160, 260, 360, 460) for interacting with the frame that controls the locking of the corresponding pivot (110, 210, 310, 410) in the retracted position when it is not positioned facing a complementary surface provided on said frame, b. said leaf (1) additionally comprising a means for coordinating the movements of two mechanisms (100, 200) forming a corner and/or two mechanisms (300, 400) which are transversely opposed, c. said leaf (1) comprising an actuating mechanism that coordinatedly controls the retraction of the pivot (110, 210, 310, 410) of each of the two collateral corner mechanisms (100, 200, 300, 400).

Description

OPENING SYSTEM FOR A DOOR CONFIGURED TO OPEN LEFT OR RIGHT, OUTWARDS AND INWARDS

Field of invention

The present invention relates to a leaf, in particular a door, which opens on one or the other of the two opposite edges, and in one direction or the other (by pushing or pulling).

The possibility of opening a leaf, for example a door, on the right and on the left also offers a high degree of flexibility, allowing correct operation in all circumstances. The opening inwards or outwards also allows a great diversity of operation, and in certain uses to guarantee safety.

State of the art

Patent FR782696 describes a door opening on two sides, for coolers in particular. It is guided on both sides by a hinge, which for the opening of the door on one side is erased on the other side. For this, the door has a handle on the right and a handle on the left, the two handles being coupled. This patent provides that the door can only be opened up to a determined angle, a stop bolt limiting the opening. It does not allow the door to open in both directions.

Also known is patent US2650388 which also relates to a door having upper and lower hinge pins on each side thereof and a handle for selectively releasing the pins on one side of such a door. Vertically sliding pins are mounted in the upper and lower ends of said door adjacent each corner thereof. These bushings are fixed to the frame and adapted to align vertically with the pins when the door is in the closed state. Means operable by the handle allow the pins adjacent to one side of the door to be selectively retracted into said door, the remaining pins can be used as hinges.

Disadvantages of the prior art

The solutions of the prior art allow the opening of the door only in one direction (pulled or pushed) and not to combine the possibility of pivoting on the hinge on one side or the other, both in traction and in thrust. They do not allow doors to swing in both directions, from both sides.

Solution provided by the invention

The object of the present invention is to remedy these drawbacks. The invention relates, in its most general sense, to a door opening system having the technical characteristics set out in claim 1.

l’ouvrant présente à chaque angle un mécanisme d’angle comprenant un mécanisme assurant le déplacement :
1. d’un pivot rétractable verticalement, apte à s’engager dans un palier complémentaire prévu sur ledit dormant. Des ressorts repoussent ces articulations pivotantes escamotables vers l’extérieur.
2. d’une roulette commandant le verrouillage en position rétractée du pivot correspondant lorsqu’elle n’est pas en contact avec une surface d’appui complémentaire prévue sur ledit dormant
ledit ouvrant comportant en outre une tige de liaison transversale reliant deux mécanismes d’angle et/ou opposés transversalement, pour coordonner les mouvements desdits mécanismes et/ou opposés latéralement
ledit ouvrant comportant de chaque côté un mécanisme d’actionnement relié par deux tringles aux mécanismes d’angle collatéraux ledit mécanisme d’actionnement commandant le déplacement desdites tringles dans des directions opposées, pour commander de manière coordonnée l’escamotage du pivot de chacun des deux mécanismes d’angle collatéraux.

The opening system that is the subject of the invention is advantageously configured to open to the left or to the right, outwards and inwards, consisting of a frame framing an opening and has in particular the following characteristics:

the opening has at each corner a corner mechanism comprising a mechanism ensuring the displacement:
1. a vertically retractable pivot, able to engage in an additional bearing provided on said fixed frame. Springs push these retractable swivel joints outwards.
2. a wheel controlling the locking in the retracted position of the corresponding pivot when it is not in contact with a complementary support surface provided on said fixed frame
said sash further comprising a transverse connecting rod connecting two corner and/or transversely opposed mechanisms, to coordinate the movements of said laterally opposed and/or opposed mechanisms
said sash comprising on each side an actuating mechanism connected by two rods to the collateral corner mechanisms, said actuating mechanism controlling the movement of said rods in opposite directions, to control the retraction of the pivot of each of the two in a coordinated manner collateral corner mechanisms.

According to variant embodiments:

- Said rollers are horizontally laterally movable and in that said complementary support surfaces are provided on the side edges of said fixed frame.

- said rollers are vertically movable and in that said complementary support surfaces are provided on the transverse edges of said fixed frame.

- said opening is extended on each lateral side by a longitudinal section able to engage in a complementary rib provided on the lateral edge of said fixed frame.

- said profile is supported by a profile, advantageously in "H", and in that an elastically deformable tube is engaged in said profile.

- said profile the retractable pivoting joint comprises an axis extending the slider, on which is mounted a conical body, said conical body coming to engage with a complementary female cone provided on the fixed frame, to facilitate recentering of the opening in the sleeper.

– the system comprises an electric actuator controlling said actuation mechanism as well as a battery integrated in the opening.

– the system includes electrical contacts provided on the upper and/or lower edge of the frame and the sash

- Said retractable pivoting joints form electrical contacts cooperating with complementary electrical contacts provided on the frame.

Detailed description of a non-limiting example of embodiment

The present invention will be described in more detail with reference to non-limiting examples of embodiments specifying the aforementioned advantages and considerations. A more specific description of the invention briefly described above, illustrated by the accompanying drawings where:

there shows a front view of a door according to the invention,

there shows a perspective view of the lower right corner mechanism according to the invention,

there shows a detail view of the pivot according to the invention,

there shows a perspective view of the actuation mechanism according to the invention,

there shows a perspective view of the joint between the frame and the opening of a door according to the invention in the almost closed position,

there shows a perspective view of the joint between the frame and the opening of a door according to the invention in the ajar position.

General principle

There shows a partial sectional view of an embodiment of the invention, for a door opening both to the right and to the left, and by pushing or pulling. The mechanisms illustrated are at an enlarged scale compared to the size of a normal door.

The opening is in a known manner constituted by a panel of wood, metal or any other usual material for a door, or by a frame of wood, metal or similar material, optionally filled with an insulating or fireproofing material, the frame being covered, on both sides, by a decorative panel of wood, metal or similar material. In general, the fixed frame can be constituted by a standard fixed frame.

The invention provides that the sash has at each corner a corner mechanism (100, 200, 300, 400) ensuring the movement of a vertically retractable pivot (110, 210, 310, 410), capable of engaging in an additional bearing provided on said fixed frame. When the two pivots on the same side, for example the collateral pivots (110 and 310), or (210 and 410) are erect, the sash can pivot around the axis defined by the two collateral pivots. A mechanism ensures that the two other opposite collateral pivots are then held in a retracted position where they are no longer in contact with the frame.

This retracted position is locked by mechanical, magnetic, or electromechanical means of interaction with the frame, controlling the locking in the retracted position of the pair of corresponding pivots (110, 210; 310, 410) when it is not positioned opposite a complementary surface provided on said fixed frame. The means of interaction described below is of the mechanical type, formed for example of rollers or rollers coming into contact with the side where the lower and upper crosspieces of the frame. It can also be constituted by magnets or even an electrical contactor, or even a pneumatic system.

The sash (1) further comprises a means for coordinating the movements of two transversely opposed angle mechanisms (100, 200) and/or (300, 400), as well as an actuating mechanism controlling in a coordinated manner the retraction of the pivot (110, 210, 310, 410) of each of the two collateral angle mechanisms (100, 200, 300, 400).

Particular embodiment

Quatre mécanismes d’angle (100, 200, 300, 400)
Deux mécanismes d’actionnement (500, 600), qui sont équipés d’une poignée de porte par l’intermédiaire d’un axe de section carré par exemple comme il est d’usage dans le domaine de la quincaillerie domestique.

The opening (1) is equipped with the mechanisms that are the subject of the invention, to allow it dual mobility (opening to the right or to the left, by pulling or pushing), namely:

Four corner mechanisms (100, 200, 300, 400)
Two actuating mechanisms (500, 600), which are equipped with a door handle via a square section axis for example as is customary in the field of household hardware.

These mechanisms are in the form of blocks comprising a plate on which the various mechanical components are mounted and forming a cassette which can be embedded in the thickness of the opening (1), as is known to do for locks with larder of the prior art.

Du côté gauche, le mécanisme d’actionnement (500) est accouplé au mécanisme d’angle (100) supérieur gauche par une tringle (551) et accouplé au mécanisme d’angle (300) inférieur gauche par une tringle (552)
Du côté droit, le mécanisme d’actionnement (600) est accouplé au mécanisme d’angle (200) supérieur droit par une tringle (651) et accouplé au mécanisme d’angle (400) inférieur droit par une tringle (652)
Au moins deux mécanismes opposés (100, 300) et/ou (200, 400) sont accouplés par une tringle (150).

Some of the mechanisms are coupled by coupling rods:

On the left side, the actuating mechanism (500) is coupled to the upper left corner mechanism (100) by a rod (551) and coupled to the lower left corner mechanism (300) by a rod (552)
On the right side, the actuating mechanism (600) is coupled to the upper right corner mechanism (200) by a rod (651) and coupled to the lower right corner mechanism (400) by a rod (652)
At least two opposed mechanisms (100, 300) and/or (200, 400) are coupled by a rod (150).

By convention, in this patent, "collateral" will designate mechanisms or technical means which are located on the same side of the opening, for example those which are located on the left side, or those located on the right side; "opposing" will designate mechanisms or technical means which are positioned symmetrically with respect to the longitudinal axis of symmetry, for example the upper left (100) and right (200) mechanisms, or the left (300) and right (400) lower.

Articulation of the sash relative to the fixed frame

Each of the angle mechanisms (100, 200, 300, 400) controls the movement of a vertical pivot (110, 210, 310, 410).

Each vertical pivot (110, 210, 310, 410) is movable between a deployed rest position, and a retracted position controlled by an action on the collateral actuation mechanism transmitted to the two collateral angle mechanisms.

The rest position, deployed, is ensured by a spring pushing the pivot (110, 210, 310, 410) outwards or any other known means for exerting a force at rest, which can be periodically compensated by an antagonistic mechanical action .

In the deployed position, the pivot (110, 210, 310, 410) protrudes from the edge of the sash (1) and comes, when the sash is closed (coplanar with the frame), to engage in an additional bearing provided on the frame, to form a pivot axis of the opening (1).

In the retracted position, the pivot (110, 210, 310, 410) is retracted inside the cassette of the mechanism (100, 200, 300, 400) and disappears from the opening to no longer exceed the edge of the opening (1). The sash is therefore free on the side where the two collateral pivots are in the retracted position.

When the four retractable pivot joints (110, 210, 310, 410) are erect, the sash is locked relative to the frame, the two parts of the door being immobilized at the four corners.

When two collateral pivots (110, 310); or (210, 410) are retracted, the sash can pivot relative to the collateral pivots on the opposite side.

When the four retractable pivoting joints (110, 210, 310, 410) are retracted (a situation which should not occur after installation due to the transmission rod (150) which coordinates the two opposing mechanisms (110, 210), the sash is free in relation to the frame and can be removed or positioned in the frame of the frame.

This situation is of interest for the assembly or disassembly of the sash (1), and can occur when the transmission rod (150) connecting the opposite corner mechanisms (100, 200) is uncoupled.

Locking pivots in retracted position

To prevent the retractable pivot joints (110, 210, 310, 410) from returning to the rest position, once the sash (1) is open on one side, the corner mechanisms (100, 200, 300 , 400) comprise a retractable roller feeler (160, 260, 360, 460). The rollers (160, 260, 360, 460) are retractable either horizontally or vertically. In the example described, they are horizontally movable and are pushed back by a complementary surface of the edge of the door frame, when the opening is closed. This additional surface is arranged transversely on the jamb or the threshold of the door to allow the engagement of the rollers both in the pulled direction and in the pushed direction of the door, and those both by an opening on the right and an opening to the left.

A spring or an equivalent means exerts on the roller feeler an effect tending to bring out the roller (160, 260, 360, 460) with respect to the edge of the frame. As soon as the sash opens, the rollers (160, 260, 360, 460) are released from bearing against the edge of the frame and erect relative to the edge of the sash (1). When the sash comes back into contact with the frame, the complementary surface of the edge of the frame pushes the roller (160, 260, 360, 460) into the retracted position.

Each angle mechanism (100, 200, 300, 400) incorporates a mechanism transmitting the movement of the roller (160, 260, 360, 460) to a locking means blocking the pivot (110, 210, 310, 410) in position retracted, thus preventing, as long as the leaf has not returned to the closed position, the return to the rest position where it protrudes from the horizontal edge of the leaf.

Door opening control

The opening has on each side a control mechanism (500, 600) allowing the door to be opened on the desired side. This mechanism (500, 600) is actuated by a door handle via a square axis, of the usual type, engaged in a part having a complementary square hole (501, 601).

Other variants can be envisaged, for example an electromechanical control with a mechatronic actuator controlled by an electric signal, by an electric or electro-optical or tactile contactor or even by a radio frequency control. The control can also be grouped together in the center of the sash, with a mechanism for returning and transmitting actions intermittently to the four corner mechanisms (100, 200, 300, 400).

In the case of an electrically controlled opening, it is possible to provide an electric battery in the opening to avoid a connection by wire to an electrical source. It is also possible to provide rubbing contacts on the upper or lower edge of the sash that come into contact, when the sash is closed, with additional contacts provided on the frame. These contacts can be connected to a fixed electrical source. This solution makes it possible to ensure the recharging of a battery housed in the opening each time the door is closed, and thus guarantee a practically unlimited lifespan of the system.

An alternative consists in ensuring electrical contact via the joints, using metal pivots (110, 310; 210, 410) and the complementary metal parts of the opening to ensure the electrical connection. For example, upper pivots correspond to one pole, and lower pivots correspond to the other pole. Thus, whatever side is engaged, the electrical connection will be ensured.

The handle can also be replaced by a bar that can be pushed or pulled. The action exerted on one of the actuating mechanisms (500, 600) controls the retraction of the collateral pivots, which releases the opening (1) on this side. The antagonist coupling rod (151) of the opposing mechanisms (100, 200) prevents the simultaneous actuation of the left actuation mechanism (500) and of the right actuation mechanism (600), unless this rod (151) is disengaged, for example for fitting or removing the sash. In the case of an electrical control, this function can be exercised by a logic circuit.

duty cycle

Initially, the door is closed, i.e. the opening (1) is coplanar with the median plane of symmetry of the frame. The four retractable pivoting joints (110, 210, 310, 410) are then pushed outwards by their corresponding springs, and their distal ends are engaged in the corresponding fixed bearing, integral with the frame (or the floor). The sash is thus immobilized and locked.

When acting on the left actuating mechanism (500), using a handle or via an electromagnetic actuator, this mechanism (500) causes the retraction of the retractable pivoting joints (110, 310 ) collaterals by a transformation of the movement transmitted by the rods (551, 552) to the collateral corner mechanisms (100, 300). The retractable pivot joints (110, 310) are then disengaged from the left side bearings.

The rod (150) transmits the movement to the opposite upper right mechanism (200), which blocks the movement of the opposite pivot (210), and, through the rods (651, 652), prevents the actuation of the mechanisms (200 , 600, 400) on the right side. The straight pivots (210, 410) thus remain engaged in the corresponding bearings, and the sash can therefore pivot around a straight axis passing through these retractable pivoting joints (210, 410).

You can then either push or pull the sash on the left side to make it pivot relative to the axis defined by the right pivots (210, 410) still engaged in their bearing. When the sash is ajar enough for its edge to be offset from the edge of the frame, the left rollers (160, 360) are pushed outwards by their compressed spring in the closed position, and this movement causes the passage of 'a locking mechanism of the collateral pivots (110, 310) in the retracted position, even if the left handle is released. The sash can thus be kept open for the necessary time without risk of untimely erection of the collateral pivots (110, 310).

When the sash is brought back to the closed position, the left rollers (160, 360) will come into contact with the complementary surface provided on the frame, which will push them inwards, thus releasing the mechanism for locking the collateral pivots (110, 310) which can return to the rest position, where they engage in the corresponding bearings and again ensure the locking of the leaf (1).

The door thus returns to its initial position and a new opening cycle, to the right or to the left, can be engaged.

Detailed description of corner mechanisms

Figures 2 to 5 show perspective views, partially cut away, of the upper left (100), upper right (200), lower left (300), lower right (400) corner mechanisms respectively.

The mechanical elements are described by way of example only and do not limit the scope of the invention. The mechanisms described aim to produce non-linear movements, through the use of rods and cams to adjust the movements of the pivots and coupling rods in order to limit the situations in which they are in an unstable position.

Detailed operation of a mechanism

The description will begin in a situation where the door is closed. When the handle (600) is actuated on the right side, the rod (652) is caused to move upwards, having a shoulder (4001) extending perpendicularly with respect to the rod (652). This shoulder is engaged under a pair of rollers (4002, 4003) provided at the end of an elbow lever (4004) hinged around a pivot (4005). The opposite end of this bell crank (4004) is articulated with respect to a connecting rod (4007) via an axis (4006).

This connecting rod (4007) is pivotally mounted with respect to an axis (4008) at the opposite end of the connecting rod (4007). This axis (4008) drives in translation a slider (4009) on which is fixed the lower right retractable pivoting joint.

A tension spring is hooked between a pin (4011) fixed to the middle of the connecting rod (4007), and a pin (4012) secured to the housing.

Once the lower right retractable pivot joint (410) is retracted (as well as the upper one), the sash can be pivoted in one direction or the other by pushing or pulling on the right side, in the example described. When the edge of the sash comes out of the frame, the roller (460) is released and pushed outwards by the effect of an actuation mechanism.

This actuation mechanism includes a support (4014) supporting the roller (460). The support (4014) pivots around vertical axes not visible on the . This support (4014) is coupled via a bearing pad (4015) rolling against the rear vertical surface of the support (4014), having two rounded teeth (4015, 4016). The transverse movement of the roller (460) controls the tilting of a catch (4017) causing the locking or unlocking of the movement of the slider (4009).

This catch (4017) is subjected to the action of a return spring, pushing the roller (4022) of the catch (4017) towards the slider (4009).

A connection system with the opposite mechanism (300) prevents the simultaneous unlocking of both sides of the leaf and constrains the two mechanisms (300, 400) in reversed modes via a rod (355) of a plate (4018). The movement of this plate (4018) is controlled by a tilting lever (4019) articulated around an axis (4021), its end being linked to a cam (4020) integral with the slider (4009). When the cam (4020) descends, it drives the plate (4018) to the left via the lever (4019).

When closing the door, the roller (460) is pushed inwards when the edge of the opening approaches the amount of the frame. This movement inversely causes the release of the translation of the slider (4009) in erection, which then blocks the tilting of the door when it is engaged in the complementary part of the frame.

Detailed view of a retractable swivel joint

There shows a detail view of the retractable swivel joint (410). It comprises an axis (4031) extending the slider (4009), on which is mounted a conical body (4032). This conical body engages with an additional female cone provided on the fixed frame, to facilitate recentering of the sash in the fixed frame.

Detailed description of the actuation mechanisms

There shows a perspective view, partially cut away, of the actuating mechanisms. The action of the handle on the lever (6001) generates the movement of the rods (6002, 6003) which control the movement of the levers (6004) and (6005) which act on the rods (651, 652) via the levers (6004) and (6005) which carry the rollers (6006, 60007) interacting with cages (6008, 6009).

The reverse translation of the rods (651, 652) generates a reverse movement of the mechanism to return to the neutral position.

The action on the button (6010) acting on the lever (6001) prolongs the extension movement of the rods (651, 652) in order to lock the whole system by means of a housing provided at the end plate (4018) – see – connected to the rod (355).

Joint between sash and frame

There shows a partial perspective view of the seal extending the edge of the opening (1). This seal has a rigid profile (720) whose rounded edge has a rounded profile complementary to a vertical groove (3) provided on the edge of the frame (2). This rigid section (720) is hollow and has an opening allowing it to be engaged on a section (700) having an “H” shaped section. The rigid profile (720) is floating relative to the rigid profile (700), an elastically deformable tube (710) being positioned in the hollow space of the profile (720). When the sash (1) is in the closed position, the rounded edge of the rigid section (720) is pushed back by the elastically deformable tube (710) into the groove (3) of the fixed frame (2).

When the door is opened, the rigid profile (720) comes into abutment against the edge of the groove (3) of the frame (2), which causes it to tilt as shown in relative to the flange of the section (700) and the deformation of the tube (710). This tilting allows the removal of the rigid profile (720) and the opening of the door, before the rigid profile (720) resumes its rest position, symmetrical, by the action of the elastically deformable tube (710).

Claims

– System for opening a door configured to open to the left or to the right, outwards and inwards consisting of a frame framing an opening (1) characterized in that:

said opening (1) has:

at each corner a collateral corner mechanism (100, 300; 200, 400) ensuring the movement of a vertically retractable pivot (110, 310; 210, 410), able to engage in a complementary bearing provided on said frame ,

on the left and on the right at least one means of interaction with the frame controlling the locking in the retracted position of the corresponding pivot (110, 310; 210, 410) when it is not positioned opposite a complementary surface provided on said dormant

said opening (1) further comprising means for coordinating the movements of two corner mechanisms (100, 200) and/or (300, 400) opposed transversely,

said opening (1) comprising an actuating mechanism controlling the retraction of the pivot (110, 310; 210, 410) of each of the two collateral corner mechanisms (100, 300; 200, 400) in a coordinated manner.
– Opening system according to claim 1 characterized in that said interaction means consist of rollers (160, 360; 260, 460) controlling the locking in the retracted position of the corresponding pivot (110, 310; 210, 410) when it is not in contact with a complementary bearing surface provided on said fixed frame.
– Opening system according to claim 1 characterized in that said means of interaction consist of magnetic means.
– Opening system according to claim 1 characterized in that:

said opening (1) has at each corner a corner mechanism (100, 300; 200, 400) comprising a mechanism ensuring the displacement:

a vertically retractable pivot (110, 310; 210, 410), capable of engaging in a complementary bearing provided on said frame, springs pushing said retractable pivoting joints (110, 310; 210, 410) outwards

a roller (160, 360; 260, 460) controlling the locking in the retracted position of the corresponding pivot (110, 310; 210, 410) when it is not in contact with a complementary support surface provided on said sleeping

said opening (1) further comprising a transverse connecting rod (150) connecting two corner mechanisms (100, 200) and/or (300, 400) opposed transversely, to coordinate the movements of said mechanisms (100, 200) and /or (300, 400) laterally opposite

said opening (1) comprising on each side an actuation mechanism (500, 600) connected by two rods (551, 552; 651, 652) to the collateral corner mechanisms (100, 200, 300, 400) said mechanism actuation controlling the movement of said rods (551, 552; 651, 652) in opposite directions, to control in a coordinated manner the retraction of the pivot (110, 210, 310, 410) of each of the two collateral corner mechanisms ( 100, 200, 300, 400).
– Opening system according to claim 4 characterized in that said rollers are movable laterally or horizontally and in that said complementary support surfaces are provided on the side edges of said frame.
– Opening system according to claim 4 characterized in that said rollers are vertically movable and in that said complementary bearing surfaces are provided on the transverse edges of said frame.
– Opening system according to any one of claims 1 to 4 characterized in that said opening (1) is extended on each lateral side by a longitudinal section (720) adapted to engage in a complementary rib (3) provided on the side edge of said frame (2).
– Opening system according to the preceding claim characterized in that said profile (720) is supported by a profile (700) and in that an elastically deformable tube (710) is engaged in said profile (720).
– Opening system according to any one of claims 1 to 4 characterized in that it comprises a profile the retractable pivoting joint (410) having an axis (4031) extending a slider (4009), on which is mounted a conical body (4032), said conical body engaging a complementary female cone provided on the fixed frame, to facilitate recentering of the sash in the fixed frame.
– Opening system according to any one of claims 1 to 4 characterized in that it comprises an electric actuator controlling said actuating mechanism and a battery integrated in the opening (1).
– Opening system according to the preceding claim characterized in that it comprises electrical contacts provided on the upper and / or lower edge of the frame (2) and the opening (1)
– Opening system according to claim 10 characterized in that said retractable pivoting joints (410) form electrical contacts cooperating with complementary electrical contacts provided on the frame (2).