WO2017212043A1

WO2017212043A1 - Extending device

Info

Publication number: WO2017212043A1
Application number: PCT/EP2017/064169
Authority: WO
Inventors: David Navarro
Original assignee: Na-Ceo France
Priority date: 2016-06-10
Filing date: 2017-06-09
Publication date: 2017-12-14
Also published as: FR3052347B1; FR3052347A1

Abstract

The invention corresponds to a device (1) comprising at least a first surface (2a) in a first plane and a second surface (2b) in a second plane parallel to the first plane, said device (1) being extendable from a closed position to an open position, the device (1) passing from the closed position to the open position by a first movement in translation oriented upwards and by second and third movements in translation forwards and upwards, respectively, the two surfaces (2a, 2b) being offset from one another when the device (1) is in the open position, characterized in that, when the device (1) is in the closed position, the two surfaces (2a, 2b) are offset and in that a projection of the first surface (2a) on a horizontal plane and a projection of the second surface (2b) on the same horizontal plane are separate from one another.

Description

DEPLOYMENT DEVICE

FIELD OF THE INVENTION

The invention relates to a device for deploying a structure comprising different surfaces.

STATE OF THE ART

In his dwelling, in a business or a business, he is equipped with furniture of great height and width, and having storage spaces of great depth. Storing or accessing objects placed in the rear area of these storage spaces is difficult. This fact is accentuated when these storage units are in the lower part of furniture close to the ground, the user has to kneel to, with his folded arm, access to the rear area of the storage spaces. Access is also difficult when storage spaces are located in the cabinet at a height greater than that of a standing user ... The field of the invention corresponds to the means for facilitating access to the bottom of these storage compartments, by proposing a device for deploying surfaces such as:

> It forms platforms constituting a step to access the high parts of a storage,

it forms a drawer for easy access to the bottom area of this drawer, and

> it forms a platform constituting a shelf for easy access to the rear area of this storage space.

There is known in the prior art a furniture, comprising a base with a drawer, and a folding stool assembly received in the drawer. The entire ladder is configured to pull out of the drawer and rise to a position unfolded to form a stepladder with two steps when the drawer is open. It is known to have a deployment of the stepladder assembly activated by a pressure on a first control member placed at the front of the drawer. It is known that the drawer opens and slides automatically, by means of a translational guiding mechanism, and that a translational movement means exits from the drawer the stepladder assembly; this means is either a spring or a motor. Once the drawer is open, a second control member activates the rotation of a spring or motor which will vertically deploy the ladder.

However, this solution has the disadvantage that the two steps are superimposed when they are stored in the drawer, and that during their deployment, the two steps remain partially superimposed. This has the disadvantage of reducing the usable surface for placing the user 's feet on the surface forming the step because of the interference of the upper step, making it difficult to raise this step ladder, and to limit the number of steps . Indeed, the number of steps depends on the ability to stack it in the drawer, which must go under a piece of furniture. The low storage height under the furniture, commonly less than 10 centimeters or even less than 7 centimeters allows to stack only few steps. This solution is not suitable for the realization of storage spaces such as compartments forming superimposed drawers instead of steps. In fact, the drawers compartments stacked in the stowed position will have a low height because of their stacking, thus limiting their use as a drawer, and does not allow access to the rear of the storage or to make drawer compartments satisfactory. This solution is also not suitable for the realization of storage spaces such as shelves. Indeed, just like the steps, the shelves remain partially superimposed. This has the disadvantage of reducing the useful area for storing objects due to the interference of the upper shelves em pedant on the shelves directly below. The known solutions do not make it possible to respond satisfactorily to these different applications.

It is also known in the prior art a retractable folding stool. having at least one step, which is housed in the closed position either beneath a piece of furniture or in a suitcase. The extraction of under the cabinet is done under the action of gas springs on a structure comprising a first horizontal pantograph. This device also includes spring locks for holding in the closed position; the stool is deployed by a mechanism corresponding to a second vertical pantograph moved by gas springs. This solution has the same disadvantage of having two superposed steps as in the previous prior art, for the production of a stool, or the transposition to the realization of drawers or shelves.

There is therefore a real need for a device to overcome these defects of the prior art, allowing easy access for the user to either steps, drawers compartments or shelves when the device is deployed. , while allowing storage of the satisfactory device in a storage space.

DESCRIPTION OF THE INVENTION

The following invention proposes to solve these problems by proposing a device comprising at least a first surface in a first plane and a second surface in a second plane parallel to the first plane, said device being deployable from a closed position to a open position, the device passing from the closed position to the open position by a first translational movement of an intermediate structure facing forwards in a horizontal main direction and by second and third translation movements respectively forward and upwards, the two surfaces being offset relative to each other when the device is in the open position, characterized in that when the device is in the closed position the two surfaces are offset and parallel to the first and second plane , and in that a projection of the first surface on a horizontal plane and a projection of the second surfac e on the same horizontal plane are distinct. This allows you to store the surfaces side by side and thus use the full depth of the storage space to store the different surfaces. This configuration makes it possible to use drawer surfaces of the height of the storage space by also using the rear area of the storage space making it accessible. By arranging the surfaces in the same orientation as their position of use, their height space is optimized in the stowed position. It also allows for storage of a plurality of shelf or step surfaces depending on the depth of the storage space and not on the height of the storage space. This is particularly advantageous in the case of deep furniture because we can then store a large number of steps or shelves. The present invention also presents the characteristics that will emerge during the following description, which should be considered in isolation or in combination.

Advantageously, the two surfaces are supported by a front structure comprising a lower part and a scissor structure supported by the lower part and having two subassemblies on either side of the surfaces. The scissor structure allows the guiding of the third translational movement of the surfaces while the lower part realizes the second movement.

According to a constructive arrangement, each subassembly comprises a main bar, a first support bar for supporting the first surface and pivotally mounted at the high end of the main bar, a first connecting rod pivotally mounted also at the end. high of the main bar, and a second connecting rod in the alignment of the first rod in the open position and pivotally mounted on the lower part. The main bar forms a triangle with the first and the second link when they are aligned in the open position and with the low structure, whereas when the first and second link are folded back on themselves, the main bar is folded over. along the low structure, horizontally. The surfaces attached to it are then translated vertically.

According to one improvement, the subset includes a second support bar parallel to the first support bar and pivotally mounted on the first connecting rod on the same axis as the second second connecting rod, a third link connecting parallel to the first connecting rod and pivotally connected to the first and second support bars, such that the pivot axes of the first and third connecting links are distributed at the ends of a first parallelogram. This ensures the parallelism between the support bars, and therefore between the surfaces.

According to a constructive arrangement, the subassembly further comprises a fourth connecting link parallel to the second connecting link and pivotally connected to the second support bar and the lower part so that the pivot axes The second and fourth link bars are distributed at the ends of a second parallelogram. This ensures the parallelism of the support bars, and therefore the surfaces, at the bottom.

According to one embodiment, the subassembly further comprises a holding bar pivotally mounted on the second support bar at one end of the holding bar and slidably and pivotally mounted at the second end on the lower part in the direction main horizontal so as to form a locking leg of the second bar in the deployed position being substantially vertical. The holding bar provides a significant stiffening of the scissors structure, by providing a return of the vertical loads related to the weight taken up by the surfaces. The holding bar ensures the deployed position against the forces exerted on the surfaces or the scissor structure.

According to an improvement, the holding bar is struggling between a horizontal position in the closed position and a locking position in the deployed position, the bar passing through a vertical position between the horizontal position and the locking position, the lower part having a retraction mechanism comprising a maneuvering member accessible from the front, and an actuator moved by the operating member to push the holding bar from the lock position beyond the vertical position. By choosing a locking position beyond the vertical position, the unstable equilibrium point of the said vertical position is exceeded and the support bar is braced, thus ensuring that it can not leave this position. by herself. The retraction mechanism then makes it possible to leave this blocking position of the holding bar in order to initiate the storing towards the stowed position.

According to a constructive arrangement, the elements of the scissors structure are arranged in a transverse direction in the following manner, from the outermost to the innermost:

> the main bar;

> the first support bar;

> the third link;

> the first link;

> the second connecting rod, pivotally mounted on the outside of a vertical wing of the lower part;

> the second support bar;

> the fourth link, pivotally mounted inside the vertical wing of the lower part.

This arrangement ensures that the elements of the subassembly can be stored next to each other in the closed position, so as to limit as much as possible the overall height in this position.

According to one embodiment, each subassembly further comprises a control rod pivotally mounted on the main bar in its center, the control rod being pivotally mounted at a front end of the intermediate structure so as to bind the second and the third simultaneous translation movement. The control rod being connected to the intermediate structure, the second movement of the front part relative to the intermediate structure forces the main bar to rotate, further forming a triangle with the control rod. The position of the front structure is thus defined as a function of the third movement.

In this case, the control rod can be placed on the inside of the intermediate structure between the intermediate structure and the main bar.

According to a first variant, the device comprises means for locking the front structure with respect to the intermediate structure during the first translational movement. This means dissociates the first movement and the second movement to prevent the front structure from deploying before it has completely cleared the storage space. This avoids that the device does not hit the upper wall of the storage space and / or gets stuck. Thus, the front structure and the intermediate structure are held motionless relative to each other during the first movement. According to a first exemplary embodiment, the locking means consists of a roller of a rear structure bearing on the main bar of the front structure of the device. This means is intended to block the deployment of the bar relative to the intermediate structure of the device during the first translational movement.

Alternatively, the locking means comprises a pin mounted on the main bar cooperating with a cam groove carried by the intermediate structure, the cam groove having a first portion of horizontal direction to maintain horizontally the main bar during the second movement translation, followed by a second portion releasing the pin, and therefore the main bar, to begin the third translation movement, and a third portion of horizontal direction to allow the sliding of the forward structure further forward. The movement in the first portion allows the structure to be removed as much as possible before starting the deployment, and thus to optimize the occupation of the space in front of the piece of furniture. The deployment phase is essentially focused on the movement of the nipple in the second portion, while the movement of the nipple in the last portion allows to find the full open position.

Advantageously, the intermediate structure of the device is movable in translation relative to a rear structure of the device during the first translational movement. This makes it possible to slide the intermediate structure out of the rear structure, under the action of a motor or an energy storage member such as a spring.

According to a second variant, the device comprises a means of locking the rear structure with the intermediate structure during the second and third simultaneous translational movements. By this means, the rear structure and the intermediate structure are held movable relative to each other during the second and third translational movements.

According to a second exemplary embodiment, the locking means comprises a trigger attached to either the intermediate structure of the device or to the rear structure of the device, and a stud attached to the other of the structures among the intermediate structure of the device and the rear structure of the device. This means is intended to lock the intermediate structure with the rear structure during the second and third sim ultaneous translation movements.

According to a third example, the locking means comprises a rocker pivotally mounted in the middle on the intermediate structure, the rocker having a hook cooperating with a striker of the front structure, and a wheel at the end of the rocker opposite the hook. the locking means further comprising a rolling track for the roller extending horizontally on the rear structure and rising vertically at its front end so that when the roller rolls over the rolling track, the hook is engaged in the striker and when the rocker is released by the vertical lift, the rocker pivots and disengages the hook of the striker to release the front part of the intermediate part. In combination with abutment means on the first movement, the rocker realizes the locking of the intermediate structure once the roller is housed against the ascent. In addition the rocker realizes the locking of the front part with the intermediate part during the first movement.

Advantageously, in the closed position, front and intermediate structures of the device are contained in the space formed by a rear structure of the device. This makes it possible to have a compact device in the closed position.

According to a third variant, the surfaces form drawers. This makes it possible to use this device to make a set of shallow drawers retractable in a housing of a deep furniture.

According to a fourth variant, the surfaces form platforms. This makes it possible to use the device to make a step or set of retractable shelves. The invention also relates to a compartment comprising a device with at least one of the preceding characteristics. This compartment can be mobile.

The invention also relates to a piece of furniture having at least one housing comprising a device with at least one of the preceding characteristics

Advantageously, the piece of furniture comprises at least three means of assembling the device with respect to the piece of furniture. This reduced number of assembly means makes it possible to limit the holes to be made in the cabinet, simplifying assembly. The three assembly means define three points forming a contact plane of the device with the furniture, this avoids a warping of the device during assembly. Thus, one avoids a torsion of the device that can hinder or block the deployment.

BRIEF DESCRIPTION OF THE FIGURES

Other advantages may still be apparent to those skilled in the art on reading the examples below, illustrated by the appended figures, given for illustrative purposes, among which: > Figure 1 shows a perspective view of a deployment device according to the invention in the open position;

FIG. 2 represents the device of FIG. 1 in the open position;

Figure 3 shows a detail view of Figure 2 of a locking means;

FIG. 4 represents a perspective view of the deployment device of FIG. 1 in the closed position;

FIG. 5 represents a view from above of the device of FIG. 4;

FIGS. 6a, 6b, 6c, 6d represent different side views of the deployment steps of the device of FIG. 1 in respectively closed position, during a first translational movement, during the second and third translational movements, and in position deployed;

FIGS. 7a, 7b, 7c, 7d represent different cross-sectional views along a vertical plane passing through an axis XX 'indicated in FIG. 1, of the device of FIG. 1 during the steps of FIGS. 6a, 6b, 6c, 6d respectively. ;

Figure 8 shows a detail view VI I of Figure 6d;

Figure 9 is a detail view IX of Figure 7d;

> Figure 10 shows a perspective view of a variant of the device in the open position;

FIG. 11 is a perspective view of an example of a com compartment carrying a device in the closed position;

Figure 12 is a top view of a subset of a scissors structure in a closed position;

Figure 13 is a side view of a device according to a second embodiment of the invention, in the open position;

Fig. 14 is a view similar to Fig. 13, shown without a portion of the intermediate structure; FIG. 15 is a partial view from above of the lower part of the front structure of FIG. 13;

Figures 16 to 20 are side views of the device of Figure 13 in different intermediate positions during the transition from the closed position to the open position;

Figures 21 and 22 are side views of the device of Figure 13 showing the locking of the front structure relative to the intermediate structure.

DETAILED DESCRIPTION

In the following description, the deployment devices described are intended to be used in a horizontally oriented position as shown in Figs. 6a to 6d. The directions will be indicated with respect to these figures 6a to 6d, where the left of the figures corresponds to the front of the device and the right of the figures corresponds to the rear of the device. The ground is in the present description confuses u with a horizontal plane. The device 1 illustrated in FIGS. 1 to 9 comprises a front portion 3, an intermediate portion 4 and a rear portion 7.

The front portion 3 is movable in translation relative to the intermediate portion 4. The intermediate portion 4 is movable in translation relative to the rear portion 7.

The front portion 3 com bears a lower portion 31, a scissor structure 35, first and second surfaces 2a, 2b cooperating with the scissor structure 35, u third surface 2C supported by the lower portion 31, a support bar 32 The device 1 comprises the first surface 2a disposed in a first plane P, and the second surface 2b disposed in a second plane P 'parallel to the first plane P com me illustrated in Figure 6d. The surfaces 2a, 2b may be steps as illustrated in FIG. 1 in the case of using the device to form a staircase, or drawers 20a, 20b, as shown in FIG. 10. The surfaces can form shelves according to an embodiment not illustrated here, in the case of using the device to form a set of storage units.

In the exemplary embodiment illustrated in FIGS. 1 to 9, the device comprises three surfaces 2a, 2b, 2c. The surfaces 2a, 2b, 2c are here parallel to each other and horizontal. The front structure 3 comprises the surfaces 2a, 2b, 2c, of which at least two 2a, 2b are connected to the scissors structure 35. The surfaces 2a, 2b are offset relative to one another when the device is in open position. According to a first alternative embodiment not illustrated here, the two surfaces 2a, 2b are offset without overlap when the device 1 is in the open position, so that a projected Sa of the first surface 2a on a horizontal plane and a projected Sb of the second surface 2b on the same horizontal plane are distinct.

In the exemplary embodiment illustrated in FIG. 1, a third surface 2c is connected to the lower part 31 of the front structure 3 of the device 1.

The device 1 is deployable from a so-called closed position as illustrated in FIG. 4 to a so-called open position as illustrated in FIG. 1, these two positions corresponding to the stable positions of the device 1. The closed position of the device 1 corresponds to the folded and compact device such that shown in Figure 4.

The scissor structure is formed of two subsets 35a, 35b arranged on either side of the steps 2a, 2b, symmetrical with respect to the middle of the steps. Each subassembly 35a, 35b is now described in the open position, as shown in Figs 1 and 2. The pivot axes are horizontal in a transverse direction and parallel to each other in the following description part. Each subassembly 35a, 35b comprises a main bar 5 pivotally mounted in K on the lower part 31, a control rod 350 pivotally mounted on the main bar 5 in its middle H, a first support bar 355 to support the first surface 2a and pivotally mounted at A at the upper end of the main bar 5, a first linking link 351 also pivoted at A at the upper end of the main bar 5, a second support bar 356 parallel to the first support bar 355 and pivotally mounted at the other end of the first connecting rod 351 on the same B-axis as a second connecting rod 352. The second connecting rod 352 is in alignment with the first connecting rod 351 and is pivotally mounted at C on the lower part 31, at the front. The subassembly 35a, 35b further comprises a third connecting link 353 parallel to the first connecting link 351 and pivotally connected at D and E to the first and second support bars 355, 356. The axes pivoting of the first and third connecting links 351, 353 are distributed at the vertices of a first ABED parallelogram. The subassembly 35a, 35b further comprises a fourth connecting link 354 parallel to the second connecting link 352 and pivotally connected at E to the second support bar 356 and at F at the bottom portion 31. The axes pivoting of the second and fourth connecting links 352, 354 are distributed at the ends of a second parallelogram BCFE. The control rod 350 is pivotally mounted in G at the front end of the intermediate structure 4. The first surface 2a is mounted on the first support bars 355 and the second surface 2b is mounted on the second support bars 356.

The elements of the subset of the scissors structure are arranged in a transverse direction in the following manner, from the outermost to the innermost, as shown in FIG. 12:

> the control rod 350, placed on the inner side of the intermediate structure 4;

> the main bar 5;

the first support bar 355;

the third connecting link 353; t> the first connecting rod 351; > the second connecting link 352, pivotally mounted outside a vertical wing 311 of the lower portion 31;

the second support bar 356;

the fourth connecting link 354 pivotally mounted inside the vertical wing 311 of the lower part 31; and

> the support bar 32.

The vertical wing 311 has a notch 312 for the passage of the pivot 357 connecting the fourth connecting link 354 to the second support bar 356. In the folded position, all the pivot axes of the scissor structure 5 are substantially in the same position. horizontal plane.

A holding means 71 holds the device 1 in the closed position. In the example illustrated in FIGS. 1 to 9, the holding means 71 is a well-known push-release magnetic holding system in the field of furniture. The operation of this well known magnetic holding system of the prior art is as follows: the system exerts a magnetic attraction against a steel part of the device 1, this magnetic attraction prevents the movement of the device 1 forward and therefore its deployment. The push-release magnetic hold system switches from a magnetic attraction state to an inactive state, and vice versa by a back-and-forth movement of the device.

In the example illustrated in FIG. 1, the holding means 71 also comprises an elastic damping means 72 absorbing stresses exerted in the event of excessive support during rearward displacement intended to activate or deactivate the means of 71. In the example illustrated in FIG. 4, a force F1 is applied to the mobile false skirting 41 located on the front structure 3 of the device 1 allowing the movement of the push-release holding means 71 to be moved. The open position of the device 1 corresponds to the deployed device as shown in Figure 1. The transition from the closed position to the open position is effected by a first translation movement Tl oriented forward and by second T2 and third T3 movements of translation respectively forward and upward. The first translation movement Tl slides rails 73 positioned on the rear structure 7 of the device 1 in a groove 42 of the intermediate structure 4 of the device 1. The grooves 42 and the corresponding rails 73 are placed laterally on the intermediate structures 4 and Rear 7 of the device 1 in the example illustrated here. The first translational movement T1 is caused by an elastic means 12 or a motor, or a pneumatic cylinder. In the example illustrated here, the means 12 is a compression spring 120 shown diagrammatically in FIGS. 1, 2, 7b to 7d and 10. The spring 120 is connected to the rear structure 7 and to the intermediate structure 4. In a second alternative embodiment not shown here, a first motor is used as means 12 for performing the first translation movement Tl, controlled by a single means such as an electric button coupled to an electronic card, or a remote control.

The second and third translation movements T2 and T3 are obtained by moving the front structure 3 of the device 1 relative to the intermediate structure 4 of the device 1. The front structure 3 of the device 1 comprises the lower part 31 which is translated by relative to the intermediate structure 4, and the scissor structure 35. The intermediate structure 4 also comprises a horizontal groove 44, opening, in which slides horizontally a pin 51 connected to the main bar 5 of the scissors structure 35. When the device 1 is in the closed position, the pin 51 is located at the rear of the groove 44 and the scissor structure 35 is substantially horizontal, in a folded state. The horizontal translation of the pin 51 from the rear of the groove 44 towards the front of the groove 44 accompanies the vertical translation movement T3 of the scissor structure 35 which rises. This is enabled via the main bar 5 of the scissor structure 35. The main bar 5 forms in the open position a triangle with the lower portion 31 and the first and second connecting links 351, 352 which have their aligned pivot axes. By folding the first and the second connecting rod 351, 352 on themselves, like a toggle joint, the triangle is closed until the main bar 5 is parallel to the lower part 31, horizontally. during these movements, the second support bar 356 is kept parallel to the lower part 31 through the second and the fourth connecting rod 352, 354 with which they form the second parallelogram whose vertices are hinged. Likewise, the first support bar 355 is kept parallel to the second support bar 356, and therefore to the lower part 31, thanks to the first and the third connecting rod 351, 353 with which they form the first parallelogram whose vertices are articulated. In the upward movement T3, the surface 2b is moved rearwardly over the surface 2a, while the surface 2a is moved forward. Their respective projected Sa, Sb are thus reversed between the closed position and the open position. The transition from the open position to the retracted position is effected by a reverse movement.

The second and third translation movements T2 and T3 are caused by at least a second elastic means 13 or a motor, or a pneumatic cylinder. In the example illustrated here, the second means 13 is a torsion spring 131 placed at a pivot point of the scissor structure 35, and connected to the main bar 5 and the control rod 350 so as to exert a constraint torsion on the scissors structure 35 when in the folded position. Thus, the torsion spring 131 tends to close the angle between the bottom of the main bar 5 and the control rod 350. A third alternative embodiment not shown here uses a second motor as the second means 13 to perform the second and third translation movement T2 and T3, controlled by a single means such as an electric button coupled to an electronic card, or a remote control. By using, for example, a displacement sensor, it is possible to configure the first and second motors to act one after the other in order to fully deploy the device according to the first translational movement T1 and then according to the second and third translational movements. T2 and T3, and to configure the first and second engines to act one after the other in order to retract the device 1 according to a fourth and fifth translation movements respectively opposed to the third and second translation movements T3 and T2, then in a sixth translation movement opposite to the first translation movement Tl. When the device 1 is in the closed position, the scissors structure 35 is in a horizontal position in a folded state, the surfaces 2a, 2b connected to the scissors structure 35 are found offset with respect to each other without j uxtaposition so that a projected Sa of the first surface 2a on a horizontal plane and a projected Sb of the second surface 2b on the same horizontal plane are distinct. Thus, this invention allows easy access for the user to the surfaces 2a, 2b when the device 1 is deployed, or in the open position, while ensuring a satisfactory storage of the device 1 in the closed position.

The number of surfaces connected to the scissors structure 35 in the embodiment illustrated here is two, but it is possible to clearly arrange for the skilled person a greater number of surfaces connected to the scissors structure. The third surface 2c connected to the lower part 31 of the front structure 3 of the device 1 does not have the same characteristics as the two other surfaces described. Indeed, this surface 2c is j uxtaposed with respect to one of the surfaces 2a, 2b in the closed position in the example illustrated here. In the case of this embodiment shown in Figure 1 it allows to position a first step of a stool to facilitate the ascent of the stool.

According to a first variant illustrated in FIGS. 2 and 3, the device 1 comprises a means of blocking the front structure 3 with respect to the intermediate structure 4 during the first translational movement T1. This means makes it possible to dissociate the first movement T1 from the second and third movements T2 and T3 to prevent interference of these two motion sequences. By this means, the front structure 3 and the intermediate structure 4 of the device 1 are kept immobile with respect to each other during the first translational movement T1.

In the embodiment of this first variant, illustrated in FIGS. 1 to 9, the blocking means consists of a roller 6 connected to the rear structure 7 bearing against a slice 50 of the main bar 5 of the scissors structure 35 of the front structure 3 of the device 1. The roller 6 remains in abutment against the edge 50 of the main bar 5 and blocks any vertical movement of the main bar 5 during the first translational movement Tl. Arrived at the end of the first translation movement Tl, the roller 6 is no longer in contact and in abutment with the edge 50 of the main bar 5, and the scissor structure 35 can then be raise. As illustrated in FIG. 4, the intermediate structure 4 of the device 1 is movable in translation relative to the rear structure 7 of the device 1 during the first translational movement T1. This makes it possible to slide the intermediate structure 4 out of the rear structure 7 by a forward movement, under the action of a means 12 such as a motor or an energy storage member such as a spring 120.

According to a second variant, the device 1 comprises a means of locking the rear structure 7 with the intermediate structure 4 during the second and third simultaneous translation movements T2 and T3. By this means, the intermediate structure 4 and the rear structure 7 are held immobile with respect to each other during the second and third translation movements T2 and T3. In the exemplary embodiment of this second variant illustrated in the details of FIGS. 2 and 7d, that is to say in FIGS. 3 and 9, the locking means comprises a trigger 8 attached either to the intermediate structure 4 of the device 1 or to the rear structure 7 of the device 1, and a stud 9 attached to the other structure among the intermediate structure 4 of the device 1 and the rear structure 7 of the device 1.

As illustrated in FIG. 3, the trigger 8 is attached to the rear structure 7 of the device 1, which clings to a stud 9 attached to the intermediate structure 4 of the device 1. A horizontal light 43 is arranged in the side walls. of the intermediate structure to pass a support 74 of the trigger 8 attached to the rear structure 7. The length of the light 43 corresponds to the travel of the device 1 during the first translational movement Tl. The support 74 of the trigger 8 supports an elastic return element such as a spring (not shown here) that holds the trigger 8 in a generally horizontal stable position. The trigger 8 also has a substantially perpendicular projection 8a directed downwards. This protrusion 8a comes into contact with the pin 51 situated on the main bar 5 of the scissors structure 35 of the front structure 3 of the device 1. When the device 1 is in the closed position and issuing the first translational movement Tl, the pin 51 of the main bar 5 bears on the protuberance 8a of the trigger 8 to hold the trigger 8 in a raised position against the elastic return element, and prevents the trigger 8 from catching on the stud 9 locking means. At the end of the first translation movement T1, the roller 6 of the rear structure 7 is no longer supported on the edge 50 of the main bar 5 as described above. This scissors structure 35 can then be deployed under the action of the torsion spring 131, and the pin 51 of the main bar 5 moves from the rear to the front in the groove 44 of the intermediate structure 4. The counter 51 n 'is then no longer in contact with the protrusion 8a of the trigger 8, and the elastic return means moves the trigger 8 to hook it to the stud 9 of the intermediate structure 4. This is intended to lock the intermediate structure 4 to the rear structure 7 during the second and third simultaneous translation movements T2 and T3.

The front structure 3 comprises the holding bar 32 which is connected on one side by a pivot connection to the scissor structure 35, and which on the other side has a sliding roller 33 in a horizontal groove 321 situated on the side walls. of the lower part 31 of the front structure 3. During the second and third translational movements T2 and T3 this support bar 32 which is horizontal when the device is in the closed position pivots to pass through a vertical position. A third tension elastic means 34 diagrammatically shown in FIG. 2 makes it possible to move this holding bar 32 beyond this vertical position and actuates a second trigger 36 placed on the front part 3 which locks the sliding roller 33 of the This holding bar 32 is then in a stable position by covering the sliding roller 33 by the trigger 36, which prevents the scissors structure 35 from folding. The use of the device 1 deployed is then secured by the locking of the second trigger 36 on the sliding roller 33 of the support bar 32. The third elastic means 34 is connected on one side to the sliding roller 33 and on the other side to the low structure 31, so as to exert a restoring force towards the second trigger

36. This third elastic means 34 reinforces the second means 13 such as the torsion spring 131 to deploy the front structure 3 by the second and third translation movements T2 and T3. Unlocking means of this holding bar 32 out of its abutment position is incorporated in the front structure 3 of the device 1. In the example illustrated in FIGS. 7a and 7b, an upward twist RI of the false plinth 41 movable on the front structure 3 of the device 1 makes it possible to actuate the rotation of a first gear wheel

37, which drives a first end of a belt 39. This belt 39 drives at another end a second toothed wheel 38 which by pivoting rotates and disengages the second trigger 36 of the sliding roller 33 of the holding bar 32, compresses the third resilient means 34 and ironing the support bar 32 by the vertical position. The holding bar 32 is then able to fold back, thereby allowing the scissors structure to fold back. A fourth alternative embodiment of the unblocking means of the holding bar not shown here may comprise a third motor controlled by a electric button coupled to an electronic card, or a remote control.

As illustrated in FIG. 1, a continuous support against the false plinth 41 towards the rear of the device 1 and a translational movement T4 towards the rear of the device 1 makes it possible to lower and fold the scissors structure 35 and to retract the front structure 3 towards the rear of the device 1. This movement also makes it possible to tension the second and third elastic means 131, 34 such as springs for the second and third translational movement T2 and T3. A fifth alternative embodiment using the second motor mentioned above and not illustrated here in place of the second elastic means 131 allows to control the folding of the device by a single means such as an electric button coupled to an electronic card, or a remote control. Due to the locking of the trigger 8 on the pad 9, the intermediate structure 4 and the rear structure 7 do not move during this support and this closing movement T4. At the end of folding of the scissors structure 35, the pin 51 located at the end of the main bar 5 of the scissors structure 35 comes into contact with the protuberance 8a of the trigger 8 and raises the latter, releasing the 9 and unlocking the two intermediate structures 4 and rear 7. The continuation of the closing movement then moves the intermediate structure 4 in the rear structure 7, continuing to tension the first means 12 such as a spring 120 allowing the first translational movement Tl. A sixth alternative embodiment using the first motor mentioned above (not shown here) in place of the first means 12 allows to control the folding of the device by a single means such as a button electric coupled to an electronic card, or a remote control.

At the end of displacement of the intermediate structure 4 in the rear structure 7 the holding means 71 push-release are actuated by the intermediate structure 4 to block the deployment of the device 1. According to a seventh alternative embodiment not shown here, the systems The holding means may consist of a lock electrically controlled by a single means such as an electric button coupled to an electronic card, or a remote control. The holding system can also be integrated into the first motor or coupled to it. During the entire displacement of the intermediate structure 4 in the rear structure 7, the roller 6 of the rear structure 7 is supported on the edge 50 of the main bar 5 of the scissor structure 35 of the front structure 3 and prevents its deployment. . According to an eighth alternative embodiment illustrated in FIGS. 2 and 4, for use of the device close to the ground, wheels 310 are positioned on the lower part 31 of the front structure 3 to facilitate deployment of the device 1.

According to a ninth alternative embodiment not illustrated here, the intermediate portion 4 also comprises wheels to facilitate the deployment of the device 1. According to the embodiment described in Figures 4 and 5 in the closed position, the structures before 3 and 4 intermediate of the device are contained in the space formed by the rear structure 7 of the device. This makes it possible to have a compact device in the closed position.

According to a third variant illustrated in FIG. 10, the surfaces 2a, 2b, 2c form drawers 20a, 20b, 20c. This makes it possible to use this device to make a set of shallow drawers retractable in a housing of a deep furniture. This allows to have, when the device 1 is in the closed position, the successive shallow drawers and shifted relative to each other occupying a space defined by the housing of the furniture. When the device is in the open position these shallow drawers are advantageously offset relative to each other in a different configuration, the drawers being superimposed or not, putting them within reach of the user. This makes it possible to use and make available more efficiently the storage area defined by the deep furniture housing.

According to a fourth variant illustrated in Figures 1 to 9, the surfaces 2a, 2b, 2c form platforms such as steps. This allows the device 1 to be used to make a step when the set is placed near the ground. According to a fifth variant not illustrated here, the surfaces 2a, 2b, 2c also form platforms such as shelves, this allows the device 1 to be used to produce a set of retractable shelves in a housing of a piece of furniture.

According to a sixth variant illustrated in FIG. 11, a com partiment 10 comprising a device 1 according to one of the preceding characteristics is realized. This compartment 10 can be mobile. It is thus possible to produce a product display marmot comprising a set of drawers 20a, 20b, 20c arranged in this device 1. This has the advantage for a sales representative of carrying a display for a simple trade show. to transport and deploy. In addition, storage and handling are facilitated in the form of, for example, a suitcase. A step can be made with this device and housed in a suitcase to simplify its storage. It can also be realized a large step, which can be de- placed to access the upper part of the store shelves, and can be compacted to fit under a shelving. It is thus necessary to have only one step for all the shelving, which brings a significant saving of space and economic advantage.

According to a seventh variant not illustrated here, a piece of furniture having at least one housing comprising a device 1 having one or more of the features described above can be realized. A furniture manufacturer can thus propose a modular furniture with at least one deployable drawer made with this device 1 in place of a standard drawer, having the advantages mentioned above. A step made with this device 1 having one or more of the features described above can thus be used at ground level in a lower housing of the furniture. The extended step allows access to the upper part of the furniture, and it can be compacted with the device in the closed position to be stored in the housing under the cabinet discreetly.

According to an embodiment not illustrated here, the piece of furniture comprises a device 1 which has one or more of the characteristics described above and which comprises at least three assembly means 11 of the device 1 with respect to the piece of furniture as illustrated in FIG. 8. This allows easy assembly of the device 1 relative to the furniture. These assembly means 11 also make it possible to simply center the device under the piece of furniture and to maintain the piece of furniture, at the same time as these assembly means make it possible to ensure a satisfactory support of the device 1 on the floor. . The assembly means illustrated here is configured for mounting in the space defined by the lower part of a piece of furniture and the floor. This assembly means comprises an upper ring 110 and a lower ring 111 connected to the rear structure 7 of the device 1, centered on the same axis 00 '. A hollow rod 112 along the same axis 00 'is slidably mounted in translation in the upper ring according to the axis 00'. This hollow rod has anti-rotation means 113 with respect to the upper ring 110. A pad 114 drilled and threaded along the axis 00 'is rotatably mounted in abutment on the upper part of the ring. lower 111 device 1. this pad comprises on its outer periphery facets 115 adapted to cooperate with a key for rotating the pad about the axis 00 '. The hollow rod 112 has an upper shoulder 112a. The hollow internal space of the rod is threaded. A screw 116 is inserted into the hollow rod 112. The screw 116 has a stepped head 116a. The cabinet has a through hole not shown here through which is inserted the screw 112. During screwing, the wall of the cabinet is held between the shoulder 116a of the screw 116 and the upper shoulder 112a of the rod 112. The rod hollow 112 slides in the upper ring 110 to ensure a positioning of the device 1 relative to the furniture and leave the device 1 in contact with the ground. The screw 116 is inserted into the pad 114. The rotation of the pad 114 by the use of a wrench on the facets 115 located at the outer periphery of the pad 114 makes it possible to move the pad 114 downwards and to press it on the lower ring 111 and thus press the device against the ground. The use of three assembly means 11 between the furniture and the device 1 allows improved centering of the device relative to the furniture, and ensure a good support of the device 1 against the ground.

Figures 13 to 22 illustrate a second embodiment of the invention. Parts that do not change from the first embodiment are given the same references. The second embodiment differs from the first mode by the locking means 8 'of the front structure 3 with respect to the intermediate structure 4 and by the synchronization of the second and third movements T2, T3 between them.

The locking means 8 'comprises a latch 80 pivotally mounted in the middle on the intermediate structure 4', the latch 80 having a hook 81 cooperating with a striker 82 of the front structure 3 ', and a wheel 83 at the end of the latch 80 opposite the hook 81. The locking means 8 'further comprises a runway 84 for the wheel 83 carried by the rear structure, extending horizontally and rising vertically at its front end to form a lift 840. Thus, when the wheel 83 rolls on the runway 84, the hook 81 is engaged in the striker 82 and when the latch 80 is released by the vertical lift 840, the latch 80 pivots and disengages the hook 81 of the striker 82 to release the front portion 3 'of the intermediate portion 4'. At this time, the wheel 83 forms a stop against the lift 840 and prevents the intermediate structure 4 'to start backwards. The locking means 8 'further comprises an unlocking cleat 85 projecting from the front part and designed to act on the latch 80 during the reverse movement to the second movement, of translation of the front part towards the rear. The trajectory of the cleat 85 is intended to interfere with the latch 80 at the hook 81 to push it into the striker 82 and restore the connection between the front structure 3 'and the intermediate structure 4'. In the same pivoting movement of the rocker 80, the wheel 83 is released from the ascent 840 of the track 84, which releases the intermediate structure 4 'and allows it to perform the reverse movement to the first movement Tl.

Furthermore, the blocking means 6 'comprises a stud 60 mounted on the main bar 5' cooperating with a cam groove 61 carried by the intermediate structure 4. The cam groove 61 has a general shape Z and thus comprises a first portion 611 of horizontal direction to maintain horizontal the main bar 5 during the second translational movement, followed by a second portion 612 releasing the pin 60, and therefore the main bar 5, to begin the third translational movement T3, then a third portion 613 of horizontal direction to allow the sliding of the structure before 3 'further forward.

The device further comprises elastic means tending to slide the front portion 3 'forwardly relative to the intermediate portion 4', such as tension springs stretched between the front of the intermediate portion 4 'and the rear of the front part 3 ', not shown.

The front structure 3 'further comprises a carriage 312 slidably mounted in the main direction XX', the carriage 312 extending transversely to the main direction, as shown in FIG. 15. The carriage 312 pivotally receives the end lower of the support bars 32 and allows their synchronous neck. The carriage 312 is tensioned by elastic means from front to rear such as a carriage spring 313. The holding bar 32 is engaged between a horizontal position in the closed position and a locking position in the deployed position. , as shown in Figure 13, the bar passing through a vertical position between the horizontal position and the locking position. Thus, the resilient means 313 tend to move the holding bar from the horizontal position to the locking position, accompanying the deployment of the scissor structure. The lower part 31 'comprises a retraction mechanism 90 comprising a maneuvering member accessible from the front, namely the false plinth 41, and an actuator 91 set in motion by the operating member 41 to push the holding bar 32 from the lock position beyond the vertical position. The actuator 91 has a first gear wheel 911 meshing with a second gear wheel 912 to which a cam 913 is attached. A cable 914 is attached at a first end to the cam 913 and is partially wrap. The other end of the cable 914 is stretched by a cable spring 915 after a passage on a return 916. A pusher 917 is fixed on the cable 914 and is able to bear against the carriage 312 in the direction of the position of blocking forward.

In operation, from the closed position, the user pushes on the false skirting board so that the push - release means 71 are actuated and release the intermediate part 4 ', which moves forward in the first movement Tl under the effect of spring 12. The front portion 3 ', secured to the intermediate portion 4' through the hook 81 of the latch 80, performs the same movement. The wheel 83 of the rocker 80 rolls on the track 84 and keeps the hook 81 engaged in the keeper 82 until the lift 840. Under the effect of a spring or a counterweight, the rocker 80 pivots so that the wheel 83 follows the lift 840 and the hook 81 is released from the striker 82, which releases the front portion 3 'relative to the intermediate portion 4'. At this moment, the intermediate portion 4 'is in abutment in the forward direction, for example by the end of travel of the spring 12, and towards the the back by the wheel 83 resting on the lift 840. It is blocked.

The front portion 3 'continues the second movement, the pin 60 sliding in the first portion 611 of the cam groove 61, thus maintaining the scissor structure 35 in the closed position. Then when the front portion 3 'is sufficiently advanced, so as to disengage as much as possible from the walls intended to be placed above, the stud 60 engages in the second portion 612 of the cam groove 61 and thus releases the structure in scissors 35 which starts the third movement T3 under the effect of the torsion spring 131 'on the one hand and the carriage spring 313, as shown in FIG. 20. The lift is only partial and the movement must be com with the help of the user. The last phase of the movement T3 is combined with a free translation of the front portion 3 'forward, the pin 60 sliding in the third portion 613 of the cam groove 61. During this movement, the carriage 312 moves towards the front. rearward and drives the retaining bars 32 j to the locking position in which the carriage 312 abuts. The open position is then reached. Any sliding movement of the front part 3 'would be stopped by contact with the wall P above the rear part. Also, it is possible to provide thrust buffers, not shown, in extension of the first support bars 355, or alternatively a brake to be actuated to lock the wheels 310 of the front part 3 '.

For the storage operation to the closed position, the user exerts a thrust which induces a twisting of the false plinth 41 so as to actuate the retraction mechanism 90. The pivoting of the gears 911, 912 and the cam 913 causes pulling on the cable 914 against the cable spring 915 so as to bring the pusher 917 against the carriage 312 and drive the latter against the carriage spring 313 until it exceeds the vertical position of the bars of 32. The action on the plinth 41 also causes the front portion 3 'to move back against the tension springs, the pin 60 sliding in the third portion 613 of the cam groove 61 to the second cam portion 612. . The scissor structure 35 partially begins to retract, then it is necessary to exert pressure on the scissor structure 35 or surfaces for compressing the torsion spring 131 'and the carriage spring 313. The pin 60 then reaches the first portion 611 of the cam groove 61 in which it engages by the continuation of the exerted pressure by the user. At the end of the path of the pin 60 in the first cam portion 611, the unlocking tab 85 comes into contact with the latch 80 near the hook 81 and pivots the latch 80 to push the hook 81 into the striker 82. the same time, the wheel 83 is released from the lift 840, which allows the continuation of the movement unlike the movement T1, by compressing the spring 12. Arrived in abutment, the holding means 71 push-release lock the part intermediate 4 'in closed position.

Claims

1. Device (1) comprising at least a first surface (2a) according to a first plane P and a second surface (2b) according to a second plane P' parallel to the first plane P, said device (1) being deployable from a position closed to an open position, the device (1) passing from the closed position to the open position by a first translation movement (Tl) of an intermediate structure (4) oriented forwards in a main horizontal direction and by second and third translation movements (T2, T3) respectively forwards and upwards, the two surfaces (2a, 2b) being offset relative to each other when the device (1) is in the open position , characterized in that when the device (1) is in the closed position the two surfaces (2a, 2b) are offset and parallel to the first and second plane (P, P'), and in that a projected Sa of the first surface (2a) on a horizontal plane and a projection Sb of the second surface (2b) on the same horizontal plane are distinct.

2. Device according to claim 1, characterized in that the two surfaces (2a, 2b) are supported by a front structure (3) comprising a lower part (31) and a scissor structure (35) comprising two sub-assemblies of on either side of the surfaces (2a, 2b).

3. Device according to claim 2, in which each subassembly comprises a main bar (5), a first support bar (355) for supporting the first surface and pivotally mounted at the high end of the main bar (5) , a first connecting rod (351) pivotally mounted also at the high end of the main bar (5), and a second connecting rod (352) in alignment with the first link in the open position and pivotally mounted on the lower part (31).

4. Device according to claim 3, in which the subassembly further comprises a second support bar (356) parallel to the first support bar (355) and pivotally mounted on the first connecting rod (351) on the same axis as the second second connecting rod (352), a third connecting rod (353) parallel to the first connecting rod connection (351) and pivotally connected to the first and second support bar (356), such that the pivot axes of the first and third connecting rod (351, 353) are distributed at the vertices of a first parallelogram me.

5. Device according to claim 4, in which the subassembly further comprises a fourth connecting rod (354) parallel to the second connecting rod (352) and pivotally connected to the second support bar (356) and to the lower part (31) so that the pivot axes of the second and the fourth connecting rod (352, 354) are distributed at the vertices of a second parallelogram.

6. Device according to claim 5, in which the subassembly further comprises a holding bar (32) pivotally mounted on the second support bar (356) at one end and mounted sliding and pivoting at the second end on the lower part in the main horizontal direction (XX') so as to form a locking leg of the second support bar (256) in the deployed position while being substantially vertical.

7. Device according to claim 6, in which the holding bar (32) struggles between a horizontal position in the closed position and a blocking position in the deployed position, the holding bar (32) passing through a vertical position between the position horizontal and the blocking position, the lower part (31') comprising a retraction mechanism (90) comprising an operating member (41) accessible from the front, and an actuator (91) set in motion by the member maneuver (41) to push the retaining bar (32) from the blocking position beyond the vertical position.

8. Device according to claim 5, in which the elements of the scissor structure are arranged in a transverse direction in the following manner, from the outermost towards the innermost:

> the main bar (5);

> the first support bar (355); > the third connecting rod (353);

> the first connecting rod (351);

> the second connecting rod (352), pivotally mounted outside a vertical wing (311) of the lower part (31);

> the second support bar (356);

> the fourth connecting rod (354), pivotally mounted inside the vertical wing (311) of the lower part (31).

9. Device according to one of claims 3 to 8, in which each sub-assembly further comprises a control rod (350) pivotally mounted on the main bar in its middle, the control rod (350) being pivotally mounted at a front end of the intermediate structure (4) so as to link the second and third simultaneous translation movements (T2, T3).

10. Device according to claims 8 and 9 taken in combination, in which the control rod (350) is placed on the interior side of the intermediate structure (4) between the intermediate structure (4) and the main bar (5).

11. Device according to one of claims 2 to 8, in which the front structure (3) of the device (1) is movable in translation relative to the intermediate structure (4) of the device (1) during the second and third movements simultaneous translation (T2, T3).

12. Device according to claim 11, characterized in that it comprises means for blocking the front structure (3) relative to the intermediate structure (4) during the first translation movement (Tl).

13. Device according to claim 12 characterized in that the blocking means consists of a roller (6) of a rear structure (7) bearing on the main bar (5) of the front structure (3) of the device (1).

14. Device according to claim 12 characterized in that the blocking means comprises a stud (60) mounted on the main bar (5) cooperating with a cam groove (61) carried by the intermediate structure (4), the cam groove (61) comprising a first portion (611) of horizontal direction to keep the main bar (5) horizontal during the second translation movement, followed by a second portion (612) releasing the pin (60), and therefore the main bar (5), to begin the third translation movement (T3), then a third portion (613) of horizontal direction to allow the sliding of the front structure (3') further forward.

Device according to one of the preceding claims, characterized in that the intermediate structure (4) of the device (1) is movable in translation relative to a rear structure (7) of the device (1) during the first translation movement (Tl ).

Device according to claim 15, characterized in that it comprises means for locking the rear structure (7) with the intermediate structure (4) during the second and third simultaneous translation movements (T2, T3).

Device according to claim 16, characterized in that the locking means comprises a trigger (8) attached either to the intermediate structure (4) of the device (1) or to the rear structure (7) of the device (1), and a stud (9) attached to the other of the structures among the intermediate structure (4) of the device (1) and the rear structure (7) of the device

(!) ^■

Device according to claim 16, characterized in that the locking means comprises a rocker (80) pivotally mounted in the middle on the intermediate structure (4'), the rocker (80) comprising a hook (81) cooperating with a keeper ( 82) of the front structure (3'), and a wheel (83) at the end of the rocker (80) opposite the hook (81), the locking means further comprising a rolling track (84) for the caster (83) extending horizontally on the rear structure and rising vertically at its front end such that when the caster (83) rolls on the rolling track (84), the hook (81) is engaged in the striker (82) and when the rocker (80) is released by the raising (840) vertical, the rocker (80) pivots and disengages the hook (81) of the striker (82) to release the front part (3') from the intermediate part (4').

19. Device according to one of the preceding claims, characterized in that in the closed position, front (3) and intermediate (4) structures of the device (1) are contained in the space formed by a rear structure (7 ) of the device (1).

20. Device according to one of the preceding claims, characterized in that the surfaces (2a, 2b) form drawers (20a, 20b).

21. Device according to one of the preceding claims, characterized in that the surfaces (2a, 2b) form platforms (21a, 21b).

22. Compartment characterized in that it comprises a device (1) according to one of the preceding claims.

23. Furniture presenting at least one housing characterized in that it comprises a device (1) according to one of claims 1 to 21.

24. Furniture according to claim 12, characterized in that the device (1) comprises at least three means of assembly (11) of the device (1) relative to the furniture.