FR3052347A1 - DEPLOYMENT DEVICE - Google Patents

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 deployable from a closed position to an open position, the device 1 passing from the closed position to the open position by a first translation movement oriented towards the front and by second and third translation movements respectively forward and upward, the two surfaces 2a, 2b being offset one relative to the 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 that a projected of the first surface 2a on a horizontal plane and a projected second surface 2b on the same horizontal plane are distinct.

Description

DEPLOYMENT DEVICE DESCRIPTION

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

State of the art

In his home, in a company or business, it is common to have 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 the furniture close to the ground, the user must kneel to, with his folded arm, access the rear area of the storage spaces. Access is also difficult when storage spaces are located in the furniture 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 units, by proposing a device for deploying surfaces such as: - Form platforms forming a step to access the high parts of a storage, - Form a drawer for easy access to the bottom area of this drawer, - Shape a platform forming a shelf for easy access to the rear area of this storage space.

It is known from the prior art furniture, comprising a base with a drawer, and a folding step ladder received in the drawer. The ladder assembly is configured to pull out of the drawer and rise to an unfolded position to form a two-step ladder when the drawer is open. It is known to have a deployment of the stepladder assembly activated by pressure on a first control member placed at the front of the drawer.

It is known that the drawer opens and slides automatically, by a translational guiding mechanism, and that means for moving in translation movement out of the drawer all step ladder; 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 a motor that 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 insecure the rise of this stool, 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 can stack only few steps.

This solution is not suitable for the realization of storage spaces such as drawers compartments superimposed 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 unit or to make compartments forming drawers satisfactory.

This solution is 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 encroaching on the directly lower shelves.

The known solutions do not make it possible to respond satisfactorily to these different applications.

It is also known in the prior art retractable folding stool having at least one step, which is housed in the closed position either below a piece of furniture or in a suitcase. The extraction of under furniture is 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 steps superimposed as the previous prior art, for the realization of a stepladder, or the transposition to the realization of drawers or shelves.

There is therefore a real need for a device to overcome these defects, 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 an open position, the device passing from the closed position to the open position by a first translation movement oriented towards the front and by second and third translation movements respectively forward and upward, 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 in that a projected the first surface on a horizontal plane and a projected the second surface on the same horizontal plane are distinct.

This makes it possible to store the surfaces side by side and to use all the 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.

This also allows to store a plurality of surfaces forming shelves or steps depending on the depth of the storage space and not according to 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 individually or in combination.

Advantageously, the two surfaces are supported by a front structure of the device, movable in translation relative to an intermediate structure of the device during the second and third simultaneous translation movements. The front structure includes scissor bars that support the surfaces. The front structure and the bars unfold and position the surfaces in two positions when the device is in the open position or in the closed position. These bars are movable in translation and / or rotation in the front structure, under the action of a motor or an energy storage member such as a spring.

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 unfolds before it is completely out of the storage space. This prevents the device does not hit the top 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 resting on a deployment 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.

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 means for 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 motionless 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 the intermediate structure of the device or to the rear structure of the device, and a stud attached to the other of 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 simultaneous translation movements.

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 allows the use of this device to achieve a retractable set of shallow drawers in a housing of a deep furniture.

According to a fourth variant, the surfaces form platforms. This allows the device to be used 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 assembly means of the device relative to the piece of furniture. This reduced number of assembly means makes it possible to limit the holes to be made in the piece of furniture, 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. Other advantages may still appear to those skilled in the art on reading the examples below, illustrated by the appended figures, given for illustrative purposes.

Brief description of the figures

FIG. 1 represents a perspective view of a deployment device according to the invention in an open position

Figure 2 shows the device of Figure 1 in the open position.

Figure 3 shows a detail view III of Figure 2 of a locking means.

Figure 4 shows a perspective view of the deployment device of Figure 1 in the closed position.

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

FIGS. 6a, 6b, 6c, 6d show 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 the deployed position.

Figures 7a, 7b, 7c, 7d show different sectional view along a vertical plane passing through an axis XX 'indicated in Figure 1, the device of Figure 1 during the steps of Figures 6a, 6b, 6c, 6d respectively.

FIG. 8 represents a view of detail VIII of FIG. 6d

Figure 9 shows a detail view IX of Figure 7d

Figure 10 shows a perspective view of a second embodiment of the device in the open position.

Fig. 11 is a perspective view of an exemplary compartment having a device in the closed position.

Example of embodiment of the device 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 merged with a horizontal plane.

The device 1 illustrated in FIGS. 1 to 9 comprises a front part 3, an intermediate part 4, a rear part 7.

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

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

The front part 3 comprises a lower part 31, a scissors structure 35, first and second surfaces 2a, 2b cooperating with the scissor structure 35, a third surface 2C supported by the lower part 31, a holding bar 32, and a false plinth 41.

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 as shown in Figure 6d.

The surfaces 2a, 2b may be steps as illustrated in Figure 1 in the case of using the device to form a staircase, or drawers 20a, 20b, as shown in Figure 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.

In the embodiment illustrated in Figures 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 each other when the device is in the open position.

According to a first alternative embodiment not illustrated here, the two surfaces 2a, 2b are offset without covering 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 as illustrated in FIG. 4.

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 displacement of the device 1 to the device 1 before 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.

The open position of the device 1 corresponds to the deployed device as illustrated in FIG.

The transition from the closed position to the open position is effected by a first translation movement Tl oriented towards the front and by second Τ2 and third T3 translation movements respectively forward and upward.

The first translation movement T1 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 translation 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 schematized 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 illustrated here, a first motor is used as means 12 for performing the first translational movement T1, 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 relative to the intermediate structure 4, and the scissor structure 35 which comprises bars. These bars cooperate with each other and with the lower part 31 by pivot connections. The intermediate structure 4 also comprises a horizontal groove 44, opening, in which slides horizontally a pin 51 connected to a 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 allowed via the main bar 5 of the scissors structure 35.

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 two different bars.

The torsion spring 131 is connected to two bars of the scissors structure 35 of the front structure 3 of the device 1 so as to exert a torsional stress on the scissors structure 35 when in the folded position.

A third alternative embodiment not illustrated here uses a second motor as a second means 13 for performing the second and third translational 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 according to a sixth translation movement opposite to the first translational movement T1.

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 offset with respect to one another without juxtaposition of in 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 those skilled in the art a greater number of surfaces connected to the scissors structure. 35 of the device 1.

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 other two surfaces described. Indeed this surface 2c is juxtaposed 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 means for blocking the front structure 3 with respect to the intermediate structure 4 during the first translational movement Tl. This means makes it possible to dissociate the first movement Tl from the second and third movements T2 and T3, to prevent interference of these two sequences of movements. By this means, the front structure 3 and the intermediate structure 4 of the device 1 are held immobile with respect to each other during the first translational movement T1.

In the exemplary 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 resting against a wafer 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 T1. Arrived at the end of the first translational movement T1, 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 rise.

As illustrated in FIG. 4, the intermediate structure 4 of the device 1 is movable in translation with respect 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 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 to one of the intermediate structure 4 of the device 1 and of the rear structure 7 of the device 1, and a stud 9 attached to the other of 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 T1. The support 74 of the trigger 8 supports an elastic return element such as a spring (not shown here) which keeps 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 located 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 during the first translational movement Tl, the pin 51 of the main bar 5 bears on the protrusion 8a of the trigger 8 to hold the trigger 8 in a raised position against of the resilient return element, and prevents the trigger 8 from hooking on the stud 9 of the 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 a torsion spring 131, and the pin 51 of the main bar 5 moves from the rear towards the front in the groove 44 of the intermediate structure 4.

The pin 51 is then no longer in contact with the protuberance 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 support 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 located on the side walls. of the lower part 31 of the structure before 3.

During the second and third translational movements T2 and T3 this holding 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 bar 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 deployed device 1 is then secured by the locking of the second trigger 36 on the sliding roller 33 of this holding 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 for deploying 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 a front structure 3 of the device 1 makes it possible to actuate the rotation of a first toothed 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 elastic means 34 and makes iron 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 include a third motor controlled by an 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 protrusion 8a of the trigger 8 and raises the latter, releasing the 9 and unlocking the two intermediate structure 4 and rear 7.

Continuing 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 for the first translational movement T1.

A sixth alternative embodiment using the first motor mentioned above (not shown here) in place of the first means 12 makes it possible to control the folding of the device by only one means such as an electric button 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 illustrated here, the holding systems may consist of a lock electrically controlled by only one 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 FIGS. 4 and 5 in the closed position, the front 3 and intermediate 4 structures 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 allows the use of this device to achieve a retractable set of shallow drawers 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 shown here, the surfaces 2a, 2b, 2c also form platforms such as shelves, this allows the device 1 to be used to make a set of retractable shelves in a housing of a piece of furniture.

According to a sixth variant illustrated in FIG. 11, a compartment 10 comprising a device 1 according to one of the preceding characteristics is produced. This compartment 10 can be mobile.

It is thus possible to make a product display marmot 10 comprising a set of drawers 20a, 20b, 20c disposed in this device 1. This has the advantage for a sales representative to carry a display for trade show easy to carry 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 bag to simplify storage. It can also be realized a large step, can be moved to access the top of the store shelves, and can be compacted to go under a shelving shelving. It is thus necessary to have only one step for all the shelving, which brings a saving of space and a significant 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 characteristics described above can be realized.

A furniture manufacturer can thus offer a modular furniture with at least one deployable drawer made with this device 1 instead 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 deployed step provides access to the upper part of the furniture, and it can compact 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 previously and which comprises at least three assembly means 11 of the device 1 with respect to the piece of furniture as illustrated in FIG.

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 along the axis 00'. This hollow rod has anti-rotation means 113 with respect to the upper ring 110.

A pad 114 pierced and threaded along the axis 00 'is rotatably mounted bearing on the upper part of the lower ring 111 of the device 1. this pad comprises on its outer periphery facets 115 adapted to cooperate with a key to rotate the skate around the 00 'axis.

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 shoulder head 116a.

The furniture has a through hole not shown here through which is inserted the screw 112.

During screwing, the wall of the furniture is held between the shoulder 116a of the screw 116 and the upper shoulder 112a of the rod 112. The hollow rod 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.

Claims (13)

1. Device (1) comprising at least a first surface (2a) in a first plane P and a second surface (2b) along 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 translational movement (T1) oriented towards the front and by second and third translational movements (T2, T3) respectively to forward and upward, the two surfaces (2a, 2b) being offset relative to one another when the device (1) is in the open position, characterized in that when the device (1) is in closed position, the two surfaces (2a, 2b) are offset and in 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. 2. Device according to claim 1, characterized in that the two surfaces (2a, 2b) are supported by a front structure (3) of the device (1) movable in translation relative to an intermediate structure (4) of the device (1). ) during the second and third simultaneous translation movements (T2, T3). 3. Device according to claim 2, characterized in that it comprises a means of locking the front structure (3) relative to the intermediate structure (4) during the first translational movement (T1). 4. Device according to claim 3 characterized in that the locking means consists of a roller (6) of a rear structure (7) resting on a deployment bar (5) of the front structure (3) of the device (1). 5. Device according to claim 3, 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 translational movement (T 1 ). 6. Device according to claim 5, characterized in that it comprises a means of locking the rear structure (7) with the intermediate structure (4) during the second and third simultaneous translational movements (T2, T3). 7. Device according to claim 6, characterized in that the locking means comprises a trigger (8) attached 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 intermediate structure (4) of the device (1) and the rear structure (7) of the device (1). 8. Device according to claim 1, 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). 9. Device according to one of claims 1 to 8, characterized in that the surfaces (2a, 2b) form drawers (20a, 20b). 10. Device according to one of claims 1 to 8, characterized in that the surfaces (2a, 2b) form platforms (21a, 21b). 11 .Compartiment characterized in that it comprises a device (1) according to one of the preceding claims. 12. Furniture having at least one housing characterized in that it comprises a device (1) according to one of claims 1 to 10. 13. Furniture according to claim 12, characterized in that the device (1) comprises at least three assembly means (11) of the device (1) relative to the furniture.