ES2556052T3 - Suspension device for a bed base with adjustable rigidity - Google Patents

Abstract

Suspension device (510, 510', 610, 710) for a mattress or base, consisting of: - an upper section (512, 612, 712) provided with a plate (514, 614, 714) capable of supporting a mattress; - a lower section (520, 520', 620, 720) comprising means that allow the suspension device to be fixed to the bed frame or to the base, said lower section being joined to the upper section by means of suspension means (630, 730 ); - means for modifying the rigidity of the suspension device, consisting of a mobile element (540, 540', 640, 740) with respect to the suspension device in such a way that it can move at least between a first position and a second position to modify the stiffness of the suspension device; in which the mobile element (540, 540', 640, 740) is provided with at least one first elastic body that is configured to deform elastically when the mobile element is brought from one position to another, characterized in that the mobile element is capable of pivoting with respect to the suspension device about at least one first axis of rotation (X1) integral with the lower section to move from one position to another.

Description

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Suspension device for a bed base with adjustable rigidity DESCRIPTION

Background of the invention

The present invention relates to the field of elastic suspension of bed bases and bases for sofas or armchairs. This refers in particular, but not exclusively, to the elastic suspension of slats of a slatted bed base.

This refers more particularly to a suspension device for a box spring or a base, consisting of:

♦ an upper section provided with a plate capable of supporting a mattress;

♦ a lower section consisting of means that allow the fixing of the suspension device to the bed base or to the base, said lower section being connected to the upper section by means of suspension means;

♦ means for modifying the rigidity of the suspension device.

Said suspension device is described in particular in document FR 2 945 195. In this document, the means for modifying the rigidity of the suspension device consist of a rigid stiffening element that is housed between one or the other of the lower section and upper section , and of a spring element of the suspension device. In this way, the coupling made leads to increase the rigidity of the spring element, and therefore that of the suspension device.

A drawback of this suspension device lies in the fact that the presence of the stiffening element substantially reduces the amplitude of deformation of the suspension device. It is therefore necessary a great force to deform the suspension device, which can undermine the impression of comfort given by the suspension device.

On the other hand, documents DE 296 11 876 U1 and EP 0 920 824 A2 also disclose conventional suspension devices with modifiable stiffness.

Object and summary of the invention

An objective of the present invention is to propose a spring suspension device with adjustable stiffness that has an improved comfort curve.

A device according to the present invention is a suspension device for a bed base or a base, consisting of:

• an upper section provided with a plate capable of supporting a mattress;

• a lower section comprising means that allow the fixing of the suspension device to the bed base, said lower section being connected to the upper section by means of suspension means;

• means for modifying the rigidity of the suspension device, which consists of a movable element with respect to the suspension device such that it can be moved at least between a first position and a second position to modify the rigidity of the suspension device. This mobile element is provided with at least a first elastic body that is configured to deform elastically when the mobile element is carried from one position to another. This mobile element is capable of pivoting with respect to the suspension device about at least a first axis of rotation integral with the lower section to move from one position to another.

In this way, the mobile element is elastically deformable so that it actively participates in the modulation of the rigidity of the suspension device.

In some embodiments, the mobile element may have a first position in which the mobile element exhibits a first stiffness when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said first stiffness.

In particular, in the first position, when a pressure is applied on the suspension device, the first elastic body can adopt a first configuration capable of elastically deforming to exert a return force with a first stiffness R1. Thus, in this first position, the first elastic body can present this first stiffness R1 when a pressure is applied on the suspension device and make an elastic coupling between the upper section and the lower section with said first stiffness R1.

In some embodiments, the mobile element may have another position, called "second position", which is different from the first position, and in which the mobile element is not capable of performing said elastic coupling between the upper section and the section lower with said first stiffness, when a pressure is applied on

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The suspension device.

In particular, in the second position, when a pressure is applied on the suspension device, the first elastic body may be such that it is not capable of exerting said return force with said first stiffness R1 and is not capable of performing said elastic coupling between the upper section and the lower section with said first stiffness R1.

In some embodiments, the suspension means may have a stiffness called "suspension" Rs when a pressure is applied on the suspension device, and the suspension means and the movable element may be configured so that said suspension stiffness Rs do not change, when the mobile element is carried from one position to another (in particular when the mobile element moves between the first position and the second position).

In particular, the value of the suspension stiffness Rs can be independent of the position occupied by the mobile element with respect to the suspension device.

In some embodiments, the suspension means may be able to elastically deform with a displacement capacity (an amplitude of displacement or deformation) that does not vary when the mobile element is carried from one position to another (in particular when the element mobile moves between the first position and the second position).

In this way, the suspension means can adopt a so-called "suspension" configuration that, in order to exert a return force with said suspension stiffness Rs, is able to deform elastically with a predetermined displacement capacity, when a pressure is applied on the suspension device; and the suspension means and the mobile element may be configured so that said suspension configuration remains unchanged when the mobile element is moved from one position to another.

In particular, said displacement capacity can be independent of the position occupied by the mobile element with respect to the suspension device.

In some embodiments, the device may be such that, when a pressure is applied on the suspension device while the movable element adopts its first position, the upper section and the lower section move relative to each other in a travel predetermined displacement, and the suspension means and the first elastic body are compressed and elastically deformed simultaneously in at least a part of said displacement path.

In this way, the suspension means and the first elastic body of the mobile element in its first position can be coupled in parallel in at least this part of said travel path, when a pressure is applied on the suspension device. The suspension stiffness Rs and the first stiffness R1 can therefore be coupled in parallel in at least this part of said travel path.

In particular, these rigidities Rs and R1 can be mutually added in at least this part of said travel path, when a pressure is applied on the suspension device while the mobile element occupies its first position.

In some embodiments, the suspension means may have the suspension stiffness Rs when a pressure is applied on the suspension device, such that a main elastic coupling is made between the upper section and the lower section with said stiffness Rs , while the first elastic body may have the first stiffness R1 when this pressure is applied on the suspension device while the mobile element occupies its first position, such that a secondary (complementary) elastic coupling is made between the upper section and the lower section with said first stiffness R1.

In particular, these main and secondary elastic couplings can be made separately from each other and added to each other in at least a part of said travel path, when a pressure is applied on the suspension device while the mobile element occupies its first position.

In some embodiments, the first elastic body of the movable element in its first position can be compressed and elastically deformed only after a slight displacement of the upper section and the lower section relative to each other, when a pressure is applied on the suspension device In particular, the elastic coupling between the upper section and the lower section with the first stiffness, which is the result of compression and elastic deformation of the first elastic body when a pressure is applied on the suspension device while the mobile element adopts its first position can be carried out effectively only after this slight displacement of the upper section and the lower section relative to each other.

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Elastic body has a second stiffness, different from the first stiffness, when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said second stiffness.

Thus, in this second position, when a pressure is applied on the suspension device, the first elastic body can adopt a second configuration, different from the first configuration, capable of elastically deforming to exert a return force with a second stiffness. R2, different from the first stiffness R1, and performing an elastic coupling between the upper section and the lower section with said second stiffness R2.

Therefore, when the mobile element is brought to its second position from its first position, the first elastic body is no longer capable of exerting a return force with the first stiffness R1 and is no longer capable of performing an elastic coupling between the upper section and the lower section with said first stiffness R1. On the contrary, the first elastic body is then capable of exerting a return force with the second stiffness R2 and is capable of performing an elastic coupling between the upper section and the lower section with said second stiffness R2.

In particular, two different rigidities R1 and R2 can be advantageously obtained with a single first elastic body, simply by providing this first elastic body differently with respect to the suspension device, by means of the clearance of the movement of the mobile element between its first position and his second position.

In particular, the first elastic body can adopt a first shape configuration, when the mobile element adopts its first position, and a second shape configuration, different from the first, when the mobile element adopts its second position. The passage from one shape configuration to another can be done by an elastic deformation of the first elastic body that causes it to move the mobile element from one position to another. In addition, since this elastic deformation is the result of a movement of the mobile element from one position to another, this elastic deformation can be operated while the suspension means are kept at rest (eg operated without having to apply pressure on the suspension device that seeks an approach of the upper section and the lower section relative to each other).

In some embodiments, the first shape configuration may be such that, in the first position, the first elastic body exhibits a first stiffness when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said first stiffness.

In some embodiments, the first shape configuration may be such that, in the first position, the first elastic body is tensioned in a first elastic deformation state, which allows the first elastic body, when a pressure is applied on the suspension device, present the first stiffness. Said first deformation state may exist in the absence of any pressure applied to the device by an operator and be amplified when said pressure is applied.

In some embodiments, the movable body may be configured such that the first shape configuration is a first compression configuration of the first elastic body in the approach direction of the upper section and the lower section relative to each other. .

In some embodiments, the second shape configuration may be such that, in the second position, the first elastic body exhibits a second stiffness when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said second stiffness.

In some embodiments, the second shape configuration may be such that, in the second position, the first elastic body is tensioned in a second state of elastic deformation, which allows the first elastic body, when a pressure is applied on the suspension device, present the second stiffness. Said second deformation state may exist in the absence of any pressure applied to the device by an operator and be amplified when said pressure is applied.

In some embodiments, the movable body may be configured such that the second shape configuration is a second compression configuration of the first elastic body in the approach direction of the upper section and the lower section relative to each other. .

In some embodiments, the passage from one shape configuration to another can be performed by buckling (blending) the first elastic body caused by the moving element moving from one position to another.

In some embodiments, the mobile element may consist of a basic body mounted mobile on the suspension device; and of an elastic tongue, as the first elastic body, which has a first end through which this tongue is attached to said basic body, and a second end that is free to move away and approach the basic body by flexing the first end (which therefore plays the role of point of

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flexion for the tongue) and which is configured to cooperate with the suspension device such that the tongue makes an elastic coupling between the upper section and the Lower section, when a pressure is applied on the suspension device. In these ways, when the movable element moves between its first position and its second position, the position of the first end of the tongue is shifted in such a way that the flexural capacity of the tongue varies with respect to the basic body and, therefore, that the stiffness of the return force that the tongue opposes relative displacement of the upper section with respect to the Lower section varies, between its values R1 and R2, when a pressure is applied on the suspension device.

In some embodiments, the first elastic body may be able to adopt a first flex configuration, when the mobile element occupies its first position, and a second flex configuration (different from the first), when the mobile element occupies its second position, in such a way that it causes the resistance that opposes the first elastic body in its flexion to vary and, consequently, that it causes the stiffness of the return force that opposes the first elastic body to vary between its R1 and R2 values to the relative displacement of the upper section with respect to the lower section, when a pressure is applied on the suspension device.

In some embodiments, the mobile element may consist of a flexible sheet, as the first elastic body, capable of being disposed between the lower section and the upper section, respectively in the first flexural configuration, when the mobile element occupies its first position, and in the second flexion configuration (different from the first), when the movable element occupies its second position, so that it causes the resistance that opposes the flexible sheet in its flexion to vary and, consequently, to cause it to vary, between its values R1 and R2, the stiffness of the return force that opposes this sheet to the relative displacement of the upper section with respect to the lower section, when a pressure is applied on the suspension device.

In some embodiments, the first elastic body may be configured to elastically deform in at least one transverse plane parallel to the direction of separation of the upper section and the lower section relative to each other when the mobile element of a position to another.

In some embodiments, this separation direction may correspond to a direction perpendicular to the plate of the upper section such that the transverse plane may correspond to a plane perpendicular to this plate.

In some embodiments, the suspension device may comprise a plane of symmetry and be configured such that the transverse plane is, at choice, parallel or perpendicular to the plane of symmetry.

In some embodiments, the suspension device may be such that the upper section consists of at least one housing (for example two housings) for receiving the end of a slat in an insertion direction.

In some embodiments, the suspension device may be such that the transverse plane is, at choice, parallel or perpendicular to this direction of Insertion.

In some embodiments, the suspension device may be such that the suspension means comprise at least two suspension elements separated in a longitudinal direction of the device, and the transverse plane may be perpendicular to this longitudinal direction.

In some embodiments, the first axis of rotation may be, at choice, parallel or perpendicular to the plane of the plate (eg, at choice, perpendicular or parallel to the direction of separation of the upper section and the Lower section) .

In some embodiments, the first axis of rotation can be, per election, perpendicular or parallel to said transverse plane.

In some embodiments, the first axis of rotation may be separated from the upper section, in particular in the direction of separation of the upper section and the lower section.

According to the invention, the first axis of rotation is integral with the lower section.

In some embodiments, the first elastic body may be disposed between the first axis of rotation and the upper section.

In some embodiments, the first shape configuration can be obtained by tensioning the first elastic body in a first elastic deformation state between the first axis of rotation and the upper section.

In some embodiments, the second shape configuration can be obtained by tensioning the first elastic body in a second elastic deformation state between the first axis of rotation and the upper section.

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In some embodiments, the mobile element may comprise a first basic body that is in solidarity with the first axis of rotation.

In some embodiments, the first basic body may be formed in one piece with the first axis of rotation. In this case, the pivoting of the mobile element around the first axis of rotation can be performed by elasticity of the mobile element, for example by arranging the first axis of rotation and the first basic body in a joint (in particular a hinge) made of a single piece.

In some embodiments, the first base body may be loose from the first axis of rotation and be configured to be mounted on this axis. In this case, the first base body may comprise a clamp portion configured to support the first axis of rotation with the first basic body by pressure fixing effect.

In some embodiments, the first axis of rotation may be formed in one piece with the Lower section.

In some embodiments, the first basic body may be attached to a lower portion of the first elastic body.

In some embodiments, the movable element may be provided with at least a second elastic body that is capable of performing an elastic coupling between the upper section and the lower section with an associated stiffness, when a pressure is applied on the suspension device while the mobile element occupies its first position, and it is not capable of performing said elastic coupling with said associated stiffness, when the mobile element adopts the second position.

It is understood that, in the first position, the second elastic body has an associated stiffness (different or equal to said first stiffness of the first elastic body) when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said associated stiffness.

In some embodiments, the second elastic body is integral in displacement with the first elastic body when the mobile element is carried from one position to another. In this case, the configuration change of the first elastic body can be taken advantage of, during the passage of the mobile element from one position to another, to allow the second elastic body to move through this first elastic body between two different configurations to make vary the rigidity of the suspension device as a whole.

In some embodiments, the movable element may be configured so that, in the first position, the second elastic body performs the elastic coupling between the upper section and the first axis of rotation with the associated stiffness, when a pressure is applied on the suspension device

In some embodiments, the first basic body may be able to cooperate with the second elastic body to perform the elastic coupling between the upper section and the first axis of rotation with the associated stiffness, when a pressure is applied on the suspension device while the mobile element occupies its first position.

In some embodiments, the first basic body can be, by choice, rigid or have a certain flexibility, so that it actively participates in the elastic coupling between the upper section and the first axis of rotation.

In some embodiments, the movable element may be configured so that, in the second position, the second elastic body does not make any elastic coupling between the upper section and the lower section.

In some embodiments, the movable element may be able to pivot with respect to the suspension device around a second axis of rotation.

In some embodiments, the movable element can be carried from one position to another at least by rotation of the movable element around the first and second axes of rotation.

In some embodiments, the characteristics of the suspension device relative to this second axis of rotation may be similar to those related to the first axis of rotation, so that its description will be omitted for the sake of conciseness, and even its possible incorporation by the second axis of rotation it is an integral part of this description.

In some embodiments, the first and second axis of rotation may be parallel to each other.

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separation of the upper section and the lower section.

In some embodiments, the second axis of rotation may be integral with the upper section.

In some embodiments, the movable element may comprise a second basic body that is integral with the second axis of rotation.

In some embodiments, this second basic body may be attached to an upper portion of the first elastic body.

In some embodiments, the mobile element may be formed in one piece.

In some embodiments, the movable element may be slidably mounted with respect to the suspension device in a sliding direction.

In some embodiments, the mobile element can be brought from one position to another at least by rotating the mobile element around the first axis of rotation and by sliding the mobile element in the direction of sliding.

In some embodiments, the mobile element may comprise a sliding part that is integral with the upper section and is capable of moving in the sliding direction when the mobile element is carried from one position to another.

In some embodiments, the suspension device may be such that the mobile element has a third position, different from the first position and the second position, in which the first body has a third stiffness, different from the first stiffness and of the second stiffness, when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said third stiffness.

Thus, in this third position, when a pressure is applied on the suspension device, the first elastic body can adopt a third configuration, different from the first configuration, capable of elastically deforming to exert a return force with a third stiffness R3, different from the first stiffness R1 and the second stiffness R2, and performing an elastic coupling between the upper section and the lower section with said third stiffness R3.

In particular, three different rigidities R1, R2 and R3 can be advantageously achieved with a single first elastic body, simply by differently arranging this first elastic body with respect to the suspension device, by means of the clearance of the movement of the mobile element between its different positions. Therefore, the mobile element allows to modulate the rigidity of the suspension device according to three positions, rigid, flexible and semi-flexible.

Furthermore, this third stiffness R3 can be advantageously achieved by extension and by analogy with the means used in the embodiments detailed above to obtain the second stiffness R2.

In some embodiments, the suspension device may be such that, in the second position, the first elastic body does not make any elastic coupling between the upper section and the lower section, when a pressure is applied on the suspension device.

It is understood that, in these embodiments, the device may consist of:

• an upper section provided with a plate capable of supporting a mattress;

• a lower section comprising means that allow the fixing of the suspension device to the bed base, said lower section being connected to the upper section by means of suspension means;

• means for modifying the rigidity of the suspension device consisting of a mobile element,

said movable element may be provided with at least a first elastic body (for example, a first elastic body of the type described above), and have:

a first position in which the first elastic body makes an elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device; and a second position, other than the first position, in which the first elastic body does not make an elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device.

In particular, the suspension device may be such that, in the second position, when a pressure is applied on the suspension device, the first elastic body is not requested.

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Thus, in this second position, when a pressure is applied on the suspension device, the first elastic body may be in a state of rest in which it does not deform elastically, such that it is not capable of exerting a force return and make an elastic coupling between the upper section and the lower section. In other words, in the second position, the first elastic body opposes a second zero stiffness R2 to the displacement of the upper section and the lower section relative to each other, when a pressure is applied on the suspension device.

On the other hand, the suspension device can therefore be such that, in this second position, the suspension means and the first elastic body are not able to engage in parallel, when a pressure is applied on the suspension device. Therefore, the suspension stiffness Rs can only be opposed to the displacement of the upper section and the lower section relative to each other, when a pressure is applied on the suspension device.

In some embodiments, the movable element may have a third position, different from the first position and the second position, in which the first elastic body has a second stiffness, different from the first stiffness, when a pressure is applied on the suspension device, such that an elastic coupling is made between the upper section and the lower section with said second stiffness.

In this way, the mobile element allows modulating the rigidity of the suspension device according to three positions, rigid, flexible and semi-flexible. In addition, this third position can be obtained advantageously by applying characteristics similar to those described above for the embodiments in which the second position of the movable element allows the first elastic body to be elastically deformed to present a stiffness. zero, when a pressure is applied on the suspension device.

In some embodiments, the movable element may also consist of a second elastic body, and the suspension device may be such that, in the second position, the second elastic body presents, when a pressure is applied on the device of suspension, a second stiffness different from the first stiffness presented by the first elastic body in the first position, such that an elastic coupling is made between the upper section and the lower section with said second stiffness.

In some embodiments, this second elastic body may be separated and integral in displacement with the first elastic body.

In some embodiments, the second elastic body may have a different stiffness from that of the first elastic body, and, in the second position, the second elastic body may make an elastic coupling between the upper section and the lower section when a pressure on the suspension device.

Thus, in the second position, the elastic coupling between the upper section and the lower section can be carried out by the second elastic body and not by the first elastic body. Therefore, in the second position, the suspension means can be advantageously coupled in parallel with the second elastic body in at least a part of the travel path of the upper section with respect to the lower section, when a pressure on the suspension device.

Preferably, the stiffness of the second elastic body is greater (or less) than that of the first elastic body. For this, it may be provided, for example, that the second elastic body has a thickness greater (or less) than that of the first elastic body. In an alternative embodiment, materials having different stiffnesses may be chosen.

Accordingly, it is understood that, in the second position, the suspension device has a higher (or less) stiffness than it does when the movable element is in the first position.

In some embodiments, the mobile element may also consist of a third elastic body, and also have a third position in which the third elastic body presents, when a pressure is applied on the suspension device, a third stiffness different from the first and second stiffness of the first and second elastic body respectively in the first and second positions, such that an elastic coupling is made between the upper section and the lower section with said third stiffness.

In some embodiments, the mobile element may also consist of a third elastic body that has a different stiffness from those of the first and second elastic body, and the mobile element may also have a third position in which the Third elastic body makes an elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device.

Thus, in this third position, the suspension means can be advantageously coupled in parallel with the third elastic body on at least a part of the travel path of the upper section with respect to the lower section, when a pressure on the suspension device.

Preferably, but not exclusively, the third elastic body has a stiffness superior to that of the first and

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Second elastic body. As a consequence, in the third position, the suspension device has a stiffness superior to that which it presents when the mobile element is in the first position or in the second position.

In this way, the mobile element can allow the rigidity of the suspension device to be modulated in three positions, rigid, flexible and semi-flexible.

In some embodiments, the suspension device may be such that, in the second position, the movable element does not make any elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device. It may be an "uncoupled" position. Therefore, the rigidity of the suspension device is not modified by the mobile element. In other words, in this second position, the suspension means are decoupled from the moving element.

In some embodiments, the movable element may also consist of a second elastic body and also have a third position in which the second elastic body presents, when a pressure is applied on the suspension device, a second stiffness different from the first stiffness of the first elastic body in the first position, such that an elastic coupling is made between the upper section and the lower section with the second stiffness.

In some embodiments, the mobile element may also comprise a second elastic body that has a different stiffness from that of the first elastic body, and the mobile element may also have a third position in which the second elastic body It makes an elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device.

Here too, the stiffness of the second elastic body may be higher or lower than that of the first elastic body such that it modulates the rigidity of the suspension device. The different rigidities can be obtained by selecting different materials or different thicknesses of the same material.

Thus, in these embodiments, there can therefore be an uncoupled position and one or two positions for which the rigidity of the suspension device is increased.

In some embodiments, the first elastic body may have at least one contact part which, when a pressure is applied on the suspension device while the mobile element adopts its first position, is able to cooperate with said suspension device to cause an elastic deformation of the first elastic body with the first stiffness, and when the mobile element is carried from one position to another, said contact part can be moved in at least one direction parallel to the plate.

Thus, the displacement of this contact part comprises at least one displacement component in said at least one direction parallel to the plate (in particular, a horizontal direction, when the suspension device is fixed to the bed base, under normal conditions of use).

In some embodiments, the suspension device comprises a support on which said contact part can be supported, when a pressure is applied on the suspension device.

In some embodiments, this support can be fixed to (for example, formed in one piece with), to choose, the lower section or the upper section of the suspension device.

In some embodiments, the support can be rigid or flexible. In particular, the support may have the shape of an arc that extends in a longitudinal direction of the suspension device.

In some embodiments, the support can be extended between the means that allow fixing the suspension device to the bed base, and can, for example, be arranged such that the upper part of the arch is directed towards the upper section.

Alternatively, in some embodiments, the support may protrude under the upper section so that the upper part of the arch is directed towards the lower section.

In some embodiments, the device may comprise secondary suspension means (preferably different from the suspension means described above which serve as the main suspension means) disposed between the support (in particular formed in the prolongation of the upper part of the arch) and the upper section or the lower section, depending on the embodiments implemented, so that it is elastically deformed when a pressure is applied on the suspension device.

In some embodiments, these secondary suspension means have at least one folding line that is parallel, to be chosen, to the transverse direction or the longitudinal direction of the suspension device.

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suspension, such that said mobile element is carried from one position to another by a rotational movement of the mobile element.

Said assembly allows obtaining a compact suspension device and which also allows the mobile element to be deflected.

In some embodiments, the movable element may be able to pivot about an axis parallel to the plate, for example an axis that extends in the longitudinal direction of the suspension device (in particular, an orthogonal direction to a plane of symmetry of the suspension device, when the latter consists of said plane of symmetry).

In some embodiments, the movable element may have the general shape of a wheel rotatably fixed to the upper section. However, the wheel could be rotatably fixed to the lower section without leaving the frame of the present invention.

Advantageously, the wheel is rotatably mounted about an axis parallel to the plate. Preferably, the shaft extends in the longitudinal direction of the suspension device. For example, the axis of the wheel can be orthogonal to a plane of symmetry of the suspension device, when the latter consists of said plane of symmetry.

It is understood, therefore, that the wheel is rotated to change the position of the moving element.

In some embodiments, the wheel comprises a tire and the elastic body (s) are formed by one or more tire portions, and said tire portions can be supported on a support fixed to the lower section when a pressure is applied on the device of suspension, for example a support of the type described above. It is understood, therefore, that the rim or portions have a radial elasticity in order to make the elastic coupling between the upper section and the lower section.

In some embodiments, the wheel may consist of a first tire portion and a second tire portion, the first tire portion having a radial thickness greater than that of the second tire portion, as a result of which the first portion of tire has a stiffness superior to that of the second

Tire portion

In some embodiments, the tire may also have an angular cavity.

In a first position of the movable element, the first tire portion may be located between the support and the plate, such that the first tire portion makes an elastic coupling between the upper section and the lower section when a pressure is applied on The suspension device. In this first position, the suspension device can have great rigidity, when the suspension means and the first tire portion are coupled.

In the second position of the movable element, the cavity can be located between the support and the plate, such that there is no elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device. The cavity allows, therefore, to perform the "decoupled" position. It is, therefore, the position in which the suspension device has the greatest flexibility.

In the third position of the movable element, the second tire portion may be located between the support and the plate, such that the second tire portion makes an elastic coupling between the upper section and the lower section when a pressure is applied on The suspension device. When the second tire portion has a stiffness less than that of the first tire portion, it is understood that, in this third position, the suspension device has a less important rigidity than in the first position.

In order to improve the stability of the suspension device, the latter can also consist of two suspension elements arranged on both sides of the wheel, elastically joining said suspension elements to the support with the upper section.

In some embodiments, each rim portion may consist of an axial groove within which the support is housed when a pressure is applied on the suspension device, which allows the movable element to be locked in the selected position.

In some embodiments, the wheel may consist of at least one stop that cooperates with the plate and / or the support such that the rotational range of the moving element is limited.

In some embodiments, the wheel may consist of visible marks that are diametrically opposed to the tire portions that constitute the elastic bodies.

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In some embodiments, at least one of the rim portions may comprise a rib that extends along the circumference of the wheel on both sides of the axial grooves such that rotation of the moving element is prevented while apply a pressure to the suspension device.

In some embodiments, the movable element may be able to pivot about an axis perpendicular to the plate.

In some embodiments, the movable element may be rotatably mounted around an axis perpendicular to the plate, and the elastic body (s) may be formed by a multitude of leaf springs extending in a direction perpendicular to the plate, being said leaf springs capable of resting on the support fixed to the Lower section when a pressure is applied on the suspension device.

Therefore, the rotation of the wheel allows the rigidity of the suspension device to be modified by changing the position of the moving element. The leaf springs can have different stiffnesses. As a consequence, the rigidity of the suspension device may depend on the stiffness of the leaf springs that rest on the support. Preferably, the leaf springs have different thicknesses such that they have different stiffnesses.

Advantageously, the first elastic body is formed by two leaf springs, preferably corrugated, which extend from the periphery of a disk fixed at a lower end of the movable element, the two leaf springs being diametrically opposed.

Preferably, the second elastic body is also formed by two diametrically opposed leaf springs, the thickness of which is different from the leaf springs of the first elastic body, which also extend from the periphery of the disk.

In some embodiments, the mobile element is slidably mounted in a transverse direction of the suspension device, such that the mobile element is carried from one position to another by a translational movement.

Advantageously, the elastic body (s) are formed by one or more elastic sheets that can be supported on a support, preferably in the form of an arc, fixed to the lower section. Elastic sheets have different stiffnesses. To do this, they have different thicknesses.

In some embodiments, the plate can advantageously consist of an opening that extends in an orthogonal direction to the plate, and a part of the movable element can pass through said opening so that it can be operated by an operator. In some of the aforementioned embodiments, the wheel can protrude slightly through the opening so that the operator can see the marks and comfortably operate the moving element.

In some embodiments, the movable element may comprise an actuation portion and the plate consists of an opening by means of which the actuation portion protrudes at least in part from the plate so that it can be operated by an operator.

In some embodiments, the movable element may be mounted either in the lower section, or in the upper section of the suspension device.

In some embodiments, the suspension means may be formed by two arched walls extending between the lower section and the upper section, each of the arched walls consisting of one end fixed to the lower section and another end fixed to the upper section. The mobile element is preferably arranged between the two arched walls.

It should be added that the suspension device according to the invention is preferably, but not exclusively, a bed base slat, usually intended to be fixed on the long side of the bed base. For this, the plate is provided with at least two louver housings. Preferably, the mobile element is arranged between the two louver housings.

According to a variant, the plate has no louver housing and only has the function of mattress support.

Brief description of the drawings

The invention will be better understood and its advantages will be better shown by reading the following description of some embodiments, indicated by way of non-limiting examples. The description refers to the attached drawings, in which:

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Figure 1 is a front view of a first embodiment of the suspension device outside the scope of the invention in which the movable element is a wheel mounted swivel around an axis parallel to the plate, and in which the plate It consists of two accommodation for slats;

Figure 2 is a top view of the suspension device of Figure 1, the movable element being in its third position;

Figures 3A to 3C represent, in a sectional side view, the suspension device of Figure 1 in

its three positions, the 3D figure showing the deformation of the device when a pressure is applied;

Figure 4 is a perspective view of the suspension device of Figure 1;

Figure 5 is a perspective view of the movable element of the suspension device of Figure 1;

Figure 6 is a front view of a first variant of the suspension device of Figure 1, in which

the plate lacks housing for slats;

Figure 7 is a front view of a second embodiment of the suspension device outside the scope of the invention in which the movable element is rotatably mounted around an axis orthogonal to the

license plate;

Figure 8 is a sectional side view of the suspension device of Figure 7; Figure 9 is a perspective view of the suspension device of Figure 7;

Figure 10 is a perspective view of the suspension device of Figure 7 showing the disk of the mobile element carrying the leaf springs;

Figure 11 is a perspective view of the movable element of the suspension device of Figure 7 having two elastic bodies composed of two pairs of leaf springs;

Figure 12 is a variant of the mobile element of Figure 11, in which the mobile element has three elastic bodies composed of three pairs of leaf springs;

Figure 13 is a front view of a third embodiment of the suspension device outside the scope of the invention in which the movable element is a sliding drawer in the transverse direction of the suspension device;

Figure 14 is a sectional side view of the suspension device of Figure 13;

Figure 15 is a perspective view of the suspension device of Figure 13 showing the surface

top of the plate and the cursor of the mobile element;

Figure 16 is a perspective view of the suspension device of Figure 13 showing the first, second and third elastic body of the movable element; Y

Figures 17A and 17B are perspective views of the movable element of the suspension device of Figure 13;

Figure 18 is a front view of a second variant of the suspension device of Figure 1; Figure 19 is a sectional side view of the suspension device of Figure 18; Figure 20 is a perspective view of the suspension device of Figure 18; Figure 21 is a perspective view of a third variant of the suspension device of Figure 1; Figure 22 is a substantially sectional side view of the suspension device of Figure 21; Figure 23 is a perspective view of a fourth variant of the suspension device of Figure 1; Figure 24 is a front view of the suspension device of Figure 23;

Figures 25A, 25B and 25C are sectional side views of the suspension device of Figure 23, showing the movable element respectively in three different positions;

Figure 26 is a perspective view of a fifth variant of the suspension device of Figure 1; Figure 27 is a front view of the suspension device of Figure 26;

Figures 28A, 28B and 28C are sectional side views of the suspension device of Figure 26, showing the movable element respectively in three different positions;

Figures 29 and 30 are perspective views of a fourth embodiment of a suspension device according to the present invention;

Figure 31 is a front view of the suspension device of Figure 29;

Figure 32 is a view of a first sectional side of the suspension device of Figure 29;

Figures 33A, 33B and 33C are views of the side opposite said first side of the suspension device

of Figure 29, showing the mobile element respectively in three different positions;

Figure 34 is a perspective view of a first variant of the suspension device of Figure 29;

Figure 35 is a front view of the suspension device of Figure 34;

Figures 36A and 36B are sectional side views of the suspension device of Figure 34, showing the movable element respectively in two different positions;

Figure 37 is a front view of a second variant of the suspension device of Figure 29; Figure 38 is a perspective view of the device of Figure 37;

Figure 39 is a sectional view of the device of Figure 37;

Figures 40 to 42 are similar views respectively to Figures 37 to 39, with the moving element occupying another position;

Figures 43 and 44 are partial and perspective sectional views of a third variant of the suspension device of Figure 29.

Detailed description of the invention

Next, various embodiments of the suspension device with adjustable stiffness will be described.

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according to the invention. As mentioned earlier, the suspension device can be a slatted bed or a suspension system that supports a mattress. Without leaving the framework of the present invention, the suspension device could also be mounted on a sofa or armchair base.

By means of Figures 1 to 5, a first embodiment of the suspension device will be described outside the scope of the invention.

Figure 1 shows a suspension device 10 which is preferably made of a flexible elastomeric plastic material.

This type of suspension 10 has an upper section 12 provided with a plate 14 consisting of two housings 16, 18 for receiving the end of two slats (not shown here) in an insertion direction that carries the reference D. These two slats are parallel and extend in a plane, called rest plane.

The plate 14 is intended to receive a lateral portion of a mattress, it being understood that the central portion of the mattress is supported by the slats.

Next, the longitudinal direction of the suspension device will be called the DL direction which is orthogonal to the plane of symmetry P of the suspension device, it being specified that this plane of symmetry is parallel to the longitudinal direction of the slats and orthogonal to the plate 14.

In addition, the direction DT of the suspension device which is orthogonal to said address DL and parallel to the direction D of insertion of the slats will be called "transverse direction". The thickness of the suspension device is considered in this transverse direction.

For fixing to the bed base, the suspension device 10 consists, in its Lower section 20, of anchors 22 in the form of a sleeve that are intended to cooperate with pins fixed on a long side of the bed base.

It is also noted that the suspension device 10 of this example consists, in its lower section 20, of an additional housing 24 for receiving a lower slat.

The upper section 12 and the lower section 20 are joined together by an intermediate section 26 consisting of suspension means 28. In this example, the suspension means 28 are formed by two flexible arcuate walls 30 in the form of "C" which open inside the suspension device and which can be folded by the folding lines 30a parallel to the transverse direction of the suspension device 10.

Each of these arched walls 30 has a first end 30 ’attached to the anchoring means 22 and a second end 30”, opposite the first end 30 ’, attached to the upper section 30”.

It is understood, therefore, that when a pressure is applied to the suspension device, in particular when a pressure is applied on the slats, perpendicularly with respect to the rest plane, the arched walls 30 fold down their folding lines 30a, presenting a spring effect. The upper section 12 is therefore close to the lower section 20 when a pressure is applied on the plate of the suspension device 10.

In this example, the suspension device 10 also comprises means 32 for modifying the stiffness of said device, said means consisting of a mobile element 34. In this first embodiment, the mobile element has the general shape of a wheel which is rotatably fixed to the upper section 12. More precisely, the wheel 34 is rotatably mounted about an axis 36 parallel to the plate. For this, the wheel 34 is advantageously fixed under pressure on the axle 36.

As can be seen in Figure 1, the axis 36 extends in the longitudinal direction DL of the suspension device 10. Moreover, this axis 36 is disposed below the plate 14, between the two housings 16, 18. In this way, the wheel has a plane of symmetry that substantially coincides with the plane of symmetry P of the suspension device 10.

The wheel 34 is advantageously made of a flexible material, for example an elastomer.

Referring again to Figure 1, it is found that the suspension device 10 further comprises an arc-shaped support 38 comprising a support portion 40 that is attached to the anchoring means 22 of the lower section 20 by middle of flexible arms 42. Preferably, this support 38 is flexible.

In addition, the suspension device 10 consists of two suspension elements 44 (as secondary suspension means) arranged on both sides of the wheel 34. These suspension elements, which are represented in the form of "C" shaped arched walls. , they connect the support 38 with the upper section 12. These suspension elements that allow to improve the stability of the suspension device, are however optional. Further,

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In this example, these "C" shaped arched walls open into the suspension device and can be folded along the fold lines parallel to the transverse direction.

By means of Figure 3, the wheel 34 will be described in more detail below. As mentioned above, the wheel 34 is made of a flexible material. The wheel 34 consists of a hub 46 fixed to the axle 36, and a tire 48 connected to the hub 46 by means of spokes 50.

The rim 48 is composed of several rim portions, this is a first rim portion 52 that constitutes a first elastic body that has a first stiffness, and a second rim portion 54 that constitutes a second elastic body that has a second lower stiffness at first stiffness. Each of the two tire portions can be deformed and has a radial elasticity.

The second tire portion 54 extends angularly between the arms 50a and 50b, while the first tire portion 52 extends angularly between the arms 50b and 50c. The angular distance between the arms 50a and 50b of the second tire portion 54 is greater than that between the arms 50b and 50c of the first tire portion 52, whereby the first stiffness of the first tire portion is greater than the second stiffness of the second tire portion. It is understood that these rigidities are considered in a radial direction. The radial thickness of the first rim portion can also be increased in order to further increase its first stiffness.

The first and second rim portions also comprise an axial groove 52a and 54a whose function will be explained later.

The tire 34 further comprises a third tire portion 58 that extends angularly by approximately 180 °, as well as an angular cavity 56 defined between the first tire portion 52 and the third tire portion 58.

As seen in Figures 2 and 4, the plate 14 consists of an opening 60 which preferably extends in an orthogonal direction to the plate. This opening 60 extends between the two slat housings 16, 18 and ends on both sides of the upper section 12. A part of the wheel 34 passes through the opening 60 so that an operator can easily operate the wheel, ie make that it rotates around axis 36, from the top face of the plate.

Several marks are engraved on the third rim portion 58, this is a "1" diametrically opposed to the angular cavity, a "3" diametrically opposite the first rim portion 52, and a "2" diametrically opposite the second portion of tire 54. Two arrows are also engraved on the third portion of the tire so as to indicate to the operator in what direction wheel 34 should turn.

These marks are visible to the operator and allow him to easily regulate the rigidity of the suspension device

driving wheel 34.

In addition, preferably, the tire portions 52, 54 comprise a rib 55 that extends along the circumference of the wheel on both sides of the axial grooves such that rotation of the moving element is avoided while applying a pressure to the suspension device.

It will be explained in more detail below how the stiffness regulation of the device works

suspension 10.

In a first position, shown in Figure 3A, the first elastic body formed by the first tire portion 52 is disposed in front of the support portion 40 such that the first elastic body makes an elastic coupling between the upper section 12 and the lower section 20 when a pressure is applied on the suspension device. The support portion 40 of the support 38 is housed within the groove 52a made in the first rim portion 52 when a pressure is applied on the suspension device 10, as a result of which the first elastic body 52 rests on the portion of support of the support 38. From this it follows that the first elastic body 52 deforms elastically while resting on the flexible support 38 which in turn deforms. As a result, the first elastic body acts in series with the flexible support 38, the latter acting in parallel with the suspension means 30. It is also understood that the cooperation between the support portion 40 and the groove 52a makes it possible to prevent the mobile element 34 change position accidentally.

Preferably, but not necessarily, in the rest position (without pressure applied on the suspension device), a clearance H of approximately one millimeter is provided between the support portion 40 and the first tire portion 52, and for the purpose to facilitate the manipulation of the mobile element.

Thus, in this first position, which corresponds to the "3" mark, the suspension device 10 has great rigidity.

In a second position, shown in Figure 3B, the angular cavity 56 is disposed in front of the portion of

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support 40. As a result, when a pressure is applied on the suspension device 10, the wheel rim 34 never comes into contact with the support portion 40. It follows that, in this position, which corresponds to the mark "1", the mobile element does not make an elastic coupling between the upper section 12 and the lower section 20. It is an uncoupled position in which the mobile element does not modify the intrinsic rigidity of the suspension device.

In a third position, represented in FIG. 3C, the second elastic body 54 composed of the second tire portion is disposed in front of the support portion 40 such that the second elastic body 54 makes an elastic coupling between the upper section 12 and the lower section 20 when a pressure is applied on the suspension device. The support portion 40 of the support 38 is housed within the groove 54a made in the second rim portion 54 when a pressure is applied on the suspension device 10, as a result of which the second elastic body 54 rests on the portion of support of the flexible support 38. From this it follows that the second elastic body 52 elastically deforms and acts in series on the flexible support 38 which in turn deforms, as shown in Figure 3D. It is also understood that the second elastic body 42 and the flexible support 38 act in parallel with the suspension means 30. On the other hand, the cooperation between the support portion 40 and the groove 54a makes it possible to prevent the movable element 34 from changing position accidentally.

Preferably, in the rest position (without pressure applied to the suspension device), a clearance H of approximately one millimeter between the support portion 40 and the second tire portion 54 is also preferably provided, and in order to facilitate the manipulation of the mobile element.

Thus, in this first position, which corresponds to the "2" mark, the suspension device 10 has a medium stiffness.

The mobile element 34 can thus adopt three different positions corresponding to different rigidity of the suspension device 10.

The overall firmness of the suspension device 10 therefore depends on the local deformability of the

mobile element 34.

Referring to FIGS. 3A to 3D and 5, it is found that the wheel 34 further comprises a first stop 62 disposed at one end of the first rim portion 52, and a second stop 64 disposed at one end of the third rim portion 58 facing the first rim portion 52. The first and second stop 62, 64 allow restricting the amplitude of rotation of the wheel 34 such that the third rim portion 58 cannot be placed in front to the support portion 40. To this end, the first stop is provided to abut the support portion as shown in Figure 3A, while the second stop 64 is provided to abut the plate 14, as It can be seen in Figure 3B.

By means of Figure 6, a first variant of the first embodiment described above will be described below.

In this figure 6, a suspension device 10 ’is shown consisting of a wheel 34’ similar to the wheel 34 described above. The suspension device 10 ’differs from the previous one in that the plate 14 ′ of the upper section 12’ does not consist of louver housing. In addition, the lower section 20 'consists of means for allowing the device to be fixed to a bed base, these means comprising a mounting platform.

By means of Figures 18 to 20, a second variant of the first embodiment described above will be described below.

In this second variant, the suspension device 10B differs from the suspension device 10 described above in that the arc-shaped support 38B comprises a support portion 40B that is attached to the upper section 12B by means of flexible arms. Preferably, this support 38B is flexible. In this variant, the upper part of the arc is directed towards the lower section 20B.

In addition, the suspension device 10B consists of two suspension elements 44B (as secondary suspension means) arranged on both sides of the wheel 34B. These suspension elements, which are presented in the form of "C" shaped arched walls, allow the support 38B to rest on the lower section 20B, when a pressure is applied on the suspension device.

In particular, the secondary suspension means comprise a contact part 46B (which, in this example joins the two suspension elements 44B together) that can be supported on the lower section 20B, when a pressure is applied on the suspension device .

In this example, this contact part 46B can extend over the additional housing 24B so that it can rest on the additional lower blade, when said blade is housed within this

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accommodation 24B.

When no lower plank is housed inside the housing 24B, a wedge 80B, separated from the suspension device, can be advantageously mounted inside the housing 24B (for example by pressing it under pressure) to allow the contact part 46B to rest on the wedge 80B in the absence of the thickness of this lower slat.

To reduce the noise when the contact part 46B comes into contact with the wedge 80B, the latter may be advantageously made of a material that absorbs impacts, such as a rubber or elastomer material, by

SBS example.

On the other hand, in this example, the "C" shaped arched walls open into the suspension device and can be folded along the folding lines parallel to the transverse direction.

By means of Figures 21 and 22, a third variant of the first embodiment described above will be described below.

In this third variant, the suspension device 10C differs from the suspension device 10 described above in that the secondary suspension means have at least one fold line parallel to the longitudinal direction (and, therefore, perpendicular to the transverse direction DT).

In particular, the suspension device 10C comprises a support 38C comprising a support portion 40C that is attached to the lower section 20C by means of arms capable of folding along the folding lines parallel to the longitudinal direction.

In addition, the suspension device 10C consists of two suspension elements 44C (as secondary suspension means) arranged on both sides of the wheel. These suspension elements, which are presented in the form of "C" shaped arched walls, join the support 38C with the upper section 12C. In addition, in this example, these "C" shaped arched walls open in the transverse direction and can be folded along the fold lines parallel to the transverse direction.

By means of Figures 23 to 25C, a fourth variant of the first embodiment described above will be described below.

In this fourth variant, the suspension device 310 differs from the suspension device 10 described above in that the mobile element 332 is structured differently.

In particular, according to this variant, the mobile element 332 consists of a basic body 334 mounted mobile on the suspension device.

In this example, this basic body 334 has a wheel portion shape, in particular of a wheel substantially similar to that described above for the suspension device 10.

This basic body 334 is rotatably mounted around an axis 336 parallel to the plate, as described above for the suspension device 10.

On the other hand, in this example, the mobile element 332 further comprises an elastic tongue 338, as the first elastic body, which has a first end 338A by which this tongue 338 is attached to said basic body 334, and a second end 338B which is free to move away and approach the basic body 334 by flexing the first end 338A and which is configured to cooperate with the suspension device such that the tongue 338 makes an elastic coupling between the upper section 312 and the section lower 320, when a pressure is applied on the suspension device.

More particularly, in this example, when the movable element 332 moves between two particular positions, the position of the first end 338A of the tongue 338 is shifted in such a way that the flexural capacity of the tongue varies with respect to the basic body 334 and, therefore, varying the stiffness of the return force that opposes the tongue to the approach of the upper section 312 with respect to the lower section 320, when a pressure is applied on the suspension device.

In particular, in this example, the second end 338B of the tongue 338 is able to rest on a support portion 340 of the suspension device. For example, this support portion 340 may be attached to the lower section 320 by means of flexible arms, in particular in a manner similar to that described for the third variant described above.

More particularly, in this example, the second end 338B is able to cooperate with the suspension device (in particular with the support portion 340) at two different points from each other, depending on the position

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which occupies the mobile element 332. This results in that the displacement capacity of the elastic tongue 338 varies when the mobile element 332 moves, for example between the two positions illustrated in Figures 25B and 25C.

In particular, the displacement capacity of the tongue 338, in an approach direction (in particular the DV address illustrated in Figures 25A to 25C) of the upper section 312 with respect to the lower section 320, may depend on the relative positions, in this approach direction, of the flexion point of the tongue 338 (eg its first end 338A) and its free end (eg its second end 338B). Thus, in the case of the position occupied by the mobile element 332, these relative positions may be further away (with a distance AI1 in Figure 25B) to allow greater displacement capacity and oppose a lower stiffness, or by the On the contrary, they are closer (with a distance AI2 in Figure 25C, which is smaller than AI1) to reduce displacement capacity and oppose greater rigidity.

On the other hand, as illustrated in Figure 25A, the movable element is also capable of occupying another position in which the elastic tongue 338 does not make any elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device In particular, the second end 338B is not able to cooperate with the suspension device 310 such that an elastic deformation of the tongue 338 is not requested, when a pressure is applied on the latter.

By means of Figures 26 to 28C, a fifth variant of the first embodiment described above will be described below.

In this fifth variant, the suspension device 410 differs from the suspension device 10 described above in that the mobile element 432 is structured differently.

In particular, according to this variant, the mobile element 432 is capable of pivoting on the suspension device 410 not by means of an axis or pivot, but on the contrary by means of guiding elements 420A and 420B, more discrete, which have at least partially circular peripheral surfaces and configured to guide the mobile element 432 in rotation.

In this example, the mobile element 432 is able to pivot about an imaginary geometric axis, which is parallel to the longitudinal direction and which is preferably mounted on the upper section 412, with a result similar to that obtained with the suspension device 10 described above.

On the other hand, in this example, the mobile element 432 can have different arcuate portions 442, 440 that have different thicknesses such that the first and second elastic body materialize that respectively have a different first and second stiffness, when a pressure is applied on the suspension device 410 (see in particular Figures 28B and 28C).

On the other hand, as illustrated in Figure 28A, the mobile element 432 is capable of occupying a position in which the latter does not make any elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device (see in particular figure 28A).

In addition, in order to ensure the welding of the mobile element 432 on the suspension device 410, on the one hand, and to facilitate the passage of a position of said element 432 to another, on the other hand, the latter also comprises a sheet flexible 450 adapted to cooperate with at least a portion of a guiding element 420A and comprising a multitude of holes or fingers capable of cooperating with the corresponding fingers or holes of this guiding element 420A.

By means of Figures 7 to 12, a second embodiment of the suspension device will be described below outside the scope of the invention.

In this second embodiment, the suspension device 110 differs from the suspension device 10 described above in that the movable element is rotatably mounted about an axis perpendicular to the plate 114. The movable element 134 is in the form of a cursor having a head 170 intended to be operated by an operator, a rod 172 attached to the head and passing through an opening 160 made in the plate and carrying a disk 174. The upper face 174a of the disk, which is substantially parallel to the plane of the plate 114, has an annular seal 176 that cooperates with guiding portions 178 located on the lower surface 114a of the plate 114 in order to allow the rotating guidance of the cursor 134 with respect to the upper section 112.

Disc 174 carries two pairs of leaf springs, this is a first pair comprising two diametrically opposed leaf springs 180, and a second pair comprising two diametrically opposed leaf springs 182. The thickness c1 of the leaf springs 180 of the first pair is greater than the thickness c2 of the leaf springs 182 of the second pair such that the leaf springs 180 of the first pair have a stiffness greater than that of the leaf springs of the second pair It is necessary to specify here that the leaf springs are

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corrugated and extending from the periphery of the disk 174, in a direction perpendicular to the plate 114, towards the lower section 120.

The leaf springs 180 of the first pair constitute a first elastic body, while the leaf springs 182 of the second pair constitute a second elastic body. Taking into account the differences in thickness, the stiffness of the first elastic body 180 is superior to that of the second elastic body 182.

Referring to Figures 7 and 8, it is understood that the leaf springs 180, 182 are adapted to come into contact with the arc-shaped support 138, at least when a pressure is applied on the suspension device.

Referring now to Figure 11, which is a perspective view of the mobile element 134, it is understood that the latter has three positions.

In a first position of the movable element 134, the first elastic body 180 (composed of the two leaf springs 180 of the first pair facing each other) is arranged in front of the flexible arch-shaped support 138, so that when a pressure is applied on the suspension device 110, the two leaf springs 180 rest on the flexible support 138 so that an elastic coupling is made between the upper section 112 and the lower section 120. In this position, the suspension device 110 has great rigidity It is the "rigid" position.

In a second position of the mobile element 134, the leaf springs of the two pairs 180, 182, considered in the transverse direction DT of the suspension device 10, are located on both sides of the flexible support 138 such that when a pressure on the suspension device 110, none of the leaf springs is supported against the flexible support 138, the latter passing next to the support. The diametral distance between the leaf springs 180, 182 and the transverse width of the flexible support 138 will be selected such that this effect is obtained.

Therefore, in this second position, the movable element 134 does not make an elastic coupling between the upper section 112 and the lower section 120 when a pressure is applied on the suspension device 110. It is the "decoupled" position.

By rotating the mobile element, in this case the rotating cursor 134, the operator can modify the position of the mobile element and thus can regulate the rigidity of the suspension device 110.

In a third position of the mobile element 134, the second elastic body 182 (composed of the two leaf springs 182 of the second pair placed facing each other) is arranged in front of the flexible arc-shaped support 138, such that when a pressure is applied on the suspension device 110, the two leaf springs 182 rest on the flexible support 138 such that an elastic coupling is made between the upper sections 112 and the lower sections 120. In this position, the suspension device 110 has a large rigidity. This is the "semi-flexible" position.

A variant of the rotating cursor 134 ’is shown in Figure 12, which differs from the cursor of Figure 11 in that it also comprises a third pair of leaf springs 184’. These leaf springs 184 ’extend from the periphery of disk 174’, being diametrically opposed, and are located between leaf springs 180 ’and 182’. It is understood, therefore, that the rotating cursor 134 ’does not have an uncoupled position, unlike the rotating cursor 134 described above. In this example, the thickness of the leaf springs 184 ’of the third pair is less than the thickness of the leaf springs 180’, 182 ’of the first and second pair. However, the thickness of the leaf springs 184 ’of the third pair could be expected to be greater than the other thicknesses.

In this variant, the mobile element 134 'therefore has a third position in which the leaf springs 184' of the third pair, which constitute a third elastic body, are arranged in front of the flexible arc-shaped support 138, such that when a pressure is applied on the suspension device 110, the two leaf springs 184 'rest on the flexible support 138 such that an elastic coupling is made between the upper section 112 and the lower section 120. In this third position, the rigidity of the suspension device is inferior to that of the first and second positions. It is therefore a "flexible" position.

By means of Figures 13 to 17, a third embodiment will be described below outside the scope of the invention. The suspension device 210 represented in these figures consists, in the same manner as the suspension devices described above, of an upper section 212 and a lower section 220 connected to the upper section 212 by means of suspension means 230 having the shape of arched walls 230. In this example, the upper section 212 comprises a plate 214 and slat housings 216, 218, while the lower section 220 consists of anchoring means 222 surrounding a housing 224 for an additional slat.

The suspension device 210 further comprises a support 238 that has the shape of an arch. This stand

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238 extends in this example in the longitudinal direction DL of the suspension device between the anchoring means 222, the upper part of the arch being directed towards the upper section 212. In this example, the support 238 is flexible and has an elasticity in one direction perpendicular to plate 214.

In this third embodiment, the mobile element 234 is slidably mounted in the transverse direction DT of the suspension device 210. As a result, the mobile element 234 is carried from one position to another by a translational movement. In this example, the mobile element 234 therefore has the shape of a sliding drawer that is held and guided by means of two guide ramps 270 fixed to the bottom surface 214a of the plate 214, at the end 230 " of the arched walls 230. As can be seen in Figure 15, the guide ramps 270 extend in the transverse direction DT of the suspension device 210, and the movable element 234 has lateral fins 272 that are fitted between the ramps of guided 270 and the bottom surface 214a of the plate 214.

By means of Figures 17A and 17B, the movable element 234 will be described in more detail. As can be seen in these figures, the movable element 234 is formed by a plate 274 whose lateral edges form the fins 272. One of the faces 274a of the plate carries a control lever 276 which allows the operator to move in translation to the mobile element 234 in the transverse direction of the suspension device. As seen in Figures 14 and 15, the control lever 276 extends through an opening 260 formed in the plate 214 so that an operator can manipulate it.

The other side 274b of the plate 274 has three elastic arc-shaped sheets, that is a first, a second and a third elastic sheet with references 280, 282 and 284. Referring to Figure 14, it is verified that the sheets elastic are differentiated by their thicknesses, considering here the thickness in a direction perpendicular to the transverse direction to the plate 214. In this example, the thickness e1 of the first elastic sheet 280 is greater than the thickness e2 of the second elastic sheet 282, which it is in turn greater than the thickness e3 of the third elastic sheet 284. Here, the first, the second and the third elastic sheet 280, 282, 284 constitute a first, a second and a third elastic body which, in this example, have a spring effect in an orthogonal direction to the plate 214. Taking into account the thickness differences of the three elastic sheets, it is understood that the first elastic body has a stiffness greater than that of the second elastic body, the latter presenting a stiffness superior to that of the third elastic body.

As can be understood by means of Figure 14, the mobile element 234 can have three positions:

• a first position in which the first elastic body 280 is arranged in front of the support 238, such that the first elastic body 280 makes an elastic coupling between the upper section 212 and the lower section 220 when a pressure is applied on the device of suspension 210. This is the position

"Rigid" or "firm";

• a second position in which the second elastic body 282 is arranged in front of the support 238, such that the second elastic body 282 makes an elastic coupling between the upper section 212 and the lower section 220 when a pressure is applied on the device of suspension 210. This is the “semi-flexible” position;

• a third position in which the third elastic body 284 is arranged in front of the support 238, such that the third elastic body 284 makes an elastic coupling between the upper section 212 and the lower section 220 when a pressure is applied on the device of suspension 210. This is the "flexible" position that is precisely that shown in Figure 14.

In these three positions, when a pressure is applied on the suspension device, the corresponding elastic body (the elastic sheet) exerts a pressure on the support 238 while being elastically deformed. Under the effect of this pressure, the support 238 in turn elastically deforms. As a result, it is understood that an elastic coupling is made between the upper section and the lower section.

In a variant (not shown here), the mobile element only consists of two elastic sheets such that it has an uncoupled position in which the mobile element does not make an elastic coupling between the upper section and the lower section when a pressure is applied on the suspension device.

By means of Figures 29 to 33C, a fourth embodiment of the suspension device according to the invention will be described below.

In this fourth embodiment, the suspension device 510 differs from the suspension device 10 described above in that the mobile element is structured differently.

In particular, in this embodiment, the mobile element consists of a flexible sheet 540, as the first elastic body, capable of being disposed between the lower section 520 and the upper section 512, respectively in a first bending configuration, when the mobile element occupies a first position (best seen in figure 33A), in a second flexion configuration (different from the first), when the mobile element occupies a second position (best seen in figure 33B), and in a third configuration of flexion (different from the first and different

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of the second), when the mobile element occupies a third position (it is best seen in Figure 33C).

In particular, flexible sheet 540 is disposed between Lower 520 and upper 512 sections such that it has one or more flexion points (in particular three flexion points 542, 544 and 546).

The flexible sheet has a first end that is fixed with respect to the suspension device, in particular a first section between the lower section and the upper section (for example the lower section in this example); and a second end that is movable mounted on the suspension device such that the movable element can move between its three aforementioned positions.

In particular, this second end is capable of moving in a direction perpendicular to the plate direction of the suspension device, in particular in the transverse direction of the latter. This end is terminated by drive means 530 that can be maneuvered to move the mobile element and capable of cooperating with a rack 516 arranged in the upper section 512 to block the mobile element in any one of the three positions already mentioned.

When the mobile element adopts its first position, the flexible sheet takes a first flexion configuration in which it has an easily flexible portion between two of its flexion points 542 and 554, in particular because the distance L1, in the transverse direction DT ( which is perpendicular to the approach direction of the upper section with respect to the lower section), which separates these two points is large. Therefore, when a pressure is applied on the suspension device, the flexible sheet opposes a resistance to an elastic deformation with respect to this first bending configuration which is low. This results in that, when a pressure is applied on the suspension device, the flexible sheet has a first stiffness R1 that is relatively low and makes an elastic coupling between the upper section and the lower section with said first stiffness R1.

When the mobile element adopts its second position, the flexible sheet takes a second flexion configuration in which it has a less easily flexible portion between its flexion points 542 and 554 than in the first position of the mobile element, in particular because the distance L2 that separates these two points is lower in the second configuration than in the first. Therefore, when a pressure is applied on the suspension device, the flexible sheet opposes a resistance to an elastic deformation with respect to this second bending configuration which is more important. This results in that, when a pressure is applied on the suspension device, the flexible sheet has a second stiffness R2, which is greater than the first stiffness R1, and makes an elastic coupling between the upper section and the lower section with said second stiffness R2.

When the mobile element adopts its third position, the flexible sheet takes a third flexion configuration in which it presents an even less easily flexible portion between its flexion points 542 and 554 than in the second position of the mobile element, in particular because the distance L3 that separates these two points is smaller in the third configuration than in the second (in this example, this portion of the flexible sheet becomes substantially parallel to the direction of travel of the upper section with respect to the lower section, thereby which becomes practically rigid). Therefore, when a pressure is applied on the suspension device, the flexible sheet opposes a resistance to an elastic deformation with respect to this third flexion configuration which is even more important. This results in that, when a pressure is applied on the suspension device, the flexible sheet has a third stiffness R3, which is greater than the second stiffness R2, and makes an elastic coupling between the upper section and the lower section with said third stiffness R3.

By means of Figures 34 to 36C, a variant of the fourth embodiment described above will be described below.

In this variant, the suspension device 510 'differs from the suspension device 510 described above in that the mobile element 540' is structured differently.

In particular, in this variant, the flexible sheet 540 'of the mobile element 540 can be disposed between the lower section 520' and the upper section, respectively in only a first bending configuration, when the mobile element occupies a first position (it looks better in figure 36A), and in a second bending configuration (different from the first), when the movable element occupies a second position (it is best seen in figure 36B). In this way, the mobile element is capable of occupying only two positions in this variant.

Furthermore, in this variant, when the movable element passes from its first position to its second position, the flexible sheet 540 'buckles inverting the curvature of one of its flexion points 544', which makes this sheet less easily flexible and the rigidity that opposes the displacement of the upper section with respect to the lower section increases, when a pressure is applied on the suspension device.

On the other hand, in order to make the sheet 540 'even less flexible, when the movable element adopts its second position, it is advantageous that the buckling of sheet 540' causes a portion 546 'of the latter to abut a stop 548 'fixed with respect to the suspension device (see Figure 36B for more details).

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By means of Figures 37 to 42, a second variant of the fourth embodiment described above will be described below.

In this variant, the suspension device 610 differs from the suspension device 510 described above in that the mobile element 640 is structured differently.

In particular, in this example, the suspension device 610 for box spring or base consists of:

• an upper section 612 provided with a plate 614 capable of supporting a mattress;

• a lower section 620 comprising means that allow the fixing of the suspension device to the bed base, said lower section being connected to the upper section by means of suspension means 630;

• means for modifying the rigidity of the suspension device, which consists of a mobile element 640 with respect to the suspension device such that it can be moved at least between a first position (visible in figures 37 to 39) and a second position (visible in figures 40 to 42) to modify the rigidity of the suspension device.

In this example, the mobile element 640 is provided with at least a first elastic body 641 that is configured to elastically deform when the mobile element is moved from one position to another.

In this example, in the first position, the first elastic body 640 is tensioned in a first state of elastic deformation.

In this example, in the second position, the first elastic body 640 is tensioned in a second state of elastic deformation.

In this example, the first elastic body 641 is configured to elastically deform by buckling when the mobile element is carried from one position to another.

In this example, the mobile element 640 is capable of pivoting with respect to the suspension device around a first axis of rotation X1 and a second axis of rotation X2 to move from one position to another.

In this example, the first axis of rotation X1 is separated from the upper section 612 in the separation direction DS of the upper section 612 and the lower section 620, and the first elastic body is disposed between the first axis of rotation X1 and the upper section 612.

In this example, the first axis of rotation X1 is integral with the lower section 620. Thus, this axis X1 is configured to approach and then separate from the upper section 614 in the separation direction DS, when a pressure is applied on the suspension device and then relax.

In this example, the second axis of rotation X2 is integral with the upper section 612. Thus, this axis X2 is configured to approach and then separate from the lower section 620 in the separation direction DS, when a pressure is applied on the suspension device and then relax.

In this example, the first axis X1 and the second axis X2 are separated in the separation direction DS.

In this example, the first axis X1 and the second axis X2 are parallel to each other.

In this example, the first axis X1 and the second axis X2 are parallel to the plate 614.

In this example, the first elastic body 641 is configured to elastically deform at least in a transverse plane P that is parallel to the separation direction DS of the upper section and the lower section, when the movable element 640 is brought from a position to another.

In this example, the first axis X1 and the second axis X2 are perpendicular to this transverse plane P.

In this example, the device 610 comprises a plane of symmetry and is configured such that the transverse plane P is parallel to the plane of symmetry.

In this example, the device 610 is such that the suspension means 630 comprise several suspension elements 631 to 634 separated in a longitudinal direction DL of the device, and the transverse plane P is perpendicular to this longitudinal direction DL.

In this example, the mobile element 640 is provided with at least a second elastic body 642 which is capable of performing an elastic coupling between the upper section 612 and the lower section 620 with an associated stiffness, when a pressure is applied on the device suspension 610 while the mobile element 640 occupies its first position, and is not capable of performing said elastic coupling with said associated stiffness, when the

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Mobile element adopts the second position.

In this example, the mobile element 640 is configured so that, in the second position, the second elastic body 642 does not make any elastic coupling between the upper section 612 and the lower section 620.

In this example, the mobile element 640 comprises a first basic body 643 that is integral with the first axis of rotation XI.

In this example, the first basic body 643 is loose from the first axis of rotation X1 and is configured to be mounted directly on this axis. In particular, the first basic body comprises a clamp portion configured to support the first axis of rotation X1 with the first basic body 643 due to the pressure fixing effect.

In this example, the first basic body 643 is formed in one piece with a lower end of the first elastic body 641.

In this example, the mobile element comprises a second basic body 644 that is integral with the second axis of rotation X2.

In this example, this second basic body is formed in one piece with an upper end of the first elastic body 641.

In this example, the mobile element 640 forms a single piece.

By means of Figures 43 and 44, a third variant of the fourth embodiment described above will be described below.

In this variant, the suspension device 610 differs from the second variant described above in that the mobile element 740 is structured differently.

In particular, in this example, the mobile element 740 is able to pivot with respect to the suspension device around a first axis of rotation X1 similar to that described above and to slide with respect to said device in a sliding direction DT to pass from One position to another.

More particularly, in this example, the mobile element 740 comprises a sliding part 745 that is integral with the upper section 712 and capable of moving in the sliding direction DT when the mobile element 740 is carried from one position to another.

Furthermore, in this example, we find the same elastic deformation phenomenon of the first elastic body 741 described above in association with the second variant, when it is passed from one position of the mobile element 740 to another.

The forms or examples of embodiment described in the present description are given by way of illustration and not limitation, the person skilled in the art being able, taking into account this description, easily modifying these forms or examples of embodiment, or considering others, keeping within the scope of the claims.

In addition, the different characteristics of these forms or embodiments can be used alone or combined with each other. When combined, these characteristics may be as described above or differently, the invention not being limited to the specific combinations described in the present description. In particular, unless otherwise indicated, a characteristic described in relation to one embodiment or embodiment can be applied in a similar manner to another embodiment or exemplary embodiment.

Claims (17)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 Claims 1. Suspension device (510, 510 ’, 610, 710) for a bed base or base, consisting of: ♦ an upper section (512, 612, 712) provided with a plate (514, 614, 714) capable of supporting a mattress; ♦ a lower section (520, 520 ', 620, 720) comprising means that allow the fixing of the suspension device to the bed base or to the base, said lower section being connected to the upper section by means of suspension means (630, 730 ); ♦ means for modifying the rigidity of the suspension device, which consist of a movable element (540, 540 ', 640, 740) with respect to the suspension device so that it can move at least between a first position and a second position to modify the rigidity of the suspension device; wherein the mobile element (540, 540 ', 640, 740) is provided with at least a first elastic body that is configured to elastically deform when the mobile element is carried from one position to another, characterized in that the mobile element is capable of pivoting with respect to the suspension device about at least a first axis of rotation (X1) integral with the lower section to move from one position to another. 2. Suspension device (510, 510 ’, 610, 710) according to claim 1, wherein, in the first position, the first elastic body is tensioned in a first state of elastic deformation. 3. Suspension device (510, 510 ’, 610, 710) according to claim 1 or 2, wherein, in the second position, the first elastic body is tensioned in a second state of elastic deformation. 4. Suspension device (510, 510 ’, 610, 710) according to any one of claims 1 to 3, wherein the first elastic body is configured to elastically deform by buckling when it is carried moving element from one position to another. 5. Suspension device (610, 710) according to any one of claims 1 to 4, wherein the movable element (640, 740) comprises a first basic body that is loose from the first axis of rotation (X1) and configured to mount on said axis. 6. Suspension device (510, 510 ', 610, 710) according to any one of claims 1 to 5, wherein the first axis of rotation (X1) is separated from the upper section in the separation direction ( DS) of the upper section and the Lower section, and the first elastic body is disposed between the first axis of rotation (X1) and the upper section. 7. Suspension device (510, 510 ', 610, 710) according to any one of claims 1 to 6, wherein the first elastic body is configured to elastically deform in at least one transverse plane (P) which is parallel to the separation direction (DS) of the upper section and the lower section, when the mobile element (540, 540 ', 640, 740) is carried from one position to another. 8. Suspension device (510, 510 ’, 610, 710) according to claim 7, comprising a plane of symmetry and configured such that the transverse plane (P) is parallel to the plane of symmetry. 9. Suspension device (510, 510 ', 610, 710) according to claim 7 or 8, wherein the suspension means (630, 730) comprise at least two suspension elements (631 to 634, 731, 732) separated in a longitudinal direction (DL) of the device, and the transverse plane (P) is perpendicular to this longitudinal direction (DL). 10. Suspension device (610) according to any one of claims 1 to 9, wherein the movable element (640) is provided with at least a second elastic body (642) which is capable of performing an elastic coupling between the upper section (612) and the lower section (620) with an associated stiffness, when a pressure is applied on the suspension device (610) while the mobile element (640) occupies its first position, and it is not able to perform said elastic coupling with said associated stiffness, when the movable element adopts the second position. 11. Suspension device (610) according to claim 10, wherein the movable element (640) is configured so that, in the second position, the second elastic body (642) does not make any elastic coupling between the upper section (612) and the lower section (620). 12. Suspension device (610) according to any one of claims 1 to 11, wherein the movable element (640) is rotatably mounted with respect to the suspension device about a second axis of rotation (X2). 13. Suspension device (610) according to claim 12, wherein the second axis of rotation (X2) is integral with the upper section (612). 5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 14. Suspension device (510, 510 ', 710) according to any one of claims 1 to 13, wherein the movable element (540, 540', 740) is slidably mounted with respect to the suspension device in a sliding direction (DT). 15. Suspension device (510, 510 ', 710) according to claim 14, wherein the movable element comprises a sliding part (530, 530', 745) that is integral with the upper section and capable of being moved in the sliding direction (DT) when the moving element is carried from one position to another. 16. Suspension device (510, 510 ', 610, 710) according to any one of claims 1 to 15, wherein the suspension means (630, 730) have a so-called suspension stiffness when a pressure is applied on the suspension device, and the suspension means and the mobile element (540, 540 ', 640, 740) are configured so that said suspension stiffness does not vary when the mobile element is moved from one position to another. 17. Suspension device (510, 510 ', 610, 710) according to any one of claims 1 to 16, wherein, when a pressure is applied on the suspension device while the mobile element (540, 540' , 640, 740) adopts its first position, the upper section and the lower section move relative to each other in a predetermined travel path, and the suspension means (630, 730) and the first elastic body are elastically deformed from simultaneously in at least a part of said travel path.