Patent Grant
11006764
The present invention relates to a mattress arrangement, such as a bed arrangement, having adjustable firmness. It also relates to a pocket spring mattress useable in such a mattress arrangement, and to a method for controlling such a mattress arrangement.
In mattress arrangements, such as in a bed arrangement or other seating or furniture arrangements, a support is provided to act on the weight or part of the weight of a user, wherein the bed distributes the weight from the body of the user over a part of a surface of the device. Depending on how the bed distributes the weight of the user, the bed will appear as being either soft or firm. The degree of firmness of such a bed is dependent on the properties of the elastic elements, such as the spring constant, and how the elastic elements have been mounted in the bed, such as the degree of clamping or pre-tensioning. Thus, the firmness of the bed is normally set at the manufacturing of the device.
However, different persons wish and require different firmness. Further, different body parts may require different firmness.
It is known to provide bed arrangements with variable firmness. By inducing deformation to the elastic elements to different degrees, the firmness of the device is adjustable. The deformation member has the ability to deform the elastic element independently from the deformation of the elastic element induced by the being. This means that the firmness of the bed is adjustable during initialization, according to the wishes of the user. It is also possible to compensate the firmness of the device for possible changes in the elastic properties of the elastic arrangement over time. Such known solutions are e.g. disclosed in EP 2 245 967 and WO 2009/120270.
Further, it is known to provide variation in firmness of a mattress by arranging coil springs on support plates having variable height. The height of the support plates may be controlled by rotatable elements arranged under the support plates, and having an off-centre rotation axis. Hereby, by rotation of the rotatable elements, the plates assume various height positions. Such firmness adjustment means are e.g. discussed in U.S. Pat. No. 3,340,548 and US 2011/0258772. It is also known to use a similar arrangement with support plates having variable height where the height of the support plates may be controlled by displacement members in the form of linear motors, jacks, and other types of lifting mechanism. Such firmness adjustment means are e.g. discussed in AU 55 13 00, U.S. Pat. No. 4,222,137, US 2006/0253994, WO 99/65366 and EP 2 245 967.
However, common problems with these previously known bed arrangements with variable firmness are that they are relatively complex, heavy and costly to produce. Further, these known bed arrangements are also often relatively difficult and cumbersome to use. Further, even though these known bed arrangements provide a certain degree of adjustability, this is often inadequate for the users' needs.
Another approach is presented in U.S. Pat. No. 8,176,589, by the same applicant as in the present application, in which the bed has a variable width, and the mattress is arranged to be expanded/contracted together with the expansion/contraction of the bed frame. However, a significant drawback of this approach is that the size of the bed varies significantly.
Still further, EP 2 923 610 by the same applicant discloses a bed arrangement with two mattresses, wherein the lower mattress is allowed to expand and contract, and a plate arranged between the two mattresses, thereby concealing the empty spaced created when the lower mattress is contracted. However, this solution is also relatively complex and costly, and also the plate is a disadvantage in certain situations and for certain applications.
It is therefore still a need for a mattress arrangement, and in particular a bed arrangement, with adjustable firmness which alleviates the above-discussed problems.
It is therefore an object of the present invention to at least partly overcome these problems, and to provide an improved mattress arrangement.
These, and other objects that will be apparent from the following, are achieved by a mattress arrangement and a method for controlling a mattress arrangement, according to the appended claims.
According to a first aspect of the invention, there is provided a pocket spring mattress arrangement comprising:
a pocket spring mattress having a plurality of pocketed units of coil springs individually arranged in pockets formed of a casing material, said pocket spring mattress having at least two parts of which at least one is a compactable part; at least one elongate actuation member extending perpendicular to a compacting direction for said compactable part(s), said compacting direction corresponding to a width or length direction of the mattress, and being embedded within the mattress between two of said parts, said actuation member being moveable in the compacting direction to expand or contract at least one of the one or more compactable part(s) of the mattress.
The mattress arrangement may be a bed arrangement, but other types of seating or furniture arrangements are also feasible. In particular, the mattress arrangement comprises a mattress, e.g. in the form of a bed mattress, a cushion or the like, for accommodating the weight of a user. Such mattresses may e.g. be used in seats for all sorts of vehicles, upholstered furniture, davenports, bed arrangements and the like.
The mattress arrangement may further comprise a bed frame or the like, on which the mattress rests.
Further mattress(es), padding layer(s), etc may also be provided. Further, the whole mattress arrangement may also be commonly enclosed in a cover fabric.
The compaction of the mattress preferably occurs in the length direction of the mattress, but may alternatively or additionally occur in the width direction.
The sleeping/sitting/resting experience, and what is considered comfortable and not, varies greatly from person to person. Further, a user often may find it more comfortable to have a softer mattress when using one lying position, such as on the stomach, i.e. in a prone position, or on the side, than when resting in other sleeping positions, such as on the back, i.e. in supine position. The present invention provides an efficient, yet relatively simple and cost-efficient, way of varying the mattress properties in dependence of the user's wishes, and e.g. based on the choice of lying position. It has been found that this greatly improves the sleeping and resting experience, which provides better resting and sleeping quality. Improved sleep and rest also improves the health of the user, and overall leads to an improved quality of life.
Prior to the present invention, mattresses and seats/beds with adjustable properties were known to be complex, heavy and costly, and also difficult and cumbersome to use. In contrast, the present invention provides a mattress arrangement, such as a bed arrangement, with adjustable properties which weighs very little, is relatively simple and cost-efficient to produce, which is easy to operate for the user. The mattress arrangement also lends itself very well for automated or semi-automated manufacturing.
Still further, the mattress arrangement of the present invention may provide fixed outer dimensions, since the contraction of the mattress may occur in distinct zones, the contraction being compensated by expansion of other zones. Thus, the overall size and appearance of the mattress arrangement remains the same, regardless of the firmness settings being used.
It has been found that by this variation of the extension and contraction of certain zones, a wide degree of different firmness settings for the mattress arrangement may be obtained. The firmness is also controllable in a very precise and predictable way.
The pocket spring mattress comprises a plurality of coil springs arranged in pockets. Most preferably, the pocket spring mattress comprises a plurality of parallel strings interconnected side by side, each string comprising a plurality of continuous casings and each casing comprising a coil spring, wherein expansion of the mattress into the expanded state occurs in a least one of a direction being parallel to the strings and a direction being perpendicular to the strings. Mattresses of these types are per se known. One mattress type which is suitable for use in connection with the present invention is the one disclosed in U.S. Pat. No. 8,176,589, by the same applicant, which relates to a pocket spring mattress in which a plurality of stretch openings are formed in the cover material forming the pockets, allowing the strings to be separated from each other. This document is hereby incorporated by reference. Another mattress type which is also suitable for use in connection with the present invention is the one disclosed in U.S. Pat. No. 7,048,263, also by the same applicant, which relates to a pocket spring mattress in which a separation distance is formed between adjacent springs/pockets within each string, allowing the mattress to be expanded and contracted in the direction of the strings. This document is hereby also incorporated by reference. Still another example of a mattress type which is suitable for use in connection with the present invention is the one disclosed in US 2007/124865, also by the same applicant, which relates to a pocket spring mattress in which a separation distance is formed between adjacent springs/pockets within each string, and wherein a slit opening is provided within each separation, further improving the capability of the mattress to be expanded and contracted in the direction of the strings. This document is hereby also incorporated by reference.
The strings are preferably arranged to extend in the length direction of the mattress.
The mattress may further assume at least one, and preferably a plurality, of intermediate states, between the expanded state and the contracted state. In a preferred embodiment, the mattress is continuously controllable to be set in any intermediate state between the expanded state and the contracted state.
The mattress preferably has fixed outer dimensions. Hereby, the outer boundaries of the mattress remain the same during adjustment of the firmness of the mattress. Preferably, the mattress may comprise at least two compactable parts, wherein said elongate actuation member is arranged to contract one of said compactable parts while simultaneously expanding the other compactable part. Hereby, one of the parts may be contracted simultaneously and to the same degree as the other is expanded. However, more than two parts may also be provided. If e.g. three parts are used, two parts may be contracted while the other, preferably arranged between the other two parts, is expanded, and vice versa. Hence, the length of expansion and contraction of the central part may be correspondingly assumed by the other two parts, in equal or different shares.
Hereby, the mattress maintains the same size at all times. At the same time, it has been realized by the present inventor that certain parts of the mattress are more sensitive and more important in respect of firmness adjustment than others. For example, it is generally of more importance to make the central part of the mattress, underlying the user's buttocks, adjustable, and in particular the region between a user's hip/buttocks and shoulder, than the parts towards the end of the mattress, underlying the user's head and legs, respectively. By means of the present invention, adequate adjustment possibilities are provided for the more sensitive parts, and these adjustments, realized as a contraction or expansion, are compensated by a corresponding adjustment of the other parts. Thus, if the user wants a firmer mattress, the part underlying the user's buttocks is made firmer by contracting this part. At the same time, one or more other parts are made less firm, but this would generally be hardly noticeable for the user. Thus, the overall impression for the user is that the mattress has been made firmer, even though there has in fact only been a redistribution of the firmness of the mattress. In the same way, if the user wants a softer mattress, the part underlying the user's buttocks is made softer by contracting this part. At the same time, one or more other parts are made less soft, but this would again generally be hardly noticeable for the user. Thus, the overall impression for the user is that the mattress has been made softer, even though there has again in fact only been a redistribution of the softness of the mattress.
These two, three or more parts may be arranged sequentially after each other in the length direction of the mattress. However, alternatively, the two, three or more parts may be arranged sequentially after each other in the width direction of the mattress. Further, it is also feasible to have the separation between different parts in both a length direction and a width direction of the mattress. For example, the mattress may comprise nine parts, being arranged in three rows in the length direction and three columns in the width direction. The parts are separated from each other by the elongate actuation member(s). Thus, the parts may be formed within a single, integrated mattress core, or be formed by one or more separate mattress cores.
The mattress may comprise several adjustable/compactable parts, but may also comprise non-compactable parts. Thus, the mattress may comprises a combination of one or more compactable part and one or more non-compactable parts, but may also comprise a combination of two or more compactable parts without any non-compactable parts.
The pocketed units preferably comprise a plurality of parallel continuous strings interconnected side by side, each string being formed of a continuous casing material, enclosing a plurality of coil springs in individual pockets, forming a line of integrated pocketed units.
The continuous strings preferably extend in the compacting direction.
The pocket spring mattress arrangement may further comprise at least one elastic element arranged to provide a contraction force to bring the mattress, or part of the mattress, to the contracted state. Hereby, this part of the mattress will resume a contracted state when no exterior force is applied. This simplifies operation of the mattress. For example, the elongate actuation member may consequently be maneuvered in one direction, e.g. by being pulled by manipulation elements, and brought back in the other direction when release by means of the elastic elements. Further, the elastic elements may, additionally or alternatively, be used to ensure that the distribution of springs in this part of the mattress remains uniform also in every intermediate state, between an expanded state and a contracted state. The elastic element may e.g. a band, string, cord or the like of an elastic material. Preferably, a plurality of elastic elements is provided, being distributed over or within the mattress or the part of the mattress. Further, it is preferred that each elastic element is connected to the mattress at a plurality of distributed connection points. In particular, it is preferred that each elastic element is connected to a plurality of pockets, and preferably to each pocket it is in contact with.
The elastic element(s) may be arranged on the top surface of the mattress, on the lower surface of the mattress, at one or several sides of the mattress, integrated within the mattress, or any combination thereof. In a pocket spring mattress, at least some of the elastic elements may extend between adjacent rows/strings of pocketed springs.
The above-discussed elastic elements are arranged on or integrated in the mattress, and are used to provide a contraction of the mattress, to bring part of the mattress into a contracted state. At the same time, a counterforce is provided by means of the elongate actuation member for expanding a part of the mattress and bringing this part to an expanded or contracted state, or an intermediate state between the fully contracted state and the fully expanded state. By releasing the counterforce, the lower mattress is automatically contracted and brought back to a contracted state, being the resting or default state.
However, alternatively resilient elements, such as springs, may instead be arranged to automatically bring the mattress into an expanded state, in which case the counterforce of the elongate actuation member should instead be provided to bring this part of the mattress into a more contracted state, and whereby a release of the counterforce instead brings this part of the mattress back to an expanded resting or default state.
The at least one elastic element may extend between a first end and a second end in an extension direction, said extension direction corresponding to at least one of a length and width direction of the mattress, wherein said at least one elastic element is arranged to provide a contraction force to bring said first and second ends towards each other, thereby providing a contraction force to contract the one or more part(s) of the mattress extending between said first and second end(s) in the extension direction.
At least some of the elastic elements may be arranged above or underneath a line of pocketed units, and connected to at least some end surfaces of said pocketed units. Additionally or alternatively, at least some of the elastic elements may be arranged between lines of pocketed units, and connected to longitudinal surfaces of at least some of said pocketed units.
However, embodiments without any elastic elements are also feasible. For example, the elongate actuation member(s) may be maneuverable in two direction, thereby being actively maneuverable both for contraction and expansion.
The one or more elongate actuation member(s) may be provided by rods or plates of a relatively rigid material, such as wood, steel or the like. Preferably, the elongate actuation member(s) is very rigid in a movement direction, but may be less rigid, or even flexible, in a direction perpendicular to the movement direction. Hereby, the risk that the user may feel the elongate actuation member during use is even further diminished. Different flexibility in different directions can be obtained for example by hinge joints, by specific selection of shapes and materials, etc.
Preferably, the elongate actuation member(s) is (are) not arranged underlying a user's hip, buttocks or shoulders, thereby making the elongate actuation member(s) less discernible for the user.
In some embodiments, there may be only one single elongate actuaton member, arranged between two parts of the mattress. However, preferably, the mattress arrangement comprises at least two elongate actuation members, extending in parallel to each other and perpendicular to the compacting direction, and at a distance from each other, arranged between three parts of the mattress. Also, more than two elongate actuation members may be used, such as three, four or even more.
The elongate actuation member(s) may extend through pocket units. However, preferably, the elongate actuation members extend between rows of pockets units, such as between strings of pocket units, or through strings of pockets units. In the latter case, the elongate actuation members may be arranged through openings arranged between the pocket units in the strings.
The elongate actuation member(s) may be connected and attached to the mattress. However, alternatively, the elongate actuation member(s) may be loosely held within the mattress, such as being loosely received within opening of the strings or the like.
The elongate actuation member(s) may extend over at least 50% of the length of the width (if arranged along the width) or length (if arranged along the length) of the mattress, and preferably at least 70%, and most preferably at least 90%. Further, the elongate actuation member(s) may extend over less than the entire width or length of the mattress. However, in some embodiments, the elongate actuation member(s) may also have an extension exceeding the width or length, so that the ends of the elongate actuation member(s) extend out from the sides of the mattress. Hereby, movement of the elongate actuation members can be effected from the sides of the mattress, and manipulation need not occur within the mattress. This facilitates realization of the mattress, and also makes it more cost-efficient.
The elongate actuation members are preferably moved from a remote position, and are preferably maneuvered by means of manipulation elements. The manipulation elements may be manually operable elements, such as rods, wires and the like, being operable from a side of the mattress arrangement for moving the elongate actuation members to a desired position. However, preferably, the manipulation elements are connected to and controllable by an electrically operated actuator, such as a linear actuator, an electric hydraulic piston, an electric motor, or the like. Hence, movement of the elongate actuation members may be effected via a user interface, e.g. comprising control buttons, a touch screen or the like.
In one embodiment, the mattress arrangement comprises at least one manipulation element, such as a pulling wire, extending in the compacting direction, and connected to the at least one elongate actuation member, for controlled movement of the elongate actuation member in the compacting direction. Further, the mattress arrangement may comprise an electric actuator for controlled pulling of the manipulation element(s).
The manipulation arrangement may comprise a pulling or pushing arrangement, and may e.g. comprise one or several ropes, strings or the like connected to a side of the lower mattress or within the mattress. Such an arrangement is very cost efficient, and is in particular suitable for manual operation, but also for automated, electric maneuvering. In manual operations, the ropes/strings may e.g. be locked in a suitable pulled out position by a locking arrangement, be tied together, or in any other way secured. However, the ropes/strings may also be operated by an electric motor or the like. Further, the moveable side of the lower mattress may be connected to a rigid pulling or pushing element, which may be displaced automatically, by an electric motor or the like.
In case two or more elongate actuation members are provided, these may be independently maneuvered from two different sides of the mattress. However, they may alternatively be moved in correlation to each other, and preferably by being connected to a common manipulation arrangement.
According to another aspect of the invention, there is provided a method for adaptation of the firmness of a mattress arrangement, comprising the steps:
providing a pocket spring mattress, said pocket spring mattress having at least two parts of which at least one is a compactable part; providing at least one elongate actuation member extending perpendicular to a compacting direction for said compactable part(s), said compacting direction corresponding to a width or length direction of the mattress, and being embedded within the mattress between two of said parts, said actuation member being moveable in the compacting direction; and
controlling the movement of the elongate actuation member(s) to expand and/or contract the one or more compactable part(s) of the mattress.
By means of this additional aspect of the invention, similar objects and advantages as discussed above in relation to the first aspect of the invention are obtainable.
These and other aspects of the present invention will now be described in more detail, with reference to the appended drawings showing currently preferred embodiments of the invention.
In the following, the invention will be exemplified by means of bed arrangements. However, it is to be acknowledged by the skilled reader that the same principles and functions may also be used in other types of mattress arrangements using mattresses, e.g. in the form of a bed mattress, a cushion or the like, such as seats for all sorts of vehicles, upholstered furniture, and the like. Accordingly, when reference in the following is made to a bed or bed arrangement, it is to be understood that this may also be used in other types of mattress arrangements, and in particular other types of furniture arrangements.
A mattress arrangement having a mattress 1 with adjustable firmness according to a first embodiment of the invention is shown schematically in
The mattress defines at least two, and preferably at least three parts 4a, 4b, 4c with adjustable firmness. In the illustrative example, three parts are provided. These parts may be formed of separate pocket mattresses elements, or be formed of a continuous mattress element extending over two or more zones.
The mattress further preferably comprises at least one elastic element 5 arranged to provide a contraction force to contract one or more of the part(s) of the mattress in a compacting direction. In this embodiment, such elastic elements 5 are arranged in the central part 4b. However, elastic elements may additionally or alternatively be provided in one or more of the other parts, and may also, alternatively, extend over several parts, or all the parts, as will be discussed in more detail in the following.
The elastic elements 5 of this embodiment provides a contraction of the central part 4b, thereby compacting this part in the length direction of the mattress. However, in other embodiments, the compacting may alternatively or additionally be made in the width direction of the mattress.
Further, at least one elongate actuation member 6 is provided. This elongate actuation member 6 extends perpendicular to the compacting direction, i.e. in the width direction in this embodiment. The elongate actuation member is preferably rigid or relatively rigid, and may e.g. be realized as a rod, a narrow plate or the like. The elongate actuation member(s) is moveable in the compacting direction, i.e. here the length direction, of the mattress, and is embedded in the mattress. Hereby, the elongate actuation member(s) is useable to contract or expand one or more of the parts of the mattress. If the elongate actuation member(s) is maneuverable both to contract and expand the parts, the elastic elements may optionally be omitted.
In the illustrative example, two elongate actuation members are provided, arranged between the first part 4a and the second part 4b, and between the second part 4b and the third part 4c, respectively.
In the illustrative example, the elastic elements 5 are connected to the elongate actuation members. However, in other embodiments, the elastic elements may also be connected to one or both of the side walls. Further, the elastic elements may additionally or alternatively be connected to pocket units of one or several of the mattress parts.
The elongate actuation members are preferably moveable by manipulation elements 61, here in the form of strings, wires, cords, bands, rods or the like attached to the elongate actuation members 6, and extending through or beneath the adjacent mattress parts 4a and 4c to the side walls 2. Thus, by pulling the manipulation elements 61, the elongate actuation member will move towards the side wall, thereby expanding the central mattress part, and correspondingly compacting the mattress part between the elongate actuation member and the side wall. The manipulation elements 61 are preferably fixable in one or more retracted positions, and preferably in several or even all possible retracted positions.
Thus, in this illustrative example, when the manipulation elements 61 are in an extended of free position, the elastic elements 5 will move the elongate actuation members 6 together, thereby expanding the mattress parts 4a and 4c at the sides, and compacting the central mattress part 4b. This increases the firmness of the mattress experienced by the user. Such a firmer state is illustrated in
The sides of the mattress being closest to the short sides are preferably connected or fixed in relation to the frame, thereby maintaining a fixed outer boundary of the mattress during adjustment. For example, the pockets closest to the short sides may be connected to the side walls 2. Alternatively, rods or the like attached to the frame may be arranged at the short sides, and connected to the mattress, e.g. by being attached to the pocket units closest to the short sides, or being arranged between the rows of pocket units closest to the short sides.
The mattress arrangement may also comprise an external cover, one or more additional mattresses, and the like. Such embodiments are illustrated in
With reference to
However, the provision of an upper mattress 72 is not necessary, and in simpler configurations, only the adjustable mattress 1 may be provided. Such a simpler configuration is illustrated in
The mattress is a pocket spring mattress, comprising several parts, being integrated into a single pocket core, or provided as individual, separate pocket cores. The pocket core(s) is preferably arranged as continuous strings, being connected to each other. Expansion of the mattress into the expanded state occurs in a least one of a direction being parallel to the strings and a direction being perpendicular to the strings. Each string is preferably formed by continuous cover material, and the separation between adjacent pockets being formed by lateral separation joints. These separation joints, as well as longitudinal joints, may be formed through any form of adhesive bonding, welding, stapling, sewing, or any combination thereof. In a preferred embodiment, welding is used. Coil springs of many different sizes could be used in conjunction with the present invention, and in principle any desired spring size, large or small, may be used. Preferably, however, the coil springs have a diameter in the range 2-10 cm, and preferably in the range 4-8 cm, such as 6 cm. In addition, the coil springs are preferably manufactured from helically coiled wires. The springs preferably comprise at least three turns, and preferably fewer than 10 turns. Moreover, they are advantageously made of spiral wire with a thickness in the range 0.5-3.0 mm, preferably a wire thickness in the range 1.25-2.50 mm. Preferably the springs are slightly spool-shaped, that is with smaller turns at the top and bottom. Mattresses of these types are per se known.
One mattress type which is suitable for use as the lower mattress is the one disclosed in U.S. Pat. No. 8,176,589, by the same applicant, said document hereby incorporated in its entirety by reference. Such a mattress is illustrated in
Another mattress type which is suitable for use as the lower mattress is the one disclosed in U.S. Pat. No. 7,048,263, also by the same applicant, said document also being incorporated by reference in its entirety. Such a mattress is illustrated in
Still another mattress type which is suitable for use as the lower mattress is the one disclosed in US 2007/124865, also by the same applicant, said document also being incorporated by reference in its entirety. Such a mattress is illustrated in
Another mattress type which is suitable for use as the lower mattress is similar to the one disclosed with reference to
At least one part of the mattress further comprises at least one elastic element extending through the mattress or the part of the mattress, and between a moveable side and an opposite side of the mattress, or mattress part, wherein the at least one elastic element is arranged to provide a contraction force to bring the mattress or mattress part to the contracted state. Hereby, the mattress or mattress part will resume a contracted state when no exterior force is applied. This simplifies operation of the mattress and also ensures that the distribution of springs in the mattress or mattress part remains uniform also in every intermediate state, between the expanded state and the contracted state. The elastic element may e.g. a band, string, cord or the like of an elastic material. Preferably, a plurality of elastic elements is provided, being distributed over or within the mattress or mattress part. Further, it is preferred that each elastic element is connected to the mattress or mattress part at a plurality of distributed connection points. In particular, it is preferred that each elastic element is connected to a plurality of pockets, and preferably to each pocket it is in contact with. Specifically, such elastic elements may be combined with any of the pocket spring mattress types discussed above in relation to
In the embodiment of
In
In
Alternatively or additionally, the elastic elements 5 may be arranged on the sides of the mattress, and in between the strings. Such an embodiment is illustrated in
In the embodiments illustrated in
In the embodiments discussed with reference to
The elongate actuation member may also be provided in openings within the strings. Such an illustrative example is shown in
Movement of the elongate actuation member(s) may be effected by manipulation elements, such as a push or pull arrangement. The manipulation elements are thus preferably arranged to exert a pulling or pushing force to the elongate actuation member(s) from a distance, thereby effecting contraction and/or expansion of the corresponding mattress parts. The manipulation elements may be in the form of solid rods, etc, which are able to be manipulated from an outer side of the mattress arrangement. However, preferably, the manipulation elements are in the form of a flexible, elongate structure, such as cords, wires, strips or the like. The manipulation elements are preferably not stretchable, and non-elastic. For example, the manipulation elements may be realized as steel wires.
The manipulation elements may extend underneath the mattress, at the sides of the mattress or through the mattress.
The manipulation elements may be manually manipulated, and may be lockable at any desired position by suitable locking or securing arrangements, such as clamps, by being tied together and the like.
However, the manipulation elements may also be operated by an electric motor or the like. A knob, wheel, depressible buttons, a touch screen or any other type of user interface may then be operated resulting in a corresponding displacement of the elongate actuation member(s).
Some embodiments of such manipulation elements will be illustrated in the following.
The embodiment of
In the embodiment of
Even though the shaft and roller are shown as being arranged in the plane of the mattress, and exterior from the short side of the mattress, it is to be appreciated by the skilled artisan that many other placements of the manipulation arrangement are also feasible, such as below the mattress and the like. Further, the manipulation elements need not extend along straight lines, but may be arranged in curved paths, in particular outside the mattress. Sliding surfaces, rollers and the like may be arranged to provide a smoot transition between different extension directions.
In another embodiment, similar to the one discussed in relation to
In the embodiments discussed in relation to
In the embodiment of
In the above-discussed embodiments, the manipulation arrangement comprises a rotatable shaft. However, many other arrangements for effecting pushing and/or pulling of the manipulation elements are feasible.
In yet another embodiment, shown in
In this embodiment, a single manipulation arrangement is provided for operation of both the elongate actuation members, but again it should be acknowledged that more than one manipulation arrangement may also be used.
In the illustrated manipulation arrangement, the manipulation element(s) 61′″ form a closed loop, being made of a single manipulation element, or a plurality of connected manipulation elements. In particular, the manipulation arrangement may comprise a steel wire, and preferably a single steel wire arranged in a closed loop. The manipulation element is connected to the connector 65 being controllably displaceable by the piston 63′, here arranged close to one of the short ends of the mattress. The wire extends to one corner of the mattress, and to a roller 64′, sliding surface, hook or the like. The wire then continues in parallel with the long side of the mattress past an end of one elongate actuation member 6 to which it is connected, and to a roller 64″ or the like arranged at the opposite corner. The wire then extends back, parallel to the same long side, and past an end of the other elongate actuation member 6, to which it is connected, and to a second roller 64″′ or the like, arranged in the first corner. The wire then continues parallel to the short side, and to the opposite corner, and to another roller 64′″ or the like, and down along the second long side. Here, the wire first passes the first elongate actuation member 6, to which it is connected, down to the opposite corner, and a roller 64″ or the like, and up towards the first short side again, via an end of the second elongate actuation member 6, to which it is connected. Finally, the wire continues via a roller 64′ or the like to the connector 65 again, thereby closing the loop.
Thus, by moving the connector 65 in one direction, such as to the right in the figure, by means of the piston, the wire moves in one direction along the loop, such as clockwise, thereby moving the elongate actuation members 6 simultaneously away from each other. By moving the connector 65 in the other direction, such as to the left in the figure, the wire moves in the other direction along the loop, such as counter-clockwise, thereby moving the elongate actuation members 6 simultaneously towards each other.
As in the previous embodiments, the ends of the mattress 1 are fixed in place. In this embodiment, rods 2′, such as steel rods, are arranged at the ends of the mattress, such as between the outermost two rows of spring units, and connected to the frame 2″, such as to the bottom of the frame or one or several side walls of the frame.
Further, elastic elements 5 may be provided for providing a retracting force to parts of the mattress or the entire mattress. In this example, the elastic elements 5 extend over the full length or essentially the full length of the mattress. The elastic elements are here also only indicated with dashed lines, not to obscure the other parts. However, since the elongate actuation members are here actively moved both back and forth, the elastic elements are here primarily used to provide a good distribution of the pocket units within each part and in each state, but the elastic elements may in this embodiment also be omitted.
As the elongate actuation members 6 are moved towards each other, by moving the connector 65 to the right in the figure, the central part of the mattress, between the elongate actuation members, is compressed, whereas the outer parts adjacent the short sides of the mattress 1 are expanded. Hereby, a user will perceive the mattress as being firmer. When the elongate actuation members 6 are moved away from each other, by moving the connector 65 to the left in the figure, the central part of the mattress, between the elongate actuation members, will instead be expanded, whereas the outer parts adjacent the short sides of the mattress 1 are instead compressed. Hereby, the user will instead perceive the mattress as being softer.
In this embodiment, the manipulation elements are arranged outside the mattress, thereby avoiding interference with the springs etc, and also providing a more cost-efficient assembly.
In the previously discussed embodiments, two elongate actuation elements are provided. However, as already mentioned, three or more elongate actuation members may also be used. It is also possible to use only one elongate actuation member. Such an embodiment is illustrated in
In all the above-discussed embodiments, the expansion and compacting occurs in a length direction of the mattress. However, it is also possible to provide the expansion and contraction in a width direction. Such an embodiment is illustrated in
As already mentioned, the adjustable mattress may be arranged in combination with another mattress, such as another pocket spring mattress, a foam mattress, or the like. Further, the adjustable mattress may be combined with one or several padding layers or the like.
Preferably, a low friction surface is arranged on at least one side of the adjustable mattress. Such a low friction surface may be provided by means of a sheet of low friction material, such as polyether sheet. Such a sheet may be provided between the adjustable mattress and another mattress, or on top of the mattress, if no other mattress is provided, or between the adjustable mattress and an overlying padding. The low friction sheet lowers the resistance for adjusting the adjustable mattress. Hereby, less power is required for the adjustment, and also, there is less risk of deformations and the like.
Similarly, if the adjustable mattress rests on a frame plate, the frame plate preferably is made of a material providing a low friction surface. For example, the base plate may be made of reinforced plastic material. Alternatively, a sheet of low friction material, such as a polyether sheet, may be arranged between the base plate and the adjustable mattress.
The person skilled in the art realizes that the present invention by no means is limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. For example, the adjustable mattress may be arranged in various combinations with an additional mattress, paddings and sheets. Further, the elastic elements may be arranged over only some parts of the mattress, or in multiple parts, or in all parts, or extending over several or all of the parts. Also, the elastic elements may be arranged in various ways, such as above, underneath and/or between the pocket units. Further, the elongate actuation members may be arranged in various ways, and may be embedded in various ways within the mattress. Still further, the elongate actuation members may be manually adjustable, or be electrically adjustable in various ways. Such obvious variants must be considered to be comprised by the invention as defined by the appended claims.
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