WO2007147472A2

WO2007147472A2 - Matress

Info

Publication number: WO2007147472A2
Application number: PCT/EP2007/004542
Authority: WO
Inventors: Markus Veutgen
Original assignee: Recticel Schlafkomfort Gmbh
Priority date: 2006-06-22
Filing date: 2007-05-23
Publication date: 2007-12-27
Also published as: WO2007147472A3; DE202006009902U1

Abstract

The invention relates to a foam mattress (M) which has a lying surface (L), which is predetermined by two longitudinal sides and two transverse sides, and a base surface (G), which is located beneath the lying surface, and also has a layered construction made up of at least two foam layers (1, 2, 3) which meet at an associated boundary surface (4, 5) and of which the foam materials differ in respect of compressive strength. This foam mattress, furthermore, is characterized in that the at least one boundary surface (4, 5) is arranged between the lying surface (L) and the base surface (G) and is configured such that the thicknesses of at least two of the layers (1, 2, 3) change, at least over certain sections, in the direction predetermined by the longitudinal sides.

Description

mattress

The invention relates to a foam mattress. Mattresses are upholstery, which is usually placed on slatted frames to allow for comfortable lying and sleeping. The combination of mattresses with matching slatted frames is called bedding systems. The mattress core made of foam, latex or natural products is o.a. with a Drellbezug. sheathed, which is quilted depending on need with sheep wool, fleece, cotton, wild silk or horsehair. Covers of comfort mattresses are made of drell, three-dimensional elastic fabrics, such as terry or multi-layered jersey.

Modern mattresses are often divided into three to seven lying zones, which should meet the different needs of the individual body regions for support. Mattresses are generally differentiated in: spring mattresses with the subspecies pocket spring mattresses

Bucket pocket spring mattresses Latex mattresses with the subspecies

Natural latex mattress

Layer latex mattress foam mattresses with the subspecies

Cold foam mattress viscoelastic mattress Natural mattresses with the subspecies

futons Waterbeds Airbeds

Foam mattresses have long been right in bad reputation. They were considered cheap goods with poor durability. This has changed fundamentally in recent years due to new developments. Foam mattresses today usually consist of a polyurethane cold foam mattress core. Its qualities and properties depend i.a. From the density (RG), the compression hardness, the method of manufacture and the incorporated profiles, hollow chambers from.

By volume weight is meant the kg weight per 1 m ^{3 of} foamed raw material. The compressive strength is the force that must be applied to push in a block of foam about 120 cm high by 40%. The lower the compression hardness (kPa), the softer the foam.

The advantages of the foam mattress are the very good adaptability to body contours and slatted frames, the absolute noiselessness, the excellent point elasticity, the very good suspension and recovery behavior when changing position and the low susceptibility to mite infestation with appropriate care and the long service life. A disadvantage of the known foam mattresses that good qualities are relatively expensive. This is u.a. The fact that the incorporation of profiles and hollow chambers in order to give the mattress zone-wise different behavior, for example for the shoulder or pelvic zone, is expensive.

Another type of foam mattresses are the viscoelastic mattresses. These have the property of conforming to the body of the one resting on them. This adjustment is made by the fact that the body heat allows sinking into the mattress, which is then after the change of the lying position delayed returns to the original shape. This has certain advantages depending on the frequency of change of sleeping position, such as the particularly good and zone-dependent support, but occasionally also some disadvantages. People who are prone to perspiring feel that they are too warm due to the heat build-up in the resulting coolers. Furthermore, such mattresses are relatively expensive to manufacture. The invention is therefore based on the object to provide a comparatively inexpensive to manufacture and / or improved in terms of reclining foam mattress.

This object is achieved by the reproduced in the first claim protection mattress. Advantageous embodiments are the subject of the dependent claims.

The foam mattress according to the invention has a lying surface defined by two longitudinal and two transverse sides and an underlying base surface. In general, the longitudinal or transverse sides and the lying and base surface are each arranged parallel to each other. The dimensions of the mattress, for example, correspond to those dimensions that have become common. Thus, the mattress has a width of for example 70, 90, 100, 120, 140, 160 or 200 cm, a length of 140, 180, 190 or 200 cm and a thickness of 12, 14 or 15 cm. The mattress also has a layer structure of at least two foam layers adjoining one another in an associated boundary surface, whose foam material differs in terms of compressive strength. The compressive strength is the force that has to be applied in order to compress a foam ingot of approx. 120 cm in height by 40%. The compression hardness is determined according to DIN 53577 or ISO 3386.

The lower the compression hardness (kPa), the softer the foam. The layer structure is integrated, for example, in a mattress forming foam block. The at least one boundary surface is arranged extending between the lying surface and the base surface and is configured such that the thicknesses of at least two of the layers change at least in sections in the direction predetermined by the longitudinal sides, ie in the longitudinal direction of the mattress. For example, the interface runs along the mattress in plateaus of different heights. As a result, the mattress in the various zones along the longitudinal direction of the mattress, depending on the thickness of the relevant layer on different properties in terms of compressive strength and thus in terms of support or immersion depth of individual body sections of a person lying on. As a result, in a lateral lying position of the person lying the course of the Vertebral column have a substantially straight course when viewed vertically from the back. In a supine position or prone position of the person lying in the support area of the body, a particularly uniform pressure distribution and thus a particularly pleasant feeling lying can be achieved. Furthermore, such a lumbar support can be achieved. The average person skilled in the art is able to adjust the position of the interface, ie the thicknesses of the layers and the required compression hardnesses according to the desired degree of hardness of the mattress, the average body weight or the average body sizes in a few experiments. This can advantageously account for the manufacturing process of the mattress more expensive profiling and hollow chambers in the mattress material. The mattress can be made comparatively inexpensive. The layers are glued, for example, along the interface.

The at least one boundary surface is preferably configured such that the thicknesses of the at least two layers change continuously in the direction predetermined by the longitudinal sides. This achieves a smooth transition in the zones of the longitudinal direction of the mattress. Lying is perceived as particularly comfortable, since discontinuous transitions of the compression hardness of the entire layer structure are avoided.

In a further advantageous embodiment, the at least one boundary surface is designed to be wavy in a longitudinal section of the foam mattress. It has been found that this waveform is particularly suitable because the body silhouette is best approximated by the waveform. It is the expert in a few attempts to adjust the curvatures and position of the shaft according to the desired degree of hardness of the mattress, the average body weight or the average body size in a few experiments. For example, the shaft has depressions in areas where the body height average associated with the length of the mattress is positioned the shoulder of a person lying down.

In a further advantageous embodiment, at least one layer consists of a foam whose elasticity increases when heated to body temperature, preferably in perceptible for the person lying around. This so-called "viscoelastic" or "thermo-active" foam, for example Sensipur ^® has the property of conforming to the body of the person resting on it. This adjustment is made by the fact that the body heat allows a greater sinking into the mattress, which then returns after the change of lying position retarded to its original shape. As a result, a particularly pleasant reclining feeling can be caused when the person is resting.

Because the layer is comparatively thin compared to pure "viscoelastic" mattresses, the mattress can be manufactured particularly inexpensively, but at the same time the advantages of the "viscoelastic" foam with regard to lying down can be maintained.

In a further advantageous embodiment, at least one layer consists of an open-pore foam. As a result, the breathability of the layer structure can be improved. The feeling of lying is increased because sweat can be removed from the dormant. In combination with the aforementioned viscoelastic layer, its disadvantage, namely that persons prone to sweating may find that these are too warm due to the heat build-up in the resulting coolers in purely viscoelastic mattresses, can be substantially eliminated by the open-cell foam.

According to a further advantageous embodiment, the layer structure has an upper, the lying surface forming foam layer and a lower, the base layer forming, wherein the upper layer comprises a foam having a lower compression hardness than the foam of the lower layer. For example, the lower layer is a polyurethane cold foam brand Bültex ^® .

On the one hand, a stable, wear-resistant support on a slatted frame is achieved by the harder, lower surface layer forming the base surface. On the other hand, in particular in the areas where it is comparatively thick, or where the upper, in comparison softer, layer is thinner, the lower layer provides for a particularly pronounced support of the relevant body sections. In a further advantageous embodiment, the foam of the upper layer is a foam whose elasticity increases when heated to body temperature (viscoelastic). It has been found that a close-bodied arrangement of the viscoelastic material is particularly advantageous due to the better heat input into the viscoelastic foam.

In a further advantageous embodiment, the upper foam layer in a shoulder zone and / or pelvic zone is comparatively thick in the direction predetermined by the longitudinal sides in relation to the remaining zones of the foam mattress. As a result, in a lateral reclining position of the recumbent person, the course of the spinal cord has a substantially rectilinear course when viewing the spine. In a supine position or prone position of the person lying in the support area of the body on the bed a particularly uniform pressure distribution and thus a particularly pleasant feeling lying is achieved.

In a further advantageous embodiment, the layer structure further comprises a middle layer of an open-pore foam material adjoining the upper and lower foam layers. It has surprisingly been found that by the arrangement of the open-pored layer between the upper softer and the lower harder layer a breathability is achieved, which causes a particularly pleasant feeling of lying. This is partly due to the fact that the air can easily flow into the mattress via the exposed side surfaces of the mattress and, due to convection currents, a particularly good breathability is achieved.

Further features, details and advantages of the invention will become apparent from the claims and the following drawing, in which an embodiment of the foam mattress according to the invention is shown, without limiting the invention thereto. It shows:

Fig. 1 is a side perspective view of the preferred embodiment of the foam mattress according to the invention. Fig. 2 is a side view of the preferred embodiment with a on the

Foam mattress resting person.

The foam mattress (M) has two parallel transverse sides and two parallel longitudinal sides, between which above a lying surface L and below a bottom surface G is specified. The foam mattress M has three layers 1, 2 and 3. All layers are made of polyurethane cold foam. The layers 1, 2, and 3 differ in their compressive strength. It is a lying surface L forming and a comparatively soft upper foam layer 1 is provided. This is a foam whose elasticity increases when heated to body temperature, ie a so-called "viscoelastic", "thermoactive" foam. Under the upper layer 1 is an open-cell foam layer 2 to increase the breathability. The interface 5 between the upper and middle layers 1 and 2, respectively, extends undulating in the longitudinal direction of the mattress M. The middle layer 2 adjoins down to a lower layer 3 of comparatively hard Bültex ^® foam. The intervening interface 5 is also wavy and nearly parallel to the interface 4. The waveform of the interfaces 4 and 5 is selected so that the upper foam layer 1 in a shoulder zone 7 and leg zone 6 in the direction predetermined by the longitudinal sides against the remaining zones of the Foam mattress M is comparatively thick and the lower layer 3 in the shoulder zone 7 and leg zone 6 is comparatively thin.

The supine position of a lying person P on the foam mattress according to the invention is shown in Fig. 2, which corresponds to the embodiment shown in Fig. 1, so that the statements made to Fig. 1 are not repeated but merely supplemented. In the contact area of the body of the person P on the lying surface L is achieved by the wave-shaped configuration a particularly uniform pressure distribution and thus a particularly pleasant feeling lying and a lumbar support. The waveform of the interfaces 4 and 5 is selected so that the upper foam layer 1 in a shoulder zone 7 and leg zone 6 in the predetermined direction by the longitudinal sides relative to the remaining zones of the foam mattress M is comparatively thick and the lower layer 3 in the shoulder zone 7 and Leg zone 6 is comparatively thin. Especially in the see the shoulder zone 7 and the leg zone 6 located pelvic zone 8, the upper layer 1 is comparatively thin, so that it comes here due to the comparatively thick, therefore close to the body and also less elastic lower layer 3 to a pelvic or lumbar support. The body of the person P dives here comparatively small in the mattress M. Also in the head zone 9 of the person lying, the lower layer 3 is comparatively thick and the upper layer is comparatively thin. Therefore, in the head zone 9, the lower, less elastic lower layer 3 is arranged comparatively close to the body and there is support for the head of the person P. Furthermore, in a lateral reclining position of a lying person, not shown, the course of the spinal cord when viewed vertically of the back on a substantially straight course.

LIST OF REFERENCE NUMBERS

1 upper layer of viscoelastic foam

2 middle layer of an open-pored foam 3 lower layer of a cold foam

4 wavy interface

5 wavy interface

6 leg zone

7 shoulder zone 8 pelvic zone

9 head zone

L lying area

G base area

Claims

claims:

1. foam mattress (M) having a predetermined by two longitudinal and two transverse sides lying surface (L) and an underlying base (G), further comprising a layer structure of at least two, in an associated interface (4, 5) adjacent foam layers (1, 2, 3) whose foam material differs in terms of compressive strength, characterized in that the at least one boundary surface (4, 5) between the lying surface (L) and the base (G) is arranged to run and is configured so the thicknesses of at least two of the layers (1, 2, 3) change at least in sections in the direction predetermined by the longitudinal sides.

2. foam mattress according to claim 1, characterized in that the at least one boundary surface (4, 5) is designed so that the thicknesses of the at least two layers (1, 2, 3) change continuously in the direction predetermined by the longitudinal sides direction ,

3. foam mattress according to one of the preceding claims, characterized in that the at least one boundary surface (4, 5) in the direction indicated by the longitudinal sides direction wavy.

4. foam mattress according to one of the preceding claims, characterized in that at least one layer (1) consists of a foam whose elasticity increases when heated to body temperature.

5. foam mattress according to one of the preceding claims, characterized in that at least one layer (2) consists of an open-cell foam.

6. Foam mattress according to one of the preceding claims, characterized in that the layer structure has an upper, the lying surface (L) forming foam layer (1) and a lower, the base surface (G) forming layer (3), wherein the upper layer (1) has a foam having a lower compression hardness than the foam of the lower layer (3).

7. foam mattress according to claim 6, characterized in that the foam of the upper layer (1) consists of the foam whose elasticity increases when heated to body temperature.

8. foam mattress according to claim 6 or 7, characterized in that the upper foam layer (1) in a shoulder zone (7) in the direction predetermined by the longitudinal sides direction relative to the remaining zones of the foam mattress (M) is comparatively thick.

9. foam mattress according to one of claims 6 to 8, characterized in that the upper foam layer (1) in a basin zone (8) in the by the

Longitudinal sides given direction opposite the remaining zones of the

Foam mattress (M) is comparatively thin.

10. foam mattress according to one of claims 6 to 9, characterized in that the layer structure further comprises a to the upper and the lower foam layer

(1, 3) has adjacent, middle layer (2) of an open-cell foam material.