DE8900165U1 - Foam body - Google Patents

Description

The invention relates to a foam body for mattresses or cushions. Such foam bodies are cut from one-piece blocks and used on generally flat grids as mattress bodies or in flat cushions. These foam bodies can also be bent to a small extent; unfortunately, this would damage the material.

For many applications it would be advantageous if such foam bodies could be bent more strongly without the material suffering, e.g. in beds with one-piece mattresses where the headboard is to be raised up into a sitting position. This is possible with a foam body according to claim 1.

The foam body according to the invention has relatively thick bending sections, each of which is located between the end of an incision and the opposite side of the foam body. The incisions thus make it easier to bend the foam body.

A 25 Advantageous further developments of the invention are specified in the subclaims.

With the development of the invention according to claim 2 it is achieved that when the neutral fiber of the foam body lies further inside the material during bending, the surface layer subjected to pressure can be easily compressed in the layer plane.

Cuts with a larger cross-section such as a triangular cross-section also have the advantage of good ventilation

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** the surface of the foam body. When the foam body is subjected to vibrations (e.g. when a person turns over on a mattress), the cuts even have an active effect, similar to a hose pump.

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With the further development according to claim 3, an essentially smooth, continuous outer side is nevertheless retained.

With the development of the invention according to claim 4 it is achieved that the foam body in a flat configuration in the direction perpendicular to the top or bottom side has essentially the same strength as a continuous foam body free of incisions.

The development of the invention according to claim 5 facilitates an independent compression of adjacent areas of the foam body, which are separated from each other by incisions.

, J

The development of the invention according to claim 6 is in

Advantageous in view of particularly low sliding friction between adjacent such regions of the foam body and in view of simple production of the sliding layers.

"

With the development of the invention according to claim 7 it is achieved that the foam material does not tear at the corners of the incisions even if the foam body is bent strongly.
30

According to claim 8, the shape of regions of the foam body can be varied locally in a very simple manner.

The further development of the invention in claim 9 is

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■ f. * • 2572.9 - 3 2&agr;·©&Mgr;&Egr; 9 * B ft With regard to good Flexibility of the foam body at in essential in the middle of the same lying neutral

Line of advantage. Ii

_f 05 The further development of the invention according to claim 10 §

ensures good flexibility of the foam body, |

where there is no weakening of the resilient material in the direction perpendicular to the top or bottom.

The invention is explained in more detail below using examples with reference to the drawing. ?J In this drawing: f,

Figure 1t a side view of a foam body for a mattress!

Figure 2t a partial view of a modified foam body In an enlarged scale?

Figure 3t is a view similar to Figure 2, showing a second modified foam body; and

Figure 4t is a view similar to Figure 2, showing a third modified foam body

is.

In Figure 1, a foam body for a mattress is designated as 10. The foam body is made from open-pored plastic material, e.g.

made of soft polyurethane. The foam body is cut from a large block and has a top 12, a bottom 14, side surfaces 16 and end surfaces 18, 20.

35

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23'

In a first area 20" which corresponds to the transition area between the soot part and the middle part of the mattress, cuts 22, 24 are provided in the material of the foam body 10 from the top and bottom. These extend over approximately one third of the thickness of the foam body, so that between the cuts 22, 24 there are webs whose height also makes up one third of the thickness of the foam body 10.

In a further area 26 of the foam body, which corresponds to the transition area between the middle part and the head part of the mattress, further incisions 28, 30 are provided from the top and bottom of the foam body 10, which correspond in distance and depth to the

15 incisions 22, 24 correspond.

In the area corresponding to the head of the mattress 32

of the foam body 10 is from the top and

recessed incisions 34, 36 on the lower side, which

have twice the distance as the incisions 22,

24, 2B, 30 and also have slightly less depth than these.

The incisions 34, 36 locally reduce the firmness of the mattress somewhat, since the material sections lying between the incisions can spring independently of one another. The incisions 22, 24 allow the foot section of the mattress to be swung up relative to the middle section of the mattress. The incisions 28, 30 allow the head section of the mattress to be swung up accordingly.

Figure 2 shows a modified geometry TQr the incisions 28, 30. Each of these incisions has a triangular cross-section, and the remaining surface layer of the foam body thus consists of a plurality of strips with a trapezoidal cross-section, with

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the outer long trapezoidal edges essentially touch. Both the corners of the cuts 34, 36 and the corners of the remaining trapezoidal material sections 33 are rounded, as shown at 40 and 42.

05

The design of the incisions 26, 30 shown in Figure 2 provides even greater flexibility compared to Figure 1, since the material in the webs remaining above the cut-out triangular grooves can be compressed more easily in a direction parallel to the top (or bottom).

In the embodiment according to Figure 2, as well as in the embodiment according to Figure 1, the top and bottom sides of the foam body are equivalent.

Figure 3 shows a modified embodiment in which the incisions 30 are only provided on the underside 14. The incisions 30 are deeper and wider than in the embodiment according to Figure 2. The foam body 10 according to Figure 3 can be bent slightly upwards and slightly downwards. Its upper side 12 is always exactly continuous, even when bent.

/ \ 25 Figure 4 shows a further modified foam body, in which the incisions 28, 30 extend from both the top and the bottom, but are deeper than in Figure 1 and are offset from each other by half a pitch. This results in particularly easy bending both upwards and downwards without shortening the columns of resilient material in a direction perpendicular to the plane of the foam body.

In order to ensure the mobility of the various partial volumes of the foam separated by the incisions 28, 30,

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23-01^09

To improve the friction between the two bodies 10, thin, flat polyethylene tubes can be inserted into the cuts, as shown in A6. The tube walls slide against each other with much less friction than the cut pores of the polyethylene material.

Claims (1)

|- _vi -:>^&Lgr; 2572.9 - 1 - Expectations 1. Foam body for mattresses or upholstery, thereby characterized in that incisions (22, 24, 28, 30, 34, 36) protrude into the foam material from the top side (12) and/or the bottom side (14), which incisions extend over part of the thickness of the foam body. 2. Foam body according to claim 1, characterized in that the incisions (28, 30) are substantially have a triangular cross-section, with the base of the triangles facing the interior of the material. 3. Foam body according to claim 2, characterized in that outer edge portions of the incisions (28, 30) when the foam body is in a flat configuration. 4. A visual aura body according to claim 1, characterized in that the incisions (28, 30) are parallel to each other have crosswinds. 5. Foam body according to claim 4, characterized by between the side winds of the incisions (28, 30) inserted sliding layers (46). 6. Foam body according to claim 5, characterized in that the sliding layers (46) are formed by the superimposed windings of a flattened plastic hose made of low-friction material. 7. Foam body according to one of claims 1 to 6, * ... ' 2572.9 - 2 - ¹ .;, ?3-^0 //p,£ characterized in that the corners of the incisions (28, 30) are rounded (40, 42). 8.j Foam body according to one of claims 1 to 7, characterized in that different regions (20, 26, 32) have incisions (22, 24, 28, 30, 34*, 36) which differ from one another in the spacing of the sequence and/or in their cross-sectional geometry and/or in their depth and/or in their width. 10 9., Foam body according to one of claims 1 to 8, characterized in that incisions (28, 30) are provided in the upper side (12) and the lower side (14) which are aligned with one another. 15 10. Foam body according to one of claims 1 to 8, characterized in that incisions (28, 30) are provided in the upper side (12) and the lower side (14) which are offset from one another by half a pitch 20 are. §900165