FI62945C - SITT- ELLER LIGGUNDERLAG - Google Patents

Description

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Patent and Registration Office (44) Date of publication and other hearings

Patent · och registerstyrelsen 7 Arattksn uttsgd och utUkriftwi puMlurad 31.12.82 (32) (33) (31) Pyydetty Kuoik «ui — l« ftrd prlorim 27.07 · 76

Denmark-Danmark (DK) 3368/76 (71) (72) Hugo Martinus Hansen, Digestykket 72, 2730 Herlev,

Flemming Dahl, Belmannsgade 31 *, 2100 K ^ benhavn, Denmark-Danmark (DK) (7I4) Leitzinger Oy (5) +) Seating or sleeping pad - Sitt- eller liggunderlag The present invention relates to a sitting or sleeping pad with a divided upper surface. as surface members connected to the actuator in such a way that some of the members move downwards from the initial position to a lower position and then upwards to the initial position, after which the other members move downwards and then upwards, after which this section is repeated.

Such platforms are used for persons who, for example, have to constantly sit or lie down due to a stroke and are therefore prone to sedation or bed sores, with the caregiver assisting the person concerned at appropriate intervals by changing his or her position.

A base of the quality shown at the beginning is known from Danish patent publication 133 232, which is directed against a seat or sleeping base with surface members mounted alternately on up and down movable bars. These members are arranged so that the lowered member is surrounded by four members in the initial position, which does not cause sufficient lateral movement of the bases, since the variation is the transition from one point to the next. Therefore, the massage effect achieved is not sufficient to give the desired 2,62945 circulation, which is a prerequisite for the treatment of sitting or bed sores. Furthermore, the surface pressure is relatively high, because when lowered, 50% of the support is removed and the remaining supports receive the body weight.

The object of the present invention is to eliminate said drawbacks and to improve known seating and sleeping pads, and this object is achieved by arranging the members in such a way that each lowered member is in the initial position surrounded by six members, all spaced apart from each other and the depressed central member. and that the individual surface members of each such group are arranged in rows and connected to each other by a closed hydraulic system. Thus, pressing down at least one member in a row causes the other members in the same row to rise.

This firstly results in a reduction in surface pressure, as only 25% of the support is lowered, so that the remaining 75% can support body weight. This means relief for the person sitting or lying because the surface pressure rises only slightly. Furthermore, this placement of the members gives a much greater variation in the support pattern between the counts, as the 25% that is counted down varies in the range of the remaining 75% so that three counts down occur between each initial period. This large variation implies a markedly improved massage effect, which means that the person suffering from wounds expects to be completely healthy from the wounds when using this support.

It can be stated that each organ in its initial position can adapt to the body and, in addition, the surface pressure can be equalized so that the body becomes completely evenly supported over the entire surface of the surface members. This compensates for the variation in surface pressure and provides great relief for a person whose protruding parts, in particular, become less stressed, who have hitherto had to carry a disproportionate weight when using known supports, resulting in wounds.

The invention will be explained in more detail below with reference to the accompanying drawings, in which: 3 62945

Figure 1 shows a top view and a sectional view of the seat at the two base stations.

Figure 2 shows a partial section of the rod with its support members.

Figure 1 shows a top view of an example of a seat or bed base. The individual support members 1, 2 are mounted on longitudinal or transverse bars I, II, III, IV, the members of which can be moved from a starting position where all support members are at the same height, via a drive device (not shown). This drive moves the bars in such a way that every fourth bar, for example all the bars marked with the reference number I on the left in Fig. 1, move downwards relative to the starting position, while the other bars remain in the same plane.

In this case, a pattern is provided formed by a circuit of six members 2 centered around the lowered member 1. Such a pattern is shown by a dotted line in Fig. 1, the lowered member 1 of the above-mentioned figure is crossed out. By raising the bars marked with reference number I and lowering, for example, the bars marked with reference number II, see the right-hand side of Fig. 1, the pattern moves in both the longitudinal and transverse directions. Thereafter, by lowering the bars indicated by reference numeral III and then lowering the bars indicated by reference numeral IV, the support thus moves in a smooth and suitable manner, which ensures the desired massage effect.

The drive device can be of a known quality, such as a hydraulically operated piston-cylinder device or a bellows device or mechanically, for example by means of lever arms or a cam wheel, or an electromagnetically operated device.

The distance 3 between the different members 1, 2 is the same everywhere as shown in Fig. 1. This results in an even distribution of support points.

The individual support members consist of a cup-shaped lower part 7 fixed to the rod 4. The lower part is fitted with a rear upper part 8, 4 62945 which can be formed by an air-filled closed ball member with rear walls, leveled at the top 9 so that the support members the member can receive pressure over the entire support surface.

To ensure the desired even distribution of body weight over the organs, the rods are arranged as shown in Figure 2. The rods I-IV have holes provided with cylinders 6, each of which has a piston 5 with a piston rod 4 to which the members 1, 2 are attached. The cylinders are filled with hydraulic oil so that at start-up all the members have the same distance A from the rods, the pistons 5 being, for example, in the middle of the cylinders 6.

In order to ensure that no liquid seeps out of the cylinders 6 around the pistons 5, a well-known, for example rubber, liquid-impermeable, retaining membrane can be attached to the inner surface of the cylinder wall. This diaphragm rests against the underside of the piston and can follow the upward and downward movement of the piston without preventing this. This ensures that this part of the system is completely liquid-tight and at the same time that the piston can move freely up and down, since the piston does not have to be provided with a sealing ring, such as an O-ring.

When some organs are depressed, for example, when a person is sitting on a platform, the oil is compressed into other cylinders, causing their organs to rise against the body. In this case, the hydraulic system is closed. In this case, the organs mounted on the same rod receive the body weight and the surface pressure becomes reduced to a hitherto unknown low level. In practice, it has been found that when a body weight of 2 to 70 kg has a surface pressure of about 35 g / cm in the seated position, the surface pressure decreases to about 2 to 10 to 15 g / cm with the device according to the invention, with a seating capacity of between 500 and 600.

In another embodiment, each member of the stationary, reversing cylinder is formed by a so-called roller film, which may be filled with air or liquid. To form a closed system, all the membranes in the series, which correspond to the members of one rod, are connected, for example, by means of a hose or pipe. When the upper surface of the membrane is loaded, a support is formed and the membrane is pressed in, while when the effect ceases, the upper surface and thus the whole body rises. This is achieved