FI64739B - ANORDNING VID PATIENTSAENG - Google Patents

Description

1 64739

SYSTEM IN A PATIENT BED - ANORDNING VID PATIENTSÄNG

The invention relates to a device according to the preamble of claim 1.

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In patient beds, it is known to use [gas springs, spindle motors, hydraulic cylinders, etc. to change the angle between two articulated planes or rods | which, based on the lever mechanism, produce a moment j by a direct force which changes the angle. It is also known to use rotating devices directly connected to the joint, e.g. an electric motor, a hydraulic motor, a coil spring or j a torsion shaft. However, these solutions are quite cumbersome and complex. With standard drive! 15 in turn, it is not normally possible to adjust the torque that changes the angle between the planes or bars as needed.

Thus, while there may be patients of very different weights in bed, a considerable use of muscle force may be required to change the angle between the planes of the bed.

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Swedish publication SE 391873 presents a solution to a similar problem. In this known device, the adjustment of the torque of the gas spring acting on the furnishing of the back of the chair is arranged in such a way that j

The 25 gas springs are supported at one end by a sleeve I

threaded ak- j Sellin connected to the back of the chair. The support point of the gas spring can be moved with respect to said shaft and the back of the chair by rotating said shaft, whereby said sleeve is displaced with respect to the shaft.

30 Such a solution is quite expensive and, when applied to patient beds, slow and cumbersome.

The object of the invention is to eliminate the shortcomings of the known devices and to provide a new, simple solution for adjusting the angle between the levels of a patient bed, in which different bed loads can be taken into account.

2 64739

The object of the invention is achieved as set out in claim 1 and the claims. By means of the device according to the invention, the adjustment of the above-mentioned torque is easy to perform and the device is also as simple as possible in structure.

The invention will be explained in more detail below with reference to the accompanying drawing, in which - Fig. 1 shows an embodiment of the invention seen from side 10 - Figs. 2 and 3 show sections II-II and III-III of the embodiment of Fig. 1 enlarged.

The drawing shows the adjustment of the angle between the plane elements (tan-15 units) 1 and 2 of the patient bed in accordance with the invention. The driving force, i.e. the power arm 3, in this case is a lockable gas spring, the ends of which are articulated to the articulation member 4 and connecting elements 5 in the planar elements (rods). The connecting elements 5 have an elongate guide-20 groove 8 and a specially shaped recess 11. the cam member 7 in the rotatable shaft member 6 at the end of the arm 3 is locked. The positions of the articulation points of the parts 4 and 5 and the arm 3 are determined by the required angle adjustment range and torque. The magnitude of this moment between the planar elements 1 and 2 (rods) caused by the force arm 3 can now be changed by rotating the shaft member 6 180 ° by means of the torsion arm 10 and then changing the angle between the plane elements (rods) so that the end of the shaft 6 and thus the arm 3 moves. suh-30 tee to another position. After the desired movement of the power arm 3, the shaft member 6 is rotated again 180 °, whereby the cam member 7 locks the shaft member 6 with respect to the connecting elements 5 and unintentional adjustment of the torque of the power arm 3 is prevented. The solution according to Figure 1 provides three different torque ranges.

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Claims (5)

A device in a patient bed for changing the winkin between interconnected planar elements (1, 2), comprising a pivot arm (3) interconnected to the planar elements (1,2), for example a power cylinder which is pivoted at one end at the first plane element (1) or 64739 a means (4) attached thereto, characterized in that the second plane element (2) comprises a connecting element (5) provided with a guide lock (8), that the force arm (3) is provided. with means (6, 7) for supporting 5 and for displacing the force arm (3) along the guide pair (8), that the control pair (3) is so formed and shaped that displacement of the force arm (3) in the control pair (8) causes a change in the magnitude of the momentum of the force arm (3) for changing the winkin between the planar elements (1, 2), and that the device further comprises means for reading the force arm (3) in the control pair (8) in the desired position. 2. A device according to claim 1, characterized in that the guide pair (8) is formed to comprise support surfaces (9) for the momentum of the force arm (3), and that the support means (6, 7) for providing the reading of the force arm (3) are pivotally interconnected to the end of the support arm and so shaped that they allow displacement of the force arm (3) along the guide pair (8) only in a certain pivot position, with at other pivot positions 20 of the support means (6, 7) the support surfaces (9) together with the support means (6). , 7) are arranged to prevent mutual movement between the force arm (3) and the connecting element (5). ! in 3. A device according to claim 2, characterized in that the supporting means (6, 7) comprise a shaft member | 2 (3 (6) and a cam member (7)), that the shaft member (6) is arranged 4 to be supported and displaced along the guide pair (8) and that the connecting member (5) has a recess (11), which determine the support surfaces (9) 4. An arrangement according to any of the preceding claims, characterized in that the connection element (5) consists of two disc-shaped bodies on both sides of the power arm (3).