Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
  • A61G7/05—Parts, details or accessories of beds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
  • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
  • A61H2201/01—Constructive details
  • A61H2201/0119—Support for the device
  • A61H2201/0138—Support for the device incorporated in furniture
  • A61H2201/0142—Beds

Definitions

• the invention relates to a moving bed with a flexible mattress frame that can be oscillated with the aid of a drive.
• the invention is concerned with a movement bed which is suitable for a certain type of movement exercises.
• rim circle method a movement theory has become known in which an improvement in muscle tone and a physical and psychological relaxation is achieved in that the patient standing, sitting or lying down, various relatively gentle movements such as slowly, alternately lifting the arms or Legs, slight torso of the trunk and the like, either done by yourself or passively carried out by the teacher.
• the object of the invention is to provide a movement bed which makes it easier for the patient to carry out such movement exercises even without the direct involvement of the teacher.
• Movement beds are already known in which a slatted frame forming the mattress frame is moved with the aid of a motor drive in such a way that the rocking movements of a cradle are simulated.
• flexible mattress frames are known, which perform a wavy up and down movement.
• these conventional moving beds are not suitable for therapeutic exercises using the rim circle method.
• the object underlying the invention is achieved in a moving bed of the type mentioned in that the mattress frame oscillates around its Longitudinal central axis can be twisted.
• the torsional movement can take the form of a standing wave, the length of the shaft being twice the length of the
• the movement can also take the form of running torsion waves which progress from the head end to the foot end or in the opposite direction.
• the wavelength is preferably infinitely adjustable.
• the torsion angle amplitude i.e. the maximum angle of inclination of the mattress frame relative to the horizontal in the transverse direction of the bed, is typically of the order of magnitude of ⁇ 3 to ⁇ 5 ° and is preferably also continuously adjustable. For example, a relatively large amplitude of 5 ° can be set when the patient is using the moving bed while awake, while a lower amplitude of approximately 3 ° is selected if the patient wishes to sleep during therapy.
• the period of the torsional movement is usually in the range of 3 to 20 seconds and should also be be continuously adjustable.
• load sensors can be provided at different positions of the mattress frame, for example, in each case at the ends of the slats of a slatted frame, with which it is possible to monitor how the load on the various areas or segments of the mattress frame by the user in the course of the torsional movement changes.
• An evaluation of this data then enables feedback regulation of the amplitude or the local deflection of the mattress frame. If, for example, the patient's muscles are still relatively tense, he cannot fully follow the torsional movement. A decrease in weight load therefore occurs in the lowered parts of the frame, while the load in the raised parts of the frame increases.
• a control device which evaluates the signals of the load sensors reverses the direction of the torsional movement of the bed or reduces the amplitude. In this way, the twisting of the bed is individually adapted to the patient's muscle tone, so that excessive stretch stimuli are avoided and the patient can relax undisturbed.
• the desired torsional movement of the bed can be achieved by very different designs of the mattress frame and the drive mechanism.
• the mattress frame can be designed as a slatted frame in which the ends of the individual slats can be raised and lowered individually or in groups with the aid of hydraulic, pneumatic or electrical actuators are lowerable.
• the supports for the ends of the slats are advantageously elastically cushioned, so that a smooth movement of the mattress is ensured and vibrations of the drive system are not transmitted to the mattress.
• a simple torsion movement in the form of a standing half-wave can be achieved by twisting a frame that is to a certain extent flexible and that receives the slatted frame.
• the cross bars are suspended from the head and foot end of the frame and rotated in opposite directions around the longitudinal axis of the frame with elastic deformation of the longitudinal bars.
• the torsion wave has antinodes at the head and foot ends and an oscillation node in the middle.
• More differentiated movement patterns can be created by arranging another oscillating crossbar in the middle of the mattress frame. In this case, if you move the middle crossbar in phase opposition to the in-phase oscillating crossbars at the head and foot ends, you get a Voilwelle with two vibration nodes. If, on the other hand, you hold the crossbars at the head and foot ends and only oscillate the middle crossbar, you get a half-wave with an antinode in the middle and vibration nodes at both ends.
• the longitudinal bars of the frame are only supported at two or three points in these cases, the bending stiffness of the longitudinal bars results in a uniform, approximately sinusoidal deformation.
• the frame can also have individual segments which are connected to one another in an articulated or elastic manner.
• the mattress frame consists of a plurality of separate, transverse segments that can be moved independently of one another. The segments can be pivoted in the middle and / or supported at the ends and lowered.
• a simple yet variable pneumatic drive can be realized, for example, by storing the ends of the segments or slats on inflatable air bags, which, depending on the type of movement pattern desired, are connected to at least two phase-shifting air cylinders.
• the pistons of the air cylinders can be driven in a known manner by a common swash plate, so that the displacement volume - and thus the amplitude of the torsional movement - can be varied continuously via the angle of inclination of the swash plate.
• the movement bed according to the invention can also be designed as a double bed.
• the drives for the two mattress frames are preferably coupled such that the immediately adjacent Areas of the two mattresses are always deflected in phase.
• Figure 1 is a perspective view of a torsionally deformed mattress.
• Fig a drive mechanism for a slatted frame, with which the torsional deformation of the mattress can be generated;
• FIG. 5 shows a detail of the camshaft according to FIG. 4.
• FIG. A section through a longitudinal spar of a slatted frame with a camshaft drive according to Figures 4 and 5.
• Mattress 10 is ver about its longitudinal central axis 12 sores, that is, the opposite narrow sides 14, 16 of the mattress are inclined in the opposite direction with respect to the horizontal.
• a mattress frame (not shown in FIG. 1), for example a slatted frame which accommodates the mattress 10, is periodically deformed with the aid of a drive mechanism in such a way that the narrow sides 14, 16 of the mattress oscillate in opposite directions about the axis 12.
• the movement of the mattress 10 thus corresponds to a standing torsion half-wave, which has an oscillation node 18 in the middle of the mattress, while the narrow sides 14, 16 of the mattress correspond to the antinodes.
• the full wavelength of the torsion wave is twice the length of the mattress.
• FIG. 2 shows a standing full torsion shaft with two vibration nodes 20, 22.
• the narrow sides 14, 16 of the mattress are moved in phase, and the central region of the mattress is deflected in phase opposition to the narrow sides.
• FIG. 3 shows a drive mechanism for a flexible slatted frame with which the torsion pattern of the mattress shown in FIG. 2 can be generated.
• FIG. 3 For reasons of clarity, only one frame 24 of the slatted frame is shown in FIG. 3, which receives transverse slats, not shown.
• the ends of the slats are supported on horizontal legs of the longitudinal spars 26 of the frame which are L-shaped in cross section. While the cross bars 28 of the frame 24 are designed as rigid profiles, the longitudinal bars 26 are divided into individual segments 30 which are connected to one another by elastic connecting members 32 are.
• the longitudinal bars 26 thus have a certain flexibility overall despite their L-shaped profile.
• the frame 24 rests on three transverse supports 34, which are mounted in an oscillating manner on a shaft 36 which runs fixedly on the bed frame and runs under the longitudinal central axis of the frame.
• the supports 34 are designed as U-shaped brackets so that they permit elastic deflection of the slats inserted into the frame 24.
• the front ends of the supports 34 in FIG. 3 are connected to one another in an articulated manner by two levers 38, 40.
• the levers 38, 40 are each rotatably mounted on the bed frame at their center point 42.
• the lever 40 is moved with the help of an electric motor 44 via a crank drive 46 and a connecting rod 48 in an oscillating manner.
• the amplitude of this movement of the lever 40 can be varied by displacing the crank drive 46, and thus the point of engagement 50 of the connecting rod 48 on the lever 40, in the longitudinal direction of the lever 40.
• the connecting rod 48 When the connecting rod 48 is moved downward from the position shown in FIG. 3 by means of the crank drive 46, the interconnected ends of the levers 38, 40 and the front end of the central support 34 move upwards while the free end of the lever 38 moved down on the left in Figure 3.
• the front longitudinal spar 26 of the frame 24 is thus elastically bent upwards in its central region, while the central region of the opposite longitudinal spar 26 is elastically bent downwards due to the pendulum movement of the supports 34.
• the deformation pattern shown in FIG. 2 results in this way.
• the ends of the longitudinal spars 26 are held rigidly on the supports 34 in such a way that they maintain an essentially horizontal orientation when the central region bends. In this way, there is an approximately sinusoidal deflection of the longitudinal spars and a corresponding wave-like deformation of the mattress 10 placed thereon.
• the longitudinal spars 26 can also be supported point-wise at the ends.
• the deformation pattern of the mattress shown in FIG. 1 can be achieved in an analogous manner in that the frame 24 is supported only at the ends on two supports 34 which are connected to one another by a single lever.
• the mattress frame is formed by a slatted frame, the slats 52 (FIG. 6) of which are raised and lowered at the ends with the aid of longitudinal camshafts 54 (FIG. 4).
• the camshaft 54 has a flexible central shaft 56 on which an elliptical cam 58 is arranged for each individual slat.
• the cams 58 are traversed by two helically wound cables 60 and are oriented in different angular pitches according to the winding of the helix.
• the ends of the cables 60 are fastened to holders 62, which are detachably arranged on the central shaft 56. As shown in FIG.
• the central shaft 56 corrugated coupling pieces 64, which engage in the operating position in a central bore 66 of the respectively assigned cam 58, so that the cam 58 is locked against rotation on the central shaft 56.
• the cams 58 are firmly connected to the cables 60 and can be pulled axially from the coupling pieces 64 with the aid of the cables 60.
• the holders 62 are rotated relative to one another, so that the helix formed by the cables 60 is twisted to a greater or lesser extent. In this way, the relative angular pitches of the cams 58 can be adjusted smoothly and continuously with one hand.
• the cams are locked onto the coupling pieces 64 again using the cables 60.
• FIG. 6 schematically shows the mechanism with which one end of the slat 52 is raised and lowered in accordance with the rotation of the crankshaft 54.
• Longitudinal spar 66 of a slatted frame has a vertical guide pin 68 on which a support 70 for the end of the slat 52 is slidably guided.
• the support 70 is supported by a spring 72 on the longitudinal beam 66.
• the support 70 is supported by one
• the cam 58 is in turn supported by a further roller cage on a leaf spring 76 attached to the longitudinal beam 66.
• the leaf spring 76 is additionally held by a support rod 78 which can be adjusted in the longitudinal direction of the leaf spring.
• the force of the batten 52 is absorbed partly by the spring 72 and partly by the spring 76.
• the cam 58 is rotated by means of a motor engaging the end of the flexible central shaft 56, the support 70 moves up and down periodically.
• the stroke of the support ie the amplitude of the deflection of the slat end, is dependent on the ratio of the spring forces of the springs 72 and 76.
• the hardness of the spring 76 can be varied by adjusting the support rod 78. If the support rod 78 is moved directly under the cam 58, the leaf spring 76 is blocked and there is a maximum stroke.
• the leaf spring 76 is very flexible, so that the rotation of the cam 58 leads almost exclusively to a movement of the leaf spring 76 and hardly to a movement of the support 70.
• the amplitude can be varied continuously with the aid of the support rod 78.
• the amplitude can be set either uniformly for all slats of the slatted frame or individually for each individual slat.
• the cams 58 arranged on the opposite ends of the same slat 52 must be rotated by 90 ° relative to one another, so that the two slat ends execute opposite movements. This can be achieved for all slats of the slatted frame by setting the same twisting of the cables 60 for both camshafts and then rotating one of the camshafts as a whole until the desired phase relationship with the other
• the wavelength of the torsion waves corresponds to the degree of twisting of the cables 60.
• pure transversal can also be used waves or generate any superposition of transverse and torsion waves.
• standing shafts can also be generated if two superimposed camshafts are arranged on each side of the mattress frame, the cams of which roll on each other.
• the total stroke of the support for the slats corresponds in this case to the sum of the strokes generated with the individual cams.
• each slat 52 is supported in the middle by a cylindrical steel spring 80 which rests on a central longitudinal spar 82 of the frame.
• This center support promotes an oscillating movement of the slats 52 during the generation of the torsion waves.
• Another advantage of this central support is that the degree of curvature of the slats 52 can be varied by using the cams 58 to raise or lower the ends of the slats 52 evenly with respect to the longitudinal spar 82. In this way, additional therapeutic effects can be achieved.

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• Health & Medical Sciences (AREA)
• Nursing (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Invalid Beds And Related Equipment (AREA)

Applications Claiming Priority (2)

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Family

ID=6345048

Family Applications (1)

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Citations (2)

Family Cites Families (3)

• 1988
  • 1988-01-11 DE DE19883800496 patent/DE3800496A1/de active Granted
• 1989
  • 1989-01-11 WO PCT/EP1989/000023 patent/WO1989006119A1/de unknown

Patent Citations (2)

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