DE2038548A1 - Adjustable bed - Google Patents

Description

Patent attorneys Dipl.-Ing. K. Scitieschke _

8 Munich 1Ϊ lawyers ' file: 7241

Elisabethstrasse 34

trioteam a / s

/ Denmark

"V e r st e 11 b a r e s Be tt"

The invention relates to an adjustable bed with an arbitrarily designed floor, which in a substantially flat, horizontal position, i.e. the normal resting position, into an essentially flat end position with the footrest part raised, the so-called Trendelenburg position and in a second end position with an inclined or vertical back support part and angular position of the remaining parts of the bed base, i.e. Inclined seat part and sloping footrest part to support the Legs and knees, as well as in appropriate intermediate positions, is adjustable. The bottom of the bed, which consists of a flexible piece or can be made of three articulated parts, lies on one longitudinal three-part frame, with articulated connections are provided between the parts so that it is at the Cross axes is foldable. In addition, there are manually operated motor-operated parts for adjustment in the individual layers provided.

009887/0211

In known beds of this type, such as those used in hospitals, rest homes, sanatoriums, clinics, etc. several different adjustment parts have to be operated in order to bring the bed into the desired positions, and as a rule these cannot be operated by the person lying in bed, since in practice they are too actuating parts outside the bed on the height of the bed base or below its level or on a special Switchboard must be installed next to the bed.

The object of the present invention is to provide such a bed, in which the adjustments via a single mechanism controlled only by an actuating part can be carried out.

To solve this problem, the back part of the three-part frame is in the bed according to the invention by means of a joint rotatable but indestructible with a rigid support frame or a support part attached to the frame near its junction with the seat part, the three-part Frame also movably provided on one or two adjustment parts rotatably connected to the frame Support elements stored. The seat part is rotatably connected to the back part via a short lever and is supported loosely on a support element attached to the support frame, and the foot support part rests on a support element of a Adjustment part, which is also rotatably fastened to the support frame, with parts also for exerting a tensile force are provided for rotating one of the adjustment parts.

In its normal rest position of the R _a is thus hmen at five places on each side supported, that is, at two locations of the back portion by the adjustment at the head end of the bed and the rigid support frame, fixed support member close to the

000887/0211 ^{/ 3}

Connection between back part and seat part by means of a support element in the middle of the seat part and by a support element of a cooperating with the foot support part Adjustment part. Since the adjustment in the different positions by turning only one adjustment part on one or at the other end, all movements can be made by a single mechanism Actuation the bed is moved smoothly and continuously from one position to the other.

According to one embodiment of the bed according to the invention, the support part for the back part is adjustable on the rigid side Support frame attached} This allows the angle between the seat part and the footrest part to be bent Adjust the position with a vertical or inclined back section.

According to a further embodiment, the seat part and the footrest part of the three-part base have close to their Connection point fittings that converge downwards and at their lower end a pin on the one hand and a curved slot for engagement for the pin on the other hand. This makes the rotary motion of the joint can be limited so that the two leile are aligned stay when the footrest part is brought from its normal rest position into the Trendelenburg position, and completely in general, there is a better strength of the construction.

The adjustment parts are preferably in the shape of a triangle formed, one side of which is much shorter than that on the other two sides, and rotatably attached to the rigid drag frame at one vertex of its short side is, with pulling parts attached to the other vertex of its short side. This makes fastening extremely easy a pull rod or pull chains that interact with the adjustment parts, the exerted pulling '

009887/0211 '

-4- 2Ü385A8

force is almost fully exploitable when the adjustment parts are rotatably arranged so that the short side of the triangle pivots about a vertical position.

According to a preferred embodiment, these are cooperating with the back part and possibly also that provided with a fitting in the form of a segment of a circle that interacts with the foot support part, wherein the curved side of the segment forms an unwinding path for the pulling part. Because of this the exercised Tensile force used to the maximum in all positions of the actuated adjustment part.

The adjustment movements are preferably carried out via a reversible electric motor, the power transmission e.g. takes place via spindles, racks or chain gears. In a preferred embodiment of the invention In bed, the train that actuates the adjustment parts is exerted via a cross member, at the ends of which there are tensile parts extend loosely through openings and are secured by a nut, pin or the like, the cross member via a spindle which cooperates with the reversibly rotatable spindle Screw connection is movable. This results in a very simple way of operating the adjustment parts, since a movement of the cross member to one side from its central position moves the bed into the Trendelenburg position brings and to the other side in the angled position. Reversing the direction of rotation of the Motor and thus the spindle acting on the cross member can be done via switch, which is from the cross member in its End position can be actuated, or crawled on to others Wise so that to move the bed to the desired position only the operation of the switch to start the Iiotor and to switch off after reaching the desired bed position.

009887/0211 ^{/ 5} '

Conditions similar to "Use of a motor are present." even before when the bed is adjusted to the various positions by hand. In this case the Rotary movement: a handwheel, e.g. transferred to the spindle via a worm gear.

The bed according to the invention is described below with reference to the exemplary embodiment shown in the accompanying drawings described in more detail.

In the drawings shows:

Fig. 1 is a side elevation of the bed according to the invention, but with all parts omitted which are not of immediate importance to an understanding of the invention;

Fig. 2 is a side elevation of the bed in the so-called trend narrow division, i.e. with opposite the head end of the raised foot end;

Fig. 3 is a side elevation of the BeUes in its second End position, with a steeply inclined back section, the remaining parts to support the hollows of the knees, legs and the Buttocks take an angular position;

Figure 4 is a bottom plan view of the bed.

As a support frame for the bed base (not shown) The bed according to the invention has a frame made up of three parts on, namely the crouch support part 10, which supports the buttocks Part, in the following seat part 12, and the footrest part 14. The three Bahnrenteile can be made of L-beams made of iron or other metal or also from other carriers, whereby

009887/0211

/ 6

they can be constructed as three rectangular frames and if possible, each of these frames is equipped with a rigid floor or is connected to it in one piece is. These three base parts make up the entire bed base. To the frame 10,12,14 around can lateral and front wall parts (not shown) for the bed be arranged, as well as legs or other, if possible carrying parts provided with wheels.

The supports surrounding the back part 10 each have an extension 16 which, as will be explained later is, forms a small lever arm that is rigidly connected to the carrier or formed in one piece with this is so that the beams along their entire length from the head end 18 of the frame to the extreme end of the extensions 16 are rigid. Via joints 20, preferably a pivot point on each side of the frame (which is also can be a continuous axis) are the extensions 16 with the supports surrounding the seat part 12 swiveling TBc-bound. This is the back part and the Seat part can be pivoted against one another at this point about an axis running transversely to the longitudinal direction of the bed.

The supports encompassing the seat part 12 of the frame are preferably pivot points via joints 22. both sides of the Frame, or also a continuous axis, connected to the carrier comprising the footrest part of the frame, so that the footrest part and the seat part mutually at this point about an axis transverse to the longitudinal direction of the bed are pivotable. The connection resulting from the joints is a limitation for the pivoting movement intended. This limitation can be implemented in a variety of ways, and one or both of them Sides or be attached between the sides of the frame, the boundary is preferably on the respective side supports attached on both sides of the frame. In the illustrated embodiment, the limitation consists of fittings

009887/0211 / 7-

pen 24 and 26, which on the side supports of the seat part or the foot support part 14 are attached. The fittings 24 and 26 overlap at one located below the frame Job. One fitting has a curved slot 28 and the other a pin 30, which in the slot 28 is engageable and movable. The frame takes the normal resting areas shown in Fig. 1 or the one shown in Fig. 2 an end position (Trendelenburg position) -, the pin 30 is in its one end position: in the drawing its extreme left position) in the slot 28. The parts 24, 26, 28, 30 thus prevent the foot support part 14 from creeping up over the seat part 12 rotates, which on the one hand ensures that the two parts extend in alignment and on the other hand prevents that they form an angle with a vertex downwards.

In the second end position shown in Fig. 3, which corresponds to the seated position of a bedridden person, the pin 30 is located at the opposite (in the drawing in the far right) end of the slot 28, and the parts 24, 26, 28 and 30 prevent that in the illustrated embodiment, the angle between the seat part and the footrest part is greater than the length of the slot, ie not greater than shown in FIG. 3 in the illustrated length. The angle between the two parts is always to be understood as the angle between one of the two parts and an extension of the other, as indicated in FIG. 3 by the angle ". The angle (A is, that is, 0 °, in the positions shown in FIGS. 1 and 2 and corresponding intermediate positions of the bed. However, it assumes a value between 0 ° and its maximum value, for example in a position between that shown in FIG normal rest position and the end position according to FIG. 3. However, it is not necessary to limit the end position by the slot 28, since the limitation can also take place via curved paths that interact with stationary stops.

009887/0211

2038549

The frame 10, 12, 14 is supported by several parts to be described below on a support frame 40. This support frame can e.g. be provided in the form of an elongated, relatively wide plate on both sides of the bed, the plates one below the other Are connected by corner rails, rods or the like. The support frame 40 is shorter than the one over the ends of the support frame also extending frame 10, 12, 14 and can rest on the floor or rest on the floor Disguises, legs oda? Be provided with wheels.

P In the illustrated embodiment, the support frame has an upwardly extending fitting 42, the is provided at its upper end with a pin 44, which in turn with a pivot bearing in a rigid on a side support of the back part 10 attached fitting 46 cooperates. The pin can also be on the fitting 46 and the Pivot bearings can be provided in the fitting 42, and the resulting hinge connection can also be shaped as desired an axis extending from one side of the back part 10 to the other. It is crucial that on this point between the frame 10, 12, 14 as a unit on the one hand and the rigid support frame on the other hand, a joint against ben is. The axis of rotation for the entire frame 10, 12, 14 during its movement from the position in FIG. 1 into the position in Fig. 2 is determined by the pin 44. The horizontal distance between the axis determined by the pins 44 and the axis of rotation of the joint 20 should be very small, e.g. 1-2% of the bed length, with the distance between these two Axes of the short lever arm 16 is.

At the head end of the support frame, a fitting 50 is rotatably attached to a pin or axle connection 48 on both sides. The two fittings 50 are rigidly connected to one another, for example via supports. Each fitting 50 carries on its upper one

/ 9 009887/0211

2G38548

At the end of two support elements 52 and 54 ·, both of which are in the normal resting position according to Pig. 1 against a horizontal Qjä.1 (e.g. the horizontal part of an L- or U-shaped Carrier) the side members of the back part 10 of the frame 10,121,14 rest. With the Abstütziernenten 52,34 it can e.g. small rollers or sliding shoes made of nylon, for example, or from one Bed side to the other continuous rollers. Is the bed in the Trendelenbi | ug position (Fig. 2) or in a position between this and the normal rest position (IFig. 1), then the support elements 54 are against the Side support of the back part 10, and in the position shown in Fig. 3 or a position between these and in the normal rest position, only the elements 52 rest against the side supports.

At the foot end of the support frame, a fitting 60 is rotatably fastened on both sides on a pin or an axle connection 56. The two -öescüäge 60 are rigidly connected to one another, for example via supports. At its upper end, each B _e strike 60 a supporting element 62 which can be designed just like the support elements 52,54 and from below against a horizontal portion of the sides <jes Fußstützteils 14 abuts the frame 10,12,14 forming carrier . There is always contact between the support elements 62 and the Fußgtutzteil 14 of the frame.

As already mentioned, the frame 40 is shorter than the frame 10, Ί2, 14 and, in the exemplary embodiment shown, is arranged centrically or in the weasitlichen centrically to this. In (in the middle of the support frame 40 on both sides a fitting 66 is attached, which extends only a little "beyond the frame 40 and has a support element 68 at its upper end, for example a roller or a cylindrical sliding shoe. The support elements 68 can also extend from one side of the bed to the other

009887/0211 / 10

extend and lie from below against the bottom side the side support of the seat part 12 of the frame 10, 12,14 when the bed is in the normal rest position (Pig. 1) or in. Its end position according to Fig. $ as well as in positions located between these two layers. The support elements thus serve as an ISpp point for the seat part 12 during adjustment of the bed from its normal rest position to the angular position (Fig. 3) or vice versa. How steep the seat part 12 increases in the bent position, therefore depends on the ratio of the lever length between the joints 44 and 20 to the horizontal distance between the hinge 20 and the. Support element 68 from. Of course the steepness will too determined by the angular division of the male part 10, but by appropriate choice of the ratio between the at both distances 44-20 and 20-68 you can adjust the angle of the Reach seat part 12. The position of the seat part and the fitting 60 determines the angle between the footrest part and the seat part 12, which, however, by the parts 24,26,28,30 is limited.

In the embodiment shown, the fitting 66 is rigidly connected to the support frame 40, and therefore this is the case Support element 68 does not rest against the seat part 12 when the Bed assumes the Trendelenburg position (Fig. 2). The fitting 66 or the Abdütζelement 68 can, however, also vertically be adjustable, e.g. by means of a spring, so that the back section as well, during the • Trendelenburg position of the bed support (Fig. 2). The same effect can also be achieved when the fitting 66 can be adjusted in the longitudinal direction from the position shown in the middle towards the head end 18 of the bed frame is. By such shifts, the angle between the seat part and the foot support part at a given position of the back part can be changed ..

/ 11 009 887/021 1

The fittings 50 and 60 are on above the turning centers (Joints 48 and 56) lying points, as indicated only schematically in the drawing, connected with tension elements. These can be attached to the fittings themselves, e.g. by means of a rotary joint, but in the present case the connection is shown in the form of pull chains 70 and 72 (Fig. 4), which are guided over the curved edge of segment-shaped plates 74 and 76 fastened to the fittings 50 and 60 are. The pull chains 70 and 72 sit in pull rods 78 and -80 fort, which loosely through openings in the ends a cross member 82 and are secured at their ends by a screwed nut.

The cross member 82 is movable in the direction of the bed and is driven by a spindle 84 which extends through a nut 86 in the cross member. The spindle 84 is through a reduction gear 90 and a countershaft 92 shown.

The motor. Is operated via a push button control, which or is arranged laterally of the bed on a support beam above the level of the bed base at the head end of the bed sits on a flexible cable leading to the motor, which lies in the bed next to the bedridden person.

The traction system works as follows: In the normal rest position of the bed, the cross member 82 is close to the Center of the spindle 84-. · By operating the push-button control the engine is started and, for example, the crossmember 82 pulled in the direction of the engine. As a result, a tensile force is exerted on the rods 80, which with the over the Plates 76 guided chains 72 interact and thus the ' Turn fittings 60, lifting the footrest part i4 * as soon as the support element 62 against the bottom side of the part rolls or slides off. By connecting the fittings 24 and 26, the seat part 12 follows this movement, there. performs the rotation around the joint 14.

"009887/0211 ' _{/ 12}

In addition, the movement of the cross member in the direction of the motor causes the rods 78 to also move in the same direction can follow, and the fittings 50 therefore rotate in Counterclockwise (Fig. 1 and 2) by the pressure from the back part 10, which rotates around the joint 14, so that the back section remains aligned with the other two sections with the bed placed in the Trendelenburg position will.

The movement of the cross member to the left can be stopped by a switch (not shown) which can reverse the current supply to the motor 88 so that the motor changes its direction of rotation. As soon as the cross member 82 moves towards the center of the spindle 84 (to the right in FIG. 4), the bed returns to its normal rest position. If the motor is not switched off when this position is reached, the cross member exerts even more tension on the rods 78, which set the fittings 50 in clockwise motion via the chains 70 guided on the plates 74, with the support elements 52 moving upwards move and roll or slide on a downwardly directed surface of the side supports of the back part 10 of the frame, while the support element 54 loses contact with the back part. ψ This pushes the back part 10 upwards into a sloping position, with the joint 44 being the fulcrum. Since the backrest is rotated clockwise (direction in Fig. 1-3) "" the short lever between the joints 44 and 20 moves downwards and presses the joint slightly downwards. However, the seat part as such can do this movement downwards do not participate, as it is prevented from doing so by the support element 68. This forces the seat part 12 to tilt in a kind of counter-clockwise direction (direction in FIGS. 1-5), the support element 68 functioning as a tipping point The near end of the seat part 12 is therefore together with the end of the footrest part facing the head end of the bed

raised, resulting in a kink in the joint 22.

009887/0211 _{/ 13}

BATH ORIGINAL

_ ₁₃ _ 2033548

so that parts 12 and 14 together form an inverted V when viewed in side elevation. The opposite end of the footrest part 14 is carried by the support element 62, and the The angle resulting from the kink is limited by the fittings 24 and 26.

For the return from the seat position shown in Fig. $ In the normal rest position, the motor must be operated again, e.g. by means of a switch that can be operated by the cross member for counter-rotation, i.e. for rotation in the same direction as for moving the bed from its normal rest position in the Trendelenburg position was required.

By switching off the motor before the bed has reached one of the two end positions, the bed can obviously be seen put in an intermediate position between these two end positions. Also, the push button control of the motor can be provided with several contact points for reversing the power supply. The motor can also be operated by hand Adjusting device to be operated can be replaced or supplemented.

Patent attorneys

Dipl.-Ing. £. Eder Dipl.-ing. K. Schieschke

• Munich 13 Elisabethstrasse 34

009887/0211

Claims (6)

Patent attorneys Dipl.-Ing. E. tder
Dipl.-Ing. K. Schieschke ο _n qqc / ο • Munich 11 BlialMttMtrae 94 Claims Adjustable bed with any floor that can be designed in a flat horizontal position, in a flat position with an elevated foot end and in an angled position with the back section positioned vertically and opposite it The rising seat part and the falling foot support part as well as adjustable in positions between these two end positions is, wherein the bottom has a three-part frame in the longitudinal direction, the parts of which with each other are articulated and with manually operated or motorized parts for adjustment for adjustment the desired position of the bed base, characterized in that the back part (10) of the three-part frame can be rotated by means of a joint (44) immovable with a rigid support frame (40) or a support part (42) fastened to the frame (40) near its connection point is connected to the seat part (14), the back part movably overfinding one on a rotatable with the adjustment part (50) connected to the frame (40) is carried support element (52, 54), wherein the seat part (12) is rotatably connected to the back part (10) via a short lever arm (16) and via a on the support frame (40) attached element (68) is loosely supported, and that the foot support part (14) on a support element (62) is mounted, which is rotatable on a robbery on the support frame (40) attached adjustment part (60) is provided, with parts (74 and 76) are provided over which a Train to rotate one of the adjustment parts (60.50) can be exercised. / 2 009887/0211 2. Bed according to claim 1, characterized in that the support element (68) for the seat part is adjustably attached to the rigid support frame (40). 3. Bed according to claim 1, characterized in that the Seat part (12) and the footrest part (14) close to their . binding joint (22) have fittings (24,26) which converge downward and near their lower ends have a pin (30) on the one hand, which in a curved slot (28 ') can be engaged in the other fitting is. 4. Bed according to claim 1, dedirch characterized ^ that the Adjusting parts (50, 60) are designed in the form of a triangle, one side of which is significantly shorter than that the other two sides, and with a vertex on the short side rotatably attached to the rigid support frame (40) are, wherein the pulling parts (74,76) are arranged near the other vertex on the short side of the triangle. 5. Bed according to claim 1, characterized in that the with the back part (10) of the bed base cooperating adjustment part (50) and that cooperating with the footrest part (14) Adjusting part (60) have a substantially segment-shaped fitting (74), the curved Side of this fitting a unwinding track for the train part (70) forms. 6. Bed according to claim 1, characterized in that the pulling force acting on the pulling parts (74,76) has a Cross member (82) can be exercised, the tension parts loosely extending through openings at its ends and over a nut or a split pin or the like can be secured ", and that the cross member is movable via a screw connection cooperating with a reversibly rotatable spindle (84) is. Patent attorney Dipl. Ing. E. Eder t 009887/0211 Elliab * thitftfß Blank page