WO2010108588A1

WO2010108588A1 - Hospital bed having improved seating surface

Info

Publication number: WO2010108588A1
Application number: PCT/EP2010/001403
Authority: WO
Inventors: Hans-Peter Barthelt
Original assignee: Hans-Peter Barthelt
Priority date: 2009-03-25
Filing date: 2010-03-06
Publication date: 2010-09-30
Also published as: DE102009014307B3

Abstract

The invention relates to a hospital or patient care bed having a reclining frame divided into an upper and lower leg segment in the leg area. The upper and lower leg segments are connected to each other by means of a hinge arrangement. The arrangement of the support area in the upper leg area is implemented such that the edge of the bend, by means of which the mattress is forced to bend downward in the chair position, contacts the line of connection of the joint axes of both hinges, or is distally displaced as seen from the back area, that is, in the direction toward the foot end. A different depth of seat is thereby experienced.

Description

Bench with improved seating surface

From practice, a nursing bed is known which comprises a pedestal and a lying frame thereon. The base is connected to the reclining frame via a rotary hinge. Thereby, the reclining frame can be rotated to a position in which the longitudinal axis is perpendicular to the longitudinal axis of the bed. In the rotated position, the reclining frame can be folded into a chair or chair conformation. The support frame has for this purpose a central portion which is connected via a rotary hinge with the base. At the part of the central section facing the head end, a back section is hooked on. At the opposite end of the central portion is a thigh portion which receives the thigh when the patient is seated thereon. At the distal end of the thigh section, a lower leg section connects, which is connected via a corresponding hinge with the thigh section. Finally, the bed still has a foot section, which is, however, rigidly connected to the base and does not participate in the rotational movement.

To each of the sections include two extending in the longitudinal direction of the bed parallel bars. At the ends of each spar is a hinge by means of which the respective spar is pivotable relative to the spar of the adjacent section. The associated ones Hinges on both sides of the bed are coaxial with each other.

When the known bed is transferred to the sitting position, the seat area in the thigh area ends at a clear distance on the proximal side of those hinges which connect the thigh section to the lower leg section. This effect arises because there is no support surface in the area of the hinges. This gap does not bother the patient, because it is easily bridged by the mattress on it.

This gap also inevitably arises as a retroactive effect due to the vertical extent of the spars. Since the pivoting stroke of the lower leg portion is greater than 90 ° relative to the thigh portion, the hinge axes must be located approximately in the middle of the spar relative to the vertical extent. This requires special embodiments of the hinges to avoid shear and pinch points and ultimately leads to the distal edge of the support surface or seat ends well before the free end of the longitudinal members of the thigh part when the bed is in the chair or chair position , By the longitudinal struts, the mattress is bent at this point in the outer edge region, while it springs back in the region lying to the longitudinal center. This results in a feeling of too short a seat, especially for people with long thighs.

Based on this, it is an object of the invention to provide a nursing bed, in which the reclining frame is to be brought into the sitting position without the feeling of a too short ^' seat arises.

This object is achieved with a nursing bed with the features of claim 1.

The new nursing bed has a lying frame, which includes a central portion, a thigh portion and a lower leg portion. The thigh portion is connected to the lower leg portion via a hinge assembly composed of two hinges disposed on both sides of the bed. The hinge axes are coaxial with each other.

The thigh portion has a support surface arrangement which is delimited by a distal marginal edge, which lies at the level of the connecting straight lines of the two hinge axes or is displaced relative to this connecting straight line on the distal side, and thus in the direction of the lower leg section.

This measure ensures that when the lower leg section is bent into the chair position, the mattress lying thereon is also bent in a correspondingly greater distance from the backrest. The seated patient feels like a contact point on the underside of the thighs, which is closer to the popliteal fossa, and thus gives a more secure seating feeling.

The distal marginal edge may be formed by an element that is elastic and that it deflects to a certain extent downwards, or that may be formed by an element that shows no appreciable compliance in the case of the body weights that normally occur. You can also face a through the Auflägeflächeanordnung defined plane be offset a bit down.

The bearing surface arrangement may be formed by a rigid plate whose edge forms the distal peripheral edge.

The abutment surface assembly may be formed by a plurality of ledges or slats spaced apart in the longitudinal direction of the bed. These strips or slats can be resilient or rigid.

The thigh portion may have two longitudinal spars. Holders may be attached to these spars, which extend in the direction of and towards the lower leg portion, to support an element forming the distal peripheral edge of the seat surface assembly.

Incidentally, developments of the invention are the subject of subclaims.

The following description of the figures explains aspects of the understanding of the invention. Further details which are not described by the skilled person can be taken from the drawings in the usual way, which supplement the description of the figures to that extent. It is clear that a number of modifications are possible.

The following drawings are not necessarily to scale. To illustrate details, certain areas may be exaggerated. In addition, the drawings are strikingly not every detail in the practical implementation. The terms "up" and "down" or "front" and "back" or "right" and "left" refer to the normal position of use or the terminology in beds.

In the drawing, an embodiment of the subject invention is illustrated.

Fig. 1 shows the hospital bed according to the invention in a perspective view in the lying position.

Fig. 2 shows the hospital bed according to the invention in a perspective view in the chair position.

Fig. 3 shows in plan view a section of the thigh section and from the lower leg section, on the left side of the bed;

FIG. 4 illustrates the detail according to FIG. 3, but with the lower leg section folded down; FIG.

Fig. 5 shows the detail according to Fi ^~ g. 3 using plates instead of slats.

Fig. 1 shows in a perspective view of the inventive rotating and Aufstehbett 1 in the lying position, while Fig. 2 shows the bed 1 in the seat or chair position. Bed 1 is a home care bed that is designed similar to furniture. It has a bed border 2 with a headboard 3, a footboard 4 and side walls 5, 6. The viewer facing side wall 5 is in the lying position with the illustrated distance to the ground, which between the lower edge of the side wall 5 and the bottom there is a gap that allows the nurses ermδglich the toes under the bed to get closer. The side wall 5 is movably mounted and passes in the chair position of the bed 1 in a downwardly shifted position, as shown in FIG. 2 reveals. The special mounting of the side wall 5 is explained in detail, for example, in DE 199 12 937 A1, to which reference is made here in order to avoid unnecessary repetitions.

Within the Bedumrandung 2 is, as it can be seen Fig. 2, a height-adjustable base 7 on the upper side of an unrecognizable rotary hinge is fixed with a vertical axis of rotation. The rotary hinge connects the base 7 with a lying frame 11 on which a mattress 12 is located. The reclining frame 11 is rectangular in plan view.

The structure of the rotary hinge is in the WO

2004/037147 Al explained in detail. To avoid unnecessary repetition, reference is made here to the explanation in this document. This document also shows in detail the structure of the socket used. 7

The reclining frame 11 is divided into a central portion 13 which is fixedly connected to the rotary hinge, a back portion 14 which at the central portion 13 in

-S Direction of the head end is hinged, a thigh portion 15 which is also hinged to the central portion 13, and a lower leg portion 16. The lower leg portion 16 is hinged to the distal end of the central portion 13 of the thigh portion 15. The hinge axes about which the sections 14, 15, 16 are movable relative to the central section are horizontal. Finally, the foot frame 11 still has a foot portion 17 which is immovably connected to the base 7.

In the case of a hospital bed eliminates the bed frame 2, whereas all other features are realized. The headboard 3 and the footboard 4 are modified accordingly and attached directly to the base 7 rigid or removable.

The central portion 13 of the reclining frame 11 has two mutually parallel longitudinal beams 18 which are provided at both ends with a respective hinge 19 and 21 respectively. In Fig. 2, only one of the two longitudinal members 18 can be seen because of the representation.

Similar to the central section 18, the thigh section 15 also includes two mutually parallel longitudinal bars 22 which end on the one hand on the hinge 19 and on the other hand on a hinge 23. About the hinge 23 is the recognizable longitudinal beam 22 of the thigh section 15 with a longitudinal spar 24 of the lower leg section 16th connected.

The hinges and the longitudinal members corresponding longitudinal struts and hinges are on the invisible Side of the reclining frame 11 parallel and provided at the same height.

In the lying position, as shown in FIG. 1, the lying frame 11 is so that its longitudinal axis coincides with the longitudinal axis of the bed. Depending on the setting by the patient, the individual sections of the lying frame 11 lie in one plane or they can also be lifted slightly. For example, the back portion 14 can be swung up. If necessary, the thigh and lower leg sections 15, 16 can also be lifted, whereby the legs are lifted with knee bend.

To bring the patient into the chair position, the back portion 14 is brought into an approximately 30 ° position relative to the horizontal and it is the thigh portion 15 pivoted in a 45 ° position upwards, whereby the lower leg portion 16 is raised accordingly. The patient is thus in a kind of trough position. After this position is reached, the reclining frame 11 rotates depending on the embodiment in a clockwise or counterclockwise direction; As soon as this rotational position is reached, the individual sections of the reclining frame 11 are brought into the position shown in Fig. 2 by not illustrated electric motors. The foot section 17 remains in bed so that the patient can reach the ground with their feet. The lower leg portion 16 is shorter than the lower leg of a normal adult.

The kink at the transition between the lower leg 16 and the thigh portion 15 is in a seated patient near the popliteal fossa.

FIG. 3 shows a detail of the thigh section 15 and the lower leg section 16. The illustration shows the plan view of the left side of the bed again, in the lying position according to FIG. 1. In this position, the lower leg section 16 extends in a straight extension of the thigh section 15. The two longitudinal bars 22 and 24 located on the left side and the hinge 23 located therebetween can be seen. The hinge axes of the two hinges 23 located on both sides of the lying frame 11 lie on a connecting line 26.

Within the hinge 23, the two longitudinal beams 22, 24 form overlapping tabs 27 and 28, which are covered by plastic washers 29 and 31 to avoid shearing and crushing. By aligned unrecognizable holes in the tabs 27 and 28 performs a hinge screw 32 through which carries a nut 33 on the inside and serves as a hinge axis.

Between the two longitudinal bars 22 of the thigh section extend a plurality of pairs of adjacent spring strips 34a to 34d, which are formed as glass fiber strips. At the end, the spring strips 34 are each in pairs in ^' mounting blocks 35, which consist of an elastomer. The blocks have for this purpose corresponding receiving pockets, in which the spring strips 34 are inserted. The blocks 35 are plugged onto not recognizable pin, from the inside of the spar 22 protrude. At the bottom of the spar 22 34c and 34d an L-shaped angled support plate 36 is attached to the strips, which forms an arm 37 which projects beyond the connecting line 26 with its free end. At the protruding end of a further strip 38 is fixed, which is inserted in a corresponding receiving pocket 39 which is mounted on the extension 37.

The strip 38 lies on the distal side of the connecting straight line 26 from the view of the thigh section 15 and forms a distal end edge 40.

The support surface or seat surface of the thigh portion 15, as usual in beds, formed by the plurality of parallel and spaced adjacent spring strips 34 and 38, whereby a total of a bearing surface arrangement is formed, which ends at the distal edge 40 of the bar 38. The bearing surface arrangement thus projects beyond the connecting straight line 26 and thus beyond the hinge axis of the two hinges 32 onto the lower leg section 16.

The strips 34 are located with their top in the same plane. In this plane can also be the top of the bar 38. However, it can also be slightly recessed relative to this level down, depending on what is preferable for ergonomic reasons.

The lower leg portion 24 shows a similar structure. It also contains a number of spring strips 41a to 41c running parallel to each other, which are in the end received in holding blocks 42 which are fastened to the inside of the longitudinal spar 24. The design in the region of parallel longitudinal beam 24 on the right side of the bed is carried out in the manner described.

As can be seen, the ledge 41a is spaced from the ledge 38 of the femoral portion 15.

The strips 41 may be made of the same material and have the same length as the strips 34, so that overall the same spring characteristic is achieved.

4, however, shows the cutout according to FIG. 3, but with the lower leg section 16 pivoted downwards, in other words, while the illustration according to FIG. 3 illustrates the lying position, FIG. 4 shows the chair or seat position according to FIG. As can be seen, the mattress 12 is now forced to buckle down the ledge 38, as this forms the most forward boundary. Without the strip 38, the mattress would bend down around the strip 34d, resulting in a subjectively felt shortening of the seating surface. This shortened felt seat provides a less secure seating feeling compared to the arrangement of FIG. 4 when the mattress is forced to bend the bar 38 or edge 40 downwardly.

In a practical embodiment, the distance about which the felted edge of the seat is displaced by the use of the bar 38 in the direction of the popliteal is about 4 cm. This comes about because the mattress is firmly supported by the bar 38. However, the actual seat depth in the chair position changes practically less than the subjectively felt seat depth. Latter is however crucial for the sitting comfort.

As can be seen from this explanation, the strip 38, depending on the requirements and depending on the spring behavior of the mattress over the plane of the strips 34 can be slightly offset downwards. The strip 38 may be designed as a resilient strip, similar to the strips 34 or the bar 38 may be designed as a rigid bar, which bends not appreciably down due to the body weight. In the latter case, it is advisable to arrange the strip 38 somewhat recessed, in order to improve the sitting comfort.

The basic idea of bringing the bending edge 40 for the mattress 12 to an advanced position, so that a greater seat depth is felt, can also be realized with contact surface arrangements which, like FIG. 5, consist of plates 45, 46. While in the previously described embodiment, the bearing surface arrangement is formed by the spring strips 34 and the strip 38, the Auflägeflächenanordnung shown in FIG. 5, the plate 45 which is secured between the longitudinal beams 22, for example via tabs 47. The plate 45 terminates distally to form the edge 40 which, like the distal edge 40 of the groin 35, lies on the distal side of the connecting straight 26 and thus on the distal side of the hinge axes of the hinges 23. The panel or plate support, as shown in Figure 5, is particularly preferred for hospital beds for reasons of hygiene.

The plate 45 is similarly mounted between the longitudinal beams 24 by means of tabs 49. The operation of the plate 45 with the advanced edge 48th is the same as previously explained in detail.

Further, it is conceivable that the plate 45 in the vicinity of the edge 40 curved to extend downwards, as is known from wooden chairs ago.

The advantage of the arrangement shown is that no further moving means must be provided to improve the seat depth. The seat depth corresponds rather also in the central region of the mattress 12 of the length of the thigh portion 15 in the region of the associated longitudinal beams 27th

As can also be readily recognized, the seat depth can be easily adapted to the size of the body, for example, by moving the bar 38 further towards the head end, or optionally a little further towards the lower leg portion 16, to which the bars 41, based on the representation , must be moved to the right to avoid collisions. In this case, if the strip 38 pushes the mattress 12 on its underside further in the direction of the hollow of the knee, and thus projects significantly beyond the plane of the downwardly pivoted lower leg section 16, this is not disturbing. The elasticity of foam mattresses can easily absorb this supernatant.

In the case of using panels, the panel 45 shown is replaced by a panel in which the edge 48 is located at a different location when a different seat depth is needed.

A nursing or hospital bed has a recliner men, which is divided in the leg area in an upper and a lower leg section. The upper and lower leg sections are connected to each other via a hinge arrangement. The contact surface arrangement in the upper thigh area is such that the bending edge over which the mattress is forcibly bent downward in the chair position lies on the connecting line of the joint axes of the two hinges or seen from the back region, distally relative to this connecting straight line, ie in the direction is shifted to the foot end. This will feel a different seat depth.

Claims

Claims:

1st care bed

with a height-adjustable base (7),

with a lying on the base (7) lying surface (11), to the at least

a central portion (13) connected to the base (7),

a thigh portion (15) hinged to the central portion (13), and

a lower leg section (16) to be placed in a downwardly hanging position, with a hinge arrangement (23),

- which connects the thigh portion (15) with the lower leg portion (16),

- Has the two hinges (23), each of which is present on the associated side of the lying surface (11) whose hinge axes are coaxial with each other, and

in which a distal and a proximal side are distinguished, which are separated by the connecting line (26) of the hinge axes and of which the proximal side is adjacent to the central section (13), and a bearing surface arrangement (34, 38; 45) in FIG the thigh portion (15) designed such that its distal edge (40) on the connecting line

(26) the hinge axes of the two hinges (23) or on the distal side of the connecting straight line

(26) lies.

2. Nursing bed according to claim 1, characterized in that the distal peripheral edge (40) of the bearing surface arrangement (34, 38; 45) is formed by a non-resilient element (38).

3. Nursing bed according to claim 1, characterized in that the distal peripheral edge (40) of the bearing surface arrangement (34, 38; 45) is formed by a resilient element (38).

4. Nursing bed according to claim 1, characterized in that the bearing surface arrangement (34, 38, -45) from a reaching to the distal peripheral edge (40) extending plate (45) is formed, which at the proximal end preferably into the vicinity of the central portion (13).

A nursing bed according to claim 1, characterized in that the support surface arrangement (34, 38; 45) is formed by a multiplicity of parallel adjacent bars (34, 38) or slats which are spaced apart in the longitudinal direction of the bed (1).

6. Nursing bed according to claim 1, characterized in that the distal marginal edge (40) is displaced slightly downwards relative to a plane defined by the bearing surface arrangement (34, 38; 45).

7. Nursing bed according to claim 1, characterized net, that the thigh portion (15) has two mutually parallel longitudinal bars (22), between which the bearing surface arrangement (34, 38, 45) arranged and to which the bearing surface arrangement (34,38; 45) is attached.

8. Nursing bed according to claim 1, characterized in that each of the longitudinal bars (22) has a holder (36), which forms a fastening means for an element (38) that the distal peripheral edge (40) of the support surface means (34, 38; ).

9. nursing bed according to claim 1, characterized in that the hinge axis (26) is located approximately at the center of the longitudinal bars (22), based on the horizontal extent.

10. Nursing bed according to claim 1, characterized in that the lower leg portion (16) relative to the thigh portion (15) is pivotable through an angle of more than 90 °.

11. Nursing bed according to claim 1, characterized in that the distal marginal edge (40) of the bearing surface arrangement (34, 38; 45) lies in the region of the lower leg section (16) when the lower leg section (16) is in a straight line

Extension of the thigh section (15) runs.

12. Nursing bed according to claim 1, characterized in that the lying surface (11) is connected to the base (7) via a rotary hinge whose axis is vertical.