EP2979674B1 - Birthing bed with a retaining handle and braking device - Google Patents

Description

The invention relates to a delivery bed with headband according to the preamble of claim 1.

Delivery beds with headband of the type mentioned are known. It is, for example, a maternity bed according to the German Utility Model DE 20 2007 006 965 provided with such a bracket. The headband is pivotally mounted to extend the range of use of the retaining clip over those embodiments with a permanently mounted headband. The swivel headband serves as a handle and support aid for the maternity person in the high position or intermediate position, while in the horizontal position the bar is helpful for moving the bed. The connecting rod of the retaining bracket, advantageously equipped with a cushion, is used by the reliever with pivoted headband for comfortable support and as a head bearing in a horizontal position. The headband is lockable within a certain adjustment range in all angular positions. This has a one-handed operation of the handling device for locking the Retaining bracket proven in the desired tilt angle in terms of ease of use.

The maternity bed according to the DE 20 2013 006 475 forms the known birthing beds to the effect that the headband is biased in the equipped with friction clutches locking device is installed. This ensures that after releasing the locking device, the friction clutches are released immediately, and the headband can be pivoted substantially resistance free.

From the GB 506 397 A is a maternity chair with back part, seat part and footboard known that can be adjusted against each other. To lock the setting between the back and seat part each have a multi-plate clutch is provided at the associated joints between the back and seat part, which can be locked by a friction-locked frictional engagement.

The known maternity beds with headband have the disadvantage that the headband can be pivoted substantially without resistance after loosening the locking device. This involves the risk that the headband is pivoted uncontrollably in the event of an unwanted or unconscious solution of the locking device due to its own weight. This danger is particularly of high relevance, since in the immediate vicinity of the maternity bed not only specialist personnel is active, but also, for example, relatives, especially the man of the childbirth.

If the locking device of the known delivery beds thus unintentionally released, and the headband pivots uncontrollably downwards due to its own weight, it can cause injuries, especially injuries to the newborn child caused.

Based on this prior art, it is therefore an object of the present invention to provide a new maternity bed with headband, with which the risk of injury is reduced or excluded in the event of unwanted solution of the locking device.

This object is achieved by a delivery bed according to the teaching of claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

The maternity bed according to the invention is based on the basic idea that the headband cooperates with a braking device in addition to the locking device. The braking device is designed so that counteracts the braking torque applied by the braking device of the pivotal movement of the retaining clip. As a result, is achieved by the braking device that the headband after opening the locking device can not be pivoted without resistance, but only after overcoming the braking torque applied by the braking device. Thus, it can be achieved that the headband does not pivot uncontrollably down after opening the locking device, but is either completely fixed in position or at least with significantly reduced speed of movement drops down.

In order to ensure the effect of the braking device at any time, it is inventively provided that the braking torque applied by the braking device is preset. Due to this fixed presetting of the braking torque, which can only be changed by suitably trained specialist personnel, it is ensured that the braking effect of the braking device is not unintentionally or unconsciously adjusted.

The magnitude of the brake torque applied by the braking device depends essentially on the weight of the retaining clip and the lever ratios of the pivotable mounting of the retaining clip. In order to reliably prevent injuries due to uncontrolled movements of the retaining clip after releasing the locking device, the braking torque of the brake device is preset so that it is greater than the output torque caused by the weight of the retaining clip. This ensures as a result that the headband can not perform any pivoting movement after releasing the locking device due to its own weight, since the weight of the retaining bracket is not sufficient as output torque to overcome the brake torque applied by the braking device.

Furthermore, it is particularly advantageous if the braking torque of the braking device is adjustable with an adjusting device. As a result, trained specialist personnel for installing the maternity bed have the option of adapting the braking torque applied by the braking device to the respective boundary conditions and also of compensating for manufacturing tolerances.

Conversely, the braking torque should not be unnecessarily high, as this reduces the ease of use in the adjustment of the pivot angle of the retaining clip by the operator, or an adjustment by hand is completely excluded. It is therefore particularly advantageous if the braking torque of the braking device is smaller than a aufbringbares by the user on the headband drive torque.

In what way the braking device is designed constructively, is basically arbitrary. A particularly reliable and comfortable braking device is obtained when the braking device is designed in the manner of a multi-disc brake. This multi-disc brake contains a disc pack with at least two fixing blades and at least two pivoting blades. The fixing lamellae are characterized by being directly or indirectly connected to the frame of the delivery bed are connected and thereby realize a rotationally fixed support. In contrast, the swivel blades are rotatably connected to the headband. This connection can be made directly or indirectly, ie the swivel blades do not need to be attached directly to the headband, but can also be connected to a pivotable together with the headband component, such as the pivot axis. In the disk pack, the fixing blades and the pivot blades are alternately arranged one behind the other and come with their frontal pressure surfaces to each other to the plant. This results in a very high friction surface in the disk set, so that the pressure required to apply the braking torque can be selected relatively small. To apply the pressing force, the disk set comprises two lateral pressure surfaces which come to rest on the two outermost disks and clamp the disk set. Depending on the pressing force applied by the pressure surfaces, a corresponding driving force acts between the fixing blades and the swivel blades, so that the desired braking torque acts on the retaining bracket via the pivot blades, which are braked on the fixing blades.

In order to minimize the breakaway torque, which must be overcome when pivoting the pivot blades relative to the fixing blades, a suitable material combination of different materials should be selected when selecting the material for the pivot blades or for the fixing blades. Particularly suitable seems to be a pair of materials made of brass lamellae and steel lamellae, where it is basically irrelevant whether the fuser blades or the swivel blades are made of steel or brass, as long as the respective adjacent lamellae are made of different materials.

To reduce settlement effects when clamping the disk pack with respect to the bias of the slats or exclude is it is particularly advantageous if a tension spring, in particular a plate spring is provided on the disk brake, with which the bias of the disk pack is applied elastically. Due to the spring force effect settlement tolerances can be compensated easily. In addition, the adjustment of the multi-disc brake, ie, the adjustment of the braking torque applied by the multi-disc brake, can be facilitated by the tension spring, since the pressure force exerted by the tension spring continuously increases during tensioning of the tension spring.

With regard to a simple adjustment of the braking torque applied by the braking device, it is particularly advantageous if a pressure surface for biasing the disk set is formed by the end face of an adjusting nut. By turning the adjusting nut in a Justiergewinde of the disk housing, the installation length of the interior can be changed in the interior of the disk housing for receiving the disk set. The tension springs, in particular the disc springs, can be advantageously mounted between the adjusting nut on the one hand and the outermost blade of the disk pack on the other hand.

If the locking device is designed to fix the retaining clip in the manner of a one-hand lock, with which the fixing elements, for example the friction surfaces, can be loosened on both sides of the lying surface, this is for the transmission of the adjusting movement necessary to release the locking device on both sides of the lying surface is necessary, an axis along its longitudinal axis axially adjustable necessary. In terms of design, it is particularly simple that the multi-disc brake transmits its braking torque to the rotatably mounted axle. However, if the axis is axially displaceable in order to realize a one-hand operation of the locking device on both sides of the lying surface, then the multi-disc brake must also be axially displaceable in order to be able to follow the adjusting movement of the axle. Around To realize such axial adjustment of the multi-disc brake, it is particularly simple that the disk housing has at least one claw which engages in a recess and the disk housing rotatably supported on the frame of the delivery bed. In other words, this means that the claw dissipates the braking force received by the fixing lamellae via the lamellar housing into the frame of the delivery bed. At the same time, the claw is axially displaceably mounted in the recess in the longitudinal direction of the axis, so that the disk housing and thus the entire disk brake can track the axial displacement of the axle.

In which way the locking device itself is formed, in turn, in principle arbitrary. It is particularly advantageous if at least one friction surface, which is connected to a free leg of the retaining clip, is provided outside the lying surface and facing this to form the locking device. A second friction surface of this first friction surface is arranged at a distance opposite stationary, one end of the axis is provided with a connected to the headband friction surface against the lying surface with respect to the stationary friction surface leading and pressing together handling device. The other end of the axis is connected to the headband, and the axis is slidably mounted in the longitudinal direction with respect to the lying surface. By actuating the handling device, the friction surfaces on both sides of the lying surface can be moved towards each other and finally brought into contact. The actuation takes place at the arranged only on one side of the bed surface handling device and is transmitted by means of the real displaceable axis to the other side of the bed surface for the second Reibflächenpaarung.

A particularly simple construction results when the lamella housing is installed in the free end of a leg of the retaining clip. This type of construction also allows existing ones Provide maternity beds by retrofitting the retaining clip according to the invention.

Furthermore, it is particularly advantageous if the recess in which the claw of the disk housing is mounted axially displaceable and rotatably supported, is arranged in the fixedly provided on the lying surface friction surface of the locking device.

Preferably, both free legs of the retaining clip should each have a locking device, wherein both locking devices are connected to each other via the axis and are fixed together by one-handed operation of arranged on one side of the lying surface handling device.

As far as the headband has a bias in arrangement to the maternity bed, by which the free legs are pressed apart or compressed, the braking device according to the invention is of utmost importance. Because by the bias of the retaining clip is achieved that the frictional fixing of the retaining clip is released immediately upon opening of the locking device, so that there is a correspondingly high risk of accidents without the braking device according to the invention in these embodiments.

Fig. 1

eine schematisierte Draufsicht auf ein Entbindungsbett mit einem Haltebügel;

Fig. 2

eine schematisierte Seitenansicht des Entbindungsbetts gemäß Fig. 1;

Fig. 3

eine Feststelleinrichtung als Teil der Arretiereinrichtung des Haltebügels des Entbindungsbetts gemäß Fig. 1 mit verzahnten Reibflächen;

Fig. 4

den Haltebügel des Entbindungsbetts gemäß Fig. 1 in demontiertem, entspanntem Zustand;

Fig. 5

die Lamellenbremse zur Abbremsung des Haltebügels des Entbindungsbetts gemäß Fig. 1 im Querschnitt.

The invention will be explained by way of example with reference to the drawings. Show it:

Fig. 1

a schematic plan view of a delivery bed with a headband;

Fig. 2

a schematic side view of the delivery bed according to Fig. 1 ;

Fig. 3

a locking device as part of the locking device of the retaining clip of the delivery bed according to Fig. 1 with toothed friction surfaces;

Fig. 4

the headband of the maternity bed according to Fig. 1 in disassembled, relaxed state;

Fig. 5

the multi-disc brake for braking the retaining clip of the maternity bed according to Fig. 1 in cross section.

Fig. 1 to Fig. 3 show a maternity bed, in the lying surface 01 in the transverse direction and parallel to the surface of an axis 03 extends.

The axis 03 is rotatably mounted in the lying surface 01 and longitudinally displaceable. At the axis 03, a headband 02 is attached. The headband 02 is U-shaped, wherein the free legs of the retaining clip 02 are guided on both sides of the lying surface 01 to the axis 03. Both free legs of the retaining clip 02 are provided with facing the lying surface 01 friction surfaces 21. The friction surfaces 21 are similar, on the lying surface 01 mounted friction surfaces 11 opposite. Advantageously, the friction surfaces 11 and the friction surfaces 21 are designed as concentric to the axis 03 circular rings. A first free leg of the retaining clip 02 is provided with a handling device 04. The handling device 04 consists of a handle and a cooperating with the axis 03 gear 41. The second free leg of the retaining clip 02 is fixedly connected to the axis. The headband 02 can, when dissolved, ie in a sufficiently large spaced-apart friction surfaces 11 and 21 according to Fig. 2 with respect to the lying surface 01 by up to 180 ° about the axis 03 are pivoted.

On the axis 03, which is pivoted together with the headband 02, a braking device 31 is provided, which is designed in the manner of a multi-disc brake. The multi-disc brake 31 is rotatably supported on claws 32 on the frame of the sunbed below the lying surface 01. By means of the multi-disc brake 31, a braking torque can be applied to the retaining bracket 02, which counteracts the pivotal movement of the retaining clip 02. The construction of the multi-disc brake 31 will be described below with reference to FIG Fig. 5 explained in more detail.

If, by means of the handling device 04, the friction surfaces 21 are guided against the friction surfaces 11 against the friction surfaces 11 against the friction surfaces 11 on the lying surface 01 and finally pressed, the retaining bracket 02 can be locked in any desired angular position to the lying surface 01. If the handling device 04 is actuated in opposite directions, the friction surfaces 21 are released from the friction surfaces 11. Due to the relaxation of the prestressed retaining clip 02, in which the free legs are pressed apart, and by the pressure of arranged between the friction surfaces 11 and the friction surfaces 21 compression springs 05 achieved that results in a floating symmetrical positioning of the free ends of the two free legs of the retaining clip at the same time defined distance of the friction surfaces 21 to the friction surfaces 11. This ensures that the locking by the friction surfaces during release of the handling device 04 is reliably solved. By the bias of the retaining clip 02, if necessary, the installation of the compression springs 05 can be saved.

According to Fig. 3 the axis 03 penetrates the lying surface 01. With the protruding from the lying surface 01 end of the axis 03, a free leg of the retaining clip 02 is connected. On the lying surface 01 friction surfaces 11 and the headband 02 friction surfaces 21 are arranged opposite each other and are advantageously designed as the axis 03 concentric circular rings. The friction surfaces 11 and 21 are provided with teeth 06, which mesh with each other for locking the retaining clip 02 relative to the lying surface 01 and thus reduce the required contact pressure due to their positive connection. In order to improve the meshing of the teeth 06, at least one of the friction surfaces 11 and / or 21 may each be supported at least slightly concentrically rotatable. The operation of the handling device 04 not shown here for locking the retaining clip 02 causes the free leg of the retaining clip 02 is pulled by the axis 03 against the flank of the lying surface 01 and the teeth 06 of the friction surfaces 21 engage in the teeth 06 of the friction surfaces 11. Solving the Arresting leads in the opposite direction to the separation of the interventions of the teeth 06. The appropriate for the ease of pivoting of the retaining clip 02 distance between the friction surfaces 21 of the friction surfaces 11 is adjusted by means of the compression spring 05 and by the bias of the retaining clip 02. If desired, the compression springs 05 may also be formed in the manner of tension springs to adjust a balance of forces between the biased by the outward forces of the free legs and the oppositely directed forces of the tension springs.

Fig. 4 shows the headband 02 after disassembly. In the disassembled state, the free legs of the retaining clip 02 elastically spring outward and are easily spread apart. To mount the retaining clip 02 on the delivery bed, the free legs must then be compressed so far that they are substantially perpendicular to the central connector and at the same time are substantially parallel to each other. By this elastic deformation of the retaining clip 02 during assembly, a bias of the retaining clip 02 is caused by the teeth 06 are reliably released from each other.

Fig. 5 shows the multi-disc brake 31 with the claws 32 in cross section. The claws 32 engage in Fig. 5 Not shown recesses on the frame of the maternity bed, so that rotation of the multi-disc brake 31 is excluded relative to the frame by positive engagement. Due to their cylindrical shape, however, the claws 32 can be displaced axially together with the axis 03 in the direction of its longitudinal axis in order to enable the adjustment of the multi-disc brake 31 together with the axis 03 upon actuation of the handling device 04. In the disk housing 33 of the multi-disc brake 31, a disk set 34 is arranged with disc-shaped fixing blades 35 and also disc-shaped pivot blades 36. The fixing blades 35 engage with projections in longitudinal grooves 37 of the disk housing 33 and are thus rotatably connected to the lamella housing 33 and the claws 32 rotatably connected to the frame of the delivery bed. The pivot blades 36 in turn engage with projections in longitudinal grooves 38 on the axis 03 and are thereby rotatably connected to the axis 03 and the bracket 02. When pivoting the retainer 02 and the axis 03 fixed thereto, therefore, the pivot blades 36 are correspondingly pivoted relative to the fixing blades 35, which are mounted non-rotatably relative to the frame.

The disk housing 33 is closed on one side by an adjusting nut 39. The adjusting nut 39 can be screwed into an internal thread at the opening of the disk housing 33 and presses two disc springs 40 against the disk set 34. As a result, therefore, by screwing the adjusting nut 39, the disk set 34 between the bottom of the disk housing 33 and the two disc springs 40 elastic biased. This bias causes in the contact surfaces between the fixing blades 35 and the pivot blades 36 a corresponding friction effect, which generates in the sum of a braking torque, which counteracts the pivotal movement of the axis 03 and thus the pivotal movement of the retaining clip 02. With a suitable adjustment of the adjusting nut 39 can be achieved that the braking effect of the multi-disc brake 31 is just so large that a pivoting of the retaining clip 02 is excluded due to its own weight, and at the same time the necessary to pivot the retaining clip 02 driving force by the user easily be applied to the headband can. The fixing blades 35 are made of steel and the swivel blades 36 made of brass, since this pair of materials gives a good braking torque at relatively low breakaway torque.

Claims (12)

1. A delivery bed having a retaining handle (02) which is pivotable around an axis (03) running parallel to a bed surface (01) of the delivery bed and perpendicular to the longitudinal direction of the bed surface (01), wherein the retaining handle (02) can be fastened in a desired pivoting angle using a fastening means (11, 21) after adjusting the retaining handle (02),
   characterized in that
   the retaining handle (02) interacts with a brake device (31), wherein the brake torque of the brake device (31) counteracts the pivoting movements of the retaining handle (02) in such a way that the retaining handle (02) cannot be pivoted without resistance after opening the fastening means (11, 21) until the brake torque applied by means of the brake device has been overcome, wherein the brake torque of the brake device (31) is permanently preset so that the brake torque of the brake device (31) is larger than the downthrust torque caused by the weight of the retaining handle (02).
2. The delivery bed according to claim 1,
   characterized in that
   the brake torque of the brake device (31) is adjustable by means of an adjusting device, in particular an adjusting nut (39).
3. The delivery bed according to claim 1 or 2,
   characterized in that
   the brake torque of the brake device (31) is smaller than a drive torque applied to the retaining handle (02) by the user.
4. The delivery bed according to any one of the claims 1 to 3,
   characterized in that
   the brake device is formed as a multi-disc brake (31), wherein the multi-disc brake (31) comprises a disc set (34) having at least two fixating discs (35) and at least two pivoting discs (36), and wherein the fixating discs (35) are connected in a torque-proof manner with the frame of the delivery bed, and wherein the pivoting discs (36) are connected in a torque-proof manner with the retaining handle (02), and wherein the fixating discs (35) and the pivoting discs (36) are arranged alternatingly behind each other in the disc set (34), and wherein the disc set (34) can be braced between two pressure surfaces in order to press the fixating discs (35) and the pivoting discs (36) against each other with their friction surfaces, thus producing a brake torque counteracting the pivoting movements of the retaining handle (02).
5. The delivery bed according to claim 4,
   characterized in that
   the pivoting discs (36) are produced from a different material than the fixating discs (35), in particular that the pivoting discs (36) are made of brass and the fixating discs (35) are made of steel or vice versa.
6. The delivery bed according to claim 4 or 5,
   characterized in that
   the multi-disc brake (31) comprises at least one tension spring, in particular a Belleville spring washer (40), with which a pre-stressing force can be elastically applied to the disc set (34).
7. The delivery bed according to any one of the claims 4 to 6,
   characterized in that
   a pressure surface is formed by the frontal surface of an adjusting nut (39), wherein the pre-stressing of the disc set (34) is adjustable by turning the adjusting nut (39).
8. The delivery bed according to any one of the claims 4 to 7,
   characterized in that
   the multi-disc brake (31) is installed in a disc housing (33), wherein the disc housing (33) is mounted on the axis (03) and can be axially adjusted in the longitudinal direction of the axis (03) together with the axis (03) when the locking means (11, 21) are actuated, and wherein the disc housing (33) comprises at least one claw (32) which engages into a recess and supports the disc housing (33) in a torque-proof manner at the frame of the delivery bed, and wherein the claw (32) is mounted axially displaceable in the recess in the longitudinal direction of the axis (03).
9. The delivery bed according to claim 8,
   characterized in that
   the recess, in which the claw (32) of the disc housing (33) is mounted axially displaceable and is supported in a torque-proof manner, is arranged in the friction surface (11) of the locking means, said friction surface (11) being provided stationary at the bed surface (01).
10. The delivery bed according to claim 8 or 9,
    characterized in that
    the disc housing (33) is installed in the free end of a leg of the retaining handle (02).
11. The delivery bed according to any one of the claims 1 to 10,
    characterized in that
    for forming the locking means, at least one friction surface (21) is provided outside of the bed surface (01) and facing towards the same, said friction surface (21) being connected to a free leg of the retaining handle (02), wherein a friction surface (11) is arranged stationary with respect to the bed surface (01) opposite the friction surface (21) at a distance therefrom, an end of the axis (03) is provided with a handling device (04), said handling device (04) guiding the friction surface (21), which is connected to the retaining handle (02), against the friction surface (11), which is stationary with respect to the bed surface (01), and pressing said friction surfaces (11, 21) against each other, the other end of the axis (03) is connected to the retaining handle (02) and the axis (03) is displaceable in its longitudinal direction with respect to the bed surface (01).
12. The delivery bed according to any one of the claims 1 to 11,
    characterized in that
    a locking means (11, 21) is provided at each of the two free legs of the retaining handle (02), wherein both locking means (11, 21) are connected to each other via the axis (03) and can be fixed simultaneously by one-handed actuation of the handling device (04) arranged on one side of the bed surface (01).

Images