EP2063821A2

EP2063821A2 - Rotatable connection adapter

Info

Publication number: EP2063821A2
Application number: EP07801355A
Authority: EP
Inventors: Christof Kurth
Original assignee: Medi GmbH and Co KG
Current assignee: Medi GmbH and Co KG
Priority date: 2006-09-22
Filing date: 2007-09-20
Publication date: 2009-06-03
Also published as: DE202006014753U1; WO2008034428A3; WO2008034428A2; US20100061796A1

Abstract

Rotatable connection adapter (1) particularly as prosthetic fitting part with integrated rotation adjustability for artificial limbs such as prostheses, composed of at least one attachment part (2) and a connection part (3), wherein a further prosthetic fitting part is joined to the connection adapter in such a way that it can be rotated relative to the attachment part but can also be fixed in a defined position, wherein the attachment part has an axial through-bore and, on the underside, an additional coaxial recessed bore or blind bore (5) of greater diameter into which a connection element engages which, at one end, has an at least partially circumferential non-self-clamping edge of smaller height than the depth of the recessed bore or blind bore (5) and which has a diameter smaller than the recessed bore or blind bore but greater than the through-bore (6) through the attachment part, wherein the connection element, on the side opposite the circumferential edge (4), has an axially oriented clamping device which acts between the connection part and the further prosthetic fitting part for fixing the connection adapter on a further prosthetic fitting part and which clamping device under tension also suppresses the rotatability between the connection adapter and a further prosthetic fitting part.

Description

Rotatable connection adapter

description

The present invention relates to a rotatable connection adapter, in particular as a prosthetic fitting with integrated

Rotary adjustment for artificial limbs such as prostheses, consisting of at least one connection part and a connecting part, wherein another prosthetic fitting part is merged with the connection adapter so that it is rotatable with respect to the connection part but can also be fixed in a defined position.

There are different variations of adapters for prosthetic fittings for

Merging known. Some of these adapters are pure fixing adapters and others can be adjusted by twisting and adapting to the required application, or they can be adjusted to the needs of a wearer.

In G 86 20 674.5 U1, e.g. presented a pure connection adapter, but which lacks a Verdrehhmöglichkeit.

Adapters of the type mentioned, which on the one hand a clamping device, such. Having a pyramid head and which is guided in a holder, which are bolted or clamped after alignment of the two prosthetic mating parts to each other, are also known.

In this system is generally a setting, or rotation of the two prosthetic fitting parts to each other by loosening the screws with which the lower, not provided with the clamping member on the part, for example, Prosthesis stump bolted or pressed, dissolved and set the desired orientation.

A disadvantage here is that always all screws must be opened on the connector and thus the connection usually has to be readjusted with only a small desired change in the axial alignment of the connecting parts.

An orthopedic technician must return to the entire prosthesis

Take a workshop and this is there adjusted by him.

Object of the present invention is to provide a rotatable adapter, which circumvents the known disadvantages and which allows easy adjustment, or change the setting.

This object is achieved with the features of the characterizing part of claim 1. Training and advantageous embodiments of the invention are included in the further claims.

According to the invention, a rotatable connection adapter is in particular a prosthetic fitting with integrated rotation adjustment for artificial limbs such as prostheses, consisting of at least one connection part and a connecting part, wherein another prosthetic fitting part is merged with the connection adapter so that it is rotatable with respect to the connection part but also in one defined position can be fixed, wherein the connecting part has an axial through hole, as well as on the underside additional coaxial Senk- or blind bore of larger diameter, in which engages a connecting element which lesser at one end over a, at least partially encircling, not self-clamping edge Height than the depth of the countersunk or blind bore has and which has a diameter smaller than the countersunk or blind bore, but larger than the through hole through the connecting part, wherein the verb indungselement on the opposite side of the peripheral edge, an axially aligned, between the connecting part and the other Prosthetic fitting part acting tensioning device for fixing the connection adapter to another prosthetic fitting part, which under tension also prevents the rotatability between the connection adapter and another prosthetic fitting part.

According to a preferred embodiment, the connecting piece is provided on the circumferential, not self-clamping edge opposite side with a four-sided pyramid head, wherein the pyramid tip points in the direction of the peripheral edge and the pyramid base forms the end of this connector.

Also preferred embodiments of the invention, depending on the application and the type of prosthetic fittings to be connected, the execution as a solid or hollow cylinder with lateral interventions or holes, ball head or calotte on the opposite side of the peripheral edge, for the connector. In the embodiments with a pyramidal head, spherical head or calotte arise at the connector, on the side opposite the peripheral edge side surfaces such. the four side faces of a four-sided pyramidal head.

When using a solid or hollow cylinder as a connecting piece, the connector on the opposite side of the circumferential edge a cylinder with introduced in the cylinder wall, lateral bores, possibly with thread. A to be attached to the connector, or to be attached further prosthetic fitting part also has holes on its preferred also cylindrical circulation, which are to be brought into engagement with the holes in the connector. According to a preferred embodiment of the invention, the connection adapter or the connection adapter system is performed with four screws on the described clamping, which allow by tightening a rigid connection between the connector and the prosthetic fitting part by the Circumferential edge of the connecting piece against the counterbore or blind hole in the

Connecting part is clamped.

With the clamping screws, which advantageously slightly inclined to

Connecting axis of both prosthetic fitting parts is executed, a force acting on the connecting piece and the other prosthetic fitting part, which generates the connecting piece along the through hole in the connecting part in

Direction of the other prosthetic part pulls.

By this, resulting from the clamping traction is the circumferential

Edge of the connecting piece against the circulation of the countersunk or blind bore in

Pressed connection part, whereby a clamping takes place at this point.

The clamping between the peripheral edge of the connecting piece and the circulation of the countersunk or blind bore in the connecting part, caused by the compression fittings between the connecting piece and the other prosthetic fitting part, create a rigid connection of the fitting parts and prevent the rotation of these against each other, ideally up to a axially acting on this torque of at least 50 Nm. This mentioned, preferred deadlock is not self-clamping according to a desirable embodiment, but releases the rotatability of the two parts again as soon as the clamping on the opposite side between the connector and the other prosthetic fitting part is loosened. In a preferred embodiment, it is sufficient if only two of the preferably arranged four screws are released at the clamping between the connecting piece and the other prosthetic fitting part in order to release the rotatability between the connecting part and the connecting piece again.

The possibility of producing the rotatability of the prosthetic fitting parts connected to the rotatable connection adapter by loosening only two clamping screws permits a very simple change and adaptation of the positions of prosthetic parts to one another in order to optimize, for example, the motion pattern of a prosthesis wearer or better to adjust it to his needs. The screws used to produce said clamping are used as grub screws.

In the preferred embodiment of the invention, the surface of the peripheral edge on the side facing the connector part and / or the circulation of the countersunk or blind bore in the connecting part with a toothing, knurling, screening or increased roughness. On the one hand, this increases the clamping force between the connecting part and the connecting piece that occurs at this point when the clamping is activated and, on the other hand, allows very exact, reproducible changes in the rotation between the prosthetic mating parts, which facilitates the handling and adjustment of this adapter for the user.

In the following the invention will be described by way of example with reference to drawings. Showing:

Fig. 1 shows a first embodiment of a connection adapter.

Fig. 2 is another view of the connection adapter shown in Fig. 1.

Fig. 3 shows another embodiment of a connection adapter.

Fig. 4 is another view of the connection adapter shown in Fig. 3.

The connection adapter 1 in the embodiment of FIG. 1 and FIG. 2 consists of the connection piece 3 and the connection part 2. In the embodiment shown here, the connection part has on its upper side a curved surface on which a prosthetic fitting part rests for connection, which has a receptacle for the pyramid head with its surfaces 8 of the connector 3. When tightening the pyramid head in another prosthetic fitting part by screwing and clamping on the pyramid surfaces 8, the connector 3 is pulled through the axial through hole 6 upwards and the circumferential cylindrical rim 4 is pulled with its surface against the groove in the coaxial blind bore 5 of the connection part , whereby the two parts are braced against each other and the rotatability of the two parts is mutually prevented.

FIGS. 3 and 4 show a variant with a connecting piece 7 designed as a hollow cylinder for connection to such a further prosthetic fitting part. The clamping between the connecting part 7 and the connecting part 2 is also effected here by the drawing of the edge 4 of the connecting piece 7 to the groove of the blind bore 5, wherein the two parts are clamped against each other and the rotatability is prevented each other. By the introduced screening 10 is a reproducible, exact adjustment of the angle by which the two parts are rotated against each other easier.

Having described preferred embodiments of the invention with reference to the accompanying drawings, it is to be understood that the invention is not limited to these precise embodiments and that various changes and modifications may be made thereto by those skilled in the art without departing from the scope of the invention as it is is defined in the appended claims is deviated.

Claims

Rotatable connection adapterProtection claims

1. Rotatable connection adapter (1) in particular as a prosthetic fitting with integrated Drehverstellmöglichkeit for artificial limbs such as prostheses, consisting of at least one connecting part (2) and a connecting part (3), wherein a further prosthetic fitting part with the connection adapter (1) is merged, that it with respect to the connecting part (2) is rotatable but can also be fixed in a defined position, characterized in that the connecting part (2) has an axial through-bore (6), and on the underside additional coaxial Senk- or blind bore (5) of larger diameter in which a connecting element (3) engages, which at one end has an at least partially encircling, not self-clamping edge (4) lesser height than the depth of the countersunk or blind bore (5) and which has a diameter smaller than that Countersink or blind bore, but larger than the through hole (6) dur the connecting part (3) has on the side opposite the circumferential edge an axially aligned clamping device acting between the connecting part (3) and the further prosthetic fitting part for fixing the connecting adapter (1) to a further prosthetic one Has fitting part, which under tension also prevents the rotatability between the connection adapter (1) and another prosthetic fitting part.

2. Rotatable connection adapter according to claim 1, characterized in that the connecting piece (3) on the peripheral edge (4) opposite side as a four-sided pyramid head (8) is executed.

3. Rotatable connection adapter according to claim 1, characterized in that the connecting piece (3) on the peripheral edge (4) opposite side as a solid or hollow cylinder (7) is executed and has lateral interventions or holes (9).

4. Rotatable connection adapter according to claim 1, characterized in that the connecting piece (3) on the peripheral edge (4) opposite side is designed as a ball head or calotte.

5. Rotatable connection adapter according to claim 1, characterized in that the connecting piece (3) on the peripheral edge (4) opposite side faces (8), can be braced on the screws of another prosthetic fitment.

6. Rotatable connection adapter according to claim 1, characterized in that the connecting piece (3) on the peripheral edge (4) opposite side a clamping device with screws to the fixed

Connecting a prosthetic fitting with the connection adapter (1).

7. Clamping device according to claim 6, characterized in that the clamping device has four screws, by means of which another prosthetic fitting part, which is located on a spherical cap four-sided

Pyramid head, with the rotatable connection adapter, by tightening the screws, is rigidly connected.

8. Clamping device according to claim 6, characterized in that the clamping screw is inclined to the connecting axis of both prosthetic fitting parts (1, 2 ^' ) is executed.

9. Clamping device according to claim 6, characterized that the active clamping screw has a rigid, non-rotatable connection of the two prosthetic fittings, up to an axially acting torque of 50 Nm.

10. Clamping device according to claim 6 to 9, characterized in that the screws are screwed for the clamping screw Madensch.

11. Rotatable connection adapter according to claim 1, characterized in that in the blind bore resulting Umlaufnut and / or the lower plate of the connecting part (3) with a toothing, knurling, screening or increased roughness (10) is executed.

12. Rotatable connection adapter according to claim 11, characterized in that the toothing, knurling or screening (10) allows a defined and reproducible change in the angle of rotation.