WO2024261081A1 - Interface for an operation image-capture system - Google Patents

Abstract

The invention relates to an interface (4) for an operation image-capture system (1), comprising a proximal part (5) supported on a holding arm (2) and a distal part (6) supported on an image-capture unit (3), wherein the proximal part (5) and the distal part (6) can be connected to one another along a coupling axis (7) by means of a coupling mechanism to fasten the image-capture unit (3) to the holding arm (2). In order to create an interface (4) for an operation image-capture system (1), said interface ensuring a secure mechanical connection and an easy-to-use electric connection while having a compact structure, according to the invention the coupling mechanism (8) is designed as a simultaneously mechanical and electrical coupling mechanism (8), wherein the mechanical coupling is achieved by a threaded connection (9) with an additional anti-rotation device (10) and the electric coupling is achieved via electric contacts (11, 12) which come into active connection with one another.

Description

interface for a surgical image acquisition system

The invention relates to an interface for a surgical image recording system, with a proximal part mounted on a support arm and with a distal part mounted on an image recording unit, wherein the proximal part and the distal part can be connected to one another by means of a coupling mechanism along a coupling axis in order to fix the image recording unit on the support arm.

Interfaces according to the invention serve to connect the image recording unit and holding arm components of a medical surgical image recording system. In addition to the purely mechanical fixing of the image recording unit to the holding arm, electrical contact is also required in order to be able to loosen and re-fix the joints of the holding arm for aligning the image recording unit.

In the surgical image recording systems known from practice, the electrical connection from the image recording unit to the holding arm is made via a separate cable in such a way that the brakes of the electromagnetically braked or robotic holding arm are released via a separate foot switch or button.

The patent DE 102020 100677 B3 discloses a surgical image recording system with operating elements for controlling a holding arm connected to the surgical image recording system.

The published patent application DE 10 2017 111 302 A1 teaches a medical mechatronic interface device for coupling a surgical assistance system to a support structure. This comprises mechanical coupling means, an electronic interface and a centering device.

Based on this, the invention is based on the task of creating an interface for a surgical image recording system which ensures a secure mechanical connection and an easy-to-use electrical connection with a compact design.

The solution to this problem is characterized according to the invention in that the coupling mechanism is designed as a simultaneous mechanical and electrical coupling mechanism, wherein the mechanical coupling takes place via a threaded connection with additional anti-twisting protection and the electrical coupling takes place via electrical contacts that come into operative connection with one another.

By combining the mechanical connection and the electrical connection in a component consisting of two parts, it is possible to make the interface particularly compact. The integration of an anti-twist device into the mechanical connection ensures correct contact and protection against accidental release of the coupling mechanism.

In a practical embodiment of the invention, it is proposed that the proximal part and the distal part engage with each other in a form-fitting manner at least in sections in order to form the anti-twisting device.

To form the positive locking device against rotation, the invention proposes that a projection which projects forwards in the direction of the coupling axis and is non-circular in circumference is formed on the proximal part or on the distal part and a recess which is non-circular in circumference is formed on the corresponding distal part or proximal part to accommodate the non-circular projection. The formation of the two components which are non-circular in circumference and which are used when contacting the Interface interlocking represents a type of connection that is easy to produce and also simple and safe to handle, which at the same time ensures the precise positioning of the two components to be contacted.

According to a preferred embodiment of the invention, it is proposed that, in order to form the threaded connection on the proximal part or on the distal part, a ring provided with an external thread and freely rotatable about the coupling axis is mounted, via which the external thread can be screwed into an internal thread of the corresponding distal part or proximal part. The freely rotatable ring, designed in the manner of a union nut, enables the proximal part to be connected to the distal part of the interface easily and quickly.

In order to be able to grip the rotatable ring provided with the external thread safely and firmly, the invention further proposes that grip recesses are formed on the ring.

Furthermore, the invention proposes that spring pins are arranged on the underside of the ring facing the associated proximal part or distal part, pointing radially towards the proximal part or distal part, which engage with spring-loaded locking elements in corresponding receptacles on the proximal part or distal part. These spring-loaded locking pins act on the one hand as a safeguard against accidental loosening of the threaded connection, for example as a result of vibrations, and on the other hand offer haptic feedback for the operator when tightening or loosening the threaded connection.

To form the electrical contact between the image recording unit and the holding arm, the invention proposes that the electrical contacts are designed as spring contact pins and as corresponding contact surfaces that come into active connection with the spring contact pins. Spring pin contacts do not create the desired electrical contact by simply inserting or touching the contacts on both sides, but by exerting a certain contact pressure so that a spring-loaded contact pin is pressed in to establish the electrical contact. In conjunction with the threaded connection, this ensures that the electrical contact only occurs when the threaded connection is sufficiently tight. is tightened in order to press the spring contact pins far enough to make electrical contact.

The pitch of the threaded connection is advantageously designed such that the mechanical anti-twist device and the electrical contacts engage relative to each other after 3.5 revolutions of the proximal part and the distal part.

Finally, the invention proposes that the electrical contacts have sensors for identifying the components connected to one another via the electrical contacts. For example, the holding arm can recognize which load has been attached to the distal side in order to enable appropriate automatic weight compensation.

Further features and advantages of the invention are apparent from the accompanying drawings, in which an embodiment of an interface according to the invention for a surgical image recording system is shown only as an example, without restricting the invention to this embodiment. It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention. In the drawings:

Fig. 1 is a schematic perspective view of a surgical imaging system;

Fig. 2 is an enlarged view of detail II according to Fig. 1, showing the proximal part and the distal part of the interface in the decoupled state and

Fig. 3 is a view similar to Fig. 2, but showing the proximal part and the distal part of the interface in perspective view.

The illustration Fig. 1 shows a surgical image recording system 1, which essentially consists of a holding arm 2 and an image recording unit 3 mounted on the holding arm 2, wherein the coupling of the image recording unit 3 with the holding arm 2 takes place via an interface 4.

The images shown in Fig. 2 and 3 enlarged and separated from the operating

The interface 4 shown in the image acquisition system 1 consists of a holding arm 2 mounted proximal part 5 and a distal part 6 mounted on the image recording unit 3, which can be coupled together along a coupling axis 7 via a coupling mechanism 8.

As can be seen in particular from Fig. 3, the coupling mechanism 8 is designed as a simultaneous mechanical and electrical coupling mechanism 8, wherein the mechanical coupling takes place via a threaded connection 9 with additional anti-twist device 10 and the electrical coupling takes place via electrical contacts 11 and 12 which come into operative connection with one another.

In the illustrated embodiment of the interface 4, the threaded connection 9 consists of an external thread 13 formed on the proximal part 5, which can be screwed into an internal thread 14 formed on the distal part 6. In order to be able to screw the external thread 13 of the proximal part 5 into the internal thread 14 of the distal part 6, the external thread 13 is formed on a ring 15 that is freely rotatable about the coupling axis 7 and mounted on the proximal part 5. To better grip and rotate the ring 15, which is designed in the manner of a union nut, grip recesses 16 are formed on the outer circumference of the ring 15.

As an alternative to the illustrated arrangement of the external thread 13 on the proximal part 5 of the interface 4 and the internal thread 14 on the distal part 6 of the interface 4, it is of course also possible to form the external thread 13 on the distal part 6 of the interface 4 and the internal thread 14 on the proximal part 5 of the interface 4 without thereby changing the functioning of the coupling mechanism 8.

In order to provide the operator of the surgical image recording system 1 with haptic feedback when turning the ring 15 when tightening or loosening the threaded connection 9 and to prevent accidental loosening of the threaded connection 9, for example due to vibrations, spring pins 17 pointing radially towards the proximal part 5 are arranged on the underside of the ring 15 facing the associated proximal part 5, which engage with spring-loaded locking elements in corresponding receptacles on the proximal part 5. The spring pins 17 produce clearly noticeable locking steps when the ring 15 is rotated.

In addition to the threaded connection 9, the mechanical part of the coupling mechanism 8 has the anti-twist device 10, which on the one hand prevents twisting of the proximal part 5 and the distal part 6 relative to each other and, on the other hand, ensures precise positioning of the proximal part 5 and the distal part 6 relative to each other when the coupling mechanism 8 is assembled.

In the embodiment shown, the anti-twist device 10 is designed as a positive-locking anti-twist device 10 such that a projection 18 protruding forward in the direction of the coupling axis 7 and having a non-circular circumference is formed on the proximal part 5 and a recess 19 having a non-circular circumference is formed on the corresponding distal part 6 for receiving the non-circular projection 18.

When tightening the threaded connection 9, the projection 18 of the proximal part 5 of the interface 4 engages in a form-fitting manner in the recess 19 of the distal part 6 of the interface

4 and thus fixes the two parts 5 and 6 against rotation around the coupling axis 7.

With regard to the design of the anti-twist device 10, it is of course also possible to swap the arrangement of the projection 18 and the recess 19, i.e. to arrange the projection 18 on the distal part 6 of the interface 4 and the recess 19 on the proximal part 5 of the interface 4, without thereby changing the functioning of the anti-twist device 10.

The pitch of the threaded connection 9, i.e. the external thread 13 and the internal thread 14, is designed such that the mechanical anti-twist device 10 and the electrical contacts 11 and 12 come into operative connection with one another after 3.5 revolutions of the proximal part 5 of the interface 4 and the distal part 6 of the interface 4 relative to one another.

The figure in Fig. 3 also shows the structure of the electrical contacting of the coupling mechanism by means of the electrical contacts 11 and 12. In the embodiment shown, the electrical contacts 11 of the proximal part

5 of the interface 4 as spring contact pins 20 and the electrical contacts 12 of the distal part 6 of the interface 4 as contact surfaces 21 that come into operative connection with the spring contact pins 20.

Spring pin contacts 20 do not create the desired electrical contact by simply inserting or touching the contacts on both sides, but only by Exerting a certain contact pressure, whereby a spring-loaded contact pin is pressed in to establish the electrical contact. In conjunction with the threaded connection 9, this ensures that the electrical contact only occurs when the threaded connection 9 is tightened sufficiently to press the spring contact pins 20 in far enough using the contact surfaces 21 as abutments so that the electrical contact is made.

With regard to the design of the electrical contacts 11 and 12, it is of course also possible to swap the arrangement of the spring contact pins 20 and the contact surfaces 21, i.e. to arrange the spring contact pins 20 on the distal part 6 of the interface 4 and the contact surfaces 21 on the proximal part 5 of the interface 4, without thereby changing the functioning of the electrical contact.

The electrical contacts 11 and 12 also have sensors or chips for identifying the components connected to one another via the electrical contacts 11 and 12. For example, the holding arm 2 can recognize which load has been attached to the distal side in order to enable corresponding automatic weight compensation.

The electrical contact created by means of the electrical contacts 11 and 12 serves to release and re-lock the joints of the holding arm 2, for which purpose the distal part 6 of the interface 4 can be connected to corresponding control elements on the image recording unit 3 via a cable 22. The power supply of the image recording unit 3 and the transmission of the image data take place independently of the interface 4 via separate cable connections (not shown).

An interface 4 for a surgical image acquisition system 1 constructed as described above and shown in the figure is characterized in that a secure mechanical connection and an easy-to-use electrical connection are ensured with a compact design.

The drawings, the description and the claims contain numerous features in combination. It is understood that the features mentioned above can be used not only in the combination specified, but also in other combinations or on their own, without deviating from the scope of the present invention. The invention relates to an interface 4 for a surgical image recording system 1, with a proximal part 5 mounted on a support arm 2 and with a distal part 6 mounted on an image recording unit 3, wherein the proximal part 5 and the distal part 6 can be connected to one another along a coupling axis 7 by means of a coupling mechanism 8 in order to secure the image recording unit 3 to the support arm 2. In order to create an interface 4 for a surgical image recording system 1 which ensures a secure mechanical connection and an easy-to-use electrical connection with a compact design, it is proposed according to the invention that the coupling mechanism 8 is designed as a simultaneous mechanical and electrical coupling mechanism 8, wherein the mechanical coupling takes place via a threaded connection 9 with additional anti-twist protection 10 and the electrical coupling takes place via electrical contacts 11, 12 which come into operative connection with one another.

list of reference symbols

1 surgical image acquisition system

2 holding arms

3 image acquisition unit

4 interface

5 proximal part (interface)

6 distal part (interface)

7 coupling axis

8 coupling mechanism

9 threaded connection

10 anti-twist device

11 electrical contact (proximal part)

12 electrical contact (distal part)

13 external threads

14 internal threads

15 rings

16 recessed grip

17 spring pin

18 lead

19 deepening

20 spring contact pins

21 contact surface

22 cables

Claims

patent claims 1. Interface (4) for a surgical image recording system (1), with a proximal part (5) mounted on a holding arm (2) and with a distal part (6) mounted on an image recording unit (3), wherein the proximal part (5) and the distal part (6) can be connected to one another along a coupling axis (7) by means of a coupling mechanism (8) for securing the image recording unit (3) to the holding arm (2), characterized in that the coupling mechanism (8) is designed as a simultaneous mechanical and electrical coupling mechanism (8), wherein the mechanical coupling takes place via a threaded connection (9) with additional anti-twist protection (10) and the electrical coupling takes place via electrical contacts (11, 12) which come into operative connection with one another. 2. Interface (4) according to claim 1, characterized in that to form the anti-twist device (10), the proximal part (5) and the distal part (6) engage with each other in a form-fitting manner at least in sections. 3. Interface (4) according to claim 2, characterized in that for the formation of the positive anti-twist device (10) on the proximal part (5) or on the distal part (6) a projection (18) projecting forward in the direction of the coupling axis (7) and having a non-circular circumference is formed and a recess (19) having a non-circular circumference is formed on the corresponding distal part (6) or proximal part (5) for receiving the non-circular projection (18). 4. Interface (4) according to one of claims 1 to 3, characterized in that for forming the threaded connection (9) on the proximal part (5) or on the distal part (6) a threaded connection (13) provided with an external thread and rotating around the coupling axis (7) a freely rotatable ring (15) is mounted, via which the external thread (13) can be screwed into an internal thread (14) of the corresponding distal part (6) or proximal part (5). 5. Interface (4) according to claim 4, characterized in that grip recesses (16) are formed on the ring (15). 6. Interface (4) according to claim 4 or 5, characterized in that spring pins (17) pointing radially towards the proximal part (5) or distal part (6) are arranged on the underside of the ring (15) facing the associated proximal part (5) or distal part (6), which spring pins engage with spring-loaded locking elements in corresponding receptacles on the proximal part (5) or distal part (6). 7. Interface (4) according to one of claims 1 to 6, characterized in that the electrical contacts (11, 12) are designed as spring contact pins (20) and as corresponding contact surfaces (21) which come into operative connection with the spring contact pins (20). 8. Interface (4) according to one of claims 1 to 7, characterized in that the pitch of the threaded connection (9) is designed such that the mechanical anti-twist device (10) and the electrical contacts (11, 12) engage relative to one another after 3.5 revolutions of the proximal part (5) and the distal part (6). 9. Interface (4) according to one of claims 1 to 8, characterized in that the electrical contacts (11 and 12) have sensors for identifying the components connected to one another via the electrical contacts (11 and 12).