Surgical instruments with rotation stop devices

Patent metadata

Field	Value
Publication number	US-11294414-B2
Application number	US-201815946016-A
Country	US
Kind code	B2
Filing date	Apr 5, 2018
Priority date	Apr 5, 2018
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Surgical instruments with rotation stop devices and related methods are disclosed herein, e.g., for providing limited rotation between first and second components of the surgical instrument in a range greater than 360 degrees. Exemplary rotation stop devices can have a low profile and can include various features to facilitate packaging of the device within a larger instrument.

First claim

The invention claimed is:

1. A surgical instrument, comprising:
a proximal handle;
a shaft extending from the handle and having a distally-mounted visualization device;
a knob configured to rotate relative to the handle about a rotation axis to move the visualization device; and
a rotation stop that limits rotation of the knob relative to the handle to a range greater than 360 degrees, the rotation stop being disposed at least partially within the proximal handle, and the rotation stop further comprising:
a first component;
a second component, the second component being configured to rotate relative to the first component about a stop rotation axis;
a retention feature extending from the second component and through the first component such that the retention feature extends beyond a face of the first component to maintain an axial position of the first component relative to the second component;
a stop shaft extending from the first component along the stop rotation axis; and
a nut having an opening in which the stop shaft is received, the nut being non-rotatably coupled to the second component,
wherein the nut travels along the stop shaft between first and second rotation limits to limit rotation of the first component relative to the second component about the stop rotation axis.

2. The instrument of claim 1 , further comprising a sensor configured to detect a rotational position of the knob and to correct an electronic display of images captured by the visualization device based on the detected position.

3. The instrument of claim 1 , wherein the stop shaft comprises a threaded shaft and the nut comprises a threaded nut, the threaded shaft being configured to rotate with the knob and the nut being non-rotatably captured by the handle.

4. The instrument of claim 3 , further comprising a potentiometer having a shaft coupled to or formed integrally with the threaded shaft.

5. The instrument of claim 1 , wherein the nut travels along the stop shaft between first and second rotation limits to limit rotation of the knob relative to the handle about the rotation axis.

6. The instrument of claim 5 , wherein the first rotation limit is a surface of the knob that faces the handle and the second rotation limit is a surface of the handle that faces the knob.

7. The instrument of claim 5 , wherein the distance between the first and second rotation limits remains constant as the knob is rotated relative to the handle.

8. The instrument of claim 5 , wherein the distance between the first and second rotation limits is less than or equal to 10 mm.

9. The instrument of claim 5 , further comprising a throughhole that extends through the knob and the stop shaft.

10. The instrument of claim 5 , wherein the nut and the stop shaft are received within a cavity of the handle.

11. The instrument of claim 1 , further comprising an elongate member that crosses a rotation plane defined between the knob and the handle, the elongate member having a first end fixed to a portion of the instrument distal to the rotation plane and a second end fixed to a portion of the instrument proximal to the rotation plane.

12. The instrument of claim 11 , wherein the elongate member comprises an optical fiber and wherein the first end of the elongate member is coupled to a light source proximal to the rotation plane and the second end of the elongate member is configured to direct light into a surgical field adjacent the visualization device.

13. The instrument of claim 11 , wherein the elongate member comprises an electrical conductor and wherein the first end of the elongate member is coupled to a controller disposed proximal to the rotation plane and the second end of the elongate member is coupled to the visualization device.

14. The instrument of claim 11 , wherein the elongate member extends through a throughhole of the rotation stop.

15. The instrument of claim 11 , wherein the throughhole is formed in the stop shaft of the rotation stop.

16. The instrument of claim 1 , wherein the rotation stop limits rotation of the knob relative to the handle to a range less than or equal to about 720 degrees.

17. A rotation stop device, comprising:
a first component having a proximal end that is proximally facing;
a second component, the second component being configured to rotate relative to the first component about a rotation axis;
a shaft extending from the first component along the rotation axis, the shaft having a distal end that is distally facing;
a retention feature extending from the second component and through the first component such that the retention feature extends beyond a face of the first component to maintain an axial position of the first component relative to the second component;
a throughhole that extends continuously from the proximal end of the first component to the distal end of the shaft; and
a nut having an opening in which the shaft is received, the nut being non-rotatably coupled to the second component,
wherein the nut travels along the shaft between first and second rotation limits to limit rotation of the first component relative to the second component about the rotation axis.

18. The device of claim 17 , wherein the first and second rotation limits limit rotation of the first component relative to the second component about the rotation axis to a range greater than 360 degrees.

19. The device of claim 17 , wherein the first rotation limit is a surface of the first component that faces the second component and the second rotation limit is a surface of the second component that faces the first component.

20. The device of claim 17 , wherein the distance between the first and second rotation limits remains constant as the first component is rotated relative to the second component.

21. The device of claim 17 , wherein the distance between the first and second rotation limits is less than or equal to 10 mm.

22. The device of claim 17 , wherein the throughhole extends through the second component.

23. The device of claim 17 , wherein the retention feature comprises one or more spring tabs that extend from the second component and through the throughhole.

24. The device of claim 17 , further comprising a potentiometer having a shaft received within the throughhole.

25. The device of claim 17 , wherein the nut and the shaft are received within a cavity of the second component.

26. The device of claim 17 , wherein the nut includes an inner thread mated to an outer thread of the shaft.

27. The device of claim 17 , wherein the nut includes a pin that rides within a helical groove of the shaft.

28. The device of claim 17 , further comprising a sensor that detects a relative rotational position of the first and second components.

29. The device of claim 17 , wherein the sensor is at least one of a potentiometer, a Hall effect sensor, and an optical encoder.

30. The device of claim 17 , further comprising a wire positioned in the throughhole.

31. A rotation stop device, comprising:
a first component;
a second component, the second component being configured to rotate relative to the first component about a rotation axis;
a shaft extending from the first component along the rotation axis;
a retention feature that maintains an axial position of the first component relative to the second component by ex

Assignees

• Medos Int Sarl

Inventors

• Shainwald Mark
• Marks Jacob A

Classifications

• G05G5/04 Primary

  Stops for limiting movement of members, e.g. adjustable stop (G05G5/03, G05G5/05, G05G5/28 take precedence) · CPC title

• A61B1/00147

  Holding or positioning arrangements · CPC title

• A61B1/00066 Primary

  Proximal part of endoscope body, e.g. handles (A61B1/0052 takes precedence) · CPC title

• A61B17/2841

  Handles · CPC title

• F16M2200/021

  for rotational movement · CPC title