GAS PASSAGE ADJUSTMENT MECHANISM, SMOKE EVACUATION SYSTEM, AND SURGICAL SYSTEM

Abstract

To provide a gas passage adjustment mechanism that can be reduced in size. A smoke evacuator 1 (gas passage adjustment mechanism) includes a pressing member (12), a solenoid (13), a tube holder (14), a first protruding member (15), and at least one second protruding member (16). The first protruding member (15) is provided at a position facing a pressing position (P) where the pressing member (12) presses the tube (11), and protrudes from the tube holder (14) in a direction toward the pressing member (12). The at least one second protruding member (16) is disposed at an upstream position and a downstream position of the passage with respect to the pressing position (P), and protrudes toward a side of the tube (11).

Description

Claims

1. A gas passage adjustment mechanism comprising: a pressing member configured to press a tube comprising a passage for gas;a solenoid configured to move the pressing member and configured to open and close the passage through the movement;a tube holder configured to hold the tube from a side opposite to the pressing member;a first protruding member provided at a position facing a pressing position at which the pressing member presses the tube, the first protruding member protruding from the tube holder in a direction toward the pressing member; andat least one second protruding member disposed at an upstream position or a downstream position of the passage with respect to the pressing position, the at least one second protruding member protruding toward a side of the tube.

2. The gas passage adjustment mechanism according to claim 1, wherein in a cross section of the gas passage adjustment mechanism taken along a plane comprising a central axis of the tube and a central axis of the pressing member, a distance between a tip of the first protruding member and a tip of the at least one second protruding member in a direction parallel to a movement direction of the pressing member is smaller than an outer diameter of the tube in an unloaded state.

3. The gas passage adjustment mechanism according to claim 1, wherein the tube holder comprises a pair of holding members configured to hold the tube at a predetermined position of the tube holder, each of the pair of holding members being provided at a respective one of an upstream side and a downstream side of the passage with respect to the pressing position.

4. The gas passage adjustment mechanism according to claim 1, wherein each of a pair of the at least one second protruding member is disposed at a respective one of an upstream position and a downstream position of the passage with respect to the pressing position.

5. A gas passage adjustment mechanism comprising: a pressing member configured to press a tube comprising a passage for gas;a solenoid configured to move the pressing member and configured to open and close the passage through the movement;a tube holder comprising a clamping portion configured to clamp a part of the tube from a side opposite to the pressing member; anda first protruding member provided at a position facing a pressing position at which the pressing member presses the tube, the first protruding member protruding from the tube holder in a direction toward the pressing member.

6. The gas passage adjustment mechanism according to claim 5, wherein the tube holder comprises a groove configured to hold the tube at a predetermined position of the tube holder.

7. The gas passage adjustment mechanism according to claim 5, wherein the tube holder comprises a pair of the clamping portions.

8. The gas passage adjustment mechanism according to claim 1, wherein the passage is opened at the pressing position when the solenoid is not energized, and the passage is closed at the pressing position when the solenoid is energized.

9. The gas passage adjustment mechanism according to claim 1, wherein the solenoid is a latching solenoid.

10. The gas passage adjustment mechanism according to claim 9, wherein the latching solenoid is configured to moves the pressing member in a pressing direction when a pulse voltage is applied, holds the pressing member by a magnetic force of a permanent magnet at a position after the movement, and move the pressing member in a direction opposite to the pressing direction when the pulse voltage is applied again.

11. The gas passage adjustment mechanism according to claim 1, wherein a distance between inner wall surfaces of the tube is equal to or less than 3 mm at a position where the first protruding member comes into contact with the tube.

12. The gas passage adjustment mechanism according to claim 1, wherein a distance between inner wall surfaces of the tube is equal to or less than 1.5 mm at a position where the first protruding member comes into contact with the tube.

13. A smoke evacuation system comprising: the gas passage adjustment mechanism according to claim 1, wherein the gas passage adjustment mechanism is configured to operate in conjunction with a surgical cautery instrument.

14. The smoke evacuation system according to claim 13, wherein the smoke evacuation system is configured to be used in laparoscopic surgery.

15. A surgical system comprising: the smoke evacuation system according to claim 13;a trocar that is configured to be used in laparoscopic surgery;the surgical cautery instrument; anda suction device configured to suck gas in an abdominal cavity.