Suture tightening device

1 . A suture tightening device, comprising: a first thread take-up wheel, a second thread take-up wheel, and a thread gear support detachably connected to an endoscope handle, wherein

the first thread take-up wheel is arranged at a space from the second thread take-up wheel, and the first thread take-up wheel and the second thread take-up wheel are separately in rotatable connection to the thread gear support;

wherein the thread gear support is connected with a bandage, and the bandage is bound to the endoscope handle.

2 . The suture tightening device according to claim 1 , wherein the first thread take-up wheel and the second thread take-up wheel both comprise: a gear body, a first gear disk, and a second gear disk, wherein

the gear body, the first gear disk, and the second gear disk are arranged coaxially, wherein

the first gear disk is arranged at a space from the second gear disk; the first gear disk and the second gear disk are separately connected to the gear body; and a thread winding groove is formed between the first gear disk and the second gear disk.

3 . The suture tightening device according to claim 2 , wherein the first thread take-up wheel and/or the second thread take-up wheel are provided with a thread clamping groove.

4 . The suture tightening device according to claim 2 , wherein the first thread take-up wheel and/or the second thread take-up wheel are provided with a plurality of position limitation parts, and the plurality of position limitation parts are arranged at intervals around a gear shaft.

5 . The suture tightening device according to claim 4 , wherein elastic position limitation members are mounted on the thread gear support; the elastic position limitation members are fitted to the position limitation parts; and the elastic position limitation members tend to keep fit with the position limitation parts.

6 . The suture tightening device according to claim 5 , wherein the elastic position limitation members support the first thread take-up wheel and the second thread take-up wheel, so as to prevent the first thread take-up wheel and the second thread take-up wheel from rotating back, and to keep sutures to be tightened extending from the endoscope handle to the first thread take-up wheel and the second thread take-up wheel respectively;

the position limitation parts are provided with beveled surfaces, wherein when the first thread take-up wheel or the second thread take-up wheel is rotated to tighten the sutures, the beveled surfaces push the elastic position limitation members, so that the elastic position limitation members remove from the position limitation parts; or

when the elastic position limitation members incline along a circumference of the thread take-up wheel, and the first thread take-up wheel or the second thread take-up wheel is rotated to tighten the sutures, the position limitation parts push the elastic position limitation members, so that the elastic position limitation members slip out relative to the position limitation parts.

7 . The suture tightening device according to claim 1 , wherein an angle exists between an axis of the first thread take-up wheel and an axis of the second thread take-up wheel, and a bisector of the angle between the axis of the first thread take-up wheel and the axis of the second thread take-up wheel intersects an axis of an endoscope working cavity of the endoscope handle.

8 . The suture tightening device according to claim 1 , wherein a first clamping arm and a second clamping arm are movably mounted on the thread gear support, and a clamping area is formed between the first clamping arm and the second clamping arm.

9 . The suture tightening device according to claim 8 , wherein the first clamping arm is provided with a first tooth part; the second clamping arm is provided with a second tooth part fitted to the first tooth part; the first tooth part cooperates with the second tooth part; and the clamping area is formed between the first tooth part and the second tooth part.

10 . The suture tightening device according to claim 8 , wherein one end of the first clamping arm and one end of the second clamping arm are separately pivoted to the thread gear support, and the other end of the first clamping arm is opposite to the other end of the second clamping arm to form the clamping area.

11 . The suture tightening device according to claim 8 , wherein the thread gear support is elastic, and the thread gear support squeezes the first clamping arm and the second clamping arm, so that the first clamping arm and the second clamping arm tend to form an angle.

12 . The suture tightening device according to claim 8 , wherein in an unlocking state, an opening is formed on one side of the clamping area, wherein

a clamped part of a second surgical instrument enters the clamping area through the opening along a first direction, and the first clamping arm and the second clamping arm are pushed to simultaneously switch to a locking state, so that an opening degree of the opening is reduced or closed; and

when the clamped part, the first clamping arm, or the second clamping arm is operated in a direction opposite to the first direction, the first clamping arm and the second clamping arm are simultaneously switched to the unlocking state, so that the clamped part is removed via the opening.

13 . The suture tightening device according to claim 12 , wherein the first clamping arm is provided with a first position limitation groove; the second clamping arm is provided with a second position limitation groove opposite to the first position limitation groove; and the clamping area is formed between the first position limitation groove and the second position limitation groove, wherein

in the locking state, the thread gear support squeezes the first clamping arm and the second clamping arm to deflect to the first direction, and the second surgical instrument is clamped between the first position limitation groove and the second position limitation groove; and

in the unlocking state, the thread gear support squeezes the first clamping arm and the second clamping arm to deflect to a second direction, so as to enlarge an opening degree of the clamping area between the first position limitation groove and the second position limitation groove.

14 . The suture tightening device according to claim 12 , wherein the thread gear support is provided with a locking and position limitation structure, or the first clamping arm and/or the second clamping arm are provided with the locking and position limitation structure, wherein

the locking and position limitation structure is configured to prevent the first clamping arm and the second clamping arm from continuing to deflect to the first direction during the locking state.

15 . The suture tightening device according to claim 8 , wherein the thread gear support is further provided with a crossbar, and the crossbar is provided with an avoiding groove, wherein the avoiding groove is configured to accommodate a second surgical instrument, and/or to prevent the second surgical instrument from continuing to move to a first direction.

16 . The suture tightening device according to claim 10 , wherein the thread gear support is elastic, and the thread gear support squeezes the first clamping arm and the second clamping arm, so that the first clamping arm and the second clamping arm tend to form an angle.

17 . The suture tightening device according to claim 13 , wherein the thread gear support is provided with a locking and position limitation structure, or the first clamping arm and/or the second clamping arm are provided with the locking and position limitation structure, wherein

the locking and position limitation structure is configured to prevent the first clamping arm and the second clamping arm from continuing to deflect to the first direction during the locking state.