CN-122004966-A - Medical apparatus and instruments

Abstract

A medical device is provided. The medical device comprises a sleeve assembly, an actuator assembly, a locking assembly and a limiting piece, wherein the sleeve assembly comprises a sleeve part and a shell arranged at the proximal end of the sleeve part, the actuator assembly is detachably connected with the distal end of the sleeve assembly and is configured to rotate around the axis of the sleeve assembly when connected with the sleeve assembly, the locking assembly comprises a limiting piece and an operating piece which are connected with each other, the limiting piece is configured to move along the axial direction of the sleeve assembly to limit the rotating movement of the actuator assembly, and the operating piece is configured to rotate to drive the limiting piece to move along the axial direction of the sleeve assembly. The rotatable operating piece is adopted for control, and labor can be saved compared with other control modes during control.

Inventors

• LU SHAOLEI
• ZHANG ZHIXING

Assignees

• 宁波海泰科迈医疗器械有限公司

Dates

Publication Date

20260512

Application Date

20241108

Claims (18)

1. 1. A medical device, comprising: the sleeve assembly comprises a sleeve part and a shell arranged at the proximal end of the sleeve part; an actuator assembly removably coupled to a distal end of the cannula assembly and configured to be rotatable about an axis of the cannula assembly when coupled thereto, and The locking assembly comprises a limiting piece and an operating piece which are connected with each other, wherein, The stop is configured to limit rotational movement of the actuator assembly in an axial direction of the sleeve assembly, The operating member is configured to be rotatable to bring the stopper into movement in an axial direction of the sleeve assembly.
2. 2. The medical device of claim 1, wherein the locking assembly further comprises a force conversion assembly within the housing, the operating member being at least partially disposed outside the housing, the force conversion assembly configured to convert rotational movement of the operating member into axial movement of the limiter.
3. 3. The medical device of claim 2, wherein the proximal end of the stop has a first mating portion and the force conversion assembly includes a connector having a second mating portion, the first and second mating portions being matingly connected.
4. 4. The medical device of claim 3, wherein one of the first mating portion and the second mating portion includes a protrusion and the other of the first mating portion and the second mating portion includes a recess that mates with the protrusion.
5. 5. The medical device of any one of claims 2-4, wherein the force conversion assembly further comprises a dial through which the operating member is coupled to the connector.
6. 6. The medical device of claim 5, wherein the operating member has a shaft, the dial has a through hole receiving the shaft, the shaft mates with the through hole, and the operating member is configured to rotate the dial.
7. 7. The medical device of claim 6, wherein the operating member further has at least one detent projection structure disposed about the rotational axis, and the dial has at least one detent groove structure mated with the detent projection structure to fix the operating member relative to the dial for rotation of the dial.
8. 8. The medical device of claim 5, wherein the dial has an eccentrically disposed drive shaft, the connector has a slide bore extending radially of the cannula assembly, the drive shaft is disposed within the slide bore, and the operating member is configured to rotate the dial to move the drive shaft within the slide bore to drive the connector to move axially of the cannula assembly to move the limiter.
9. 9. The medical instrument of claim 6, wherein the force conversion assembly further comprises a retaining ring configured to secure the operating member to the dial so as to limit movement of the operating member in the direction of extension of the shaft.
10. 10. The medical device of claim 6, wherein the housing has a receiving slot, the operating member is disposed within the receiving slot, the receiving slot has a bottom surface, the bottom surface has a rotational shaft hole, and the rotational shaft of the operating member is coupled to the force conversion assembly through the rotational shaft hole.
11. 11. The medical device of any one of claims 1-4, wherein the cannula assembly includes a first inner tube and a first outer tube, the first inner tube being positioned within the first outer tube, a distal end of the first inner tube having a blocking portion configured to block circumferential rotation of the actuator assembly and a rotational channel, a proximal end of the actuator assembly configured to be rotatable within the rotational channel of the cannula assembly in the circumferential direction of the cannula assembly when connected to the cannula assembly, and movement in the axial direction of the cannula assembly being restricted when rotated within the rotational channel.
12. 12. The medical device of claim 11, wherein the proximal end of the actuator assembly includes a mounting structure having a boss configured to be detachably mounted within the rotational channel.
13. 13. The medical device of claim 12, wherein the proximal end of the actuator assembly includes a mounting tube including a second inner tube and a second outer tube, the second outer tube being located outside the second inner tube, the proximal end of the second inner tube having the mounting structure.
14. 14. The medical device of claim 12, wherein the distal end of the limiter has a locking portion, the limiter being configured to be in a first position to limit at least rotation of the boss within the rotational channel by the locking portion to place the actuator assembly in a locked state and to be in a second position to yield to the boss of the actuator assembly to place the actuator assembly in an unlocked state.
15. 15. The medical device of claim 14, wherein the locking portion includes at least one locking surface and the blocking portion includes at least one blocking surface, the at least one locking surface and the at least one blocking surface mating with at least two sides of the boss to limit rotation of the boss within the rotational channel.
16. 16. The medical device of claim 14, wherein the distal end of the stop is provided with a cantilever arm, the locking portion being located on the cantilever arm.
17. 17. The medical device of claim 16, wherein the locking assembly further comprises a spring, the cantilever arm having a slot extending axially of the cannula assembly, the spring being positioned within the slot, the stop being configured to return distally axially of the cannula assembly under the spring force of the spring.
18. 18. The medical device of any one of claims 1-4, wherein the medical device is a stapler.

Description

Medical apparatus and instruments Technical Field The present disclosure relates to a medical device. Background The medical device includes a stapler. The anastomat can be used for the separation, excision and/or anastomosis establishment of organs, tissues or blood vessels in a body, and is suitable for various open or minimally invasive operations. Generally, a stapler includes a handle assembly, a sleeve assembly, and an actuator assembly. An actuator assembly is releasably secured to the distal end of the cannula assembly. The actuator assembly includes a distal end actuator. In minimally invasive surgery, an anastomat is introduced into a patient through a puncture outfit. The stapler may be a laparoscopic stapler. The actuator assembly is installed on the sleeve assembly, the actuator assembly is fixed through a locking structure, the locking assembly comprises a limiting piece and a poking button, the poking button in the prior art is installed on the knob along the axial direction of the sleeve assembly, the poking button assembly axially moves the limiting piece to lock the actuator assembly, for example, the poking button is axially moved to unlock or lock a part on the actuator assembly, and a large gap exists between the poking button and the shell of the sleeve assembly, so that the instrument is easily exposed in a bacteria environment, and the repeated use of the sleeve assembly is not facilitated. Disclosure of Invention At least one embodiment of the present invention provides a medical device comprising a cannula assembly comprising a cannula portion and a housing disposed at a proximal end of the cannula portion, an actuator assembly removably coupled to a distal end of the cannula assembly and configured to be rotatable about an axis of the cannula assembly when coupled to the cannula assembly, and a locking assembly comprising an interconnecting stop member configured to move axially of the cannula assembly to limit rotational movement of the actuator assembly and an operating member configured to be rotatable to move the stop member axially of the cannula assembly. For example, the locking assembly further includes a force conversion assembly located within the housing, the operating member being at least partially disposed outside of the housing, the force conversion assembly being configured to convert rotational movement of the operating member into axial movement of the limiter. For example, the proximal end of the stop member has a first mating portion and the force conversion assembly includes a connector having a second mating portion, the first mating portion and the second mating portion being matingly connected. For example, one of the first mating portion and the second mating portion includes a protrusion, and the other of the first mating portion and the second mating portion includes a groove that mates with the protrusion. For example, the force conversion assembly further comprises a turntable through which the operating member is connected to the connecting member. For example, the operating member has a rotation shaft, the turntable has a through hole for receiving the rotation shaft, the rotation shaft is matched with the through hole, and the operating member is configured to rotate the turntable. For example, the operating member further has at least one positioning protrusion structure disposed around the rotating shaft, and the turntable has at least one positioning groove structure matched with the positioning protrusion structure, so that the operating member and the turntable are relatively fixed to drive the turntable to rotate. For example, the turntable has an eccentrically disposed drive shaft, the connector has a sliding hole extending in a radial direction of the sleeve assembly, the drive shaft is disposed in the sliding hole, and the operating member is configured to rotate the turntable to drive the drive shaft to move in the sliding hole to drive the connector to move in an axial direction of the sleeve assembly to drive the limiter to move. For example, the force conversion assembly further includes a retaining ring configured to secure the operating member to the turntable so as to limit movement of the operating member in the direction of extension of the spindle. For example, the housing has a receiving groove in which the operating member is disposed, the receiving groove having a bottom surface having a rotation shaft hole through which the rotation shaft of the operating member is connected to the force conversion assembly. For example, the cannula assembly includes a first inner tube and a first outer tube, the first inner tube being positioned within the first outer tube, a distal end of the first inner tube having a blocking portion configured to block circumferential rotation of the actuator assembly and a rotational channel, a proximal end of the actuator assembly being configured to rotate within the rotational channel of the cannula as