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CN-121987273-A - Handle assembly and sleeve assembly for medical instrument, and medical instrument

CN121987273ACN 121987273 ACN121987273 ACN 121987273ACN-121987273-A

Abstract

A handle assembly and a cannula assembly for a medical device, a medical device are provided. The medical instrument comprises a sleeve assembly, a handle assembly and a power unit, wherein the handle assembly is detachably connected with the sleeve assembly, the power unit is accommodated in the handle assembly and is connected with the sleeve assembly, and the clamping structure is clamped with the first connecting part so that the sleeve assembly and the handle assembly are detachably connected. The medical instrument can reduce the difficulty of cleaning and sterilizing the sleeve assembly after operation.

Inventors

  • LU SHAOLEI
  • ZHANG ZHIXING

Assignees

  • 宁波海泰科迈医疗器械有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (16)

  1. 1. A handle assembly for a medical instrument, the medical instrument including a cannula assembly and a power unit, the handle assembly comprising: a first housing portion configured to house the power unit therein, Wherein the first housing portion includes a first connection portion configured to connect with the cannula assembly, the first connection portion including an unlock switch configured to unlock the cannula assembly from the handle assembly when subjected to an external force.
  2. 2. The handle assembly of claim 1, wherein the first connection portion further comprises a snap-fit assembly configured to snap-fit with a proximal end of the cannula assembly to detachably lock-connect the cannula assembly with the handle assembly.
  3. 3. The handle assembly of claim 2, wherein the snap assembly comprises an adjacently disposed detent and a snap groove, the snap groove configured to receive the proximal end of the cannula assembly, the detent configured to limit movement of the proximal end of the cannula assembly in a distal direction such that the cannula assembly and the handle assembly are in a locked state.
  4. 4. A handle assembly according to claim 3, wherein the unlocking switch is a pressing structure slidably provided on the first housing part, the pressing structure including a key and a first elastic member, one end of the first elastic member being fixed in the first housing part, the other end of the first elastic member being connected to the key.
  5. 5. The handle assembly of claim 4, wherein the pressing structure is slidable in a radial direction of the handle assembly, the clamping groove is defined by the pressing structure and the clamping piece, the clamping groove is at least partially located in a sliding direction of the pressing structure, and the clamping groove is at least partially located near the clamping piece.
  6. 6. The handle assembly of any of claims 1-5, wherein the first connection portion is located at a distal end of the handle assembly and has a connection cavity with an opening at a distal end and a bottom surface at a proximal end, the handle assembly further comprising an abutment structure disposed in the connection cavity configured to abut the proximal end of the cannula assembly, the abutment structure protruding from the bottom surface of the connection cavity.
  7. 7. A cannula assembly for a medical instrument, the medical instrument including a handle assembly, the cannula assembly comprising: Sleeve part, and A second housing portion connected to a proximal end of the cannula portion, The second shell part is provided with a second connecting part, the second connecting part comprises a buckle structure, the buckle structure is configured to be in clamping connection with the handle assembly so as to lock and connect the sleeve assembly with the handle assembly, and the buckle structure is disconnected with the handle assembly when the sleeve assembly is acted by external force so as to unlock the sleeve assembly and the handle assembly.
  8. 8. The cannula assembly of claim 7, wherein the snap feature comprises a snap feature configured to snap with a distal end of the handle assembly and a second resilient member having one end secured to the second connection portion and the other end connected to the snap feature.
  9. 9. The cannula assembly of claim 8, wherein the clip portion includes a clip body and a projection protruding from the clip body in a radial direction of the cannula assembly.
  10. 10. The cannula assembly of claim 9, wherein the projection has a top surface and a proximal ramp configured to be pressed to move the catch radially to slide the projection into the distal end of the handle assembly to form a snap fit, the top surface configured to be pressed to move the catch radially to disengage the projection from the distal end of the handle assembly.
  11. 11. The cannula assembly according to any of claims 7-10, wherein the second connection part further comprises a third elastic member and at least one thimble, each thimble being arranged in an axial direction of the cannula assembly, one end of the third elastic member being fixed to the second connection part and the other end being connected to a distal end of the thimble, the thimble being configured to abut the handle assembly when the cannula assembly and the handle assembly are in a locked state, the third elastic member being configured to push the cannula assembly in a distal direction when the snap structure breaks the snap connection with the handle assembly.
  12. 12. A medical device, comprising: the cannula assembly of any one of claims 1-6; The handle assembly of any of claims 7-11, configured to be removably coupled to the cannula assembly, and A power unit received in the handle assembly and connected with the sleeve assembly; the clamping structure is clamped with the first connecting part, so that the sleeve assembly and the handle assembly are detachably connected.
  13. 13. The medical device of claim 12, wherein when the unlocking switch is acted upon by an external force, the snap feature is disengaged from the first connection portion by the external force transmitted by the unlocking switch to unlock the cannula assembly from the handle assembly.
  14. 14. A medical device, comprising: The cannula assembly of any of claims 3-5; The handle assembly of any of claims 9-11, configured to be removably coupled to the cannula assembly, and A power unit received in the handle assembly and connected with the sleeve assembly; the protruding portion of the buckling portion is matched with the clamping groove and is contained in the clamping groove, so that the buckling structure is clamped with the first connecting portion, and the sleeve assembly and the handle assembly are detachably connected.
  15. 15. A medical device, comprising: The cannula assembly of any of claims 4-5; the handle assembly of any of claims 10-11, configured to be removably coupled to the cannula assembly, and A power unit received in the handle assembly and connected with the sleeve assembly; The protruding portion of the buckling portion is matched with the clamping groove and is contained in the clamping groove, the top surface of the protruding portion is abutted to the key, the far end of the protruding portion is abutted to the clamping piece, the buckling structure is enabled to be in clamping connection with the first connecting portion, and the buckling portion is configured to: when the key is acted by external force and is transmitted to the protruding part, the buckling part moves radially to disconnect the protruding part from the clamping part, so that the sleeve assembly and the handle assembly are unlocked.
  16. 16. The medical device of any one of claims 12-15, wherein the medical device comprises a stapler.

Description

Handle assembly and sleeve assembly for medical instrument, and medical instrument Technical Field The present disclosure relates to a medical device and a handle assembly and a cannula assembly for 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. The proximal end of the cannula assembly is releasably connected to the handle assembly and the actuator assembly is releasably secured to the distal end of the cannula assembly. In minimally invasive surgery, an anastomat is passed through a penetrator into a passageway in a patient. The stapler can be a laparoscopic stapler, including an electric stapler. When the existing electric anastomat is used, an operator installs the electric anastomat on the handle assembly or removes the electric anastomat from the handle assembly by operating the sleeve assembly, the installation/removal structure on the sleeve assembly is complex, the cleaning and sterilization of the sleeve assembly after operation are not facilitated, if the electric anastomat is repeatedly used subsequently, the safety of an operation is affected, and the operation when the sleeve assembly is removed is inconvenient. In addition, the mounting/dismounting structure is easy to fatigue and damage after repeated plugging and unplugging operations for many times, so that the service life of the sleeve assembly is influenced, and the operation safety is possibly influenced. Disclosure of Invention At least one embodiment of the present disclosure provides a handle assembly for a medical instrument comprising a cannula assembly and a power unit, the handle assembly comprising a first housing portion configured to house the power unit therein, wherein the first housing portion comprises a first connection portion configured to connect with the cannula assembly, the first connection portion comprising an unlocking switch configured to unlock the cannula assembly from the handle assembly when subjected to an external force. According to a handle assembly provided in accordance with an embodiment of the present disclosure, the first connection portion further includes a snap-fit assembly configured to snap-fit with the proximal end of the cannula assembly to detachably lock-connect the cannula assembly with the handle assembly. According to an embodiment of the present disclosure, a handle assembly is provided, the clamping assembly including a clamping member and a clamping groove disposed adjacent to each other, the clamping groove configured to receive a proximal end of the cannula assembly, the clamping member configured to limit movement of the proximal end of the cannula assembly in a distal direction such that the cannula assembly and the handle assembly are in a locked state. According to the handle assembly provided by the embodiment of the disclosure, the unlocking switch is a pressing structure slidably arranged on the first shell part, the pressing structure comprises a key and a first elastic piece, one end of the first elastic piece is fixed in the first shell part, and the other end of the first elastic piece is connected with the key. According to the handle assembly provided by the embodiment of the disclosure, the pressing structure can slide along the radial direction of the handle assembly, the clamping groove is formed by surrounding the pressing structure and the clamping piece, at least part of the clamping groove is positioned in the sliding direction of the pressing structure, and at least part of the clamping groove is positioned at the near side of the clamping piece. According to a handle assembly provided by embodiments of the present disclosure, the first connection portion is located at a distal end of the handle assembly and has a connection cavity with an opening at the distal end and a bottom surface at the proximal end, the handle assembly further comprising an abutment structure disposed in the connection cavity, the abutment structure being configured to abut the proximal end of the cannula assembly, the abutment structure protruding from the bottom surface of the connection cavity. Embodiments of the present disclosure also provide a cannula assembly for a medical instrument including a handle assembly, the cannula assembly including a cannula portion, and a second housing portion connected to a proximal end of the cannula portion, the second housing portion having a second connection portion including a snap-fit structure configured to snap-fit with the handle assembly to lockingly connect the cannula assembly to the handle assembly and to disengage the snap-fit with the handle assembly when subjected to an external force to unlock the cannula assembly from the