CN-121987271-A - Housing assembly, handle assembly and medical instrument

CN121987271ACN 121987271 ACN121987271 ACN 121987271ACN-121987271-A

Abstract

A housing assembly, a handle assembly, and a medical device are provided. The housing assembly includes a housing body, a cover plate assembly disposed at a distal end of the housing body, and a sleeve connection structure at least partially disposed between the distal end of the housing body and the cover plate assembly, the sleeve connection structure configured to be circumferentially rotatable. The sleeve connecting structure is arranged on the shell assembly, so that the postoperative cleaning and sterilizing difficulty of the sleeve assembly is reduced.

Inventors

Gu Chengsuo
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. A housing assembly for a medical device, comprising: A case main body; a cover plate assembly disposed at a distal end of the housing body, and And a sleeve connection structure disposed at a distal end of the housing body, and at least a portion of the sleeve connection structure is located between the housing body and the cover plate assembly, the sleeve connection structure being configured to be circumferentially rotatable.
2. The housing assembly of claim 1, wherein the sleeve connection structure comprises a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves disposed within the sleeve core and respectively connected to both ends of the spring, the two sliding sleeves respectively being radially stopped relative to the sleeve core and being slidable in an axial direction of the sleeve connection structure.
3. The housing assembly of claim 2, wherein the distal end of the housing body has a first through hole, the cover assembly has a cover body having a second through hole, the distal and proximal ends of the sleeve core are in communication with the first and second through holes, respectively, and the sleeve core is circumferentially rotatable.
4. The housing assembly of claim 2, wherein at least one of the two sliding sleeves has a first sleeve portion and a second sleeve portion connected to each other, the first sleeve portion having an outer diameter smaller than an outer diameter of the at least a portion of the second sleeve portion, the first sleeve portion being further from the spring than the second sleeve portion, the second sleeve portion having a cavity that receives an end of the spring.
5. The housing assembly of claim 4, wherein one of the two sliding sleeves is disposed at a proximal end of the sleeve core and is configured to include a first receiving hole at a proximal end and the other of the two sliding sleeves is disposed at a distal end of the sleeve core and is configured to include a second receiving hole at a distal end.
6. The housing assembly of claim 4, wherein at least one end of the sleeve core has a blocking portion configured to axially block the second sleeve portion of the sliding sleeve disposed within the sleeve core to limit movement of the second sleeve portion out of the sleeve core.
7. The housing assembly of any of claims 2-6, wherein each of the two sliding sleeves and one of the sleeve cores has a radial projection, the other of the two sliding sleeves and the sleeve core has a groove, the projection is located within the groove and mates with the groove such that the sliding sleeve is radially and circumferentially arrested and axially slidable relative to the sleeve core.
8. The housing assembly of any of claims 2-6, further comprising a first gasket and/or a second gasket, wherein the first gasket is located between the housing body and the sleeve core and the second gasket is located between the cover plate assembly and the sleeve core.
9. The housing assembly of any of claims 2-6, wherein the cover plate assembly and the housing body are fixedly connected to secure the sleeve core.
10. A handle assembly for a medical device comprising a power unit and a housing assembly according to any one of claims 1-9, wherein the housing body comprises a first housing and a second housing, the first housing being rotatably connected to the second housing, the power unit being disposed in a cavity formed by the first housing and the second housing.
11. The handle assembly of claim 10, wherein the power unit comprises a drive rod having a mating shape with a proximal end of the sleeve connection structure and configured to be circumferentially rotatable about an axis of the sleeve connection structure and connected to the sleeve connection structure.
12. The handle assembly of claim 11, wherein the sleeve connection structure comprises a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves disposed within the sleeve core and respectively connected to both ends of the spring, the two sliding sleeves respectively being radially stopped relative to the sleeve core and being axially slidable along the sleeve connection structure; The drive rod and the end of the sliding sleeve at the proximal end have matching non-circular cross-sectional shapes, the sliding sleeve configured to: when the power unit is initially installed into the housing body, an end of the sliding sleeve abuts the driving rod; When the driving rod rotates to a specific circumferential position, the sliding sleeve axially slides under the pressure of the spring and is sleeved on the driving rod, so that the sleeve connecting structure is circumferentially stopped relative to the driving rod.
13. A medical device, comprising: The handle assembly of any one of claims 10-12, and A sleeve assembly is configured to be removably coupled to the handle assembly.
14. The medical device of claim 13, wherein the cannula assembly includes a lead screw having a mating non-circular cross-sectional shape with a distal end of the sleeve connection structure and configured to connect with the sleeve connection structure.
15. The medical device of claim 14, wherein the sleeve connection structure comprises a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves disposed within the sleeve core and respectively connected to both ends of the spring, the two sliding sleeves respectively being radially stopped relative to the sleeve core and slidable along an axial direction of the sleeve connection structure, the lead screw and an end of the sliding sleeve at a proximal end having a matching non-circular cross-sectional shape; the power unit further includes a controller configured to perform at least one of the following: S1, driving the driving rod to rotate to a specific circumferential position along a first direction so as to be connected with the sliding sleeve at the proximal end, and enabling the sleeve connecting structure to be circumferentially stopped relative to the driving rod; and S2, driving the driving rod to rotate along a second direction, and driving the sleeve connecting structure to rotate along the second direction, so that the screw rod is connected with the sliding sleeve at the far end, and the sleeve connecting structure is stopped circumferentially relative to the screw rod.
16. The medical device of claim 14, further comprising an actuator assembly including a jaw assembly and a cutting assembly, the actuator assembly being removably coupled to the distal end of the cannula assembly, the distal end of the lead screw being coupled to the cutting assembly, When the drive rod, the lead screw, and the sleeve connection structure are connected and stopped relative to the circumferential direction, the controller is further configured to perform at least one of the following steps: S3, driving the driving rod to rotate along the first direction so as to drive the screw rod to rotate along the first direction, thereby pushing the cutting assembly to move towards the distal end of the medical instrument to close the jaw assembly and/or cut tissue; and S4, driving the driving rod to rotate along the second direction so as to drive the screw rod to rotate along the second direction, thereby pulling the cutting assembly to move towards the proximal end of the medical instrument so as to open the jaw assembly.

Description

Housing assembly, handle assembly and medical instrument Technical Field The present disclosure relates to at least a housing assembly, a handle assembly, and a medical device. Background 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. In order to reduce environmental impact and reduce use costs, it is desirable to reuse a portion of the components in a powered stapler, such as in many cases, a powered reusable handle assembly, a cannula assembly, a disposable end effector, etc., that is selectively connected to the cannula assembly and the powered handle assembly prior to use, and then disconnected from the cannula assembly and the powered handle assembly after use, such that a portion of the components are disposed of or in some cases sterilized for reuse. In a common electric anastomat, a sleeve assembly is connected with a handle part, a connecting structure is arranged on the sleeve assembly, and a screw rod on the sleeve assembly is connected with a motor driving rod on the handle part through the connecting structure. However, the connecting structure is arranged on the sleeve assembly, the sleeve assembly is complex in structure, cleaning and sterilization after operation of the sleeve assembly are not facilitated, and the problem that the screw rod and the driving rod are not connected in place can exist, for example, the driving rod and the screw rod deviate, so that internal transmission of the electric anastomat is invalid. Disclosure of Invention At least one embodiment of the present disclosure relates to a housing assembly, a handle assembly, and a medical device. At least one embodiment of the present disclosure provides a housing assembly for a medical device including a housing body, a cover plate assembly disposed at a distal end of the housing body, and a sleeve connection structure disposed at the distal end of the housing body with at least a portion of the sleeve connection structure being located between the housing body and the cover plate assembly, the sleeve connection structure being configured to be circumferentially rotatable. For example, in the housing assembly provided in at least one embodiment of the present disclosure, the sleeve connection structure includes a sleeve core, a spring disposed in the sleeve core, and two sliding sleeves disposed in the sleeve core and respectively connected to two ends of the spring, the two sliding sleeves respectively radially stop with respect to the sleeve core and are slidable along an axial direction of the sleeve connection structure. For example, in the case of the housing assembly provided in at least one embodiment of the present disclosure, the distal end of the housing body has a first through hole, the cap assembly has a cap body having a second through hole, the distal and proximal ends of the sleeve core are respectively communicated with the first and second through holes, and the sleeve core is rotatable in a circumferential direction. For example, at least one embodiment of the present disclosure provides for a housing assembly wherein at least one of the two sliding sleeves has a first sleeve portion and a second sleeve portion that are connected to each other, the first sleeve portion having an outer diameter that is smaller than an outer diameter of the at least a portion of the second sleeve portion, the first sleeve portion being further from the spring than the second sleeve portion, the second sleeve portion having a cavity that receives an end of the spring. For example, in the housing assembly provided in at least one embodiment of the present disclosure, one of the two sliding sleeves is disposed at a proximal end of the sleeve core and is disposed to include a first receiving hole at the proximal end, and the other of the two sliding sleeves is disposed at a distal end of the sleeve core and is disposed to include a second receiving hole at the distal end. For example, at least one embodiment of the present disclosure provides for a housing assembly wherein at least one end of the sleeve core has a blocking portion configured to axially block the second sleeve portion of the sliding sleeve disposed within the sleeve core to limit movement of the second sleeve portion out of the sleeve core. For example, at least one embodiment of the present disclosure provides for a housing assembly wherein each of the two sliding sleeves and one of the sleeve cores have radial projections and the other of the two sliding sleeves and the sleeve core have grooves, the projections being located within and mating with the grooves such that the sliding sleeve is radially and circumferentially arrested and axially slidable relative to the sleeve core. For example, at least one embodiment of the present disclosure provides for the housing assembly to further include a first gasket a