CN216060675U

CN216060675U - Detachable sleeve assembly and puncture outfit

Info

Publication number: CN216060675U
Application number: CN202120415540.1U
Authority: CN
Inventors: 樊友平; 倪前龙; 杨海龙; 魏义; 陈伟理
Original assignee: Shanghai Zhiyu Medical Instrument Co ltd
Current assignee: Shanghai Zhiyu Medical Instrument Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2022-03-18
Anticipated expiration: 2031-02-25

Abstract

The utility model relates to a detachable sleeve assembly, which comprises a sleeve (110) and an outer cover (120), wherein the sleeve is provided with a first connecting part which is in threaded connection with a second connecting part on the outer cover; the lower part of the first connecting part is provided with a first positioning part which is matched with a second positioning part arranged at the lower part of the second connecting part of the outer cover; the housing has elasticity, and the first positioning part and the second positioning part in connection can be separated by pressing the lower part of the housing. The utility model also provides a puncture instrument with the detachable sleeve assembly. The sleeve can be separated from the outer cover, and the fetching channel is enlarged, so that a doctor can fetch a larger-volume pathological tissue from the inside of the body of an operated object, and the operation speed is accelerated; the sleeve and the outer cover structure are provided with a device for preventing convolution, so that the risk of dislocation and disconnection of the sleeve and the outer cover in the operation process is avoided, and the operation process is safer and more effective.

Description

Detachable sleeve assembly and puncture outfit

Technical Field

The utility model belongs to the field of minimally invasive surgical instruments, and particularly relates to a detachable cannula assembly and a puncture outfit.

Background

The disposable puncture outfit product is mainly applied to minimally invasive surgery and mainly comprises two major components, namely a cannula component and an obturator component. In current puncture ware use, sleeve pipe and dustcoat fixed connection in the thimble assembly are in the same place for when taking out pathological change tissue in the operation process, just can take out pathological change tissue after the sealing member in the dustcoat, and the passageway aperture of sealing member is little, and it is extremely inconvenient to get the thing, can cause the pollution of sealing member moreover, influences follow-up operation.

The present inventors have made extensive studies and practice to provide the present invention.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above problems in the prior art, the present invention provides a detachable cannula assembly and a puncture device, wherein the cannula and the housing of the cannula assembly are detachably connected, and the housing can be detached from the cannula during the operation without passing through the sealing member inside the housing; in addition, the detachable sleeve assembly can realize the sealing between the sleeve and the outer cover only by the sealing between the assembly parts, so that the structure is simple and the assembly is convenient; the assembled sleeve and the outer cover are tightly combined, so that dislocation and disconnection are not easy to occur, and the reliability is high.

The technical scheme of the detachable sleeve assembly of the utility model is as follows: a detachable sleeve assembly comprises a sleeve and an outer cover, wherein a first connecting part is arranged on the sleeve and is in threaded connection with a second connecting part on the outer cover; the lower part of the first connecting part is provided with a first positioning part which is matched with a second positioning part arranged at the lower part of the second connecting part of the outer cover; the housing has elasticity, and the first positioning part and the second positioning part in connection can be separated by pressing the lower part of the housing.

Further, the first connecting portion comprises a cylindrical portion and a conical cylindrical portion which are connected with each other, an annular sleeve top surface is arranged at the top of the cylindrical portion, sleeve threads are arranged on the periphery of the cylindrical portion, and the sleeve top surface and the sleeve threads are respectively used for being in threaded engagement with an outer cover positioning ring and an outer cover on the lower portion of the outer cover to form double sealing.

Further, the inner side surface of the upper portion of the cylindrical portion has a sleeve sealing surface of a conical surface which is fitted to a cover sealing surface provided on the inner wall surface of the lower portion of the cover.

Optionally, a sealing ring is provided on the outer shield positioning ring to form an enhanced double seal.

Further, the first positioning part comprises a circular plate and a limiting block arranged on the circular plate, and the limiting block comprises a first limiting surface and a first sliding surface adjacent to the first limiting surface; the second positioning part comprises a stop block, a second limiting surface and a second sliding surface adjacent to the second limiting surface are arranged on the stop block, and the radius of gyration of the second sliding surface is smaller than that of the first sliding surface.

Furthermore, two limit blocks are arranged and symmetrically arranged on the circular plate; two corresponding stop blocks are arranged at the lower part of the outer cover; two pressing blocks suitable for being pressed by fingers are arranged in the middle of the two stop blocks at the lower part of the outer cover.

Optionally, the first positioning portion includes a circular plate and a stopper disposed on the circular plate, and the stopper includes a first stopper surface and a third sliding surface adjacent to the first stopper surface; the second positioning part comprises a pressing stop block, a third limiting surface and a fourth sliding surface adjacent to the third limiting surface are arranged on the pressing stop block, and the radius of gyration of the fourth sliding surface is larger than that of the third sliding surface.

Optionally, the first positioning portion includes a positioning groove/detent block disposed on the cylindrical portion or the conical cylindrical portion, and the second positioning portion includes a detent block/detent groove disposed on a lower portion of the outer cover, and the detent block is capable of engaging with the detent groove.

The utility model also provides a puncture outfit with a detachable sleeve assembly, which comprises a blocking rod and a sleeve assembly, wherein the sleeve assembly is the detachable sleeve assembly.

The utility model has the advantages.

1. The sleeve can be separated from the outer cover, and the fetching channel is enlarged, so that a doctor can fetch the lesion tissue with larger volume from the inside of the body of the operated object, and the operation speed is accelerated.

2. The sleeve and the outer cover structure are provided with a device for preventing convolution, so that the risk of dislocation and disconnection of the sleeve and the outer cover in the operation process is avoided, and the operation process is safer and more effective.

3. The sleeve and the outer cover are sealed by the structure, the structure is simple, and materials are saved.

4. The puncture outfits with different models can be obtained only by replacing the sleeves with different dimensions, so that the production and manufacturing cost can be greatly saved while different market demands are met.

Drawings

FIG. 1 is an exploded view of one embodiment of the removable sleeve assembly of the present invention.

FIG. 2 is a partial cross-sectional schematic view of one embodiment of the removable sleeve assembly of the present invention.

Fig. 3 is a schematic view of the sleeve construction of the removable sleeve assembly of fig. 1.

Fig. 4 is a schematic view of the housing of the removable sleeve assembly of fig. 1.

Fig. 5 is an assembled view of the removable sleeve assembly of fig. 3 and 4.

Fig. 6 is an exploded view of another embodiment of the removable sleeve assembly of the present invention.

FIG. 7 is a schematic structural view of another embodiment of the removable sleeve assembly of the present invention.

Fig. 8 is an exploded view of the structure shown in fig. 7.

FIG. 9 is a schematic structural view of another embodiment of the removable sleeve assembly of the present invention.

Fig. 10 is an exploded view of the structure shown in fig. 9.

FIG. 11 is an exploded view of one embodiment of the spike of the present invention having a removable cannula assembly.

Wherein 100-sleeve component, 110-sleeve, 111-sleeve thread, 112-circular plate, 113-stop block, 113 a-first stop face, 113 b-first sliding face, 113 c-third sliding face, 114-sleeve top face, 115-sleeve sealing face, 116-clamping block, 120-housing, 121-housing thread, 122-pressing block, 123-stop block, 123 a-second stop face, 123 b-second sliding face, 124-housing positioning ring, 125-housing sealing face, 126-housing sealing support column, 127-pressing stop block, 127 a-third stop face, 127 b-fourth sliding face, 128-positioning groove, 130-sealing ring, 140-plug valve, 150-sealing cover, 160-O-ring, 170-duckbill, 200-blocking rod.

Detailed Description

A removable cannula assembly and a puncture instrument having the same according to the present invention will be further described with reference to FIGS. 1-11. It should be noted that the following examples are only for explaining the technical solution of the present invention and are not to be construed as limiting the present invention.

As shown in fig. 1 to 5, a detachable sleeve assembly 100 of the present invention comprises a sleeve 110 and a housing 120, wherein the upper portion of the sleeve 110 is provided with a first connecting portion which is matched with a second connecting portion of the lower portion of the housing 120; the lower part of the first connecting part is provided with a first positioning part which is matched with a second positioning part arranged at the lower part of the second connecting part of the outer cover 120; the lower portion of the housing 120 has elasticity, and the first positioning portion and the second positioning portion in the connection can be disengaged by pressing the lower portion of the housing 120. Only after the first positioning portion and the second positioning portion are separated, the connection between the first connection portion and the second connection portion can be released, and the separation between the sleeve 110 and the housing 120 is achieved.

As shown in fig. 1 to 3, the first connection portion includes a cylindrical portion and a conical cylindrical portion connected to each other, an annular sleeve top surface 114 is provided on the top of the cylindrical portion, a sleeve thread 111 is provided on the outer circumference of the cylindrical portion, and the sleeve top surface 114 and the sleeve thread 111 are respectively used for engaging with an outer cover positioning ring 124 and an outer cover thread 121 on the lower portion of an outer cover 120 to form a double seal.

The tapered cylinder part is connected with the lower part of the sleeve and plays a role of transitionally connecting the lower part of the sleeve with the cylinder part. The cone part can be connected with various cannulas with different radiuses, and in actual production, different types of puncture outfits can be obtained only by replacing cannulas with different sizes, so that the superior economy of the puncture outfit is embodied.

The cylindrical portion is disposed over the conical portion and is shaped and configured to facilitate connection and sealing between the cannula 110 and the housing 120. The top of the cylindrical portion is an annular sleeve top surface 114 for mating with an outer cover positioning ring 124 disposed on the lower inner wall of the outer cover 120; the upper inner side surface of the cylindrical part is a sleeve sealing surface 115 with a conical surface and is used for matching with an outer cover sealing surface 125 arranged on the lower inner wall of the outer cover 120; the annular sleeve top surface 114 is adjacent the sleeve sealing surface 115; a sleeve thread 111 is provided on the outer surface of the cylindrical portion for engagement with a cover thread 121 provided on the inner wall surface of the lower portion of the cover 120.

Correspondingly, the lower inner wall of the housing 120 is provided with a shape and structure corresponding to the first connection portion of the casing 110, as shown in fig. 2, the lower inner wall of the housing 120 is provided with a housing thread 121 and a sealing ring from bottom to top, the sealing ring is provided with a housing positioning ring 124, the sealing ring extends downwards to form a conical housing sealing surface 125, the housing thread 121 is used for matching with the casing thread 111, the housing positioning ring 124 is used for matching with the casing top surface 114, and the housing sealing surface 125 is used for matching with the casing sealing surface 115, which form a triple seal to avoid air leakage during the operation of the puncture outfit. To enhance the stability of these several seals, hollow housing seal support posts 126 also extend upwardly from the seal ring of the housing 120.

The first positioning portion includes a circular plate 112 and a stopper 113 provided on the circular plate 112, and the stopper 113 includes a first stopper surface 113a and a first sliding surface 113b adjacent thereto (see fig. 3, which is a surface of the stopper 113 having the largest radius of gyration); the second positioning portion includes a stopper 123, the stopper 123 includes a second limiting surface 123a and a second sliding surface 123b (see fig. 4) adjacent to the second limiting surface 123a, and the turning radius of the second sliding surface 123b is smaller than the turning radius of the first sliding surface 113b, so that under the condition of normal fit, that is, under the condition that the first limiting surface 113a and the second limiting surface 123a are close to each other, the second sliding surface 123b cannot cross the first sliding surface 113b, thereby realizing the fastening and locking between the sleeve 110 and the housing 120.

During the assembly process of the sleeve assembly, the sleeve 110 and the housing 120 rotate relatively, and due to the elasticity of the lower portion of the housing 120, when the second sliding surface 123b initially contacts the first sliding surface 113b, an elastic force is generated between the second sliding surface 123b and the first sliding surface 113b, the lower portion of the housing 120 is deformed under a stress, and the radius of gyration of the second sliding surface 123b is enlarged to be the same as that of the first sliding surface 113 b; the sleeve 110 and the housing 120 continue to rotate relatively until the second sliding surface 123b completely slides over the first sliding surface 113b, at which time the elastic force between the two disappears, the lower portion of the housing 120 recovers to its original shape, the turning radius of the second sliding surface 123b is smaller than that of the first sliding surface 113b, the first limiting surface 113a and the second limiting surface 123a contact each other, and the first limiting surface 113a and the second limiting surface 123a limit the reverse relative rotation of the sleeve 110 and the housing 120, thereby realizing the relative positioning of the two.

If it is desired that the sleeve 110 and the housing 120 rotate in opposite directions, the first stopper surface 113a and the second stopper surface 123a are disengaged. The lower part of the outer cover 120 can be pinched by fingers, the lower part of the outer cover 120 deforms, the first limiting surface 32a and the second limiting surface 22a are separated, the turning radius of the second sliding surface 123b is larger than that of the first sliding surface 113b, and the sleeve 110 and the outer cover 120 can be separated by relatively rotating the sleeve 110 and the outer cover 120.

In one embodiment, two stoppers 113 are symmetrically disposed on the circular plate 112; two stoppers 123 corresponding to the lower part of the housing 120 are provided; two pressing blocks 122 suitable for being pressed by fingers are arranged at the middle position of two stoppers 123 at the lower part of the outer cover 120. The user can press the two pressing blocks 122 respectively by the thumb and other fingers of one hand to separate the first limiting surface 113a and the second limiting surface 123a, and then relatively rotate the sleeve 110 and the outer cover 120, so that the threaded connection between the sleeve 110 and the outer cover 120 is loosened, and the separation of the sleeve 110 and the outer cover 120 is realized.

In a preferred embodiment, as shown in fig. 6, a sealing ring is also provided between the sleeve top surface 114 of the sleeve 110 and the outer cover retaining ring 124 of the outer cover 120, so that an enhanced sealing effect can be obtained.

In an alternative embodiment, the first positioning portion includes a positioning groove/detent provided on the cylindrical portion or the conical cylindrical portion, and the second positioning portion includes a detent/detent provided on a lower portion of the housing, the detent being capable of engaging with the detent. As shown in fig. 7 and 8, a protruding latch 116 is provided on the cylindrical portion and the tapered cylindrical portion of the sleeve 110, and a recessed positioning groove 128 for shape-fitting with the latch 116 is provided at the lower portion of the housing 120. Similarly, the detents can also be provided on the housing 120 and the detents can be provided on the cylindrical or tapered portion of the sleeve 110, respectively.

As shown in fig. 9 and 10, in a preferred embodiment, the first positioning portion includes a circular plate 112 and a stopper 113 disposed on the circular plate 112, the stopper including a first stopper surface 113a and a third sliding surface 113c (which is a surface of the stopper 113 having the smallest radius of gyration) adjacent thereto; the second positioning portion includes a pressing stopper 127, the pressing stopper 127 has a third stopper surface 127a and a fourth sliding surface 127b adjacent to the third stopper surface 127a, and the radius of gyration of the fourth sliding surface 127b is larger than that of the third sliding surface 113 c. The user can press the pressing stopper 127 by the thumb and other fingers of one hand, respectively, so that the lower portion of the housing 120 near the pressing stopper 127 is deformed, the radius of gyration of the outer surface of the pressing stopper 127, i.e., the fourth sliding surface 127b, becomes smaller than the radius of gyration of the inner surface of the stopper, i.e., the third sliding surface 113c, and then the sleeve 110 and the housing 120 are relatively rotated, so that the threaded connection between the sleeve 110 and the housing 120 is released, thereby achieving the separation of the sleeve 110 and the housing 120.

As shown in FIG. 11, a puncture instrument with a detachable cannula assembly of the present invention comprises a blocking rod 200 and a cannula assembly 100; wherein the cannula assembly 100 comprises a cannula 110, a housing 120, a stopcock 140, a seal cap 150, an O-ring 160 and a duckbill 170, the combination of the housing 120 and the stopcock 140, the seal cap 150, the O-ring 160 and the duckbill 170 is the same as that of the prior art and will not be described herein.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims

1. A detachable sleeve assembly comprises a sleeve (110) and an outer cover (120), and is characterized in that a first connecting part is arranged on the sleeve (110) and is in threaded connection with a second connecting part on the outer cover (120); the lower part of the first connecting part is provided with a first positioning part which is matched with a second positioning part arranged at the lower part of the second connecting part of the outer cover (120); the housing (120) has elasticity, and the first positioning portion and the second positioning portion in connection can be separated by pressing the lower portion of the housing (120).

2. A removable block of bushings according to claim 1, c h a r a c t e r i z e d in that the first connection portion comprises a cylindrical portion and a conical cylindrical portion connected to each other, the top of the cylindrical portion being provided with an annular bushing top surface (114), the outer circumference of the cylindrical portion being provided with bushing threads (111), the bushing top surface (114) and the bushing threads (111) being adapted to engage with a housing positioning ring (124) and housing threads (121) at the lower part of the housing (120), respectively, to form a double seal.

3. A removable block of bushings according to claim 2, characterized in that the inner side of the upper part of the cylindrical part has a conically shaped bushing sealing surface (115) which mates with a housing sealing surface (125) provided on the inner wall of the lower part of the housing (120).

4. A removable block of bushings according to claim 2, characterized in that a sealing ring (130) is provided on the housing positioning ring (124) to form an enhanced double seal.

5. A removable block of bushings according to claim 1, characterized in that the first retainer comprises a circular plate (112) and a stop (113) arranged on the circular plate (112), the stop (113) comprising a first stop surface (113a) and a first sliding surface (113b) adjacent thereto; the second positioning part comprises a stopper (123), the stopper (123) is provided with a second limiting surface (123a) and a second sliding surface (123b) adjacent to the second limiting surface, and the turning radius of the second sliding surface (123b) is smaller than that of the first sliding surface (113 b).

6. A removable block of bushings according to claim 5, characterized in that said stop blocks (113) are two and are symmetrically arranged on the circular plate (112); two stop blocks (123) are arranged at the lower part of the corresponding outer cover (120); two pressing blocks (122) suitable for being pressed by fingers are arranged at the middle position of the two stop blocks (123) at the lower part of the outer cover (120).

7. A removable block of bushings according to claim 1, characterized in that the first retainer comprises a circular plate (112) and a stop (113) arranged on the circular plate (112), the stop (113) comprising a first stop surface (113a) and a third sliding surface (113c) adjacent thereto; the second positioning part comprises a pressing stop (127), the pressing stop (127) is provided with a third limiting surface (127a) and a fourth sliding surface (127b) adjacent to the third limiting surface, and the turning radius of the fourth sliding surface (127b) is larger than that of the third sliding surface (113 c).

8. A removable block assembly according to claim 2, wherein the first detent comprises a detent provided on the cylindrical or conical portion and the second detent comprises a detent provided on a lower portion of the housing (120), the detent being engageable with the detent.

9. A puncture instrument having a detachable cannula assembly, comprising a blocking rod (200) and a cannula assembly (100), characterized in that the cannula assembly (100) is the detachable cannula assembly according to any one of claims 1-8.