CN110960296A - Puncture outfit shell and puncture outfit - Google Patents

Abstract

The invention discloses a puncture outfit shell and a puncture outfit, wherein the puncture outfit shell comprises a first shell part, a second shell part and a locking mechanism, and the first shell part and the second shell part are selectively connected by the locking mechanism; the locking mechanism comprises a protrusion and a groove, the protrusion is arranged on the first shell part, and the groove is arranged on the second shell part; the first shell part moves relative to the second shell part, so that the protrusion is clamped or separated from the groove, the first shell part is connected with the second shell part through clamping, and the first shell part is not connected with the second shell part through separation; the motion comprises rotation or linear motion; the bulges and the grooves are V-shaped or inclined. The puncture outfit comprises the puncture outfit shell. The whole parts of the locking mechanism in the shell of the puncture outfit are few, a spring is not needed, the assembly process is simple, a matching piece and the locking piece which form the locking mechanism are easy to clamp, and the defect that the existing rotary locking mechanism is easy to clamp due to the fact that the existing rotary locking mechanism is stirred to operate is overcome.

Description

Puncture outfit shell and puncture outfit

The application is a divisional application of an invention patent application with application date of 29/09/2018, application number of 201811153573.2 and invention name of 'a puncture outfit shell and puncture outfit'.

Technical Field

The invention relates to a surgical instrument, in particular to a puncture outfit shell and a puncture outfit, and belongs to the field of medical equipment.

Background

A puncture instrument is a surgical instrument used to establish access to the abdominal cavity. The penetrator generally includes two parts, a cannula assembly and a piercing mandrel. The general clinical use mode is as follows: a small incision is made in the abdomen of the patient, and the distal end of the piercing mandrel is inserted through the cannula assembly, exposing the distal end of the piercing mandrel from the distal end of the cannula assembly. The doctor holds the near end of the puncture core rod and applies puncture operating force to the puncture device, so that the far end of the puncture core rod is inserted into the abdominal cavity and drives the far end of the sleeve assembly to enter the inside of the abdominal cavity, the puncture core rod is pulled out, and the sleeve assembly forms a passage for the surgical instrument to enter and exit the abdominal cavity.

In operation, it is usually necessary to establish and maintain a stable pneumoperitoneum so as to form a sufficient operation space inside the abdominal cavity, and in order to avoid pneumoperitoneum leakage, a transition cap capable of further sealing is usually connected to the cannula cartridge at the proximal end of the cannula, and is arranged between the cannula cartridge and the puncture core rod holding part. In the disclosed prior art, a first seal is disposed in the cannula cartridge, a second seal is disposed in the conversion cap, the first seal generally provides a sealing function when no puncture core rod or surgical instrument is present in the cannula assembly due to the difference of the two sealing structures, the second seal generally provides a sealing function when the surgical instrument is present in the cannula assembly, the first seal in the cannula cartridge and the second seal in the conversion cap cooperate to ensure pneumoperitoneum stability, and the cannula cartridge and the conversion cap are connected and locked through a locking mechanism. Firstly, when the sleeve bin is connected with the conversion cap, the connection part of the sleeve bin and the conversion cap needs to ensure good sealing performance, meanwhile, a locking mechanism is generally needed in an operation to realize the separation of the sleeve bin and the conversion cap, after the conversion cap is detached, a tissue sample can be more conveniently taken out, and the damage of the tissue sample in the taking-out process is reduced.

The existing rotary locking mechanism is complex in structure, selective connection between the conversion cap and the sleeve bin is usually realized by means of a spring, and the locking mechanism adopts more parts and has high assembly process requirements. Meanwhile, the locking mechanism adopts a mode of stirring the rotating button in the using process to enable all parts to act synergistically, so that the locking mechanism is disassembled and assembled, and all parts forming the locking mechanism are easy to have problems in the process or assembly, so that the parts can be blocked in the cooperation process, the normal work of the locking mechanism is influenced, and the locking mechanism is not beneficial to the quick disassembly and assembly between the conversion cap and the sleeve bin.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a puncture outfit shell, which solves the problems that the locking mechanism in the prior art adopts a plurality of parts, has high assembly process requirement, and is easy to be blocked due to poking operation, thereby influencing the normal work of the locking mechanism.

The invention is realized by the following technical scheme: a puncture instrument housing comprising a first housing member, a second housing member, and a latching mechanism, the first housing member being selectively connectable with the second housing member, the selective connection being effected by the latching mechanism;

the locking mechanism comprises a protrusion and a groove, the protrusion is arranged on the first shell part, and the groove is arranged on the second shell part; the first housing part moves relative to the second housing part, so that the protrusion is clamped with or separated from the groove, the clamping realizes the connection of the first housing part and the second housing part, and the separation realizes the disconnection of the first housing part and the second housing part; the motion comprises a rotational or linear motion; the bulges and the grooves are V-shaped; or the bulges are oblique bulges, and the grooves are oblique grooves.

Preferably, the protrusion is engaged with the recess to limit movement of the first housing member and the second housing member in at least two degrees of freedom relative to each other.

Preferably, the at least two degrees of freedom include an axial direction and a circumferential direction.

Preferably, the latching mechanism comprises a fitting and a locking element; the fitting member includes the projection, the fitting member

A side wall provided to the first housing part; the locking member includes an upper portion and a lower portion, the lower portion being disposed on the locking member

A sidewall of the second housing member, the recess being disposed in the upper portion.

Preferably, the number of the fitting members is two, and the two fitting members are symmetrically arranged with respect to a central axis of the first housing member; the number of the locking pieces is two, and the two locking pieces are symmetrically arranged relative to the central axis of the second housing part.

Preferably, the first housing part is a conversion cap including a sealing cover and a sealing seat, and the sealing cover

The sealing seat is axially connected with the sealing seat; the second housing part is a cannula cartridge or a puncture device core rod.

Preferably, the outer wall of the sealing seat is provided with an anti-slip rib.

A puncture outfit, which comprises the puncture outfit shell; the first shell part is a conversion cap, the conversion cap comprises a sealing cover and a sealing seat, the sealing cover and the sealing seat are axially connected, the sealing cover is annular with an opening in the middle, and the bulge is arranged on the sealing seat; the second shell part is a sleeve bin or a puncture outfit core rod, and the groove is formed in the sleeve bin or the puncture outfit core rod.

A puncture outfit, which comprises the puncture outfit shell; the first shell component is a sleeve bin or a puncture outfit core rod, and the bulge is arranged on the sleeve bin or the puncture outfit core rod; the second shell part is a conversion cap, the conversion cap comprises a sealing cover and a sealing seat, the sealing cover and the sealing seat are axially connected, the sealing cover is annular with a middle opening, and the groove is formed in the sealing seat.

Compared with the prior art, the invention has the beneficial effects that: the shell of the puncture outfit adopts the locking mechanism to realize the selective connection between the two shell components, the whole parts of the locking mechanism are few, a spring is not needed, the assembly process is simple, the matching piece and the locking piece which form the locking mechanism are easy to be clamped, and the defect that the existing rotary locking mechanism is easy to be blocked by stirring operation is overcome.

Drawings

FIG. 1 is a schematic structural view of a puncture instrument housing according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a conversion cap according to an embodiment of the invention;

FIG. 3 is a front view of a transition cap according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a cannula cartridge according to an embodiment of the invention;

fig. 5 is a schematic structural view of the first locking portion of fig. 4;

FIG. 6 is a schematic view of a snap-fit condition of a latching mechanism according to an embodiment of the present invention;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a schematic view of an unlatched condition of a latching mechanism according to an embodiment of the present invention;

fig. 9 is a top view of fig. 8.

Reference numerals

10-conversion cap, 11-sealing cover, 12-sealing seat, 121-anti-slip rib, 20-sleeve bin, 30-locking mechanism, 31-locking piece, 311-first locking part, 311 a-upper part, 311 b-lower part, 312-second locking part, 313-bayonet, 314-positioning groove, 315-clamping groove, 316-inlet, 317-stop surface, 318-clamping groove wall, 319-positioning groove wall, 320-extrusion part, 32-matching piece, 321-first bulge, 322-second bulge, 323-positioning block and 324-clamping block.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1, the present embodiment provides a puncture instrument housing including a latch mechanism 30 and first and second housing parts selectively connected by the latch mechanism 30. The locking mechanism 30 comprises a locking member 31 and a mating member 32, wherein the locking member 31 is provided on the second housing part and the mating member 32 is provided on the first housing part. The term "selectively connected" as used herein means that the first housing part and the second housing part can be connected or disconnected by the locking mechanism 30. When not connected, the first housing member may be freely separable from the second housing member. In this embodiment, "disposed" means that the two parts are integrally formed or connected to each other.

In one embodiment of the present invention, the first housing member is a transition cap 10 and the second housing member is a cannula cartridge 20. Of course, the latching mechanism 30 of the present embodiment is not limited to selectively connecting the conversion cap 10 and the cannula cartridge 20, and the latching mechanism 30 of the present embodiment may be applied to any lancet housing parts that require connection and disconnection.

It should be noted that, in order to describe the structure of the puncture device housing of the present invention more clearly, in the present embodiment, "inner" refers to a direction toward the central axis of the puncture device housing, "outer" refers to a direction away from the central axis of the puncture device housing, "upper" refers to a direction toward the conversion cap 10 along the central axis of the puncture device housing, "lower" refers to a direction toward the cannula cartridge 20 along the central axis of the puncture device housing, "top" refers to a face on the uppermost side of the component, "bottom" refers to a face on the lowermost side of the component, and the definitions of "inner", "outer", "upper", "lower", "top" and "bottom" are applicable to all the components of the puncture device housing of the present embodiment. The axial direction refers to the direction along the central axis of the conversion cap 10 or the sleeve bin 20, and after the conversion cap 10 is connected with the sleeve bin 20, the central axes of the two are coaxial. Circumferential refers to the circumferential direction along the housing of the conversion cap 10 or along the housing of the cannula cartridge 20, i.e. the direction of rotation of the housing of the conversion cap 10 or along the housing of the cannula cartridge 20.

Referring to fig. 2 and 3, the conversion cap 10 includes a sealing cover 11 and a sealing seat 12, the sealing cover 11 is connected with the sealing seat 12 along the axial direction, and the structures of the sealing cover 11 and the sealing seat 12 and the connection mode between the sealing cover 11 and the sealing seat 12 are all the prior art, so that the detailed description is omitted. The sealing cover 11 is annular, the sealing cover 11 covers the sealing seat 12 to form the conversion cap 10 together, and a second seal is arranged in the conversion cap 10 to seal the annular opening of the sealing cover 11. The housing of the seal holder 12 is substantially cylindrical and the fitting 32 is arranged on the housing of the seal holder 12. The outer wall of the sealing seat 12 is provided with a plurality of anti-slip ribs 121, which facilitate the operator to hold and rotate the conversion cap 10. Specifically, each anti-slip rib 121 extends axially, and a plurality of anti-slip ribs 121 are arranged on the outer wall of the seal seat 12 at uniform intervals.

Referring to fig. 3, the fitting 32 includes a first protrusion 321 and a second protrusion 322 disposed on the outer wall of the seal holder 12, and the first protrusion 321 and the second protrusion 322 are disposed along the radial direction of the seal holder 12 and are symmetrical with respect to the central axis of the seal holder 12. The first projection 321 and the second projection 322 are connected to each other or integrally formed with the seal holder 12. With continued reference to fig. 2 and 3, the first protrusion 321 and the second protrusion 322 have the same structure, and the first protrusion 321 is taken as an example to illustrate the specific structure thereof. The first protrusion 321 includes a locking block 324 and a positioning block 323, the positioning block 323 is located above the locking block 324, and the positioning block 323 is attached to the locking block 324. The bottom surfaces of the engaging blocks 324 of the first protrusion 321 and the second protrusion 322 are all located on the same horizontal plane as the bottom surface of the shell of the conversion cap 10, i.e. the bottom surface of the shell of the seal receptacle 12, so as to facilitate the mutual positioning with the locking member 31 on the cannula housing 20.

Referring to fig. 4, the housing of the cannula cartridge 20 is generally a hollow cylinder, the first channel of the puncture device is sealingly arranged in the inner cavity of the cannula cartridge 20, and the locking member 31 is arranged on the housing of the cannula cartridge 20. Specifically, the locking member 31 includes a first locking portion 311 and a second locking portion 312, and the first locking portion 311 and the second locking portion 312 are symmetrically disposed in the radial direction of the cartridge case 20. The first locking portion 311 and the second locking portion 312 are connected to or integrally formed with the cannula cartridge 20. The first locking portion 311 and the second locking portion 312 have the same structure, and therefore, the specific structure of the first locking portion 311 will be described as an example. The first locking portion 311 includes an upper portion 311a and a lower portion 311b, the lower portion 311b is disposed on the outer wall of the housing of the magazine 20, the first locking portion 311 extends in the axial direction of the magazine 20, and the upper portion 311a protrudes from the top surface of the magazine 20. A bayonet 313 is provided in an upper portion 311a of the first locking portion 311, and the bayonet 313 faces a direction of a central axis of the cartridge 20. Referring to fig. 5, the bayonet includes a first limiting portion for defining an axial position of the first protrusion, and a second limiting portion for defining a circumferential and radial position of the first protrusion. Specifically, the first position-limiting portion is a locking groove 315, and the second position-limiting portion is a positioning groove 314. Corresponding to the structure of the first protrusion 321, the engaging slot 315 and the positioning slot 314 are axially disposed on the first locking portion 311, and the positioning slot 314 is located at the top of the engaging slot 315. Wherein the snap groove 315 extends in the circumferential direction for accommodating the snap block 324 to define the axial position of the snap block 324. The engaging groove 315 has a front end and a rear end in the opposite direction to the rotation direction of the conversion cap 10. The front end is opened to form an entrance 316 of the engaging groove 315, and a chamfer is formed at the entrance 316 to facilitate the engaging block 324 to enter the engaging groove 315 and enter the engaging groove 315 along the extending direction of the engaging groove 315. The rear end is provided with a stop face 317 for the positioning of the catch block 324 in the catch groove 315. Further, the engaging slot 315 includes two engaging slot walls 318, the upper engaging slot wall 318 is a top surface of the engaging slot 315, the lower engaging slot wall 318 is a bottom surface of the engaging slot 315, the upper engaging slot wall 318 is parallel to the lower engaging slot wall 318, and the lower engaging slot wall 318 and the top surface of the cannula housing 20 are located on the same horizontal plane, after the engaging block 324 enters the engaging slot 315, the top surface and the bottom surface of the engaging block 324 abut against the two engaging slot walls 318 respectively, so as to prevent the engaging element 32 from moving up and down relative to the locking element 31, thereby achieving the axial positioning of the locking element 31. The positioning slot 314 extends in an axial direction for receiving the positioning block 323 to define a circumferential and radial position of the positioning block 323, the circumferential direction being a direction along which the conversion cap 10 rotates. The positioning slot 314 has a positioning slot wall 319, and after the positioning block 323 is inserted into the positioning slot 314, the side surface of the positioning block 323 abuts against the positioning slot wall 319 to prevent the engaging element 32 from moving circumferentially and radially relative to the locking element 31. The side surface of the positioning block 323 refers to a surface thereof extending in parallel with the axial direction, and the positioning groove wall 319 refers to a surface of the positioning groove 314 extending in parallel with the axial direction and in the axial direction.

During the process of assembling and disassembling the conversion cap 10 and the cannula cartridge 20, the fitting member 32 has a first position and a second position, the rotation of the conversion cap 10 can drive the fitting member 32 to convert between the first position and the second position, when the fitting member 32 is at the first position, the fitting member 32 is engaged with the locking member 31, when the fitting member 32 is at the second position, the fitting member 32 is not engaged with the locking member 31, that is, for the fitting member 32, all positions where the fitting member 32 is not engaged with the locking member 31 are the second positions.

When the conversion cap 10 and the sleeve bin 20 are assembled, the conversion cap 10 and the sleeve bin 20 are aligned in the axial direction, and the bottom surface of the conversion cap 10 is attached to the top surface of the sleeve bin 20, as shown in fig. 8 and 9, at this time, the fitting member 32 is located at the second position, and the first protrusion 321 and the first locking portion 311, and the second protrusion 322 and the second locking portion 312 are separated from each other. When the conversion cap 10 is rotated in the first direction, the conversion cap 10 drives the first protrusion 321 to move toward the first locking portion 311 along the circumferential direction, and simultaneously drives the second protrusion 322 to move toward the second locking portion 312 along the circumferential direction. As the conversion cap 10 is rotated, the engaging block 324 of the first protrusion 321 enters the engaging groove 315 of the first locking portion 311 from the entrance 316 of the engaging groove 315 of the first locking portion 311 and moves toward the stop surface 317 of the engaging groove 315, and at the same time, the engaging block 324 of the second protrusion 322 enters the engaging groove 315 of the second locking portion 312 from the entrance 316 of the engaging groove 315 of the second locking portion 312 and moves toward the stop surface 317 of the engaging groove 315. The area formed around upper snap groove wall 318 and locating groove wall 319 further from stop surface 317 is extrusion 320. Under the action of the rotational force, the positioning block 323 of the first protrusion 321 presses the pressing portion 320 of the first lock portion 311 and moves toward the positioning groove 314 of the first lock portion 311 until engaging with the positioning groove 314, and the positioning block 323 of the second protrusion 322 presses the pressing portion 320 of the second lock portion 312 and moves toward the positioning groove 314 of the second lock portion 312 until engaging with the positioning groove 314. When the positioning block 323 of the first protrusion 321 is located in the positioning slot 314 of the first locking portion 311 and the positioning block 323 of the second protrusion 322 is located in the positioning slot 314 of the second locking portion 312, the engaging member 32 is completely engaged with the locking member 31, and the conversion cap 10 and the sleeve barrel 20 are stably connected, as shown in fig. 6 and 7. At this time, the end surface of one end of the engagement block 324 in the rotation direction front side abuts against the stopper surface 317 of the engagement groove 315. The two engaging blocks 324 are respectively inserted into the two engaging grooves 315 to prevent the conversion cap 10 from moving axially relative to the casing storage 20, and the two positioning blocks 323 are respectively inserted into the two positioning grooves 314 to prevent the conversion cap 10 from moving circumferentially and radially relative to the casing storage 20.

It should be noted that, in order to facilitate the pressing operation of the positioning block 323 on the first locking portion 311 and the second locking portion 312, the length of each positioning block 323 in the radial direction cannot be too large, and the positioning block 323 is preferably a block body whose hemispherical shape or outer wall is arc-shaped, and the shape of the positioning groove 314 is adapted thereto.

In addition, in order to further enhance the stable connection between the conversion cap 10 and the cannula housing 20 and easily determine the relative position of the stable connection between the conversion cap 10 and the cannula housing 20, the two engaging blocks 324 are arc-shaped along the direction of the outer periphery of the sealing seat 12, the length of the arc is the same as that of the two engaging grooves 315, and correspondingly, the engaging grooves 315 are also arc-shaped, that is, when the conversion cap 10 and the cannula housing 20 are stably connected, one ends of the two engaging blocks 324 abut against the stopping surfaces 317 of the two engaging grooves 315, and the other ends of the two engaging blocks 324 are flush with the inlets 316 of the two engaging grooves 315. The first locking portion 311 and the second locking portion 312 are arc-shaped.

It should be noted that the first protrusion 321 and the second protrusion 322 may be V-shaped protrusions, and correspondingly, the upper portions 311a and 311b of the first locking portion 311 and the second locking portion 312 may be V-shaped grooves, and the V-shaped protrusions engage with or disengage from the V-shaped grooves, so as to connect or disconnect the conversion cap 10 and the cannula housing 20 with each other. The first protrusion 321 and the second protrusion 322 may also be oblique protrusions, and accordingly, the upper portions 311a and 311b of the first locking portion 311 and the second locking portion 312 may be oblique grooves, and the oblique protrusions engage with or disengage from the oblique grooves, so that the conversion cap 10 and the cannula housing 20 are connected or disconnected with each other. The oblique direction means that an included angle is formed between the central axis of the conversion cap 10 or the central axis of the sleeve bin 20, and the included angle is larger than 0 degree and smaller than 90 degrees. The V-shaped protrusion and the V-shaped groove, or the oblique protrusion and the oblique groove, can be engaged or disengaged by relative rotation between the conversion cap 10 and the cannula housing 20, and can also be engaged or disengaged by linear movement between the conversion cap 10 and the cannula housing 20, the linear movement including pressing the conversion cap 10 away from the cannula housing 20. Moreover, the V-shaped protrusion and the V-shaped groove, or the oblique protrusion and the oblique groove, can limit the axial and circumferential movement between the conversion cap 10 and the casing silo 20, and prevent the conversion cap 10 from separating from the casing silo 20.

When the tissue sample needing to be taken out is large, the shell of the puncture outfit assembled in the embodiment is disassembled, so that the tissue sample can be taken out conveniently, and the damage of the tissue sample in the taking-out process is reduced.

When the housing of the puncture device assembled in this embodiment is disassembled, the switching cap 10 is rotated along the second direction, the switching cap 10 drives the first protrusion 321 and the second protrusion 322 to move, so that the engaging block 324 of the first protrusion 321 and the second protrusion 322 moves out of the engaging groove 315, and meanwhile, the two positioning blocks 323 of the first protrusion 321 and the second protrusion 322 press the first locking portion 311 and the second locking portion 312 to move out of the positioning groove 314 under the action of the rotational force. The switching cap 10 is further rotated to move the engaging element 32 from the first position to the second position, after the two engaging blocks 324 are completely removed from the two engaging slots 315, the first protrusion 321 is completely separated from the first locking portion 311, and the second protrusion 322 is completely separated from the second locking portion 312, and the engaging element 32 is located at the second position, referring to fig. 8 and 9, the switching cap 10 can be removed from the cannula cartridge 20, thereby achieving the detachment of the switching cap 10 and the cannula cartridge 20. The second direction is opposite to the first direction, and in the embodiment of the present invention, preferably, the first direction is a clockwise direction, and the second direction is a counterclockwise direction.

Of course, when the mating member 32 is located at the second position, the conversion cap 10 may also be rotated in the counterclockwise direction, and at this time, the engaging groove 315 has a front end and a rear end in the direction opposite to the counterclockwise direction of the conversion cap 10, the front end is provided with the entrance 316 of the engaging groove 315, the rear end is provided with the stopping surface 317, and the positions of the entrance 316 and the stopping surface 317 of the engaging groove 315 are opposite to those in the above-mentioned embodiment, so that the first protrusion 321 is engaged with the second locking portion 312, and the second protrusion 322 is engaged with the first locking portion 311.

In another embodiment of the present invention, the locking mechanism 30 described above may also be used to selectively couple the conversion cap 10 to the plunger rod of the penetrator.

The invention also provides a puncture outfit, which comprises the puncture outfit shell.

The locking mechanism 30 is adopted to selectively connect the two puncture outfit shell parts, the locking mechanism 30 has few parts, no spring is needed, the assembly process is simple, the matching piece 32 and the locking piece 31 which form the locking mechanism 30 are easy to disassemble, and the defect that the existing rotary locking mechanism 30 is easy to block due to the adoption of toggle operation is avoided.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although the embodiment of the present invention has been shown and described, it is understood that the above embodiment is illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiment without departing from the scope of the present invention, and all such changes, modifications, substitutions and alterations are intended to be within the scope of the present invention.

Claims (9)

1. A puncture instrument housing comprising a first housing member, a second housing member, and a latching mechanism, the first housing member being selectively connectable with the second housing member, the selective connection being effected by the latching mechanism;

the locking mechanism is characterized in that the locking mechanism comprises a protrusion and a groove, the protrusion is arranged on the first shell part, and the groove is arranged on the second shell part; the first housing part moves relative to the second housing part, so that the protrusion is clamped with or separated from the groove, the clamping realizes the connection of the first housing part and the second housing part, and the separation realizes the disconnection of the first housing part and the second housing part; the motion comprises a rotational or linear motion; the protrusion and the groove are both V-shaped, or the protrusion is an oblique protrusion and the groove is an oblique groove.

2. The puncture instrument housing of claim 1, wherein the protrusion engages the recess to limit movement of the first housing member and the second housing member with respect to each other in at least two degrees of freedom.

3. The puncture instrument housing of claim 2, wherein the at least two degrees of freedom include axial and circumferential.

4. The puncture instrument housing according to any one of claims 1 to 3, wherein the locking mechanism comprises a fitting member and a locking member; the fitting comprises the protrusion, and the fitting is arranged on the side wall of the first shell part; the locking member includes an upper portion and a lower portion, the lower portion being disposed at a sidewall of the second housing part, and the groove being disposed at the upper portion.

5. The puncture instrument housing of claim 4, wherein there are two of the mating members, the two mating members being symmetrically disposed with respect to a central axis of the first housing member; the number of the locking pieces is two, and the two locking pieces are symmetrically arranged relative to the central axis of the second housing part.

6. The puncture outfit housing according to claim 1, wherein the first housing member is a conversion cap comprising a sealing cover and a sealing seat, the sealing cover is axially connected with the sealing seat, and the protrusion is disposed on the sealing seat; the second shell part is a sleeve bin or a puncture outfit core rod, and the groove is formed in the sleeve bin or the puncture outfit core rod.

7. The puncture instrument housing according to claim 6, wherein the outer wall of the sealing seat is provided with a non-slip rib.

8. A puncture instrument, characterized in that it comprises a puncture instrument housing according to any one of claims 1 to 7; the first shell part is a conversion cap, the conversion cap comprises a sealing cover and a sealing seat, the sealing cover and the sealing seat are axially connected, the sealing cover is annular with an opening in the middle, and the bulge is arranged on the sealing seat; the second shell part is a sleeve bin or a puncture outfit core rod, and the groove is formed in the sleeve bin or the puncture outfit core rod.

9. A puncture instrument, characterized in that it comprises a puncture instrument housing according to any one of claims 1 to 5; the first shell component is a sleeve bin or a puncture outfit core rod, and the bulge is arranged on the sleeve bin or the puncture outfit core rod; the second shell part is a conversion cap, the conversion cap comprises a sealing cover and a sealing seat, the sealing cover and the sealing seat are axially connected, the sealing cover is annular with a middle opening, and the groove is formed in the sealing seat.

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