阅读说明：本技术 一种穿刺器外壳及穿刺器 (Puncture outfit shell and puncture outfit ) 是由 孙宝峰 黄晔 于 2018-07-31 设计创作，主要内容包括：本发明公开了一种穿刺器外壳及穿刺器,所述穿刺器外壳包括第一外壳部件、第二外壳部件、以及选择性连接第一外壳部件与第二外壳部件的闭锁机构；闭锁机构包括锁定件和配合件；锁定件设置于第二外壳部件,配合件设置于第一外壳部件；在弹性件的弹力作用下,锁定件与配合件卡合；锁定件在外力作用下克服弹力产生运动,使得锁定件与配合件脱离；卡合和脱离实现第一外壳部件与第二外壳部件的选择性连接；运动包括平移、弹性形变、和枢转中的一种或两种以上的组合。所述穿刺器包括上述穿刺器外壳。本发明穿刺器外壳通过按压闭锁机构实现两外壳部件之间的选择性连接,避免了旋转式闭锁机构易出现卡死的缺陷。(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 for selectively connecting the first shell part and the second shell part; the locking mechanism comprises a locking piece and a matching piece; the locking piece is arranged on the second housing part, and the matching piece is arranged on the first housing part; under the action of the elastic force of the elastic piece, the locking piece is clamped with the mating piece; the locking piece overcomes the elastic force to generate movement under the action of external force, so that the locking piece is separated from the matching piece; the first shell part and the second shell part are connected in a selective mode through clamping and disengaging; the movement includes one or a combination of two or more of translation, elastic deformation, and pivoting. The puncture outfit comprises the puncture outfit shell. The shell of the puncture outfit realizes the selective connection between the two shell parts by pressing the locking mechanism, thereby avoiding the defect that the rotary locking mechanism is easy to be blocked.)

1. A puncture instrument housing comprising a first housing member, a second housing member, and a latching mechanism that selectively connects the first housing member with the second housing member; it is characterized in that the preparation method is characterized in that,

the locking mechanism comprises a locking piece and a fitting piece; the locking member is arranged on the second housing part, and the matching piece is arranged on the first housing part;

under the action of the elastic force of the elastic piece, the locking piece is clamped with the mating piece; the locking piece overcomes the elastic force to generate movement under the action of external force, so that the locking piece is separated from the matching piece; said engagement and disengagement effecting selective connection of said first housing member with said second housing member; the movement comprises one or more of translation, elastic deformation and pivoting;

the mating member includes a projection provided to the first housing member; the locking piece comprises a limiting part; the limiting part is clamped with the lug under the action of the elastic force, and the movement enables the limiting part to be separated from the lug; the locking piece is clamped with the matching piece through the clamping, and the locking piece is separated from the matching piece through the separation;

the pivoting pivot shaft is arranged on the second shell part, and the elastic part is arranged between the limiting part and the pivot shaft.

2. The puncture instrument housing of claim 1, wherein the locking member comprises a locking ring and a pressing member; the locking ring is translated in a direction perpendicular to the axial direction of the second housing part by the pressing piece.

3. The puncture outfit housing according to claim 2, wherein the locking ring is engaged with the engagement piece by moving to an initial position in a direction perpendicular to the axial direction of the second housing member by the elastic force of the elastic member.

4. The puncture instrument housing of claim 3, wherein the resilient member is a spring, the locking ring has a first stop disposed thereon, the second housing member has a second stop disposed thereon, and the spring is disposed between the first stop and the second stop.

5. The puncture instrument housing according to claim 3, wherein the locking ring includes at least one stopper, and the pressing member is disposed outside the locking ring and adjacent to one of the stoppers;

the mating member is at least one protrusion arranged on the lower end surface of the first housing member, and the protrusion is selectively engaged with or disengaged from the limiting member.

6. The puncture outfit housing according to claim 5, wherein the at least one retaining member comprises two first retaining portions disposed symmetrically in a radial direction of the locking ring;

the at least one lug comprises two first lugs which are symmetrically arranged along the radial direction of the first shell part, and the two first lugs are selectively clamped or separated with the two first limiting parts in a one-to-one correspondence mode.

7. The puncture instrument housing according to claim 6, wherein the at least one retaining member further comprises two second retaining portions disposed symmetrically along another radial direction of the locking ring, the another radial direction being mutually perpendicular to the one radial direction;

the lug comprises two second lugs which are symmetrically arranged along the other radial direction of the first shell part, and the two second lugs are respectively and selectively clamped or separated from the two second limiting parts in a one-to-one correspondence mode.

8. The puncture instrument housing of claim 1, wherein the locking member comprises a locking ring and a pressing member; the locking ring is elastically deformed in a direction perpendicular to the axial direction of the second housing part by the pressing piece to disengage the locking ring from the mating piece.

9. The puncture outfit housing according to claim 8, wherein the locking ring comprises at least one stopper, the at least one stopper is a recess formed at the bottom of the locking ring and recessed from bottom to top; the pressing piece is arranged on the outer side of the locking ring at the position of one limiting piece; the engaging piece is at least one protruding block arranged on the lower end face of the first housing part, and the at least one protruding block is selectively clamped or separated with the at least one limiting piece.

10. The puncture outfit housing according to claim 9, wherein the retaining member comprises two first retaining portions disposed symmetrically in one radial direction of the locking ring and two second retaining portions disposed symmetrically in another radial direction of the locking ring, the one radial direction and the another radial direction being perpendicular to each other; the number of the pressing pieces is two, and the pressing pieces are arranged in one-to-one correspondence with the first limiting parts.

11. The puncture instrument housing of claim 9, wherein the protrusions include two first protrusions that are symmetrical along a radial direction of the first housing member and two second protrusions that are symmetrical along another radial direction of the first housing member, the radial direction and the another radial direction being perpendicular to each other; the bayonet of the first bump faces the direction of the central axis of the first shell part, and the bayonet of the second bump faces the direction far away from the central axis of the first shell part.

12. The puncture outfit housing according to claim 11, wherein the retaining member comprises two first retaining portions disposed symmetrically in one radial direction of the locking ring and two second retaining portions disposed symmetrically in another radial direction of the locking ring, the one radial direction and the another radial direction being perpendicular to each other; the number of the pressing pieces is two, and the pressing pieces and the first limiting parts are arranged in a one-to-one correspondence manner; the first lug is clamped with or separated from the first limiting part, and the second lug is clamped with or separated from the second limiting part.

13. The puncture outfit housing according to claim 10, wherein two side walls of each pressing piece are disposed on the outer circumferential surface of the locking ring at the position of the corresponding first position-limiting portion, and a through hole is formed between the two side walls of the pressing piece and the corresponding first position-limiting portion.

14. The puncture outfit housing according to claim 10, wherein a shift block is provided on the outer circumferential surface of the lock ring above each second stopper portion; the second housing part is provided with two displacement grooves, the extension direction of each displacement groove is parallel to the other radial direction, and each displacement block is at least partially positioned in the corresponding displacement groove.

15. The puncture instrument housing of claim 1, wherein the locking member comprises the pivot shaft and a radial arm, the radial arm being pivotable about the pivot shaft, the resilient member being disposed between the radial arm and the pivot shaft.

16. The puncture instrument housing according to claim 1, wherein the elastic member is a spring or a part of the locking member, and the part of the locking member has elasticity and is elastically deformable; the spring comprises a pressure spring and a torsion spring.

17. The puncture instrument housing of claim 15, wherein the lock comprises a first lock and a second lock, each of the first lock and the second lock comprising the pivot shaft and the radial arm.

18. The puncture instrument housing of claim 17, wherein the first latch member and the second latch member are identical in construction, and the first latch member and the second latch member are symmetrically disposed relative to a central axis of the second housing member.

19. The puncture instrument housing according to claim 15, wherein one end of the radial arm is provided with a first stopper portion, the other end of the radial arm is provided with a second stopper portion, and the first stopper portion and the second stopper portion engage with or disengage from the protrusion.

20. The puncture instrument housing according to claim 15, wherein one end of the radial arm is provided with a pressing member, the pressing member includes a pressing portion, and the pressing portion includes the first stopper portion and a through hole.

21. The puncture instrument housing of claim 15, wherein the radial arm comprises a first radial arm and a second radial arm, the pivot axis being disposed between the first radial arm and the second radial arm; an arc or a bevel is formed between the first radial arm and the second radial arm.

22. The puncture instrument housing of claim 15, wherein the tab comprises a first tab and a second tab, the first tab having a bayonet orientation opposite the second tab; the first lug is clamped with or separated from one end of the spiral arm, and the second lug is clamped with or separated from the other end of the spiral arm.

23. The puncture device housing according to any one of claims 1 to 22, wherein the first housing member is a conversion cap comprising a seal cap and a seal seat, the seal cap and the seal seat being axially connected; the lug is arranged on the lower end face of the sealing seat.

24. The puncture outfit shell according to any one of claims 1 to 22, wherein the second shell member is a cannula cartridge, the cannula cartridge comprises a cannula cover and a cannula holder, the cannula cover and the cannula holder are axially connected, and a limiting hole for the mating member to pass through is formed on an end surface of the cannula cover; the locking piece is located between the cannula cover and the cannula holder.

25. A puncture device, comprising the puncture device housing according to any one of claims 1 to 24.

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, and a second seal is disposed in the conversion cap, wherein 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 between the two sealing structures, the second seal generally provides a sealing function when a surgical instrument is present in the cannula assembly, the cannula cartridge and the conversion cap cooperate to ensure pneumoperitoneum stability, and the cannula cartridge and the conversion cap are connected and locked by 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 usually needs to realize the selective connection between the conversion cap and the sleeve bin by means of a rotary locking manner, the rotary locking mechanism adopts more parts, and the locking mechanism can be blocked in the rotating process.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a puncture outfit shell, which solves the problem that a rotary locking mechanism between two puncture outfit shell parts is easy to be blocked in the process of poking and rotating in the prior art.

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 that selectively connects the first housing member with the second housing member;

the locking mechanism comprises a locking piece and a fitting piece; the locking member is arranged on the second housing part, and the matching piece is arranged on the first housing part;

under the action of the elastic force of the elastic piece, the locking piece is clamped with the mating piece; the locking piece overcomes the elastic force to generate movement under the action of external force, so that the locking piece is separated from the matching piece; said engagement and disengagement effecting selective connection of said first housing member with said second housing member; the movement comprises one or more of translation, elastic deformation and pivoting;

the mating member includes a projection provided to the first housing member; the locking piece comprises a limiting part; the limiting part is clamped with the lug under the action of the elastic force, and the movement enables the limiting part to be separated from the lug; the locking piece is clamped with the matching piece through the clamping, and the locking piece is separated from the matching piece through the separation;

the pivoting pivot shaft is arranged on the second shell part, and the elastic part is arranged between the limiting part and the pivot shaft.

Preferably, the locking member comprises a locking ring and a pressing member; the locking ring is translated in a direction perpendicular to the axial direction of the second housing part by the pressing piece.

Preferably, the locking ring is moved to an initial position in a direction perpendicular to an axial direction of the second housing part by an elastic force of the elastic member, and the locking ring is engaged with the engaging piece.

Preferably, the elastic member is a spring, a first stopper is arranged on the locking ring, a second stopper is arranged on the second housing part, and the spring is arranged between the first stopper and the second stopper.

Preferably, the locking ring comprises at least one limiting piece, and the pressing piece is arranged outside the locking ring and is arranged adjacent to one limiting piece;

the mating member is at least one protrusion arranged on the lower end surface of the first housing member, and the protrusion is selectively engaged with or disengaged from the limiting member.

Preferably, the at least one limiting member includes two first limiting portions symmetrically arranged along a radial direction of the locking ring;

the at least one lug comprises two first lugs which are symmetrically arranged along the radial direction of the first shell part, and the two first lugs are selectively clamped or separated with the two first limiting parts in a one-to-one correspondence mode.

Preferably, the at least one position limiting member further includes two second position limiting portions symmetrically disposed along another radial direction of the locking ring, the another radial direction being perpendicular to the one radial direction;

the lug comprises two second lugs which are symmetrically arranged along the other radial direction of the first shell part, and the two second lugs are respectively and selectively clamped or separated from the two second limiting parts in a one-to-one correspondence mode.

Preferably, the locking member comprises a locking ring and a pressing member; the locking ring is elastically deformed in a direction perpendicular to the axial direction of the second housing part by the pressing piece to disengage the locking ring from the mating piece.

Preferably, the locking ring comprises at least one limiting piece, and the at least one limiting piece is a concave part which is formed at the bottom of the locking ring and is formed by sinking from bottom to top; the pressing piece is arranged on the outer side of the locking ring at the position of one limiting piece; the engaging piece is at least one protruding block arranged on the lower end face of the first housing part, and the at least one protruding block is selectively clamped or separated with the at least one limiting piece.

Preferably, the position-limiting member includes two first position-limiting portions symmetrically disposed along one radial direction of the locking ring and two second position-limiting portions symmetrically disposed along the other radial direction of the locking ring, and the one radial direction is perpendicular to the other radial direction; the number of the pressing pieces is two, and the pressing pieces are arranged in one-to-one correspondence with the first limiting parts.

Preferably, the protrusions include two first protrusions symmetrical in one radial direction of the first housing part and two second protrusions symmetrical in the other radial direction of the first housing part, the one radial direction and the other radial direction being perpendicular to each other; the bayonet of the first bump faces the direction of the central axis of the first shell part, and the bayonet of the second bump faces the direction far away from the central axis of the first shell part.

Preferably, the position-limiting member includes two first position-limiting portions symmetrically disposed along one radial direction of the locking ring and two second position-limiting portions symmetrically disposed along the other radial direction of the locking ring, and the one radial direction is perpendicular to the other radial direction; the number of the pressing pieces is two, and the pressing pieces and the first limiting parts are arranged in a one-to-one correspondence manner; the first lug is clamped with or separated from the first limiting part, and the second lug is clamped with or separated from the second limiting part.

Preferably, two side walls of each pressing piece are arranged on the outer peripheral surface of the locking ring at the position of the corresponding first limiting part, and a through hole which is through up and down is formed between the two side walls of each pressing piece and the corresponding first limiting part.

Preferably, a moving block is arranged on the outer peripheral surface of the locking ring above each second limiting part; the second housing part is provided with two displacement grooves, the extension direction of each displacement groove is parallel to the other radial direction, and each displacement block is at least partially positioned in the corresponding displacement groove.

Preferably, the locking member includes the pivot shaft and a swing arm, the swing arm being pivotable about the pivot shaft, the elastic member being disposed between the swing arm and the pivot shaft.

Preferably, the elastic member is a spring or a part of the locking member, and the part of the locking member has elasticity and can generate elastic deformation; the spring comprises a pressure spring and a torsion spring.

Preferably, the locking member includes a first locking member and a second locking member, each of the first locking member and the second locking member including the pivot shaft and the swing arm.

Preferably, the first locking member and the second locking member are identical in structure, and the first locking member and the second locking member are symmetrically arranged with respect to a central axis of the second housing part.

Preferably, one end of the spiral arm is provided with a first limiting part, the other end of the spiral arm is provided with a second limiting part, and the first limiting part and the second limiting part are clamped with or separated from the lug.

Preferably, one end of the swing arm is provided with a pressing part, the pressing part comprises a pressing part, and the pressing part comprises the first limiting part and a through hole.

Preferably, the radial arm comprises a first radial arm and a second radial arm, and the pivot shaft is arranged between the first radial arm and the second radial arm; an arc or a bevel is formed between the first radial arm and the second radial arm.

Preferably, the lug comprises a first lug and a second lug, and the bayonet of the first lug and the bayonet of the second lug are opposite in direction; the first lug is clamped with or separated from one end of the spiral arm, and the second lug is clamped with or separated from the other end of the spiral arm.

Preferably, the first housing part is a conversion cap, the conversion cap comprises a sealing cover and a sealing seat, and the sealing cover and the sealing seat are axially connected; the lug is arranged on the lower end face of the sealing seat.

Preferably, the second housing part is a sleeve bin, the sleeve bin comprises a sleeve cover and a sleeve seat, the sleeve cover and the sleeve seat are axially connected, and a limiting hole for the fitting piece to pass through is formed in the end face of the sleeve cover; the locking piece is located between the cannula cover and the cannula holder.

Compared with the prior art, the invention has the beneficial effects that: the puncture outfit shell of the invention realizes the selective connection between the two shell parts by adopting a locking mechanism, and the locking mechanism comprises a locking piece and a matching piece which are respectively arranged on the two shell parts. The locking mechanism enables the locking piece to be in one or combination of more than two of translation, elastic deformation and pivoting through a pressing operation mode, so that the locking piece is clamped or separated from the matching piece, and the defect that the rotary locking mechanism is easy to block is avoided.

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

The advantages of the puncture outfit of the invention relative to the prior art are the same as the advantages of the puncture outfit shell relative to the prior art, and therefore, the description is omitted.

Drawings

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

FIG. 2 is an exploded view of a puncture instrument housing according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a mating member according to a first embodiment of the invention;

FIG. 4 is a schematic structural diagram of a locking element according to a first embodiment of the invention;

FIG. 5 is a schematic structural diagram of a cannula cover according to a first embodiment of the present invention;

FIG. 6 is a schematic view of the assembled locking member and cannula cover according to the first embodiment of the present invention;

FIG. 7 is a schematic view of a first embodiment of the invention showing a latch mechanism in a latched state;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a schematic view of a locking mechanism according to a first embodiment of the present invention in an unlatched state;

FIG. 10 is a top view of FIG. 9;

fig. 11 is a schematic structural view of a puncture instrument housing according to a second embodiment and a third embodiment of the present invention;

FIG. 12 is an exploded view of a second penetrator housing in accordance with an embodiment of the present invention;

FIG. 13 is a schematic structural view of a fitting according to a second embodiment of the present invention;

FIG. 14 is a schematic structural view of a locking member according to a second embodiment of the present invention;

FIG. 15 is a schematic structural view of a cannula cover according to a second embodiment of the present invention;

fig. 16 is a schematic view showing a locked state of the locking mechanism according to the second embodiment of the present invention;

FIG. 17 is a top view of FIG. 16;

FIG. 18 is a schematic view of the latch mechanism according to the second embodiment of the present invention in an unlatched state;

FIG. 19 is a top view of FIG. 8;

FIG. 20 is an exploded view of a puncture instrument housing according to a third embodiment of the present invention;

FIG. 21 is a schematic structural view of a fitting according to a third embodiment of the present invention;

fig. 22 is a schematic structural view of a first lock member according to a third embodiment of the present invention;

FIG. 23 is a schematic view of the assembled locking member and cannula cover in accordance with the third embodiment of the present invention;

fig. 24 is a schematic view showing a locked state of the locking mechanism according to the third embodiment of the present invention;

FIG. 25 is a top view of FIG. 24;

FIG. 26 is a schematic view of a third embodiment of the present invention showing the latch mechanism in an unlatched state;

fig. 27 is a top view of fig. 26.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Axial refers to a direction along a central axis or a direction parallel to a central axis.

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 and 10, the present invention 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 includes a locking member 41 and a fitting member 31, the locking member 41 being provided on the second housing part, and the fitting member 31 being 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 to or separated from each other by the locking mechanism 30. The term "disposed" in the present invention includes integrally formed and interconnected.

In one form of the invention, the first housing member is a conversion cap 10, the second housing member is a cannula cartridge 20, and a latch mechanism 30 is disposed between the conversion cap 10 and the cannula cartridge 20. Of course, the locking mechanism 30 of the present invention is not limited to selectively connecting the conversion cap 10 and the cannula cartridge 20, and the locking mechanism 30 of the present embodiment may be applied to any puncture instrument housing part that needs to be disassembled.

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 a direction parallel to the central axis of the puncture device housing, "lower" refers to a direction toward the cannula cartridge 20 along a direction parallel to the central axis of the puncture device housing, "top surface" refers to one surface of the uppermost surface of the component, "bottom surface" refers to one surface of the lowermost surface of the component, "inner", "outer", "upper", "lower", "top surface" and "bottom surface" are defined as applicable to all components of the puncture device housing of the present embodiment.

Referring to fig. 2, 12 and 20, the conversion cap 10 includes a sealing cover 11 and a sealing seat 12, and the sealing cover 11 and the sealing seat 12 are axially connected. The structure of the sealing cover 11 and the sealing seat 12 and the connection method thereof are conventional in the art, and thus, will not be described in detail. The sealing cover 11 is annular, the sealing cover 11 covers the sealing seat 12 to form the conversion cap 10, and a second seal is arranged in the conversion cap 10 to form a seal for an annular opening of the sealing cover 11. Cannula cartridge 20 includes cannula cover 21 and cannula holder 22, with cannula cover 21 and cannula holder 22 being axially connected. Cannula cover 21, cannula holder 22, and the manner in which cannula cover 21 and cannula holder 22 are attached are all conventional and will not be described in detail herein. The casing cover 21 is annular, the casing cover 21 covers the casing seat 22 to form the casing bin 20, and the first seal is arranged in the casing bin 20 to form a seal for the annular opening of the casing cover 21.

The locking mechanism 30 of the present invention includes a locking member 41 and a fitting member 31, wherein a portion of the locking member 41 is disposed in the cavity of the cartridge 20, and the fitting member 31 is disposed on the lower end surface of the seal holder 12. Locking member 41 may be a unitary piece that is disposed about the central axis of cannula cartridge 20 or may be a plurality of separate pieces that are disposed about the central axis of cannula cartridge 20.

Under the elastic force of the elastic element 46, the locking element 41 is engaged with the mating element 31; the locking member 41 moves against the elastic force under the action of the external force, so that the locking member 41 is disengaged from the mating member 31; the clamping and the disengagement realize the selective connection of the conversion cap 10 and the sleeve bin 20; the movement comprises one or more of translation, elastic deformation and pivoting.

Specifically, the mating member 31 includes a protrusion 32 disposed on the conversion cap 10; the locking member 41 includes a stopper 44; the limiting piece 44 is clamped with the lug 32 under the action of elastic force, and the limiting piece 44 is separated from the lug 32 by movement; the engagement realizes the engagement of the locking member 41 with the mating member 31, and the disengagement realizes the disengagement of the locking member 41 from the mating member 31.

The locking mechanism 30 of the present invention can be constructed in various ways according to various movement modes of the locking member 41, and the present invention will be further described with reference to the first to third embodiments.