WO2020024606A1 - Trocar housing and trocar - Google Patents

Abstract

Disclosed are a trocar housing and a trocar. The trocar housing comprises a first housing component, a second housing component, and a locking mechanism for selectively connecting the first housing component to the second housing component. The locking mechanism comprises locking members and matching members. The locking member is provided in the second housing component. The matching member is provided in the first housing component. Under the elastic force of an elastic member, the locking members are engaged with the matching members. Under the function of an external force, the locking member overcomes the elastic force to generate the motion so that the locking member is separated from the matching member. Engaging and separating achieve the selective connection between the first housing component and the second housing component. The motion comprises one or a combination of more than two of translation, elastic deformation, and pivot. The trocar comprises the trocar housing. According to the trocar housing in the present invention, the selective connection between the two housing components is achieved by pressing the locking mechanism, and the jamming defect of the rotary locking mechanism is overcome.

Description

Shell of puncture device and puncture device Technical field

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

Background technique

A puncture is a surgical instrument used to establish an access to the abdominal cavity. The puncture device usually includes a cannula assembly and a puncture core rod. The general clinical use method is: first make a small incision in the patient's abdomen, then pass the distal end of the puncture core rod through the cannula assembly, and expose the distal end of the puncture core rod from the distal end of the cannula assembly. The doctor holds the proximal end of the puncture mandrel and applies a puncture operation force to the puncture device, so that the distal end of the puncture mandrel is inserted into the abdominal cavity and the distal end of the cannula assembly also enters the interior of the abdominal cavity. The components form a passage for surgical instruments to and from the abdominal cavity.

In surgery, it is usually necessary to establish and maintain a stable pneumoperitoneum so that sufficient surgical operation space is formed inside the abdominal cavity. In order to avoid pneumoperitoneum leakage, a casing cannula at the proximal end of the cannula is usually connected to achieve further sealing. The conversion cap is arranged between the casing and the holding part of the puncture core rod. In the disclosed prior art, a first seal is provided in the casing and a second seal is provided in the conversion cap. Due to the different seal structures, the first seal is usually no puncture in the casing assembly. The core rod or surgical instrument provides a sealing effect. The second seal is usually a sealing function when the surgical instrument passes through the casing assembly. The casing and the conversion cap work together to ensure the stability of the pneumoperitoneum. The conversion cap is locked by a locking mechanism. First of all, when the casing and the conversion cap are connected, the connection between the casing and the conversion cap needs to ensure good sealing. At the same time, generally, a locking mechanism is needed to achieve the separation of the casing and the conversion cap during surgery. After the conversion cap is removed, the tissue sample can be taken out more easily, and the damage of the tissue sample during the removal process can be reduced.

The existing rotary locking mechanism usually requires the use of rotary locking to achieve the selective connection between the conversion cap and the casing. The rotary locking mechanism uses many parts, and the locking mechanism may be damaged during the rotation process. Stuck.

Summary of the invention

In view of the shortcomings of the prior art, the present invention aims to provide a puncture device housing, which solves the problem that the rotation lock mechanism between two puncture device housing components in the prior art is prone to jamming during the dial rotation operation.

The present invention is achieved by the following technical solutions: a puncture housing, comprising a first housing component, a second housing component, and a locking mechanism for selectively connecting the first housing component and the second housing component;

The locking mechanism includes a locking member and a matching member; the locking member is provided on the second housing member, and the matching member is provided on the first housing member;

Under the action of the elastic force of the elastic member, the locking member is engaged with the mating member; the locking member moves under the action of the elastic force to overcome the elastic force, so that the locking member is detached from the mating member; Combining and disengaging to realize the selective connection of the first shell component and the second shell component; the movement includes one or a combination of two or more of translation, elastic deformation, and pivoting;

The fitting piece includes a protrusion provided on the first housing component; the locking piece includes a limiting portion; the limiting portion engages with the protrusion under the elastic force, and the movement causes the The limiting portion is disengaged from the convex block; the engagement realizes the engagement of the locking member and the mating member, and the disengaging realizes the disengagement of the locking member from the mating member;

The pivoting pivot shaft is disposed on the second housing component, and the elastic member is disposed between the limiting portion and the pivot shaft.

Preferably, the locking member includes a locking ring and a pressing member; the locking ring is translated in a direction perpendicular to the axial direction of the second housing component under the action of the pressing member.

Preferably, the locking ring is moved to an initial position in a direction perpendicular to the axial direction of the second housing component under the elastic force of the elastic member, so that the locking ring can be engaged with the mating member.

Preferably, the elastic member is a spring, a first stopper is provided on the lock ring, a second stopper is provided on the second housing part, and the spring is provided between the first stopper and the Said between the second stoppers.

Preferably, the lock ring includes at least one stopper, and the pressing member is disposed outside the lock ring and is disposed adjacent to one of the stoppers;

The mating member is at least one protrusion provided on a lower end surface of the first housing component, and the protrusion is selectively engaged or disengaged from the stopper.

Preferably, the at least one stopper includes two first stoppers disposed symmetrically along a radial direction of the locking ring;

The at least one bump includes two first bumps that are symmetrically arranged along a radial direction of the first housing part, and the two first bumps correspond to the two first limiting portions one to one respectively. Selective engagement or disengagement.

Preferably, the at least one stopper further includes two second stoppers disposed symmetrically along another radial direction of the locking ring, the other radial direction and the one radial direction being perpendicular to each other;

The projection includes two second projections symmetrically arranged along the other radial direction of the first housing part, and the two second projections are respectively selected one-to-one corresponding to the two second limiting portions. Sexual engagement or disengagement.

Preferably, the locking member includes 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 component under the action of the pressing member, so that the locking ring Disengaged from the mating piece.

Preferably, the locking ring includes at least one stopper, and the at least one stopper is a recess formed at the bottom of the lock ring and formed by depression from bottom to top; the pressing member is disposed on a certain of the The outside of the locking ring at the position where the stopper is located; the mating member is at least one projection provided on the lower end face of the first housing component, and the at least one projection and the at least one stopper are selected Sexual engagement or disengagement.

Preferably, the limiter includes two first limiters symmetrically disposed along one radial direction of the lock ring and two second limiters symmetrically disposed along another radial direction of the lock ring, The one radial direction and the other radial direction are perpendicular to each other; there are two pressing members, and the pressing members are arranged one-to-one corresponding to the first limiting portion.

Preferably, the bumps include two first bumps that are symmetric along one radial direction of the first housing part and two second bumps that are symmetric along another radial direction of the first housing part. The one radial direction and the other radial direction are perpendicular to each other; the bayonet of the first projection faces the direction of the central axis of the first housing part, and the bayonet of the second projection faces away from the first Orientation of the center axis of the housing part.

Preferably, the limiter includes two first limiters symmetrically disposed along one radial direction of the lock ring and two second limiters symmetrically disposed along another radial direction of the lock ring, The one radial direction and the other radial direction are perpendicular to each other; there are two pressing members, and the pressing members are arranged one-to-one corresponding to the first limiting portion; the first bump and the first A limiting portion is engaged or disengaged, and the second bump is engaged or disengaged from the second limiting portion.

Preferably, two side walls of each of the pressing members are disposed on an outer peripheral surface of the locking ring at a position where the corresponding first limiting portion is located, and the two side walls of the pressing member correspond to A through hole penetrating up and down is formed between the first limiting portions.

Preferably, a shifting block is provided on the outer peripheral surface of the locking ring above each of the second limiting portions; two shifting grooves are provided on the second housing part, and each of the shifting grooves The extending direction is parallel to the other radial direction, and each of the moving blocks is at least partially located in the corresponding displacement groove.

Preferably, the locking member includes the pivot shaft and a swing arm, the swing arm is pivotable about the pivot shaft, and the elastic member is 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 is elastic and can generate elastic deformation; the spring includes a compression spring and a torsion spring.

Preferably, the lock member includes a first lock member and a second lock member, and the first lock member and the second lock member each include the pivot shaft and the swing arm.

Preferably, the first locking member has the same structure as the second locking member, and the first locking member and the second locking member are symmetrically disposed with respect to a central axis of the second housing member.

Preferably, a first limit portion is provided at one end of the spiral arm, and a second limit portion is provided at the other end of the spiral arm, and the first limit portion and the second limit portion and the second limit portion The bumps engage or disengage.

Preferably, a pressing member is provided at one end of the rotary arm, the pressing member includes a pressing portion, and the pressing portion includes the first limiting portion and a through hole.

Preferably, the swing arm includes a first swing arm and a second swing arm, and the pivot axis is disposed between the first swing arm and the second swing arm; the first swing arm and the first swing arm An arc or chamfer is formed between the two swivel arms.

Preferably, the convex block includes a first convex block and a second convex block, and the bayonet of the first convex block and the second convex block are opposite to each other; and the first convex block and one end of the spiral arm Phase is engaged or disengaged, the second protrusion is engaged or disengaged with the other end of the spiral arm.

Preferably, the first housing component is a conversion cap, and the conversion cap includes a sealing cap and a sealing seat, and the sealing cap and the sealing seat are connected in the axial direction; the projection is disposed below the sealing seat. End face.

Preferably, the second casing component is a casing silo, the casing silo includes a casing cover and a casing seat, the casing cover and the casing seat are connected in the axial direction, A limiting hole is provided on the end surface for the fitting piece to pass through; the locking piece is located between the sleeve cover and the sleeve seat.

Compared with the prior art, the present invention has the beneficial effect that the puncture device housing of the present invention adopts a locking mechanism to realize selective connection between two housing components, and the locking mechanism includes a locking member and a matching member respectively disposed on the two housing components. The locking mechanism causes one or more combinations of translation, elastic deformation, and pivoting of the locking member through a pressing operation mode, thereby achieving engagement or disengagement with the mating member, thereby avoiding the easy appearance of the rotary locking mechanism. Stuck defect.

The invention also provides a puncture device, comprising the aforementioned puncture housing.

The beneficial effects of the puncture device of the present invention with respect to the prior art are the same as the beneficial effects of the above-mentioned puncture device housing with respect to the prior art, and therefore are not repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of a trocar shell according to a first embodiment of the present invention;

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

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

4 is a schematic structural diagram of a locking member according to the first embodiment of the present invention;

5 is a schematic structural diagram of a casing cover according to Embodiment 1 of the present invention;

6 is a schematic structural diagram of a locking member and a sleeve cover after being assembled according to Embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of an engagement state of a locking mechanism according to the first embodiment of the present invention; FIG.

Figure 8 is a top view of Figure 7;

9 is a schematic diagram of an unlocked state of a locking mechanism according to the first embodiment of the present invention;

10 is a plan view of FIG. 9;

11 is a schematic structural diagram of a trocar shell according to Embodiments 2 and 3 of the present invention;

12 is an exploded view of a puncture device housing according to a second embodiment of the present invention;

13 is a schematic structural diagram of a mating member according to a second embodiment of the present invention;

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

15 is a schematic structural diagram of a casing cover according to Embodiment 2 of the present invention;

FIG. 16 is a schematic diagram of an engagement state of a locking mechanism according to Embodiment 2 of the present invention; FIG.

17 is a plan view of FIG. 16;

18 is a schematic diagram of an unlocked state of a locking mechanism according to Embodiment 2 of the present invention;

Figure 19 is a top view of Figure 8;

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

21 is a schematic structural diagram of a mating member according to Embodiment 3 of the present invention;

22 is a schematic structural diagram of a first locking member according to a third embodiment of the present invention;

23 is a schematic structural diagram of a locking member and a sleeve cover after being assembled according to Embodiment 3 of the present invention;

FIG. 24 is a schematic diagram of an engagement state of a locking mechanism according to Embodiment 3 of the present invention; FIG.

25 is a top view of FIG. 24;

FIG. 26 is a schematic diagram of an unlocked state of a locking mechanism according to Embodiment 3 of the present invention; FIG.

FIG. 27 is a plan view of FIG. 26.

detailed description

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The axial direction refers to a direction along the central axis or a direction parallel to the central axis.

The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

Referring to FIG. 1 and FIG. 10, the present invention provides a puncture device housing including a locking mechanism 30 and a first housing component and a second housing component selectively connected by the locking mechanism 30. The locking mechanism 30 includes a locking member 41 and a mating member 31. The locking member 41 is disposed on the second shell member, and the mating member 31 is disposed on the first shell member. The “selective connection” herein means that the first housing component and the second housing component can be connected to or separated from each other by the locking mechanism 30. The "setting" in the present invention includes integral molding and interconnection.

In one aspect of the present invention, the first housing component is a conversion cap 10, the second housing component is a casing casing 20, and the locking mechanism 30 is disposed between the conversion cap 10 and the casing casing 20. Of course, the locking mechanism 30 in the present invention is not limited to the selective connection of the conversion cap 10 and the casing 20, and the locking mechanism 30 in this embodiment can be applied to any puncture device shell component that needs to be disassembled.

It should be noted that, in order to more clearly describe the structure of the puncture shell of the present invention, in this embodiment, “inner” means a direction toward the central axis of the puncture shell, and “outer” means away from the center of the puncture shell The direction of the axis, "up" refers to the direction parallel to the central axis of the puncture housing toward the conversion cap 10, and "down" refers to the direction parallel to the central axis of the puncture housing toward the cannula 20, " "Top surface" refers to the top surface of the component, "bottom surface" refers to the bottom surface of the component, "inside", "outside", "upper", "down", "top surface", and "bottom surface" The definition applies to all parts of the puncture housing of this embodiment.

2, FIG. 12 and FIG. 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 structures of the sealing cover 11 and the sealing seat 12 and their connection methods are the prior art, so they will not be described in detail here. The sealing cap 11 is ring-shaped. The sealing cap 11 covers the sealing seat 12 to form a conversion cap 10. A second seal is provided in the conversion cap 10 to form a seal on the annular opening of the sealing cap 11. The casing box 20 includes a casing cover 21 and a casing seat 22, and the casing cover 21 and the casing seat 22 are connected in the axial direction. The casing cover 21, the casing base 22, and the connection methods of the casing cover 21 and the casing base 22 are all prior art, so they will not be described in detail here. The casing cover 21 is ring-shaped. The casing cover 21 covers the casing seat 22 to form a casing bin 20, and a first seal is provided in the casing casing 20 to form a seal against the annular surface opening of the casing cap 21.

The locking mechanism 30 in the present invention includes a locking member 41 and a mating member 31, wherein a part of the locking member 41 is disposed in a cavity of the casing 20, and the mating member 31 is disposed on a lower end surface of the sealing seat 12. The locking member 41 may be an integral piece integrated around the central axis of the casing bin 20, or may be a plurality of independent pieces provided around the central axis of the casing bin 20.

Under the action of the elastic force of the elastic member 46, the locking member 41 is engaged with the mating member 31; the locking member 41 overcomes the elastic force under the action of the external force to cause the locking member 41 to disengage from the mating member 31; the engaging and disengaging realize the conversion cap 10 and Selective connection of the casing 20; the above motion includes one or a combination of two or more of translation, elastic deformation, and pivoting.

Specifically, the mating member 31 includes a projection 32 provided on the conversion cap 10; the locking member 41 includes a stopper 44; the stopper 44 engages with the projection 32 under the action of the elastic force, and the movement makes the stopper 44 and the projection The block 32 is disengaged; the engagement realizes the engagement of the locking member 41 and the mating member 31, and the disengagement realizes the disengagement of the locking member 41 and the mating member 31.

According to the multiple movement modes of the locking member 41 described above, the locking mechanism 30 in the present invention can adopt various structures. The following describes the present invention in the first to third embodiments.

Example one

The external shape of the trocar shell in this embodiment is shown in FIG. 1.

Referring to FIG. 2 and FIG. 4, in order to more clearly describe the mated structure, relative to the upper and lower positional relationship of each component in FIG. 1 and FIG. 2, FIG. On the contrary, when using text descriptions, the up and down positional relationships and directions shown in Figs. 1 and 2 are still used. Similarly, if the up and down positional relationships of other drawings are inconsistent with those of Figs. 1 and 2, The description is unchanged. The locking member 41 includes a pressing member 43 and a locking ring 42. The locking ring 42 is disposed between the casing cover 21 and the casing seat 22. Further, the bottom surface of the casing cover 21 and / or the top surface of the casing seat 22 are provided with A slot that houses the locking ring 42 is movable in the slot in a direction perpendicular to the axial direction of the casing 20. The ring wall of the locking ring 42 has a certain height along the axial direction of the casing bin 20, and the "height" herein means that the top surface and the bottom surface of the locking ring 42 have a certain distance in the axial direction, and the distance is the lock. The height of the ring 42. A limiting member 44 is provided on the ring wall of the locking ring 42. The limiting member 44 includes two first limiting portions 44 a and two second limiting portions 44 b.

The two first limiting portions 44 a are part of the ring wall of the locking ring 42, as shown in FIG. 4. The two first limiting portions 44a are symmetrical along a radial direction of the casing bin 20. That is, the two first limiting portions 44a are respectively located at both ends of the one diameter. The first limiting portions 44a are formed on the lock. A recess formed at the bottom of the ring 42 and recessed from the bottom to the top. The recess is a first limiting opening 44 a 1 for receiving a part of the fitting piece 31. It should be noted that the bottom surface and the top surface are relative to the positions shown in FIG. 1 and FIG. 2, and the bottom surface is located above the top surface in FIG. 4. Both side walls of the pressing member 43 are disposed on the outer peripheral surface of the lock ring 42 at the position of the corresponding first limiting portion 44a. The two side walls of the pressing member 43 and the corresponding first limiting portion 44a are formed. Up and down through holes 45.

The two second limiting portions 44b on the locking ring 42 are symmetrical along the other radial direction of the casing bin 20, that is, the two second limiting portions 44b are located at two ends of the other diameter. The connection line between the two second limiting portions 44b and the connection line between the two first limiting portions 44a are perpendicular to each other. Each second limiting portion 44b includes a first step 44b1 and a second step 44b2, wherein the bottom surface of the first step 44b1 is flush with the bottom surface of the ring wall of the lock ring 42, and the bottom surface of the second step 44b2 is higher than the first step The bottom surface of 44b1, the bottom surface of the second step 44b2, and the elevation of the first step 44b1 together form a second limit opening 44b3 for receiving a part of the mating member 31. A gap 44b4 penetrating up and down is formed between the elevation of the second step 44b2 and one elevation of the ring wall of the lock ring 42. The elevation is formed by the axial plane and the lock of the arc-shaped chord of the lock ring 42 The rings 42 intersect and form. The extending direction of each second step 44b2 is perpendicular to the connecting line between the two second limiting portions 44b.

Of course, the second step 44b2 can also be arranged in other ways: the second step 44b2 is provided inside the ring wall of the lock ring 42, and the second step 44b2 is a convex body protruding toward the central axis direction. The bottom surface of the second step 44b2 is located between the top surface and the bottom surface of the ring wall. In this way, the bottom surface of the second step 44b2 and the elevation and bottom surface of the ring wall above the position where it is located form the first step 44b1. The spaces on the left and right sides of the second step 44b2 can be used as accommodation spaces to accommodate a part of the mating member 31. In this case, the accommodation space corresponds to the notch 44b4, that is, the accommodation space or the notch 44b4 is no longer formed in the ring wall.

As shown in FIG. 4, the lock ring 42 is further provided with two elastic members 46, which are preferably springs. The compression direction of the spring is the same as the movement direction of the lock member 41. The lock ring 42 is provided with a first stopper 421. A second stopper 216 is provided on the sleeve cover 21, and a spring is disposed between the first stopper 421 and the second stopper 216. One end of the first stopper 421 is provided on the elevation surface of the ring wall of the lock ring 42, and the other end of the first stopper 421 is provided on a cut surface outside the ring wall of the lock ring 42 at the second limit portion 44 b and is locked. The ring 42 forms an integrated structure, which facilitates the integral movement of the locking member 41 in the casing. The elevation surface is formed by a plane in the axial direction where the arc-shaped chord of the lock ring 42 intersects with the lock ring 42, or the elevation surface is parallel with the surface formed by the intersection. The first stopper and the locking ring 42 may be fixedly connected or integrally formed. Specifically, referring to FIG. 5, in order to describe the mated structure more clearly, relative to the upper and lower positional relationships of the components in FIGS. 1 and 2, FIG. 5 is rotated 180 degrees. The sleeve cover 21 has a ring shape, and includes an annular end surface 212, a cover inner shell 213, and a cover shell 214. An annular groove 215 is formed between the cover inner shell 213, the ring end face 212, and the cover shell 214 to receive the lock 41. The lock 41 It is movable in the annular groove 215 in a direction perpendicular to the axial direction of the sleeve cover 21. The annular end surface 212 is provided with four upper and lower limiting holes 211 for the fitting member 31 to pass through. The second end block 216 is provided on the bottom surface of the annular end surface 212.

The locking member 41 is disposed in the annular groove 215 of the sleeve cover 21. See FIG. 6. In order to describe the structure after the fitting more clearly, relative to the upper and lower positions of the components in FIGS. 1 and 2, FIG. 6 is also rotated 180 degree. When the locking member 41 is in the original position, the positions of the two first limiting portions 44 a and the two second limiting portions 44 b correspond to the positions of the four limiting holes 211 on the sleeve cover 21. The pressing member 43 partially protrudes out of the cover case 214 to facilitate pressing operation. The first stopper 421 on the locking member 41 is opposite to the second stopper 216 on the annular end surface 212 and forms a space for receiving a spring. The first stopper 421 includes a first abutting wall 4211 and a first side wall 4212. The first abutting wall 4211 and the first side wall 4212 are all disposed perpendicular to the annular end surface 212, and the first abutting wall 4211 and the first A side wall 4212 is perpendicular to each other. The second stopper 216 includes a second abutting wall 2161 and a second side wall 2162. The second abutting wall 2161 and the second side wall 2162 are both perpendicular to the annular end surface 212. The connecting wall 2161 and the second sidewall 2162 are perpendicular to each other. The first abutting wall 4211 and the second abutting wall 2161 are opposite to each other and are respectively fixed to both ends of the spring. The extending directions of the first side wall 4212 and the second side wall 2162 are on the same straight line and the first side wall 4212 A distance from the second side wall 2162 defines a compression stroke of the corresponding spring, that is, a displacement of the locking member 41.

Referring to FIG. 2 and FIG. 3, the fitting piece 31 is four protrusions 32 provided on the lower end surface of the sealing seat 12. Of the four bumps 32, two are first bumps 32a, two are second bumps 32b, two first bumps 32a are arranged symmetrically, two second bumps 32b are arranged symmetrically, and two first protrusions The line of the block 32a and the line of the two second bumps 32b are perpendicular to each other. Each of the bumps 32 is “L” -shaped and includes a first extension portion 321 and a second extension portion 322. The first extension portion 321 extends from the lower end surface of the seal seat 12 and extends along the axial direction of the seal seat 12. The second extension portion 322 and the first extension portion 321 are perpendicular to each other. One end of the first extension portion 321 is integrally formed with the lower end surface of the sealing seat 12, and the other end is integrally formed with the end portion of the second extension portion 322. The widths of the first bumps 32a and the second bumps 32b are set according to the first limiting portion 44a and the second limiting portion 44b. The width of the first limiting portion 44a is greater than the width of the second limiting portion 44b. Correspondingly, the width of the first bump 32a mating with the first limiting portion 44a is greater than the width of the second bump 32b mating with the second limiting portion 44b. The first protrusions 32a and the second extensions 322 of the second protrusions 32b both extend in the same direction. Specifically, after the mating member 31 and the locking member 41 are assembled, the first protrusions 32a and the second protrusions 32b The second extending portions 322 each extend in a direction away from the pressing member 43.

When the conversion cap 10 and the casing 20 are assembled, press the pressing member 43 with one finger, and push the pressing member 43 in the direction of the central axis of the casing 20, so that the entire locking member 41 moves in the pressing direction, and the locking ring 42 The first stopper 421 moves toward the second stopper 216 and compresses the spring. The stopper 44 on the lock ring 42 is offset relative to the stopper hole 211 on the sleeve cover 21 to make room for the protrusion 32. Referring to FIGS. 9 and 10, the first protrusion 32 a corresponds to the first limiting portion 44 a, and the second protrusion 32 b corresponds to the second limiting portion 44 b. The conversion cap 10 and the casing 20 are aligned in the axial direction, and the first protrusion 32a and the second protrusion 32b pass through the limiting hole 211 on the sleeve cover 21, one of the first protrusion 32a then passes through the through hole 45 formed by the pressing member 43, and the two second protrusions 32b enter the two respectively In the notch 44b4 formed at the second limiting portion 44b.

7 and 8, the locking member 41 is released, and the locking member 41 returns to the original position under the action of the spring. The second extension portion 322 of each of the first projections 32 is located at a position corresponding to the first limit portion 44 a. In a position-limiting opening 44a1, each first position-limiting portion 44a is located in a bayonet formed corresponding to the first projection 32a, so that the first position-limiting portion 44a and the first projection 32a are engaged with each other. The second extension portion 322 of the block 32b is located in the second limit opening 44b3 formed corresponding to the second limit portion 44b, and each second limit portion 44b is located in the bayonet formed corresponding to the second protrusion 32b, so that the second The limiting portion 44b is engaged with the second bump 32b.

The four protrusions 32 and the two first limiting portions 44 a and the two second limiting portions 44 b form four engaging points of the locking mechanism 30 to ensure a stable connection between the conversion cap 10 and the casing bin 20.

When the tissue sample to be taken is relatively large, the assembled puncture housing needs to be disassembled to facilitate the removal of the tissue sample and reduce the damage of the tissue sample during the removal process. When there is no puncture core rod or surgical instrument in the disassembled puncture device, the first seal in the casing 20 is mainly used for sealing. Referring to FIG. 9 and FIG. 10, when the puncture device housing assembled in this embodiment is disassembled, the pressing member 43 on the locking ring 42 is pressed, and the pressing direction is toward the central axis of the casing 20. During the pressing process, the locking member 41 as a whole moves in the pressing direction, the two first stoppers 421 on the lock ring 42 move toward the second stopper 216 and compress the spring, so that the two first projections 32a leave the corresponding first limit opening 44a1, and at the same time, The two first limiting portions 44a are released from the bayonet of the first protrusion 32a, the two second protrusions 32b leave the corresponding second limiting opening 44b3, and at the same time, the second of the two second limiting portions 44b The step 44b2 is released from the bayonet of the second protrusion 32b, so that the two second protrusions 32b are located in the gap 44b4 as a whole. At this time, each of the bumps 32 is removed from the through hole 45 and the limiting hole 211, so that the conversion cap 10 and the casing bin 20 can be separated, thereby achieving the disassembly of the puncture device housing in this embodiment. When the pressing of the locking member 41 is released, the locking member 41 returns to the initial position.

Example two

The external shape of the trocar shell in this embodiment is shown in FIG. 11.

Referring to FIG. 12 and FIG. 13, in one embodiment of the present invention, the mating member 31 is four protrusions 32 provided on the lower end surface of the sealing seat 12. Specifically, of the four protrusions 32, two are the first protrusions 32a, two are the second protrusions 32b, and the two first protrusions 32a are symmetrically arranged along a radial direction of the lower end surface of the sealing seat 12, that is, The two first bumps 32a are respectively located at two ends of the diameter, and the two second bumps 32b are symmetrically arranged along the other diameter of the lower end surface of the sealing seat 12, that is, the two second bumps 32b are respectively located approximately At the two ends of the other diameter, the four protrusions 32 are uniformly arranged along the torus of the lower end of the sealing seat 12, that is, the connection line of the two first protrusions 32 a and the connection line of the two second protrusions 32 b are perpendicular to each other. In order to simplify the structure of the bumps 32, each of the bumps 32 is of the same "L" shape and includes a first extension portion 321 and a second extension portion 322. The first extension portion 321 extends along the axial direction of the seal seat 12. The two extending portions 322 are perpendicular to the first extending portion 321, that is, the second extending portion 322 extends along the radial direction of the sealing seat 12. The second extension portion 322 of the first protrusion 32a extends toward the center axis of the seal seat 12 so that the bayonet of the first protrusion 32a faces the center axis of the seal seat 12; the second extension portion 322 of the second protrusion 32b faces The direction extending away from the central axis of the sealing seat 12 is such that the bayonet of the second projection 32 b faces away from the central axis of the sealing seat 12.

A part of the locking member 41 is disposed in the cavity of the casing bin 20 and the locking member 41 has elasticity, which can generate elastic deformation in the radial plane of the casing bin 20. The locking member 41 is arranged around the central axis of the casing bin 20, which is beneficial to The positioning of the locking member 41 in the casing 20 also facilitates corresponding to the position of the projection 32.

12 and FIG. 14, in an embodiment of the present invention, the locking member 41 is integrated, and includes a pressing member 43 and a locking ring 42. The locking ring 42 is disposed between the casing cover 21 and the casing seat 22; Ground, the bottom surface of the casing cover 21 and / or the top surface of the casing seat 22 are provided with grooves for receiving the locking ring 42. The locking member 41 using the overall structure can reduce the number of components of the locking mechanism 30 as a whole, simplify the structure of the locking mechanism 30, and facilitate quick disassembly and assembly between the conversion cap 10 and the casing bin 20. The above-mentioned locking ring 42 adopts a circular locking ring, which is convenient for being accommodated in the cavity of the casing casing 20 and is also elastically deformable. In order to ensure the elastic deformation of the locking ring 42, the locking ring 42 is made of a tough plastic or metal material, such as PP, PC, HDPE, copper, steel, titanium alloy and other materials.

The ring wall of the locking ring 42 extends along the axial direction of the casing bin 20 and has a certain height. In order to facilitate the installation of the casing cover 21 and the casing seat 22 to form the casing bin 20, the height of the locking ring 42 is set to enable locking. The ring 42 is completely contained in the cavity of the casing 20. The locking ring 42 includes at least one stopper 44. The stopper 44 may be separately provided on the ring wall of the locking ring 42, or may be a part of the ring wall of the locking ring 42. In order to simplify the structure of the locking ring 42, in one embodiment of the present invention, the limiting member 44 is a part of the ring wall of the locking ring 42. The limiting piece 44 is a concave portion formed at the bottom of the locking ring 42 and recessed from the bottom to the top, and is used for engaging with the protrusion 32. Corresponding to the setting of the bump 32, the limiting member 44 includes two first limiting portions 44a corresponding to one diameter along the casing bin 20 and two second limiting portions 44b corresponding to another diameter along the casing bin 20. The connection between the two first limiting portions 44a and the connection between the two second limiting portions 44b are perpendicular to each other. In order to facilitate the engaging operation, the wall thickness of the second limiting portion 44b may be increased. The two side walls of the two pressing members 43 are disposed outside the lock ring 42 at the position of the corresponding first limiting portion 44a, and the two side walls of each pressing member 43 and the corresponding first limiting portion 44a A through hole 45 is formed therethrough for passing through the first bump 32a.

Referring to FIG. 15, the end surface of the casing cover 21 is an annular surface, and the annular end surface of the casing cover 21 is provided with a plurality of limiting holes 211 through which the bumps 32 pass. Corresponding to the position and number of the bumps 32, the four limiting holes 211 are evenly arranged on the annular end surface of the sleeve cover 21. The lower end surface of the sleeve cover 21 is also provided with two displacement grooves 217. Referring to FIG. 16 and FIG. 17, in order to more clearly describe the mated structure, relative to the upper and lower positional relationships of the components in FIGS. 11 and 12, FIGS. 15 and 16 are rotated by 180 degrees. The extending direction of each displacement groove 217 is parallel to the connecting line between the two second limiting portions 44 b, that is, extends along the radial direction of the sleeve cover 21. A shifting block 47 is provided on the outer peripheral surface of the locking ring above each second limiting portion 44b, and at least a portion of each shifting block 47 is located in a corresponding shifting slot 217. With the elastic deformation of the locking ring 42, the shifting block 47 slides in the shift groove 217. The arrangement of the shifting block 47 and the shifting groove 217 makes the locking ring 42 elastically deform in the radial plane of the casing 20. 42 is deformed in the required direction. In addition, the setting of the shifting block 47 and the shifting groove 217 can also stabilize the position of the locking member 41 relative to the casing 20, and avoid unnecessary movement or shaking of the locking ring 42, which affects the conversion Disassembly and assembly of the cap 10 and the casing 20. The outer diameter of the lock ring 42 is smaller than the distance between the inner walls of the two shift grooves 217. The distance between the lock ring 42 and the inner wall of the shift groove 217 defines the sliding stroke of the corresponding shift block 47, and further limits Deformation amplitude. The positions of the first limit portion 44 a and the second limit portion 44 b correspond to the positions of the upper limit hole 211 of the sleeve cover 21. The two pressing members 43 are partially protruded from the casing of the casing bin 20, respectively, to facilitate pressing operations.

Referring to FIG. 18 and FIG. 19, when the conversion cap 10 is assembled with the casing bin 20, press the pressing member 43 with two fingers, respectively, and push the two pressing members 43 toward the center axis of the casing bin 20. The two second limits The shifting block 47 on the position portion 44b slides toward the outer end of the shifting groove 217 in the corresponding shifting groove 217. In this embodiment, "in" refers to the direction toward the central axis of the puncture housing, and "outer" refers to It is the direction away from the central axis of the puncture shell, and the definitions of the "inside" and "outer" directions are applicable to all parts of the puncture shell of this embodiment. The locking ring 42 is elastically deformed into an oval shape in the radial plane of the casing casing 20 (that is, in a direction perpendicular to the axial direction of the second housing component). The distance W1 decreases, and the distance W2 between the inner walls of the two second limiting portions 44b increases. The two first bumps 32a correspond to the two first limiting portions 44a, and the two second bumps 32b correspond to the two second limiting portions 44b. The central axes of the conversion cap 10 and the casing bin 20 are in the axial direction. Alignment, due to the deformation of the locking ring 42, the two first limiting portions 44a are two first bumps 32a, and the two second limiting portions 44b are two second bumps 32b, respectively, to make room, The two first projections 32 a and two second projections 32 b both pass through the limiting holes 211 on the upper end surface of the sleeve cover 21, and the two first projections 32 a also pass through the two through holes 45 of the locking member 41. enter.

After releasing the pressing member 43, referring to FIGS. 16 and 17, the locking ring 42 returns to the original ring shape under the action of its own elastic force, and the shifting blocks 47 on the two second limiting portions 44 b move toward the corresponding shifting grooves 217. The inner end of the shift groove 217 slides, the distance W1 between the outer walls of the two first limiting portions 44a increases, and the distance W2 between the inner walls of the two second limiting portions 44b decreases. Each of the bumps 32 is engaged with the corresponding stopper 44, and the lower end surface of the sealing seat 12 is closely attached to the upper end surface of the sleeve cover 21. The distance between the inner walls of the two first bumps 32a is D1, and the distance between the outer walls of the two second bumps 32b is D2. In the engaged state, D1 <W1, D2> W2. The two first limiting portions 44a on the locking ring 42 are respectively located in the "L" -shaped bayonet formed by the two first bumps 32a; the two second limiting portions 44b on the locking ring 42 are respectively located on two second The "L" -shaped bayonet formed by the bump 32b.

The four projections 32 and the four stoppers 44 form the four engagement points of the locking mechanism 30. The four engagement points are evenly arranged between the conversion cap 10 and the casing bin 20 to ensure that The stable connection between them enhances the sealing between the conversion cap 10 and the casing 20.

When the tissue sample to be taken out is relatively large, the assembled puncture housing of this embodiment is disassembled to facilitate the removal of the tissue sample and reduce the damage of the tissue sample during the removal process. When there is no puncture core rod or surgical instrument in the disassembled puncture device, the first seal in the casing 20 is mainly used for sealing. Referring to FIG. 18 and FIG. 19, when disassembling the assembled puncture device housing of this embodiment, press the two pressing members 43 on both sides of the lock ring 42 again, and the pressing direction is toward the central axis of the casing 20. During the pressing process, The shifting blocks 47 on the two second limiting portions 44 b slide toward the outer ends of the shifting grooves 217 in the corresponding shifting grooves 217 again. The locking ring 42 is elastically deformed in the radial plane of the casing 20 to become The elliptical shape, during the elastic deformation process, the central axis of the locking member 41 and the central axis of the casing bin 20 always keep coincide. The distance W1 between the outer walls of the two first limiting portions 44a decreases, and the distance W2 between the inner walls of the two second limiting portions 44b increases. When D1> W1 and D2 <W2, the two first bumps 32a Disengage the two first limiting portions 44a, two second bumps 32b from the two second limiting portions 44b, and each of the bumps 32 is removed from the through hole 45 and the limiting hole 211, so that the conversion cap 10 can be removed from The casing casing 20 is removed to realize the removal of the puncture housing in this embodiment.

It should be noted that, since the lock mechanism 30 in this embodiment omits components such as springs, it has fewer components and thus has a simple structure. That is, the simple structure is not limited to the fact that the locking member 41 must be an integrated structure.

Example three

The external shape of the trocar shell in this embodiment is shown in FIG. 11.

Referring to FIG. 20 and FIG. 21, the fitting piece 31 is four protrusions 32 provided on the lower end surface of the sealing seat 12. Specifically, of the four protrusions 32, two are the first protrusions 32a, two are the second protrusions 32b, and the two first protrusions 32a are symmetrically arranged along a radial direction of the lower end face of the sealing seat 12, that is, two The two first bumps 32a are located approximately at both ends of the one diameter, and the two second bumps 32b are symmetrically arranged along the other radial direction of the lower end face of the sealing seat 12, that is, the two second bumps 32b are located approximately at Describe the ends of another diameter. The four bumps 32 are uniformly arranged along the lower end annular surface of the sealing seat 12, that is, the connection line of the two first bumps 32 a and the connection line of the two second bumps 32 b are perpendicular to each other. In order to simplify the structure of the bumps 32, each of the bumps 32 is of the same "L" shape and includes a first extension portion 321 and a second extension portion 322. The first extension portion 321 extends along the axial direction of the seal seat 12. The two extension portions 322 and the first extension portion 321 are perpendicular to each other. One end of the first extension portion 321 is disposed on a lower end surface of the sealing seat 12, and the second extension portion 322 is located at the other end of the first extension portion 321. The second extension portion 322 of the first protrusion 32a extends toward the center axis of the seal seat 12, so that the L-shaped bayonet of the first protrusion 32a faces the center axis of the conversion cap 10; the second extension portion of the second protrusion 32b 322 extends in a direction away from the central axis of the seal seat 12, so that the L-shaped bayonet of the second protrusion 32 b faces in a direction away from the central axis of the seal seat 12.

A part of the locking member 41 is disposed in the cavity of the casing box 20 and the locking member 41 can be pivoted in a plane perpendicular to the axial direction of the casing box 20 for engaging the projection 32; further, the casing cover The bottom surface of 21 and / or the top surface of the sleeve seat 22 are provided with a groove for receiving the locking member 41.

Referring to FIGS. 20 and 23, the locking member 41 in this embodiment is a split type and includes a first locking member 51 and a second locking member 52. The structures of the first locking member 51 and the second locking member 52 are the same. . Specifically, referring to FIG. 22, the first locking member 51 includes a pivot shaft 55, a first swing arm 53, a second swing arm 54, and a pressing member 43. The pivot shaft 55 is disposed on the first swing arm 53 and the second swing arm 54. In between, the first swing arm 53 and the second swing arm 54 form an arc or a chamfer at the pivot axis 55. The first swing arm 53 and the second swing arm 54 pivot about a pivot axis 55. The pressing member 43 is disposed at an end of the first rotating arm 53 away from the pivot shaft 55. The pressing member 43 includes a pressing portion 431, which is formed in a square shape and includes a first limiting portion 44a and a through hole 45 penetrating vertically. For the first bump 32a to pass through. The first restricting portion 44 a is formed at a position of the pressing portion 431 near the one end of the first arm 53. The through hole 45 is adjacent to the first restricting portion 44 a. The bottom surface of the first restricting portion 44 a is higher than that of the first arm 53. Underside. A second limit portion 44 b is provided at an end of the second swing arm 54 remote from the pivot shaft 55. A bottom surface of the second limit portion 44 b is higher than a bottom surface of the second swing arm 54. “Higher” means that the top surface of the first position-limiting portion 44a is flush with the top surface of the pressing portion 431 and the first arm 53, and the top surface of the second position-limiting portion 44b and the top of the second arm 54 The plane is flush. The vertical distance from the bottom surface to the top surface of the first stopper 44a is smaller than the vertical distance from the bottom surface to the top surface of the pressing portion 431 and the first arm 53, and the vertical distance from the bottom face to the top surface of the second stopper 44b is shorter than The vertical distance from the bottom surface to the top surface of the two-rotation arm 54. The first limiting portion 44 a and the second limiting portion 44 b are respectively matched with the L-shaped bayonet of each of the bumps 32.

The first end of the first swing arm 53 and the first end of the second swing arm 54 are both fixedly connected or integrally formed with the pivot shaft 55, and the first swing arm 53 and the second swing arm 54 form an arc at the pivot shaft 55 Or a corner, both the second end of the first swing arm 53 and the second end of the second swing arm 54 can be rotated about the pivot axis 55. The second end of the first swing arm 53 is provided with a pressing member 43, the pressing member 43 includes The pressing portion 431 and the first stopper 44a, one end of the first stopper 44a is fixedly connected to the second end of the first arm 53, and the bottom surface of the first stopper 44a is higher than the bottom surface of the first arm 53. The pressing portion 431 is U-shaped. Both sides of the pressing portion 431 are connected to the first limiting portion 44a, and the pressing portion 431 and the first limiting portion 44a form a through hole 45 penetrating up and down for the first bump 32a. Through. A second limit portion 44b is provided on the second end of the second swing arm 54. One end of the second limit portion 44b is fixedly connected to the second end of the second swing arm 54. The bottom surface of the second limit portion 44b is higher than The bottom surface of the second swing arm 54. "Higher" here means that the top surface of the first limit portion 44a or the second limit portion 44b is flush with the top surface of the other ring wall, and the first limit portion 44a or the second limit portion 44b The vertical distance from the bottom surface to the top surface is smaller than the vertical distance from the bottom surface to the top surface of other ring walls.

Referring to FIG. 23, in order to more clearly describe the structure after fitting, relative to FIG. 11 and FIG. 20, FIG. 23, FIG. 25, and FIG. 27 are top views of the structure after being rotated by 180 degrees, and FIG. 24 is a schematic perspective view of FIG. 26 is a schematic perspective view of FIG. 27. In order to describe the unification of the manner before and after, the description of the up-and-down positional relationship between the components in FIGS. 23 to 27 still follows the up-and-down positional relationship shown in FIGS. 11 and 20. The sleeve cover 21 has a ring shape and includes a ring-shaped end surface 212, a cover inner shell 213, and a cover shell 214. The ring-shaped end face 212 is provided with four limiting holes 211 for the protrusion 32 to pass through. The annular end surface 212 is evenly disposed. The inner case 213, the annular end surface 212, and the lid case 214 form an annular groove 215 for receiving the locking member 41. The first locking member 51 and the second locking member 52 are symmetrically disposed in the center of the annular groove 215. Although according to a preferred embodiment, the symmetrical centers of the first locking member 51 and the second locking member 52 are axially aligned with the central axis of the sleeve seat 21, it is advantageous for the first locking member 51 and the second locking member 52 to The positioning in the casing bin 20 is also beneficial to the position of the locking member 41 corresponding to the projection 32, which is convenient for engagement. Specifically, the pivot shaft 55 in the first locking member 51 and the second locking member 52 is rotatably disposed on the annular end surface, and the two first rotating arms 53 and the two second rotating arms 54 are both connected to the annular end surface 212. In parallel, the two first limiting portions 44a and the two second limiting portions 44b correspond to the four limiting holes 211 one by one, and the two pressing portions 431 partially protrude from the cover housing 214 for convenient pressing operation. The first locking member 51 and the second locking member 52 can perform a pivoting movement in the annular groove 215, and the pivot point is a pivot shaft 55. When the first locking member 51 pivots around the pivot shaft 55 in the first direction, one end of the first swing arm 53 moves toward the inner case 213 about the pivot shaft 55, and one end of the second swing arm 54 faces about the pivot shaft 55. The cover case 214 moves. When the first locking member 51 pivots around the pivot shaft 55 in the second direction, one end of the first swing arm 53 moves toward the cover housing 214 about the pivot shaft 55 and one end of the second swing arm 54 about the pivot shaft 55 Move toward the lid inner shell 213. The first direction is opposite to the second direction. When the first direction is clockwise, the second direction is counterclockwise, and vice versa.

In addition, referring to FIG. 22 and FIG. 23 again, the locking member 41 further includes two elastic members 46, which are respectively disposed between the first locking member 51 and the casing 20 and the second locking member 52. And the casing 20. The first locking member 51 and the second locking member 52 are in the first position in the initial state, and are pivoted by the external force against the resistance caused by the deformation of the elastic member 46, and are in the second position after pivoting, and Return to the first position after removing the force. The two elastic members 46 are preferably two torsion springs. The annular end surface 212 of the sleeve cover 21 is provided with two protrusions, and the coils of the two torsion springs are respectively set on the two protrusions, and each torsion spring Relative to the position of the corresponding protrusion, one end of the torsion spring is in contact with the cover housing 214, and the other end of the torsion spring is in contact with the second spiral arm 54.

In the initial state, the locking member 41 is located in the first position, and the two first limiting portions 44 a and the two second limiting portions 44 b correspond to the four limiting holes 211 on the annular end surface 212 one by one. When the conversion cap 10 and the casing 20 are assembled, two fingers are used to press the pressing portions 431 of the first locking member 51 and the second locking member 52 respectively, and the two pressing portions 431 are directed toward the central axis of the casing 20 Pushing in the direction, the locking member 41 moves in the radial plane of the sleeve cover 21, and at this time, the first locking member 51 and the second locking member 52 each rotate around the corresponding pivot axis 55 in the first direction, that is, two Each pressing portion 431 includes two first limiting portions 44 a rotating toward the cover inner shell 213, and two second rotating arms 54 respectively drive the two second limiting portions 44 b toward the cover housing 214, and at the same time the second rotating arms 54 Pressing one end of the torsion spring torsion the torsion spring, the distance between the two first limiting portions 44a decreases, the distance between the two second limiting portions 44b increases, and the two first limiting portions 44a and two Each of the second limiting portions 44 b is deviated from the four limiting holes 211 on the annular end surface 212, and the locking member 41 is located at the second position to make room for the protrusion 32 to enter. The two first bumps 32a correspond to the two first limiting portions 44a, and the two second bumps 32b correspond to the two second limiting portions 44b. The central axes of the conversion cap 10 and the casing bin 20 are in the axial direction. In alignment, both the first protrusion 32 a and the second protrusion 32 b pass through the limiting holes 211 on the upper end surface of the sleeve cover 21, and the two first protrusions 32 a continue through the two through holes 45 formed by the pressing member 43.

With reference to FIGS. 24 and 25, when the pressing member 43 is released, the first locking member 51 and the second locking member 52 are respectively wound around the corresponding pivot axis 55 along the second pivot axis under the elastic force of the torsion spring of the elastic member 46 due to torsion. When the direction is rotated, the locking member 41 returns to the first position. The distance between the outer walls of the two first limiting portions 44a increases, and at the same time, the distance between the inner walls of the two second limiting portions 44b decreases. Each of the bumps 32 engages with the corresponding limiting pieces. The lower end surface is in close contact with the upper end surface of the sleeve cover 21. In the engaged state, the distance between the inner walls of the two first bumps 32a is smaller than the distance between the outer walls of the two first limiting portions 44a, and the distance between the outer walls of the two second bumps 32b is greater than the two second limiting portions 44b. The distance between the inner walls. The two first limiting portions 44a are respectively located in the "L" type bayonet formed by the two first bumps 32a, and the two second limiting portions 44b are respectively located in the "L" shape formed by the two second bumps 32b. Bayonet.

The four protrusions 32 and the two first limiting portions 44 a and the two second limiting portions 44 b form four engaging points of the locking mechanism 30, and the four engaging points are evenly disposed between the conversion cap 10 and the casing bin 20. To ensure a stable connection between the conversion cap 10 and the casing 20.

Referring to FIG. 26 and FIG. 27, when disassembling the puncture device housing assembled in this embodiment, the operator uses two fingers to press the pressing member 43 on the first locking member 51 and the second locking member 52, respectively, with the pressing direction facing In the direction of the central axis of the casing 20, during the pressing process, the first locking member 51 and the second locking member 52 are each pivoted in the first direction about the corresponding pivot axis 55. The two pressing members 43 include two first limiting portions 44a moving toward the cover inner shell 213, and two second rotating arms 54 respectively drive the two second limiting portions 44b toward the cover housing 214 and simultaneously the second rotating arms 54 The torsion spring is twisted, the distance between the two first limiting portions 44a gradually decreases, the distance between the two second limiting portions 44b gradually increases, and when the distance between the outer walls of the two first limiting portions 44a gradually increases When the distance between the inner walls of the two first bumps 32a is smaller than the distance between the inner walls of the two second limiting portions 44b is greater than the distance between the outer walls of the two second bumps 32b, the two first bumps 32a and the two first bumps 32a A limiting portion 44a is disengaged, the two second projections 32b are separated from the two second limiting portions 44b, and the locking member 41 is located at the second position. At this time, the two first limiting portions 44a and the two second limiting portions 44b are deviated from the four limiting holes 211 on the annular end surface 212 to make room for the protrusion 32 to exit. Each of the bumps 32 is removed from the through hole 45 and the limiting hole 211, so that the conversion cap 10 can be removed from the casing bin 20, and the puncture device shell can be disassembled in this embodiment.

The locking mechanisms 30 in the present invention all use a pressing operation mode to make the locking member 41 move in the radial plane of the casing bin 20, thereby achieving the engagement and disengagement between the conversion cap 10 and the casing bin 20, thereby avoiding Rotary locking mechanisms are prone to jamming defects.

Finally, the present invention also provides a puncture device including the above-mentioned puncture housing.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. Those skilled in the art can interpret the above within the scope of the invention Embodiments are subject to change, modification, substitution, and modification.

Claims (25)

1. A puncture housing includes a first housing component, a second housing component, and a locking mechanism for selectively connecting the first housing component and the second housing component;

   The locking mechanism includes a locking member and a matching member; the locking member is provided on the second housing member, and the matching member is provided on the first housing member;

   Under the action of the elastic force of the elastic member, the locking member is engaged with the mating member; the locking member moves under the action of the elastic force to overcome the elastic force, so that the locking member is disengaged from the mating member; the card Combining and disengaging to realize the selective connection of the first shell component and the second shell component; the movement includes one or a combination of two or more of translation, elastic deformation, and pivoting;

   The fitting piece includes a protrusion provided on the first housing component; the locking piece includes a limiting portion; the limiting portion engages with the protrusion under the elastic force, and the movement causes the The limiting portion is disengaged from the convex block; the engagement realizes the engagement of the locking member and the mating member, and the disengaging realizes the disengagement of the locking member from the mating member;

   The pivoting pivot shaft is disposed on the second housing component, and the elastic member is disposed between the limiting portion and the pivot shaft.
2. The trocar housing according to claim 1, wherein the locking member comprises a locking ring and a pressing member; and the locking ring is in an axial direction perpendicular to the second housing member under the action of the pressing member. Direction.
3. The housing of the puncture device according to claim 2, wherein the lock ring is moved to an initial position in a direction perpendicular to the axial direction of the second housing part by the elastic force of the elastic member, so that the lock can be locked. The ring is engaged with the matching piece.
4. The housing of the puncture device according to claim 3, wherein the elastic member is a spring, a first stopper is provided on the lock ring, and a second stopper is provided on the second housing part, so that The spring is disposed between the first stop and the second stop.
5. The puncture device housing according to claim 3, wherein the locking ring comprises at least one stopper, and the pressing member is disposed outside the lock ring and is adjacent to one of the stoppers Set

   The mating member is at least one protrusion provided on a lower end surface of the first housing component, and the protrusion is selectively engaged or disengaged from the stopper.
6. The housing of the puncture device according to claim 5, wherein the at least one stopper comprises two first stoppers symmetrically disposed along a radial direction of the locking ring;

   The at least one bump includes two first bumps that are symmetrically arranged along a radial direction of the first housing part, and the two first bumps correspond to the two first limiting portions one to one respectively. Selective engagement or disengagement.
7. The housing of the puncture device according to claim 6, wherein the at least one stopper further comprises two second stoppers disposed symmetrically along another radial direction of the lock ring, and the other diameter Perpendicular to the radial direction;

   The projection includes two second projections symmetrically arranged along the other radial direction of the first housing part, and the two second projections are respectively selected one-to-one corresponding to the two second limiting portions. Sexual engagement or disengagement.
8. The trocar housing according to claim 1, wherein the locking member comprises a locking ring and a pressing member; and the locking ring is in an axial direction perpendicular to the second housing member under the action of the pressing member. An elastic deformation is caused in the direction of, so that the locking ring is disengaged from the mating member.
9. The trocar housing according to claim 8, wherein the locking ring comprises at least one stopper, and the at least one stopper is formed from a bottom-up depression formed on the bottom of the lock ring. A recess; the pressing member is disposed outside the locking ring at a position where the limiter is located; the mating member is at least one projection provided on a lower end surface of the first housing component, and the at least A projection is selectively engaged with or disengaged from the at least one limiting member.
10. The housing of the puncture device according to claim 9, wherein the limiting member comprises two first limiting portions symmetrically arranged along a radial direction of the locking ring and another diameter along the locking ring The two radial limiting portions arranged symmetrically, the one radial direction and the other radial direction are perpendicular to each other; the pressing members are two, and the pressing members correspond to the first limiting portions one to one Settings.
11. The housing of the puncture device according to claim 9, wherein the projection includes two first projections that are symmetrical along a radial direction of the first casing component and another one that is along the first casing component. The two radially protruding second protrusions are perpendicular to each other; the bayonet of the first protrusion faces the center axis of the first housing part, and the first The bayonet of the two projections faces away from the central axis of the first housing component.
12. The housing of the puncture device according to claim 11, wherein the limiting member comprises two first limiting portions symmetrically arranged along a radial direction of the locking ring and another diameter along the locking ring. The two radial limiting portions arranged symmetrically, the one radial direction and the other radial direction are perpendicular to each other; the pressing members are two, and the pressing members correspond to the first limiting portions one to one Setting; the first bump is engaged or disengaged with the first limiting portion, and the second bump is engaged or disengaged with the second limiting portion.
13. The trocar casing according to claim 10, wherein both side walls of each of the pressing members are disposed on an outer peripheral surface of the lock ring at a position where the corresponding first limiting portion is located, and A through hole is formed between the two side walls of the pressing member and the corresponding first limiting portion.
14. The puncture device housing according to claim 10, wherein a shifting block is provided on an outer peripheral surface of the locking ring above each of the second limiting portions; two are provided on the second housing part The displacement grooves each extend in a direction parallel to the other radial direction, and each of the displacement blocks is at least partially located in a corresponding displacement groove.
15. The trocar housing according to claim 1, wherein the locking member comprises the pivot shaft and a rotary arm, the rotary arm is pivotable about the pivot shaft, and the elastic member is provided on the rotary shaft Between an arm and the pivot axis.
16. The trocar casing 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 is elastic and can generate elastic deformation; the spring includes a pressure Spring and torsion spring.
17. The trocar housing according to claim 15, wherein the locking member includes a first locking member and a second locking member, and the first locking member and the second locking member both include the The pivot axis and the swing arm are described.
18. The trocar casing according to claim 17, wherein the first locking member has the same structure as the second locking member, and the first locking member and the second locking member are opposite to each other. A central axis of the second housing component is symmetrically disposed.
19. The puncture device housing according to claim 15, wherein one end of the spiral arm is provided with a first limit portion, the other end of the spiral arm is provided with a second limit portion, and the first limit And the second limiting portion is engaged or disengaged with the bump.
20. The trocar housing according to claim 15, wherein a pressing member is provided at one end of the spiral arm, the pressing member includes a pressing portion, and the pressing portion includes the first limiting portion and a through hole.
21. The trocar casing according to claim 15, wherein the rotary arm comprises a first rotary arm and a second rotary arm, and the pivot axis is disposed between the first rotary arm and the second rotary arm. Between; the first swing arm and the second swing arm form an arc or a chamfer.
22. The housing of the puncture device according to claim 15, wherein the projection includes a first projection and a second projection, and the bayonet of the first projection is opposite to the bayonet of the second projection; The first protrusion is engaged or disengaged with one end of the spiral arm, and the second protrusion is engaged or disengaged with the other end of the spiral arm.
23. The trocar housing according to any one of claims 1 to 22, wherein the first housing component is a conversion cap, and the conversion cap includes a sealing cap and a sealing seat, the sealing cap and the seal The seats are connected in the axial direction; the projection is disposed on the lower end surface of the sealing seat.
24. The trocar housing according to any one of claims 1 to 22, wherein the second housing component is a casing, the casing comprising a casing cover and a casing seat, and the casing The cover and the sleeve seat are connected in an axial direction, and a limit hole for the mating piece to pass through is opened on an end surface of the sleeve cover; the locking member is located between the sleeve cover and the sleeve seat between.
25. A puncture device, wherein the puncture device comprises the puncture device housing according to any one of claims 1 to 24.

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