CN217285937U - Detachable clip applier - Google Patents

Abstract

The utility model belongs to the technical field of medical instrument, especially, relate to a removable clamp of executing. The utility model discloses, execute the clamp and mostly adopt the integral type structure among the prior art, undetachable, lead to executing the clamp washing, the disinfection is inconvenient, not thorough problem, provide a removable clamp of executing, including pincers handle and the outer tube of connection on pincers handle, be equipped with the push rod in the outer tube, push rod one end is pressed and is established on pincers handle, the other end is connected with the chuck of adjusting the aperture through removing the push rod, still be equipped with direction selection subassembly and locating part on outer tube and the push rod respectively, it can make the locating part slide to the outer tube of direction selection subassembly to rotate push rod to predetermined direction and slip push rod. The utility model provides a execute clamp only through the direction select subassembly and locating part mutually support realize the installation and the dismantlement of push rod promptly, can separate the push rod during washing and disinfection to guarantee cleaning and disinfecting's effect, simple structure, spare part that can dismantle alone is less, convenient assembly.

Description

Detachable clip applier

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a removable clamp of executing.

Background

Clip applier is a commonly used medical device, and is usually applied to surgical operations, such as laparoscopic surgery, where it is necessary to apply clip applier to artery and vein vessels at the surgical site to temporarily block the vessels and prevent excessive bleeding. Most of the clip appliers in the prior art adopt an integrated structure and cannot be disassembled, so that the clip appliers are inconvenient and incomplete to clean and disinfect.

In response to this problem, people have also conducted research and study in long-term production and life practices, for example, chinese utility model patent discloses a detachable laparoscopic clip applier [ application No.: 201520710238.3], the utility model discloses a include that the binding clip passes through the screw to be connected with binding clip connecting piece, the binding clip passes through sliding fit and is connected with the push rod head, push rod head boss and binding clip recess relative slip, the removable swing joint of binding clip connecting piece internal thread and connection nut rear end external screw thread, the push rod head right-hand member passes coupling nut and spring, binding clip connecting piece and coupling nut welded fastening make binding clip, binding clip connecting piece and push rod head constitute and to dismantle the module, the binding clip constitutes general module with the pincers handle.

The utility model discloses a although the utility model provides a detachable execute clamp, its structure is too complicated, and the spare part that can dismantle alone is more, is difficult for the assembly, so still need carry out further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problems and provides a detachable clip applier which is convenient for cleaning and disinfection and has a simple structure.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a detachable clip applier comprises a clip handle and an outer sleeve connected to the clip handle, wherein a push rod is arranged in the outer sleeve, one end of the push rod is pressed on the clip handle, the other end of the push rod is connected with a chuck for adjusting the opening degree through a movable push rod, a direction selection assembly and a limiting part are further arranged on the outer sleeve and the push rod respectively, and the limiting part can slide to the outside of the outer sleeve through the direction selection assembly by rotating the push rod to a preset direction and sliding the push rod.

In the detachable clip applier, the direction selection component comprises a selection tube body fixedly connected to the outer sleeve, one end of the push rod penetrates through the selection tube body and is connected with the chuck, and the inner wall of the selection tube body is provided with a selection groove sunken towards the interior of the selection tube body; the limiting part comprises a limiting lug fixedly connected to the push rod, the cross sectional area of the limiting lug is smaller than that of the selection groove, and the limiting lug can move to a position corresponding to the selection groove by rotating the push rod.

In the detachable clip applier, a tensioning component with adjustable length along the axial lead direction of the push rod is further arranged in the outer sleeve, one end of the tensioning component is fixed in the outer sleeve, and the other end of the tensioning component is pressed on the limiting lug.

In the above removable clip applier, the tensioning assembly comprises a tensioning member pressed on the limiting projection and a connecting member fixed in the outer sleeve, an elastic structure is further arranged between the tensioning member and the connecting member, and the tensioning member can move close to the connecting member by compressing the elastic structure.

In the above detachable clip applier, a side surface of the tensioning member, which is close to the limiting projection, is provided with a first positioning groove and a second positioning groove which are recessed towards the inside of the tensioning member, the rotating push rod can enable the limiting projection to be clamped into the first positioning groove or the second positioning groove, and when the limiting projection is located in the first positioning groove, the limiting projection and the selecting groove are located at corresponding positions.

In the detachable clip applier, the cross section of the limiting lug is circular, the bottom surface of the first positioning groove is arc-shaped, when the limiting lug is positioned in the first positioning groove, the outer surface of the limiting lug is attached to the bottom surface of the first positioning groove, and the bottom surface of the second positioning groove is a plane.

In foretell removable pincers of executing, the pincers handle is including rotating fixed handle and the activity handle of connecting, and the one end of fixed handle is equipped with the pipe external member that inside has the promotion cavity, outer bushing is on the pipe external member, the rotation tie point of activity handle and fixed handle is located outside the promotion cavity and the one end of activity handle extends to in the promotion cavity, push rod one end extends to in the promotion cavity and presses the tip of establishing at the activity handle.

In foretell removable clamp of executing, still be equipped with in the promotion cavity and take place the gliding anticreep subassembly of relative pipe external member, the tip that the push rod extends to in the promotion cavity is pressed and is established on the anticreep subassembly, the activity handle extends to the tip that promotes in the cavity and presses and establish on the anticreep subassembly, and slip anticreep subassembly can make push rod and anticreep subassembly alternate segregation or lock each other.

In foretell removable clamp of executing, the anticreep subassembly includes the anticreep sleeve pipe of sliding connection in the pipe external member, is equipped with reset spring between anticreep sleeve pipe and the pipe external member, and the one end of push rod runs through reset spring and presses and establish in the anticreep sleeve pipe, the one end of activity handle extends to in the anticreep sleeve pipe and presses and establish on the anticreep sleeve pipe, the push rod is located the one end side in the anticreep sleeve pipe and is equipped with the gomphosis groove sunken to the push rod inside, be equipped with the inserts that can inlay the gomphosis groove on the anticreep sleeve pipe, the slip anticreep sleeve pipe can make the inserts deviate from or imbed the gomphosis groove.

In the above detachable clip applier, the pushing cavity includes a locking cavity and a separating cavity which are communicated with each other, the inner diameter of the separating cavity is larger than that of the locking cavity, the sliding anti-drop sleeve enables the insert to be located in the locking cavity or the separating cavity, when the insert is located in the locking cavity, one end of the insert extends to the embedding groove, and when the insert is located in the separating cavity, the insert is located outside the embedding groove.

Compared with the prior art, the utility model has the advantages of:

1. the utility model provides a execute clamp only through the direction select subassembly and locating part mutually support realize the installation and the dismantlement of push rod promptly, can separate the push rod during washing and disinfection to guarantee cleaning and disinfecting's effect, simple structure simultaneously, spare part that can dismantle alone is less, convenient assembly.

2. The utility model discloses be equipped with the tensioning subassembly that the pressure was established on the push rod in the overcoat sleeve pipe, tensioning subassembly provides the tensile force to the push rod and makes the push rod drive chuck be in the state of tightening.

3. The utility model discloses be equipped with the anticreep subassembly that can prevent that the push rod from rotating the problem emergence of deviating from automatically easily behind the predetermined direction to improve the stability of executing the clamp assembly and accomplishing back structure, prevent in transportation or storage process, push rod and execute the separation that the emergence is unexpected between the clamp other structures.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is a sectional view of a portion of the structure of the present invention;

FIG. 4 is a schematic structural view of a part of the structure of the present invention;

FIG. 5 is a schematic view of the construction of the direction selection assembly and the tensioning assembly;

FIG. 6 is a sectional view of a portion of the structure of the present invention;

in the figure: the clamp comprises a clamp handle 1, an outer sleeve 2, a push rod 3, a clamp head 4, a direction selection assembly 5, a tensioning assembly 6, an anti-falling assembly 7, a limiting piece 8, a fixed handle 11, a movable handle 12, a pipe sleeve piece 13, a pushing cavity 14, a locking cavity 15, a separation cavity 16, a selection pipe body 51, a selection groove 52, a tensioning piece 61, a connecting piece 62, an elastic structure 63, a first positioning groove 64, a second positioning groove 65, an anti-falling sleeve 71, a return spring 72, a mosaic groove 73, an insert 74 and a limiting lug 81.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in the combined drawings of figure 1 and figure 2, a detachable clip applier comprises a clip handle 1 and an outer sleeve 2 connected to the clip handle 1, a push rod 3 is arranged in the outer sleeve 2, one end of the push rod 3 is pressed on the clip handle 1, the other end of the push rod is connected with a chuck 4 capable of adjusting the opening degree through a movable push rod 3, the specific structure of the chuck 4 and the connection mode of the chuck 4 and a push rod assembly 3 can be selected, the specific structure commonly used in the prior art can be selected, as long as the effect of changing the opening degree of the chuck 4 through pushing the push rod assembly 3 can be realized, and for example, the specific structure recorded in the utility model patent with the application number of '201020209114.4' can be adopted. The outer sleeve 2 and the push rod 3 are respectively provided with a direction selection component 5 and a limiting component 8, and the limiting component 8 can slide outside the outer sleeve 2 through the direction selection component 5 by rotating the push rod 3 to a preset direction and sliding the push rod 3.

The utility model discloses, during the use, misplace each other between push rod 3 and the predetermined direction, slide push rod 3 can make locating part 8 press to be established on direction selection subassembly 5 like this to prevent that push rod 3 from deviating from outside outer tube 2, when needing to carry out cleaning and disinfecting, rotate push rod 3 to the predetermined direction, slide push rod 3 makes locating part 8 and push rod 3 pass through direction selection subassembly 5 and slide outside outer tube 2, thereby realize dismantling. The event the utility model provides a execute clamp only through the direction select subassembly 5 and locating part 8 mutually support realize the installation and the dismantlement of push rod promptly, can separate push rod 3 during washing and disinfection to guarantee cleaning and disinfection's effect, simple structure simultaneously, spare part that can dismantle alone is less, convenient assembly.

As shown in fig. 5 and 6, the direction selecting assembly 5 includes a selecting pipe body 51 fixedly connected to the outer sleeve 2, one end of the push rod 3 passes through the selecting pipe body 51 and is connected to the chuck 4, and the inner wall of the selecting pipe body 51 is provided with a selecting groove 52 recessed toward the inside of the selecting pipe body 51; the limiting member 8 includes a limiting protrusion 81 fixedly connected to the push rod 3, the cross-sectional area of the limiting protrusion 81 is smaller than the cross-sectional area of the selecting groove 52, and the push rod 3 is rotated to move the limiting protrusion 81 to a position corresponding to the selecting groove 52.

During the use, misplace each other between push rod 3 and the predetermined direction, the position when spacing lug 81 corresponds with selection recess 52 is so-called predetermined direction, slide push rod 3 can make spacing lug 81 press to be established on body 51 like this, thereby prevent that push rod 3 from deviating from outside outer tube 2, when needing to carry out cleaning and disinfection, rotate push rod 3 to predetermined direction, slide push rod 3 this moment, spacing lug 81 can be via selecting recess 52 roll-off, thereby make push rod 3 pass through direction selection subassembly 5 and slide outside outer tube 2, thereby realize dismantling.

Preferably, there are 2 limiting protrusions 81 and 2 selecting grooves 52, and they are uniformly distributed along the axial line direction of the push rod assembly 3. Therefore, the tension applied when the tension assembly 6 is pressed on the limit bump 81 is distributed uniformly.

As shown in fig. 5, a tensioning assembly 6 with adjustable length along the axial lead direction of the push rod 3 is further arranged in the outer sleeve 2, one end of the tensioning assembly 6 is fixed in the outer sleeve 2, and the other end is pressed on the limit bump 81.

Specifically, the tensioning assembly 6 includes a tensioning member 61 pressed on the limit protrusion 81 and a connecting member 62 fixed in the outer sleeve 2, and the connecting member 62 is fixed in the outer sleeve 2 in a fixed connection manner or in an interference fit manner. An elastic structure 63 is further arranged between the tensioning member 61 and the connecting member 62, and the tensioning member 61 can move close to the connecting member 62 by compressing the elastic structure 63. The elastic structure 63 may be a spring or a rubber ring.

As shown in fig. 5, a side surface of the tensioning member 61 close to the limiting protrusion 81 is provided with a first positioning groove 64 and a second positioning groove 65 which are recessed towards the inside of the tensioning member 61, the rotating push rod 3 can make the limiting protrusion 81 be clamped into the first positioning groove 64 or the second positioning groove 65, and when the limiting protrusion 81 is located in the first positioning groove 64, the limiting protrusion 81 and the selecting groove 52 are located at corresponding positions. The cooperation between the first positioning groove 64 and the second positioning groove 65 and the limit projection 81 facilitates the rapid positioning of the push rod 3 during the rotation process.

When the positioning device is used, the push rod 3 is rotated to enable the limiting lug 81 to be clamped into the first positioning groove 64, and the push rod 3 is in a detachable direction at the moment. When the push rod 3 is rotated to make the limit projection 81 be clamped into the second positioning groove 65, the push rod 3 is in the non-detachable direction.

Preferably, the cross section of the limiting bump 81 is circular, the bottom surface of the first positioning groove 64 is arc-shaped, when the limiting bump 81 is located in the first positioning groove 64, the outer surface of the limiting bump 81 is attached to the bottom surface of the first positioning groove 64, and the bottom surface of the second positioning groove 65 is a plane. Therefore, the acting forces of the first positioning groove 64 and the second positioning groove 65 when being mutually clamped with the limiting convex block 81 are different, and the requirements of the rotating push rod 3 in different directions are better met.

Referring to fig. 2-4, the forceps handle 1 includes a fixed handle 11 and a movable handle 12 which are rotatably connected, a tube assembly 13 having a pushing cavity 14 inside is disposed at one end of the fixed handle 11, the outer tube 2 is connected to the tube assembly 13, a rotation connection point of the movable handle 12 and the fixed handle 11 is located outside the pushing cavity 14, one end of the movable handle 12 extends into the pushing cavity 14, one end of the push rod 3 extends into the pushing cavity 14 and is pressed at an end of the movable handle 12, so that the end of the movable handle 12 can move along an axial line direction of the pushing cavity 14 by rotating the movable handle 12 to push the push rod 3 to move.

In use, a user applies pressure to the movable handle 12 to rotate the movable handle 12 relative to the fixed handle 11, thereby pushing the push rod 3 to move in the push cavity 14.

As shown in fig. 2 and 3, an anti-disengaging assembly 7 capable of sliding relative to the tube kit 13 is further arranged in the push cavity 14, the end portion of the push rod 3 extending into the push cavity 14 is pressed on the anti-disengaging assembly 7, the end portion of the movable handle 12 extending into the push cavity 14 is pressed on the anti-disengaging assembly 7, and the sliding anti-disengaging assembly 7 can enable the push rod 3 and the anti-disengaging assembly 7 to be separated from each other or locked with each other. The utility model discloses be equipped with the anticreep subassembly 7 that can prevent that push rod 3 from rotating the problem emergence of deviating from automatically easily behind the predetermined direction to improve the stability of executing the clamp assembly and accomplishing back structure, prevent in transportation or storage process, push rod 3 and execute and clamp the separation that meets accident between other structures.

Specifically, the anti-falling assembly 7 includes an anti-falling sleeve 71 slidably connected in the tube kit 13, a return spring 72 is disposed between the anti-falling sleeve 71 and the tube kit 13, one end of the push rod 3 penetrates through the return spring 72 and is pressed in the anti-falling sleeve 71, one end of the movable handle 12 extends into the anti-falling sleeve 71 and is pressed on the anti-falling sleeve 71, a fitting groove 73 recessed into the push rod 3 is disposed on a side surface of one end of the push rod 3 located in the anti-falling sleeve 71, an insert 74 capable of being fitted into the fitting groove 73 is disposed on the anti-falling sleeve 71, and the insert 74 can be removed from or fitted into the fitting groove 73 by sliding the anti-falling sleeve 71. The insert 74 may be a sphere, a wedge, or other structures with an arc surface or an inclined surface, so as to be inserted into or removed from the fitting groove 73 during the pushing process. The pushing cavity 14 comprises a locking cavity 15 and a separating cavity 16 which are communicated with each other, the inner diameter of the separating cavity 16 is larger than that of the locking cavity 15, the insert 74 can be located in the locking cavity 15 or the separating cavity 16 by sliding the anti-falling sleeve 71, when the insert 74 is located in the locking cavity 15, one end of the insert 74 extends into the embedding groove 73, and when the insert 74 is located in the separating cavity 16, the insert 74 is located outside the embedding groove 73.

When the anti-disengaging push rod is used, the movable handle 12 is rotated to drive the anti-disengaging sleeve 71 to push the push rod 3 to move, when the limiting lug 81 and the selecting groove 52 are staggered with each other, the limiting lug 81 is pressed on the selecting pipe body 51 to prevent the push rod 3 from further moving, and at the moment, the insert 74 is always positioned in the locking cavity 15, so that the push rod 3 is further prevented from being detached and disengaged; when the limiting convex block 81 and the selecting groove 52 are in opposite positions, the limiting convex block 81 enables the push rod 3 to be pushed by the anti-falling sleeve 71 to further move through the selecting groove 52, at the moment, the insert 74 is transferred into the separating cavity 16 from the locking cavity 15, the insert 74 is separated from the embedding groove 73 under the pressure effect, and therefore the push rod 3 can be separated and separated detachably.

The utility model discloses a theory of operation is: when the push rod 3 is dislocated from the predetermined direction, that is, the limiting protrusion 81 and the selecting recess 52 are dislocated from each other, the movable handle 12 is rotated to drive the anti-falling sleeve 71 to push the push rod 3 to move, so that only the chuck 4 is clamped, and the limiting protrusion 81 is pressed on the tube body 51, thereby preventing the push rod 3 from falling out of the outer sleeve 2; when cleaning and disinfection are needed, the push rod 3 is rotated to the preset direction, namely, when the limiting lug 81 and the selection groove 52 are in relative positions, the movable handle 12 is rotated to drive the anti-falling sleeve 71 to push the push rod 3, the limiting lug 81 can slide out through the selection groove 52, so that the push rod 3 passes through the direction selection assembly 5 and slides out of the outer sleeve 2, and disassembly is achieved. If the push rod 3 is rotated to a predetermined direction during transportation or storage, the insert 74 is engaged in the engaging groove 73, so that the push rod 3 is difficult to be automatically released out of the outer sleeve 2 without manually rotating the movable handle 12. The event the utility model provides a execute clamp only selects subassembly 5 through the direction that sets up on outer sleeve pipe 2 to realize the installation and the dismantlement of push rod 3 promptly, can separate push rod 3 during washing and disinfection to guarantee cleaning and disinfecting's effect, simple structure simultaneously, spare part that can dismantle alone is less, convenient assembly.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the forceps handle 1, the outer sleeve 2, the push rod 3, the chuck 4, the direction selection assembly 5, the tensioning assembly 6, the anti-slip assembly 7, the limiting member 8, the fixed handle 11, the movable handle 12, the tube kit 13, the pushing cavity 14, the locking cavity 15, the separating cavity 16, the selection tube body 51, the selection groove 52, the tensioning member 61, the connecting member 62, the elastic structure 63, the first positioning groove 64, the second positioning groove 65, the anti-slip sleeve 71, the return spring 72, the fitting groove 73, the insert 74, the limiting projection 81, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a removable clamp of executing, includes pincers handle (1) and outer tube (2) of connection on pincers handle (1), be equipped with push rod (3) in outer tube (2), push rod (3) one end is pressed and is established on pincers handle (1), and the other end is connected with chuck (4) of adjusting the aperture through removing push rod (3), its characterized in that: the outer sleeve (2) and the push rod (3) are respectively provided with a direction selection assembly (5) and a limiting piece (8), the push rod (3) is rotated to a preset direction, the push rod (3) is slid to enable the limiting piece (8) to slide to the outside of the outer sleeve (2) through the direction selection assembly (5), the chuck (4) is rotatably connected with the movable push rod (3), and the axial lead of the movable push rod (3) is parallel to or coincided with the axial lead of the outer sleeve (2).

2. The detachable clip applier of claim 1, wherein: the direction selection assembly (5) comprises a selection pipe body (51) fixedly connected to the outer sleeve (2), one end of the push rod (3) penetrates through the selection pipe body (51) and is connected with the chuck (4), and a selection groove (52) which is sunken towards the interior of the selection pipe body (51) is formed in the inner wall of the selection pipe body (51); the limiting part (8) comprises a limiting lug (81) fixedly connected to the push rod (3), the cross section area of the limiting lug (81) is smaller than that of the selection groove (52), and the limiting lug (81) can be moved to a position corresponding to the selection groove (52) by rotating the push rod (3).

3. The detachable clip applier of claim 2, wherein: the length of the tensioning component (6) which can be adjusted along the axial lead direction of the push rod (3) is further arranged in the outer sleeve (2), one end of the tensioning component (6) is fixed in the outer sleeve (2), and the other end of the tensioning component is pressed on the limiting convex block (81).

4. The detachable clip applier of claim 3, wherein: tensioning subassembly (6) are including pressing tensioning member (61) of establishing on spacing lug (81) and fixing connecting piece (62) in outer tube (2), still be equipped with elastic construction (63) between tensioning member (61) and connecting piece (62), compression elastic construction (63) can make tensioning member (61) take place to be close to the removal of connecting piece (62).

5. The detachable clip applier of claim 4, wherein: one side surface that tensioning piece (61) is close to spacing lug (81) has first positioning groove (64) and second positioning groove (65) to tensioning piece (61) inside sunken, rotates push rod (3) and can make spacing lug (81) block go into in first positioning groove (64) or second positioning groove (65), when spacing lug (81) are located first positioning groove (64), spacing lug (81) are in corresponding the position with selecting recess (52).

6. The detachable clip applier of claim 5, wherein: the cross section of the limiting convex block (81) is circular, the bottom surface of the first positioning groove (64) is arc-shaped, when the limiting convex block (81) is positioned in the first positioning groove (64), the outer surface of the limiting convex block (81) is attached to the bottom surface of the first positioning groove (64), and the bottom surface of the second positioning groove (65) is a plane.

7. The detachable clip applier of claim 1, wherein: pincers handle (1) is including rotating fixed handle (11) and the activity handle (12) of connecting, and the one end of fixed handle (11) is equipped with inside pipe external member (13) that have promotion cavity (14), outer tube (2) are connected on pipe external member (13), the rotation tie point of activity handle (12) and fixed handle (11) is located the one end that promotes cavity (14) outer and activity handle (12) and extends to in promoting cavity (14), push rod (3) one end extends to in promoting cavity (14) and presses the tip of establishing at activity handle (12).

8. The detachable clip applier of claim 7, wherein: promote still to be equipped with in cavity (14) and to take place gliding anticreep subassembly (7) of relative pipe external member (13), push rod (3) extend to the tip pressure that promotes in cavity (14) and establish on anticreep subassembly (7), activity handle (12) extend to the tip pressure that promotes in cavity (14) and establish on anticreep subassembly (7), slip anticreep subassembly (7) can make push rod (3) and anticreep subassembly (7) alternate segregation or lock each other.

9. The detachable clip applier of claim 8, wherein: the anti-falling assembly (7) comprises an anti-falling sleeve (71) which is connected in a pipe kit (13) in a sliding mode, a reset spring (72) is arranged between the anti-falling sleeve (71) and the pipe kit (13), one end of a push rod (3) penetrates through the reset spring (72) and is pressed in the anti-falling sleeve (71), one end of a movable handle (12) extends into the anti-falling sleeve (71) and is pressed on the anti-falling sleeve (71), one end side face, located in the anti-falling sleeve (71), of the push rod (3) is provided with an embedded groove (73) which is sunken in the push rod (3), an embedded piece (74) capable of being embedded into the embedded groove (73) is arranged on the anti-falling sleeve (71), and the anti-falling sleeve (71) can enable the embedded piece (74) to be separated from or embedded into the embedded groove (73).

10. The detachable clip applier of claim 9, wherein: the push cavity (14) comprises a locking cavity (15) and a separation cavity (16) which are communicated with each other, the inner diameter of the separation cavity (16) is larger than that of the locking cavity (15), the insert (74) can be located in the locking cavity (15) or the separation cavity (16) through the sliding anti-falling sleeve (71), when the insert (74) is located in the locking cavity (15), one end of the insert (74) extends into the embedding groove (73), and when the insert (74) is located in the separation cavity (16), the insert (74) is located outside the embedding groove (73).

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