Clip applier cartridge shaft drive method and clip applier

Abstract

The application belongs to the technical field of medical devices, and particularly relates to a clip cartridge shaft driving method and a clip applier. The driving shaft of the applier and the clip cartridge shaft located at the initial position of the proximal end of the clip cartridge shaft form a separable connection under the action of an axial external force. The driving shaft pushes the clip cartridge shaft to move from the initial position of the proximal end of the clip cartridge shaft to the terminal position of the distal end of the clip cartridge shaft. After the clip cartridge shaft leaves the initial position of the proximal end of the clip cartridge shaft, the driving shaft and the clip cartridge shaft are locked and kept in the locked state. The driving shaft drives the clip cartridge shaft to move from the terminal position of the distal end of the clip cartridge shaft towards the proximal end until the clip cartridge shaft is pulled back to the initial position of the proximal end of the clip cartridge shaft, and the driving shaft and the clip cartridge shaft become a separable connection under the action of an axial external force. The pulling back effect is stable and reliable, and the problem that the clip cartridge shaft cannot be fired again due to the failure of the clip cartridge shaft to reset is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a clip cartridge shaft driving method of a clip applier and the clip applier. BACKGROUND

[0002] Surgical clip appliers are generally used to occlude tubular tissue during surgery to avoid liquid leakage in the tubular tissue.

[0003] Generally, the clip applier includes a clip cartridge assembly and an adapter, wherein the clip cartridge assembly is in plug-in connection with the adapter, and when the two are plugged together, the clip cartridge shaft of the clip cartridge assembly is in abutment with the driving shaft of the adapter. The clip cartridge shaft needs to be moved towards the distal end under the push of the driving shaft to send a clip towards the clip jaw and close the clip jaw after the clip is sent to fire the clip. After firing, since the clip cartridge shaft is in abutment with the driving shaft, the reset of the clip cartridge shaft towards the proximal end can only rely on the reset force of the spring, which may cause reset failure, and thus the clip jaw cannot return to the open state and cannot be fired again. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In order to solve the above problems in the prior art, the present application provides a clip cartridge shaft driving method of a clip applier and the clip applier, which can reliably drive the reset of the clip cartridge shaft.

[0006] (II) Technical scheme

[0007] In order to achieve the above-mentioned purposes, the main technical scheme adopted by the present application includes:

[0008] The present application provides a clip cartridge shaft driving method of a clip applier, which includes a clip cartridge shaft advancing step and a clip cartridge shaft pulling back step: the clip cartridge shaft advancing step includes: S11, the driving shaft of the applicator and the clip cartridge shaft located at the proximal end initial position of the clip cartridge shaft form a separable connection under the action of an axial external force; S12, the driving shaft drives the clip cartridge shaft to move from the proximal end initial position of the clip cartridge shaft to the distal end terminal position of the clip cartridge shaft, and after the clip cartridge shaft leaves the proximal end initial position of the clip cartridge shaft, the driving shaft and the clip cartridge shaft are locked and remain in the locked state; the clip cartridge shaft pulling back step: S21, the driving shaft drives the clip cartridge shaft to move towards the proximal end direction, and when the clip cartridge shaft is pulled back to the proximal end initial position of the clip cartridge shaft, the driving shaft and the clip cartridge shaft become a separable connection under the action of an axial external force.

[0009] Preferably, in step S11: when the clip cartridge assembly and the adapter of the applicator are connected, the driving shaft is axially spaced apart from the clip cartridge shaft located at the proximal end initial position of the clip cartridge shaft; the driving shaft moves towards the distal end direction until it forms a separable connection with the clip cartridge shaft located at the proximal end initial position of the clip cartridge shaft under the action of an axial external force; the clip cartridge shaft pulling back step further includes: S22, the driving shaft continues to move towards the proximal end direction and separates from the clip cartridge shaft.

[0010] In another aspect, the present application provides a clip applier comprising an adapter and a clip cartridge assembly detachably connected together, the clip cartridge assembly comprising a clip cartridge shaft movable between a proximal initial position of the clip cartridge shaft and a distal terminal position of the clip cartridge shaft; the adapter comprising a drive shaft located proximally of the clip cartridge shaft; the clip cartridge shaft forms a detachable connection with the drive shaft under axial external force when the clip cartridge shaft is located at the proximal initial position of the clip cartridge shaft; the clip cartridge shaft is locked with the drive shaft when the clip cartridge shaft is located at the distal terminal position of the clip cartridge shaft and positions between the proximal initial position of the clip cartridge shaft and the distal terminal position of the clip cartridge shaft.

[0011] Preferably, the drive shaft is movable between a proximal initial position of the drive shaft, a connection position of the drive shaft and a distal terminal position of the drive shaft arranged from proximal to distal; the drive shaft is axially spaced apart from the clip cartridge shaft located at the proximal initial position of the clip cartridge shaft when the drive shaft is located at the proximal initial position of the drive shaft; the drive shaft forms a detachable connection with the clip cartridge shaft located at the proximal initial position of the clip cartridge shaft under axial external force when the drive shaft is located at the connection position of the drive shaft; the clip cartridge shaft is located at the distal terminal position of the clip cartridge shaft when the drive shaft is located at the distal terminal position of the drive shaft.

[0012] Preferably, the adapter comprises a driving mechanism connected with the drive shaft for driving the drive shaft to move axially and rotate, the locking of the drive shaft with the clip cartridge shaft is a locking of the drive shaft and the clip cartridge shaft to move axially and rotate simultaneously.

[0013] Preferably, the clip cartridge shaft is provided with a first locking structure; the drive shaft is provided with a second locking structure; the clip cartridge assembly is provided with a locking control structure; the locking control structure cooperates with the first locking structure and the second locking structure: the clip cartridge shaft forms a detachable connection with the drive shaft under axial external force when the clip cartridge shaft is located at the proximal initial position of the clip cartridge shaft; the clip cartridge shaft is locked with the drive shaft when the clip cartridge shaft is located at the distal terminal position of the clip cartridge shaft and positions between the proximal initial position of the clip cartridge shaft and the distal terminal position of the clip cartridge shaft.

[0014] Preferably, the first locking structure comprises an axial insertion hole provided at the proximal end of the clip cartridge shaft, the axial insertion hole is inserted with the distal end of the drive shaft; the locking control structure comprises a release surface and a limiting surface located outside the clip cartridge shaft; the release surface is spaced apart from the clip cartridge shaft when the clip cartridge shaft is located at the proximal initial position of the clip cartridge shaft, allowing the axial insertion hole to be disengaged from the distal end of the drive shaft; the limiting surface prevents the axial insertion hole from being disengaged from the distal end of the drive shaft when the clip cartridge shaft is located at the distal terminal position of the clip cartridge shaft and positions between the proximal initial position of the clip cartridge shaft and the distal terminal position of the clip cartridge shaft.

[0015] Preferably, the first locking structure further comprises a clamping piece which is transversely movably inserted into the axial insertion hole; the spacing distance between the releasing surface and the clamping-warehouse shaft in the initial position of the proximal end of the clamping-warehouse shaft is set to enable the clamping piece to move out of the axial insertion hole; the limiting surface limits the clamping piece to be inserted into the axial insertion hole and the distal end of the clamping-drive shaft in the terminal position of the distal end of the clamping-warehouse shaft and the initial position of the proximal end of the clamping-warehouse shaft and the position between the initial position of the proximal end of the clamping-warehouse shaft and the terminal position of the distal end of the clamping-warehouse shaft.

[0016] Preferably, the clamping piece comprises a plurality of groups of locking beads distributed around the axis of the clamping-warehouse shaft, each group of locking beads comprises one locking bead or a plurality of locking beads arranged in a transverse direction, the hole on the clamping-warehouse shaft for accommodating the locking beads is a transverse taper hole, the small end of the transverse taper hole communicates with the axial insertion hole, and the locking beads can partially pass out of the small end of the taper hole; the second locking structure is a plurality of locking grooves provided on the distal end of the drive shaft one-to-one corresponding to the plurality of groups of locking beads, the locking beads are partially inserted into the locking grooves under the action of the limiting surface, and locking with the locking grooves is formed.

[0017] Preferably, the clamping-warehouse assembly further comprises a tube body, a clamping pushing mechanism, a firing mechanism, a first reset member and a second reset member, the clamping-warehouse shaft, the clamping pushing mechanism and the firing mechanism are at least partially located in the tube body; in the process of moving the clamping-warehouse shaft from the initial position of the proximal end of the clamping-warehouse shaft to the terminal position of the distal end of the clamping-warehouse shaft, the clamping pushing mechanism is first driven to move towards the distal end, and then the firing mechanism is driven to move towards the distal end; the first reset member is arranged between the clamping pushing mechanism and the clamping-warehouse shaft, stores energy in the process of moving the clamping-warehouse shaft from the initial position of the proximal end of the clamping-warehouse shaft to the terminal position of the distal end of the clamping-warehouse shaft, and drives the clamping pushing mechanism to reset in the process of moving the clamping-warehouse shaft from the terminal position of the distal end of the clamping-warehouse shaft to the initial position of the proximal end of the clamping-warehouse shaft; the second reset member is arranged between the firing mechanism and the tube body or the clamping-warehouse shaft, stores energy in the process of moving the clamping-warehouse shaft from the initial position of the proximal end of the clamping-warehouse shaft to the terminal position of the distal end of the clamping-warehouse shaft, and drives the firing mechanism to reset in the process of moving the clamping-warehouse shaft from the terminal position of the distal end of the clamping-warehouse shaft to the initial position of the proximal end of the clamping-warehouse shaft.

[0018] (Three) beneficial effects

[0019] The beneficial effects of the present application are:

[0020] The clamping device and clamping shaft driving method provided by this invention, along with the clamping device itself, offer several advantages. Firstly, at the initial position near the proximal end of the clamping shaft, the clamping shaft and drive shaft form a separable connection under axial external force, facilitating the insertion and removal of the clamping assembly and adapter. Secondly, at positions other than the initial position near the proximal end of the clamping shaft, the clamping shaft and drive shaft are locked. Thus, when the clamping shaft needs to return from its distal end position to its initial position near the proximal end, the movement of the drive shaft towards the proximal end directly pulls the clamping shaft back to its initial position. This pull-back is stable and reliable, avoiding the problem of being unable to fire again due to the clamping shaft's inability to reset. Simultaneously, at positions other than the initial position, because the clamping shaft and drive shaft are locked, the clamping assembly and adapter are also locked, preventing the clamping assembly from being removed, thus protecting the stability of the mechanism's operation and the user's safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the clamping device provided in Embodiment 1;

[0022] Figure 2 for Figure 1 A schematic diagram of the cross-section of the clamping device;

[0023] Figure 3 for Figure 1 A partial cross-sectional schematic diagram of the clamping device shows the clamping shaft in its initial position near the end of the clamping shaft and the drive shaft in its initial position near the end of the drive shaft.

[0024] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the clamping device shows the clamping shaft at a position between the initial position of the proximal end of the clamping shaft and the termination position of the distal end, and the drive shaft at a position between the connection position and the termination position.

[0025] Figure 5 for Figure 1 A schematic diagram of the clamping chamber assembly in the clamp applicator;

[0026] Figure 6 for Figure 1 A schematic diagram of one end face of the adapter in the applicator;

[0027] Figure 7 It shows Figure 1 A replacement for the connection structure between the clamping shaft and the drive shaft in the applicator;

[0028] Figure 8 It shows Figure 1 Another alternative to the connection structure of the clamping shaft and drive shaft in the applicator.

[0029] [Explanation of Labels in the Attached Image]

[0030] 1: Adapter; 11: Drive shaft; 12: Second locking structure; 13: Guide part; 14: Slot;

[0031] 2: Clamping assembly; 21: Clamping shaft; 22: Axial insertion hole; 23: Snap-fit ​​component; 24: Release surface; 25: Lateral conical hole; 26: Limiting surface; 27: First reset component; 28: Reset component; 29: Push clamping mechanism; 210: Second reset component; 211: Tube body; 212: Snap-fit ​​component; 213: Expansion sleeve; 214: Snap hole; 215: Flexible snap fastener; 216: Ball head;

[0032] 3: Clamping pliers. Detailed Implementation

[0033] To better explain and facilitate understanding of this invention, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In this document, "near" and "far" are defined as follows: when used, the direction from the doctor pointing to the patient is the direction from near to far.

[0034] Example 1

[0035] like Figures 1-6 As shown, this embodiment provides a clamp applicator, which includes an adapter 1 and a clamping assembly 2 that are detachably plugged together.

[0036] The clamping assembly 2 includes a clamping shaft 21 and a tube 211. The tube 211 can be the outer shell of the proximal end of the clamping assembly 2, or it can be a component inside the proximal outer shell of the clamping assembly 2. The tube 211 itself can be a single piece or a separate piece. One of the functions of the tube 211 is to provide a limiting structure on its inner wall to limit the movement position of the moving parts. In the prior art, the proximal end of the clamping shaft 21 is inserted into the tube 211, and a reset member 28, such as a spring, is provided between the clamping shaft 21 and the tube 211. In this embodiment, the reset member 28 is retained to provide auxiliary reset force, but in other embodiments, the reset member 28 and the structure that cooperates with the reset member 28 can be omitted to simplify the product structure.

[0037] When the adapter 1 and the clamping assembly 2 are first inserted, the clamping shaft 21 is located at its initial proximal position. This initial proximal position can be defined as the limit position of the clamping shaft 21 on the proximal side by forming a blocking portion in the tube body 211, but it may not be the limit position on the proximal side, but simply the position of the clamping shaft 21 in its natural state when the adapter 1 and the clamping assembly 2 are inserted. Since the clamping shaft 21 is in a free state when the adapter 1 and the clamping assembly 2 are first inserted, the initial proximal position of the clamping shaft is not strictly limited to a fixed position and can move slightly in the axial direction.

[0038] The adapter 1 is provided with an axially movable and rotatable driving shaft 11 and a driving mechanism. The driving mechanism is connected with the driving shaft 11 and drives the driving shaft 11 to move axially and rotate. The driving mechanism can be any mechanism that can achieve the function, for example, the driving shaft 11 is a rotary body, and the part near the end of the driving shaft 11 is provided with external threads. The driving mechanism includes a longitudinal movement driving motor and a rotation driving motor. The rotation of the longitudinal movement driving motor is transmitted to the gear external teeth, which drives the gear to rotate. The gear internal teeth are engaged with the external threads of the driving shaft 11 to form a "screw nut" transmission relationship, so that the rotation of the gear is converted into the forward and backward movement of the driving shaft 11 along the axis. The rotation driving motor is connected with the driving shaft 11 and drives the driving shaft 11 to rotate. In this case, the locking of the driving shaft 11 and the clamping bin shaft 21 is the locking that allows them to move axially and rotate at the same time. When the adapter 1 and the clamping bin assembly 2 are inserted, the driving shaft 11 is located on the proximal side of the clamping bin shaft 21. In this embodiment, the driving shaft 11 can move between the driving shaft proximal end initial position, the connection position and the driving shaft distal end terminal position arranged from proximal to distal under the driving of the driving mechanism.

[0039] Referring to Figure 3 When the adapter 1 and the clamping bin assembly 2 are just inserted, the driving shaft 11 is in the driving shaft proximal end initial position (a in Figure 3 ), and the clamping bin shaft 21 is in the clamping bin shaft proximal end initial position. At this time, the distal end of the driving shaft 11 is axially spaced from the proximal end of the clamping bin shaft 21. The driving shaft proximal end initial position can be the limit position of the driving shaft 11 on the proximal side, or it can be the position of the driving shaft 11 in the natural state when the adapter 1 and the clamping bin assembly 2 are inserted, rather than the limit position. If the driving shaft 11 and the clamping bin shaft 21 form a connection when the adapter 1 and the clamping bin assembly 2 are inserted and pulled out, the connection will resist the insertion and pulling out of the adapter 1 and the clamping bin assembly 2. Therefore, in order to make the insertion and pulling out of the adapter 1 and the clamping bin assembly 2 smoother, the driving shaft 11 and the clamping bin shaft 21 are not in contact when they are in the respective proximal end initial positions.

[0040] Referring to Figure 3 and Figure 4 When the clamping bin shaft 21 needs to be driven to move distally, the driving shaft 11 travels linearly from the driving shaft proximal end initial position to the connection position (b in Figure 3 and Figure 4 ) in the distal direction, meets the clamping bin shaft 21 located in the clamping bin shaft proximal end initial position, and forms a connection that can be separated under the action of an external axial force, that is, at this time, if the adapter 1 and the clamping bin assembly 2 are to be separated, the clamping bin shaft 21 or the driving shaft 11 is given an axial force away from the other, and the clamping bin shaft 21 and the driving shaft 11 can still be separated.

[0041] Of course, in other embodiments, the connection position can also be the proximal initial position of the drive shaft 11, that is, when the adapter 1 and the cartridge assembly 2 are inserted, the drive shaft 11 has already formed an axially detachable connection with the cartridge shaft 21 under the action of the axial force. Of course, as mentioned above, in this way, the resistance to the insertion and removal of the adapter 1 and the cartridge assembly 2 will be increased, but it still falls within the protection scope of the present application.

[0042] With reference to Figure 4 When the drive shaft 11 continues to move linearly from the connection position to the distal end, the drive shaft 11 pushes the cartridge shaft 21 to move away from the proximal initial position of the cartridge shaft 21 to the distal end, and when the drive shaft 11 moves to the distal end termination position of the drive shaft 11, the cartridge shaft 21 moves to the distal end termination position of the cartridge shaft 21. When the cartridge shaft 21 is located at the distal end termination position of the cartridge shaft 21 and the position between the proximal initial position of the cartridge shaft 21 and the distal end termination position of the cartridge shaft 21, and the drive shaft 11 is located at the distal end termination position of the drive shaft 11 and the position between the connection position and the distal end termination position of the drive shaft 11, the cartridge shaft 21 and the drive shaft 11 are in a locked state, that is, they form a fixed connection that moves together and rotates together, and the drive shaft 11 can drive the cartridge shaft 21 to move axially and rotate. As discussed above, in this embodiment, the drive shaft 11 is rotatable and axially movable, so the lock (that is, the fixed connection) between the drive shaft 11 and the cartridge shaft 21 is a fixed connection that moves together and rotates together. If the movement mode of the drive shaft 11 changes in other embodiments, the content defined by the lock will also change, which will be described in detail in Embodiment 3 and Embodiment 4.

[0043] Similarly, when the drive shaft 11 moves from the distal end termination position of the drive shaft 11 to the proximal initial position of the cartridge shaft 21 in the proximal direction to the connection position, the drive shaft 11 pulls the cartridge shaft 21 back to the proximal initial position of the cartridge shaft 21, and the lock between them becomes an axially detachable connection under the action of the external force. When the drive shaft 11 continues to move proximally from the connection position, or when the cartridge assembly 2 is separated from the adapter 1, the drive shaft 11 and the cartridge shaft 21 are axially separated.

[0044] Therefore, under the drive of the drive shaft 11, the cartridge shaft 21 can move between the proximal initial position of the cartridge shaft 21 and the distal end termination position of the cartridge shaft 21. Among them, the distal end termination position of the drive shaft 11 is not limited to the limit position of the drive shaft 11 at the distal end. According to the actual use, the absolute position of the distal end termination position of the drive shaft 11 can be changed, and therefore the absolute position of the distal end termination position of the cartridge shaft 21 can also be changed, which is not limited here.

[0045] In summary, on one hand, the clamping bin shaft 21 and the drive shaft 11 are connected in an axially outward force detachable manner at the initial position of the proximal end of the clamping bin shaft, facilitating the plug-in connection of the adapter 1 and the clamping bin assembly 2; on the other hand, the clamping bin shaft 21 and the drive shaft 11 are locked at other positions except the initial position of the proximal end of the clamping bin shaft, so that when the clamping bin shaft 21 needs to be returned from the distal end terminal position of the clamping bin shaft to the initial position of the proximal end of the clamping bin shaft, the movement of the drive shaft 11 in the proximal direction can directly pull the clamping bin shaft 21 back to the initial position of the proximal end of the clamping bin shaft, the pulling back effect is stable and reliable, and the problem of unable to fire again due to the failure of the clamping bin shaft 21 to return is avoided. At the same time, at other positions except the initial position, the clamping bin shaft and the drive shaft are locked, and the clamping bin assembly 2 and the adapter 1 are also locked with the clamping bin shaft and the drive shaft (of course, there can be other locking mechanisms between the clamping bin assembly and the adapter), so the clamping bin assembly cannot be pulled out, which protects the stability of the mechanism operation and the safety of the user.

[0046] Referring to Figure 3 and Figure 4 In the present embodiment, the first locking structure is arranged on the clamping bin shaft 21, the second locking structure 12 is arranged on the drive shaft 11, and the locking control structure is arranged in the clamping bin assembly 2.

[0047] The first locking structure includes an axial insertion hole 22 and a clamping piece 23. The axial insertion hole 22 is arranged at the proximal end of the clamping bin shaft 21, and the axial insertion hole 22 is inserted with the distal end of the drive shaft 11. The clamping piece 23 is inserted into the axial insertion hole 22 in a transverse movable manner, and clamps the distal end of the drive shaft 11. In the present embodiment, the clamping piece 23 includes a plurality of locking beads distributed around the axis of the clamping bin shaft 21, each group of locking beads includes two locking beads arranged in a transverse direction, the hole for accommodating the locking beads on the clamping bin shaft 21 is a transverse taper hole 25, the small end of the transverse taper hole 25 communicates with the axial insertion hole 22, and the locking beads can partially pass out of the small end of the taper hole. Wherein, “transverse” refers to the direction perpendicular to the axis of the clamping bin shaft 21, that is, the direction perpendicular to the axial insertion hole 22 from the side wall of the clamping bin shaft 21. Of course, the present application is not limited to this, the number of locking beads can also be one or more than three, and the clamping piece 23 can also be a common clamping component such as a bolt or a spring.

[0048] The second locking structure 12 is a plurality of locking grooves arranged on the distal end of the drive shaft 11 one by one corresponding to the plurality of locking beads, that is, the plurality of locking grooves are distributed along the axis. The matching arrangement of the plurality of locking beads and the plurality of locking grooves can make the drive shaft 11 pull back the clamping bin shaft 21 more stably and reliably. In order to realize the common rotation of the drive shaft 11 and the clamping bin shaft 21, an independent locking groove is arranged corresponding to each group of locking beads, and if the common rotation of the drive shaft 11 and the clamping bin shaft 21 is not required, an annular locking groove can be arranged to cooperate with the locking beads.

[0049] Meanwhile, in order to ensure that the adapter 1 and the clamping bin assembly 2 are easy to plug, and that the multiple sets of locking beads and the multiple sets of locking grooves are in position correspondence when they are plugged (that is, the first locking structure and the second locking structure 12 are matched), on the one hand, the multiple sets of locking beads and the multiple sets of locking grooves are evenly arranged along the axis to reduce the difficulty of alignment; on the other hand, the guide structure is arranged in the adapter 1 and the clamping bin assembly 2 to ensure that when the guide structure is guided to the right position, the multiple sets of locking beads and the multiple sets of locking grooves can be one-to-one correspondence.

[0050] Referring to Figure 5 and Figure 6 , the implementation mode of the guide structure can be that a guide part 13 is arranged on the adapter 1, so that the clamping bin assembly 2 is automatically guided to the right position during the process of being inserted into the adapter 1 while rotating.

[0051] Specifically, the guide part 13 is a guide groove arranged on the adapter 1, which extends along the circumference from a position of the end face of the adapter 1 facing the distal end direction and gradually increases in depth during the extension process to connect the insertion slot 14 on the adapter 1. Thus, as the clamping bin assembly 2 is inserted while rotating, the guide groove guides the insertion piece 212 in the clamping bin assembly 2 that needs to be inserted into the insertion slot 14 to the insertion slot 14. In order to make the direction of the clamping bin assembly 2 not be limited when being inserted while rotating, two guide grooves are symmetrically arranged on both sides of the insertion slot 14, both of which gradually increase in depth towards the insertion slot 14 between them. When multiple insertion slots 14 are arranged, the multiple insertion slots 14 are evenly arranged along the circumference. Correspondingly, multiple guide parts 13 are arranged along the circumference. Taking one insertion slot 14 and the two guide parts 13 on both sides of it as a group, each group is the same and is evenly arranged along the circumference. In this way, blind installation is possible, and installation travel is saved, which is easy to install.

[0052] Correspondingly, when multiple insertion slots 14 are evenly arranged along the circumference, multiple insertion pieces 212 are also evenly arranged along the circumference in the clamping bin assembly 2. The insertion piece 212 of the clamping bin assembly 2 is a boss, the proximal end and the distal end of which are tapered to form a triangle, an arc or a trapezoid, which is beneficial to smooth and convenient guiding during guiding and pulling out. In this embodiment, the proximal end and the distal end of the boss are triangular, and the middle is rectangular, forming a double arrow shape. In this way, the tapered proximal end of the boss walks on the guide groove as the clamping bin assembly 2 rotates, until it walks to the insertion slot 14 and is inserted into the insertion slot 14, and when it is pulled out, the tapered distal end forms a guide.

[0053] In addition, the insertion piece 212 can also be changed to a plug elastically connected in the clamping bin assembly 2, and the deformation direction of the elastic connection is axial. In this way, it can prevent the rotation from being too fast and missing the insertion slot.

[0054] In summary, when the cartridge assembly 2 is inserted into the adapter 1, the first locking structure on the cartridge shaft 21 and the second locking structure 12 on the drive shaft 11 are matched under the guidance of the guide 13.

[0055] Further, the locking control structure comprises a releasing surface 24 and a limiting surface 26 on the outside of the cartridge shaft 21, the limiting surface 26 is located distally to the releasing surface 24, the releasing surface 24 and the limiting surface 26 can be part of the inner wall of the tube 211 or part of the inner wall of other components in the tube 211, which is not limited herein. In the embodiment, the releasing surface 24 is an annular surface, and the limiting surface 26 is also an annular surface, the diameter of the releasing surface 24 is larger than the diameter of the limiting surface 26. A smooth transition is formed between the limiting surface 26 and the releasing surface 24, such as the inclined surface shown in the figure, during the movement of the clamping piece with the cartridge shaft to the distal end, the inclined surface gradually presses against the clamping piece, and the clamping piece gradually locks the drive shaft. This gradual locking process is considered as a separable connection under axial force when the locking is not sufficient to resist the insertion and extraction force of the cartridge assembly, otherwise, it is considered to be locked.

[0056] When the cartridge shaft 21 is at the initial position of the proximal end of the cartridge shaft, the releasing surface 24 is spaced apart from the cartridge shaft 21, and the spacing distance is set to enable the clamping piece 23 to move out of the axial insertion hole 22 but not to fall out of the transverse taper hole 25, thereby providing space for the outward movement of the clamping piece 23, which is not limited to the clamping piece 23.

[0057] When the cartridge shaft 21 is at the terminal position of the distal end of the cartridge shaft and the position between the initial position of the proximal end of the cartridge shaft and the terminal position of the distal end of the cartridge shaft, the limiting surface 26 limits the clamping piece 23 to be inserted into the axial insertion hole 22 and the distal end of the drive shaft 11, i.e., the locking bead is partially inserted into the locking groove under the action of the limiting surface 26, thereby forming a lock with the locking groove.

[0058] Therefore, the locking control structure cooperates with the first locking structure and the second locking structure 12 to enable the cartridge shaft 21 to form a connection that can be unlocked under axial external force at the initial position of the proximal end of the cartridge shaft, and to lock the cartridge shaft 21 with the drive shaft 11 at the terminal position of the distal end of the cartridge shaft and the position between the initial position of the proximal end of the cartridge shaft and the terminal position of the distal end of the cartridge shaft.

[0059] It can be understood that in other embodiments, the releasing surface 24 and the limiting surface 26 can also be arc surfaces cooperating with the clamping piece 23, and multiple clamping pieces 23 cooperate with multiple arc surfaces.

[0060] Of course, the first locking structure and the second locking structure 12 can also be other structures.

[0061] For example, referring to Figure 7The first locking structure is an expansion sleeve 213 located near the end of the clamping shaft, with a circumferential locking hole 214 on the expansion sleeve 213; the second locking structure 12 consists of multiple flexible snap-fits 215; the locking control structure is the same as described above. At this time, when the clamping shaft 21 is in its initial position near the end of the clamping shaft, the expansion sleeve 213 slightly opens outwards, and the flexible snap-fits 215 are inserted into the locking holes on the expansion sleeve 213 as the drive shaft 11 moves axially. When the clamping shaft 21 moves to the distal end, the limiting surface 26 presses the expansion sleeve 213 inwards, making the engagement between the expansion sleeve 213 and the flexible snap-fits 215 more secure, thereby forming a lock between the clamping shaft 21 and the drive shaft.

[0062] For example, such as Figure 8 As shown, the first locking structure is an expansion sleeve 213 located near the end of the clamping shaft. The expansion sleeve 213 has an axial insertion hole 22, preferably composed of a spherical hole and a conical hole connected together. The spherical hole is located at the distal end of the conical hole, and the small end of the conical hole is connected to the spherical hole. The diameter of the spherical hole is larger than the diameter of the small end of the conical hole. The second locking structure 12 is an insertion part at the distal end of the drive shaft. This insertion part can have the same diameter as the drive shaft or be constructed as a ball head 216. The locking control structure is the same as described above. At this time, when the clamping shaft 21 is in its initial position near the end of the clamping shaft, the expansion sleeve 213 is slightly open outwards, and the ball head 216 is inserted into the axial insertion hole 22 of the expansion sleeve 213, in a relaxed state. When the clamping shaft 21 moves to the distal end, the limiting surface 26 presses the expansion sleeve 213 inwards, making the engagement between the expansion sleeve 213 and the ball head 216 more secure, thereby forming a tight locking between the clamping shaft 21 and the drive shaft. The advantage of this structure is that it eliminates the need for a guide to align the first locking structure with the second locking structure.

[0063] Furthermore, in this embodiment, the clamp assembly 2 also includes a push clamp mechanism 29, a firing mechanism, a first reset member 27, and a second reset member 210. The push clamp mechanism 29 and the firing mechanism are at least partially located within the tube body 211. The push clamp mechanism 29 is used to deliver the clamp to the clamp 3 at the distal end of the applicator, and the firing mechanism is used to control the closing and opening of the clamp 3, firing the clamp when the clamp 3 is closed.

[0064] During the movement of the cartridge shaft 21 from the proximal initial position to the distal terminal position, the pusher 29 is first driven to move in the distal direction (the position at which the pusher 29 is first driven is the pusher position), until the distal-most clip is delivered to the clipper 3, and then the firing mechanism is driven to move in the distal direction (the position at which the firing mechanism is first driven is the firing position), until the cartridge shaft 21 reaches the distal terminal position, the clipper 3 is closed, and the firing is completed. In summary, the position at which the cartridge shaft 21 drives the pusher 29 to start moving is distal to the proximal initial position, the position at which the cartridge shaft 21 drives the firing mechanism to start moving is distal to the position at which the cartridge shaft 21 drives the pusher 29 to start moving, and the position at which the cartridge shaft 21 stops driving the firing mechanism is the distal terminal position.

[0065] The first reset member 27 is arranged between the pusher 29 and the cartridge shaft 21, stores energy during the movement of the cartridge shaft 21 from the proximal initial position to the distal terminal position, and drives the pusher 29 to reset during the movement of the cartridge shaft 21 from the distal terminal position to the proximal initial position. The energy storage can be a compression deformation or a tensile deformation. The first reset member 27 can be a tension spring, a compression spring, a rubber member, or the like.

[0066] Preferably, the cartridge shaft 21 is a rotary body, and the end opposite to the axial insertion hole 22 is provided with a receiving cavity, the first reset member 27 is partially arranged in the receiving cavity, the pusher 29 is connected to the cavity opening of the receiving cavity, and the first reset member 27 is connected to the pusher 29. The end of the cartridge shaft 21 having the axial insertion hole 22 has the largest diameter, and forms a groove or an end surface connected to one end of the reset member 28.

[0067] The second reset member 210 is arranged between the firing mechanism and the tube 211, or between the firing mechanism and the cartridge shaft 21, stores energy during the movement of the cartridge shaft 21 from the proximal initial position to the distal terminal position, and drives the firing mechanism to reset during the movement of the cartridge shaft 21 from the distal terminal position to the proximal initial position. The energy storage can be a compression deformation or a tensile deformation. The second reset member 210 can be a tension spring, a compression spring, a rubber member, or the like.

[0068] In addition, an inductive switch can be arranged at one or more of the proximal initial position, the connection position, the clip delivery position, the firing position, and the distal terminal position, to facilitate obtaining the position of the drive shaft and / or the cartridge shaft. Moreover, when reaching a position having an inductive switch, the drive shaft can be paused to move forward or backward, to form discontinuous movement.

[0069] Embodiment Two

[0070] The embodiment uses the clip cartridge shaft driving method of the clip applier of embodiment one, including a clip cartridge shaft advancing step and a clip cartridge shaft pulling back step.

[0071] The clip cartridge shaft advancing step includes:

[0072] S11, when the adapter 1 and the clip cartridge assembly 2 of the applicator are connected, the driving shaft 11 is located at the initial position of the proximal end of the driving shaft, the clip cartridge shaft 21 is located at the initial position of the proximal end of the clip cartridge shaft, and the driving shaft 11 and the clip cartridge shaft 21 are axially spaced. The driving mechanism drives the driving shaft 11 to move to the distal end direction to meet the clip cartridge shaft 21 located at the initial position of the proximal end of the clip cartridge shaft, forming a separable connection under the action of an axial external force.

[0073] S12, the driving mechanism continues to drive the driving shaft 11 to move towards the distal end termination position of the driving shaft, and the driving shaft 11 in turn pushes the clip cartridge shaft 21 to move from the initial position of the proximal end of the clip cartridge shaft to the distal end termination position of the clip cartridge shaft. After the clip cartridge shaft 21 leaves the initial position of the proximal end of the clip cartridge shaft, the driving shaft 11 and the clip cartridge shaft 21 are locked and remain in a locked state.

[0074] The clip cartridge shaft pulling back step includes:

[0075] S21, the driving shaft 11 located at the distal end termination position of the driving shaft drives the clip cartridge shaft 21 located at the distal end termination position of the clip cartridge shaft to move towards the proximal end direction, until the clip cartridge shaft 21 is pulled back to the initial position of the proximal end of the clip cartridge shaft, the driving shaft 11 and the clip cartridge shaft 21 become a separable connection under the action of an axial external force.

[0076] S22, the driving shaft 11 continues to move towards the proximal end direction and separates from the clip cartridge shaft 21.

[0077] In summary, on the one hand, the initial position of the proximal end of the clip cartridge shaft 21 and the driving shaft 11 form a separable connection under the action of an axial external force, facilitating the plug-in connection of the adapter 1 and the clip cartridge assembly 2; on the other hand, at other positions except the initial position of the proximal end of the clip cartridge shaft, the clip cartridge shaft 21 and the driving shaft 11 form a lock, so that when the clip cartridge shaft 21 needs to be returned from the distal end termination position of the clip cartridge shaft to the initial position of the proximal end of the clip cartridge shaft, the movement of the driving shaft 11 towards the proximal end direction can directly pull back the clip cartridge shaft 21 to the initial position of the proximal end of the clip cartridge shaft, the pulling back effect is stable and reliable, and the problem of unable to fire again caused by the failure of the clip cartridge shaft 21 to return is avoided. At the same time, at other positions except the initial position, the clip cartridge assembly 2 and the adapter 1 are locked with the clip cartridge shaft 21 and the driving shaft 11, and the clip cartridge assembly 2 cannot be pulled out, protecting the stability of the mechanism operation and the safety of the user.

[0078] Furthermore, when the adapter 1 and the clip cartridge assembly 2 are plugged, the clip cartridge shaft 21 and the driving shaft 11 are still in a separated state, and the connection structure between them is removed, so that the plugging is more smooth. However, the present application is not limited to this, and the connection position can also be used as the initial position of the driving shaft 11, and when the adapter 1 and the clip cartridge assembly 2 are plugged, the driving shaft 11 at the connection position and the clip cartridge shaft 21 at the initial position of the proximal end of the clip cartridge shaft form a connection that can be separated under axial force.

[0079] Embodiment three

[0080] The main change of the present embodiment based on the embodiments one and two is that:

[0081] The driving shaft 11 is only axially moved by the axial movement driving mechanism, and cannot be rotated, and at this time, the locking between the driving shaft 11 and the clip cartridge shaft 21 is a locking that allows the two to be axially moved at the same time and relatively rotated, and the rotation of the clip cartridge shaft 21 can be realized by manually rotating other structures connected with the clip cartridge shaft 21, for example, the housings of the adapter 1 and the clip cartridge assembly 2 both include rotating housings, the two rotating housings are connected, and the rotating housing of the clip cartridge assembly is connected with the clip cartridge shaft, so that the rotating housing of the adapter 1 can be manually rotated, and the clip cartridge shaft 21 is rotated. Thus, at this time, the locking between the driving shaft 21 and the clip cartridge shaft 11 is an axial locking.

[0082] At this time, in the case where the first locking structure includes the axial insertion hole 22 and the clamping piece 23, the second locking structure 12 is an annular locking groove, and the outer end of the clamping piece of the first locking structure forms a circular arc or is fixed with a roller, so that the clamping piece can move circumferentially in the annular locking groove, so that the driving shaft 11 and the clip cartridge shaft 21 are relatively rotatable.

[0083] In addition, in the case where the first locking structure is the expansion sleeve 213 and the second locking structure is the ball head 216, by the size of the ball head 216, the expansion sleeve 213, the axial hole and the limiting surface, it is realized that the ball head 216 can be rotated relative to the expansion sleeve, but the clip cartridge shaft and the driving shaft are still axially locked.

[0084] Embodiment four

[0085] In this embodiment, only a rotating driving mechanism is provided to drive the rotation of the driving shaft 11, at this time, the rotation of the driving shaft 11 needs to be converted into the movement of the cartridge shaft 21. In this embodiment, the proximal end of the cartridge shaft 21 is connected with a nut, the outer wall of the nut is provided with external threads, the nut is screwed in a sleeve, the inner wall of the sleeve is provided with internal threads for screwing. The proximal end of the sleeve and the distal end of the driving shaft 11 form a lock that can rotate together when the adapter 1 and the cartridge assembly 2 are inserted, and are separated when the adapter 1 and the cartridge assembly 2 are separated. Of course, the structure for converting the rotation of the driving shaft 11 into the movement of the cartridge shaft 21 is not limited to the above, and any existing structure that can achieve this function can be used instead.

[0086] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A clip cartridge shaft drive method for a clip applier, the method comprising: The clip cartridge shaft advancing step and the clip cartridge shaft pulling back step are included. The clip applier includes an adapter (1) and a clip cartridge assembly (2) detachably connected together; The clip cartridge shaft advancing step includes: S11, the drive shaft (11) of the clip applier forms a separable connection with the clip cartridge shaft (21) located at the proximal end initial position of the clip cartridge shaft under the action of an axial external force; S12, the drive shaft (11) drives the clip cartridge shaft (21) to move from the proximal end initial position of the clip cartridge shaft to the distal end terminal position of the clip cartridge shaft, and after the clip cartridge shaft (21) leaves the proximal end initial position of the clip cartridge shaft, the drive shaft (11) and the clip cartridge shaft (21) are locked and remain in a locked state; The clip cartridge shaft pulling back step includes: S21, the drive shaft (11) drives the clip cartridge shaft (21) to move towards the proximal end direction until the clip cartridge shaft (21) is pulled back to the proximal end initial position of the clip cartridge shaft, and the drive shaft (11) and the clip cartridge shaft (21) become a separable connection under the action of an axial external force; The first locking structure is provided on the clip cartridge shaft (21), the second locking structure (12) is provided on the drive shaft (11), and a locking control structure is provided in the clip cartridge assembly (2); The first locking structure includes an axial insertion hole (22), and the axial insertion hole (22) is provided at the proximal end of the clip cartridge shaft (21). The axial insertion hole (22) is inserted with the distal end of the drive shaft (11); The locking control structure includes a release surface (24) and a limiting surface (26) located outside the clip cartridge shaft (21). Both the release surface (24) and the limiting surface (26) are annular surfaces, and the diameter of the release surface (24) is greater than that of the limiting surface (26); When the clip cartridge shaft (21) is at the proximal end initial position of the clip cartridge shaft, the release surface (24) is spaced apart from the clip cartridge shaft (21), allowing the axial insertion hole (22) to be disengaged from the distal end of the drive shaft (11); When the clip cartridge shaft (21) is at the distal end terminal position of the clip cartridge shaft, the proximal end initial position of the clip cartridge shaft, and the position between the distal end terminal position of the clip cartridge shaft and the proximal end initial position of the clip cartridge shaft, the limiting surface (26) prevents the insertion hole (22) from being inserted with the distal end of the drive shaft (11).

2. The clip applier clip cartridge shaft driving method according to claim 1, wherein In step S11: When the clip cartridge assembly (2) and the adapter (1) of the clip applier are connected, the drive shaft (11) is axially spaced apart from the clip cartridge shaft (21) located at the proximal end initial position of the clip cartridge shaft; The drive shaft (11) moves in the distal end direction until it forms a separable connection with the clip cartridge shaft (21) located at the proximal end initial position of the clip cartridge shaft under the action of an axial external force; The clip cartridge shaft (21) pulling back step further includes: S22, the drive shaft (11) continues to move in the proximal end direction and separates from the clip cartridge shaft (21).

3. A clip applier including an adapter (1) and a clip cartridge assembly (2) detachably connected together, wherein The clip cartridge assembly (2) comprises a clip cartridge shaft (21) capable of moving between a clip cartridge shaft proximal initial position and a clip cartridge shaft distal terminal position; The adapter (1) comprises a drive shaft (11) located proximally to the clip cartridge shaft (21); When the clip cartridge shaft (21) is in the clip cartridge shaft proximal initial position, the clip cartridge shaft (21) and the drive shaft (11) form a separable connection under axial external force; When the clip cartridge shaft (21) is in the clip cartridge shaft distal terminal position and the positions between the clip cartridge shaft proximal initial position and the clip cartridge shaft distal terminal position, the clip cartridge shaft (21) is locked with the drive shaft (11); The first locking structure comprises an axial insertion hole (22) provided at the proximal end of the clip cartridge shaft (21), and the axial insertion hole (22) is inserted with the distal end of the drive shaft (11); The locking control structure comprises a release surface (24) and a limiting surface (26) located outside the clip cartridge shaft (21), both of which are annular surfaces, and the diameter of the release surface (24) is greater than that of the limiting surface (26); When the clip cartridge shaft (21) is in the clip cartridge shaft proximal initial position, the release surface (24) is spaced apart from the clip cartridge shaft (21), allowing the axial insertion hole (22) to be disengaged from the distal end of the drive shaft (11); When the clip cartridge shaft (21) is in the clip cartridge shaft distal terminal position and the positions between the clip cartridge shaft proximal initial position and the clip cartridge shaft distal terminal position, the limiting surface (26) prevents the axial insertion hole (22) from being inserted with the distal end of the drive shaft (11).

4. The clip applier of claim 3, wherein: The drive shaft (11) is capable of moving between a drive shaft proximal initial position, a connection position and a drive shaft distal terminal position arranged from proximal to distal; When the drive shaft (11) is in the drive shaft proximal initial position, it is axially spaced apart from the clip cartridge shaft (21) in the clip cartridge shaft proximal initial position; When the drive shaft (11) is in the connection position, it forms a separable connection with the clip cartridge shaft (21) in the clip cartridge shaft proximal initial position under axial external force; When the drive shaft (11) is in the drive shaft distal terminal position, the clip cartridge shaft (21) is in the clip cartridge shaft distal terminal position.

5. The clip applier of claim 3, wherein: The adapter (1) comprises a drive mechanism connected with the drive shaft (11) for driving the drive shaft (11) to move and rotate along its axial direction, and the locking of the drive shaft (11) and the clip cartridge shaft (21) is a simultaneous axial movement and rotation locking.

6. The clip applier of claim 3, wherein: ​ The first locking structure further comprises a clamping piece (23) which is transversely movably inserted into the axial insertion hole (22); When the clip cartridge shaft (21) is in the initial position of the proximal end of the clip cartridge shaft, the interval distance between the release surface (24) and the clip cartridge shaft (21) is set to enable the clamping piece (23) to move out of the axial insertion hole (22) When the clip cartridge shaft (21) is in the terminal position of the distal end of the clip cartridge shaft and the position between the initial position of the proximal end of the clip cartridge shaft and the terminal position of the distal end of the clip cartridge shaft, the limiting surface (26) limits the clamping piece (23) to be inserted into the axial insertion hole (22) and clamped to the distal end of the driving shaft (11).

7. The clip applier of claim 6, wherein: The clamping piece (23) comprises a plurality of groups of locking beads distributed around the axis of the clip cartridge shaft (21), each group of locking beads comprising one locking bead or a plurality of locking beads arranged in a transverse direction, the hole of the clip cartridge shaft (21) accommodating the locking beads being a transverse taper hole (25), the small end of the transverse taper hole (25) being communicated with the axial insertion hole (22), and the locking beads being capable of partially penetrating out of the small end of the taper hole; The second locking structure (12) is a plurality of locking grooves provided on the distal end of the driving shaft (11) in one-to-one correspondence with the plurality of groups of locking beads, and the locking beads are partially inserted into the locking grooves under the action of the limiting surface (26) to form locking with the locking grooves.

8. The clip applier of claim 3, wherein: The clip cartridge assembly (2) further comprises a tube body (211), a clip pushing mechanism (29), a firing mechanism, a first return member (27) and a second return member (210), and the clip cartridge shaft (21), the clip pushing mechanism (29) and the firing mechanism are at least partially located in the tube body (211); During the movement of the clip cartridge shaft (21) from the initial position of the proximal end of the clip cartridge shaft to the terminal position of the distal end of the clip cartridge shaft, the clip pushing mechanism (29) is first driven to move in the distal direction, and then the firing mechanism is driven to move in the distal direction; The first return member (27) is arranged between the clip pushing mechanism (29) and the clip cartridge shaft (21), stores energy during the movement of the clip cartridge shaft (21) from the initial position of the proximal end of the clip cartridge shaft to the terminal position of the distal end of the clip cartridge shaft, and drives the clip pushing mechanism (29) to reset during the movement of the clip cartridge shaft (21) from the terminal position of the distal end of the clip cartridge shaft to the initial position of the proximal end of the clip cartridge shaft; The second return member (210) is arranged between the firing mechanism and the tube body (211) or the clip cartridge shaft (21), stores energy during the movement of the clip cartridge shaft (21) from the initial position of the proximal end of the clip cartridge shaft to the terminal position of the distal end of the clip cartridge shaft, and drives the firing mechanism to reset during the movement of the clip cartridge shaft (21) from the terminal position of the distal end of the clip cartridge shaft to the initial position of the proximal end of the clip cartridge shaft.

Images