CN114366227B

CN114366227B - Clip applier and method for driving drive shaft thereof

Info

Publication number: CN114366227B
Application number: CN202011105224.0A
Authority: CN
Inventors: 徐荣华; 沈清
Original assignee: Suzhou IntoCare Medical Technology Co Ltd
Current assignee: Suzhou IntoCare Medical Technology Co Ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2023-01-13
Anticipated expiration: 2040-10-15
Also published as: CN114366227A

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a clip applier and a driving method of a driving shaft of the clip applier. A locking mechanism is disposed in the adapter of the clip applier, a locking structure is disposed in the clip cartridge assembly of the clip applier, and a drive device selectively drives the drive shaft in an unlocked position and a locked position. The locking mechanism and the locking structure form an engagement that locks the cartridge assembly in the adapter housing when the drive shaft is in the locked position. During movement of the drive shaft from the locked position to the unlocked position, the drive lock mechanism and the locking structure form an engagement that enables the cartridge assembly to be inserted into and removed from the adapter housing. Therefore, the locking mechanism is associated with the driving shaft, namely the driving shaft is involved in unlocking operation, and compared with the condition that an operator manually operates the locking mechanism to unlock the locking mechanism and the locking mechanism, the unlocking of the driving shaft is simpler and easier, and errors are not easy to occur.

Description

Clip applier and method for driving shaft thereof

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a clip applier and a driving method of a driving shaft of the clip applier.

Background

Surgical clip appliers are commonly used to clip tubular tissue during surgery, thereby avoiding fluid seepage within the tubular tissue.

In the prior art, a clip bin assembly of a clip applier is detachably arranged on an adapter of the clip applier, and in order to ensure the safety of an operator, the clip bin assembly and the adapter need to be locked when being arranged, which inevitably involves an unlocking structure and an unlocking operation of locking between the clip bin assembly and the adapter. How to make the unlocking operation simple and easy is a technical problem to be solved urgently in the field.

Disclosure of Invention

Technical problem to be solved

In order to solve the above problems of the prior art, the present invention provides a clip applier to solve the technical problem of how to make the unlocking operation simple and easy.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

the invention provides a clip applier, which comprises an adapter and a clip bin assembly which are detachably connected together, wherein the adapter comprises an adapter shell, a driving shaft and a driving device; the driving device can selectively drive the driving shaft to be in the unlocking position and the locking position; when the drive shaft is in the locking position, the locking mechanism and the locking structure form the fit for locking the cartridge assembly in the adapter shell; during movement of the drive shaft from the locked position to the unlocked position, the drive lock mechanism and the locking structure form an engagement that enables the cartridge assembly to be inserted into and removed from the adapter housing.

Preferably, the locking mechanism comprises a fixing sleeve, a locking piece and a driving assembly, the fixing sleeve is fixed in the adapter shell, the driving assembly is positioned outside the fixing sleeve and inside the adapter shell, and the locking piece is connected to the fixing sleeve; when the driving shaft is in a locking position, the driving assembly drives the locking piece to form a locking joint with the locking structure so that the cartridge assembly is locked with the fixing sleeve; in the process that the driving shaft moves from the locking position to the unlocking position, the driving assembly allows or drives the locking piece to be separated from the locking structure, so that the cartridge assembly can be inserted into the fixing sleeve and pulled out of the fixing sleeve.

Preferably, the driving shaft is connected with a pushing piece, and the driving assembly comprises a sliding piece and a reset driving piece; during movement of the drive shaft from the unlocked position to the locked position, resetting the drive member to drive the slide member to a position where the locking member engages the locking structure; during the process that the driving shaft moves from the locking position to the unlocking position, the movement of the driving shaft is converted into the movement of the pushing piece towards the proximal direction, and the pushing piece pushes the sliding piece to the position which allows or drives the locking piece to be separated from the locking structure during the process that the pushing piece moves towards the proximal direction.

Preferably, the sliding member includes an unlocking member and a locking ring, the locking ring is movably sleeved outside the fixing sleeve along the axial direction of the fixing sleeve, the unlocking member includes an abutting portion which forms an abutting with the abutting member in the process that the abutting member moves towards the proximal direction, and a connecting portion which is connected with the locking ring.

Preferably, the locking ring has a slide groove extending in the distal and proximal directions, and the connecting portion is inserted into the slide groove.

Preferably, the unlocking member is an annular sheet slidably sleeved on the driving shaft, the abutting portion is a portion of the annular sheet corresponding to the abutting member, and the connecting portion is a protrusion located at an edge of the annular sheet.

Preferably, the fixing sleeve is provided with a mounting hole, and the locking piece is positioned in the mounting hole; the inner wall of the locking ring is provided with a pressing surface and a releasing surface, and the pressing surface is positioned on the near side of the releasing surface; the locking structure is a locking groove; when the driving shaft is in the locking position, the pressing surface presses the locking piece to enable the locking piece to enter the locking groove to be engaged with the locking groove; the release surface corresponds to the locking member when the drive shaft is changed from the locked position to the unlocked position, and the locking member is disengaged from the locking groove when the cartridge assembly is inserted into and pulled out of the adapter housing.

Preferably, the driving device drives the driving shaft to horizontally move to an unlocking position and a locking position, the unlocking position is located at the near side of the locking position, and the pushing piece is fixed on the driving shaft; or the driving device drives the driving shaft to rotate to an unlocking position and a locking position, the driving shaft is provided with a threaded section, the pushing piece is screwed on the threaded section, the pushing piece is located at the first position when the driving shaft is located at the unlocking position, the pushing piece is located at the second position when the driving shaft is located at the second position, and the first position is located at the near side of the second position; or the driving device drives the driving shaft to rotate and move to the unlocking position and the locking position, the unlocking position is located on the near side of the locking position, the pushing piece is a bearing fixed on the driving shaft, the end face of the outer ring of the bearing is used for pushing against the sliding piece, or the pushing piece is fixed on the driving shaft, and the surface used for pushing against the sliding piece is provided with a rolling piece.

Preferably, the return drive is a spring, the spring is positioned between the slide and a fixed structure in the adapter housing, and the direction of deformation of the spring is in the axial direction of the drive shaft; or the reset drive is a magnetic attraction pair disposed between the slide and a fixed structure in the adapter housing.

Preferably, the drive means is capable of driving the drive shaft to move between an unlocked position, a locked position and a distal end position of the drive shaft, arranged from proximal to distal; the bin clamping assembly further comprises a bin clamping shaft capable of moving between a bin clamping shaft proximal end initial position and a bin clamping shaft distal end final position; when the driving shaft is positioned at the unlocking position, the driving shaft is axially spaced from the bin clamping shaft positioned at the initial position of the near end of the bin clamping shaft; the driving shaft is connected with the clamping cabin shaft at the initial position of the near end of the clamping cabin shaft in the process of moving from the unlocking position to the ending position of the far end of the driving shaft; the drive shaft pulls the cartridge shaft back to the cartridge shaft proximal end initial position and out of engagement with the cartridge shaft during movement from the drive shaft distal end termination position toward the unlocked position.

The invention also provides a driving method of the driving shaft of the clip applier, and the driving method adopts the clip applier and comprises the following steps: an unlocking step: the drive shaft moves from a locked position to an unlocked position, the drive locking mechanism and the locking structure form a fit that enables the cartridge assembly to be inserted into and removed from the adapter housing; locking: the drive shaft moves from the unlocked position to the locked position, and the locking mechanism and locking structure form a fit that locks the cartridge assembly in the adapter housing.

Preferably, the method of driving the drive shaft of the clip applier further comprises the steps of: the driving of the bin clamping shaft comprises the following working steps: the driving shaft moves from the unlocking position to the distal end terminating position of the driving shaft, is connected with the cabin clamping shaft positioned at the proximal end initial position of the cabin clamping shaft and pushes the cabin clamping shaft to move to the distal end terminating position of the cabin clamping shaft; a bin clamping shaft pulling step: the drive shaft moves from the drive shaft distal end termination position toward the unlocked position, pulling the cartridge shaft back to the cartridge shaft proximal end initial position and out of engagement with the cartridge shaft.

(III) advantageous effects

The invention has the beneficial effects that:

in the clip applier and the method for driving the drive shaft thereof according to the present invention, the drive shaft drives the locking mechanism to form a fit with the locking structure so that the clip cartridge assembly can be inserted into and extracted from the adapter housing in the process of moving the drive shaft from the locked position to the unlocked position. Therefore, the locking mechanism is associated with the driving shaft, namely the driving shaft is involved in unlocking operation, and compared with the condition that an operator manually operates the locking mechanism to unlock the locking mechanism and the locking mechanism, the unlocking of the driving shaft is simpler and easier, and errors are not easy to occur.

Drawings

Fig. 1 is a schematic view, partially in longitudinal cross section, of an embodiment 1 of a clip applier provided in the invention;

FIG. 2 is a schematic view, partly in longitudinal section, of embodiment 3 of a clip applier provided by the invention;

FIG. 3 is a schematic view, partially in longitudinal section, of embodiment 4 of a clip applier provided in the invention;

FIG. 4 is a schematic cross-sectional view of an unlocking member and a drive lever of embodiment 6 of a clip applier provided in accordance with the invention;

FIG. 5 is a schematic view, partly in longitudinal section, of embodiment 7 of a clip applier provided by the invention;

fig. 6 is a schematic view, partly in longitudinal section, of embodiment 8 of the clip applier provided in the invention, showing mainly the parts of the pusher connected to the drive shaft.

[ instruction of reference ]

1: an adapter; 101: an adapter housing; 102: a drive shaft; 103: a fixed sleeve; 104: a locking member; 105: a pushing member; 106: resetting the driving member; 107: unlocking the lock; 108: a locking ring; 109: a chute; 110: a connecting portion; 111: a pushing part; 112: mounting holes; 113: pressing the surface; 114: a release surface; 115: a negative magnetic member; 116: a positive magnetic member;

2: a cartridge assembly; 201: a locking groove; 202: a cartridge housing; 203: a bin clamping shaft; 204: a first reset member; 205: a second reset member; 206: a third reset member; 207: a proximal end limiting structure.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present embodiments of the invention, which are illustrated in the accompanying drawings. As used in the description of the invention, "distal" refers to the side closer to the patient and "proximal" refers to the side closer to the operator.

Example 1

As shown in FIG. 1, the present embodiment provides a clip applier that includes an adapter 1 and a cartridge assembly 2, where adapter 1 and cartridge assembly 2 are removably coupled together.

The adapter 1 comprises an adapter housing 101, a drive shaft 102, a drive means and a locking mechanism.

The drive shaft 102 and the driving device are connected and located in the adapter housing 101, and the driving device is used for driving the drive shaft 102 to move in two directions, wherein the two directions can be linear movement in two directions, rotation in place in two directions, and rotation in two directions (spiral advancing and spiral retreating). The driving device may include a power source (e.g., an electric motor, a motor), or may be a transmission portion directly or indirectly connected to the power source.

The locking mechanism comprises a fixing sleeve 103, a locking member 104, a reset driver 106, an unlocking member 107 and a locking ring 108.

In this embodiment, the fixed sleeve 103 is fixed within the adapter housing 101 and the proximal end of the cartridge assembly 2 is inserted into the fixed sleeve 103. The reset driver 106, the unlocking member 107 and the locking ring 108 are located outside the fixed sleeve 103 and inside the adapter housing 101. The lock ring 108 is fitted on the outside of the fixing sleeve 103 so as to be movable in the axial direction of the fixing sleeve 103, but is located on the inside of the adapter housing 101.

In this embodiment, a strip-shaped sliding groove 109 extending in the proximal direction is provided on the inner wall of the proximal end of the locking ring 108, and the unlocking member 107 is an annular piece slidably sleeved on the driving shaft 102, and in this embodiment, the middle of the annular piece is bowl-shaped and is recessed toward the proximal end side. The edge of the ring-shaped piece is a protruding projection which constitutes a coupling portion 110 to be inserted into the slide groove 109 of the lock ring 108. In the present embodiment, a plurality of slide grooves 109 are uniformly provided in the circumferential direction, and a plurality of projections, i.e., a plurality of connecting portions 110 are provided to be fitted with the plurality of slide grooves 109 in one-to-one correspondence. Thus, in this embodiment, the unlocking member 107 and the locking ring 108 are connected to each other to be relatively movable in the proximal and distal directions by a small distance, mainly to reduce the difficulty of assembly.

In the present embodiment, the driving device can drive the driving shaft 102 to move horizontally to the unlocking position and the locking position, i.e., the unlocking position and the locking position are aligned along the axial direction of the driving shaft 102, and the unlocking position is located at the near side of the locking position. At this time, the urging member 105 is fixed to the driving shaft 102. The annular piece as the unlocking element 107 forms a pushing part 111 corresponding to the pushing part 105, and the pushing part 111 pushes against the pushing part 105 in the process of moving the pushing part 105 toward the proximal direction. It can be understood that the arrangement of the pushing element 105 and the unlocking element 107 should be matched, for example, in the embodiment, the unlocking element 107 is arranged as a ring-shaped piece, then the pushing element 105 may be a pushing ring sleeved on the driving shaft 102, or may be a single independent pushing block fixed on the driving shaft 102, and for more stable pushing, when the independent pushing block is selected, a plurality of pushing blocks are uniformly arranged around the driving shaft 102. If the unlocking member 107 is a non-annular piece, i.e. a non-annular piece, the pushing member 105 may be a pushing ring sleeved on the driving shaft 102 to adapt to the unlocking member 107 of any shape, or may be a plurality of pushing blocks, but at this time, the pushing is completed by corresponding to the position of the unlocking member 107.

In this embodiment, the reset driver 106 is a spring that is sleeved over the locking ring 108, and the proximal end of the spring presses against a fixed structure in the adapter housing 101, which may be a protrusion on the inner wall of the adapter housing 101 or a structure that does not move during use of the clip applier that is fixed to another structure; the distal end of the spring bears against a step formed by the outer wall of the locking ring 108. Thus, the direction of deformation of the spring is in the axial direction of the drive shaft 102. Of course, one spring sleeved on the locking ring 108 may be changed into a plurality of independent springs arranged around the locking ring 108, but the structure of the embodiment is simpler and the elastic support is more stable.

In the present embodiment, an annular pressing surface 113 and an annular releasing surface 114 are formed on the inner wall of the distal end of the locking ring 108, and the pressing surface 113 is located on the near side of the releasing surface 114. In the present embodiment, a connection surface inclined to the release surface 114 and the pressing surface 113 is formed therebetween. The fixing sleeve 103 is provided with a mounting hole 112, and the locking member 104 is located in the mounting hole 112. Specifically, the locking member 104 in this embodiment is a locking bead, in this embodiment, a plurality of mounting holes 112 and locking beads are uniformly arranged in one circumference of the fixing sleeve 103, the diameter of the mounting hole 112 at the inner wall of the fixing sleeve 103 is smaller than that at the outer wall of the fixing sleeve 103, and the diameter of the locking bead is located between the diameters of the two ends of the mounting hole 112. Thereby, the locking beads may partly enter the inside of the fixing sleeve 103 but will not fall down towards the inside of the fixing sleeve 103.

In the present embodiment, a locking structure is provided in the cartridge assembly 2, specifically, the cartridge assembly 2 includes a cartridge housing 202, the locking structure is a locking groove 201 provided on an outer wall of the cartridge housing 202, and the locking groove 201 is an arc-shaped groove. The locking structure may comprise a plurality of locking grooves 201 (one locking groove 201 for one locking bead or one locking groove 201 for a plurality of locking beads), or may be a single annular groove, which in comparison is less demanding on manufacturing accuracy, but may provide both circumferential and axial locking functions if the plurality of locking grooves 201 are fitted with a plurality of locking beads, and only axial locking if the locking groove 201 is an annular groove. In the present embodiment, a plurality of locking grooves 201 are uniformly provided along the circumferential direction of the cartridge housing 202, and preferably, the plurality of locking grooves 201 are fitted with a plurality of locking beads in a one-to-one correspondence. Meanwhile, the adapter shell 101 and the cartridge shell 202 are respectively provided with the matched plug connectors, so that when the cartridge shell 202 and the adapter shell 101 are plugged in place, the positions of the locking balls and the locking grooves 201 are in one-to-one correspondence. And because a plurality of locking grooves 201 and a plurality of locking piece 104 all are the even setting, so any locking piece 104 all can with arbitrary locking groove 201 joint, and the installation stroke is practiced thrift in the forward and reverse all mountable, easily installation.

When the driving shaft 102 is in the locking position, the pushing part 105 on the driving shaft 102 does not push the unlocking part 107, the unlocking part 107 further does not limit the locking ring 108, and the locking ring 108 enables the pressing surface 113 to correspond to the locking bead under the action of the reset driving part 106, and as shown in fig. 1, the pressing surface 113 presses the locking bead to enter the locking groove 201 to be engaged with the locking groove 201.

When the driving shaft 102 moves from the locking position to the unlocking position in the proximal direction, the driving shaft 102 drives the pushing element 105 to move in the proximal direction, the pushing element 105 pushes the unlocking element 107 to move in the proximal direction, the unlocking element 107 pushes the proximal side wall of the sliding groove 109 of the locking ring 108, the locking ring 108 is further pushed to move in the proximal direction and serves as a spring of the reset driving element 106 to compress, meanwhile, the releasing surface 114 on the locking ring 108 corresponds to the locking bead, therefore, the pushing surface 113 does not limit the locking bead any more, and the locking bead can move outwards. If the locking bead is now located in the lower half of the adapter 1, the locking bead will move outwards under gravity, disengaging from the locking groove 201; if the locking ball is now located on the side or upper half of the adaptor 1, the locking ball remains in the locking groove 201 and when the cartridge assembly 2 is withdrawn and the cartridge assembly 2 is inserted, the side walls of the locking groove 201 have an outward component force on the locking ball which moves outward until it disengages from the locking groove 201. It will be appreciated that the release surface 114 is provided to give way for outward movement of the locking bead. Thereby, the locking piece 104 is selectively locked with the locking groove 201.

When the driving shaft 102 moves from the unlocking position to the locking position in the distal direction, the driving shaft 102 drives the abutting part 105 to move towards the distal direction, the abutting part 105 is separated from the unlocking part 107, and the unlocking part 107 no longer has an acting force on the locking ring 108, the reset driving part 106 drives the locking ring 108 to move towards the distal direction, the side wall of the proximal end of the sliding groove 109 of the locking ring 108 pushes the unlocking part 107 to move towards the distal direction, if the driving shaft 102 moves slowly, the unlocking part 107 abuts against the abutting part 105, the abutting part 105 limits the unlocking part 107 and further limits the moving speed of the locking ring 108, and if the driving shaft 102 moves quickly, the unlocking part 107 does not contact with the abutting part 105. The reset actuator 106 drives the locking ring 108 to the abutment surface 113 on the locking ring 108 in correspondence with the locking bead which is pushed into the locking groove 201 forming the locking element 104 in engagement with the locking structure. The stopping of the lock ring 108 may be accomplished by releasing the deforming force of the reset driver 106, or by providing a stop structure on the side of the lock ring 108 opposite the reset driver 106, which may be a part of the adapter housing 101 or a structure fixed in the adapter housing 101.

In summary, during movement of the drive shaft 102 from the locked position to the unlocked position, the drive shaft 102 drives the locking mechanism into engagement with the locking structure to enable insertion and withdrawal of the cartridge assembly 2 into and out of the adapter housing 101. Thus, the present embodiment associates the locking mechanism with the drive shaft 102, i.e., allows the drive shaft 102 to participate in the unlocking operation, which is simpler and easier to unlock the drive shaft 102 and less prone to error than if the operator manually operated the locking mechanism to unlock the locking mechanism from the locking mechanism. The setting of above-mentioned unblock position has realized that the fixed point can be inserted, but the function that the non-fixed point can not be inserted prevents the maloperation.

Further, the drive means is capable of driving the drive shaft 102 to move linearly between an unlocked position, a locked position and a distal end position of the drive shaft, all arranged from proximal to distal.

The cartridge assembly 2 further comprises a cartridge shaft 203, and the proximal end of the cartridge shaft 203 is inserted into the cartridge housing 202. The cartridge shaft 203 is movable between an initial position at the proximal end of the cartridge shaft and a terminal position at the distal end of the cartridge shaft.

Specifically, when the adapter 1 and the cartridge assembly 2 are just inserted, the cartridge shaft 203 is located at the initial position of the proximal end of the cartridge shaft, which may be an extreme position of the cartridge shaft 203 on the proximal side by a proximal limit structure 207 formed in the cartridge housing 202, but may not be an extreme position on the proximal side but only a position in which the cartridge shaft 203 is in a natural state when the adapter 1 and the cartridge assembly 2 are inserted. Since the cartridge shaft 203 is free when the adapter 1 and the cartridge assembly 2 are just inserted, the initial proximal position of the cartridge shaft is not strictly limited to a fixed position and can move slightly in the axial direction.

When the adapter 1 and the cartridge assembly 2 are just plugged together, the driving shaft 102 is in the unlocking position, the cartridge shaft 203 is located at the proximal initial position of the cartridge shaft, and the distal end of the driving shaft 102 is axially spaced from the proximal end of the cartridge shaft 203. The unlocked position may be an extreme position of the drive shaft 102 on the proximal side, or may be a position in which the drive shaft 102 is in a natural state rather than an extreme position when the adapter 1 and the cartridge assembly 2 are docked. If the drive shaft 102 and the cartridge shaft 203 form a connection when the adapter 1 and the cartridge assembly 2 are inserted and removed, the connection will provide resistance to the insertion and removal of the adapter 1 and the cartridge assembly 2, so that the drive shaft 102 and the cartridge shaft 203 will not contact each other at their respective initial positions for smoother insertion and removal of the adapter 1 and the cartridge assembly 2. The drive shaft 102 meets the cartridge shaft 203 at the cartridge shaft proximal end initial position during movement from the unlocked position toward the drive shaft distal end final position and further pushes the cartridge shaft 203 toward the cartridge shaft distal end final position.

Further, the clip cartridge assembly 2 further comprises a clip pushing mechanism, a firing mechanism, a first resetting member 204, a second resetting member 205 and a third resetting member 206. In this embodiment, the first reset member 204 is disposed between the cartridge shaft 203 and the cartridge housing 202. The proximal end of the cartridge shaft 203 has a larger diameter flange forming a recess or end surface that engages one end of the first restoring member 204. The first restoring member 204 accumulates force during the movement of the cartridge shaft 203 from the initial position at the proximal end of the cartridge shaft to the final position at the distal end of the cartridge shaft, wherein the accumulated force may be a compressive deformation force or a tensile deformation force. The second restoring member 205 may be a tension spring, a compression spring, a rubber member, or the like.

In this embodiment, the push clamp mechanism and the firing mechanism are at least partially located within the cartridge housing 202. The clip pushing mechanism is used for sending clips to the clips at the far end of the clip applier, and the firing mechanism is used for controlling the clips to be closed and opened and firing the clips when the clips are closed. The push-clamp mechanism and the firing mechanism can adopt the prior art, and the innovation point of the invention is not in the two, so the invention is not described in detail.

In the process that the clamping bin shaft 203 moves from the initial position of the near end of the clamping bin shaft to the terminal position of the far end of the clamping bin shaft, the pushing and clamping mechanism is driven to move towards the far end direction (the position when the pushing and clamping mechanism starts to act is the clamping position) until the clamp at the far end is sent to the clamp, the firing mechanism is driven to move towards the far end direction (the position when the firing mechanism starts to act is the firing position), and when the clamping bin shaft 203 is located at the terminal position of the far end of the clamping bin shaft, the clamp is closed to form firing. In summary, the position where the clip cabin shaft 203 pushes the clip pushing mechanism to start moving is located on the far side of the initial position of the proximal end of the clip cabin shaft, the position where the clip cabin shaft 203 pushes the firing mechanism to start moving is located on the far side of the position where the clip cabin shaft 203 pushes the clip pushing mechanism to start moving, and the position where the clip cabin shaft 203 stops driving the firing mechanism is located on the far end of the distal end of the clip cabin shaft.

The second reset piece 205 is arranged between the pushing and clamping mechanism and the bin clamping shaft 203, accumulates force in the process that the bin clamping shaft 203 moves from the initial position of the near end of the bin clamping shaft to the final position of the far end of the bin clamping shaft, and drives the pushing and clamping mechanism to reset in the process that the bin clamping shaft 203 moves from the final position of the far end of the bin clamping shaft to the initial position of the near end of the bin clamping shaft. The stored force may be a deformation force generated by compression or a deformation force generated by tension. The second restoring member 205 may be a tension spring, a compression spring, a rubber member, or the like. Preferably, the cartridge shaft 203 is provided with an accommodating cavity, the second resetting piece 205 is partially located in the accommodating cavity, the pushing and clamping mechanism is connected to the opening of the accommodating cavity, and the second resetting piece 205 is connected to the pushing and clamping mechanism.

The third reset piece 206 is arranged between the firing mechanism and the cartridge housing or between the firing mechanism and the cartridge shaft 203, and stores force when the cartridge shaft 203 moves from the proximal initial position of the cartridge shaft to the distal end position of the cartridge shaft, and drives the firing mechanism to reset when the cartridge shaft 203 moves from the distal end position of the cartridge shaft to the proximal initial position of the cartridge shaft. The stored force may be a deformation force generated by compression or a deformation force generated by tension. The third restoring member 206 may be a tension spring, a compression spring, a rubber member, or the like.

In this embodiment, since the driving shaft 102 is only in contact with the cartridge shaft 203, the driving shaft 102 does not provide the driving force to the cartridge shaft 203 from the distal end position of the cartridge shaft toward the proximal end position of the cartridge shaft during the movement from the distal end position of the driving shaft toward the unlocking position, but provides the driving force to the cartridge shaft 203 from the distal end position of the cartridge shaft toward the proximal end position of the cartridge shaft by the deforming forces of the first, second and third restoring members.

The driving method of the driving shaft of the clip applier comprises the following steps:

an unlocking step: upon reverse proximal movement of the drive shaft 102 from the locked position to the unlocked position, the drive shaft 102 drives the locking mechanism into engagement with the locking structure to enable insertion and extraction of the cartridge assembly 2 into and out of the adapter housing 101;

locking: during movement of the drive shaft 102 from the unlocked position to the locked position, the locking mechanism and locking structure form a fit that locks the cartridge assembly in the adapter housing 101.

The driving of the bin clamping shaft comprises the following working steps:

in the process that the driving shaft 102 moves from the unlocking position to the distal end position of the driving shaft, the driving shaft meets the clip bin shaft 203 at the proximal end initial position of the clip bin shaft and pushes the clip bin shaft 203 to move to the distal end position of the clip bin shaft, and the first reset piece, the second reset piece and the third reset piece are accumulated;

a bin clamping shaft resetting step:

when the drive shaft 102 moves from the distal end position of the drive shaft to the unlock position, the cartridge shaft is returned to the initial position of the cartridge shaft by the returning force of the first returning member, the second returning member and the third returning member and is disengaged from the cartridge shaft 203.

The above-described method associates the locking mechanism with the drive shaft 102, i.e., allows the drive shaft 102 to participate in the unlocking operation, which is simpler and easier and less prone to error than an operator manually operating the locking mechanism to unlock the locking mechanism from the locking mechanism. The setting of above-mentioned unblock position has realized that the fixed point can be inserted, but the function that the non-fixed point can not be inserted prevents the maloperation.

Example 2

On the basis of embodiment 1, this embodiment has increased the connection structure between drive shaft 102 and the clip storehouse axle 203 for clip storehouse axle 203 can be by drive shaft 102 stable, reliable pull back in the process that resets, has avoided because the first piece that resets, the second resets and the third resets the unable problem that resets of clip storehouse axle 203 that the unstable condition of the power that resets leads to of the piece leads to, and then the unable percussion once more that leads to.

Specifically, when it is desired to drive the cartridge shaft 203 in a distal direction, the drive shaft 102 travels from the unlocked position in the distal direction, meeting and making a connection, rather than an abutment, with the cartridge shaft 203 at its proximal initial position.

For example, the connection between the drive shaft 102 and the cartridge shaft 203 may be a threaded connection, and in this case, the drive means of the drive shaft 102 can selectively drive the drive shaft 102 in a bi-directional rotational movement (helical advance and retreat) and in a bi-directional linear movement, respectively. Correspondingly, the relative arrangement of the pushing element needs to counteract the rotation of the driving shaft, and only the movement of the driving shaft 102 is transmitted to the unlocking element 107, for example, the pushing element 105 is a bearing fixed on the driving shaft 102, and an end surface of an outer ring of the bearing is used for pushing against the sliding element, so that an inner ring of the pushing element 105 rotates with the driving shaft 102, and an outer ring of the pushing element 105 does not rotate but moves, so that the unlocking element 107 can be pushed; or the pushing part 105 is fixed on the driving shaft 102, and a rolling part is arranged on the surface for pushing against the unlocking part 107, and when the pushing part 105 rotates, the rolling part slides on the unlocking part 107 and pushes; or the pushing member 105 is fixed to the drive shaft by a bearing. Wherein the driving device comprises a first driving member and a second driving member rotatably fixed in the adapter housing, the first driving member is connected to the driving shaft 102, and can drive the driving shaft 102 to rotate without limiting the movement of the driving shaft 102 (the first driving member can be a gear with a non-circular hole, and the driving shaft 102 is provided with a non-circular section sleeved with the non-circular hole, for example, the hole of the gear can be a square hole, and the non-circular section on the driving shaft 102 is a square section), the second driving member has an internal threaded hole, and the internal threaded hole of the second driving member is in threaded connection with the external threaded section of the driving shaft 102, so that when the first driving member rotates and the second driving member does not move, the driving shaft 102 rotates; when the first driving member is stationary and the second driving member is rotated, the driving shaft 102 is linearly moved.

For example, the connection between the driving shaft 102 and the cartridge shaft 203 may be a magnetic connection, that is, magnets are disposed at the distal end of the driving shaft 102 and the proximal end of the cartridge shaft 203, and at this time, because the magnetic connection is not fixed, the first resetting member, the second resetting member and the third resetting member provide an auxiliary function in the process of resetting the cartridge shaft 203 toward the initial position of the proximal end of the cartridge shaft, thereby ensuring a continuous connection state between the cartridge shaft 203 and the driving shaft 102.

For example, the connection between the driving shaft 102 and the cartridge shaft 203 may be a snap connection, that is, a snap connection structure is provided at the distal end of the driving shaft 102 and the proximal end of the cartridge shaft 203, and at this time, since the ordinary snap connection itself is not a fixed connection, the first reset member, the second reset member and the third reset member provide an auxiliary function in the process of resetting the cartridge shaft 203 toward the initial position of the proximal end of the cartridge shaft, so as to ensure a continuous connection state between the cartridge shaft 203 and the driving shaft 102. In addition, the conventional snap connection can be modified, such as by reducing the size of the inner wall of the cartridge shaft housing to increase the engagement strength of the snap structure between the drive shaft 102 and the cartridge shaft 203, resulting in a lock between the drive shaft 102 and the cartridge shaft 203, wherein the lockable snap structure includes, but is not limited to, a locking bead and locking groove fit, a plug and expander sleeve fit.

On the basis of the connection, a near-end limiting structure 207 is arranged on the inner wall of the near end of the cartridge housing, the near end of the cartridge shaft 203 is stopped to prevent the cartridge shaft 203 from moving towards the near-end direction, and when the driving shaft 102 and the cartridge shaft 203 are magnetically connected and clamped, the near-end limiting structure 207 can help the driving shaft 102 and the cartridge shaft 203 to be separated.

an unlocking step: the drive shaft 102 moves from a locked position to an unlocked position, the drive locking mechanism and locking structure forming a fit that enables the cartridge assembly 2 to be inserted into and removed from the adapter housing 101;

a locking step: during movement of the drive shaft 102 from the unlocked position to the locked position, the locking mechanism and locking structure form a fit that locks the cartridge assembly 2 in the adapter housing 101.

The driving of the bin clamping shaft comprises the following working steps:

the drive shaft 102 moves from the unlocked position toward the drive shaft distal end position, meets and connects with the cartridge shaft 203 at the cartridge shaft proximal end initial position, and pushes the cartridge shaft 203 to move to the cartridge shaft distal end position;

a bin clamping shaft pulling step:

the drive shaft 102 moves from the drive shaft distal end termination position toward the unlocked position, pulling the cartridge shaft 203 back to the cartridge shaft initial position and out of engagement with the cartridge shaft 203.

Example 3

Referring to fig. 2, the difference from embodiment 1 is that the locking piece 104 is changed to a snap fixed in the mounting hole 112, the snap is not engaged with the locking groove 201 in a natural state, and when the snap is pressed down by the pressing face 113, the snap is engaged with the locking groove 201, and a spring in the snap is compressed. In the process that the pushing element 105 moves towards the proximal direction, the releasing surface 114 gradually moves to the position of the latch, and the restoring force of the spring in the latch drives the latch to the position where the latch is not engaged with the locking groove 201. Embodiments 1 to 3 are examples in which the pushing member 105 pushes the sliding member to a position that allows the locking member 104 to be disengaged from the locking structure during the movement in the proximal direction. Of course, the arrangement of the snap can also be combined with embodiment 2, which is not described herein.

Example 4

In embodiments 1 to 3, when the driving shaft 102 is located at the unlocking position, the locking element 104 is in a state of being allowed to disengage from the locking groove 201, that is, the pushing element 105 pushes the sliding element to a position allowing the locking element 104 to disengage from the locking structure during the movement in the proximal direction. However, the locking ring 108 may move to bring the locking member 104 out of the locking groove 201.

Referring to fig. 3, the main difference between the present embodiment and embodiment 1 is that the locking member 104 is a crescent-shaped locking bar with one end pivotally connected to the locking ring, and the crescent-shaped locking bar is movably disposed through the mounting hole 112. When the driving shaft 102 is located at the locking position, the free end of the crescent-shaped locking bar is inserted into the locking groove 201; during the movement of the drive shaft 102 from the locked position to the unlocked position, the crescent-shaped locking lever rotates about its pivot axis with the locking ring 108, and moves in the proximal direction with the locking ring 108, so that the free end of the crescent-shaped locking lever disengages from the locking groove 201. Thus, in this embodiment, the lock ring 108 is able to directly drive the locking member 104 out of engagement with the locking structure.

Example 5

In embodiment 1, the unlocking member 107 and the locking ring 108 together constitute a slider. In this embodiment, unlocking element 107 and locking ring 108 are integrally formed or fixedly attached as a single, moving part.

Example 6

In embodiments 1 to 5, the unlocking member 107 is fitted over the drive shaft 102 and a plurality of connecting portions 110 in the circumferential direction are connected to the locking ring 108.

Referring to fig. 4, in the present embodiment, the unlocking member 107 is a non-circular member, such as a rod-shaped member, and the plurality of unlocking members 107 are slidably coupled to the driving shaft 102. One end of the unlocking piece 107 is movably inserted into a sliding groove 109 on the driving shaft 102 in the axial direction of the driving shaft 102, and the sliding groove 109 limits the unlocking piece 107 not to be disengaged (for example, the sliding groove 109 is an inverted T-shaped groove, and the end of the unlocking piece 107 is an inverted T-shaped end). Of course, one unlocking element 107 may be provided, but a plurality of elements arranged uniformly around the drive shaft 102 may make it more stable to drive the locking ring 108.

In addition, in other embodiments, the unlocking member 107 may be supported on other structures of the adapter 1 so as to be movable in the axial direction of the drive shaft 102.

In short, the unlocking member 107 can move in both directions along the axial direction of the driving shaft 102, can abut against the abutting member 105, and can form a driving connection with the locking ring 108.

Example 7

In embodiment 1, the return driving member 106 provides the return driving force by the deforming force of the spring.

Referring to fig. 5, in the present embodiment, the reset driver 106 is a magnetic attraction pair disposed between the sliding member and a fixed structure in the adapter housing 101, for example, a female magnetic member 115 is disposed on the lock ring 108, and a male magnetic member 116 is disposed on the fixed structure of the adapter housing 101, both of which have attraction forces in the axial direction of the drive shaft 102. When the drive shaft 102 is in the locked position, the two magnetic members are attracted together, and when the drive shaft 102 moves toward the unlocked position, the two magnetic members are separated. When the drive shaft 102 is moved again to the locked position, the locking ring 108 is moved toward the fixed structure by the attraction of the magnetic members, causing the two magnetic members to be attracted again. Of course, a plurality of magnetic members may be uniformly provided on one end surface of the locking ring 108, a plurality of magnetic members may be cooperatively provided on the fixed structure, or a magnetic ring may be provided on the end surface of the locking ring 108 and/or the fixed structure to enhance the magnetic attraction force, i.e., enhance the reset driving force.

Example 8

In embodiment 1, the slide and reset driver 106 combine to form a drive assembly that drives the locking member 104 into locking engagement with the locking structure when the drive shaft 102 is in the locked position, thereby locking the cartridge assembly 2 to the stationary sleeve 103. During movement of the drive shaft 102 from the locked position to the unlocked position, the drive assembly allows the locking member 104 to disengage from the locking structure (e.g., in the case where the locking member 104 is a locking bead or a snap) or drives the locking member 104 to disengage from the locking structure (e.g., in the case where the locking member 104 is a crescent-shaped locking member 104 as in embodiment 3), allowing the cartridge assembly 2 to be inserted into and removed from the retaining sleeve 103.

In addition to the threaded connection of the driving shaft and the cartridge shaft as exemplified in embodiment 2, the driving shaft 102 is moved linearly from the locking position to the unlocking position and vice versa, and the linear movement of the driving shaft 102 in the proximal direction is converted into the proximal movement of the pushing member 105. The movement of the drive shaft 102 is not limited to linear movement.

In the present embodiment, referring to fig. 6, the driving device drives the driving shaft 102 to rotate to the unlocking position and the locking position, i.e., the unlocking position and the locking position are the angular positions at which the driving shaft 102 rotates. The driving shaft 102 is provided with a threaded section, the pushing part 105 is screwed on the threaded section, the rotation of the driving shaft 102 is converted into the linear movement of the pushing part 105, the pushing part 105 is located at the first position when the driving shaft 102 is located at the unlocking position, the pushing part 105 is located at the second position when the driving shaft 102 is located at the second position, and the first position is located at the near side of the second position.

In this embodiment, in order to enable the movement of the cartridge shaft 203 by the rotation of the driving shaft 102, the connection manner of the driving shaft 102 and the cartridge shaft 203 in embodiment 1 needs to be modified. Specifically, a connecting piece is connected at the proximal end of the cartridge shaft. The connecting piece comprises a screw rod and a nut, the driving shaft and the screw rod form detachable connection, the magnetic attraction connection and clamping connection are the simplest, the threaded connection can be used, and only the insertion and the extraction need to be rotated when the adapter and the bin clamping assembly are inserted and extracted; the nut is fixedly connected with the bin clamping shaft. Therefore, the driving shaft 102 drives the screw to rotate, the nut moves on the screw, and the bin clamping shaft moves along with the movement of the nut.

In summary, in various embodiments, the driving device can be a different mechanism for driving the driving shaft to move correspondingly, but at least the driving device can be operated or stopped to selectively drive the driving shaft to move at a proper time.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.

Claims

1. Clip applier comprising an adapter (1) and a cartridge assembly (2) detachably connected together, said adapter (1) comprising an adapter housing (101), a drive shaft (102) and a drive means, said drive shaft (102) and said drive means being connected and both located in said adapter housing (101), characterized in that,

a locking mechanism is arranged in the adapter (1), and a locking structure is arranged in the cartridge clamping assembly (2);

the driving device can selectively drive the driving shaft (102) to be in an unlocking position and a locking position;

the locking mechanism and the locking structure form a fit that locks the cartridge assembly (2) in the adapter housing (101) when the drive shaft (102) is in the locked position;

during the movement of the drive shaft (102) from the locked position to the unlocked position, driving the locking mechanism into engagement with the locking structure to enable the cartridge assembly (2) to be inserted into and extracted from the adapter housing (101);

the driving device can drive the driving shaft (102) to move between an unlocking position, a locking position and a driving shaft distal end position which are arranged from near to far;

the cartridge assembly (2) further comprises a cartridge shaft (203) movable between a cartridge shaft proximal end initial position and a cartridge shaft distal end final position;

when the drive shaft (102) is in the unlocked position, the drive shaft (102) is axially spaced from the cartridge shaft (203) in the cartridge shaft proximal end initial position;

the drive shaft (102) is connected with the clip bin shaft (203) at the proximal initial position of the clip bin shaft in the process of moving from the unlocking position to the distal end position of the drive shaft;

the drive shaft (102) pulls the cartridge shaft (203) back to the cartridge shaft proximal end initial position and out of engagement with the cartridge shaft (203) during movement from the drive shaft distal end terminal position toward the unlocked position.

2. The clip applier according to claim 1,

the locking mechanism comprises a fixing sleeve (103), a locking piece (104) and a driving assembly, wherein the fixing sleeve (103) is fixed in the adapter shell (101), the driving assembly is positioned outside the fixing sleeve (103) and inside the adapter shell (101), and the locking piece (104) is connected to the fixing sleeve (103);

when the drive shaft (102) is in the locking position, the drive assembly drives the locking piece (104) to form a locking engagement with the locking structure so that the cartridge assembly (2) is locked with the fixing sleeve (103);

in the process that the driving shaft (102) moves from the locking position to the unlocking position, the driving assembly is driven to allow or drive the locking piece (104) to be separated from the locking structure, so that the cartridge assembly (2) can be inserted into the fixing sleeve (103) and pulled out of the fixing sleeve (103).

3. The clip applier according to claim 2,

the driving shaft (102) is connected with a pushing piece (105), and the driving assembly comprises a sliding piece and a reset driving piece (106);

during movement of the drive shaft (102) from the unlocked position to the locked position, the reset drive (106) drives the slide to a position in which the locking member (104) engages the locking formation;

during the movement of the drive shaft (102) from the locking position to the unlocking position, the movement of the drive shaft (102) is converted into a movement of the pushing member (105) towards the proximal direction, and the pushing member (105) pushes the slider to a position allowing or driving the locking member (104) to disengage from the locking structure during the movement towards the proximal direction.

4. The clip applier according to claim 3,

the slider comprises an unlocking piece (107) and a locking ring (108), the locking ring (108) is movably sleeved on the outer side of the fixing sleeve (103) along the axial direction of the fixing sleeve (103), the unlocking piece (107) comprises an abutting part (111) which is in abutting contact with the abutting piece (105) in the process that the abutting piece (105) moves towards the proximal direction, and a connecting part (110) connected with the locking ring (108).

5. The clip applier according to claim 4,

the locking ring (108) is provided with a sliding groove (109) extending along the far and near directions, and the connecting part (110) is inserted into the sliding groove (109).

6. The clip applier according to claim 4,

the unlocking piece (107) is an annular piece which can be slidably sleeved on the driving shaft (102), the abutting part (111) is the part, corresponding to the abutting piece (105), of the annular piece, and the connecting part (110) is a protrusion located at the edge of the annular piece.

7. The clip applier according to claim 4,

the fixing sleeve (103) is provided with a mounting hole (112), and the locking piece (104) is positioned in the mounting hole (112);

the inner wall of the lock ring (108) is provided with a pressing surface (113) and a releasing surface (114), and the pressing surface (113) is positioned at the near side of the releasing surface (114);

the locking structure is a locking groove (201);

when the drive shaft (102) is in a locking position, the pressing surface (113) presses the locking piece (104) into the locking groove (201) to be engaged with the locking groove (201);

the release surface (114) corresponds to the locking member (104) when the drive shaft (102) is changed from the locking position to the unlocking position, and the locking member (104) is disengaged from the locking groove (201) when the cartridge assembly (2) is inserted into the adapter housing (101) and pulled out from the adapter housing (101).

8. The clip applier according to claim 4,

the driving device drives the driving shaft (102) to horizontally move to an unlocking position and a locking position, the unlocking position is located at the near side of the locking position, and the pushing piece (105) is fixed on the driving shaft (102); or

The driving device drives the driving shaft (102) to rotate to an unlocking position and a locking position, a threaded section is arranged on the driving shaft (102), the pushing piece (105) is screwed on the threaded section, the pushing piece (105) is located at a first position when the driving shaft (102) is located at the unlocking position, the pushing piece (105) is located at a second position when the driving shaft (102) is located at the second position, and the first position is located at the near side of the second position; or

The driving device drives the driving shaft (102) to rotate and move to an unlocking position and a locking position, the unlocking position is located at the near side of the locking position, the pushing piece (105) is a bearing fixed on the driving shaft (102), the end face of the outer ring of the bearing is used for pushing against the sliding piece, or the pushing piece (105) is fixed on the driving shaft (102), and a rolling piece is arranged on the surface used for pushing against the sliding piece.

9. The clip applier according to claim 3,

the return drive (106) is a spring positioned between the slide and a fixed structure in the adapter housing (101) and the direction of deformation of the spring is in the axial direction of the drive shaft (102); or

The reset drive (106) is a magnetic attraction pair disposed between the slide and a fixed structure in the adapter housing (101).

10. A method of driving a drive shaft of a clip applier, using a clip applier according to any one of claims 1-9, comprising the steps of:

an unlocking step: -the drive shaft (102) is moved from the locked position to the unlocked position, driving the locking mechanism into engagement with the locking structure to enable the cartridge assembly (2) to be inserted into and extracted from the adapter housing (101);

a locking step: the drive shaft (102) moves from the unlocked position to the locked position, the locking mechanism and locking structure forming a fit that locks the cartridge assembly (2) in the adapter housing (101).

11. The method of driving a drive shaft of a clip applier according to claim 10, further comprising the steps of:

driving the bin clamping shaft to work:

the driving shaft (102) moves from the unlocking position to the distal end position of the driving shaft, is connected with the cartridge shaft (203) at the proximal initial position of the cartridge shaft and pushes the cartridge shaft (203) to move to the distal end position of the cartridge shaft;

a bin clamping shaft pulling step:

the drive shaft (102) moves from the drive shaft distal end termination position toward the unlocked position, pulling the cartridge shaft (203) back to the cartridge shaft proximal end initial position and out of engagement with the cartridge shaft (203).