CN117860334A

CN117860334A - Surgical instrument

Info

Publication number: CN117860334A
Application number: CN202211233183.2A
Authority: CN
Inventors: 孙宝峰; 程涛; 乔志晨; 李洋
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2024-04-12

Abstract

A surgical instrument includes a shaft assembly, an end effector, an articulation mechanism, an articulation locking mechanism, and a retention assembly. The articulation mechanism includes a hinge through which the end effector is pivotally connected to the shaft assembly. The articulation locking mechanism includes a locking member having a locked position in which the locking member is engaged with the articulation member and an unlocked position in which the locking member is disengaged from the articulation member, the retention assembly is engaged with the articulation member in response to the application of a force to the articulation member that is less than a predetermined value, the retention assembly slips relative to the articulation member in response to the application of a force to the articulation member that reaches or exceeds the predetermined value, and the articulation member rotates such that the end effector rotates relative to the shaft assembly. The surgical instrument of the present invention is capable of precisely adjusting the angle of the end effector.

Description

Surgical instrument

Technical Field

The invention relates to the technical field of medical instruments, in particular to a surgical instrument, and more particularly relates to a clip applier.

Background

Surgical instruments, such as clip appliers, are medical instruments used to secure clips to tissue or blood vessels to provide hemostasis for ligation. The surgical instrument includes an end effector and a shaft assembly, and the end effector closure is configured to close a clip clamped to the end effector to clamp the clip to tissue or a blood vessel.

In applying clips to tissue or blood vessels, it is generally necessary to rotate the end effector relative to the shaft assembly to adjust the angle of the end effector so that the end effector is aligned with the site to be ligated to enable precise clip application.

For the adjustment of the angle of the end effector, the end effector is generally rotated relative to the shaft assembly to achieve this, and the end effector is locked from rotating but is maintained at a predetermined angle after the end effector is rotated relative to the shaft assembly by the predetermined angle.

In the surgical instrument of the prior art, in the process that the end effector rotates by a preset angle relative to the shaft assembly and before the rotational movement of the end effector is locked, the end effector is difficult to stably maintain at the preset angle until the rotational movement of the end effector is locked, so that the end effector is swayed to change the rotational angle of the end effector, which results in inaccurate angle adjustment of the end effector.

Based on the foregoing, there is a need for improvements over existing surgical instruments.

Disclosure of Invention

In view of the shortcomings of the prior art, the present invention is directed to a surgical instrument that solves the technical problem in the prior art that it is difficult for an end effector of the surgical instrument to remain at a preset angle until locked at the preset angle after rotating the preset angle, resulting in shaking of the end effector to change its angle, thereby making the angle adjustment of the end effector inaccurate.

The invention is realized by the following technical scheme: a surgical instrument, comprising:

a shaft assembly;

an end effector;

an articulation mechanism including a hinge through which the end effector is pivotally connected to the shaft assembly;

a joint locking mechanism including a locking member having a locking position in which the locking member engages with the hinge member to lock the hinge member and an unlocking position in which the locking member disengages from the hinge member to unlock the hinge member;

a retaining assembly that engages the articulation member to retain the position of the articulation member in response to the application of a force to the articulation member that is less than a preset value or no force when the locking member is in the unlocked position, the retaining assembly slipping relative to the articulation member to release the retention of the position of the articulation member in response to the application of a force to the articulation member that reaches or exceeds the preset value, the articulation member rotating causing the end effector to rotate relative to the shaft assembly.

Further, the hinge has a plurality of limit slots, and the retaining assembly has a retaining end that engages one of the limit slots to maintain the position of the hinge.

Further, the retaining assembly includes a resilient member and a stop member, the stop member being coupled to the resilient member, a distal end of the stop member forming a bearing end of the retaining assembly, the resilient member biasing the stop member toward the hinge member to engage the distal end of the stop member with one of the limit slots.

Further, the hinge member has a plurality of limit grooves;

in the locked position, the locking member engages at least one of the limit slots to lock the hinge member;

in the unlocked position, the locking member disengages the limit slot to which it is engaged to unlock the hinge member.

Further, when the locking piece is located at the locking position, the abutting end of the holding assembly and the locking piece are respectively engaged with different limiting grooves.

Further, the surgical instrument further comprises a clip cartridge comprising a clip and a clip feed assembly that moves to urge the clip of the clip cartridge into the end effector in response to applying a force to the clip feed assembly.

Further, the cartridge is detachably disposed to the hinge.

Further, the surgical instrument further comprises an actuation mechanism comprising an actuation member having a first motion and a second motion;

The locking member being in a locked position, the locking member being moved from the locked position to the unlocked position in response to the first movement of the actuating member;

the hinge member is configured to rotate the end effector relative to the shaft assembly in response to the second movement of the actuating member when the locking member is in the unlocked position.

Further, the joint locking mechanism further comprises a first reset piece, the first reset piece stores first energy in the process that the locking piece moves from the locking position to the unlocking position, the first energy is released, and the locking piece moves to the locking position under the action of the first reset piece.

Further, the articulation mechanism further comprises an articulation drive assembly for driving the articulation member in rotation;

the joint driving assembly comprises a transmission assembly and a rod assembly, wherein the transmission assembly comprises a first transmission piece and a second transmission piece meshed with the first transmission piece; one end of the rod assembly is connected with the second transmission piece, and the other end of the rod assembly is pivotally connected with the hinge piece;

In response to the actuation member performing the second movement, the actuation member drives the first transmission member in rotation such that the second transmission member moves axially to drive the rod assembly in motion, thereby rotating the articulation member and thus the end effector in rotation relative to the shaft assembly.

Further, the articulation has an initial position and a plurality of rotational positions, the end effector defining a first longitudinal axis and the shaft assembly defining a second longitudinal axis;

the first longitudinal axis is parallel to the second longitudinal axis when the hinge is in the initial position;

the first longitudinal axis is at an angle to the second longitudinal axis when the hinge is in one of the rotational positions.

Further, the clip applier further comprises a positioning assembly, the positioning assembly is provided with an abutting end, the first transmission piece is provided with a positioning groove, when the hinge piece is located at the initial position, the abutting end of the positioning assembly is engaged with the positioning groove, and when the hinge piece is located at one of the rotating positions, the abutting end of the positioning assembly is separated from the positioning groove.

Compared with the prior art, the invention has the beneficial effects that: the surgical instrument of the present invention can stably maintain the end effector at a preset angle until the rotational movement thereof is locked in a process in which the end effector is rotated by the preset angle with respect to the shaft assembly and before the rotational movement of the end effector is locked, thereby enabling precise adjustment of the angle of the end effector.

Drawings

FIG. 1 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1 with the end effector rotated a predetermined angle relative to the shaft assembly;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a schematic view of a second angle of a surgical instrument according to an embodiment of the present invention;

FIG. 5 is a first angular cross-sectional view of a surgical instrument according to an embodiment of the present invention, wherein only a portion of the main shaft is shown;

FIG. 6 is a first cross-sectional view of a cartridge provided in accordance with an embodiment of the present invention, primarily to illustrate the internal structure of the cartridge;

FIG. 7 is a second cross-sectional view of the cartridge provided in accordance with the embodiments of the present invention, primarily to illustrate the snap-fit arrangement;

FIG. 8 is a schematic view of a first angle of a hinge according to an embodiment of the present invention, mainly for illustrating a snap-fit structure;

FIG. 9 is a schematic view of a stack of clips of a cartridge provided in accordance with an embodiment of the present invention;

FIG. 10A is a schematic view of the structure of the biasing assembly provided in accordance with an embodiment of the present invention, wherein the push plate is not shown;

FIG. 10B is a schematic view of the torsion spring provided in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of a push plate according to an embodiment of the present invention;

FIG. 12 is a second angular cross-sectional view of a surgical instrument according to an embodiment of the present invention, wherein the clamping bar does not perform a clamping action;

FIG. 13 is a second angular cross-sectional view of a surgical instrument according to an embodiment of the present invention, wherein the clamping bar is used to move the clamp to the ready position;

FIG. 14 is a schematic view of a third angle of a surgical instrument according to an embodiment of the present invention;

FIG. 15 is a schematic view of a second angle of articulation provided in an embodiment of the present invention;

FIG. 16 is a schematic view of a fourth angle of a surgical instrument according to an embodiment of the present invention;

FIG. 17 is a schematic view of a third angle of a surgical instrument provided in accordance with an embodiment of the present invention, primarily to illustrate a retention assembly;

FIG. 18 is a schematic view of a fifth angle of a surgical instrument according to an embodiment of the present invention, primarily to illustrate the articulation mechanism, articulation locking mechanism, and actuation mechanism;

FIG. 19 is a sixth angular schematic view of a surgical instrument provided in accordance with an embodiment of the invention, primarily to illustrate the articulation mechanism, articulation locking mechanism, and actuation mechanism;

FIG. 20 is a schematic view of a seventh angle of a surgical instrument according to an embodiment of the present invention, primarily to illustrate an articulation mechanism, an articulation locking mechanism, and an actuation mechanism;

FIG. 21 is a schematic view of a surgical instrument according to an eighth embodiment of the present invention, primarily to illustrate the articulation mechanism, articulation locking mechanism, and actuation mechanism;

FIG. 22 is a schematic view of an actuator provided in accordance with an embodiment of the present invention;

FIG. 23 is a schematic illustration of a ninth angle of a surgical instrument according to an embodiment of the present invention;

FIG. 24 is a schematic view of a tenth angle of a surgical instrument according to an embodiment of the present invention;

FIG. 25 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention, wherein the locking member is in the locked position and the end effector is not rotated;

FIG. 26 is a schematic view of a third angle of a surgical instrument according to an embodiment of the present invention, wherein the locking member is in the locked position and the end effector is not rotated;

FIG. 27 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention with a lock in an unlocked position and an end effector rotated a predetermined angle relative to a shaft assembly;

FIG. 28 is a schematic view of a third angle of a surgical instrument according to an embodiment of the present invention with the locking member in the unlocked position and the end effector rotated a predetermined angle relative to the shaft assembly;

FIG. 29 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention with a locking member in a locked position and an end effector rotated a predetermined angle relative to a shaft assembly;

FIG. 30 is a schematic view of a third angle of a surgical instrument according to an embodiment of the present invention with the locking member in the locked position and the end effector rotated a predetermined angle relative to the shaft assembly;

FIG. 31 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention, primarily to illustrate the manner in which an articulation mechanism is rotationally engaged with an end effector;

FIG. 32 is a schematic view of a positioning assembly according to an embodiment of the present invention;

FIG. 33 is a cross-sectional view of a positioning assembly provided in accordance with an embodiment of the present invention;

FIG. 34 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention, wherein a positioning assembly is engaged with a positioning slot;

FIG. 35 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention, wherein the positioning assembly is disengaged from the positioning slot;

FIG. 36 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention, primarily for the purpose of illustrating a transmission mechanism;

FIG. 37 is a schematic view of a first angle of a surgical instrument according to an embodiment of the present invention, primarily for the purpose of illustrating a switching mechanism;

FIG. 38 is a schematic view of a surgical instrument according to an eleventh embodiment of the present invention;

FIG. 39 is a schematic view of the engagement of a wrench with a path switch member and a guide pivot member according to an embodiment of the present invention;

FIG. 40 is a schematic illustration of the engagement of a wrench with a guide pivot according to an embodiment of the present invention;

FIG. 41 is a schematic view of a guide pivot provided in accordance with an embodiment of the present invention;

FIG. 42 is a schematic view of a guide channel according to an embodiment of the present invention;

FIG. 43 is a schematic view of the wrench engaging with a path switch member according to an embodiment of the present invention;

FIG. 44 is another angle of FIG. 43;

FIG. 45 is a schematic view of a path switch member according to an embodiment of the present invention;

FIG. 46 is a schematic view of another angle of the path switch member according to an embodiment of the present invention;

FIG. 47 is a schematic view of a first head housing provided in accordance with an embodiment of the present invention;

FIG. 48A is a state diagram of the path switch member with the actuator member in the open position;

FIG. 48B is a state diagram of the path switch member prior to movement of the actuator member from the open position to the closed position;

FIG. 49A is a state diagram of the path switch member with the actuator member in the closed position;

FIG. 49B is a state diagram of the path switch member prior to the actuator resetting movement and reaching the open position;

reference numerals of the above drawings:

1-an end effector; 2-a first longitudinal axis; 3-a first jawarm; 4-a second jawarm; 5-a first elastic element; 6-a shaft assembly; 7-a second longitudinal axis; 8-a main shaft; 9-a first rotating shaft; 10-stop surface; 11-a sleeve; 12-closing the tube; 13-opening; 14-a pivot; 15-a second rotating shaft; 16-a third rotating shaft; 17-a first pivot axis; 19-a handle housing; 20-a first head housing; 21-a second head housing; 22-wrenches; 23-a wrench body; 24-a grip; 25-pushing claws; 26-a pivoting end; 27-pushing rod; 28-an elastic rod; 29-pushing clamping blocks; 30-a clip; 31-a first clip; 32-a second clip; 33-a third clip; 34-pressing plate; 35-a third pivot axis; 36-torsion spring; 37-first torsion arm; 38-a second torsion arm; 39-rotating shaft; 40-pushing plate; 41-a clamping part; 42-clamping the bin; 43-first male clasp; 44-a second male clasp; 45-a first cavity; 46-a second cavity; 47-hinge; 48-a first female buckle; 49-a second female buckle; 50-connecting part; 51-channel; 52-a limit groove; 53-a moving member; 54-rotating member; 55-a first element; 56-a second element; 57-a first pivot axis; 58-a first reset element; 59-a first tank; 60-stop wall; 61-a second tank; 62-locking member; 63-a stop; 64-a first transmission member; 65-drive ring; 66-first teeth; 67-a second pivot axis; 68-a slider; 69-positioning grooves; 70-a second transmission member; 71-a second tooth; 72-limiting teeth; 73-a first rod body; 74-a fourth spindle; 75-a fifth rotating shaft; 76-a second rod body; 77-an actuator; 78-a first member; 79-slide groove; 80-pushing surface; 81-a second member; 82-a guide channel; 83-main channel; 84-slave channel; 85-a first wall; 86-blocking wall; 87-a second wall; 88-a guide wall; 89-starting point; 90-a first stop point; 91-a second stop point; 92-a third stop point; 93-end point; 94-path switching member; 95-a pivot; 96-a first trigger; 97-a second trigger; 98-an execution unit; 99-baffle; 100-fourth pin shafts; 101-first guide ribs; 102-a first guiding ramp; 103-second guide ribs; 104-a second guiding ramp; 105-convex; 106-a first recess; 107-a second recess; 108-an operation part; 109-a second reset member; 110-pushing piece; 111-a holding assembly; 112-a first elastic member; 113-a first stop; 114-a positioning assembly; 115-a cylinder; 116-a second elastic member; 117-a second stop; 118-a first driver; 119-an annular flange; 120-a second driver; 121-a base; 122-a first kidney-shaped aperture; 123-guide posts; 124-column; 125-stop; 126-clamping blocks; 127-a second elastic element; 129-a first guide surface; 130-a second guiding surface; 131-a second clutch; 132-a third reset element; 133-a fourth reset member; 134-guide pivot; 135-first stop; 136-a first guide surface; 137-first stop face; 138-a second stop; 139-a second guide surface; 140-a second stop surface; 141-a third stop; 142-a third guide surface; 143-a third stop surface; 144-a pivoting part; 145-a third pin; 146-guide; 147-force receiving part; 148-a bias spring; 149-guide; 150-pushing part.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It will be appreciated that the terms "proximal", "posterior" and "distal", "anterior" are used herein with respect to a clinician manipulating a handle assembly of a surgical instrument. The terms "proximal", "posterior" and "anterior" refer to the portion proximal to the clinician, and the terms "distal" and "anterior" refer to the portion distal to the clinician. I.e., the handle assembly is proximal and the end effector is distal, e.g., the proximal end of a component represents an end relatively close to the handle assembly and the distal end represents an end relatively close to the end effector. However, surgical instruments are used in many orientations and positions, and these terms of relative positioning are not intended to be limiting and absolute.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, movably connected, or integrated, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two elements or interaction relationship between the two elements such as abutting. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that, when the terms "connected" and "connected" are used in the meanings defined by the corresponding terms, only the cases where the terms are clearly required are excluded, and other possible cases are not excluded, such as "detachably connected" means detachably connected, not including being integrated, but movable connection and the like are not excluded.

The surgical instrument of the present invention will be explained and illustrated with reference to an applicator clamp.

The term "axial" refers to the length direction of the shaft assembly 6.

Referring to fig. 1-3, the present embodiment provides a surgical instrument, and in particular, a clip applier comprising an operating assembly, a shaft assembly 6 extending from the operating assembly, an end effector 1 disposed at a distal end of the shaft assembly 6, a cartridge 42, an articulation mechanism, an articulation locking mechanism, and a retaining assembly 111.

The operating assembly includes a housing and a wrench 22, the wrench 22 being movably coupled to the housing. The housing is divided into a head housing and a handle housing 19 extending from the underside of the head housing in positional relationship. The handle housing 19 and the wrench 22 form a handle assembly, the operator can grasp the handle housing 19 with one hand and the fingers pull the wrench 22 so that the wrench 22 moves relative to the handle housing 19, thereby causing the surgical instrument to perform a clamping or applying motion (end effector 1 closing motion). Those skilled in the art will readily appreciate that while wrench 22 is shown and described, the surgical instruments disclosed herein may not necessarily include wrench 22, e.g., the surgical instruments may be motorized and may include actuation buttons for actuating motors to control the clamping and stapling actions of the surgical instruments.

The articulation mechanism includes a hinge 47. The end effector 1 is pivotally connected to the shaft assembly 6 by a hinge 47 to enable rotational movement of the end effector 1 relative to the shaft assembly 6. Referring to fig. 1-2, the end effector 1 defines a first longitudinal axis 2 and the shaft assembly 6 defines a second longitudinal axis 7. The hinge 47 is rotatable relative to the shaft assembly 2 to rotate the end effector 1 relative to the shaft assembly 6 about the first pivot axis 17 such that the first longitudinal axis 2 of the end effector 1 is parallel or angled to the second longitudinal axis 7 of the shaft assembly 6, thereby facilitating adjustment of the angle of the end effector 1 by a practitioner to accommodate clamping needs and ease of use.

The hinge 47 has an initial position and a plurality of rotational positions. The first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6 when the articulation 47 is in the initial position. The first longitudinal axis 2 of the end effector 1 is at an angle to the second longitudinal axis 7 of the shaft assembly 6 when the articulation is in the rotated position. By rotating the articulation 47 to different rotational positions, the end effector 1 can be rotated through different angles relative to the shaft assembly 2.

The articulation locking mechanism includes a locking member 62, the locking member 62 being capable of locking rotational movement of the end effector. Specifically: the lock 62 has a locked position and an unlocked position. In the locked position, the locking member 62 engages the hinge member 47 to lock the hinge member 47 such that the hinge member 47 cannot rotate, and thus the rotational movement of the end effector 1 is locked, the end effector 1 cannot move rotationally about the first pivot axis 17 relative to the shaft assembly 6. In the unlocked position, the locking member 62 is disengaged from the hinge member 47 to unlock the hinge member 47 so that the hinge member 47 can rotate and the end effector 1 can move rotationally about the first pivot axis 17 relative to the shaft assembly 6.

When it is desired to adjust the angle of the end effector 1, the lock 62 is moved to the unlocked position to unlock the rotational movement of the end effector 1. With the locking member 62 in the unlocked position, the retaining assembly 111 engages the articulation member 47 to retain the position of the articulation member 47 in response to the application of a force to the articulation member 47 that is less than a preset value or no force, and the retaining assembly 111 slips relative to the articulation member 47 to release the retention of the position of the articulation member 47 in response to the application of a force to the articulation member 47 that reaches or exceeds a preset value, the articulation member 47 rotates to rotate the end effector 1 relative to the shaft assembly 2. That is, when the locking member 62 is in the unlocked position, the hinge member 47 can be driven to rotate only by applying a force to the hinge member 47 that reaches or exceeds a preset value, and in addition, the holding assembly 111 holds the position of the hinge member 47. Applying a force to the articulation 47 means that an operator or motor applies a force to the articulation 47 via the articulation drive assembly in order to rotate the articulation.

Specifically, when a force reaching or exceeding a preset value is applied to the articulation member 47 such that the articulation member 47 is rotated to one of the rotational positions, the end effector 1 is rotated by a preset angle relative to the shaft assembly 2, satisfying the use requirement, at which time it is not necessary to rotate the articulation member 47 any more, but rather the articulation member 47 is maintained in the current rotational position such that the end effector 1 is maintained at the preset angle until the articulation member 47 is locked by the locking member 62 such that rotational movement of the end effector 1 is locked.

After the end effector 1 is rotated a predetermined angle relative to the shaft assembly 2 to meet the user's requirements, no force is applied to the articulation member 47 to a predetermined value or more so that the retention assembly 111 can engage the articulation member 47 to retain the position of the articulation member 47, whereby the retention assembly 111 can retain the articulation member 47 in the current rotational position until the locking member 62 is moved to the locked position to lock the articulation member 47 during the movement of the locking member 62 to the locked position. Thus, in the process that the end effector 1 rotates a preset angle relative to the shaft assembly 2 and before the rotational movement of the end effector 1 is locked, the end effector 1 can be stably maintained at the preset angle until the rotational movement thereof is locked, and the end effector 1 is prevented from shaking to change the angle thereof, thereby enabling the angular adjustment of the end effector 1 to be more accurate.

The articulation mechanism also includes an articulation drive assembly for driving articulation 47 in rotation. In the unlocked position, the articulation drive assembly is capable of driving rotation of the articulation 47 such that the end effector 1 rotates about the first pivot axis 17 relative to the shaft assembly 6. The articulation locking mechanism also includes a lock drive assembly for driving the movement of the locking member 62.

Referring to fig. 1-3, the applicator further includes an actuation mechanism including an actuator 77, the actuator 77 being capable of driving the lock drive assembly and the articulation drive assembly in motion. Specifically:

when the locking member 62 is in the locked position, the actuating member 77 moves in a first motion to drive the locking drive assembly such that the locking drive assembly drives the locking member 62 from the locked position to the unlocked position.

With the locking member 62 in the unlocked position, the locking member 62 is disengaged from the hinge member 47, the hinge member 47 is capable of rotating, the locking member 62 is maintained in the unlocked position, and the actuator member 77 is moved in a second motion to drive the articulation drive assembly such that the articulation drive assembly drives rotation of the hinge member 47 and thereby rotates the end effector 1 relative to the shaft assembly 6 about the first pivot axis 17.

In this embodiment, after the first movement of the actuating member 77 causes the locking member 62 to be in the unlocking position, the second movement of the actuating member 77 causes the end effector 1 to rotate by a preset angle relative to the shaft assembly 6, that is, only one time of unlocking is needed in the process of adjusting the angle of the end effector 1, so that the end effector 1 can rotate by the preset angle relative to the shaft assembly 6 in the unlocking state to meet the use requirement.

When the actuating member 77 does the first movement, the end effector 1 does not rotate, the actuating member 77 does the second movement to enable the end effector 1 to rotate relative to the rod body assembly 6, the second movement of the actuating member 77 is associated with the rotation of the end effector 1, the movement amount of the second movement of the actuating member 77 can intuitively indicate the rotation angle of the end effector 1, and an operator can expect the rotation angle of the end effector 1 through the second movement of the actuating member 77, so that the operator can conveniently adjust the rotation angle of the end effector 1, and the convenience of operation is improved.

In response to the actuator 77 being moved a second time, the articulation drive assembly applies a force to the articulation 47 that reaches or exceeds a predetermined value to drive the articulation 47 to rotate, and when the articulation 47 is rotated to one of the rotational positions, the end effector 1 is rotated a predetermined angle relative to the shaft assembly 2, satisfying a user demand, at which time the actuator is no longer moved a second time, the articulation drive assembly no longer applies a force to the articulation 47 that reaches or exceeds a predetermined value, and the articulation 47 remains in the current rotational position under the influence of the retention assembly 111 to retain the end effector 1 at the predetermined angle until the articulation 47 is locked by the locking member 62 such that rotational movement of the end effector 1 is locked.

Referring to fig. 14-17, the hinge 47 has a plurality of limiting slots 52. Each of the limiting grooves 52 is adapted to the distal end of the locking member 62, the distal end of the locking member 62 being capable of engaging at least one of the limiting grooves 52. Optionally, the distal end of the locking element 62 is toothed tipped to facilitate insertion of the distal end of the locking element 62 into the restraint slot 52. The locking member 62 engages the hinge member 47, i.e., the distal end of the locking member 62 is inserted into the retaining groove 52 of the hinge member 47. The locking member 62 is disengaged from the hinge member 47, i.e., the distal end of the locking member 62 is disengaged from the retaining groove 52 of the hinge member 47.

The distal end of the locking member 62 engages with at least one of the retaining grooves 52 to lock the hinge member 47 when the locking member 62 is in the locked position, and the distal end of the locking member 62 disengages from the retaining groove 52 in which it is positioned to unlock the hinge member 47 when the locking member 62 is in the unlocked position, so that the hinge member 47 can rotate.

Referring to fig. 17, the retaining assembly 111 has a holding end. With the locking member 62 in the unlocked position, the abutment end of the retaining assembly 111 engages the retaining groove 52 of the hinge member 47 to maintain the position of the hinge member 47 in response to the application of a force to the hinge member 47 that is less than a preset value or no force. The retaining assembly 111 engages the hinge 111, i.e., the abutment end of the retaining assembly 111 is received in the limit slot 52 of the hinge 47.

With the locking member 62 in the unlocked position, the hinge member 47 continues to rotate in response to the second movement of the actuating member 77, the hinge member 47 being forced to or beyond a predetermined value, and the retaining assembly 111 slides relative to the hinge member 47 to release the retention of the position of the hinge member 47. The retaining component 111 slides relative to the hinge piece 47, that is, the abutting end of the retaining component 111 cannot be stably engaged with the limiting groove 52 of the hinge piece 47, when the hinge piece 47 continuously rotates, the abutting end of the retaining component 111 can be separated from the limiting groove 52 where the abutting end is located and enter the next limiting groove 52, and then separated from the next limiting groove 52, so that the sliding and sliding between the hinge piece 47 and the retaining component 111 can be continued. And when the operator releases the actuator 77, the abutment end of the retaining assembly 111 can engage one of the limit slots 52 of the hinge 47 to maintain the position of the hinge 47.

As described above, the hinge 47 has an initial position and a plurality of rotational positions. When the locking member is in the unlocked position, the hinge member 47 rotates between the initial position and the plurality of rotational positions in response to the second movement of the actuating member, the locking member 62 is sequentially aligned with different ones of the retaining grooves 52 as the hinge member 47 rotates, the abutment end of the retaining assembly 111 is also engaged with different ones of the retaining grooves 52, and the retaining groove 52 with which the abutment end of the locking member 62 is aligned and the retaining groove 52 with which the abutment end of the retaining assembly 111 is engaged are different ones of the retaining grooves. Specifically:

The locking member 62 is aligned with one of the limiting grooves 52 when the hinge member 47 is in one of the rotational positions, and the locking member 62 is aligned with the other limiting groove 52 when the hinge member 47 is in the other rotational position.

The abutment end of the retaining assembly 111 engages one of the limiting grooves 52 when the hinge 47 is in one of the rotational positions, and the abutment end of the retaining assembly 111 engages the other limiting groove 52 when the hinge 47 is in the other rotational position.

When the locking member 62 is in the locked position, the locking member 62 engages the aligned limiting groove 52 and the abutment end of the retaining assembly 111 engages the other limiting groove 52.

Referring to fig. 17, the plurality of detents 52 are circumferentially arranged such that, after the hinge 47 is rotated through an angle, the distal end of the locking member 62 is still aligned with one of the detents 52 for insertion into that detent 52, while the abutment end of the retaining assembly 111 is still engaged with the other detent 52.

Referring to fig. 4-5, the cartridge 42 is removably mounted to the hinge 47. In particular, referring to fig. 7-8, the cartridge 42 is coupled to the hinge 47 via a snap-fit arrangement. The distal end of the hinge 47 is provided with a first female clasp 48 and the proximal end of the hinge 47 is provided with a second female clasp 49. The distal end of the cartridge 42 is provided with a first male buckle 43 that mates with a first female buckle 48. The proximal end of the cartridge 42 is provided with a second male clasp 44 that mates with a second female clasp 49. The first male buckle 43 is detachably buckled with the first female buckle 48, and the second male buckle 44 is detachably buckled with the second female buckle 49, so that the clip bin 42 is detachably connected with the hinge member 47. Thus, upon rotation of the articulation member 47 in response to the second movement of the actuator 77, the cartridge 42 is able to rotate simultaneously with the end effector 1 as the articulation member 47 rotates as the end effector 1 rotates relative to the shaft assembly 6 about the first pivot axis 17.

Referring to fig. 5-6, 12-13, the clip cartridge 42 has a clip 30, the clip 30 being capable of being applied to tissue or a blood vessel by the end effector 1. The surgical instrument further includes a clip feeding assembly that is configured to move distally or proximally (see more particularly below), the clip feeding assembly moving distally to push the clips 30 of the cartridge 42 against the end effector 1, and the clip feeding assembly moving proximally to reset after completion of clip feeding. When the clip feeding assembly pushes the clip 30 against the end effector 1, the end effector 1 closes such that the clip 30 is applied to tissue or a blood vessel. When the clip 30 of the cartridge 42 is depleted, the surgical instrument can be used continuously by only removing the cartridge 42 from the hinge 47 and mounting a new cartridge 42 with the clip 30 to the hinge 47, thereby enabling reuse of the surgical instrument and saving costs.

Referring to fig. 6, 12-13, the cartridge 42 in this embodiment includes at least two clips 30, the cartridge 42 having a cavity to receive the clips 30, the clips 30 forming a stack within the cavity. The number of clips 30 of the cartridge 42 is adjustable, the number of clips 30 does not affect the proper use of the surgical instrument, and the number of clips 30 can be adjusted according to the needs of the user during actual use. During a surgical procedure, a sequential clip application procedure typically applies three clips 30 to tissue or blood vessels, so the clip cartridge 42 in this embodiment includes three clips 30.

The clamping cavity of the clamping bin 42 comprises a first cavity 45 and a second cavity 46. Taking the placement direction and angle of the surgical instrument in fig. 12 as a reference, the first cavity 45 is disposed above the second cavity 46, and the first cavity 45 communicates with the second cavity 46. The proximal end of the second cavity 46 intersects the proximal end face of the cartridge 42 to form an inlet of the second cavity 46 and the distal end of the second cavity 46 intersects the distal end face of the cartridge 42 to form an outlet of the second cavity 46.

The three clips 30 of the clip magazine 42 are, in order from top to bottom, a clip 31, a clip 32 and a clip 33. The clips 31, 32 are disposed in the first cavity 45. The clip 33 is disposed in the second cavity 46. The cartridge 42 also includes a biasing assembly that is capable of applying a generally downward force (with reference to fig. 12) to the upper end surface of the clip 31.

Referring to fig. 12-14 and 37, the clip feeding assembly in this embodiment includes a push rod 27, an elastic rod 28 and a clip pushing block 29, wherein a proximal end of the elastic rod 28 is connected to the push rod 27, a distal end of the elastic rod 28 is connected to the clip pushing block 29, and the elastic rod 28 is formed by laminating a plurality of metal sheets, so that the elastic rod 28 has elasticity and can be bent and deformed. The shaft assembly 6 includes a main shaft 8, the main shaft 8 being provided with a first accommodation groove extending in an axial direction, in which a push rod 27 and a part of an elastic rod 28 are accommodated and movable. When the clip feeding assembly does not push the clip 30 against the end effector 1, the push block 29 at the distal end of the resilient lever 28 extends into the second cavity 46 of the clip cartridge 42 from the entrance of the second cavity 46. When the end effector 1 and the cartridge 42 are rotated relative to the shaft assembly 6, the resilient rod 28 flexes under the influence of the end effector 1 and the cartridge 42 to accommodate the rotation of the end effector 1 and the cartridge 42.

Referring to fig. 17, a holding assembly 111 is provided at the distal end of the spindle 8. When the locking member 62 is in the unlocked position, the operator manipulates the actuator member 77 to cause a second movement of the actuator member 77, and after the articulation drive assembly applies a force to the articulation member that reaches or exceeds a predetermined value to drive the articulation member 47 to one of the rotational positions, the operator releases the actuator member 77 and the retaining assembly 111 retains the articulation member 47 in its current rotational position until the locking member 62 is moved to the locked position to lock the articulation member 47. Thus, the swing of the end effector 1 caused by the hinge 47 being locked due to some interference factors such as the mis-touching of the end effector 1, the bending deformation of the elastic rod 28, etc. can be avoided, so that the end effector 1 can be stably maintained at the preset angle until the hinge 47 is locked in the process that the end effector 1 is rotated by the preset angle with respect to the shaft assembly 2 and the hinge 47 is locked.

Referring to fig. 17, the holding assembly 111 in this embodiment includes a first elastic member 112 and a first stopper 113. The main shaft 8 is provided with a fourth accommodating groove, the first elastic piece 112 is positioned in the fourth accommodating groove, one end of the first elastic piece 112 is connected with the main shaft 8, and the other end of the first elastic piece 112 is connected with the first stop piece 113. The first stopper 113 is fitted with the limiting groove 52 of the hinge 47, and the first elastic member 112 biases the first stopper 113 toward the hinge 47 such that the tip of the first stopper 113 is engaged with the limiting groove 52 of the hinge 47. When the hinge member 47 rotates, the hinge member 47 applies a force to the first stopper 113, so that the first stopper 113 is disengaged from the limiting groove 52 against the biasing force of the elastic member. During the continued rotation of the hinge 47, the end of the first stop 113 will disengage one of the retaining grooves 52, then engage the other retaining groove 52, and then disengage the retaining groove 52, which continues as a slip-on between the hinge 47 and the retaining assembly 111. The distal end of the first stop 113 constitutes the abutment end of the holding assembly 111.

The preset value mentioned above is a value set by a person skilled in the art according to the design requirement, and is not a fixed value, as long as the preset value ensures that the holding component 111 can overcome the elastic force of the elastic rod 28 to stably hold the hinge member 47 in its current rotation position after the hinge member 47 rotates by a preset angle and before the locking member 62 moves to the locking position. Specifically, one skilled in the art can adjust the specific value of the preset value according to the spring force of the spring rod 28 under various bending degrees, the spring force of the spring member 112 in the holding assembly 111, the friction force between the first stopper 113 and the hinge member 47 in the holding assembly 111, and the like.

Referring to fig. 4-5, 15, the distal end of the hinge 47 has a connection 50. The end effector 1 includes a first jawarm 3 and a second jawarm 4, each of the first and second jawarms 3, 4 being pivotally connected to the link 50 such that the first and second jawarms 3, 4 can be moved toward and away from each other relative to the hinge 47 to close or open the end effector 1. The connecting portion 50 has a channel 51, a distal end of the channel 51 leads between the first jawarm 3 and the second jawarm 4, a proximal end of the channel 51 communicates with an outlet of the second cavity 46 of the cartridge 42, and when the clip feeding assembly moves distally, the push block 29 pushes the clip 30 of the cartridge 42 to enter between the first jawarm 3 and the second jawarm 4 via the channel 51 and to be supported between the first jawarm 3 and the second jawarm 4. By manipulating the wrench 22 of the operating assembly, the first and second jawarms 3, 4 are closed, thereby closing the clip 30 between the first and second jawarms 3, 4 for application to tissue or blood vessels. The channel 51 restricts the movement space of the clip 30 during the movement of the clip 30 from the cavity of the cartridge 42 to the end effector 1, so that the clip 30 can move along a predetermined trajectory between the first jawarm 3 and the second jawarm 4 without being deflected during the movement and cannot move between the first jawarm 3 and the second jawarm 4.

12-13, after the clip feeding assembly is moved distally (i.e., forward) to push the clip 33 against the end effector 1 and the clip feeding assembly is moved proximally to effect repositioning, both the clip 31 and the clip 32 are moved downwardly under the influence of the biasing assembly such that the clip 32 enters the second cavity 46 to enable clip re-application. It should be noted that, after the clip feeding assembly pushes the clip 33 against the end effector 1 and before the clip feeding assembly moves to achieve the reset, the clip feeding assembly abuts against the bottom of the clip 32 (see description below in detail), so that neither the clip 31 nor the clip 32 moves downward, but when the clip feeding assembly moves proximally (i.e., backward) to achieve the reset, the clip 31 and the clip 32 can move downward under the action of the biasing assembly. The downward movement of clip 31 and clip 32 under the bias of the biasing assembly is referenced to the angle of placement of the surgical instrument in fig. 12. Clip 31 and clip 32 can still move into second cavity 46 under the influence of the biasing assembly as the angle of placement of the surgical instrument changes.

Referring to fig. 6, 9-11, the biasing assembly includes a pressure plate 34, a torsion spring 36, a rotational shaft 39, and a push plate 40.

Both ends of the rotation shaft 39 are fixed to the clip magazine 42, and the pressing plate 34 is provided at the upper end of the clip 31. One end of the pressing plate 34 is connected with the pushing plate 40, and the opposite end of the pressing plate 34 is annularly sleeved on the rotating shaft 39, so that the pressing plate 34 can rotate around the rotating shaft 39. The push plate 40 is capable of acting on the upper end surface of the clip 31 (see fig. 9), and the push plate 40 is connected to the opposite end of the platen 34 to apply a force to the clip 31 under the action of the platen 34. Specifically, the surface of the end of the platen 34 to which the push plate 40 is attached has an arcuate projection that forms the third pivot axis 35. The push plate 40 has a clamping portion 41, the clamping portion 41 is engaged with the third pivot shaft 35, the clamping portion 41 has an arcuate surface in form fit with the third pivot shaft 35, such that the push plate 40 is rotatably connected with the platen 34, and the push plate 40 is rotatable about the third pivot shaft 35 relative to the platen 34.

The torsion spring 36 is also sleeved on the rotating shaft 39, and the torsion spring 36 is provided with a first torsion arm 37 and a second torsion arm 38. If no external force is applied, the two torsion arms of the torsion spring 36 will be in a naturally stretched state. Referring to fig. 10B, in the natural extended state, the first torsion arm 37 and the second torsion arm 38 are each disposed generally in the up-down direction in fig. 10B. Referring to fig. 6, the second torsion arm 38 of the torsion spring 36 is engaged with the clamp housing 42, and the first torsion arm 37 of the torsion spring 36 is connected to the pressure plate 34 after being rotated by a certain angle with respect to its natural extended state. Because the first torsion arm 37 of the torsion spring 36 is rotated at an angle relative to its natural extended state, the torsion spring 36 is in a state of being deformed to store energy, whereby the pressure plate 34 is able to undergo a downward movement tendency under the influence of the torsion spring 36, such that the push plate 40 undergoes a downward movement tendency to exert a generally downward force on the clip 31.

Referring to fig. 6 and 9, the pusher plate 40 and the pressure plate 34 are disposed generally in a direction parallel to the upper end surface of the clip 31 before the clip 33 is pushed out of the clip magazine 42. After the clip feeding assembly pushes the clip 33 against the end effector 1 and the clip feeding assembly moves back, the clips 31 and 32 move downward under the action of the biasing assembly. Wherein, the pressing plate 34 rotates downwards under the action of the torsion spring 36, the pushing plate 40 rotates downwards along with the pressing plate 34, and because the pushing plate 40 can rotate around the third pivot shaft 35 relative to the pressing plate 34, the pushing plate 40 can rotate relative to the pressing plate 34 under the action of the clip 31, so that the setting direction of the pushing plate 40 is still substantially parallel to the upper end surface of the clip 31, so as to act on the clip 31 more stably.

Referring to fig. 12-13, in this embodiment, the end effector 1 communicates with the outlet of the second cavity 46 of the cartridge 42, the second cavity 46 is not coaxial with the shaft assembly 6, and therefore the end effector 1 is not coaxial with the shaft assembly 6, and the end effector 1 is offset relative to the shaft assembly 6, so that there is no overlap of the first longitudinal axis 2 of the end effector 1 with the second longitudinal axis 7 of the shaft assembly 6.

Referring to fig. 4-5, the shaft assembly 6 includes a main shaft 8, as described above. The proximal end of the hinge 47 is pivotally connected to the spindle 8 such that the hinge 47 can rotate about the first pivot axis 17 relative to the spindle 8. The distal end of the articulation member 47 has a connection portion 50 and the first and second jawarms 3, 4 of the end effector 1 are pivotally connected to the connection portion 50 of the articulation member 47 such that the articulation member 47 is capable of rotating the end effector 1 about the first pivot axis 17. In other words, the first and second jawarms 3, 4 are capable of rotating with the articulation 47 about the first pivot axis 17 as the articulation 47 rotates about the first pivot axis 17 relative to the shaft assembly 6.

Referring to fig. 14, the proximal end of the hinge 47 is pivotally connected to the distal end of the spindle 8 by a first shaft 9. The first pivot 9 is provided to the main shaft 8, the hinge member 47 has a first pivot hole adapted to the first pivot 9, and the first pivot 9 is provided therethrough such that the hinge member 47 can rotate about the first pivot 9, and thus the end effector 1 can rotate about the first pivot axis 17 relative to the shaft assembly 6. The first pivot axis 17 is the central axis of the first shaft 9.

Referring to fig. 1-3, the shaft assembly 6 further includes a sleeve 11 and a closure tube 12. The sleeve 11 is sleeved on the main shaft 8, and the closing tube 12 is sleeved on the hinge piece 47 and the clamping bin 42. The closure tube 12 has an opening 13 and the cartridge 42 can be placed into the closure tube 12 from the opening 13 and then mounted to the hinge 47. When removing the cartridge 42, the cartridge 42 is removed from the opening 13 and the cartridge 42 is removed from the closure tube 12 from the opening 13.

The proximal end of the closure tube 12 is connected to the distal end of the cannula 11, and the distal end of the closure tube 12 mates with the end effector 1. The sleeve 11 is movable proximally or distally relative to the main shaft 8 (see more particularly below) to move the closure tube 12 proximally or distally to open or close the end effector 1. Specifically, referring to fig. 4, the end effector 1 further includes a first resilient element 5, the first resilient element 5 being disposed between the first jawarm 3 and the second jawarm 4. When the closure tube 12 is moved distally (i.e., forward), the end effector 1 is received within the closure tube 12 from the distal end of the closure tube 12, at which time the first resilient element 5 is compressed to store energy and the end effector 1 is closed. When the closure tube 12 is moved proximally (i.e., rearward), the end effector 1 extends from the distal end of the closure tube 12 and the first resilient element 5 releases energy to open the end effector 1. In this embodiment, the first elastic element 5 is a spring.

The proximal end of the closure tube 12 is pivotally connected to the distal end of the sleeve 11, such that when the hinge 47 is rotated, the hinge 47 rotates the closure tube 12 relative to the sleeve 11 about the second pivot axis, as the closure tube 12 is sleeved around the hinge 47. The second pivot axis is parallel to the first pivot axis 17.

Referring to fig. 1-3, the sleeve 11 is pivotally connected to the closure tube 12 by pivot members 14. In this embodiment, two pivot members 14 are co-located, with the proximal end of each pivot member 14 being pivotally connected to the sleeve 11 and the distal end of each pivot member 14 being pivotally connected to the closure tube 12.

Specifically, the proximal end of each pivot member 14 is provided with a second rotational axis 15, and the distal end of each pivot member 14 is provided with a third rotational axis 16. The first, second and third shafts 9, 15 and 16 are disposed in substantially the same direction, and are each substantially perpendicular to the second longitudinal straight line of the shaft assembly 6. The distal end of the sleeve 11 is provided with two second pivot holes which are adapted to the second rotation axis 15. The second rotating shaft 15 of one pivoting member 14 is penetrating through one second pivoting hole, and the second rotating shaft 15 of the other pivoting member 14 is penetrating through the other second pivoting hole. The proximal end of the closure tube 12 is provided with two third pivot holes which are adapted to the third rotation axis 16. The third rotating shaft 16 of one pivot member 14 is disposed through one third pivot hole, and the third rotating shaft 16 of the other pivot member 14 is disposed through the other third pivot hole.

The central axis of the second rotation shaft 15 of one pivot member 14 coincides with the central axis of the second rotation shaft 15 of the other pivot member 14. The central axis of the third rotation shaft 16 of one pivot member 14 coincides with the central axis of the third rotation shaft 16 of the other pivot member 14.

The open state of the end effector 1 includes a state of being opened to the bottom, in which the distance between the distal end of the first jawarm 3 and the distal end of the second jawarm 4 in the up-down direction is the largest (refer to fig. 1). In the closed state of the end effector 1, the distal end of the first jawarm 3 is at a minimum distance from the distal end of the second jawarm 4 in the up-down direction (see fig. 1), and closure of the end effector 1 causes the clip 30 to transition from the open state to the closed state to adequately grip a blood vessel or tissue.

When the end effector 1 is in the open-to-bottom state, the central axis of the third rotary shaft 16 substantially coincides with the central axis of the first rotary shaft 9, and when the hinge 47 is rotated, the closing tube 12 can be rotated about the central axis of the third rotary shaft 16 with respect to the sleeve 11. At this time, the second pivot axis substantially coincides with the central axis of the third rotary shaft 16.

When the end effector 1 is in the closed state, the central axis of the second rotary shaft 15 coincides with the central axis of the first rotary shaft 9 due to the distal movement of both the sleeve 11 and the closure tube 12, and when the hinge 47 is rotated, the closure tube 12 can be rotated relative to the sleeve 11 about the central axis of the second rotary shaft 15. At this time, the second pivot axis substantially coincides with the central axis of the second rotary shaft 15.

As described above, the first pivot axis 17 is the central axis of the first shaft 9. The first pivot axis 17 coincides with the second pivot axis when the end effector 1 is in either the open or closed state.

In actual use, when the end effector 1 is in the closed position, the clip 30 in the end effector 1 is already clamped against the blood vessel or tissue, and the end effector 1 is not released from the blood vessel or tissue (the end effector 1 is opened to be released from the blood vessel or tissue), the end effector 1 is not normally rotated, i.e., the operator typically does not trigger rotation of the hinge 47 when the end effector 1 is in the closed position, and thus the closure tube 12 is not rotated.

After a certain angle of rotation of the closure tube 12 relative to the sleeve 11, the sleeve 11 is still able to act on the closure tube 12 via the pivot member 14 to drive the closure tube 12 to move proximally or distally when the sleeve 11 is moved proximally or distally due to the pivot member 14.

Referring to fig. 18-19, the lock drive assembly includes a moving member 53 and a rotating member 54. Referring to fig. 25, the moving member 53 is sleeved on the main shaft 8, and referring to fig. 20, the moving member 53 is connected to the proximal end of the locking member 62. In response to the first movement of the actuating member 77, the rotary member 54 rotates to drive the moving member 53 axially proximally, which moves the locking member 62 axially proximally to the unlocked position.

Referring to fig. 18-19, the rotary member 54 includes a first member 55, a second member 56, and a first pivot shaft 57. One end of the first member 55 abuts against the moving member 53, the other end of the first member 55 is connected to the second member 56, the first pivot shaft 57 is provided between the first member 55 and the second member 56, and both ends of the first pivot shaft 57 are rotatably connected to the housing such that the rotating member 54 as a whole can rotate relative to the housing about the central axis of the first pivot shaft 57. In response to the first distal movement of the actuator 77, the actuator 77 drives the second member 56 to rotate such that the first member 55 rotates to drive the movement of the moving member 53, thereby moving the locking member 62 to the unlocked position. Wherein the rotation directions of the first member 55 and the second member 56 are the same, in fig. 18, the first member 55 and the second member 56 are both rotated in a clockwise direction.

In this embodiment, the first motion is linear and the actuator 77 is linearly moved distally to urge the second member 56 to rotate.

Referring to fig. 16, the joint locking mechanism of the present embodiment further includes a first reset member 58, wherein when the locking member 62 is in the locked position, the locking drive assembly moves to drive the locking member 62 to the unlocked position in response to the first movement of the actuating member 77, and wherein the first reset member 58 stores the first energy during movement of the locking member 62 from the locked position to the unlocked position. The first energy is released and the locking member 62 moves to the locked position under the influence of the first restoring member 58.

Referring to fig. 23-24, the shaft assembly 6 is provided with a second receiving groove extending axially of the shaft assembly 6, in which the locking member 62 is received. The second accommodating groove comprises a first groove body 59 and a second groove body 61, the first groove body 59 is communicated with the second groove body 61, and the second groove body 61 is arranged at the distal end of the first groove body 59. The locking member 62 sequentially passes through the first groove 59 and the second groove 61. The first restoring member 58 is located in the second groove 61. A stop wall 60 is provided between the first slot 59 and the second slot 61. The locking member 62 is provided with a stopper 63 corresponding to the first restoring member 58, and the stopper 63 is located in the second groove 61.

The actuator 77 is manipulated such that the actuator 77 is in a first motion to drive the lock drive assembly such that, as the lock 62 is moved proximally, the stop 63 of the lock 62 pushes against the distal end of the first restoring member 58, the proximal end of the first restoring member 58 abuts the stop wall 60, and the stop 63 cooperates with the stop wall 60 to compress the first restoring member 58 such that the first restoring member 58 stores the first energy. The operator releases the actuator 77 and the first restoring member 58 releases the first energy causing the locking member 62 to move distally to the locked position. When the locking member 62 is moved proximally, both the stop 63 and the pin move proximally within the second channel 61. The first return member 58 may be a spring.

As described above, the articulation mechanism includes the articulation member 47 and an articulation drive assembly for driving the articulation member 47 in rotation. The articulation drive assembly comprises a transmission assembly and a lever assembly, one end of the lever assembly being connected to the transmission assembly and the other end being pivotally connected to the articulation member 47, the actuator member 77 driving the transmission assembly in motion to drive the lever assembly in motion such that the lever assembly drives the articulation member 47 in rotation and thereby the end effector 1 in rotation about the first pivot axis 17 relative to the shaft assembly 6.

Referring to fig. 20-21, the transmission assembly includes a first transmission member 64 and a second transmission member 70 engaged with the first transmission member, the second transmission member 70 being connected to one end of the lever assembly. In response to the second movement of the actuator 77, the actuator 77 drives the first transmission member 64 in rotation such that the second transmission member 70 moves in an axial direction to drive the rod assembly in motion.

The first transmission member 64 has a first tooth portion 66. The first tooth 66 includes a plurality of first teeth that are circumferentially arranged such that a central axis of the first tooth 66 is generally perpendicular to the second longitudinal axis 7 of the shaft assembly 6. The second transmission member 70 is sleeved on the main shaft 8, the second transmission member 70 has a second tooth portion 71, and the second tooth portion 71 includes a plurality of second teeth arranged in a row substantially along the second longitudinal axis 7 of the shaft assembly 6. The first tooth 66 is in meshed engagement with the second tooth 71 such that when the first drive member 64 is rotated, the first tooth 66 is in meshed engagement with the second tooth 71 such that the second drive member 70 is displaced proximally or distally.

The second tooth 71 has opposite ends along the second longitudinal axis 7 of the shaft assembly 6, each end having a stop tooth 72. That is, the plurality of second teeth of the second tooth portion 71 are located between the two spacing teeth 72. The spacing teeth 72 are wider than the second teeth, and the spacing teeth 72 do not fit the first teeth 66 of the first transmission member 64, and therefore, the first transmission member 64 cannot engage the spacing teeth 72, whereby when the spacing teeth 72 of the second transmission member 70 move to the first teeth of the first transmission member 64, the first transmission member 64 does not continue to move, and the end effector 1 is rotated at a maximum angle relative to the shaft assembly 6.

In response to the second movement of the actuator 77, the first transmission member 64 rotates about the central axis of the first tooth 66 and the second transmission member 70 moves distally or proximally in the direction of the second longitudinal axis 7 of the shaft assembly 6 to drive movement of the shaft assembly to thereby rotate the end effector 1 relative to the shaft assembly 6 about the first pivot axis 17.

Referring to fig. 23 and 26, the lever assembly includes a first lever 73 and a second lever 76, a proximal end of the first lever 73 being pivotally connected to a distal end of the second lever 76, a proximal end of the second lever 76 forming one end of the lever assembly, and a proximal end of the second lever 76 being connected to the second transmission member 70. The distal end of the first rod 73 constitutes the other end of the rod assembly, and the distal end of the first rod 73 is pivotally connected to the hinge 47. Specifically, the distal end of the second rod body 76 is provided with a fourth rotation shaft 74, the proximal end of the first rod body 73 is provided with a fourth pivot hole adapted to the fourth rotation shaft 74, and the fourth rotation shaft 74 is disposed through the fourth pivot hole, so that the first rod body 73 can rotate relative to the second rod body 76. The spindle 8 is provided with a third accommodation groove, and the second rod body 76 is provided in the third accommodation groove and is movable in the third accommodation groove in the axial direction.

The distal end of the first rod 73 is pivotally connected to the proximal end of the hinge 47 such that the distal end of the first rod 73 can act on the hinge 47. The proximal end of the hinge 47 is provided with a fifth pivot 75, the distal end of the first rod 73 is provided with a fifth pivot hole adapted to the fifth pivot 75, the fifth pivot 75 is disposed through the fifth pivot hole, and the fifth pivot 75 is not coincident with the first pivot 9.

Referring to fig. 20, the second movement of the actuator 77 drives the first transmission member 64 in rotation to move the second transmission member 70 in an axial direction to drive the second lever 76 in an axial direction such that the first lever 73 rotates to drive the articulation member 47 in rotation to rotate the end effector 1 relative to the lever body assembly 6 about the first pivot axis 17. Since the first rod 73 is pivotally connected to the hinge 47, the first rod 73 can apply force to the hinge 47 to drive the hinge to rotate, and interference between the first rod and the hinge during movement is reduced.

In this embodiment, the second movement is a rotation. The rotation of the actuating member 77 enables the end effector 1 to rotate relative to the shaft assembly 6 about the first pivot axis 17, and the rotation angle of the actuating member 77 can intuitively indicate the rotation angle of the end effector 1, so that an operator can expect the rotation angle of the end effector 1 through the rotation angle of the actuating member 77, and the adjustment of the rotation angle of the end effector 1 by the operator can be facilitated, and the convenience of the operation is improved.

Referring to fig. 25-26, in an initial state, in which the end effector 1 is not rotated, the first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6, the locking member 62 is in a locked position, and the locking member 62 is disengaged from one of the retaining grooves 52 of the hinge member 47 to lock the hinge member 47.

Referring to fig. 27-28, the actuating member 77 performs a first movement to push against the second member 56 of the rotary member 54, so that the rotary member 54 rotates to move the moving member 53 rearward in the axial direction of the shaft assembly 6, so that the locking member 62 moves to the unlocking position to disengage from the stopper groove 52 of the hinge member 47. The actuator 77 is held in abutment with the second member 56 of the rotary member 54 to hold the locking member 62 in the unlocked position, and the actuator 77 is moved in a second motion to rotate the end effector 1 a predetermined angle relative to the shaft assembly 6.

29-30, after the end effector 1 is rotated a predetermined angle relative to the shaft assembly 6, the actuating member 77 is released, the locking member 62 is reset to the locked position by the first reset member 58, and engages the other limiting groove 52 of the hinge member 47, the moving member 53 is reset by the locking member 62, the rotating member 54 is rotated and reset by the moving member 53, and the actuating member 77 is reset by the second reset member 109 (see more detail below), at which point the end effector 1 is maintained at the predetermined angle.

Referring to fig. 31 and with reference to the angle of placement of the surgical instrument of fig. 31, the end effector 1 rotates along a trajectory perpendicular to the plane of the paper on which fig. 31 is located. In fig. 31, the first direction is clockwise, and the second direction is counterclockwise.

After actuating member 77 is manipulated to move actuating member 77 in a first motion to move locking member 62 to the unlocked position, actuating member 77 is rotated in a counter-clockwise direction to rotate first toothed portion 66 of first drive member 64 in a counter-clockwise direction, first toothed portion 66 is in meshed engagement with second toothed portion 71 to cause distal displacement of second drive member 70 to move second rod 76 distally, such that first rod 73 is rotated in a first direction to drive articulation member 47 in a first direction, thereby rotating end effector 1 and cartridge 42 in a first direction.

After actuating member 77 is manipulated to move actuating member 77 in a first motion to move locking member 62 to the unlocked position, actuating member 77 is rotated in a clockwise direction to rotate first toothed portion 66 of first drive member 64 in a clockwise direction, first toothed portion 66 is in meshed engagement with second toothed portion 71 to cause proximal displacement of second drive member 70 to thereby move second rod 76 proximally, such that first rod 73 is rotated in a second direction to thereby drive articulation member 47 to rotate in a second direction, thereby rotating end effector 1 and cartridge 42 in a second direction.

Referring to fig. 25, the locking drive assembly is disposed at the left side of the joint drive assembly with a space therebetween such that the locking drive assembly and the joint drive assembly do not interfere with each other.

As described above, the actuation mechanism includes the actuation member 77, the first movement of the actuation member 77 being a linear movement and the second movement being a rotation. In response to the first movement of the actuator 77, the actuator 77 moves relative to the first transmission member 64 to drive the lock drive assembly, i.e., the first transmission member 64 is not driven in movement when the actuator 77 is in the first movement. In response to the second movement of the actuator 77, the actuator 77 rotates in synchronization with the first transmission member 64.

18-19, 22, the actuator 77 includes a first member 78 and a second member 81 connected. The operator manipulates the second member 81 such that the actuator 77 moves such that the first member 78 of the actuator 77 drives the articulation drive assembly and the lock drive assembly.

Referring to fig. 19, a first member 78 is coupled to the first transmission member 64. In particular, referring to fig. 19-21, the first transmission member 64 includes a transmission ring 65, a second pivot shaft 67, and a slider 68. The first tooth 66 is provided on the outer wall of the drive ring 65. The second pivot shaft 67 is disposed through the driving ring 65, and the slider 68 is connected to the second pivot shaft 67. The center axis of the second pivot shaft 67 coincides with the center axis of the first tooth portion 66, and the first transmission member 64 as a whole can rotate about the center axis of the second pivot shaft 67.

Referring to fig. 22, the first member 78 has a slide slot 79 and the slide 68 of the first transmission member 64 is slidably positioned in the slide slot 79 to effect connection of the first member 78 to the first transmission member 64. The extending direction of the slide groove 79 is parallel to the first moving direction of the actuating member 77, and the slider 68 is slidable in the slide groove 79 along the extending direction of the slide groove 79. The width of the slide groove 79 in the direction perpendicular to the direction of extension thereof is adapted to the width of the slide block 68, and the slide groove 79 has two side walls disposed opposite to each other in the direction of width thereof, and the slide block 68 is slidable in the slide groove 79 only in the direction of extension of the slide groove 79 under the restriction of the two side walls.

The second member 81 has an operation portion 108, and the extending direction of the operation portion 108 is at an angle to the moving direction of the first movement, preferably, the extending direction of the operation portion 108 is at a right angle to the moving direction of the first movement, and the operator moves the actuator 77 by manipulating the operation portion 108.

The operator presses the operating portion 108 of the actuating member 77 distally to push the actuating member 77 distally such that the actuating member 77 makes a first movement to move the locking member 62 to the unlocked position, during which the slider 68 slides in the chute 79 to move the actuating member 77 relative to the first transmission member 64. Note that, the movement of the slider 68 corresponds to the sliding of the slider 68 in the slide groove 79, but in actual movement, the slider 68 is not displaced in the extending direction of the slide groove 79, but the slide groove 79 of the actuator 77 is displaced, that is, the first transmission member 64 is not displaced, and the actuator 77 is displaced.

The operator keeps pressing the operating portion 108 to keep the locking member 62 at the unlocking position, and rotates the actuating member 77 by manipulating the operating portion 108 to make the actuating member 77 perform the second movement, and the two side walls of the sliding groove 79 act on the sliding block 68 to make the sliding block 68 rotate synchronously with the sliding groove 79, so that the actuating member 77 drives the first transmission member 64 to rotate around the central axis of the second pivot shaft 67, so that the second transmission member 70 moves axially to drive the rod assembly to move, and thus the end effector 1 rotates relative to the rod assembly 6.

Referring to fig. 18-19, 22, the actuator 77 has a push surface 80, and in response to a first movement of the actuator 77, the push surface 80 of the actuator 77 abuts the rotary member 54 and pushes the rotary member 54 to rotate. In response to the second movement of the actuating member 77, the push surface 80 of the actuating member 77 is held in abutment with the rotary member 54 and the push surface 80 of the actuating member 77 moves relative to the rotary member 54 to hold the locking member 62 in the unlocked position. Specifically, the pushing surface 80 is provided to the first member 78 of the actuator 77. Referring to fig. 18-19, the second element 56 of the rotating member 54 has a pushing portion 150, and when the actuating member 77 performs the first movement, the pushing surface 80 of the actuating member 77 abuts against the pushing portion 150 of the second element 56 and pushes the second element 56, so that the rotating member 54 integrally rotates. With reference to the angle of placement of the surgical instrument in fig. 19, the second element 56 of the rotator 54 is disposed to the left of the first member 78, and the actuator 77 is moved distally to bring the push surface 80 into abutment with the abutment 150.

The actuator 77 may be movable distally in the axial direction of the shaft assembly 6, or may be movable distally in a direction that is at an angle to the axial direction of the shaft assembly 6. In an initial state, the first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6, i.e., the end effector 1 is not rotated, at this time, the actuating member 77 is manipulated to move the actuating member 77 distally along the axial direction of the shaft assembly 6 to move the locking member 62 to the unlocking position, after the locking member 62 is moved to the unlocking position, the actuating member 77 is rotated by a certain angle to rotate the end effector 1 relative to the shaft assembly 6 by a predetermined angle, and then the actuating member 77 is released, the locking member 62 is moved to the locking position by the first restoring member 58, and the actuating member 77 is restored by the second restoring member 109.

When the end effector 1 is rotated by a predetermined angle and the angle of the end effector 1 needs to be adjusted again, the actuator 77 is manipulated such that the actuator 77 is moved distally to move the locking member 62 to the unlocking position, and at this time, since the actuator 77 has been rotated by a certain angle, the actuator 77 is not moved distally in the axial direction of the shaft assembly 6 but is moved distally in a direction angled with respect to the axial direction of the shaft assembly 6, and after the locking member 62 is moved to the unlocking position, the actuator 77 is rotated again to adjust the angle of the end effector 1.

19-21, the actuation mechanism further includes a second reset element 109. The actuator 77 further includes a pushing member 110, where the pushing member 110 is disposed on the first member 78 and moves with the first member 78, and the pushing member 110 is disposed on the right side of the slider 68 with reference to the placement angle of the surgical instrument in fig. 20. The second reset element 109 is disposed between the pushing element 110 and the slider 68, specifically, the pushing element 110 is provided with a first pin, the slider 68 is provided with a second pin, one end of the second reset element 109 is sleeved with the first pin, and the other end of the second reset element 109 is sleeved with the second pin. Preferably, the axis of the first pin is substantially parallel to the extending direction of the chute 79, and the first pin is coaxially disposed with the second pin.

In response to the first movement of the actuator 77, the first member drives the pushing member 110 toward the slider 68, so that the pushing member 110 cooperates with the slider 68 to press the second restoring member 109, and the second restoring member 109 deforms to store the second energy. The second energy is released and the actuating member 77 moves the reset under the influence of the second reset member 109. The second restoring member 109 may be a spring. Wherein the operator releases the operating portion 108 of the second member 81 without pressing, and the second reset element 109 releases the second energy.

Referring to fig. 17-18, in order to make the driving of the rotary member 54 and the first member 55 by the actuating member 77 more stable and balanced, the present embodiment provides two actuating members 77, and the two actuating members 77 are identical in structure. Preferably, the two actuators 77 of this embodiment are symmetrically disposed along the axial direction of the shaft assembly 6.

Referring to the angle of placement of the surgical instrument in fig. 20, first transmission member 64 has opposite first and second sides in a direction perpendicular to the plane of the paper, with one actuator member 77 disposed on a first side of first member 55 and the other actuator member 77 disposed on a second side of first member 55. Referring to fig. 19-21, the second pivot shaft 67 is disposed through the first transmission member 64, and both ends of the second pivot shaft 67 are provided with the sliding blocks 68, wherein one sliding block 68 is disposed in the sliding groove 79 of one of the actuating members 77, and the other sliding block 68 is disposed in the sliding groove 79 of the other actuating member 77.

Referring to fig. 18 to 19, the second member 56 of the rotary member 54 includes two push-against portions 150 provided corresponding to the two actuating members 77, the two push-against portions 150 being oppositely provided in an axial direction perpendicular to the shaft assembly 6. The operator can press the operating portions 108 of the two actuating members 77 simultaneously with two hands to push the two actuating members 77 so that each actuating member 77 makes a first movement, during which one of the sliders 68 slides in the slide groove 79 of one of the actuating members 77 and the other slider 68 slides in the slide groove 79 of the other actuating member 77, the push surface 80 of one of the actuating members 77 abuts against one of the push portions 150 of the second member 56, the push surface 80 of the other actuating member 77 abuts against the other push portion 150 of the second member 56, and the two actuating members 77 simultaneously drive the second member 56 to rotate so that the rotating member 54 rotates to move the locking member 62 to the unlocking position.

The operator keeps pressing the operation portions 108 of the two actuating members 77 to keep the locking member 62 at the unlocking position, and rotates the two actuating members 77 through the two operation portions 108, so that each actuating member 77 performs the second movement, one actuating member 77 drives one of the sliding blocks 68 to rotate, and the other actuating member 77 drives the other sliding block 68 to rotate, so that the two actuating members 77 jointly drive the first transmission member 64 to rotate around the central axis of the second pivot shaft 67, so that the second transmission member 70 moves in the axial direction to drive the rod assembly to move, and further the end effector 1 rotates relative to the rod body assembly 6.

The hinge 47 has an initial position in which the first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6 and a plurality of rotational positions in which the hinge 47 is in one of the rotational positions the first longitudinal axis 2 of the end effector 1 is at an angle to the second longitudinal axis 7 of the shaft assembly 6.

In surgery, a puncture device is commonly used to pierce the abdomen of a human body to form a puncture channel 51 through which instruments pass. When the clip applier is advanced into and out of the abdominal cavity through the penetration channel 51, the first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6 and the end effector 1 is allowed to pass smoothly through the penetration channel 51, as required by the hinge 47 in the initial position. If the end effector 1 is rotated by a predetermined angle relative to the shaft assembly 6, the end effector 1 may become stuck with the penetrator and may not enter the penetration channel 51.

Referring to fig. 32-35, the clip applier of the present embodiment further includes a positioning assembly 114, the positioning assembly 114 being disposed in the housing and disposed proximate the first transmission member 64 of the transmission assembly. The positioning assembly 114 has an abutment end and the first transmission member 64 has a positioning slot 69. In the initial state, the actuating member 77 does not rotate the first transmission member 64, the hinge member 47 is in the initial position, the end effector 1 is not rotated, the first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6, and the abutting end of the positioning assembly 114 is engaged with the positioning groove 69 of the first transmission member 64.

In response to the second movement of the actuator 77, the actuator 77 rotates the first transmission member 64 such that the second transmission member 70 moves axially to drive the rod assembly to move such that the articulation member 47 rotates to rotate the end effector 1 relative to the shaft assembly 6, at which point the articulation member 47 is in one of the rotational positions with the abutment end of the positioning assembly 114 disengaged from the positioning slot 69 of the first transmission member 64 and the first longitudinal axis 2 of the end effector 1 angled from the second longitudinal axis 7 of the shaft assembly 6.

When the clip applier is to be removed after the operation, the actuator 77 is manipulated to perform a second motion to rotate the first transmission member 64 such that the abutment end of the positioning assembly 114 engages the positioning slot 69 of the first transmission member 64, and the first longitudinal axis 2 of the end effector 1 is parallel to the second longitudinal axis 7 of the shaft assembly 6, at which point the clip applier can enter the penetration channel 51.

The positioning assembly 114 allows the operator to accurately and quickly adjust the angle of the end effector 1 to have its first longitudinal axis 2 parallel to the second longitudinal axis 7 of the shaft assembly 6, thereby enabling quick removal of the surgical instrument after the procedure is completed, improving the ease of the procedure.

As described above, the first transmission member 64 includes the transmission ring 65. 34-35, a detent 69 is provided on the outer wall of the drive ring 65.

Referring to fig. 32-35, the positioning assembly 114 includes a barrel 115, a second resilient member 116, and a second stop member 117, the barrel 115 being coupled to the housing, the second resilient member 116 being disposed in the barrel 115, the second stop member 117 also being disposed in the barrel 115 and coupled to the second resilient member 116, the second resilient member 116 biasing the second stop member 117 toward the first transmission member 64 such that an end of the second stop member 117 engages the positioning slot 69 of the first transmission member 64. The end of the second stop 117 constitutes an abutment end of the positioning assembly 114.

To drive the cannula 11 and clip assembly distally, the surgical instrument of this embodiment further includes a transmission mechanism housed within the head housing. The transmission mechanism alternatively has a first state and a second state. In the first state, the drive mechanism drives the clip feed assembly distally. In the second state, the transmission mechanism drives the cannula 11 distally.

36-37, the transmission mechanism includes a switching mechanism, a first drive member 118, and a second drive member 120. The first driver 118 is used to drive the clip feeding assembly distally and the second driver 120 is used to drive the cannula 11 distally. The wrench 22 is in contact with the switching mechanism to supply power to the switching mechanism, and the switching mechanism transmits the power to the first driver 118 or the second driver 120 alternatively.

The wrench 22 can drive the switching mechanism distally. In the first state, the switching mechanism moves distally to drive the first driver 118 distally. After the switching mechanism moves to the far end by a preset stroke, the transmission mechanism is switched from the first state to the second state. When the transmission mechanism is switched to the second state, the switching mechanism continues to move distally to drive the second driving member 120 to move distally.

In the first state, the switching mechanism is operably coupled to the first drive member 118 to perform a clip feeding action, the switching mechanism driving the first drive member 118 to move distally to drive the clip feeding assembly distally such that the clip feeding assembly drives the clip 30 of the clip cartridge 42 to move to the end effector 1 such that the clip 30 is stably clamped in the end effector 1 awaiting clip application. In the second state, the switching mechanism is disengaged from the first driver 118, the first driver 118 is no longer advanced, and at this time the clip 30 has been stably held in the end effector 1, the switching mechanism drives the second driver 120 distally, such that the cannula 11 moves distally to drive the closure tube 12 distally, thereby closing the end effector 1, and the clip 30 in the end effector 1 grips the tissue or blood vessel.

Referring to fig. 37, the first driving member 118 is sleeved on the main shaft 8 and can move along the main shaft 8. As described above, the clip feeding assembly includes the push rod 27, the elastic rod 28, and the push block 29, the proximal end of the elastic rod 28 is connected to the push rod 27, and the distal end of the elastic rod 28 is connected to the push block 29. The proximal end of the push rod 27 is coupled to a first driver 118, and proximal or distal movement of the first driver 118 can drive the clip feeding assembly. The second driving member 120 includes a base, the base is sleeved on the spindle 8, a distal end of the base is connected to a proximal end of the sleeve 11, and a distal end of the base has an abutting portion. Proximal or distal movement of the second driver 120 can drive proximal or distal movement of the cannula 11.

With continued reference to fig. 37, the switching mechanism includes a base 121, a first clutch mechanism, and a second clutch mechanism. The wrench 22 abuts the base 121 to power the switching mechanism such that the switching mechanism moves distally. When the transmission mechanism is in the first state, the base 121 is sleeved on the first driving member 118. Specifically, the base 121 has a through hole in which the first driving member 118 is accommodated, and the through hole penetrates the proximal end surface of the base 121 so that the base 121 can be advanced beyond the first driving member 118. When the transmission mechanism is in the second state, the first driving member 118 is not advanced any more, the base 121 is still advanced, and the base 121 is separated from the first driving member 118.

The first clutch mechanism includes a first clutch member and a clutch switching mechanism. The first clutch member is connected with the clutch switching mechanism. The second clutch mechanism includes a second clutch member 131, and in order to make the structure of the switching mechanism simpler and more compact, the second clutch member 131 is a distal end surface of the base 121.

When the transmission mechanism is in the first state, the first clutch member is connected with the first driving member 118, so that the switching mechanism can drive the first driving member 118 to move so as to enable the clip feeding assembly to move, and therefore the clip feeding action is executed. Meanwhile, when the transmission mechanism is in the first state, the distal end face of the base 121 is separated from the proximal end face of the second driving member 120.

When the transmission mechanism is in the second state, the first clutch member is separated from the first driving member 118 under the action of the clutch switching mechanism; at the same time, the distal end surface of the base 121 (second clutch member 131) abuts the proximal end surface of the second drive member 120 to urge the second drive member 120 to move distally, thereby driving the cannula 11 and the closure tube 12 to move to perform the pinching action.

The structure and principle of the switching mechanism will be described in more detail below with reference to the placement angle of the surgical instrument in fig. 36:

referring to fig. 36-37, the base 121 has a first side and a second side opposite the first side. The base 121 is provided with a first kidney-shaped hole 122 at a first side and a second kidney-shaped hole at a second side, each extending in the up-down direction.

The clutch switching mechanism includes a guide post 123. A guide rail is provided in the head housing of the surgical instrument, on which guide rail the guide post 123 is movable, the guide post 123 being connected to the first clutch member. 1-3, the head housing of the surgical instrument includes a first head housing 20 and a second head housing 21. The first head housing 20 and the second head housing 21 are symmetrically disposed along the axial direction of the shaft assembly 6. The guide rail is alternatively provided on the inner wall of the first head housing 20 or the inner wall of the second head housing 21. In order to make the movement of the guide post 123 on the guide rail smoother, the guide rail is symmetrically provided at the inner walls of the first head housing 20 and the second head housing 21. That is, the inner wall of the first head housing 20 is provided with a guide rail, and the inner wall of the second head housing 21 is also provided with a guide rail.

The guide post 123 has a first end and a second end. The guide post 123 is received in the base 121, and a first end of the guide post 123 is extended from the first kidney-shaped hole 122 to move on a guide rail of the inner wall of the first head housing 20. The second end of the guide post 123 is extended from the second kidney-shaped hole and then moves on the guide rail of the inner wall of the second head housing 21. Since each kidney-shaped hole extends in the up-down direction, the guide post 123 can move up and down,

The guide rail comprises a first guide surface 129 and a second guide surface 130, the second guide surface 130 being higher than the first guide surface 129. The guide post 123 is movable between a first guide surface 129 and a second guide surface 130. The first guide surface 129 is smoothly connected with the second guide surface 130 by a slope so that the movement of the guide post 123 is smoother.

The guide post 123 is capable of following the movement of the first clutch member to move on the guide rail. The first clutch member remains coupled to the first driving member 118 while the guide post 123 moves on the first guide surface 129. Since the second guide surface 130 is higher than the first guide surface 129, the guide post 123 moves onto the second guide surface 130 of the guide rail to drive the first clutch member to move upward, so that the first clutch member is separated from the first driving member 118. And when the first clutch member is separated from the first driving member 118, the second clutch member 131 abuts against the second driving member 120 to push the second driving member 120 to move.

Referring to fig. 37 to 38, the first driving member 118 is an annular member, and an outer peripheral surface of the first driving member 118 is provided with an annular rib 119. The first clutch is accommodated in the base 121. The first clutch includes a post 124, a stop 125, and a latch 126. The upper end of the column 124 is connected to the guide column 123, so that the column 124 can drive the guide column 123 to move distally or proximally, and the guide column 123 can drive the column 124 to move up and down. The block 125 is disposed at the bottom end of the column 124, and the clamping block 126 is disposed at the bottom end of the block 125. The bottom end of the latch 126 is detachably coupled to the first driving member 118. The bottom end surface of the clamping block 126 is an arc surface matched with the surface of the first driving piece 118, so that the connection between the clamping block 126 and the first driving piece 118 is more stable.

In the first state, the clamping block 126 is located at the proximal end of the annular flange 119, the distal end surface of the clamping block 126 abuts against the proximal end surface of the annular flange 119, and the clamping block 126 can push the annular flange 119 distally, so that the first driving member 118 moves distally. In the second state, the latch 126 moves upward to disengage from the annular rib 119. The proximal end surface of the latch block 126 is an inclined surface, whereby, when the first clutch member is reset (see later in detail), the proximal end surface of the latch block 126 can pass from the distal end of the annular rib 119 to return the latch block 126 to the proximal end of the annular rib 119.

The first clutch member further includes a second resilient member 127. The second elastic element 127 is sleeved on the column 124, the upper end of the second elastic element 127 is abutted against the guide column 123, and the lower end of the second elastic element 127 is abutted against the upper end of the stop block 125. In the first state, the second elastic element 127 is in a compressed state, and the second elastic element 127 applies a downward force to the stop block 125, so that the bottom end of the clamping block 126 is in more stable abutment with the first driving member 118, and stability of the feeding and clamping actions is improved.

Referring to fig. 37-38, the surgical instrument further includes a third restoring member 132, the third restoring member 132 configured to store a third energy during distal movement of the first driver 118. The third energy is released and the first driver 118 is moved proximally to reset under the influence of the third reset element 132. Specifically, the third resetting member 132 is sleeved on the spindle 8. The outer wall of the main shaft 8 is provided with a stop surface 10, the first driving piece 118 is located near the stop surface 10, the third resetting piece 132 is arranged between the stop surface 10 and the first driving piece 118, the proximal end of the third resetting piece 132 is abutted with the first driving piece 118, and the distal end of the third resetting piece 132 is abutted with the stop surface 10 of the main shaft 8. The third restoring member 132 is capable of being compressed to store third energy during distal movement of the first driving member 118 by the switching mechanism. The third return member 132 may be a spring.

The surgical instrument further includes a fourth restoring member 133, the fourth restoring member 133 configured to store fourth energy during distal movement of the second driver 120. The fourth energy is released and the second driver 120 is moved proximally to reset under the influence of the fourth reset element 133. Specifically, the fourth restoring member 133 is sleeved on the sleeve 11, the second driving member 120 is disposed in the housing, the proximal end of the fourth restoring member 133 abuts against the distal end surface of the second driving member 120, and the distal end of the fourth restoring member 133 abuts against the inner wall of the head housing. In the process of driving the second driving member 120 to move distally by the switching mechanism, the fourth restoring member 133 is compressed to store the fourth energy, and the fourth energy is released, so that the second driving member 120 can move proximally to restore. When the second driving member 120 moves to reset proximally, the second driving member 120 drives the switching mechanism to move to reset proximally. The fourth restoring member 133 may be a spring.

The first driving member 118 is disposed near the second driving member 120, when the transmission mechanism is in the first state, the base 121 moves distally under the action of the wrench 22, the first clutch member moves distally, the guide post 123 moves distally along the first guide surface 129 under the action of the first clutch member, and when the guide post 123 moves from the first guide surface 129 to the second guide surface 130, the guide post 123 drives the first clutch member to move upwardly, so that the first clutch member is separated from the first driving member 118, and the transmission mechanism is switched to the second state. When the transmission mechanism is in the second state, the distal end surface of the base 121 (i.e., the second clutch member 131) abuts against the proximal end surface of the second driving member 120 to push the second driving member 120 to move distally, thereby driving the cannula 11 and the closure tube 12 to move to perform the clamping action.

When the transmission mechanism is in the first state, the switching mechanism is coupled to the first driver 118 and the surgical instrument performs a clip feeding action. The user manipulates the wrench 22 such that the first clutch member pushes against the first driver member 118 to move distally, and thus the clip feeding assembly moves distally, referring to fig. 1, 12-13, the clip feeding assembly pushes against the clip 30 from the proximal end of the clip 30 in the second cavity 46 of the clip magazine 42 to push the clip 30 to the end effector 1, at which point the clip 30 is in the ready position for the clip feeding completion time. The ready position, i.e., the position where the clip 30 is stably held by the end effector 1 and can be effectively compressed to the closed state, if the clip 30 slides within the end effector 1 so that it is not in the ready position, insufficient support to the clip 30 can be caused during clip application to automatically eject the clip 30 or twist the clip 30, resulting in poor compression.

When the user manipulates the wrench 22 to push the clip 33 in the clip magazine 42 into the end effector 1, if the user inadvertently releases the wrench 22 before the clip feeding assembly pushes the clip 33 into the ready position, the switching mechanism is retracted under the action of the fourth reset member 133, resulting in the clip feeding assembly being retracted. Since the clip 33 has been pushed forward by a certain stroke, after the clip feeding assembly is retracted, the clip 31 and the clip 32 move downward to the second cavity 46, and when the user manipulates the wrench 22 again to drive the clip feeding assembly to move distally, the clip feeding assembly pushes the clip 32 and the clip 33 simultaneously, and the clip 32 interferes with the clip 33, so that the clip cannot be fed normally. Thus, in this embodiment, before the clip feeding assembly pushes the clip 33 into the ready position, the clip feeding assembly is always held against the clip 33 at the proximal end of the clip 33 and supports the clip 31 and the clip 32, and even if the user inadvertently releases the wrench 22, the clip feeding assembly does not retract, and the clip 31 and the clip 32 do not advance into the second cavity 46.

As described above, when the transmission mechanism is in the second state, the switching mechanism is disengaged from the first drive member 118, the switching mechanism is in abutment with the second drive member 120, and the surgical instrument performs the clamping action. The user manipulates the wrench 22 and the switching mechanism pushes the second driver 120 distally, causing the cannula 11 and the closure tube 12 to move distally to close the end effector 1, thereby closing the clip 30 in the end effector 1, at which point the clip 30 in the ready position is applied to tissue or blood vessel for the time of clip application completion.

When the end effector 1 is closed to close the clip 30, the clip 30 will tend to move proximally during the forced closing process, resulting in poor clamping, so in this embodiment, the clip feeding assembly is held against the clip 30 at the proximal end of the clip 30 when the transmission mechanism is in the second state, preventing the clip 30 from backing out and preventing clip application. In other words, when the transmission mechanism is in the second state, the switching mechanism is disengaged from the first drive member 118, and the first drive member 118 does not move proximally, so that the clip feeding assembly can continue to hold the clip 30 proximally of the clip 30. When the end effector 1 is closed, at which point the clip 30 has been applied to tissue or a blood vessel, the first driver 118 is moved proximally in return.

To achieve the above effect, the surgical instrument according to the present embodiment further includes a retaining mechanism. Referring to fig. 36, the backstop mechanism is housed within the head housing.

As described above, the wrench 22 is movably coupled to the housing. Pulling on the wrench 22 causes the wrench 22 to move relative to the housing, and in particular, referring to fig. 36, the wrench 22 rotates toward the handle housing 19. The wrench 22 movement may be in three particular positions: an open position, an intermediate position, and a closed position. At an initial time, the user does not operate the wrench 22, and the wrench 22 is in the open position. When the user operates the wrench 22 and the clip feeding is completed, the wrench 22 is positioned at the intermediate position, and when the wrench 22 is positioned at the intermediate position, the clip 30 is positioned at the ready position. The user operates the wrench 22, and at the time of completion of clamping, the wrench 22 is in the closed position.

Specifically, the switching mechanism is coupled to the first driver 118 during the movement of the wrench 22 from the open position to the intermediate position, and the wrench 22 urges the switching mechanism distally to move the first driver 118 distally to effect the clip feeding action by the surgical instrument. "before moving to the neutral position" means that the wrench 22 has not moved to the neutral position. When the wrench 22 is in the neutral position, the switching mechanism is separated from the first driving member 118, and the switching mechanism is moved to abut against the second driving member 120. During movement of the wrench 22 from the intermediate position to the closed position, the wrench 22 pushes the switching mechanism distally to move the second driver 120 distally, and the surgical instrument performs the clamping action.

The backstop mechanism includes a guide pivot 134. Referring to fig. 39-41, the guide pivot 134 has a first stop 135, a second stop 138, and a third stop 141. The second stop 138 is located between the first stop 135 and the third stop 141. Specifically, the first stop portion 135 is located proximal to the second stop portion 138, and the third stop portion 141 is located distal to the second stop portion 138.

As described above, the wrench 22 can drive the first drive 118 to move to cause the clip feed assembly to push the clip 30 into the end effector 1.

In response to movement of the wrench 22 from the open position to the intermediate position, the first stop 135 and the second stop 138 are positioned at the proximal end of the first driver 118 in sequence to prevent the first driver 118 from backing. Before the clip 30 enters the ready position, if the user inadvertently releases the wrench 22, the first driving member 118 will abut against the first retaining portion 135 or the second retaining portion 138, so that the first driving member 118 will not retract, and the clip feeding assembly will always remain at the proximal end of the clip 30 to abut against the clip 30, thereby avoiding a clip feeding error.

In response to movement of the wrench 22 from the intermediate position to the closed position, the third stop 141 is located at the proximal end of the first driver 118 and is held in abutment with the first driver 118 to prevent the first driver 118 from backing. "before moving to the closed position" means that the wrench 22 has not moved to the closed position. The first driver 118 does not retract until the end effector 1 is closed, and the clip feeding assembly is held at the proximal end of the clip 30 against the clip 30 to prevent the clip 30 from retracting, thereby ensuring clip application stability.

With the wrench 22 in the closed position, after the clip 30 has been applied to tissue or a blood vessel, the third stop 141 is separated from the first driver 118, the first driver 118 is moved proximally for repositioning, and the clip assembly is moved proximally for repositioning.

The first driver 118 has a home position, a first position, a second position, and a third position. The initial position, i.e., the position in which the user has not manipulated the wrench 22, is where the first driver 118 is not moved. The wrench 22 moves to actuate the switching mechanism such that the switching mechanism actuates the first actuating member 118 to move distally from the initial position, past the first position, past the second position, and then to the third position.

When the wrench 22 is in the open position, the first driver 118 is in the home position.

The wrench 22 is moved to drive the switching mechanism such that the switching mechanism drives the first driving member 118 from the initial position to the first position, the first driving member 118 is located at the distal end of the first stopping portion 135. Specifically, when the first driving member 118 moves distally from the initial position to the first position, the first driving member 118 just reaches the distal end of the first stopping portion 135, and at this time, if the first driving member 118 moves proximally, the proximal end of the first driving member 118 abuts against the first stopping portion 135 and cannot continue to retract.

The first driving member 118 is located between the first stop portion 135 and the second stop portion 138 before the first driving member 118 moves from the first position to the second position. Specifically, the first driver 118 moves distally between the first stop 135 and the second stop 138 during the process of distally moving the first driver 118 from the first position to the second position. During this movement, if the first driving member 118 moves proximally, the proximal end of the first driving member 118 will abut against the first stopping portion 135 and cannot continue to retract.

The wrench 22 moves to actuate the switching mechanism such that the first driver 118 is distal to the second stop 138 when the first driver 118 moves from the first position to the second position. Specifically, when the first driving member 118 is in the second position, the first driving member 118 reaches just the distal end of the second stopping portion 138. At this time, if the first driving member 118 moves proximally, the proximal end of the first driving member 118 contacts the second retaining portion 138 and cannot continue to retract.

Before the first driving member 118 moves from the second position to the third position, the first driving member 118 is located between the second stopping portion 138 and the third stopping portion 141. Specifically, the first driver 118 moves distally between the second stop 138 and the third stop 141 during the process of moving the first driver 118 from the second position to the third position. During this movement, if the first driving member 118 moves proximally, the proximal end of the first driving member 118 will abut against the second stopping portion 138 and cannot continue to retract.

When the wrench 22 is moved to the intermediate position, the first driver 118 is in the third position. When the first driving member 118 moves from the second position to the third position, the first driving member 118 is located at the distal end of the third stopping portion 141. Specifically, when the first driving member 118 is located at the third position, the first driving member 118 just moves to the distal end of the third stopping portion 141, and the third stopping portion 141 abuts against the proximal end of the first driving member 118, and at this time, if the first driving member 118 moves proximally, the proximal end of the first driving member 118 abuts against the third stopping portion 141 and cannot continue to retract.

When the first driver 118 is in the third position, the wrench 22 is in the intermediate position, and the wrench 22 is continuously operated, so that the third stopping portion 141 is always abutted against the proximal end of the first driver 118 to stop the first driver 118 from being retracted before the wrench 22 moves from the intermediate position to the closed position.

Note that, moving proximally means moving in a direction toward the proximal end of the surgical instrument, and moving distally means moving in a direction toward the distal end of the surgical instrument, for convenience of description. Meanwhile, unless otherwise indicated, the proximal and distal ends in the other contexts are also the proximal and distal ends of the surgical instrument.

When the wrench 22 moves from the intermediate position to the closed position, the third stopper 141 is disengaged from the first driving member 118, and the first driving member 118 is moved proximally to be reset by the third reset member 132.

The first driver 118 moves distally to drive the clip feeding assembly to move the clip 33 within the second cavity 46. When the first drive member 118 is moved to the second position, the clip 33 is moved to the clip ejection chamber 42. When the first driver 118 moves to the third position, the clip 33 enters the ready position.

The first driver 118 drives the clip feed assembly to move the clip 33 until it is completely out of the clip magazine 42, the first driver 118 being positioned between the first stop 135 and the second stop 138 to prevent the first driver 118 from backing. The clip feeding assembly drives the clip 33 to move to the fully out of the clip magazine 42, at which time the distal end of the clip 32 abuts the upper surface of the clip 33 and the proximal end of the clip 32 abuts the upper portion of the clip feeding assembly. If the clip feeding assembly is retracted, the proximal end of the clip 32 falls into the second cavity 46 under the action of the biasing assembly, and when the clip feeding assembly moves forward again, the distal end of the clip feeding assembly pushes the clip 32 against the clip 33, and the clip feeding assembly cannot feed the clip 33 to the ready position due to interference of the clip 32, so that the clip feeding failure occurs. The clip feeding assembly of this embodiment does not retract until the clip 33 is moved completely out of the clip magazine 42, so that no clip feeding failure occurs.

When the first driving member 118 drives the clip feeding assembly to push the clip 30 to move to the ready position, the first driving member 118 moves to the distal end of the third stopping portion 141 and abuts against the distal end of the third stopping portion 141 to prevent the first driving member 118 from retreating. When the gripper assembly drives the gripper 30 to move to the ready position, the gripper assembly is retracted. During closure of the end effector 1, the clip 30 is forced back and cannot be applied. The clip feeding assembly of the embodiment does not retract before and during the closing process of the end effector 1, and can abut against the clip 30 to prevent the clip from retracting, so that the normal clip application can be ensured.

Referring to fig. 41, the proximal end of the first stopping portion 135 has a first guide surface 136, the distal end of the first stopping portion 135 has a first stopping surface 137, the first driver 118 is movable from the first guide surface 136 between the first stopping portion 135 and the second stopping portion 138, and the first stopping surface 137 is capable of abutting the first driver 118 to prevent the first driver 118 from being retracted when the first driver 118 is retracted.

The proximal end of the second stopping portion 138 has a second guiding surface 139, the distal end of the second stopping portion 138 has a second stopping surface 140, the first driver 118 is movable from the second guiding surface 139 between the second stopping portion 138 and the third stopping portion 141, and the second stopping surface 140 is capable of abutting the first driver 118 to prevent the first driver 118 from being retracted when the first driver 118 is retracted.

The proximal end of the third stopping portion 141 has a third guide surface 142, the distal end of the third stopping portion 141 has a third stopping surface 143, the first driver 118 is movable from the third guide surface 142 to the distal end of the third stopping portion 141, and the third stopping surface 143 is capable of abutting the first driver 118 to prevent the first driver 118 from retreating when the first driver 118 retreats.

Specifically, referring to fig. 41, the first guiding surface 136 is an arc surface, and the first guiding surface 136 forms an obtuse angle with the movement direction of the first driving member 118, so that the first driving member 118 can move along the first guiding surface 136 and enter the distal end of the first stopping portion 135. The first stopping surface 137 is at an acute angle or a right angle to the direction of movement of the first driver 118, so that the first driver 118 cannot move along the first stopping surface 137 to the proximal end of the first stopping portion 135, but can abut against the first stopping surface 137.

The structures of the first guide surface 136, the second guide surface 139 and the third guide surface 142 are substantially the same as those of the first driving member 118, and the structures of the second guide surface 139 and the third guide surface 142 and the matching of the first driving member 118 are not described in detail. The first stop surface 137, the second stop surface 140, and the third stop surface 143 are substantially identical in structure and the manner of engagement with the first driving member 118, and the structure of the second stop surface 140 and the third stop surface 143 and the manner of engagement with the first driving member 118 are not described in detail.

When the first driving member 118 moves to the first stopping portion 135, the first driving member 118 applies a force to the first stopping portion 135, and under the action of the biasing spring 148 (see below), the guide pivot member 134 moves downward a certain distance, so that the first stopping portion 135 moves downward to enable the first driving member 118 to pass through the first stopping portion 135, and when the first driving member 118 moves backward through the first stopping portion 135 and to the distal end of the first stopping portion 135, the guide pivot member 134 moves upward under the action of the biasing spring 148, so that the first stopping portion 135 moves upward on the movement track of the first driving member 118, so that the first stopping portion 135 can abut against the first driving member 118. The first stopping portion 135, the second stopping portion 138, and the third stopping portion 141 are substantially identical to the first driving member 118 in terms of their engagement, and will not be described in detail herein.

Referring to fig. 41, the guide pivot 134 of the present embodiment has a pivot portion 144, a guide portion 146, and a force receiving portion 147. The force receiving portion 147 is disposed between the pivot portion 144 and the guiding portion 146. The pivot 144 is pivotally connected to the housing by a third pin 145 such that the guide pivot 134 is rotatable about the third pin 145 relative to the housing. The first stopping portion 135, the second stopping portion 138 and the third stopping portion 141 are all disposed above the pivot portion 144.

The backstop mechanism also includes a biasing spring 148. One end of the biasing spring 148 abuts the force receiving portion 147, and the other end abuts the housing. The biasing spring 148 is in a compressed state to apply a force to the force receiving portion 147 such that the guide pivot 134 has a tendency to rotate clockwise about the third pin 145 of the pivot 144, i.e., the first stop 135, the second stop 138, the third stop 141, and the guide 146 also have a tendency to rotate clockwise.

Referring to fig. 39, the wrench 22 includes a wrench body 23, a user-operated grip portion 24 provided at one end of the wrench body 23, and a pushing claw 25 provided at the other end of the wrench body 23, the pushing claw 25 abutting against and pushing a base 121 of the switching mechanism so that the switching mechanism moves to drive the first driving member 118 or the second driving member 120 to move. The wrench body 23 is provided with a pivot end 26 pivotally connected to the housing, and the wrench 22 is rotatable about the pivot end 26. The wrench 22 also has a guide channel 82. The guide channel 82 is located in the wrench body 23 between the pivot end 26 and the pawl 25.

Referring to fig. 39-41, the backstop mechanism of the present embodiment further includes a guide member 149, the guide member 149 being disposed on the guide portion 146 of the guide pivot member 134. At least a portion of the guide 149 is received in the guide channel 82. When the wrench 22 rotates about its pivot end 26, the guide channel 82 rotates with it, driving the guide 149 to move about the third pin 145 under the influence of the biasing spring 148.

As described above, when the first driving member 118 moves to the first stopping portion 135, the first driving member 118 applies a force to the first stopping portion 135, and the guide pivot member 134 moves downward by a certain distance under the action of the biasing spring 148, and the guide member 149 also moves downward by a certain distance in the guide channel 82. It should be noted that, since the guide pivot 134 is capable of rotating relative to the housing about the third pin 145, "the guide pivot 134 moves down" and "the guide 149 moves down" mean that, with the counterclockwise rotation of the guide pivot 134, the portion of the guide pivot 134 located distal to the pivot portion 144 including the respective stopper portions moves down relative to each other, and the guide 149 also moves down relative to each other.

Referring to fig. 42, the guide channel 82 includes a start point 89, a first stop point 90, a second stop point 91, a third stop point 92, and an end point 93. During the movement of the user operated wrench 22 from the open position to the closed position, the wrench 22 moves, the guide channel 82 moves relative to the guide member 149, and the guide member 149 moves in the guide channel 82 from the start point 89 to the first stop point 90, the second stop point 91, the third stop point 92 and the end point 93 in sequence with the movement of the wrench 22. The guide channel 82 is a closed channel 51, the closed channel 51 is a channel 51 surrounded by a periphery, and the guide member 149 is limited in the guide channel 82 from moving to the periphery and cannot leave the guide channel 82, so that the guide member 149 cannot be separated from the wrench 22 in the embodiment.

The distance from the start point 89 to the pivoting end 26 of the wrench 22 and the distance from the end point 93 to the pivoting end 26 of the wrench 22 are both less than the distance from the first stop point 90 to the pivoting end 26 of the wrench 22, and less than the distance from the second stop point 91 to the pivoting end 26 of the wrench 22, and less than the distance from the third stop point 92 to the pivoting end 26 of the wrench 22. That is, the first stop point 90, the second stop point 91, and the third stop point 92 are located higher than the start point 89 and the end point 93. Thus, when the wrench 22 is pulled, the wrench 22 moves to drive the guide 149 to rotate clockwise from the starting point 89 to lift up to the first stop point 90 under the action of the biasing spring 148, and the wrench 22 continues to move so that the guide 149 moves from the first stop point 90 to the second stop point 91, the third stop point 92 in sequence, and then moves downward to the end point 93. When the guide 149 moves to the first stop point 90, the guide pivot 134 is flipped up such that the first, second and third stops 135, 138, 141 are all moved up.

When the wrench 22 is in the open position, the first driver 118 is in the home position with the guide 149 at the start point 89.

When the wrench 22 moves such that the guide 149 moves from the initial position to the first stop point 90, the guide pivot 134 has rotated upward, the first driver 118 moves to the first position under the influence of the wrench 22, and the first driver 118 moves just distal of the first stop 135, i.e., the first stop 135 is located proximal of the first driver 118 to prevent the first driver 118 from backing. At this time, when the wrench 22 is released, the first driver 118 is retracted a short distance and then abuts against the first stopper 135, and the retraction is stopped, whereby the first driver 118 can be prevented from being retracted.

Movement of the wrench 22 causes the guide 149 to move distally between the first stop 135 and the second stop 138 before the first stop 90 moves to the second stop 91. In this process, the wrench 22 is released, and the first driving member 118 is retracted a small distance and then abuts against the first stopping portion 135, so that the continued retraction is stopped.

When the guide member 149 is positioned at the second stop point 91, the first driving member 118 is positioned at the second position, and at this time, the first driving member 118 moves just far to the distal end of the second stop portion 138, i.e., the second stop portion 138 is positioned at the proximal end of the first driving member 118 to prevent the first driving member 118 from being retracted. At this time, when the wrench 22 is released, the first driver 118 is retracted a short distance and then abuts against the second stopper 138, and the continued retraction is stopped.

Movement of the wrench 22 causes the guide 149 to move distally between the second stop 138 and the third stop 141 before the second stop 91 moves to the third stop 92. In this process, when the wrench 22 is released, the first driving member 118 is retracted a small distance and then abuts against the second retaining portion 138 to stop the continued retraction.

When the wrench 22 moves to the intermediate position, the guide 149 is located at the third stop point 92, the clip 30 is located at the ready position, the first driver 118 is located at the third position, the first driver 118 moves just distal of the third stop 141, and the first driver 118 abuts the distal of the third stop 141 to prevent the first driver 118 from backing.

The first driver 118 is always in the third position during movement of the wrench 22 such that the guide 149 moves from the third stop 92 to before the end 93, and the third stop 141 abuts the proximal end of the first driver 118 to prevent the first driver 118 from backing. Specifically, the guide member 149 does not move downward from the third stop 92 to the end 93, so that the third stop 141 can be held in abutment with the proximal end of the first driving member 118, so that the clip feeding assembly can abut the clip 30 at the proximal end of the clip 30, and the clip 30 does not retract during clip application, thereby ensuring clip application stability.

When the guide 149 moves from the third stop 92 to the end 93, the third stop 141 is separated from the first driver 118, and the first driver 118 is returned to the initial position. Specifically, the guide member 149 is moved downward to guide the pivot member 134 at the completion of the clamping operation when the end point 93 is reached, the third retaining portion 141 is moved below the first driving member 118, and the first driving member 118 is reset, and the wrench 22 is at the closed position.

Referring to fig. 42, the guide passage 82 includes a main passage 83 and only one sub passage 84 extending from an opening 13 portion of the main passage 83, the opening 13 portion being located between both ends of the main passage 83. The secondary channel 84 extends from the open 13 of the primary channel 83 in a direction away from the pivot end 26, i.e. the distance between the secondary channel 84 and the pivot end 26 is greater than the distance between the primary channel 83 and the pivot end 26. The main channel 83 has a start point 89 and an end point 93 at each end. The first stop point 90, the second stop point 91, and the third stop point 92 are all located within the secondary channel 84. The biasing spring 148 applies a force to the guide pivot 134 such that the guide 149 can disengage from the primary channel 83 into the secondary channel 84.

As the guide 149 moves from the start point 89 of the main channel 83 into the secondary channel 84, the guide 149 moves up to the first stop point 90, and the guide pivot 134 rotates upward. As the guide 149 moves within the slave channel 84, the guide 149 passes the second stop point 91 and the third stop point 92 in sequence. The guide 149 remains moving from the channel 84 before moving from the third stop 92 to the end 93, at which time the third stop 141 is always held in abutment with the first driver 118. When the guide 149 moves from the third stop 92 to the terminus 93 of the channel 84, the guide 149 moves downward such that the guide pivot 134 moves downward and the third stop 141 moves below the first drive 118, and the first drive 118 resets.

The following describes in detail the working procedure of the surgical instrument according to the present embodiment, from the point of view of the guide 149, for performing the feeding and clamping actions:

the operator presses the wrench 22 so that the guide 149 can move from the start point 89 to the first stop point 90, the second stop point 91, the third stop point 92, and the end point 93 in this order.

During the movement of the guide member 149 from the start point 89 to the first stop point 90, the guide member 149 enters the slave channel 84 from the master channel 83, the guide pivot member 134 rotates upward, the first stop 135, the second stop 138, and the third stop 141 all move upward, and the first driver 118 moves to the distal end of the first stop 135.

During movement of the guide 149 from the first stop 90 to the second stop 91, the guide 149 moves in the passage 84 and the first driver 118 moves from the distal end of the first stop 135 to the distal end of the second stop 138.

During the movement of the guide member 149 from the start point 89 to the second stop point 91, the guide post 123 moves on the first guide surface 129, the first clutch member is detachably connected to the first driving member 118, and the switching mechanism drives the first driving member 118 to move.

During the movement of the guide 149 from the second stop point 91 to the third stop point 92, the guide 149 moves from the channel 84 and the first driver 118 moves distally between the second stop 138 and the third stop 141. The guide post 123 continues to move on the first guide surface 129, and when the guide post 123 moves onto the slope between the first guide surface 129 and the second guide surface 130, the guide member 149 will reach the third stop point 92 without reaching the third stop point 92, and when the guide post 123 is on the slope, the first clutch member remains detachably connected to the first driving member 118, and the switching mechanism drives the first driving member 118 to move.

When the guide member 149 reaches the third stop 92, the guide member 149 is still moving from the channel 84, the first driver 118 just reaches the distal end of the third stop 141, and the third stop 141 abuts the proximal end of the first driver 118. At this time, the guide post 123 just reaches the second guide surface 130, the first clutch member is separated from the first driving member 118, the second clutch member 131 (i.e. the distal end surface of the base 121) abuts against the second driving member 120, and the switching mechanism can drive the second driving member 120 to move. When the guide 149 reaches the third stop 92, the wrench 22 is in the intermediate position, at which point the first driver 118 has delivered the clip 30 to the ready position for the clip delivery completion time.

During the process of moving the guide 149 from the third stop 92 to the terminus 93, the guide 149 moves from the channel 84 such that the guide pivot 134 does not move downward such that the third stop 141 remains in abutment with the proximal end of the first driver 118. The guide post 123 moves along the second guide surface 130, the second clutch member 131 abuts against the second driving member 120, and the switching mechanism drives the second driving member 120 to move.

When the guide member 149 reaches the end point 93, the guide member 149 enters the main passage 83, the guide pivot member 134 moves downward, the third stopping portion 141 is separated from the first driving member 118, and the first driving member 118 is reset by the third reset member 132. At this time, the guide post 123 is located on the second guide surface 130, and the second clutch member 131 abuts against the second driving member 120. When guide 149 reaches terminus 93, wrench 22 is in the closed position, at which point clip 30 in the ready position is applied to tissue or a blood vessel for the time of clip application completion. When the wrench 22 is released, the second driving member 120 resets under the action of the fourth resetting member 133, and the switching mechanism resets under the action of the second driving member 120 to the position sleeved on the first driving member 118, so that the wrench 22 resets under the drive of the switching mechanism. Since the base 121 of the switching mechanism has a through hole, the switching mechanism can move proximally to fit over the first driving member 118.

In this embodiment, when the guide member 149 moves from the starting point 89 to the first stopping point 90 in the guide channel 82, the first driving member 118 has pushed the clip 30, the position of the clip 30 has changed, if the guide member 149 moves back from the first stopping point 90 to the starting point 89, the first stopping portion 135 moves down to prevent the first driving member 118 from moving back, and if the first driving member 118 moves back, the next time the clip feeding operation is performed, the phenomena of clip feeding interference and clip feeding error occur.

Thus, in this embodiment, the guide 149 is locked by the guide channel 82 when the guide 149 moves from the start point 89 to the first stop point 90 in the guide channel 82, and the guide 149 cannot retract from the first stop point 90 to the start point 89. Specifically, referring to fig. 42, the slave channel 84 includes a blocking wall 86. The main channel 83 comprises a first wall 85 extending from a starting point 89 to connect with a blocking wall 86, the first wall 85 and the blocking wall 86 being at right or acute angles. This simple angular design of the guide channel 82 ensures that the blocking wall 86 effectively prevents the guide 149 from retracting from the first stop point 90 to the start point 89.

To enable the guide 149 to move from the third stop 92 to the terminus 93, the secondary channel 84 further includes a guide wall 88. The main channel 83 further comprises a second wall 87 extending from the end point 93 to connect with the guide wall 88, the second wall 87 making an obtuse angle with the guide wall 88. This simple angular design of the guide channel 51 ensures that the guide 149 can move from the third stop 92 to the end 93.

In this embodiment, the wrench 22 has a forward motion and a reset motion. Specifically, from an initial time, the user keeps operating the wrench 22, and the wrench 22 moves from the open position to the intermediate position and then to the closed position. The movement defining the direction of the wrench 22 towards the closed position is a forward movement of the wrench 22. Accordingly, the movement defining the direction of the wrench 22 toward the open position is a reset movement of the wrench 22.

Upon forward movement of wrench 22, the path of movement of guide 149 in guide channel 82 is a first path. Upon return movement of the wrench 22, the path of movement of the guide 149 in the guide channel 82 is the second path. The first motion path includes a master channel 83 and a slave channel 84, and the second motion path includes the master channel 83 and does not include the slave channel 84.

When the wrench 22 reaches the closed position, the user releases the wrench 22, the switching mechanism moves to reset proximally, the wrench 22 resets under the action of the switching mechanism, and in the process, the second movement path shields the secondary channel 84 without stopping, so that the guide 149 is prevented from entering the secondary channel 84 from the terminal 93 and cannot retract from the first stop point 90 to the starting point 89 during the resetting movement, and smooth resetting of the wrench 22 and the stop mechanism is ensured.

To achieve the above-described shielding of the slave channel 84, the surgical instrument of the present embodiment further includes a path switching member 94, a positioning mechanism, and a path driving member.

The path switching member 94 has an open state and a closed state. When the path switch 94 is in the open state, the path switch 94 clears the slave channel 84 to allow the guide 149 to enter or exit the slave channel 84. When the path switch 94 is in the closed state, the path switch 94 shields the slave channel 84 from the guide 149 entering the slave channel 84.

Referring to fig. 43-44, a path switch 94 is coupled to wrench 22. The path switching member 94 is provided between the wrench 22 and the first head case 20. As described above, the wrench body 23 is provided with the pivot end 26 pivotally connected to the housing, and the wrench 22 can be rotated about the pivot end 26. The grip portion 24 of the wrench 22 is disposed on one side of the pivot end 26, and the path switching member 94 is disposed on the opposite side of the pivot end 26.

Referring to fig. 45 to 46, the path switching member 94 includes a pivoting portion 95, a first triggering portion 96, a second triggering portion 97, and an executing portion 98. The pivot portion 95 of the path switching member 94 is connected to the wrench body 23 through a fourth pin 100. The path switching member 94 is rotatable about the fourth pin 100 relative to the wrench 22. The first trigger portion 96 is disposed on one side of the pivot portion 95, the second trigger portion 97 is disposed on the other side opposite to the pivot portion 95, the actuator 98 is disposed on the first trigger portion 96, the actuator 98 is disposed corresponding to the slave channel 84 of the guide channel 82, and the actuator 98 is used for shielding the slave channel 84. Preferably, the first trigger portion 96 is at an obtuse angle to the second trigger portion 97, and the obtuse angle is toward the first head housing 20. In other embodiments, the first trigger portion 96 and the second trigger portion 97 may be at an acute angle or a right angle therebetween.

Referring to fig. 44 in combination with fig. 46, the actuator 98 extends with a flap 99 toward the opening 13 of the main channel 83, and when the actuator 98 is tilted toward the wrench 22, the flap 99 can close the opening 13 of the main channel 83 to close the secondary channel 84 such that the guide 149 cannot enter the secondary channel 84 from the opening 13, and the guide 149 can only move along the flap 99 to the start point 89 of the main channel 83 at the end point 93 of the main channel 83.

When the path switching member 94 rotates about the fourth pin shaft 100 at the pivot portion 95 with respect to the wrench 22, the first trigger portion 96 is caused to rotate toward the inner wall of the first head case 20 or toward the wrench 22, when the first trigger portion 96 rotates toward the inner wall of the first head case 20, the second trigger portion 97 rotates toward the wrench 22, and when the first trigger portion 96 rotates toward the wrench 22, the second trigger portion 97 rotates toward the inner wall of the first head case 20.

The positioning mechanism includes a convex portion 105, a first concave portion 106, and a second concave portion 107. Referring to fig. 46, the convex portion 105 is provided to the pivot portion 95 of the path switching member 94. When the path switching member 94 rotates around the fourth pin shaft 100, the convex portion 105 rotates in synchronization therewith. Referring to fig. 40, the first recess 106 and the second recess 107 are both provided to the wrench body 23. The protruding portion 105 has elasticity such that the protruding portion 105 can move from within the first recess 106 into the second recess 107 and also from within the second recess 107 into the first recess 106.

When the protruding portion 105 is located in the second recessed portion 107, the second trigger portion 97 is inclined toward the wrench 22, the first trigger portion 96 is inclined toward the inner wall of the first head housing 20, and the actuating portion 98 provided to the first trigger portion 96 is also inclined toward the inner wall of the first head housing 20, so that the actuating portion 98 is away from the slave channel 84, and the path switching member 94 is in the open state.

When the protruding portion 105 is located in the first recessed portion 106, the second trigger portion 97 is inclined toward the inner wall of the first head housing 20, the first trigger portion 96 is inclined toward the wrench 22, and the actuating portion 98 provided to the first trigger portion 96 is also inclined toward the wrench 22, so that the actuating portion 98 closes the slave passage 84, and the path switching member 94 is in the closed state.

When no external force acts, the protruding portion 105 is operatively accommodated in the second recess 107 or the first recess 106, and the protruding portion 105 can be limited by the second recess 107 or the first recess 106, so that the path switching member 94 cannot rotate around the fourth pin shaft 100, and the path switching member 94 is always kept in the open state or the closed state.

The path switch 94 and the path driver move relative to each other during movement of the wrench 22. The path driving member is capable of driving the path switching member 94 to switch between an open state and a closed state. Specifically, the path driving member drives the path switching member 94 to rotate about the fourth pin 100 relative to the wrench 22 such that the convex portion 105 moves between the second concave portion 107 and the first concave portion 106. When the protruding portion 105 of the path switching member 94 is operatively accommodated in the second recess 107, the path switching member 94 needs to be rotated about the fourth pin shaft 100 in the first predetermined direction by a first angle to move the protruding portion 105 into the first recess 106. When the protruding portion 105 of the path switching member 94 is operatively accommodated in the first recess 106, the path switching member 94 needs to be rotated about the fourth pin shaft 100 in a second predetermined direction by a second angle to move the protruding portion 105 into the second recess 107. The first preset direction and the second preset direction are opposite to each other, for example, when the first preset direction is clockwise, the second preset direction is counterclockwise.

Referring to fig. 47, the path driving member includes a first guide rib 101 and a second guide rib 103, and the first guide rib 101 and the second guide rib 103 are each provided to an inner wall of the first head casing 20. The first guide rib 101 has a first guide slope 102, and the second guide rib 103 has a second guide slope 104.

At an initial time, the user does not operate the wrench 22, and the wrench 22 is located at the open position, and at this time, the path switching member 94 is located at the second guide rib 103 and is disengaged from the first guide rib 101. In response to movement of the wrench 22 from the open position to the closed position, the wrench 22 is able to move the path switching member 94 from the second guide rib 103 to the first guide rib 101. When the wrench 22 is in the closed position, the path switching member 94 is located at the first guide rib 101, and the path switching member 94 is disengaged from the second guide rib 103. In response to movement of the wrench 22 from the closed position to the open position, the wrench 22 is able to move the path switching member 94 from the first guide rib 101 to the second guide rib 103. Specifically:

referring to fig. 48A, initially, when the wrench 22 is in the open position, the first trigger 96 is disengaged from the first guide rib 101, the second trigger 97 is located between the second guide rib 103 and the wrench 22, the protrusion 105 is operatively received in the second recess 107, the second trigger 97 is inclined toward the wrench 22, the first trigger 96 is inclined toward the inner wall of the first head housing 20, the actuator 98 clears the slave channel 84, and the path switching member 94 is in the open state.

Referring to fig. 48B, during the process before the wrench 22 moves from the open position to the closed position, the wrench 22 drives the path switching member 94 to move from the second guide rib 103 to the first guide rib 101, when the first trigger 96 moves onto the first guide inclined surface 102 of the first guide rib 101, the first trigger 96 continues to move along the first guide inclined surface 102, and the first guide inclined surface 102 applies a force to the first trigger 96, so that the path switching member 94 starts to rotate around the fourth pin shaft 100 in the first preset direction, and the protrusion 105 is still operatively accommodated in the second recess 107 due to insufficient rotation, i.e., the first rotation angle, and the second recess 107 limits the protrusion 105, so that the path switching member 94 is always kept in the open state. The guide 149 is movable within the slave channel 84 during the forward movement of the wrench 22 from the open position to the closed position.

Referring to fig. 49A, at the moment when the wrench 22 reaches the closed position, the first trigger portion 96 of the path switching member 94 moves along the first guide inclined surface 102 between the first guide rib 101 and the wrench 22, so that the path switching member 94 rotates around the fourth pin shaft 100 by a first angle in a first preset direction, the protrusion 105 moves from the second recess 107 into the first recess 106, and the path switching member 94 is switched to the closed state.

Referring to fig. 49B, in the process before the wrench 22 is reset from the closed position to the open position and reaches the open position, the path switching member 94 is moved from the first guide rib 101 to the second guide rib 103 under the driving of the wrench 22, when the second trigger portion 97 moves onto the second guide inclined surface 104 of the second guide rib 103, the second trigger portion 97 continues to move along the second guide inclined surface 104, and the second guide inclined surface 104 applies a force to the second trigger portion 97, so that the path switching member 94 starts to rotate around the fourth pin shaft 100 in the second preset direction, and due to the fact that the path switching member 94 does not rotate by a sufficient angle, i.e., does not rotate by the second angle, the protrusion 105 is still operatively accommodated in the first recess 106, the first recess 106 limits the protrusion 105, and the path switching member 94 is always kept in the closed state. The guide 149 cannot move within the slave channel 84 during the return movement of the wrench 22 from the closed position to the open position and until the open position is reached.

Referring to fig. 48A, when the wrench 22 is reset from the closed position to the open position and reaches the open position, the second trigger portion 97 of the path switching member 94 moves along the second guide slope 104 between the second guide rib 103 and the wrench 22, so that the path switching member 94 rotates about the fourth pin shaft 100 by a second angle in the second preset direction, the protrusion 105 moves from the first recess 106 into the second recess 107, and the path switching member 94 is switched to the open state.

To sum up, in the surgical instrument of the present embodiment, during the adjustment of the angle of the end effector 1, the holding assembly 111 can hold the articulation member 47 in the current rotational position until the locking member 62 is moved to the locking position to lock the articulation member 47 before the locking member 62 is moved to the locking position. Thus, in the process that the end effector 1 rotates by a preset angle relative to the shaft assembly 2 and before the rotational movement of the end effector 1 is locked, the end effector 1 can be stably maintained at the preset angle until the rotational movement thereof is locked, and the end effector 1 is prevented from shaking to change the angle thereof, so that the angle adjustment of the end effector 1 is more accurate.

In the surgical instrument of this embodiment, after the first movement of the actuating member 77 causes the locking member 62 to be in the unlocked position, the second movement of the actuating member 77 causes the end effector 1 to rotate by a preset angle relative to the shaft assembly 6, that is, in the process of adjusting the angle of the end effector 1, only one time of unlocking is needed, so that the end effector 1 can rotate by the preset angle relative to the shaft assembly 6 in order to meet the use requirement in the unlocked state, the adjustment of the angle of the end effector is not required to be performed by complicated operations, the process is simple, the time consumption is less, and the operation is convenient.

When the actuating member 77 does first movement, the end effector 1 does not rotate, the actuating member 77 does second movement to enable the end effector 1 to rotate relative to the rod body assembly 6, the second movement of the actuating member 77 has relevance to the rotation of the end effector 1, and the first movement of the actuating member 77 does not influence the relevance, so that the movement amount of the second movement of the actuating member 77 can intuitively indicate the rotation angle of the end effector 1, and an operator can expect the rotation angle of the end effector 1 through the second movement of the actuating member 77, thereby being convenient for the operator to adjust the rotation angle of the end effector 1 and improving the convenience of operation.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A surgical instrument, comprising:

a shaft assembly;

an end effector;

2. The surgical instrument of claim 1, wherein the articulation member has a plurality of limit slots and the retention assembly has a retention end that engages one of the limit slots to maintain the position of the articulation member.

3. The surgical instrument of claim 2, wherein the retention assembly includes a resilient member and a stop member, the stop member being coupled to the resilient member, a distal end of the stop member constituting a holding end of the retention assembly, the resilient member biasing the stop member toward the articulation member to engage the distal end of the stop member with one of the limit slots.

4. The surgical instrument of claim 1, wherein the articulation member has a plurality of limit slots;

5. The surgical instrument of claim 2, wherein the abutment end of the retention assembly and the locking member respectively engage different ones of the limit slots when the locking member is in the locked position.

6. The surgical instrument of claim 1, further comprising a clip cartridge and a clip feed assembly, the clip cartridge comprising a clip, the clip feed assembly moving to urge the clip of the clip cartridge into the end effector in response to applying a force to the clip feed assembly.

7. The surgical instrument of claim 6, wherein the cartridge is removably disposed to the articulation member.

8. The surgical instrument of claim 1, further comprising an actuation mechanism comprising an actuation member having a first motion and a second motion;

9. The surgical instrument of claim 8, wherein the articulation locking mechanism further comprises a first reset member that stores a first energy during movement of the locking member from the locked position to the unlocked position, the first energy being released, the locking member being moved to the locked position by the first reset member.

10. The surgical instrument of claim 8, wherein the articulation mechanism further comprises an articulation drive assembly for driving rotation of the articulation member;

11. The surgical instrument of claim 10, wherein the articulation has an initial position and a plurality of rotational positions, the end effector defining a first longitudinal axis and the shaft assembly defining a second longitudinal axis;

12. The surgical instrument of claim 11, wherein the clip applier further comprises a positioning assembly having an abutment end, the first transmission member having a positioning slot, the abutment end of the positioning assembly engaging the positioning slot when the articulation member is in the initial position, the abutment end of the positioning assembly being disengaged from the positioning slot when the articulation member is in one of the rotational positions.