AnastomatTechnical Field
The utility model relates to the technical field of medical instruments, in particular to an anastomat.
Background
In general, staplers are widely used for tissue suturing in surgical procedures. A stapler can generally consist of an end effector at a distal end, a handle at a proximal end, and an elongate shaft assembly coupled between the end effector and the handle. The elongate shaft assembly has an outer sleeve with a drive rod disposed therein that is axially slidable back and forth along the outer sleeve, the drive rod typically being connectable at a proximal end to an actuation mechanism of the handle and at a distal end to an end effector for braking tissue operated by the end effector. The end effector can generally include a knife block movable between a proximal end and a distal end, and a cartridge assembly and anvil that are pivotally connected to be openable and closable relative to each other. Currently, the stapling machines on the market mostly use a knife holder with an i-beam structure to close the end effector, such as the stapling machine disclosed in patent CN 114246623a, in which the movement of the knife holder causes the tissue to be severed.
Disclosure of utility model
The utility model aims to provide a novel anastomat, which cancels a knife rest of an I-beam structure, does not damage a tissue structure, can realize the opening or closing of a nail anvil and a nail bin assembly by driving a first driving assembly to drive an outer sleeve to move through a trigger, and can realize the automatic locking of a closed state by arranging a clamping locking assembly.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A stapler, the stapler comprising:
A handle;
a trigger operably connected to the handle;
A drive assembly including a first drive assembly including a pusher member distally movable to a first position in response to the trigger, a pusher return spring disposed between the handle and the pusher member, the pusher return spring causing the pusher member to always have a tendency to move proximally to a second position, and a second drive assembly configured to be responsive to the trigger to produce a firing action;
a clip lock assembly operably abutting on the pusher member, the clip lock assembly capable of holding the pusher member in the first position;
An elongate shaft assembly coupled to the handle, the elongate shaft assembly including an outer sleeve at least partially coupled to the pusher, the outer sleeve having a first mating block at a distal end thereof extending toward an axial direction thereof;
And an end effector coupled to the elongate shaft assembly, the end effector including an anvil, a cartridge assembly having staples, and a staple pusher assembly configured to respond to the firing motion from the second drive assembly and to eject the staples from the cartridge assembly to staple target tissue, one of the anvil and cartridge assembly being coupled to the elongate shaft assembly, the other being rotatably and slidably coupled to the one and having a second engagement block extending proximally of the proximal end thereof in a direction approaching the first engagement block,
When the pushing piece is positioned at the second position, the first matching block is abutted against the second matching block so as to separate the nail anvil and the nail bin assembly, and the end effector is in an open state;
When the pushing piece responds to the trigger and moves from the second position to the first position, the pushing piece drives the outer sleeve to move towards the distal end so that the first matching block releases the abutting force on the second matching block, the nail anvil and the nail bin assembly are close, and the end effector is in a closed state.
Preferably, the anvil is coupled to the elongate shaft assembly. Most of the existing anastomat adopts a form of fixing a nail bin assembly and movably arranging a nail anvil, and the nail bin assembly has a large volume, so that the nail bin assembly is not beneficial to being inserted into a narrow tissue gap in actual clinical use. Through fixed and nail storehouse subassembly activity setting with the nail anvil, be convenient for insert the nail anvil in the narrow tissue clearance, the wound that causes the patient is less.
Preferably, the distal end of the outer sleeve is provided with a groove, the first matching block is arranged on the distal side wall of the groove and extends obliquely from the distal end to the proximal direction,
The cartridge assembly has an inclined surface that mates with the first mating block.
Preferably, the intermediate regions of the first and second mating blocks have channels that allow movement of the push pin assembly.
Preferably, the clip locking assembly includes an operating portion at least partially exposed to the handle, a clip locking member connected to the operating portion and rotatably provided to the handle, and a clip locking member return elastic member connected between the handle and the clip locking member and having a tendency to move toward a locking position at all times, the clip locking member abutting on the pushing member and preventing proximal movement of the pushing member when the clip locking member is in the locking position.
Further preferably, the pushing member has an abutment step, the clip lock stopper abuts on a side surface of the abutment step when the clip lock stopper is in the lock position, and the clip lock stopper is rotatable in a direction away from the abutment step to unlock the pushing member when the operation portion is operated.
Preferably, the proximal end of the outer sleeve passes through the pushing piece resetting elastic piece and is clamped on the pushing piece.
Preferably, the elongate shaft assembly further comprises a rotational joint disposed at a distal end region of the elongate shaft assembly, the outer sleeve comprising a first outer sleeve portion having the first mating block at one end and being rotatably connected at the other end to the rotational joint, a second outer sleeve portion having one end connected to the pusher and being rotatably connected at the other end to the rotational joint,
The stapler also includes a steering mechanism disposed on the handle and configured to control rotation of the end effector.
In some embodiments, the steering mechanism comprises an exposed steering knob which can rotate in an operating mode, a steering wheel connected to the steering knob, an eccentric rotating shaft which is connected to the steering wheel, is arranged on the connecting seat and is not coaxial with the steering wheel, a push rod component which is movably arranged in the outer sleeve and is connected to the end effector, and a sliding piece connected to the push rod component, wherein the eccentric rotating shaft is rotationally and slidingly arranged on the sliding piece, and when the steering knob is operated to rotate, the eccentric rotating shaft rotates and drives the sliding piece to move along the axial direction of the outer sleeve, so that the push rod component is driven to rotate along with the end effector.
Further, the steering mechanism further comprises a steering wheel reset elastic piece which is arranged between the steering wheel and the steering knob and enables the steering wheel to have a downward movement trend, and a positioning disc which is fixedly arranged between the steering wheel and the connecting seat, wherein one side of the positioning disc, which faces the steering wheel, is provided with a plurality of concave parts which extend along the radial direction of the positioning disc, one end of the steering wheel, which faces the positioning disc, is provided with convex parts which are matched with the concave parts, and when the steering knob is operated to rotate, the convex parts can overcome the elasticity of the steering wheel reset elastic piece and enter into one concave part of the positioning disc from the other concave part. The design of the concave part is convenient for an operator to identify the rotation angle.
Preferably, the click is made when the protrusion enters one recess of the positioning disc from the other recess.
Preferably, the trigger is rotatably connected to the handle and a trigger return spring is provided between the trigger and the handle, the trigger return spring causing the end of the trigger which engages the pusher to always have a tendency to move away from the pusher.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
The anastomat provided by the utility model cancels the I-shaped Liang Daojia, does not damage the tissue structure, can realize the opening or closing of the nail anvil and the nail bin assembly by driving the first driving assembly to drive the outer sleeve to move through the trigger, can realize the automatic locking of the closed state through the clamping locking assembly, and can drive the outer sleeve to automatically reset after the locking is released, so that the anastomat has the advantages of simple structure and convenience in use, and can realize the opening or closing of the nail anvil and the nail bin assembly under any swinging angle.
Drawings
FIG. 1 is a schematic view of the stapler of embodiment 1;
FIG. 2 is a schematic view of the stapler of embodiment 1, showing only a part of the handle;
FIG. 3 is an exploded view of the stapler of example 1;
FIG. 4 is a schematic view of the handle, drive assembly and closure lock assembly of embodiment 1, wherein the first drive assembly is in the second position and the closure lock is in the unlocked position;
FIG. 5 is a schematic view of another angle of the handle, drive assembly and closure lock assembly of embodiment 1, wherein the first drive assembly is in the second position and the closure lock is in the unlocked position;
FIG. 6 is a schematic view of the end effector of embodiment 1 in an open state;
FIG. 7 is a schematic view of the handle, drive assembly and closure lock assembly of embodiment 1, wherein the first drive assembly is in a first position and the closure lock is in a locked position;
FIG. 8 is a schematic view of the end effector of embodiment 1 in a closed position;
FIG. 9 is a schematic view of the structure of the cartridge seat of embodiment 1;
FIG. 10 is a schematic view of the staple anvil of example 1;
Fig. 11 is a schematic structural view of a pusher of embodiment 1;
Fig. 12 is a schematic structural view of the steering mechanism of embodiment 1 (steering rod and sleeve are not shown);
wherein, 1, a handle;
2. a trigger, a trigger reset elastic piece;
3. The first driving component, 31, a pushing piece, 311, a pushing piece groove, 312, an abutting step, 32, a pushing piece reset elastic piece;
4. The second driving component, 41, a firing bar, 42, a first connecting piece, 43, a second connecting piece, 44, a firing block, 45 and a firing bar reset elastic piece;
5. A clip lock assembly; 51, an operation part, 52, a clip locking fixed piece, 53, a clip locking fixed piece resetting elastic piece;
6. Outer sleeve 61, first outer sleeve part 611, outer sleeve groove 612, first matching block 6121, first matching block channel 62, rotary joint 63, second outer sleeve part;
7. end effector, 71, anvil, 711, anvil, 7111, teeth, 712, anvil body, 72, cartridge assembly, 721, cartridge seat, 7211, second mating block, 7212, angled face, 7213, second mating block channel, 722, cartridge, 73, staple pusher, 74, staple pusher;
8. steering mechanism, 81, steering knob, 82, steering wheel, 821, convex part, 83, connecting seat, 84, eccentric rotating shaft, 85, steering rod, 86, sleeve, 87, sliding piece, 871, sliding piece chute, 88, steering wheel reset elastic piece, 89, positioning disc, 891, concave part;
9. Steering locking mechanism, 91, steering locking piece, 92, steering locking elastic piece.
Detailed Description
Only certain exemplary embodiments are described briefly herein. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the embodiments of the present utility model, it will be understood that distal refers to the end of the instrument or component that is distal from the operator, proximal refers to the end of the instrument or component that is proximal to the operator, axial refers to the direction parallel to the line connecting the distal end of the instrument or component to the center of the proximal end, and inner and outer refer to positions defined relative to the center of the instrument or component, wherein inner is the position that is proximal to the center of the instrument or component and outer is the position that is distal from the center of the instrument or component, and upper and lower refer to the orientation of the instrument in the actual use or operational state. The above description of orientation words is merely for convenience in describing embodiments of the present utility model and for simplicity of description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting embodiments of the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In embodiments of the utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The above disclosure provides many different implementations, or examples, for implementing different structures of embodiments of the utility model. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. Of course, they are merely examples and are not intended to limit embodiments of the present utility model. Furthermore, embodiments of the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
The utility model will be further described with reference to examples of embodiments shown in the drawings.
Example 1
Referring to fig. 1-3, the stapler includes a handle 1, a trigger 2 operably coupled to the handle 1, an elongate shaft assembly coupled to the handle 1, and an end effector 7 coupled to the elongate shaft assembly. End effector 7 is used to staple tissue after access to an endoscopic surgical channel and includes an anvil 71, a cartridge assembly 72, and a staple pusher assembly. Wherein anvil 71 is coupled to an elongate shaft assembly, a cartridge assembly 72 is rotatably and slidably disposed on anvil 71 and is operable to move toward anvil 71 to a closed condition or to move away from anvil 71 to an open condition, and a staple pusher assembly configured to respond to a firing motion and to push staples out of cartridge assembly 72 to staple target tissue, the staple pusher assembly including a staple pusher 73 and a staple pusher 74 movably disposed in the elongate shaft assembly, the staple pusher 73 being coupled to and distally disposed from the staple pusher 74.
Generally, the thickness of the cartridge assembly 72 is generally larger than that of the anvil 71, and the conventional anastomat mostly adopts a mode that the cartridge assembly 72 is fixed and the anvil 71 is movably arranged, so that the cartridge assembly 72 is not beneficial to being inserted into narrow tissues, and the cartridge assembly 72 is very likely to cause trauma to the tissues after being inserted, and the inventor facilitates the insertion of the smaller-sized anvil 71 into the narrow tissue gap by fixing the anvil 71 and movably arranging the cartridge assembly 72, and simultaneously can reduce the trauma to a patient.
Further, anvil 71 includes an anvil 711 coupled to the elongate shaft assembly, and an anvil body 712 disposed on anvil 711 and having a staple-abutting surface. As shown in fig. 10, the staple anvil 711 is provided with grooves on both side surfaces of the proximal end portion thereof, and the proximal end portion of the staple anvil 711 is further provided with a steering shaft extending upward and a plurality of teeth 7111 on the proximal end surface thereof. Cartridge assembly 72 includes cartridge housing 721, cartridge 722 with staples. As shown in fig. 9, the proximal end of cartridge housing 721 has shafts extending outwardly on opposite sides thereof and adapted to mate with the slots of anvil 711, the shafts being rotatably and slidably disposed within the slots.
To drive the cartridge assembly 72 in rotation relative to the anvil 71, the inventors have driven the cartridge assembly 72 open or closed by movement of the elongate shaft assembly by providing corresponding engagement blocks on the elongate shaft assembly, cartridge housing 721, respectively, as follows. The elongate shaft assembly includes an outer cannula 6 and a rotational joint 62 disposed at a distal region of the outer cannula 6. Wherein, the outer sleeve 6 comprises a first outer sleeve part 61 with a proximal end rotatably connected to the rotary joint 62, and a second outer sleeve part 63 with a distal end rotatably connected to the rotary joint 62, the distal end of the first outer sleeve part 61 is provided with an outer sleeve groove 611, and the distal side wall of the outer sleeve groove 611 is provided with a first matching block 612 extending obliquely downwards from the distal end to the proximal end. The cartridge assembly 72 and the proximal end portion of the anvil 71 are positioned within the first outer sleeve portion 61, and the proximal end portion of the cartridge housing 721 has a second engagement block 7211 extending in a direction toward (in this embodiment, upwardly) the first engagement block 612, and an inclined surface 7212 that mates with the first engagement block 612. When the outer sleeve 6 moves along the axial direction of the outer sleeve 6 towards the proximal end, the first matching block 612 abuts against the second matching block 7211 and drives the cartridge assembly 72 to move away from the anvil 71 so as to open the cartridge assembly 72, and when the outer sleeve 6 moves along the axial direction of the outer sleeve 6 towards the distal end, the first matching block 612 releases the abutting force on the second matching block 7211, and the distal end of the outer sleeve 6 contacts the cartridge assembly 72 and drives the cartridge assembly 72 to move towards the direction approaching the anvil 71 so as to close the cartridge assembly 72. The intermediate regions of the first and second mating blocks 612, 7211 have channels that allow movement of the push pin assembly, i.e., first and second mating block channels 6121, 7213.
In order to achieve the movement of the outer sleeve 6, the stapler further comprises a drive assembly and a clip lock assembly 5.
The drive assembly includes a first drive assembly 3 for driving the cartridge assembly 72 open or closed. As shown in fig. 4, 5 and 7, the first drive assembly 3 includes a pusher 31 that is movable distally to a first position in response to the trigger 2, and a pusher return spring 32 disposed between the handle 1 and the pusher 31, the pusher return spring 32 causing the pusher 31 to always have a tendency to move proximally to a second position. The proximal end of the second outer sleeve part 63 passes through the pusher return elastic member 32 and is clamped on the pusher groove 311 of the pusher 31, and when the pusher 31 moves, the outer sleeve 6 is driven to move synchronously. In an initial state, under the elastic force of the pusher reset elastic member 32, the pusher 31 is in the second position (shown in fig. 4 and 5) and drives the cartridge assembly 72 to open relative to the anvil 71 (described in fig. 6), and when the pusher 31 moves towards the first position (shown in fig. 7) in response to the trigger 2, the pusher 31 drives the outer sleeve 6 to move distally, so that the cartridge assembly 72 is closed relative to the anvil 71 (shown in fig. 8).
The clip lock assembly 5 is capable of holding the pusher 31 in a first position and includes an operating portion 51 at least partially exposed to the handle 1, a clip lock 52 connected to the operating portion 51 and rotatably provided to the handle 1, and a clip lock return elastic member 53 connected between the handle 1 and the clip lock 52 and allowing the clip lock 52 to always have a tendency to move toward the locked position, the clip lock 52 abutting against the pusher 31 and preventing proximal movement of the pusher 31 when the clip lock 52 is in the locked position (shown in fig. 7), the pusher 31 being in the first position. Specifically, as shown in fig. 11, the pusher 31 has an abutment step 312, and when the pinch lock member 52 is in the locked position, the pinch lock member 52 abuts against the abutment step 312 side, and when the operation portion 51 is operated, the pinch lock member 52 can be turned in a direction away from the abutment step 312 (turned upward in this embodiment) to release the lock of the pusher 31.
The drive assembly also includes a second drive assembly 4 configured to be responsive to the trigger 2 to produce a firing motion. The second drive assembly 4 includes a firing bar 41 coupled to the staple pusher bar 74, a firing block 44 for driving movement of the firing bar 41, a first link 42 having one end coupled to the firing block 44 and the other end coupled to the trigger 2, a second link 43 operably engaged with the firing block 44, and a firing bar return spring 45, the firing bar return spring 45 causing the firing bar 41 to always have a tendency to move toward an initial position. The second connecting piece 43 is connected with the clamp locking piece 52 in a synchronous rotation mode, when the clamp locking piece 52 is located at the locking position, the second connecting piece 43 limits the abutting of the firing block 44 to the firing bar abutting part 411 of the firing bar 41, the trigger 2 is operated, the firing block 44 can drive the firing bar 41 to complete firing action under the driving of the first connecting piece 42, and when the clamp locking piece 52 is separated from the locking position, the second connecting piece 43 enables the firing block 44 to be separated from the firing bar 41, and even if the trigger 2 is operated, the firing action cannot be completed. That is, when the cartridge module 72 is opened, the operating trigger 2 may drive the first drive module 3 to close the cartridge module 72, and the firing motion cannot be achieved at this time, and when the cartridge module 72 is closed, the firing motion cannot be completed by operating the trigger 2.
The trigger 2 is rotatably connected to the handle 1 and a trigger return spring 21 is provided between the trigger 2 and the handle 1, the trigger return spring 21 causing the end of the trigger 2 which engages the pusher 31 to always have a tendency to move away from the pusher 31, i.e. the trigger 2 can be returned under the action of the trigger return spring 21 when the force applied to the trigger 2 is removed.
In this embodiment, the stapler further comprises a steering mechanism 8 provided on the handle 1 and configured to control the rotation of the end effector 7. As shown in fig. 3 and 12, the steering mechanism 8 includes an exposed and operatively rotatable steering knob 81, a steering wheel 82 coupled to the steering knob 81, a coupling seat 83 coupled to the steering wheel 82, an eccentric rotary shaft 84 provided to the coupling seat 83 and not coaxial with the steering wheel 82, a push rod assembly movably provided in the outer sleeve 6 and coupled to the end effector 7, and a slider 87 coupled to the push rod assembly, the eccentric rotary shaft 84 being rotatably and slidably provided in a slider chute 871 of the slider 87, and when the steering knob 81 is operated to rotate, the eccentric rotary shaft 84 rotates and drives the slider 87 to move in the axial direction of the outer sleeve 6, thereby driving the push rod assembly to rotate with the end effector 7. Further, the push rod assembly includes a steering rod 85 movably disposed within the outer sleeve 6 and a sleeve 86. The steering rod 85 is connected to the sleeve 86 and has a waist-shaped groove at its distal end, and the steering shaft of the anvil 711 is rotatably and slidably disposed in the waist-shaped groove, and the sleeve 86 is connected to the slider 87 and moves in synchronization with the slider 87.
The steering mechanism 8 further comprises a steering wheel resetting elastic member 88 arranged between the steering wheel 82 and the steering knob 81 and enabling the steering wheel 82 to have a downward movement trend, and a positioning disc 89 fixedly arranged between the steering wheel 82 and the connecting seat 83, wherein one side of the positioning disc 89 facing the steering wheel 82 is provided with a plurality of concave parts 891 extending along the radial direction of the positioning disc, one end of the steering wheel 82 facing the positioning disc 89 is provided with a convex part 821 matched with the concave parts 891, when the steering knob 81 is operated to rotate, the convex part 821 can overcome the elastic force of the steering wheel resetting elastic member 88 and enter one concave part 891 of the positioning disc 89 into the other concave part 891, and when the convex part 821 enters the other concave part 891 from the one concave part 891 of the positioning disc 89, clicking sound is generated. The design of the recess 891 facilitates the operator to identify the degree of rotation.
In this embodiment, the stapler further comprises a steering lock mechanism capable of locking the rotation angle of the end effector, the steering lock mechanism comprising a steering lock 91 slidably provided in the outer sleeve 6 and capable of being inserted into the teeth 7111 to lock the end effector, and a steering lock elastic member 92 which makes the steering lock 91 always have a movement in a direction approaching to the teeth 7111. The steering locking piece 91 is provided with an unlocking protrusion, the outer sleeve 6 is provided with an unlocking matching part matched with the unlocking protrusion, when the outer sleeve 6 moves towards the proximal end, the unlocking matching part is abutted against the unlocking protrusion and drives the steering locking piece 91 to move towards the direction far away from the teeth 7111, so that the locking of the end effector is released, the steering mechanism 8 is operated, the steering of the end effector can be realized, when the outer sleeve 6 moves towards the distal end, the steering locking piece 91 moves towards the direction close to the teeth 7111 until the end effector is inserted into the teeth 7111 under the action of the steering locking elastic piece 92, and the end effector cannot be steered and locked.
The operating principle of the anastomat is as follows:
In the initial state, under the action of the pusher resetting elastic member 32, the pusher 31 is in the second position, and at this time, the first fitting block 612 of the outer sleeve 6 abuts against the second fitting block 7211 of the cartridge assembly 72, and the cartridge assembly 72 is in the open state (as shown in fig. 5 and 6). When the trigger 2 is operated, the trigger 2 rotates and pushes the pushing member 31 to move to the first position towards the distal end against the force of the pushing member reset elastic member 32, the outer sleeve 6 moves towards the distal end synchronously under the driving of the pushing member 31, the first matching block 612 releases the abutting force to the second matching block 7211, the cartridge assembly 72 moves to the closed state, at this time, under the action of the clamping locking member reset elastic member 53, the clamping locking member 52 moves to the locking position and abuts against the pushing member 31 to prevent the pushing member 31 from moving towards the proximal end, so that the cartridge assembly 72 is kept in the closed state (as shown in fig. 7 and 8), meanwhile, the clamping locking member 52 enables the second connecting member 43 to limit the abutting of the firing block 44 to the abutting part of the firing bar, and the trigger 2 is operated again, the trigger 2 rotates and the firing block 44 drives the firing bar 41 to complete the firing action.
The operating part 51 of the clamp locking assembly 5 is rotated upwards, the clamp locking member 52 is rotated upwards and is separated from the locking position, and the pushing member 31 drives the outer sleeve 6 to move to the initial position towards the proximal end under the action of the pushing member resetting elastic member 32, so that the cartridge assembly 72 is opened.
The anastomat at least has the following advantages:
(1) The I-shaped Liang Daojia is canceled, the tissue structure cannot be damaged, the first driving component 3 is driven by the trigger 2 to drive the outer sleeve 6 to move, the opening or closing of the nail anvil 71 and the nail bin component 72 can be realized, meanwhile, the automatic locking of the closed state can be realized by arranging the clamping locking component 5, and after the locking is released, the first driving component 3 can drive the outer sleeve 6 to automatically reset.
(2) Opening or closing of anvil 71 and cartridge assembly 72 at any swing angle may be achieved.
(3) By securing anvil 71 and movably positioning cartridge assembly 72, anvil 71 is facilitated to be inserted into the narrow tissue space while causing less trauma to the patient.
(4) The firing action and the opening and closing actions can be realized by operating the trigger 2, and the device has simple structure and convenient use.
The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.