CN203634230U - Linear suture cutting device - Google Patents

Abstract

Translated fromChinese

本实用新型公开一种直线缝合切割装置，包括：钉仓组件，钉仓组件包括可拆卸地设置于其远端的钉仓、以及与钉仓组件枢轴连接的钉砧；钉仓组件还包括设置于其近端的接管，接管内设置有一推刀杆及置于推刀杆远端的切刀，该切刀上设有止挡部，止挡部可被驱动地抵持钉砧，使钉砧与钉仓闭合，且迫使所述钉砧相对于钉仓保持闭合状态；所述接管内设置有可在该接管轴向上往复移动的挡块，且当钉砧与钉仓闭合后，所述挡块可在所述接管的径向上向所述钉砧的近端施加一支撑力。在钉砧的近端配合设置一可移动的挡块，增强使钉砧与钉仓闭合驱动力，减小了工字型切刀在击发过程中受到的张力，对于该直线切割缝合装置起到保护作用，延长了其使用寿命。

The utility model discloses a linear suture cutting device, which comprises: a staple cartridge assembly, the staple cartridge assembly includes a staple cartridge detachably arranged at the far end of the staple cartridge assembly, and a nail anvil pivotally connected with the staple cartridge assembly; the staple cartridge assembly also includes The connecting pipe arranged at its proximal end is provided with a push knife rod and a cutting knife placed at the far end of the push knife rod in the connecting pipe. The cutting knife is provided with a stopper, and the stopper part can be driven to hold against the nail anvil, so that The nail anvil and the nail bin are closed, and the anvil is forced to maintain a closed state relative to the nail bin; a stopper that can reciprocate in the axial direction of the adapter is arranged in the connecting pipe, and when the nail anvil and the nail bin are closed, The block can apply a supporting force to the proximal end of the anvil in the radial direction of the connecting pipe. A movable block is arranged at the proximal end of the anvil to enhance the driving force for closing the anvil and the staple bin, and reduce the tension of the I-shaped cutter during the firing process, which plays a role in the linear cutting and suturing device. Protective effect, prolonging its service life.

Description

Straight line stitching instrument cutter sweep

Technical field

This utility model relates to technical field of medical instruments, relates in particular to the straight line stitching instrument cutter sweep that a kind of surgery is used.

Background technology

Surgical operation is widely used in wound suture, interior tissue stitching and cutting with straight line stitching instrument cutter sweep.Surgical operation is developed so far, and has more and more tended to Minimally Invasive Surgery.Broad sense, the operation that can reduce wound is all called Minimally Invasive Surgery; Narrow sense, Minimally Invasive Surgery refers to the operation of carrying out at Microendoscopic.General of the operation that Microendoscopic carries out need to be opened several apertures on patient's health, and excision, suture tissue and auxiliary apparatus are stretched in patient body and performed the operation from aperture.The wound that Minimally Invasive Surgery brings to patient is little, and patient can recover in a short period of time, and therefore Minimally Invasive Surgery is more and more subject to people's attention.

In prior art, in straight line stitching instrument cutter sweep percussion process, will be subject to following closely molding due to I shape cutting knife time, nail be to thrust upwards of nail anvil or squeeze the outside tension force etc. of thick tissue, now I shape cutting knife easily fracture in the situation that being subject to very hightension, thus the damage of this medical apparatus and instruments caused.

Summary of the invention

In order to solve the problems of the technologies described above, the purpose of this utility model is, proposes a kind of stressed straight line stitching instrument cutter sweep of I shape cutting knife that reduces.

In order to achieve the above object, the technical scheme that this utility model adopts is:

A kind of straight line stitching instrument cutter sweep, comprising:

Nail bin groupware, described nail bin groupware comprises and is removable installed in the nail bin of its far-end and the nail anvil pivotally connected with described nail bin groupware, and the nail anvil face of described nail anvil and the nail bin face of described nail bin are oppositely arranged and can be by clamp tissue between described nail anvil face and nail bin face;

Described nail bin groupware also comprises the adapter that is arranged at described its near-end, in described adapter, be provided with a push broach bar and be placed in the cutting knife of described push broach bar far-end, described cutting knife is provided with stopper section, described stopper section can be driven to support described nail anvil, make described nail anvil and described nail bin closure, and force described nail anvil to be kept closed with respect to described nail bin;

In described adapter, be provided with the block that can move back and forth in described adapter axially, and when after described nail anvil and described nail bin closure, described block can upwards apply a support force to the near-end of described nail anvil in the footpath of described adapter.

As further improvement of the utility model, in described nail bin groupware, on path, be also provided with the first positive stop lug boss and the second positive stop lug boss moving back and forth of described block, described the first positive stop lug boss is compared to described the second positive stop lug boss away from described cutting knife, and described block is all the time between described the first positive stop lug boss and described the second positive stop lug boss.

As further improvement of the utility model, described straight line stitching instrument cutter sweep also comprises the shell fragment of the bottom surface that is fixedly arranged on described push broach bar, and described shell fragment can be driven and promote described block and move back and forth in described adapter axially by described push broach bar.

As further improvement of the utility model, described shell fragment comprises the first arm, the second arm and the 3rd arm, described the second arm is arranged between described the first arm and described the 3rd arm, between described the first arm and described the second arm, be formed with bendingly the first support division, described the first support division comprises the first supporting surface and the second supporting surface that are selectively held in described block; Between described the 3rd arm and described the second arm, be formed with bendingly the second support division, described the second support division comprises the 3rd supporting surface that can support described block.

As further improvement of the utility model, described shell fragment is greater than the move axially distance of described block in described adapter in the distance that moves axially of described adapter.

As further improvement of the utility model, described block comprise be held on described push broach bar clamping part, be positioned at the convex shoulder of groove that described clamping part forms, the guide portion coordinating with described nail anvil near-end and the maintaining part being connected with described guide portion, described convex shoulder is being subject to, under described the first support division or described the second support division active force, can making described block move back and forth between described the first positive stop lug boss and the second positive stop lug boss.

As further improvement of the utility model, described guide portion compared to described maintaining part away from described the first positive stop lug boss, in described nail anvil closure, during in described nail bin, the near-end of described nail anvil slides to described maintaining part and is finally held in described maintaining part from described guide portion.

As further improvement of the utility model, described the first positive stop lug boss can be positioned at primary importance with block described in described the 3rd supporting surface engagement limits, now described block and described nail anvil relative separation.

As further improvement of the utility model, described the second positive stop lug boss can be positioned at the second position with block described in described the second supporting surface engagement limits, and now the near-end of described nail anvil is held in described maintaining part.

As further improvement of the utility model, described the first supporting surface can be driven and be held in described block and force described block to move to primary importance by described push broach bar.

The beneficial effects of the utility model are; be equipped with a block movably at the near-end of nail anvil; this block can support the near-end of nail anvil in the time of nail anvil and nail bin closure; make nail anvil and the closed driving force of nail bin thereby strengthen; reduce the tension force that I shape cutting knife is subject in percussion process; play a protective role for this straight cuts stitching devices, extended its service life.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of straight line stitching instrument cutter sweep of the present utility model;

Fig. 2 is the nail bin groupware part-structure schematic diagram of straight line stitching instrument cutter sweep of the present utility model;

Fig. 3 is the enlarged drawing of A part in Fig. 2;

Fig. 4 is the block concrete structure schematic diagram of straight line stitching instrument cutter sweep of the present utility model;

Fig. 5 is the wherein profile of a state of straight line stitching instrument cutter sweep of the present utility model;

Fig. 6 is the enlarged drawing of the B part in Fig. 5;

Fig. 7 is the profile of the another state of Fig. 5;

Fig. 8 is the C part enlarged drawing in Fig. 7;

Fig. 9 is the profile of the another state of Fig. 5;

Figure 10 is the D part enlarged drawing in Fig. 9.

The specific embodiment

Below with reference to the specific embodiment shown in the drawings, this utility model is described in detail.But these embodiments do not limit this utility model, the conversion in structure, method or function that those of ordinary skill in the art makes according to these embodiments is all included in protection domain of the present utility model.

The utility model proposes a kind of straight line stitchinginstrument cutter sweep 100 for Minimally Invasive Surgery, as shown in Figures 1 to 4, this straight line stitchinginstrument cutter sweep 100, comprising: pull thetrigger handle 1 and be connected in thebody 2 ofpercussion handle 1, the far-end of thisbody 2 is removably provided with nail bin groupware.This nail bin groupware comprises thenail bin 21 that is removable installed in its far-end, thisnail bin 21 be provided with in one group, be provided with pushing slice of nail, anastomosis staple put nail hole, in the chute of thisnail bin 21, be also provided with the percussion piece for promoting pushing slice of nail.

Nail bin groupware also comprises the nail anvil pivotally connected with it 22, and thenail anvil face 221 of thisnail anvil 22 and thenail bin face 211 ofnail bin 21 are oppositely arranged and can be by clamp tissue betweennail anvil face 221 and nail bin face 211.This nail bin groupware also comprises theadapter 23 that is arranged at its near-end, in thisadapter 23, be provided with movably apush broach bar 24 and be placed in thecutting knife 25 ofpush broach bar 24 far-ends, oncutting knife 25, have projection, be I shape, this I shapecutting knife 25 in the process of advancing first compressing tissue make to expand organize attenuation and evenly, thereby further by nail bin 21 and nail anvil 22 closures, the distal center of this I shapecutting knife 25 is provided with blade, thispush broach bar 24 promotescutting knife 25 in the process of advancing, this blade cuts off the tissue being positioned betweennail bin 21 andnail anvil 22, andpush broach bar 24 promotes percussion piece pushing slice of nail is released tonail bin 21 successively in the process of advancing, and then pushing slice of nail is released the outer also stitching ofnail bin 21 in tissue by anastomosis staple.It should be noted that in addition, the defined near-end of this utility model and far-end are to be all reference with respect to operator, at length, are near-end near one end of operator, are far-end away from one end of operator.

Particularly, be also provided withstopper section 251 oncutting knife 25,stopper section 251 can be driven to supportnail anvil 22, makesnail anvil 22 andnail bin 21 closures, andforces nail anvil 22 to be kept closed with respect to nail bin 21.At length,push broach bar 24 promotescutting knife 25 in the process of advancing,stopper section 251 is held in thebending guide portion 222 of nail anvil, thereby force thesenail anvil 22 trends closed innail bin 21, simultaneously,stopper section 251 slides to the roof ofnail anvil 22 along thebending guide portion 222 of nail anvil, whennail anvil 22 closures are innail bin 21, thisstopper section 251 is positioned on the roof ofnail anvil 22 and oppresses in the roof of thisnail anvil 22.

Preferably, in the present embodiment, inadapter 23, be provided with theblock 26 that can move back and forth inadapter 23 axially, and when afternail anvil 22 andnail bin 21 closures,block 26 can upwards apply a support force to the near-end 223 of nail anvil in the footpath of taking over 23.Briefly, the movable distance of the near-end 223 thatblock 26 can coordinate with the near-end ofnail anvil 223 to limit nail anvil in the vertical direction of nail bin frame bottom surface.Particularly;block 26 is held in the near-end 223 of nail anvil to keep the closure state ofnail anvil 22 andnail bin 21;nail anvil 22 organized or percussion process in tension force time; can reduce the tension force that cuttingknife 25 is subject to; avoid cuttingknife 25 to rupture the in the situation that of hightension very; thereby extend the service life ofcutting knife 25, and effectively protected this straight line stitchinginstrument cutter sweep 100.

Especially, be positioned at nail bin groupware, on path, be also provided with the first positivestop lug boss 27 and the second positivestop lug boss 28 moving back and forth of block 26.Wherein, the first positivestop lug boss 27 is compared to the second positivestop lug boss 28 away fromcutting knife 25, andblock 26 is all the time between the first positivestop lug boss 27 and the second positivestop lug boss 28.

Straight line stitchinginstrument cutter sweep 100 also comprises theshell fragment 29 of the bottom surface of being fixed onpush broach bar 24, and thisshell fragment 29 can be driven and promote describedblock 26 and move back and forth on axially taking over 23 by push broach bar 24.At length, thisshell fragment 29 comprises thefirst arm 291, thesecond arm 293, is bent to form thefirst support division 292 between thefirst arm 291 and thesecond arm 293, thefirst arm 291 is compared to thesecond arm 293 away fromcutting knife 25, and thisfirst support division 292 comprises the first supportingsurface 2921 and the second supportingsurface 2922 that are selectively held in block 26.Produce active force with this second supportingsurface 2922 andblock 26 in the time that this first supportingsurface 2921 andblock 26 produce active force time, the direction of motion of thisblock 26 is contrary.Preferably,shell fragment 29 also comprises the3rd arm 295 being connected with thesecond arm 293, thesecond arm 293 is arranged between thefirst arm 291 and the3rd arm 295, thissecond arm 293 compared to the3rd arm 295 away from describedcutting knife 25, between the3rd arm 295 and thesecond arm 293,second support division 294, thesecond support divisions 294 that are formed with of bending comprise the 3rd supportingsurface 2941 that can support block 26.Wherein, in the time that the 3rd supportingsurface 2941 acts onblock 26 and when the first supportingsurface 2921 acts onblock 26, the direction of motion ofblock 26 is identical.At length, thefirst support division 292 or thesecond support division 294 can driveblock 26 to move by being held in theconvex shoulder 262 ofblock 26, and when the first supportingsurface 2921 or the 3rd supportingsurface 2941 act onblock 26,26 trend near-ends of block move; When the second supportingsurface 2922 acts onblock 26,26 of blocks trend towards distal movement.

Particularly, thisblock 26 comprise be held onpush broach bar 24 and can make clampingpart 261 that block 26 slides alongpush broach bar 24 directions of motion, be positioned at theconvex shoulder 262 of clampingpart 261 groove that forms, theguide portion 264 coordinating with nail anvil near-end 223 and the maintainingpart 263 being connected with this guide portion 264.Wherein,guide portion 264 compared to maintainingpart 263 away from the first positivestop lug boss 27, maintainingpart 263 compared to convexshoulder 262 away from the first positive stop lug boss 27.Innail anvil 22 closures, in the process ofnail bin 21,shell fragment 29 can move in the recess space of clampingpart 261, and nail anvil near-end 223bootstrap portions 264 slide to maintainingpart 263 and are finally held in respectively maintainingpart 263 and convex shoulder 262.In the present embodiment, convexshoulder 262 is connected with clampingpart 261 with maintainingpart 263, and thisblock 26 is one-body molded, and especially, theshell fragment 29 that is fixedly arranged onpush broach bar 24 bottoms is greater thanblock 26 in the distance that moves axially of taking over 23 in the distance that moves axially of taking over 23.

Especially, in enforcement embodiment of the present utility model, thisconvex shoulder 262 also comprisessecond lozenges 2622 that can coordinate with the first supportingsurface 2921 or the 3rd supportingsurface 2941 andfirst lozenges 2621 that can coordinate with the second supportingsurface 2922.

Simply introduce some work process of the present utility model below.

In the time of original state, as shown in Figure 5 and Figure 6, be that therelative nail bin 21 ofnail anvil 22 is in open configuration, initial and the 3rd supportingsurface 2941engagement limits blocks 26 are positioned at primary importance, now primary importance is that the first-phase of thisblock 26 is to resting position, the 3rd supportingsurface 2941 supports mutually with thesecond lozenges 2622 ofconvex shoulder 262,block 26 andnail anvil 22 relative separation.

In closing course, be thatnail anvil 22 is while trending towards closednail bin 21, this process is by pullingpercussion handle 1,percussion handle 1 acts onpush broach bar 24,push broach bar 24 is moved along distal direction, and promotecutting knife 25 and move along distal direction in the lump, now thestop block 26 oncutting knife 25 is held in thebending guide portion 222 of nail anvil, and slide to gradually the roof ofnail anvil 22 along thebending guide portion 222 of nail anvil, and nownail anvil 22 also becomes from the thrust that is subject tostopper section 251 oppressive force that is subject tostopper section 251 gradually.Whennail anvil 22 closures are during innail anvil 22, the power thatnail anvil 22 is subject tostop block 26 is all oppressive force, and now, the bottom surface ofstop block 26 is held in the roof of nail anvil 22.Meanwhile,push broach bar 24 drivescutting knife 25 whenpromotion nail anvil 22 moves, the near-end 223 of nail anvil also little by little lifts, and,shell fragment 29 is also accompanied bypush broach bar 24 to distal movement, and after motion certain distance, the second supportingsurface 2922 acts on thefirst lozenges 2621 ofconvex shoulder 262, now,block 26 is being driven from the primary importance of the first positivestop lug boss 27 and is moving to the second positivestop lug boss 28 by push broach bar 24.Becausenail anvil 22 andblock 26 can move underpush broach bar 24 drives simultaneously; so; the near-end 223 of nail anvil slides to maintainingpart 263 from theguide portion 264 ofblock 26; this maintainingpart 263 is positioned at sustained height with the peak ofguide portion 264; when the near-end 223 of nail anvil is placed in after maintainingpart 263; be nail anvil 22 closures innail bin 21; now; the near-end 223 thatblock 26 can be nail anvil at least provides a support force upwards; so that the counteracting force that bear thestopper section 251 ofcutting knife 25 reduces, be conducive to protectcutting knife 25.

Nailanvil 22 is completely closed, and in the time ofnail bin 21, as shown in Figure 7 and Figure 8, the second positivestop lug boss 28 and the second supportingsurface 2922engagement limits blocks 26 are positioned at the second position, and now, the near-end 223 of nail anvil is held in respectively maintainingpart 263 and convex shoulder 262.Wherein, the near-end 223 of nail anvil is provided with one and coordinates the lozenges of fitting with maintainingpart 263, and at length, when closed end, the lozenges of nail anvil near-end 223 is pressed on maintainingpart 263, and another angle of nail anvil near-end 223 is held on convex shoulder 262.In this utility model, primary importance is the position thatblock 26 is held in the first positivestop lug boss 27, and the second position is the position thatblock 26 is held in the second positive stop lug boss 28.Wherein, in this linear cutting device work process,block 26 only has in the time of primary importance and the second position in relative static conditions.

When afternail anvil 22 andnail bin 21 closures, need to the tissue being held betweennail anvil face 221 andnail bin face 211 be cut and be sewed up, the art is called percussion process, in percussion process, as shown in Figure 9 and Figure 10,push broach bar 24 needs to continue to promote toward distal direction, now thefirst support division 292 is crossed thisblock 26 due under self elastic reaction, in this process, thefirst lozenges 2621 ofconvex shoulder 262 slides to the minimum point of thefirst support division 292 along the second supportingsurface 2922, thefirst support division 292 is owing to being subject to the effect of power, its minimum point diminishes from the distance ofpush broach bar 24, and finally the minimum point of thisfirst support division 292 and the peak ofconvex shoulder 262 are positioned at sustained height, makeshell fragment 29 cross block 26.Now, thus block 26 because the resist force that is subject tonail anvil 22 is still in the second position.

After percussion completes, at the drop-downknife bar 24 that pushes back of effect ofrollback button 11, drivepush broach bar 24 to near-end motion, now, the first supportingsurface 2921 can be driven and is held in thefirst lozenges 2621 ofblock 26 andforces block 26 to move to primary importance by push broach bar 24.Then this straight line stitchinginstrument cutter sweep 100 need to be got back to original state, now, pushbroach bar 24 continues to move to near-end, thefirst support division 292 is again crossedblock 26 under self elastic reaction, particularly, thesecond lozenges 2622 ofconvex shoulder 262 slides to the minimum point of thefirst support division 292 along the first supportingsurface 2921, thereby makeshell fragment 29 cross convexshoulder 262, continue to proximal movement, the 3rd supportingsurface 2941 offinal shell fragment 29 supports thesecond lozenges 2622 ofconvex shoulder 262, makes this straight line stitchinginstrument cutter sweep 100 get back to original state.

In this utility model, be provided with axiallydisplaceable block 26 by the near-end 223 at nail anvil, and be provided with the first positivestop lug boss 27 and the second positivestop lug boss 28 and control the range of movement of thisblock 26 at near-end and far-end, onpush broach bar 24, be provided with ashell fragment 29 simultaneously, utilize the motion-promotion forceband spring plate 29 ofpush broach bar 24 to move, makeshell fragment 29 drive thisblock 26 to be held in as required the near-end 223 of nail anvil, makenail anvil 22 and the closed driving force ofnail bin 21 thereby strengthen, reduce the tension force that I shapecutting knife 25 is subject in percussion process, play a protective role for this straight cuts stitching devices, extend its service life.

Be to be understood that, although this description is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should make description as a whole, technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.

Listed a series of detailed description is above only illustrating for feasibility embodiment of the present utility model; they are not in order to limit protection domain of the present utility model, all do not depart from the equivalent embodiment that this utility model skill spirit does or change and all should be included in protection domain of the present utility model within.

Claims (10)

Translated fromChinese

1.一种直线缝合切割装置，包括：1. A linear suture cutting device, comprising:钉仓组件，所述钉仓组件包括可拆卸地设置于其远端的钉仓、以及与所述钉仓组件枢轴连接的钉砧，所述钉砧的钉砧面与所述钉仓的钉仓面相对设置并可将组织夹紧于所述钉砧面和钉仓面之间；A staple cartridge assembly, the staple cartridge assembly includes a staple cartridge detachably arranged at its distal end, and an anvil pivotally connected to the staple cartridge assembly, the anvil surface of the staple anvil is connected to the nail cartridge The staple cartridge surfaces are arranged oppositely and can clamp the tissue between the staple anvil surface and the staple cartridge surface;所述钉仓组件还包括设置于所述其近端的接管，所述接管内设置有一推刀杆及置于所述推刀杆远端的切刀，所述切刀上设有止挡部，所述止挡部可被驱动地抵持所述钉砧，使所述钉砧与所述钉仓闭合，且迫使所述钉砧相对于所述钉仓保持闭合状态；The staple cartridge assembly also includes a connecting pipe arranged at the proximal end thereof, and a push knife rod and a cutting knife placed at the far end of the pushing knife rod are arranged in the connecting pipe, and a stopper is provided on the cutting knife , the stopper can be driven against the nail anvil, close the nail anvil and the nail cartridge, and force the nail anvil to maintain a closed state relative to the nail cartridge;其特征在于，所述接管内设置有可在所述接管轴向上往复移动的挡块，且当所述钉砧与所述钉仓闭合后，所述挡块可在所述接管的径向上向所述钉砧的近端施加一支撑力。It is characterized in that a block that can reciprocate in the axial direction of the socket is provided in the connecting tube, and when the anvil and the staple cartridge are closed, the stopper can move in the radial direction of the connecting tube. A supporting force is applied to the proximal end of the anvil.2.根据权利要求1所述的直线缝合切割装置，其特征在于，所述钉仓组件内，在所述挡块的往复移动路径上还设有第一限位凸台以及第二限位凸台，所述第一限位凸台相较于所述第二限位凸台远离所述切刀，所述挡块始终位于所述第一限位凸台和所述第二限位凸台之间。2. The linear suturing and cutting device according to claim 1, characterized in that, in the staple cartridge assembly, a first limiting boss and a second limiting boss are further provided on the reciprocating movement path of the stopper. platform, the first limiting boss is farther away from the cutter than the second limiting boss, and the stopper is always located at the first limiting boss and the second limiting boss between.3.根据权利要求1所述的直线缝合切割装置，其特征在于，所述直线缝合切割装置还包括固设于所述推刀杆的底面的弹片，所述弹片可被所述推刀杆驱动地推动所述挡块在所述接管轴向上往复移动。3. The linear suture cutting device according to claim 1, characterized in that, the linear suture cutting device further comprises an elastic piece fixed on the bottom surface of the pusher rod, and the elastic piece can be driven by the pusher rod positively push the stopper to reciprocate in the axial direction of the connecting pipe.4.根据权利要求3所述的直线缝合切割装置，其特征在于，所述弹片包括第一臂、第二臂以及第三臂，所述第二臂设置于所述第一臂和所述第三臂之间，所述第一臂与所述第二臂之间弯折地形成有第一抵持部，所述第一抵持部包括可选择地抵持于所述挡块的第一抵持面以及第二抵持面；所述第三臂与所述第二臂之间弯折地形成有第二抵持部，所述第二抵持部包括可抵持所述挡块的第三抵持面。4. The linear suturing and cutting device according to claim 3, wherein the elastic piece comprises a first arm, a second arm and a third arm, and the second arm is arranged on the first arm and the second arm. Between the three arms, a first abutting portion is bent and formed between the first arm and the second arm, and the first abutting portion includes a first abutting portion that can be selectively abutted against the stopper. The abutting surface and the second abutting surface; a second abutting portion is bent and formed between the third arm and the second arm, and the second abutting portion includes a part that can abut against the stopper The third resistance surface.5.根据权利要求4所述的直线缝合切割装置，其特征在于，所述弹片在所述接管的轴向移动距离大于所述挡块在所述接管的轴向移动距离。5 . The linear suturing and cutting device according to claim 4 , wherein the axial moving distance of the elastic piece on the connecting pipe is greater than the axial moving distance of the stopper on the connecting pipe. 6 .6.根据权利要求5所述的直线缝合切割装置，其特征在于，所述挡块包括夹持于所述推刀杆的夹持部、位于所述夹持部所形成凹槽内的凸肩、与所述钉砧近端配合的引导部以及与所述引导部连接的保持部，所述凸肩在受到所述第一抵持部或所述第二抵持部作用力下，可使所述挡块在所述第一限位凸台与第二限位凸台之间往复移动。6 . The linear suture cutting device according to claim 5 , wherein the stopper includes a clamping portion clamped on the pusher rod, and a shoulder located in a groove formed by the clamping portion , a guide part matched with the proximal end of the anvil, and a holding part connected with the guide part, and the shoulder, under the force of the first abutment part or the second abutment part, can The stopper reciprocates between the first limiting boss and the second limiting boss.7.根据权利要求6所述的直线缝合切割装置，其特征在于，所述引导部相较于所述保持部远离所述第一限位凸台，在所述钉砧闭合于所述钉仓时，所述钉砧的近端自所述引导部滑向所述保持部并最终抵持于所述保持部。7. The linear suturing and cutting device according to claim 6, wherein the guiding part is farther away from the first limiting boss than the holding part, and when the anvil is closed to the staple cartridge , the proximal end of the anvil slides from the guiding part to the holding part and finally abuts against the holding part.8.根据权利要求7所述的直线缝合切割装置，其特征在于，所述第一限位凸台可与所述第三抵持面配合限制所述挡块位于第一位置，此时所述挡块与所述钉砧相对分离。8. The linear suturing and cutting device according to claim 7, wherein the first limiting boss can cooperate with the third abutting surface to limit the stopper to be located at the first position, and at this time, the The block is relatively separated from the anvil.9.根据权利要求7所述的直线缝合切割装置，其特征在于，所述第二限位凸台可与所述第二抵持面配合限制所述挡块位于第二位置，此时所述钉砧的近端抵持于所述保持部。9. The linear suturing and cutting device according to claim 7, characterized in that, the second limiting boss can cooperate with the second abutting surface to limit the stopper to be located at the second position, and at this time, the The proximal end of the anvil is against the holding part.10.根据权利要求7所述的直线缝合切割装置，其特征在于，所述第一抵持面可被所述推刀杆驱动地抵持于所述挡块并迫使所述挡块移动至第一位置。10. The linear suturing and cutting device according to claim 7, wherein the first abutting surface can be driven by the pusher rod to abut against the stopper and force the stopper to move to the second stopper. a location.

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