CN105342655B - Stapler - Google Patents

Abstract

Present invention is disclosed a kind of staplers, including ejector pin bar, cutter, ejector pin mechanism and nail bin, the ejector pin bar is for pushing the cutter and the ejector pin mechanism kinematic, the ejector pin mechanism is for pushing suturing nail, the nail bin includes the staple containing slot for accommodating the suturing nail and the cutter groove in the middle part of the staple containing slot, the cutter groove inner surface is formed with several prominent structures, when the cutter described in the ejector pin mechanism urges pass through the cutter groove, the distal movement of cutter contact and the relatively described prominent structure towards the stapler.Several prominent structures are arranged by the inner surface in cutter groove in the present invention, so that cutter pass through the cutter groove when with the prominent structural interaction, prominent structure and the contact area of cutter are smaller, and friction is small between the two, it is ensured that cutter in cutter groove in smoothly advancing.

Description

Stapler

Technical field

The present invention relates to medical instruments field more particularly to a kind of staplers.

Background technology

Stapler is a kind of common surgical operating instrument, it can be completed at the same time suture and cutting action, significantly The surgical time is saved, amount of bleeding is reduced, improves success rate of operation.The cutter of existing stapler pass through in nail bin Cutter groove and when reaching tissue, cutter groove is contact of the face with face, the frictional force between cutter groove and cutter with the side of cutter Larger, cutter groove hinders cutter towards histokinesis.

Invention content

The purpose of the present invention is to provide a kind of staplers.

One of for achieving the above object, a kind of stapler of an embodiment of the present invention offer, including ejector pin bar, Cutter, ejector pin mechanism and nail bin, the ejector pin bar is for pushing the cutter and the ejector pin mechanism kinematic, the ejector pin For pushing suturing nail, the nail bin includes staple containing slot for accommodating the suturing nail and is located at the suture for mechanism The cutter groove in the middle part of holding tank is followed closely, if the cutter groove inner surface is formed with several prominent structures and connects several prominent structures Dry sunk structure, when the cutter described in the ejector pin mechanism urges pass through the cutter groove, the cutter contact and opposite institute State distal movement of the prominent structure towards the stapler.

As being further improved for an embodiment of the present invention, the prominent structure and the sunk structure combine the side of being formed Waveform configuration.

As being further improved for an embodiment of the present invention, the cutter groove further includes cutter groove ontology, the prominent structure Surface be located at corresponding cutter groove ontology institute planar, the surface of the sunk structure is less than where the cutter groove ontology Plane.

As being further improved for an embodiment of the present invention, the cutter described in the ejector pin mechanism urges pass through described When cutter groove, the relatively described prominent structure of the cutter and the cutter groove ontology generate the first frictional force and the second friction respectively Power, first frictional force are less than second frictional force.

As being further improved for an embodiment of the present invention, the cutter groove ontology is located at the both ends of the cutter groove, described Prominent structure and the sunk structure are located between the cutter groove ontology at the cutter groove both ends.

As being further improved for an embodiment of the present invention, the nail bin includes the nail bin face for being located at its distal end, described Prominent structure extends to the nail bin face.

As being further improved for an embodiment of the present invention, the extending direction of the prominent structure is parallel to the cutting Direction of the stitching unstrument proximal end towards distal end.

As being further improved for an embodiment of the present invention, the cutter groove includes being located at the cutter both sides The first side wall and second sidewall, the first side wall and the second sidewall have been respectively formed on the prominent structure.

It is described prominent on the first side wall and the second sidewall as being further improved for an embodiment of the present invention Go out structure to be oppositely arranged.

As being further improved for an embodiment of the present invention, the proximal end of the cutter is formed with an at least protruding portion, The ejector pin mechanism includes ejector pin pedestal, and an at least straight slot for the corresponding protruding portion is formed on the ejector pin pedestal, described Straight slot inner surface is formed with several fins, and when the stapler is in cut state, the cutter are relatively described to be pushed away Nailing machine structure is towards the distal movement of the stapler, and the protruding portion of the cutter contacts and the relatively described fin fortune It is dynamic.

Compared with prior art, the beneficial effects of the present invention are：The present invention is several by being arranged in the inner surface of cutter groove Prominent structure so that connect with the prominent structural interaction, prominent structure and cutter when cutter pass through the cutter groove Contacting surface product is smaller, and friction is small between the two, it is ensured that cutter in cutter groove in smoothly advancing.

Description of the drawings

Fig. 1 is the stapler three-dimensional structure diagram of an embodiment of the present invention；

Fig. 2 is the stapler explosive view of an embodiment of the present invention；

Fig. 3 is the stapler part-structure explosive view of an embodiment of the present invention；

Fig. 4 is the stapler part-structure explosive view of an embodiment of the present invention；

Fig. 5 a- Fig. 5 c are that the cutter of an embodiment of the present invention are assembled into the schematic diagram of knife rest；

Fig. 6 a are the stapler suture state first angle fragmentary cross-sectional views of an embodiment of the present invention；

Fig. 6 b are the stapler suture state second angle fragmentary cross-sectional views of an embodiment of the present invention；

Fig. 7 a are the stapler cut state first angle fragmentary cross-sectional views of an embodiment of the present invention；

Fig. 7 b are the stapler cut state second angle fragmentary cross-sectional views of an embodiment of the present invention；

Fig. 8 is the nail bin stereogram of an embodiment of the present invention；

Fig. 9 is A-A sectional views in Fig. 8；

Figure 10 is the nail bin front view of an embodiment of the present invention；

Figure 11 a are the first position sectional views of the stapler original state of an embodiment of the present invention；

Figure 11 b are the second position sectional views of the stapler original state of an embodiment of the present invention；

Figure 12 a are the first position sectional views of the stapler closed state of an embodiment of the present invention；

Figure 12 b are the second position sectional views of the stapler closed state of an embodiment of the present invention；

Figure 13 a are the first position sectional views of the stapler suture cut state of an embodiment of the present invention；

Figure 13 b are the second position sectional views of the stapler suture cut state of an embodiment of the present invention.

Specific implementation mode

Below with reference to specific implementation mode shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally Transformation is included within the scope of protection of the present invention.

Clearly to express described position and direction in the application, using equipment operator as reference, near operation is leaned on One end of person is proximal end, and one end far from operator is distal end.Meanwhile in this application, the lower section for defining stapler is The direction that gripping handle is extended by shell, it is opposite with the lower section, that is, it is defined as the top of stapler.

As shown in Figure 1, in an embodiment of the present invention, stapler 100 includes shell 10, interior to remote from shell 10 The support construction 20 stretched out is held, the nail anvil seat 30 of 20 distal end of support construction is connected to.Nail anvil seat 30 can be fixed with support construction 20 The proximal end lower section of connection, shell 10 forms gripping handle 40.Stapler 100 further includes nail bin groupware 50 and nail-anvil assembly 60.In the present embodiment, nail bin groupware 50 and nail-anvil assembly 60 are removably mounted on nail anvil seat 30, and with nail anvil seat 30 Shape match, in this way, can in smaller operable space to physiological tissue carry out cutting suture operation.

Coordinate Fig. 2-Fig. 4, nail bin groupware 50 that there is nail bin 51, which includes a nail bin face 511, on nail bin face 511 It is arranged with the staple containing slot 512 of a line or multirow in an interleaved manner, nail bin groupware 50 further includes being set in nail bin 51 Ejector pin mechanism 52 and cutter component.Ejector pin mechanism 52 can release suturing nail from staple containing slot 512, and cutter component includes One knife rest 53 and one is mounted on the cutter 54 of 53 distal end of knife rest.

Ejector pin mechanism 52 includes for pushing in the staple containing slot 512 pushing slice of nail 522 of suturing nail and for holding The ejector pin pedestal 521 of the pushing slice of nail 522 is carried, the middle part of the pushing slice of nail 522 is equipped with the slit being adapted to the cutter 54 523, to support the percussion of cutter 54 to operate.Here, pushing slice of nail 522 is correspondingly arranged with staple containing slot 512, and pushing slice of nail 522 quantity is consistent with the quantity of staple containing slot 512.

In an embodiment of the present invention, the distal end of nail bin groupware 50 is also associated with nail-anvil assembly 60, and nail-anvil assembly 60 wraps Nail anvil 61 and knife anvil 62 are included, while nail bin groupware 50 is installed to nail anvil seat 30, the nail anvil 61 and knife anvil 62 can be ordinatedly On nail anvil seat 30.

Stapler 100 further includes percussion component, and percussion component includes the percussion handle for being set to 100 lower section of stapler The driving member of hand 71, the nail bin push rod 72 and connection percussion handle 71 and nail bin push rod 72 that are driven by percussion handle 71.Nail Storehouse push rod 72 can drive nail bin groupware 50 to be moved from the proximate of stapler 100 under the action of percussion handle 71, Close to nail-anvil assembly 60, be finally closed nail bin groupware 50 and nail-anvil assembly 60.If at this point, in nail bin groupware 50 and nail anvil group Physiological tissue is placed between part 60, then the nail bin push rod 72 can drive nail bin groupware 50 to close the life close to nail-anvil assembly 60 to press from both sides Manage tissue.

In an embodiment of the present invention, percussion component further includes ejector pin bar 73, is slidably fit into nail bin and pushed away In bar 72, ejector pin bar 73 is for pushing knife rest 53, and in some embodiments, the surface that ejector pin bar 73 is acted on knife rest 53 is produced For the shape to fit each other, so that the two does not depart from mutually.

Operating process of the stapler 100 when physiological tissue is cut in suture in an embodiment of the present invention is as follows：

After completing the operation of Jia Bi physiological tissues, percussion handle 71 is in handle return spring（It is not shown）Drive under towards separate The direction of gripping handle 40, which rotates, realizes automatically reseting for percussion handle 71.

In the process, ejector pin bar 73 is distally transported under the percussion effect of percussion component towards the stapler 100 Dynamic, ejector pin bar 73 pushes knife rest 53, cutter 54 and ejector pin mechanism 52 to be moved towards 60 direction of nail-anvil assembly, and ejector pin mechanism 52 pushes away Suturing nail in dynamic staple containing slot 512 clenches on physiological tissue, and then ejector pin bar 73 continues to press on knife rest 53, cutting Knife 54 cuts corresponding physiological tissue.

It, can be by pressing button release 80, to open the nail bin being closed after stapler 100 reaches percussion completion status Component 50 and nail-anvil assembly 60.

Certainly, the stapler is if desired reused, new nail bin groupware 50 and/or nail-anvil assembly can be replaced 60, to carry out the cutting suture of next time.

In the present embodiment, the force of the stress surface 5211 and 53 distal end of the knife rest of 521 proximal end of ejector pin pedestal The shrapnel 55 of an at least undulate is provided between face 531, the cutter 54 pass through the slit 523 and the shrapnel 55 And it is fixed on the knife rest 53；Wherein, when the stapler 100 is in suture state, the ejector pin bar 73 pushes The knife rest 53 is distally mobile until the ejector pin mechanism 52 releases the suturing nail to complete towards the stapler 100 Suture, the shrapnel 55 do not deform upon, and the blade face 541 of the cutter 54 is less than the tooth of 52 distal end of ejector pin mechanism Face 5221；When the stapler 100 is in cut state, the ejector pin bar 73 continues to press on the knife rest 53, described Ejector pin mechanism 52 does not move, and the knife rest 53 drives the shrapnel 55 to deform upon, and the knife rest 53 drives the cutter 54 protrude out the flank of tooth 523 and complete cutting.

Here, when the stapler 100 is in suture state, knife rest 53, shrapnel 55, cutter 54 and ejector pin knot 52 groups of structure is integral, under the impetus of ejector pin bar 73, knife rest 53, shrapnel 55, cutter 54 and nail pushing structure 52 court together It is distally moved to stapler 100, during this, knife rest 53, shrapnel 55, cutter 54 and nail pushing structure 52 are relatively quiet Only, only as the connection structure between knife rest 53 and ejector pin mechanism 52 without deformation, ejector pin mechanism 52 will suture shrapnel 55 It follows closely the suturing nail in holding tank 512 to release and suture molding in tissue, while the blade face 541 of cutter 54 is pushed away less than described The flank of tooth 523 of nailing machine structure 52 and without the cutting operation to tissue, final ejector pin mechanism 52 by nail-anvil assembly 60 blocking And it can not continue towards 100 distal movement of stapler；When the stapler 100 is in cut state, due to pushing away Nailing machine structure 52 can not move, and during this, shrapnel 55 is sent out by the active force of ejector pin mechanism 52 and knife rest 53 simultaneously Raw compressional deformation so that knife rest 53 can continue to move close to nail pushing structure 52, and knife rest 53 drives cutter 54 are relatively described to push away Pin structure 52 continues the distal movement towards stapler 100, until the blade face 541 of cutter 54 protrudes out the flank of tooth 5221 and tissue that opposite joint is got togather carries out cutting operation.

Compared to the prior art, the stapler 100 of present embodiment can be realized first to suture to tissue cuts behaviour again Make, suturing nail is organizationally molded when cutting operation, and the tractive force that cutter 54 generate when cutting does not interfere with The molding of suturing nail, and tissue has been sewn nail and has fixed, it is not easy to it is drawn and damaged by cutter 54, cutter 54 are suturing Being auxiliarily fixed under effect for nail, can fitly cut off tissue, and therefore, present embodiment is preferable to the sewing effect of tissue, and The notch of tissue is neatly without tearing.

In the present embodiment, when the stapler 100 is in original state, the force surface 531 and/or institute Stress surface 5211 is stated not contact with the shrapnel 55, certainly, in other modes, the force surface 531 and/or the stress surface 5211 can also contact with the shrapnel 55 in the initial state；It is described to apply when the stapler 100 is in suture state Power face 531 and the stress surface 5211 contact the shrapnel 55, but the shrapnel 55 does not deform upon；When the stapler 100 when being in cut state, and the force surface 531 and the stress surface 5211 squeeze the deformation of the shrapnel 55.

In the present embodiment, the shrapnel 55 can be the corrugated compression spring of strip, and the shrapnel 55 has pretightning force F, The pretightning force F is the minimum force that the shrapnel 55 deforms upon, when the stapler 100 is in suture state, institute State ejector pin bar 73 be applied to the knife rest 53 the first thrust F1 be less than the pretightning force F, avoid the shrapnel 55 under suture state It deforms upon；When the stapler 100 is in cut state, the ejector pin bar 73 is applied to the second of the knife rest 53 Thrust F2 is greater than or equal to the pretightning force F, so that shrapnel 55 can be deformed upon smoothly.In addition, the suturing nail has Forming force F ' when molding, the first thrust F1 need to be greater than or equal to the forming force F ', i.e. pretightning force F is more than forming force F ', so, it is ensured that in the case where shrapnel 55 does not deform upon, suturing nail can under the action of the first thrust F1 smoothly at Type is to suture tissue.

In the present embodiment, the waveform of the shrapnel 55 includes wave crest and/or trough, the wave crest and/or described Trough is arranged in face of the stress surface 5221 and the force surface 531, and here, wave crest is defined as on shrapnel 55 towards cutting suture 100 distal end region outstanding of device, trough are defined as the region being recessed towards 100 proximal end of stapler.

Specifically, the stapler 100 includes two shrapnels 55 for stacking setting, two shrapnels 55 wrap It includes a primary peak 551a and two the first troughs to include the first shrapnel 55a and the second shrapnel 55b, the first shrapnel 55a 552a, the second shrapnel 55b include two secondary peak 551b and a second trough 552b, primary peak 551a and second Trough 552b contacts with each other, and two the first trough 552a and two secondary peak 551b are correspondingly arranged, and two the first troughs 552a is towards the force surface 531, and two secondary peak 551b are towards the stress surface 5221.Here, the first shrapnel 55a and Two shrapnel 55b alignment stack, and under the suture state of stapler 100, and the first shrapnel 55a and the second shrapnel 55b's is vertical Section is in " 8 " font, and the accommodation space needed for shrapnel 55 is smaller；In addition, in the sewing process of stapler 100, only Two end regions of shrapnel 55 are gradually in contact with force surface 531 and stress surface 5221, the intermediate region of shrapnel 55 not with force surface 531 and stress surface 5221 be in contact, on the one hand, can ensure shrapnel 55 convenient for occur elastic deformation, on the other hand, it is ensured that shrapnel 55 pairs of nail pushing structures 52 uniformly exert a force, so that nail pushing structure 52 can be moved towards the distal end of stapler as the crow flies. Certainly, in other embodiments, the quantity of shrapnel 55 can not be two, and the shape of shrapnel 55 can not be as described above, example Such as, the longitudinal section of the first shrapnel and the combination of the second shrapnel is in " 0 " font.

Here, it should be noted that under the suture state of the stapler 100, the first end of the first shrapnel 55a 553a and second end 554a is located at the inside of 53 first end 532 of corresponding knife rest and the second end 533, that is, sutures state The length of lower first shrapnel 55a is less than the length of knife rest 53 so that the both ends of the first shrapnel 55a have certain deformation space. When the first shrapnel 55a, which is squeezed, generates deformation, the first end 553a and second end 554a of the first shrapnel 55a are respectively facing knife 53 first end 532 of frame and the second end 533 extend, preferably, when the first shrapnel 55a reaches maximum compressibility, the first bullet The first end 553a and second end 554a of piece 55a is no more than the first end 532 and the second end 533 of corresponding knife rest 53, keeps away Exempting from the first shrapnel 55a, other component is hindered around in recovery process, or avoids the first shrapnel 55a in deformation process In the other component of surrounding is had an impact.The structure and deformation process of second shrapnel 55b is similar to the first shrapnel 55a, herein not It repeats again.

In the present embodiment, there are two mutually separated protruding portion 542, the ejector pins for the proximal end tool of the cutter 54 It is formed on pedestal 521 there are two straight slot 5212, first is formed at two the first trough 552a and runs through slot 555a, two the second waves It is formed with second at peak 551b and runs through slot 555b, the protruding portion 542 sequentially passes through straight slot 5212, second through slot 555b and the Consistent wears groove 555a and be fixed on the knife rest 53.In an embodiment of the present invention, as shown in Figures 3 and 4, protruding portion 542 proximal end is formed with coupler construction 5421, formed on knife rest 53 the fixed protruding portion 542 groove body 534 and with the hook The structure that structure 5421 matches, in this way, protruding portion 542 may pass through the groove body 534 and by coupler construction 5421 and knife rest 53 are fixed to each other.

Here, it should be noted that on the thickness direction of the protruding portion 542, the straight slot 5212, described first are passed through Wears groove 555a and described second is more than the width of the groove body 534 through the width of slot 555b, in this way, the protruding portion of cutter 54 542 can pass through the straight slot 5212, described first through slot 555a and described second through slot 555b, and shrapnel 55 is sent out When raw deformation, can facilitate the protruding portions 542 relatively described first of cutter 54 through slot 555a, described second through slot 555b and The straight slot 5212 moves.In addition, as shown in Fig. 5 a- Fig. 5 c, the schematic diagram of knife rest 53, cutter are assembled into for cutter 54 Coupler construction 5421 and the supporting structure 5422 positioned at 5421 side of the coupler construction are extended at 54 protruding portion 542, this In, supporting structure 5422 is in triangular shape；Coupler construction 5421 includes hook ontology 5421a and protrudes out card release along second direction Y The hook part 5421b for hooking ontology 5421a, is formed with gap 54211b between hook part 5421b and protruding portion 542；The groove body 534 include towards the first opening 5341 of the shrapnel 55, the second opening 5342 far from the shrapnel 55 and positioned at described Stage portion 5343 between first opening 5341 and second opening 5342.

Specifically, as shown in Figure 5 a, coupler construction 5421 enters groove body 534, and the hook knot by the first opening 5341 X is moved structure 5421 along a first direction, until supporting structure 5422 supports the force surface 531 of knife rest 53；At this point, such as Fig. 5 b institutes Show, since the hardness of supporting structure 5422 is more than the hardness of 53 force surface 531 of knife rest, such as supporting structure 5422 is rigid material Material, force surface 531 is plastics, described to support knot when X is moved to extreme position to the coupler construction 5421 along a first direction Structure 5422 promotes the plastics 531 to deform upon, and supporting structure 5422 itself does not change, meanwhile, the hook part 5421b is reached at the stage portion 5343；Together referring to Fig. 5 c, the coupler construction 5421 is continued to move to along second direction Y, The gap 54211b gradually coats stage portion 5343 and part force surface 531, and the supporting structure 5422 is along second direction Y Force surface 531 is squeezed until the supporting structure 5422 enters groove body 534, when the coupler construction 5421 is along second direction Y When being moved to extreme position, the gap 54211b closely coats stage portion 5343 and part force surface 531, the hook part 5421b contacts the madial wall of groove body 534 along the distalmost end end face of second direction Y, while the supporting structure 5422 abuts institute The madial wall of groove body 534 is stated, in this way, hook part 5421b, gap 54211b and supporting structure 5422 and the cooperation of groove body 534 limit Movement of the cutter 54 with respect to knife rest 53 X and its reversed, second direction Y and its direction along a first direction is made so that cutting Knife 54 is stablized with knife rest 53 to be coordinated, and the stability of 54 traveling process of cutter is improved.It should be noted that first direction X is to cut The direction for being distally-oriented to proximal end of slot clutch, second direction Y is perpendicular to first direction X, and on second direction Y, first is open 5341 length is equal or slightly larger than the maximum length of protruding portion 542 so that protruding portion 542 can be smoothly by the first opening 5341 Into groove body 534, hook part 5421b is anti-along second direction Y along the end face of second direction Y distalmost end and supporting structure 5422 Spacing between the end face of direction distalmost end is substantially equal to length of second opening 5342 along second direction Y so that final card Hook part 5421b and supporting structure 5422 can support two opposite madial walls of groove body 534 respectively, in addition, stage portion 5343 can have Have an inclined surface 53431, hook part 5421b is also inclined-plane 54212b close to the one side of gap 54211b, inclined surface 53431 with tiltedly Face 54212b cooperates, and hook part 5421b opposing steps portion 5343 is facilitated to slide.

In the following, simply introducing the change schematic diagram of an embodiment of the present invention shrapnel 55, as shown in Fig. 6 a and Fig. 6 b, work as institute When stating stapler 100 and being in suture state, the force surface 531 of the knife rest 53 and the stress surface 5211 of ejector pin mechanism 52 by The first trough 552a and the secondary peak 551b are gradually contacted respectively, at this point, shrapnel 55 does not deform upon, the first wave Maximum distance between paddy 552a and the secondary peak 551b is the first space D 1；As shown in Fig. 7 a and Fig. 7 b, cut when described When slot clutch 100 is in cut state, shrapnel 55 is by the force surface 531 of the knife rest 53 and the stress surface of ejector pin mechanism 52 5211 extruding and generate elastic deformation, the first trough 552a and secondary peak 551b is moved closer to, described first Maximum distance between trough 552a and the secondary peak 551b shorten to the second space D 2, here, with 55 complete shape of shrapnel For change, i.e., the second space D 2 is zero, and but not limited to this, and in other embodiments, the second space D 2 can be not zero.At this In embodiment, the variable quantity between first space D 1 and second space D 2 is the decrement of shrapnel 55, that is, For the distance that cutter 54 are moved relative to the ejector pin mechanism 52, the first space D 1 and the second spacing are set in this way, can pass through D2 controls the displacement distance of the ejector pin mechanism 52 relatively of cutter 54；For example, the second space D 2 is set as zero, at this time only First space D 1 is equal to the displacement distance of the ejector pin mechanism 52 relatively of cutter 54.

As shown in Fig. 8 to Figure 10, the nail bin 51 further includes the cutter groove 513 for being located at 512 middle part of the staple containing slot, 513 inner surface of the cutter groove is formed with several prominent structures 515, and the cutter 54 described in the ejector pin mechanism urges pass through described When cutter groove 513, the cutter 54 contact and the relatively described prominent structure 515 is transported towards the distal end of the stapler 100 It is dynamic.

Here, cutter 54 are only contacted with the protrusion structure 515 in cutter groove 513, compared to cutter 54 and entire cutter groove The case where 513 inner surfaces contact, present embodiment cutter 54 and the contact area of prominent structure 515 are smaller, cutter 54 and Friction is small between prominent structure 515, effectively reduces cutter groove 513 to cutter 54 towards 100 distal end of stapler The obstruction of movement so that cutter 54 can be in smoothly advancing in cutter groove 513.In addition, in order to ensure 54 liang of side-friction forces of cutter Consistency, the opposite the first side wall 513a and second sidewall 513b of the cutter groove 513 has been respectively formed on the prominent structure 515, and the prominent structure 515 on the first side wall 513a and second sidewall 513b is oppositely arranged.

In the present embodiment, several recess for connecting several prominent structures 515 are also formed in the cutter groove 513 Structure 514, the prominent structure 515 and the combination of the sunk structure 514 form square wave-shaped configuration, here, square wave-shaped configuration Design can ensure cutter 54 towards stapler while reducing cutter 54 with 513 inner surface frictional force of cutter groove The stability of 100 distal movement processes.Certainly, in other embodiments, the prominent structure 515 and the sunk structure 514 also may be combined to form the forms such as sine wave.

In the present embodiment, the cutter groove 513 further includes cutter groove ontology（Including the first cutter groove ontology 5131a and second Cutter groove ontology 5131b）, here by taking the first cutter groove ontology 5131a at 513 the first side wall 513a of cutter groove as an example, the first knife Slot ontology 5131a is two end regions of the first side wall 513, and the prominent structure 515 and the sunk structure 514 are positioned at described The intermediate region of the cutter groove ontology 5131a at 513 both ends of cutter groove, the width of prominent structure 515 is less than cutter groove ontology 5131a's Width.In addition, the surface of the prominent structure 515 is located at cutter groove ontology 5131a institutes planar, the sunk structure 514 surface is less than plane where the cutter groove ontology 5131a, and in other words, present embodiment is substantially in the first side wall 513a it is upper it is recessed form several sunk structures 514, the intermediate region of adjacent sunk structure 514 just forms in contrast prominent Go out structure 515, therefore, 513 region of the first side wall that the prominent structure 515 is not recessed substantially.Second cutter groove ontology 5131b Description similar to above-mentioned first cutter groove ontology 5131a, details are not described herein.

Here, suppose that between the spacing between opposite the first cutter groove ontology 5131a and the second cutter groove ontology 5131b is first The spacing between protrusion structure 515 on gap d1, opposite the first side wall 513a and second sidewall 513b is the second gap d 2, phase To the first side wall 513a and second sidewall 513b on sunk structure 514 between spacing be third space d3, then between third Gap d3>Second gap d, 2=the first gap d 1.Therefore, when cutter 54 pass through cutter groove 513, it is with the first cutter groove ontology 5131a Example, cutter 54 can contact prominent structure 515 and the first cutter groove ontology 5131a simultaneously, since the width of prominent structure 515 is less than The width of first cutter groove ontology 5131a, prominent structure 515 and the contact area of cutter 54 are less than the first cutter groove ontology 5131a With the contact area of cutter 54, as the relatively described prominent structure 515 of the cutter 54 and the first cutter groove ontology 5131a When generating the first frictional force f1 and the second frictional force f2 respectively, the first frictional force f1 is certainly less than second frictional force F2, to which the prominent structure 515 can reduce the frictional force between cutter 54 and cutter groove 513.Certainly, in other embodiment In, cutter 54 can design it is relatively narrow, in this way, only corresponding prominent 515 region of structure of cutter 54 by the cutter groove 513 without Across the first regions cutter groove ontology 5131a, in this way, rubbing between cutter 54 and cutter groove 513 on the one hand can be further decreased Power is wiped, on the other hand can influence cutter groove 513 intensity of itself to avoid excessive protrusion structure 515 is arranged.

In the present embodiment, the extending direction of the prominent structure 515 is parallel to 100 proximal end court of the stapler To the direction of distal end, and prominent structure 515 extends at the nail bin face 511, i.e., can see institute at the nail bin face 511 State prominent structure 515, it is ensured that the reduction effect of the prominent frictional force between cutter 54 and cutter groove 513 of structure 515 can be protected It holds to the blade face 541 of cutter 54 and protrudes out nail bin face 511, cutter 54 can complete the dissection to tissue at this time.

It is described to push away in order to further decrease cutter 54 towards the frictional force during 100 distal movement of stapler 5212 inner surface of straight slot of nail pedestal 521 is formed with several fins（It does not indicate）, when the stapler 100 is in cutting shape When state, the relatively described ejector pin mechanism 52 of the cutter 54 towards the stapler 100 distal movement, it is described at this time to cut The protruding portion 542 of cutter 54 contact and the relatively described fin and towards the distal movement of the stapler 100, fin Design can effectively reduce the frictional force between 5212 inner surface of cutter 54 and straight slot.

Suture and the cutting process of stapler 100 is explained in detail below, in conjunction with the explanation of above-mentioned stapler 100, tool Body includes：

When the stapler 100 is in original state, together with reference to figure 11a and Figure 11 b, nail bin groupware 50 and nail There is a distance, the force surface 531 and/or the stress surface 5211 are not contacted with the shrapnel 55 between anvil assembly 60； Then nail bin push rod 72 pushes nail bin groupware 50 to be moved towards nail-anvil assembly 60, until nail bin groupware 60 is clamped with nail-anvil assembly 60 Tissue, as shown in Figure 12 a and Figure 12 b；

When the stapler 100 is in suture state, ejector pin bar 73 exerts a force under the percussion effect of percussion component In on knife rest 53, since the first thrust F1 that ejector pin bar 73 at this time is applied to the knife rest 53 is less than the pretightning force of the shrapnel 55 F, shrapnel 55 do not deform upon, and the first thrust F1 is transferred at ejector pin mechanism 52 by shrapnel 55, in this way, in the work of ejector pin bar 73 Under, knife rest 53, shrapnel 55, ejector pin mechanism 52, cutter 54 are opposing stationary and are moved together towards nail-anvil assembly 60, until pushing away Nailing machine structure 52 releases the suturing nail in staple containing slot 512, and the power that ejector pin mechanism 52 is applied to the suturing nail is first Thrust F1, since the first thrust F1 is more than the forming force F ' of suturing nail, ejector pin mechanism 52 can assist suturing nail to be molded at tissue, Meanwhile after suturing nail molding, ejector pin mechanism 52 rests on original place, the nothing by the barrier effect of nail-anvil assembly 60 of ejector pin mechanism 52 Method continues to move towards the distal end of stapler 100, in addition, the blade face 541 of cutter 54 is less than the tooth of ejector pin mechanism 52 Face 523, specifically, the blade face 541 of cutter 54 is less than the nail bin face 511 at this time.Certainly, inevitably, first push away Power F1 can be lost in transmittance process, by the slightly larger of the first thrust F1 settings, it is ensured that ejector pin mechanism 52 is smoothly auxiliary Suturing nail is helped to be molded.

When the stapler 100 is in cut state, together with reference to figure 13a and Figure 13 b, ejector pin bar 73 continues to apply Power is on knife rest 53, since the second thrust F2 that ejector pin bar 73 at this time is applied to the knife rest 53 is more than the preload of the shrapnel 55 Power F, and the one end of shrapnel 55 far from knife rest 53 is stopped that shrapnel 55 is deformed upon at this time by ejector pin mechanism 52, knife rest 53 drives institute The relatively described ejector pin mechanism 52 of cutter 54 is stated to continue to move towards nail-anvil assembly 60, until tissue is completed in the cutting of cutter 54, At this point, the blade face 541 of cutter 54 contacts the knife anvil 62 on nail-anvil assembly 60, specifically, the contact of cutter 54 and opposite institute The protrusion structure 515 stated in cutter groove 513 moves towards 62 direction of knife anvil and cuts off tissue.

After the stapler 100 completes suture cutting operation, ejector pin bar 73 is towards the proximal end of stapler 100 Movement, shrapnel 55 restore to the original state, and the blade face 541 of cutter 54 is also reset to the flank of tooth 523 less than ejector pin mechanism 52.

The present invention passes through control by the way that the shrapnel 55 with certain pretightning force is arranged between ejector pin mechanism 52 and knife rest 53 The thrust of ejector pin bar 73 realizes that stapler 100 first sutures the operation cut again to tissue, simple in structure, the suture to tissue Effect is preferable, and the notch organized is neatly without tearing.In addition, several prominent structures 515 are formed in the cutter groove 513 of the present invention, The frictional force that cutter 54 are subject to when advancing in cutter groove 513 can be reduced.

It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book With the other embodiment of understanding.

The series of detailed descriptions listed above only for the present invention feasible embodiment specifically Bright, they are all without departing from equivalent implementations made by technical spirit of the present invention not to limit the scope of the invention Or change should all be included in the protection scope of the present invention.

Claims (7)

1. a kind of stapler, including ejector pin bar, cutter, ejector pin mechanism and nail bin, the ejector pin bar is described for pushing Cutter and the ejector pin mechanism kinematic, the ejector pin mechanism is for pushing suturing nail, which is characterized in that the nail bin includes using In the staple containing slot and the cutter groove in the middle part of the staple containing slot that accommodate the suturing nail, the cutter groove inner surface It is formed with several sunk structures of several prominent structures and several prominent structures of connection；

The cutter groove further includes cutter groove ontology, and the surface of the prominent structure is located at plane where the corresponding cutter groove ontology Interior, the surface of the sunk structure is less than plane where the cutter groove ontology；

The cutter groove ontology is located at the both ends of the cutter groove, and the prominent structure and the sunk structure are located at the cutter groove both ends The cutter groove ontology between；

The width of prominent structure is less than the width of cutter groove ontology；

When the cutter described in the ejector pin mechanism urges pass through the cutter groove, the cutter contact simultaneously relatively described prominent is tied Distal movement of the structure towards the stapler；The relatively described prominent structure of the cutter and the cutter groove ontology produce respectively Raw first frictional force and the second frictional force, first frictional force are less than second frictional force.

2. stapler according to claim 1, which is characterized in that the prominent structure and sunk structure combination Form square wave-shaped configuration.

3. stapler according to claim 1, which is characterized in that the nail bin includes the nail bin positioned at its distal end Face, the prominent structure extend to the nail bin face.

4. stapler according to claim 1, which is characterized in that the extending direction of the prominent structure is parallel to institute State direction of the stapler proximal end towards distal end.

5. stapler according to claim 1, which is characterized in that the cutter groove includes being located at the cutter The first side wall and second sidewall of both sides, the first side wall and the second sidewall have been respectively formed on the prominent structure.

6. stapler according to claim 5, which is characterized in that on the first side wall and the second sidewall The prominent structure is oppositely arranged.

7. stapler according to claim 1, which is characterized in that it is prominent that the proximal end of the cutter is formed at least one Going out portion, the ejector pin mechanism includes ejector pin pedestal, and an at least straight slot for the corresponding protruding portion is formed on the ejector pin pedestal, The straight slot inner surface is formed with several fins, and when the stapler is in cut state, the cutter are with respect to institute Distal movement of the ejector pin mechanism towards the stapler is stated, the protruding portion contact of the cutter is simultaneously relatively described convex Rib moves.