The content of the invention
The present invention is intended to provide a kind of improved surgical instruments, it can increase the intensity of supporting part, avoid supporting part from existingFracture occurs in surgical procedure and occurs unexpected.The concrete technical scheme of the present invention is as follows：
A kind of surgical instruments of the present invention, including：Staple cartridge tray, it is used to be operably supported the nail bin being located therein；SupportNail seat, it is pivotably connected to the staple cartridge tray, and optionally moves between the open and the closed positions, described to supportNail seat has the resist-nailed seat groove being located therein；Cutter, its relatively described staple cartridge tray is operably supported, including supporting part,When the resist-nailed seat is in the close position, the supporting part enters the resist-nailed seat groove, and may be in response to be applied to described cutPercussion force or withdrawal force on cutter move in the resist-nailed seat groove；The supporting part include from the main bodys of the cutter toThe lug of opposite sides extension, the lug include free end and are connected to the root of the cutter main body, the lugThickness is successively decreased from root to free end.
Because being using above-mentioned technical proposal, beneficial effects of the present invention：Because of the setting of ledge arrangement so that in resist-nailed seat grooveIn the case that space is limited, effectively increases the intensity of lug, make it avoid being broken because bearing huge pulling force.
As a further refinement of the present invention, the supporting part includes the top surface of two lug free ends of connection,The top surface is parabola.The top surface of supporting part is the one side away from chucking power suffered by lug, and top surface is parabola so that supportingThe bending stress that portion is subject to along each section of Impact direction is identical, ensures the uniform intensity distribution of supporting part.
As a further refinement of the present invention, the supporting part includes the top surface of two lug free ends of connection,The top surface is arc surface.The top surface of supporting part is the one side away from pulling force suffered by lug, and top surface is arc surface so that supporting partThe bending stress being subject to along each section of Impact direction is identical, ensures the uniform intensity distribution of supporting part, and is easierMachine-shaping.
As a further refinement of the present invention, the lug has the bottom surface of the relatively close staple cartridge tray and away from describedThe back side of staple cartridge tray, the back side are inclined-plane.Ramp structure is simple, easily processed into type.
As a further refinement of the present invention, the lug has the bottom surface of the relatively close staple cartridge tray and away from describedThe back side of staple cartridge tray, the bottom surface are equipped with fillet close to the position of the root.The design of fillet is also to solve stress concentrationProblem, further increases the intensity of lug root.
As a further refinement of the present invention, the resist-nailed seat groove is matched somebody with somebody with the supporting part phase shape.Supporting part is contained inIn resist-nailed seat groove, both shapes with can avoid rocking, prevented also from dust and other impurities enter resist-nailed seat groove and influence supporting part toThe smooth degree moved in nail seat groove.
As a further refinement of the present invention, the material of the supporting part is stainless steel.On the basis of improved structure,It is preferred that stainless steel material, can be such that the intensity of supporting part is further lifted.
As a further refinement of the present invention, the staple cartridge tray has channel slot formed therein, the channel slotIt is oppositely arranged for straight slot and with the resist-nailed seat groove.Staple cartridge tray provides support by channel slot to cutter.
As a further refinement of the present invention, the cutter further include Access Division, the Access Division is connected in describedChannel slot, and may be in response to the percussion force that is applied on the cutter or withdrawal force moves in the channel slot.CutterOn Access Division be connected in straight slot, easy to the bidirectionally limited cutter in the folding of resist-nailed seat.
As a further refinement of the present invention, the Access Division includes spaced foot and middle ear, the footExtend with middle ear by the cutter main body to two opposite side directions, the Access Division is in I-shaped.Access Division is by passageThe both sides of groove are housed into I-shaped receiving space, so as to be clamped with channel slot, to be moved along channel slot.
To sum up, surgical instruments according to the present invention, the supporting part of its cutter improve intensity by the improvement of structure, canEffectively to avoid that the accident of supporting part fracture occurs in surgical procedure, prevent the generation of malpractice.
Embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings.In retouching for the present inventionIn stating, it is to be understood that term " " center ", " longitudinal axis ", " transverse direction ", " length ", " width ", " thickness ", " on "," under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " clockwise ", " counterclockwise ",The orientation or position relationship of the instruction such as " axial direction ", " radial direction ", " circumferential direction " are based on orientation shown in the drawings or position relationship.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importanceOr the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed orImplicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, threeIt is a etc., unless otherwise specifically defined.
The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to for explaining the present invention, without being understood thatFor limitation of the present invention.
Shown in Figure 1, the surgical instruments 100 that a preferred embodiment of the present invention provides includes surgical stapling and cutterTool.Specifically, surgical instruments 100 includes Handleset 1, from the shaft member 2 of 1 Longitudinal extending of Handleset and is arranged at shaftThe end effector 3 of 2 one end of component.It should be noted that spatial terminology such as " vertical ", " level ", " right side ", " left side " etc.Provided herein with reference to attached drawing 1, the longitudinal axis of setting surgical instruments 100 is coaxial with the central axis of shaft member 2, and closesClose trigger 14 and firing trigger 16 is extended downwardly from the bottom of Handleset 1 is at an acute angle.However, in practical applications, outsideSection's apparatus 100 can be directed into various angles.Further, terms used herein " nearside " and " distal side " are relative to manipulationFor the clinician of the Handleset 1 of surgical instruments 100.Term " nearside " refers to close to the part of clinician, term" distal side " then refers to the part away from clinician.That is, Handleset 1 is nearside, and end effector 3 is distal side, as some zeroThe proximal end of component represents one end of relatively close Handleset 1, and distal end portion then represents the one of relatively close end effector 3End.
With reference to shown in Fig. 1 and Fig. 2, closure trigger 14 can be manipulated to position and close end effector 3, and end performsDevice 3 is connected to the distal end portion of shaft member 2.End effector 3 includes staple cartridge tray 32 and is pivotably connected to staple cartridge tray 32Resist-nailed seat 34, staple cartridge tray 32 are used to be operably supported the nail bin (not shown) being located therein, and resist-nailed seat 34 can openedOptionally moved between position and closing position.Closure trigger 14 is pressed towards the pistol grip 12 of Handleset 1, canShaft member 2 is promoted so that resist-nailed seat 34 pivots and then closed end portion actuator 3.In a preferred embodiment, surgical instruments100 further include release button 18, closure trigger 14 can be discharged by operating release button 18, so as to open end effector3 to readjust, promptly and position tissue.When pending tissue is entered between staple cartridge tray 32 and resist-nailed seat 34, surgeryDoctor can press closure trigger 14 until being locked, so that resist-nailed seat 34 is in the close position, i.e. end effector 3In closure state.
With continued reference to Fig. 1 and Fig. 2, end effector 3 further includes cutter 24, and cutter 24 are relative to staple cartridge tray 32 by canIt is operatively supported, specific in present embodiment, cutter 24 include opposite proximal end and distal end portion, wherein, cutter 24Proximal end be connected with the trigger shaft 26 being arranged in shaft member 2, and the distal end portion of cutter 24 is connected to by staple cartridge tray32 and the jaw member that forms of resist-nailed seat 34 in, and the other end of jaw member can be moved to from one end of jaw member.OnThe proximal end of cutter 24 and the connection mode of trigger shaft 26, and position and connection relation of the trigger shaft 26 with shaft member 2,It is same as the prior art or close, it is not elaborated herein.In short, cutter 24 can be subject to be transmitted by firing trigger 16Percussion force, and cutter 24 is moved by non-firing position firing position distad；Can also be in response to being applied to cuttingWithdrawal force on knife 24 is retracted into non-firing position by firing position.Percussion force, can be by turning to button 19 to the conversion of withdrawal forceRealize, it is same same as the prior art or similar as the structure and working method for turning to button 19, also repeat no more.Need to noteMeaning, the percussion campaign of cutter 24 and retraction movement must just allow to occur in the case where jaw member closes, i.e., onlyHave when closure trigger 14 is locked on pistol grip 12 so that resist-nailed seat 34 is in the close position, can just activate and hitTrigger 16 is sent out, to prevent from triggering cutter 24 to cut non-targeted group due to pressing firing trigger 16 accidentally in surgical procedureThe accident knitted.Similarly, the function of preventing firing trigger 16 from surprisingly being touched is realized as which kind of structure, the prior art isThere are announcement or enlightenment, details are not described herein again.
It refer to and introduce the distal end portion of cutter 24 and the connection of jaw member and cooperation shown in attached drawing 2-4 belowRelation.Staple cartridge tray 32 has the channel slot 322 being located therein, and the downside of 24 distal end portion of cutter is (based on the position shown by attached drawing 2For putting relation) it is placed in channel slot 322；Correspondingly, resist-nailed seat 34 has the resist-nailed seat groove 342 being located therein, and works as jawWhen component closes, the upside of 24 distal end portion of cutter enters in resist-nailed seat groove 342 so that cutter 24 can be along upper and lower both sidesSlit movement so that distad end cutting pending tissue.At the same time, the nail bin in staple cartridge tray 32 (does not show in figureGo out) driven by the cutter 24 of distal motion, staple (not shown) therein be cut knife 24 against wedge shape push awayReleased into device (not shown), tissue to be stapled is penetrated, because the distance between staple cartridge tray 32 and resist-nailed seat 34 are less than stapleHeight, the nib contacts resist-nailed seat 34 of staple support nail face 346 after be bent, and support 346 shape of nail face along resist-nailed seat 34Into specific shape, so as to fulfill the suture of cut tissue.
With reference to shown in Fig. 2, Fig. 5 and Fig. 6, cutter 24 include supporting part 242, i.e. the upside of 24 distal end portion of cutter is equipped withSupporting part 242, by supporting part 242, the upside of 24 distal end portion of cutter can enter when resist-nailed seat 34 is in the close position to be supportedNail seat groove 342, and may be in response to the percussion force that is applied on the cutter 24 or withdrawal force moves in resist-nailed seat groove 342.In the present embodiment, resist-nailed seat 34 includes inlet slot 344, and the width of inlet slot 344 is more than the width of resist-nailed seat groove 342, when toWhen nail seat 34 is in an open position, supporting part 242 be accommodated in it is in inlet slot 344 and spacing by the position-limited edge of inlet slot 344, withCutter 24 are avoided to be distally moved in the case where jaw member is not closed.And when resist-nailed seat 34 is switched to closing position,Resist-nailed seat groove 342 is opposite to be moved down, and supporting part 242 enters in resist-nailed seat groove 342.
With continued reference to shown in Fig. 5 and Fig. 6, cutter 24 include E types main body 241, supporting part 242 include autonomous agent 241 toThe lug 2421 of opposite sides extension, lug 2421 include free end 2421a and are connected to the root of 24 main body 241 of cutter2421b.In surgical procedure, only after pending tissue enters jaw member, surgeon can just press closure trigger14 make resist-nailed seat 34 in the close position, i.e. end effector 3 is in closure state, and position or thickness due to pending tissueDegree is different, and the required chucking power of jaw member is different, similarly, is organized in the reaction that resistance closure function is produced in jawPower also changes correspondingly.In the prior art, when pending tissue is thicker or it is harder when, the reaction force that resist-nailed seat 34 is subject to is big, itsWith the movement tendency for driving supporting part 242 reversely to pivot together so that lug 2421 bears larger pulling force, surveys by analysisTest result learns that the moment of flexure of root 2421b is maximum, if the sectional dimension of the root 2421b and free end 2421a of lug 2421Identical, then the root 2421b of lug 2421 bearing the bending stress of maximum because being easiest to be broken.In embodiments of the present invention,Using the design principle of the beam of uniform strength, the thickness of lug 2421 is successively decreased from root 2421b to free end 2421a, ensure lugThe sectional dimension of 2421 root 2421b is maximum so that each section flexure stress of lug is same or like, so that in resist-nailed seatIn the case that 342 space of groove is limited, to greatest extent improve material utilization rate and lug 2421 bearing capacity, make its avoid becauseBear huge pulling force and be broken.On the concrete structure of supporting part 242, the present invention provides three kinds of embodiments.Referring to Fig. 5 institutesShow, be the first embodiment of supporting part 242.Supporting part 242 includes the top surface of two 2421 free end 2421a of lug of connection,The top surface is parabola, and the top surface of supporting part 242 is the one side away from pulling force suffered by lug 2421, and top surface is parabola so thatThe bending stress that supporting part 242 is subject to along each section of Impact direction is close, is set further to the ideal of the beam of uniform strengthMeter, ensures the uniform intensity distribution of supporting part 242, further improves the performance of supporting part 242.
The second embodiment of supporting part 242 and the difference of first embodiment are the top surface for arc surface (notIllustrated), top surface is arc surface so that and the bending stress that supporting part 242 is subject to along each section of Impact direction is close,The ideal design of the beam of uniform strength is closer to, ensures the uniform intensity distribution of supporting part 242, and is easier machine-shaping.GinsengAs shown in Figure 6, it is the 3rd embodiment of supporting part 242, in this embodiment, lug 2421 includes the relatively close nailThe bottom surface of storehouse seat 32 and the back side away from the staple cartridge tray 32, since Fig. 6 does not illustrate staple cartridge tray 32, thus here in connection withPosition relationship explanation shown in Fig. 6, the back side is the upper surface of the lug 2421 shown in Fig. 6, and the following table that bottom surface is lug 2421Face, the back side are inclined-plane.Ramp structure is simple, easily processed into type.(inclined-plane has been made at the back side of lug into Fig. 6.)
In the supporting part 242 of three of the above embodiment, lug 2421 all has the bottom surface of relatively close staple cartridge tray 32,When jaw member clamp thicker or during compared with sclerous tissues, resist-nailed seat 34 has the trend moved to opening direction so that lug 2421Bottom surface stress, be particularly susceptible from fracture of root.Improvement backside structure is above examples provided to carry to strengthen lug 2421The scheme of power, in a preferred embodiment of the invention, bottom surface are additionally provided with fillet (only in the 3rd embodiment party close to the position of rootIn formula, another two embodiment does not have).The design of fillet solves the problems, such as that bottom surface Root Stress is concentrated, and further increasesThe bearing capacity of 2421 root of lug.The material of supporting part 242 is stainless steel, as to the improved supplement of structure, the optimization of materialThe intensity of supporting part 242 can further be lifted.
Addedly to say, resist-nailed seat groove 342 is matched somebody with somebody with 242 phase shape of supporting part, and supporting part 242 is contained in resist-nailed seat groove 342, and twoPerson's shape enters resist-nailed seat groove 342 prevented also from dust and other impurities and influences supporting part 242 in resist-nailed seat groove with that can avoid rockingThe smooth degree moved in 342.
Connection and the matching relationship of cutter 24 and resist-nailed seat 34 are described above, 2 and Fig. 3 is briefly situated between below in conjunction with the accompanying drawingsContinue the connection matching relationship of cutter 24 and staple cartridge tray 32.It is stated that, staple cartridge tray 32 has the channel slot being located therein above322, channel slot 322 and 342 position correspondence of resist-nailed seat groove, collaboration support cutter 24, and are that cutter 24 provide percussion and returnThe passage of contracting.Wherein, channel slot 322 is straight slot, and channel slot 322 provides accommodating space and route guidance for cutter 24, due toThe cutter 24 of Minimally Invasive Surgery are narrow and small and sharp keen, and the positioning for destination organization is more accurate, thus correspondingly, channel slot 322It is elongated and narrow.Cutter 24 include being used for the Access Division 244 for being connected in channel slot 322, and Access Division 244 may be in response to be applied toPercussion force or withdrawal force on cutter 24 move in channel slot 322, and the connection mode of clamping is conducive to open in resist-nailed seat 34Bidirectionally limited cutter 24 during conjunction.
Referring to shown in Fig. 5, Fig. 6, Access Division 244 includes spaced foot 2442 and middle ear 2441,2442 He of footMiddle ear 2441 are extended to form by the main body 241 of cutter 24 to two opposite side directions, and Access Division 244 is in I-shaped.ClampingPortion 244 houses the left and right sides of channel slot 322 into I-shaped receiving space, so as to be clamped with channel slot 322, so as to along logicalRoad groove 322 moves.In this preferred embodiment, Access Division 244 is made of stainless steel material.Since Access Division 244 needsTwo-way active force is born, the rigidity and intensity of stainless steel material make it from being damaged.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connectsConnect or be electrically connected or can communicate each other；It can be directly connected, can also be indirectly connected by intermediary, can be withIt is the interaction relationship of connection inside two elements or two elements, unless otherwise restricted clearly.For this areaFor those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second featureIt is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature existsSecond feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative ofFisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can beOne feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically showThe description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example descriptionPoint is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is notIt must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in officeCombined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this areaArt personnel can be tied the different embodiments or example described in this specification and different embodiments or exemplary featureClose and combine.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is exampleProperty, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentionedEmbodiment is changed, changes, replacing and modification.