CN204562255U - Medical stapler - Google Patents

Abstract

This utility model discloses a kind of Medical stapler, comprise percussion assembly, nail anvil seat, nail-anvil assembly, nail bin groupware, percussion assembly comprises nail bin push rod, nail bin push rod is provided with banking pin, a safety block that can coordinate with banking pin is provided with in nail anvil seat, safety block is provided with draw-in groove, is also provided with limiting section in nail anvil seat; When anastomat is in original state, safety block and limiting section and banking pin non-interference; When anastomat is at cock, safety block and limiting section offset, and described draw-in groove is positioned at described banking pin on the mobile alignment in the far-end of described Medical stapler proximally direction; When anastomat percussion complete return back to original state time, banking pin is fastened in draw-in groove, and safety block is distally gone up at the near-end of Medical stapler and carried out spacing to banking pin.These three kinds of states cover the once complete percussion process of nail bin groupware jointly, ensure that nail bin push rod by the percussion of secondary, can not ensure that the safety of operation.

Description

Medical stapler

Technical field

This utility model belongs to manufacture technology field of medical appliance, is specifically related to a kind of Medical stapler.

Background technology

Usually, anastomat is after completing seaming and cutting action, and doctor needs pressing button release to be opened by apparatus, makes nail bin and cutting knife be returned to initial position, thus is convenient to apparatus to take out from operative site.

But, due to doctor or the doctor that lacks experience of some carelessnesses, may after completing shot, again holding handle causes mistakenly hit to send out, or on carrying out during seaming and cutting operation once, the wrong apparatus of having pulled the trigger of taking carries out seaming and cutting operation, can cause the generation of malpractice like this.

Summary of the invention

The purpose of this utility model is to provide a kind of Medical stapler, and it can prevent the apparatus of having pulled the trigger from being pulled the trigger by secondary.

For realizing above-mentioned utility model object, this utility model provides a kind of Medical stapler, comprise percussion assembly, nail anvil seat, nail-anvil assembly and nail bin groupware, described percussion assembly comprises nail bin push rod and ejector pin bar, described percussion assembly distally moves from the near-end of described nail anvil seat for driving described nail bin groupware, described nail bin push rod is provided with a banking pin, a safety block that can coordinate with described banking pin is provided with in described nail anvil seat, described safety block is provided with a draw-in groove, is also provided with a limiting section in described nail anvil seat; Wherein, when described anastomat is in original state, described safety block and described limiting section and banking pin non-interference; When described anastomat is at cock, described safety block and described limiting section offset, and described draw-in groove is positioned at described banking pin on the mobile alignment in the far-end of described Medical stapler proximally direction; When described anastomat percussion complete return back to original state time, described banking pin is fastened in described draw-in groove, and described safety block is distally gone up at the near-end of described Medical stapler and carried out spacing to described banking pin.

As further improvement of the utility model, described safety block is constructed to the pivot revolving force of the proximal movement being subject to all the time making its far-end to described anastomat.

As further improvement of the utility model, in described nail anvil seat, be provided with the insurance block installing described safety block, described safety block and described insurance block pivotally connected, described limiting section is formed on described insurance block.

As further improvement of the utility model, between described safety block and described insurance block, be connected with flexible member.

As further improvement of the utility model, pushing slice of nail is provided with in described nail bin groupware, described pushing slice of nail is formed with the first support division, described first support division is positioned at the far-end of described banking pin, the far-end of described safety block is formed with the second support division, when described anastomat is in original state, on the second support division on described safety block and described pushing slice of nail, the first support division interferes with each other.

As further improvement of the utility model, described pushing slice of nail is provided with row cutter groove, described first support division comprises the Part I and Part II that are divided into described row cutter groove both sides.

As further improvement of the utility model, the holding section that described safety block comprises safety block body and protrudes out from described safety block body, described holding section and described safety block body limit described draw-in groove jointly, and the notch of described draw-in groove is towards described Medical stapler near-end.

As further improvement of the utility model, described holding section is formed with guide ridges towards the side of described safety block body distal end, and the angle between described guide ridges and described safety block body is obtuse angle.

As further improvement of the utility model, described guide ridges and described safety block body junction are set to arc transition.

As further improvement of the utility model, guiding face is provided with in described draw-in groove, described guiding face is set to when described banking pin is fastened in described draw-in groove, and described safety block can make described banking pin and described exact separation under the power effect of described nail bin groupware installation direction.

Compared with prior art, the safety block of the Medical stapler that this utility model provides by setting and the different mated condition of the banking pin on nail bin push rod, realize the anti-secondary percussion function of apparatus, during use, first nail bin groupware is mounted to nail anvil seat, on safety block with banking pin and limiting section non-interference, percussion assembly can to nail bin groupware force pull the trigger; When anastomat is in cock, safety block and limiting section offset to make the motion path of banking pin between the far-end and draw-in groove one end away from safety block of safety block; After a cutting and stitching job completes, nail bin groupware is drawn back into the near-end of nail anvil seat again, also namely anastomat is in percussion completion status, in the process being returned to this state, draw-in groove on safety block holds with banking pin gradually, stop nail bin push rod by the possibility again pulled the trigger, ensure that the safety of operation.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model Medical stapler one embodiment;

Fig. 2 is the detonation configuration schematic diagram that in this utility model Medical stapler one embodiment, nail bin groupware and nail-anvil assembly coordinate;

Fig. 3 is the detonation configuration schematic diagram of this utility model Medical stapler one embodiment;

Fig. 4 is the phantom of anastomat when original state in this utility model Medical stapler one embodiment;

Fig. 5 is the phantom of anastomat when cock in this utility model Medical stapler one embodiment;

Fig. 6 be in this utility model Medical stapler one embodiment anastomat after having pulled the trigger anastomat in opened condition time phantom;

Fig. 7 is safety block and the assembly structure schematic diagram insuring block in this utility model Medical stapler one embodiment;

Fig. 8 is the structural representation of safety block in this utility model Medical stapler one embodiment;

Fig. 9 is the structural representation insuring block in this utility model Medical stapler one embodiment;

Figure 10 is phantom when not installing nail bin groupware in this utility model Medical stapler one embodiment.

Detailed description of the invention

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

For clearly expressing position described in the application and direction, using exercises on apparatus author as reference, be near-end near one end of operator, the one end away from operator is far-end.Meanwhile, in this application, the below of definition anastomat is the direction that gripping handle is extended by housing, relative with below this, is namely defined as the top of anastomat.

As shown in Figure 1, in this utility model one embodiment, anastomat 100 comprises housing 10, by the supporting construction 20 of distally stretching out in housing 10, is connected to the nail anvil seat 30 of supporting construction 20 far-end.Nail anvil seat 30 can be fixedly connected with supporting construction 20, and its cross section is curved, forms gripping handle 40 below the near-end of housing 10.

Anastomat 100 also comprises nail bin groupware 32 and nail-anvil assembly 34.In the present embodiment, nail bin groupware 32 and nail-anvil assembly 34 are removably mounted on nail anvil seat 30, and and the mating shapes of nail anvil seat 30, namely be that the cross section of nail bin groupware 32 and nail-anvil assembly 34 is also all set to arc, so, can coincide to physiological tissue in working place less.

As shown in Figure 2, nail bin groupware 32 has nail bin 322, this nail bin 322 comprises a nail bin face (sign), nail bin face is arranged with in an interleaved manner the staple containing groove (sign) of a line or multirow, and nail bin groupware 32 also comprises and is arranged at pushing slice of nail 324 in nail bin 322 and cutter assembly.Suturing nail can be released by pushing slice of nail 324 in staple containing groove, and cutter assembly comprises the cutting knife 328 that a knife rest 326 and is arranged on knife rest 326 far-end.Also being configured with a nail bin cover 329 in nail bin groupware 32 for taking blocking effect to the suturing nail in nail bin 32 and cutting knife 328, preventing missing nail and mistakenly hit from sending out.

Nail bin face and pushing slice of nail 324 are respectively equipped with the row cutter groove 3242 with this cutting knife 328 adaptation, to support that the percussion of cutting knife 328 operates.In the present embodiment, staple containing slot, in the both sides of row cutter groove 3242, so, to organizing in cutting and stitching process, can be sewed up from disconnected tissue two broken ends of fractured bone simultaneously.

Coordinate with reference to shown in Fig. 2 and Fig. 3, in this utility model one embodiment, the far-end of nail bin groupware 32 is also connected with nail-anvil assembly 34, nail-anvil assembly 34 comprises nail anvil 342 and cutter anvil 344, while nail bin groupware 32 is installed to nail anvil seat 30, this nail anvil 342 and cutter anvil 344 can be arranged on nail anvil seat 30 ordinatedly.

Supporting construction 20 comprises left side and the right side support 22,24 of pair of opposing, left side and the far-end of right side support 22,24 are respectively arranged with the installing hole 222,242 that can coordinate with the pin-and-hole on nail anvil seat 30 and upper default projection 302 thereof, to realize being fixed to one another of nail anvil seat 30 and supporting construction 20.

The near-end of supporting construction 20 is connected to housing 10, and correspondingly, this housing 10 comprises left half housing 12 and right half housing 14, to be connected respectively left side and right side support 22,24.

Anastomat 100 also comprises percussion assembly 50, the driving member that percussion assembly 50 comprises the percussion handle 52 being located at anastomat 100 near-end, the nail bin push rod 54 driven by percussion handle 52 and connects percussion handle 52 and nail bin push rod 54.Nail bin push rod 54 can, under the effect of percussion handle 52, drive nail bin groupware 32 distally to move from the near-end of anastomat 100, with near nail-anvil assembly 34, finally makes anastomat 100 close.Now, if be placed with physiological tissue between nail bin groupware 32 and nail-anvil assembly 34, then this nail bin push rod 54 can drive nail bin groupware 32 to close this physiological tissue near nail-anvil assembly 34 with folder.

In this utility model one embodiment, driving member comprises front rod 562 and back link 564.The far-end of front rod 562 and nail bin push rod 54 pivotally connected by front rod pin (not shown), the near-end of front rod 562 is connected by back link pin (not shown) pivot with the far-end of back link 564, and the near-end of back link 564 is connected in supporting construction 20.

Continue to coordinate with reference to Fig. 3, anastomat 100 also comprises an anti-overflow needle assembly, this anti-overflow needle assembly comprises an anti-overflow pin push rod 62, connects the actuator push rod 64 of anti-overflow pin push rod 62, and the anti-overflow pin 61(be arranged in nail bin groupware 32 joins shown in Fig. 2), anti-overflow pin 61 is connected with actuator push rod 64 linkage ground.

In this utility model one embodiment, this anti-overflow pin push rod 62 is set to saddle type, and it is provided with symmetrical operating portion at near-end, and operating portion is given prominence to housing 10 and arranged.

Anti-overflow needle assembly also comprises the rotating crank 66 be connected with anti-overflow pin push rod 62.Rotating crank 66 is pivotally connected to support 20, is movably connected on nail bin push rod 54 simultaneously.By the operating portion of anti-overflow pin push rod 62, anti-overflow pin push rod 62 distally can be advanced from the near-end of anastomat 100, meanwhile, when advancing anti-overflow pin push rod 62, also the actuator push rod 64 that can link distally moves, thus associatedly promotes anti-overflow pin 61 to anastomat distal movement.

The operating process of anastomat 100 in this utility model one embodiment when Jia Bi physiological tissue is as follows:

Under the original state of anastomat 100, front rod 562 and back link 564 are arranged in an angle being less than 180 degree each other, and front rod 562 and back link 564 connecting portion are held in the support portion 522 in percussion handle 52.

When needs Jia Bi physiological tissue, can first physiological tissue be positioned between the nail anvil face of nail-anvil assembly 34 and the nail bin face of nail bin groupware 32, then, promote anti-overflow pin push rod 62 to move to anastomat far-end, thus interlock push rod 64 and anti-overflow pin 61 move to the far-end of anastomat, stretch out from nail bin groupware 32 to make anti-overflow pin 61, and finally coordinate with the receptacle (sign) that nail-anvil assembly 34 is provided with, close the opening between nail-anvil assembly 34 and nail bin groupware 32, also namely close the opening of nail anvil seat 30.

Then, percussion handle 52 is driven pivotally to rotate towards gripping handle 40, now, support portion 522 can support the connecting portion of front rod 562 and back link 564, front rod 562 and back link 564 is pivoted relative to each other with being forced to and towards the state motion tending to increase angle between the two.

In this utility model one embodiment, front rod 562 supported portion 522 can be urged to the relatively stable mated condition of pressing from both sides in slightly larger than 180 degree of angles with back link 564, and the support division 224 be finally held in supporting construction 20, now front rod 562 and back link 564 move to interference state.

In the process, slightly reduce again after the distance limited between the far-end of front rod 562 and the near-end of back link 564 is increased to ultimate range gradually, near-end due to back link 564 is fixed in supporting construction 20, the far-end of front rod 562 realizes the distal movement driving nail bin push rod 54 towards anastomat, nail bin push rod 54 driving force acted on nail bin groupware 32 nail bin groupware 32 is forced to close to nail-anvil assembly 34, thus Jia Bi physiological tissue.

In this utility model one embodiment, percussion assembly 50 also comprises an ejector pin bar 58, and it is engaged in nail bin push rod 54 slidably, and the surface that ejector pin bar 58 and knife rest 326 act on is made as the shape fitted each other.

In present embodiment, the surface that ejector pin bar 58 and knife rest 326 act on is curved.

Percussion handle 52 is connected with a wedged plate 524, this wedged plate 524 can be assemblied in nail bin push rod 54 at least in part to realize the interaction with ejector pin bar 58.

The operating process of anastomat 100 in this utility model one embodiment when cutting and sew up physiological tissue is as follows:

After completing the operation of above-mentioned Jia Bi physiological tissue, percussion handle 52 rotates towards the direction away from gripping handle 40 and realizes automatically reseting of percussion handle 52 under the drive of handle return spring (not shown).

In the process, wedged plate 524 in percussion handle 52 is triggered and is held on ejector pin bar 58, now, again by the direction pivot of percussion handle 52 towards gripping handle 40 is rotated, wedged plate 524 is made to promote the distal movement of ejector pin bar 58 to anastomat, to realize pulling the trigger while cutting knife 328 and pushing slice of nail 324, pushing slice of nail 324 suturing nail promoted in staple containing groove clenches on physiological tissue, and cutting knife 328 cuts corresponding physiological tissue simultaneously.

The near-end of ejector pin bar 58 has the holding part 582 extending nail bin push rod 54 outside, percussion assembly also comprises one and is connected to reseting elastic element 59 between this holding part 582 and supporting construction 20, in this utility model one embodiment, reseting elastic element 59 is an extension spring.

At ejector pin bar 58 by the process pulled the trigger, this reseting elastic element 59 is in extended state, and anastomat is under cock, namely be carried out cutting to physiological tissue and after sewing up, ejector pin bar 58 retracts by reseting elastic element 59 under the effect of self pulling force, simultaneously, the knife rest 326 being provided with cutting knife 328 can be retracted, so, anastomat completes whole percussion process, reaches percussion completion status.

After anastomat reaches percussion completion status, by pressing button release 70, nail bin push rod 54 is driven to return back to initial position from far-end, with the nail bin groupware 32 of open closed and nail-anvil assembly 34, anastomat is made to be in open mode, so that taken out by the tissue of cut stitching.

In this utility model one embodiment, button release 70 is movably connected in supporting construction 20 by a button release pin 702, and, the near-end of back link 564 also can by with the connection realization of this button release pin 702 and the relative fixing of supporting construction 20.

The far-end of button release 70 have can act on back link 564 support end 704, during pressing button release 70, this supports end 704 and front rod 562 and back link 564 can be driven towards forming the state motion being less than 180 degree of angles, namely be the moved beneath of connecting portion to anastomat of this front rod 562 and this back link 564, to destroy metastable mated condition between front rod 562 and back link 564, and then nail bin push rod 54 and nail bin groupware 32 are returned to opposite proximal end, thus apparatus is taken out from operative site.

Certainly, if desired reuse this anastomat, new nail bin groupware 32 and/or nail-anvil assembly 34 can be replaced, thus carry out the cutting and stitching of next time.But, inevitably, in operation process, can due to the error of operator, nail bin groupware 32 is caused again to be pulled the trigger when not being fully realized for various reasons and not changing, now by the cutting only having corresponding cutting knife 328 can implement physiological tissue in the nail bin groupware 32 of pulling the trigger, but lack corresponding suturing nail, and then cause accident surgery.For this reason, in the anastomat 100 that this utility model is mentioned, relative set insurance institution is to avoid the generation of this kind of situation.

Ginseng Fig. 4 to Fig. 6, nail bin push rod 54 is provided with a banking pin 542, be connected with a safety block 38 that can coordinate with banking pin 542 in nail anvil seat 30, safety block 38 is provided with draw-in groove 384.A limiting section 362 is also provided with in nail anvil seat, when anastomat 100 is in original state, when being assembled on nail anvil seat 30 by nail bin groupware 32 (Fig. 4 state), safety block 38 and banking pin 542 and limiting section 362 non-interference, now, percussion handle 52 can be pressed promote nail bin push rod 54 and distally move, thus drive nail bin groupware 32 distally to move, close to make anastomat 100, when anastomat 100 is at cock (Fig. 5 state), banking pin 542 moves to its distalmost end, safety block 38 and limiting section 362 offset, and on the mobile alignment in the draw-in groove 384 far-end proximally direction that is positioned at banking pin 542 self-fitting device, now, banking pin 542 and safety block 38 still non-interference, when anastomat 100 after percussion completes in opened condition time (Fig. 6 state), nail bin push rod 54 is drawn back into initial position from its far-end under the effect of button release 70, banking pin 542 proximally moves from its far-end simultaneously and is finally fastened in draw-in groove 384, safety block 38 distally carries out spacing to banking pin 384 at the near-end of Medical stapler 100, thus the motion of restriction nail bin push rod 54, play anti-secondary percussion effect.

Ginseng Fig. 4, when anastomat 100 is in original state, when being assembled on nail anvil seat 30 by nail bin groupware 32, safety block 38 is non-interference with banking pin 542, draw-in groove 384 is separated with banking pin 542, the motion of nail bin push rod 54 is not subject to the restriction of safety block 38, and nail bin groupware 32 unhinderedly can be pulled the trigger under the driving of nail bin push rod 54 and ejector pin bar 58.Adapt to ground therewith, pushing slice of nail 324 in nail bin groupware 32 is formed with the first support division 3241, this the first support division 3241 is positioned at the far-end of banking pin 542, when anastomat 100 is in original state, be assembled into after on nail anvil seat 30 by nail bin groupware 32, the first support division 3241 on the far-end of safety block 38 and pushing slice of nail 324 interferes with each other, to limit the rotation of safety block 38, preferably, the far-end of safety block 38 is formed with corresponding second support division 382, when nail bin groupware 32 is in original state, first support division 3241 can interfere with each other with the second support division 382 on safety block 38.In the present embodiment, the first support division 3241 comprises the Part I and Part II that are arranged at row cutter groove 3242 both sides respectively.

Ginseng Fig. 5, when anastomat 100 is at cock, ejector pin bar 58 self-fitting device near-end under the effect of percussion handle 52 distally moves, thus distally move the while of promoting pushing slice of nail 324 and cutting knife 328, safety block 38 to lose on pushing slice of nail 324 first support division 3241 to its interference effect, safety block 38 and then do the rotary motion of pivot, until the limiting section 362 in nail anvil seat 30 supports with safety block 38, stops the further rotation of safety block 38.In the process of anastomat percussion, the all or part of structure motion of draw-in groove 384 is on the motion path of banking pin 542, after ensureing that nail bin push rod 54 is pulled, banking pin 542 on it can be engaged in draw-in groove 384, simultaneously, the far-end of safety block 38 departs from the motion path of banking pin 542, ensures that nail bin push rod 54 can return.

Ginseng Fig. 6, when anastomat 100 after percussion completes in opened condition time, pressing button release 70, the far-end of nail bin push rod 54 self-fitting device 100 under the effect of button release 70 proximally moves and returns back to initial position, nail bin groupware 32 under the drive of nail bin push rod 54 from the far-end of nail anvil seat 11 proximally time, can not be produced relative displacement by the pushing slice of nail 324 of pulling the trigger to nail bin 121 far-end in nail bin 121, also be, when nail bin groupware 32 is in percussion completion status, the first support division 3241 on pushing slice of nail 324 can not return back to and can produce the position of interfering to the far-end of safety block 38, and the banking pin 542 in nail bin push rod 54 activated towards the proximal movement of safety block 38, until hold each other with the draw-in groove 384 on safety block 38.

Coordinate with reference to Fig. 7 to Fig. 9, in order to ensure the smooth enforcement of above-mentioned action, safety block 38 comprises the holding section 383 that safety block body 381 and self-protective block body 381 protrude out, this holding section 383 limits above-mentioned draw-in groove 384 jointly with safety block body 381, preferably, the notch of this draw-in groove 384 is towards anastomat 100 near-end.Holding section 383 is formed with guide ridges 385 towards the side of safety block body 381 far-end, and the angle between this guide ridges 385 and safety block body 381 is obtuse angle.It should be noted that, " obtuse angle " mentioned here has the expansion angle that is greater than vertical angle for illustrating between guide ridges 385 and safety block body 381, and the junction not limited between guide ridges 385 and safety block body 381 is sharp-pointed, on the contrary, guide ridges 385 and safety block body 381 junction are set to arc transition, are engaged in draw-in groove 384 along guide ridges 385 preferably to guide banking pin 542.

When anastomat 100 after original state, cock and percussion complete anastomat in opened condition between switch time, safety block 38 is as a driving link of action, in particular, with by the mode rotated with driving, the difference coordinated in above-mentioned several state with nail bin groupware 32 and nail bin push rod 54 is realized.

Be provided with the insurance block 36 for installation insurance block 38 in nail anvil seat 30, safety block 38 is pivotally connected with insurance block 36.Particularly, safety block 38 and insurance block 36 are provided with the installing hole (sign) corresponded to each other, and a pivotal axis 37 is each passed through those installing holes and realizes safety block 38 and insure the pivotally connected of block 36.Simultaneously, in order to realize the rotary motion of above-mentioned safety block 38, it can be the torsion spring that actuatable safety block 38 is such as set on pivotal axis 37, replace and preferably, in the present embodiment, realize by being connected flexible member 39 between safety block 38 with insurance block 36, this flexible member 39 gives safety block 38 1 pivot revolving force all the time, and the far-end of effect safety block 38 has a kind of trend of the proximal movement to anastomat 100 all the time.

As preferred embodiment, above-mentioned limiting section 362 is formed on insurance block 36.Safety block 38 is provided with the first supporting surface 387, limiting section 362 is correspondingly provided with the second supporting surface 364 optionally offseted with the first supporting surface 387 on safety block 38, anastomat 100, when original state, presss from both sides at an angle between this first supporting surface 387 and second supporting surface 364; Anastomat 100 is when cock, and the first supporting surface 387 and the second supporting surface 364 support, mutually to limit the motion of safety block 38; Anastomat 100 after percussion completes in opened condition time, namely nail bin groupware 32 is returned in the process of initial position by nail bin push rod 54, banking pin 542 is engaged in draw-in groove 384 along guide ridges 385, safety block 38 can be forced to ground pivotable and the first supporting surface 387 is separated momently with the second supporting surface 364, until anastomat 100 opens i.e. nail bin groupware 32 when returning back to original state completely, the first supporting surface 387 and the second supporting surface 364 support again each other.Certainly, in some embodiments, after percussion completes anastomat in opened condition time, first supporting surface 387 and the second supporting surface 364 also and not necessarily be set to support each other, and only need to ensure coordinating of draw-in groove 384 and banking pin 542, above-mentioned what illustrate is only one preferred embodiment, and and unrestricted.

Ginseng Figure 10, in the present embodiment, also be provided with guiding face 386 in draw-in groove 384, this guiding face 386 is set to when banking pin 542 is fastened in draw-in groove 384, and safety block 38 can make banking pin 542 be separated with draw-in groove 384 under the effect of the power of nail bin groupware 32 installation direction.After the nail bin groupware after percussion takes off by user, draw-in groove 384 on safety block 38 is in banking pin 542 state be fitted to each other, and when the nail bin groupware again more renewed, user is without the need to paying close attention to banking pin 542 and draw-in groove 384 mated condition now, the first limiting section 3241 on pushing slice of nail 324 in the nail bin groupware of not pulling the trigger understands the far-end effect with safety block 38, draw-in groove 384 is made by oneself in untie-sell 542 depart from, after ensureing that nail bin groupware is changed, apparatus can be pulled the trigger smoothly.

In the use procedure of this utility model Medical stapler 100, first nail bin groupware 32 is mounted to (shown in Fig. 4 state) on nail anvil seat 30, the first support division 3241 in nail bin groupware 32 on pushing slice of nail 324 is interfered with the far-end of safety block 38, safety block 38 is not in contact with each other with the banking pin 542 on nail bin push rod 54, and percussion assembly 50 can make the relative nail-anvil assembly of nail bin groupware 32 close and pull the trigger nail bin groupware 32 force to nail bin push rod 54 force; Nail bin groupware 12 is from starting to be pulled the trigger to by the process after pulling the trigger, anastomat is in cock (shown in Fig. 5 state), the first support division 3241 on pushing slice of nail 324 is separated gradually with safety block 38, simultaneously, under the stretching action of flexible member 39, safety block 38 rotary motion, and make the moving line of banking pin 542 between the far-end and holding section 383 of safety block 38, ensures that nail bin push rod 54 can guarantee that banking pin 542 can be engaged in draw-in groove 384 while return smoothly; After a cutting and stitching job completes, nail bin groupware 32 is drawn back into the near-end of nail anvil seat 30 again, also namely anastomat 100 is in the open mode after having pulled the trigger (shown in Fig. 6 state), in the process being returned to this state, banking pin 542 crosses holding section 383 along guide ridges 385, and be finally engaged in draw-in groove 384, stop possible by what again pull the trigger by the nail bin groupware 32 of pulling the trigger, ensure that the safety of operation.

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

A series of detailed description listed is above only illustrating for feasibility embodiment of the present utility model; they are also not used to limit protection domain of the present utility model, all do not depart from this utility model skill equivalent implementations of doing of spirit or change all should be included within protection domain of the present utility model.

Claims (10)

1. a Medical stapler, comprise percussion assembly, nail anvil seat, nail-anvil assembly and nail bin groupware, described percussion assembly comprises nail bin push rod and ejector pin bar, described percussion assembly distally moves from the near-end of described nail anvil seat for driving described nail bin groupware, it is characterized in that, described nail bin push rod is provided with a banking pin, and be provided with the safety block that can coordinate with described banking pin and a limiting section in described nail anvil seat, described safety block is provided with a draw-in groove; Wherein, when described anastomat is in original state, described safety block and described limiting section and banking pin non-interference; When described anastomat is at cock, described safety block and described limiting section offset, and described draw-in groove is positioned at described banking pin on the mobile alignment in the far-end of described Medical stapler proximally direction; When described anastomat percussion complete return back to original state time, described banking pin is fastened in described draw-in groove, and described safety block is distally gone up at the near-end of described Medical stapler and carried out spacing to described banking pin.

2. Medical stapler according to claim 1, is characterized in that, described safety block is constructed to the pivot revolving force of the proximal movement being subject to all the time making its far-end to described anastomat.

3. Medical stapler according to claim 2, is characterized in that, is provided with the insurance block installing described safety block in described nail anvil seat, described safety block and described insurance block pivotally connected, described limiting section is formed on described insurance block.

4. the Medical stapler according to Claims 2 or 3, is characterized in that, is connected with flexible member between described safety block and described insurance block.

5. Medical stapler according to claim 1, it is characterized in that, pushing slice of nail is provided with in described nail bin groupware, described pushing slice of nail is formed with the first support division, described first support division is positioned at the far-end of described banking pin, the far-end of described safety block is formed with the second support division, and when described anastomat is in original state, on the second support division on described safety block and described pushing slice of nail, the first support division interferes with each other.

6. Medical stapler according to claim 5, is characterized in that, described pushing slice of nail is provided with row cutter groove, and described first support division comprises the Part I and Part II that are divided into described row cutter groove both sides.

7. Medical stapler according to claim 1, it is characterized in that, the holding section that described safety block comprises safety block body and protrudes out from described safety block body, described holding section and described safety block body limit described draw-in groove jointly, and the notch of described draw-in groove is towards described Medical stapler near-end.

8. Medical stapler according to claim 7, is characterized in that, described holding section is formed with guide ridges towards the side of described safety block body distal end, and the angle between described guide ridges and described safety block body is obtuse angle.

9. Medical stapler according to claim 8, is characterized in that, described guide ridges and described safety block body junction are set to arc transition.

10. Medical stapler according to claim 1, it is characterized in that, guiding face is provided with in described draw-in groove, described guiding face is set to when described banking pin is fastened in described draw-in groove, and described safety block can make described banking pin and described exact separation under the power effect of described nail bin groupware installation direction.