CN208876619U - A kind of surgical instrument containing hollow trigger - Google Patents

Abstract

The utility model discloses a kind of surgical instruments containing hollow trigger, include distal end working head, proximal handle and the lengthening bar portion extended therebetween；The handle includes front handlebar, rear handle and the arm pivot post for connecting it, and the front handlebar and rear handle can rotate relative to the arm pivot post；The handle also includes latch mechanism；The latch mechanism includes the cantilever being linked together with rear handle, and the latch mechanism also includes trigger；The trigger is mounted in the front handlebar and its partial denudation is in the outside of front handlebar, and the trigger includes the blind cavity configuration of trigger shaft and a side opening；After handle closes up towards the front handlebar after described, the cantilever can penetrate the through-hole of front handlebar and enter in the blind cavity configuration；The trigger can be rotated around the trigger shaft, and the shape and size of the blind cavity configuration meet: not interfered with the cantilever when trigger rotation, while the cantilever distal end of the cantilever is not exposed except front handlebar and trigger.

Description

A kind of surgical instrument containing hollow trigger

Technical field

The utility model relates to Minimally Invasive Surgery instrument more particularly to a kind of surgical instruments containing hollow trigger.

Background technique

Surgical operating instrument has had centuries history, and doctor completes tissue with different surgical instruments in surgical operation Crawl is sheared, separation, blood coagulation, and the operation such as suture closure, surgical operating instrument develops mature by centuries.Laparoscope The clinical of operation is carried out more than 30 years, just in rapid advances.Briefly, laparoscopic surgery, that is, operative doctor is using lengthening Laparoscope hand-held apparatus, enter patient's body via the puncture channel of natural cavity or building, complete tissue crawl, shearing, Separation, blood coagulation, the operation such as suture closure.

Laparoscopic surgery opens abdomen ophthalmic surgical relative to tradition, and main advantage is small for patient trauma to can reduce slight illness Restore with acceleration.Current endoscope-assistant surgery generally includes operation on gallbladder, laparoscopic inguinal hernia repair, and peritoneoscope stomach bottom folds Operation, laparoscopic splenectomy, the operation such as laparoscopic appendectomy operation, the whole operation difficulty of endoscope-assistant surgery is larger, Used time is longer, and operative doctor needs 1~3 hour in lasting surgical procedure.Due to the limitation of operative space, operative doctor is often needed Will be for a long time with difficult gesture operation instrument, doctor is easy fatigue, or even induces arthritis, the risks such as scapulohumeral periarthritis.Laparoscope Hand-held apparatus should meet Human Engineering Principle, support a variety of gripping gimmicks, reduce extreme operation posture and the sense that lessens fatigue.

Operate it is same instrument when, different operative doctors or same operative doctor are in different operations or same operation In in specific a certain operating process, the gimmick that doctor holds surgical instrument is had nothing in common with each other.Studies have shown that in endoscope-assistant surgery, such as Finger gripping shown in Fig. 2 is enforced the law pinch grip (or for precision grip method precision grip) and hand as shown in Figure 3 The grasp pam grip (or for energetically clinch force grip) that enforces the law is most common two kinds of gimmicks.

In existing hysteroscope hand-held apparatus, for example, endoscope-assistant surgery scissors, endoscope-assistant surgery elastic separating plier, endoscope-assistant surgery nipper etc., As shown in Figure 1, generalling use scissorstype handle, a variety of gripping gimmicks can be supported.In order to which lasting realization clamps organ or tissue, It is existing that corresponding locking mechanism, such as Patent No. are increased using the surgery hand-held apparatus of scissorstype handle The Chinese patent of CN2014108503121 discloses the card locking device and surgical instrument of a kind of carrier state handoff functionality, however existing Although some patents realize the clamping of tissue or organ and unlock uses, but due to the individual difference and hand of operative doctor The complexity of art environment mainly has following problems urgently to be resolved:

On the one hand, the hand-type of different operative doctors is of different sizes, and the operation handedness of different operative doctors is also not to the utmost Identical, the finger that existing surgical instrument generally can satisfy most operative doctors can be carried out in operation is normally carried out operation, But it seldom considers how that the finger for making operative doctor comfortably operates, needless to say meets the operative doctor that minority has particular/special requirement Demand, such as: be accustomed to left slash operative doctor and according to each finger of operative doctor it is different firmly habit matched The finger zone of action；

On the other hand, how operative doctor uses the same hand, easily carries out a variety of in continuous surgical procedure Different gimmicks switch over, for example finger gripping is enforced the law the switching between palm grip method, or under different gimmick states The switching for carrying out different conditions facilitates operative doctor that can carry out various accurate operations using optimal hand-held posture, and subtracts The fatigue of the youthful and the elderly's time operation；

In addition, how for tissue or organ need the continuous operation for clamping and unclamping with without locking mechanism participate in into Operation etc. is switched fast between capable quick drawing and strip operation.

The prior art mainly passes through increase operation path, is combined use using the surgical instrument of different function, or Using modes such as more people auxiliary: using the hand-held apparatus of with locking mechanism such as in an operation path, another operation is logical Common hand-held apparatus is used in road；Or the surgical instrument of different function is subjected to disengaging abdomen in the same operation path Switching.Nonetheless, also only part is able to satisfy the realization requirement of operative doctor, but really increases the pain of patient, increases The various operation risks of operating time and thus bring.

Utility model content

Therefore, in order to solve problems in the prior art, in the one aspect of the utility model, propose a kind of containing hollow trigger Surgical instrument, include distal end working head, proximal handle and the lengthening bar portion extended therebetween；The handle includes preceding Hand, rear handle and the arm pivot post for connecting it, and the front handlebar and rear handle can make rotation fortune relative to the arm pivot post It is dynamic；The working head includes a pair of of binding clip and the driving mechanism being attached thereto；The lengthening bar portion includes runner, outer bar portion and Draw-in bar, the outer bar portion and runner are fixed together and are mounted in front handlebar, described draw-in bar one end and the driving machine Structure connects and its other end is connect with rear handle, and the handle also includes latch mechanism；The latch mechanism includes to be linked as with rear handle The cantilever of one, the latch mechanism also includes trigger；The trigger is mounted in the front handlebar and its partial denudation is at preceding The outside of hand, the trigger include the blind cavity configuration of trigger shaft and a side opening；Handle is closed towards the front handlebar after described After holding together, the cantilever can penetrate the through-hole of front handlebar and enter in the blind cavity configuration；The trigger can turn around the trigger Axis rotation, and the shape and size of the blind cavity configuration meet: do not interfere with the cantilever when trigger rotation, while institute The cantilever distal end for stating cantilever is not exposed except front handlebar and trigger.

A kind of optional technical solution, wherein the latch mechanism also includes locking plate, button and elastic element；The lock machine Structure includes effective model and invalid mode；The locking plate includes the lockhole to match with the cantilever shape and size, described outstanding Arm penetrates the lockhole；The trigger also includes the first cam surface, the second cam surface and finger buckle, the button and described first Cam surface interaction, drives the trigger to rotate around trigger shaft, realization latch mechanism effective model and invalid mode it Between switch.

A kind of optional technical solution, wherein when the latch mechanism is effective model, described in the elastic element driving Locking plate be allowed to anodontia cantilever tight fit, handle closes up towards front handlebar after permission and handle is opened away from front handlebar after limiting, As lock function；The second cam surface property of can choose is contacted with the locking plate, applies finger buckle described in outer power drive So that the trigger is rotated around trigger shaft, and the second cam surface drives the locking plate movement, is allowed to and anodontia cantilever gap Cooperation, handle is opened away from front handlebar after permission, as unlocking function.

A kind of optional technical solution, wherein the button include the first button and the second button, first button and Second button is separately mounted to two sides of the front handlebar；The front handlebar includes the long and narrow cunning through two side Slot, first button and the second button can slide in the long and narrow sliding slot；It is characterized in that, the direction of the long and narrow sliding slot It is basically parallel to the lengthening bar portion.

A kind of optional technical solution, wherein the rear side of runner is arranged in the long and narrow sliding slot, and meets following require: Left or right hand is enforced the law using finger gripping when operating the handle, what the index finger of the hand of operation can be convenient stir one of them by Button；When left or right hand operates the handle using palm grip method, what the thumb of the hand of operation can be convenient stirred wherein one A button.

A kind of optional technical solution, wherein the latch mechanism also includes locking bolt, button and elastic element；The lock machine Structure includes effective model and invalid mode；The cantilever includes multiple sawtooth, and the locking bolt includes to match with the sawtooth Lock tooth；The trigger also includes the first cam surface, the second cam surface and finger buckle, the button and the first cam surface phase Interaction drives the trigger to rotate around trigger shaft, realizes that latch mechanism switches between effective model and invalid mode.

A kind of optional technical solution, wherein when the latch mechanism is effective model, described in the elastic element driving Locking bolt is mutually twisted the lock tooth and the sawtooth, before handle deviates from after handle closes up towards front handlebar and limited after permission Handle opens, as lock function；The second cam surface property of can choose is contacted with the locking bolt, applies outer power drive institute Stating finger buckle rotates the trigger around trigger shaft, and the second cam surface drives the locking bolt movement, makes the lock tooth It is mutually disengaged with sawtooth, handle is opened away from front handlebar after permission, as unlocking function；

A kind of optional technical solution, wherein the button include the first button and the second button, first button and Second button is separately mounted to two sides of the front handlebar；The front handlebar includes the long and narrow cunning through two side Slot, first button and the second button can slide in the long and narrow sliding slot；The direction of the long and narrow sliding slot is basically parallel to The lengthening bar portion.

A kind of optional technical solution, wherein the rear side of runner is arranged in the long and narrow sliding slot, and meets following require: Left or right hand is enforced the law using finger gripping when operating the handle, what the index finger of the hand of operation can be convenient stir one of them by Button；When left or right hand operates the handle using palm grip method, what the thumb of the hand of operation can be convenient stirred wherein one A button.

Detailed description of the invention

In order to more fully understand the essence of the utility model, it is described in detail below in conjunction with attached drawing, in which:

Fig. 1 is a kind of surgical operating instrument simulation schematic diagram of prior art；

Fig. 2 is enforced the law schematic diagram shown in Fig. 1 using finger gripping；

Fig. 3 is that palm grip method schematic diagram is used shown in Fig. 2；

Fig. 4 is the surgical operating instrument stereoscopic schematic diagram of the utility model；

Fig. 5 is surgical instrument finger control partition schematic diagram described in Fig. 4；

Fig. 6, which is Fig. 4, to carry out when finger gripping is enforced the law effective model using the right hand and switches schematic diagram to invalid mode；

Fig. 7, which is Fig. 4, to carry out when finger gripping is enforced the law invalid mode using the right hand and switches schematic diagram to effective model；

Fig. 8 is Fig. 4 when carrying out palm grip method using right hand effective model switches side schematic diagram to invalid mode；

Fig. 9 is Fig. 7 when carrying out palm grip method using right hand effective model switches other side schematic diagram to invalid mode；

Figure 10 is the exploded view of surgical instrument described in Fig. 4；

Figure 11 is the perspective view of button sliding block shown in Figure 10；

Figure 12 is the another three-dimensional view of button sliding block shown in Figure 11；

Figure 13 is the perspective view of trigger shown in Figure 10；

Figure 14 is locking plate schematic diagram described in Figure 10；

Figure 15 is front handlebar schematic internal view shown in Figure 10；

Figure 16 is the schematic internal view of front handlebar lid shown in Fig. 10；

Figure 17 is the cut away view under the utility model invalid mode；

Figure 18 is 18-18 partial enlarged view shown in Figure 17；

Figure 19 is the lock state cut away view under the utility model effective model；

Figure 20 is 20-20 partial enlarged view shown in Figure 19；

Figure 21 is the utility model unlocked state cut away view；

Figure 22 is 22-22 partial enlarged view shown in Figure 21；

Figure 23 is the exploded view of the surgical instrument of another embodiment；

Figure 24 is 24-24 partial enlarged view shown in Figure 23；

In all views, identical label indicates equivalent part or component.

Specific embodiment

Disclosed herein is the embodiments of the present invention, it should be understood, however, that disclosed embodiment is only this reality With novel example, the utility model can be realized by different modes.Therefore, this disclosure be not to be construed for It is restrictive, but only as the basis of claim, and it is originally practical new as instructing those skilled in the art how to use The basis of type.

With reference to Fig. 1-4, for convenience of stating, the side of subsequent all Proximity operation persons is defined as proximal end, and far from operator One side is defined as distal end.

As shown in Figure 1-3, working as casing especially in endoscope-assistant surgery carrying out surgical operation in conjunction with described in foregoing background Component (not shown) is inserted in place, and various Minimally Invasive Surgery instruments, such as surgery hand-held apparatus 10 can pass through sheath assembly shape At channel be inserted into body cavity.Possibility needs while the one or more sheath assemblies of use in surgical procedure, and surgery hander Tool 10 also needs to configure one or more progress according to operation while operating.Fig. 1 is a kind of typical surgery hand of the prior art Holder tool 10, the working head 106 including distal end, proximal handle 11 and the lengthening bar portion 105 extended therebetween；The handle packet Containing front handlebar 101, rear handle 102 and the arm pivot post 103 for connecting it, the front handlebar 101 and rear handle 102 can be relative to institutes Arm pivot post 103 is stated to rotate；The front handlebar 101 includes preceding finger loop 110, and the rear handle 102 includes thumb circle 120, preceding 111 bottom of finger loop is provided with support arm 112.The upside setting unlock trigger 115 of the preceding finger loop 111 is used In the locking and unlocking for realizing the front handlebar 101 and rear handle 102.

Current endoscope-assistant surgery generally includes operation on gallbladder, laparoscopic inguinal hernia repair, peritoneoscope stomach bottom folding hand Art, laparoscopic splenectomy, the operation such as laparoscopic appendectomy operation.The whole operation difficulty of endoscope-assistant surgery is larger, uses When it is longer, operative doctor needs 1~3 hour in lasting surgical procedure.In order to mitigate operation Chinese medicine growth time with difficult posture Instrument is operated, existing surgery hand-held apparatus is a degree of to consider Human Engineering Principle, can usually support a variety of hold Gimmick is held, it is a degree of to reduce extreme operation posture and the sense that lessens fatigue.Finger gripping as shown in Figure 2 enforces the law and such as Fig. 3 institute The palm grip method shown is most common two kinds of gimmicks.

Tractor is carried out as Fig. 1 and Fig. 2 are illustrated operative doctor and enforced the law using typical surgical hand-held apparatus 10 with finger gripping The grip state of official or grasping tissue: the third finger of a certain hand of operative doctor passes through the preceding finger loop 111, and middle finger is attached to 115 position of unlock trigger of the upside of preceding finger loop 111, medial surface of little finger press on the support arm 112；Its thumb Rotate back and forth the rear handle 102 around the arm pivot post 103 across the thumb circle 120 movement thumb, and by described The movement of handle 102 is converted into the movement of the distal end working head 106 after bar portion 105 will be described.

Tractor is carried out with palm grip method using typical surgical hand-held apparatus 10 as Fig. 1 and Fig. 3 illustrate operative doctor The grip state of official or grasping tissue: the palm of a certain hand of operative doctor is adjacent to the side of the handle 11, and thumb is pinned Rear handle 102 is clamped in palm side by handle 11, forms a U-shaped clamping, and little finger of toe is pressed at described preceding On the support arm 112 of hand 101, the third finger passes through the preceding finger loop 110, and middle finger is attached to the upper of the preceding finger loop 110 115 position of unlock trigger of side, movement rotate back and forth the front handlebar 101 around the arm pivot post 103, and by the bar The movement of handle 102 is converted into the movement of the distal end working head after portion 105 will be described.

In clinical application, the finger gripping is enforced the law of equal importance with palm grip method, and usually requires frequent switching. Such as when needing to carry out tissue removing and appear blood vessel in clinical operation, one hand of operating doctor holds ultrasound knife or elastic separating plier is small The heart it is thriving carry out tissue removing, another hand generally has to hold nipper operation organ or tissue, forms synergistic effect, side Tissue strip operation can accurately be completed.When operative site does not appear sufficiently, or carry out tissue removing position it is short When variation spatial extent in time is larger, operative doctor generallys use finger gripping and enforces the law to operate instrument, and needs lock machine Structure is set as invalid state.Those skilled in the art is to be understood that be enforced the law and latch mechanism invalid state using finger gripping When, operation instrument is the most flexible, therefore can open and close instrument quickly to grab, and clamp draws organ or tissue, flexibly Mobile organ or tissue, so as to matching tissue removing nimbly and freely.However it is enforced the law using finger gripping and there is no secondary locking When, the finger of operative doctor is quite tired.It is not moved when the position short time that operative site sufficiently appears or carry out tissue removing When, operative doctor is it is generally desirable to quickly be switched to lock function effective status, by the coupling mechanism force clamp tightly of instrument itself Organ or tissue pulls or stirs the organ or tissue of block vision.Under lock function effective status, instrument progress is not operated usually Multiple quick opening and closing movement.When the organ or tissue of crawl or drawing is larger or heavier, operative doctor or assistant are logical It often is switched to palm grip method, because palm grip method tends to force and the freer diastole of posture, facilitates and is grasped energetically Make or can reduce fatigue.

It is inconvenient that the latch mechanism effective status and invalid state of the surgical instrument 10 of the prior art described in Fig. 1 switch, especially The extremely difficult switching for carrying out effective status and invalid state when being using palm grip method.Further, since middle finger is exerted oneself, position is just It is 115 position of unlock trigger of the upside of preceding finger loop 111, when operating instrument progress organ crawl, if middle finger is slightly exerted oneself, holds It easily causes middle finger to keep handle 11 in the unlocked state by trigger squeeze 115, that is, latch mechanism false triggering is easy to cause to unlock.

A kind of surgical instrument 20 containing hollow trigger of the utility model embodiment is illustrated in detail in Fig. 4-22, includes distal end work Make head 23, proximal end scissorstype handle 21 and the lengthening bar portion 22 extended therebetween；The handle 21 includes front handlebar 206, after Handle 202 and the arm pivot post 261 for connecting it, and the front handlebar 206 and rear handle 202 can be relative to the arm pivot posts 261 rotate；The arm pivot post 261 is with 206 integrated injection molding of front handlebar and by shaft hole 222, by 206 He of front handlebar Handle 202 is flexibly connected afterwards.The arm pivot post 261 may be set to be independent part for being flexibly connected 206 He of front handlebar Handle 202 afterwards.The lengthening bar portion 22 includes runner 214, outer bar portion 213 and draw-in bar 215, the outer bar portion 213 and runner 214 are fixed together and are mounted in front handlebar 206, and described 215 one end of draw-in bar is connect with the driving mechanism 211 and it is another One end connect with rear handle 202 and is fixed in rear 202 fixation hole 221 of handle by fixing axle 218.

The working head 23 includes a pair of of binding clip 210 and the driving mechanism that is attached thereto, and the driving mechanism includes the One link block 217, the second link block 216, sliding block 212, actuating arm 211 and pin 219.First link block 217, the Two link blocks 216 respectively with the connection symmetrical above and below of a pair of of binding clip 210 and be fitted into actuating arm 211 together with sliding block 212 and use pin 219 is fixed.215 distal end of draw-in bar is connect with sliding block 212, drives the movement of the draw-in bar 215 band movable slider 212 to move, with cunning First link block 217 that block 212 is cooperatively connected, the second link block 216 drive a pair of of binding clip 210 to realize opening and closing.This field Technical staff it is readily conceivable that other link mechanisms for having disclosed, slide way mechanism or simple adaptation is done based on the prior art Property modification, may be used to substitute utility model described in working head 23 realize the same or similar function.Hand-held apparatus 20 Difference is configured according to the working head 23, the operating scissors with scissors head can be divided into, the nipper with serration friction clamp head, band The hoe scaler etc. on curved forceps head.As the development of surgery hand-held apparatus occurs more and more to cooperate different operation needs Different types of working head it is within the protection scope of the present utility model, no longer enumerate one by one herein.

In a kind of case study on implementation, the front handlebar 206 includes preceding finger loop 262, it is described after handle 202 include thumb circle 224.It operates the front handlebar 206 and rear handle 202 and rotates relative to the arm pivot post 261 and be converted into draw-in bar 215 linear motion, and make driving mechanism 211 that binding clip 210 be driven to realize closure or unclamp.The handle 21 also includes latch mechanism 24, the latch mechanism 24 includes effective model and invalid mode.Under invalid mode, the front handlebar 206 and rear handle 202 can It rotates relative to the arm pivot post 261 and realizes the opening and closing of working head 23；Under effective model, described preceding Hand 206 and rear handle 202 can rotate relative to the arm pivot post 261, and handle 202 is towards front handlebar 206 after permission Close up and handle 202 is opened away from front handlebar 206 after limiting, as lock function；It is rotated when applying outer power drive trigger shaft, Handle 202 is opened away from front handlebar after permission, as unlocking function.

Those skilled in the art is to be understood that in laparoscopic surgery, due to the limitation of operative space, operative doctor It is frequently necessary to for a long time with difficult gesture operation instrument, doctor is easy fatigue, or even induces arthritis, the risks such as scapulohumeral periarthritis. Therefore meet ergonomics or the laparoscope hand-held apparatus for mankind's Ergonomy (Ergonomics), can support a variety of grippings Gimmick reduces extreme operation posture and the sense that lessens fatigue, is even more important.It is published about the relevant mankind's function of laparoscopic surgery It is many to imitate the correlative study learned: representational research includes being published in Journal of Healthcare Engineering No. 4 the 587-603 pages of volume 3 of a review of the ergonomic issues in the in 2012 Laparoscopic operating rom details mankind's Ergonomy harm of laparoscopic surgical instruments, other more parts of documents In also refer to the both effectiveness defect of the mankind and its harm of hysteroscope instrument, but do not provide solution.It is published in Journal 2001 years of of laparoendoscopic&advanced surgical techniques volume 11 the 1st Technical report,new ergonomic design criteria for handles of laparoscopic Some human efficiency subject's evaluation measures are listed in dissection forceps, however its evaluation measures is confined to based on human body Surveying counts the decreased food size obtained, finger loop size design suggestion, and rough giving and evaluates existing handle The method that difference holds experience, however do not provide design recommendation relevant for functional performance or hint.

Ergonomics is an extremely complex subject, according to international ergonomics association (IEA) definition, Ergonomics be one " anatomy of the research people in certain working environment, physiology and in terms of it is various because Element；Study the interaction of people and machine and environment；Research people is at work, how family life neutralization unified consider when having a holiday Working efficiency, the health of people, safety and it is comfortable the problems such as subject.However up to the present, few in disclosed patented technology It is disclosed about laparoscope hand-held apparatus ergonomic applications case or correlative study.The utility model uses ergonomics Principle is proposed using the test and statistical research of the interdisciplinary studies such as anthropometry, biomethanics, time and work sutdy A kind of laparoscope hand-held apparatus that meeting ergonomics and its design method, application method.

Briefly, surgical instrument 20 is substantially carried out subregion by the utility model as shown in Figure 5: defining arm pivot post 261 224 center position length of thumb circle to rear handle 202 is D, and lengthening bar portion 22 includes first axle 1000, crosses arm pivot post 261 are arranged second axis 2000 with 1000 vertical direction of first axle, and the first axle 1000 and second axis 2000 intersect In intersection point 1001, intersection point 1001 is turned along 1000 proximate direction of first axle and along second axis 2000 by intersection point to handle The square area that length is D is arranged in axis direction, by square area along 1000 liang of equal parts (D/2) of first axle, along the second axis 2000 trisection of line (D/3) is set as the region A1, the region A2, the region A3 and the region B1, the region B2, the region B3.Need more into What one step was pointed out, aforementioned " 224 center position length of thumb circle of arm pivot post 261 to rear handle 202 is D ", the specific value of D It is not definite value, numerical value changes in a lesser section.Experimental study is carried out based on anthropometry and biomechanical principle Obtaining optimal D value section with statistics is 60≤D≤70 (unit: millimeter).

The hand-type of different crowd and different gripping gimmicks in order to balance in a kind of optional scheme, are arranged in the region A1 Control effective model and when invalid mode switching state the first button 237, setting trigger 205 in the region A2, A3 sets in region Middle finger pressing area is set, while runner 214 is set in the region B1.In another preferred technical solution, first button 237 settings are arranged in the region A1 in the corresponding region A1 of handle 21, the second button 237a along second axis 2000 and described first The position symmetric position A1-1 for the plane that axis 1000 is formed, operating the first button 237 or the second button 237a can control The switching of handle 21 realization effective model and invalid mode.

The working principle of button, trigger and roller position design is described more particularly below.Such as Fig. 6-8, when using finger gripping When enforcing the law, by taking the operation of the right hand of operative doctor as an example, the third finger passes through the preceding finger loop 262, and middle finger is attached to preceding finger loop The region A3 of 262 upside, index finger can flexibly control the region A1, the region A2 or the region B1.The index finger is in the region A1 Mainly play the role of along proximate, or the first button of promotion 237 of distal end proximally, the region A2 primarily serve by Voltage-controlled trigger processed 205 is primarily served in the region B1 and is fiddled with the effect of rotating wheel 214 along 214 direction of rotation of runner.

Further, when being enforced the law using finger gripping, index finger reaches the region B1 and is substantially at straight configuration.In stretching shape The index finger of state does push action or does front and back pushing action along 1000 direction of first axle in the region B1, it has not been convenient to force hair Power, therefore status button should not be set.Index finger comfortably can do rotary dial fortune along 214 direction of rotation of runner in the region B1 It is dynamic.For index finger at the region A1 and the region A2, finger is in bending state, it is possible to comfortably be pressed or be pushed and is dynamic Make.By the setting of the first button 237 in the region A1, and trigger 205 is arranged in the region A2, and runner 214 is arranged in the region B1, this Kind of setting so that index finger can easily stir with rotating wheel 214, while the first button 237 can easily be pushed to realize effective mould The switching of formula and invalid mode, while easily can press or pull the switching that trigger 205 realizes lock state and unlocked state. Those skilled in the art is to be understood that surgical field especially endoscope-assistant surgery field, and the index finger of operative doctor is logical It is commonly referred to as index finger, selection of the index finger usually not as output operating force operation handle, index finger is commonly used to control Instrument direction or switching state button etc..Aforementioned various states, the switching or operation of function are quite frequent, and in abdominal cavity In videoendoscopic surgery, due to the eyes of operative doctor usually will be close concern front horizontal direction monitor, and sight of bowing of having no time Oneself manipulation hand or patient region are examined, therefore the switching manipulation convenience of this various states is extremely important.

As shown in figure 9, when the right hand of operative doctor is enforced the law by finger gripping and switches to palm grip method, surgeon Palm be adjacent to the side of the scissorstype handle 21, thumb pins the pressing from both sides rear handle 202 to side of scissorstype handle 21 Tightly in palm, a U-shaped clamping is formed.At this point, stirring of still can be convenient of its index finger and rotating wheel 214, simultaneously It easily can press or pull the switching that trigger 205 realizes lock state and unlocked state；At this time since the clamping of palm stops, Index finger can not operate the first button 237 of switching state in the region A1, however the thumb of operative doctor is just pressed in A1- at this time 1 region, therefore can easily push the switching of the second button 237a realization effective model and invalid mode.

In the preferred technical solution of the utility model, first button 237 and the second button 237a are relative to along The plane that two axis 2000 and the first axle 1000 are formed it is substantially symmetric, those skilled in the art should be easy to manage Solution, this symmetric relation make doctor with left-hand finger clinch or palm grip method operation instrument 20, use with the right hand The operation of the surgical instrument 20 of the utility model is substantially equivalent, therefore repeats no more.

In conclusion the positional relationship of the first button described in the utility model, the second button, trigger and runner is arranged, The index finger when right hand (left hand) finger gripping is enforced the law can be met simultaneously and be conveniently accomplished runner rotation, effective model and invalid mode are cut It changes, lock state and unlocked state switching.Index finger, which is conveniently accomplished, when can also meet the right hand (left hand) palm grip method simultaneously turns Wheel rotation, lock state and unlocked state switching, thumb complete the switching of effective model and invalid mode.Moreover, this position The setting of relationship, can also meet simultaneously finger gripping enforce the law and finger gripping enforce the law between facilitate switching.Its advantages can be simple Summary description are as follows: can only rely on the touch feedback of operative doctor, convenient and efficient progress finger gripping enforces the law and palm grip method Transformation conveniently operates runner rotation, effective model and invalid mode switching, lock state and unlocked state switching.

Studies have shown that up to the present, there are no patented technologies or document to disclose laparoscope device described in the utility model Tool and its design method, application method.Also without any enterprise, group or personal disclosure, or production, or sale the utility model The laparoscopic instrument.It is disclosed in the prior art, common laparoscopic surgical instruments by its latch mechanism state switching presses Button setting the region B1 (such as U.S. Utility Patent US5626608 disclose structure), it is similar with this patented technology Mass production, and the laparoscopic surgical instruments (such as with laparoscope grasping forceps series of Auto Suture brand sale) used, will Latch mechanism status button is arranged in the region B1, is enforced the law when operating this kind of instrument using finger gripping, effective model and invalid mode The comfort of switching is not good enough, and is inconvenient to support the effective model under palm grip method and invalid mode switching.It is another normal The laparoscopic surgical instruments seen are locked/unlock trigger and are arranged in the region B2 and only comprising lock state and invalid state two State (such as U.S. Utility Patent US6117158 disclose structure), the mass production similar with this patented technology and Use laparoscopic surgical instruments (such as with ENDOPATH brand sale laparoscope grasping forceps series), be locked/unlock by Button is arranged in the region B2, is enforced the law using finger gripping or when palm grip method operates be inconvenient to carry out the correlation of lock function and switches. Another common laparoscopic surgical instruments will lock locking/unlocking trigger and be arranged in the region A3 and press invalidating pattern switching In the region A2, (such as U.S. Utility Patent US8551077, S. Utility application US20060004406 are draped over one's shoulders for button setting The structure of dew), the mass production similar with this patented technology, and the laparoscopic surgical instruments used are (such as with CLICKline The laparoscope grasping forceps series of brand sale), lock locking/unlocking trigger is arranged in the region A3 and presses invalidating pattern switching Button is arranged in the region A2.This design need to usually carry out lock locking/unlocking switching with middle finger operating trigger, be grasped with middle finger or index finger Make button and carry out invalidating pattern switching, operates and switch uncomfortable.It is important to note that being arranged trigger in A3 Region may cause inconvenience.Most common problem mainly includes that, when the instrument is in the lock state, no matter is operative doctor It is that finger gripping is enforced the law or palm grip method, when operation instrument (nipper) clamps organ or tissue and pulls mobile, middle finger is almost It requires easily to touch trigger for assisting force under this state, lead to false triggering, so that instrument is unexpectedly from lock state It is switched to unlocked state, organ or tissue is caused to slip, causes clinical use inconvenient, or even induce malpractice.

As Figure 10-16 depicts the Nomenclature Composition and Structure of Complexes of latch mechanism 24.As shown in Figure 10, the latch mechanism 24 includes trigger 205, locking plate 208, the anodontia cantilever 226 being linked together with rear handle 202.The anodontia cantilever 226 include from rear handle 202 to Anodontia cantilever 223 and the cantilever distal end 227 of outer protrusion.The anodontia cantilever 223 is set as arcuate structure, including cantilever The shape of inner wall 229 and cantilever outer wall 228, the cantilever inner wall 229 and cantilever outer wall 228 is substantially from 202 junction edge of handle Arm pivot post 261 is that the center of circle extends the anodontia cantilever 223 into composition isocentric circular arc.The 223 material packet of anodontia cantilever The plastic material for carrying out integrated injection molding with rear handle 202 is included, the even flexible material of other semi-rigid or rigid materials is also possible to Material is made.The latch mechanism 24 also includes button assembly 25 and elastic element 250, and the trigger 205 and is pressed elastic element 250 Button component 25 is installed along in the front handlebar 206.The elastic element 250 drives trigger 205 to be realized after pressing It resets.The trigger 205 controls locking plate 208 and locking and unlocking are realized in the cooperation of anodontia cantilever 226.It generallys use in the prior art Lock strap with teeth, the lock tooth of the lock strap are easy to expose outside handle, are likely to result in operative doctor finger or gloves scratch.Have simultaneously When in use, the density degree for locking tooth determines the spacing of each lock tooth to tooth lock strap, and then determines the working head of surgical instrument The degree of grip tissue organ.It should be appreciated by those skilled in the art that in drawing operation energetically, in order to keep continuing clamping leading It draws, if dynamics is inadequate, hold mode when can not achieve drawing energetically is easy to appear histoorgan landing, influences procedure, Even cause operative failure；If on the other hand working head excessively clamps, and may cause the damage of histoorgan, it is unfavorable for Patient restores.The lock strap by encryption lock tooth although can adjust working head clamping degree, since lock tooth is too small Latch mechanism may be made unreliable, cause latch mechanism failure mode, and certain lock space width is kept to may cause or clamp Power is inadequate or clamping force is excessive.The anodontia cantilever 223 and locking plate 208 of the utility model cooperate, and any position may be implemented Locking, meet chucking power conform exactly to it is different operation and different tissues organ site clamping requirements, realize electrodeless variation, make Surgical instrument 20 can keep suitable chucking power position and clamping force.

As shown in figs. 10-12, the button assembly 25 includes button sliding block 203 and the first button 237 and the second button 237a.The button block 203 includes the slide body 230 with limiting slot 231, and the slide body 230 includes slider side wall 234 (235) and limited block 233.The slider side wall 234 (235) and limited block 233 limit limiting slot 231 together.It is described Slider side wall 234 (235) extends outward the button mounting post fixed with the first button 237 and the second button 237a cooperation 232, push the first button 237 or the second button 237a to can be used for driving the button sliding block 203 from distally proximally sliding Or proximally slided to distal end, and then the trigger 205 is pushed to rotate, realize the switching of effective model and invalid mode.It is described First button 237 includes the fricting strip 238 with cambered surface, can be convenient finger force.

As shown in figure 13, the trigger 205 includes trigger shaft hole 258, the first cam surface 251,255 He of the second cam surface Finger buckle 259.The trigger 205 includes the trigger body 254 for being substantially in crescent shape, and the trigger body 254 is also possible to other shapes Shape, the setting of the first cam surface 251 is in 254 side of trigger body, and finger buckle 259 is arranged in 254 other side of trigger body.It is described Trigger body 254 is used for elastic elements 250 close to the 251 position providing holes 257 of the first cam surface.The trigger shaft hole 258 are arranged between the first cam surface 251 and finger buckle 259 through the trigger body 254.First cam surface 251 includes Cam curve section 253 and cam planarea 252.When promoting button component 25 is proximally mobile to distal end, the button assembly 25 limited block 233 is engaged respectively with the cam curve section 253 and cam planarea 252 of the first cam surface 251, into And the rotation of trigger 205 is pushed to realize that effective model switches to invalid mode.Second cam surface 255 is along the trigger body 254 Side extend outwardly, second cam surface 255 is with locking plate 208 described in 205 rotation forces of trigger and the nothing Tooth cantilever 226 realizes locking and unlocking.Blind cavity configuration 207, the blind cavity configuration 207 is arranged in 259 departing direction of finger buckle Including blind chamber opening 271 and blind cavity 272.The cantilever 226 can penetrate front handlebar 206 and enter institute by blind chamber opening 271 It states in blind cavity configuration 207.In the prior art, trigger is usually arranged as solid form, such as one of prior art in A2 Empty avoiding region is arranged in region, and trigger position is arranged in the region A3, and this setup, one side empty avoiding region can stop finger Its is set to be inconvenient to exert oneself, another aspect trigger position is exactly that middle finger is exerted oneself regional location, easily causes the maloperation of trigger.This Blind 272 geomery of cavity of utility model is bigger than 226 geomery of cantilever, and under any state, described outstanding Arm 226 and the blind cavity 272 do not interfere, and the blind cavity 272 makes cantilever distal end 227 is not exposed front handlebar and pulling Except machine.The trigger 205 can be held the cantilever 226 under closed configuration just by the way that hollow blind cavity configuration 207 is arranged It receives, avoids the empty avoiding region that protrusion is additionally set on front handlebar 206 from accommodating cantilever 226, effectively simplify front handlebar 206 Components, keep front handlebar 206 more succinct, simultaneously because being not provided with the limitation in empty avoiding region, the trigger 205 can be set It sets in the region A2, the shape of the front handlebar 206 can preferably match the firmly situation of finger, avoid the empty avoiding region of protrusion Stop exerting oneself for finger.

As shown in figure 14, the locking plate 208 includes the lockhole 284 to match with anodontia 226 shape of cantilever and size, The anodontia cantilever 226 penetrates the lockhole 284.The locking plate 208 includes the first sheet body 281, the second sheet body 283, Yi Jilian The changeover portion 282 of the two, first sheet body 281, the second sheet body 283 and set of transitions are connect into the locking plate for being substantially in " Z " font 208.Locking plate spring 204 is arranged in the proximal end face of second sheet body 283.Second sheet body 283 can pass through weldering with locking plate spring 204 It connects, or the modes such as movable axis limit connect.The lockhole 284 of first sheet body 281 includes the first lockhole wall 285 and the second lockhole Wall 286, the cantilever inner wall 229 and cantilever outer wall 228 of the first lockhole wall 285 and the second lockhole wall 286 and anodontia cantilever 226 It is substantially matching, and the distance between the first lockhole wall 285 and the second lockhole wall 286 are greater than cantilever inner wall 229 and cantilever outer wall 228 The distance between.208 material of locking plate includes rigid material, such as metal material, thermoset plastic material, also may include half Rigid type is made.When trigger 205 255 property of can choose of the second cam surface with the contact of the locking plate 208, apply external force drive Moving the finger buckle 259 rotates the trigger 205 around trigger shaft 161, and the second cam surface 255 drives the locking plate 208 movement, be allowed to anodontia 226 clearance fit of cantilever, after permission handle 206 away from front handlebar 202 opening；A kind of optional side Formula, when first sheet body 281 is substantially vertical with the anodontia cantilever 226, the first lockhole wall 285 and cantilever inner wall 229 Clearance fit, the second lockhole wall 286 and 228 clearance fit of cantilever outer wall, the anodontia cantilever 226 are rotated around arm pivot post 261, The anodontia cantilever 226 be free to pass through from the lockhole 284, and corresponding at this time is unlocked state or invalid mode. When first sheet body 281 is with anodontia 226 inclination contact of cantilever, the locking plate spring 204 drives the locking plate 208 to make With anodontia 226 tight fit of cantilever, the first lockhole wall 285 is pressed into contact with cantilever inner wall 229, the second lockhole wall 286 with Cantilever outer wall 228 is pressed into contact with, and the anodontia cantilever 226 is rotated around arm pivot post 261, and handle 202 is towards front handlebar after permission 206 close up and handle 202 is opened away from front handlebar 206 after limiting, and are at this time lock function.

The front handlebar 206 for installing fixed latch mechanism 24 is depicted as shown in Fig. 5, Fig. 6 and Figure 15-16.The front handlebar 206 It further include front handlebar lid 209 engaged therewith.The front handlebar 206 removes preceding 262 part of finger loop, big with front handlebar lid 209 It causes to be in symmetrical structure.In the substantially region A1-1 and the region A1, the front handlebar lid 209 and front handlebar 206 are symmetrically arranged One sliding slot 297 and second sliding slot 267, the first sliding groove 297 and second sliding slot 267 limit the button sliding block 203 along the chute Direction is moved back and forth.In the present embodiment, the first sliding groove 297 and second sliding slot 267 are long and narrow sliding slots, the long and narrow cunning The direction of slot is basically parallel to the lengthening bar portion 22, and it should be appreciated by those skilled in the art the first sliding grooves 297 and Two sliding slots 267 may be set to be arc chute or through slot.

In the substantially region A1-1 and the region A1, the front handlebar 206 turns comprising arm pivot post 261 and trigger fixed thereto Axis 269, the arm pivot post 261 and trigger shaft 269 can be set to independent part and the installation of front handlebar 206 is fixed, can also A part is molded into front handlebar 206.The front handlebar lid 209 is set with arm pivot post 261 and 269 corresponding position of trigger shaft Set fixed column 291 (299).A kind of optional technical solution, trigger 205 include trigger shaft 269, the trigger shaft 269 with The trigger shaft hole 269 of trigger 205 is arranged to an entirety, and the front handlebar lid 209 turns with the setting of 206 corresponding position of front handlebar Axis hole.In the substantially region B1 and its symmetrical region, the front handlebar 206 also includes the runner mounting groove 265 of remote location, described Front handlebar lid 209 includes runner mounting groove 295.The runner mounting groove 265 (295) limits runner together and does rotation fortune in slot It is dynamic.In the substantially region A2 and its symmetrical region, the front handlebar 206 and front handlebar lid 209 are anodontia outstanding including handle 202 after accommodating The cantilever groove 263 (293) that arm 226 passes through, the cantilever groove 263 (293) form complete cantilever opening, the cantilever open-mouth ruler It is very little to be greater than anodontia 226 outer dimension of cantilever, and anodontia cantilever 226 when being rotated around arm pivot post not with the cantilever groove 263 (293) Contact.The front handlebar 206 and front handlebar lid 209 further include the trigger channel 266 (296) for accommodating installation trigger 205, are hanged The perforative through-hole of arm slot 263 (293) and trigger channel 266 (296) composition front handlebar 206.The trigger channel 266 (296) When surgical instrument 20 is closed up, the trigger 205 can accommodate anodontia cantilever 226.The front handlebar 206 and front handlebar lid 209 It further include the support slot 264 (294) for limiting locking plate 208 and doing lever motion, the muscle that the support slot 264 (294) is protruded by two sides Item 260 (290) limits.Rib 260 (290) conduct when locking plate 208 makes rotating motion of the support slot 264 (294) Rotate supporting point.The front handlebar 206 and front handlebar lid 209 further include the spring groove 268 for limiting locking plate spring 204 (298), 204 one end of locking plate spring is connect with locking plate 208, and the other end is limited in spring groove 268 (298) in compression shape State.

As the careful latch mechanism 24 that depicts of Fig. 5 and Figure 17-20 switches between effective model and invalid mode.Work as finger Clinch, for the right hand operation of operative doctor, the third finger passes through the preceding finger loop 262, and middle finger is attached to preceding finger loop The region A3 of 262 upside, index finger can flexibly control the region A1, the region A2 or the region B1.When surgical instrument 20 needs When being rapidly performed by closure and opening operation, typically such as at this moment just need when operation on gallbladder carries out blood vessel exfoliation by hand Art instrument 20 is switched to invalid mode by effective model.The index finger is in the region A1 by along proximate promoting button component 25 The first button 237 it is mobile, first button 237 drives button block 203 along the first sliding groove 297 and second sliding slot 267 It is mobile.203 limited block 233 of button block interacts with first cam surface 251, and the trigger 205 is driven to surround Trigger shaft 269 rotates clockwise, and in the process, the second cam surface 255 of the trigger 205 is with 205 up time of trigger Second sheet body 283 of needle rotation forces locking plate 208 tilts and the lockhole along rotation counterclockwise, the rotation of the first sheet body 281 284 with anodontia 226 clearance fit of cantilever.When limited block 233 is moved to the cam planarea 252 of first cam surface 251 When, the trigger 205 forms self-locking with the button block 203, and the elastic element 250 is not capable of resetting.At this time latch mechanism 24 by Effective model is switched to invalid mode, and it should be appreciated by those skilled in the art under invalid mode, due to the lockhole 284 It is in clearance fit state always with anodontia 226 clearance fit of cantilever, so the front handlebar 206 and rear handle 202 of handle 21 can Easily to be closed up and be opened, meet the needs for the tissue removed and sheared when finger gripping is enforced the law.And when operation Doctor, which is enforced the law using the right hand by finger gripping, to be switched palm grip method and carries out pulling organ or tissue energetically and when realizing occlusion, at this moment It just needs surgical instrument 20 being switched to effective model by invalid mode.The palm of surgeon is adjacent to the scissors-type hand The side of handle 21, thumb pin scissorstype handle 21 rear handle 202 is clamped in palm to side, and formation one is U-shaped Clamping.Since the clamping of palm stops, index finger is unable to control the first button 237 of switching state in the region A1, and at this time just Good thumb press is in the region A1-1, it is possible to carry out the second button 237a of convenient promotion by thumb and distally proximally push away Dynamic movement, the second button 237a drive button block 203 to move along the first sliding groove 297 and second sliding slot 267.It is described to press 203 limited block 233 of button block interacts with first cam surface 251, drives the trigger 205 around trigger shaft 269 Rotation counterclockwise, in the process, the trigger 205 does resetting movement, second cam under the action of elastic element 250 With the trigger 205, rotation drives the second sheet body 283 and drives the first sheet body 281 of the locking plate along up time counterclockwise in face 255 Needle spinning reduction, first sheet body 281 and anodontia 226 inclination contact of cantilever, the locking plate spring 204 drive the lock Piece 208 is allowed to be pressed into contact with anodontia 226 tight fit of cantilever, the first lockhole wall 285 with cantilever inner wall 229, the second lockhole Wall 286 is pressed into contact with cantilever outer wall 228, and the anodontia cantilever 226 is rotated around arm pivot post 261,202 direction of handle after permission Front handlebar 206 closes up and handle 202 is opened away from front handlebar 206 after limiting.At this point, operative doctor can pass through the locking plate 208 are allowed to realize 23 snap-lock of working head with the pressing friction of anodontia cantilever 226, avoid clamping for a long time and firmly cause The fatigue of palm.It should be appreciated by those skilled in the art mutually switch over, nothing between above-mentioned effective model and invalid mode By being to be enforced the law using finger gripping or when palm grip method, singlehanded can freely be operated.In the above operating process, rear handle 202 When closing up with front handlebar 206, the cantilever 226 can penetrate the perforative through-hole of front handlebar 206 and enter the blind cavity configuration 207 In；Cantilever 226 can be accommodated and whenever not interfered just by the blind cavity configuration 207, be avoided in front handlebar 206 The empty avoiding region of protrusion is above additionally set to accommodate cantilever 226.

In addition, the operative doctor when lefthanded is completed mutually to switch between above-mentioned effective model and invalid mode When operation, whole operation process is similar, difference mainly the right hand carry out finger gripping enforce the law when, what index finger was stirred be first by Button 237, when using palm grip method, that thumb is stirred is the second button 237a；And left hand carries out finger gripping when enforcing the law, index finger is dialled That dynamic is the second button 237a, and when using palm grip method, what thumb was stirred is the first button 237.Those skilled in the art It should be understood that on the one hand can be made by the way that the first button 237 and the second button 237a is arranged in the region A1 of handle 21 and A1-1 Operative doctor is in different surgical environments, for example needs to be rapidly performed by the strip operation or prolonged of closure and opening Organ operation etc. is pulled, can easily carry out mutually switching between effective model and invalid mode using the same hand, be not required to Want an other hand carry out cooperation or other people carry out cooperation complete operation；On the other hand either right-handed or a left side are also met The operative doctor that is operated of hand habit can a hand realize the mutual switching of effective model and invalid mode.

As Fig. 5, Figure 14 and Figure 19-22 it is careful depict latch mechanism 24 under effective model, lock function and unlock function Switching between energy.The first button 237 or the second button 237a for first confiring that handle 21 are in proximal location, i.e. surgical instrument 20 under effective model.As shown in figures 15-16, it when needing to carry out pulling organ energetically for a long time, is used with operative doctor It is sketched for palm grip method.The palm of surgeon is adjacent to the side of the scissorstype handle 21, and thumb is pressed Firmly rear handle 202 is clamped in palm side by scissorstype handle 21, forms a U-shaped clamping, rear 202 conduct of handle Fixed handle, little finger of toe press on the support arm 264 of the front handlebar 206, and the third finger passes through the preceding finger loop 262, Middle finger is attached to the upper side position of the preceding finger loop 262, and by middle finger, nameless and little finger of toe is exerted oneself together, drives front handlebar 206 Closing up for handle 21 is realized in rotation, and then realizes working head 23 and closure clamping.In the process, front handlebar 206 is by distal end Clockwise rotary motion is proximally done, the rear handle 202 does rotary motion counterclockwise relative to front handlebar 206, described Anodontia cantilever 226 is rotated around arm pivot post 261, and first sheet body 281 does counterclockwise movement by promotion, and the second sheet body 283 pushes away Dynamic pressure contracting locking plate spring 204, the first lockhole wall 285 is contacted with cantilever inner wall 229 at this time, the second lockhole wall 286 and cantilever Outer wall 228 contacts, but handle 202 closes up towards front handlebar 206 after not influencing, and the cantilever 226 runs through the through-hole of front handlebar 206 It enters in the blind cavity configuration 207 of trigger 205, the cantilever distal end 227 is not interfered by the blind cavity configuration 207 of trigger 205.Once Stop closing movement, since the compressed reaction force of the locking plate spring 204 drives the locking plate 208 to be allowed to and anodontia cantilever 226 tight fits, first sheet body 281 and anodontia 226 inclination contact of cantilever, the first lockhole wall 285 in cantilever Wall 229 is pressed into contact with, and the second lockhole wall 286 is pressed into contact with cantilever outer wall 228, and handle 202 is opened away from front handlebar 206 after limitation It opens.At this point, operative doctor can be allowed to realize working head with the pressing friction of anodontia cantilever 226 by the locking plate 208 23 snap-locks avoid clamping the fatigue for firmly causing palm for a long time.

As shown in Figure 14 and Figure 21-22, when needing to unlock operation, by operative doctor using for palm grip method into Row summary.The palm of surgeon is adjacent to the side of the scissorstype handle 21, and thumb pins scissorstype handle 21 Rear handle 202 is clamped in palm by side, forms a U-shaped clamping, rear handle 202 is used as fixed handle, and little finger of toe is pressed It is pressed on the support arm 264 of the front handlebar 206, the third finger passes through the preceding finger loop 262, and middle finger is attached to the remote holder Refer to the upper side position of circle 262, finger buckle 259 described in outer power drive is applied by index finger pressing first and is rotated clockwise, institute is driven It states the second cam surface 255 to rotate with the trigger 205, the second cam surface 255 of the trigger 205 is with 205 up time of trigger Second sheet body 283 of needle rotation forces locking plate 208 tilts and the lockhole along rotation counterclockwise, the rotation of the first sheet body 281 284 with anodontia 226 clearance fit of cantilever.Second sheet body 283 pushes compression locking plate spring 204, at this time first lockhole Wall 285 is not contacted with cantilever inner wall 229, and the second lockhole wall 286 is not also contacted with cantilever outer wall 228, and handle 202 deviates from after permission Front handlebar 206 opens, as unlocking function.In the case where keeping index finger to press 205 state of trigger, the handle 202 and preceding Hand 206 can freely be closed up and opening operation.When index finger unclamps the finger buckle 259, the trigger 205 is in elasticity It automatically resets under the action of element 250, second cam surface 255 is separated with the second sheet body 283, and the locking plate 208 is in locking plate It automatically resets under the rebound effect of spring 204, the locking plate 208 is allowed to the compression with anodontia cantilever 226.

It should be appreciated by those skilled in the art the utility model realizes surgical device using anodontia cantilever 226 and locking plate 208 The unlocking function and lock function of tool 20 may be implemented the locking of any position, meet chucking power during handle 21 closes up The clamping requirement for conforming exactly to different operations and different tissues organ site, realizes electrodeless variation, overcomes lock bring disadvantage with teeth End, allows surgical instrument 20 to keep suitable chucking power position and clamping force.

If Figure 23-24 depicts another embodiment, surgical instrument 30 is roughly the same with surgical instrument 20, primarily directed to Anodontia cantilever 226 and locking plate 208 of the latch mechanism 24 for locking are replaced, and are cooperated using cantilever 326 with teeth and locking bolt 308 Realize lock function and unlocking function.

The surgical instrument 30 include comprising distal end working head 23, proximal end scissorstype handle 31 and extend therebetween plus Long bar portion 22；The handle 31 includes front handlebar 206, rear handle 202 and the arm pivot post 261 for connecting it, and the front handlebar 206 and rear handle 202 can rotate relative to the arm pivot post 261.The handle 31 includes latch mechanism 34, the lock Mechanism 34 and latch mechanism 24 all include effective model and invalid mode, and the two switching mode is identical, is not repeated herein.The lock Mechanism 34 includes realizing locking from cantilever 326 made of the extension of rear handle 202 and the cooperation of locking bolt 308.The cantilever 326 includes more A sawtooth 327, and the locking bolt 308 includes the lock tooth 381 to match with the sawtooth 327；When the latch mechanism 34 is effective When mode, the elastic element 250 drives the locking bolt 308 that the lock tooth 381 and the sawtooth 327 are mutually twisted, and permits Perhaps handle 202 closes up towards front handlebar 206 after and handle is away from the opening of front handlebar 206, as lock function after limiting；It is described to pull 255 property of can choose of the second cam surface of machine 205 is contacted with the locking bolt 308, and applying finger buckle 259 described in outer power drive makes The trigger 205 is obtained to rotate around trigger shaft 269, and the second cam surface 255 drives the locking bolt 308 to move, and makes the lock Tooth 381 and sawtooth 327 are mutually disengaged, and handle is opened away from front handlebar 206 after permission, as unlocking function.In the process, institute The hollow blind cavity configuration 207 of trigger 205 is stated, the cantilever 326 under closed configuration can be accommodated, be avoided in front handlebar 206 just The empty avoiding region of protrusion is above additionally set to accommodate cantilever 326, effectively simplifies the components of front handlebar 206, makes front handlebar 206 is more succinct, simultaneously because being not provided with the limitation in empty avoiding region, the trigger 205 be can be set in the region A2, before described The shape of handle 206 can preferably match the firmly situation of finger, avoid exerting oneself for the empty avoiding region blocks finger of protrusion.

The many different embodiments and example of the utility model are had shown and described.One of this field is common Technical staff, under the premise of not departing from the scope of the utility model, by it is suitably modified the method and instrument can be made it is suitable Answering property is improved.Several kinds of amendment schemes are referred, and for those skilled in the art, other amendment schemes are also can With what is expected.Therefore the scope of the utility model should according to accessory claim, while be understood not to by specification and The particular content of the structure that attached drawing shows and records, material or behavior is limited.

Claims (9)

1. a kind of surgical instrument containing hollow trigger includes distal end working head, proximal handle and the extension bar extended therebetween Portion；The handle includes front handlebar, rear handle and the arm pivot post for connecting it, and the front handlebar and rear handle can be relative to institutes Arm pivot post is stated to rotate；The working head includes a pair of of binding clip and the driving mechanism being attached thereto；The extension bar Portion includes runner, outer bar portion and draw-in bar, and the outer bar portion and runner are fixed together and are mounted in front handlebar, the interior drawing Bar one end is connect with the driving mechanism and its other end is connect with rear handle, which is characterized in that

1) handle also includes latch mechanism；

2) latch mechanism includes the cantilever being linked together with rear handle, and the latch mechanism also includes trigger；

3) trigger is mounted in the front handlebar and its partial denudation is in the outside of front handlebar, and the trigger turns comprising trigger The blind cavity configuration of axis and a side opening；

4) after the rear handle closes up towards the front handlebar, the cantilever can penetrate the through-hole of front handlebar and enter the blind chamber In structure；The trigger can be rotated around the trigger shaft, and the shape and size of the blind cavity configuration meet: be pulled when described Do not interfere with the cantilever when machine rotates, while the cantilever distal end of the cantilever is not exposed except front handlebar and trigger.

2. the surgical instrument as described in claim 1, which is characterized in that the latch mechanism also includes locking plate, button and elasticity Element；The latch mechanism includes effective model and invalid mode；The locking plate includes to match with the cantilever shape and size Lockhole, the cantilever penetrates the lockhole；The trigger also includes the first cam surface, the second cam surface and finger buckle, described Button and first cam surface interact, and the trigger is driven to rotate around trigger shaft, realize latch mechanism in effective mould Switch between formula and invalid mode.

3. the surgical instrument as described in claim 2, which is characterized in that when the latch mechanism is effective model, the bullet Property element drive the locking plate be allowed to anodontia cantilever tight fit, after permission handle close up towards front handlebar and the back of the hand after limiting It is opened from front handlebar, as lock function；The second cam surface property of can choose is contacted with the locking plate, is applied external force and is driven Moving the finger buckle rotates the trigger around trigger shaft, and the second cam surface drives locking plate movement, be allowed to Anodontia cantilever clearance fit, handle is opened away from front handlebar after permission, as unlocking function.

4. the surgical instrument as described in claim 3, which is characterized in that the button includes the first button and the second button, First button and the second button are separately mounted to two sides of the front handlebar；The front handlebar includes to run through two The long and narrow sliding slot of side, first button and the second button can slide in the long and narrow sliding slot；The side of the long and narrow sliding slot To being basically parallel to the lengthening bar portion.

5. the surgical instrument as described in claim 4, which is characterized in that the rear side of runner is arranged in the long and narrow sliding slot, and Meet following require: left or right hand is enforced the law using finger gripping when operating the handle, what the index finger of the hand of operation can be convenient Stir one of button；When left or right hand operates the handle using palm grip method, the thumb of the hand of operation can be square Just stir one of button.

6. the surgical instrument as described in claim 1, which is characterized in that the latch mechanism also includes locking bolt, button and elasticity Element；The latch mechanism includes effective model and invalid mode；The cantilever includes multiple sawtooth, and the locking bolt includes and institute State the lock tooth that sawtooth matches；The trigger also includes the first cam surface, the second cam surface and finger buckle, the button with it is described The interaction of first cam surface, drives the trigger to rotate around trigger shaft, realizes latch mechanism in effective model and invalid mould Switch between formula.

7. the surgical instrument as described in claim 6, which is characterized in that when the latch mechanism is effective model, the bullet Property element drive the locking bolt that the lock tooth and the sawtooth are mutually twisted, handle closes up towards front handlebar and is limited after permission Handle is opened away from front handlebar after system, as lock function；The second cam surface property of can choose is contacted with the locking bolt, Applying finger buckle described in outer power drive rotates the trigger around trigger shaft, and the second cam surface drives the locking bolt fortune It is dynamic, it is mutually disengaged the lock tooth and sawtooth, handle is opened away from front handlebar after permission, as unlocking function.

8. the surgical instrument as described in claim 7, which is characterized in that the button includes the first button and the second button, First button and the second button are separately mounted to two sides of the front handlebar；The front handlebar includes to run through two The long and narrow sliding slot of side, first button and the second button can slide in the long and narrow sliding slot；The side of the long and narrow sliding slot To being basically parallel to the lengthening bar portion.

9. the surgical instrument as described in claim 8, which is characterized in that the rear side of runner is arranged in the long and narrow sliding slot, and Meet following require: left or right hand is enforced the law using finger gripping when operating the handle, what the index finger of the hand of operation can be convenient Stir one of button；When left or right hand operates the handle using palm grip method, the thumb of the hand of operation can be square Just stir one of button.