CN208876618U - A kind of surgical instrument containing novel latch mechanism - Google Patents

Abstract

The utility model discloses a kind of surgical instruments containing novel latch mechanism, 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 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 is connect with the driving mechanism and its other end is connect with rear handle, the latch mechanism includes the circular arc cantilever being linked together with rear handle, the circular arc cantilever includes cantilever inner wall and the first side and second side that are attached thereto, multiple first lock teeth are raised from cantilever inner wall, the handle also includes latch mechanism, and the latch mechanism includes effective model and invalid mode.

Description

A kind of surgical instrument containing novel latch mechanism

Technical field

The utility model relates to Minimally Invasive Surgery instrument more particularly to a kind of surgical instruments containing novel latch mechanism.

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.

Relative to Tradtional laparotomy, main advantage is to reduce wound and mitigates ailing and accelerate extensive laparoscopic surgery It is multiple.The whole operation difficulty of endoscope-assistant surgery is larger, and the 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 frequently necessary to for a long time with difficult gesture operation instrument, and doctor is easy fatigue, very To induction arthritis, the risks such as scapulohumeral periarthritis.Laparoscope hand-held apparatus should meet Human Engineering Principle, support a variety of gripping hands Method reduces 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 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 novel lock machine The surgical instrument of structure includes 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, wherein the handle also includes latch mechanism, and the latch mechanism includes effective model And invalid mode；The latch mechanism includes the circular arc cantilever being linked together with rear handle, and the circular arc cantilever includes cantilever inner wall With the first side and second side being attached thereto, multiple first lock teeth are raised from cantilever inner wall, and the first side wall is by first Side extends outwardly and extended height is more than or equal to the first maximum tooth height for locking tooth；The latch mechanism also includes trigger, described to pull Machine includes trigger shaft, hammerlock, the first cam surface and finger buckle, and the hammerlock includes second to match with the first lock tooth Lock tooth；

The latch mechanism also includes the button and elastic element being mounted in front handlebar, wherein 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；When the latch mechanism is effective model, the elastic element drives the trigger to rotate around the trigger shaft, So that the first lock tooth and the second lock tooth are mutually twisted, after permission handle close up towards front handlebar and before handle deviates from after limiting Handle opens, as lock function；Applying finger buckle described in outer power drive rotates the hammerlock around trigger shaft, so that The second lock tooth and the first lock tooth disengage, and handle is opened away from front handlebar after permission, as unlocking function.

A kind of optional technical solution, wherein the circular arc cantilever also includes second sidewall, and the second sidewall is by second Side extends outwardly and extended height is more than or equal to the first maximum tooth height for locking tooth, when the circular arc cantilever is partly or entirely exposed Outside the front handlebar, in the projection view of the substantially vertical first side and/or second side, the first lock tooth It is not exposed.

A kind of optional technical solution, wherein the front handlebar further includes third side wall, and the third side wall is opened along cantilever Mouth extends outwardly, and the extended height of the third side wall is more than or equal to the height of the second lock tooth；And the circular arc cantilever It is partly or entirely exposed outside the front handlebar, in the projection view of the substantially vertical first side, first lock Tooth is not exposed.

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.

A kind of optional technical solution, wherein the front handlebar includes the long and narrow sliding slot through two side, and described the One button and the second button can slide in the long and narrow sliding slot.

A kind of optional technical solution, wherein 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.

A kind of optional technical solution, wherein the front handlebar includes the through slot through two side, and described first presses Button and the second button can rotate in the through slot.

A kind of optional technical solution, wherein the rear side of runner is arranged in the through slot, and meets following require: left hand Or the 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 stirs one of button； When left or right hand operates the handle using palm grip method, what the thumb of the hand of operation can be convenient stir one of them by 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. 9；

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 front handlebar schematic internal view shown in Figure 10；

Figure 15 is the schematic internal view of front handlebar lid shown in Fig. 10；

Figure 16 is the cut away view under the utility model invalid mode；

Figure 17 is 17-17 partial enlarged view shown in Figure 16；

Figure 18 is the cut away view of lock state under the utility model effective model；

Figure 19 is 19-19 partial enlarged view shown in Figure 18；

Figure 20 is the cut away view of the utility model unlocked state；

Figure 21 is 21-21 partial enlarged view shown in Figure 20；

Figure 22 is the exploded view of another embodiment of the utility model surgical instrument；

Figure 23 is the perspective view of trigger shown in Figure 22；

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 The arm pivot post 103 rotates；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 For realizing the locking and unlocking of 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 of the utility model embodiment is illustrated in detail in Fig. 4-21, includes distal end working head 23, closely End scissorstype handle 21 and the lengthening bar portion 22 extended therebetween；The handle 21 includes front handlebar 206, rear handle 202 and company Its arm pivot post 261 is connect, and the front handlebar 206 and rear handle 202 can make rotation fortune relative to the arm pivot post 261 It is dynamic；The arm pivot post 261 is living by front handlebar 206 and rear handle 202 with 206 integrated injection molding of front handlebar and by shaft hole 222 Dynamic connection.The arm pivot post 261 may be set to be independent part for being flexibly connected front handlebar 206 and rear handle 202.Institute Stating and lengthening bar portion 22 includes runner 214, outer bar portion 213 and draw-in bar 215, and the outer bar portion 213 and runner 214 are fixed together And be mounted in front handlebar 206, described 215 one end of draw-in bar is connect and its other end and rear handle with the driving mechanism 211 202 connect and are 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.It needs more It further points out, aforementioned " 224 center position length of thumb circle of arm pivot post 261 to rear handle 202 is D ", the specific number of D Value is not definite value, and numerical value changes in a lesser section.Test is carried out based on anthropometry and biomechanical principle to grind Studying carefully and counting acquisition optimal D value section 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 use laparoscopic surgical instruments (such as with The laparoscope grasping forceps series of CLICKline brand sale), will lock locking/unlocking trigger setting in the region A3 and by invalidating mould Formula switching push button is arranged in the region A2.This design need to usually carry out lock locking/unlocking switching with middle finger operating trigger, use middle finger Or index finger operation button carries out invalidating pattern switching, operates and switches uncomfortable.It is important to note that by trigger It is arranged and may cause inconvenience in the region A3.Most common problem mainly includes, when the instrument is in the lock state, operation Doctor's either finger gripping is enforced the law or palm grip method, when operation instrument (nipper) clamps organ or tissue and pulls mobile, Middle finger almost requires easily to touch trigger for assisting force under this state, lead to false triggering so that instrument unexpectedly from Lock state is switched to unlocked state, and organ or tissue is caused to slip, and causes clinical use inconvenient, or even induce malpractice.

As Figure 10-21 depicts the Nomenclature Composition and Structure of Complexes of latch mechanism 24.As shown in figs.10 and 14, the latch mechanism 24 includes Trigger 205, locking plate 208, the circular arc cantilever 204 being linked together with rear handle 202.The circular arc cantilever 204 includes from rear handle 202 cantilevers 241 outwardly protruded and cantilever distal end 247.The cantilever 241 is set as arc-shaped structure, including cantilever Inner wall 249, cantilever outer wall 248, first side 244 and second side 243, the shape of the cantilever inner wall 249 and cantilever outer wall 248 Shape is substantially that the center of circle extends the cantilever 241 into composition isocentric circular arc along arm pivot post 261 from 202 junction of handle.It is described Cantilever inner wall 249 includes that multiple first lock teeth 242 are raised from cantilever inner wall 249.The tooth form of the first lock tooth 242 is from cantilever Distally 247 backward handle 202 along cantilever inner wall 249 tilt extend.The first side wall 245 is extended outwardly and is prolonged by first side 244 The maximum tooth height that height is more than or equal to the first lock tooth 242 is stretched, the protection to the first lock tooth 242 is formed.Those skilled in the art It should be understood that need to make the movement radian of front and back handle larger to obtain good feel, and in this case, the lock of cantilever Tooth is easy to expose outside handle, and operative doctor finger or gloves is be easy to cause to scratch.By in the first side of setting of the first lock tooth 242 The unilateral protection to the first lock tooth 242 may be implemented in wall 245, while the first side wall 245 only is arranged in first side 244, can be with It is effective to simplify mold, circular arc cantilever 204 and rear handle 202 are subjected to injection molding as a part.The circular arc cantilever 204 materials include the plastic material that integrated injection molding is carried out with rear handle 202, are also possible to other semi-rigid or rigid materials very It is made to flexible material.The latch mechanism 24 also includes button assembly 25 and elastic element 250, the trigger 205, elasticity member Part 250 and button assembly 25 are installed along in the front handlebar 206.The elastic element 250 drives trigger 205 pressing After carry out realization reset.The trigger 205 controls the first lock tooth 242 of circular arc cantilever 204 and the second lock tooth 256 of trigger 205 Locking and unlocking are realized in cooperation.

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 248 and the trigger shaft connecting with front handlebar 206 269, the first cam surface 251, hammerlock 255 and finger buckle 259.The trigger 205 includes the trigger substantially in the arc of crescent shape Body 254, 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. The hammerlock 255 is extended outward to form by 254 middle position of trigger body, 255 connection position of the trigger body 254 and the hammerlock Trigger shaft hole 248 is installed, the 248 adjacent locations providing holes 247 of trigger shaft hole is used for elastic elements 250.Institute Stating the first cam surface 251 includes cam curve section 253 and cam planarea 252, and the cam curve section 253 also can be set For stepped straightway or continuous oblique line section.First lock tooth 242 of 255 bottom side of the hammerlock setting and circular arc cantilever 204 Second lock tooth 256 of matching occlusion.When promoting button component 25 is proximally mobile to distal end, the limit of the button assembly 25 Block 233 and the cam curve section 253 and cam planarea 252 of the first cam surface 251 are engaged respectively, and then described in promotion The rotation of trigger 205 realizes that effective model switches to invalid mode.Trigger 205 is rotated around trigger shaft 269 while drive first is convex The second lock tooth 256 on wheel face 251 and hammerlock 255 does the rotary motion of the same direction.When the latch mechanism 24 is effective model When, the elastic element 250 drives the trigger 205 to rotate around the trigger shaft 269, so that the first lock tooth 242 It is mutually twisted with the second lock tooth 256, handle 202 closes up towards front handlebar 206 after permission and handle 202 is away from preceding after limiting Hand opens, as lock function；Applying finger buckle 259 described in outer power drive makes the circular arc hammerlock 204 around trigger shaft 259 rotations, so that the second lock tooth 256 is kept completely separate with the first lock tooth 242, handle 202 is opened away from front handlebar 206 after permission It opens, as unlocking function.

The front handlebar 206 for installing fixed latch mechanism 24 is depicted as shown in Fig. 5, Figure 10 and Figure 14-15.The front handlebar 206 further include front handlebar lid 209 engaged therewith.The front handlebar 206 removes preceding 262 part of finger loop, with front handlebar lid 209 It is substantially 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 First sliding groove 297 and second sliding slot 267, the first sliding groove 297 and second sliding slot 267 limit the button sliding block 203 along cunning Slot 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, described long and narrow The direction of sliding slot is basically parallel to the lengthening bar portion 22, and it should be appreciated by those skilled in the art 297 Hes of first sliding groove Second sliding slot 267 may be set to be arc chute.As it was noted above, index finger is at the region A1 and the region A2, at finger In bending state, it is possible to pressing or pushing action are comfortably carried out, and index finger is pushed using arc and is not so good as straight line in experience The promotion in direction is comfortable.Therefore it is not so good as using the operating experience of arc chute narrow using the linear type for being roughly parallel to bar portion direction Long sliding 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.In the region A1 and the region A2, the front handlebar lid 209 and arm pivot post 261 and pull Fixed column 291 (299) are arranged in 269 corresponding position of machine shaft.A kind of optional technical solution, the trigger shaft 269 and trigger 205 trigger shaft hole 269 is arranged to an entirety, and trigger 205 includes trigger shaft 269, the front handlebar lid 209 with preceding Shaft hole is arranged in 206 corresponding position of hand.The region A2 and its symmetrical region, the front handlebar lid 209 are arranged with the front handlebar 206 Trigger slot 298 (268) accommodates and limits trigger 205 and makes rotating motion.In the substantially region B1 and its symmetrical region, the front handlebar 206 also include the runner mounting groove 265 of remote location, and the front handlebar lid 209 includes runner mounting groove 295.The runner peace Tankage 265 (295) limits runner together and makes rotating motion in slot.The front handlebar 206 and front handlebar lid 209 further include accommodating The cantilever groove 263 (293) that 202 circular arc cantilever 204 of handle passes through afterwards, the cantilever groove 263 (293) form complete cantilever and open Mouthful, the cantilever opening size is greater than 204 outer dimension of circular arc cantilever, and circular arc cantilever 204 rotates Shi Buyu around arm pivot post Cantilever groove 263 (293) contact.The cantilever groove 293 of the front handlebar lid 209 extends third side wall along cantilever outward opening 293, and the extended height of the third side wall 293 is more than or equal to the height of the second lock tooth 256；The second lock tooth 256 Height refer to 256 height of the second lock tooth when the first lock tooth 242 and the second lock tooth 256 are in occlusion.The circular arc cantilever 204 It is partly or entirely exposed at 206 outside of front handlebar, in the projection view of the substantially vertical first side, described the One lock tooth 242 is not exposed.The third side wall 293 is used for the masking when the front handlebar 206 and the completion opening of rear handle 202 First lock tooth 242 of circular arc cantilever 204, avoids that operative doctor finger or gloves is caused to scratch after the first lock tooth 242 is exposed.It is a kind of 264 (not shown) of the 4th side wall is arranged with 293 corresponding position of third side wall in the front handlebar 206 in optional technical solution, The first side wall 245 for cancelling the circular arc cantilever 204 changes to be replaced protecting the first lock tooth 242 by the 4th side wall 264.Ability Field technique personnel are it should be understood that cancel the first side wall 245 and third side wall 293, and second sidewall is arranged in circular arc cantilever 204 245a is replaced with the 4th side wall 264 of setting on the front handlebar 206, can also play identical technical effect, and this The range of utility model protection.

As Fig. 5, Figure 15 and the careful latch mechanism 24 that depicts of Figure 17-18 switch between effective model and invalid mode. When finger gripping is enforced the law, for the right hand operation of operative doctor, the third finger passes through the preceding finger loop 262, before middle finger is attached to The region A3 of the upside of finger loop 262, index finger can flexibly control the region A1, the region A2 or the region B1.Work as surgical instrument 20 when needing to be rapidly performed by closure and opening operation, typically such as at this moment just needs when operation on gallbladder carries out blood vessel exfoliation Surgical instrument 20 is switched to invalid mode by effective model.The index finger is in the region A1 by along proximate promoting button First button 237 of component 25 is mobile, and first button 237 drives button block 203 sliding along the first sliding groove 297 and second Slot 267 is mobile.203 limited block 233 of button block interacts with first cam surface 251, drives the trigger 205 It is rotated clockwise around trigger shaft 269, in the process, the hammerlock 255 of the trigger 205 rotates clockwise, and hammerlock 255 revolves Turn to tilt, the second lock tooth 256 is separated with the first lock tooth 242.When limited block 233 is moved to first cam surface 251 Cam planarea 252 when, the trigger 205 forms self-locking with the button block 203, and the elastic element 250 is not capable of resetting. Latch mechanism 24 is switched to invalid mode by effective model at this time, it should be appreciated by those skilled in the art, under invalid mode, by It is in discrete state always in the second lock tooth 256 and the first lock tooth 242, so the front handlebar 206 and rear handle of handle 21 202 can be convenient closed up and opened, meet the needs for the tissue removed and sheared when finger gripping is enforced the law.Work as institute It states the first side wall 244 and locks tooth 242 for first together with the third side wall 292 when the first lock tooth 242 is beyond front handlebar 206 It blocks, avoids the first lock tooth 242 from exposing, the finger of operative doctor or gloves is avoided to be scratched.

And it is enforced the law using the right hand by finger gripping when operative doctor and switches palm grip method and pulled organ or tissue energetically And when realizing occlusion locking, at this moment just need surgical instrument 20 being switched to effective model by invalid mode.Surgeon Palm be adjacent to the side of the handle 21, what thumb pinned scissorstype handle 21 is clamped in hand for rear handle 202 to side In the palm, a U-shaped clamping is formed.Since the clamping of palm stops, index finger is unable to control first of switching state in the region A1 Button 237, and at this time just thumb press in the region A1-1, it is possible to pass through thumb and carry out convenient pushing the second button 237a distally proximally pushes movement, and the second button 237a drives button block 203 along the first sliding groove 297 and the Two sliding slots 267 are mobile.203 limited block 233 of button block interacts with first cam surface 251, pulls described in driving Machine 205 rotates counterclockwise around trigger shaft 269, and in the process, the trigger 205 is done under the action of elastic element 250 Resetting movement, so that the first lock tooth 242 and the second lock tooth 256 are mutually twisted, the circular arc cantilever 204 is around arm pivot post 261 rotations, handle 202 closes up towards front handlebar 206 after permission and handle 202 is away from the opening of front handlebar 206 after limiting.At this point, Operative doctor can be mutually twisted by the first lock tooth 242 and the second lock tooth 256 and realize 23 snap-lock of working head, It avoids clamping the fatigue for firmly causing palm for a long time.It should be appreciated by those skilled in the art above-mentioned effective model and nothings It mutually switches between effect mode, either enforced the law using finger gripping or when palm grip method, singlehanded can freely operate.

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 13 and Figure 18-21 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 figs. 14-15, 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 handle 21, and thumb pins scissors Rear handle 202 is clamped in palm side by type handle 21, forms a U-shaped clamping, rear handle 202 is as fixation 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 It is attached to the upper side position of the preceding finger loop 262, by middle finger, nameless and little finger of toe is exerted oneself together, and driving front handlebar 206 rotates It realizes closing up for handle 21, and then realizes working head 23 and closure clamping.In the process, front handlebar 206 is from distal end to close Clockwise rotary motion is done at end, and the rear handle 202 does rotary motion counterclockwise, the circular arc relative to front handlebar 206 Cantilever 204 drives the first lock tooth 242 along the first lock tooth 242 and the second lock 256 detaching direction of tooth around the rotation of arm pivot post 261 Sliding.Often close up complete first lock, 242 distance of tooth, the second lock tooth 256 of trigger 205 is in the circular arc cantilever 204 First lock tooth 242 squeezes to be rotated clockwise under driving, 250 mild compression of elastic element, when the first lock tooth 242 crosses the Two lock 256 moments of tooth, 250 Rapid reset of elastic element, trigger rotate counterclockwise, and the first lock tooth 242 and the second lock tooth 256 restore Occlusion, therefore during handle 202 and front handlebar 206 close up, the first lock tooth 242 and the second lock tooth 256 are separated by tooth Occlusion.Once stopping closing movement, due to the first lock tooth 242 of the elastic element 250 compressed reaction force driving and the Two lock teeth 256 are engaged, and handle 202 is opened away from front handlebar 206 after limitation, 23 snap-lock of working head is realized, when avoiding long Between clamping firmly cause the fatigue of palm.

As shown in Figure 13 and Figure 20-21, 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 handle 21, thumb pin scissorstype handle 21 to side Rear handle 202 is clamped in palm, a U-shaped clamping is formed, rear handle 202 is used as fixed handle, and little finger of toe is pressed in institute It states on the support arm 264 of front handlebar 206, the third finger passes through the preceding finger loop 262, and middle finger is attached to the preceding finger loop 262 upper side position applies finger buckle 259 described in outer power drive by index finger pressing first and rotates clockwise, the finger buckle 259 rotate the hammerlock 255 around trigger shaft 259, so that the second lock tooth 256 and the first lock tooth 242 are completely de- It opens, handle 202 is opened away from front handlebar 206 after permission, as unlocking function.Index finger is being kept to press 205 state of trigger Under, the handle 202 and front handlebar 206 can freely be closed up and opening operation.When index finger unclamps the finger buckle 259 When, the trigger 205 automatically resets under the action of elastic element 250, and the second lock tooth 242 is engaged with the first lock tooth 225, at this time Lock function is become from unlocking function.

If Figure 22-23 depicts another embodiment, surgical instrument 30 is roughly the same with surgical instrument 20, primarily directed to Latch mechanism 24 is on the basis of the first side wall 245 of circular arc cantilever 204 blocks the first lock tooth 242, using the circular arc cantilever of double side wall 304 and the cooperation of trigger 305 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 306, rear handle 202 and the arm pivot post 261 for connecting it, and the front handlebar 306 and rear handle 202 can rotate relative to the arm pivot post 261, the front handlebar 306 and the front handlebar 206 It is essentially identical, eliminate third side wall 292.The handle 31 includes latch mechanism 34, and the latch mechanism 34 and latch mechanism 24 all wrap Containing effective model and invalid mode, the two switching mode is identical, is not repeated herein.The latch mechanism 34 includes from rear handle Locking is realized in circular arc cantilever 304 made of 202 extensions and the cooperation of trigger 305.The circular arc cantilever 304 includes from rear handle 202 Cantilever 341 and the cantilever distal end 347 outwardly protruded.The cantilever 341 is set as arc-shaped structure, including cantilever inner wall 349, cantilever outer wall 348, first side 344 and second side 343, the shape of the cantilever inner wall 349 and cantilever outer wall 348 It is substantially that the center of circle extends the cantilever 341 into composition isocentric circular arc along arm pivot post 261 from 202 junction of handle.It is described outstanding Arm inner wall 349 includes that multiple first lock, 342 (not shown) of tooth are raised from cantilever inner wall 349.The tooth form of the first lock tooth 342 From cantilever distal end 347 backward handle 202 along cantilever inner wall 349 tilt extend.The first side wall 345 is from first side 344 to extension It stretches and extended height is more than or equal to the first maximum tooth height for locking tooth 342.The circular arc cantilever 304 also comprising second sidewall 346 by Second side 343 extends outwardly and extended height be more than or equal to the first lock tooth 342 maximum tooth it is high, in front handlebar 306 and handle afterwards During hand 202 opens or closes up, the circular arc cantilever 204 is partly or entirely exposed at 306 outside of front handlebar, big In the projection view for causing the vertical first side 344 and/or second side 343, the first lock tooth 342 is not exposed.Such as figure Shown in 20, the trigger 305 is roughly the same with trigger 205, and only the hammerlock 355 and the hammerlock 255 are different.The lock Arm 355 is extended outward to form by 254 middle position of trigger body, and 355 bottom side of hammerlock outwardly protrudes hammerlock body 350, described Hammerlock body 350 outwardly protrudes setting and matches the second lock tooth 356 being engaged with the first lock tooth 342 of circular arc cantilever 304.The lock The width of arm body 350 is less than the first side wall 345 and arrives the distance between second sidewall 346, in front handlebar 306 and rear handle 202 open or whenever close up process, the hammerlock body 350 and the second lock tooth 356 and the first side wall 345 to the Two sidewall 34s 6 do not contact.When the latch mechanism 34 is effective model, the elastic element 250 drives the trigger 205 to surround The trigger shaft 269 rotates, so that the first lock tooth 342 and the second lock tooth 356 are mutually twisted, 202 court of handle after permission Close up to front handlebar 306 and handle 202 is opened away from front handlebar after limiting, as lock function；Apply hand described in outer power drive Refer to that button 259 rotates the circular arc hammerlock 204 around trigger shaft 259, so that the second lock tooth 356 and the first lock tooth 342 are kept completely separate, and handle 202 is opened away from front handlebar 306 after permission, as unlocking function.

It should be appreciated by those skilled in the art need to make the movement radian of front and back handle to obtain good feel Larger, the first side wall 345 described in the utility model to second sidewall 346 covers the first lock tooth 342, avoids operation doctor Green hand refers to or gloves scratch.

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 novel latch mechanism includes distal end working head, proximal handle and the lengthening extended therebetween Bar 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 The arm pivot post rotates；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, and the outer bar portion and runner are fixed together and are mounted in front handlebar, described interior Pull rod 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, and the latch mechanism includes effective model and invalid mode；

2) latch mechanism includes the circular arc cantilever being linked together with rear handle, and the circular arc cantilever is comprising cantilever inner wall and therewith Connected first side and second side, multiple first locks teeth are raised from cantilever inner wall, and the first side wall from first side to The maximum tooth that outer extension and extended height are more than or equal to the first lock tooth is high；

3) latch mechanism also includes trigger, and the trigger includes trigger shaft, hammerlock, the first cam surface and finger buckle, described Hammerlock includes the second lock tooth to match with the first lock tooth；

4) latch mechanism also includes the button and elastic element being mounted in front handlebar, wherein the button and described first convex Wheel face interaction, drives the trigger to rotate around trigger shaft, realizes latch mechanism between effective model and invalid mode Switching；

5) when the latch mechanism is effective model, the elastic element drives the trigger to rotate around the trigger shaft, So that the first lock tooth and the second lock tooth are mutually twisted, after permission handle close up towards front handlebar and before handle deviates from after limiting Handle opens, as lock function；Applying finger buckle described in outer power drive rotates the hammerlock around trigger shaft, so that The second lock tooth and the first lock tooth disengage, and handle is opened away from front handlebar after permission, as unlocking function.

2. surgical instrument as described in claim 1, it is characterised in that the circular arc cantilever also includes second sidewall, and described second Side wall is extended outwardly by second side and extended height is more than or equal to the first maximum tooth height for locking tooth, when circular arc cantilever part Or it is all exposed outside the front handlebar, in the projection view of the substantially vertical first side and/or second side, institute It is not exposed to state the first lock tooth.

3. surgical instrument as described in claim 1, which is characterized in that the front handlebar further includes third side wall, the third Side wall extends along cantilever outward opening, and the extended height of the third side wall is more than or equal to the height of the second lock tooth；And The circular arc cantilever is partly or entirely exposed outside the front handlebar, in the projection view of the substantially vertical first side In, the first lock tooth is not exposed.

4. surgical instrument as claimed in claim 2 or 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.

5. surgical instrument as claimed in claim 4, which is characterized in that the front handlebar includes through the long and narrow of two side Sliding slot, first button and the second button can slide in the long and narrow sliding slot.

6. surgical instrument as claimed in claim 5, which is characterized in that the direction of the long and narrow sliding slot is basically parallel to described add Long bar portion.

7. surgical instrument as claimed in claim 6, which is characterized in that the rear side of runner is arranged in the long and narrow sliding slot, and full Foot is following to be required: left or right hand is enforced the law using finger gripping when operating the handle, group that the index finger of the hand of operation can be convenient Move one of button；When left or right hand operates the handle using palm grip method, the thumb of the hand of operation be can be convenient Stir one of button.

8. surgical instrument as claimed in claim 4, which is characterized in that the front handlebar includes through the logical of two side Slot, first button and the second button can rotate in the through slot.

9. surgical instrument as claimed in claim 8, which is characterized in that the rear side of runner is arranged in the through slot, and meets such as Lower requirement: left or right hand using finger gripping enforce the law operate the handle when, what the index finger of the hand of operation can be convenient stirs it In a button；When left or right hand operates the handle using palm grip method, what the thumb of the hand of operation can be convenient is dialled Move one of button.