A kind of articulated joint locking mechanism on surgical instrumentsTechnical field
The present invention relates to the articulated joint locking mechanism on a kind of surgical instruments, the joint on specially a kind of stapler is connectHead locking mechanism.
Background technique
It is known in the prior art, stapler as medically use substitution traditional-handwork suture equipment, userJust, tight, elastic suitable, especially its suture is quick, easy to operate and few side effects and the advantages that postoperative complication, and alsoSo that the tumor operation that can not be cut off in the past is able to lesion resection, very by the favor and high praise of domestic and international Clinical Surgery doctor.OutsideSection's stapler such as scope Endo-GIA may include that can be moved or be carried out joint motions relative to elongated shaft assemblyEnd effector.End effector, which is usually configured to, will need the tissue cut off to be fixed between clamping device, wherein clampingIt generally includes to be configured to the structure with nail bin is accommodated in device.Handle portion for operation is then configured to can controlThe closure of clamping device, and control push blade cutting and staple are pushed to be sutured.
But due to the limitation of abdominal cavity or chest cavity space, in surgical procedure, traditional linear cutting anastomat cannotEnough carry out angular adjustment, cannot effectively reach operative site clamped, be cross-section, anastomosed tissue, so gradually developingThe hysteroscope stapler that stapler actuator can turn, and widely used.
Such as Ethicon Endo Surgery Inc of the U.S. (ETHICON ENDO-SURGERY) is to the patent of its request for product, applicationIt number is CN200910130759.0, surgical instruments may include axis, end effector and connector, wherein the end effector can be withIt is moved around the connector relative to the axis.It proposes in that patent, referring to attached drawing 1, the joint of pervious end effector is transportedDynamic connector includes locking component, such as locking component 299, and the locking component 299 may include the outer circumferential direction from locking componentThe tooth 298 to extend out outside.Therefore, when making shaft assembly of the end effector relative to surgical instruments carry out joint motions, tooth298 can tangle or impact the soft tissue of surrounding, and may cause wound.In different situations, tissue capture may be existedBetween adjacent teeth 298, so that soft tissue may be pulled in actuated articulation joints simultaneously when end effector carries out joint motionsAnd it may be jammed by the relative motion part of connector.In embodiments of the present invention, wherein the tooth of locking component isHave angled or inclined, soft tissue, which can easily flow out and be reduced from tooth, pulls joint motions for soft tissueA possibility that in connector.Although reducing the damage of tissue to the improvement of tooth form, but there is a possibility that damage, therefore shouldPatent still uses cover structure as protection, and cover may be coupled at least one of the end effector and axis, andThe soft tissue adjacent to connector positioning is dragged into connector and/or by joint-clamping in order to prevent, and cover is configured at least portionDivide and surrounds connector.
Although the setting of cover solves the technical issues of locking component injury tissue, the presence of cover increases partQuantity, assembling process is comparatively laborious, and covers on during transluminal operation in the presence of the risk fallen.Therefore, it is necessary to a kind of improvementThe joint structure of type, so that joint motions will not generate damage to tissue in the case where not needing using cover.
Summary of the invention
The present invention provides a kind of surgical operating instrument, specially a kind of stapler with modified joint locking component.The present invention improves the joint structure between stapler end effector and elongated shaft, is replaced using the method for frictional connectionIt is connected for conventionally employed tooth and carries out joint locking, to solve in the operating process of end effector angular adjustment, soft groupIt knits and is easy the technical issues of being damaged by the tooth on joint, and the technical effect for more fine-tuning angle can be reached.
The technical proposal of the invention is realized in this way：
A kind of articulated joint locking mechanism on surgical instruments, the surgical instruments ball and socket joint specially on stapler lock machineStructure, including：End effector, elongated shaft and Handleset；
End effector may include anvil block and nail bin groupware, and surgical instruments further includes closed system and trigger system, closureSystem is configured to generate closed action, and including the close handles in Handleset, close handles can control anvil block oppositeRotation generates closed action, to clamp tissue, trigger system then includes firing handle, can be made by firing handle operationBlade be pushed forward in nail bin staple release, to carry out cutting suture to tissue.Closed system and trigger systemDrive connection part is all disposed in elongated shaft, i.e., elongated shaft is as transmission mechanism receiving portion between end effector and HandlesetPoint.
Its end effector can be pivotly connected with elongated shaft by articulated joint.Articulated joint is arranged so thatEnd effector carries out joint motions around book shaft opposite elongate axis, so that operator can carry out end effectorJoint motions are adjusted to suitable angle, to be easy access to the surgical site of patient's body.
In order to enable relatively fixed after adjusting end effector angle, articulated joint is equipped with locking mechanism；LockingEnd effector and the opposite locking of elongated shaft are realized in by mechanism:Locking mechanism includes locking disk and locking level, lockingDisk is relatively fixed with end effector, and locking level is located in elongated shaft, can be with elongated shaft relative motion, locking disk and locking level phaseThe side of contact is a curved surfaces, and the radian and locking disk curved surfaces for locking rod end surface match, and such setting makesObtaining locking level and locking panel surface can adequately contact, and locking level is connected with reset spring, act in the elastic force of reset springUnder, locking level is that bias offsets with locking disk in normal state, and locking level and locking panel surface are arranged to centainly thickThe frictional force of rugosity, the two generates enough torque, to prevent end effector and elongated shaft from relatively rotating.Wherein torque is bigSmall designed according to the torque of the surgical instruments external force that end effector may be subject in operation generation, it is therefore an objective toThe torque that frictional force generates is set as the torque greater than external force, to keep opposite locking.The setting of moment of friction depends on connecingThe biasing force for touching surface roughness and returning spring is typically provided to that the maximum moment that can be born in surgical procedure can be greater than, fromAnd prevent angle return after stress.In order to unlock, it is additionally provided with unlocking part, unlocking part is arranged outside elongated shaftAnd connect with locking level, when pulling unlocking part far from end effector direction, locking level can be driven to overcome returning springBiasing force moved so that locking level and locking disk relative separation, form unlocked state.
Further, in order to increase frictional force and protection part, locking level has been set as two parts composition, including as endFriction head and the connecting rod that is connect with friction head, the i.e. radian of friction head surface match with locking disk curved surfaces.ConnectionBar is made of rigid material, such as metal material or high rigidity plastics etc., ensure that the conduction of bonding strength and power；FrictionHead is then made of elastic material, such as the high molecular materials such as rubber, and surface is set as roughness with higher, described higherRoughness, be can obviously experience the biggish friction in surface for the instrument other component surface roughness, in addition,Elastic material such as rubber etc., itself has certain viscosity, further increases torque size.So that locking level and lockThe pressing of price fixing is more close, and the frictional force of generation is bigger.In the locked state, friction head is under the active force of returning springWith the contact of locking disc side and generation deformation
End effector can gyration there is certain range, the rotational angle of relatively primitive position is not under normal circumstancesIt can be more than 90 degree.When end effector turns to maximum angle, in order to guarantee to be in lockable state, rub head widthLess than or equal to locking disk width, and the contact surface of the end of locking level and locking disk is without departing from the curved surfaces of locking disk.
Above technical scheme is used, the invention has the advantages that：
(1) articulation locking mechanism replaces traditional tooth form to connect using frictional connection, solves in end effector angleIn the operating process of adjusting, soft tissue is easy the technical issues of being damaged by the tooth on joint.
(2) locking disk and locking level are contacted using cambered surface, the function of electrodeless adjustment are realized, so that angular adjustment is more smartReally.
Detailed description of the invention
Attached drawing 1 is actuated articulation joints structural schematic diagram in background technique；
Attached drawing 2 is overall appearance schematic diagram of the present invention；
Attached drawing 3 is the structural schematic diagram of articulation locking mechanism of the invention；
Attached drawing 4 is the top view of attached drawing 3；
Attached drawing 5 is the structural schematic diagram that joint angles convert posterior joint locking mechanism；
Attached drawing 6 is the top view of attached drawing 5
Specific embodiment
Corresponding appended drawing reference indicates corresponding component in the drawings.The present invention shows of the invention in one formPreferred embodiment, and such embodiment should be construed as limitation of the scope of the invention in no instance.ThisField is it will be appreciated by the skilled person that the device and method be described in detail and be shown in the accompanying drawings herein are non-limiting schematicallyEmbodiment, and the range of various embodiments of the invention is limited only by claim.A kind of schematic embodiment partyThe feature that formula shows and describes can be in conjunction with the feature of other embodiment, it is intended that by such modifications and variations include thisIn the range of invention.
A kind of appearance diagram of stapler with articulated joint 1 as shown in Fig. 2, including：End effector 2,Elongated shaft 3 and Handleset 4；
End effector 2 may include anvil block 21 and nail bin groupware 22, and surgical instruments further includes closed system and trigger system,Closed system is configured to generate closed action, and including the close handles 41 in Handleset 4, close handles 41 are controllableAnvil block 21, which relatively rotates, generates closed action, to clamp tissue, trigger system then includes firing handle 42, passes through percussionHandle 42, which operates, may make blade is pushed forward to release with the staple in nail bin, to carry out cutting suture to tissue.Closed systemThe drive connection part of system and trigger system is all disposed in elongated shaft 3, i.e., elongated shaft 3 is used as end effector 2 and Handleset 4Between transmission mechanism accommodating portion.
Its end effector 2 can be pivotly connected with elongated shaft 3 by articulated joint 1.Articulated joint 1 is set asSo that end effector 2 carries out joint motions around book shaft opposite elongate axis 3, so that operator can execute endDevice 1 carries out joint motions and is adjusted to suitable angle, to be easy access to the surgical site of patient's body.
In conjunction with attached drawing 2-4, in order to enable relatively fixed after adjusting 2 angle of end effector, articulated joint 1 is equipped withLocking mechanism 5；End effector and the opposite locking of elongated shaft are realized in by locking mechanism 5:Locking mechanism includes lockingDisk 6 and locking level 7, locking disk 6 and end effector 1 are relatively fixed, and locking level 7 is located in elongated shaft 3, can be with 3 phase of elongated shaftTo movement, the side that locking disk 6 is in contact with locking level 7 is a curved surfaces, the radian and locking disk of 7 end surface of locking level6 curved surfaces match, and are arranged so that locking level 7 and 6 surface of locking disk can be contacted adequately, locking level 7 is connected withReset spring (not shown), the specific implementation of reset spring can refer to the existing patent skill referred in background techniqueArt, under the elastic force effect of reset spring, locking level 7 is that bias offsets with locking disk 6 in normal state, locking level 7 and lock6 surface of price fixing is arranged to the roughness for having certain, and the frictional force of the two generates enough torque, to prevent end effector2 and elongated shaft 3 relatively rotate.Wherein torque size is that end effector may be subject in operation according to surgical instrumentsThe torque that external force generates designs, it is therefore an objective to the torque that frictional force generates is set as the torque greater than external force, to keep phaseTo locking.It can unlock, be additionally provided with unlocking part 10, unlocking part 10 connects in elongated shaft 3 and with locking level 7, when willWhen unlocking part 10 is pulled far from 2 direction of end effector, the biasing force that locking level 7 can be driven to overcome returning spring is movedIt is dynamic, so that 6 relative separation of locking level 7 and locking disk, forms unlocked state.
Referring to attached drawing 5-6, after locking mechanism is in the unlocked state, locking disk 6 is relatively rotated with respect to locking level 7, thenThe releasing force applied is unclamped, opposite locking, locking disk 6 are locked in corresponding angle again for locking disk 6 and locking level.
In addition, in order to increase frictional force and protection part, locking level has been set as two parts composition referring again to attached drawing 3, wrapThe connecting rod 9 for including the friction head 8 as end and being connect with friction head 8, the i.e. radian on 8 surface of friction head and 6 arc of locking diskSurface matches.Connecting rod 9 is made of rigid material, such as stainless steel and other metal materials or high rigidity plastics etc., is guaranteedThe conduction of bonding strength and power；Friction head 8 is then made of elastic material, such as the high molecular materials such as rubber, and surface is setFor roughness with higher, the higher roughness, be for the instrument other component surface roughness, can be obviousThe biggish friction in surface is experienced, in addition, elastic material such as rubber etc., itself has certain viscosity, further increasesTorque size.So that the pressing of locking level 7 and locking disk 6 is more close, the frictional force of generation is bigger.In lock stateUnder, friction head 8 contacts with locking disc side under the active force of returning spring and generates deformation
End effector 2 can gyration there is certain range, the under normal circumstances rotational angle of relatively primitive position90 degree are not exceeded.When end effector 2 turns to maximum angle, in order to guarantee to be in lockable state, locking level 7End portion width be less than or equal to 6 width of locking disk, and the contact surface of the end of locking level 7 and locking disk 6 is without departing from locking disk 6Curved surfaces.
As described above, we are illustrated fully according to spirit of the invention, but the present invention is not limited to above-mentioned realityApply example and implementation method.The practitioner of correlative technology field can carry out different in the range of technical idea of the invention is permittedVariation and implementation.