Stapler push blade bent support mechanismTechnical field
The utility model belongs to the field of medical instrument technology, and in particular to a kind of stapler push blade bent support mechanism.
Background technique
Hysteroscope Endo-GIA is broadly divided into disposable manual hysteroscope Endo-GIA, the cutting of disposable motor-driven hysteroscope at presentThree kinds of stapler, electronic Endo-GIA.Wherein most widely used is electronic stapler, mainly by power handle, connecting rodConstituted with nail kit component etc., by different transmission mechanisms can be realized cutting coincide, bending and rotation, to adapt to complicated ringThe cutting of different angle coincide in border.
The nail kit component of existing stapler is mainly by the front end assemblies with nail kit and the rear end for being connected with connecting rodComponent composition, front end assemblies and aft-end assembly are rotatablely connected, and drive front end assemblies around rear end group by the pull rod in aft-end assemblyPart rotation, to realize the bending and angular adjustment of nail kit component.This structure, without support in the middle part of push blade, in push bladeIn bending process, bending force is larger, and bending uniformity is poor；It is easy to cause local buckling angle and bending force excessive, influences to cutThe ability of tissue and anastomosed tissue.
Utility model content
In view of the above deficiencies of the prior art, the purpose of this utility model is to provide a kind of stapler push blade is curvedBent supporting mechanism guarantees curved uniformity.
In order to achieve the above objects and other related objects, technical solutions of the utility model are as follows:
A kind of stapler push blade bent support mechanism, the supporting mechanism is arranged in stapler nail kit component, describedStapler nail kit component includes nail kit front end assemblies, nail kit aft-end assembly, push blade and the support frame being held on the outside of push blade；It is characterized by: the supporting mechanism includes the support base being arranged between nail kit front end assemblies and nail kit aft-end assembly, supportFrame both ends are connect with nail kit front end assemblies and nail kit aft-end assembly, the support base front and back end it is corresponding with nail kit front end assemblies andNail kit aft-end assembly is rotatablely connected, and offers the support slot gradually expanded by centre to both ends, the support on the support baseThe cell wall of slot be back to arcuate structure, support frame as described above and push blade pass through the support slot, are bent in nail kit front end assembliesWhen, support frame as described above middle part is against on the arcuate structure.
Using the above structure, when stapler execution curves movement, stress at support frame front and back end and middle part three, compared toUnsupported structure, can guarantee support frame and the curved uniformity of push blade, avoid local buckling excessive in the middle part of traditional structureSurgical procedure is caused to have some setbacks.Support slot be back to arcuate structure, can guarantee in the middle part of support frame in positive contraflexureEffective support, and arcuate structure support effect is more preferable.
Further, the radian of two cell walls of the support slot is relative to push blade is symmetrical and/or the radian of single cell wallIt is symmetrical in the longitudinal direction.
Further, engraved structure is provided on support frame as described above.The bending resistance of engraved structure reduction support frame.
Further, strip-shaped hole is offered on support frame as described above along its length, the strip-shaped hole is thick through support frame as described aboveSpend direction.
Further, the depth of the support slot is more than or equal to the width of the support frame and push blade that are located in support slot.It protectsSupport frame and push blade of the card in support slot are effectively supported.
Further, support frame as described above both ends are movably installed in nail kit front end assemblies and nail kit aft-end assembly, and can front and backIt is mobile；Restricted support frame is set between the nail kit front end assemblies and nail kit aft-end assembly and support frame and is moved forward and backward rangePosition limiting structure.
Further, the position limiting structure include the limited step that is set on nail kit front end assemblies and nail kit aft-end assembly withAnd the retention bead of support frame end is set.
Further, the first connector and the second connector are rotatably equipped on the support base, before first connector and nail kitComponent connection is held, the second connector is connect with nail kit aft-end assembly.
Further, first connector and the second connector are rotatablely connected by way of shaft hole matching with support base respectively.
Further, the stapler push blade bent support mechanism further includes connector sleeve, first connector rear portion, secondConnector front and support base are installed in the connector sleeve.
As described above, the beneficial effects of the utility model are: stapler execution curve movement when, support frame front and back end andStress at middle part three can guarantee that support frame and push blade are curved uniformly compared to structure unsupported in the middle part of traditional structureProperty, avoid local buckling is excessive surgical procedure is caused to have some setbacks.Support slot be back to arcuate structure, in positive contraflexure Shi JunnengIt is enough to guarantee to effective support in the middle part of support frame, and arcuate structure support effect is more preferable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (omitting rotation connection structure) of the utility model embodiment
Fig. 2 is the cross-sectional view that support base is connect with nail kit front end assemblies and nail kit aft-end assembly；
Fig. 3 and Fig. 4 is the schematic diagram of support base, support frame and rotation connection structure；
Fig. 5 is the explosive view of support base and push blade and support frame.
Piece mark explanation
1- support base；11- support slot；2- connector sleeve；3- push blade；4- support frame；41- strip-shaped hole；42- retention bead；The first connector of 51-；The second connector of 52-；53- limited step；54- central axis；6- cutter；100- nail kit front end assemblies；200- nailCasket aft-end assembly.
Specific embodiment
The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by thisContent disclosed by specification understands other advantages and effect of the utility model easily.
Front and back position described in the utility model is reference, a Fang Weiqian of the stapler towards patient with stapler use stateSide is rear away from patient, i.e. nail kit is preceding, and power handle is rear.
Embodiment
As shown in Figures 1 to 5, a kind of stapler push blade bent support mechanism, supporting mechanism setting are followed closely in staplerIn cartridge component, the stapler nail kit component includes nail kit front end assemblies 100, nail kit aft-end assembly 200, push blade 3 and clampingSupport frame 4 in 3 outside of push blade, the supporting mechanism includes being arranged between nail kit front end assemblies and nail kit aft-end assemblySupport base 1,4 front end of support frame are connect with nail kit front end assemblies 100, and 4 rear end of support frame is connected with nail kit aft-end assembly 200, instituteIt states 1 one end of support base and nail kit front end assemblies 100 is rotatablely connected, the other end and nail kit aft-end assembly 200 are rotatablely connected, the branchSupport slot 11 is offered on support seat 1, the width of support slot 11 in the longitudinal direction is gradually expanded by centre to both ends, the support slot11 cell wall be back to arcuate structure, support frame as described above 4 and push blade 3 pass through the support slot 11,3 front end of push blade with cutKnife 6 connects, and when nail kit front end assemblies 100 are bent, is against on the arcuate structure in the middle part of support frame as described above 4.Nail kit front groupThe structure of part 100 and nail kit aft-end assembly 200 belongs to the prior art, and details are not described herein.
The structure, when stapler execution curves movement, stress at 4 front and back end of support frame and middle part three, compared to traditionUnsupported structure, can guarantee support frame 4 and the curved uniformity of push blade 3, avoid local buckling is excessive from making in the middle part of structureIt has some setbacks at surgical procedure.Support slot 11 be back to arcuate structure, can guarantee in positive contraflexure to the middle part of support frame 4Effective support, and arcuate structure support effect is more preferable.
Preferably, 4 both ends of support frame as described above are movably installed in nail kit front end assemblies 100 and nail kit aft-end assembly 200,And can be moved forward and backward relative to nail kit front end assemblies 100 and nail kit aft-end assembly 200, support frame 4 can relatively move, and reduce bendingResistance；It is arranged before and after restricted support frame 4 between the nail kit front end assemblies 100 and nail kit aft-end assembly 200 and support frame 4 and movesThe position limiting structure of dynamic range.
In this example, position limiting structure includes the limited step being set on nail kit front end assemblies 100 and nail kit aft-end assembly 20053 and the retention bead 42 of 4 end of support frame is set, retention bead 42 is kept off on the limited step 53, to limit branchSupport 4 is moved forward and backward range.
Preferably, the first connector 51 and the second connector 52 are rotatably equipped on the support base 1, first connector 51It is connect with nail kit front end assemblies 100, the second connector 52 is connect with nail kit aft-end assembly 200.
Specifically, the first connector 51 and the second connector 52 are rotatablely connected by way of shaft hole matching with support base 1 respectively；There are two central axises 54, the first connector 51 and the second connector 52 to be respectively arranged with centre bore for setting on support base 1 in this example, leads toIt crosses centre bore to be sheathed on central axis 54, to form hinged relationship；The front end of first connector 51 and nail kit front end assemblies 100 connectFixation is connect, 52 rear end of the second connector is connected and fixed with nail kit aft-end assembly 200.For convenient for assembly, limited step 53 is set in this exampleIt is placed in 52 rear portion of 51 front of the first connector and the second connector.
For the installation of the components such as seat 1 easy to support, stapler push blade bent support mechanism further includes connector sleeve 2, and first51 rear portion of connector, 52 front of the second connector and support base 1 are installed in the connector sleeve 2.
Preferably, the radian of two cell walls of the support slot is symmetrical relative to push blade, the radian of single cell wall existsIt is symmetrical on front-rear direction.I.e. support slot 11 two cell walls formed hyperbolic configuration, the crooked radian of two cell walls is symmetrical, guarantee just,Supporting role is identical with bending uniformity when contraflexure.
As a further preference, engraved structure is provided on support frame 4.Engraved structure reduces the bending resistance of support frame 4Power.
Support frame 4 is support chip in this example, offers strip-shaped hole 41 along its length on support frame 4, strip-shaped hole 41 runs through4 thickness direction of support frame.The depth of the support slot 11 is more than or equal to the support frame 4 and push blade 3 being located in support slot 11Width.Guarantee that the support frame 4 and push blade 3 being located in support slot 11 are effectively supported.
Any person skilled in the art all can be under the spirit and scope without prejudice to the utility model, to above-described embodimentCarry out modifications and changes.Therefore, such as those of ordinary skill in the art without departing from disclosed in the utility modelSpirit with technical idea under all equivalent modifications or change for being completed, should be contained by the claim of the utility modelLid.