Summary of the invention
The present invention will provide a kind of closed gap control device of surgical cutting and stapling instrument, after solving prior art cathetus stapler grasping tissue, the head end in its closed gap and the variable thickness of tail end cause, and then organizing of causing is cross-section and when sewing up, the inconsistent technical problem of nail molding.
In order to solve the problems of the technologies described above, the invention provides a kind of gap control device of surgical cutting and stapling instrument, comprising train wheel bridge, described train wheel bridge distal shaft is to being provided with inner chamber, and described intracavity bottom axially offers the first chute; Assembly clamping plate, described assembly clamping plate are U-shaped, axially offer gathering sill bottom it; Band blade, described band blade comprises the cutting knife of body construction and the installation of body construction far-end; The upper end of described cutting knife is provided with locating piece, rotatingly on described locating piece is provided with roller, described roller can in train wheel bridge inner chamber the first chute both sides end face on slide axially; The lower end of described cutting knife is provided with limiting plate, and described limiting plate is positioned at the bottom of described assembly clamping plate through gathering sill.
Preferably, described locating piece offers circular hole, described roller center is provided with installing hole, and described roller is two, is arranged on the rotating shaft in described circular hole, is arranged on the both sides of described locating piece respectively by one.
More preferably, also sliding bearing is provided with between the inwall of described circular hole and described rotating shaft.
Preferably, the internal diameter of the circular hole described locating piece offered and the external diameter of described sliding bearing match; Due to described sliding bearing same be provided with installing hole, therefore described roller and described sliding bearing have the internal diameter matched with the diameter of described rotating shaft respectively.
Preferably, described locating piece and described limiting plate vertical described cutting knife setting respectively.
More preferably, described locating piece is rectangular block, and the upper surface of described locating piece lower surface and described limiting plate parallels, and by the distance between locating piece lower surface and described limiting plate upper surface, comes the closed gap in cutting and stitching process of control device.
Preferably, described train wheel bridge inner chamber first chute both sides are respectively equipped with the first limited step and the second limited step, the work surface of fixed block two side wheel contacts with described first limited step and the second limited step respectively, and slides axially with band blade at described train wheel bridge first chute and slide.
Present invention also offers a kind of surgical cutting and stapling instrument, described surgical cutting and stapling instrument comprises above-mentioned arbitrary described gap control device.
Preferably, surgical cutting and stapling instrument provided by the invention, the lower surface of its train wheel bridge intracavity bottom is provided with nail groove, this apparatus also comprises nail bin, and described nail bin is axially arranged with middle seam, and middle seam both side surface is provided with nail, be provided with staple in nail, described nail bin is arranged on assembly clamping plate far-end;
Be arranged on the percussion push jack below nail bin, described percussion push jack is a pair, lays respectively at the both sides of described band blade; And being positioned at the push button of described band blade and described percussion push jack end, described push button is fixedly connected with described band blade, described percussion push jack respectively.
After apparatus is closed, the fixed block relatively rotating roller is installed and enters interior intracavity set by train wheel bridge, when carrying out organizing joint-cutting, described band blade and described percussion push jack is driven to be slided to nail bin far-end by nail bin near-end by push button, and then drive cutting knife upper end be provided with relatively rotate roller fixed block in the inner chamber set by described train wheel bridge along the first slide, described limiting plate is in the basal sliding of assembly clamping plate, and percussion staple completes cutting and the stitching of tissue.
Preferably, described surgical cutting and stapling instrument is line cutting stitching instrument.
Common, we are fixedly connected with formed assembly are respectively referred to as cutting and stitching assembly by pulling the trigger push jack, band blade in line cutting stitching instrument with push button.
In the present invention, due to far-end cutting knife upper of the band blade at apparatus, lower end is provided with respectively can the fixed block being slidably fitted with roller of control gap and limiting plate, along with the propelling of band blade, the fixed block relatively rotating roller is installed slide axially in train wheel bridge inner chamber, limiting plate slides at assembly clamping plate lower bottom part, by the closed gap of the fixed range control device between locating piece and limiting plate, thus overcome due to after existing line cutting stitching instrument grasping tissue, the head end in its closed gap and the variable thickness of tail end cause, and then organizing of causing is cross-section and when sewing up, the inconsistent defect of nail molding, closed consistent in the process that apparatus is cut at grasping tissue, guarantee staple molding concordance.In addition, fixed block installs the mode of roller by sliding bearing, rotating shaft, relative motion between sliding bearing and roller, greatly reduce frictional resistance, and then reduce the percussion thrust of apparatus.
Detailed description of the invention
Understand technical scheme of the present invention better to make those skilled in the art can be implemented, below in conjunction with the drawings and specific embodiments, the invention will be further described, but illustrated embodiment is not as a limitation of the invention.
Present embodiments provide a kind of gap control device of preferred surgical cutting and stapling instrument, for line cutting stitching instrument, as illustrated in figs. 2-7, the gap control device of above-mentioned surgical cutting and stapling instrument, comprise train wheel bridge 2, described train wheel bridge 2 distal shaft, to being provided with inner chamber 21, axially offers the first chute 22 bottom described inner chamber 21; The assembly clamping plate 1 that can close relative to train wheel bridge 2 or open, described assembly clamping plate 1 are U-shaped, axially offer gathering sill 11 bottom it; Band blade 3, described band blade 3 comprises the cutting knife 31 of body construction and the installation of body construction far-end; The upper end of described cutting knife 31 is provided with locating piece 32, described locating piece 32 is provided with roller 323 in relative rotation, described roller 323 can in train wheel bridge inner chamber 21 first chute 22 both sides end face on slide axially; The lower end of described cutting knife 31 is provided with limiting plate 33, and described limiting plate 33 is positioned at the bottom of described assembly clamping plate 1 through gathering sill 11.
Described locating piece 32 is arranged with the not vertical described cutting knife 31 of described limiting plate 33.Preferably, described locating piece 32 is for being fixed on the rectangular block on band blade 3, and the upper surface of described locating piece 32 lower surface and described limiting plate 33 parallels; Fixed range between the locating piece 32 arranged respectively by the top and bottom of the cutting knife 31 set by band blade 3 body construction far-end and limiting plate 33 comes the closed gap of control device in cutting and stitching process.The concrete structure of above-mentioned locating piece 32 and limiting plate 33 can also replace with other structure with control gap function or profiles.
Preferably, the work surface due to roller 323 is against the enterprising line slip in train wheel bridge inner chamber 21 bottom surface, and therefore, we also can come the tissue closure gap of control device in cutting and stitching process by the fixed range between roller 323 and limiting plate 33.
As shown in fig. 6-7, described locating piece 32 offers circular hole 321, described roller 323 is provided with installing hole, and described roller 323 is two, and described roller 323 is arranged on the rotating shaft 324 in circular hole 321 by one, is arranged on described locating piece 32 both sides respectively.Preferably, between described locating piece 32 and described rotating shaft, be also provided with sliding bearing 322, namely between described circular hole 321 inwall and described rotating shaft 324, sliding bearing 322 be in relative rotation installed.
Preferably, the internal diameter of circular hole 321 described locating piece 32 offered and the external diameter of described sliding bearing 322 match; Described roller 323 and described sliding bearing 322 have the internal diameter matched with the diameter of described rotating shaft 324 respectively.Because described roller 323 is two, lays respectively at the both sides of described sliding bearing 322, make associated member uniform force, apparatus stability strengthens.Adopt the design that sliding bearing 322 is such, in traveling process, greatly reduce the frictional force between each parts of association.
Preferably, described locating piece 32, sliding bearing 322, roller 323, rotating shaft 324 are metalwork.
Described limiting plate 33 is installed by the mounting groove 12 of assembly clamping plate 1, and after installation, limiting plate 33 is positioned at the bottom outside of described assembly clamping plate 1.
Preferably, the middle part of described train wheel bridge 2 is also provided with the second mounting groove, when train wheel bridge 2 and assembly clamping plate 1 close, band blade 3 upper end of installing in assembly clamping plate 1 is provided with the fixed block 32 relatively rotating roller 323 and enters in train wheel bridge inner chamber 21 by the second mounting groove set in the middle part of train wheel bridge, along with the slip of band blade 3, described in be provided with relatively rotate roller 323 fixed block 32 and described limiting plate 33 respectively in train wheel bridge inner chamber 21 and the basal sliding of assembly clamping plate.This structure effectively to control between train wheel bridge 2 and assembly clamping plate 1 while gap, makes slip in gathering sill 11 set assembly clamping plate 1 in that band blade 3 can be firm, greatly strengthens the stability of apparatus.
As shown in Figure 2, described train wheel bridge inner chamber 21 first chute 22 both sides are respectively equipped with the first limited step 23 and the second limited step 24, after apparatus is closed, during original state, the roller 323 that described locating piece 32 both sides are installed offsets with described first limited step 23 and the second limited step 24 respectively, at locating piece 32 with in band blade 3 traveling process, the work surface of described roller 323 and described first limited step 23 and the second limited step 24 contact, and slide axially with band blade 3 at described train wheel bridge first chute 22 and slide.
Preferably, described locating piece 32 is a rectangular block, the cross-sectional height of described train wheel bridge inner chamber 21 is slightly larger than the cross-sectional height of described locating piece 32, the cross-sectional width of described train wheel bridge inner chamber 21, slightly larger than the distance between described locating piece 32 liang of side wheel 323 lateral surface, may ensure that described roller 323 is advanced in train wheel bridge inner chamber 21 smoothly with locating piece 32.
The annexation about the roller 323 set by locating piece 32 described in the present embodiment is only a kind of example, the present invention can also adopt the annexation be equal to above-mentioned annexation to arrange, as long as realize roller 323 to carry out rolling or sliding relative to described locating piece 32, can be good at reducing mutual frictional force.
The present embodiment additionally provides a kind of preferred surgical cutting and stapling instrument, for line cutting stitching instrument, as shown in figs. 1-7, above-mentioned line cutting stitching instrument comprises assembly clamping plate 1, the cross section of its assembly clamping plate 1 is U-shaped, axially offer gathering sill 11 bottom it, band blade 3 can be made to slide axially along gathering sill 11, and the first mounting groove 12 facilitating above-mentioned band blade 3 to install; The far-end of assembly clamping plate 1 is provided with nail bin 4, and described nail bin 4 is axially arranged with middle seam 41, stitches 41 both sides and is provided with nail, be provided with staple in nail in described nail bin upper surface edge.
Train wheel bridge 2, relatively with assembly clamping plate 1 can close or open, the distal shaft of described train wheel bridge 2 is to being provided with inner chamber 21, described inner chamber 21 can be one-body molded by described train wheel bridge, also can be formed by fixedly connecting by two metalworks, bottom its inner chamber 21, axially offer the first chute 22, concrete, described first chute 22 is opened on the centrage of inner chamber 21 bottom surface, and the lower surface bottom described inner chamber 21 is provided with the nail groove corresponding with described nail position uniformly along the first chute 22 both sides.
Above-mentioned line cutting stitching instrument also comprises can through the band blade 3 be arranged in assembly clamping plate 1 stitching 41 slide anteroposterior in nail bin, be arranged on the percussion push jack 5 below nail bin 4, and be arranged on band blade 3 and percussion push jack 5 afterbody for fixing and push button 6 both driving, described percussion push jack 5 is a pair, lays respectively at the both sides of described band blade 3.
Preferably, the middle part of described train wheel bridge 2 also offer be suitable for described band blade 3 upper end the second mounting groove that the fixed block 32 relatively rotating roller 323 enters inner chamber 21 is installed, when train wheel bridge 2 and assembly clamping plate 1 close, described in the fixed block 32 relatively rotating roller 323 be installed entered in train wheel bridge inner chamber 21 by the second mounting groove.
When described band blade 3 is arranged on assembly clamping plate, limiting plate 33 enters gathering sill 11 by the first mounting groove 12 of assembly clamping plate 1, after installation, limiting plate 33 is positioned at the exterior bottom of described assembly clamping plate 1, the structure of limiting plate 33 not only ensure that organizes joint-cutting gap, and make slip in gathering sill 11 set in assembly clamping plate 1 that band blade 3 can be firm, greatly strengthen the stability of apparatus.
Due to train wheel bridge first chute 22, in nail bin, seam 41 is corresponding consistent with assembly clamping plate gathering sill 11 direction, after apparatus is closed, be provided with in inner chamber 21 that the fixed block 32 relatively rotating roller 323 enters set by train wheel bridge, when carrying out organizing joint-cutting, described band blade 3 and described percussion push jack 5 is driven to be slided to nail bin 4 far-end by nail bin 4 near-end by push button 6, and then drive the locating piece 32 with roller 323 set by cutting knife 31 upper end to slide along the first chute 22 in the inner chamber 21 set by train wheel bridge, limiting plate 33 contact bottom assembly clamping plate slides, percussion staple completes cutting and the stitching of tissue.
The operation principle of the preferred line cutting stitching instrument of the present embodiment is as follows:
As shown in Figure 1-2, the original state of this line cutting stitching instrument is above-mentioned train wheel bridge, assembly jaws close, during use, open apparatus, put between nail bin 4 and train wheel bridge 2 need the tissue of cutting, train wheel bridge 2 is corresponded to assembly clamping plate 1 and is inserted by locking positioning pin closed, now, the fixed block 32 relatively rotating roller 323 that is provided with set on band blade 3 enters in the inner chamber 21 of train wheel bridge by the second mounting groove, pressing flexible handle, until handle locking, promote above-mentioned push button 6, above-mentioned band blade 3 and percussion push jack 5 are slided to nail bin 4 far-end by nail bin 4 near-end respectively by inner chamber bottom seam 41 in described nail bin and nail bin with push button 6, carry out tissue cutting and staple percussion, complete stitching.Meanwhile, what be fixed on band blade 3 upper end is provided with the fixed block 32 relatively rotating roller 323, also under push button 6 thrust, is distally slided in described train wheel bridge inner chamber 21 along the first chute 22 by near-end.Then to pull back above-mentioned push button 6, open apparatus, take out above-mentioned nail bin 4.Due to be provided with relatively rotate roller 323 fixed block 32 and limiting plate 33 respectively in train wheel bridge inner chamber 21 and assembly clamping plate 1 basal sliding, the clamping thickness of control device to tissue is carried out by its fixed range therebetween, make the tissue thickness of the head end of closed gap nail bin 4 after grasping tissue and tail end clamping basically identical, guarantee staple molding concordance.In addition, by sliding bearing 322 interlock roller 323 on locating piece 32, the first limited step 23 in described roller 323 and train wheel bridge inner chamber 21 and the second limited step 24 offset and roll, and greatly reduce the frictional force between each parts.
Near-end herein, far-end limited according to industry practice, and be namely near-end from person close to doctor during operation, opposite end is far-end.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.