CN110559029A - Stapler staple cartridge assembly - Google Patents
Stapler staple cartridge assembly Download PDFInfo
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- CN110559029A CN110559029A CN201810574059.XA CN201810574059A CN110559029A CN 110559029 A CN110559029 A CN 110559029A CN 201810574059 A CN201810574059 A CN 201810574059A CN 110559029 A CN110559029 A CN 110559029A
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- Prior art keywords
- groove
- joint
- supporting
- push blade
- blade
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- 238000005452 bending Methods 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 230000008093 supporting effect Effects 0.000 claims description 72
- 230000033001 locomotion Effects 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000009527 percussion Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 241000463219 Epitheca Species 0.000 claims description 2
- 238000010304 firing Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 5
- 230000003872 anastomosis Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/07285—Stapler heads characterised by its cutter
Abstract
The invention provides a stapler nail box component, which comprises a nail box front end component and a nail box rear end component which are connected through a bending execution mechanism, wherein the nail box rear end component comprises a shell, a pull rod, a push blade and a safety structure which are arranged in the shell; the push blade penetrates through the upper part of the bending actuating mechanism and is connected with the cutting knife. According to the invention, the push blade is narrower compared with the existing structure, and occupies a smaller part of space of the shell, so that the arrangement of the safety structure in the shell is convenient; and after the width of the push blade is narrowed, the resistance required to be overcome during bending is reduced, and the shell is bent at a larger angle under the same operating force.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a staple cartridge assembly of an anastomat.
Background
At present, the endoscope cutting anastomat is mainly divided into a disposable manual endoscope cutting anastomat, a disposable electric endoscope cutting anastomat and an electric cutting anastomat. The most widely applied electric anastomat mainly comprises a power handle, a connecting rod, a nail box assembly and the like, and can realize cutting anastomosis, bending and rotation through different transmission mechanisms, so that the electric anastomat is suitable for cutting anastomosis at different angles in a complex environment.
The staple cartridge assembly of the existing stapler is mainly composed of a front end assembly with a staple cartridge and a rear end assembly for connecting with a connecting rod, wherein the front end assembly is rotatably connected with the rear end assembly, and the front end assembly is driven to rotate around the rear end assembly through a pull rod in the rear end assembly, so that the bending and angle adjustment of the staple cartridge assembly are realized. In the prior art, in order to ensure the thrust of the push blade, the width of the push blade is large and occupies the whole space of the shell, and the middle part is provided with a groove along the front and back directions; in addition, the occupied space is large, the arrangement of a safety structure in the shell is inconvenient, the existing safety structure is complex, the number of parts is large, the assembly is complex, and the failure risk of the actuating mechanism is large.
Disclosure of Invention
in view of the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a stapler magazine assembly that is reasonably arranged, compact, and reduces the operating force required to bend the pusher blade.
in order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
A stapler nail box component comprises a nail box front end component and a nail box rear end component which are connected through a bending execution mechanism, wherein the nail box rear end component comprises a shell, a pull rod, a push blade and a safety structure, the pull rod, the push blade and the safety structure are arranged in the shell, the front end of the push blade is connected with a cutting knife of the nail box front end component, the front end of the pull rod is connected with the bending execution mechanism, an inner cavity of the shell provides a moving space for the forward and backward movement of the push blade and the safety structure, the push blade is positioned on the upper portion of the inner cavity of the shell, the safety structure comprises a connecting seat and an execution element, the rear portion of the push blade is connected with the connecting seat, and the; the push blade penetrates through the upper part of the bending actuating mechanism and is connected with the cutting knife.
By adopting the arrangement structure, the push blade is narrowed compared with the existing structure, only half of the existing structure occupies a smaller part of space of the shell, so that more space is reserved for the safety structure, and the arrangement of the safety structure in the shell is facilitated; and after the width of the push blade is narrowed, the resistance required to be overcome during bending is reduced, and the shell is bent at a larger angle under the same operating force. The arrangement structure is in a vertical distribution mode, convenient to assemble, free of mutual interference and compact in structure.
Further, the casing includes epitheca and inferior valve, executive component is including ending a position piece and elasticity retaining element, it installs on the connecting seat to end the position piece rotation, elasticity retaining element and end a position piece and be connected, make the free end of ending a position piece press to inferior valve bottom, under the effect of percussion force connecting seat, end a position piece along with push away blade along casing axial motion, be provided with diversion structure and end a position structure on the inferior valve, in the push away blade back-off in-process is accomplished in a percussion, end a position piece and rotate under diversion structure effect to support when the secondary percussion on the structure of ending, prevent push away blade forward motion.
When once percussion, end the position piece and follow connecting seat and push away the blade forward motion, end the position piece and incline backward, can pass through end the position structure, accomplish push away the blade and roll back the in-process once percussion, make through diversion structure and end the position piece and rotate to inclining forward, can also pass through when rolling back end the position structure, and when secondary percussion moves forward, because it inclines forward and supports on ending the position structure to restriction push away blade forward motion, prevented secondary percussion promptly, realize the safty function. The safety structure mainly comprises a connecting seat, a lower shell, a stop block, an elastic retaining element and the like, and has the advantages of few parts, simple structure and convenience in assembly. The theory of operation is simple, realizes conflicting spacing with ending the position structure through ending changing to of position piece, reduces the risk that the mechanism became invalid, guarantees the stability of mechanism's operation.
furthermore, the turning structure is arranged in an avoiding groove in the lower shell, the stop block extends into the avoiding groove after the first triggering and in the process of returning, and the stop block rotates forwards under the action of the rear groove wall of the avoiding groove and exceeds the position, perpendicular to the lower shell, of the stop block.
Furthermore, a limiting groove is formed in the lower shell and located behind the turning structure, the front wall of the limiting groove forms the stopping structure, and the rear wall of the limiting groove forms a stopping point of the stopping block moving backwards.
Furthermore, a first sliding groove corresponding to the stop block and a second sliding groove corresponding to the connecting seat are axially formed in the lower shell, the stop block can move back and forth along the first sliding groove, the connecting seat is located in the second sliding groove and can move back and forth along the second sliding groove, and the first sliding groove is lower than the second sliding groove; and the bottom of the second sliding groove and the lower edge of the push blade form a limiting structure for limiting the rotation range of the stop block, a stop piece is arranged on the stop block or the elastic retaining element, and the stop piece is abutted against the push blade or the bottom of the second sliding groove to realize limiting in the rotation process of the stop block.
Furthermore, the rear end of the push blade is provided with a hook part, an extension part is formed in the rear part of the push blade, the extension part extends into the connecting seat and abuts against the connecting seat when the push blade moves forwards to transmit the thrust.
furthermore, the bending execution mechanism comprises a connecting piece, a first joint and a second joint, wherein the first joint and the second joint are hinged to the connecting piece respectively, the first joint is connected with the front end component of the nail box, the second joint is connected with the rear end component of the nail box, the first joint and the second joint are provided with arc-shaped parts which are arranged oppositely, teeth are arranged on the arc-shaped parts, the first joint and the second joint are meshed through the teeth, and the pull rod is connected with the connecting piece in a rotating mode.
The first joint and the second joint are respectively hinged with the connecting piece, and the pull rod is hinged with the connecting piece; when the connecting piece is driven by the pull rod to rotate relative to the second connector, the first connector also rotates along with the connecting piece, and simultaneously rotates relative to the second connector under the action of the meshing teeth, so that the first connecting piece simultaneously revolves and rotates, and the bending angle of the nail box is increased under the condition that the stroke of the pull rod is fixed.
Further, the connecting piece comprises a connecting sleeve, and a supporting seat, a supporting block and a pressing block which are sequentially connected from top to bottom, the pressing block, the supporting block and the supporting seat are installed in the connecting sleeve, the joint part of the first joint and the second joint is located between the supporting block and the pressing block, the first joint and the second joint are respectively in rotating connection with the supporting block, a supporting groove is formed in the supporting seat, and the push blade penetrates through the supporting groove.
furthermore, the supporting groove gradually expands from the middle to two ends, the groove wall of the supporting groove is of an arc structure facing back to back, a supporting frame is arranged on the outer side of the push blade, two ends of the supporting frame are respectively arranged on the front end component and the rear end component of the nail box, the supporting frame and the push blade penetrate through the supporting groove, and the middle of the supporting frame abuts against the arc structure when the front end component of the nail box bends.
When the anastomat executes the action of turning, the front end, the rear end and the middle part of the support frame are stressed, compared with a structure without a support in the middle of the traditional structure, the bending uniformity of the support frame and the push blade can be ensured, and the unsmooth operation caused by the overlarge local bending is avoided. The support groove is of a back-to-back arc structure, effective support of the middle part of the support frame can be guaranteed when the support groove is bent forwards and backwards, and the support effect of the arc structure is better.
Further, a strip-shaped hole is formed in the support frame along the length direction, the strip-shaped hole penetrates through the thickness direction of the support frame, and the depth of the support groove is larger than or equal to the width of the support frame and the width of the push blade which are located in the support groove.
As mentioned above, the beneficial effects of the invention are: compared with the existing structure, the push blade of the invention is narrowed, only half of the existing structure occupies a smaller part of space of the shell, thereby reserving more space for the safety structure and facilitating the arrangement of the safety structure in the shell; and after the width of the push blade is narrowed, the resistance required to be overcome during bending is reduced, and the shell is bent at a larger angle under the same operating force. The arrangement structure is in a vertical distribution mode, convenient to assemble, free of mutual interference and compact in structure.
Drawings
FIG. 1 is a schematic view of a magazine assembly;
FIG. 2 and FIG. 3 are sectional views of the magazine assembly from the middle up and down;
FIG. 4 is an exploded view of the magazine assembly;
FIG. 5 is an exploded view of the bend actuator with push blade and pull rod;
Fig. 6 and 7 are schematic views of the installation of the bending actuator and the push blade;
FIG. 8 is a schematic view of the safety structure and the exploded structure of the lower shell;
FIG. 9 is a view taken along line A-A of FIG. 1;
FIG. 10 is a view taken along line B-B of FIG. 1;
FIG. 11 is a schematic structural view of the stop block moving forward with the connecting seat and the push blade when the first percussion;
FIG. 12 is a schematic view of the first-time fired forward rotation direction change structure when the stop block passes through the direction change structure during retraction;
FIG. 13 is a schematic view of the stopping block abutting against the stopping structure to stop the forward movement of the pushing blade during the second firing.
Description of reference numerals
100-staple cartridge nose assembly; 101-a cutter;
200-a turn actuator; 201-a support seat; 202-a support block; 203-briquetting; 204-connecting sleeve; 205-a first joint; 206-a second joint; 207-support grooves; 208-connecting column; 209-central axis; 210-a central hole; 211-avoidance ports; 212-a limit projection; 213-limit step; 214-tooth; 215-inclined plane;
300-magazine back end assembly; 301-upper shell; 302-inferior shell; 303-a push blade; 304-a pull rod; 305-a connecting seat; 306-a stop block; 307-a resilient holding element; 308-pin shaft; 309-a support frame; 310-strip-shaped holes; 311-avoidance slots; 312-a limiting groove; 313-limiting groove front wall; 314-retaining groove rear wall; 315-an extension; 316-hook part; 317-a first chute; 318-a second runner; 319-mounting groove; 320-stop.
Detailed Description
the following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The front and back directions of the invention are based on the use state of the anastomat, one side of the anastomat facing a patient is the front, and the other side of the anastomat facing away from the patient is the back.
Examples
As shown in fig. 1 to 4, a staple cartridge assembly of a stapler comprises a staple cartridge front end assembly 100 and a staple cartridge rear end assembly 300 which are connected with each other through a bending actuator 200, wherein the staple cartridge rear end assembly 300 comprises a housing, a pull rod 304, a push blade 303 and a safety structure which are arranged in the housing, the rear end of the housing is a connecting part connected with a connecting rod of the stapler, the housing comprises an upper shell 301 and a lower shell 302, and the staple cartridge front end assembly 100 comprises a staple cartridge, a staple anvil, a cutter 101 and the like; the front end of the push blade 303 is connected with the cutting knife 101 of the front end component 100 of the nail box, the front end of the pull rod 304 is connected with the bending actuating mechanism 200, the inner cavity of the shell provides a moving space for the forward and backward movement of the push blade 303 and a safety structure, the push blade 303 is positioned at the upper part of the inner cavity of the shell, the safety structure comprises a connecting seat 305 and an actuating element, the rear part of the push blade 303 is connected with the connecting seat 305 and can synchronously move forward and backward, and the actuating element is positioned at the lower part of the inner cavity of the shell; the push blade 303 penetrates through the upper part of the bending actuator 200 and is connected with the cutting knife 101.
By adopting the arrangement structure, the push blade 303 is a long strip-shaped structure with a rectangular cross section, is narrowed compared with the existing structure, only has half of the existing structure, and occupies a smaller part of space of the shell, so that more space is reserved for the safety structure, and the safety structure is convenient to arrange in the shell; and after the width of the push blade 303 is narrowed, the resistance required to be overcome during bending is reduced, and the push blade can be bent to a larger angle under the same operating force. The arrangement structure is in a vertical distribution mode, convenient to assemble, free of mutual interference and compact in structure.
as shown in fig. 5 to 7, the bending actuator 200 for bending the magazine includes a first connector 205, a second connector 206, and a connector for connecting the first connector 205 and the second connector 206, wherein the first connector 205 is connected to the front magazine end assembly 100, and the second connector 206 is connected to the rear magazine end assembly 300; the first joint 205 and the second joint 206 are respectively hinged with the connecting piece, the hinged position of the first joint 205 and the connecting piece is a first rotating center, the hinged position of the second joint 206 and the connecting piece is a second rotating center, the first rotating center and the second rotating center are at a certain distance, the first joint 205 and the second joint 206 are provided with arc-shaped parts which are oppositely arranged, teeth 214 are correspondingly arranged on the arc-shaped parts of the first joint 205 and the second joint 206, the first joint 205 and the second joint 206 are meshed through the teeth 214, the connecting piece is provided with a connecting part which is used for being rotatably connected with the pull rod 304 of the anastomat, the rotating connecting position of the connecting rod and the pull rod 304 is a third rotating center, and the third rotating center and the second rotating center are at a certain distance; i.e. the second centre of rotation is offset from the third centre of rotation so as to create a moment that drives the connecting element in rotation.
The first joint 205 and the second joint 206 are respectively hinged with a connecting piece, and the pull rod 304 is hinged with the connecting piece; since the second nosepiece 206 is fixed to the magazine rear end assembly 300, when the linkage is driven by the pull rod 304, the linkage rotates about the second center of rotation relative to the second nosepiece 206, and the first nosepiece 205 also rotates about the second center of rotation with the linkage, and simultaneously rotates about the first center of rotation relative to the second nosepiece 206 under the influence of the intermeshing teeth 214, so that the first linkage simultaneously has a superposition of two bending motions, i.e., the magazine front end assembly 100 has a superposition of two bending motions relative to the magazine rear end assembly 300, thereby increasing the magazine bending angle with a constant forward and backward movement stroke of the pull rod 304. And the bending angle range is-90 degrees to +90 degrees, thereby meeting the operation requirement of large-angle bending and adapting to the cutting and anastomosis of complex environment tissues.
Preferably, the connecting part is a connecting column 208 or a connecting hole provided on the connecting member. Correspondingly, the front end of the pull rod 304 is provided with a hole matched with the connecting column 208 or a shaft matched with the connecting hole. In this case, the connecting column 208 is preferred, and the front end of the pull rod 304 is sleeved on the connecting column 208.
preferably, the rear portion of the first connector 205 and the front portion of the second connector 206 are each in the form of a truncated cone, and the teeth 214 are disposed on opposite sides of the truncated cone. The forward portion of the first nosepiece 205 is a first connecting end for securing to the magazine front end assembly 100, and the forward portion of the second nosepiece 206 is a second connecting end for securing to the magazine rear end assembly 300.
In one embodiment, the first connector 205 and the second connector 206 are respectively provided with a central hole 210 at the middle of the truncated cone structure, the connector comprises a support block 202, two central shafts 209 are arranged on the support block 202, the first connector 205 is rotatably connected with the support block 202 through one set of central holes 210 and central shafts 209, and the second connector 206 is rotatably connected with the support block 202 through the other set of central holes 210 and central shafts 209.
In another embodiment, the first joint 205 and the second joint 206 are respectively provided with a central shaft 209, and the supporting block 202 is provided with two central holes 210; the first joint 205 and the second joint 206 are respectively rotatably connected with the supporting block 202 through a set of central shafts 209 and a central hole 210.
Preferably, the first joint 205 and the second joint 206 are provided with a limiting structure for limiting the maximum relative rotation angle between the two. The limiting structures in this example are inclined surfaces 215 arranged on two sides of the truncated cone-shaped structures of the first joint 205 and the second joint 206, and the limiting structures are abutted against the limiting structures through the inclined surfaces 215 matched with each other when the first joint 205 rotates forwards and backwards to the maximum position.
in order to ensure the stability of the fit between the first joint 205 and the second joint 206 during rotation and prevent the first joint and the second joint from swinging longitudinally; the connecting piece further comprises a pressing block 203, a connecting hole is formed in the pressing block 203, the pressing block 203 and the supporting block 202 are buckled with the central shaft 209 through the connecting hole, and the connecting part of the first connector 205 and the second connector 206 is clamped in the middle.
On the basis, in order to facilitate the support of the stapler push blade 303, the connecting piece further comprises a support seat 201, a support groove 207 for the push blade 303 to pass through is formed in the support seat 201, the push blade 303 passes through the support groove 207, the pressing block 203 is located on one side of the support block 202, the support seat 201 is located on the other side of the support block 202, and the support seat 201 is connected with the support block 202 through a pin shaft and a pin hole.
Preferably, the connecting column 208 is arranged on the supporting seat 201, and the supporting block 202 is provided with an escape opening 211 corresponding to the connecting column 208, so that the pull rod 304 does not interfere with the supporting block 202 in the process of rotating around the connecting column 208. In another embodiment, the connecting column 208 may also be provided on the support block 202 or the pressing block 203.
further, in order to facilitate the integral assembly of the connecting member, the bending actuator 200 further includes a connecting sleeve 204, and the connecting sleeve 204 is sleeved outside the connecting member; namely, the pressing block 203, the supporting block 202 and the supporting seat 201 are installed in the connecting sleeve 204.
Preferably, the width of the supporting slot 207 in the front-back direction gradually expands from the middle to both ends, the slot walls of the supporting slot 207 are in an arc structure facing away from each other, the supporting frame 309 is arranged outside the pusher blade 303, the front end and the back end of the supporting frame 309 are respectively arranged on the front end component 100 of the magazine and the rear end component 300 of the magazine, the supporting frame 309 and the pusher blade 303 pass through the supporting slot 207, and the middle part of the supporting frame 309 abuts against the arc structure when the front end component 100 of the magazine is bent. According to the structure, when the anastomat performs a bending action, the front end, the rear end and the middle part of the support frame 309 are stressed, compared with a structure without a support in the middle of the traditional structure, the bending uniformity of the support frame 309 and the push blade 303 can be ensured, and the unsmooth operation caused by the fact that local bending is too large is avoided. The supporting groove 207 is of a back-to-back arc structure, effective supporting of the middle of the supporting frame 309 can be guaranteed when the supporting groove is bent forwards and backwards, and the supporting effect of the arc structure is better.
Preferably, both ends of the supporting frame 309 are movably installed in the front end component 100 and the rear end component 300 of the magazine, and can move back and forth relative to the front end component 100 and the rear end component 300 of the magazine, and the supporting frame 309 can move relatively to reduce the bending resistance; limiting structures for limiting the front-back movement range of the support frame 309 are arranged between the front end component 100 and the rear end component 300 of the magazine and the support frame 309.
In this example, the limiting structure comprises a limiting step 213 arranged on the front end assembly 100 and the rear end assembly 300 of the magazine and a limiting projection 212 arranged on the end of the supporting frame 309, and the limiting projection 212 is stopped on the limiting step 213, so as to limit the front-back movement range of the supporting frame 309. In this example, for the convenience of assembly, a limit step 213 is provided in front of the first connector 205 and in rear of the second connector 206.
Preferably, the two walls of the supporting groove 207 form a hyperbolic structure, and the curvature of the two walls is symmetrical, so that the supporting function and the bending uniformity are the same when the supporting groove is bent forwards and backwards.
Preferably, the supporting frame 309 is provided with a hollow structure. The hollowed-out structure reduces the bending resistance of the support frame 309.
In this embodiment, the supporting frame 309 is a supporting sheet, a strip-shaped hole 310 is formed in the supporting frame 309 along the length direction, and the strip-shaped hole 310 penetrates through the supporting frame 309 in the thickness direction. The depth of the supporting groove 207 is greater than or equal to the width of the supporting frame 309 and the pushing blade 303 in the supporting groove 207. The supporting frame 309 and the pushing blade 303 in the supporting groove 207 are guaranteed to be effectively supported.
The depth of the supporting groove 207 is greater than or equal to the width of the supporting frame 309 and the pushing blade 303 in the supporting groove 207. The supporting frame 309 and the pushing blade 303 in the supporting groove 207 are guaranteed to be effectively supported.
As shown in fig. 8 to 10, the actuating element includes a stop block 306 and an elastic holding element 307, wherein the push blade 303 is disposed inside the lower shell 302, and the connecting seat 305 is connected to the rear portion of the push blade 303 and can move back and forth synchronously with the push blade 303; the stop block 306 is rotatably mounted on the connecting seat 305 in a front-back manner, the elastic holding element 307 is connected with the stop block 306, the end part of the stop block 306 is pressed towards the lower shell 302 in an initial state and is contacted with the lower shell 302, the connecting seat 305 and the stop block 306 move along with the push blade 303 along the axial direction (length direction) of the lower shell 302 under the action of a firing force, a direction changing structure and a stop structure are arranged on the lower shell 302, the stop block 306 is inclined backwards in the initial state, and the stop block 306 can pass through the stop structure and the direction changing structure and does not change the direction in the first firing; when one-time firing is completed and the push blade 303 retracts, the stop block 306 rotates forwards to be forwards inclined under the action of the direction changing structure and abuts against the stop structure to prevent the push blade 303 from moving forwards during the second-time firing.
When the push blade 303 is pushed to move forwards by a second trigger, the stop block 306 moves forwards along with the connecting seat 305 and the push blade 303, the stop block 306 tilts backwards, and through the stop structure, when the push blade 303 is pushed to move backwards by the first trigger, the stop block 306 rotates to tilt forwards through the direction change structure, and can also pass through the stop structure when the push blade is pushed to move forwards by the second trigger, and the stop block abuts against the stop structure due to the forward tilt of the stop block, so that the push blade 303 is limited to move forwards, namely, the second trigger is prevented, and a safety function is realized. The safety structure mainly comprises a connecting seat 305, a lower shell 302, a stop block 306, an elastic retaining element 307 and the like, and has the advantages of few parts, simple structure and convenience in assembly. The theory of operation is simple, realizes conflicting spacing with ending the position structure through ending changing to of position piece 306, reduces the risk that the mechanism became invalid, guarantees the stability of mechanism's operation.
Preferably, the stop block 306 and the elastic holding element 307 are both located in the space between the lower shell 302 and the push blade 303, the rear end of the push blade 303 has a hook portion 316, the rear portion of the push blade 303 inwardly forms an extending portion 315, the connecting seat 305 is provided with a groove corresponding to the extending portion, the extending portion 315 extends into the connecting seat 305 and abuts against the connecting seat 305 when the push blade 303 moves forward, so as to transmit the pushing force. The hook portion 316 is used for being connected with a rear actuator to pull the push blade 303 to move back, and when the push blade 303 is driven to move forward, the actuator acts on the connecting seat 305 to drive the push blade 303 to move forward through the abutting action of the connecting seat 305 and the extending portion 315, so that the stress of the push blade is ensured.
Preferably, a limiting structure for limiting the rotation range of the stop block 306 is formed between the lower shell 302 and the push blade 303, that is, the range of the stop block 306 rotating back and forth is limited by the push blade 303 and the lower shell 302.
Preferably, a first sliding groove 317 corresponding to the stop block 306 is axially formed on the lower shell 302, the stop block 306 moves back and forth along the first sliding groove 317, a second sliding groove 318 corresponding to the connecting seat 305 is axially formed on the lower shell 302, the connecting seat 305 is supported in the second sliding groove 318 and can move back and forth along the second sliding groove 318, and the position of the first sliding groove 317 is lower than that of the second sliding groove 318. The first sliding groove 317 and the second sliding groove 318 play a role of limiting and guiding.
Preferably, the direction changing structure is an avoiding groove 311 formed in the lower shell 302, the depth of the avoiding groove 311 is such that the stop block 306 does not touch the bottom of the avoiding groove 311 when rotating to the vertical direction of the lower shell 302, the stop block 306 falls into the avoiding groove 311 after the first firing and retreating, and during the retreating process, the stop block rotates forwards due to the blocking effect of the rear groove wall of the avoiding groove 311 and exceeds the position where the stop block 306 is perpendicular to the lower shell 302, that is, the stop block inclines forwards from the backwards inclination, and the stop block keeps pressing against the lower shell 302 under the effect of the elastic retaining element 307.
In this embodiment, a limiting groove 312 is preferably disposed on the lower shell 302 behind the direction changing structure, a front wall 313 of the limiting groove forms the stopping structure, and a rear wall 314 of the limiting groove forms a stopping point for the stopping block 306 to move backwards, so as to limit the distance for the pushing blade 303 to move backwards. The limiting groove 312 is lower than the first sliding groove 317, and the avoiding groove 311 is lower than the limiting groove 312.
Further, the connecting socket 305 is a cylindrical structure, and has a mounting groove 319, the stop block 306 is rotatably mounted in the mounting groove 319 of the connecting socket 305 by a pin 308, and the end portion of the stop block extends out of the mounting groove 319. The groove bottom of the second sliding groove 318 and the edge of the push blade 303 form a limiting structure for limiting the rotation range of the stop block 306, the stop block 306 or the elastic holding element 307 is provided with a stop piece 320, and in the rotation process of the stop block 306, the stop piece 320 is abutted against the groove bottom of the push blade 303 or the second sliding groove 318 to realize limiting.
The elastic holding element 307 is a torsion spring or a spring, preferably a spring in this embodiment, and the spring is fixedly connected to the stop block 306, and the stop member 320 is formed by extending an end of the spring.
To facilitate the stop block 306 to pass the stop structure during the first firing forward movement, the surface (i.e., the front side) of the free end of the stop block 306 facing the lower shell 302 is beveled or curved.
The movement process of the push blade 303 and the stop block 306 will be briefly described below with reference to the accompanying drawings, and the direction indicated by the arrows in fig. 9-11 is the movement direction of the push blade 303: as shown in fig. 1, the stop block 306 is located in the limiting groove 312 in the initial state; as shown in fig. 11, in the first firing process, a pushing force is applied to the connecting seat 305 to advance the pushing blade 303, and the stop block 306 moves forward along with the connecting seat 305 and turns over the front wall 313 of the limit groove and the avoiding groove 311 to continue moving forward; as shown in fig. 12, after the first firing is completed, a pulling force is applied to the hook portion 316, the stop block 306 moves backwards along with the push blade 303 and the connecting seat 305, and after moving to the avoiding groove 311, the stop block 306 rotates forwards by a certain angle under the action of the elastic sheet and under the blocking action of the groove wall behind the avoiding groove 311, so that the stop block 306 further rotates forwards and rotates past the position perpendicular to the lower shell 302, and then inclines forwards and continues to move backwards to the initial position; as shown in fig. 13, in the second firing, since the stop block 306 has been tilted forward, the stop block 306 is kept pressed against the lower shell 302 under the elastic force of the elastic sheet, and when pushing force is applied to the connecting seat 305, the stop block 306 will abut against the front wall 313 of the limit groove and cannot go over the limit groove 312, so that the second firing is prevented, and misoperation is prevented.
Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a stapler nail casket subassembly, includes the nail casket front end subassembly and the nail casket rear end subassembly that link to each other through the actuating mechanism that turns round, nail casket rear end subassembly includes the casing and sets up pull rod, broach piece and the insurance structure in the casing, broach piece front end is connected with the cutting knife of nail casket front end subassembly, the pull rod front end with the actuating mechanism that turns round connects its characterized in that: the safety structure comprises a connecting seat and an execution element, the rear part of the push blade is connected with the connecting seat, and the execution element is positioned at the lower part of the inner cavity of the shell; the push blade penetrates through the upper part of the bending actuating mechanism and is connected with the cutting knife.
2. The stapler cartridge assembly of claim 1, wherein: the casing includes epitheca and inferior valve, executive component is including ending a position piece and elasticity retaining element, it installs on the connecting seat to end the position piece rotation, elasticity retaining element with end the position piece and be connected, make the free end of ending the position piece press to inferior valve bottom, under the effect of percussion force connecting seat, end the position piece along with push away the blade along casing axial motion, be provided with diversion structure and end the position structure on the inferior valve, at the one-shot percussion completion push away the blade and roll back the in-process, end the position piece and rotate under the diversion structure effect to support when secondary percussion and be in end the position structure, prevent push away the blade and move forward.
3. The stapler cartridge assembly of claim 2, wherein: the turning structure is arranged in an avoiding groove in the lower shell, the stop block extends into the avoiding groove after the first triggering and in the process of returning, and the stop block rotates forwards under the action of the rear groove wall of the avoiding groove and exceeds the position, perpendicular to the lower shell, of the stop block.
4. The stapler cartridge assembly of claim 2, wherein: the rear of being located the diversion structure on the inferior valve is provided with the spacing groove, the spacing groove antetheca forms end the bit architecture, the spacing groove back wall forms the stop position point that the stop block moved backward.
5. The stapler cartridge assembly of claim 2, wherein: a first sliding groove corresponding to the stop block and a second sliding groove corresponding to the connecting seat are axially formed in the lower shell, the stop block can move back and forth along the first sliding groove, the connecting seat is located in the second sliding groove and can move back and forth along the second sliding groove, and the first sliding groove is lower than the second sliding groove; and the bottom of the second sliding groove and the lower edge of the push blade form a limiting structure for limiting the rotation range of the stop block, a stop piece is arranged on the stop block or the elastic retaining element, and the stop piece is abutted against the push blade or the bottom of the second sliding groove to realize limiting in the rotation process of the stop block.
6. The stapler cartridge assembly of claim 1, wherein: the rear end of the push blade is provided with a hook part, an extending part is formed in the rear part of the push blade, the extending part extends into the connecting seat and abuts against the connecting seat when the push blade moves forwards to transmit thrust.
7. The stapler cartridge assembly of claim 1, wherein: the bending actuating mechanism comprises a connecting piece, a first joint and a second joint, wherein the first joint and the second joint are hinged to the connecting piece respectively, the first joint is connected with a front end component of the nail box, the second joint is connected with a rear end component of the nail box, the first joint and the second joint are provided with arc-shaped portions which are arranged oppositely, teeth are arranged on the arc-shaped portions, the first joint and the second joint are meshed through the teeth, and the pull rod is connected with the connecting piece in a rotating mode.
8. the stapler cartridge assembly of claim 7, wherein: the connecting piece comprises a connecting sleeve, and a supporting seat, a supporting block and a pressing block which are sequentially connected from top to bottom, the pressing block, the supporting block and the supporting seat are installed in the connecting sleeve, the joint part of the first joint and the second joint is located between the supporting block and the pressing block, the first joint and the second joint are respectively in rotating connection with the supporting block, a supporting groove is formed in the supporting seat, and the push blade penetrates through the supporting groove.
9. The stapler cartridge assembly of claim 8, wherein: the support groove gradually expands from the middle to two ends, the groove wall of the support groove is of an arc structure which is back to back, a support frame is arranged on the outer side of the push blade, two ends of the support frame are respectively arranged on the front end component and the rear end component of the nail box, the support frame and the push blade penetrate through the support groove, and when the front end component of the nail box bends, the middle of the support frame abuts against the arc structure.
10. The stapler cartridge assembly of claim 9, wherein: a strip-shaped hole is formed in the supporting frame along the length direction, the strip-shaped hole penetrates through the thickness direction of the supporting frame, and the depth of the supporting groove is larger than or equal to the width of the supporting frame and the width of the push blade which are located in the supporting groove.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574059.XA CN110559029A (en) | 2018-06-06 | 2018-06-06 | Stapler staple cartridge assembly |
| PCT/CN2018/125615 WO2019233094A1 (en) | 2018-06-06 | 2018-12-29 | Nail box assembly for anastomat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574059.XA CN110559029A (en) | 2018-06-06 | 2018-06-06 | Stapler staple cartridge assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110559029A true CN110559029A (en) | 2019-12-13 |
Family
ID=68772497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810574059.XA Pending CN110559029A (en) | 2018-06-06 | 2018-06-06 | Stapler staple cartridge assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110559029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111513782A (en) * | 2020-04-26 | 2020-08-11 | 重庆迈科唯医疗科技有限公司 | Cutting and anastomosis device |
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