Stapler with precisely controllable pusher speed and accuracy

Abstract

An anastomat capable of precisely controlling the pushing speed and accuracy of a push rod, comprising a rotating handle, the rotating handle comprising: a handle housing, a driving mechanism being arranged in the handle housing; a rotating assembly rotatably arranged at the front end of the handle housing; a sleeve assembly, the rear end of which is connected with the rotating assembly; a push rod and a connecting piece, which are in sliding fit with the sleeve assembly; a knob assembly, the tail end of the connecting piece being in transmission fit with the knob assembly, so that the knob assembly is rotated to pull the connecting piece to slide in the sleeve assembly; the driving mechanism comprising a transmission rack in sliding fit with the handle housing, a rack transmission member, and a trigger in pivotal fit with the handle housing, the front end of the transmission rack being in plug-in fit with the tail end of the push rod, so that the push rod is rotatably arranged and can be moved by the transmission rack when the transmission rack is moved, a plurality of wedge-shaped teeth being arranged below the transmission rack; the middle part of the trigger being in pivotal fit with the handle housing, the front end of the trigger being arranged outside the handle housing, a trigger torsional spring being arranged between the trigger and the handle housing for driving the trigger to reset; the tail end of the rack transmission member being in pivotal fit with the tail end of the trigger, the front end of the rack transmission member being provided with a clamping portion which can be inserted between adjacent wedge-shaped teeth, a transmission member torsional spring being arranged between the clamping portion and the tail end of the trigger.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an anastomosis device that can precisely control the pushing speed and accuracy of the push rod. Background Technology

[0002] In existing technologies, staplers are medical devices used as an alternative to manual suturing. Their main working principle involves using titanium staples to sever or anastomose tissue. Compared to traditional manual suturing, instrumental suturing offers advantages such as ease of operation, single-use, prevention of cross-infection, tight sutures, appropriate tightness, fewer side effects, and effectively reduced surgical complications.

[0003] Patent publication number CN103315788B discloses a cutting and anastomosis device suitable for minimally invasive surgery, comprising the following components: a housing with a drive mechanism inside; a rotating head rotatably mounted on the front end of the housing; a sleeve connected at its rear end to the rotating head and at its front end to an execution component; a connecting rod connected at its rear end to the drive mechanism for driving the execution component to complete cutting and anastomosis actions; two articulated push rods slidably mounted in the sleeve for driving the execution component to swing left and right; and a joint knob mounted on the rotating head and connected to the rear end of the articulated push rods. When the joint knob is rotated, it causes the two articulated push rods to slide in opposite directions. This invention's cutting and anastomosis device has a joint knob on the rotating head, which allows the execution component to rotate and swing left and right. However, the aforementioned cutting and anastomosis device has a complex structure, and the position cannot be locked when using a trigger to control the drive rod, resulting in insufficient precision in the cutting and suturing area. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a simple anastomosis device with a rotating handle and a method of using it, which has a simple structure and precise cutting and suturing position.

[0005] To solve the above-mentioned technical problems, the anastomosis device provided by the present invention includes a rotating handle, the rotating handle comprising:

[0006] The handle housing contains a drive mechanism.

[0007] A rotating component is rotatably mounted on the front end of the handle housing;

[0008] The sleeve assembly is connected to the rotating assembly at its rear end;

[0009] The push rod and connecting piece slide in conjunction with the sleeve assembly;

[0010] The toggle assembly has a connecting piece at its tail end engaging with the toggle assembly, causing the connecting piece to slide within the sleeve assembly when the toggle assembly rotates.

[0011] The drive mechanism includes a transmission rack that slides with the handle housing, a rack and pinion drive component, and a trigger that pivotally engages with the handle housing. The front end of the transmission rack is inserted into the tail end of a push rod, allowing the push rod to rotate. The movement of the transmission rack drives the push rod to move. Multiple wedge-shaped teeth are provided below the transmission rack. The middle part of the trigger is pivotally engaged with the handle housing, and the front end of the trigger is located outside the handle housing. A trigger torsion spring is provided between the trigger and the handle housing to drive the trigger to reset. The tail end of the rack and pinion drive component is pivotally connected to the tail end of the trigger. In conjunction with this, the front end of the rack and pinion drive is provided with a locking part that can be inserted between adjacent wedge teeth. A transmission torsion spring is provided between the locking part and the tail end of the trigger to support the locking part so that the locking part extends obliquely upward. When the trigger is in the initial state, the locking part of the rack and pinion drive is positioned below the wedge teeth. When the front end of the trigger is pulled obliquely backward, the tail end of the trigger tilts upward, causing the rack and pinion drive to tilt upward. The locking part of the rack and pinion drive is inserted between adjacent wedge teeth. When the trigger is continued to be rotated, the rack and pinion drive drives the transmission rack to slide forward in the handle housing.

[0012] Furthermore, the rotating assembly includes an upper rotating housing, a lower rotating housing, and a sliding seat. The upper and lower rotating housings are fastened together to form a rotating housing. The tail end of the rotating housing is rotatably engaged with the front end of the handle housing. The sliding seat is slidably disposed within the rotating housing. The tail end of the sleeve assembly extends into the rotating housing and engages with it in a transmission manner. A through hole is axially provided at the center of the sliding seat. The tail end of the push rod passes through the sliding seat and engages with the front end of the transmission rack. The front end of the push rod passes through the sliding seat and is placed within the sleeve assembly, so that rotating the rotating housing drives the sleeve assembly to rotate. The tail end of the connecting piece... The toggle assembly, housed within the rotating housing, includes a toggle, a drive shaft, a drive gear, a rack, and a steering plate. A mounting hole is provided through the upper rotating housing. The bottom end of the toggle is rotatably disposed within the mounting hole. The bottom end of the drive shaft is fixedly connected to the drive gear, and the top end of the drive shaft is fixedly connected to the toggle. The lower part of the steering plate slides against the side wall of the sliding seat, and the front end of the steering plate engages with the tail end of the connecting piece. A rack is fixedly disposed above the steering plate, meshing with the drive gear, so that when the toggle rotates, it drives the steering plate to slide back and forth along the sliding seat, thereby causing the connecting piece to slide within the sleeve assembly.

[0013] Furthermore, the drive mechanism also includes a reset pin, a rack connecting piece, a tension spring, and a connecting piece reset component. A guide protrusion is provided at each end of the side wall of the transmission rack. The rack connecting piece has oblique grooves at both ends that match the guide protrusions. The guide protrusions are inserted into the oblique grooves of the rack connecting piece. A mounting groove is provided on the upper part of the tail end of the transmission rack along the sliding direction of the transmission rack. The tension spring and the connecting piece reset component are placed in the mounting groove. The front end of the tension spring is fixedly connected to the end wall of the mounting groove, and the tail end of the tension spring is connected to the front end of the connecting piece reset component. A through groove is provided on the handle housing along the sliding direction of the transmission rack. A first slot is provided at the tail end of the transmission rack. The connecting piece has a second through slot at its tail end, and the connecting piece reset piece has a third slot at its tail end. The reset pin passes through the through slot, the first slot, the second slot, and the third slot, so that the tension spring and the connecting piece reset piece support the reset pin. The rack connecting piece is suspended on one side of the transmission rack. The width of the snap-fit ​​part is greater than the width of the transmission rack, so that the rack connecting piece is positioned above the snap-fit ​​part. When the reset pin is pulled back, it drives the rack connecting piece to move. The rack connecting piece moves obliquely downward under the cooperation of the oblique sliding groove and the guide protrusion. The rack connecting piece presses down on the snap-fit ​​part, causing the rack transmission component to disengage from the adjacent wedge teeth of the transmission rack, thereby realizing the pull-back reset of the transmission rack.

[0014] Furthermore, the drive mechanism also includes a safety pin, a safety block, a safety block torsion spring, and a button spring. The front end of the safety block is fixedly connected to the handle housing via the safety block torsion spring so that the safety block is positioned at the front end of the transmission rack. The rear end face of the safety block is symmetrically provided with limiting protrusions, and the inner surfaces of the two limiting protrusions are inclined to form a first V-groove between the two limiting protrusions. The safety pin is columnar, and an annular limiting block is fixedly provided in the middle of the safety pin. A rhomboid lower part that matches the shape of the first V-groove is fixedly provided on one side of the annular limiting block. The handle housing has a safety pin through hole suitable for the end of the safety pin to extend out. Button springs are respectively sleeved on both ends of the safety pin, so that the annular limiting block and the inner wall of the handle housing are supported by the button springs. During assembly, the safety pin is set on the lower front end of the transmission rack, and the diamond-shaped lower pressure block is placed in the first V-groove. The top of the safety block blocks the transmission rack and limits its movement. When the safety pin is squeezed, the inclined inner surface of the diamond-shaped lower pressure block and the limiting protrusion cooperates to drive the safety block to move down to disengage from the transmission rack and release the obstruction to the transmission rack.

[0015] Furthermore, a wedge-shaped guide is provided at the top of the rear end face of the safety block, and an arc-shaped chamfer is provided on the lower side of the front end of the transmission rack, so that the resistance between the safety block and the transmission rack can be reduced when the safety block is pressed down; a second V-shaped groove is provided at the top of the limiting protrusion, and the bottom end of the second V-shaped groove is set higher than the bottom end of the first V-shaped groove, so that the safety pin is squeezed, the diamond-shaped pressing block is disengaged from the first V-shaped groove and enters the second V-shaped groove, and the safety block is in a pressed state.

[0016] Furthermore, the drive mechanism also includes a firing interlock block, an interlock block torsion spring, and a reset push button. The firing interlock block is arranged in a transverse V-shape at the front end of the transmission rack. The first end of the firing interlock block is pivotally connected to the handle housing via a third pivot. The second end of the firing interlock block is provided with a wedge-shaped blocking portion. The front end of the transmission rack is provided with a limiting support adapted to the wedge-shaped blocking portion, so that when the firing interlock block is placed flat, the wedge-shaped blocking portion abuts against the limiting support of the transmission rack. One end of the reset push button is driven to the sliding seat, and the other end of the reset push button is driven to the front end of the third end of the firing interlock block, so that when the sliding seat slides backward, it can push the firing interlock block to rotate around the third pivot, and the wedge-shaped blocking portion disengages from the limiting support of the transmission rack. The interlock block torsion spring is sleeved on the third pivot and is used to drive the firing interlock block to reset.

[0017] Furthermore, the sleeve assembly includes a sleeve, a connecting pipe, a connecting pipe mounting base, and a fixing ring. The connecting pipe mounting base has an axially extending through-hole. The tail end of the connecting pipe is inserted into the through-hole. The side walls of the connecting pipe mounting base and the connecting pipe have sliding surfaces. An isolation support is provided inside the fixing ring, forming a first limiting groove and a second limiting groove. The first limiting groove of the fixing ring is fitted onto the front end of the connecting pipe mounting base. The sliding surface of the connecting pipe mounting base is closely attached to the isolation support. The tail end of the connecting piece passes through the second limiting groove and engages with the steering piece. The fixing ring is fixedly connected to the inner wall of the tail end of the sleeve, so that the connecting piece is placed on the inner wall of the sleeve and engages with the... Between the outer walls of the connecting pipe; the outer wall of the tail end of the sleeve is fixedly connected to the front end of the rotating housing, so that when the rotating housing rotates, it can drive the sleeve, the fixing ring, the connecting pipe mounting seat, and the connecting pipe to rotate synchronously, and when the steering plate slides, it can drive the connecting plate to move back and forth along the sliding plane; the sleeve assembly also includes a transmission pipe, a sliding block, and an anti-rotation plate, the transmission pipe is sleeved inside the connecting pipe, the push rod passes through the transmission pipe, and the outer diameter of the transmission pipe is smaller than the inner diameter of the mounting seat through hole, so that the transmission pipe can pass through the mounting seat through hole and contact the sliding seat; the front end of the push rod is provided with an anti-rotation plate sliding plane, the anti-rotation plate sliding plane extends to the front end of the transmission pipe, and the connecting pipe is provided with a downward pressure sliding groove, the... The anti-rotation plate is slidably fitted on the anti-rotation plate sliding plane. The sliding block is placed in the downward sliding groove and fixedly connected to the anti-rotation plate. When the anti-rotation plate slides along the anti-rotation plate sliding plane to the front end of the transmission tube, the top surface of the sliding block contacts the inner wall of the sleeve, pressing the anti-rotation plate tightly against the anti-rotation plate sliding plane. The tail end of the anti-rotation plate contacts the front end face of the transmission tube, which is used to push the transmission tube, thereby pushing the sliding seat and the reset push button to move backward to push the firing interlock block to rotate. The sleeve assembly also includes a positioning plate, a positioning plate support spring, an assembly exit button, and a bayonet spring. The positioning plate includes a transverse plate and a longitudinal limiting support placed at the front end of the transverse plate. A fixed support is provided between the inner side of the transverse plate and the push rod. The positioning plate support spring is used to support the positioning plate. The outer side of the tail end of the transverse plate is fixedly connected to the inner wall of the sleeve. The push rod is provided with a push rod slot. The longitudinal limiting support of the positioning plate is placed at the push rod slot so that when the front end of the positioning plate is squeezed, the longitudinal limiting support is radially inserted into the push rod slot to limit the axial displacement of the push rod. The connecting pipe is provided with an exit button slide groove. The sleeve is provided with a through exit button mounting groove. The front end of the component exit button is provided with a pushing protrusion that extends out of the exit button mounting groove. The bayonet spring is placed between the component exit button and the side wall of the exit button slide groove to buffer the component exit button and drive the component exit button to reset.The component's eject button has a wedge-shaped pressing part at its tail end, and the positioning plate has an arc-shaped chamfer at its front end. The wedge-shaped pressing part is positioned immediately adjacent to the front end of the arc-shaped chamfer, so that when the component's eject button is pushed backward, it can press the front end of the positioning plate, thus axially limiting the push rod.

[0018] Furthermore, the stapler also includes an articulated actuator for performing cutting and anastomosis actions. The articulated actuator includes a staple cartridge seat, an anvil seat, an upper connecting seat, a lower connecting seat, a steering pull plate, multiple push blades, a cutting blade, an actuator sleeve, a staple cartridge connecting rod, a connecting rod cover plate, a push tube, an ejection button, and a positioning element. The cutting blade and the push blades are stacked to form an axial drive assembly. The staple cartridge connecting rod and the connecting rod cover plate are fastened together to form a hollow actuator housing. This actuator housing is fitted inside the actuator sleeve, and its tail end protrudes for insertion into the connecting tube. One side of the actuator housing has a pull plate groove suitable for the sliding of the steering pull plate. The tail end of the steering pull plate passes through the sleeve and engages with the front end of the connecting plate. The tail of the anvil seat... The upper and lower connecting seats are pivotally connected to the staple cartridge seat, forming a connecting seat assembly. The tail end of the staple cartridge seat is fixedly connected to the connecting seat assembly. The upper and lower ends of the connecting seat assembly are pivotally connected to the actuating sleeve via a fourth pivot. A fifth pivot is provided on one side of the connecting seat assembly, and the fifth pivot is parallel to the fourth pivot. The front end of the steering pull tab is driven by the fifth pivot, so that when the steering pull tab moves back and forth, it can drive the connecting seat assembly to swing left and right around the fourth pivot. The axial drive assembly is slidably connected to the actuating housing. The push tube is sleeved on the tail end of the axial drive assembly. When the front end of the push rod is inserted into the actuating housing, it engages with the push tube to drive the axial drive assembly to move. The front end of the component extends out of the execution housing. A downward pressing pin is fixedly installed on the upper part of the front end of the axial drive component, and a pusher fixing plate is fixedly connected to the lower part of the front end of the axial drive component. The upper end face of the pusher fixing plate slides with the lower end face of the staple cartridge seat. The downward pressing pin slides with the upper end face of the pin holder. The center of the staple cartridge seat is provided with a cutting blade groove suitable for the axial drive component to pass through, so that when the push rod pushes the axial drive component forward, the axial drive component moves forward in the cutting blade groove, and the downward pressing pin and the pusher fixing plate drive the pin holder to close with the staple cartridge seat. An ejector button mounting groove is provided axially on the side wall of the execution housing. A through limiting slot is provided on one side of the ejector button mounting groove, and a mounting component sliding groove is provided on the other side of the ejector button mounting groove. The ejector button is provided with... The positioning element is arc-shaped, with a sliding protrusion in the middle that slides with the inclined ejection groove. One end of the arc-shaped positioning element has a positioning limiting protrusion, and the tail end of the axial drive assembly has an arc-shaped limiting tail. During assembly, the ejection button is placed in the ejection button mounting groove, with the tail end of the ejection button extending out of the sleeve. The sliding protrusion of the positioning element is inserted into the inclined ejection groove, and the limiting protrusion passes through the limiting slot and is positioned at the front end of the arc-shaped limiting tail, limiting the axial drive assembly. When the ejection button is pushed to slide along the ejection button mounting groove, the inclined ejection groove and the sliding protrusion engage, causing the positioning element to rotate. The limiting protrusion disengages from the arc-shaped limiting tail, and the positioning element no longer limits the axial drive assembly.

[0019] A method of using a stapler includes the following steps:

[0020] A. Insert the articulated actuator into the rotary handle, so that the tail end of the actuator housing is inserted into the front end of the connecting tube, the front end of the connecting piece is engaged with the tail end of the steering pull piece, the front end of the push rod extends into the actuator housing and engages with the push tube, and the tail end of the actuator housing is engaged with the inner wall of the connecting tube. The anti-rotation plate is driven to move backward by the side wall of the tail end of the actuator housing, which in turn pushes the transmission tube, sliding seat, and reset push button to move backward, so that the second end of the firing interlock block tilts upward, releasing the firing interlock block from locking the transmission rack; the ejector button is driven to slide forward along the ejector button mounting groove by the inner wall of the connecting tube, and after the positioning part rotates, the limiting protrusion disengages from the arc-shaped limiting tail, releasing the limitation on the axial drive assembly.

[0021] B. Based on the location of the tissue to be removed, the articulated actuator is placed into the human body. The rotating housing is rotated, causing the rotating housing to drive the sleeve, connecting piece, and connecting tube to rotate around the push rod. The connecting tube drives the actuator housing, actuator sleeve, axial drive assembly, connecting seat assembly, staple cartridge seat, and anvil seat to rotate, so that the tissue to be removed is placed between the staple cartridge seat and the anvil seat.

[0022] C. Depending on the size of the tissue to be removed, rotate the knob on the top of the rotating housing. The transmission gear and rack work together to move the steering plate back and forth, which in turn moves the connecting plate and steering pull plate back and forth, causing the connecting seat assembly, staple cartridge seat, and anvil seat to swing around the fourth pivot, so that the tissue to be removed is completely placed on the opposite side of the cutting blade groove of the staple cartridge seat.

[0023] D. Pressing the safety pin causes the safety block to be pressed down, and the transmission rack is in the firing state. Continuously pull the trigger according to the required length of tissue to be removed. The rack and pinion drive pushes the transmission rack forward, causing the push rod to move forward within the sleeve assembly and actuator housing. This, in turn, drives the axial drive assembly consisting of the cutting blade and pusher to move forward within the cutting blade groove. The cutting blade removes the tissue. The pressing pin and pusher fixing plate cause the anvil and staple cartridge seat to close, thus closing the anastomotic staples in the staple cartridge seat.

[0024] E. When the reset pin is pulled back, the rack connecting piece descends, the rack transmission component is pressed down, causing the rack transmission component to disengage from the wedge teeth, and the reset pin drives the transmission rack, push rod, push tube, and axial drive assembly to pull back, and the pin cartridge seat and pin stop seat open again.

[0025] F. Pressing down the component release button causes the longitudinal limit support of the positioning plate to insert into the push rod slot, limiting the push rod. Rotating the articulated actuator causes the actuator housing to disengage from the connecting tube, the push rod to disengage from the push tube, and releases the connection between the connecting piece and the steering pull piece, completing the separation of the articulated actuator from the rotary handle.

[0026] Technical effects of the invention: (1) Compared with the prior art, the drive mechanism of the anastomosis device of the present invention uses a combination of trigger and transmission rack, which can accurately control the pushing speed and accuracy of the push rod; (2) The rotating component uses a combination of transmission gear and rack, which converts the rotational motion into linear motion, which is convenient for control and operation; (3) The setting of the safety pin can prevent misoperation, and the first V-groove and second V-groove of the safety block make the operation of the safety pin smooth; (4) The setting of the reset pin can conveniently pull back the push rod; (5) The combination of the firing interlock block and the anti-rotation plate can prevent the joint-type actuator from being inserted into the front drive of the rotating handle. (6) The sleeve, connecting pipe and transmission pipe are set so that the sleeve, connecting pipe and articulated actuator can rotate 360 ​​degrees, while not affecting the movement of the sliding seat and firing interlock block. The structure is ingenious, the size is small and it is easy to assemble. (7) The push rod is axially limited by the push rod slot and the longitudinal limit support, which can prevent the push rod from coming out when separating the articulated actuator and the rotating handle. (8) The limit protrusion and the arc-shaped limit tail cooperate to prevent the articulated actuator from driving the axial drive assembly forward before inserting into the rotating handle. (9) The eject button and the arc-shaped positioning part cooperate to easily separate the axial drive assembly from the limit protrusion. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings:

[0028] Figure 1 This is a three-dimensional structural schematic diagram of the rotating handle according to Embodiment 1 of the present invention;

[0029] Figure 2 This is an exploded structural diagram of the handle housing in Embodiment 1 of the present invention;

[0030] Figure 3 This is an exploded structural diagram of the transmission rack, trigger, safety pin, connecting piece, and reset pin after assembly in Embodiment 1 of the present invention;

[0031] Figure 4 This is an exploded structural diagram of the transmission rack, connecting piece, and reset pin after assembly in Embodiment 1 of the present invention;

[0032] Figure 5 This is a three-dimensional structural schematic diagram of the transmission rack in Embodiment 1 of the present invention;

[0033] Figure 6 This is a three-dimensional structural schematic diagram of the connecting piece in Embodiment 1 of the present invention;

[0034] Figure 7 This is a three-dimensional structural diagram of the safety pin in Embodiment 1 of the present invention;

[0035] Figure 8 This is a three-dimensional structural diagram of the safety block in Embodiment 1 of the present invention;

[0036] Figure 9 This is an exploded structural diagram of the transmission rack, firing interlock block, safety pin, and safety block after assembly in Embodiment 1 of the present invention;

[0037] Figure 10 This is a three-dimensional structural diagram of the firing interlock block in Embodiment 1 of the present invention;

[0038] Figure 11 This is an exploded structural diagram of the rotating component and the toggle component after assembly in Embodiment 1 of the present invention;

[0039] Figure 12 This is a three-dimensional structural diagram of the sliding seat in Embodiment 1 of the present invention;

[0040] Figure 13 This is an exploded structural diagram of the sleeve assembly and connecting piece after assembly in Embodiment 1 of the present invention;

[0041] Figure 14 A three-dimensional structural diagram of the fixing ring in Embodiment 1 of the present invention;

[0042] Figure 15 This is an exploded view of the assembled structure of the sliding block, anti-rotation plate, positioning plate, positioning plate support spring, component exit button, and bayonet spring in Embodiment 1 of the invention.

[0043] Figure 16 This is a three-dimensional structural diagram of the connecting pipe in Embodiment 1 of the invention;

[0044] Figure 17 This is a three-dimensional structural schematic diagram of the push rod in Embodiment 1 of the invention;

[0045] Figure 18 This is a three-dimensional structural schematic diagram of the articulated actuator in Embodiment 1 of the present invention;

[0046] Figure 19 This is a schematic diagram of the disassembled structure of the articulated actuator in Embodiment 1 of the present invention;

[0047] Figure 20 This is a three-dimensional structural schematic diagram of the connector assembly in Embodiment 1 of the present invention;

[0048] Figure 21 This is an exploded structural diagram of the assembly of the execution housing, execution sleeve, axial drive assembly, steering pull plate, ejector button, and positioning component in Embodiment 1 of the present invention;

[0049] Figure 22 This is an exploded structural diagram of the connecting rod cover plate, ejector button, and positioning component after assembly in Embodiment 1 of the present invention;

[0050] Figure 23 This is an exploded structural diagram of the axial drive assembly and steering pull plate in Embodiment 1 of the present invention.

[0051] In the figure: handle housing 1, left handle housing 11, right handle housing 12, through groove 13, safety pin through hole 14;

[0052] Rotating housing 2, upper rotating housing 21, mounting hole 211, limiting ring platform 212, lower rotating housing 22, sliding groove 221, sliding seat 23, sliding plane 231, sliding protrusion 232, through hole 233;

[0053] Sleeve assembly 3, sleeve 31, connecting pipe 32, sliding plane 321, annular limiting boss 322, insertion groove 323;

[0054] Connecting pipe mounting base 33, fixing ring 34, isolation brace 341, first limiting groove 342, second limiting groove 343;

[0055] Transmission tube 35, sliding block 36, anti-rotation plate 37, positioning plate 38, longitudinal limit support 381, positioning plate support spring 382, ​​component exit button 39, bayonet spring 391, wedge-shaped extrusion part 392, pushing protrusion 393;

[0056] Toggle assembly 4, toggle 41, drive shaft 42, drive gear 43, rack 44, steering plate 45, wave spring 46;

[0057] Trigger 5, first pivot 51, second pivot 52, rack and pinion drive 53;

[0058] Transmission rack 54, wedge tooth 541, guide protrusion 542, mounting groove 543, push rod slot 544, arc chamfered part 545, first slot 546, tension spring 547, connecting piece reset part 548, limit support 549;

[0059] Rack and pinion connecting piece 55, inclined slide groove 551, second slot 552;

[0060] Reset pin 56, safety pin 57, annular limit block 571, rhomboid pressing block 572;

[0061] Safety block 58, limiting protrusion 581, first V-groove 582, second V-groove 583, wedge-shaped guide part 584, safety block torsion spring 585;

[0062] 59 is a trigger interlock block, 591 is a first end, 592 is a second end, 593 is a third end, 594 is a third pivot, 595 is an interlock block torsion spring, 596 is a reset push button, 597 is a push button spring, and 598 is a wedge-shaped blocking part.

[0063] Push rod 6, push rod slot 61, annular limiting platform 62, push rod plug 63;

[0064] Connecting piece 7, rectangular mounting groove 71, connecting groove 72;

[0065] The joint-type actuator 8, actuator sleeve 80, pin seat 81, pin cartridge seat 82, connecting seat assembly 83, upper connecting seat 831, lower connecting seat 832, fourth pivot 833, fifth pivot 834, and rivet 835;

[0066] Actuating housing 84, connecting rod cover plate 841, nail cartridge connecting rod 842, ejector button mounting groove 843, mounting component sliding groove 844, limit slot 845, annular push boss 846, axial limit boss 847, pull tab sliding groove 848.

[0067] Ejection button 85, oblique ejection groove 851, positioning component 852, positioning component limiting protrusion 853, positioning component sliding protrusion 854;

[0068] Axial drive assembly 86, cutting blade 861, left pusher 862, right pusher 863, push tube 864, lower pressure pin 865, pusher fixing piece 866, arc-shaped limit tail 867;

[0069] Steering pull tab 87, connecting hole 871, pull hook 872. Implementation

[0070] Example 1

[0071] A stapler with a rotating handle includes a rotating housing, such as Figure 1 As shown, the rotating housing includes a handle housing 1, a rotating assembly, a sleeve assembly 3, a toggle assembly 4, a push rod 6, and a connecting piece 7, as follows. Figure 2 The handle housing 1 shown is formed by the interlocking and fixing of a left handle housing 11 and a right handle housing 12; the handle housing 1 is equipped with a drive mechanism, which consists of four parts: a power unit, a reset device, a safety device, and an interlocking device, as shown below. Figure 3As shown, the power unit includes a transmission rack 54 that slides with the handle housing 1, a rack and pinion drive 53, and a trigger 5 that pivotally engages with the handle housing 1. Multiple wedge-shaped teeth 541 are arranged below the transmission rack 54 along its sliding direction. The middle part of the trigger 5 is pivotally engaged with the handle housing 1 via a first pivot 51. The front end of the trigger 5 is located outside the handle housing 1. A trigger torsion spring is provided between the trigger 5 and the handle housing 1 to drive the trigger 5 to reset. The tail end of the rack and pinion drive 53 is pivotally engaged with the tail end of the trigger 5 via a second pivot 52. The front end of the trigger 5 is provided with a locking part that can be inserted between adjacent wedge teeth. A transmission torsion spring is provided between the locking part and the tail end of the trigger 5 to support the locking part so that the locking part extends obliquely upward. When the trigger 5 is in the initial state, the locking part of the rack transmission 53 is placed below the wedge teeth 541. When the front end of the trigger 5 is pulled obliquely backward, the tail end of the trigger 5 tilts upward, causing the rack transmission 53 to tilt upward. The locking part of the rack transmission 53 is inserted between adjacent wedge teeth 541. When the trigger 5 is rotated further, the rack transmission 53 drives the transmission rack 54 to slide forward in the handle housing 1.

[0072] The front end of the transmission rack 54 is provided with a push rod slot 544. The front end and both sides of the push rod slot 544 are open, and the diameter of the front outlet of the push rod slot 544 is smaller than the diameter of the rear end, making the push rod slot 544 a bottleneck type. The tail end of the push rod 6 is provided with an annular limiting platform 62. The diameter of the annular limiting platform 62 is larger than the diameter of the front outlet of the push rod slot 544 and smaller than the diameter of the rear end of the push rod slot 544. This allows the push rod 6 to rotate within the push rod slot 544 after the tail end of the push rod 6 is inserted into the push rod slot 544 through the openings on both sides. At the same time, since the diameter of the annular limiting platform 62 is larger than the diameter of the front outlet of the push rod slot 544, the push rod 6 can be axially limited.

[0073] like Figures 4 to 6As shown, the reset device includes a reset pin 56, a rack connecting piece 55, a tension spring 547, and a connecting piece reset member 548. A guide protrusion 542 is provided at each end of the side wall of the transmission rack 54. An oblique groove 551, adapted to the guide protrusion 542, is provided at both ends of the rack connecting piece 55. The guide protrusion 542 is inserted into the oblique groove 551 of the rack connecting piece 55. A mounting groove 543 is provided at the upper part of the tail end of the transmission rack 54 along the sliding direction of the transmission rack 54. The tension spring 57 and the connecting piece reset member 548 are placed in the mounting groove 543. The front end of the tension spring 547 is fixedly connected to the end wall of the mounting groove 543, and the tail end of the tension spring 547 is connected to the front end of the connecting piece reset member 548. A through groove 13 is provided on the handle housing 1 along the sliding direction of the transmission rack 54. A first slot 546 is provided at the tail end of the transmission rack 54. The tail end of the connecting piece 55 is provided with a through slot 552, and the tail end of the connecting piece reset piece 548 is provided with a third slot. The reset pin 56 passes through the through slot 13, the first slot 546, the second slot 552, and the third slot, so that the tension spring 547 and the connecting piece reset piece 548 support the reset pin 56, so that the rack connecting piece 55 is suspended on one side of the transmission rack 54. The width of the snap-fit ​​part is greater than the width of the transmission rack 54, so that the rack connecting piece 55 is positioned above the snap-fit ​​part. When the reset pin 56 is pulled back, it drives the rack connecting piece 55 to move. The rack connecting piece 55 moves obliquely downward under the cooperation of the oblique slide groove 551 and the guide protrusion 542. The rack connecting piece 55 presses down on the snap-fit ​​part, so that the rack transmission piece 53 disengages from the adjacent wedge teeth 541 of the transmission rack 54, thereby realizing the pull-back reset of the transmission rack 54.

[0074] like Figure 3 As shown, the safety device includes a safety pin 57, a safety block 58, a safety block torsion spring 585, and a button spring. The front end of the safety block 58 is fixedly connected to the handle housing 1 via the safety block torsion spring 585 so that the safety block 58 is positioned at the front end of the transmission rack 54. Figure 8 As shown, the rear end face of the safety block 58 is symmetrically provided with limiting protrusions 581. The inner surfaces of the two limiting protrusions 581 are inclined to form a first V-groove 582 between the two limiting protrusions 581. A wedge-shaped guide portion 584 is provided at the top of the rear end face of the safety block 58, and an arc-shaped chamfer portion 545 is provided on the lower side of the front end of the transmission rack 54. The top ends of the limiting protrusions 581 are respectively provided with second V-grooves 583, and the bottom end of each second V-groove 583 is higher than the bottom end of the first V-groove 582. Figure 7As shown, the safety pin 57 is cylindrical, with an annular limiting block 571 fixedly installed in the middle. A rhomboid pressing block 572, matching the shape of the first V-groove 582, is fixedly installed on one side of the annular limiting block 571. A safety pin through hole 14, suitable for the end of the safety pin 57 to extend out, is provided on the handle housing 1. Button springs are respectively fitted at both ends of the safety pin 57, so that the annular limiting block 571 and the inner wall of the handle housing 1 are supported by the button springs. During assembly, the safety pin 57 is positioned on the transmission gear. On the lower front end of the rack 54, the diamond-shaped pressing block 572 is placed in the first V-groove 582, and the top of the safety block 58 blocks and limits the transmission rack 54. When the safety pin 57 is squeezed, the diamond-shaped pressing block 572 and the inclined inner surface of the limiting protrusion 581 cooperate to drive the safety block 58 to move down to disengage from the transmission rack 54, thereby releasing the obstruction to the transmission rack 54. When the diamond-shaped pressing block 572 disengages from the first V-groove 582 and enters the second V-groove 583, the safety block 58 remains in the pressing state.

[0075] like Figures 9 to 10 As shown, the interlocking device includes a firing interlock block 59, an interlock block torsion spring 595, and a reset push button 596. The firing interlock block 59 is arranged in a transverse V-shape at the front end of the transmission rack 54. The first end 591 of the firing interlock block 59 is pivotally connected to the handle housing 1 via a third pivot 594. The second end 592 of the firing interlock block 59 is provided with a wedge-shaped blocking part 598. A limiting support 549 adapted to the wedge-shaped blocking part 598 is provided on the upper side of the front end of the transmission rack 54, so that when the firing interlock block 59 is placed flat, the wedge-shaped blocking part 598 is positioned as follows: 8. The limiting support 549 of the transmission rack 54 is pressed against it; one end of the reset push button 596 is engaged with the front end of the third end 593 of the firing interlock block 59, and a push button spring 597 is provided between the reset push button 596 and the handle housing 1 in the sliding direction so that when the reset push button 596 slides backward, it can push the firing interlock block 59 to rotate around the third pivot 594, and the wedge-shaped blocking part 598 disengages from the limiting support 549 of the transmission rack 54; the interlock block torsion spring 595 is sleeved on the third pivot 594 and is used to drive the firing interlock block 59 to reset.

[0076] like Figure 11 As shown, the rotating assembly includes an upper rotating housing 21, a lower rotating housing 22, and a sliding seat 23. Semi-circular grooves are provided at the lower part of the upper rotating housing 21 and the upper part of the lower rotating housing 22. When the upper rotating housing 21 and the lower rotating housing 22 are fastened together, a rotating housing 2 is formed, creating a through circular groove at the center of the rotating housing 2. The tail end of the rotating housing 2 is rotatably engaged with the front end of the handle housing 1. A sliding groove 221 is provided axially on the bottom wall of the lower rotating housing 22. Figure 12As shown, the bottom end of the sliding seat 23 is provided with a sliding protrusion 232 that slides in cooperation with the sliding groove 221, so that the sliding seat 23 can be slidably disposed in the rotating housing 2. The center of the sliding seat 23 is provided with a through hole 233 along the axial direction. The tail end of the sliding seat 23 is placed at the front end of the reset push button 596. The tail end of the push rod 6 passes through the sliding seat 23 and is inserted into the push rod slot 544 at the front end of the transmission rack 54.

[0077] like Figure 11 As shown, the toggle assembly 4 includes a toggle 41, a drive shaft 42, a drive gear 43, a rack 44, and a steering plate 45. A mounting hole 211 is provided through the upper rotating housing 21. A limiting ring 212 is provided in the middle of the mounting hole 211. The bottom end of the toggle 41 is rotatably mounted in the mounting hole 211 and is supported and limited by the limiting ring 212. Meshing limiting teeth are provided on the bottom end of the toggle 41 and the upper end face of the limiting ring 212, allowing the toggle 41 to be limited when rotated. The bottom end of the drive shaft 42 is fixedly connected to the drive gear 4 via a turntable. The upper end face of the turntable and the lower end face of the limiting ring 212 are connected... A wave spring 46 is provided between the surfaces. The top end of the drive shaft 42 passes through the wave spring 46 and is fixedly connected to the knob 41. A sliding plane 231 is provided on the side wall of the sliding seat 23. The lower part of the steering piece 45 is slidably engaged with the sliding plane 231 of the sliding seat 23. A rack 44 is fixedly provided on the upper part of the steering piece 45. The rack 44 meshes with the transmission gear 43 so that when the knob 41 is rotated, it can drive the steering piece 45 to slide back and forth along the sliding seat 23. A connecting groove 72 is provided at the tail end of the connecting piece 7. The front end of the steering piece 45 is inserted into the connecting groove 72 so that the steering piece 45 and the tail end of the connecting piece 7 are engaged in transmission.

[0078] The bushing assembly 3 includes a follow-up rotation device, a transmission device, and an assembly exit device, such as... Figure 13 As shown, the rotating device includes a sleeve 31, a connecting pipe 32, a connecting pipe mounting base 33, and a fixing ring 34. The connecting pipe mounting base 33 has a through mounting hole along the axial direction. The tail end of the connecting pipe 32 is inserted into the mounting hole. The side walls of the connecting pipe mounting base 33 and the connecting pipe 32 are provided with sliding surfaces 321, such as... Figure 14As shown, an isolation support 341 is provided inside the fixed ring 34, forming a first limiting groove 342 and a second limiting groove 343 inside the fixed ring 34. The first limiting groove 342 of the fixed ring 34 is sleeved on the front end of the connecting pipe mounting seat 33. The sliding plane of the connecting pipe mounting seat 33 is set close to the isolation support 341. The tail end of the connecting piece 7 passes through the second limiting groove 343 and engages with the steering piece 45. The fixed ring 34 is fixedly connected to the inner wall of the tail end of the sleeve 31, so that the connecting piece 7 is placed between the inner wall of the sleeve 31 and the outer wall of the connecting pipe 32. The outer wall of the tail end of the sleeve 31 is fixedly connected to the front end of the rotating housing 2, so that when the rotating housing 2 rotates, it can drive the sleeve 31, the fixed ring 34, the connecting pipe mounting seat 33, and the connecting pipe 32 to rotate synchronously. When the steering piece 45 slides, it can drive the connecting piece 7 to move back and forth along the sliding plane 321.

[0079] like Figure 15 As shown, the transmission device includes a transmission pipe 35, a sliding block 36, and an anti-rotation plate 37. The transmission pipe 35 is sleeved inside the connecting pipe 32. The push rod 6 passes through the transmission pipe 35, and the outer diameter of the transmission pipe 35 is smaller than the inner diameter of the mounting seat through hole, so that the transmission pipe 35 can pass through the mounting seat through hole and contact the sliding seat 23. The front end of the push rod 6 is provided with an anti-rotation plate sliding surface, which extends to the front end of the transmission pipe 35. The connecting pipe 32 is provided with a downward pressing groove, and the anti-rotation plate 37 slides on the anti-rotation plate sliding surface. The sliding block 36 is placed in the downward sliding groove and fixedly connected to the anti-rotation plate 37. When the anti-rotation plate 37 slides along the anti-rotation plate sliding plane to the front end of the transmission tube 35, the top surface of the sliding block 36 contacts the inner wall of the sleeve 31, squeezing the anti-rotation plate 37 to fit tightly against the anti-rotation plate sliding plane. The tail end of the anti-rotation plate 37 contacts the front end face of the transmission tube 35, which is used to push the transmission tube 35 through the connecting tube mounting seat 33, thereby pushing the sliding seat 23 and the reset push button 596 to move backward to push the trigger interlock block 59 to rotate and unlock the interlock device.

[0080] like Figure 16 As shown, an annular limiting boss 322 is provided on the inner wall of the front end of the connecting pipe 32. The annular limiting boss 322 is provided with multiple insertion grooves 323 along the axial direction. The front end of the anti-rotation piece 45 passes through the insertion groove 323 and is placed at the front of the inner wall of the connecting pipe 32.

[0081] The component ejection device includes a positioning plate 38, a positioning plate support spring 382, ​​a component ejection button 39, and a bayonet spring 391. The positioning plate 38 includes a transverse plate and a longitudinal limiting support 381 located at the front end of the transverse plate. The positioning plate support spring 382 is provided between the inner side of the transverse plate and the push rod 6 to support the positioning plate 38. The outer side of the tail end of the transverse plate is fixedly connected to the inner wall of the sleeve 31. The push rod 6 is provided with a push rod slot 61. The longitudinal limiting support 382 of the positioning plate 38 is placed at the push rod slot 62 so that when the front end of the positioning plate 38 is squeezed, the longitudinal limiting support 381 is radially engaged into the push rod slot 62 to limit the axial displacement of the push rod 6. The connecting pipe 32 is provided with... The eject button slide has a through eject button mounting groove on the sleeve 31. The front end of the component eject button 39 is provided with a push protrusion 393, which extends out of the eject button mounting groove. A bayonet spring 391 is placed between the component eject button 39 and the side wall of the eject button slide to buffer the component eject button 39 and drive the component eject button 39 to reset. The tail end of the component eject button 39 is provided with a wedge-shaped pressing part 392, and the front end of the positioning plate 38 is provided with an arc-shaped chamfer. The wedge-shaped pressing part 392 is located close to the front end of the arc-shaped chamfer so that when the component eject button 39 is pushed backward, it can press the front end of the positioning plate 38 to axially limit the push rod 6.

[0082] like Figure 17 As shown, the front end of the push rod 6 is provided with a push rod plug 63, and the push rod plug 63 extends out of the connecting tube 32. The front end of the connecting piece 7 is provided with a rectangular hanging groove 71.

[0083] The stapler also includes an articulated actuator 8 for performing the cutting and anastomosis actions, such as Figures 18 to 19 As shown, the articulated actuator 8 includes a staple cartridge device, a connecting device, a protective device, and an axial drive assembly 86; the staple cartridge device includes a staple cartridge seat 82 and a staple abutment seat 81, the staple cartridge seat 82 is provided with a staple and a staple pusher, and the tail end of the staple abutment seat 81 is pivotally connected to the staple cartridge seat 82.

[0084] like Figures 20 to 21As shown, the connecting device includes an upper connecting seat 831, a lower connecting seat 832, a steering pull plate 87, an actuating sleeve 80, a staple cartridge connecting rod 842, and a connecting rod cover plate 841. The staple cartridge connecting rod 842 and the connecting rod cover plate 841 are fastened together to form a hollow actuating housing 84. This actuating housing 84 is fitted inside the actuating sleeve 80. The tail end of the actuating housing 84 protrudes for insertion into the connecting tube 32. The tail end of the connecting rod cover plate 841 is provided with an annular pushing boss 846 and an axial limiting boss 847. When the tail end of the actuating housing 84 is inserted into the front end of the connecting tube 32, the axial limiting boss 847 enters the insertion groove 323 along the insertion groove and reaches behind the annular limiting boss. After rotation, the annular limiting boss 322 and the axial limiting boss 847 limit the actuating housing 84. One side of the actuating housing 84 formed by the staple cartridge connecting rod 842 and the connecting rod cover plate 841 is provided with a pull plate groove suitable for the sliding of the steering pull plate 87. 848, the tail end of the steering pull plate 87 passes through the sleeve 31 and engages with the front end of the connecting plate 7; the upper connecting seat 831 and the lower connecting seat 832 are fastened together to form a connecting seat assembly 83, and the tail end of the pin cartridge seat 82 is fixedly connected to the connecting seat assembly 83 by a rivet 835; the upper and lower ends of the connecting seat assembly 83 are pivotally engaged with the actuating sleeve 80 via a fourth pivot 833, a fifth pivot 834 is provided on one side of the connecting seat assembly 83, the fifth pivot 834 is parallel to the fourth pivot 833, the front end of the steering pull plate 87 is provided with a connecting hole 871, the connecting hole 871 is sleeved on the fifth pivot 834, the tail end of the steering pull plate 87 is provided with a hook 872 that engages with the rectangular hook groove 71 of the connecting plate 7, so that when the steering pull plate 87 moves back and forth, it can drive the connecting seat assembly 83 to swing left and right around the fourth pivot 833; the middle part of the connecting seat assembly 83 is provided with a through channel suitable for the axial drive assembly 86 to pass through, such as Figure 23As shown, the axial drive assembly 86 includes a push tube 864, a stacked left pusher 862, a cutting blade 861, and a right pusher 863. The axial drive assembly 86 is slidably fitted with the execution housing 84. The push tube 864 is fixedly disposed at the tail end of the axial drive assembly 86. When the front end of the push rod 6 is inserted into the execution housing 84, it engages with the push tube 864 to drive the axial drive assembly 86 to move. The front end of the axial drive assembly 86 extends out of the execution housing 84 and passes through the connecting seat assembly 83. A lower pressure pin 865 is fixedly disposed on the upper part of the front end of the axial drive assembly 86. A pusher fixing plate 866 is fixedly connected to the staple cartridge seat 82. The upper end face of the pusher fixing plate 866 is slidably engaged with the lower end face of the staple cartridge seat 82. The lower pressure pin 865 is slidably engaged with the upper end face of the staple seat 81. The staple cartridge seat 82 is provided with a cutting blade groove at the center, which is suitable for the axial drive assembly 86 to pass through. When the push rod 6 pushes the axial drive assembly 86 to move forward in the cutting blade groove, the lower pressure pin 865 and the pusher fixing plate 866 drive the staple seat 81 to close with the staple cartridge seat 82. The pusher fixing plate 866 pushes the pusher plate to move, so that the staples in the staple cartridge seat 82 are squeezed out and cooperate with the staple seat 81 to complete the suture.

[0085] like Figure 22 As shown, the protective device includes an ejector button 85 and a positioning member 852. An ejector button mounting groove 843 is axially provided on the side wall of the connecting rod cover plate 841. A through-hole limiting slot 845 is provided on one side of the ejector button mounting groove 843, and a mounting member sliding groove 844 is provided on the other side. An oblique ejector groove 851 is provided on the ejector button 85. The positioning member 852 is arc-shaped. A positioning member sliding protrusion 854 that slides with the oblique ejector groove 851 is provided in the middle of the arc-shaped positioning member 852. A positioning member limiting protrusion 853 is provided at one end of the arc-shaped positioning member 852. An arc-shaped limiting tail 867 is provided at the tail end of the axial drive assembly 86. During assembly, the ejector button 85 is placed in the ejector button mounting groove 843, and the tail end of the ejector button 85 extends out of the actuator sleeve 80. The sliding protrusion 854 of the positioning member 852 is inserted into the inclined ejector groove 851. The limiting protrusion 853 of the positioning member 852 passes through the limiting slot 845 and is placed at the front end of the arc-shaped limiting tail 867 to limit the axial drive assembly 86. When the ejector button 85 is pushed to slide along the ejector button mounting groove 843, the inclined ejector groove 851 and the sliding protrusion 854 cooperate to make the positioning member 852 rotate. The limiting protrusion 853 disengages from the arc-shaped limiting tail 867, and the positioning member 852 no longer limits and protects the axial drive assembly 86.

[0086] Example 2

[0087] A method of using a stapler includes the following steps:

[0088] A. Connect the articulated actuator 8 to the rotary handle, so that the tail end of the actuator housing 84 is inserted into the front end of the connecting tube 32, the front end of the connecting piece 7 is engaged with the tail end of the steering pull piece 87, the front end of the push rod 6 extends into the actuator housing 84 and is engaged with the push rod plug 63 of the push tube 6, and the tail end of the actuator housing 84 is engaged with the annular limiting boss 322 on the inner wall of the connecting tube 32. The annular pushing boss 846 at the tail end of the actuator housing 84 drives the anti-rotation piece 47 to move backward. This causes the transmission tube 35, sliding seat 23, and reset push button to move backward 596, causing the second end 592 of the firing interlock block 59 to tilt upward, releasing the locking of the firing interlock block 59 to the transmission rack 54; the annular limiting boss 322 on the inner wall of the connecting tube 32 drives the ejector button 85 to slide forward along the ejector button mounting groove 843, and after the positioning member 852 rotates, the positioning member limiting protrusion 853 disengages from the arc-shaped limiting tail 867, releasing the limitation on the axial drive assembly 86.

[0089] B. Based on the location of the tissue to be removed, the articulated actuator 8 is placed into the human body. The rotating housing 2 is rotated, causing the rotating housing 2 to drive the sleeve 31, connecting piece 7, and connecting tube 32 to rotate around the push rod 6. The connecting tube 32 drives the actuator housing 84, actuator sleeve 80, axial drive assembly 86, connecting seat assembly 83, staple cartridge seat 82, and anvil seat 81 to rotate, so that the tissue to be removed is placed between the staple cartridge seat 82 and the anvil seat 81.

[0090] C. Depending on the size of the tissue to be removed, rotate the knob 41 on the top of the rotating housing 2. The transmission gear 43 and rack 44 work together to move the steering piece 45 back and forth, which in turn moves the connecting piece 7 and the steering pull piece 87 back and forth, causing the connecting seat assembly 83, the staple cartridge seat 82, and the staple seat 81 to swing around the fourth pivot 833, so that the tissue to be removed is completely placed on the opposite side of the cutting blade groove of the staple cartridge seat 82.

[0091] D. Pressing the safety pin 57 causes the safety block 58 to be pressed down, and the transmission rack 54 is in a firing state. Continuously pull the trigger 5 according to the required length of tissue to be removed. The rack and pinion transmission component 53 pushes the transmission rack 54 forward, driving the push rod 6 to move forward within the sleeve assembly 3 and the actuator housing 84, thereby driving the axial drive assembly 86 to move forward within the cutting blade groove. The cutting blade 861 removes the tissue. The pressing pin 865 and the push blade fixing piece 866 drive the anvil seat 81 and the staple cartridge seat 82 to close, causing the anastomotic staples in the staple cartridge seat 82 to close.

[0092] E. When the reset pin 56 is pulled back, the rack connecting piece 55 descends, the rack transmission component 53 is pressed down, causing the rack transmission component 53 to disengage from the wedge tooth 541. The reset pin 56 drives the transmission rack 54, push rod 6, push tube 864, and axial drive assembly 86 to pull back, and the pin cartridge seat 82 and pin stop seat 81 open again.

[0093] F. Pressing down the component exit button 39 causes the longitudinal limiting support 382 of the positioning plate 38 to insert into the push rod slot 61, limiting the push rod 6. Rotating the joint type actuator 8 causes the actuator housing 84 to disengage from the connecting tube 32, the push rod 6 to disengage from the push tube 864, and releases the fastening between the connecting piece 7 and the steering pull piece 87, completing the separation of the joint type actuator 8 from the rotating handle.

[0094] Obviously, the above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, these obvious variations or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A stapler comprising a rotary handle, the rotary handle comprising: Handle shell, drive mechanism is arranged in the handle shell; Rotary assembly, rotatably mounted at the front end of the handle shell; Sleeve assembly, the rear end is connected with the rotary assembly; Push rod and connecting piece, slidingly matched with the sleeve assembly; Dial knob assembly, the tail end of the connecting piece is drivingly matched with the dial knob assembly, so that the dial knob assembly rotates to pull the connecting piece to slide in the sleeve assembly; The drive mechanism comprises a transmission rack slidingly matched with the handle shell, a rack transmission member, and a trigger pivotally matched with the handle shell, the front end of the transmission rack is insertedly matched with the tail end of the push rod, so that the push rod is rotatably arranged, and the transmission rack moves to drive the push rod to move, a plurality of wedge-shaped teeth are arranged below the transmission rack; the middle part of the trigger is pivotally matched with the handle shell, the front end of the trigger is arranged outside the handle shell, a trigger torsional spring is arranged between the trigger and the handle shell for driving the trigger to reset; the tail end of the rack transmission member is pivotally matched with the tail end of the trigger, the front end of the rack transmission member is provided with a clamping portion which can be inserted between adjacent wedge-shaped teeth, and a transmission member torsional spring is arranged between the clamping portion and the tail end of the trigger; The drive mechanism further comprises a reset pin, a rack connecting piece, a tension spring, and a connecting piece reset member, a guide protrusion is arranged at each end of the side wall of the transmission rack, a slanting sliding groove which is matched with the guide protrusion is arranged at each end of the rack connecting piece, the guide protrusion is inserted into the slanting sliding groove of the rack connecting piece, an installation groove is arranged on the upper part of the tail end of the transmission rack along the sliding direction of the transmission rack, the tension spring and the connecting piece reset member are arranged in the installation groove, the front end of the tension spring is fixedly connected with the end wall of the installation groove, and the tail end of the tension spring is connected with the front end of the connecting piece reset member; a through groove is arranged on the handle shell along the sliding direction of the transmission rack, a first insertion groove is arranged at the tail end of the transmission rack, a second insertion groove is arranged at the tail end of the rack connecting piece, a third insertion groove is arranged at the tail end of the connecting piece reset member, and the reset pin passes through the through groove, the first insertion groove, the second insertion groove, and the third insertion groove, so that the tension spring and the connecting piece reset member support the reset pin, the rack connecting piece is suspended on one side of the transmission rack, the width of the clamping portion is greater than the width of the transmission rack, so that the rack connecting piece is arranged above the clamping portion; the reset pin moves to drive the rack connecting piece to move, the rack connecting piece moves to the lower left under the cooperation of the slanting sliding groove and the guide protrusion, and the rack connecting piece presses the clamping portion to make the rack transmission member disengage between the adjacent wedge-shaped teeth of the transmission rack; The driving mechanism further comprises a safety pin, a safety block, a safety block torsion spring and a button spring, the front end of the safety block is fixedly connected with the handle shell through the safety block torsion spring to place the safety block at the front end of the transmission rack, the rear end of the safety block is symmetrically provided with limiting protrusions, the inner side surfaces of the two limiting protrusions are obliquely arranged to form a first V-shaped groove between the two limiting protrusions, the safety pin is in a columnar shape, a ring-shaped limiting block is fixedly arranged at the middle part of the safety pin, a rhombic pressing block which is matched with the shape of the first V-shaped groove is fixedly arranged at one side of the ring-shaped limiting block, a safety pin through hole is arranged on the handle shell to extend the end of the safety pin, the two ends of the safety pin are respectively sleeved with the button spring, the ring-shaped limiting block is supported by the button spring between the inner wall of the handle shell, the safety pin is arranged at the lower side of the front end of the transmission rack during assembly, the rhombic pressing block is arranged in the first V-shaped groove, and the top end of the safety block blocks and limits the transmission rack; when the safety pin is pressed, the rhombic pressing block cooperates with the oblique inner side surfaces of the limiting protrusions to drive the safety block to move downward to separate from the transmission rack. A wedge-shaped guide part is arranged at the top of the rear end surface of the safety block, and an arc-shaped chamfer part is arranged at the lower side of the front end of the transmission rack, so that the resistance between the safety block and the transmission rack can be reduced when the safety block is pressed down; a second V-shaped groove is arranged at the top end of the limiting protrusion, and the bottom end of the second V-shaped groove is higher than the bottom end of the first V-shaped groove. The driving mechanism further comprises a firing interlocking block, an interlocking block torsion spring and a reset push button, the firing interlocking block is arranged at the front end of the transmission rack in a transverse V-shaped manner, the first end part of the firing interlocking block is pivotally connected with the handle shell through a third pivot, the second end part of the firing interlocking block is provided with a wedge-shaped blocking part, the front end of the transmission rack is provided with a limiting support which is matched with the wedge-shaped blocking part, so that the wedge-shaped blocking part abuts against the limiting support of the transmission rack when the firing interlocking block is placed flat; one end of the reset push button is in transmission cooperation with the sliding seat, the other end of the reset push button is in transmission cooperation with the third end part of the firing interlocking block, so that the sliding seat can push the firing interlocking block to rotate around the third pivot when the sliding seat slides backward, and the wedge-shaped blocking part separates from the limiting support of the transmission rack; the interlocking block torsion spring is sleeved on the third pivot.

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