CN116211369A - Linear cutting anastomat and application method thereof - Google Patents

Abstract

The invention relates to a linear cutting anastomat and a use method thereof, wherein the linear cutting anastomat comprises a nail bin assembly, a closed driving mechanism, a power transmission mechanism, a shell, a controller, a power source and a nail height adjusting assembly, wherein the power source and the nail height adjusting assembly are electrically connected with the controller; the nail bin assembly comprises a nail bin bracket and a nail anvil bracket; the power source is connected with the power transmission mechanism, and the power transmission mechanism is in selective driving connection with the closed driving mechanism; when the power transmission mechanism is in driving connection with the closing driving mechanism and the power source transmits power to the closing driving mechanism through the power transmission mechanism, the nail bin assembly starts to be closed; when the nail bin bracket and the nail anvil bracket are close to a set distance, the nail height adjusting assembly sends an electric signal to the controller, and the controller controls the power source to stop working. The linear cutting anastomat has the advantages that the nail height adjusting assembly is adopted, so that compared with the prior art, the linear cutting anastomat can realize the closing height of the electric control anastomat, and the forming heights of anastomat with different requirements are met.

Description

Linear cutting anastomat and application method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a linear cutting anastomat and a use method thereof.

Background

In general surgical treatment, a linear cutting stapler is often used to perform a tissue cutting and closing function. Specifically, the distal end of the anastomat is provided with a nail bin and a nail anvil, when the nail bin and the nail anvil are separated, the tissue to be cut is placed between the nail bin and the nail anvil, the tissue is reasonably extruded by adjusting the distance between the nail bin and the nail anvil, and when the distance between the nail bin and the nail anvil reaches the safe range of effective cutting and suturing, the tissue is triggered.

The inventors of the present application have contemplated that a linear cutting stapler may be provided to address the issue of adjusting the closing height of the stapler.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned drawbacks and shortcomings of the prior art, the present invention provides a linear cutting stapler and a method for using the same, which solves the technical problem of how to adjust the closing height of the linear cutting stapler to meet the forming heights of staples with different requirements.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:

in a first aspect, an embodiment of the present invention provides a linear cutting stapler, including a cartridge assembly, a closure driving mechanism, a power transmission mechanism, a housing, a controller, and a power source and a staple height adjustment assembly electrically connected to the controller;

The nail bin assembly comprises a nail bin bracket and a nail anvil bracket, wherein the near side of the nail bin bracket, the near side of the nail anvil bracket, the far side of the power transmission mechanism and the closing driving mechanism are positioned in the shell, the closing driving mechanism is connected with the nail bin bracket or simultaneously connected with the nail bin bracket and the nail anvil bracket, the nail bin bracket can be close to or far from the nail anvil bracket, and the nail height adjusting assembly is positioned on the shell;

the power source is connected with the power transmission mechanism, and the power transmission mechanism is in selective driving connection with the closed driving mechanism;

when the power transmission mechanism is in driving connection with the closing driving mechanism and the power source transmits power to the closing driving mechanism through the power transmission mechanism, the nail bin assembly starts to be closed;

when the nail bin bracket and the nail anvil bracket are close to a set distance, the nail height adjusting assembly sends an electric signal to the controller, and the controller controls the power source to stop working.

Optionally, the nail height adjusting assembly comprises a position sensor and a nail height adjusting bracket, a first chute extending along the closing direction of the nail bin assembly is arranged on the shell, the position sensor is located in the first chute and connected with the nail height adjusting bracket, and the position sensor moves up and down along the first chute by stirring the nail height adjusting bracket, so that the set distance between the nail bin bracket and the nail anvil bracket is adjusted.

Optionally, the position sensor is an electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, or hall sensor.

Optionally, the position sensor includes a hall sensor located in the first chute and a magnet located on the cartridge assembly, the magnet triggering the hall sensor when moving to the same height as the hall sensor along with the cartridge assembly, the hall sensor sending an electrical signal to the controller.

Optionally, the nail height adjusting assembly further comprises a hall bracket for mounting the hall sensor;

one side of the Hall support, which is opposite to the Hall sensor, is provided with a guide post, one end of the nail height adjusting support is provided with a clamping groove, the guide post is inserted into the clamping groove, the middle part of the nail height adjusting support is movably connected with the shell through a rotating shaft, the other end of the nail height adjusting support is provided with a deflector rod, when the deflector rod is pushed to enable the nail height adjusting support to rotate, the guide post slides in the clamping groove, and meanwhile, the Hall support and the Hall sensor move up and down in the first sliding groove through the cooperation of the guide post and the clamping groove;

the shell is provided with an opening for the deflector rod to extend out of the shell, and the outer surface of the shell is stuck with scale marks at the opening.

Optionally, the distance from the axis of the rotating shaft in the middle of the nail height adjusting bracket to the deflector rod is greater than the distance from the axis of the rotating shaft in the middle of the nail height adjusting bracket to the clamping groove.

Optionally, the nail anvil bracket is provided with a firing screw, and the power transmission mechanism is in selective driving connection with the firing screw;

when the power transmission mechanism is in driving connection with the firing screw and the power source transmits power to the firing screw through the power transmission mechanism, the nail bin assembly starts firing;

the power transmission mechanism comprises a rotary input shaft, a first rotary output piece, a switching piece, a second rotary output piece and a safety switch;

the switching piece is arranged on the rotary input shaft in a driving connection mode and can move between a first position and a second position, the safety switch is connected with the switching piece in a rotatable mode relative to the switching piece and can drive the switching piece to move, the first rotary output piece is connected with the closing driving mechanism in a driving rotation mode, and the second rotary output piece is connected with the firing screw in a driving rotation mode;

when the switching piece is positioned at the first position:

the switching piece is connected with the first rotary output piece in a driving connection mode, and is separated from the second rotary output piece;

when the switching piece is positioned at the second position:

the switching piece is disconnected with the first rotation output piece, and the switching piece is connected with the second rotation output piece in a driving connection mode.

Optionally, the switching piece comprises a first switching slide block, a fixed slide block and a switching shaft sleeve;

the switching shaft sleeve is sleeved outside the rotary input shaft, the rotary input shaft is provided with a second chute which is radially communicated, the first switching slide block and the fixed slide block can be supported in the second chute in a bidirectional moving way along the axial direction of the rotary input shaft, at least one end of the first switching slide block extends out of the second chute, and both ends of the fixed slide block extend out of the second chute;

the near end of the switching shaft sleeve is provided with a mounting groove, the fixed sliding block is also positioned in the mounting groove, and the two ends of the fixed sliding block extending out of the second sliding groove are connected with the peripheral wall of the switching shaft sleeve through pin shafts, so that the fixed sliding block is supported in the mounting groove of the switching shaft sleeve;

the distal end of the first switching slide block is clamped with the proximal end of the fixed slide block, so that the first switching slide block can be supported in the second sliding groove along the radial bidirectional movement of the rotary input shaft.

Optionally, the first rotation output piece comprises a first bevel gear and a closed shaft sleeve, the first bevel gear is sleeved and fixed on the closed shaft sleeve, and the closed shaft sleeve is sleeved and arranged on the periphery of the rotation input shaft;

the closing driving mechanism comprises a closing screw rod, a closing nut and a second bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is fixedly sleeved with the closing screw rod, the closing nut is screwed on the closing screw rod, and the nail bin bracket is fixedly sleeved on the closing nut;

The inner wall of the far end of the closed shaft sleeve is provided with at least two first stop blocks which are circumferentially arranged at intervals, the at least two first stop blocks are staggered in diameter, and the first stop blocks and the first switching sliding blocks are used for forming driving connection of the switching piece and the first rotating output piece;

when the switching piece is positioned at the first position, the first switching sliding block corresponds to the first stop block in the circumferential direction;

when the switching piece is located at the second position, the first switching sliding block is located at the far side of the first stop block.

Optionally, the firing screw comprises a transition section and a thread section which are sequentially connected and coaxial from near to far, the near end of the transition section is sleeved with the far end of the rotation input shaft in a bidirectional rotation manner, and a third chute which is radially communicated is arranged on the transition section;

the second rotary output piece is a second switching sliding block, the second switching sliding block is movably supported in the third sliding groove along the radial direction of the firing screw, and at least one end of the second switching sliding block extends out of the third sliding groove;

the inner wall of the far end of the switching shaft sleeve is provided with at least two second stop blocks which are circumferentially arranged at intervals, the at least two second stop blocks are staggered along the diameter, and the second stop blocks and the second switching sliding blocks are used for forming driving connection of the switching piece and the second rotary output piece;

when the switching piece is positioned at the first position, the second stop block is positioned at the near side of the second switching sliding block;

When the switching piece is positioned at the second position, the second stop block corresponds to the second switching sliding block in the circumferential direction.

In a second aspect, an embodiment of the present invention provides a method for using the linear cutting stapler according to the above, where the method includes the following steps:

s1, adjusting the set distance between a nail bin bracket and a nail anvil bracket through a nail height adjusting assembly;

s2, connecting the power transmission mechanism and the closing driving mechanism in a driving connection mode;

s3, starting a power source, and starting to close the nail bin assembly when the power source transmits power to the closing driving mechanism through the power transmission mechanism;

s4, when the nail bin bracket and the nail anvil bracket are close to a set distance, the nail height adjusting assembly sends an electric signal to the controller, the controller controls the power source to stop working, and the nail bin assembly stops closing.

(III) beneficial effects

The beneficial effects of the invention are as follows: according to the linear cutting anastomat, as the power source is connected with the power transmission mechanism, the power transmission mechanism is in selective driving connection with the closing driving mechanism; when the power transmission mechanism is in driving connection with the closing driving mechanism and the power source transmits power to the closing driving mechanism through the power transmission mechanism, the nail bin assembly starts to be closed; when the nail bin bracket and the nail anvil bracket are close to a set distance, the nail height adjusting assembly sends an electric signal to the controller, and the controller controls the power source to stop working.

Drawings

FIG. 1 is an exploded view of one embodiment of a linear cutting stapler of the present invention;

FIG. 2 is a schematic perspective view of the closure drive mechanism, power transmission mechanism and firing screw of FIG. 1;

FIG. 3 is a perspective view of the closure drive mechanism, power transmission mechanism and firing screw of FIG. 1 from another perspective;

FIG. 4 is a schematic view, partially in section, of the linear cutting stapler of the present invention with the switch in a second position;

FIG. 5 is a perspective view of the housing, staple height adjustment assembly, and linkage of FIG. 1;

fig. 6 is a perspective view of the housing, staple height adjustment assembly and linkage of fig. 1 from another perspective, wherein the housing shows a first runner on the inside for placement of the staple height adjustment assembly.

[ reference numerals description ]

1: a staple cartridge assembly; 101: a staple cartridge; 102: a cartridge holder; 1021: a first elongated slot; 1022: a first round hole; 103: a nail anvil; 104: a nail anvil bracket; 1041: a long fixed ear; 1042: short fixing lugs; 105: a nail anvil head; 106: firing the screw; 1061: a third chute; 107: firing the nut; 1071: a cutting knife; 108: a link mechanism; 1081: a first link; 1082: a second link; 1084: a fixing pin; 1085: a sliding pin;

2: closing the driving mechanism; 201: a suspension; 2011: a connecting plate; 2012: a second elongated slot; 2013: a second round hole; 202: closing the screw; 203: closing the nut; 204: a second bevel gear; 205: a top end bearing; 206: a bottom end bearing;

3: a power transmission mechanism; 301: rotating the input shaft; 3011: a second chute; 3012: a first shaft section; 3013: a second shaft section; 3014: a third shaft section; 3015: a fourth shaft section;

302: a first rotary output member; 3021: a first bevel gear; 3022: closing the shaft sleeve;

303: a switching member; 3031: a first switching slider; 3032: a fixed slide block; 3033: a switching shaft sleeve; 3034: a mounting groove; 304: a second rotary output member; 3041: a second switching slider;

305: a safety switch; 3051: a shifting block; 3052: a clamp; 3053: a guide rod;

306: an input shaft bearing seat; 307: a first bushing boss; 308: a second sleeve seat;

309: a screw; 310: clamping springs; 311: a first bearing; 312: a second bearing; 313: a flange shaft sleeve; 314: a first stopper; 315: a first rotating sleeve; 316: a second rotating sleeve; 317: a third rotary sleeve; 318: a second stopper;

4: a housing; 401: a first chute; 402: an opening;

5: a staple height adjustment assembly; 501: nailing the height adjusting bracket; 502: a Hall bracket; 503: a hall sensor; 504: and (3) a magnet.

Detailed Description

The invention will be better explained by the following detailed description of the embodiments with reference to the drawings. Wherein, the side close to the doctor in use is the near side, and the side close to the patient is the far side.

Referring to fig. 1, 2 and 3, the present embodiment provides a linear cutting stapler. The linear cutting anastomat comprises a nail bin assembly 1, a closing driving mechanism 2, a power transmission mechanism 3, a shell 4, a controller, a nail height adjusting assembly 5 electrically connected with the controller and a power source electrically connected with the controller. The whole shape of the shell 4 is cuboid, and consists of a left part and a right part, and the two parts are fixed by fixing pins or screws.

The cartridge assembly 1 includes a cartridge housing 102 with a cartridge 101, an anvil housing 104 with an anvil 103, a firing screw 106, and a firing nut 107 with a cutting knife 1071. The proximal sides of cartridge holder 102 and anvil holder 104 are located within housing 4 and the distal sides of cartridge holder 102 and anvil holder 104 are located outside of housing 4. The anvil head 105 is mounted to the distal end of the anvil bracket 104. The structure and operation of the particular cartridge assembly 1 is the same as in the prior art, and therefore the structure not associated with the movement of the closure drive mechanism 2 and the power transmission mechanism 3 of the present invention is not described in detail herein.

The closure driving mechanism 2 is located in the housing 4 and comprises a suspension 201, a closure screw 202, a closure nut 203, a second bevel gear 204, a top end bearing 205 and a bottom end bearing 206. The suspension 201 is in an inverted U shape, the bottom of the suspension 201 extends distally to form a connecting plate 2011, and the connecting plate 2011 is fixedly connected with the proximal side of the anvil bracket 104.

The power transmission mechanism 3 includes a rotation input shaft 301, a first rotation output member 302, a switching member 303, a second rotation output member 304, a safety switch 305, an input shaft bearing housing 306, a first bushing mount 307, a second bushing mount 308, a first bearing 311, a first rotation bushing 315, a second rotation bushing 316, and a third rotation bushing 317. The first bearing 311, the first rotary output 302, the input shaft bearing housing 306, the first bushing mount 307, the first rotary bushing 315, and the second rotary bushing 316 are located in the suspension 201, and the second rotary output 304, the second bushing mount 308, and the third rotary bushing 317 are located in the anvil bracket 104. The proximal portion of the rotary input shaft 301 is rotatably located in the suspension 201 and the distal portion is rotatably located in the anvil bracket 104.

In this embodiment, the first rotation output member 302 is sleeved on the outer periphery of the rotation input shaft 301, and the first rotation output member 302 includes a first bevel gear 3021 and a closed shaft sleeve 3022. The inner hole of the first bevel gear 3021 has a plurality of circular arc teeth arranged at intervals, and the outer wall of the proximal end of the closing sleeve 3022 has a plurality of circular arc grooves engaged with the plurality of circular arc teeth, whereby the first bevel gear 3021 is in driving connection with the closing sleeve 3022. The circular arc tooth slot is matched, so that the transmission strength can be increased, and the abrasion of the tooth slot is reduced.

The input shaft bearing housing 306 and the first bushing block 307 are fixed in the suspension 201 by means of screws 309, and the input shaft bearing housing 306 and the first bushing block 307 have a rectangular shape, which enables the input shaft bearing housing 306 and the first bushing block 307 to be more stably fixed in the suspension 201, especially when there is a mounting plane in the suspension 201 that is adapted to the input shaft bearing housing 306 and the first bushing block 307, the input shaft bearing housing 306 and the first bushing block 307 do not rotate unnecessarily, and at the same time, the rectangular bearing housing and the bushing block are more easily fixed with the suspension 201.

The first bearing 311, the first rotary sleeve 315, and the second rotary sleeve 316 are coaxial, and the first rotary output member 302 and the rotary input shaft 301 are coaxial. The second rotating sleeve 316 is placed in the first sleeve mount 307, the distal end of the closing sleeve 3022 being supported in the first sleeve mount 307 by bi-directional rotation of the second rotating sleeve 316, the proximal end of the closing sleeve 3022 and the first bevel gear 3021 being located between the input shaft bearing housing 306 and the first sleeve mount 307. The first bearing 311 is fixed in the input shaft bearing housing 306, the first rotation shaft housing 315 is placed in an inner hole of the closing shaft housing 3022, the rotation input shaft 301 passes through the first bearing 311, the first rotation shaft housing 315 and the closing shaft housing 3022 and forms a bidirectional rotation support for the rotation input shaft 301 by the first bearing 311 and the first rotation shaft housing 315, and the axis of the rotation input shaft 301 is fixed by the first bearing 311 and the first rotation shaft housing 315.

It should be noted that the axis of the rotary input shaft 301 is perpendicular to the closing direction and also parallel to the axis of the firing screw 106, and the rotary input shaft 301 and the closing sleeve 3022 do not constitute any drive connection.

Specifically, the proximal end of the rotation input shaft 301 is used to connect with a power source capable of outputting rotation such as a motor, and introduce rotation power into the power transmission mechanism 3. Of course, in other embodiments, the rotary input shaft 301 may also be the output shaft of the power source itself.

As shown in connection with fig. 4, the rotary input shaft 301 includes, from near to far, a first shaft section 3012, a second shaft section 3013, a third shaft section 3014, and a fourth shaft section 3015, which are connected in order and coaxial. The diameter of the first shaft section 3012 is smaller than that of the second shaft section 3013, a clamping spring 310 is arranged at the joint of the first shaft section 3012 and the second shaft section 3013, the clamping spring 310 is fixed in an annular groove on the inner wall of the input shaft bearing seat 306, the diameter of the second shaft section 3013 is smaller than that of the third shaft section 3014, namely, a first annular end face is formed between the second shaft section 3013 and the third shaft section 3014, and the first bearing 311 is axially limited between the clamping spring 310 and the first annular end face. The diameter of the third shaft section 3014 is larger than that of the fourth shaft section 3015, namely a second annular end face is formed between the third shaft section 3014 and the fourth shaft section 3015, a third annular end face is arranged in an inner hole of the closed shaft sleeve 3022, and the first rotary shaft sleeve 315 is axially limited between the second annular end face and the third annular end face. The proximal portion of the closure bushing 3022 has a larger diameter than the distal portion of the closure bushing 3022, i.e. a fourth annular end surface is formed between the proximal portion of the closure bushing 3022 and the distal portion of the closure bushing 3022, the distal end of the first bushing seat 307 being provided with an inwardly directed annular abutment between which the second rotation bushing 316 is axially limited.

In this embodiment, the second bushing block 308 is secured in the anvil bracket 104 by screws 309. The second sleeve mount 308 is rectangular in shape, which allows the second sleeve mount 308 to be more stably secured within the anvil bracket 104, particularly when the anvil bracket 104 has a mounting plane that is compatible with the second sleeve mount 308, and the rectangular sleeve mount is also more easily secured to the anvil bracket 104 without unnecessary rotation of the second sleeve mount 308.

Specifically, the firing screw 106 includes, from near to far, a transition section and a threaded section that are sequentially connected and coaxial. The distal end of the threaded section is rotatably connected with the anvil bracket 104 through a flange shaft sleeve 313, a third rotary shaft sleeve 317 is placed in a second shaft sleeve seat 308, the transition section of the firing screw 106 passes through the third rotary shaft sleeve 317 and forms a bidirectional rotary support for the firing screw 106 by the third rotary shaft sleeve 317, and the axis of the firing screw 106 is fixed through the third rotary shaft sleeve 317 and the flange shaft sleeve 313. The second bearing 312 is disposed at the connection between the transition section and the threaded section of the firing screw 106, the second bearing 312 is a thrust bearing, and the diameter of the threaded section is larger than that of the transition section, that is, a fifth annular end face is formed between the threaded section and the transition section, and the thrust bearing is axially limited between the fifth annular end face and the second bearing seat 308. The proximal end of the second hub seat 308 is provided with an inwardly directed annular flange and the third swivel hub 317 is axially confined between the annular flange and the second bearing 312.

The distal end of the rotary input shaft 301 (i.e., the distal end of the fourth shaft section 3015) is bi-directionally rotatably sleeved with the proximal end of the firing screw 106 (i.e., the proximal end of the transition section), i.e., the proximal end of the transition section of the firing screw 106 extends into the circular blind bore of the fourth shaft section 3015 of the rotary input shaft 301, but the inner wall of the circular blind bore is in clearance with the proximal end of the transition section, which do not form any drive connection.

In this embodiment, the first rotary output member 302 is connected to the cartridge holder 102 through the closing driving mechanism 2 to convert the rotation of the first rotary output member 302 into the up-down movement of the cartridge holder 102, and the up-down movement of the cartridge holder 102 forms the opening and closing of the cartridge holder 102 and the anvil holder 103.

Specifically, an input shaft bearing seat 306 is fixedly installed at the bottom end opening of the suspension 201, a mounting hole is formed in the upper wall of the input shaft bearing seat 306, a bottom end bearing 206 is fixed in the mounting hole of the input shaft bearing seat 306, and the bottom end of the closed screw 202 is supported on the input shaft bearing seat 306 in a bidirectional rotation manner through the bottom end bearing 206. The tip bearing 205 is a thrust bearing, fixed to the top of the suspension 201, and the tip of the closing screw 202 is fixed to the suspension 201 through the tip bearing 205. A closure nut 203 is threaded onto the closure screw 202 and the closure nut 203 is fixedly attached to the proximal end of the cartridge housing 102. The second bevel gear 204 is fixed to the closing screw 202, and the second bevel gear 204 is meshed with the first bevel gear 3021 of the first rotation output member 302. Thus, the axes of the second bevel gear 201, the closure screw 202 and the closure nut 203 are perpendicular to the axis of the first rotational output member 302, and when the first rotational output member 302 rotates, the second bevel gear 204 and the closure screw 202 also rotate therewith, such that the closure nut 203 drives the cartridge holder 102 to move up and down. Of course, in other embodiments, the first rotary output 302 could also be a conventional drive gear, with the corresponding closure drive mechanism 2 subsequently utilized to transfer power to the cartridge housing 102.

In the present embodiment, the switching member 303 includes a first switching slider 3031, a fixed slider 3032, and a switching sleeve 3033. The shift sleeve 3033 is disposed outside the fourth shaft section 3015 of the rotary input shaft 301 and is coaxial with the rotary input shaft 301 and the first rotary output member 302. The first bushing seat 307 is located proximal to the switch 303 and the second bushing seat 308 is located distal to the switch 303. The fourth shaft section 3015 of the rotation input shaft 301 is provided with a second chute 3011 that is radially penetrating, i.e., the second chute 3011 is opened along the diameter direction of the fourth shaft section and penetrates the peripheral wall of the fourth shaft section 3015, and the second chute 3011 is located in the middle of the fourth shaft section 3015. The first switch block 3031 and the fixed block 3032 are supported in the second slide groove 3011 so as to be movable bi-directionally in the axial direction of the rotation input shaft 301, and at least one end of the first switch block 3031 extends out of the second slide groove 3011 and both ends of the fixed block 3032 extend out of the second slide groove 3011. The proximal end of the switching shaft sleeve 3033 is provided with a mounting groove 3034, the fixed sliding block 3032 is positioned in the mounting groove 3034, and two ends of the fixed sliding block 3032 extending out of the second sliding groove 3011 are connected with the peripheral wall of the switching shaft sleeve 3033 through pin shafts. The distal end of the first switch block 3031 is snapped into engagement with the proximal end of the stationary block 3032 such that the first switch block 3031 is supported in the second chute 3011 for bi-directional movement in the radial direction of the rotary input shaft 301.

Specifically, the first switch block 3031 and the fixed block 3032 are shaped as plate members, the distal end of the first switch block 3031 is provided with a T-shaped connector, the proximal end of the fixed block 3032 is provided with a T-shaped clamping hole penetrating the fixed block 3032 in the thickness direction of the fixed block 3032, and the T-shaped connector is matched with the T-shaped clamping hole, so that the first switch block 3031 can be supported in the second sliding groove 3011 in a bidirectional movement manner along the radial direction of the rotation input shaft 301. The fixed slider 3032 is provided at both ends extending out of the second sliding groove 3011 with pin holes penetrating the fixed slider 3032 in the thickness direction of the fixed slider 3032, and the fixed slider 3032 is supported on the switching shaft sleeve 3033 by pin shafts penetrating the pin holes. In order to facilitate the installation of the fixed slider 3032, support holes are provided at both sides of the installation groove 3034 in the switching shaft sleeve 3033, thereby facilitating the installation of the pin shaft. And the fixed slider 3032 is provided to enable the switching shaft sleeve 3033 to be drivingly connected to the rotary input shaft 301 while the switching shaft sleeve 3033 is moved between the first position and the second position aligned in the axial direction of the rotary input shaft 301; the length of the second chute 3011 enables the switching element 303 to be in driving connection with only the first power take-off 302 when in the first position and the switching element 303 to be in driving connection with only the second power take-off 304 when in the second position. In this embodiment, the first location is proximal to the second location. In addition, the proximal end of the first switch block 3031 tapers forming a chamfer on both the proximal upper and lower surfaces of the first switch block 3031.

The distal inner wall of the closure sleeve 3022 has three circumferentially equally spaced first stops 314 thereon whereby the three first stops 314 are staggered in diameter, i.e., neither first stop 314 is on the same diameter. The circumferential side of each first stop 314 may be configured to push against the circumferential side of the first switch slider 3031, thereby forming a driving connection between the closure sleeve 3022 and the switch 303 that is axially movable in opposite directions and that is capable of driving the two-way rotation, in other words, when the switch 303 is in the first position, the first switch slider 3031 protrudes into the closure sleeve 3022 and pushes against the circumferential side of the first stop 314 to push the first power output member 302 to rotate, and when the switch 303 is in the second position, the first switch slider 3031 is pulled out of the closure sleeve 3022 (i.e., when the closure sleeve 3022 is located proximal to the first switch slider 3031 and is not engaged).

Corresponding to the tapering design of the first switch block 3031, the inner side of the distal end of the first stop 314 on the closure sleeve 3022 is provided with a distally outwardly sloping ramp which is inclined at the same angle as the ramp on the first switch block 3031. The purpose of this arrangement is that the angle at which the closing sleeve 3022 stops after each rotation is different, for example, only one first stop 314 is provided, and the position at which the first stop 314 stops may be opposite to the first switch slider 3031, so that during the movement of the switch member 303 to the first position, the first switch slider 3031 will axially abut against the first stop 314, preventing the switch member 303 from reaching the first position to form a driving connection with the first rotation output member 302. The plurality of first stoppers 314 disposed along the diameter of the closing sleeve 3022 in a staggered manner are radially bi-directionally movable in combination with the first switch slider 3031, when the first switch slider 3031 is aligned with one of the first stoppers 314, the first switch slider 3031 is pushed radially inward by the first stopper 314 aligned therewith (the first switch slider 3031 and the inclined surface on the first stopper 314 facilitate the pushing) so as not to interfere with the insertion of the first switch slider 3031 into the closing sleeve 3022 to form a driving connection with the closing sleeve 3022, and the other end of the first switch slider 3031 protrudes more, and corresponds better to the circumference of the first stopper 314 on the other side. Since the three first stoppers 314 are uniformly disposed and the first switch block 3031 has only upper and lower ends, there may be a certain distance between the first switch block 3031 and the first stoppers 314 circumferentially corresponding thereto, and the first switch block 3031 idles a certain distance in the initial stage of the re-rotation of the first switch block 3031, and the closing sleeve 3022 is pushed to rotate again when the first switch block 3031 rotates to circumferentially abut against the first stoppers 314. This lost motion distance results in only a slightly earlier or later closing of the cartridge holder 102 and anvil holder 104 without affecting the stapling effect. Therefore, the design can ensure smooth switching between the closed state and the firing state.

In this embodiment, a second rotary output member 304 is mounted on the transition section of the firing screw 106, and the second rotary output member 304 and the switching member 303 form a selectively driven connection to drive the firing screw 106 to rotate. The firing nut 107 is screwed on the firing screw 106, and thus, the bidirectional rotation of the firing screw 106 is converted into the bidirectional movement of the firing nut 107, thereby realizing the firing motion.

Specifically, the second rotational output member 304 includes a second switching slider 3041. A third sliding groove 1061 is radially penetrating through the transition section of the firing screw 106, that is, the third sliding groove 1061 penetrates through the peripheral wall of the transition section along the diameter direction of the transition section, the third sliding groove 1061 is a rectangular groove, and the third sliding groove 1061 is located in the middle of the transition section. The second switching slide 3041 is supported in the third slide 1061 in a radially bidirectional manner along the transition section of the firing screw 106, and at least one end of the second switching slide 3041 protrudes out of the third slide 1061. In this embodiment, both ends of the second switching slider 3041 extend out of the third sliding slot 1061.

Specifically, the second switching slider 3041 is in the shape of a plate, and the second switching slider 3041 is provided with a bar-shaped hole (preferably a long hole) penetrating the second switching slider 3041 in the thickness direction of the second switching slider 3041, the length direction of the bar-shaped hole being along the radial direction of the transition section, and the second switching slider 3041 being supported on the transition section of the firing screw 106 by a circular rod penetrating in the bar-shaped hole. For the convenience of installation of the second switching slider 3041, support holes are provided at both sides of the third sliding groove 1061 in the transition section, so that the circular bar on the second switching slider 3041 is conveniently installed, and both ends of the circular bar pass through the support holes on the side wall of the transition section. Also, the proximal end of the second switching slider 3041 is tapered, forming slopes on both the proximal upper and lower surfaces of the second switching slider 3041.

The distal inner wall of the shift collar 3033 has three circumferentially equally spaced second stops 318 whereby the three second stops 318 are staggered in diameter, i.e., neither second stop 318 is on the same diameter. The circumferential side of each second stop 318 may be configured to be in abutment with the circumferential side of the second switch slide 3041, thereby forming a driving connection between the switch sleeve 3033 and the second rotary output member 304 that is axially moveable in opposite directions and that is capable of driving bi-directional rotation, in other words, when the switch member 303 is in the first position, the switch member 303 is separated from the second rotary output member 304 (i.e., the switch sleeve 3033 is located proximal to the second switch slide 3041 and does not form an engagement), and when the switch member 303 is in the second position, the switch sleeve 3033 is sleeved on the second switch slide 3041, and the second stop 318 on the inner wall of the switch sleeve 3033 is in abutment with the circumferential side of the second switch slide 3041 for pushing the second power output member 304 and the firing nut 107 to rotate.

Corresponding to the tapered design of the second switch slide 3041, the inner side of the distal end of the second stop 318 on the switch sleeve 3033 is provided with a distally outwardly sloping ramp at the same angle as the ramp on the second switch slide 3041. The purpose of this arrangement is that the angle at which the shift sleeve 3033 stops after each rotation in the first position is different, for example, only one second stop 318 is provided, and the position at which the second stop 318 stops may be opposite to the second shift block 3041, so that during the movement of the shift sleeve 3033 to the second position, the second stop 318 will axially abut against the second shift block 3041, preventing the shift sleeve 3033 from reaching the second position to form a driving connection with the second rotational output member 304. And a plurality of second stoppers 318 staggered along the diameter of the switching sleeve 3033 are radially and bi-directionally movable in combination with the second switching slider 3041, when the second switching slider 3041 is aligned with one of the second stoppers 318, the second switching slider 3041 will be pushed radially inwards by the second stopper 318 aligned with the second switching slider 3041 (the inclined surfaces on the second switching slider 3041 and the second stopper 318 are beneficial to the pushing) along with the axial movement of the switching sleeve 3033 so as not to prevent the switching sleeve 3033 from moving to the second position to form driving connection with the second switching slider 3041, and the other end of the second switching slider 3041 will protrude more, and better corresponds to the second stopper 318 on the other side circumferentially. Since the three second stoppers 318 are uniformly disposed and the second switching slider 3041 has only upper and lower ends, there may be a certain distance between the second switching slider 3041 and the second stopper 318 circumferentially corresponding thereto, and the second stopper 318 will idle a certain distance in the initial stage of the second rotation of the switching sleeve 3033, and then push the firing screw 106 to rotate when the second stopper 318 rotates to circumferentially abut against the second switching slider 3041. This free-running distance results in a slightly earlier or later discharge of the firing staple without affecting the stapling effect. Therefore, the design can ensure smooth switching between the closed state and the firing state.

Further, on the outer wall of the switching sleeve 3033, an annular groove is provided. The safety switch 305 includes a dial 3051 and a circular collar 3052, the collar 3052 is sleeved in the annular groove, and both ends of the collar 3052 are fixedly connected with the dial 3051, thereby forming a connection of the safety switch 305 with the switching shaft sleeve 3033 in a manner rotatable relative to the switching shaft sleeve 3033 and capable of driving the switching shaft sleeve 3033 to move bi-directionally between a first position and a second position. The safety switch 305 in this embodiment provides for manual input of switching power. In addition, a guide rod 3053 is disposed between the first bushing seat 307 and the second bushing seat 308, an axis of the guide rod 3053 is parallel to an axis of the switching bushing 3033, and the guide rod 3053 penetrates the shift block 3051 to guide the shift block 3051. And the shell 4 is provided with a slideway for extending the shifting block 3051 out of the shell 4.

In this embodiment, the cartridge assembly 1 further comprises two sets of linkages 108 on the left and right sides of the cartridge housing 102, each set of linkages 108 comprising a first link 1081 and a second link 1082 that are hinged. The first link 1081 and the second link 1082 are equal in length, and the hinge position of the first link 1081 and the second link 1082 is located at the center of the lengths of the two links, thereby dividing the two links into two isosceles triangles downward.

The nail cartridge bracket 102 is provided with a first long groove 1021 and a first round hole 1022 which are communicated left and right, the connecting plate 2011 of the suspension 201 is provided with a second long groove 2012 and a second round hole 2013 which are communicated left and right, the nail anvil bracket 104 is provided with a long fixing lug 1041 which is symmetrical left and right and a short fixing lug 1042 which is symmetrical left and right, the long fixing lug 1041 is provided with a third long groove which is overlapped with the second long groove 2012 in position, and the short fixing lug 1042 is provided with a third round hole which is overlapped with the second round hole 2013.

The top ends of the first links 1081 in the two sets of link mechanisms 108 are hinged to the same sliding pin 1085 passing through the first elongated slot 1021 on the cartridge holder 102, and the bottom ends of the first links 1081 in the two sets of link mechanisms 108 are hinged to the second circular hole 2013 and the third circular hole of the short fixing lug 1042 by fixing pins 1084, respectively. The top ends of the second links 1082 of the two sets of linkages 108 are respectively hinged to the first circular holes 1022 on the cartridge holder 102 by means of fixed pins 1084, and the bottom ends of the second links 1082 of the two sets of linkages 108 are respectively hinged to the second elongated slot 2012 and the third elongated slots of the two elongated fixing lugs 1031 by means of sliding pins 1085. With the above structure, the top end of the first link 1081 may be rotatable and slidable along the cartridge holder 102, and the bottom end of the second link 108 may be rotatable and slidable along the anvil holder 104. Therefore, the cartridge holder 102 can be prevented from tilting or being staggered horizontally relative to the anvil holder 104 in the process of moving up and down, namely, the cartridge holder 102 and the anvil holder 104 are ensured to be parallel when being opened and closed, and meanwhile, the pressure at the joint of the cartridge holder 102 and the closure nut 203 is slowed down, so that the power transmission mechanism 3 can be arranged to make more optimized and simplified designs without considering the pressure at the joint.

Further, the long fixing lug 1041 is provided at a position near the second hub seat 308 corresponding to the fourth shaft section 3015 of the rotation input shaft 301 in the axial direction, and the connecting pin in the long fixing lug 1041 is located below the fourth shaft section 3015. The short fixing lug 1042 is located at the distal side of the second sleeve seat 308, and the connecting pin in the short fixing lug 1042 is located laterally below the anvil 103 on the anvil bracket 104. The arrangement ensures that the axial structure of the anastomat is compact, and the volume of the anastomat can be reduced.

Of course, in other embodiments, the positions of the long fixing lug 1041 and the short fixing lug 1042 may be interchanged, that is, the bottom ends of the first links 1081 in the two sets of link mechanisms 108 are respectively hinged to the long slots of the long fixing lug 1041 through one sliding pin, the bottom ends of the second links 1082 in the two sets of link mechanisms 108 are hinged to the second round hole and the third round hole of the short fixing lug 1032 through a fixing pin, the short fixing lug 1042 is located at the proximal side of the second axle housing 308, the connecting pin in the short fixing lug 1042 is located below the fourth axle segment 3015, and the long fixing lug 1031 is located at the distal side of the second axle housing 308.

The "long" and "short" in the long fixing ear and the short fixing ear are a set of relative concepts, and merely represent the long-short relationship between the two, and are not limited to specific dimensions.

As shown in fig. 5 and 6 in combination, the nail height adjusting assembly 5 includes a nail height adjusting bracket 501, a hall bracket 502, a hall sensor 503 electrically connected to a controller, and a magnet 504. The magnet 504 may be mounted on the cartridge holder 102 or the linkage 108 to facilitate triggering of the hall sensor. In this embodiment, the magnet 504 is mounted on the linkage 108. The inner wall of the shell 4 is provided with a first chute 401 extending along the closing direction of the nail bin assembly 1 corresponding to the magnet 504, a Hall bracket 502 for placing a Hall sensor 503 is arranged on one side of the Hall bracket 502, which is opposite to the Hall sensor 503, a guide post is arranged, a clamping groove is formed in one end of the nail height adjusting bracket 501, the guide post is inserted into the clamping groove, the middle part of the nail height adjusting bracket 501 is movably connected with the shell 4 through a rotating shaft, a deflector rod is arranged at the other end of the nail height adjusting bracket 501, when the deflector rod is pushed to enable the nail height adjusting bracket 501 to rotate, the guide post slides in the clamping groove, and meanwhile, the Hall bracket 502 and the Hall sensor 503 move up and down in the first chute 401 through the cooperation of the guide post and the clamping groove. And the shell 4 is provided with an opening 402 for the deflector rod to extend out of the shell 4, and the outer surface of the shell 4 is pasted with scale marks at the opening 402. After the heights of the Hall bracket 502 and the Hall sensor 503 are adjusted through the deflector rod, the power source transmits power to the closing driving mechanism 2 through the power transmission mechanism 3, the closing driving mechanism 2 drives the nail cartridge bracket 102 and the link mechanism 108 to descend, when the magnet 504 on the nail cartridge bracket 102 or the link mechanism 108 descends to the same height as the Hall sensor 503, the magnet 504 triggers the Hall sensor 503, the Hall sensor 503 transmits the position information of the nail cartridge bracket 102 to the controller, and the controller controls the power source to stop working. It should be noted that the hall sensor 503 may also be another position sensor, for example, an electromagnetic sensor, a photoelectric sensor, a differential transformer sensor, an eddy current sensor, a capacitive sensor, or a reed switch. As long as the nail bin bracket 102 descends to the set position, the position sensor can send the position information of the nail bin bracket 102 to the controller, and the controller controls the power source to stop working, so that the nail bin bracket 102 and the nail anvil bracket 104 are kept at the set distance, and the forming heights of the anastomoses with different requirements are met.

Further, the distance from the axis of the rotary shaft in the middle of the staple height adjusting bracket 501 to the deflector rod is larger than the distance from the axis of the rotary shaft to the clamping groove, and the displacement of the hall sensor 503 is amplified by utilizing the lever principle, so that the distance between the staple cartridge bracket 102 and the anvil bracket 104 (i.e. the closing height of the staple cartridge assembly 1) is more finely adjusted.

In summary, the anastomat in the embodiment can complete the following actions:

the first step:

the operator dials the driving lever at one end of the nail height adjusting bracket 501 and moves the driving lever to the scale mark corresponding to the set nail height, and in this process, the other end of the nail height adjusting bracket 501 finely adjusts the height of the hall sensor 503 by the lever principle.

When the safety switch 305 drives the switching element 303 to move to the first position, the switching element 303 is connected to the first rotary output element 302 in a driving connection manner (i.e. the first switching slider 3031 of the switching element 303 is inserted into the closing sleeve 3022 of the first rotary output element 302 and circumferentially corresponds to the first stop block 314 in the closing sleeve 3022), and the switching element 303 is separated from the second rotary output element 304 (i.e. the switching sleeve 3033 of the switching element 303 is located near the second rotary output element 304 and is not engaged).

The motor is started, the rotation of the rotation input shaft 301 is converted into the rotation of the switching member 303, the rotation of the switching member 303 drives the first rotation output member 302 to rotate, and the second rotation output member 304 does not rotate. The first rotation output piece 302 rotates to drive the closing screw 202 to rotate through the second bevel gear 204, the closing screw 202 rotates to drive the closing nut 203 to move downwards, the closing nut 203 drives the cartridge support 102 to move downwards, and when the magnet 504 on the link mechanism 108 moves downwards to the same height as the hall sensor 503 (namely, the distance between the cartridge support 102 and the anvil support 104 reaches the closing requirement at the moment), the hall sensor 503 is triggered, the hall sensor 503 sends an electric signal to the controller, and the controller controls the motor to stop running. During the closing process, the two sets of linkages 108 are closed simultaneously.

The first switch slider 3031 corresponds to the first stop 314 in the circumferential direction, which may be that the first switch slider 3031 is just in contact with the first stop 314 in the circumferential direction when the switch 303 is in the first position, or that the first switch slider 3031 is spaced from the first stop 314 in the circumferential direction when the switch 303 is in the first position, but when the switch 303 starts to rotate by a certain angle, the switch 303 is in contact with the first stop 314 to push the closing sleeve 3022 to rotate, which is also a driving connection.

And a second step of:

the operator actuates the safety switch 305 distally until the safety switch 305 moves the switch 303 to the second position. At this time, the switching member 303 is disconnected from the first rotary output member 302 (i.e., the first switching slider 3031 of the switching member 303 is located at the distal side of the first stopper 314 and does not circumferentially correspond to the first rotary output member), and the switching member 303 is connected to the second rotary output member 304 in a driving manner (i.e., the switching sleeve 3033 of the switching member 303 is sleeved on the outer periphery of the second switching slider 3041, and the second stopper 318 in the switching sleeve 3033 circumferentially corresponds to the second switching slider 3041).

The second stopper 318 corresponds to the second switching slider 3041 in the circumferential direction, and the second stopper 318 may abut against the second switching slider 3041 in the circumferential direction when the switching member 303 is in the second position, or the second stopper 318 may be spaced apart from the second switching slider 3041 in the circumferential direction when the switching member 303 is in the second position, but the second stopper may abut against the second switching slider 3041 to push the second switching slider 3041 to rotate after the switching member 303 starts to rotate by a certain angle, which is also the driving connection.

And a third step of:

the motor is started, the rotation of the rotation input shaft 301 is converted into the rotation of the switching member 303, the switching member 303 drives the second rotation output member 304 to rotate, and the first rotation output member 302 does not rotate. The second rotation output piece 304 drives the firing screw 106 to rotate, so that the firing nut 107 is driven to move distally along the axial direction to perform firing.

Fourth step:

when firing is desired to be released, the drive motor rotates in the reverse direction (opposite to the direction in the third step), the rotary input shaft 301 rotates in the reverse direction (opposite to the direction in the third step), the switch 303 rotates in the reverse direction (opposite to the direction in the third step), the second rotary output 304 rotates in the reverse direction (opposite to the direction in the third step), the firing screw 106 rotates in the reverse direction (opposite to the direction in the third step), and the firing nut 107 moves proximally back to the home position.

Fifth step:

stopping the motor starts, the operator drives the safety switch 305 to move proximally until the safety switch 305 drives the switching member 303 to move to the first position. The drive motor then rotates in reverse (opposite to the first step), the rotary input shaft 301 rotates in reverse (opposite to the first step), the switching member 303 rotates in reverse (opposite to the first step), the first rotary output member 302 rotates in reverse (opposite to the first step), the second bevel gear 204 in the closure drive mechanism 2 rotates in reverse (opposite to the first step), the closure screw 202 in the closure drive mechanism 2 rotates in reverse (opposite to the first step), the closure nut 203 in the closure drive mechanism 2 moves upward, the cartridge holder 102 moves upward, and the cartridge holder returns to the open state. During the opening process, the two sets of linkages 108 open synchronously.

The embodiment also provides a use method of the linear cutting anastomat, which comprises the following steps:

s1, adjusting the set distance between a nail bin bracket 102 and a nail anvil bracket 104 through a nail height adjusting assembly 5;

s2, connecting the power transmission mechanism 3 with the closing driving mechanism 2 in a driving connection mode;

s3, starting a power source, and starting to close the nail bin assembly 1 when the power source transmits power to the closing driving mechanism 2 through the power transmission mechanism 3;

s4, when the nail bin bracket 102 and the nail anvil bracket 104 are close to a set distance, the nail height adjusting assembly 5 sends an electric signal to the controller, the controller controls the power source to stop working, and the nail bin assembly 1 stops closing.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.

Claims (10)

1. A linear cutting stapler, characterized in that: the device comprises a nail bin assembly (1), a closing driving mechanism (2), a power transmission mechanism (3), a shell (4), a controller, a power source and a nail height adjusting assembly (5), wherein the power source and the nail height adjusting assembly are electrically connected with the controller;

the nail bin assembly (1) comprises a nail bin bracket (102) and a nail anvil bracket (104), wherein the near side of the nail bin bracket (102), the near side of the nail anvil bracket (104), the far side of the power transmission mechanism (3) and the closing driving mechanism (2) are positioned in a shell (4), the closing driving mechanism (2) is connected with the nail bin bracket (102) or is simultaneously connected with the nail bin bracket (102) and the nail anvil bracket (104), the nail bin bracket (102) can be close to or far away from the nail anvil bracket (104), and the nail height adjusting assembly (5) is positioned on the shell (4);

the power source is connected with the power transmission mechanism (3), and the power transmission mechanism (3) is in selective driving connection with the closing driving mechanism (2);

When the power transmission mechanism (3) is in driving connection with the closing driving mechanism (2) and the power source transmits power to the closing driving mechanism (2) through the power transmission mechanism (3), the nail bin assembly (1) starts to be closed;

when the nail bin bracket (102) and the nail anvil bracket (104) are close to a set distance, the nail height adjusting assembly (5) sends an electric signal to the controller, and the controller controls the power source to stop working.

2. The linear cutting stapler of claim 1, wherein: the nail height adjusting assembly (5) comprises a position sensor and a nail height adjusting support (501), a first sliding groove (401) extending along the closing direction of the nail bin assembly (1) is formed in the shell (4), the position sensor is located in the first sliding groove (401) and connected with the nail height adjusting support (501), the nail height adjusting support (501) is stirred, and the position sensor moves up and down along the first sliding groove (401), so that the setting distance between the nail bin support (102) and the nail anvil support (104) is adjusted.

3. The linear cutting stapler of claim 2, wherein: the position sensor is an electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch or hall sensor (503).

4. The linear cutting stapler of claim 2, wherein: the position sensor comprises a Hall sensor (503) located in the first sliding groove (401) and a magnet (504) located on the nail bin assembly (1), the magnet (504) triggers the Hall sensor (503) when the nail bin assembly (1) moves to the same height as the Hall sensor (503), and the Hall sensor (503) sends an electric signal to the controller.

5. The linear cutting stapler of claim 4, wherein: the nail height adjusting assembly (5) further comprises a Hall bracket (502) used for installing the Hall sensor (503);

a guide post is arranged on one side of the Hall bracket (502) opposite to the Hall sensor (503), a clamping groove is formed in one end of the nail height adjusting bracket (501), the guide post is inserted into the clamping groove, the middle part of the nail height adjusting bracket (501) is movably connected with the shell (4) through a rotating shaft, a deflector rod is arranged at the other end of the nail height adjusting bracket (501), when the deflector rod is pushed to enable the nail height adjusting bracket (501) to rotate, the guide post slides in the clamping groove, and meanwhile, the Hall bracket (502) and the Hall sensor (503) move up and down in the first sliding groove (401) through the cooperation of the guide post and the clamping groove;

An opening (402) for the deflector rod to extend out of the casing (4) is formed in the casing (4), and graduation marks are attached to the outer surface of the casing (4) at the opening (402);

the distance from the axis of the rotating shaft in the middle of the nail height adjusting bracket (501) to the deflector rod is larger than the distance from the axis of the rotating shaft in the middle of the nail height adjusting bracket (501) to the clamping groove.

6. The linear cutting stapler of any one of claims 1-5, wherein: the nail anvil bracket (104) is provided with a firing screw (106), and the power transmission mechanism (3) is in selective driving connection with the firing screw (106);

when the power transmission mechanism (3) is in driving connection with the firing screw (106) and the power source transmits power to the firing screw (106) through the power transmission mechanism (3), the nail bin assembly (1) starts firing;

the power transmission mechanism (3) comprises a rotary input shaft (301), a first rotary output piece (302), a switching piece (303), a second rotary output piece (304) and a safety switch (305);

the switching piece (303) is arranged on the rotation input shaft (301) in a manner of being capable of moving between a first position and a second position and being connected with the rotation input shaft (301) in a driving manner, the safety switch (305) is connected with the switching piece (303) in a manner of being rotatable relative to the switching piece (303) and being capable of driving the switching piece (303) to move, the first rotation output piece (302) is connected with the closing driving mechanism (2) in a driving manner, and the second rotation output piece (304) is connected with the firing screw (106) in a driving manner;

When the switching member (303) is in the first position:

the switching element (303) is connected to the first rotary output element (302) in a drive-connection manner, the switching element (303) being separated from the second rotary output element (304);

when the switching member (303) is in the second position:

the switching element (303) is disconnected from the first rotary output element (302), and the switching element (303) is connected to the second rotary output element (304) in a driving manner.

7. The linear cutting stapler of claim 6, wherein: the switching piece (303) comprises a first switching slide (3031), a fixed slide (3032) and a switching shaft sleeve (3033);

the switching shaft sleeve (3033) is sleeved outside the rotary input shaft (301), the rotary input shaft (301) is provided with a second chute (3011) which is radially communicated, the first switching slide block (3031) and the fixed slide block (3032) can be supported in the second chute (3011) in a bidirectional moving way along the axial direction of the rotary input shaft (301), at least one end of the first switching slide block (3031) extends out of the second chute (3011), and both ends of the fixed slide block (3032) extend out of the second chute (3011);

The proximal end of the switching shaft sleeve (3033) is provided with a mounting groove (3034), the fixed sliding block (3032) is further positioned in the mounting groove (3034), and two ends of the fixed sliding block (3032) extending out of the second sliding groove (3011) are connected with the peripheral wall of the switching shaft sleeve (3033) through pin shafts so as to be supported in the mounting groove (3034) of the switching shaft sleeve (3033);

the distal end of the first switch slide (3031) is clamped with the proximal end of the fixed slide (3032) so that the first switch slide (3031) can be supported in the second sliding groove (3011) in a bidirectional movement along the radial direction of the rotation input shaft (301).

8. The linear cutting stapler of claim 7, wherein: the first rotation output piece (302) comprises a first bevel gear (3021) and a closed shaft sleeve (3022), the first bevel gear (3021) is fixedly sleeved on the closed shaft sleeve (3022), and the closed shaft sleeve (3022) is sleeved on the periphery of the rotation input shaft (301);

the closing driving mechanism (2) comprises a closing screw (202), a closing nut (203) and a second bevel gear (204), the first bevel gear (3021) is meshed with the second bevel gear (204), the second bevel gear (204) is fixedly sleeved with the closing screw (202), the closing nut (203) is screwed on the closing screw (202), and the nail bin bracket (102) is fixedly sleeved on the closing nut (203);

The distal end inner wall of the closing sleeve (3022) is provided with at least two first stop blocks (314) which are arranged at intervals in the circumferential direction, the at least two first stop blocks (314) are staggered in diameter, and the first stop blocks (314) and the first switching slide block (3031) are used for forming driving connection of the switching piece (303) and the first rotation output piece (302);

when the switching piece (303) is positioned at a first position, the first switching slide block (3031) and the first stop block (314) are circumferentially corresponding;

the first switch slide (3031) is distal to the first stop (314) when the switch (303) is in the second position.

9. The linear cutting stapler of claim 7, wherein: the firing screw (106) comprises a transition section and a thread section which are sequentially connected and coaxial from near to far, the proximal end of the transition section is sleeved with the distal end of the rotation input shaft (301) in a bidirectional rotation manner, and a third sliding groove (1061) which is radially communicated is arranged on the transition section;

the second rotary output piece (304) is a second switching slide block (3041), the second switching slide block (3041) is movably supported in the third sliding groove (1061) along the radial direction of the firing screw (106), and at least one end of the second switching slide block (3041) extends out of the third sliding groove (1061);

The inner wall of the distal end of the switching shaft sleeve (3033) is provided with at least two second stop blocks (318) which are circumferentially arranged at intervals, the at least two second stop blocks (318) are staggered in diameter, and the second stop blocks (318) and the second switching sliding blocks (3041) are used for forming driving connection of the switching piece (303) and the second rotary output piece (304);

when the switching piece (303) is positioned at the first position, the second stop block (318) is positioned at the near side of the second switching sliding block (3041);

when the switching piece (303) is located at the second position, the second stop block (318) and the second switching sliding block (3041) are circumferentially corresponding.

10. A method of using the linear cutting stapler of any one of claims 1-5, wherein: the using method comprises the following steps:

s1, adjusting the set distance between the nail bin bracket (102) and the nail anvil bracket (104) through the nail height adjusting assembly (5);

s2, connecting the power transmission mechanism (3) and the closed driving mechanism (2) in a driving connection mode;

s3, starting the power source, and starting to close the nail bin assembly (1) when the power source transmits power to the closing driving mechanism (2) through the power transmission mechanism (3);

S4, when the nail bin bracket (102) and the nail anvil bracket (104) are close to a set distance, the nail height adjusting assembly (5) sends an electric signal to the controller, the controller controls the power source to stop working, and the nail bin assembly (1) stops closing.

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