A linear cutting stapler and method of using same

Abstract

This invention relates to a linear stapler and its method of use, comprising a staple cartridge assembly, a closure drive 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 staple cartridge assembly includes a staple cartridge bracket and a staple anvil bracket. The power source is connected to the power transmission mechanism, which forms a selective drive connection with the closure drive mechanism. When the power transmission mechanism is drive-connected to the closure drive mechanism and the power source transmits power to the closure drive mechanism through the power transmission mechanism, the staple cartridge assembly begins to close. When the staple cartridge bracket and the staple anvil bracket approach a set distance, the staple height adjustment assembly sends an electrical signal to the controller, and the controller controls the power source to stop working. Its advantage is that, due to the use of the staple height adjustment assembly, the linear stapler of this invention, compared with the prior art, can achieve electrical control of the closing height of the stapler, meeting the forming height requirements of different staples.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a linear cutting stapler and its method of use. Background Technology

[0002] In general surgical procedures, linear staplers are commonly used to cut and close tissues. Specifically, the distal end of the stapler has a cartridge and an anvil. When the cartridge and anvil are separated, the tissue to be cut is placed between the cartridge and anvil. The tissue is compressed appropriately by adjusting the distance between the cartridge and anvil. The stapler fires when the distance between the cartridge and anvil reaches a safe range for effective cutting and suturing.

[0003] The inventors of this application hope to create a linear cutting stapler to solve the problem of adjusting the closing height of the stapler. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a linear cutting stapler and its usage method, which solves the technical problem of how to adjust the closing height of the linear cutting stapler to meet the forming height of staples with different requirements.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, embodiments of the present invention provide a linear cutting stapler, including a staple cartridge assembly, a closing drive mechanism, a power transmission mechanism, a housing, a controller, and a power source and a staple height adjustment assembly electrically connected to the controller;

[0009] The staple cartridge assembly includes a staple cartridge bracket and a staple anvil bracket. The proximal side of the staple cartridge bracket, the proximal side of the staple anvil bracket, the distal side of the power transmission mechanism, and the closing drive mechanism are located in the housing. The closing drive mechanism is connected to the staple cartridge bracket or simultaneously connected to the staple cartridge bracket and the staple anvil bracket, enabling the staple cartridge bracket to approach or move away from the staple anvil bracket. The staple height adjustment assembly is located on the housing.

[0010] The power source is connected to the power transmission mechanism, and the power transmission mechanism forms a selectable drive connection with the closed drive mechanism;

[0011] When the power transmission mechanism is connected to the closing drive mechanism and the power source transmits power to the closing drive mechanism through the power transmission mechanism, the stud cartridge assembly begins to close.

[0012] When the staple cartridge bracket and the staple anvil bracket approach the set distance, the staple height adjustment component sends an electrical signal to the controller, and the controller controls the power source to stop working.

[0013] Optionally, the nail height adjustment assembly includes a position sensor and a nail height adjustment bracket. The housing is provided with a first slide groove extending along the closing direction of the nail cartridge assembly. The position sensor is located in the first slide groove and connected to the nail height adjustment bracket. By moving the nail height adjustment bracket, the position sensor moves up and down along the first slide groove, thereby adjusting the set distance between the nail cartridge bracket and the anvil bracket.

[0014] Optionally, the position sensor may be an electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, or Hall sensor.

[0015] Optionally, the position sensor includes a Hall sensor located in the first slide and a magnet located on the staple cartridge assembly. When the magnet moves with the staple cartridge assembly to the same height as the Hall sensor, it triggers the Hall sensor, which then sends an electrical signal to the controller.

[0016] Optionally, the nail height adjustment assembly also includes a Hall bracket for mounting the Hall sensor;

[0017] The Hall bracket has a guide post on the side facing away from the Hall sensor. One end of the nail height adjustment bracket has a slot, and the guide post is inserted into the slot. The middle part of the nail height adjustment bracket is movably connected to the housing through a rotating shaft. The other end of the nail height adjustment bracket has a lever. When the lever is pushed to rotate the nail height adjustment bracket, the guide post slides in the slot. At the same time, the Hall bracket and the Hall sensor move up and down in the first sliding groove through the cooperation of the guide post and the slot.

[0018] The housing has an opening for the lever to extend out of the housing, and the outer surface of the housing has scale markings affixed to the opening.

[0019] Optionally, the distance from the axis of the rotating shaft in the middle of the nail height adjustment bracket to the lever is greater than the distance from the axis of the rotating shaft in the middle of the nail height adjustment bracket to the slot.

[0020] Optionally, the anvil support has a firing screw, and the power transmission mechanism is selectively driven to the firing screw;

[0021] When the power transmission mechanism is connected to the firing screw drive and the power source transmits power to the firing screw through the power transmission mechanism, the cartridge assembly begins to fire.

[0022] The power transmission mechanism includes a rotary input shaft, a first rotary output component, a switching component, a second rotary output component, and a safety switch;

[0023] The switching element is mounted on the rotary input shaft in a manner that allows it to move between a first position and a second position and is driven to be connected to the rotary input shaft. The safety switch is connected to the switching element in a manner that allows it to rotate relative to the switching element and can drive the switching element to move. The first rotary output element is connected to the closing drive mechanism in a manner that drives rotation. The second rotary output element is connected to the firing screw in a manner that drives rotation.

[0024] When the switching element is in the first position:

[0025] The switching element is connected to the first rotary output element by a drive connection, and the switching element is separate from the second rotary output element;

[0026] When the switching element is in the second position:

[0027] The switching component is disconnected from the first rotary output component, and the switching component is connected to the second rotary output component by a drive connection.

[0028] Optionally, the switching component includes a first switching slider, a fixed slider, and a switching bushing;

[0029] The switching sleeve is fitted outside the rotary input shaft. The rotary input shaft is provided with a radially through second slide groove. The first switching slider and the fixed slider can move bidirectionally along the axial direction of the rotary input shaft and are supported in the second slide groove. At least one end of the first switching slider extends out of the second slide groove, and both ends of the fixed slider extend out of the second slide groove.

[0030] The near end of the switching bushing is provided with a mounting groove, the fixed slider is also located in the mounting groove, and the two ends of the fixed slider extending out of the second slide groove are connected to the peripheral wall of the switching bushing through pins, thereby being supported in the mounting groove of the switching bushing;

[0031] The distal end of the first switching slider engages with the proximal end of the fixed slider, allowing the first switching slider to move bidirectionally along the radial direction of the input shaft and be supported in the second slide groove.

[0032] Optionally, the first rotation output component includes a first bevel gear and a closed bushing, wherein the first bevel gear is fixed on the closed bushing and the closed bushing is sleeved around the rotation input shaft;

[0033] The closing drive mechanism includes a closing screw, a closing nut, and a second bevel gear. The first bevel gear meshes with the second bevel gear, the second bevel gear is fixedly sleeved with the closing screw, the closing nut is screwed onto the closing screw, and the staple cartridge bracket is sleeved onto the closing nut.

[0034] The inner wall of the distal end of the closed bushing has at least two circumferentially spaced first stops, which are offset along the diameter. The first stops and the first switching slider are used to form a drive connection between the switching element and the first rotation output element.

[0035] When the switching element is in the first position, the first switching slider and the first stop block are circumferentially aligned.

[0036] When the switching element is in the second position, the first switching slider is located on the far side of the first stop.

[0037] Optionally, the firing screw includes a transition section and a threaded section connected sequentially and coaxially from near to far. The near end of the transition section is rotatably sleeved with the far end of the rotary input shaft in both directions. The transition section is provided with a radially penetrating third slide groove.

[0038] The second rotary output component is a second switching slider, which is supported in a third slide groove and can move radially along the firing screw. At least one end of the second switching slider extends out of the third slide groove.

[0039] The inner wall of the distal end of the switching bushing has at least two second stops arranged circumferentially, the at least two second stops being offset along the diameter, the second stops and the second switching slider being used to form a drive connection between the switching element and the second rotation output element;

[0040] When the switching element is in the first position, the second stop is located near the second switching slider;

[0041] When the switching element is in the second position, the second stop and the second switching slider are circumferentially aligned.

[0042] Secondly, embodiments of the present invention provide a method of using the linear cutting stapler described above, the method comprising the following steps:

[0043] S1. Adjust the set distance between the staple cartridge bracket and the staple anvil bracket using the staple height adjustment component;

[0044] S2. Connect the power transmission mechanism and the closed drive mechanism in a drive connection manner;

[0045] S3. When the power source is started, the power source transmits power to the closing drive mechanism through the power transmission mechanism, and the staple cartridge assembly begins to close.

[0046] S4. When the staple cartridge bracket and the anvil bracket approach the set distance, the staple height adjustment component sends an electrical signal to the controller, and the controller controls the power source to stop working, and the staple cartridge component stops closing.

[0047] (III) Beneficial Effects

[0048] The beneficial effects of this invention are as follows: The linear cutting stapler of this invention, due to the connection between the power source and the power transmission mechanism, and the selective driving connection between the power transmission mechanism and the closing drive mechanism; when the power transmission mechanism and the closing drive mechanism are connected and the power source transmits power to the closing drive mechanism through the power transmission mechanism, the staple cartridge assembly begins to close; when the staple cartridge support and the anvil support approach the set distance, the staple height adjustment component sends an electrical signal to the controller, and the controller controls the power source to stop working. Compared with the prior art, it can achieve electrical control of the closing height of the stapler and can more precisely adjust the closing height of the staple cartridge assembly, thereby meeting the forming height requirements of different staples to adapt to suturing surgeries of human tissues of different thicknesses, greatly improving the safety of the surgical procedure. Attached Figure Description

[0049] Figure 1 This is an exploded view of an embodiment of the linear cutting stapler of the present invention;

[0050] Figure 2 for Figure 1 A three-dimensional schematic diagram of the closed drive mechanism, power transmission mechanism, and firing screw in the figure;

[0051] Figure 3 for Figure 1 A three-dimensional schematic diagram of the closed drive mechanism, power transmission mechanism and firing screw from another perspective;

[0052] Figure 4 This is a partial cross-sectional schematic diagram of the linear cutting anastomosis device of the present invention, wherein the switching element is located in the second position;

[0053] Figure 5 for Figure 1 A perspective view of the housing, nail height adjustment assembly, and linkage mechanism.

[0054] Figure 6 for Figure 1 The housing, nail height adjustment assembly, and linkage mechanism are shown from another perspective, with the housing showing an inner first groove for housing the nail height adjustment assembly.

[0055] [Explanation of Labels in the Attached Image]

[0056] 1: Staple cartridge assembly; 101: Staple cartridge; 102: Staple cartridge bracket; 1021: First elongated slot; 1022: First circular hole; 103: Anvil; 104: Anvil bracket; 1041: Long fixing lug; 1042: Short fixing lug; 105: Anvil head; 106: Activating screw; 1061: Third sliding groove; 107: Activating nut; 1071: Cutting blade; 108: Linkage mechanism; 1081: First connecting rod; 1082: Second connecting rod; 1084: Fixing pin; 1085: Sliding pin;

[0057] 2: Closed drive mechanism; 201: Suspension; 2011: Connecting plate; 2012: Second long slot; 2013: Second round hole; 202: Closed screw; 203: Closed nut; 204: Second bevel gear; 205: Top bearing; 206: Bottom bearing;

[0058] 3: Power transmission mechanism; 301: Rotary input shaft; 3011: Second slide groove; 3012: First shaft section; 3013: Second shaft section; 3014: Third shaft section; 3015: Fourth shaft section;

[0059] 302: First rotating output component; 3021: First bevel gear; 3022: Closing bushing;

[0060] 303: Switching component; 3031: First switching slider; 3032: Fixed slider; 3033: Switching bushing; 3034: Mounting slot; 304: Second rotation output component; 3041: Second switching slider;

[0061] 305: Safety switch; 3051: Toggle block; 3052: Clamp; 3053: Guide rod;

[0062] 306: Input shaft bearing housing; 307: First shaft sleeve housing; 308: Second shaft sleeve housing;

[0063] 309: Screw; 310: Snap ring; 311: First bearing; 312: Second bearing; 313: Flange sleeve; 314: First stop; 315: First rotating sleeve; 316: Second rotating sleeve; 317: Third rotating sleeve; 318: Second stop;

[0064] 4: Housing; 401: First groove; 402: Opening;

[0065] 5: Nail height adjustment component; 501: Nail height adjustment bracket; 502: Hall bracket; 503: Hall sensor; 504: Magnet. Detailed Implementation

[0066] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this description, the side closer to the doctor during use is defined as "near," and the side closer to the patient is defined as "far."

[0067] Reference Figure 1 , Figure 2 and Figure 3This embodiment provides a linear cutting stapler. The linear cutting stapler includes a staple cartridge assembly 1, a closing drive mechanism 2, a power transmission mechanism 3, a housing 4, a controller, a staple height adjustment assembly 5 electrically connected to the controller, and a power source electrically connected to the controller. The housing 4 is generally rectangular in shape and consists of two parts, left and right, which are fixed together by fixing pins or screws.

[0068] The staple cartridge assembly 1 includes a staple cartridge bracket 102 with a staple cartridge 101, an anvil bracket 104 with an anvil 103, a firing screw 106, and a firing nut 107 with a cutting blade 1071. The proximal sides of the staple cartridge bracket 102 and the anvil bracket 104 are located inside the housing 4, and the distal sides of the staple cartridge bracket 102 and the anvil bracket 104 are located outside the housing 4. An anvil head 105 is mounted on the distal end of the anvil bracket 104. The specific structure and working principle of the staple cartridge assembly 1 are the same as those in the prior art; therefore, structures not related to the movement of the closing drive mechanism 2 and the power transmission mechanism 3 of the present invention will not be described in detail here.

[0069] The closing drive mechanism 2, located within the housing 4, includes a suspension 201, a closing screw 202, a closing nut 203, a second bevel gear 204, a top bearing 205, and a bottom bearing 206. The suspension 201 is inverted U-shaped, and the bottom of the suspension 201 extends distally to form a connecting plate 2011, which is fixedly connected to the proximal side of the anvil bracket 104.

[0070] The power transmission mechanism 3 includes a rotary input shaft 301, a first rotary output component 302, a switching component 303, a second rotary output component 304, a safety switch 305, an input shaft bearing housing 306, a first bushing housing 307, a second bushing housing 308, a first bearing 311, a first rotating bushing 315, a second rotating bushing 316, and a third rotating bushing 317. The first bearing 311, the first rotary output component 302, the input shaft bearing housing 306, the first bushing housing 307, the first rotating bushing 315, and the second rotating bushing 316 are located in the suspension 201, while the second rotary output component 304, the second bushing housing 308, and the third rotating 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.

[0071] In this embodiment, a first rotation output component 302 is sleeved around the rotation input shaft 301. The first rotation output component 302 includes a first bevel gear 3021 and a closed bushing 3022. The inner hole of the first bevel gear 3021 has a plurality of spaced arc teeth, and the outer wall of the proximal end of the closed bushing 3022 has a plurality of arc grooves that mesh with the plurality of arc teeth, thereby drivingly connecting the first bevel gear 3021 and the closed bushing 3022. The arc-shaped tooth grooves can increase the transmission strength and reduce the wear of the tooth grooves.

[0072] The input shaft bearing housing 306 and the first bushing housing 307 are fixed in the suspension 201 by screws 309. The input shaft bearing housing 306 and the first bushing housing 307 are rectangular in shape. This shape allows the input shaft bearing housing 306 and the first bushing housing 307 to be fixed more stably in the suspension 201. Especially when there is a mounting surface in the suspension 201 that is compatible with the input shaft bearing housing 306 and the first bushing housing 307, the input shaft bearing housing 306 and the first bushing housing 307 will not rotate unnecessarily. At the same time, the rectangular bearing housing and bushing housing are also easier to fix to the suspension 201.

[0073] The first bearing 311, the first rotating bushing 315, and the second rotating bushing 316 are coaxial. The first rotating output component 302 and the rotating input shaft 301 are coaxial. The second rotating bushing 316 is placed in the first bushing seat 307. The distal end of the closed bushing 3022 is bidirectionally rotatably supported in the first bushing seat 307 by the second rotating bushing 316. The proximal end of the closed bushing 3022 and the first bevel gear 3021 are located between the input shaft bearing seat 306 and the first bushing seat 307. The first bearing 311 is fixed in the input shaft bearing seat 306. The first rotating bushing 315 is placed in the inner hole of the closed bushing 3022. The rotating input shaft 301 passes through the first bearing 311, the first rotating bushing 315, and the closed bushing 3022, and the first bearing 311 and the first rotating bushing 315 form a bidirectional rotating support for the rotating input shaft 301. The axis of the rotating input shaft 301 is fixed by the first bearing 311 and the first rotating bushing 315.

[0074] It should be noted that the axis of the rotating input shaft 301 is perpendicular to the closing direction and parallel to the axis of the firing screw 106, and the rotating input shaft 301 and the closing bushing 3022 do not constitute any driving connection.

[0075] Specifically, the proximal end of the rotation input shaft 301 is used to connect to a power source capable of outputting rotation, such as a motor, to introduce rotational power into the power transmission mechanism 3. Of course, in other embodiments, the rotation input shaft 301 may also be the output shaft of the power source itself.

[0076] Combination Figure 4As shown, the rotating input shaft 301 includes, from near to far, a first shaft segment 3012, a second shaft segment 3013, a third shaft segment 3014, and a fourth shaft segment 3015, which are connected in sequence and coaxial. The diameter of the first shaft segment 3012 is smaller than the diameter of the second shaft segment 3013. A retaining ring 310 is provided at the connection between the first shaft segment 3012 and the second shaft segment 3013. The retaining ring 310 is fixed in an annular groove on the inner wall of the input shaft bearing seat 306. The diameter of the second shaft segment 3013 is smaller than the diameter of the third shaft segment 3014, that is, a first annular end face is formed between the second shaft segment 3013 and the third shaft segment 3014. The first bearing 311 is axially limited between the retaining ring 310 and the first annular end face. The diameter of the third shaft segment 3014 is larger than the diameter of the fourth shaft segment 3015, that is, a second annular end face is formed between the third shaft segment 3014 and the fourth shaft segment 3015. The inner hole of the closed bushing 3022 is provided with a third annular end face. The first rotating bushing 315 is axially limited between the second annular end face and the third annular end face. The diameter of the proximal part of the closed bushing 3022 is larger than the diameter of the distal part of the closed bushing 3022, that is, a fourth annular end face is formed between the proximal part and the distal part of the closed bushing 3022. The distal end of the first bushing seat 307 is provided with an inward annular retaining edge. The second rotating bushing 316 is axially limited between the aforementioned annular retaining edge and the fourth annular end face.

[0077] In this embodiment, the second bushing 308 is fixed to the anvil bracket 104 by screws 309. The second bushing 308 is rectangular in shape, which allows it to be more stably fixed in the anvil bracket 104. Especially when the anvil bracket 104 has a mounting surface that is compatible with the second bushing 308, the second bushing 308 will not rotate unnecessarily. At the same time, the rectangular bushing is easier to fix to the anvil bracket 104.

[0078] Specifically, the firing screw 106 comprises a transition section and a threaded section connected sequentially and coaxially from near to far. The distal end of the threaded section is rotatably connected to the anvil bracket 104 via a flange bushing 313. A third rotating bushing 317 is placed in the second bushing seat 308. The transition section of the firing screw 106 passes through the third rotating bushing 317, which forms a bidirectional rotational support for the firing screw 106. The axis of the firing screw 106 is fixed through the third rotating bushing 317 and the flange bushing 313. A second bearing 312 is provided 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 the diameter of the transition section, i.e., a fifth annular end face is formed between the threaded section and the transition section. The thrust bearing is axially limited between the fifth annular end face and the second bushing seat 308. The second bushing 308 has an inwardly facing annular flange at its near end, and the third rotating bushing 317 is axially limited between the aforementioned annular flange and the second bearing 312.

[0079] The distal end of the rotary input shaft 301 (i.e., the distal end of the fourth shaft segment 3015) and the proximal end of the firing screw 106 (i.e., the proximal end of the transition segment) can be rotatably connected in both directions. That is, the proximal end of the transition segment of the firing screw 106 extends into the circular blind hole of the fourth shaft segment 3015 of the rotary input shaft 301, but there is a gap between the inner wall of the circular blind hole and the proximal end of the transition segment, and the two do not form any driving connection.

[0080] In this embodiment, the first rotating output component 302 and the staple cartridge bracket 102 are connected by the closing drive mechanism 2 to realize the conversion of the rotation of the first rotating output component 302 into the up and down movement of the staple cartridge bracket 102. The up and down movement of the staple cartridge bracket 102 forms the opening and closing of the staple cartridge bracket 102 and the anvil bracket 103.

[0081] Specifically, an input shaft bearing seat 306 is fixedly installed at the bottom opening of the suspension 201. The upper wall of the input shaft bearing seat 306 has a mounting hole, and the bottom bearing 206 is fixed in the mounting hole. The bottom end of the closing screw 202 is bidirectionally rotatably supported on the input shaft bearing seat 306 via the bottom bearing 206. The top bearing 205 is a thrust bearing, fixed to the top of the suspension 201, and the top end of the closing screw 202 is fixed to the suspension 201 via the top bearing 205. A closing nut 203 is screwed onto the closing screw 202, and the closing nut 203 is fixedly connected to the proximal end of the stud magazine bracket 102. A second bevel gear 204 is sleeved on the closing screw 202, and the second bevel gear 204 meshes with the first bevel gear 3021 of the first rotating output component 302. Therefore, the axes of the second bevel gear 201, the closing screw 202, and the closing nut 203 are perpendicular to the axis of the first rotation output component 302. When the first rotation output component 302 rotates, the second bevel gear 204 and the closing screw 202 also rotate, causing the closing nut 203 to drive the staple cartridge support 102 to move up and down. Of course, in other embodiments, the first rotation output component 302 can also be a common transmission gear, and the power can be transmitted to the staple cartridge support 102 using a corresponding closed drive mechanism 2.

[0082] In this embodiment, the switching component 303 includes a first switching slider 3031, a fixed slider 3032, and a switching bushing 3033. The switching bushing 3033 is sleeved on the outside of the fourth shaft segment 3015 of the rotary input shaft 301 and is coaxial with the rotary input shaft 301 and the first rotary output component 302. The first bushing seat 307 is located near the switching component 303, and the second bushing seat 308 is located far from the switching component 303. The fourth shaft segment 3015 of the rotary input shaft 301 is provided with a radially penetrating second groove 3011, that is, the second groove 3011 is opened along the diameter direction of the fourth shaft segment and penetrates the peripheral wall of the fourth shaft segment 3015, and the second groove 3011 is located in the middle of the fourth shaft segment 3015. The first switching slider 3031 and the fixed slider 3032 are bidirectionally movable along the axial direction of the rotary input shaft 301 and supported in the second slide groove 3011. At least one end of the first switching slider 3031 extends out of the second slide groove 3011, and both ends of the fixed slider 3032 extend out of the second slide groove 3011. A mounting groove 3034 is provided at the proximal end of the switching sleeve 3033. The fixed slider 3032 is located within the mounting groove 3034, and both ends of the fixed slider 3032 extending out of the second slide groove 3011 are connected to the peripheral wall of the switching sleeve 3033 via pins. The distal end of the first switching slider 3031 engages with the proximal end of the fixed slider 3032, allowing the first switching slider 3031 to bidirectionally move along the radial direction of the rotary input shaft 301 and be supported in the second slide groove 3011.

[0083] Specifically, the first switching slider 3031 and the fixed slider 3032 are plate-shaped. The distal end of the first switching slider 3031 is provided with a T-shaped connector, and the proximal end of the fixed slider 3032 is provided with a T-shaped locking hole that penetrates the fixed slider 3032 along its thickness direction. The T-shaped connector engages with the T-shaped locking hole, allowing the first switching slider 3031 to move bidirectionally along the radial direction of the rotary input shaft 301 and be supported in the second slide groove 3011. The two ends of the fixed slider 3032 extending out of the second slide groove 3011 are provided with pin holes that penetrate the fixed slider 3032 along its thickness direction. The fixed slider 3032 is supported on the switching sleeve 3033 by pins passing through the pin holes. To facilitate the installation of the fixed slider 3032, support holes are provided on both sides of the mounting groove 3034 in the switching sleeve 3033 to facilitate the installation of the pins. Furthermore, the fixed slider 3032 allows the switching sleeve 3033 to move between a first position and a second position along the axis of the rotation input shaft 301 while maintaining a driving connection between the switching sleeve 3033 and the rotation input shaft 301. The length of the second slide groove 3011 allows the switching member 303 to form a driving connection only with the first power output member 302 in the first position, and only with the second power output member 304 in the second position. In this embodiment, the first position is located near the second position. Additionally, the proximal end of the first switching slider 3031 tapers, and inclined surfaces are formed on both the upper and lower surfaces of the proximal end of the first switching slider 3031.

[0084] The inner wall of the distal end of the closed bushing 3022 has three circumferentially evenly spaced first stops 314, which are staggered along the diameter, meaning that no two first stops 314 are on the same diameter. The circumferential side of each first stop 314 can be used to abut against the circumferential side of the first switching slider 3031, thereby forming a drive connection in which the closed bushing 3022 and the switching member 303 can move relative to each other in both directions and can be driven to rotate in both directions. In other words, when the switching member 303 is in the first position, the first switching slider 3031 extends into the closed bushing 3022 and abuts against the circumferential side of the first stop 314 to push the first power output member 302 to rotate. When the switching member 303 is in the second position, the first switching slider 3031 is pulled out from the closed bushing 3022 (that is, at this time the closed bushing 3022 is located near the first switching slider 3031 without forming an engagement).

[0085] Corresponding to the tapered design of the first switching slider 3031, the inner surface of the distal end of the first stop 314 on the closed bushing 3022 is provided with an outwardly inclined surface, the same inclination angle as the inclined surface on the first switching slider 3031. The purpose of this design is that the angle at which the closed bushing 3022 stops after each rotation is different. If only one first stop 314 is provided, the stopping position of the first stop 314 might be directly opposite the first switching slider 3031. In this case, during the movement of the switching element 303 towards the first position, the first switching slider 3031 would axially abut against the first stop 314, preventing the switching element 303 from reaching the first position to form a driving connection with the first rotation output element 302. The multiple first stops 314, which are staggered along the diameter of the closed bushing 3022, together with the first switching slider 3031, are radially bidirectionally movable. When the first switching slider 3031 is directly opposite one of the first stops 314, as the switching bushing 3033 moves axially, the first switching slider 3031 will be radially pushed inward by the first stop 314 directly opposite it (the inclined surfaces on the first switching slider 3031 and the first stop 314 facilitate this pushing) so as not to prevent the first switching slider 3031 from being inserted into the closed bushing 3022 to form a driving connection with the closed bushing 3022. The other end of the first switching slider 3031 will protrude more, better corresponding circumferentially with the first stop 314 on the other side. Since the three first stops 314 are evenly distributed, while the first switching slider 3031 only has upper and lower ends, there may be a certain distance between the first switching slider 3031 and the first stop 314 corresponding to it in the same direction. When the first switching slider 3031 rotates again initially, it will idle for a certain distance. Only when the first switching slider 3031 rotates to circumferentially push against the first stop 314 will it push the closing bushing 3022 to rotate. This idle distance will only cause the closing time of the staple cartridge bracket 102 and the anvil bracket 104 to be slightly earlier or later, without affecting the sewing effect. Therefore, this design ensures smooth switching between the closed and firing states.

[0086] In this embodiment, a second rotation output component 304 is installed on the transition section of the firing screw 106. The second rotation output component 304 and the switching component 303 form a selectable drive connection, driving the firing screw 106 to rotate. The firing nut 107 is screwed onto the firing screw 106, thereby converting the bidirectional rotation of the firing screw 106 into the bidirectional movement of the firing nut 107, realizing the firing action.

[0087] Specifically, the second rotary output component 304 includes a second switching slider 3041. A radially penetrating third groove 1061 is provided on the transition section of the firing screw 106; that is, the third groove 1061 is formed along the diameter of the transition section, penetrating the peripheral wall of the transition section. The third groove 1061 itself is a rectangular groove, located in the middle of the transition section. The second switching slider 3041 is supported in the third groove 1061 and is movably supported in both directions radially along the transition section of the firing screw 106, with at least one end of the second switching slider 3041 extending out of the third groove 1061. In this embodiment, both ends of the second switching slider 3041 extend out of the third groove 1061.

[0088] Specifically, the second switching slider 3041 is plate-shaped, and has a slotted hole (preferably an elongated hole) penetrating its thickness direction. The length of the slotted hole is radially along the transition section. The second switching slider 3041 is supported on the transition section of the firing screw 106 by a circular rod passing through the slotted hole. For ease of installation, support holes are provided on both sides of the third groove 1061 in the transition section to facilitate the installation of the circular rod on the second switching slider 3041, allowing both ends of the circular rod to pass through the support holes on the sidewall of the transition section. Furthermore, the proximal end of the second switching slider 3041 tapers, and both the upper and lower surfaces of the proximal end of the second switching slider 3041 form inclined surfaces.

[0089] The inner wall of the distal end of the switching sleeve 3033 has three circumferentially evenly spaced second stops 318, which are staggered along the diameter, meaning that no two second stops 318 are on the same diameter. The circumferential side of each second stop 318 can be used to abut against the circumferential side of the second switching slider 3041, thereby forming a drive connection between the switching sleeve 3033 and the second rotation output member 304, which can move relative to each other in both directions and drive bidirectional rotation. In other words, when the switching member 303 is in the first position, the switching member 303 is separated from the second rotation output member 304 (i.e., the switching sleeve 3033 is located near the second switching slider 3041 without forming an engagement). When the switching member 303 is in the second position, the switching sleeve 3033 is sleeved on the second switching slider 3041, and the second stops 318 on the inner wall of the switching sleeve 3033 abut against the circumferential side of the second switching slider 3041, which is used to push the second power output member 304 and the firing nut 107 to rotate.

[0090] Corresponding to the tapered design of the second switching slider 3041, the inner surface of the distal end of the second stop 318 on the switching sleeve 3033 is provided with an outwardly inclined surface, the same angle of inclination as the inclined surface on the second switching slider 3041. The purpose of this design is that the angle at which the switching sleeve 3033 stops after rotating in the first position is different each time. If only one second stop 318 is provided, the stopping position of the second stop 318 might be directly opposite the second switching slider 3041. In this case, during the movement of the switching sleeve 3033 to the second position, the second stop 318 would axially abut against the second switching slider 3041, preventing the switching sleeve 3033 from reaching the second position to form a driving connection with the second rotation output component 304. The multiple second stops 318, which are staggered along the diameter of the switching sleeve 3033, are radially bidirectionally movable in conjunction with the second switching slider 3041. When the second switching slider 3041 is directly opposite one of the second stops 318, as the switching sleeve 3033 moves axially, the second switching slider 3041 is radially pushed inward by the second stop 318 directly opposite it (the inclined surfaces on the second switching slider 3041 and the second stop 318 facilitate this pushing) so as not to hinder the switching sleeve 3033 from moving to the second position and forming a driving connection with the second switching slider 3041. The other end of the second switching slider 3041 will protrude more, better corresponding circumferentially with the second stop 318 on the other side. Since the three second stops 318 are evenly distributed, while the second switching slider 3041 only has its top and bottom ends, there may be a certain distance between the second switching slider 3041 and the corresponding second stops 318. When the switching sleeve 3033 rotates again initially, it will idle for a certain distance. Only when the second stops 318 rotate to circumferentially push against the second switching slider 3041 will the firing screw 106 be pushed to rotate. This idle distance will only cause the ejection time of the firing pin to be slightly earlier or later, without affecting the sewing effect. Therefore, this design ensures smooth switching between the closed and firing states.

[0091] Furthermore, an annular groove is provided on the outer wall of the switching sleeve 3033. The safety switch 305 includes a toggle block 3051 and a circular clamp 3052. The clamp 3052 is fitted into the annular groove, and both ends of the clamp 3052 are fixedly connected to the toggle block 3051. This forms a connection between the safety switch 305 and the switching sleeve 3033 in a manner that allows the switch sleeve 3033 to rotate relative to it and drive it to move bidirectionally between a first position and a second position. In this embodiment, the safety switch 305 provides manual input switching power. In addition, a guide rod 3053 is provided between the first sleeve seat 307 and the second sleeve seat 308. The axis of the guide rod 3053 is parallel to the axis of the switching sleeve 3033, and the guide rod 3053 passes through the toggle block 3051, guiding the toggle block 3051. Furthermore, a slide for the toggle block 3051 to extend out of the housing 4 is provided on the housing 4.

[0092] In this embodiment, the staple cartridge assembly 1 further includes two sets of linkage mechanisms 108 located on the left and right sides of the staple cartridge bracket 102. Each set of linkage mechanisms 108 includes a first link 1081 and a second link 1082 that are hinged together. The first link 1081 and the second link 1082 are of equal length, and the hinge position of the first link 1081 and the second link 1082 is located at the center of the length of the two links, thereby dividing the two links into two downward isosceles triangles.

[0093] The staple cartridge bracket 102 is provided with a first elongated groove 1021 and a first round hole 1022 that run from left to right. The connecting plate 2011 of the suspension 201 is provided with a second elongated groove 2012 and a second round hole 2013 that run from left to right. The anvil bracket 104 has two symmetrical long fixing ears 1041 and two symmetrical short fixing ears 1042. The long fixing ears 1041 are provided with a third elongated groove that coincides with the position of the second elongated groove 2012. The short fixing ears 1042 are provided with a third round hole that coincides with the second round hole 2013.

[0094] In both sets of linkage mechanisms 108, the top ends of the first link 1081 are hinged to the same sliding pin 1085 passing through the first long slot 1021 on the staple cartridge bracket 102. The bottom ends of the first link 1081 in both sets of linkage mechanisms 108 are respectively hinged to the second round hole 2013 and the third round hole of the short fixed ear 1042 via fixing pins 1084. The top ends of the second link 1082 in both sets of linkage mechanisms 108 are respectively hinged to the first round hole 1022 on the staple cartridge bracket 102 via fixing pins 1084. The bottom ends of the second link 1082 in both sets of linkage mechanisms 108 are respectively hinged to the second long slot 2012 and the third long slot of the two long fixed ears 1031 via sliding pins 1085. With the above structure, the top end of the first link 1081 can rotate and slide along the staple cartridge bracket 102, and the bottom end of the second link 108 can rotate and slide along the anvil bracket 104. This prevents the staple cartridge bracket 102 from tilting or becoming horizontally misaligned relative to the anvil bracket 104 during vertical movement, ensuring that the staple cartridge bracket 102 and the anvil bracket 104 are parallel when opening and closing. At the same time, it reduces the pressure at the connection between the staple cartridge bracket 102 and the closing nut 203, allowing the power transmission mechanism 3 to be designed with more optimization and simplification without considering the pressure at this point.

[0095] Furthermore, the aforementioned long fixing ear 1041 is located near the second shaft sleeve 308, corresponding axially to the position of the fourth shaft segment 3015 of the rotary input shaft 301, with the connecting pin in the long fixing ear 1041 located below the fourth shaft segment 3015. The aforementioned short fixing ear 1042 is located far from the second shaft sleeve 308, with the connecting pin in the short fixing ear 1042 located laterally below the anvil 103 on the anvil bracket 104. This arrangement makes the axial structure of the stapler compact, reducing the size of the stapler.

[0096] Of course, in other embodiments, the positions of the long fixed ear 1041 and the short fixed ear 1042 can be interchanged. That is, the bottom ends of the first connecting rods 1081 in the two sets of linkage mechanisms 108 are respectively hinged to the long slot of the long fixed ear 1041 by a sliding pin. The bottom ends of the second connecting rods 1082 in the two sets of linkage mechanisms 108 are hinged to the second round hole and the third round hole of the short fixed ear 1032 by a fixing pin. The short fixed ear 1042 is located near the second shaft sleeve 308, and the connecting pin in the short fixed ear 1042 is located below the fourth shaft segment 3015. The long fixed ear 1031 is located far from the second shaft sleeve 308.

[0097] In the above-mentioned long fixed lug and short fixed lug, "long" and "short" are a pair of relative concepts, which only indicate the length relationship between the two and do not have specific size limitations.

[0098] Combination Figure 5 and Figure 6As shown, the nail height adjustment assembly 5 includes a nail height adjustment bracket 501, a Hall bracket 502, a Hall sensor 503 electrically connected to the controller, and a magnet 504. The magnet 504 can be mounted on the nail cartridge bracket 102 or the linkage mechanism 108 to facilitate triggering the Hall sensor. In this embodiment, the magnet 504 is mounted on the linkage mechanism 108. The inner wall of the housing 4 has a first groove 401 extending along the closing direction of the pin cartridge assembly 1 at the location corresponding to the magnet 504. This groove houses the Hall sensor 503's Hall bracket 502. A guide post is located on the side of the Hall bracket 502 facing away from the Hall sensor 503. A slot is provided at one end of the pin height adjustment bracket 501, into which the guide post is inserted. The middle of the pin height adjustment bracket 501 is movably connected to the housing 4 via a rotating shaft. A lever is provided at the other end of the pin height adjustment bracket 501. When the lever is pushed to rotate the pin height adjustment bracket 501, the guide post slides within the slot. Simultaneously, the Hall bracket 502 and the Hall sensor 503 move up and down within the first groove 401 through the cooperation of the guide post and the slot. Furthermore, the housing 4 has an opening 402 for the lever to extend out of the housing 4, and scale markings are affixed to the outer surface of the housing 4 at the opening 402. After adjusting the height of the Hall bracket 502 and Hall sensor 503 using the lever, the power source transmits power to the closing drive mechanism 2 via the power transmission mechanism 3. The closing drive mechanism 2 drives the staple cartridge bracket 102 and the linkage mechanism 108 to descend. When the magnet 504 on the staple cartridge bracket 102 or the linkage mechanism 108 descends to the same height as the Hall sensor 503, the magnet 504 triggers the Hall sensor 503. The Hall sensor 503 sends the position information of the staple 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 can also be other position sensors, such as electromagnetic, photoelectric, differential transformer, eddy current, capacitive, or reed switch types. As long as the staple cartridge bracket 102 descends to the set position, the position sensor can send the position information of the staple cartridge bracket 102 to the controller, and the controller controls the power source to stop working, so that the staple cartridge bracket 102 and the anvil bracket 104 are maintained at a set distance, meeting the forming height requirements of different staples.

[0099] Furthermore, the distance from the axis of the rotating shaft in the middle of the nail height adjustment bracket 501 to the lever is greater than the distance from the axis of the rotating shaft to the slot. The displacement of the Hall sensor 503 is amplified by lever principle, so as to more precisely adjust the distance between the nail cartridge bracket 102 and the anvil bracket 104 (i.e., the closed height of the nail cartridge assembly 1).

[0100] In summary, the stapler in this embodiment can perform the following actions:

[0101] first step:

[0102] The operator moves a lever at one end of the nail height adjustment bracket 501 and moves the lever to the scale mark corresponding to the nail height. During this process, the other end of the nail height adjustment bracket 501 precisely adjusts the height of the Hall sensor 503 through the lever principle.

[0103] When the safety switch 305 moves the switching member 303 to the first position, the switching member 303 is connected to the first rotary output member 302 in a driving connection manner (that is, at this time, the first switching slider 3031 of the switching member 303 is inserted into the closed bushing 3022 of the first rotary output member 302 and corresponds circumferentially with the first stop 314 in the closed bushing 3022), and the switching member 303 is separated from the second rotary output member 304 (that is, at this time, the switching bushing 3033 of the switching member 303 is located near the second rotary output member 304 and does not form a connection).

[0104] When the motor is started, the rotation of the input shaft 301 is converted into the rotation of the switching element 303. The rotation of the switching element 303 drives the first rotation output element 302 to rotate, while the second rotation output element 304 remains stationary. The rotation of the first rotation output element 302 drives the closing screw 202 to rotate via the second bevel gear 204. The rotation of the closing screw 202 causes the closing nut 203 to move downward, which in turn causes the staple cartridge bracket 102 to move downward. When the magnet 504 located on the linkage mechanism 108 moves downward to the same height as the Hall sensor 503 (i.e., at this point, the distance between the staple cartridge bracket 102 and the anvil bracket 104 reaches the closing requirement), the Hall sensor 503 is triggered. The Hall sensor 503 sends an electrical signal to the controller, which then stops the motor. During the closing process, both sets of linkage mechanisms 108 close synchronously.

[0105] In this case, the first switching slider 3031 and the first stop 314 are circumferentially corresponding. This can be because when the switching member 303 is in the first position, the first switching slider 3031 and the first stop 314 are exactly in circumferential contact, or the first switching slider 3031 and the first stop 314 are circumferentially spaced by a certain distance when the switching member 303 is in the first position. However, when the switching member 303 starts to rotate a certain angle, it will contact the first stop 314 and thus push the closed bushing 3022 to rotate. This situation is also a drive connection.

[0106] Step Two:

[0107] The operator drives the safety switch 305 to move it to the distal side until the safety switch 305 moves the switching element 303 to the second position. At this time, the switching element 303 is disconnected from the first rotary output element 302 (that is, the first switching slider 3031 of the switching element 303 is located to the distal side of the first stop 314 and does not form a circumferential correspondence). The switching element 303 is connected to the second rotary output element 304 by a drive connection (that is, the switching bushing 3033 of the switching element 303 is sleeved on the periphery of the second switching slider 3041, and the second stop 318 and the second switching slider 3041 are circumferentially corresponding inside the switching bushing 3033).

[0108] The second stop 318 and the second switching slider 3041 are circumferentially aligned. This can be because when the switching member 303 is in the second position, the second stop 318 and the second switching slider 3041 are circumferentially in contact. Alternatively, when the switching member 303 is in the second position, the second stop 318 and the second switching slider 3041 are circumferentially spaced by a certain distance. However, when the switching member 303 starts to rotate a certain angle, it will contact the second switching slider 3041 and thus push the second switching slider 3041 to rotate. This situation is also a drive connection.

[0109] Step 3:

[0110] When the motor is started, the rotation of the input shaft 301 is converted into the rotation of the switching element 303. The switching element 303 drives the second rotation output element 304 to rotate, while the first rotation output element 302 remains stationary. The second rotation output element 304 drives the firing screw 106 to rotate, thereby causing the firing nut 107 to move axially to the distal side for firing.

[0111] Step 4:

[0112] When the firing needs to be released, the drive motor rotates in the opposite direction (opposite to the direction in step 3), the rotation input shaft 301 rotates in the opposite direction (opposite to the direction in step 3), the switching component 303 rotates in the opposite direction (opposite to the direction in step 3), the second rotation output component 304 rotates in the opposite direction (opposite to the direction in step 3), the firing screw 106 rotates in the opposite direction (opposite to the direction in step 3), and the firing nut 107 moves to the near side to return to its original position.

[0113] Step 5:

[0114] The motor is stopped, and the operator drives the safety switch 305 to move it closer until the safety switch 305 moves the switching element 303 to the first position. Then, the drive motor rotates in the opposite direction (opposite to the first step), the input shaft 301 rotates in the opposite direction (opposite to the first step), the switching element 303 rotates in the opposite direction (opposite to the first step), the first output component 302 rotates in the opposite direction (opposite to the first step), the second bevel gear 204 in the closing drive mechanism 2 rotates in the opposite direction (opposite to the first step), the closing screw 202 in the closing drive mechanism 2 rotates in the opposite direction (opposite to the first step), the closing nut 203 in the closing drive mechanism 2 moves upward, and the staple cartridge bracket 102 moves upward, returning to the open state. During the opening process, the two sets of linkage mechanisms 108 open synchronously.

[0115] This embodiment also provides a method for using the above-mentioned linear cutting stapler, which includes the following steps:

[0116] S1. Adjust the set distance between the nail magazine bracket 102 and the nail anvil bracket 104 using the nail height adjustment component 5;

[0117] S2. Connect the power transmission mechanism 3 and the closed drive mechanism 2 in a drive connection manner;

[0118] S3. When the power source is started, the power source transmits power to the closing drive mechanism 2 through the power transmission mechanism 3, and the staple cartridge assembly 1 begins to close.

[0119] S4. When the staple cartridge bracket 102 and the staple anvil bracket 104 approach the set distance, the staple height adjustment component 5 sends an electrical signal to the controller, and the controller controls the power source to stop working, and the staple cartridge component 1 stops closing.

[0120] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0121] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A linear cutting stapler, characterized in that: It includes a staple cartridge assembly (1), a closing drive mechanism (2), a power transmission mechanism (3), a housing (4), a controller, and a power source and a staple height adjustment assembly (5) electrically connected to the controller; The staple cartridge assembly (1) includes a staple cartridge bracket (102) and a staple anvil bracket (104). The proximal side of the staple cartridge bracket (102), the proximal side of the staple anvil bracket (104), the distal side of the power transmission mechanism (3) and the closing drive mechanism (2) are located in the housing (4). The closing drive mechanism (2) is connected to the staple cartridge bracket (102) or simultaneously connected to the staple cartridge bracket (102) and the staple anvil bracket (104), enabling the staple cartridge bracket (102) to approach or move away from the staple anvil bracket (104). The staple height adjustment assembly (5) is located on the housing (4). The power source is connected to the power transmission mechanism (3), and the power transmission mechanism (3) forms a selectable drive connection with the closed drive mechanism (2); When the power transmission mechanism (3) is driven to connect with the closing drive mechanism (2) and the power source transmits power to the closing drive mechanism (2) through the power transmission mechanism (3), the staple cartridge assembly (1) begins to close; When the staple cartridge bracket (102) and the staple anvil bracket (104) approach a set distance, the staple height adjustment component (5) sends an electrical signal to the controller, and the controller controls the power source to stop working; The nail height adjustment assembly (5) includes a position sensor and a nail height adjustment bracket (501). The housing (4) is provided with a first groove (401) extending along the closing direction of the nail cartridge assembly (1). The position sensor is located in the first groove (401) and connected to the nail height adjustment bracket (501). By moving the nail height adjustment bracket (501), the position sensor moves up and down along the first groove (401), thereby adjusting the set distance between the nail cartridge bracket (102) and the anvil bracket (104).

2. The linear cutting stapler as described in claim 1, characterized in that: The position sensor is an electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, or Hall sensor (503).

3. The linear cutting stapler as described in claim 1, characterized in that: The position sensor includes a Hall sensor (503) located in the first slide (401) and a magnet (504) located on the staple cartridge assembly (1). When the magnet (504) moves with the staple cartridge assembly (1) to the same height as the Hall sensor (503), it triggers the Hall sensor (503), and the Hall sensor (503) sends an electrical signal to the controller.

4. The linear cutting stapler as described in claim 3, characterized in that: The nail height adjustment assembly (5) also includes a Hall bracket (502) for mounting the Hall sensor (503); The Hall bracket (502) has a guide post on the side facing away from the Hall sensor (503). One end of the nail height adjustment bracket (501) has a slot, and the guide post is inserted into the slot. The middle part of the nail height adjustment bracket (501) is movably connected to the housing (4) through a rotating shaft. The other end of the nail height adjustment bracket (501) has a lever. When the lever is pushed to rotate the nail height adjustment bracket (501), the guide post slides in the slot. At the same time, the Hall bracket (502) and the Hall sensor (503) move up and down in the first slide groove (401) through the cooperation of the guide post and the slot. The housing (4) is provided with an opening (402) for the lever to extend out of the housing (4), and the outer surface of the housing (4) is affixed with scale markings at the opening (402); The distance from the axis of the rotating shaft in the middle of the nail height adjustment bracket (501) to the lever is greater than the distance from the axis of the rotating shaft in the middle of the nail height adjustment bracket (501) to the slot.

5. The linear cutting stapler as described in any one of claims 1-4, characterized in that: The anvil support (104) has a firing screw (106), and the power transmission mechanism (3) is selectively driven to the firing screw (106); When the power transmission mechanism (3) is driven to connect with the firing screw (106) and the power source transmits power to the firing screw (106) through the power transmission mechanism (3), the cartridge assembly (1) begins to fire; The power transmission mechanism (3) includes a rotation input shaft (301), a first rotation output component (302), a switching component (303), a second rotation output component (304), and a safety switch (305); The switching element (303) is mounted on the rotary input shaft (301) in a manner that allows it to move between a first position and a second position and is driven to be connected to the rotary input shaft (301). The safety switch (305) is connected to the switching element (303) in a manner that allows it to rotate relative to the switching element (303) and can drive the switching element (303) to move. The first rotary output element (302) is connected to the closing drive mechanism (2) in a manner that drives rotation. The second rotary output element (304) is connected to the firing screw (106) in a manner that drives rotation. When the switching element (303) is in the first position: The switching element (303) is connected to the first rotation output element (302) by a drive connection, and the switching element (303) is separated from the second rotation output element (304); When the switching element (303) is in the second position: The switching element (303) disconnects from the first rotation output element (302), and the switching element (303) is connected to the second rotation output element (304) in a driving connection manner.

6. The linear cutting stapler as described in claim 5, characterized in that: The switching component (303) includes a first switching slider (3031), a fixed slider (3032), and a switching bushing (3033); The switching sleeve (3033) is sleeved on the outside of the rotary input shaft (301). The rotary input shaft (301) is provided with a radially through second slide groove (3011). The first switching slider (3031) and the fixed slider (3032) can move bidirectionally along the axial direction of the rotary input shaft (301) and are supported in the second slide groove (3011). At least one end of the first switching slider (3031) extends out of the second slide groove (3011), and both ends of the fixed slider (3032) extend out of the second slide groove (3011). The near end of the switching bushing (3033) is provided with a mounting groove (3034), and the fixed slider (3032) is also located in the mounting groove (3034). The two ends of the fixed slider (3032) extending out of the second slide groove (3011) are connected to the peripheral wall of the switching bushing (3033) by pins, thereby supporting it in the mounting groove (3034) of the switching bushing (3033). The distal end of the first switching slider (3031) engages with the proximal end of the fixed slider (3032), allowing the first switching slider (3031) to move bidirectionally along the radial direction of the rotation input shaft (301) and be supported in the second slide groove (3011).

7. The linear cutting stapler as described in claim 6, characterized in that: The first rotation output component (302) includes a first bevel gear (3021) and a closed bushing (3022). The first bevel gear (3021) is fixed on the closed bushing (3022), and the closed bushing (3022) is sleeved on the periphery of the rotation input shaft (301). The closing drive mechanism (2) includes a closing screw (202), a closing nut (203), and a second bevel gear (204). The first bevel gear (3021) meshes 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 onto the closing screw (202), and the staple cartridge bracket (102) is sleeved onto the closing nut (203). The inner wall of the distal end of the closed bushing (3022) has at least two circumferentially spaced first stops (314), which are diametrically offset. The first stops (314) and the first switching slider (3031) are used to form a drive connection between the switching member (303) and the first rotation output member (302). When the switching element (303) is in the first position, the first switching slider (3031) and the first stop (314) are circumferentially corresponding; When the switching element (303) is in the second position, the first switching slider (3031) is located on the far side of the first stop (314).

8. The linear cutting stapler as described in claim 6, characterized in that: The firing screw (106) includes a transition section and a threaded section connected in sequence and coaxial from near to far. The near end of the transition section is rotatably sleeved with the far end of the rotary input shaft (301) in both directions. The transition section is provided with a radially penetrating third slide groove (1061). The second rotating output component (304) is a second switching slider (3041), which is supported in the third slide groove (1061) and is movably supported in the radial direction of the firing screw (106). At least one end of the second switching slider (3041) extends out of the third slide groove (1061). The inner wall of the distal end of the switching bushing (3033) has at least two circumferentially spaced second stops (318), which are diametrically offset. The second stops (318) and the second switching slider (3041) are used to form a drive connection between the switching member (303) and the second rotation output member (304). When the switching element (303) is in the first position, the second stop (318) is located near the second switching slider (3041); When the switching element (303) is in the second position, the second stop (318) and the second switching slider (3041) are circumferentially aligned.

9. A method of using a linear cutting stapler according to any one of claims 1-4, characterized in that: The method of use includes the following steps: S1. Adjust the set distance between the nail cartridge bracket (102) and the anvil bracket (104) by means of the nail height adjustment component (5); S2. Connect the power transmission mechanism (3) and the closing drive mechanism (2) in a drive connection manner; S3. When the power source is started and the power source transmits power to the closing drive mechanism (2) through the power transmission mechanism (3), the staple cartridge assembly (1) begins to close. S4. When the staple cartridge bracket (102) and the anvil bracket (104) approach the set distance, the staple height adjustment component (5) sends an electrical signal to the controller, the controller controls the power source to stop working, and the staple cartridge component (1) stops closing.

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