Electric stapler with a novel bending mechanism

Abstract

The present invention discloses an electric stapler with a novel bending mechanism, comprising: a sleeve module; a body module; a rotating module, which is arranged on the proximal periphery of the sleeve module, including a rotating shell and a bending mechanism installed on the rotating shell, a steering rod is provided between the outer sleeve and the inner sleeve, the proximal end of the steering rod is transmission-connected to the bending mechanism and the distal end is movably connected to the steering control mechanism; the bending mechanism includes a bending drive slider axially slidingly matched with the outer sleeve, a bending gear connecting rod rotatably arranged on the rotating shell, a bending drive assembly driving the bending gear connecting rod to rotate, and a driving slide shaft connecting the bending drive slider and the bending gear connecting rod, the driving slide shaft moves axially along the outer sleeve under the drive of the bending gear connecting rod, and the proximal end of the steering rod is fixedly connected to the bending drive slider. The electric stapler with a novel bending mechanism provided by the present invention is convenient and fast in bending operation, safe and reliable, and improves the safety of the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an electric stapler with a novel bending mechanism. Background Art

[0002] Electric laparoscopic cutting staplers have been widely praised in domestic and foreign markets in recent years due to their many advantages such as ease of use and good surgical treatment effects.

[0003] During clinical surgery, medical staff often need to hold multiple instruments. Therefore, the design of the laparoscopic stapler requires a compact structure and reasonable positioning of the function buttons to facilitate one-handed operation by the doctor.

[0004] Chinese patent CN 105816214B discloses a safety system and a stapler equipped with the same. The jaws of this stapler still utilize traditional manual operation for bending. Specifically, the doctor first hooks a rotating handwheel with their finger and pulls back to release the locking effect of the device's internal structure on the jaws. The doctor then uses another object to press against the jaws to bend them, and then releases the rotating handwheel to lock the jaws in the bent position. However, in actual clinical use, the doctor's finger often accidentally triggers the rotating handwheel, causing the jaw locking mechanism to release, and the jaws of the device suddenly transition from a bent state to a straight state. This is inconvenient for the doctor and can cause injury to the patient. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide an electric stapler with a novel bending mechanism, which is convenient and quick to operate, is less likely to cause accidental touch, and improves surgical safety.

[0006] In order to overcome the deficiencies of the prior art, the present invention provides the following technical solutions:

[0007] The electric stapler with a novel bending mechanism comprises:

[0008] The cannula module includes an outer cannula, a steering cannula hinged to the distal end of the outer cannula, an inner cannula inserted into the outer cannula, a steering control mechanism disposed at the distal end of the inner cannula and extending to the steering cannula, a staple cartridge mechanism fixedly connected to the steering control mechanism, a firing rod inserted into the inner cannula, and a cutting knife mechanism connected to the distal end of the firing rod and extending to the steering control mechanism;

[0009] The body module includes a bracket and a cutting drive mechanism mounted on the bracket, wherein the firing rod is in transmission connection with the cutting drive mechanism and moves axially along the inner sleeve under the drive of the cutting drive mechanism;

[0010] A rotating module is provided on the outer periphery of the proximal end of the cannula module and includes a rotating shell and a bending mechanism mounted on the rotating shell. A steering rod is provided between the outer cannula and the inner cannula. The proximal end of the steering rod is in transmission connection with the bending mechanism and the distal end is movably connected to the steering control mechanism.

[0011] The bending mechanism includes a bending drive slider that slidably cooperates with the outer sleeve axially, a bending gear connecting rod rotatably arranged on the rotating shell, a bending drive assembly that drives the bending gear connecting rod to rotate, and a driving slide shaft connecting the bending drive slider and the bending gear connecting rod. The driving slide shaft moves axially along the outer sleeve under the drive of the bending gear connecting rod, and the proximal end of the steering rod is fixedly connected to the bending drive slider.

[0012] In one embodiment, the bending drive assembly includes a bending drive motor and a bending drive gear provided at a power output end of the bending drive motor, and the bending drive gear is engaged with the bending gear connecting rod.

[0013] In one embodiment, the bending drive assembly includes a bending drive shaft extending radially along the outer sleeve, an elastic limiter mounted on the bending drive shaft, a rotating handle fixedly connected to the bending drive shaft, and an L-shaped rack respectively engaged with the bending drive shaft and the bending gear connecting rod, and the two ends of the elastic limiter respectively abut against the rotating outer shell and the bending drive shaft.

[0014] In one embodiment, the lower end surface of the rotating handle is provided with a plurality of grooves arranged along the circumferential direction, and the rotating housing is provided with protrusions that cooperate with the plurality of grooves.

[0015] In one embodiment, the bending gear connecting rod is in a fan-shaped structure and a tooth portion is provided in the arc length direction of the fan. The bending gear connecting rod is provided with a waist-shaped sliding groove for the driving sliding shaft to pass through;

[0016] The bending drive slider includes a slider body, a connecting portion arranged on the slider body to cooperate with the bending drive slider, and a traction portion arranged on the slider body to cooperate with the steering rod. An arc-shaped surface cooperating with the outer sleeve is formed on the slider body, and a sliding groove cooperating with the traction portion is provided on the outer wall of the outer sleeve.

[0017] In one embodiment, the steering control mechanism includes a steering fixing seat fixedly connected to the inner sleeve, a steering control seat rotatably engaged with the steering fixing seat, and a cutting knife steering seat arranged on the steering control seat, the cutting knife mechanism is inserted into the cutting knife steering seat, the steering control seat is provided with a steering drive pin, and the steering rod is provided with a steering waist-shaped hole engaged with the steering drive pin.

[0018] In one embodiment, the nail magazine mechanism includes a nail magazine seat fixedly connected to the steering control mechanism, an anvil hinged to the nail magazine seat, and a spring assembly disposed between the nail magazine seat and the anvil;

[0019] The spring element assembly includes a spring element body fixedly connected to the nail magazine seat, a first spring element portion abutting the nail seat, and a second spring element portion abutting the cutting knife mechanism. When there is no suturing assembly in the nail magazine seat, the second spring element portion limits the movement of the cutting knife mechanism.

[0020] In one embodiment, the cutting knife mechanism includes a knife seat, a cutting knife provided on the knife seat, a crimping portion provided on the knife seat away from the electric kiss jaws and cooperating with the second elastic sheet portion, a hanging ear provided on the side of the knife seat, and a lifting portion provided on the knife seat facing the electric kiss jaws, and the nail magazine seat is provided with a limit platform and a sunken groove cooperating with the hanging ear;

[0021] When there is no suturing assembly in the electric kiss jaws, the second spring piece part abuts against the crimping part so that the hanging ear is located in the sunken groove and abuts against the limit platform, and the cutting knife mechanism cannot move. When there is a suturing assembly in the electric kiss jaws, the sliding member of the suturing assembly abuts against the lifting part, and the knife seat overcomes the elastic force of the second spring piece part and moves upward, so that the hanging ear is separated from the limit platform, and the cutting knife assembly can move freely.

[0022] In one embodiment, the cutting drive mechanism includes a cutting motor, a gear assembly drivingly connected to the cutting motor, and a retraction assembly for disengaging the gear assembly from the cutting motor;

[0023] The gear assembly includes a pin shaft fixed on the bracket, a double gear rotatably arranged on the pin shaft, a plurality of planetary gears meshing with the pinion of the double gear, a planetary carrier supporting the plurality of planetary gears, and internal and external gears meshing with the plurality of planetary gears. The planetary carrier is sleeved on the pin shaft and is coaxially arranged with the double gear and the internal and external gears. The large gear of the double gear is transmission-connected to the cutting motor, and the internal and external gears are meshed with the rack connected to the firing rod.

[0024] In one embodiment, the retraction assembly includes a retraction square shaft sleeved on the pin shaft and fixedly connected to the planetary frame, a retraction handle is hinged on the retraction square shaft, and a limit block assembly is provided on the bracket to limit the rotation of the retraction handle.

[0025] In one embodiment, a movable handle assembly for closing the jaws is hingedly connected to the bracket, and a closing assembly cooperating with the movable handle assembly is provided on the outer sleeve;

[0026] The closing assembly includes a sleeve rear seat fixed on the outer wall of the outer sleeve and a reset component arranged between the sleeve rear seat and the bracket. The sleeve rear seat is provided with a hinge part hinged to the movable handle assembly.

[0027] In one embodiment, the movable handle assembly includes a handle portion hinged to the bracket, a closing link hinged to the side of the handle portion close to the hinge portion, and a locking portion arranged on the side of the handle portion away from the hinge portion. A locking button that cooperates with the locking portion is rotatably provided on the bracket. When the handle portion is rotated to close the electric kiss clamp, the locking portion abuts against the locking button and is locked. After the locking button is rotated, the locking portion is disengaged from the locking button, and the handle portion is reset under the action of the reset component.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] 1. Through the cooperation of the bending mechanism and the steering rod, when the bending drive assembly drives the bending drive slider to move axially along the outer sleeve, it can drive the steering rod to move axially between the outer sleeve and the inner sleeve, thereby driving the nail magazine mechanism to rotate through the steering control mechanism to achieve left and right steering of the jaws;

[0030] 2. When the bending drive assembly adopts electric drive, it is convenient for doctors to operate with one hand during surgery, thereby improving surgical efficiency;

[0031] 3. When the turning drive assembly is manually operated, an elastic limiting component is provided between the rotating handle and the rotating drive shaft, so that the rotating handle is pressed against the rotating shell, which is not easy to be accidentally touched. The rotating handle and the rotating shell are provided with matching grooves and protrusions to further avoid accidental touches. When the turning operation is performed, a clicking sound is heard between the rotating handle and the rotating shell after the engagement, indicating the turning gear position;

[0032] 4. The spring assembly provided between the nail magazine seat and the nail anvil seat can form an electric kiss jaw between the nail magazine seat and the nail anvil seat. The spring assembly can also cooperate with the cutting knife assembly. When there is no separating assembly in the electric kiss jaw, the movement of the cutting knife assembly can be restricted to play a safety role.

[0033] 5. The cutting drive mechanism is equipped with a retraction assembly to facilitate the separation of the gear assembly from the cutting motor. When the motor fails, the cutting knife mechanism can be reset by operating the retraction assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0036] Figure 2 Schematic diagram of the structure of the body module in Example 1 of the present invention;

[0037] Figure 3 This is one of the structural diagrams of the gear assembly in Example 1 of the present invention;

[0038] Figure 4 for Figure 3 AA cross-sectional diagram;

[0039] Figure 5 This is a second structural diagram of the gear assembly in Example 1 of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the rollback component in Example 1 of the present invention;

[0041] Figure 7 This is a schematic structural diagram of the movable handle assembly in Example 1 of the present invention;

[0042] Figure 8 Schematic diagram of the structure of the rotating module in Example 1 of the present invention;

[0043] Figure 9 for Figure 8 A partial enlarged view of point I in the middle;

[0044] Figure 10 for Figure 8 Schematic diagram of the middle BB section;

[0045] Figure 11 Schematic diagram of the structure of the bending gear connecting rod in Example 1 of the present invention;

[0046] Figure 12 Schematic diagram of the structure of the bending drive slider in Example 1 of the present invention;

[0047] Figure 13 Schematic diagram of the structure of the sleeve module in Example 1 of the present invention;

[0048] Figure 14 Figure 13 Schematic diagram of the middle BB section;

[0049] Figure 15This is one of the structural diagrams of the steering control mechanism in Example 1 of the present invention;

[0050] Figure 16 This is a second structural diagram of the steering control mechanism in Example 1 of the present invention;

[0051] Figure 17 Schematic diagram of the structure of the steering rod in Example 1 of the present invention;

[0052] Figure 18 This is a schematic diagram of the structure of the steering rod and the steering drive slider in embodiment 1 of the present invention;

[0053] Figure 19 This is a schematic structural diagram of the coordination between the steering rod and the steering control mechanism in Example 1 of the present invention;

[0054] Figure 20 Schematic diagram of the structure of the spring assembly in Example 1 of the present invention;

[0055] Figure 21 Schematic diagram of the structure of the staple cartridge mechanism in Example 1 of the present invention;

[0056] Figure 22 This is a structural diagram of a nail magazine seat in Example 1 of the present invention;

[0057] Figure 23 for Figure 22 A partial enlarged view of point H in the middle;

[0058] Figure 24 Schematic diagram of the structure of the cutting blade mechanism in Example 1 of the present invention;

[0059] Figure 25 This is a schematic diagram of the cutting safety state in Example 1 of the present invention;

[0060] Figure 26 This is a schematic structural diagram of the contact cutting insurance state in Example 1 of the present invention;

[0061] Figure 27 This is a schematic structural diagram of Example 2 of the present invention;

[0062] Figure 28 for Figure 27 Schematic diagram of the middle DD section;

[0063] Figure 29 This is a schematic structural diagram of a rotary handle in Example 2 of the present invention;

[0064] Figure 30 for Figure 29 A partial enlarged view of the middle J;

[0065] Figure 31 Schematic diagram of the structure of the rotating housing in Example 2 of the present invention;

[0066] Figure 32 for Figure 31 A partial enlarged view of the K point in the middle;

[0067] Figure 33 Schematic diagram of the structure of the L-shaped rack in Example 2 of the present invention;

[0068] in:

[0069] 1. Body module; 11. Cutting motor; 111. Cutting drive gear; 112. Rack; 113. Gear assembly; 1131. Retractable square shaft; 1132. Planet carrier; 1133. Planetary gear; 1134. Inner and outer gears; 11341. Outer gears; 11342. Inner gears; 1135. Double gears; 11351. Large gear; 11352. Small gear; 1136. Pin; 1137. Retract handle; 121. Lock button; 122. Movable handle assembly; 1221. Handle; 1222. Closing link; 1223. Locking unit; 13. Circuit board; 14. Bracket; 141. Limit block;

[0070] 2. Rotation module; 21. Rotation housing; 211. Drive chute; 212. Raised portion; 22. Bending drive motor; 221. Rotation handle; 2211. Groove; 222. Bending drive shaft; 223. Elastic stopper; 23. Bending drive gear; 24. Bending gear connecting rod; 241. Waist-shaped chute; 242. Shaft hole; 25. Drive shaft; 26. Bending drive slider; 261. Connecting portion; 262. Slider body; 263. Traction portion; 27. Rotation shaft; 28. Elastic stopper; 29. L-shaped rack; 291. First meshing tooth; 292. Second meshing tooth;

[0071] 3. Casing module; 30. Firing rod; 31. Inner casing; 32. Casing back seat; 321. Hinge; 33. Reset component; 341. Outer casing; 342. Steering casing; 351. Anvil; 352. Nail magazine seat; 3521. Limiting boss; 3522. Sunken groove; 353. Articulated shaft; 361. Steering rod; 3611. Square hole; 3612. Steering waist hole; 362. Steering Control mechanism; 3621, steering fixing seat; 36211, steering pin shaft; 3622, cutting knife steering seat; 3623, steering control seat; 36231, steering pin hole; 36232, steering drive pin; 36233, mounting hole; 37, spring clip assembly; 371, first spring clip; 372, second spring clip; 38, cutting knife mechanism; 381, hanging ear; 382, crimping portion; 383, lifting portion;

[0072] 4. Suture components. DETAILED DESCRIPTION

[0073] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present invention and are not intended to limit the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer. The implementation conditions not specified are generally those in routine experiments.

[0074] See also Figure 1 , which is a structural diagram of Example 1 of the present invention, provides an electric stapler with a new bending mechanism, including a body module 1, a rotation module 2 and a sleeve module 3 arranged in sequence.

[0075] like Figure 13 and Figure 14 As shown, the cannula module 3 includes an outer cannula 341, an inner cannula 31 hinged at the distal end of the outer cannula 341 to a steering cannula 342, a steering control mechanism 362 disposed at the distal end of the inner cannula 31 and extending to the steering cannula 342, a staple cartridge mechanism fixedly connected to the steering control mechanism 362, a firing rod 30 disposed in the inner cannula 31, and a cutting knife mechanism 38 connected to the distal end of the firing rod 30 and extending to the steering control mechanism 362. The distal end herein refers to the end closer to the patient during surgery, and the proximal end refers to the end farther away from the patient during surgery.

[0076] like Figures 8 to 10 As shown, the rotating module 2 is disposed on the proximal periphery of the cannula module 3 and includes a rotating housing 21 and a bending mechanism mounted on the rotating housing 21. A steering rod 361 is provided between the outer cannula 341 and the inner cannula 31. The proximal end of the steering rod 361 is drivingly connected to the bending mechanism and the distal end is movably connected to the steering control mechanism 362. The rotating housing 21 can be configured as two interconnected parts: a left rotating housing and a right rotating housing.

[0077] The bending mechanism includes a bending drive slider 26 that axially slides with the outer sleeve 341, a bending gear connecting rod 24 rotatably arranged on the rotating shell 21, a bending drive assembly that drives the bending gear connecting rod 24 to rotate, and a driving slide shaft 25 connecting the bending drive slider 26 and the bending gear connecting rod 24. The driving slide shaft 25 moves axially along the outer sleeve 341 under the drive of the bending gear connecting rod 24. The proximal end of the steering rod 361 is fixedly connected to the bending drive slider 26. The bending gear connecting rod 24 is driven to rotate by the bending drive assembly to drive the bending drive slider 26 to move axially along the outer sleeve 341, thereby driving the steering rod 361 to move axially along the outer sleeve 341, and then the steering rod 361 drives the steering control mechanism 362 to complete the steering.

[0078] like Figure 11As shown, the bending gear connecting rod 24 has a fan-shaped structure with teeth arranged along the arc length of the fan. A waist-shaped slot 241 is provided on the bending gear connecting rod 24 for the drive shaft 25 to pass through. When the bending gear connecting rod 24 rotates, the drive shaft 25 can move within the waist-shaped slot 241, achieving axial movement along the outer sleeve 341. The bending gear connecting rod 24 is rotatably mounted on a rotating shaft 27 on the rotating housing 21. Accordingly, the bending gear connecting rod 24 is provided with an axial hole 242 for the rotating shaft 27 to pass through.

[0079] In order to improve the stability of the structure, a driving groove 211 that cooperates with the first end of the driving slide shaft 25 is provided on the rotating shell 21, and a limiting boss is provided in the middle of the driving slide shaft 25. An elastic limiting component 28 is sleeved on the driving slide shaft 25, and the elastic limiting component 28 abuts between the limiting boss and the driving groove 211. Preferably, the elastic limiting component 28 adopts a spring, and the second end of the driving slide shaft 25 is passed through the bending driving slider 26 and the bending gear connecting rod 24. Through the action of the elastic limiting component 28, the driving slide shaft 25 can always be maintained on the bending driving slider 26 and the bending gear connecting rod 24, thereby improving the stability of the structure.

[0080] like Figure 12 As shown, the bending drive slider 26 includes a slider body 262, a connecting portion 261 arranged on the slider body 262 and cooperating with the bending gear connecting rod 24, and a traction portion 263 arranged on the slider body 262 and cooperating with the steering rod 361. An arcuate surface cooperating with the outer sleeve 341 is formed on the slider body 262, and a sliding groove cooperating with the traction portion 263 is provided on the outer wall of the outer sleeve 341. The lower end of the traction portion 263 is a square structure. In order to cooperate with the traction portion 263, a square hole 3611 is provided on the steering rod 361 to achieve fixed cooperation with the traction portion 263.

[0081] In this example, the bending drive assembly includes a bending drive motor 22 and a bending drive gear 23 provided at a power output end of the bending drive motor 22 . The bending drive gear 23 is meshed with a bending gear connecting rod 24 .

[0082] When the bending motor 22 fails and cannot rotate, in order to facilitate the reset of the jaws after bending, an operating window hole connected to the drive slide shaft 25 is provided on the rotating shell 21. The drive slide shaft 25 is manually pulled to overcome the limiting effect of the elastic limiting component 28 and move into the drive slide groove 211 until the connection between the bending gear connecting rod 24 and the bending drive slider 26 is cut off. At this time, since the bending motor 22 is not locked, the electric kiss jaws are in an active state, and the coaxiality of the electric kiss jaws and the outer sleeve 341 can be adjusted to achieve the reset of the electric kiss jaws.

[0083] like Figure 15 and Figure 16As shown, the steering control mechanism 362 includes a steering fixed seat 3621 fixedly connected to the inner sleeve 31, a steering control seat 3623 rotatably matched with the steering fixed seat 3621, and a cutting knife steering seat 3622 arranged on the steering control seat 3623. The cutting knife mechanism 38 is passed through the cutting knife steering seat 3622, and a steering pin shaft 36211 is provided on the steering fixed seat 3621. At the same time, a steering pin hole 36231 cooperating with the steering pin shaft 36211 is provided on the steering control seat 3623. Through the cooperation of the steering pin shaft 36211 and the steering pin hole 36231, the rotational cooperation of the steering control seat 3623 and the steering fixed seat 3621 is realized.

[0084] A steering drive pin 36232 is provided on the rotation control seat 3623, and a steering waist-shaped hole 3612 is provided on the steering rod 361 to cooperate with the steering drive pin 36232. When the bending mechanism drives the steering rod 361 to move axially along the outer sleeve 341, the steering drive pin 36232 can move in the steering waist-shaped hole 3612. The steering rod 361 then causes the steering control seat 3623 to rotate around the steering fixed seat 3621, achieving left and right steering.

[0085] like Figure 21 As shown, the nail magazine mechanism includes a nail magazine seat 352 fixedly connected to the steering control seat 3623, a nail anvil seat 351 hinged to the nail magazine seat 352, and a spring assembly 37 arranged between the nail magazine seat 352 and the nail anvil seat 351, wherein the nail magazine seat 352 is fixed to the mounting hole 36233 on the steering control seat 3623 through fasteners.

[0086] like Figure 20 As shown, the spring element assembly 37 includes a spring element body fixedly connected to the staple cartridge seat, a first spring element portion abutting the staple cartridge seat 351, and a second spring element portion abutting the cutting blade mechanism 38. When there is no suturing assembly 4 in the staple cartridge seat 351, the second spring element portion restricts the movement of the cutting blade mechanism 38. Specifically, the first spring element portion includes two first spring elements 371 arranged in parallel, and the second spring element portion includes a second spring element 372 disposed between the two first spring elements 371. The angle between the first spring element 371 and the spring element body is greater than the angle between the second spring element 372 and the spring element body.

[0087] like Figure 24 As shown, the cutting knife mechanism 38 includes a knife seat, a cutting knife arranged on the knife seat, a crimping portion 382 arranged on the knife seat away from the electric kiss jaws and cooperating with the second elastic piece portion, a hanging ear 381 arranged on the side of the knife seat, and a lifting portion 383 arranged on the knife seat facing the electric kiss jaws, as shown in FIG. Figure 22 and Figure 23 As shown, the nail magazine seat 352 is provided with a limit platform 3521 and a sunken groove 3522 that cooperate with the hanging ear 381. Figure 25As shown, when there is no suture assembly 4 in the electric kiss jaws, the second spring portion abuts against the crimping portion 382 so that the hanging ear 381 is located in the sunken groove 3522 on the nail magazine seat 352 and abuts against the limit platform 3521, and the cutting knife mechanism 38 cannot move. Figure 26 As shown, when the suture assembly 4 is installed in the electric kiss jaws, the slider of the suture assembly 4 abuts the lifting portion 383, and the knife holder overcomes the elastic force of the second spring portion and moves upward, allowing the ear 381 to disengage from the stop 3521, allowing the cutting knife mechanism 38 to move freely. Thus, the spring assembly 37 not only forms the electric kiss jaws between the staple cartridge seat 352 and the staple anvil seat 351, but also acts as a cutting safety device. The cutting knife assembly can only be operated when the suture assembly is installed.

[0088] like Figure 2 As shown, the body module 1 includes a bracket 14, a cutting drive mechanism installed on the bracket 14, and a circuit board 13 connected to the cutting drive mechanism. The firing rod 30 is transmission-connected to the cutting drive mechanism and moves axially along the inner sleeve 31 under the drive of the cutting drive mechanism, thereby completing tissue cutting.

[0089] Specifically, the cutting drive mechanism includes a cutting motor 11, a gear assembly connected to the cutting motor 11, and a retraction assembly that separates the gear assembly from the cutting motor 11. Figures 3 to 5 As shown, the gear assembly includes a pin 1136 fixed to the bracket 14, a duplex gear 1135 rotatably arranged on the pin 1136, a plurality of planetary gears 1133 meshing with the pinion 11352 of the duplex gear 1135, a planet carrier 1132 supporting the plurality of planetary gears 1133, and an inner and outer gear 1134 meshing with the outer surface of the plurality of planetary gears 1133, the inner teeth 11341 of the inner and outer gear 1134 meshing with the plurality of planetary gears 1133, the planet carrier 1132 being sleeved on the pin 1136 and being engaged with the duplex gear 1135. 135. The inner and outer gears 1134 are coaxially arranged. The large gear 11351 of the double gear 1135 is in transmission connection with the cutting drive gear 111 at the power output end of the cutting motor 11. The outer teeth 11341 of the inner and outer gear 1134 are engaged with the rack 112 connected to the firing rod 30. The cutting motor 11 drives the large gear 11351 of the double gear 1135 to rotate. The small gear 11352 of the double gear 1135 drives the multiple planetary gears 1133 to rotate. The multiple planetary gears 1133 further drive the inner and outer gears 1134 to rotate, thereby driving the rack 112 to move, thereby driving the cutting knife mechanism 38 to move.

[0090] like Figure 6As shown, the retraction assembly includes a retraction square shaft 1131 that is sleeved on the pin shaft 1136 and fixedly connected to the planetary frame 1132, and a retraction handle 1137 is hinged on the retraction square shaft 1131. A limit block assembly for limiting the rotation of the retraction handle 1137 is provided on the bracket 14. The retraction handle 1137 is T-shaped, and the limit block assembly includes two limit blocks 141 arranged on both sides of the retraction handle 1137. Placing the retraction handle 1137 between the two limit blocks 141 can limit the rotation of the retraction handle 1137, so that the cutting drive mechanism 38 maintains a stable working state.

[0091] In order to facilitate the opening and closing of the electric kiss jaws, a movable handle assembly 122 is hinged on the bracket 14, and a closing assembly that cooperates with the movable handle assembly 122 is provided on the outer sleeve 341. Figure 13 As shown, the closing assembly includes a sleeve back seat 32 fixed to the outer sleeve 341 and a reset component 33 disposed between the sleeve back seat 32 and the bracket 14. The sleeve back seat 32 is provided with a hinge portion 321 hinged to the movable handle assembly 122. Preferably, the reset component 33 can be a spring. The movable handle assembly 122 pushes the sleeve back seat 321 to move the outer sleeve 341 toward the distal end. The outer sleeve 341 further pushes the steering sleeve 342 toward the distal end. Since the staple cartridge mechanism is connected to the inner sleeve 31, while the inner sleeve 31 remains stationary, the steering sleeve 342 drives the staple holder 351 to overcome the elastic force of the shrapnel assembly 37 and close, thereby closing the jaws. When the movable handle assembly 122 is reset, the electric kiss jaws can be opened.

[0092] like Figure 7 As shown, the movable handle assembly 122 includes a handle portion 1221 hinged to the bracket 14, a closing link 1222 hinged to the side of the handle portion 1221 close to the hinge portion 321, and a locking portion 1223 arranged on the side of the handle portion 1221 away from the hinge portion 321. A locking button 121 that cooperates with the locking portion 1223 is rotatably provided on the bracket 14. When the handle portion 1221 is rotated, the closing link 1222 can pull the sleeve rear seat 32 to close the electric kiss jaws. At this time, the locking portion 1223 abuts against the locking button 121 and is locked. After the locking button 121 is rotated, the locking portion 1223 disengages from the locking button 121, and the handle portion 1221 is reset under the drive of the reset component 33.

[0093] like Figure 27 and Figure 28FIG. 2 is a schematic diagram of the structure of Example 2 of the present invention. The other aspects are the same as Example 1, except that the bending is manually operated. Specifically, the bending drive assembly includes a bending drive shaft 222 extending radially along the outer sleeve 341, an elastic stopper 223 sleeved on the bending drive shaft 222, a rotating handle 221 fixedly connected to the bending drive shaft 222, and an L-shaped rack 29 meshing with the bending drive shaft 222 and the bending gear connecting rod 24. The elastic stopper 223 can be a spring, with its ends respectively abutting against the rotating housing 21 and the bending drive shaft 222 to retain the bending handle 221 on the rotating housing 21. Rotating the rotating handle 221 drives the bending drive shaft 222 to rotate, thereby driving the L-shaped rack 29 to move axially along the outer sleeve 341, smoothly driving the bending gear connecting rod 24 to rotate, and further driving the bending drive slider 26 to move the steering rod 361, thereby completing the bending of the jaws.

[0094] like Figure 33 As shown, the upper end surface of the L-shaped rack 29 is provided with a first meshing tooth 291 meshing with the bending drive shaft 222, and the side end surface is provided with a second meshing tooth 292 meshing with the bending gear connecting rod 24.

[0095] In order to further optimize the implementation effect of the present invention, Figure 29 and Figure 30 As shown, a plurality of grooves 2211 are arranged along the circumferential direction on the lower end surface of the rotating handle 221. Figure 31 and Figure 32 As shown, a protrusion 212 matching a plurality of grooves 2211 is provided on the rotating shell 21. When the rotating handle 221 is rotated, a clicking sound is produced after the rotating handle 221 and the rotating shell 21 rotate and cooperate, forming a gear sense and avoiding accidental touch.

[0096] The working principle of the present invention is:

[0097] During the jaw closing process, the movable handle assembly 122 is rotated, and the closing link 1222 drives the outer sleeve 341 and the steering sleeve 342 to move distally via the sleeve rear seat 32. Since the stapler mechanism is connected to the inner sleeve 31 and remains stationary, the steering sleeve 342 drives the anvil 351 to overcome the elastic force of the spring assembly 37 and close. At this time, the stapler is extended to the tissue location where cutting is required or suturing is completed. The locking button 121 is rotated, and the locking portion 1223 is disengaged from the locking button 121. The movable handle assembly 122 is reset by the reset component 33, and the jaws are opened.

[0098] Cutting process: The cutting motor 11 drives the large gear 11351 of the double gear 1135 to rotate, the small gear 11352 of the double gear 1135 drives multiple planetary gears 1133 to rotate, and the multiple planetary gears 1133 drive the inner and outer gears 1134 to rotate, and the inner and outer gears 1134 drive the rack 112 connected to the firing rod 30 to move, thereby driving the cutting knife mechanism 38 to move through the firing rod 30 to complete the cutting process. During the cutting process, only when the suture assembly 4 is installed in the jaws and the slider of the suture assembly 4 lifts the knife seat to make the ear 381 disengage from the limiting boss 3522 on the nail magazine seat 352, the cutting knife mechanism 38 will move, thereby achieving the effect of cutting insurance.

[0099] The jaw bending process: the bending gear connecting rod 24 is driven to rotate by the bending drive motor 22 or the rotating handle 221 to drive the bending drive slider 26 to move, thereby driving the steering rod 361 to move, and then driving the steering control seat 3623 to rotate, and finally realizing the rotation of the nail magazine mechanism on the steering control seat 3623 to realize the bending operation of the jaw.

[0100] In summary, the electric stapler has a new bending mechanism, which is easy to operate, can avoid accidental touch, and improve the safety performance of the operation.

[0101] The above examples are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. An electric stapler with a novel bending mechanism, characterized in that: include: The cannula module includes an outer cannula, a steering cannula hinged to the distal end of the outer cannula, an inner cannula inserted into the outer cannula, a steering control mechanism disposed at the distal end of the inner cannula and extending to the steering cannula, a staple cartridge mechanism fixedly connected to the steering control mechanism, a firing rod inserted into the inner cannula, and a cutting knife mechanism connected to the distal end of the firing rod and extending to the steering control mechanism; The body module includes a bracket and a cutting drive mechanism mounted on the bracket, wherein the firing rod is in transmission connection with the cutting drive mechanism and moves axially along the inner sleeve under the drive of the cutting drive mechanism; A rotating module is provided on the outer periphery of the proximal end of the cannula module and includes a rotating shell and a bending mechanism mounted on the rotating shell. A steering rod is provided between the outer cannula and the inner cannula. The proximal end of the steering rod is in transmission connection with the bending mechanism and the distal end is movably connected to the steering control mechanism. The bending mechanism includes a bending drive slider slidably matched with the outer sleeve axially, a bending gear connecting rod rotatably arranged on the rotating shell, a bending drive assembly that drives the bending gear connecting rod to rotate, and a driving sliding shaft connecting the bending drive slider and the bending gear connecting rod. The bending drive slider moves axially along the outer sleeve under the drive of the bending gear connecting rod, and the proximal end of the steering rod is fixedly connected to the bending drive slider; The bending gear connecting rod is in a fan-shaped structure and a tooth portion is provided in the arc length direction of the fan. The bending gear connecting rod is provided with a waist-shaped sliding groove for the driving sliding shaft to pass through.

2. The electric stapler with a novel bending mechanism according to claim 1, characterized in that: The bending drive assembly includes a bending drive motor and a bending drive gear arranged at a power output end of the bending drive motor, and the bending drive gear is meshed with the bending gear connecting rod.

3. The electric stapler with a novel bending mechanism according to claim 1, characterized in that: The bending drive assembly includes a bending drive shaft extending radially along the outer sleeve, an elastic limiter mounted on the bending drive shaft, a rotating handle fixedly connected to the bending drive shaft, and an L-shaped rack respectively engaged with the bending drive shaft and the bending gear connecting rod, and the two ends of the elastic limiter respectively abut against the rotating outer shell and the bending drive shaft.

4. The electric stapler with a novel bending mechanism according to claim 3, characterized in that: The lower end surface of the rotating handle is provided with a plurality of grooves arranged along the circumferential direction, and the rotating shell is provided with protrusions that match the plurality of grooves.

5. The electric stapler with a novel bending mechanism according to claim 2 or 3, characterized in that: The bending drive slider includes a slider body, a connecting portion arranged on the slider body to cooperate with the bending drive slider, and a traction portion arranged on the slider body to cooperate with the steering rod. An arc-shaped surface cooperating with the outer sleeve is formed on the slider body, and a sliding groove cooperating with the traction portion is provided on the outer wall of the outer sleeve.

6. The electric stapler with a novel bending mechanism according to claim 1, characterized in that: The steering control mechanism includes a steering fixing seat fixedly connected to the inner sleeve, a steering control seat rotatably matched with the steering fixing seat, and a cutting knife steering seat arranged on the steering control seat. The cutting knife mechanism is inserted into the cutting knife steering seat, a steering drive pin is provided on the steering control seat, and a steering waist-shaped hole is provided on the steering rod to cooperate with the steering drive pin.

7. The electric stapler with a novel bending mechanism according to claim 1, characterized in that: The nail magazine mechanism includes a nail magazine seat fixedly connected to the steering control mechanism, an anvil hinged to the nail magazine seat, and a spring assembly arranged between the nail magazine seat and the anvil; The spring element assembly includes a spring element body fixedly connected to the nail magazine seat, a first spring element portion abutting the nail seat, and a second spring element portion abutting the cutting knife mechanism. When there is no suturing assembly in the nail magazine seat, the second spring element portion limits the movement of the cutting knife mechanism.

8. The electric stapler with a novel bending mechanism according to claim 7, characterized in that: The cutting knife mechanism includes a knife seat, a cutting knife arranged on the knife seat, a crimping portion arranged on the knife seat away from the electric kiss jaws and cooperating with the second elastic sheet portion, a hanging ear arranged on the side of the knife seat, and a lifting portion arranged on the knife seat facing the electric kiss jaws, and the nail magazine seat is provided with a limit platform and a sunken groove cooperating with the hanging ear; When there is no suturing assembly in the electric kiss jaws, the second spring piece part abuts against the crimping part so that the hanging ear is located in the sunken groove and abuts against the limit platform, and the cutting knife mechanism cannot move. When there is a suturing assembly in the electric kiss jaws, the sliding member of the suturing assembly abuts against the lifting part, and the knife seat overcomes the elastic force of the second spring piece part and moves upward, so that the hanging ear is separated from the limit platform, and the cutting knife assembly can move freely.

9. The electric stapler with a novel bending mechanism according to claim 1, characterized in that: The cutting drive mechanism includes a cutting motor, a gear assembly connected to the cutting motor, and a retraction assembly for disengaging the gear assembly from the cutting motor. The gear assembly includes a pin shaft fixed on the bracket, a double gear rotatably arranged on the pin shaft, a plurality of planetary gears meshing with the pinion of the double gear, a planetary carrier supporting the plurality of planetary gears, and internal and external gears meshing with the plurality of planetary gears. The planetary carrier is sleeved on the pin shaft and is coaxially arranged with the double gear and the internal and external gears. The large gear of the double gear is transmission-connected to the cutting motor, and the internal and external gears are meshed with the rack connected to the firing rod.

10. The electric stapler with a novel bending mechanism according to claim 9, characterized in that: The retraction assembly includes a retraction square shaft sleeved on the pin shaft and fixedly connected to the planetary frame, a retraction handle is hinged on the retraction square shaft, and a limit block assembly for limiting the rotation of the retraction handle is provided on the bracket.

11. The electric stapler with a novel bending mechanism according to claim 1, characterized in that: A movable handle assembly for closing the jaws is hingedly connected to the bracket, and a closing assembly cooperating with the movable handle assembly is provided on the outer sleeve; The closing assembly includes a sleeve rear seat fixed on the outer wall of the outer sleeve and a reset component arranged between the sleeve rear seat and the bracket. The sleeve rear seat is provided with a hinge part hinged to the movable handle assembly.

12. The electric stapler with a novel bending mechanism according to claim 11, characterized in that: The movable handle assembly includes a handle portion hinged to the bracket, a closing link hinged to the side of the handle portion close to the hinge portion, and a locking portion arranged on the side of the handle portion away from the hinge portion. A locking button that cooperates with the locking portion is rotatably provided on the bracket. When the handle portion is rotated to close the electric kiss clamp, the locking portion abuts against the locking button and is locked. After the locking button is rotated, the locking portion is disengaged from the locking button, and the handle portion is reset under the action of the reset component.

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