Multi-functional anastomat and control method

Abstract

The present application relates to the technical field of anastomat, and particularly relates to a multifunctional anastomat and a control method. The multifunctional anastomat comprises a motor, a rack and a firing wheel, and is matched with at least three switching switches and a current limiting protection unit in a control circuit to realize multi-stage firing and fault protection. The third switching switch triggers current limiting starting, the second switching switch disconnects current limiting and keeps full power firing, and the first switching switch cuts off current to complete rapid shutdown. A manual backoff anti-reuse structure manually backoffs the rack and disconnects the engagement between the rack and the firing wheel when stuck or fault occurs, so that the un-repaired equipment is prevented from being started again. The present application takes into account current limiting protection, multi-step switching and safety anti-reuse, and improves the operation safety and operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of anastomosis device technology, and in particular to a multifunctional anastomosis device and its control method. Background Technology

[0002] With the popularization of minimally invasive surgical techniques, electric staplers are widely used in surgery. These devices typically consist of a motor, rack, and staple cartridge assembly. The motor drives the rack in reciprocating motion to perform tissue staplening and cutting. To adapt to complex surgical environments, staplers require multi-step precise control and fault protection mechanisms, including but not limited to: 1. Current limiting protection: Preventing the motor from overheating or being damaged when overloaded or encountering high resistance. 2. Multi-switch linkage control: Controlling the motor in stages at different stroke points, such as current-limited start, full-power firing, and rapid stop. 3. Manual retraction and anti-reuse function: In case of motor or rack failure or emergency needs, manually retracting the rack and disengaging it from the firing wheel prevents the unrepaired device from being restarted.

[0003] For example, Chinese patent CN111202553B discloses a manual retraction device for an electric stapler, which can achieve manual retraction when the motor fails or the rack jams. However, this solution is still insufficient in combining the three elements of "current limiting protection, staged firing control, and manual retraction to prevent reuse":

[0004] 1. Lack of segmented switching current limiting control: It only monitors the motor current and cannot automatically switch the current limiting unit at different stages, making it difficult to take into account both start-up protection and full-power firing.

[0005] 2. Insufficient linkage between rapid stop and rack disengagement: Although manual retraction is available, the mechanism for immediately cutting off the motor and simultaneously disengaging the rack in case of a malfunction is still inadequate.

[0006] 3. Inadequate anti-reuse measures: After a jam or malfunction, the rolled-back equipment may still restart unexpectedly, posing a safety hazard.

[0007] Therefore, how to integrate multi-functional mechanisms such as "current limiting protection, multiple switching control, and manual backoff anti-reuse" into the same device has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] The purpose of this invention is to provide a multifunctional stapler and control method to address the shortcomings of existing technologies. It aims to ensure efficient firing and ease of use while significantly improving the safety performance of the stapler. Under normal circumstances, it can achieve both current-limited start-up and full-power firing, and in case of failure, it can avoid secondary injury through manual retraction and anti-reuse mechanisms.

[0009] This invention achieves the above-mentioned objective through the following technical solution: a multifunctional anastomosis device, comprising a generator, a rack, and a firing wheel respectively connected to the generator and the rack; further comprising:

[0010] The control circuit includes a current limiting protection unit and at least three switching switches, wherein the at least three switching switches are a first switching switch, a second switching switch, and a third switching switch, and each has a common terminal, a normally closed terminal, and a normally open terminal; the third switching switch switching structure is used to trigger the third switching switch to switch to conduction between the common terminal and the normally open terminal, so that the generator starts under the conduction of the current limiting protection unit; the second switching switch switching structure is used to trigger the second switching switch to conduction between the common terminal and the normally open terminal, so that the current limiting protection unit is disconnected after the generator starts, and the operation of the generator is maintained.

[0011] The first switch switching structure is used to trigger the first switching switch to switch to conduction between the common terminal and the normally open terminal, so as to cut off the current flowing through the generator; the manual retraction anti-reuse structure is used to manually retract the firing rack and disconnect the engagement between the firing wheel and the firing rack.

[0012] Furthermore, the common terminal of the third switch is connected to one end of the generator, the normally open terminal is connected to one end of the current limiting protection unit, and the normally closed terminal is connected to a power supply electrode; the common terminal of the second switch is connected to another power supply electrode, the normally open terminal is connected to the first switching terminal of the third switch, and the normally closed terminal is connected to the other end of the current limiting protection unit; the common terminal of the first switch is connected to the other end of the generator, the normally open terminal is connected to another power supply electrode, and the normally closed terminal is connected to a power supply electrode.

[0013] Furthermore, the firing rack is provided with a first groove having a front inner wall and a rear inner wall; the first switch switching structure includes: a first switching switch having a first switching contact; and a first switching trigger for being movably connected to the anastomosis device, having a first trigger portion adjacent to the switching contact and a first actuating portion inserted into the first groove; one side of the first actuating portion is abutted by the front inner wall, causing the first switching trigger to deflect towards the trigger portion in a direction closer to the switching contact; the other side of the first actuating portion is abutted by the rear inner wall, causing the first switching trigger to deflect away from the trigger portion in a direction away from the switching contact.

[0014] Furthermore, one end of the firing rack is provided with an oblique opening; the second switch switching structure includes: a second switching trigger element, which is placed obliquely in the oblique opening and has a second trigger part on one side; and a second switching switch, which is adjacent to the second trigger part and has a second switching contact that is close to the second trigger part and is contacted by the second trigger part.

[0015] Furthermore, the third switch switching structure includes: a third switching trigger, which is provided with a third trigger part and a coil spring for resetting the third switching trigger; a third switching switch, which is provided with a third switching contact contacted by the third trigger part; a firing handle, which is used to drive the staple cartridge assembly to perform staple engagement and cutting actions, and to drive the third switching trigger to rotate so that the third trigger part contacts the third switching contact; and a mating handle, which is used to drive the staple cartridge assembly to perform mating actions, and to drive the firing handle to be adjacent to the third switching trigger.

[0016] Furthermore, the manual retraction anti-reuse structure includes: a driven retraction wheel, which meshes with the firing rack, is coaxially connected to the firing wheel, and is adjacent to the firing wheel, with a first misaligned engagement portion provided on one end face near the firing wheel; a driving retraction wheel, which is drivenly connected to the driven retraction wheel; and a wrench, used to rotate the driving retraction wheel and press down the driven retraction wheel; wherein, the firing wheel has a second misaligned engagement portion on one end face near the driven retraction wheel, which is engaged by the first misaligned engagement portion, causing the teeth of the firing wheel to misalign with the teeth of the driven retraction wheel.

[0017] A method for controlling a multifunctional stapler includes the following steps:

[0018] Initialization steps: Configure the first trigger part of the first switching trigger to separate from the first switching contact; place the second switching trigger in the inclined hole of the firing rack, and separate the second trigger part from the second switching contact; separate the third trigger part of the third switching trigger from the third switching contact; respectively connect the common terminal of the first switching switch, the second switching switch and the third switching switch to the normally closed terminal;

[0019] Anastomosis steps: Pinch the anastomosis handle to drive the staple cartridge assembly to perform the anastomosis action;

[0020] Firing and current limiting steps: Pinch the firing handle, rotate the third switching trigger to make the third trigger part contact the third switching contact, so as to trigger the third switching switch to switch the common terminal and normally open terminal to conduction, the generator rotates forward and drives the firing rack forward;

[0021] Full-power firing step: The second switching trigger disengages from the inclined outlet and contacts the guide surface. The second switching trigger undergoes elastic twisting, causing the second trigger part to contact the second switching contact, triggering the second switching switch to switch to conduction between the common terminal and the normally open terminal. The generator continues to drive the firing rack forward at full power, and the firing rod is pushed forward by the firing rack to drive the nail cartridge assembly to perform nail engagement and cutting action.

[0022] This solution achieves the following benefits by deeply integrating the current limiting protection unit, at least three switching switches, and a manual back-off anti-reuse structure within the same stapler:

[0023] 1. Dual control of current limiting and full-power firing. After the third switch switching structure is triggered, the motor starts smoothly under the conduction of the current limiting protection unit, avoiding overload impact. The second switch switching structure disconnects the current limiting protection unit after the motor starts, allowing the motor to enter the full-power firing state, thus balancing start-up protection and efficiency.

[0024] 2. Rapid shutdown and multi-switch linkage. The first switch switching structure can switch the first switch to connect the common terminal and the normally open terminal when the firing is completed or an abnormality occurs, quickly cutting off the current flowing through the generator and stopping the motor immediately. Through segmented switching control, the equipment can automatically enter the correct circuit state at each stage, reducing manual intervention and improving safety.

[0025] 3. Manual Retraction and Anti-Reuse Mechanism. When the motor or rack malfunctions, jams, or requires an emergency stop, the operator can use the manual retraction anti-reuse mechanism to disconnect the engagement between the firing wheel and the firing rack. This prevents the equipment from being easily restarted after a malfunction; professional repair or replacement of critical components is required, effectively preventing the misuse of faulty equipment and improving medical safety.

[0026] 4. Multifunctional integration for simplified operation. Current limiting protection, multi-step switching control, and manual retraction anti-reuse functions are integrated into a single device, reducing external circuitry and complex components, making it easier for medical staff to quickly master and use during surgery. Compared to traditional solutions requiring multiple independent modules or additional mechanical designs, this invention achieves multi-stage automatic or semi-automatic control with a more compact structure, improving the reliability and adaptability of the stapler.

[0027] Through the above technical means, this invention significantly improves the safety performance of the stapler while ensuring efficient firing and ease of use. It can achieve both flow-limited start-up and full-power firing under normal conditions, and can avoid secondary injury in case of malfunction through manual retraction and anti-reuse mechanisms. It has significant clinical application value and promotion prospects. Attached Figure Description

[0028] Figure 1 This is a circuit diagram showing the initial state of the motor control circuit.

[0029] Figure 2 This is a circuit diagram showing the firing current-limiting state of the motor control circuit.

[0030] Figure 3 This is a circuit diagram showing the full firing state of the motor control circuit.

[0031] Figure 4 This is a circuit diagram showing the fully fired state of the motor control circuit.

[0032] Figure 5This is a circuit diagram showing the initial state of the motor control circuit during retraction.

[0033] Figure 6 This is a circuit diagram showing the retraction state of the motor control circuit.

[0034] Figure 7 This is a circuit diagram showing the motor control circuit in its fully retracted state.

[0035] Figure 8 This is a circuit diagram showing the reset state of the motor control circuit.

[0036] Figure 9 This is a circuit diagram of the active retraction state during the firing process of the motor control circuit.

[0037] Figure 10 This is a circuit diagram illustrating the manual retraction of the motor control circuit after opening the safety cover.

[0038] Figure 11 The diagram shows the structural breakdown and enlarged partial structure of the anastomosis device switching device.

[0039] Figure 12 A schematic diagram of the structure of the anastomosis switch under two switching states.

[0040] Figure 13 This is a schematic diagram of the two switching states of the anastomosis device's toggle switch switching structure.

[0041] Figure 14 This is a structural breakdown and enlarged schematic diagram of the toggle switch switching structure of the anastomosis device.

[0042] Figure 15 This is a schematic diagram showing the structure of the anastomosis device in both the anastomosis and firing states, including the anastomosis handle, the firing handle, and the third switching switch.

[0043] Figure 16 This is a schematic diagram showing the structural breakdown and enlarged partial structure of the first switching trigger and mounting bracket.

[0044] Figure 17 This is a partial structural diagram of the first switching trigger in two states.

[0045] Figure 18 The diagram shows the structure of the flow-limiting disconnect switch in both decomposed and non-decomposed states.

[0046] Figure 19 This is a structural diagram showing a partial structural breakdown of the present invention.

[0047] Figure 20 This is a schematic diagram of the active retraction structure of the anastomosis device in two states.

[0048] Figure 21 The diagrams show the firing wheel and driven return wheel of the present invention from two different perspectives, as well as enlarged partial structural diagrams.

[0049] Figure 22 This is a structural schematic diagram of another part of the structure of the present invention.

[0050] Figure 23 This is an enlarged schematic diagram of the overall structure and some parts of the present invention.

[0051] Figure 24 This is a schematic diagram of the connection structure between the active retraction wheel and the circuit board of the present invention.

[0052] Figure 25 This is a schematic diagram of the manual retraction process of the stapler of the present invention.

[0053] Figure 26 This is a schematic diagram of the toggle switch switching structure of the anastomosis device of the present invention.

[0054] Figure 27 for Figure 26 A structural diagram of Figure A from another perspective.

[0055] Figure 28 This is a schematic diagram of the anastomosis device toggle switch switching structure of the present invention after it is installed in the mounting bracket. Detailed Implementation

[0056] The present invention will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0057] like Figures 1-10 As shown, a motor control circuit includes a generator 6, a current limiting protection unit, and multiple switching switches. The switching switches include a first switching switch SW1, a second switching switch SW2, a third switching switch SW3, and a fourth switching switch SW0. Each switching switch has a common terminal, a first switching terminal, and a second switching terminal, wherein the first switching terminal is a normally open terminal and the second switching terminal is a normally closed terminal.

[0058] The current limiting protection unit includes a current limiting element, a thermistor, and a current limiting switch 4 connected in series. The current limiting element is a current limiting resistor R, the thermistor is a thermistor PTC, and the current limiting switch 4 has a first terminal S4-1 and a second terminal S4-2. The first terminal S4-1 and the second terminal S4-2 can be switched on and off. The second terminal S4-2 is electrically connected to one end of the current limiting resistor R, and one end of the thermistor PTC is electrically connected to the other end of the current limiting resistor R.

[0059] The third switching switch SW3 has its common terminal connected to the negative terminal of the generator 6, its normally open terminal connected to the other end of the thermistor PTC, and its normally closed terminal connected to the negative terminal of the power supply.

[0060] The second switching switch SW2 has its common terminal connected to the normally closed terminal of the fourth switching switch SW0, its normally open terminal connected to the normally open terminal of the third switching switch SW3, and its normally closed terminal connected to the first terminal S4-1.

[0061] The first switching switch SW1 has its common terminal connected to the positive terminal of the generator 6, its normally open terminal connected to the normally closed terminal of the fourth switching switch SW0, and its normally closed terminal connected to the negative terminal of the power supply.

[0062] The fourth switch SW0 has its common terminal connected to the positive terminal of the power supply, while its normally open terminal is left unused.

[0063] Furthermore, the motor control circuit also includes an indicator light module connected in parallel. Specifically, one end of the indicator light module is electrically connected to the normally closed terminal of the fourth switch SW0, and the other end of the indicator light module is connected to the normally closed terminal of the first switch SW1 and / or the negative terminal of the power supply.

[0064] It should be noted that this motor control circuit can be used in the field of anastomosis devices and other fields with motors.

[0065] A type of anastomosis switch construction, such as Figure 11 , Figure 12 As shown, it includes: a firing rack 5, a second switching trigger 22, and a second switching switch SW2. The firing rack 5 has a first stop 52 at one end; the second switching trigger 22 is placed at an angle to the first stop 52, and has a second trigger part 221 on one side.

[0066] The second switching switch SW2 is disposed adjacent to the second trigger part 221 and has a second switching contact 21 that is adjacent to and contacted by the second trigger part 221.

[0067] Furthermore, the second switching switch SW2 has a plug interface 201 on one side, and the second switching trigger 22 has a pin 222 that fits tightly into the plug interface 201. The second switching trigger 22 is an elastic component with a certain elastic deformation performance. It is used to generate elastic deformation when the second switching trigger 22 is disengaged from the first stop 52, so that when the bottom of the second switching trigger 22 is close to the first stop 52, it is reset and tilted to the first stop 52, thereby separating the second trigger part 221 and the second switching contact 21 of the second switching switch SW2.

[0068] Furthermore, the contact between the second trigger part 221 of the second switching trigger 22 and the second switching contact 21 of the second switching switch SW2 is achieved by the elastic deformation of the bottom of the second switching trigger 22, ensuring that the second switching switch SW2 is continuously pressed; one side of the firing rack 5 is provided with a guide surface 54 that is contacted by the bottom of the second switching trigger 22 and extends toward the first stop 52. When the second switching trigger 22 is placed in the first stop 52, the second trigger part 221 separates from the second switching contact 21 of the second switching switch SW2; when the bottom of the second switching trigger 22 detaches from the first stop 52 and contacts the guide surface 54, the second trigger part 221 contacts the second switching contact 21 of the second switching switch SW2. Specifically, the pointed end of the included angle formed between the guide surface 54 and the guide slope 53 of the first avoidance 52 will abut the bottom of the second switching trigger 22. Since the mounting wall side of the second switching trigger 22 is tightly fixed to the second switching switch SW2 by the pin 222, the bottom of the second switching trigger 22 will undergo a certain elastic torsion due to the abutment of the pointed end of the included angle, so that the second trigger part 221 of the second switching trigger 22 abuts against the second switching contact 21 of the second switching switch SW2, thereby realizing the switching of the second switching switch SW2, that is, the second switching switch SW2 is switched from the conduction of the common terminal and the normally closed terminal to the conduction of the common terminal and the normally open terminal.

[0069] A stapler switch switching structure, such as Figures 26-28 The system includes: a mounting bracket 8, a firing rack 5, a second trigger switching element 23, and a second switching switch SW2. The mounting bracket 8 has a guide groove 87; the firing rack 5 has a second recess 55; the second trigger switching element 23 includes a guide connecting portion 231 inserted into the guide groove 87, and a second contact portion 232 integrally formed with the guide connecting portion 231 and accommodated by the second recess 55; the second switching switch SW2 is adjacent to the second contact portion 232 and has a second switching contact 21 that is adjacent to and contacted by the second contact portion 232. The firing rack 5 has a guide surface 54, the second recess 55 is located at one end of the guide surface 54, and a guide ramp 53 is provided between the second recess 55 and the guide surface 54. See [link / reference] Figure 26 In Figure A, before firing, the second contact portion 232 separates from the second switching contact 21; during firing, the firing rack 5 advances, causing the second contact portion 232 of the second trigger switching member 23 to be lifted, the guide connecting portion 231 rises along the guide slide opening 87, and the second contact portion 232 disengages from the second stop 55 until the second contact portion 232 contacts the second switching contact 21. Figure 26 Figure B shows the switch switching process.

[0070] A toggle switch structure for an anastomosis device, such as Figure 13 , Figure 14 As shown, it includes: a firing rack 5, a first switching switch SW1, and a first switching trigger 12. Specifically: the firing rack 5 has a first groove 51 having a front inner wall 511 and a rear inner wall 512; the first switching switch SW1 has a first switching contact 11; the first switching trigger 12, movably connected to the anastomosis device, has a first trigger part 121 adjacent to the first switching contact 11, and a first actuating part 122 inserted into the first groove 51.

[0071] One side of the first actuating part 122 is abutted by the front inner wall 511, causing the first switching trigger 12 to deflect towards the first trigger part 121 and closer to the first switching contact 11; the other side of the first actuating part 122 is abutted by the rear inner wall 512, causing the first switching trigger 12 to deflect away from the first trigger part 121 and away from the first switching contact 11. The contact between the first trigger part 121 and the first switching contact 11 is achieved by the front inner wall 511 abutting against the first actuating part 122, causing the first switching trigger 12 to deflect. The disconnection between the first trigger part 121 and the first switching contact 11 is achieved by the rear inner wall 512 abutting against the first actuating part 122, causing the first switching trigger 12 to deflect in the opposite direction. Specifically, the first switching trigger 12 deflects in the first direction by abutting the first actuating part 122 against the front inner wall 511, causing the first trigger part 121 of the first switching trigger 12 to contact the first switching contact 11 of the first switching switch SW1, thereby triggering the first switching switch SW1 to switch from the conduction of the common terminal and normally closed terminal to the conduction of the common terminal and normally open terminal. The first switching trigger 12 deflects in the opposite direction to the first direction by abutting the first actuating part 122 against the rear inner wall 512, causing the first trigger part 121 of the first switching trigger 12 to move away from and disconnect from the first switching contact 11 of the first switching switch SW1.

[0072] Furthermore, the first switching trigger 12 is also provided with a hinge portion 123 for movably mounting the first switching trigger 12 on the anastomosis device. Specifically, the first switching trigger 12 deflects based on the hinge portion 123 as a pivot. The hinge portion 123 is a hinge hole, which is hinged by the mounting shaft 86 of the mounting bracket 8.

[0073] Furthermore, such as Figure 18 , Figure 19 , Figure 22As shown, it also includes a current-limiting disconnect switch 4, a current-limiting disconnect trigger 42, and a current-limiting reset knob 43. Specifically: the current-limiting disconnect switch 4 has a current-limiting disconnect contact 41; the current-limiting disconnect trigger 42 has a current-limiting trigger part 421 adjacent to the current-limiting disconnect contact 41, and a first sliding groove 51 extending into the firing rack 5, and is rotated by being abutted by the front inner wall 511, causing the current-limiting trigger part 421 to contact the current-limiting receiving part 422 of the current-limiting disconnect contact 41; the current-limiting reset knob 43 is connected at one end to the current-limiting disconnect trigger 42, and is used to receive manual force to rotate the current-limiting disconnect trigger 42 to reset, causing the current-limiting trigger part 421 to separate from the current-limiting disconnect contact 41, and the current-limiting receiving part 422 to be pushed back into the first sliding groove 51. Specifically, the first terminal S4-1 of the current-limiting disconnect switch 4 is located on the current-limiting disconnect contact 41, and the second terminal S4-2 is located on the current-limiting trigger part 421; or, the first terminal S4-1 is located on the current-limiting trigger part 421, and the second terminal S4-2 is located on the current-limiting disconnect contact 41. In detail, in conjunction with... Figures 1 to 10 In the firing state, the flow-limiting disconnect switch 4 is in the conducting state. After firing, the front inner wall 511 of the firing rack 5 presses against the flow-limiting receiving part 422, causing the flow-limiting disconnect trigger 42 to deflect, thereby disconnecting the connection between the flow-limiting trigger 421 and the flow-limiting disconnect contact 41, and thus disconnecting the flow-limiting disconnect switch 4, causing the current-limiting protection unit to be open-circuited. After firing is completed and the device has fully retracted, the flow-limiting disconnect switch 4 is still in the open state and cannot be automatically reset. Therefore, the stapler cannot be fired again. The current-limiting reset knob 43 must be manually rotated to make the flow-limiting disconnect trigger 42 rotate synchronously to fully reset. In this way, the flow-limiting disconnect switch 4 can effectively prevent accidental firing. At the same time, it can effectively remind the operator that the stapler has been fired and a new staple cartridge assembly 82 must be replaced. The flow-limiting disconnect switch 4 must then be manually reset before the stapler can be fired again. This effectively avoids the situation of cutting and anastomosing with an empty staple cartridge after the staple cartridge assembly 82 has been used, thus increasing the safety factor.

[0074] Furthermore, see Figure 14 In diagram B, the first switching trigger 12 is equipped with a limit protrusion 124. (See diagram B.) Figure 16 The mounting bracket 8 is provided with a limiting protrusion 85 into which the limiting protrusion 124 engages; the mounting bracket 8 is also provided with a mounting shaft 86 hinged to the hinge portion 123 of the first switching trigger member 12. For details, see... Figure 14 , Figure 16 and Figure 17 Two limiting protrusions 124 are provided, namely protrusion 124a and protrusion 124b; three limiting grooves 85 are provided, namely groove 85a, groove 85b and groove 85c. Before the stapler is fired, the first trigger part 121 of the first switching trigger 12 is separated from the first switching contact 11 of the first switching switch SW1. At this time, see Figure 16 and Figure 17 As shown in Figure A, protrusions 124a and 124b respectively engage with grooves 85a and 85b, ensuring the stability of the first switching trigger 12 during firing. This prevents the first trigger part 121 from being displaced and thus avoids poor contact due to misalignment of the first switching trigger 12. Figures 1 to 3 In the process, the first switching switch SW1 always maintains the state of 1-3 being on and 1-2 being off. Until the firing rack 5 is fired to the bottom, the front inner wall 511 of the first slide groove 51 moves the first switching trigger 12, causing it to deflect. At this time, we see... Figure 17 In Figure B, protrusions 124a and 124b respectively engage with protrusions 85b and 85c, ensuring that during the subsequent retraction of the firing rack 5, the first trigger part 121 and the first switching contact 11 remain in contact. Figures 4 to 6 In the process, the first switching switch SW1 always maintains the state of 1-2 being on and 1-3 being off, until the rack 5 is triggered to retract to the bottom, causing the rear inner wall 512 of the first slide groove 51 to deflect and reset the first switching trigger 12.

[0075] An active stop structure for a stapler includes the toggle switch switching structure described in any of the preceding embodiments, and further includes an active stop button 67 with a second slide groove 671 for manually pushing a first switching trigger 12 to deflect. The first switching trigger 12 is also provided with a second actuating part 125 that inserts into the second slide groove 671. The second actuating part 125 has a clearance notch 125a on the side near the active stop button 67. Specifically, when the active stop button 67 moves forward or backward, it actuates the second actuating part 125 of the first switching trigger 12, causing the first switching trigger 12 to rotate, thereby switching the first switching switch SW1 on or off.

[0076] An active retraction structure for an anastomosis device, such as Figures 19-23 As shown, the device includes a generator 6, a firing rack 5, and a firing wheel 62 that meshes with both the generator 6 and the firing rack 5; it also includes a driven return wheel 63 and a driven return wheel 64. The driven return wheel 63 is meshed with the firing rack 5. The driven return wheel 64 is meshed with the driven return wheel 63, and the driven return wheel 64 is provided with a first limiting force application part 641 that allows external force to rotate the driven return wheel 64.

[0077] Furthermore, the active retraction structure of the anastomosis device also includes a guide shaft 65, on which the driven retraction wheel 63 and the firing wheel 62 are coaxially connected. The driven retraction wheel 63 and the firing wheel 62 are movably connected to the guide shaft 65 and can slide along the length of the guide shaft 65. It also includes an elastic element 66 sleeved on the guide shaft 65, the elastic element 66 acting with elastic force on the end of the firing wheel 62 away from the driven retraction wheel 63. It also includes a wrench 7 for rotating the active retraction wheel 64, the wrench 7 having a second limiting force-applying part 71 that matches the first limiting force-applying part 641, allowing force to be applied to the active retraction wheel 64 through the wrench 7. The first limiting force-applying part 641 is a force-applying shaft, and the second limiting force-applying part 71 is a limiting connection port. The force-applying shaft has an external thread, and the limiting connection port has an internal thread that matches the external thread. The wrench 7 is provided with a holding part 72, and the top of the driven return wheel 63 is provided with a pressure receiving part 632 that is abutted by the holding part 72; the wrench 7 is also used to press down the driven return wheel 63 and the firing wheel 62 by pressing the pressure receiving part 632 with the holding part 72. The main body of the stapler is provided with a removable safety cover plate 81, which is located on top of the first limiting force application part 641. Opening the safety cover plate 81 exposes the first limiting force application part 641 of the active return wheel 64, allowing the wrench 7 to be connected and manually applied force to rotate the active return wheel 64.

[0078] In addition, such as Figure 24 As shown, the anastomosis device of this solution also includes a circuit board 88. The circuit board 88 has a connecting port 881. The first limiting force application part 641 of the active retraction wheel 64 is inserted into the connecting port 881 of the circuit board 88, allowing the active retraction wheel 64 to be mounted on the circuit board 88 and rotate relative to it. During actual manual retraction, the wrench 7 is threaded to the first limiting force application part 641 until it is fully engaged, slightly tightening the active retraction wheel 64 and the circuit board 88. The active retraction wheel 64 can then be rotated using the wrench 7. Alternatively, the active retraction wheel 64 can be movably inserted into the circuit board 88 by using a bearing. The active retraction steps are described below. Figure 25 See Figure A to open the safety cover 81. See Figure B to screw in the wrench 7 to disengage the generator 6 from the firing rack 5. See Figure C to turn the wrench 7 clockwise to the end and press the reset button to open the jaws.

[0079] A type of unidirectional drive anastomosis device, such as Figures 19-23As shown, the device includes a generator 6, a rack 5, and a firing wheel 62; it also includes a driven return wheel 63, a driven return wheel 64, a wrench 7, a guide shaft 65, and an elastic element 66. Specifically: the firing wheel 62 is meshed with both the generator 6 and the rack 5; the driven return wheel 63 is coaxially connected to and adjacent to the firing wheel 62, with a first misaligned engagement portion 631 on one end face near the firing wheel 62; the driven return wheel 64 is meshed with the driven return wheel 63; the wrench 7 is used to rotate the driven return wheel 64 and press down the driven return wheel 63; the guide shaft 65 is coaxially inserted through both the firing wheel 62 and the driven return wheel 63, allowing the firing wheel 62 and the driven return wheel 63 to move together. The retractor 63 can slide on the guide shaft 65; the elastic element 66, sleeved on the guide shaft 65, acts on the firing wheel 62, so that the firing wheel 62 is maintained on the guide shaft 65 in a predetermined position that can mesh with the firing rack 5, and provides a restoring force for the firing wheel 62 when the firing wheel 62 is pressed down; wherein, the firing wheel 62 has a second misaligned engagement portion 621 on one end face near the driven retractor 63, which is engaged by the first misaligned engagement portion 631, so that the teeth of the firing wheel 62 are misaligned with the teeth of the driven retractor 63.

[0080] Furthermore, such as Figure 21 As shown in Figures A and B, the first misaligned joint 631 is a misaligned protrusion 631a, and the second misaligned joint 621 is a misaligned groove 621a. When the misaligned protrusion 631a engages with the misaligned groove 621a, the teeth of the firing wheel 62 and the teeth of the driven return wheel 63 are misaligned. One end of the misaligned protrusion 631a is provided with a first one-way limiting surface 631a1, and the other end is provided with a first one-way guiding inclined surface 631a2. One end of the misaligned groove 621a is provided with a second one-way limiting surface 621a1 abutted by the first one-way limiting surface 631a1, and the other end is provided with a second one-way guiding inclined surface 621a2 abutted by the first one-way guiding inclined surface 631a2. This allows for the following: when the misalignment protrusion 631a engages with the misalignment groove 621a, and the driven return wheel 63 rotates clockwise in the direction of the forward movement of the firing rack 5, the driven return wheel 63 and the firing wheel 62 rotate synchronously; while when the misalignment protrusion 631a engages with the misalignment groove 621a, and the driven return wheel 63 rotates counterclockwise in the direction of the retraction of the firing rack 5, the driven return wheel 63 and the firing wheel 62 can rotate relative to each other. If the firing wheel 62 remains stationary while the driven return wheel 63 rotates, unidirectional transmission is achieved.

[0081] Furthermore, the top of the active retracting wheel 64 is provided with a first limiting force application part 641; the wrench 7 is provided with a second limiting force application part 71 that matches the first limiting force application part 641, so that force can be applied to the active retracting wheel 64 by the wrench 7; a safety cover plate 81 is provided on the top of the active retracting wheel 64. Specifically, the second limiting force application part 71 is a limiting connection port with internal threads, and the first limiting force application part 641 is a force application shaft that is fitted into the limiting connection port, and the force application shaft is provided with external threads that match the internal threads.

[0082] Manual retraction process: Open the safety cover 81 to expose the force shaft at the top of the active retraction wheel 64. Align the limit connection port of the wrench 7 with the force shaft and tighten it until the wrench 7 is pressed down and pre-tightened against the active retraction wheel 64. During the pressing process, the holding part 72 of the wrench 7 presses against the pressure receiving part 632 at the top of the driven retraction wheel 63, so as to press down the driven retraction wheel 63 and the firing wheel 62 by a certain stroke until the firing wheel 62 disengages from the firing rack 5, and the elastic element 66 is compressed to generate a restoring force, and the firing wheel 62 is fired. After the firing wheel 62 disengages from the firing rack 5, continuous rotation of the wrench 7 causes the driven return wheel 63 to rotate, allowing the misalignment protrusion 631a to engage with the misalignment groove 621a. At this point, the teeth between the firing wheel 62 and the driven return wheel 63 are misaligned (i.e., their gears are misaligned). Since the driven return wheel 63 is still engaged with the firing rack 5, the teeth between the firing wheel 62 and the firing rack 5 are also misaligned. Under the action of the elastic element 66, the firing wheel 62 is stuck at the bottom of the firing rack 5. At this time, due to the structural design of the first unidirectional guide ramp 631a2 and the second unidirectional guide ramp 621a2, if the wrench 7 is rotated to make the driven return wheel 63 rotate counterclockwise, the driven return wheel 63 can still continue to rotate counterclockwise, causing the firing rack 5 to drive the firing rod to continue to retract, ensuring the manual retraction function.

[0083] On the other hand, the misaligned protrusion 631a is engaged in the misaligned groove 621a. If the wrench 7 is turned to make the driven return wheel 63 rotate clockwise, due to the structural design of the first one-way limiting surface 631a1 abutting against the second one-way limiting surface 621a1, the driven return wheel 63 and the firing wheel 62 will move synchronously. However, the firing wheel 62 is always engaged with the output wheel 61 on the output shaft of the generator 6, and the generator 6 is not working at this time. Therefore, due to the braking effect of the generator 6, the driven return wheel 63 cannot rotate clockwise. Furthermore, this ensures that the teeth between the driven return wheel 63 and the firing wheel 62 are always misaligned, thus preventing the teeth between the firing rack 5 and the firing wheel 62 from realigning with the teeth of the firing rack 5. This avoids the possibility that the firing wheel 62 could slip and re-engage with the firing rack 5 under the pressure of the elastic element 66. In other words, even if the downward pressure of the wrench 7 is withdrawn, the firing wheel 62 and the firing rack 5 cannot re-engage. Preventing the teeth between the firing wheel 62 and the firing rack 5 from re-engaging and resetting prevents the reuse of a faulty stapler. This ensures that even after manually retracting the firing rack 5, a faulty stapler can still achieve the anti-reuse function and effect, effectively avoiding safety hazards caused by reusing a faulty stapler.

[0084] Because the firing wheel 62 cannot re-engage with the firing rack 5, even if the generator 6 drives the firing wheel 62 to rotate, it cannot smoothly drive the firing rack 5 forward or backward. This avoids the possibility of a jammed stapler being reused after manual retraction.

[0085] Specifically, such as Figure 21 As shown, the first misaligned joint 631 is a right-angled trapezoidal protrusion structure, and the second misaligned joint 621 is a trapezoidal groove structure that matches the right-angled trapezoidal protrusion and is engaged by the right-angled trapezoidal protrusion.

[0086] In detail, such as Figure 21 As shown, the second misaligned joint 621 is a trapezoidal protrusion, and the first misaligned joint 631 is a trapezoidal groove that matches the trapezoidal protrusion and is engaged by the trapezoidal protrusion.

[0087] Anastomosis / clamping process: Engaging the anastomosis handle 83 closes the staple cartridge assembly 82 to clamp the tissue to be cut and stapled.

[0088] Firing process: Squeeze the firing handle 84, one end of the firing handle 84 abuts against one end of the third switching trigger 32, causing the third switching trigger 32 to rotate until the third switching trigger 32 contacts the third switching switch SW3, causing the third switching switch SW3 to switch from the common terminal and normally closed terminal to the common terminal and normally open terminal, thereby triggering the firing generator 6 to rotate forward, driving the firing wheel 62 to rotate clockwise. The firing wheel 62 drives the firing rack 5 forward, the firing rack 5 pushes the firing rod forward, and the forward push of the firing rod drives the closed staple cartridge assembly 82 to perform the cutting and stapleing action, completing the cutting and stapleing of the tissue.

[0089] Automatic retraction process: Release the firing handle 84 to reset the third switching trigger 32 and disconnect it from the third switching switch SW3, so that the third switching switch SW3 switches back to the common terminal and normally closed terminal, thereby triggering the generator 6 to reverse, so as to drive the firing wheel 62 to rotate counterclockwise, thereby driving the firing rack 5 and the firing rod to retract.

[0090] In yet another embodiment, such as Figure 19 and Figure 22 As shown, the generator 6 is equipped with a transmission output wheel 61 mounted on the output shaft of the generator 6, and the firing wheel 62 meshes with the transmission output wheel 61.

[0091] A method for controlling the firing of a stapler includes the following steps: initialization step, anastomosis step, firing and current limiting step, full-power firing step, current limiting switch cut-off step, firing to the bottom step, retraction initial step, retraction later stage step, and retraction to the bottom step. Wherein:

[0092] Initialization steps: See the circuit section. Figure 1The first switching switch SW1, the second switching switch SW2, and the third switching switch SW3 are all configured to connect the common terminal and the normally closed terminal (i.e., SW1-SW3 are connected from 1 to 3). The fourth switching switch SW0 is also configured to connect the common terminal and the normally closed terminal (i.e., SW0 is connected from 1 to 2). The current-limiting disconnect switch 4 is configured to connect the first terminal S4-1 and the second terminal S4-2. For the corresponding structural parts, see: Figure 11 and Figure 12 In Figure A, the second switching trigger 22 is placed in the first recess 52 of the firing rack 5, and the second trigger part 221 is separated from the second switching contact 21, corresponding to the conduction of the common terminal and normally closed terminal of the second switching switch SW2. See Figure 13 In Figure B, the first trigger part 121 of the first switching trigger 12 is separated from the first switching contact 11, corresponding to the first switching switch SW1 being connected between the common terminal and the normally closed terminal. See Figure 15 In Figure A, the firing handle 84 is moved away from the third switching trigger 32, and the third trigger part 321 is separated from the third switching contact 31, corresponding to the connection between the common terminal and the normally closed terminal of the third switching switch SW3. (See...) Figure 23 Safety cover 81 is installed on the main body of the stapler, corresponding to the conduction of the common terminal and normally closed terminal of the fourth changeover switch SW0. See Figure 18 and Figure 19 The current limiting trigger part 421 of the current limiting interruption trigger 42 contacts the current limiting interruption contact 41 of the current limiting interruption switch 4, corresponding to the conduction between the first terminal S4-1 and the second terminal S4-2 of the current limiting interruption switch 4.

[0093] Anastomosis steps: Pinch the anastomosis handle 83, see Figure 15 From diagram A to diagram B, after squeezing and engaging the engagement handle 83, the firing handle 84 will be adjacent to the first switching trigger 12. Simultaneously, see... Figure 23 Squeezing the anastomosis handle 83 will drive the staple cartridge assembly 82 to perform an anastomosis action (i.e., the staple cartridge assembly 82 will close).

[0094] Firing and current limiting procedure: Pinch the firing lever 84, see Figure 15 From diagram B to diagram C, the third switching trigger 32 is pushed against by the firing handle 84 and rotated, causing the third trigger part 321 to contact the third switching contact 31 to trigger. Figure 2 The third switching switch SW3 is switched to conduction between the common terminal and the normally open terminal (i.e., 1-2 conduction). At this time, the current limiting protection unit is powered on, the generator 6 rotates forward, and drives the firing rack 5 to push forward.

[0095] Full-power firing steps: see Figure 12From diagram A to diagram B, as the firing rack 5 is pushed forward, the second switching trigger 22 disengages from the first stop 52 until its bottom contacts the guide surface 54. At this point, the second switching trigger 22 undergoes a certain elastic deformation and twists, causing the second trigger part 221 to contact the second switching contact 21, thus achieving... Figure 3 When the second switching switch SW2 is triggered, it switches to conduction between the common terminal and the normally open terminal (i.e., switching from 1-3 conduction to 1-2 conduction), the current limiting protection unit is disconnected, and the generator 6 continues to drive the firing rack 5 forward with full force. The firing rack 5 will drive the firing rod forward, so that the firing rod drives the nail cartridge assembly 82 to perform nail engagement and cutting action.

[0096] Current limiting switch cut-off procedure: After the full-power firing step, see Figure 18 and Figure 19 The firing rack 5 continues to push forward until the front inner wall 511 of the firing rack 5 pushes open the current-limiting receiving part 422 of the current-limiting cut-off trigger 42, causing the current-limiting cut-off trigger 42 to deflect. At the same time, the current-limiting cut-off trigger 42 and the current-limiting reset switch 43 deflect synchronously, and the current-limiting trigger part 421 and the current-limiting cut-off contact 41 separate, thereby realizing... Figure 5 The first terminal S4-1 and the second terminal S4-2 of the medium-limit flow interruptor 4 are disconnected.

[0097] Firing to full extent: After the full-power firing step or the current-limiting switch cut-off step, the firing rack 5 continues to push forward, see... Figure 13 In Figure A, the inner front wall 511 of the first groove 51 of the firing rack 5 will actuate the first actuating part 122 of the first switching trigger 12, causing the first switching trigger 12 to deflect until the first trigger part 121 contacts the first switching contact 11, thereby triggering... Figure 4 The first switching switch SW1 is switched to conduct between the common terminal and the normally open terminal (i.e., switched from 1-3 conduction to 1-2 conduction), which forms an equipotential voltage across the generator 6 to block the current flow and stop the generator 6 from rotating.

[0098] Revert to initial steps: Release the firing lever 84, see Figure 15 From diagram C to diagram B, the third trigger section 321 springs back to its original position and separates from the third switching contact 31 to trigger... Figure 5 The third switching switch SW3 in the middle switches to conduct the common terminal and the normally closed terminal (that is, switches from 1-2 conduction to 1-3 conduction), the generator 6 reverses, and drives the generator rack 5 to retract.

[0099] Retracting steps: Fire rack 5 to retract, see... Figure 12 From diagram B to diagram A, the second switching trigger 22 gradually springs back to its original position and falls back to the first stop 52 until the second trigger part 221 separates from the second switching contact 21, thus achieving triggering. Figure 6The second switching switch SW2 switches to conduct between the common terminal and the normally closed terminal (i.e., switching from 1-2 conduction back to 1-3 conduction). At this time, the second switching trigger 22 has not fully returned to the first avoidance position 52, and the firing rack 5 still has a certain amount of retraction space.

[0100] Steps to retract to the end: Fire rack 5 to continue retracting until you see... Figure 13 From diagram A to diagram B, and Figure 14 When the rack 5 retracts to its final position, the inner rear wall 512 of the first slide groove 51 will actuate the first actuating part 122, causing the first switching trigger 12 to deflect until the first trigger 121 separates from the first switching contact 11 and the contact is broken, thus achieving... Figure 7 The first switching switch SW1 is triggered to switch the common terminal and normally closed terminal to conduct (i.e., switch from 1-2 conduction to 1-3 conduction).

[0101] Warning procedure: Repeat the matching step and / or the current limiting step. If generator 6 does not start and cannot drive the rack forward or backward, it indicates... Figure 23 If the staple cartridge assembly 82 has been used or is not installed, the instrument may become stuck during the flow restriction period. In such cases, it is necessary to replace the staple cartridge assembly 82 to avoid safety hazards caused by firing an empty staple cartridge. After completing the anastomosis procedure, the generator 6 cannot be started directly and a reset procedure is required.

[0102] Reset procedure: Manually toggle the current-limiting reset switch 43, see... Figure 22 , Figure 23 ,as well as Figure 18 Figures A and B show that the current-limiting trigger 42 is deflected in the reset direction until the current-limiting trigger 421 re-contacts the current-limiting contact 41, at which point the current-limiting trigger is achieved. Figure 8 The first terminal S4-1 and the second terminal S4-2 of the current limiting disconnect switch 4 are reconnected. After the reset step, the matching step and / or the firing current limiting step must be performed again to start the generator 6 to rotate and drive the firing rack 5 to move forward and backward.

[0103] Furthermore, the full-power firing step also includes:

[0104] The active retraction step during the firing process is as follows: Push the active stop button 67, push the second toggle part 125 of the first switching trigger 12, causing the first switching trigger 12 to rotate until the first trigger part 121 contacts the first switching contact 11, triggering the first switching switch SW1 to switch to the common terminal and normally open terminal to conduct, forming an equipotential voltage across the generator 6 to block the current flow, and stopping the generator 6 from rotating;

[0105] The firing process is as follows: After the current limiting switch is cut off, if the firing process does not actively retract, the firing rack 5 continues to push forward until the first switching switch SW1 is triggered to switch the common terminal and normally open terminal to conduct, forming an equipotential voltage across the generator 6 to block the current flow, and the generator 6 stops rotating.

[0106] Furthermore, after the full-power firing step, the manual retraction step is also included: opening the safety cover 81, switching the fourth switch SW0 to connect the common terminal and the normally open terminal, stopping the generator 6, exposing the first limit force application part 641 of the active retraction wheel 64, connecting the second limit force application part 71 of the wrench 7 to the first limit force application part 641, manually rotating the wrench 7 to drive the active retraction wheel 64 to rotate, and the driven retraction wheel 63 to rotate synchronously and drive the firing rack 5 to retract.

Claims

1. A multi-functional anastomat characterized by comprising: It includes a generator (6), a rack (5), and a firing wheel (62) that is connected to the generator (6) and the rack (5) respectively; it also includes: The control circuit includes a current limiting protection unit and at least three switching switches, wherein the at least three switching switches are a first switching switch (SW1), a second switching switch (SW2) and a third switching switch (SW3), and each has a common terminal, a normally closed terminal and a normally open terminal. The third switch switching structure is used to trigger the third switch (SW3) to switch to the common terminal and normally open terminal to conduct, so that the generator (6) starts under the conduction of the current limiting protection unit; The second switch switching structure is used to trigger the second switch (SW2) to switch to the common terminal and normally open terminal to conduct, so that the current limiting protection unit is disconnected after the generator (6) starts, and the operation of the generator (6) is maintained. The first switch switching structure is used to trigger the first switching switch (SW1) to switch to the common terminal and normally open terminal to cut off the current flowing through the generator (6); The manual retraction anti-reuse structure is used to manually retract the firing rack (5) and disconnect the engagement between the firing wheel (62) and the firing rack (5); The common terminal of the third switching switch (SW3) is connected to one end of the generator (6), the normally open terminal is connected to one end of the current limiting protection unit, and the normally closed terminal is connected to a power supply electrode. The common terminal of the second switching switch (SW2) is connected to another power supply electrode, the normally open terminal is connected to the first switching terminal of the third switching switch (SW3), and the normally closed terminal is connected to the other end of the current limiting protection unit. The common terminal of the first switching switch (SW1) is connected to the other end of the generator (6), the normally open terminal is connected to another power supply electrode, and the normally closed terminal is connected to a power supply electrode. The firing rack (5) is provided with a first groove (51) having a front inner wall (511) and a rear inner wall (512); the first switch switching structure includes: The first changeover switch (SW1) is provided with a first changeover contact (11); and The first switching trigger (12) is movably connected to the stapler and is provided with a first trigger part (121) adjacent to the switching contact and a first toggle part (122) inserted into the first slide groove (51). One side of the first actuating part (122) is abutted by the front inner wall (511), causing the first switching trigger (12) to deflect in the direction of the trigger part closer to the switching contact; the other side of the first actuating part (122) is abutted by the rear inner wall (512), causing the first switching trigger (12) to deflect in the direction of the trigger part away from the switching contact. One end of the firing rack (5) is provided with a bevel (52); the second switch switching structure includes: The second switching trigger (22) is placed at an angle on the slanted opening (52), and a second trigger part (221) is provided on one side; and The second switching switch (SW2) is disposed adjacent to the second trigger part (221) and has a second switching contact (21) that is adjacent to and contacted by the second trigger part (221). The third switch switching structure includes: The third switching trigger (32) is provided with a third trigger part (321) and a coil spring for resetting the third switching trigger (32); The third switching switch (SW3) is provided with a third switching contact (31) that is touched by the third trigger part (321); The firing handle (84) is used to drive the staple cartridge assembly (82) to perform staple engagement and cutting actions, and to drive the third switching trigger (32) to rotate so that the third trigger part (321) contacts the third switching contact (31). The matching handle (83) is used to drive the staple cartridge assembly (82) to perform the matching action, and to drive the firing handle (84) adjacent to the third switching trigger (32). The manual rollback anti-reuse structure includes: The driven return wheel (63) meshes with the firing rack (5), is coaxially connected with the firing wheel (62), and is adjacent to the firing wheel (62). A first misaligned joint (631) is provided on one end face near the firing wheel (62). The active return wheel (64) is connected to the driven return wheel (63) via a transmission. A wrench (7) is used to rotate the active return wheel (64) and press down the driven return wheel (63). Among them, the firing wheel (62) is provided with a second misaligned engagement part (621) on one end face near the driven return wheel (63), which is engaged by the first misaligned engagement part (631) to make the teeth of the firing wheel (62) misalign with the teeth of the driven return wheel (63).

2. A multi-functional stapler control method, characterized by, The multifunctional stapler control method is applied to the multifunctional stapler of claim 1, and includes the following steps: Initialization steps: Configure the first trigger part (121) of the first switching trigger (12) to separate from the first switching contact (11); place the second switching trigger (22) in the oblique opening (52) of the firing rack (5), and separate the second trigger part (221) from the second switching contact (21); separate the third trigger part (321) of the third switching trigger (32) from the third switching contact (31); make the common terminal of the first switching switch (SW1), the second switching switch (SW2) and the third switching switch (SW3) connected to the normally closed terminal respectively; Anastomosis steps: Pinch the anastomosis handle (83) to drive the staple cartridge assembly (82) to perform the anastomosis action; Firing and current limiting steps: Pinch the firing handle (84), rotate the third switching trigger (32) to make the third trigger part (321) contact the third switching contact (31) to trigger the third switching switch (SW3) to switch the common terminal and normally open terminal to conduction, the generator (6) rotates forward and drives the firing rack (5) forward; Full-power firing step: The second switching trigger (22) disengages from the inclined opening (52) and contacts the guide surface (53). The second switching trigger (22) undergoes elastic twisting, causing the second trigger part (221) to contact the second switching contact (21), triggering the second switching switch (SW2) to switch to the common terminal and normally open terminal conduction. The generator (6) continues to drive the firing rack (5) forward with full power. The firing rod is pushed forward by the firing rack (5) to drive the nail cartridge assembly (82) to perform nailing and cutting action.

3. The multi-functional stapler control method according to claim 2, wherein The full-power firing step also includes: Firing to the end step: Firing rack (5) is pushed forward until the first switching switch (SW1) is triggered to switch the common terminal and normally open terminal to conduction, forming an equipotential voltage across the generator (6) to block the current flow, and the generator (6) stops rotating. Initial retraction steps: Release the firing handle (84), trigger the third switching switch (SW3) to switch the common terminal and normally closed terminal to conduction, the generator (6) reverses, and drives the firing rack (5) to retract; Retraction steps: Activate rack (5) to retract until trigger the second switching switch (SW2) to switch the common terminal and normally closed terminal to conduction; Step to return to the bottom: Activate rack (5) to return until the first switching switch (SW1) is triggered to switch the common terminal and normally closed terminal to conduct.

4. The multi-functional stapler control method according to claim 3, wherein Determine whether the firing rack (5) is stuck in any step between the full-power firing step and the retraction step. If so, perform the following steps: First pre-installation step: Open the safety cover (81); Second pre-installation step: The wrench (7) is connected to the active return wheel (64) and presses down the driven return wheel (63) and the firing wheel (62) until the teeth of the firing wheel (62) separate from the teeth of the firing rack (5) and the elastic element (66) generates elastic force; Anti-reuse steps: The driven return wheel (63) rotates to make the misalignment protrusion (631a) engage in the misalignment groove (621a), the teeth of the firing rack (5) and the firing wheel (62) are misaligned, and the firing wheel (62) is stuck at the bottom of the firing rack (5) under the action of the elastic element (66); Retraction step: The wrench (7) drives the driven retraction wheel (63) to rotate relative to the firing wheel (62), causing the firing rack (5) to retract.

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