WO2022122001A1

WO2022122001A1 - Surgical instrument

Info

Publication number: WO2022122001A1
Application number: PCT/CN2021/136917
Authority: WO
Inventors: 孙宝峰; 孙海盟
Original assignee: 江苏风和医疗器材股份有限公司
Priority date: 2020-12-11
Filing date: 2021-12-09
Publication date: 2022-06-16
Also published as: CN114617597A

Abstract

A surgical instrument, comprising a jaw assembly, a cutting blade assembly (40), a control module (90), and a trigger (60). The trigger (60) comprises a manually triggered safety switch (69); a timing unit and a timing display module (110) are further comprised; when the jaw assembly is in a jaw open state, the control module (90) controls the safety switch (69) to be in a disabled state, and controls a firing switch to be in a disabled state; when the jaw assembly switches from the jaw open state into a jaw closed stated, the control module (90) controls the safety switch (69) to switch from the disabled state into an enabled state; and the safety switch (69) in the enabled state is first triggered, the timing unit is started and starts timing, the timing display module (110) is started, and the firing switch is maintained in the disabled state when the safety switch (69) is in the enabled state. The surgical instrument needs to be triggered by a user by means of an external force so as to switch the working state of the safety switch (69) and then control the working of the timing display module (110) to perform squeezing timing, such that the squeezing timing is started after sufficient preparation, and squeezing time and a subsequent firing effect are ensured.

Description

a surgical instrument

Related applications

This application claims the priority of the Chinese patent application with the application number 202011447454.5 and the title of the invention "a surgical instrument", which was submitted to the China Patent Office on December 11, 2020, the entire contents of which are incorporated herein by reference.

technical field

The invention relates to the technical field of medical instruments, in particular to a surgical instrument that can avoid false triggering.

Background technique

It is well known that intracavitary cutting staplers have been widely used in intracavitary surgery such as the abdominal cavity.

The stapler includes a jaw assembly, a cutting knife assembly and a staple cartridge assembly. First, the jaw assembly is closed to clamp the tissue, then the cutting knife assembly is driven to cut the tissue, while the cutting knife assembly pushes the staple cartridge assembly out of staples to staple the tissue. It should be noted that the tissue has a certain thickness and there is tissue fluid in it. If the stapler clamps the tissue, it will be cut and sutured immediately, and the tissue will not be fully squeezed. As a result, the thickness of the target tissue cannot reach the safe range for effective suturing, and nail formation will occur. Inconsistency, secondary nailing and other phenomena, resulting in postoperative symptoms such as bleeding at the incision and suture. Therefore, it is desirable to sufficiently expel tissue fluid from the clamped tissue by pressing, so as to facilitate the cutting and suturing of the stapler. The prior art waits for a period of pressing time after the jaw assembly is closed, the tissue is sufficiently pressed within the pressing time, and then the tissue is cut and sutured, but the pressing time of the existing stapler does not take into account the adjustment action of clamping and other variables. Factors, the pressing time cannot guarantee a good pressing effect, and the tissue fluid cannot be fully discharged.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention aims to provide a surgical instrument: comprising a jaw assembly, a cutting knife assembly, a control module and a trigger, the trigger is electrically connected to the control module, and the trigger includes Manually triggered jaw opening switch, jaw closing switch and firing switch; the control module controls the jaw assembly to perform jaw opening action according to the trigger state of the jaw opening switch, and The trigger state executes the jaw closing action, the jaw assembly is in the jaw closed state when it is closed to the end, and the jaw assembly is in the jaw open state when the jaw assembly is not closed to the end, and the control module controls the trigger state according to the firing switch The cutting knife assembly performs a knife feeding action; the trigger further includes a manually triggered safety switch; the control module further includes a timing unit set with a preset time for timing; the surgical instrument further includes a timing indicating module is used to instruct the timing unit to reach the preset time, and the timing indicating module is electrically connected to the control module; when the jaw assembly is in the jaw open state, the control module controls the safety switch to be in a failed state , control the firing switch to be in the invalid state; when the jaw assembly changes from the jaw open state to the jaw closed state, the control module controls the safety switch from the invalid state to the valid state; triggering the valid state for the first time When the timing unit reaches the preset time, the control module closes the timing unit, controls the timing indicating module to indicate that the preset time is reached, And control the safety switch to turn from the valid state to the invalid state, and the firing switch to turn from the invalid state to the valid state.

Preferably, when the timing unit is timing and the preset time is not reached, the safety switch is triggered again, and the control module closes the timing unit, and controls the timing indicating module to indicate that the preset time is reached, And control the safety switch to turn from the valid state to the invalid state, and the firing switch to turn from the invalid state to the valid state.

Preferably, when the firing switch is in an effective state and the cutting knife assembly is in the initial state of the cutting knife, the jaw opening switch is triggered, and the control module turns off the timing indication module, and controls the jaw assembly to perform the clamping operation. The mouth opening action, and control the jaw closing switch to turn from the invalid state to the valid state, and control the firing switch to turn from the valid state to the invalid state.

Preferably, when the firing switch in the valid state is triggered, the cutting knife assembly performs the knife feeding action and is in the knife out state, and then operates the stapler to perform the knife retracting action, when the cutting knife assembly changes from the knife out state to the knife retraction completed state , the control module turns off the indication module.

Preferably, when the timing unit is timing and the preset time is not reached, the jaw opening switch is triggered, the control module closes the timing unit, and controls the jaw assembly to perform the jaw opening action, and The safety switch is controlled to change from the valid state to the invalid state, and the jaw closing switch is controlled to change from the invalid state to the valid state.

Preferably, the timing indication module is a timing display module, and the timing display module includes an LED light, and the on or off state of the LED light changes to indicate that the preset time is reached.

Preferably, the timing indication module is a timing sound module, and the timing sound module emits a sound to indicate that the preset time is reached.

Preferably, the timing indication module is further configured to indicate the real-time duration of the timing operation of the timing unit; when the timing unit is turned on, the control module simultaneously turns on the timing indication module.

Preferably, when the timing unit is counting and the preset time is not reached, the jaw opening switch is triggered, and the control module also turns off the timing unit and the timing indication module, and controls the jaw assembly to execute the jaw Open action, and control the safety switch from the valid state to the invalid state, and control the jaw closing switch to turn from the invalid state to the valid state.

Preferably, the timing indication module is a timing display module, the timing display indication module includes a plurality of LED lights, and different lighting numbers of the plurality of LED lights are used to indicate the real-time time length and reach the preset time. time.

Preferably, the timing indication module further includes a buzzer, and the buzzer emits a sound to indicate that the preset time is reached.

Preferably, the timing indication module is a timing sound module, the timing sound module is a buzzer, and the buzzer emits different sounds to indicate the real-time length of time and reaching the preset time.

Preferably, the jaw closing switch and the firing switch are integrated into one switch, and when the switch is triggered in an effective state, if the jaw assembly is in a jaw opening state, the control module controls the jaw assembly A jaw closing action is performed. If the jaw assembly is in a jaw closing state, the control module controls the cutting knife assembly to perform a knife feeding action.

Preferably, the number of the safety switches is two, and when any one safety switch is triggered, the control module performs the same control.

Preferably, the jaw opening switch is only in an inactive state during the advancing and retracting operations of the cutting blade assembly, and is in an active state at other times.

Compared with the prior art, the beneficial effect of the present invention is that: the surgical instrument of the present invention needs to be triggered by the user's external force to switch the working state of the safety switch, thereby controlling the working state of the timing display module, thereby, the working state of the timing display module is It must be triggered by the user's external force to work, and can provide accurate information on the pressing time. On the one hand, before the timing starts, the doctor will have sufficient time to observe and adjust the position of the jaw assembly to clamp the tissue until it reaches the maximum pressure on the tissue. On the other hand, at the best clamping position, the doctor will actively trigger the safety switch to time the pressing time, so as to ensure that the tissue is fully pressed for the preset time, and the tissue enters the best pressing state to ensure the effect of subsequent firing.

Description of drawings

FIG. 1 is a schematic diagram of the external structure of the first embodiment of the surgical instrument of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the first embodiment of the surgical instrument of the present invention;

FIG. 3 is a schematic view of the internal structure of the first embodiment of the surgical instrument of the present invention from a second perspective;

4 is a schematic diagram of a control circuit of the first embodiment of the surgical instrument of the present invention;

5 is a schematic diagram of a control circuit of a fourth embodiment of the surgical instrument of the present invention;

Fig. 6 is the partial structural schematic diagram of the fourth embodiment of the surgical instrument of the present invention;

FIG. 7 is a partial structural schematic diagram of the first embodiment of the surgical instrument of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The user of the surgical instrument may be a clinician, a doctor who manipulates the surgical instrument during surgery to perform surgery. The terms "proximal", "posterior" and "distal", "anterior" are used herein with respect to the clinician manipulating the surgical instrument. The terms "proximal" and "posterior" refer to the part relatively close to the clinician, and the terms "distal" and "anterior" refer to the part relatively far from the clinician. "Left" and "Right" refer to the position of the surgical instrument shown in Figure 1, eg, the end effector is "left" and the cannula is "right". The terms "upper" and "lower" refer to the relative positions of the anvil seat and the staple cartridge seat of the end effector. Specifically, the anvil seat is "upper" and the staple cartridge seat is "lower". It is to be understood that the orientations "near", "rear", "far", "front", "left", "right", "up" and "down" are defined for ease of description, however, surgical instruments can be in many orientations and positions use, so these terms expressing relative positional relationships are not restrictive and absolute. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention. The connection in the present invention includes electrical connection and mechanical connection.

1 to FIG. 4 and FIG. 7 , the present invention provides a surgical instrument, particularly an electric stapler 100 , which includes an operating assembly 10 , a shaft assembly 20 extending from the operating assembly 10 , and a shaft assembly 20 disposed on the shaft. An end effector 30 at one end of the assembly 20 . The stapler 100 further includes a transmission mechanism. The transmission mechanism includes a first transmission mechanism and a second transmission mechanism. The transmission mechanism is located at the operating assembly 10 and the shaft assembly 20. The specific positional relationship and function are described below.

The operating assembly 10 includes a power module, a motor 70 and the above-mentioned first transmission mechanism. The power module is composed of a plurality of electrically connected batteries, which provide electric power to the motor 80; the first transmission mechanism is connected to the motor, and when the motor obtains electric power and works, the motor outputs power to drive the first transmission mechanism to move.

The shaft assembly 20 includes a mandrel 21 and a sleeve 22 sleeved on the mandrel 21. The shaft assembly 20 belongs to the second transmission mechanism. The first transmission mechanism drives the second transmission mechanism to move.

The end effector 30 includes a jaw assembly and a cartridge assembly (not numbered). The jaw assembly includes a cartridge base 31 for operably supporting the cartridge assembly located therein and an anvil 32 pivotally connected to the cartridge base 31, the anvil 32 being in an open position Selectively move between the closed position and the staple cartridge seat 31 and the staple cartridge assembly to clamp or loosen the tissue. One end of the sleeve 22 is connected to the anvil seat 32 of the end effector 30, and the other end is connected to the first transmission mechanism, the first transmission mechanism can drive the sleeve 22 to move backward and forward, and the backward movement of the sleeve 22 The anvil 32 is pivoted upward to open the end effector 30, ie, the jaw assembly of the end effector 30 is opened, and forward movement of the sleeve 21 causes the anvil 32 to pivot downward to close the end effector 30 , the jaw assembly that closes the end effector 30 .

The stapler also includes a cutting blade assembly 40 , which includes a pushing blade 42 and is inseparably secured to the cutting blade 41 . The mandrel 21 has two ends, one end is connected to the first transmission mechanism, and the other end is located in the sleeve 22 . A part of the pushing element 42 is located in the sleeve 22 and is connected with the other end of the mandrel 21 , and the other part of the pushing element 42 is connected with the cutting knife 41 . During cutting and stapling, the cutting knife 41 is located in the space formed between the cartridge seat 31 and the anvil seat 32 of the jaw assembly. The first transmission mechanism can drive the forward and backward movement of the mandrel 21. When the staple cartridge assembly is installed, the mandrel 21 moves forward so that the cutting blade assembly 40 moves forward, cuts the tissue and pushes the staples of the staple cartridge assembly. The staples are pulled out to staple the tissue, and the rearward movement of the mandrel 21 causes the cutter assembly 40 to move rearward to return to the original position. Thus, the stapler realizes the power transmission from the motor 80 to the jaw assembly and the cutting blade assembly 40 through the above-mentioned transmission mechanism.

Thus, the motor 80 first drives the jaw assembly to close through the transmission mechanism to clamp the tissue, then the motor 80 drives the cutting blade assembly 40 forward through the transmission mechanism to cut and staple the tissue, and then the motor 80 drives the cutting blade assembly 40 to retreat through the transmission mechanism. Finally, the motor 80 drives the jaw assembly to open through the transmission mechanism to loosen the tissue, thereby realizing the functions of the stapler for cutting and anastomosis.

The operating assembly 10 further includes a casing, which includes a handle casing and a head casing connected in a positional relationship. The head casing accommodates at least part of the transmission mechanism, and the handle casing can be held by a user. Of course, in some embodiments, the handle housing can also accommodate part of the transmission mechanism at the same time. In some embodiments, the handle cavity of the handle case accommodates the motor 80, the head cavity of the head case accommodates the battery module, the handle cavity is connected to the head cavity, and the first transmission mechanism is located in the head cavity body and handle cavity.

The operating assembly 10 also includes a trigger 60 and a control module 90, which are respectively connected to the power module to obtain electrical power to work. The control module 90 is a circuit board assembly 90', which is accommodated in the housing and includes a detection unit, a control unit, a switch driving unit and a switch unit. The trigger is electrically connected to the detection unit, the detection unit is electrically connected to the control unit, the control unit is electrically connected to the switch driving unit, and the switch driving unit is electrically connected to the switch unit. The detection unit detects the state of the trigger, and when triggered, transmits a signal to the control unit, and the control unit analyzes and processes the signal, and then controls the stapler.

Trigger 60 includes a motor control trigger for controlling the operating state of the motor. When the control unit receives a signal for controlling the motor from this type of trigger, the control unit generates a corresponding low-voltage PWM signal to the switch drive unit, and the switch drive unit converts the low-voltage PWM signal input to the switch unit into a high-voltage signal available to the switch unit. The PWM signal of the voltage is output to the switch unit, thereby controlling the on-off of the switch unit. The power module is connected to both ends of the motor through the switch unit, and the on-off frequency of the switch unit determines whether the power module supplies or powers off the motor 80, thereby determining the running state of the motor—the speed and direction of the motor. In this embodiment, the switch unit includes four Mos switches forming the H-bridge. The on-off of the Mos switches of the H-bridge determines whether the power supply module supplies or powers off the motor 80 , and the switch driving unit is a Mos driving chip. Moreover, the design of the H-bridge enables the control unit to control the H-bridge to realize the forward or reverse rotation of the motor. It should be noted that, the above-mentioned H-bridge control and forward and reverse rotation control of the motor are all in the prior art, and will not be described again. In this embodiment, the control unit is a microcontroller chip.

The motor control trigger of trigger 60 includes a jaw open switch 61, a jaw close switch 62 and a firing switch 63 manually activated by user operation to control motor start and stop. The jaw opening switch 61 , the jaw closing switch 62 and the firing switch 63 respectively have a button arranged on the above-mentioned casing, especially the handle casing. The user operates the button including pressing the button, which can trigger the corresponding switch. The unit inputs an electrical signal to the control unit, and the buttons corresponding to the jaw opening switch 61 , the jaw closing switch 62 and the firing switch 63 are the first button 71 , the second button 72 and the third button 73 respectively. In this embodiment, the jaw opening switch 61 , the jaw closing switch 62 and the firing switch 63 are all normally open switches, and the control module 90 is based on the jaw opening switch 61 , the jaw closing switch 62 and the firing switch 63 respectively. The trigger state is used to control the running state of the motor - start or stop, so as to execute the corresponding action of the stapler. Trigger states include trigger and non-trigger. When triggered, the normally open switch is turned into a closed state, and a low-level signal is generated. The control unit of the control module 90 obtains the low-level signal, controls the motor to start, and continuously obtains a low-level signal, which means that the switch is continuously triggered. When the normally open switch is in the open state, a high level is generated, and the control unit of the control module 90 obtains the high level signal and controls the motor to stop.

Thus, the user operates the second button 72 to trigger the jaw closing switch 62, the control unit controls the motor 80 to run, drives the jaw assembly to perform the jaw closing action, stops operating the second button 72, does not trigger the jaw closing switch 62, and controls The unit controls the motor 80 to stop; the user operates the first button 71 to trigger the jaw opening switch 61 , the control unit controls the motor to run, drives the jaw assembly to perform the jaw opening action, stops operating the first button 71 , and does not trigger the jaw opening switch 61 , the control unit controls the motor to stop; the user operates the third button 73 to trigger the firing switch 63, the control unit controls the motor to run, and drives the cutter assembly to perform the feeding action. When the switch 63 is fired, the control unit controls the motor to stop.

The motor control trigger of the trigger 60 further includes a first travel switch 65, a second travel switch 66, a third travel switch 67 and a fourth travel switch 68 to control the motor to stop. The first travel switch 65 , the second travel switch 66 , the third travel switch 67 and the fourth travel switch 68 are arranged in the casing, especially the head cavity of the head casing, and the user cannot directly trigger it by hand.

The first travel switch 65 and the second travel switch 66 are used to detect whether the jaw assembly is opened or closed and the control module 90 stops the motor to stop the anvil 32 from pivoting. When the anvil seat 32 is in the closed position, the distance between the distal end of the anvil seat 32 and the distal end of the staple cartridge seat 31 in the up-down direction is the smallest, and the two clamp the tissue. At this time, the jaw assembly is in the jaw closed state; The jaw opening action is performed in the closed state, the anvil seat 32 leaves the closed position and enters the open position, and the jaw assembly enters the jaw open state from the jaw closed state; The position includes an open bottom position. At this time, the distance between the distal end of the anvil seat 32 and the distal end of the staple cartridge seat 31 is the largest in the vertical direction, and the two completely release the tissue. At this time, the jaw assembly is in a state where the jaws are opened to the end. The jaw open state includes the jaw fully opened state. The first transmission mechanism includes a matching portion, and the matching portion includes a first protrusion and a second protrusion. When the first transmission mechanism drives the sleeve 22 to move forward and drives the anvil seat 32 to close and rotate, the anvil seat 32 reaches the closed position, the first bump triggers the first travel switch 65, and the control module 90 receives the first travel The signal sent by the switch 65 instructs the motor to stop rotating. At this time, the jaw assembly has been closed in place, and the jaws are in a closed state; the first transmission mechanism is driving the sleeve 22 to move backwards and drive the anvil seat 32 to open and rotate. , the second bump triggers the second travel switch 66 , the control module 90 receives the signal from the second travel switch 66 and instructs the motor to stop rotating. At this time, the jaw assembly has been opened in place, and the jaws are in the state of being fully opened. It should be noted that the first bump and the second bump can be replaced by one bump, and the above-mentioned one bump triggers the first travel switch 65 during the forward movement, and triggers the second travel switch 66 during the backward movement . At this time, the fitting portion includes the above-mentioned one bump.

The third travel switch 67 and the fourth travel switch 68 are used to detect the position of the cutting knife assembly 40 to determine whether the cutting knife assembly cuts to the end or retracts the knife to the end and stops the motor 80 through the control module 90 to stop the cutting knife assembly 40 move. The cutting blade assembly 40 moves under the driving of the above-mentioned transmission mechanism, and moves a moving stroke with a fixed length according to the working mode of the surgical instrument, and moves forward or backward within the moving stroke, and the farthest end of the moving stroke is the front moving forward. The dead point is the position where the cutting is completed, and the nearest end is the starting point of the forward movement and the rear dead point of the backward movement.

As in the above-mentioned cutting knife assembly 40, the cutting knife and the push-knife member are inseparable. After the knife piece drives the cutting knife to move from the initial position to the firing bottom position, that is, after the firing is completed, when the transmission device drives the pushing knife piece to reset to the initial position, the cutting knife is also driven to return to the initial position. In another optional embodiment, the cutting blade and the blade pushing member are provided separately. After the knife pusher drives the cutting knife to move from the initial position to the firing bottom position, that is, after the firing is completed, when the knife pusher is driven to reset to the initial position, the cutting knife does not move with it, but stays in the firing bottom position.

Therefore, in some optional embodiments of the present invention, since the cutting blade may not be reset to the initial position together with the pushing member, that is, not all parts of the cutting blade assembly 40 can reciprocate between the initial position and the firing bottom position. Therefore, the position of the cutter assembly 40 is based on the pusher.

In various embodiments of the present invention, the cutting blade is located in front of the blade pushing member, and the front end of the blade pushing member or the part in contact with the cutting blade can be used as a reference position. When the reference position is at the initial position or the firing bottom position, it can be considered that the pusher is at the corresponding position.

In this embodiment, the initial position is the position where the cutting blade does not contact the tissue, which may be the above-mentioned rear dead center. The firing bottom position is the position after the cutting knife completes the full stroke of the staple cartridge seat, that is, the position after the firing action is completed, which can be the above-mentioned front dead point.

Before firing, the cutting blade assembly 40 is at the initial position; for firing, the cutting blade assembly 40 moves from the initial position to the firing bottom position, cuts the tissue, and stops at the middle point of the moving stroke, or finally reaches the firing bottom position; the knife is retracted , the cutter assembly moves backwards from the middle point or the firing bottom position until it returns to the initial position. It is defined that when the cutting blade assembly 40 is at the initial position, the cutting blade assembly is in the initial state of the cutting blade, and the state when the cutting blade assembly 40 leaves the initial position is the knife-out state, including when it is located at the middle point or at the bottom of the firing position; when the cutting blade assembly is at the bottom of the firing position The cutting knife assembly is in the state of the end of the knife; according to whether the firing occurs, the initial state of the cutting knife is divided into two different states - the state of not firing the knife and the state of retracting the knife. The knife state, if the firing has occurred and is in the initial position, it is in the state of retracting the knife.

The matching portion of the above-mentioned first transmission mechanism further includes a third protrusion and a fourth protrusion. When the first transmission mechanism drives the cutting blade assembly 40 to move forward through the mandrel 21, when it reaches the front dead center, the third bump triggers the third travel switch 67, and the control module 90 receives the signal sent by the third travel switch 67 to The motor is instructed to stop rotating. At this time, the cutting blade assembly 40 cuts to the end; when the first transmission mechanism drives the cutting blade assembly 40 to move backward through the mandrel 31, it reaches the rear dead center, and the fourth bump triggers the fourth travel switch 68. , the control module 90 receives the signal sent by the fourth travel switch and instructs the motor to stop rotating. At this time, the cutting knife assembly is completely retracted, that is, the knife is retracted to the end. It should be noted that the third bump and the fourth bump may be replaced by one bump.

In this embodiment, the first travel switch 65 , the second travel switch 66 , the third travel switch 67 and the fourth travel switch 68 are also normally open switches, which control the motor to stop when triggered.

Further, when the user triggers the firing switch 63 and keeps it triggered, the motor 80 rotates forward, and performs the feeding action until the third stroke switch 67 is triggered, and the control unit controls the motor to stop. At this time, the user releases the third button 73 and no longer triggers When the switch 63 is fired, the control unit automatically controls the motor 80 to reversely rotate to perform the knife retracting action, and the cutting knife assembly 40 moves backward until the fourth travel switch 68 is triggered to stop. Therefore, when the cutting knife assembly 40 finishes firing, the knife is automatically retracted in one step by releasing the third button 61, which saves the user's operation time.

It should be noted that the first component of the first transmission mechanism drives the sleeve 22 to move and then drives the jaw assembly to open and close, and the second component of the first transmission mechanism drives the mandrel 31 to move to drive the cutting knife assembly 40 to advance and retract. For the knife, the first component and the second component do not act at the same time, so as to satisfy the action logic relationship between the jaw component and the cutting blade component 40 . The first assembly includes a first bump and a second bump, or the first assembly includes one bump in place of the first bump and the second bump. The second assembly includes the third bump and the fourth bump, or the second assembly includes one bump in place of the third bump and the fourth bump.

The above is an embodiment in which four stroke switches and protrusions are used to calibrate the opening/closing position of the jaws and the firing/retracting position of the knife in a mechanical manner. However, identifying whether the jaws are opened/closed, and whether the firing/retraction is in place is not limited to the above-mentioned embodiment of using a travel switch to make mechanical contact with the protrusion. In fact, the opening and closing of the jaws, and the firing and retraction of the cutter assembly 40 are accomplished by the motor 80 by driving the sleeve 22 and the mandrel 21, respectively. Therefore, in other alternative embodiments, by detecting the axial displacement of the sleeve 22 and the mandrel 21, or the number of revolutions of the motor 80, it is also possible to identify whether the jaws are opened/closed in place, and whether the cutting blade is in place. Whether the assembly 40 is fired/retracted in place.

Specifically, the opening and closing of the jaws are taken as an example for description. As described above, the motor 80 drives the sleeve 82 to move forward, which can switch the jaw assembly from the open state to the closed state. Conversely, the motor 80 drives the sleeve 82 to move backward, so that the jaw assembly can be switched from the closed state to the open state. During the process of switching the jaw assembly from opening to closing, or switching from closing to opening to the end, the axial movement of the sleeve 82 is a certain distance, and the motor 80 drives the sleeve 82 to move axially for a certain distance. The number is also fixed.

Based on this, in an optional embodiment, a displacement sensor or a proximity sensor may be provided on the sleeve 82 to detect the axial movement distance of the sleeve 82 to determine whether the sleeve 82 moves forward or backward in place, In turn, it reflects whether the jaw assembly is fully closed or fully opened.

The above-mentioned distance detection elements such as displacement sensors or proximity sensors can also be replaced by other forms of structures, such as photoelectric sensors, infrared sensors, etc., which are not listed here.

As can be seen from the above, the principle is to use four position detection units to detect four position states: the cutting blade assembly is at the initial position, the cutting blade assembly is at the cutting end position, the jaw assembly is at the open position, and the jaw assembly is at the closed end position.

The number of motors is one, the first transmission mechanism includes a gear and a clutch mechanism, the gear is driven by the motor, and the gear selectively drives the first component and the second component through the clutch mechanism to achieve an action logic relationship, and the first component can be connected with the clutch mechanism. The matched push rod and the second component may be a rack matched with the clutch mechanism. For the specific structural composition of the first transmission mechanism, please refer to the applicant's previous application CN202010365525.0, which will not be repeated here. Alternatively, the number of motors is two, the first transmission mechanism includes two gears, each gear is driven by a different motor, the first assembly includes a first rack, the second assembly includes a second rack, and the first rack , The second rack is meshed with different gears respectively, and the action logic relationship is realized by starting and stopping of different motors. The above content is the prior art and will not be repeated here.

Further, the casing is also provided with a forced retract button 79 manually pressed by the user, which is mechanically connected to the third travel switch 67 . During the firing action, stop triggering the firing switch, and the motor stops rotating forward, and the cutting knife assembly is not fired to the end at the middle point, the user can choose to force the knife to retract by pressing the forced retract button 79, and the forced retract button triggers the first The three-stroke switch 67, at this time, the control unit receives the low level signal of the switch and starts the motor to reverse, until the fourth stroke switch 69 is triggered to stop the reverse rotation, realizing the forced one-step retraction to the end.

It should be noted that in one execution cycle, the stapler needs to perform the jaw closing action, firing action, retracting action and jaw opening action in sequence to complete the entire working process, and the above four actions corresponding to the entire working process are preferably When the same motor is used to provide power to the first component and the second component of the first transmission mechanism, the control module 90 sequentially drives the motor forward, forward, reverse, and reverse to drive the first components in sequence. , the second component, the second component, the first component, and finally realize the sequential execution of the jaw closing action, the firing action, the retracting action and the jaw opening action.

The trigger 60 also includes a safety switch 69 that is manually triggered by user operation, and is electrically connected to the control module 90 . The safety switch 69 has a button arranged on the above-mentioned casing, especially the handle casing, which is the fourth button 74. The user operates the button including pressing the button, which can trigger the corresponding switch. The switch inputs a power input to the control unit through the detection unit. Signal. The control module 90 also includes a timing unit, which is set with a preset time, for example, 15s. The timing unit starts and starts timing. When the timing reaches the preset time, the timing unit is turned off and the timing is cleared. The timing unit can be a circuit module independent of the microcontroller, or it can be a timing unit that comes with the microcontroller. The stapler also includes a timing indication module, which is electrically connected to the control unit and has two functions: the first function: used to indicate that the timing unit has reached the preset time, and inform the user of the state; the second function: used to instruct the timing unit to count the time The real-time working time length enables the user to know the elapsed time length. When the timing unit is turned on, the control module 90 simultaneously turns on the timing indicating module to realize the second function. For example, if the timing unit counts for 10s, the timing indicating module indicates that 10s has elapsed.

When the jaw assembly is in the jaw open state, the control module 90 controls the safety switch 69 to be in a disabled state, and controls the firing switch 63 to be in a disabled state; when the jaw closing action is performed, the jaw assembly changes from the jaw open state to the jaw closed state , the control module 90 controls the safety switch 69 to change from the invalid state to the valid state, and the jaw closing switch 62 to change from the valid state to the invalid state; the user triggers the safety switch 69 in the valid state for the first time, then the timing unit is turned on and timed, and the timing indication is at the same time The module is turned on; when the timing unit reaches the preset time, the control module 90 closes the timing unit, controls the timing indicating module to indicate that the preset time is reached, and controls the safety switch 69 to change from the valid state to the invalid state, and the firing switch 63 to change from the invalid state to valid state. When the safety switch 69 is in an active state, the firing switch 63 remains in an inactive state, that is, even if the user operates the firing switch 63, the firing switch 63 does not work, and the stapler will not be fired.

As a result, the safety switch 63, the timing unit, and the timing indication module form a pressing holding mechanism that is convenient for the user to know that the pressing has been fully squeezed. The retention mechanism may not allow forward movement of the cutting blade assembly for a certain period of time and keep the jaw assembly closed to enhance the pressing effect of the jaw assembly on the tissue. In the above solution, the combination of the timing unit and the timing indication module, on the one hand, ensures a sufficient amount of pressing time and ensures the pressing effect; . In the above scheme, the valid state and the invalid state of the three switches of the jaw closing switch 62, the safety switch 69 and the firing switch 63 are switched. First, the three actions of jaw closing, pressing timing and firing have a fixed sequence, which must be performed first. The jaws are closed and then squeezed and the timing is finally fired. The two actions before firing are indispensable and cannot be exchanged. Second, only one switch is active between the three switches at the same time to ensure that the three actions cannot affect each other. In the above solution, the above-mentioned safety switch 69 is convenient for the doctor to control the timing of when to start pressing the holding mechanism: in the use of the stapler, one closing of the jaw assembly to clamp the tissue may not be in place in one step, for example, the tissue may be clamped crookedly. , Too many clips or too few clips, need to be adjusted. If the pressing timer is turned on without sufficient preparation, the actual pressing time will be insufficient although the timing of the timing indicator module has ended. The doctor cannot accurately know the actual pressing time, and the tissue fluid is not fully discharged. Start firing, the firing effect is poor, and in the above scheme, the above-mentioned safety switch 69 is used to start the pressing timing, on the one hand, before the timing starts, the doctor will have sufficient time to observe and adjust the position of the jaw assembly to clamp the tissue until it reaches The optimal clamping position for the tissue, on the other hand, when the optimal clamping position is in place, the doctor actively triggers the safety switch 69 to time the pressing time to ensure that the tissue is fully pressed for the preset time, and the tissue enters the optimal pressing state to ensure The effect of subsequent shots.

When the press retention mechanism is closed, either the press timing action is complete and the stapler can perform the firing action, or the press timing action is interrupted and the stapler returns to the jaw action without firing. Specifically, there are three ways to close the press holding mechanism:

The first way: as described above, when the timing unit reaches the preset time, the control module 90 turns off the timing unit, controls the timing indicating module to indicate that the preset time is reached, and controls the firing switch 63 to change from the invalid state to the valid state, and controls the The safety switch 69 goes from the active state to the inactive state. That is, the pressing timing action is completed. In the above scheme, when the preset time is reached, the pressing holding mechanism is automatically turned off, and the firing switch becomes effective, which ensures sufficient pressing time and can improve the pressing effect; Completed, the doctor can choose when to fire independently, for example, start firing after doing some preparations to improve the user experience.

The second method: If the doctor thinks that the tissue to be cut and sutured is suitable for direct cutting and suture or short-term pressing, it is not necessary to perform pressing for a certain period of time. To save time, the second method can be used - the safety switch 69 is in the In the valid state, the safety switch 69 is triggered for the first time, and when the timing unit is timing and the preset time is not reached, the safety switch 69 is triggered again, the control module 90 closes the timing unit, and controls the timing indicating module to indicate that the preset time is reached. Set the time, and control the safety switch 69 from the active state to the inactive state, and control the firing switch 63 from the inactive state to the active state. That is, the pressing timing action is completed. Although the timing module has not reached the preset time, the timing indication module indicates that the preset time has been reached, and its purpose is to indicate to the user that the pressing timing action is completed and can be fired. In the above solution, the user does not want to wait and actively closes the pressing and holding mechanism to improve the user experience; at the same time, the timing indication module still indicates that the preset time has been reached, so as to remind the user that the shot can be fired at any time and improve the user experience.

The third method: When entering the pressing timing action, it is possible that the doctor needs to readjust the jaw assembly to clamp the tissue, and does not need to enter the firing action. At this time, the third method can be adopted - the safety switch 69 is in an effective state, the first time Trigger the safety switch 69, when the timing unit is timing and the preset time is not reached, trigger the jaw opening switch, the control module 90 closes the timing unit and the timing indication module, and controls the jaw assembly to perform jaw opening act, and control the safety switch 69 to change from the valid state to the invalid state, and control the jaw closing switch to turn from the invalid state to the valid state. That is, the pressing timing action is interrupted. During the pressing timing action, the jaw opening switch remains active all the time. The above scheme, for the user to actively close the pressing holding mechanism, can also return to the jaw open state at any time during the pressing timing action and perform the jaw closing action again to perform a new clamping position adjustment. More time to consider whether to fire, improve the ease of operation of the stapler, and improve the user experience. It should be noted that when the safety switch 69 is in an active state, if the safety switch 69 is not triggered for the first time, and the timing unit and the timing indicating module are not activated, the jaw assembly can still be opened by triggering the jaw opening switch to achieve the above. Purpose.

In the first and second ways above, when the pressing timing action is completed, the timing indication module will keep indicating the preset time to inform the stapler that the pressing has been completed and the user can fire at any time. Further, there can be the following two action options: the first action option is conventional firing, the user triggers the firing switch 63, and the stapler executes the knife feeding action, and the second action option is to close the timing indication module and return in the execution sequence. To perform the jaw action, as follows: when the firing switch 63 is in an active state and the cutter assembly 40 is in the initial state of the cutter, the jaw opening switch 61 is in an active state, triggering the jaw opening switch 61, the control module 90 Turn off the timing indication module, control the jaw assembly to perform a jaw opening action, and control the jaw closing switch 62 to change from a disabled state to an active state. When the pressing timing action is completed by the first method and the second method, the user can fire for the first time at any time. At this time, the above solution (ie, the second action option) provides the user with the possibility of returning to the jaw closing action. Select to perform a new clamping position adjustment. Such a design has the same effect as the third method, so that the doctor has more time to consider whether to activate or not before firing, which improves the ease of operation of the stapler and improves the user experience.

Above, the completion of the operation of the pressing holding mechanism includes: pressing the fourth button 74 and releasing it immediately, the timing unit and the timing indicating module start to work until the work is completed and the preset time is reached; the operation of the pressing holding mechanism is terminated includes: pressing the fourth button 74 and immediately Release, press the fourth button 74 again within a preset time and release it immediately; the operation of the pressing holding mechanism is interrupted includes: pressing the first button 71 . The preset time, the pressing duration, can also be set to 10 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds and 60 seconds, the pressing effect of 10 seconds is less effective, but acceptable, between 15 seconds and 60 seconds In the interval of seconds, the longer the time, the better the squeezing effect, but the squeezing effect does not increase linearly with the extension of time, but if it exceeds 15s, the user will feel that the waiting time is too long, which will affect the user's experience. Setting the pressing hold time to 15 seconds is a balance between waiting time and pressing effect.

After the above-mentioned pressing timing action is completed, the firing action is entered, and the user operates the firing switch 63 to execute the knife feeding action, and then execute the knife retracting action. Close the timing indicator module to enter the jaw opening action. That is to say, during the firing action and the retracting action, the timing indication module will also keep an indication state, that is, the preset time is reached, indicating that the pressing has been completed. Such timing indication module is a good reminder for the doctor. When the cutting knife assembly is in the state of readying to take out the knife or the knife is out of the knife, the cutting knife is about to be applied to human tissue or is being applied to human tissue, so it should be handled with caution; when the knife is completely retracted, the timing indicator module will be closed at the same time, and this closing action will play a role in The function of prompting the user to withdraw the knife to complete, the cutting knife 42 enters a safe position and cannot act on human tissue. Conversely, if the timing indication module is turned off when the pressing timing action is completed and the firing switch 63 is triggered for the first time, the above beneficial effects cannot be achieved. good.

The maximum time length indicated by the timing indication module is the above preset time.

In this embodiment, the timing indication module is a timing display module 110 disposed on the casing, especially the head casing, which can be directly observed by the user, and includes an indicator light. For example, the indicator light includes a plurality of LED lights, and multiple LED lights are lit in sequence, the first LED light is lit to indicate the start of the timing, and the last LED light is lit to indicate the end of the timing. The number, arrangement, color and lighting time interval of LED lights can be set as required. For example, 4 LED lights can be set and arranged on the handle assembly in a linear manner. The control module lights up 1 LED every 5 seconds. The number of lights on in real time is the real-time length of time that indicates the timing operation of the timing unit. After the timing is over, all LED lights remain on, indicating that the timing unit has reached the preset time, and 15 seconds have elapsed when all four LEDs are lit. Other numbers of LED lights, such as 5, 6, etc., can also be selected. The lighting time interval can also be set, for example, 1 second, 4 seconds, 10 seconds, etc. In other embodiments, multiple LEDs are turned off in sequence, all LED lights are turned on to indicate the start of timing, and when only the last LED light is turned on to indicate the end of timing, the last LED is turned on before the firing action is completed. The LED remains lit. When the firing action is completed, the last-minute LED light is turned off, that is, the timing indication module is turned off. The above-mentioned way of using the timing display module, the change of the on or off state of the LED light indicates that the preset time has been reached, and the change of the on state means that the number of lights on is gradually increased, and the increase to the predetermined number means that the preset time has been reached. Time, the state of turning off changes, that is, the number of turning off gradually increases, and the increase to another predetermined number means that the preset time is reached.

The timing indication module also includes an alarm, and when the timing ends, a sound is emitted to indicate the end of the timing. The alarm is a buzzer, and the duration of the buzzer sound can be set as required.

The invalid state of the above switch means that the switch is triggered, but the stapler does not perform an action, and the valid state means that the switch is triggered and the stapler performs the corresponding action. In this embodiment, when the switch is triggered in the failure state, the switch still sends a signal to the control module, but the control module 90 does not analyze and process the signal, nor does it instruct the motor to act or control the timing unit or control the timing display module according to the signal. 110. On the contrary, if the switch is triggered in the valid state, the control module 90 will execute corresponding control according to the signal. The first limit switch 65 , the second limit switch 66 , the third limit switch 67 and the fourth limit switch 68 are always in a valid state by default after the stapler is powered on, and the above-mentioned jaw closing switch 62 , safety switch 63 and firing switch 69 As described in the above solution, it is switched between the valid state and the invalid state, and the jaw opening switch 61 is only in the invalid state during the tool feeding action and the tool retracting action, and is in the valid state at the rest of the time.

Second Embodiment

Different from the first embodiment, the timing indication module is a timing sound module arranged in the casing and can be heard by the user. The difference is that the timing sound module uses different sounds, such as duration, volume, tone, etc., to indicate the real-time length of the timing unit timing operation. Different tones are used to indicate the start of 0s, 5s, 10s, and 15s, respectively, and continuous or intermittent “hair” is issued to indicate that the preset time is reached. A variety of ways can provide real-time sound indication of the length of time, and I will not list them one by one.

Third Embodiment

Different from the second embodiment, the timing indication module of the third embodiment only has the above-mentioned first function: it is used to indicate that the timing unit has reached the preset time and inform the user of this state, and no longer has the above-mentioned second function. Therefore, the control of the second function is cancelled: in the third embodiment, when the timing unit is turned on, the timing indicating module will not be turned on at the same time, and only when the timing unit reaches the preset time, the timing indicating module will be turned on and indicate that the preset time is reached ; When the timing unit is timing and the preset time is not reached, trigger the jaw to open the switch, then the control module only needs to close the timing unit, and does not need to close the timing indicating module.

Correspondingly, the above-mentioned timing display module 110 of the third embodiment includes an LED light, when the timing unit reaches the preset time or when the safety switch is triggered for the second time as mentioned above, the LED light is lit, and continues to light up to indicate The preset time is reached.

In other embodiments, the above-mentioned timing indication module may be a timing sound module for sound indication, which is a buzzer, and the buzzer is turned on only when the timing unit reaches the preset time or when the safety switch is triggered for the second time as described above. The buzzer will sound, and will continue to sound to indicate that the preset time is reached, and the timing sound module will not be turned on during the timer timing.

Fourth Embodiment

As shown in FIG. 5 and FIG. 6 , different from the first embodiment described above, the jaw closing switch 62 and the firing switch 63 of the fourth embodiment are integrated into one switch—the closing/firing switch 62 ′, which effectively When the switch is triggered in the state, if the jaw assembly is in the jaw open state, the control module 90 will control the jaw assembly to perform the jaw closing action when receiving the signal sent by the jaw assembly, if the jaw assembly is in the jaw closed state, When the control unit receives the signal sent by it, it controls the cutting knife assembly 40 to perform the knife feeding action. When the third travel switch is triggered, the closing/firing switch 62' changes from the triggered state to the non-triggered state, then the control unit controls The cutter assembly 40 performs automatic one-step retraction to the end. Specifically, the operation process of the closing/firing switch 62' is as follows: 1) the jaw assembly is in an open state of the jaws, the closing/firing switch 62' is in an active state, the closing/firing switch 62' is triggered, and the control module controls the execution of the jaws Closing action; 2) When the jaw assembly is closed to the end, the jaw assembly turns to the jaw closed state, and the closing/fire switch 62' turns to the invalid state; 3) Trigger the safety switch 69, and activate the pressing holding mechanism until the pressing timing action is completed , or trigger the safety switch 69 again, at this time the safety switch 69 fails, and the closing/firing switch 62' is turned into a valid state; 4) triggering the closing/firing switch 62' again, the control module 90 controls the execution of the firing action; 5) After the cutting is completed - After cutting to the end, stop triggering the closing/shooting switch 62', and perform the automatic one-step retracting action of the knife to the end, until the retracting is completed, the cutting knife assembly 40 is in the retracting completed state, and the closing/shooting switch 62' turns to the invalid state . Further, as shown in FIG. 6 , the closing/firing switch 62' is triggered by one key, namely the second key 72, and the third key 73 is not provided.

Fifth Embodiment

Different from the second embodiment above, the number of the safety switches 69 in the fifth embodiment is two, the two safety switches 69 jointly perform the same function, and the valid state and the invalid state of the two safety switches are simultaneously controlled. Switch and keep consistent: The jaw assembly changes from the jaw open state to the jaw closed state, then the two safety switches change from the invalid state to the valid state; the first time any safety switch in the valid state is triggered, the timing unit is turned on and timed , the timing display module is turned on; when the timing reaches the preset time, the two safety switches will change from the valid state to the invalid state; when the timing does not reach the preset time, trigger any safety switch in the valid state for the second time, then Both cutouts go from active to inactive. That is, when any one of the safety switches is triggered, the control module 90 performs the same control. Further, each safety switch has a button, and the two buttons are located on both sides of the above-mentioned casing, especially the handle casing. No matter which one of the two buttons is pressed by the user, the same function is jointly performed. The principle is not as above. Repeat. Further, the pressing directions of the two keys are opposite and the two are fixedly connected, so that when one is pressed, the other cannot be pressed at the same time, which avoids the control conflict caused by the simultaneous triggering of the two safety switches.

It should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution. This description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole, and each The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Changes should all be included within the protection scope of the present invention.

Claims

A surgical instrument comprising a jaw assembly, a cutting blade assembly, a control module and a trigger,

The trigger is electrically connected to the control module, and the trigger includes a manually triggered jaw opening switch, a jaw closing switch and a firing switch;

The control module controls the jaw assembly to perform the jaw opening action according to the trigger state of the jaw opening switch, and performs the jaw closing action according to the trigger state of the jaw closing switch. When the jaw assembly is closed to the end In the jaw closed state, the jaw assembly is in the jaw open state when the jaw assembly is not closed to the end, and the control module controls the cutting knife assembly to perform the knife feeding action according to the trigger state of the firing switch;

It is characterized by:

The trigger also includes a manually triggered safety switch;

The control module further includes a timing unit provided with a preset time for timing;

The surgical instrument further includes a timing indication module for instructing the timing unit to reach the preset time, and the timing indication module is electrically connected to the control module;

When the jaw assembly is in the jaw open state, the control module controls the safety switch to be in a failed state and controls the firing switch to be in a failed state; when the jaw assembly changes from the jaw open state to the jaw closed state, the The control module controls the safety switch to change from the invalid state to the valid state; triggering the safety switch in the valid state for the first time, the timing unit is turned on and timed;

When the timing unit reaches the preset time, the control module closes the timing unit, controls the timing indicating module to indicate that the preset time is reached, and controls the safety switch to change from an effective state to an ineffective state, The firing switch transitions from an inactive state to an active state.
The surgical instrument according to claim 1, wherein when the timing unit is counting and the preset time is not reached, and the safety switch is triggered again, the control module closes the timing unit and controls the The timing indication module indicates that the preset time is reached, and controls the safety switch to change from an active state to an inactive state, and the firing switch to change from an inactive state to an active state.
The surgical instrument according to claim 1 or 2, wherein when the firing switch is in an active state and the cutting knife assembly is in an initial state of the cutting knife, the jaw opening switch is triggered, and the control module The timing indication module is turned off, the jaw assembly is controlled to perform the jaw opening action, the jaw closing switch is controlled to change from a failed state to an active state, and the firing switch is controlled to be turned from an active state to a failed state.
The surgical instrument according to claim 1 or 2, characterized in that, when the firing switch in the valid state is triggered, the cutting knife assembly performs a knife feeding action and is in a knife out state, and then operates the stapler to perform a knife retracting action. When the knife assembly changes from the knife out state to the knife retraction completed state, the control module turns off the indication module.
The surgical instrument according to claim 1 or 2, wherein when the timing unit is counting and the preset time is not reached, the jaw opening switch is triggered, and the control module closes the timing The unit controls the jaw assembly to perform a jaw opening action, and controls the safety switch to change from an active state to an inactive state, and controls the jaw closing switch to change from an inactive state to an active state.
The surgical instrument according to claim 1 or 2, wherein the timing indication module is a timing display module, and the timing display module includes an LED light, and the on or off state of the LED light changes to indicate that the the preset time.
The surgical instrument according to claim 1 or 2, wherein the timing indication module is a timing sound module, and the timing sound module emits a sound to indicate that the preset time is reached.
The surgical instrument according to claim 1 or 2, wherein the timing indication module is further configured to indicate the real time length of the timing operation of the timing unit;

When the timing unit is turned on, the control module simultaneously turns on the timing indication module.
The surgical instrument according to claim 8, wherein when the timing unit is counting and the preset time is not reached, the jaw opening switch is triggered, and the control module further turns off the timing unit and the opening switch. The timing indication module controls the jaw assembly to perform the jaw opening action, and controls the safety switch to change from the valid state to the invalid state, and controls the jaw closing switch to turn from the invalid state to the valid state.
The surgical instrument according to claim 9, wherein the timing indication module is a timing display module, the timing display indication module comprises a plurality of LED lights, and different lighting numbers of the plurality of LED lights are equal to Indicates the length of time in real time and the preset time is reached.
The surgical instrument according to claim 10, wherein the timing indication module further comprises a buzzer, and the buzzer emits a sound to indicate that the preset time is reached.
The surgical instrument according to claim 9, wherein the timing indication module is a timing sound module, the timing sound module is a buzzer, and the buzzer emits different sounds to indicate the real-time length of time and reach the preset time time.
The surgical instrument according to claim 1 or 2, wherein the jaw closing switch and the firing switch are integrated into one switch, and when the switch is triggered in an effective state, the jaw assembly is in the jaw In an open state, the control module controls the jaw assembly to perform a jaw closing action. If the jaw assembly is in a jaw closed state, the control module controls the cutting knife assembly to perform a knife feeding action.
The surgical instrument according to claim 1 or 2, wherein the number of the safety switches is two, and when any one safety switch is triggered, the control module performs the same control.
The surgical instrument according to claim 1 or 2, wherein the jaw opening switch is only in an inactive state during the advancing and retracting operations of the cutting blade assembly, and is in an active state at other times.