Triggering mechanism, firing assembly, and electric stapler

Abstract

The present application provides a triggering mechanism, a firing assembly, and an electric stapler. The triggering mechanism comprises: a first switch and a second switch, wherein the first switch is configured to, when triggered, initiate movement of an actuating mechanism of the electric stapler in a distal direction, and the second switch is configured to, when triggered, initiate movement of the actuating mechanism in a proximal direction; and a handle component and a triggering component, the handle component comprising a driving part. When the handle component is driven to move in a first direction, the driving part triggers the first switch by means of the triggering component; when the handle component is driven to move in a second direction, the driving part triggers the second switch by means of the triggering component. The present application effectively reduces misoperation of the electric stapler.

Description

Trigger mechanism, firing assembly and powered anastomat TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a trigger mechanism, a firing assembly and a powered anastomat. BACKGROUND

[0002] A powered anastomat is a surgical instrument for tissue anastomosis and resection, which generally realizes the clamping and cutting of tissue through a precise mechanical structure and is widely used in surgical operations. The powered anastomat generally comprises an instrument platform and a cartridge assembly connected to the distal end of the instrument platform. The instrument platform is provided with a firing assembly, which comprises an actuating rod, a motor and a start button. The start button comprises a first button for driving the motor to rotate forward and a second button for driving the motor to rotate reversely. The motor is used to drive the actuating rod to move in the distal direction to drive the cartridge assembly to close and fire when the motor is started to rotate forward, and to drive the actuating rod to retreat in the proximal direction to open the jaw of the cartridge assembly when the motor is started to rotate reversely. During the operation, the jaw of the cartridge assembly is first closed by the firing assembly to clamp the tissue, and then the cartridge assembly is driven by the actuating rod to perform the cutting and suturing action. After the firing of the anastomat is completed, the actuating rod retreats to open the jaw of the cartridge assembly.

[0003] In actual application, the surgical scene is complex and changeable. During the operation, the doctor often needs to repeatedly adjust the position of the powered anastomat. In the prior art, the start button is used to control the start of the motor. The different buttons are easy to be confused, and different operation modes are also easy to be confused when the doctor holds the instrument in different ways, which can easily cause the doctor's misoperation and affect the normal operation of the operation. SUMMARY

[0004] In view of the problems in the prior art, the purpose of the present application is to provide a trigger mechanism, a firing assembly and a powered anastomat. Different switches are triggered by the different direction movements of the handle component through the trigger component. The use of the handle component is more in line with the operation habit of the doctor and is not easy to cause misoperation.

[0005] The first aspect of the present application provides a trigger mechanism for a powered anastomat, which comprises: a first switch and a second switch, the first switch being configured to be triggered to start the actuating mechanism of the powered anastomat to move in the distal direction, and the second switch being configured to be triggered to start the actuating mechanism to move in the proximal direction.

[0006] The handle component and the trigger component, the handle component comprising a driving part;

[0007] When the handle component is driven to move in the first direction, the driving part triggers the first switch through the trigger component; and when the handle component is driven to move in the second direction, the driving part triggers the second switch through the trigger component.

[0008] In some embodiments, the driving part of the handle component comprises a first driving part and a second driving part, and the triggering part comprises a first triggering piece and a second triggering piece;

[0009] When the first driving part is driven to move in the first direction, the first triggering piece is driven to move so as to trigger the first switch; and when the second driving part is driven to move in the second direction, the second triggering piece is driven to move so as to trigger the second switch.

[0010] In some embodiments, the first switch and the second switch are respectively located on the two sides of the shaft center of the electric anastomat.

[0011] In some embodiments, the first triggering piece comprises a first pivot part, and the second triggering piece comprises a second pivot part, and the first pivot part and the second pivot part are respectively rotatably installed on the two sides of the frame of the electric anastomat.

[0012] In some embodiments, the first side of the first pivot part is provided with a third driving part, and the second side of the first pivot part is provided with a first triggering part, and the third driving part is configured to be driven to move by the first driving part so as to trigger the first switch by the first triggering part.

[0013] The first side of the second pivot part is provided with a fourth driving part, and the second side of the second pivot part is provided with a second triggering part, and the fourth driving part is configured to be driven to move by the second driving part so as to trigger the second switch by the second triggering part.

[0014] In some embodiments, the second side of the first triggering piece is further provided with a first limiting part, and the first limiting part is at least partially located between the first switch and the frame.

[0015] The second side of the second triggering piece is further provided with a second limiting part, and the second limiting part is at least partially located between the second switch and the frame.

[0016] In some embodiments, the handle component comprises a fitting part and a handle, the fitting part comprises the first driving part, and the handle comprises the second driving part, and the handle is configured to be driven to move in the first direction so as to drive the fitting part to move in the first direction.

[0017] In some embodiments, the handle component further comprises a first biasing part, and the first biasing part is configured to apply a biasing force to the fitting part so as to move the fitting part in the second direction.

[0018] In some embodiments, the handle component further comprises a limiting part and a second biasing part, the limiting part is configured to block the fitting part from moving in the second direction from an initial position, and the second biasing part is configured to apply a biasing force to the handle so as to move the handle in the first direction relative to the fitting part.

[0019] In some embodiments, the first switch and the first driving part are respectively located at least partially on two longitudinal sides of the first trigger, and the second switch and the second driving part are respectively located at least partially on two longitudinal sides of the second trigger.

[0020] In some embodiments, the first trigger and the second trigger are respectively rotatably mounted on a frame of the anastomat.

[0021] In some embodiments, the first switch and the second switch are arranged along an axial direction of the anastomat.

[0022] In some embodiments, the first trigger and the second trigger are arranged along an axial direction.

[0023] In some embodiments, the second switch is located on a proximal side of the first switch, and the second trigger is located on a proximal side of the first trigger.

[0024] In some embodiments, the first driving part is at least partially located between the first trigger and the second trigger, and the second driving part is at least partially located between the first trigger and the second trigger.

[0025] In some embodiments, the handle part comprises a handle body rotatably connected to a housing of the anastomat, and the first driving part and the second driving part are located on a side of the handle body facing the first trigger and the second trigger.

[0026] In some embodiments, the handle part further comprises a cooperating part rotatably connected to the handle body, and the handle body is configured to drive the cooperating part to move in the first direction when the handle body is driven to move in the first direction; the cooperating part is connected to the first elastic part and configured to provide an elastic force to the cooperating part to move in the second direction; and the second elastic part is arranged between the cooperating part and the handle body.

[0027] In some embodiments, the trigger mechanism further comprises a limiting part, the cooperating part is provided with a stop groove, and the limiting part is at least partially embedded in the stop groove and blocks the movement of the cooperating part in the second direction from the initial position.

[0028] In some embodiments, the first switch is provided with a first contact and a second contact, the trigger is arranged on a side of the handle part facing the first switch and the second switch, and the trigger is configured to trigger the first contact to start the movement of the actuating mechanism in the distal direction when the trigger is driven by the handle part to move in the first axial direction of the anastomat, and the trigger is configured to trigger the second contact to start the movement of the actuating mechanism in the proximal direction when the trigger is driven by the handle part to move in the second axial direction of the anastomat.

[0029] In some embodiments, the trigger comprises a trigger body, a first trigger part and a second trigger part, the first trigger part and the second trigger part are arranged along an axial direction, and are arranged on a side of the trigger body facing the first switch and the second switch.

[0030] In some embodiments, the side of the first trigger part opposite to the first contact part is a first inclined guide surface, and the side of the second trigger part opposite to the second contact part is a second inclined guide surface.

[0031] In some embodiments, the handle part comprises a handle body, the handle body is rotatably connected to the housing of the anastomat, when the handle body is rotated in a first direction, the handle body drives the trigger part to move in a first axial direction, when the handle body is rotated in a second direction, the handle body drives the trigger part to move in a second axial direction, the second axial direction is opposite to the first axial direction.

[0032] In some embodiments, the handle body comprises a driving part, and the trigger part comprises a connecting part, the driving part is rotatably connected to the connecting part.

[0033] In some embodiments, the handle part further comprises a cooperating part, the cooperating part is connected to the first elastic part, when the handle body is rotated in the first direction, the cooperating part is driven to rotate in the first direction, and the cooperating part drives the first elastic part to elastically deform.

[0034] In some embodiments, a second elastic part is further arranged between the handle body and the cooperating part, and the trigger mechanism further comprises a limiting part, when the handle body is rotated in the second direction, the cooperating part is blocked by the limiting part and cannot rotate, and the handle body drives the second elastic part to elastically deform.

[0035] The second aspect of the present application provides a firing assembly, comprising a power mechanism, an actuating mechanism, a controller, and the trigger mechanism of the first aspect; the controller is configured to send a first start signal to the power mechanism when a signal that the first switch is triggered is received, and to send a second start signal to the power mechanism when a signal that the second switch is triggered is received; the power mechanism is configured to drive the actuating mechanism to move in a distal direction when the first start signal is received, and to drive the actuating mechanism to move in a proximal direction when the second start signal is received.

[0036] The third aspect of the present application provides an electric anastomat, comprising the trigger mechanism of the first aspect or the firing assembly of the second aspect.

[0037] The trigger mechanism, the firing assembly, and the electric anastomat provided by the present application have the following advantages:

[0038] The present application provides a trigger mechanism for starting an anastomat to perform a surgical operation, different switches are triggered by the trigger part through different directional movements of the handle part, and the closing, firing, and back-off actions of the electric anastomat are respectively realized, the use of the handle part of the electric anastomat is more in line with the operation habits of doctors, and misoperation is less likely to occur, thereby improving the safety and convenience of surgery. BRIEF DESCRIPTION OF DRAWINGS

[0039] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings.

[0040] Fig. 1 is a first side view of a partial structure of a device platform of an electric anastomat according to a first embodiment of the present application;

[0041] Fig. 2 is a second side view of a partial structure of a device platform of an electric anastomat according to the first embodiment of the present application;

[0042] Fig. 3 is a first side view of a firing assembly according to the first embodiment of the present application;

[0043] Fig. 4 is a view of a cooperation between a firing safety and a firing safety switch according to the first embodiment of the present application;

[0044] Fig. 5 is a view of a cooperation between a first trigger and a first switch according to the first embodiment of the present application;

[0045] Fig. 6 is a view of a structure of a second trigger according to the first embodiment of the present application;

[0046] Fig. 7 is a view of a cooperation between a trigger and a switch according to the first embodiment of the present application;

[0047] Fig. 8 is a partial perspective view of a trigger mechanism according to the first embodiment of the present application;

[0048] Fig. 9 is a view of a structure of a handle member according to the first embodiment of the present application;

[0049] Fig. 10 is a view of a cooperation between a handle and a cooperating member according to the first embodiment of the present application;

[0050] Fig. 11 is a view of a cooperation between a handle and a torsion spring according to the first embodiment of the present application;

[0051] Fig. 12 is a view of a movement of a handle member from an initial state to a first state according to the first embodiment of the present application;

[0052] Fig. 13 is a view of a movement of a handle member from an initial state to a second state according to the first embodiment of the present application;

[0053] Fig. 14 is a first side view of a trigger mechanism when a handle member is in an initial state according to the first embodiment of the present application;

[0054] Fig. 15 is a first side view of a trigger mechanism when a handle member is in a first state according to the first embodiment of the present application;

[0055] Fig. 16 is a second side view of a trigger mechanism when a handle member is in an initial state according to the first embodiment of the present application;

[0056] Figure 17 is a schematic diagram of the second side of the triggering mechanism when the handle component of the first embodiment of this application is in the second state;

[0057] Figure 18 is a schematic diagram of the first side structure of the firing assembly according to the second embodiment of this application;

[0058] Figure 19 is a schematic diagram of the second side structure of the firing assembly according to the second embodiment of this application;

[0059] Figure 20 is a schematic diagram of the partial structure of the triggering mechanism of the second embodiment of this application and its cooperation with the frame;

[0060] Figure 21 is a schematic diagram of the handle component of the second embodiment of this application in its initial state, in cooperation with the trigger and the switch;

[0061] Figure 22 is a schematic diagram of the handle component and the torsion spring in the second embodiment of this application;

[0062] Figure 23 is a structural schematic diagram of the handle component according to the second embodiment of this application;

[0063] Figure 24 is a schematic diagram of the handle component of the second embodiment of this application being pressed in conjunction with the trigger and the switch;

[0064] Figure 25 is a schematic diagram of the handle component of the second embodiment of this application being raised and cooperating with the trigger and the switch;

[0065] Figure 26 is a partial structural schematic diagram of the instrument platform of the stapler according to the third embodiment of this application;

[0066] Figure 27 is a first side view of the firing assembly according to the third embodiment of this application;

[0067] Figure 28 is a second side view of the firing assembly according to the third embodiment of this application;

[0068] Figure 29 is a schematic diagram of the trigger component when the handle body is in the initial position according to the third embodiment of this application;

[0069] Figure 30 is a schematic diagram of the structure of the trigger element according to the third embodiment of this application;

[0070] Figure 31 is a schematic diagram of the handle component and the torsion spring in cooperation with the third embodiment of this application;

[0071] Figure 32 is a schematic diagram of the partial structure of the handle body and the mating parts of the third embodiment of this application;

[0072] Figure 33 is a structural schematic diagram of the handle component according to the third embodiment of this application;

[0073] Figure 34 is a schematic diagram of the trigger component when the handle body is in the first position according to the third embodiment of this application;

[0074] Fig. 35 is a structural schematic view of the trigger assembly when the handle body of the third embodiment of the present application is in the second position.

[0075] Reference signs:

[0076] First embodiment: 110 - rack; 120 - connecting rod; 200 - power mechanism; 210 - motor; 220 - gear set; 2210 - first gear; 2220 - second gear; 300 - actuating member; 310 - tooth surface; 400 - circuit board; 510 - firing safety member; 5110 - rod portion; 5120 - third trigger portion; 520 - firing safety switch; 5210 - third trigger position; 51 - first switch; 511 - first trigger position; 52 - second switch; 521 - second trigger position; 7 - handle component; 71 - handle; 711 - second driving portion; 712 - first engaging portion; 713 - first through hole; 714 - first mounting portion; 715 - gripping portion; 72 - engaging member; 721 - first driving portion; 722 - second engaging portion; 723 - second through hole; 724 - second mounting portion; 73 - torsional spring; 74 - return spring; 75 - limiting member; 76 - rotating shaft; 77 - spring fixing member; 81 - first trigger member; 811 - first pivoting portion; 812 - third driving portion; 813 - first limiting portion; 814 - first trigger portion; 815 - first guide portion; 82 - second trigger member; 821 - second pivoting portion; 822 - fourth driving portion; 823 - second limiting portion; 824 - second trigger portion; 825 - second guide portion.

[0077] Second embodiment: 110 - rack; 210 - motor; 220 - gear set; 2210 - first gear; 2220 - second gear; 300 - actuating member; 400 - circuit board; 510 - firing safety member; 520 - firing safety switch; 204 - handle component; 2041 - handle body; 2411 - first driving portion; 2412 - second driving portion; 2413 - first linkage portion; 2414 - pivoting portion; 2415 - hand holding portion; 2042 - engaging member; 2421 - second linkage portion; 2422 - spring fixing portion; 2423 - stop groove; 2043 - rotating shaft; 2051 - torsional spring; 2052 - return spring; 2061 - first trigger member; 2611 - third driving portion; 2612 - first connecting portion; 2613 - first trigger portion; 2614 - first limiting portion; 2062 - second trigger member; 2621 - fourth driving portion; 2622 - second connecting portion; 2623 - second trigger portion; 2624 - second limiting portion; 2071 - first switch; 2711 - first contact; 2072 - second switch; 2721 - second contact; 2093 - limiting member; 2094 - spring fixing member;

[0078] Third embodiment: 110-Frame; 210-Motor; 220-Gear set; 300-Actuator; 400-Circuit board; 510-Fuse safety; 301-Handle assembly; 3011-Handle body; 3111-Grip part; 3112-Pivot part; 3113-Drive part; 3114-First linkage part; 3012-Matching part; 3121-Second linkage part; 3122-Spring fixing part; 3123-Matching groove; 3013-Rotating shaft; 3021-First switch; 3211-First contact; 322-Second switch; 3221-Second contact; 303-Trigger; 3030-Trigger body; 331-First trigger part; 3311-First guide surface; 332-Second trigger part; 3321-Second guide surface; 3033-Connecting part; 304 - Limiting component; 3051 - Return spring; 3052 - Torsion spring. Detailed Implementation

[0079] The exemplary embodiments will now be described more fully. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The words “or” and “or” in the specification may mean “and” or “or”. Although the terms “upper,” “lower,” “between,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although “first” or “second,” etc., are used in this specification to denote certain features, they are only for indication of function and not as a limitation on the number or importance of specific features.

[0080] This application provides a triggering mechanism, a firing assembly, and an electric stapler. The triggering mechanism includes: a first switch and a second switch; a handle component and a triggering component, the handle component including a drive unit.

[0081] When the handle component is driven to move in the first direction, the drive unit triggers the first switch via the triggering component. The first switch is configured to, when triggered, activate the actuation mechanism of the electric stapler to move distally, thereby completing the closing and firing actions of the electric stapler. When the handle component is driven to move in the second direction, the drive unit triggers the second switch via the triggering component. The second switch is configured to, when triggered, activate the actuation mechanism of the electric stapler to move proximally, thereby completing the retraction action of the electric stapler.

[0082] Therefore, in the present application, different switch is triggered by the different direction movement of the handle component to realize the closing, firing and back-off actions of the electric anastomat, respectively, the use of the handle component is more in line with the operation habit of the doctor, and no matter the doctor holds the handle component with the right hand or the left hand, the two operation modes of the handle component are not easy to cause confusion, thus misoperation is not easy to occur, and the operation safety and use convenience are improved.

[0083] The firing assembly provided in the present application comprises a power mechanism, an actuating mechanism, a controller and a trigger mechanism. The controller is configured to send a first start signal to the power mechanism when receiving a signal that the first switch is triggered, and send a second start signal to the power mechanism when receiving a signal that the second switch is triggered. The power mechanism is configured to drive the actuating mechanism to move in the distal direction when receiving the first start signal, and drive the actuating mechanism to move in the proximal direction when receiving the second start signal. The electric anastomat provided in the present application comprises an instrument platform and a cartridge assembly connected to the distal end of the instrument platform. The instrument platform comprises a housing and a firing assembly at least partially located inside the housing.

[0084] The structure of the trigger mechanism of each specific embodiment of the present application will be described in detail below with reference to the drawings. It can be understood that each specific embodiment is not a limitation on the protection scope of the present application. The same reference numerals in the drawings represent the same or similar structures, and thus repeated description thereof will be omitted. In the present application, the distal end and the proximal end are relative to the operator, the end closer to the operator is the proximal end, the end farther away from the operator, i.e. the end closer to the surgical position is the distal end, and the direction along the axis of the anastomat is the axial direction, i.e. the direction from the distal end to the proximal end of the anastomat, or the direction from the proximal end to the distal end of the anastomat. For example, in the view angle of FIGS. 1 and 2, the direction of S1 is the direction from the proximal end to the distal end of the anastomat. The transverse direction refers to the width direction of the anastomat, i.e. the direction perpendicular to the paper in FIGS. 1 and 2, i.e. the direction of S2 in FIG. 8. The longitudinal direction refers to the height direction of the anastomat, i.e. the up-down direction in FIGS. 1 and 2. The axis refers to the axis of the long axis-shaped part of the cartridge assembly and the instrument platform of the electric anastomat, for example, the axis of the connecting rod 120 in FIG. 1.

[0085] Figures 1-17 show the structure of the trigger mechanism of the first embodiment of the present application. Figures 1 and 2 show the partial side schematic view of the instrument platform of the first embodiment of the electric anastomat. The instrument platform of the electric anastomat comprises a housing (not shown in the figures), a frame 110, a firing assembly and a connecting rod 120, the distal end of the connecting rod 120 is connected to a cartridge assembly (not shown in the figures), the firing assembly and the frame 110 are at least partially located inside the housing. The firing assembly comprises a power mechanism 200, an actuating mechanism, a controller and a trigger mechanism. The trigger mechanism comprises a first switch 51, a second switch 52, a handle part 7 and a trigger part. In this embodiment, the trigger part comprises a first trigger 81 and a second trigger 82. The handle part 7 is rotatably mounted on the housing of the electric anastomat, so that at least part of the handle part 7 can rotate relative to the housing.

[0086] The power mechanism 200 comprises a motor 210 and a gear set 220, the gear set 220 comprises a first gear 2210 connected to the output shaft of the motor 210 and a second gear 2220 engaged with the first gear 2210. The actuating mechanism comprises an actuating member 300, the actuating member 300 extends along the axial direction of the anastomat, and the actuating member 300 comprises a toothed surface 310 engaged with the second gear 2220. The second gear 31 is engaged with the toothed surface 310 to transmit the torque of the motor 210 to the actuating member 300 through the gear set 220. The controller is arranged on a circuit board 400, the first switch 51 and the second switch 52 are respectively connected to the circuit board 400, and are electrically connected with the controller through the wiring of the circuit board 400.

[0087] The handle part 7 can be driven to rotate at least partially in a first direction and in a second direction. The first direction is opposite to the second direction. In this embodiment, the first direction is the clockwise direction in Figure 3, i.e. the direction towards the motor 210, and the second direction is the counterclockwise direction in Figure 3, i.e. the direction away from the motor 210. The handle part 7 comprises a driving part, the driving part comprises a first driving part 721 and a second driving part 711. When the doctor holds the electric anastomat and presses the handle part 7, the handle part 7 is driven to rotate at least partially in the first direction, the first driving part 721 moves in the first direction accordingly, drives the first trigger 81 to move so that the first trigger 81 triggers the first switch 51, the first switch 51 is configured to send a first trigger signal to the controller when triggered, the controller sends a first start signal to the motor 210 of the power mechanism 200 when receiving the first trigger signal, the motor 210 starts positive rotation when receiving the first start signal, drives the actuating member 300 to move in the distal direction, the actuating mechanism first drives the jaw of the cartridge assembly to close, and then drives the anastomat staples in the cartridge assembly to suture the tissue, so that the closing and firing actions of the electric anastomat can be completed.

[0088] When the surgeon holds the electric anastomat and lifts the handle part 7 upward after the firing of the anastomat is completed, the handle part 7 is driven to rotate at least partially in the second direction, the second driving part 711 moves in the second direction, the second trigger 82 is driven to move and trigger the second switch 52, the second switch 52 sends a second trigger signal to the controller, the controller sends a second start signal to the motor 210 of the power mechanism 200 when the second trigger signal is received, the motor 210 starts to reverse when the second start signal is received, drives the actuating part 300 to move in the proximal direction, so that the retreat action of the electric anastomat can be completed, and the opening of the jaw of the anastomat assembly is driven by the actuating mechanism.

[0089] Therefore, in the present application, different triggers are driven by different direction movements of the handle part 7, and different switches are triggered, so as to realize the closing, firing and retreat actions of the electric anastomat respectively. The use of the handle part 7 is more in line with the operation habit of the surgeon, and the use convenience is improved. Since the operation modes of the first direction movement and the second direction movement of the handle part 7 are quite different, for the surgeon, no matter whether the instrument is held with the right hand or the left hand, the operation mode of the handle part 7 is unchanged, and the operations of pressing the handle part 7 and lifting the handle part 7 are not easy to be confused, so that the misoperation is not easy to be caused, and the safety of the operation is improved.

[0090] The movement position of the actuating member 300 includes an initial position when not driven, a closed position when moved to the distal end direction until the staple cartridge assembly jaw closure is completed, and a firing completion position when the anastomat firing is completed. As shown in FIGS. 3 and 4, the trigger mechanism further comprises a firing safety member 510 and a firing safety switch 520, the firing safety switch 520 is configured to be not triggered and the actuating member 300 is in the closed position, the actuating member 300 is prohibited to be started to move to the distal end direction, and the firing safety member 510 is configured to be actuated to trigger the firing safety switch 520. In this embodiment, the firing safety member 510 comprises a rod portion 5110, the rod portion 5110 extends in the transverse direction, and the first end and the second end of the rod portion 5110 at least partially pass through the two sides of the shell, respectively, to facilitate the doctor to press and operate. The rod portion 5110 can be pressed to move in the axial direction. The first end and the second end of the rod portion 5110 are provided with two third trigger portions 5120, and a cavity is arranged between the two third trigger portions 5120. In the initial state, the third trigger position 5210 of the firing safety switch 520 is located inside the cavity between the two third trigger portions 5120, and the firing safety switch 520 is not triggered. In this state, under the control of the controller, when the actuating member 300 is in the closed position, even if the doctor presses the handle part 7 so that the first switch 51 is triggered, the controller receives the first trigger signal, and the controller does not send the first start signal to the motor 210, the motor 210 cannot drive the actuating member 300 to perform the anastomat firing, which avoids the misoperation of the doctor when the doctor does not prepare for the operation, and further improves the safety of the operation. After the doctor prepares for the operation, one end of the rod portion 5110 of the firing safety member 510 is pressed down, so that the rod portion 5110 moves in the transverse direction, one of the third trigger portions 5120 contacts the third trigger position 5210 of the firing safety switch 520 and triggers the firing safety switch 520, the firing safety switch 520 sends the third trigger signal to the controller, and the controller receives the third trigger signal before considering that the firing safety is released. At this time, the doctor presses the handle part 7 again, the controller receives the first trigger signal sent by the first switch 51, and then sends the first start signal to the motor 210.

[0091] As shown in FIGS. 5-9, the first switch 51 and the second switch 52 are respectively located on the lateral sides of the shaft center of the electric anastomat. The first switch 51 and the first driving part 721 are respectively located on the longitudinal sides of the first trigger 81, for example, the first switch 51 is at least partially located on the upper side of the first trigger 81, and the first driving part 721 is at least partially located on the lower side of the first trigger 81. The second switch 52 and the second driving part 711 are respectively located on the longitudinal sides of the second trigger 82, for example, the second switch 52 is at least partially located on the upper side of the second trigger 82, and the second driving part 711 is at least partially located on the lower side of the second trigger 82. Therefore, the position relationship of the components of the trigger mechanism is reasonably arranged in this embodiment, the first switch 51 and the second switch 52 are respectively arranged on the lateral sides of the shaft center, and the switches, the corresponding triggers and the corresponding driving parts are arranged in the longitudinal direction, the layout of the trigger mechanism is reasonably arranged, the space volume occupied by the trigger mechanism is reduced, which is conducive to the miniaturization and light weight of the instrument platform of the electric anastomat. Alternatively, the first switch 51 and the second switch 52 are aligned in the lateral direction, which improves the symmetry and stability of the overall structure, and further helps to reduce the overall volume of the instrument platform. However, the present application is not limited thereto, the first switch 51 and the second switch 52 can also be arranged in front of and behind each other in the axial direction, and / or the first switch 51 and the second switch 52 can also be arranged at different heights, which also belongs to the protection scope of the present application.

[0092] The first trigger member 81 comprises a first pivot portion 811, a third driving portion 812 and a first trigger portion 814. The third driving portion 812 is arranged on the first side of the first pivot portion 811, and the first trigger portion 814 is arranged on the second side of the first pivot portion 811. The second trigger member 82 comprises a second pivot portion 821, a fourth driving portion 822 and a second trigger portion 824. The fourth driving portion 822 is arranged on the first side of the second pivot portion 821, and the second trigger portion 824 is arranged on the second side of the second pivot portion 821. The first pivot portion 811 and the second pivot portion 821 are respectively rotatably mounted on the lateral sides of the frame 110 of the electric anastomat, so that the first trigger member 81 can rotate around the first pivot portion 811 when driven by the first driving portion 721, thereby changing the position of the first trigger portion 814, and the second trigger member 82 can rotate around the second pivot portion 821 when driven by the second driving portion 711, thereby changing the position of the second trigger portion 824. The first pivot portion 811 and the second pivot portion 821 are arranged in the lateral direction. Alternatively, the first pivot portion 811 and the second pivot portion 821 are aligned in the lateral direction. The first pivot portion 811 and the second pivot portion 821 can be mounted on the housing of the anastomat by a common long pivot shaft, or can be mounted on the housing of the anastomat by two short pivot shafts. Such a structure is conducive to improving the symmetry and stability of the overall structure, and further conducive to reducing the overall volume of the instrument platform. However, the present application is not limited thereto, and the first pivot portion 811 and the second pivot portion 821 can also be arranged in front of and behind each other in the axial direction, and / or the first pivot portion 811 and the second pivot portion 821 can also be arranged at different heights, which also belong to the protection scope of the present application.

[0093] The third driving portion 812 is arranged on the path of movement of the first driving portion 721 in the first direction, and the first trigger position 511 of the first switch 51 is located on the movement path of the first trigger portion 814 in the second direction. The third driving portion 812 is configured to be driven and moved by the first driving portion 721 to rotate the entire first trigger member 81, so that the first trigger portion 814 moves in the second direction to trigger the first switch 51. The fourth driving portion 822 is arranged on the path of movement of the second driving portion 711 in the second direction, and the second trigger position 521 of the second switch 52 is located on the movement path of the second trigger portion 824 in the first direction. The fourth driving portion 822 is configured to be driven and moved by the second driving portion 711 to rotate the entire second trigger member 82, so that the second trigger portion 824 moves in the first direction to trigger the second switch 52.

[0094] As shown in FIG. 7, the second side of the first trigger 81 is further provided with a first limiting portion 813, which is at least partially located between the first switch 51 and the chassis 110 (shown in FIG. 1) to further limit the position of the first trigger 81 and avoid undesired lateral movement of the first trigger 81. The second side of the second trigger 82 is further provided with a second limiting portion 823, which is at least partially located between the second switch 52 and the chassis 110 (shown in FIG. 2) to further limit the position of the second trigger 82 and avoid undesired lateral movement of the second trigger 82. With the first limiting portion 813 and the second limiting portion 823, the overall structural stability of the instrument platform can be further improved. Further, the first limiting portion 813 and the contact surface of the first switch 51 and the first limiting portion 813 and the contact surface of the chassis 110 can have certain frictional force to keep the first trigger 81 in its initial position. When the handle part 7 is not operated by the doctor, even if the instrument platform vibrates, the first trigger 81 is not easy to rotate, and the stapler is also avoided from being misfired. The second limiting portion 823 and the contact surface of the second switch 52 and the contact surface of the chassis 110 can also have certain frictional force to keep the second trigger 82 in its initial position. When the handle part 7 is not operated by the doctor, even if the instrument platform vibrates, the second trigger 82 is not easy to rotate, and the stapler is also avoided from being misfired. The first side of the first trigger 81 is further provided with a first guide portion 815, which is, for example, a protruding column structure, and the second side of the second trigger 82 is further provided with a second guide portion 825, which is, for example, a protruding column structure. An arc-shaped first guide groove and an arc-shaped second guide groove can also be provided on the housing or the chassis of the stapler. When the first trigger 81 is in the initial position, the first guide portion 815 is located at the first end of the first guide groove, and when the first trigger 81 rotates in the second direction, the first guide portion 815 moves in the first guide groove along the arc-shaped extension direction, thereby providing a guide action for the rotational movement of the first trigger 81. When the second trigger 82 is in the initial position, the second guide portion 825 is located at the first end of the second guide groove, and when the second trigger 82 rotates in the first direction, the second guide portion 825 moves in the second guide groove along the arc-shaped extension direction, thereby providing a guide action for the rotational movement of the second trigger 82.

[0095] As shown in FIGS. 8-11, the handle member 7 includes a coupling piece 72 and a handle 71. The coupling piece 72 includes a first driving portion 721, a second coupling portion 722, a second through hole 723, and a second mounting portion 724. The handle 71 includes a second driving portion 711, a first coupling portion 712, a first through hole 713, a first mounting portion 714, and a gripping portion 715 for a doctor to hold and operate. A rotating shaft 76 is disposed in the first through hole 713, and the handle 71 is rotatably connected to the housing of the instrument platform via the rotating shaft 76. The first mounting portion 714 is sleeved on the outside of the rotating shaft 76, and the first mounting portion 714 is disposed in the second through hole 723, so that the coupling piece 72 and the handle 71 are pivotally connected to each other. In this embodiment, the handle member 7 further includes a first biasing member configured to apply a biasing force to the coupling piece 72 to move the coupling piece 72 in the second direction. Therefore, after the handle 71 is driven to move in the first direction by the doctor, the doctor releases the handle 71, and the handle 71 is driven to move in the second direction to reset under the biasing force of the first biasing member. In this embodiment, as shown in FIG. 1, the first biasing member is a reset spring 74, one end of the reset spring 74 is fixed to the second mounting portion 724, and the other end of the reset spring 74 is fixed to the housing of the anastomat via a spring fixing member 77.

[0096] As shown in FIGS. 9-11, the handle member 7 further includes a limiting member 75 and a second biasing member configured to apply a biasing force to the handle 71 to move the handle 71 in the first direction relative to the coupling piece 72. The limiting member 75 is disposed below the initial position of the coupling piece 72. The limiting member 75 is, for example, a limiting pin shaft or a limiting protrusion fixed to the housing of the anastomat. The limiting member 75 is configured to block the coupling piece 72 from moving in the second direction from the initial position. The second biasing member is installed between the coupling piece 72 and the handle 71 to provide biasing forces to the coupling piece 72 and the handle 71 to keep them in the initial coupling state. The second biasing member is a torsion spring 73, the torsion spring 73 is sleeved on the outside of the first mounting portion 714, and two legs of the torsion spring 73 abut against the handle 71.

[0097] Fig. 12 and Fig. 13 show the structure of the three states of the handle part 7. Here the state of the handle part 7 when it is not operated by the doctor is defined as the initial state, at this time the handle 71 is located at its initial position 71a, and the fitting part 72 is located at its initial position 72a. As shown in Fig. 12, when the doctor holds the handle 71 and rotates the handle 71 along the first direction (R1 direction in Fig. 12), the handle 71 moves to the first position 71b, and at the same time the first fitting part 712 drives the second fitting part 722 to rotate along the first direction, so that the fitting part 72 moves to the second position 72b, the second installation part 724 cooperates with the reset spring 74, so that the reset spring 74 is stretched and elastically deformed, and the handle part 7 enters the first state. At this time, the doctor releases the handle part 7, under the biasing force of the reset spring 74, the fitting part 72 moves along the second direction and returns to its initial position 72a, the first fitting part 712 drives the second fitting part 722 to rotate along the second direction, so that the handle 71 moves along the second direction and returns to its initial position 71a, and the handle part 7 returns to the initial state.

[0098] As shown in Fig. 13, when the doctor lifts the handle 71 upward and rotates the handle 71 along the second direction (R2 direction in Fig. 13), the handle 71 moves along the second direction to the second position 71c, and at this time the fitting part 72 remains at its initial position 72a without movement under the stop action of the limiting part 75, the handle 71 compresses the torsion spring 73 and is torsionally deformed, and the handle part 7 enters the second state. At this time, the doctor releases the handle part 7, under the biasing force of the torsion spring 73, the handle 71 moves along the first direction relative to the fitting part 72 and returns to its initial position 71a, and the handle part 7 returns to the initial state.

[0099] The working principle of the trigger mechanism will be described in detail below with reference to Fig. 14-17.

[0100] As shown in FIG. 14, when the handle member 71 is in the initial state, the handle member 71 and the engaging member 72 are both in the initial position, and the first driving portion 721 of the engaging member 72 does not act on the third driving portion 812 of the first trigger member 81. The first trigger portion 814 does not act on the first trigger position 511 of the first switch 51. When a doctor holds the holding portion 715 of the handle member 71 and drives the handle member 71 to move in the first direction R1, the handle member 71 rotates around the rotating shaft 76 in the first direction. As shown in FIG. 15, the engaging member 72 rotates with the handle member 71 in the first direction, and the reset spring is stretched and elastically deformed, so that the handle member 71 enters the first state. The first driving portion 721 drives the third driving portion 812, so that the first trigger member 81 rotates around the first pivot portion 811. The rotating direction of the first trigger member 81 is opposite to the rotating direction of the first driving portion 721, i.e., the first trigger member 81 rotates in the second direction. The first trigger portion 814 contacts the first trigger position 511 and triggers the first switch 51. The first switch 51 sends a first trigger signal to the controller, and the controller sends a first starting signal to the motor 210. The motor 210 starts to rotate in the positive direction and drives the actuating member 300 to move in the distal direction through the gear set 220, so that the cartridge assembly is driven to complete the closing. After the cartridge assembly completes the closing, under the action of the firing safety switch 520, even if the doctor holds the handle member 71 again to make the first trigger member 81 trigger the first switch 51, the controller will not send the first starting signal to the motor 210. After the doctor makes the firing preparation, the doctor presses the firing safety member 510 to trigger the firing safety switch 53, and the firing safety switch 520 sends a third trigger signal to the controller. At this time, the doctor drives the handle member 71 to move in the first direction again, drives the first trigger member 81 to rotate through the engaging member 72, and triggers the first switch 51. The first switch 51 sends a first trigger signal to the controller, and the controller sends a first starting signal to the motor 210. The motor 210 starts to rotate in the positive direction and drives the actuating member 300 to move in the distal direction through the gear set 220, so that the cartridge assembly is driven to complete the firing. The doctor releases the handle member 71, and under the elastic restoring force of the reset spring, the engaging member 72 and the handle member 71 return to the initial position.

[0101] As shown in FIG. 16, after the anastomat is fired, the handle part 7 is in the initial state, the second driving part 711 of the handle 71 does not act on the fourth driving part 822 of the second trigger 82, and the second trigger part 824 of the second trigger 82 does not act on the second trigger position 521 of the second switch 52. At this time, the doctor lifts the handle 71 upward, so that the handle 71 rotates in the second direction R2. As shown in FIG. 17, under the action of the limiting part 75, the fitting part 72 remains in its initial position and does not move, and the torsion spring is compressed and deformed by the handle 71, so that the handle part 7 enters the second state. The second driving part 711 drives the fourth driving part 822, so that the second trigger 82 rotates about the second pivot part 821, and the rotation direction of the second trigger 82 is opposite to that of the second driving part 711, that is, the second trigger 82 rotates in the first direction. The second trigger part 824 triggers the second trigger position 521 of the second switch 52, and the second switch 52 sends a second trigger signal to the controller, and the controller sends a second start signal to the motor 210, and the motor 210 starts to drive the reverse driving actuating part 300 to retreat in the proximal direction, thereby driving the jaw of the cartridge assembly to open. At this time, the doctor releases the handle 71, and under the biasing force of the torsion spring, the handle 71 moves relative to the fitting part 72 in the first direction and returns to its initial position.

[0102] The above embodiments take the first biasing part as a return spring and the second biasing part as a torsion spring as an example for description, but the present application is not limited thereto. The first biasing part and the second biasing part can also be selected as other types of elastic parts according to needs. For example, the first biasing part is a compression spring, a torsion spring, a spring sheet, etc., and the second biasing part is a compression spring, a tension spring, a spring sheet, etc., all of which are within the protection scope of the present application. The first switch, the second switch, and the firing safety switch in the above embodiments can be implemented by micro switches, but the present application is not limited thereto, and other types of switches that can be triggered by corresponding trigger parts and send signals to the controller can also be used. The first switch and the second switch can be two independent switch devices, or the first switch and the second switch can also be implemented by using the same switch device, which is provided with two trigger positions, one trigger position sends a first trigger signal to the controller when triggered, and the part of the switch device corresponding to the trigger position serves as the first switch, and the other trigger position sends a second trigger signal to the controller when triggered, and the part of the switch device corresponding to the trigger position serves as the second switch.

[0103] The first embodiment of the present application provides a trigger mechanism for starting the anastomat to perform surgical operations. Different trigger parts are driven by different direction movements of the handle part 7, and different switches are triggered, so as to respectively realize the closing, firing, and retreat actions of the electric anastomat. The use of the handle part of the electric anastomat is more in line with the operation habits of doctors, and is not easy to cause misoperation, thereby improving the safety and convenience of the operation.

[0104] Fig. 18-25 show the structure of the trigger mechanism of the second embodiment of the present application. In this embodiment, the electric anastomat comprises an instrument platform and a cartridge assembly mounted on the distal end of the instrument platform. The instrument platform comprises a housing, a chassis 110 (shown in Fig. 20) and a firing assembly. Figs. 18 and 19 show the structure of the firing assembly of the second embodiment. The firing assembly comprises an actuating member 300, a gear set 220, a circuit board 400, a motor 210 and a trigger mechanism. The actuating member 300 extends along the axial direction of the anastomat, and one side surface of the actuating member 300 is provided with a tooth surface. The gear set 220 comprises a first gear 2210 connected with the output shaft of the motor 210 and a second gear 2220 cooperating with the tooth surface of the actuating member 300. The circuit board 400 is provided with a controller (not shown in the figures) for controlling the start-stop and working direction of the motor 210.

[0105] In this embodiment, in the perspective of Fig. 18, the left-right direction is the axial direction of the anastomat, and the direction from right to left is the direction towards the distal end. In the perspective of Fig. 19, the direction from left to right is the direction towards the distal end. The up-down direction in Figs. 18 and 19 is the longitudinal direction, i.e. the height direction. The W direction in Fig. 20 is the transverse direction, i.e. the width direction.

[0106] Fig. 20 shows the structure of the partial structure of the trigger mechanism cooperating with the chassis 110. As shown in Figs. 18-20, the trigger mechanism comprises a first switch 2071, a second switch 2072, a trigger component and a handle component 204, the trigger component comprising a first trigger 2061 and a second trigger 2062. The first switch 2071 and the second switch 2072 are electrically connected with the circuit board 400. The first switch 2071 and the second switch 2072 can be realized by two switch devices, or the first switch 2071 and the second switch 2072 are two control components in the same switch device. The second switch 2072 is arranged along the axial direction of the anastomat with the first switch 2071, and both the first switch 2071 and the second switch 2072 are arranged on the first side of the chassis 110. The second trigger 2062 is arranged along the axial direction with the first trigger 2061, and both the first trigger 2061 and the second trigger 2062 are arranged on the first side of the chassis 110. The handle component 204 comprises a handle body 2041, which is rotatably connected with the housing of the anastomat through a pivot portion 2414. The handle component 204 comprises a driving portion, which comprises a first driving portion 2411 and a second driving portion 2412. The side of the handle body 2041 facing the first trigger 2061 is provided with the first driving portion 2411, the side of the handle body 2041 facing the second trigger 2062 is provided with the second driving portion 2412, and the side of the handle body 2041 away from the first trigger 2061 and the second trigger 2062 comprises a hand holding portion 2415 for the doctor to hold and operate.

[0107] Fig. 21 is a schematic view of the handle component 204 in the initial state cooperating with the trigger and the switch according to an embodiment of the present application. As shown in Figs. 18-21, the first switch 2071 is arranged at the distal side of the second switch 2072, and the first trigger 2061 is arranged at the distal side of the second trigger 2062. The first switch 2071 and the second switch 2072 are axially aligned, i.e., at the same height position. The first trigger 2061 and the second trigger 2062 are axially aligned, i.e., at the same height position. The first switch 2071, the first trigger 2061 and the handle body 2041 are arranged in sequence in the longitudinal direction, and the second switch 2072, the second trigger 2062 and the handle body 2041 are arranged in sequence in the longitudinal direction. The first trigger 2061 comprises a first connecting portion 2612, a first trigger portion 2613 and a third driving portion 2611. The first connecting portion 2612 is rotatably connected to the frame 110, and the first trigger portion 2613 and the third driving portion 2611 are arranged at two sides of the first connecting portion 2612, respectively. The first trigger portion 2613 is arranged at the side of the first trigger 2061 close to the first switch 2071, and the third driving portion 2611 is arranged at the side of the first trigger 2061 close to the first driving portion 2411. The second trigger 2062 comprises a second connecting portion 2622, a second trigger portion 2623 and a third driving portion 2611. The second connecting portion 2622 is rotatably connected to the frame 110, and the second trigger portion 2623 and the third driving portion 2611 are arranged at two sides of the second connecting portion 2622, respectively. The second trigger portion 2623 is arranged at the side of the second trigger 2062 close to the second switch 2072, and the third driving portion 2611 is arranged at the side of the second trigger 2062 close to the second driving portion 2412. The first driving portion 2411 is at least partially located between the third driving portion 2611 and the fourth driving portion 2621, and the second driving portion 2412 is at least partially located between the third driving portion 2611 and the fourth driving portion 2621, so that the longitudinal space can be fully utilized, and the longitudinal occupied space of the trigger mechanism as a whole can be reduced. Therefore, the trigger mechanism is reasonably arranged in structure and position, and the space inside the housing is fully utilized, which is conducive to realizing the miniaturization of the electric anastomat.

[0108] As shown in Fig. 20, the first trigger 2061 further comprises a first limiting portion 2614, which is at least partially located between the first switch 2071 and the frame 110, and is used for limiting the transverse position of the first trigger 2061, so as to improve the structural stability of the trigger mechanism. The second trigger 2062 further comprises a second limiting portion 2624, which is at least partially located between the second switch 2072 and the frame 110, and is used for limiting the transverse position of the second trigger 2062, so as to improve the structural stability of the trigger mechanism.

[0109] As shown in FIG. 21, when the handle part 204 is in the initial state, the first driving part 2411 does not act on the first trigger piece 2061, the first trigger piece 2061 is in its initial position, the first trigger part 2613 does not contact the first contact 2711 of the first switch 2071, the second driving part 2412 does not act on the second trigger piece 2062, the second trigger piece 2062 is in its initial position, the second trigger part 2623 does not contact the second contact 2721 of the second switch 2072. At this time, the motor 210 does not start to work, the actuating part 300 is in its initial position, and the cartridge assembly is in the state that the jaws are open.

[0110] The first direction and the second direction are opposite directions. In the view angle of FIG. 21, the first direction is counterclockwise, and the second direction is clockwise. When the doctor holds and presses the handle body 41, the first driving part 2411 is driven to move in the first direction, and the first switch 2071 is triggered by the first trigger piece 2061, so that the first switch 2071 triggers the actuating part 300 to move in the distal direction, so that the closing and firing actions of the stapler can be realized. When the doctor holds and lifts the handle body 2041, the second driving part 2412 is driven to move in the second direction, and the second switch 2072 is triggered by the second trigger piece 2062, so that the second switch 2072 triggers the actuating part 300 to move in the proximal direction.

[0111] Therefore, by adopting the trigger mechanism, by driving the handle body 2041 to move in different directions, different switches can be triggered by different trigger pieces, and then the actuating part 300 of the electric stapler is triggered to move in the distal direction or in the proximal direction, so that the handle part 204 can be used to drive the electric stapler to perform closing, firing and back-off operations. The way of driving the handle part 204 is more in line with the operation habit of doctors, and is more convenient to use. The trigger mechanism has a simple structure and high structural stability. Whether the doctor operates the stapler with the right hand or the left hand, the operation mode of the handle part 204 is unchanged, and the operations of pressing the handle part 204 and lifting the handle part 204 are not easy to be confused, so as not to cause misoperation. Therefore, the use reliability and safety of the trigger structure are improved.

[0112] As shown in FIGS. 18 and 19, the trigger mechanism further comprises a firing lock switch 520 and a firing lock 510. When the actuating member 300 is moved from its initial position to the closed position in the distal direction, the staple cartridge assembly is closed, at this time, if the firing lock switch 520 is not triggered, even if the physician presses the handle body 2041, the first switch 2071 is triggered by the first trigger member 2061, the actuating member 300 cannot continue to move in the distal direction for firing. After the physician completes the surgical preparation, press the firing lock 510, the firing lock switch 520 can be triggered, at this time, press the handle body 2041 again, trigger the first switch 2071, the actuating member 300 can move in the distal direction to fire the anastomat. By providing the firing lock switch 520, the safety and reliability of the electric anastomat are further improved, and the misfire when the physician does not complete the surgical preparation is avoided.

[0113] As shown in FIGS. 18, 19, 22 and 23, the handle member 204 further comprises a cooperating member 2042. The cooperating member 2042 is rotatably connected to the handle body 2041. In this embodiment, the handle body 2041 and the cooperating member 2042 can be mounted on the housing of the anastomat through the same rotation shaft 2043. The handle body 2041 further comprises a first linkage 2413. The cooperating member 2042 comprises a second linkage 2421. When the handle body 2041 is driven to move in the first direction, the first linkage 2413 acts on the second linkage 2421 to drive the cooperating member 2042 to move in the first direction. The cooperating member 2042 further comprises a first elastic member connected thereto, configured to provide an elastic force to the cooperating member 2042 to move in the second direction. In this embodiment, the first elastic member is a return spring 2052, both ends of which are connected to a spring fixing portion 2422 of the cooperating member 2042 and a spring fixing member 2094 respectively. After the cooperating member 2042 is rotated with the handle body 2041 in the first direction, the physician releases the handle body 2041, and under the elastic force of the return spring 2052, the cooperating member 2042 and the handle body 2041 return to the initial position again. A second elastic member is provided between the cooperating member 2042 and the handle body 2041. In this embodiment, the second elastic member is a torsion spring 2051, both feet of which abut against the cooperating member 2042 and the handle body 2041 respectively, and an elastic force is applied to the cooperating member 2042 and the handle body 2041 to keep them in the initial cooperating state. The types and fixing structures of the first and second elastic members are only examples and do not limit the protection scope of the present application.

[0114] As shown in FIG. 19 and FIG. 23, the trigger mechanism further comprises a stopper 2093 which blocks the movement of the cooperating member 2042 from the initial position in the second direction. The stopper 2093 is, for example, a boss or a pin fixed to the housing or the chassis of the stapler. The cooperating member 2042 is provided with an arc-shaped stop groove 2423, and the stopper 2093 is at least partially embedded in the interior of the stop groove 2423 and can move along the extension direction of the stop groove 2423. When the handle component 204 is in the initial state, the cooperating member 2042 is in the initial position, and the stopper 2093 is at the top end of the stop groove 2423. At this time, if the doctor presses the handle body 2041, the handle body 2041 drives the cooperating member 2042 to rotate in the first direction, and the stop groove 2423 moves relative to the stopper 2093. The cooperation between the stopper 2093 and the stop groove 2423 also provides a guiding function for the cooperating member 2042 and does not block the movement of the cooperating member 2042 in the first direction. When the handle component 204 is in the initial state, the cooperating member 2042 is in the initial position, and if the doctor lifts the handle body 2041 so that the handle body 2041 moves in the second direction, the cooperating member 2042 will not remain in the initial position when the handle body 2041 rotates under the blocking action of the stopper 2093. At this time, the torsional spring 2051 will be elastically deformed, and after the doctor releases the handle body 2041, the handle body 2041 will return to its initial position relative to the cooperating member 2042 in the first direction under the elastic force of the torsional spring 2051.

[0115] The specific working mode of the firing assembly will be described below in combination with FIG. 21, FIG. 24 and FIG. 25.

[0116] As shown in FIG. 18, FIG. 21 and FIG. 24, when the handle component 204 is in the initial state, the doctor holds and presses the handle body 2041 to rotate the handle body 2041 in the first direction, the first driving part 2411 drives the first trigger 2061 to rotate in the second direction, the first trigger 2061 triggers the first switch 2071, the first switch 2071 sends a first trigger signal to the controller, and the controller sends a first start signal to the motor 210 after receiving the first trigger signal, the motor 210 starts the forward rotation, drives the actuating member 300 to move in the distal direction through the gear set 220, and closes the cartridge assembly. After the stapler is closed, if the doctor does not press the firing safety 510, the stapler is in the firing safety state, and even if the doctor presses the handle body 2041 again, the controller will not send the first start signal to the motor 210, and the firing of the stapler cannot be performed. When the doctor presses the firing safety 510 to trigger the firing safety switch 520, the firing safety switch 520 sends a safety release signal to the controller. At this time, if the doctor presses the handle body 2041 again, the controller sends the first start signal to the motor 210 again, and the motor 210 drives the actuating member 300 to move in the distal direction to fire the stapler.

[0117] As shown in FIG. 18, FIG. 21 and FIG. 25, after the completion of the firing of the anastomat, the handle part 204 is reset to the initial state by the reset spring 2052. The doctor lifts the handle body 2041 so that the handle body 2041 is rotated in the second direction, the second driving part 2412 drives the second trigger 2062 to rotate in the first direction, the second trigger 2062 triggers the second switch 2072, the second switch 2072 sends a second trigger signal to the controller, the controller sends a second start signal to the motor 210 after receiving the second trigger signal, the motor 210 starts to reverse, drives the actuating part 300 to move in the proximal direction through the gear set 220, so as to perform the back-off action of the anastomat, and open the jaw of the cartridge assembly.

[0118] By adopting the trigger mechanism of the second embodiment, a handle part applied to the electric anastomat is provided. By driving the handle part 204 to move in different directions, different switches can be triggered by different triggers respectively, and then the actuating part 300 of the electric anastomat is triggered to move in the distal direction or the proximal direction, so that the electric anastomat can be driven by the handle part 204 to perform the closing, firing and back-off operations. The driving mode of the handle part 204 is more in line with the operation habit of the doctor, and the use is more convenient. The trigger mechanism has a simple structure, high structural stability, and no matter whether the anastomat is operated with the right hand or the left hand, the operation mode of the handle part 204 is unchanged, and misoperation is not easy, which improves the use reliability of the trigger structure.

[0119] FIG. 26-35 show the structure of the trigger mechanism of the third embodiment of the application. FIG. 26 is a partial structure schematic view of the instrument platform of the anastomat of the third embodiment. As shown in FIG. 26, the electric anastomat comprises an instrument platform and a cartridge assembly installed at the distal end of the instrument platform. The instrument platform comprises a housing, a rack 110 and a firing assembly. FIG. 27 and FIG. 28 are structure schematic views of the firing assembly of the embodiment. As shown in FIG. 26-28, the firing assembly comprises an actuating part 300, a motor 210, a circuit board 400 and a trigger mechanism. The actuating part 300 extends along the axial direction of the anastomat, and one side surface of the actuating part 300 is provided with a tooth surface. The output shaft of the motor 210 is connected to the tooth surface of the actuating part 300 through a gear set 220, so that the rotation of the output shaft of the motor 210 can drive the actuating part 300 to move in the axial direction. The circuit board 400 is provided with a controller for controlling the start-stop and rotation direction of the motor 210.

[0120] In this embodiment, in the perspective of FIGS. 26 and 27, the direction from right to left is the direction toward the distal end, and the direction from left to right is the direction toward the proximal end. In the perspective of FIG. 28, the direction from left to right is the direction toward the distal end. The up-and-down direction in FIGS. 26-28 is the longitudinal direction, i.e., the height direction. The direction perpendicular to the plane of the paper in FIGS. 26-28 is the lateral direction, i.e., the width direction, which is perpendicular to the axial direction and the longitudinal direction.

[0121] As shown in FIGS. 26-29, in this embodiment, the trigger mechanism includes a switch assembly, a handle member 301, and a trigger member including a trigger piece 303. The switch assembly includes a first switch 3021 and a second switch 3022 arranged in the axial direction, the first switch 3021 having a first contact 3211 arranged below it, and the second switch 3022 having a second contact 3221 arranged below it, the first switch 3021 and the second switch 3022 being mounted to a circuit board 400, which is connected to the controller by a circuit on the circuit board 400. The first switch 3021 is configured to activate the movement of the actuation member 300 of the electric anastomat in the distal direction when the first contact 3211 is triggered. The second switch 3022 is configured to activate the movement of the actuation member 300 of the electric anastomat in the proximal direction when the second contact 3221 is triggered. The handle member 301 includes a handle body 3011, the handle body 3011 including a pivot portion 3112, a gripping portion 3111, and a driving portion 3113, the pivot portion 3112 being rotatably connected to the housing of the anastomat by a pivot shaft 3013, the gripping portion 3111 being used for the physician to hold and operate. The trigger piece 303 is arranged on the side of the handle member 301 facing the switch assembly, the trigger piece 303 being configured to trigger the first contact 3211 when the handle member 301 drives the trigger piece 303 to move in the first axial direction of the anastomat, and to trigger the second contact 3221 when the handle member 301 drives the trigger piece 303 to move in the second axial direction of the anastomat. The first axial direction and the second axial direction are opposite directions, the first axial direction being the direction toward the distal end, and the second axial direction being the direction toward the proximal end.

[0122] As shown in FIG. 29 and FIG. 30, in this embodiment, the trigger 3 comprises a trigger body 3030, a connecting portion 3033, a first trigger portion 3031 and a second trigger portion 3032, the first trigger portion 3031 and the second trigger portion 3032 are arranged in the axial direction and are arranged on the side of the trigger body 3030 facing the switch assembly, and the connecting portion 3033 is arranged on the side of the trigger body 3030 facing the handle body 3011. The driving portion 3113 is rotatably connected with the connecting portion 3033. In this embodiment, as shown in FIG. 30 and FIG. 31, the driving portion 3113 is provided with a recess with an arc-shaped bottom surface, and the bottom of the connecting portion 3033 is cylindrical and is embedded in the recess, so that the connecting portion 3033 can rotate smoothly relative to the driving portion 3113. The trigger body 3030 and the housing or rack 110 of the anastomat can be provided with axial guiding structure. For example, a protrusion is arranged on the side surface of the trigger body 3030, a guiding groove extending in the axial direction is arranged on the housing or rack 110 of the anastomat, or a guiding groove extending in the axial direction is arranged on the side surface of the trigger body 3030, and a protrusion is arranged on the housing or rack 110 of the anastomat. The protrusion is embedded in the guiding groove and can move along the extension direction of the guiding groove.

[0123] As shown in FIG. 29 and FIG. 30, in this embodiment, the first trigger portion 3031 is located on the proximal side of the first contact 3211, and the side surface of the first trigger portion 31 opposite to the first contact 3211 (the distal end surface of the first trigger portion 3031) is an inclined first guide surface 3311, so that the first trigger portion 3031 moves more smoothly when triggering the first contact 3211. The second trigger portion 3032 is located on the distal side of the second contact 3221, and the side surface of the second trigger portion 32 opposite to the second contact 3221 (the proximal end surface of the second trigger portion 332) is an inclined second guide surface 3321, so that the second trigger portion 3032 moves more smoothly when triggering the second contact 3221. Through reasonable design and arrangement of the structure and position of each component of the trigger mechanism, the space inside the instrument platform is fully utilized, which is conducive to realizing the miniaturization of the electric anastomat.

[0124] In this embodiment, the handle component 301 comprises a handle body 3011 which is rotatably connected to the housing of the stapler. Fig. 29 shows the initial position of the handle body 3011. When the doctor presses the handle body 3011 so that the handle body 3011 is rotated from the initial position in a first direction (counterclockwise direction in Fig. 29), the handle body 3011 drives the trigger 303 to move in a first axial direction (toward the distal end direction), the first trigger portion 3031 triggers the first switch 3021, and the first switch 3021 activates the actuator 300 to move in the distal direction to realize the closing and firing of the stapler. When the doctor lifts the handle body 3011 so that the handle body 3011 is rotated from the initial position in a second direction (clockwise direction in Fig. 29), the handle body 3011 drives the trigger 303 to move in a second axial direction (toward the proximal end direction), the second trigger portion 3032 triggers the second switch 3022, and the second switch 3022 activates the actuator 300 to move in the proximal direction to realize the back-off of the stapler.

[0125] Therefore, by adopting the trigger mechanism of the present application, the doctor can trigger the stapler to perform the actions of closing, firing and back-off by operating the handle component 301 to drive the trigger 303 to move in different directions when operating the stapler, the use of the handle component 301 is more in line with the use habits of the doctor, and the different operations are not easy to confuse, whether the doctor holds the handle component 301 with the right hand or the left hand, the operation mode of the handle component 301 is not easy to mistake, which is beneficial to reduce the misoperation of the doctor, thereby improving the safety and reliability of the use of the instrument.

[0126] The handle body 3011 further comprises a first linkage 3114. The handle member 301 further comprises a cooperating member 3012, which comprises a second linkage 3121 and a spring fixing portion 3122. The spring fixing portion 3122 is connected to one end of a first elastic member, and the other end of the first elastic member is connected to the housing of the anastomat. The first elastic member can be a return spring 3051, which provides an elastic force to the cooperating member 3012 to move in the second direction. As shown in FIG. 28, FIG. 32 and FIG. 33, a second elastic member is further provided between the handle body 3011 and the cooperating member 3012. In this embodiment, the second elastic member can be a torsion spring 3052, and two feet of the torsion spring 3052 abut against the handle body 3011 and the cooperating member 3012 respectively, and the torsion spring 3052 applies an elastic force to the handle body 3011 and the cooperating member 3012 respectively to keep them in the initial cooperating state. The trigger mechanism further comprises a limiting member 304, which is for example a limiting pin or a limiting protrusion fixed on the housing of the anastomat. One side of the cooperating member 3012 is provided with an arc-shaped cooperating groove 3123, and the limiting member 304 is at least partially embedded in the cooperating groove 3123. When the handle body 3011 is in the initial position, the limiting member 304 is located at the top of the cooperating groove 3123. When the doctor operates the handle body 3011 to rotate in the first direction, the cooperating member 3012 is driven to rotate in the first direction by the first linkage 3114 and the second linkage 3121, the cooperating member 3012 drives the return spring 3051 to elastically deform, the cooperating groove 3123 moves relative to the limiting member 304, and the limiting member 304 is located at the lower part of the cooperating groove 3123, and the cooperation between the cooperating groove 3123 and the limiting member 304 can guide the rotational movement of the cooperating member 3012. When the doctor releases the handle body 3011, the handle body 3011 and the cooperating member 3012 will return to the initial position under the elastic deformation recovery force of the return spring 3051. When the doctor operates the handle body 3011 to rotate in the second direction, the cooperating member 3012 is blocked by the limiting member 304 and does not rotate, and the handle body 3011 drives the second elastic member to elastically deform. When the doctor releases the handle body 3011, the handle body 3011 will move in the first direction relative to the cooperating member 3012 to return to the initial position under the elastic deformation recovery force of the torsion spring 3052.

[0127] The working mode of the firing assembly will be described in detail below with reference to FIG. 27, FIG. 29, FIG. 34 and FIG. 35.

[0128] As shown in FIG. 27 and FIG. 29, in the initial state, the handle body 3011, the cooperating member 3012 and the trigger member 303 are all in the initial position. The driving part 3113 does not act on the trigger member 303, the trigger member 303 does not act on the first switch 3021 and the second switch 3022, at this time the motor 210 is not started, and the actuating rod is in the initial position at the proximal end. As shown in FIG. 34, the doctor presses the handle body 3011, so that when the handle body 3011 rotates in the first direction, the first linkage part 3114 drives the second linkage part 3121, so that the cooperating member 3012 also rotates in the first direction, at this time the reset spring 3051 is elastically deformed. The driving part 3113 drives the trigger member 303 to move in the distal direction through the connecting part 3033, the first trigger part 3031 contacts the first contact 3211, the first switch 3021 sends a first trigger signal to the controller, the controller sends a first start signal to the motor, the motor starts the forward rotation, and drives the actuating member to move in the distal direction through the gear set to close the anastomat. After the anastomat is closed, the doctor presses the firing safety 510 to release the firing safety of the anastomat, at this time the doctor presses the handle body 3011 again to trigger the first switch 3021 again, the controller controls the motor to rotate forward to drive the actuating member to continue to move in the distal direction to fire the anastomat. When the doctor releases the handle body 3011, the handle body 3011 and the cooperating member 3012 can return to the initial position under the action of the reset spring 3051.

[0129] As shown in FIG. 35, after the anastomat is fired, the doctor lifts the handle body 3011 upward, so that the handle body 3011 rotates in the second direction, and the cooperating member 3012 remains in the initial position without movement. The driving part 3113 drives the trigger member 303 to move reversely in the proximal direction, the second trigger part 3032 triggers the second switch 3022, the controller controls the motor to reverse, and drives the actuating member to move in the proximal direction through the gear set to open the jaw of the anastomat. When the doctor releases the handle body 3011, the handle body 3011 can return to the initial position under the action of the torsional spring 3052.

[0130] By adopting the trigger mechanism of the third embodiment, when the doctor operates the anastomat, the doctor drives the trigger member 303 to move in different directions by operating the handle part 301, so that when the first switch 3021 is triggered, the actuating member 300 can be started to move in the distal direction, thereby completing the closing and firing actions of the anastomat, when the second switch 3022 is triggered, the actuating member 300 can be started to move in the proximal direction, thereby completing the back-off action of the anastomat, the use of the handle part 301 is more in line with the use habit of the doctor, and different operations are not easy to be confused, which is beneficial to reduce the misoperation of the doctor, thereby improving the safety and reliability of the use of the instrument.

[0131] The above description is further detailed in combination with specific preferred embodiments of the present application, and cannot be deemed to limit the specific implementation of the present application to these descriptions. For those of ordinary skill in the art to which the present application belongs, several simple deductions or replacements can be made without departing from the concept of the present application, and all of them shall be deemed to fall within the protection scope of the present application.

Claims

1. A trigger mechanism, characterized by The trigger mechanism comprises: a first switch and a second switch, the first switch being configured to be triggered to initiate a distal movement of an actuating mechanism of the electric anastomat, the second switch being configured to be triggered to initiate a proximal movement of the actuating mechanism; a handle component and a trigger component, the handle component comprising a driving part; wherein the driving part triggers the first switch via the trigger component when the handle component is driven to move in a first direction, and triggers the second switch via the trigger component when the handle component is driven to move in a second direction.

2. The trigger mechanism of claim 1, wherein, The driving part of the handle component comprises a first driving part and a second driving part, and the trigger component comprises a first trigger and a second trigger; the first driving part drives the first trigger to move when driven to move in a first direction, so that the first trigger triggers the first switch, and the second driving part drives the second trigger to move when driven to move in a second direction, so that the second trigger triggers the second switch.

3. The trigger mechanism of claim 2, wherein, The first switch and the second switch are respectively located on two sides of a transverse direction of a shaft center of the electric anastomat.

4. The trigger mechanism of claim 3, wherein, The first trigger comprises a first pivoting part, and the second trigger comprises a second pivoting part, the first pivoting part and the second pivoting part are respectively rotatably installed on two sides of a transverse direction of a frame of the electric anastomat.

5. The trigger mechanism of claim 4, wherein, A first side of the first pivoting part is provided with a third driving part, and a second side of the first pivoting part is provided with a first trigger part, the third driving part is configured to be driven to move by the first driving part, so that the first trigger part triggers the first switch; a first side of the second pivoting part is provided with a fourth driving part, and a second side of the second pivoting part is provided with a second trigger part, the fourth driving part is configured to be driven to move by the second driving part, so that the second trigger part triggers the second switch.

6. The trigger mechanism of claim 5, wherein, A second side of the first trigger is further provided with a first limiting part, the first limiting part is at least partially located between the first switch and the frame; a second side of the second trigger is further provided with a second limiting part, the second limiting part is at least partially located between the second switch and the frame.

7. The trigger mechanism of claim 3, wherein, The handle component comprises a fitting part and a handle, the fitting part comprises the first driving part, and the handle comprises the second driving part, the handle is configured to be driven to move in the first direction, so that the fitting part is driven to move in the first direction.

8. The trigger mechanism of claim 7, wherein, The handle component further comprises a first biasing part, the first biasing part is configured to apply a biasing force to the fitting part to move in the second direction.

9. The trigger mechanism of claim 7, wherein, The handle component further comprises a limiting part and a second biasing part, the limiting part is configured to block the fitting part from moving in the second direction from an initial position, and the second biasing part is configured to apply a biasing force to the handle to move in the first direction relative to the fitting part.

10. The trigger mechanism of claim 3, wherein, The first switch and the first driving part are respectively at least partially located on two sides of a longitudinal direction of the first trigger, and the second switch and the second driving part are respectively at least partially located on two sides of a longitudinal direction of the second trigger.

11. The trigger mechanism of claim 2, wherein, The first trigger and the second trigger are rotatably installed on a frame of the stapler.

12. The trigger mechanism of claim 2, wherein, The first switch and the second switch are arranged along an axial direction of the stapler.

13. The trigger mechanism of claim 12, wherein, The first trigger and the second trigger are arranged along the axial direction.

14. The trigger mechanism of claim 13, wherein, The second switch is arranged on a proximal side of the first switch, and the second trigger is arranged on a proximal side of the first trigger.

15. The trigger mechanism of claim 13, wherein, The first driving part is at least partially located between the first trigger and the second trigger, and the second driving part is at least partially located between the first trigger and the second trigger.

16. The trigger mechanism of claim 12, wherein, The handle part comprises a handle body rotatably connected to a housing of the stapler, and the first driving part and the second driving part are arranged on a side of the handle body facing the first trigger and the second trigger.

17. The trigger mechanism of claim 16, wherein, The handle part further comprises a cooperating part rotatably connected to the handle body, wherein the handle body drives the cooperating part to move in the first direction when the handle body is driven to move in the first direction; the cooperating part is connected to a first elastic part configured to provide an elastic force for the cooperating part to move in the second direction; and a second elastic part is arranged between the cooperating part and the handle body.

18. The trigger mechanism of claim 17, wherein, The trigger mechanism further comprises a limiting part, wherein the cooperating part is provided with a stop groove, the limiting part is at least partially embedded in the stop groove, and the limiting part blocks movement of the cooperating part in the second direction from an initial position.

19. The trigger mechanism of claim 1, wherein, The first switch is provided with a first contact and a second contact, the trigger part comprises a trigger, the trigger is arranged on a side of the handle part facing the first switch and the second switch, and the trigger is configured to trigger the first contact to start movement of the actuating mechanism in a distal direction when the trigger is driven by the handle part to move in a first axial direction of the stapler, and the trigger is configured to trigger the second contact to start movement of the actuating mechanism in a proximal direction when the trigger is driven by the handle part to move in a second axial direction of the stapler.

20. The trigger mechanism of claim 19, wherein, The trigger comprises a trigger body, a first trigger part, and a second trigger part, the first trigger part and the second trigger part are arranged along the axial direction, and are arranged on a side of the trigger body facing the first switch and the second switch.

21. The trigger mechanism of claim 20, wherein, A side of the first trigger part opposite to the first contact is an inclined first guide surface, and a side of the second trigger part opposite to the second contact is an inclined second guide surface.

22. The trigger mechanism of claim 19, wherein, The handle part comprises a handle body rotatably connected to a housing of the stapler, the handle body drives the trigger to move in the first axial direction when the handle body is rotated in a first direction, and the handle body drives the trigger to move in the second axial direction when the handle body is rotated in a second direction, the second axial direction being opposite to the first axial direction.

23. The trigger mechanism of claim 22, wherein, The handle body comprises the driving part, and the trigger comprises a connecting part, the driving part is rotatably connected to the connecting part.

24. The trigger mechanism of claim 22, wherein, The handle component further comprises a fitting member connected to the first elastic member, and the handle body drives the fitting member to rotate in the first direction when the handle body rotates in the first direction, and the fitting member drives the first elastic member to elastically deform.

25. The trigger mechanism of claim 24, wherein, The handle body and the fitting member are further provided with a second elastic member, and the trigger mechanism further comprises a limiting member, and the fitting member is blocked by the limiting member and cannot rotate when the handle body rotates in the second direction, and the handle body drives the second elastic member to elastically deform.

26. A firing assembly comprising: The trigger mechanism comprises a power mechanism, an actuating mechanism, a controller, and any one of claims 1-25. The controller is configured to send a first start signal to the power mechanism when a signal that the first switch is triggered is received, and send a second start signal to the power mechanism when a signal that the second switch is triggered is received. The power mechanism is configured to drive the actuating mechanism to move in a distal direction when the first start signal is received, and drive the actuating mechanism to move in a proximal direction when the second start signal is received.

27. An electrically powered anastomosis device, comprising: The trigger mechanism comprises a power mechanism, an actuating mechanism, a controller, and any one of claims 1-25. The trigger mechanism comprises a power mechanism, an actuating mechanism, a controller, and any one of claims 1-25.

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