Triggering mechanism, percussion assembly and electric anastomat

Abstract

The utility model provides a triggering mechanism, a percussion assembly and an electric anastomat, the triggering mechanism comprises a first switch and a second switch, the first switch and the second switch are located on the two transverse sides of the axis of the electric anastomat respectively, the first switch is configured to start an actuating mechanism of the electric anastomat to move in the far-end direction when triggered, and the second switch is configured to start the actuating mechanism of the electric anastomat to move in the far-end direction when triggered; the second switch is configured to start an actuating mechanism of the electric anastomat to move towards the near end when being triggered; the handle component comprises a first driving part and a second driving part; a first trigger member and a second trigger member; when the first driving part is driven to move along a first direction, the first triggering piece is driven to move, so that the first triggering piece triggers the first switch; and when the second driving part is driven to move along a second direction, the second triggering piece is driven to move, so that the second triggering piece triggers the second switch. According to the electric anastomat, misoperation of the electric anastomat is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a trigger mechanism, a firing assembly and an electric stapler. Background Art

[0002] An electric stapler is a surgical instrument used for tissue anastomosis and resection, typically achieving tissue clamping and cutting through a precise mechanical structure. It is widely used in surgical procedures. An electric stapler generally comprises an instrument platform and a stapler assembly connected to the distal end of the instrument platform. The instrument platform houses a firing assembly, which includes an actuator rod, a motor, and a start button. The start button includes a first button for driving the motor forward and a second button for driving the motor reverse. The motor is used to drive the actuator rod distally to close and fire the stapler assembly when forward rotation is initiated, and to retract the actuator rod proximally to open the jaws of the stapler assembly when reverse rotation is initiated. During surgery, the firing assembly first drives the jaws of the stapler assembly closed to clamp tissue, and then the actuator rod continues to drive the stapler assembly to perform the cutting and suturing actions. After the stapler is fired, the actuator rod retracts to open the jaws of the stapler assembly.

[0003] In actual applications, surgical scenarios are complex and changeable. During the operation, doctors often have to repeatedly adjust the position of the electric stapler. The existing technology uses a start button to control the start of the motor. Different buttons are easily confused, and when the doctor holds the instrument in different ways, different operating methods are also easily confused, which can easily cause the doctor to make mistakes and affect the normal progress of the operation. Utility Model Content

[0004] In response to the problems in the prior art, the purpose of this application is to provide a trigger mechanism, a firing assembly and an electric stapler, which drive different trigger parts by moving the handle part in different directions, and then trigger different starting switches. The use of the handle part is more in line with the doctor's operating habits and is not prone to misoperation.

[0005] According to a first aspect of the present application, there is provided a trigger mechanism for an electric stapler, the trigger mechanism comprising: a first switch and a second switch, respectively located on either side of the axis of the electric stapler, the first switch being configured to activate the actuator of the electric stapler to move in a distal direction when triggered, and the second switch being configured to activate the actuator of the electric stapler to move in a proximal direction when triggered; a handle component comprising a first driving portion and a second driving portion; a first triggering member and a second triggering member; wherein, when the first driving portion is driven to move in a first direction, the first triggering member is driven to move so that the first triggering member triggers the first switch; and when the second driving portion is driven to move in a second direction, the second triggering member is driven to move so that the second triggering member triggers the second switch.

[0006] In some embodiments, the first trigger member includes a first pivot portion, the second trigger member includes a second pivot portion, and the first pivot portion and the second pivot portion are rotatably mounted on two lateral sides of the frame of the electric stapler.

[0007] In some embodiments, a third driving portion is provided on the first side of the first pivot portion, and a first triggering portion is provided on the second side of the first pivot portion. The third driving portion is configured to be driven by the first driving portion to move so that the first triggering portion triggers the first switch; a fourth driving portion is provided on the first side of the second pivot portion, and a second triggering portion is provided on the second side of the second pivot portion. The fourth driving portion is configured to be driven by the second driving portion to move so that the second triggering portion triggers the second switch.

[0008] In some embodiments, a first limiting portion is further provided on the second side of the first trigger member, and the limiting portion is at least partially located between the first switch and the frame; a second limiting portion is further provided on the second side of the second trigger member, and the limiting portion is at least partially located between the second switch and the frame.

[0009] In some embodiments, the handle component includes a mating piece and a handle, the mating piece includes the first driving portion, the handle includes the second driving portion, and the handle is configured to drive the mating piece to move along the first direction when driven to move along the first direction.

[0010] In some embodiments, the handle component further includes a first biasing member configured to apply a biasing force to the mating member to cause it to move along the second direction.

[0011] In some embodiments, the handle component further includes a limit member and a second biasing member, wherein the limit member is configured to prevent the mating member from moving along the second direction from an initial position, and the second biasing member is configured to apply a biasing force to the handle causing it to move along the first direction relative to the mating member.

[0012] In some embodiments, the first switch and the first driving part are respectively at least partially located on both sides of the longitudinal direction of the first trigger member, and the second switch and the second driving part are respectively at least partially located on both sides of the longitudinal direction of the second trigger member.

[0013] The second aspect of the present application provides a firing assembly, comprising a power mechanism, an actuating mechanism, a controller, and the trigger mechanism described in the first aspect; 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 to 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 a distal direction when receiving the first start signal, and to drive the actuating mechanism to move in a proximal direction when receiving the second start signal.

[0014] A third aspect of the present application provides an electric stapler, comprising the trigger mechanism described in the first aspect or the firing assembly described in the second aspect.

[0015] The trigger mechanism, firing assembly, and electric stapler provided by this application have the following advantages:

[0016] The present application provides a trigger mechanism for starting a stapler for surgical operations, which drives different trigger parts by moving the handle component in different directions, thereby triggering different starting switches, thereby respectively realizing the closing, firing and retraction actions of the electric stapler. The use of the handle component of the electric stapler is more in line with the doctor's operating habits, and is less likely to cause misoperation, thereby improving surgical safety and convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0018] Figure 1 This is a first side view schematic diagram of a partial structure of an instrument platform of an electric stapler according to an embodiment of the present application;

[0019] Figure 2 This is a second side view schematic diagram of a partial structure of an instrument platform of an electric stapler according to an embodiment of the present application;

[0020] Figure 3 is a first side view of a firing assembly according to an embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the cooperation between the firing safety member and the firing safety switch according to one embodiment of the present application;

[0022] Figure 5 is a schematic diagram of the cooperation between the first trigger and the first switch according to an embodiment of the present application;

[0023] Figure 6 This is a schematic structural diagram of a second triggering member according to an embodiment of the present application;

[0024] Figure 7This is a schematic diagram of the cooperation between a trigger and a switch according to an embodiment of the present application;

[0025] Figure 8 is a partial three-dimensional diagram of a trigger mechanism according to an embodiment of the present application;

[0026] Figure 9 This is a schematic structural diagram of a handle component according to an embodiment of the present application;

[0027] Figure 10 This is a schematic diagram of the cooperation between the handle and the matching piece according to one embodiment of the present application;

[0028] Figure 11 This is a schematic diagram of the cooperation between the handle and the torsion spring according to an embodiment of the present application;

[0029] Figure 12 is a schematic diagram of a handle component according to an embodiment of the present application entering a first state from an initial state;

[0030] Figure 13 is a schematic diagram of a handle component according to an embodiment of the present application entering a second state from an initial state;

[0031] Figure 14 This is a first side view of the trigger mechanism when the handle component of one embodiment of the present application is in an initial state;

[0032] Figure 15 is a first side view of the trigger mechanism when the handle component of one embodiment of the present application is in the first state;

[0033] Figure 16 is a second side view of the trigger mechanism when the handle component of one embodiment of the present application is in the initial state;

[0034] Figure 17 This is a second side view of the trigger mechanism when the handle component of one embodiment of the present application is in the second state.

[0035] Reference numerals:

[0036] 11 Frame 714 First Installation Section

[0037] 12 Connecting rod 715 Grip

[0038] 2 Power mechanism 72 matching parts

[0039] 21 Motor 721 First drive unit

[0040] 22 Gear set 722 Second matching portion

[0041] 221 first gear 723 second through hole

[0042] 222 second gear 724 second mounting portion

[0043] 3 Actuator 73 Torsion spring

[0044] 31 tooth surface 74 return spring

[0045] 51 first switch 75 limiter

[0046] 511 First trigger position 76 Rotation axis

[0047] 52 Second switch 77 Spring fixing member

[0048] 521 Second trigger position 81 First trigger member

[0049] 53 Trigger safety switch 811 First pivoting portion

[0050] 531 Third trigger position 812 Third driving unit

[0051] 54 circuit board 813 first limit part

[0052] 6 Firing safety element 814 First trigger part

[0053] 61 Rod 815 First guide

[0054] 62 third trigger part 82 second trigger member

[0055] 7 Handle component 821 Second pivot portion

[0056] 71 handle 822 fourth drive unit

[0057] 711 Second driving part 823 Second limiting part

[0058] 712 first matching portion 824 second trigger portion

[0059] 713 first through hole 825 second guide portion DETAILED DESCRIPTION

[0060] Example embodiments will now be described more fully. However, the example embodiments can be implemented in a variety of 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 comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. "Or" and "or" in the specification may both 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 the present application, these terms are used herein only for convenience, such as according to the directions 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 indicate certain features, this is only to indicate the function and not to limit the number and importance of specific features.

[0061] The present application provides a trigger mechanism, a firing assembly, and an electric stapler. The electric stapler includes an instrument platform and a stapler assembly connected to the distal end of the instrument platform. The instrument platform includes a housing and a firing assembly at least partially located within the housing. The firing assembly includes a power mechanism, an actuating mechanism, a controller, and a trigger mechanism. The trigger mechanism includes: a first switch and a second switch, respectively located on either side of the axis of the electric stapler; a handle component, including a first drive portion and a second drive portion; and a first trigger member and a second trigger member.

[0062] When the first driving portion is driven to move in a first direction, it drives the first trigger member to move, causing the first trigger member to trigger a first switch. When the first switch is triggered, it is configured to start the actuator of the electric stapler to move in a distal direction, thereby completing the closing and firing actions of the electric stapler. When the second driving portion is driven to move in a second direction, it drives the second trigger member to move, causing the second trigger member to trigger a second switch. When the second switch is triggered, it is configured to start the actuator of the electric stapler to move in a proximal direction, thereby completing the retraction action of the electric stapler.

[0063] Therefore, in the present application, different triggering parts are driven by the movement of the handle part in different directions, thereby triggering different starting switches to respectively realize the closing, firing and retraction actions of the electric stapler. The use of the handle part is more in line with the doctor's operating habits, and no matter whether the doctor holds the handle part with his forehand or backhand, the two operating methods of the handle part are not easy to cause confusion, so it is not easy to cause misoperation, which improves the safety of the operation and the convenience of use.

[0064] The structure of the trigger mechanism of each specific embodiment of the present application is described in detail below with reference to the accompanying drawings. It will be understood that the specific embodiments are not intended to limit the scope of protection of the present application. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions 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, and the end farther from the operator, that is, the end closer to the surgical site is the distal end. The direction along the axis of the stapler is the axial direction, that is, the direction from the distal end to the proximal end of the stapler, or from the proximal end to the distal end of the stapler. For example, in Figure 1 and Figure 2 From the perspective of the stapler, the S1 direction is from the proximal end to the distal end. The transverse direction refers to the width direction of the stapler, that is, Figure 1 and Figure 2 The direction perpendicular to the paper is Figure 8 The longitudinal direction refers to the height direction of the stapler, that is, Figure 1 and Figure 2 The axis refers to the axis of the long axis of the stapler assembly and the instrument platform of the electric stapler, such as Figure 1 The axis of the middle connecting rod 12.

[0065] Figure 1 and Figure 2 A partial side schematic diagram of the instrument platform of an electric stapler according to an embodiment of the present application is shown. The instrument platform of the electric stapler includes a housing (not shown in the figure), a frame 11, a firing assembly and a connecting rod 12, the distal end of the connecting rod 12 is connected to a staple cartridge assembly (not shown in the figure), and the firing assembly and the frame 11 are at least partially located inside the housing. The firing assembly includes a power mechanism 2, an actuating mechanism, a controller and a trigger mechanism. The trigger mechanism includes a first switch 51, a second switch 52, a handle component 7, a first trigger member 81 and a second trigger member 82. The handle component 7 is rotatably mounted to the housing of the electric stapler so that at least a portion of the handle component 7 can rotate relative to the housing.

[0066] The power mechanism 2 includes a motor 21 and a gear set 22. The gear set 22 includes a first gear 221 connected to the output shaft of the motor 21 and a second gear 222 meshing with the first gear 221. The actuator mechanism includes an actuator 3, which extends axially along the stapler and includes a tooth surface 31 meshing with the second gear 222. The second gear 31 meshes with the tooth surface 31 to transmit the torque of the motor 21 to the actuator 3 via the gear set 22. The controller is disposed on a circuit board 54. The first switch 51 and the second switch 52 are respectively connected to the circuit board 54 and are electrically connected to the controller via wiring on the circuit board 54.

[0067] The handle member 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 Figure 3 The second direction is the clockwise direction, that is, the direction close to the motor 21. Figure 3 The first driving portion 721 moves in the first direction, thereby driving the first trigger member 81 to move, thereby causing the first trigger member 81 to trigger the first switch 51. The first switch 51 is configured to send a first trigger signal to the controller when triggered. Upon receiving the first trigger signal, the controller sends a first start signal to the motor 21 of the power mechanism 2. Upon receiving the first start signal, the motor 21 starts to rotate forward, driving the actuator 3 to move in the distal direction. The actuator first drives the jaws of the staple cartridge assembly to close, and then drives the staples in the staple cartridge assembly to sew the tissue, thereby completing the closing and firing action of the electric stapler.

[0068] After the stapler is fired, when the doctor holds the electric stapler and lifts the handle part 7 upward, the handle part 7 is driven to rotate at least partially in the second direction, and the second driving part 711 moves along the second direction, driving the second trigger member 82 to move so that the second trigger member 82 triggers the second switch 52. The second switch 52 sends a second trigger signal to the controller. When the controller receives the second trigger signal, it sends a second start signal to the motor 21 of the power mechanism 2. When the motor 21 receives the second start signal, it starts to reverse and drives the actuator 3 to move in the proximal direction, thereby completing the retraction action of the electric stapler and driving the jaws of the staple magazine assembly to open through the actuator mechanism.

[0069] Therefore, in the present application, different triggering members are driven by the movement of the handle member 7 in different directions, thereby triggering different starting switches to respectively realize the closing, firing and retraction actions of the electric stapler. The use of the handle member 7 is more in line with the doctor's operating habits, and the convenience of use is improved. Since the operation methods of the first direction movement and the second direction movement of the handle member 7 are very different, for the doctor, whether holding the instrument with the forehand or the backhand, the operation method of the handle member 7 is the same, and the operation of pressing the handle member 7 and lifting the handle member 7 is not easy to be confused, so it is not easy to cause misoperation, which improves the safety of the operation.

[0070] The moving positions of the actuator 3 include: an initial position when not driven, a closed position in which the jaws of the stapler assembly are closed in the distal direction, and a firing position in which the stapler is fired. Figure 3 and Figure 4As shown, the trigger mechanism also includes a firing safety member 6 and a firing safety switch 53. The firing safety switch 53 is configured to prohibit the activation of the actuator 3 from moving in the distal direction when it is not triggered and the actuator 3 is in the closed position. The firing safety member 6 is configured to trigger the firing safety switch 53 when it is actuated. In this embodiment, the firing safety member 6 includes a rod portion 61, which extends in a transverse direction, and the first and second ends of the rod portion 61 at least partially extend through the two side surfaces of the housing, respectively, to facilitate the doctor's pressing operation. The rod portion 61 can be pressed to move axially. Two third trigger portions 62 are provided between the first and second ends of the rod portion 61, and a cavity is provided between the two third trigger portions 62. In the initial state, the third trigger position 531 of the firing safety switch 53 is located within the cavity between the two third trigger portions 62, and the firing safety switch 53 is not triggered. In this state, under the control of the controller, when the actuator 3 is in the closed position, even if the doctor presses the handle 7 to trigger the first switch 51 and the controller receives the first trigger signal, it will not send the first start signal to the motor 21. The motor 21 cannot drive the actuator 3 to fire the stapler, thus preventing the doctor from operating incorrectly when the doctor is not fully prepared for the operation, further improving surgical safety. After the doctor is fully prepared for the operation, he presses one end of the rod 61 of the firing safety member 6, causing the rod 61 to move laterally. One of the third trigger portions 62 contacts the third trigger position 531 of the firing safety switch 53, triggering the firing safety switch 53. The firing safety switch 53 sends the third trigger signal to the controller. Only after receiving the third trigger signal does the controller deem the firing safety released. At this time, the doctor presses the handle 7 again. The controller again receives the first trigger signal from the first switch 51 and sends the first start signal to the motor 21.

[0071] like Figures 5 to 9As shown, the first switch 51 and the second switch 52 are respectively located on either side of the axis of the electric stapler. The first switch 51 and the first drive unit 721 are respectively at least partially located on either side of the first trigger member 81 in the longitudinal direction. For example, the first switch 51 is at least partially located above the first trigger member 81, and the first drive unit 721 is at least partially located below the first trigger member 81. The second switch 52 and the second drive unit 711 are respectively at least partially located on either side of the second trigger member 82 in the longitudinal direction. For example, the second switch 52 is at least partially located above the second trigger member 82, and the second drive unit 711 is at least partially located below the second trigger member 82. Therefore, this embodiment rationally arranges the positional relationship of the various components of the trigger mechanism. The first switch 51 and the second switch 52 are respectively located on either side of the axis in the transverse direction, and the switches, corresponding trigger members, and corresponding drive units are arranged in the longitudinal direction. This rationally arranges the layout of the trigger mechanism, reduces the space occupied by the trigger mechanism, and facilitates the miniaturization and lightweighting of the instrument platform of the electric stapler. Optionally, the first switch 51 and the second switch 52 are aligned in the transverse direction to improve the symmetry and stability of the overall structure and further help reduce the overall volume of the instrument platform. However, the present application is not limited to this. The first switch 51 and the second switch 52 can also be arranged one after the 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 falls within the scope of protection of the present application.

[0072] The first trigger member 81 includes a first pivot portion 811, a third drive portion 812, and a first trigger portion 814. The third drive portion 812 is located on a first side of the first pivot portion 811, and the first trigger portion 814 is located on a second side of the first pivot portion 811. The second trigger member 82 includes a second pivot portion 821, a fourth drive portion 822, and a second trigger portion 824. The fourth drive portion 822 is located on a first side of the second pivot portion 821, and the second trigger portion 824 is located on a second side of the second pivot portion 821. The first pivot portion 811 and the second pivot portion 821 are rotatably mounted on opposite lateral sides of the frame 11 of the electric stapler, respectively. When driven by the first drive portion 721, the first trigger member 81 rotates about the first pivot portion 811, thereby changing the position of the first trigger portion 814. When driven by the second drive portion 711, the second trigger member 82 rotates about the second pivot portion 821, 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 transverse direction. Optionally, the first pivot portion 811 and the second pivot portion 821 are aligned in the transverse direction. The first pivot portion 811 and the second pivot portion 821 can be installed on the housing of the anastomosis device using a common long rotating shaft, or can also be installed on the housing of the anastomosis device using two short rotating shafts. This structure is conducive to improving 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 to this. The first pivot portion 811 and the second pivot portion 821 can also be arranged one after the 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 falls within the scope of protection of the present application.

[0073] The third driving portion 812 is disposed on the path of movement of the first driving portion 721 in the first direction. The first trigger position 511 of the first switch 51 is located on the path of rotation of the first trigger portion 814 in the second direction. The third driving portion 812 is configured to be driven by the first driving portion 721 to rotate the entire first trigger member 81, causing the first trigger portion 814 to move in the second direction and trigger the first switch 51. The fourth driving portion 822 is disposed on the path of movement of the second driving portion 711 in the second direction. The second trigger position 521 of the second switch 52 is located on the path of rotation of the second trigger portion 824 in the first direction. The fourth driving portion 822 is configured to be driven by the second driving portion 711 to rotate the entire second trigger member 82, causing the second trigger portion 824 to trigger the second switch 52 in the first direction.

[0074] like Figure 7 As shown, the second side of the first trigger member 81 is further provided with a first limiting portion 813, and the first limiting portion 813 is at least partially located between the first switch 51 and the frame 11 (shown in FIG. Figure 1) to further limit the position of the first trigger member 81 and prevent the first trigger member 81 from unexpected lateral movement. A second limiting portion 823 is further provided on the second side of the second trigger member 82. The second limiting portion 823 is at least partially located between the second switch 52 and the frame 11 (shown in FIG. Figure 2 ) to further limit the position of the second trigger member 82, preventing the second trigger member 82 from undesired lateral movement. The first limiter 813 and the second limiter 823 further enhance the overall structural stability of the instrument platform. Furthermore, the contact surfaces of the first limiter 813 with the first switch 51 and the first limiter 813 with the frame 11 can generate a certain amount of friction, maintaining the first trigger member 81 in its initial position. When the doctor is not operating the handle member 7, even if the instrument platform vibrates, the first trigger member 81 is unlikely to rotate, thereby preventing accidental firing of the stapler. The contact surfaces of the second limiter 823 with the second switch 52 and the second limiter 823 with the frame 11 can also generate a certain amount of friction, maintaining the second trigger member 82 in its initial position. When the doctor is not operating the handle member 7, even if the instrument platform vibrates, the second trigger member 82 is unlikely to rotate, thereby preventing accidental firing of the stapler. A first guide portion 815, such as a protruding column structure, is provided on the first side of the first trigger member 81. A second guide portion 825, such as a protruding column structure, is provided on the second side of the second trigger member 82. A first arcuate guide groove and a second arcuate guide groove may also be provided on the housing or frame of the stapler. When the first trigger member 81 is in its initial position, the first guide portion 815 is located at the first end of the first guide groove. When the first trigger member 81 rotates in the second direction, the first guide portion 815 moves along the arcuate direction of the first guide groove, thereby guiding the rotation of the first trigger member 81. When the second trigger member 82 is in its initial position, the second guide portion 825 is located at the first end of the second guide groove. When the second trigger member 82 rotates in the first direction, the second guide portion 825 moves along the arcuate direction of the second guide groove, thereby guiding the rotation of the second trigger member 82.

[0075] like Figures 8-11As shown, the handle component 7 includes a fitting 72 and a handle 71. The fitting 72 includes a first driving portion 721, a second fitting portion 722, a second through hole 723 and a second mounting portion 724. The handle 71 includes a second driving portion 711, a first fitting portion 712, a first through hole 713, a first mounting portion 714 and a gripping portion 715, wherein the gripping portion 715 is used for hand-held operation by a doctor. A rotating shaft 76 is passed through 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 passed through the second through hole 723, so that the fitting 72 and the handle 71 are pivotally connected to each other. In this embodiment, the handle component 7 further includes a first biasing member, which is configured to apply a biasing force to the fitting member 72 to cause it to move in the second direction. Therefore, after the doctor drives the handle 71 to move in the first direction, the doctor releases the handle 71, and under the action of the biasing force of the first biasing member, the handle 71 is driven to move in the second direction and reset. Figure 1 As shown, the first biasing member is a return spring 74 , one end of the return spring 74 is fixed to the second mounting portion 724 , and the other end of the return spring 74 is fixed to the housing of the stapler via a spring fixing member 77 .

[0076] like Figures 9-11 As shown, the handle component 7 also includes a limit member 75 and a second biasing member, and the second biasing member is configured to apply a biasing force to the handle 71 so that it moves in a first direction relative to the mating member 72. The limit member 75 is arranged below the initial position of the mating member 72. The limit member 75 is, for example, a limit pin or a limit protrusion fixed on the housing of the anastomosis device. The limit member 75 is configured to block the mating member 72 from moving in a second direction from the initial position. The second biasing member is installed between the mating member 72 and the handle 71, and provides a biasing force to the mating member 72 and the handle 71 respectively to keep them in the initial mating state. The second biasing member is a torsion spring 73, which is sleeved on the outside of the first mounting portion 714, and the two legs of the torsion spring 73 are respectively against the handle 71.

[0077] Figure 12 and Figure 13 The structure of the handle component 7 in three states is shown. The state when the handle component 7 is not operated by the doctor is defined as the initial state, in which the handle 71 is located at its initial position 71a and the fitting 72 is located at its initial position 72a. Figure 12 As shown, the doctor holds the handle 71 so that the handle 71 moves in a first direction ( Figure 12When the handle 71 is rotated (in the middle R1 direction), the handle 71 moves to the first position 71b. Simultaneously, the first engaging portion 712 drives the second engaging portion 722 to rotate in the first direction, causing the engaging portion 72 to move to the second position 72b. The second mounting portion 724 engages with the return spring 74, causing the return spring 74 to be stretched and elastically deformed, and the handle component 7 enters the first state. At this time, the doctor releases the handle component 7. Under the biasing force of the return spring 74, the engaging portion 72 moves in the second direction and returns to its initial position 72a. The first engaging portion 712 drives the second engaging portion 722 to rotate in the second direction, causing the handle 71 to move in the second direction and return to its initial position 71a. The handle component 7 returns to its initial state.

[0078] like Figure 13 As shown, the doctor lifts the handle 71 upward so that the handle 71 moves in the second direction ( Figure 13 When the handle 71 is rotated in the second direction (in the R2 direction), the handle 71 moves in the second direction to the second position 71c. At this time, under the stopping action of the limiter 75, the mating member 72 remains in its initial position 72a and does not move. The handle 71 compresses the torsion spring 73, causing it to twist and deform, and the handle component 7 enters the second state. At this time, the doctor releases the handle component 7. Under the biasing force of the torsion spring 73, the handle 71 moves in the first direction relative to the mating member 72 and returns to its initial position 71a, and the handle component 7 returns to its initial state.

[0079] The following combination Figures 14-17 The working principle of the trigger mechanism is introduced in detail.

[0080] like Figure 14 As shown, when the handle component 7 is in the initial state, the handle 71 and the matching member 72 are both in the initial position. At this time, the first driving portion 721 of the matching 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 the doctor holds the gripping portion 715 of the handle 71 and drives the handle 71 to move in the first direction R1, the handle 71 rotates around the rotation axis 76 in the first direction. Figure 15As shown, the engaging member 72 rotates along with the handle 71 in the first direction, stretching the return spring and causing elastic deformation, causing the handle member 7 to enter the first state. The first driving portion 721 drives the third driving portion 812, causing the first trigger member 81 to rotate about the first pivot portion 811. The rotation direction of the first trigger member 81 is opposite to that 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, triggering the first switch 51. The first switch 51 sends a first trigger signal to the controller, which in turn sends a first start signal to the motor 21. The motor 21 starts forward rotation, driving the actuator 3 distally via the gear train 22, thus closing the staple cartridge assembly. After the staple cartridge assembly is closed, under the action of the firing safety switch 53, even if the physician grips the handle 71 again, causing the first trigger member 81 to trigger the first switch 51, the controller will not send the first start signal to the motor 21. After the doctor is ready to fire, he presses the firing safety member 6, triggering the firing safety switch 53. The firing safety switch 53 sends a third trigger signal to the controller. The doctor then drives the handle 71 in the first direction again, which drives the first trigger member 81 to rotate through the mating member 72 and triggers the first switch 51. The first switch 51 sends the first trigger signal to the controller, which sends the first start signal to the motor 21. The motor 21 starts to rotate forward and drives the actuator 3 in the distal direction through the gear set 22, driving the staple cartridge assembly to complete the firing. The doctor releases the handle 71, and the elastic deformation restoring force of the return spring causes the mating member 72 and handle 71 to return to their initial positions.

[0081] like Figure 16 As shown, after the stapler is fired, the handle member 7 is in the initial state, the second driving portion 711 of the handle 71 does not act on the fourth driving portion 822 of the second trigger member 82, and the second trigger portion 824 of the second trigger member 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, causing the handle 71 to rotate along the second direction R2. Figure 17As shown, under the action of the limiter 75, the mating member 72 remains in its initial position and does not move. The torsion spring is compressed and deformed by the handle 71, and the handle component 7 enters the second state. The second drive unit 711 drives the fourth drive unit 822, causing the second trigger member 82 to rotate about the second pivot portion 821. The rotation direction of the second trigger member 82 is opposite to the rotation direction of the second drive unit 711, that is, the second trigger member 82 rotates in the first direction. The second trigger unit 824 triggers the second trigger position 521 of the second switch 52. The second switch 52 sends a second trigger signal to the controller, which sends a second start signal to the motor 21. The motor 21 starts to reverse and drive the actuator 3 to retract in the proximal direction, thereby driving the jaws of the staple cartridge assembly to open. At this time, the doctor releases the handle 71. Under the biasing force of the torsion spring, the handle 71 moves in the first direction relative to the mating member 72 and returns to its initial position.

[0082] The above embodiments are described using the example of a first biasing member being a return spring and a second biasing member being a torsion spring, but the present application is not limited thereto. The first biasing member and the second biasing member may also be other types of elastic members as needed. For example, the first biasing member may be a compression spring, a torsion spring, a spring, etc., and the second biasing member may be a compression spring, a tension spring, a spring, etc., all of which fall within the scope of protection of the present application. In the above embodiments, the first switch, the second switch, and the trigger safety switch may each be implemented using a micro switch, but the present application is not limited thereto. Other types of switches that can be triggered by corresponding triggering portions and send signals to the controller may also be used. The first switch and the second switch may be two independent switch devices, or the first switch and the second switch may be implemented using the same switch device, which has two trigger positions. When one trigger position is triggered, a first trigger signal is sent to the controller, and the portion of the switch device corresponding to the trigger position functions as the first switch. When the other trigger position is triggered, a second trigger signal is sent to the controller, and the portion of the switch device corresponding to the trigger position functions as the second switch.

[0083] The above content is a further detailed description of the present application in conjunction with specific preferred embodiments, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered to fall within the scope of protection of the present application.

Claims

1. A trigger mechanism, characterized in that: For an electric stapler, the trigger mechanism comprises: a first switch and a second switch, respectively located on two lateral sides of the axis of the electric stapler, wherein the first switch is configured to activate the actuator of the electric stapler to move in a distal direction when triggered, and the second switch is configured to activate the actuator of the electric stapler to move in a proximal direction when triggered; The handle component includes a first driving portion and a second driving portion; a first trigger member and a second trigger member; When the first driving part is driven to move in a first direction, it drives the first triggering member to move so that the first triggering member triggers the first switch; when the second driving part is driven to move in a second direction, it drives the second triggering member to move so that the second triggering member triggers the second switch.

2. The trigger mechanism according to claim 1, characterized in that: The first trigger member includes a first pivot portion, and the second trigger member includes a second pivot portion. The first pivot portion and the second pivot portion are rotatably mounted on two lateral sides of the frame of the electric stapler.

3. The trigger mechanism according to claim 2, characterized in that: A third driving portion is provided on a first side of the first pivoting portion, and a first triggering portion is provided on a second side of the first pivoting portion, wherein the third driving portion is configured to be driven by the first driving portion to move so that the first triggering portion triggers the first switch; A fourth driving portion is provided on a first side of the second pivoting portion, a second triggering portion is provided on a second side of the second pivoting portion, and the fourth driving portion is configured to be driven by the second driving portion to move so that the second triggering portion triggers the second switch.

4. The trigger mechanism according to claim 3, characterized in that: A first limiting portion is further provided on the second side of the first trigger member, and the limiting portion is at least partially located between the first switch and the frame; A second limiting portion is further provided on the second side of the second trigger member, and the limiting portion is at least partially located between the second switch and the frame.

5. The trigger mechanism according to claim 1, characterized in that: The handle component includes a matching piece and a handle, the matching piece includes the first driving portion, and the handle includes the second driving portion. When the handle is driven to move along the first direction, it drives the matching piece to move along the first direction.

6. The trigger mechanism according to claim 5, characterized in that: The handle component further includes a first biasing member configured to apply a biasing force to the mating member to cause it to move along the second direction.

7. The trigger mechanism according to claim 5, characterized in that: The handle component further includes a limiter and a second biasing member, wherein the limiter is configured to block the mating member from moving along the second direction from an initial position, and the second biasing member is configured to apply a biasing force to the handle to cause it to move relative to the mating member along the first direction.

8. The trigger mechanism according to claim 1, characterized in that: The first switch and the first driving part are respectively at least partially located on both sides of the first triggering member in the longitudinal direction, and the second switch and the second driving part are respectively at least partially located on both sides of the second triggering member in the longitudinal direction.

9. A firing assembly, characterized in that: comprising a power mechanism, an actuating mechanism, a controller, and a trigger mechanism according to any one of claims 1 to 8; The controller is configured to send a first start signal to the power mechanism upon receiving a signal that the first switch is triggered, and to send a second start signal to the power mechanism upon receiving a signal that the second switch is triggered; The power mechanism is configured to drive the actuating mechanism to move in a distal direction upon receiving the first activation signal, and to drive the actuating mechanism to move in a proximal direction upon receiving the second activation signal.

10. An electric stapler, characterized in that: Comprising the trigger mechanism according to any one of claims 1 to 8 or the firing assembly according to claim 9.

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