Triggering mechanism, percussion assembly and electric anastomat

Abstract

The invention 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] This application relates to the field of medical device technology, specifically to a triggering mechanism, a firing assembly, and an electric stapler. Background Technology

[0002] Electric staplers are surgical instruments used for tissue anastomosis and resection. They typically employ a sophisticated mechanical structure to clamp and cut tissue and are widely used in surgical procedures. An electric stapler generally includes an instrument platform and a staple cartridge assembly connected to the distal end of the instrument platform. The instrument platform houses a firing assembly, which includes an actuator, a motor, and a start button. The start button has a first button for forward rotation and a second button for reverse rotation. When the motor is activated in forward rotation, it drives the actuator to move distally, closing and firing the staple cartridge assembly. When the motor is activated in reverse rotation, it retracts proximally, opening the jaws of the staple cartridge assembly. During surgery, the firing assembly first closes the jaws of the staple cartridge assembly to clamp the tissue. Then, the actuator continues to drive the staple cartridge assembly to perform cutting and suturing actions. After the stapler fires, the actuator retracts to open the jaws of the staple cartridge assembly.

[0003] In practical applications, surgical scenarios are complex and varied. During the operation, doctors often need to repeatedly adjust the position of the electric stapler. However, the existing technology uses a start button to control the motor, which can be confusing due to the different buttons. Furthermore, different operating methods can be confused when doctors hold the instruments in different ways, which can easily lead to errors by doctors and affect the normal progress of the operation. Summary of the Invention

[0004] To address the problems in the prior art, the purpose of this application is to provide a triggering mechanism, firing assembly, and electric stapler. By moving the handle component in different directions, different trigger elements are driven, thereby triggering different start switches. The use of the handle component is more in line with the operating habits of doctors and is less likely to cause misoperation.

[0005] This application provides a triggering mechanism for an electric stapler, the triggering mechanism comprising: a first switch and a second switch, respectively located on opposite sides of the axis of the electric stapler; the first switch being configured to, when triggered, activate the actuation mechanism of the electric stapler to move distally; the second switch being configured to, when triggered, activate the actuation mechanism of the electric stapler to move proximally; a handle component comprising a first driving part and a second driving part; a first triggering element and a second triggering element; wherein, when the first driving part is driven to move along a first direction, it drives the first triggering element to move, thereby triggering the first switch; when the second driving part is driven to move along a second direction, it drives the second triggering element to move, thereby triggering the second switch.

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

[0007] In some embodiments, a third driving part is provided on a first side of the first pivot portion, and a first trigger part is provided on a second side of the first pivot portion. 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 fourth driving part is provided on a first side of the second pivot portion, and a second trigger part is provided on a second side of the second pivot portion. 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.

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

[0009] In some embodiments, the handle component includes a mating part and a handle, the mating part includes a first driving part, the handle includes a second driving part, and the handle is configured to drive the mating part to move in the first direction when it is driven to move in 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, causing it to move in the second direction.

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

[0012] In some embodiments, the first switch and the first drive portion are at least partially located on both longitudinal sides of the first trigger, and the second switch and the second drive portion are at least partially located on both longitudinal sides of the second trigger.

[0013] A second aspect of this application provides a firing assembly, including a power mechanism, an actuation mechanism, a controller, and the triggering 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 actuation mechanism to move in a distal direction when receiving the first start signal, and to drive the actuation mechanism to move in a proximal direction when receiving the second start signal.

[0014] A third aspect of this application provides an electric stapler, including the triggering mechanism described in the first aspect or the firing assembly described in the second aspect.

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

[0016] This application provides a triggering mechanism for activating a stapler for surgical operations. By moving the handle component in different directions, different trigger elements are driven, thereby triggering different start switches to realize the closing, firing, and retraction actions of the electric stapler. The use of the electric stapler handle component is more in line with the doctor's operating habits and is less likely to cause misoperation, thus improving surgical safety and ease of use. Attached Figure Description

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

[0018] Figure 1 This is a partial side view of the instrument platform of an electric stapler according to an embodiment of this application;

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

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

[0021] Figure 4 This is a schematic diagram illustrating the interaction between a trigger safety element and a trigger safety switch according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the first trigger element cooperating with the first switch according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of the second trigger element according to an embodiment of this application;

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

[0025] Figure 8 This is a partial perspective view of a triggering mechanism according to an embodiment of this application;

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

[0027] Figure 10 This is a schematic diagram of the engagement of a handle and a mating component according to an embodiment of this application;

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

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

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

[0031] Figure 14 This is a schematic diagram of the first side of the triggering mechanism when the handle component is in its initial state according to an embodiment of this application;

[0032] Figure 15 This is a schematic diagram of the first side of the triggering mechanism when the handle component is in the first state according to an embodiment of this application;

[0033] Figure 16 This is a schematic diagram of the second side of the triggering mechanism when the handle component is in its initial state according to an embodiment of this application;

[0034] Figure 17 This is a schematic diagram of the second side of the triggering mechanism when the handle component is in the second state according to an embodiment of this application.

[0035] Figure label:

[0036] 11 Rack 714 First Installation Section

[0037] 12 Connecting rod 715 Grip section

[0038] 2. Power mechanism 72 mating parts

[0039] 21 Motor 721 First Drive Unit

[0040] 22 Gear Set 722 Second Mating Part

[0041] 221 First gear 723 Second through hole

[0042] 222 Second Gear 724 Second Mounting Part

[0043] 3 Actuator 73 Torsion Spring

[0044] 31 Tooth surface 74 Return spring

[0045] 51 First switch 75 Limiting element

[0046] 511 First trigger position 76 Rotation axis

[0047] 52 Second switch 77 Spring retainer

[0048] 521 Second trigger position 81 First trigger

[0049] 53 Triggering safety switch 811 First pivot section

[0050] 531 Third trigger position 812 Third drive unit

[0051] 54 Circuit Board 813 First Limiting Part

[0052] 6. Activation safety element 814, first trigger section

[0053] 61 Rod section 815 First guide section

[0054] 62 Third trigger part 82 Second trigger element

[0055] 7 Handle component 821 Second pivot part

[0056] 71 Handle 822 Fourth Drive Unit

[0057] 711 Second drive unit 823 Second limit unit

[0058] 712 First Coordination Unit 824 Second Trigger Unit

[0059] 713 First through hole 825 Second guide section Detailed Implementation

[0060] 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.

[0061] This application provides a triggering mechanism, a firing assembly, and an electric stapler. The electric stapler includes an instrument platform and a staple cartridge assembly connected to the distal end of the instrument platform. The instrument platform includes a housing and a firing assembly located at least partially inside the housing. The firing assembly includes a power mechanism, an actuation mechanism, a controller, and a triggering mechanism. The triggering mechanism includes: a first switch and a second switch, respectively located on opposite sides of the axis of the electric stapler; a handle component including a first drive portion and a second drive portion; and a first trigger and a second trigger.

[0062] When the first drive unit is driven to move along a first direction, it drives the first trigger member to move, causing the first trigger member to trigger the first switch. The first switch is configured to, when triggered, activate the actuation mechanism of the electric stapler to move in the distal direction, thereby completing the closing and firing actions of the electric stapler. When the second drive unit is driven to move along a second direction, it drives the second trigger member to move, causing the second trigger member to trigger the second switch. The second switch is configured to, when triggered, activate the actuation mechanism of the electric stapler to move in the proximal direction, thereby completing the retraction action of the electric stapler.

[0063] Therefore, in this application, different triggers are driven by the different directional movements of the handle component, thereby triggering different start switches to realize the closing, firing and retraction actions of the electric stapler respectively. The use of the handle component is more in line with the doctor's operating habits, and the two operating methods of the handle component are not easy to cause confusion, regardless of whether the doctor holds the handle component with the right hand or the left hand, thus reducing the risk of misoperation and improving surgical safety and ease of use.

[0064] The structure of the triggering mechanism of various specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the various specific embodiments are not intended to limit the scope of protection of this application. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. In this application, "distal" and "proximal" are relative to the operator; the end closer to the operator is the proximal end, and the end farther from the operator, i.e., closer to the surgical position, is the distal end. The direction along the axis of the stapler is the axial direction, i.e., the direction from the distal end to the proximal end of the stapler, or the direction 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, direction S1 is the direction from the proximal end to the distal end. Lateral refers to the width direction of the stapler, i.e., in... Figure 1 and Figure 2 The direction perpendicular to the paper is... Figure 8 The S2 direction in the diagram. Longitudinal refers to the height direction of the stapler, i.e., in... Figure 1 and Figure 2 The vertical direction within. The axis refers to the axis of the long axis portion of the stapler cartridge assembly and instrument platform, for example... Figure 1 The axis of the connecting rod 12.

[0065] Figure 1 and Figure 2 A partial side view of the instrument platform of an electric stapler according to an embodiment of this application is shown. The instrument platform of the electric stapler includes a housing (not shown), 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). The firing assembly and the frame 11 are at least partially located inside the housing. The firing assembly includes a power mechanism 2, an actuation mechanism, a controller, and a triggering mechanism. The triggering mechanism includes a first switch 51, a second switch 52, a handle component 7, a first trigger 81, and a second trigger 82. The handle component 7 is rotatably mounted to the housing of the electric stapler such 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 actuation mechanism includes an actuator 3 extending axially along the anastomosis device, and the actuator 3 includes a tooth surface 31 that meshes 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 mounted on a circuit board 54. A first switch 51 and a second switch 52 are respectively connected to the circuit board 54 and electrically connected to the controller via wiring on the circuit board 54.

[0067] The handle component 7 can be driven to rotate at least partially along a first direction and along a second direction. The first direction is opposite to the second direction. In this embodiment, the first direction is... Figure 3 The first direction is clockwise, that is, towards the direction closest to motor 21; the second direction is... Figure 3 The direction is counterclockwise, that is, away from the motor 21. When the doctor holds the electric stapler and presses the handle component 7, the handle component 7 is driven to rotate at least partially in the first direction. The first drive unit 721 moves in the first direction, driving the first trigger member 81 to move and triggering the first switch 51. The first switch 51 is configured to send a first trigger signal to the controller when triggered. When the controller receives the first trigger signal, it sends a first start signal to the motor 21 of the power mechanism 2. When the motor 21 receives the first start signal, it 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 suture 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 7 upward, the handle 7 is driven to rotate at least partially in the second direction. The second drive unit 711 then moves in the second direction, driving the second trigger 82 to move and triggering 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, driving the actuator 3 to move in the proximal direction, thereby completing the retraction action of the electric stapler. The jaws of the staple cartridge assembly are opened by the actuator mechanism.

[0069] Therefore, in this application, different trigger elements are driven by the different directional movements of the handle component 7, thereby triggering different start switches to realize the closing, firing, and retraction actions of the electric stapler, respectively. The use of the handle component 7 is more in line with the operating habits of doctors, improving ease of use. Since the operation methods of the first and second directional movements of the handle component 7 are very different, the operation method of the handle component 7 remains unchanged for doctors, whether they hold the instrument with their right or left hand. The operations of pressing and lifting the handle component 7 are not easily confused, thus reducing the risk of misoperation and improving surgical safety.

[0070] The movement positions of actuator 3 include: an initial position when not driven, a closed position where the jaws of the staple cartridge assembly are closed after moving towards the distal end, and a firing completion position where the stapler is fired. For example... Figure 3 and Figure 4As shown, the triggering mechanism also includes a firing safety element 6 and a firing safety switch 53. The firing safety switch 53 is configured to prevent the actuator 3 from moving distally when it is not triggered and the actuator 3 is in the closed position. The firing safety element 6 is configured to trigger the firing safety switch 53 when it is actuated. In this embodiment, the firing safety element 6 includes a rod 61 that extends laterally, with its first and second ends at least partially protruding from both sides of the housing to facilitate the doctor's pressing operation. The rod 61 can be pressed and moved axially. Two third trigger parts 62 are provided between the first and second ends of the rod 61, and a cavity is provided between the two third trigger parts 62. In the initial state, the third trigger position 531 of the safety switch 53 is located inside the cavity between the two third trigger parts 62, and the safety switch 53 will not be 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 component 7, triggering the first switch 51, the controller will receive the first trigger signal but will not send the first start signal to the motor 21. The motor 21 cannot drive the actuator 3 to fire the stapler, thus avoiding misoperation by the doctor when not properly prepared for surgery, further improving the safety of the surgery. After the doctor is fully prepared for surgery, he presses one end of the lever 61 of the safety switch 6, causing the lever 61 to move laterally. One of the third trigger parts 62 contacts the third trigger position 531 of the safety switch 53 and triggers the safety switch 53. The safety switch 53 sends a third trigger signal to the controller. Only after receiving the third trigger signal does the controller consider the safety switch to be released. At this time, the doctor presses the handle component 7 again, and the controller receives the first trigger signal sent by the first switch 51 again, and then sends the first start signal to the motor 21.

[0071] like Figures 5-9As shown, the first switch 51 and the second switch 52 are located on the lateral sides of the axis of the electric stapler. The first switch 51 and the first drive unit 721 are at least partially located on the longitudinal sides of the first trigger member 81. For example, the first switch 51 is at least partially located on the upper side of the first trigger member 81, and the first drive unit 721 is at least partially located on the lower side of the first trigger member 81. The second switch 52 and the second drive unit 711 are at least partially located on the longitudinal sides of the second trigger member 82. For example, the second switch 52 is at least partially located on the upper side of the second trigger member 82, and the second drive unit 711 is at least partially located on the lower side of the second trigger member 82. Therefore, this embodiment rationally arranges the positional relationship of the various components of the triggering mechanism, setting the first switch 51 and the second switch 52 on the lateral sides of the axis, and arranging the switches, corresponding trigger members, and corresponding drive units longitudinally. This rational arrangement of the triggering mechanism layout reduces the space occupied by the triggering mechanism, which is beneficial for miniaturizing and lightening the instrument platform of the electric stapler. Optionally, the first switch 51 and the second switch 52 are aligned laterally to improve the symmetry and stability of the overall structure and further reduce the overall volume of the instrument platform. However, this application is not limited to this; the first switch 51 and the second switch 52 may also be arranged one in front of the other in the axial direction, and / or the first switch 51 and the second switch 52 may also be arranged at different heights, which also falls within the protection scope of this application.

[0072] The first trigger 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 the first side of the first pivot portion 811, and the first trigger portion 814 is located on the second side of the first pivot portion 811. The second trigger 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 the first side of the second pivot portion 821, and the second trigger portion 824 is located on the second side of the second pivot portion 821. The first pivot portion 811 and the second pivot portion 821 are rotatably mounted on the transverse sides of the frame 11 of the electric stapler, such that when the first trigger 81 is driven by the first drive portion 821, it can rotate around the first pivot portion 811, thereby changing the position of the first trigger portion 814; and when the second trigger 82 is driven by the second drive portion 711, it can rotate around 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 laterally. Optionally, the first pivot portion 811 and the second pivot portion 821 are aligned laterally. The first pivot portion 811 and the second pivot portion 821 can be mounted on the housing of the anastomosis device using a single long pivot shaft, or they can be mounted on the housing of the anastomosis device using two short pivot shafts. This structure is beneficial for improving the symmetry and stability of the overall structure and further for reducing the overall volume of the instrument platform. However, this application is not limited to this; the first pivot portion 811 and the second pivot portion 821 can also be arranged one in front of 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 protection scope of this application.

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

[0074] like Figure 7 As shown, a first limiting part 813 is also provided on the second side of the first trigger 81. The first limiting part 813 is at least partially located between the first switch 51 and the frame 11 (shown in the diagram). Figure 1The second trigger 82 is further limited on its position to prevent undesirable lateral movement. A second limiting portion 823 is also provided on the second side of the second trigger 82, which is at least partially located between the second switch 52 and the frame 11 (shown in [location missing]). Figure 2 The first limiting part 813 and the second limiting part 823 further limit the position of the second trigger 82, preventing undesirable lateral movement of the second trigger 82. The overall structural stability of the instrument platform can be further improved through the first limiting part 813 and the second limiting part 823. Furthermore, the contact surfaces of the first limiting part 813 and the first switch 51, and the first limiting part 813 and the frame 11, can have a certain amount of friction, holding the first trigger 81 in its initial position. Even if the instrument platform vibrates when the doctor is not operating the handle part 7, the first trigger 81 is unlikely to rotate, thus preventing accidental firing of the stapler. Similarly, the contact surfaces of the second limiting part 823 and the second switch 52, and the second limiting part 823 and the frame 11, can also have a certain amount of friction, holding the second trigger 82 in its initial position. Even if the instrument platform vibrates when the doctor is not operating the handle part 7, the second trigger 82 is unlikely to rotate, thus preventing accidental firing of the stapler. The first trigger 81 is further provided with a first guide portion 815 on its first side, which is, for example, a protruding pillar structure. The second trigger 82 is further provided with a second guide portion 825 on its second side, which is, for example, a protruding pillar structure. An arc-shaped first guide groove and an arc-shaped second guide groove may also be provided on the housing or frame of the stapler. When the first trigger 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 81 rotates in the second direction, the first guide portion 815 moves in the first guide groove along its arc-shaped extension direction, thereby providing guidance for the rotational movement of the first trigger 81. When the second trigger 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 82 rotates in the first direction, the second guide portion 825 moves in the second guide groove along its arc-shaped extension direction, thereby providing guidance for the rotational movement of the second trigger 82.

[0075] like Figures 8-11As shown, the handle component 7 includes a mating part 72 and a handle 71. The mating part 72 includes a first drive portion 721, a second mating portion 722, a second through hole 723, and a second mounting portion 724. The handle 71 includes a second drive portion 711, a first mating portion 712, a first through hole 713, a first mounting portion 714, and a grip portion 715, which is used by the doctor for hand operation. A rotating shaft 76 passes 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 passes through the second through hole 723, so that the mating part 72 and the handle 71 are pivotally connected to each other. In this embodiment, the handle component 7 further includes a first biasing member configured to apply a biasing force to the mating component 72, causing it to move in a second direction. Therefore, after the handle 71 is driven by the doctor to move in the first direction, the doctor releases the handle 71, and under the biasing force of the first biasing member, the handle 71 is driven to move in the second direction and reset. In this embodiment, as... 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 part 724, and the other end of the return spring 74 is fixed to the housing of the anastomosis device by a spring fixing member 77.

[0076] like Figures 9-11 As shown, the handle component 7 also includes a limiting member 75 and a second biasing member, the second biasing member being configured to apply a biasing force to the handle 71, causing it to move relative to the mating member 72 in a first direction. The limiting member 75 is located below the initial position of the mating member 72. The limiting member 75 is, for example, a limiting pin or limiting protrusion fixed to the housing of the stapler. The limiting member 75 is configured to prevent the mating member 72 from moving from the initial position in a second direction. The second biasing member is mounted between the mating member 72 and the handle 71, providing biasing forces to the mating member 72 and the handle 71 respectively, maintaining them in their initial mating state. The second biasing member is a torsion spring 73, which is sleeved outside the first mounting portion 714, with its two legs abutting against the handle 71.

[0077] Figure 12 and Figure 13 The structure of the handle component 7 in three states is shown. Here, the initial state is defined as the state when the handle component 7 is not being operated by the doctor, at which time the handle 71 is in its initial position 71a, and the mating part 72 is in its initial position 72a. For example... Figure 12 As shown, the doctor holds the handle 71 such that the handle 71 moves along the first direction ( Figure 12When the handle 71 is rotated in the R1 direction, it moves to the first position 71b. Simultaneously, the first mating part 712 drives the second mating part 722 to rotate in the first direction, causing the mating part 72 to move to the second position 72b. The second mounting part 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, when the doctor releases the handle component 7, under the biasing force of the return spring 74, the mating part 72 moves in the second direction to return to its initial position 72a. The first mating part 712 drives the second mating part 722 to rotate in the second direction, causing the handle 71 to move in the second direction to return to its initial position 71a, and the handle component 7 returns to its initial state.

[0078] like Figure 13 As shown, the doctor lifts the handle 71 upwards so that the handle 71 moves in the second direction ( Figure 13 When rotated in the R2 direction, the handle 71 moves to the second position 71c along the second direction. At this time, under the stop action of the limiting member 75, the mating member 72 remains in its initial position 72a without movement. The handle 71 compresses the torsion spring 73 and undergoes torsional deformation, and the handle component 7 enters the second state. At this time, the doctor releases the handle component 7, and under the biasing force of the torsion spring 73, the handle 71 moves relative to the mating member 72 along the first direction and returns to its initial position 71a, and the handle component 7 returns to its initial state.

[0079] The following is combined with Figures 14-17 This section provides a detailed explanation of how the triggering mechanism works.

[0080] like Figure 14 As shown, when the handle component 7 is in its initial state, both the handle 71 and the mating part 72 are in their initial positions. At this time, the first driving part 721 of the mating part 72 does not act on the third driving part 812 of the first trigger 81. The first trigger part 814 does not act on the first trigger position 511 of the first switch 51. When the doctor holds the gripping part 715 of the handle 71 and drives the handle 71 to move along the first direction R1, the handle 71 rotates around the rotation axis 76 along the first direction. Figure 15As shown, the mating part 72 rotates along the handle 71 in the first direction, the return spring is stretched and undergoes elastic deformation, and the handle part 7 enters the first state. The first drive part 721 drives the third drive part 812, causing the first trigger 81 to rotate around the first pivot part 811. The rotation direction of the first trigger 81 is opposite to the rotation direction of the first drive part 721, that is, the first trigger 81 rotates along the second direction. The first trigger part 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, the controller sends a first start signal to the motor 21, the motor 21 starts to rotate forward and drives the actuator 3 to move in the distal direction through the gear set 22, driving the staple cartridge assembly to complete the closure. After the staple cartridge assembly completes the closure, under the action of the safety switch 53, even if the doctor holds the handle 71 again and causes the first trigger 81 to trigger the first switch 51, the controller will not send the first start signal to the motor 21. After the doctor prepares to fire, they press the firing safety 6, triggering the firing safety switch 53. The firing safety switch 53 sends a third trigger signal to the controller. At this time, the doctor again drives the handle 71 to move in the first direction, which drives the first trigger 81 to rotate through the mating part 72, triggering the first switch 51. The first switch 51 sends a first trigger signal to the controller, which sends a first start signal to the motor 21. The motor 21 starts rotating forward and drives the actuator 3 to move 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 under the elastic deformation and restoring force of the return spring, the mating part 72 and the handle 71 return to their initial positions.

[0081] like Figure 16 As shown, after the stapler is fired, the handle component 7 is in its initial state. The second drive part 711 of the handle 71 is not activated by the fourth drive part 822 of the second trigger member 82, and the second trigger part 824 of the second trigger member 82 is not activated by the second trigger position 521 of the second switch 52. At this time, the doctor lifts the handle 71 upwards, causing the handle 71 to rotate along the second direction R2. Figure 17As shown, under the action of the limiting member 75, the mating member 72 remains stationary in its initial position, 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 around the second pivot part 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 along 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, the controller sends a second start signal to the motor 21, the motor 21 starts the reverse drive 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, and under the biasing force of the torsion spring, the handle 71 moves relative to the mating member 72 along the first direction and returns to its initial position.

[0082] The above embodiments use a return spring as the first biasing element and a torsion spring as the second biasing element for illustration, but this application is not limited to this. The first and second biasing elements can also be selected as other types of elastic elements as needed. For example, the first biasing element can be a compression spring, torsion spring, or spring sheet, and the second biasing element can be a compression spring, tension spring, or spring sheet, all of which fall within the protection scope of this application. In the above embodiments, the first switch, second switch, and trigger safety switch can be implemented using microswitches, but this application is not limited to this. Other types of switches that can be triggered by corresponding triggering parts and send signals to the controller can also be used. The first switch and the second switch can be two independent switching devices, or the first switch and the second switch can be implemented using the same switching device. This switching device has two trigger positions. When one trigger position is triggered, a first trigger signal is sent to the controller, and the part of the switching device corresponding to this trigger position serves as the first switch. When the other trigger position is triggered, a second trigger signal is sent to the controller, and the part of the switching device corresponding to this trigger position serves as the second switch.

[0083] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A trigger mechanism, characterized by The trigger mechanism comprises: a first switch and a second switch, which are respectively located on the two sides of the shaft center of the electric anastomat, the first switch is configured to be triggered to start the actuating mechanism of the electric anastomat to move in the distal direction, and the second switch is configured to be triggered to start the actuating mechanism of the electric anastomat to move in the proximal direction; a handle component, which comprises a first driving part and a second driving part; a first trigger and a second trigger; wherein the first driving part is driven to move in the first direction, the first trigger is driven to move, and the first trigger triggers the first switch; the second driving part is driven to move in the second direction, the second trigger is driven to move, and the second trigger triggers the second switch.

2. The trigger mechanism of claim 1, wherein, The first trigger comprises a first pivot part, and the second trigger comprises a second pivot part, the first pivot part and the second pivot part are respectively rotatably installed on the two sides of the frame of the electric anastomat.

3. The trigger mechanism of claim 2, wherein, 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 trigger part, the third driving part is configured to be driven to move by the first driving part, and the first trigger part triggers the first switch; 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 trigger part, the fourth driving part is configured to be driven to move by the second driving part, and the second trigger part triggers the second switch.

4. The trigger mechanism of claim 3, wherein, The second side of the first trigger is further provided with a first limiting part, and the limiting part is at least partially located between the first switch and the frame; The second side of the second trigger is further provided with a second limiting part, and the limiting part is at least partially located between the second switch and the frame.

5. The trigger mechanism of claim 1, 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, and the fitting part is driven to move in the first direction.

6. The trigger mechanism of claim 5, wherein, 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 to move in the second direction.

7. The trigger mechanism of claim 5, 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.

8. The trigger mechanism of claim 1, wherein, The first switch and the first driving part are respectively at least partially located on the two longitudinal sides of the first trigger, and the second switch and the second driving part are respectively at least partially located on the two longitudinal sides of the second trigger.

9. A firing assembly comprising: The trigger mechanism comprises: 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 actuation mechanism in a distal direction upon receipt of the first firing signal and to drive the actuation mechanism in a proximal direction upon receipt of the second firing signal.

10. An electrically powered anastomosis device, comprising: including the firing mechanism of any of claims 1-8 or the firing assembly of claim 9.

Images