Triggering mechanism, percussion assembly and electric anastomat

Abstract

The utility model provides a triggering mechanism, a percussion assembly and an electric anastomat, the electric anastomat comprises an actuating piece, the triggering mechanism comprises a first control switch, a second control switch, a first transmission piece, a second transmission piece and a handle, the second control switch and the first control switch are arranged in the axial direction of the anastomat, and the second control switch is arranged in the axial direction of the second transmission piece. The handle comprises a first driving part and a second driving part; when the first driving part is driven to move in the first direction, the first control switch is triggered through the first transmission piece, so that the first control switch triggers the actuating piece to move in the far-end direction. When the second driving part is driven to move in the second direction, the second control switch is triggered through the second transmission piece, so that the second control switch triggers the actuating piece to move towards the near end. The trigger mechanism is convenient to use and has high structural stability and working reliability.

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. It generally achieves tissue clamping and cutting through a precise mechanical structure and is widely used in surgical operations. An electric stapler generally includes an instrument platform and a stapler assembly connected to the distal end of the instrument platform. The instrument platform is equipped with a firing assembly, which includes an actuator rod, a motor, and a start button. The start button includes a first button that drives the motor forward and a second button that drives the motor reverse. During surgery, the doctor first presses the first button to start the motor forward. The motor drives the actuator rod forward and drives the jaws of the stapler assembly to close to clamp the tissue. The actuator rod then continues to drive the stapler assembly to perform cutting and suturing. After the stapler is fired, the doctor presses the second button to start the motor reverse. The motor drives the actuator rod back 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. However, the existing technology uses a start button to control the start of the motor, which can easily cause doctors 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 that are easy to use and have high structural stability and working reliability.

[0005] In a first aspect, the present application provides a trigger mechanism for an electric stapler, wherein the electric stapler includes an actuator, and the trigger mechanism includes a first control switch, a second control switch, a first transmission member, a second transmission member, and a handle, wherein the second control switch and the first control switch are arranged along the axial direction of the stapler, and the handle includes a first drive part and a second drive part; wherein, when the first drive part is driven to move in a first direction, the first control switch is triggered by the first transmission member, so that the first control switch triggers the actuator to move in a distal direction; when the second drive part is driven to move in a second direction, the second control switch is triggered by the second transmission member, so that the second control switch triggers the actuator to move in a proximal direction.

[0006] In some embodiments, the first transmission member and the second transmission member are respectively rotatably mounted on the frame of the stapler.

[0007] In some embodiments, the first transmission member and the second transmission member are arranged along the axial direction.

[0008] In some embodiments, the second control switch is disposed on the proximal side of the first control switch, and the second transmission member is located on the proximal side of the first transmission member.

[0009] In some embodiments, the first driving portion is at least partially located between the first transmission member and the second transmission member, and the second driving portion is at least partially located between the first transmission member and the second transmission member.

[0010] In some embodiments, the handle includes a handle body, which is rotatably connected to the housing of the stapler, and the first driving part and the second driving part are arranged on a side of the handle body facing the first transmission member and the second transmission member.

[0011] In some embodiments, the handle further includes a mating piece, which is rotatably connected to the handle body, and when the handle body is driven to move along the first direction, the mating piece is driven to move along the first direction; the mating piece is connected to a first elastic piece, and is configured to provide the mating piece with an elastic force to cause it to move along the second direction, and a second elastic piece is provided between the mating piece and the handle body.

[0012] In some embodiments, the trigger mechanism further includes a limiting member, the mating member is provided with a stopping groove, the limiting member is at least partially embedded in the stopping groove, and the limiting member blocks the mating member from moving from an initial position along the second direction.

[0013] A second aspect of the present application provides a firing assembly, comprising an actuator, a motor, and the trigger mechanism described in the first aspect, wherein the first control switch and the second control switch are used to control the driving process of the motor on the actuator.

[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] By adopting the present application, a handle for an electric stapler is provided. By driving the handle to move in different directions, different control switches can be triggered respectively through different transmission members, thereby triggering the actuator of the electric stapler to move in the distal direction or the proximal direction, so that the electric stapler can be driven by the handle to perform closing, firing and retraction operations. The use of the handle to drive is more in line with the doctor's operating habits and is more convenient to use. The trigger mechanism has a simple structure and high structural stability. Regardless of whether the stapler is operated with the forehand or backhand, the operating method of the handle remains unchanged and is not prone to misoperation, thereby improving the reliability of the trigger structure. 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 structural diagram of a firing assembly according to an embodiment of the present application;

[0019] Figure 2 This is a second side structural diagram of a firing assembly according to an embodiment of the present application;

[0020] Figure 3 Schematic diagram of the cooperation between a portion of the trigger mechanism and the frame according to an embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the handle in an initial state in accordance with an embodiment of the present application, in cooperation with the transmission member and the control switch;

[0022] Figure 5 This is a schematic diagram of the cooperation between the handle and the torsion spring according to an embodiment of the present application;

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

[0024] Figure 7 This is a schematic diagram of the handle of one embodiment of the present application cooperating with the transmission member and the control switch when pressed;

[0025] Figure 8 This is a schematic diagram of the handle of one embodiment of the present application cooperating with the transmission member and the control switch when the handle is lifted.

[0026] Reference numerals:

[0027] 1 Motor 611 Third drive unit

[0028] 2 Gear set 612 First connection part

[0029] 21 First gear 613 First trigger part

[0030] 22 Second gear 614 First limiter

[0031] 3 Actuating member 62 Second transmission member

[0032] 4 Handle 621 Fourth drive unit

[0033] 41 handle body 622 second connection part

[0034] 411 first driving unit 623 second triggering unit

[0035] 412 second driving portion 624 second limiting portion

[0036] 413 First linkage unit 71 First control switch

[0037] 414 pivot portion 711 first contact

[0038] 415 Handheld part 72 Second control switch

[0039] 42 matching piece 721 second contact

[0040] 421 Second linkage part 81 Trigger safety switch

[0041] 422 spring fixing portion 82 firing safety piece

[0042] 423 retaining groove 91 circuit board

[0043] 43 Install shaft 92 frame

[0044] 51 Torsion spring 93 Limiting piece

[0045] 52 Return spring 94 Spring fixing piece

[0046] 61 First transmission member DETAILED DESCRIPTION

[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. 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. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. "Or" and "or" in the specification may both mean "and" or "or". Although the terms "above", "below", "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 represent certain features, they are only used to represent the function and are not intended to limit the number and importance of specific features.

[0048] The present application provides a trigger mechanism, a firing assembly and an electric stapler. The electric stapler includes an instrument platform and a staple cartridge assembly mounted at the distal end of the instrument platform. The instrument platform includes a housing, a frame 92 (shown in FIG. Figure 3 ) and firing assembly. Figure 1 and Figure 2 The structure of a firing assembly according to an embodiment of the present application is shown. The firing assembly includes an actuator 3, a gear set 2, a circuit board 91, a motor 1, and a trigger mechanism. The actuator 3 extends along the axial direction of the stapler, and a tooth surface is provided on one side surface of the actuator 3. The gear set 2 includes a first gear 21 connected to the output shaft of the motor 1 and a second gear 22 that cooperates with the tooth surface of the actuator 3. A controller (not shown in the figure) is provided on the circuit board 91, and the controller is used to control the start and stop and working direction of the motor 1.

[0049] In this 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 In the perspective of , the left and right directions are the axial directions of the stapler, and the direction from right to left is the direction toward the distal end. Figure 2 In the perspective of , the direction from left to right is the direction toward the far end. Figure 1 and Figure 2 The up and down direction in is the longitudinal direction, that is, the height direction. Figure 3 The W direction is the horizontal direction, that is, the width direction.

[0050] Figure 3The structure of the trigger mechanism and the frame 92 is shown. Figures 1 to 3 As shown, the trigger mechanism includes a first control switch 71, a second control switch 72, a first transmission member 61, a second transmission member 62 and a handle 4. The first control switch 71 and the second control switch 72 are electrically connected to the circuit board 91. The first control switch 71 and the second control switch 72 can be implemented by two switch devices, or the first control switch 71 and the second control switch 72 are two control components in the same switch device. The second control switch 72 and the first control switch 71 are arranged along the axial direction of the stapler, and the first control switch 71 and the second control switch 72 are both arranged on the first side of the frame 92. The second transmission member 62 and the first transmission member 61 are arranged along the axial direction, and the first transmission member 61 and the second transmission member 62 are also both arranged on the first side of the frame 92. The handle 4 includes a handle body 41, which is rotatably connected to the housing of the anastomosis device through a pivot portion 414. A first driving portion 411 is provided on the side of the handle body 41 facing the first transmission member 61, and a second driving portion 412 is provided on the side of the handle body 41 facing the second transmission member 62. The side of the handle body 41 away from the first transmission member 61 and the second transmission member 62 includes a hand-held portion 415 for hand-held operation by a doctor.

[0051] Figure 4 This is a schematic diagram of the handle 4 in the initial state of an embodiment of the present application in conjunction with the transmission member and the control switch. Figures 1 to 4As shown, the first control switch 71 is arranged on the distal side of the second control switch 72, and the first transmission member 61 is arranged on the distal side of the second transmission member 62. The first control switch 71 and the second control switch 72 are aligned in the axial direction, that is, they are at the same height position. The first transmission member 61 and the second transmission member 62 are aligned in the axial direction, that is, they are at the same height position. The first control switch 71, the first transmission member 61 and the handle body 41 are arranged in sequence in the longitudinal direction, and the second control switch 72, the second transmission member 62 and the handle body 41 are arranged in sequence in the longitudinal direction. The first transmission member 61 includes a first connecting portion 612, a first triggering portion 613 and a third driving portion 611. The first connecting portion 612 is rotatably connected to the frame 92. The first triggering portion 613 and the third driving portion 611 are respectively arranged on both sides of the first connecting portion 612. The first triggering portion 613 is disposed on the side of the first transmission member 61 near the first control switch 71, and the third driving portion 611 is disposed on the side of the first transmission member 61 near the first driving portion 411. The second transmission member 62 includes a second connecting portion 622, a second triggering portion 623, and a third driving portion 611. The second connecting portion 622 is rotatably connected to the frame 92, and the second triggering portion 623 and the third driving portion 611 are respectively disposed on either side of the second connecting portion 622. The second triggering portion 623 is disposed on the side of the second transmission member 62 near the second control switch 72, and the third driving portion 611 is disposed on the side of the second transmission member 62 near the second driving portion 412. The first driving portion 411 is at least partially located between the third driving portion 611 and the fourth driving portion 621, and the second driving portion 412 is at least partially located between the third driving portion 611 and the fourth driving portion 621. This fully utilizes the longitudinal space and helps reduce the overall longitudinal footprint of the trigger mechanism. Therefore, the trigger mechanism has a reasonable structural design and position design of each component, and the structural position is reasonably arranged, making full use of the space inside the shell, which is conducive to miniaturization of the electric stapler.

[0052] like Figure 3 As shown, the first transmission member 61 is further provided with a first limiter 614, which is at least partially located between the first control switch 71 and the frame 92 and is used to limit the lateral position of the first transmission member 61, thereby improving the structural stability of the trigger mechanism. The second transmission member 62 is further provided with a second limiter 624, which is at least partially located between the second control switch 72 and the frame 92 and is used to limit the lateral position of the second transmission member 62, thereby improving the structural stability of the trigger mechanism.

[0053] like Figure 4As shown, when the handle 4 is in its initial state, the first driving portion 411 does not act on the first transmission member 61, the first transmission member 61 is in its initial position, the first trigger portion 613 does not contact the first contact 711 of the first control switch 71, the second driving portion 412 does not act on the second transmission member 62, the second transmission member 62 is in its initial position, and the second trigger portion 623 does not contact the second contact 721 of the second control switch 72. At this time, the motor 1 has not started operating, the actuator 3 is in its initial position, and the cartridge assembly is in the open jaws state.

[0054] The first direction and the second direction are opposite directions. Figure 4 From the perspective of the doctor, the first direction is counterclockwise and the second direction is clockwise. When the doctor holds and presses the handle body 41, the first driving portion 411 is driven to move in the first direction, triggering the first control switch 71 through the first transmission member 61, so that the first control switch 71 triggers the actuator 3 to move in the distal direction, thereby achieving the closing and firing action of the stapler. When the doctor holds and lifts the handle body 41, the second driving portion 412 is driven to move in the second direction, triggering the second control switch 72 through the second transmission member 62, so that the second control switch 72 triggers the actuator 3 to move in the proximal direction.

[0055] Therefore, by adopting this trigger mechanism, by driving the handle body 41 to move in different directions, different control switches can be triggered respectively through different transmission parts, thereby triggering the actuator 3 of the electric stapler to move in the distal direction or in the proximal direction, so that the electric stapler can be driven by the handle 4 to perform closing, firing and retraction operations. The use of the handle 4 to drive is more in line with the doctor's operating habits and is more convenient to use. The trigger mechanism has a simple structure and high structural stability. Regardless of whether the stapler is operated with the forehand or backhand, the operation method of the handle 4 remains unchanged. The operations of pressing the handle 4 and lifting the handle 4 are not easy to be confused, so it is not easy to cause misoperation, thereby improving the reliability and safety of the use of the trigger structure.

[0056] like Figure 1 and Figure 2As shown, the trigger mechanism also includes a firing safety switch 81 and a firing safety piece 82. When the actuator 3 moves from its initial position to the closed position in the distal direction, the stapler assembly completes closing. At this time, if the firing safety switch 81 is not triggered, even if the doctor presses the handle body 41 and triggers the first control switch 71 through the first transmission member 61, the actuator 3 cannot continue to move in the distal direction to fire. After the doctor completes the surgical preparation, pressing the firing safety piece 82 can trigger the firing safety switch 81. At this time, pressing the handle body 41 again to trigger the first control switch 71, the actuator 3 can move in the distal direction to fire the stapler. By providing the firing safety switch 81, the safety and reliability of the electric stapler are further improved, and accidental firing when the doctor has not completed the surgical preparation is avoided.

[0057] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the handle 4 also includes a mating member 42. The mating member 42 is rotatably connected to the handle body 41. In this embodiment, the handle body 41 and the mating member 42 can be mounted to the stapler housing via a common rotational axis 43. The handle body 41 also includes a first linkage portion 413. The mating member 42 includes a second linkage portion 421. When the handle body 41 is driven to move in the first direction, the first linkage portion 413 acts on the second linkage portion 421 to drive the mating member 42 in the first direction. The mating member 42 also includes a first elastic member connected to provide an elastic force to the mating member 42 to cause it to move in the second direction. In this embodiment, the first elastic member is a return spring 52, whose ends are respectively connected to the spring fixing portion 422 of the mating member 42 and a spring fixing member 94. After the mating member 42 rotates in the first direction with the handle body 41, the doctor releases the handle body 41. Under the elastic force of the return spring 52, the mating member 42 and the handle body 41 return to their initial positions. A second elastic member is provided between the mating member 42 and the handle body 41. In this embodiment, the second elastic member is a torsion spring 51. The two legs of the torsion spring 51 respectively abut against the mating member 42 and the handle body 41, exerting an elastic force on the mating member 42 and the handle body 41 to maintain their initial mating state. The types and fixing structures of the first and second elastic members herein are merely examples and do not limit the scope of protection of this application.

[0058] like Figure 2 and Figure 6As shown, the trigger mechanism further includes a stopper 93 that blocks movement of the mating member 42 from the initial position in the second direction. The stopper 93 is, for example, a boss or a pin fixed to the housing or frame of the stapler. The mating member 42 is provided with an arcuate stop groove 423. The stopper 93 is at least partially embedded within the stop groove 423 and is movable along the extension direction of the stop groove 423. When the handle 4 is in the initial state, the mating member 42 is in the initial position, and the stopper 93 is at the top of the stop groove 423. At this time, if the doctor presses the handle body 41, the handle body 41 drives the mating member 42 to rotate in the first direction, and the stop groove 423 moves relative to the stopper 93. The cooperation between the stopper 93 and the stop groove 423 also provides guidance for the mating member 42 and does not block the movement of the mating member 42 in the first direction. When the handle 4 is in the initial state, the fitting 42 is in the initial position. If the doctor lifts the handle body 41 so that the handle body 41 moves in the second direction, under the stopping action of the limiter 93, the fitting 42 will not rotate with the handle body 41 and remain in the initial position. At this time, the torsion spring 51 will undergo elastic deformation. After the doctor releases the handle body 41, under the elastic force of the torsion spring 51, the handle body 41 will reset in the first direction relative to the fitting 42 and return to its initial position.

[0059] The following combination Figure 4 、 Figure 7 and Figure 8 This section describes how the firing assembly works.

[0060] like Figure 1 、 Figure 4 and Figure 7 As shown, when the handle 4 is in its initial state, the physician grasps and presses the handle body 41, rotating it in a first direction. The first drive unit 411 drives the first transmission member 61 in a second direction, triggering the first control switch 71. The first control switch 71 sends a first trigger signal to the controller. Upon receiving the first trigger signal, the controller sends a first start signal to the motor 1, causing the motor 1 to rotate forward and, via the gear train 2, drive the actuator 3 distally, closing the stapler assembly. After the stapler is closed, if the physician does not press the firing safety 82, the stapler is in the firing safety state. Even if the physician presses the handle body 41 again, the controller will not send the first start signal to the motor 1, preventing the stapler from firing. Pressing the firing safety 82 triggers the firing safety switch 81, which in turn sends a safety release signal to the controller. At this point, the physician presses the handle body 41 again, causing the controller to send the first start signal to the motor 1 again, driving the actuator 3 distally, firing the stapler.

[0061] like Figure 1 、 Figure 4 and Figure 8 As shown, after the stapler is fired, the handle 4 is reset to its initial state by the reset spring 52. The doctor lifts the handle body 41, causing the handle body 41 to rotate in the second direction. The second drive unit 412 drives the second transmission member 62 to rotate in the first direction. The second transmission member 62 triggers the second control switch 72, which sends a second trigger signal to the controller. After receiving the second trigger signal, the controller sends a second start signal to the motor 1, which starts to reverse and drives the actuator 3 to move in the proximal direction through the gear set 2, thereby executing the retraction action of the stapler and opening the jaws of the stapler assembly.

[0062] 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 electric stapler includes an actuator, the trigger mechanism includes a first control switch, a second control switch, a first transmission member, a second transmission member, and a handle, the second control switch and the first control switch are arranged along the axial direction of the stapler, and the handle includes a first driving portion and a second driving portion; When the first driving part is driven to move in the first direction, the first control switch is triggered by the first transmission member, so that the first control switch triggers the actuator to move in the distal direction; when the second driving part is driven to move in the second direction, the second control switch is triggered by the second transmission member, so that the second control switch triggers the actuator to move in the proximal direction.

2. The trigger mechanism according to claim 1, characterized in that: The first transmission member and the second transmission member are respectively rotatably mounted on the frame of the stapler.

3. The trigger mechanism according to claim 1, characterized in that: The first transmission member and the second transmission member are arranged along the axial direction.

4. The trigger mechanism according to claim 3, characterized in that: The second control switch is arranged on the proximal side of the first control switch, and the second transmission member is located on the proximal side of the first transmission member.

5. The trigger mechanism according to claim 3, characterized in that: The first driving portion is at least partially located between the first transmission member and the second transmission member, and the second driving portion is at least partially located between the first transmission member and the second transmission member.

6. The trigger mechanism according to claim 1, characterized in that: The handle includes a handle body, which is rotatably connected to the housing of the stapler. The first driving part and the second driving part are arranged on a side of the handle body facing the first transmission member and the second transmission member.

7. The trigger mechanism according to claim 6, characterized in that: The handle also includes a mating piece, which is rotatably connected to the handle body. When the handle body is driven to move along the first direction, the mating piece is driven to move along the first direction; the mating piece is connected to a first elastic piece and is configured to provide the mating piece with an elastic force to cause it to move along the second direction. A second elastic piece is provided between the mating piece and the handle body.

8. The trigger mechanism according to claim 7, characterized in that: The trigger mechanism further includes a limiting member, the matching member is provided with a stopping groove, the limiting member is at least partially embedded in the stopping groove, and the limiting member blocks the matching member from moving from an initial position along the second direction.

9. A firing assembly, characterized in that: The device comprises an actuating member, a motor and the trigger mechanism according to any one of claims 1 to 8, wherein the first control switch and the second control switch are used to control the driving process of the motor on the actuating member.

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.

Images