WO2024017107A1 - Firing switching mechanism and surgical stapler - Google Patents

Abstract

A firing switching mechanism and a surgical stapler. The firing switching mechanism comprises a first handle component (1) and a second handle component (2). The first handle component (1) is provided with a switching member (13) and a locking member (5), and the locking member (5) can be driven to switch between a first state and a second state; when the switching member (13) is in a first position area and the locking member (5) is in the first state, the locking member (5) prevents the switching member (13) from moving to a second position area; when the first handle component (1) rotates in a first direction (R1), the second handle component (2) is not linked to the first handle component (1), and thus the stapler cannot be fired; when being driven to enter the second state, the locking member (5) does not prevent the switching member (13) from moving to the second position area; and when the switching member (13) is driven to enter the second position area, and the first handle component (1) rotates in the first direction (R1), the first handle component (1) drives the second handle component (2) to rotate in the first direction (R1) by means of the switching member (13), such that the stapler can be normally fired. The firing switching mechanism implements switching control of the stapler between a fired state and a non-fired state.

Description

Firing switching mechanism and surgical stapler Technical field

This application relates to the technical field of medical devices, specifically to a firing switching mechanism and a surgical stapler.

Background technique

The surgical stapler includes a stapler body, a firing handle movably connected to the stapler body, and a nail head that cooperates with the stapler body. The nail head includes a nail cartridge assembly and a nail anvil arranged oppositely. During the operation, first hold the firing handle, and pull the closing pull tab to move toward the proximal side of the stapler through the closing driving mechanism, thereby closing the nail cartridge assembly and the nail anvil to achieve a firing state. In the firing state, hold the firing handle again, drive the actuating rod to move in the distal direction through the firing part of the firing handle, and then push the staples to move toward the tissue. Shape and fit the tissue, and at the same time, the cutter moves to the distal side to cut the tissue.

In existing surgical staplers, when the stapler is not ready for firing, in order to avoid misfiring of the stapler, a safety mechanism is added. When the safety mechanism is in the safety state, the firing handle cannot rotate and drive the actuating rod. Then, after adding the safety mechanism, if the operator holds the firing handle hard when the stapler is not ready for firing, although the stapler is prevented from being fired accidentally, the blocking force of the safety mechanism and the operator's holding force are at the same time. Acting on the firing handle may cause the shell of the firing handle to crack, giving the operator a bad experience.

Contents of the invention

In view of the problems in the prior art, the purpose of this application is to provide a firing switching mechanism and a surgical stapler, which realizes switching control between the firing state and the non-firing state of the stapler, and when the stapler cannot be fired, The first handle part can still be held without damaging the handle structure.

An embodiment of the present application provides a firing switching mechanism for a surgical stapler. The firing switching mechanism includes a handle assembly. The handle assembly includes a first handle part and a second handle part. The first end of the first handle part is provided with There is a switching member and a locking member, the switching member can be driven to move between the first position area and the second position area, the locking member is pivoted at the first end of the first handle component, and the The locking member can be driven to switch between the first state and the second state;

When the switching member is in the first position area and the locking member is in the first state, the lock The stopper blocks the switching member from moving to the second position area, and when the first handle member rotates in the first direction, the second handle member does not link with the first handle member;

When the locking member is driven into the second state, the locking member does not block the switching member from moving to the second position area, the switching member is driven into the second position area and the When the first handle component rotates along the first direction, the first handle component drives the second handle assembly to rotate along the first direction through the switching member.

In some embodiments, the locking member includes a locking portion, the second position area is located on the proximal side of the first position area, the switching member is in the first position area, and the locking part When the component is in the first state, the locking portion is at least partially located on the proximal end side of the switching component.

In some embodiments, a switch button is provided on the distal side of the locking member, the switch button is configured to move in the axial direction, and when the switch button is driven to move toward the proximal direction, the switch button is driven to move in the proximal direction. The locking member enters the second state from the first state.

In some embodiments, when the locking part is in the first state and the switching button moves toward the proximal direction, the switching button drives the locking part to rotate in the first direction, so that The locking member enters the second state.

In some embodiments, the proximal end of the switch button includes a first slope, the distal end of the locking member includes a second slope, and the first slope is opposite to the second slope.

In some embodiments, when the switching member is driven to move from the second position area to the first position area and the locking member is in the first state, the switching member drives the locking member. The part rotates along the first direction, so that the locking member enters the second state.

In some embodiments, a sliding member is further provided inside the first handle component, the switching member is fixed on one side of the sliding member, and the sliding member can move in the axial direction.

In some embodiments, the first handle component further includes a first biasing member configured to bias the sliding member in a proximal direction.

In some embodiments, a closed link assembly is further provided, the closed link assembly is provided with a fourth fitting portion, the closed link assembly includes a first equilibrium state and a second equilibrium state, and the closed link assembly is in When the first equilibrium state and the first handle component rotates in the first direction, the closing link assembly is driven to move at least partially in the proximal direction, and the closing link assembly enters the second equilibrium state. ; When the closing link assembly is in the first equilibrium state, the fourth fitting portion resists the proximal end of the sliding member.

In some embodiments, the closed link assembly moves from the first equilibrium state to the second equilibrium state. In the state, the fourth matching part is separated from the sliding member;

When the closing link assembly enters the first equilibrium state from the second equilibrium state, the closing link assembly drives the fourth fitting portion to move in the distal direction, so that the switching member moves from the second equilibrium state to the first equilibrium state. The second location area enters the first location area.

In some embodiments, a second biasing member is further included, configured to apply a biasing force to the locking member to rotate in the second direction.

In some embodiments, the locking member is rotatably connected to the first end of the first handle component through a rotary connection, the second biasing member is a tension spring, and the tension spring is connected to the third between the first spring fixing part of a handle component and the second spring fixing part of the locking member, and the tension spring and the locking part are both located on the proximal end side of the rotary connection part.

In some embodiments, the second handle component includes a second handle groove, the second handle groove includes the first position area and the second position area, and the switch at least partially enters the second position area. In the handle slot.

In some embodiments, the second handle groove includes a switching groove and a relief groove, the relief groove is connected to the distal end of the switching groove, and the first position area and the second position area are respectively located at The distal end and the proximal end of the switching slot, when the switching piece is in the first position area and the first handle component rotates in the first direction, the switching piece enters the relief slot.

In some embodiments, the second handle component includes a support part, the second handle groove is provided in the support part, and the relief groove is an arc-shaped groove connected with the distal end of the switching groove, When the support part is in the second initial position, the switching groove extends in the axial direction.

In some embodiments, the first handle component includes a handle body, the handle body is provided with a first handle slot, the switch at least partially enters the first handle slot, and when the handle body is in the first initial position, The first handle groove extends in the axial direction, and the first handle groove and the switching groove at least partially overlap.

In some embodiments, the second handle component includes a firing member and a support portion, the first end of the first handle component at least partially enters the interior of the support portion, and the firing member is rotatably connected to the firing member. component, and the support part is provided with the second handle groove.

In some embodiments, the locking member is located between the first handle component and the support.

In some embodiments, the handle assembly includes a first resisting part, and the housing of the stapler is provided with a first limiting part. In an initial state, the first limiting part resists the first The resisting portion is used to limit the movement of the handle assembly in a second direction, and the second direction is opposite to the first direction.

In some embodiments, the first resisting portion is provided on the first handle part and the second handle part; Or, the first resisting portion is provided on the first handle component, and the second handle component at least partially resists the first resisting portion; or, the first resisting portion is provided on the first resisting portion. Second handle parts.

In some embodiments, the support portion is rotatably connected to the first handle component through a handle pin, and a third biasing member is provided at the handle pin, configured to bias the support portion relative to A biasing force for rotation of the first handle member in the second direction.

In some embodiments, an actuating rod is further included, the firing member includes a third state away from the actuating rod and a fourth state close to the actuating rod, the firing member includes a second resisting portion, The housing of the stapler is provided with a second limiting portion. In the initial state, the second limiting portion resists the second resisting portion to maintain the firing member in the third state. .

In some embodiments, a fourth biasing member configured to apply a biasing force to the firing member to rotate in the second direction is further included.

In some embodiments, the first handle component is rotatably connected to the housing of the stapler, and the firing switching mechanism further includes a fifth biasing member configured to bias the first handle component along a first Bias force for rotation in two directions.

An embodiment of the present application also provides a surgical stapler, including the above-mentioned firing switching mechanism.

The firing switching mechanism and surgical stapler provided by this application have the following advantages:

This application realizes switching control between the firing state and the non-firing state of the stapler by adjusting the position of the switching member. When the switching member is locked in the first position area by the locking member, the second handle member cannot be driven even if the first handle member is held. When the second handle part rotates, the stapler cannot be fired, and the first handle part can still be held in this state without damaging the handle structure. After the locking part releases the switching part, the switching part can be driven to move to the second position area. This Holding the first handle part can drive the second handle part to rotate, thereby firing the stapler.

Description of drawings

Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of the non-limiting embodiments with reference to the following drawings.

Figure 1 is a schematic structural diagram of a medical stapler according to an embodiment of the present application;

Figure 2 is a partial structural schematic diagram of the stapler after removing one side of the housing according to an embodiment of the present application;

Figure 3 is a partial structural schematic diagram of the stapler after removing one side of the housing according to an embodiment of the present application;

Figure 4 is a schematic structural diagram of the cooperation between the housing and the handle assembly according to an embodiment of the present application;

Figure 5 is a schematic structural diagram of the firing switching mechanism in the initial state according to an embodiment of the present application;

Figure 6 is a schematic structural diagram of a support part according to an embodiment of the present application;

Figure 7 is a schematic structural diagram of the first handle component according to an embodiment of the present application;

Figure 8 is a schematic diagram of the cooperation between the first handle component and the locking component according to an embodiment of the present application;

Figure 9 is a schematic structural diagram of the cooperation between the sliding member and the switching member according to an embodiment of the present application;

Figure 10 is a schematic diagram of the cooperation between the first handle component and the locking component in the initial state according to an embodiment of the present application;

Figure 11 is a schematic structural diagram of an embodiment of the present application when holding the first handle component in an initial state;

Figure 12 is a schematic structural diagram of the firing switching mechanism after the nail head is closed according to an embodiment of the present application;

Figure 13 is a schematic diagram of the matching structure of the first handle component and the locking component when the switching button is pressed according to an embodiment of the present application;

Figure 14 is a schematic diagram of the matching structure of the first handle part and the locking part after the switching button is released according to an embodiment of the present application;

Figure 15 is a structural schematic diagram of holding the first handle component when the switching member is in the second position area according to an embodiment of the present application;

Figure 16 is a schematic diagram of the matching structure of the closed link assembly and the first handle component when resetting according to an embodiment of the present application;

Figure 17 is a schematic structural diagram of the closing link assembly and the first handle component after reset according to an embodiment of the present application.

Reference signs:
1 First handle part 5 Locking part
11 Handle body 51 Rotary connection part
111 First end 52 Second spring fixing part
112 Second end 53 Locking part
113 First handle groove 54 Second fitting part
114 Closing drive 6 rack
115 First spring fixing part 61 Driving tooth
116 First mounting slot 7 closed link assembly
117 Torsion spring installation slot 71 First rod
12 Slider 714 Fourth fitting part
121 The third matching part 72 The second rod
13 Switching piece 731 first pin
14 Slider compression spring 732 second pin
2 Second handle part 733 Third pin
21 Support part 74 Closing lever
211 Second handle slot 75 Closure tab
2111 Switching slot 8 stapler body
2112 relief slot 81 shell
212 The first resisting part 811 The first limiting part
213 giving way 812 second limiting part
22 firing piece 813 second mounting slot
221 Second resisting part 814 Connecting rod fixing part
222 Rack drive part 82 Fixed handle
261 Firing member pin 83 Connecting rod
262 firing member torsion spring 84 handle return spring
31 handle pin 9 nail head
32 Bracket torsion spring 91 Nail anvil
33 Locking element spring 911 first fitting groove
41 Switch button 92 Nail cartridge assembly
411 Operating part 921 Second fitting groove
412 First fitting part 93 Closing pin
42 switch button pressure spring

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments. To those skilled in the art. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated description will be omitted. The words “or” and “or” in the description may mean “and” or “or”. Although the terms "upper," "lower," "between," etc. may be used in this specification to describe various illustrative features and elements of the present application, these terms are used herein for convenience only, such as in the drawings. direction of the example described. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of a structure to fall within the scope of this application. Although “first”, “second”, “third” or “fourth” are used in this specification to refer to certain features, they are only for expressive purposes and serve as limitations on the number and importance of specific features.

The present application provides a firing switching mechanism and a surgical stapler including the same. The firing switching mechanism can Switch the surgical stapler between the firing state and the non-firing state. The firing switching mechanism includes a handle assembly including a first handle component and a second handle component. The first end of the first handle component is provided with a switching member and a locking member, and the switching member can be driven to move between a first position area and a second position area. When the switching member is in the first position area, the first handle part and the second handle part are not linked, the first handle part cannot drive the second handle part to rotate in the first direction, and the switching part is in In the second position region, the first handle part and the second handle part are linked, and when the first handle part rotates in the first direction, the switching member can drive the second handle part to rotate.

The locking member is pivoted on the first end of the first handle component. The locking member can be driven to switch between a first state and a second state. When the switching member is in the first position area and the locking member is in the first state, the switching member is locked in the first position area by the locking member and cannot move to the second position area. At this time Even if the first handle part is held, the second handle part cannot be driven to rotate, the stapler cannot be fired, and the first handle part can still be held in this state without damaging the handle structure. After the locking member enters the second state, the switching member is released, that is, it no longer blocks the movement of the switching member to the second position area, and the switching member can be driven to move to the second position area. At this time Holding the first handle part can drive the second handle part to rotate in the first direction through the switching member, thereby firing the stapler. Therefore, this application can realize switching between the firing state and the non-firing state of the stapler by adjusting the position of the switching member. Specifically, when the switching member is in the first position area, the stapler is in the non-firing state, and the switching member is in the non-firing state. In the second position area, the stapler is in a firing state.

The structure of the firing switching mechanism of each specific embodiment of the present application will be described in detail below with reference to the accompanying drawings. It can be understood that each specific embodiment does not limit the protection scope of the present application.

As shown in FIGS. 1 to 3 , the surgical stapler includes a stapler body 8 , a handle assembly rotatably connected to the stapler body 8 , and a nail head 9 located at the distal end of the stapler body 8 . The stapler body 8 includes a housing 81, a fixed handle 82 and a hollow connecting rod 83. The connecting rod 83 extends along the axial direction of the stapler. The nail head 9 is provided at the distal end of the connecting rod 83 . The stapler includes a non-firing state when not ready for firing and a firing state after being ready for firing. After the stapler enters the firing state, by holding the handle assembly, the handle is The entire assembly is rotated toward the fixed handle 82 in the first direction to fire the stapler.

In this application, the distal side and the proximal side are relative to the operator. The end closer to the operator is the proximal side, and the end farther from the operator, that is, the end closer to the surgical site is the distal side. The end side refers to the direction along the axis of the stapler as the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in the perspective of Figure 1, the distal side of the stapler is the right side, and the proximal side is the right side. The end side is the left side. The S1 direction in Figure 1 is the direction from the distal side to the proximal side of the stapler. Define the S1 direction or the direction opposite to the S1 direction as the axial direction of the stapler. Define the S2 direction in Figure 1 as the longitudinal direction, that is, the height direction. Define the R1 direction shown in Figure 11 as the first direction. In the perspective of Figure 11, the first direction is the clockwise direction. Define the direction opposite to the R1 direction as the second direction, that is, as shown in Figure 15, the R2 direction. is the second direction. In the perspective of FIG. 15 , the second direction is the counterclockwise direction.

As shown in FIGS. 2 to 8 , the firing switching mechanism includes the handle assembly, which includes a first handle component 1 and a second handle component 2 . The first handle part 1 includes a handle body 11 , and a first end 111 of the handle body 11 cooperates with the second handle part 2 . The second end 112 of the handle body 11 is a holding end for the operator to hold. A fifth biasing member is provided between the handle body 11 and the housing 81 of the stapler to provide the handle with The body 11 exerts a biasing force causing it to rotate in the second direction. When the handle body 11 of the first handle component 1 is not held, the handle body 11 is in a first initial position. When the operator holds the handle body 11 of the first handle component 1, the handle body 11 starts to rotate in the first direction from the first initial position to drive the handle return spring 84 to deform. After releasing the handle body 11, Under the deformation restoring force of the handle return spring 84, the handle body 11 rotates in the second direction and returns to the first initial position. In this embodiment, the fifth biasing member is a handle return spring 84, and may be a tension spring. In other embodiments, the fifth biasing member may also be a compression spring, a torsion spring, etc.

The stapler can be fired when the second handle component 2 is rotated in the first direction. The second handle part 2 includes a firing part 22 and a supporting part 21. The firing part 22 is rotatably fixed to the supporting part 21. In this embodiment, the firing member 22 is a firing pawl. The first end 111 of the handle body 11 at least partially enters the support portion 21 . The support part 21 is rotatably connected to the handle body 11 of the first handle component 1 through a handle pin 31. A third biasing member is also provided at the handle pin 31 to exert force on the support part 21. The bias force for its rotation in the second direction. In this embodiment, the third biasing member is a bracket torsion spring 32, one end of which is against the handle body 11 of the first handle component 1, and the other end of which is fixed on the support part 21, so The handle body 11 is provided with a torsion spring mounting groove 117 for accommodating the bracket torsion spring 32 . The housing 81 of the stapler is provided with a first limiting portion 811 , and the proximal end side of the support portion 21 is provided with a first resisting portion 212 . In the initial state, the support part 21 is in the second initial position, and the first limiting part 811 resists the first resisting part 212 to block the rotation of the support part 21 in the second direction to achieve alignment. The second initial position of the support portion 21 is limited. In another embodiment, a first resisting part may also be provided on the first handle part 1, and in the initial state, the second handle part 2 resists the first resisting part, and the first resisting part resists The first limiting portion 811 of the housing 81 blocks the first handle part 1 and the second handle part 2 from moving along the second direction of movement. In yet another embodiment, first resisting portions may be respectively provided on the first handle member 1 and the second handle member 2 to block the first handle member 1 and the second handle member 2 from moving along the second handle member in the initial state. direction of movement.

As shown in Figures 3 to 10, the first handle component 1 also includes a switching member 13. In this embodiment, the switching member 13 is a switching shaft, but the application is not limited thereto. In other embodiments, the switching member 13 is a switching shaft. The switching member 13 may be, for example, a bump, a pin or other structures. The handle body 11 includes a first handle groove 113 , the support portion 21 includes a second handle groove 211 , and the second handle groove 211 includes a switching groove 2111 and a relief groove 2112 that are connected. The switching member 13 at least partially enters the first handle groove 113 and the second handle groove 211 . In the initial state, the switching groove 2111 extends along the axial direction and includes a first position area and a second position area. The first position area is located at the far end side of the second position area. From the perspective of FIG. 6 , the first position area is the right end area of the switching slot 2111, and the second position area is the left end area of the switching slot 2111. The relief groove 2112 is an arc-shaped groove and is connected with the first position area. When the handle body 11 is in the first initial position, the first handle groove 113 at least partially overlaps the switching groove 2111 .

The switching member 13 can be driven to move between a first position area and a second position area. When the switching member 13 is in the first position area, the first handle part 1 and the second handle part 2 are not linked, and the first handle part 1 cannot drive the second handle part 2 to rotate, so it cannot fire. The stapler, that is, the stapler is in a non-firing state at this time. When the switching member 13 is in the second position area, the first handle part 1 and the second handle part 2 are linked through the switching part 13. When the first handle part 1 rotates in the first direction, the first handle part 1 and the second handle part 2 can be linked by the switching part. 13. Drive the second handle part 2 to rotate in the first direction, and then fire the stapler.

As shown in Figures 3 to 5, the firing switching mechanism also includes an actuating rod. In this embodiment, the actuating rod is a rack 6 , which includes a plurality of drive teeth 61 . The firing member 22 includes a second resisting portion 221 and a rack driving portion 222 . The firing member 22 is rotatably connected to the support portion 21 through a firing member pin 261. A fourth biasing member is provided at the firing member pin 261 to exert force on the firing member 22 to move it along the second biasing member. Bias force for directional rotation. In this embodiment, the fourth biasing member is a firing member torsion spring 262 that is sleeved on the firing member pin 261 , and the feet at both ends respectively resist the firing member 22 and the support portion 21 . In other embodiments, the fourth biasing member may also be a tension spring, a compression spring, an elastic piece, or other elastic members. The firing member 22 includes a third state away from the rack 6 and a fourth state close to the rack 6 . FIG. 5 shows a third state of the firing member 22 , in which the rack driving part 222 is relatively far away from the rack 6 and does not cooperate with the driving teeth 61 . FIG. 15 shows the fourth state of the firing member 22 , in which the rack driving part 222 is relatively close to the rack 6 and meshes with the driving teeth 61 . The housing 81 of the stapler also includes a second limiting part 812. In the initial state, the second limiting part 812 resists the The second resisting portion 221 blocks the firing member 22 from moving toward the rack 6 and keeps the firing member 22 in the third state. If the support part 21 drives the firing part 22 to move in the first direction, so that the second resisting part 221 of the firing part 22 is separated from the second limiting part 812, then the firing part 22 will The torsion spring 262 rotates in the second direction under the biasing force of the torsion spring 262 to enter the fourth state.

As shown in FIGS. 8 and 10 , the first handle part 1 further includes a locking member 5 that can be driven to switch between the first state and the second state. The locking part 5 includes a rotary connection part 51 and a locking part 53. The locking part 5 is rotatably connected to the third part of the handle body 11 through a pin or boss provided on the rotary connection part 51. 111 on one end. As shown in FIG. 6 , the support part 21 also includes a relief part 213 that gives way to the pin or boss at the rotary connection part 51 . When the first handle part 1 rotates in the second direction and the support part 21 of the second handle part 2 remains in the second initial position, the pin or boss at the rotary connection part 51 at least partially enters the let-down position. position 213 to avoid interference. FIG. 10 shows the first state of the locking member 5 , and FIG. 13 shows the second state of the locking member 5 . As shown in FIG. 10 , when the switching member 13 is in the first position area and the locking member 5 is in the first state, the locking portion 53 is at least partially located at the proximal end of the switching member 13 side to block the movement of the switching member 13 in the proximal direction, so the switching member 13 is locked in the first position area by the locking member 5 and cannot move to the second position area. At this time, the first handle part 1 and The second handle part 2 is not linked. Even if the first handle part 1 is held, the second handle part 2 cannot be driven to rotate. The stapler cannot be fired. In this state, the first handle part 1 can still be held without damaging the handle structure. During this process, the switching member 13 can enter the relief groove 2112 from the first position area without interfering with the second handle component 2 . As shown in FIG. 13 , after the locking member 5 is driven into the second state, the locking part 53 moves in a direction away from the switching member 13 and no longer blocks the switching member 13 from moving toward the proximal side. direction movement, that is, the locking member 5 releases the switching member 13, and the switching member 13 can be driven to move to the second position area, at which time the first handle part 1 and the second handle part 2 Through the linkage of the switch 13, holding the first handle part 1 can drive the second handle part 2 to rotate in the first direction through the switch 13, driving the rack 6 to move in the distal direction, thereby firing the stapler.

As shown in FIGS. 3 and 10 , a switch button 41 is provided on the distal side of the locking member 5 , and the switch button 41 is configured to be movable in the axial direction. The housing 81 is provided with a second installation groove 813 , and the switching button 41 at least partially enters the second installation groove 813 . The switching button 41 includes an operating portion 411 exposed outside the housing 81 and a first fitting portion 412 opposite to the locking member 5 . The distal end of the locking member 5 includes a second fitting portion 54 , the proximal end surface of the first fitting part 412 and the distal end surface of the second fitting part 54 are respectively a first inclined surface and a second inclined surface with the same inclination direction. The switch button 41 is driven toward the proximal side. When moving forward, the first fitting part 412 drives the second fitting part 54, and the axial movement of the switching button 41 is converted into the locking function through the cooperation of the first inclined surface and the second inclined surface. The rotational movement of the member 5 causes the locking member 5 to rotate in the first direction, the locking portion 53 moves upward, and the locking member 5 enters the second state from the first state to release the Switch 13. The proximal end of the locking member 5 is also provided with a second biasing member, which applies a biasing force to the locking portion 53 to rotate in the second direction. In this embodiment, the second biasing member is a locking member spring 33, such as a tension spring. The proximal end of the locking member 5 is provided with a second spring fixing portion 52. A side of the handle body 11 A first spring fixing part 115 is provided on the side, and both ends of the tension spring are fixed to the first spring fixing part 115 and the second spring fixing part 52 respectively. In another embodiment, the second biasing member may also be a torsion spring set at the rotary connection part 51 , or a compression spring provided at the distal end/proximal end of the locking member 5 /Tension spring/Shrapnel, etc. A switching button compression spring 42 is also provided at the proximal end of the switching button 41 to exert a biasing force toward the distal side of the switching button 41 . In the state of FIG. 10 , when the switching button 41 is driven to move toward the proximal direction, the switching button compression spring 42 is compressed and deformed, and the locking member 5 is driven to rotate into the second state and drives the locking member spring. 33 undergoes elastic deformation and reaches the state in Figure 13. In the state of Figure 13, when the switching button 41 is released, the switching button 41 moves in the distal direction under the action of the switching button compression spring 42 and returns to the position when it is not pressed by an external force. The locking member 5 is in the lock state. The stopper spring 33 rotates in the second direction and returns to the first state.

As shown in FIGS. 8 to 10 , in this embodiment, the handle body 11 of the first handle component 1 is provided with a first mounting groove 116 , and the first mounting groove 116 is connected to the proximal end side of the handle body 11 Wall, a sliding member 12 is also provided inside the first mounting groove 16, the switching member 13 is fixed on one side of the sliding member 12, and the sliding member 12 can move in the axial direction. The first handle component 1 further includes a first biasing member configured to apply a biasing force toward the proximal direction to the sliding member 12 . In this embodiment, the first biasing member is a sliding member compression spring 14 (shown in FIG. 13 ) disposed between the distal side wall of the first mounting groove 116 and the sliding member 12 . However, the present application is not limited thereto. In other embodiments, the first biasing member may also be other types of elastic members, such as elastic pieces, tension springs, etc. In the initial state, the switching member 13 is held in the first position area by the locking member 5, the sliding member compression spring 14 undergoes elastic deformation, and the locking member 5 enters the second state to release the After switching the member 13, under the action of the elastic deformation restoring force of the sliding member compression spring 14, the sliding member 12 drives the switching member 13 to move in the proximal direction and drives the switching member 13 to move to the second position area.

As shown in FIGS. 1 to 5 , the stapler is also provided with a closing link assembly 7 , which includes a first rod 71 , a second rod 72 , a closing pull rod 74 and a closing pull tab 75 . The first rod 71 and the second rod 72 form a connecting rod structure. The first end of the first rod 71 is rotatably connected to the housing through a first pin 731 The connecting rod fixing portion 814 of 81 allows the first rod 71 to only have rotational movement but no axial movement relative to the housing 81 . The second end of the first rod 71 and the first end of the second rod 72 are rotatably connected through a second pin 732 , and the second end of the second rod 72 is connected to the first end through a third pin 733 . The closing pull rod 74 is rotatably connected, and the closing pull rod 74 is fixedly connected to the proximal end of the closing pull tab 75 . The closing pull tab 75 is penetrated in the connecting rod 83 , and the closing pull tab 75 The distal end extends axially to the nail head. The handle body 11 of the first handle part 1 further includes a closing driver 114 . The closed link assembly 7 includes a first equilibrium state as shown in Figure 2 and a second equilibrium state as shown in Figure 12. When the closed link assembly 7 is in the first equilibrium state, the second pin The shaft 732 is located at a position away from the rack 6, and the closed link assembly 7 is in a relatively compact state in the axial direction. When the closed link assembly 7 enters the second equilibrium state, the second pin 732 In a position close to the rack 6, the closed link assembly 7 is in a relatively extended state in the axial direction. The first equilibrium state and the second equilibrium state are both self-balancing states of the closed link assembly 7 . Switching between the two equilibrium states can be driven by the closing driver 114 of the first handle part 1 . When the closing link assembly 7 enters the second equilibrium state from the first equilibrium state, the second end of the second rod 72 moves in the proximal direction, and the closing pull rod 74 drives the closing pull tab 75 in the proximal direction. sports.

The closing process of the nail head 9 will be introduced below with reference to Figures 1, 2 and 12. The nail head 9 includes a nail anvil 91 and a nail cartridge assembly 92 arranged oppositely. The nail anvil 91 has an open state relative to the nail cartridge assembly 92 and a closed state relative to the nail cartridge assembly 92 . . The proximal side of the nail anvil 91 is provided with an inclined first fitting groove 911, the proximal side of the nail cartridge assembly 92 is provided with an axially extending second fitting groove 921, and a closing pin 93 is simultaneously provided in all the fitting grooves 911. in the first fitting groove 911 and the second fitting groove 921 . The distal end of the closing pull tab 75 is connected to the closing pin 93 . In the initial state, the closing link assembly 7 is in the first equilibrium state, the closing pin 93 is located at the distal side of the second fitting groove 921, the nail anvil 91 is in the open state, and the The stapler is not ready to fire. Holding the first handle part 1, the closing driving member 114 drives the first rod 71 to rotate in the first direction, the second rod 72 drives the closing pulling rod 74 to move in the proximal direction, and the closing pulling rod 74 drives the closing pulling rod 74 to move in the proximal direction. The closing pull tab 75 moves toward the proximal direction, and the closing link assembly 7 enters the second equilibrium state. During this process, the closing pull tab 75 pulls the closing pin 93 to move from the distal side to the proximal side of the second fitting groove 921, and the nail anvil 91 enters the closed state. At this time, The nail anvil 91 and the nail cartridge assembly 92 clamp the tissue. The process of the nail anvil 91 entering the closed state from the open state is called the closing process of the nail head 9, that is, the closing process of the stapler, thereby completing the firing preparation of the stapler. During the firing process of the stapler, it is necessary to keep the nail head 9 closed. After the stapler is fired, when the closing pin 93 and the closing pull tab 75 are driven to move in the distal direction, The nail head 9 is opened via the closing pin 93 . In this embodiment, when the nail head 9 is in an open state, the stapler is not ready for firing; after the nail head 9 is driven to close by the closing link assembly 7, the stapler is completed. Ready to fire.

The working process of the stapler in this embodiment will be introduced in detail below with reference to Figures 2 to 17.

As shown in Figures 2 to 10, in the initial state, the closed link assembly 7 is in the first equilibrium state, the second pin 732 is located at a position away from the rack 6, and the nail head The stapler is in an open state, and the stapler is not ready to fire. The handle body 11 of the first handle component 1 is in a first initial position away from the fixed handle 82 . The locking part 5 is in the first state, and the locking part 53 locks the switching part 13 in the first position area of the switching groove 2111, so the stapler is in a non-firing state, And under the blocking effect of the locking part 53. The sliding member compression spring 14 is compressed by the sliding member 12 and undergoes elastic deformation. The first resisting portion 212 of the supporting portion 21 resists the first limiting portion 811 of the housing 81 so that the supporting portion 21 is in the second initial position shown in FIG. 2 . The second resisting portion 221 of the firing member 22 resists the second limiting portion 812 of the housing 81 , so that the firing member 22 is maintained in a third state away from the rack 6 . The rack driving part 222 of the component 22 does not cooperate with the driving teeth 61 of the rack 6 . The firing member torsion spring 262 undergoes torsional elastic deformation.

As shown in FIG. 5 , a fourth fitting portion 714 is provided on the side of the first rod 71 facing the handle body 11 , and a third fitting portion 121 is provided on the proximal end of the sliding member 12 . In the initial state, the fourth fitting part 714 resists the third fitting part 121 so that the slider 12 cannot move in the proximal direction. At this time, even if the switch button 41 is pressed, the lock The stopper 5 rotates to the second state to release the switching member 13. Under the action of the fourth matching part 714, the switching member 13 cannot enter the second position area, and the stapler cannot be driven to enter. to a firing state. Therefore, under the dual action of the locking part 5 and the fourth matching part 714, the switching part 13 can be stably maintained in the first position area, thereby further ensuring that the nail head cannot be fired when the nail head is not closed. stapler.

As shown in FIG. 11 , when the switching member 13 is in the first position area and the handle body 11 of the first handle component 1 is held and rotated in the first direction, the drive handle return spring 84 is elastically deformed, so The switching member 13 enters the relief groove 2112 connected with the switching groove 2111 and moves along the arc-shaped relief groove 2112 to prevent the support part 21 from rotating and interfering with the first handle component 1 . The second handle part 2 is not linked with the first handle part 1 . Therefore, the support part 21 still remains in the first initial position without rotating, the firing part 22 also maintains the position in the initial state, and the state of the firing part 22 will not change and remains in the initial position. Under the action of the second limiting part 812, it is maintained in the third state away from the rack 6. Will contact with the driving teeth 61 of the rack 6, and the stapler will not be fired. At the same time, when the first handle part 1 rotates in the first direction, the closing driving member 114 of the first handle part 1 drives the first rod 71 to rotate in the first direction, and the second pin 732 moves closer to the The directional movement of the rack 6 drives the closing pull rod 74 and the closing pull tab 75 to move in the proximal direction through the second rod 72, gradually closing the nail head until the stapler enters the Figure 12 shows the state. In the state shown in Figure 12, the closing link assembly 7 enters the second equilibrium state, the nail head is closed, and the stapler is ready for firing. At this time, when the first handle part 1 is released, the handle body 11 of the first handle part 1 will return to its first initial position under the action of the handle return spring 84. Since the closing link assembly 7 is in A self-balancing second equilibrium state will not return to the first equilibrium state even if the driving effect of the first handle component 1 is lost, and can maintain the stability of the nail head closure.

As shown in FIG. 12 , after the nail head is closed, the fourth fitting portion 714 of the first rod 71 no longer resists the third fitting portion 121 of the sliding member 12 . As shown in FIG. 13 , at this time, pressing the switch button 41 causes the switch button 41 to move toward the proximal direction, and the first fitting part 412 drives the second fitting part 54 so that the locking The member 5 rotates in the first direction and enters the second state, driving the locking member spring 33 to elastically deform, and releasing the switching member 13 . After the switching member 13 loses the blocking effect of the locking portion 53, it will move toward the proximal direction under the elastic deformation restoring force of the sliding member compression spring 14 and enter the third part of the switching groove 2111. Two location areas. Release the switch button 41, and the switch button 41 moves to the distal side under the action of the switch button compression spring 42 and no longer presses the locking member 5. Under the action of the stopper spring 33, it rotates in the second direction and returns to the first state. At this time, the switching member 13 moves to the proximal end side of the locking portion 53 and stays in the second position area. The stapler enters the firing state.

As shown in Figure 15, when the stapler is in a firing state, that is, when the switching member 13 enters the second position area of the switching groove 2111, the first handle part 1 and the second handle part 2 Linked by the switch 13. When the first handle part 1 is held again so that the handle body 11 of the first handle part 1 rotates in the first direction, the first handle part 1 drives the support part 21 in the first direction through the switching member 13 Rotate, the first resisting portion 212 of the supporting portion 21 is separated from the first limiting portion 811 . The support part 21 drives the firing part 22 to rotate in the first direction. The second resisting part 221 of the firing part 22 no longer resists the second limiting part 812. When the firing part torsion spring 262, the firing part 22 rotates in the second direction relative to the support part 21 and enters the fourth state. The rack driving part 222 of the firing part 22 and the drive of the rack 6 Teeth 61 mesh. Continue to hold the first handle part 1, the first handle part 1 continues to drive the second handle part 2 to rotate in the first direction, and the firing member 22 drives The rack 6 moves toward the distal side to fire the stapler. After the stapler is fired, the first handle part 1 is released, the handle body 11 of the first handle part 1 rotates in the second direction and returns to its first initial position under the action of the handle return spring 84, and the second handle The component 2 rotates in the second direction under the action of the bracket torsion spring 32 and returns to the first resisting portion 212 to resist the first limiting portion 811 of the housing 81 again, and the firing member 22 The second resisting portion 221 resists the second limiting portion 812 of the housing 81 again. Therefore, the first resisting portion 212 defines the second initial position of the supporting portion 21 , and the second resisting portion 221 defines the initial state of the firing member 22 .

As shown in Figure 16, after the stapler is fired, the nail head needs to be opened again. At this time, the closed link assembly 7 is driven to return from the second equilibrium state to the first equilibrium state. During this process, the first rod 71 rotates in the second direction, and the fourth part of the first rod 71 rotates in the second direction. The fitting part 714 drives the third fitting part 121 of the sliding part 12 so that the sliding part 12 drives the switching part 13 to move in the distal direction. The switching part 13 and the proximal end of the locking part 53 The locking part 53 is lifted upward by matching the surface, and the locking member 5 rotates in the first direction to enter the second state without blocking the movement of the switching member 13 to the distal direction. After the member 13 moves to the first position area on the distal side of the locking part 53, the locking member 5 loses the function of the switching member 13 and returns to the first position under the action of the firing member torsion spring 262. In this state, the locking part 53 is located on the proximal side of the switching member 13, the locking member 5 locks the switching member 13 in the first position area again, and the stapler is in another state. It enters the non-firing state shown in Figure 17, that is, the first handle part 1 and the second handle part 2 enter the non-linked state again, and the first handle part 1 cannot be fired by the second handle part 2 even if it is rotated again. stapler. As shown in FIG. 17 , in this embodiment, the proximal end surface of the locking part 53 is a guide surface, so that the switching member 13 moves distally to push up the locking part 53 more smoothly. The distal surface of the locking part 53 is a vertical surface, so that when the locking part 53 locks the switching member 13 in the first position area, the distance between the switching member 13 and the locking part 53 The fit is more stable. In the state of Figure 17, even if the operator accidentally holds the first handle part 1 again, the stapler cannot be fired, thereby effectively preventing accidental secondary firing of the stapler, and the first handle part 1 can be driven to rotate, avoiding Because the increased safety creates resistance to the operator, the shell or other structures of the first handle part 1 may be damaged.

To sum up, this application realizes switching between the non-firing state and the firing state of the stapler by adjusting the position of the switching member 13 so that it moves between the first position area and the second position area. When the switching part 13 is in the first position area, it is locked by the locking part 5, which improves the stability of the stapler when it is in a non-firing state and effectively prevents the stapler from being fired accidentally. And after the stapler enters the firing state, by holding the first handle part 1, the second handle part 2 can be driven to move in the first direction through the switching member 13, so that the stapler can be fired normally.

The above content is a further detailed description of the present application in combination with specific preferred embodiments, and it cannot be concluded that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, several simple deductions or substitutions can be made without departing from the concept of this application, which should be regarded as falling within the protection scope of this application.

Claims (25)

1. A firing switching mechanism, characterized in that it is used for surgical staplers, the firing switching mechanism includes a handle assembly, the handle assembly includes a first handle part and a second handle part, the first end of the first handle part is provided with A switching member and a locking member, the switching member can be driven to move between a first position area and a second position area, the locking member is pivoted at the first end of the first handle component, and the locking member The stopper can be driven to switch between the first state and the second state;

   When the switching member is in the first position area and the locking member is in the first state, the locking member blocks the switching member from moving to the second position area, and the first handle component moves along the When rotating in the first direction, the second handle component is not linked with the first handle component;

   When the locking member is driven into the second state, the locking member does not block the switching member from moving to the second position area, the switching member is driven into the second position area and the When the first handle component rotates along the first direction, the first handle component drives the second handle assembly to rotate along the first direction through the switching member.
2. The firing switching mechanism according to claim 1, wherein the locking member includes a locking portion, the second position area is located at the proximal side of the first position area, and the switching member is located at the proximal end of the first position area. In the first position region and when the locking part is in the first state, the locking part is at least partially located on the proximal end side of the switching part.
3. The firing switching mechanism according to claim 2, wherein a switching button is provided on the distal side of the locking member, the switching button is configured to be movable in the axial direction, and the switching button is driven toward When moving in the proximal direction, the locking member is driven from the first state to the second state.
4. The firing switching mechanism according to claim 3, wherein when the locking member is in the first state and the switching button moves toward the proximal direction, the switching button drives the locking portion along the The first direction rotation causes the locking member to enter the second state.
5. The firing switching mechanism according to claim 4, wherein the proximal end of the switch button includes a first slope, the distal end of the locking member includes a second slope, and the first slope is in contact with the second slope. The bevels are set relative to each other.
6. The firing switching mechanism according to claim 4, characterized in that when the switching member is driven to move from the second position area to the first position area and the locking member is in the first state, The switching member drives the locking part to rotate in the first direction, so that the locking part enters the second state.
7. The firing switching mechanism according to claim 6, characterized in that a sliding member is further provided inside the first handle part, and the switching member is fixed on one side of the sliding member, and the sliding member can move along the axial direction. sports.
8. The firing switching mechanism according to claim 7, wherein the first handle component further includes a first biasing member configured to apply a biasing force toward the proximal direction to the sliding member.
9. The firing switching mechanism according to claim 7, further comprising a closing link assembly, the closing link assembly is provided with a fourth matching part, the closing link assembly includes a first balance state and a second balance state. state, when the closing link assembly is in the first equilibrium state and the first handle component rotates in the first direction, the closing link assembly is driven to move at least partially in the proximal direction, and the closing link assembly The rod assembly enters the second equilibrium state; when the closed link assembly is in the first equilibrium state, the fourth fitting portion resists the proximal end of the slider.
10. The firing switching mechanism according to claim 9, characterized in that when the closing link assembly enters the second equilibrium state from the first equilibrium state, the fourth matching part is separated from the sliding member;

    When the closing link assembly enters the first equilibrium state from the second equilibrium state, the closing link assembly drives the fourth fitting portion to move in the distal direction, so that the switching member moves from the second equilibrium state to the first equilibrium state. The second location area enters the first location area.
11. The firing switching mechanism of claim 4, further comprising a second biasing member configured to apply a biasing force to the locking member to rotate in the second direction.
12. The firing switching mechanism according to claim 11, wherein the locking member is rotatably connected to the first end of the first handle component through a rotary connection part, and the second biasing member is a tension spring, The tension spring is connected between the first spring fixing part of the first handle component and the second spring fixing part of the locking member, and the tension spring and the locking part are both located on the rotating connection part the proximal side.
13. The firing switching mechanism according to claim 2, wherein the second handle component includes a second handle groove, the second handle groove includes the first position area and the second position area, and the The switching piece is at least partially inserted into the second handle groove.
14. The firing switching mechanism according to claim 13, wherein the second handle groove includes a switching groove and a relief groove, the relief groove is connected to the distal end of the switching groove, and the first position area and the second position area are respectively located at the distal end and the proximal end of the switching groove. When the switching member is in the first position area and the first handle component rotates in the first direction, the switching member Enter the said give way.
15. The firing switching mechanism according to claim 14, wherein the second handle component includes a support part, the second handle groove is provided in the support part, and the relief groove is in contact with the switching groove. The distal ends are connected with arc-shaped grooves. When the support part is in the second initial position, the switching groove extends in the axial direction.
16. The firing switching mechanism according to claim 14, wherein the first handle component includes including a handle body, the handle body is provided with a first handle groove, the switching member at least partially enters the first handle groove, when the handle body is in the first initial position, the first handle groove extends along the axial direction, and The first handle groove and the switching groove at least partially overlap.
17. The firing switching mechanism according to claim 13, wherein the second handle part includes a firing part and a support part, the first end of the first handle part at least partially enters the inside of the support part, and the firing part The component is rotatably connected to the firing component, and the support portion is provided with the second handle groove.
18. The firing switching mechanism of claim 17, wherein the locking member is located between the first handle component and the support portion.
19. The firing switching mechanism according to claim 17, wherein the handle assembly includes a first resisting portion, the housing of the stapler is provided with a first limiting portion, and in the initial state, the first limiting portion The bit portion resists the first resisting portion to limit the movement of the handle assembly in a second direction, and the second direction is opposite to the first direction.
20. The firing switching mechanism according to claim 19, wherein the first resisting part is provided on the first handle part and the second handle part; or, the first resisting part is provided on the The first handle component, the second handle component at least partially resists the first resisting part; or the first resisting part is provided on the second handle component.
21. The firing switching mechanism according to claim 19, wherein the support part is rotatably connected to the first handle component through a handle pin, and a third biasing member is provided at the handle pin and is configured as The support portion exerts a biasing force to rotate in the second direction relative to the first handle member.
22. The firing switching mechanism according to claim 17, further comprising an actuating rod, the firing member including a third state away from the actuating rod and a fourth state close to the actuating rod, the The firing member includes a second resisting part, and the housing of the stapler is provided with a second limiting part. In the initial state, the second limiting part resists the second resisting part to hold the The firing member remains in the third state.
23. The firing switching mechanism according to claim 22, further comprising a fourth biasing member configured to apply a biasing force to the firing member to rotate in the second direction.
24. The firing switching mechanism of claim 21, wherein the first handle component is rotatably connected to the housing of the stapler, and the firing switching mechanism further includes a fifth biasing member configured to provide the The first handle member applies a biasing force causing it to rotate in the second direction.
25. A surgical stapler, characterized by comprising the firing switching mechanism according to any one of claims 1 to 24.