WO2024017102A1 - 击发机构及外科吻合器 - Google Patents

击发机构及外科吻合器 Download PDF

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Publication number
WO2024017102A1
WO2024017102A1 PCT/CN2023/106890 CN2023106890W WO2024017102A1 WO 2024017102 A1 WO2024017102 A1 WO 2024017102A1 CN 2023106890 W CN2023106890 W CN 2023106890W WO 2024017102 A1 WO2024017102 A1 WO 2024017102A1
Authority
WO
WIPO (PCT)
Prior art keywords
handle
firing
linkage
firing mechanism
handle component
Prior art date
Application number
PCT/CN2023/106890
Other languages
English (en)
French (fr)
Inventor
史晓杰
Original Assignee
天臣国际医疗科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202221853256.3U external-priority patent/CN217960201U/zh
Priority claimed from CN202210841928.7A external-priority patent/CN117442279A/zh
Application filed by 天臣国际医疗科技股份有限公司 filed Critical 天臣国际医疗科技股份有限公司
Publication of WO2024017102A1 publication Critical patent/WO2024017102A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously

Definitions

  • This application relates to the technical field of medical devices, specifically a firing mechanism and a surgical stapler.
  • 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.
  • a safety mechanism is added.
  • 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.
  • the purpose of this application is to provide a firing mechanism and a surgical stapler that can avoid misfiring when the stapler is not ready for firing, and when the stapler is not ready for firing, the first handle component It can still be held and rotated to avoid structural damage to the handle.
  • An embodiment of the present application provides a firing mechanism for a surgical stapler.
  • the firing mechanism includes an actuating rod and a handle assembly.
  • the handle assembly includes:
  • a first handle component is provided with a first handle groove, the first handle groove includes a first position area and a second position area;
  • the second handle part includes a linkage member at least partially located in the first handle groove and a firing member, the firing member being movable in a first state away from the actuating rod and close to the actuating rod. Switch between the second state Change;
  • the first handle component drives the second handle component to rotate in the first direction through the linkage.
  • the firing member enters the second state and drives the actuating rod to move in the distal direction.
  • the first handle slot includes a connected switching slot and a relief slot
  • the switching slot includes the first position area and the second position located on the proximal side of the first position area. area, when the linkage member is in the first position area and the first handle component rotates in the first direction, the linkage member enters the relief groove.
  • the relief groove is an arc-shaped groove connected with the first position area of the switching groove.
  • the switching groove when the first handle component is in the first initial position, the switching groove extends axially.
  • one end of the second handle component is further provided with a support portion, the firing member is rotatably connected to the support portion, the support portion is provided with a second handle slot, and the first handle component When in the first initial position, the second handle slot at least partially coincides with the switching slot, and the linkage member is at least partially located in the second handle slot.
  • the proximal end of the linkage member is further provided with a sliding member, the sliding member is at least partially located inside the support part, and the linkage member enters the second position from the first position area. region, the sliding member moves in the axial direction toward the proximal side.
  • the second handle component further includes a first biasing member configured to apply a biasing force to the support portion to rotate in the second direction, and the first biasing member is configured to apply a biasing force to the support portion to rotate in the second direction.
  • the second direction is opposite to the first direction.
  • the housing of the stapler is provided with a first limiting portion
  • the handle assembly is provided with a first resisting portion
  • the first limiting portion is located near the first resisting portion.
  • the first limiting part resists the first resisting part to block the movement of the handle assembly in the second direction.
  • the first resisting portion is provided on the first handle part and the second handle part;
  • the first resisting portion is provided on the first handle component, and the second handle component at least partially resists the first resisting portion;
  • the first resisting portion is provided on the second handle component.
  • the support part and the first handle component are rotatably fixed to the housing of the stapler through the same handle pin, and the first biasing member is disposed on the handle pin. of torsion spring.
  • the housing of the stapler is provided with a second limiting part
  • the firing part includes a second resisting part
  • the second resisting part is pressed against the second resisting part to prevent the firing member from entering the second state
  • the linkage member is located in the second position area, and the second handle component is along the first direction.
  • the second handle component further includes a locking member, the locking member is pivotally disposed on the support portion, the locking member includes a locking portion, and the locking member can be driven When switching between the third position and the fourth position, the linkage member is in the first position area and the locking member is in the third position, blocking the linkage member from moving toward the second position area. sports.
  • the locking member is located between the first handle component and the support portion.
  • the second handle component further includes a second biasing member configured to apply a biasing force to the linkage member to move toward the second position region, When the locking member is in the fourth position, the second biasing member drives the linkage member to move from the first position area to the second position area.
  • the locking member when the locking member is in the third position and the locking member rotates in the first direction, the locking member enters the fourth position.
  • a safety button is also provided on the distal side of the locking member.
  • the safety button is arranged in the axial direction. When the safety button is driven to move toward the proximal side, the locking member is driven. Rotate from the third position into the fourth position.
  • the opposite surfaces of the safety button and the locking member are respectively two inclined planes with the same inclination direction.
  • the inclined planes drive the safety button and the locking member.
  • the locking member rotates from the third position to the fourth position.
  • the second handle component further includes a third biasing member.
  • the third biasing member drives the locking member.
  • the component rotates in the second direction to enter the third position, and the locking portion is located on the proximal end side of the linkage component.
  • the linkage member when the linkage member is driven to move from the second position area to the first position area, the linkage member drives the locking member from the third position to the fourth position. The position is rotated so that the linkage moves to the distal side of the locking portion and returns to the first position region.
  • the proximal surface of the locking part is a guide surface, and/or the distal surface of the locking part is a vertical surface.
  • the firing member is rotatably connected to the support portion through a firing member pin
  • the third biasing member is a torsion spring provided on the firing member pin, and the torsion spring Both ends resist the firing part and the locking part respectively.
  • the locking member is rotatably connected to the support part through a pin or a boss
  • the first handle component is also provided with a relief portion
  • the linkage member is in the first position area. And when the first handle component rotates along the first direction, the pin or boss at least partially enters the relief portion.
  • a closed link assembly is further included, the closed link assembly includes a first equilibrium state and a second equilibrium state, the closed link assembly is in the first equilibrium state and the first handle component is along the When rotating in the first direction, the closing link assembly is driven to move at least partially in the proximal direction and enter the second equilibrium state;
  • the closing link assembly includes a fourth fitting portion, and the slider further includes a third fitting portion.
  • the fourth fitting portion resists the third fitting portion.
  • Three fitting parts are used to block the movement of the sliding member in the proximal direction.
  • the fourth fitting part drives the third fitting part to move in the distal direction, Therefore, the linkage member returns from the second position area to the first position area.
  • An embodiment of the present application also provides a surgical stapler, including the above firing mechanism.
  • the linkage when the stapler is not ready for firing, the linkage is in the first position area, the first handle part cannot drive the second handle part to rotate, and the firing part is in the first state and the stapler cannot be fired, thereby avoiding anastomosis.
  • the stapler when the stapler is not ready for firing, the first handle part can still be held and rotated to avoid damage to the handle structure.
  • the stapler When the stapler is in a firing state, the linkage enters the second The position area allows the first handle component and the second handle component to be linked. When the first handle component rotates, it drives the second handle component to rotate, and the firing part enters the second state, so that the stapler can be fired normally.
  • Figure 1 is a schematic structural diagram of a stapler according to an embodiment of the present application.
  • Figure 2 is a partial schematic diagram of the stapler after removing the stapler shell according to an embodiment of the present application
  • Figure 3 is a schematic diagram of the cooperation between the firing mechanism and the stapler housing according to an embodiment of the present application
  • Figure 4 is an enlarged view of point A in Figure 4.
  • Figure 5 is a schematic structural diagram of a handle assembly according to an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a handle assembly according to an embodiment of the present application.
  • Figure 7 is a front view of the first handle component according to an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of the second handle component, the locking member and the safety button according to an embodiment of the present application;
  • Figure 9 is a schematic structural diagram of the cooperation between the second handle component and the locking component according to an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of the second handle component according to an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of the process of holding the first handle component when the stapler according to an embodiment of the present application is in a non-firing state
  • Figure 12 is a schematic structural diagram after holding the first handle component when the stapler according to an embodiment of the present application is in a non-firing state
  • Figure 13 is a schematic structural diagram of a safety button driving locking piece according to an embodiment of the present application.
  • Figure 14 is a schematic structural diagram after the linkage moves to the second position area according to an embodiment of the present application.
  • Figure 15 is a schematic structural diagram of the process of holding the first handle component when the stapler according to an embodiment of the present application is in a firing state
  • Figure 16 is a partial structural schematic diagram of the process of holding the first handle component when the stapler according to an embodiment of the present application is in a firing state
  • Figure 17 is a schematic structural diagram of the driving slider when the closed link assembly is reset according to an embodiment of the present application.
  • Figure 18 is a schematic structural diagram of the firing mechanism after the closed link assembly is reset according to an embodiment of the present application.
  • 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” may mean “and” or “or”.
  • 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.
  • the present application provides a firing mechanism for a surgical stapler and a surgical stapler including the firing mechanism.
  • the stapler includes a non-firing state when it is not ready for firing and a firing state when it is ready for firing.
  • the firing mechanism includes an actuating lever and a handle assembly, the handle assembly includes a first handle part and a second handle part, the first handle part is provided with a first handle groove, the first handle groove includes a first position area and a second location area.
  • the second handle component includes a linkage member and a firing member, the linkage member is at least partially located in the first handle slot, and the linkage member can be between a first position area and a second position area of the first handle slot.
  • the firing member is switchable between a first state away from the actuating rod and a second state close to the actuating rod.
  • the linkage member When the stapler is not ready for firing, the linkage member is located in the first position area.
  • the first handle component rotates in the first direction, the first handle component rotates relative to the linkage member, so The second handle component is not linked with the first handle component, and the firing member is in the first state, so the actuating rod will not be driven and the stapler will not be fired, so the stapler is in an inoperable state. firing state.
  • misfiring when the stapler is not ready for firing can be avoided, and even if the stapler is in a non-firing state, when the operator holds the first handle part, the first handle part can still rotate, so that the handle assembly will not be damaged. casing.
  • the linkage member After the stapler is ready for firing, the linkage member is located in the second position area. At this time, the stapler enters the firing state.
  • the first handle component rotates along the first direction
  • the The first handle part drives the second handle part to rotate through the linkage part
  • the firing part enters the second state and drives the actuating rod to move in the distal direction, so that the stapler can be fired normally.
  • 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 includes a non-firing state when it is not ready for firing and a firing state when it is ready for firing. After the stapler enters the firing state, it can be held by holding the The handle assembly is rotated as a whole along the first direction toward the fixed handle 82 to fire the stapler.
  • 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 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.
  • the distal side of the stapler is the right side and the proximal 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.
  • S1 direction or the direction opposite to the S1 direction as the axial direction of the stapler.
  • S2 direction in Figure 1 as the longitudinal direction, that is, the height direction.
  • the R1 direction shown in Figure 11 is defined as the first direction. In the perspective of Figure 11, the first direction is the clockwise direction.
  • the direction opposite to the R1 direction is defined as the second direction. In the perspective of Figure 11, the second direction The direction is counterclockwise.
  • the firing mechanism includes an actuating rod and the handle assembly.
  • the actuating rod is a rack 6, and a plurality of driving teeth 61 are provided on one side of the rack 6 toward the handle assembly.
  • the handle assembly includes a first handle part 1 and a second handle part 2 .
  • the first handle component 1 includes a first end 11 and a second end 12.
  • the second end 12 of the first handle component 1 is an end for an operator to hold.
  • the first end 11 of the first handle component 1 is provided with a first handle groove 13.
  • the first handle groove 13 includes a first position area (the position area shown as 13a in Figure 7) and a second position area (13b in Figure 7 location area shown).
  • the first handle groove 13 includes a switching groove 131 and an arc-shaped relief groove 132.
  • the switching groove 131 extends in the axial direction.
  • the first position area and the second position area are distributed in the switching groove 131, and the first position area is located on the distal side of the second position area.
  • a handle return spring 84 is provided between the first handle component 1 and the housing 81 to give the first handle component 1 a biasing force to return in the second direction.
  • the first handle part 1 When the first handle part 1 is not held, the first handle part 1 is in a first initial position away from the fixed handle 82. When the first handle part 1 is held, the first handle part 1 is in a first initial position from the first initial position. The position is rotated along the first direction R1 (shown in Figure 11) to a position close to the fixed handle 82, and the handle return spring 84 undergoes elastic deformation. After the first handle component 1 is released, the handle return spring Under the action of the elastic deformation restoring force 84, the first handle component 1 rotates in the second direction and returns to the first initial position away from the fixed handle 82.
  • the handle return spring 84 may be a tension spring, but the application is not limited to this. In other embodiments, Compression springs, torsion springs, elastic sheets, etc. can also be used.
  • the second handle component 2 includes a support portion 21 .
  • the support part 21 and the first handle component 1 are rotatably fixed to the housing 81 of the stapler through a handle pin 31 .
  • the second handle part 2 further includes a first biasing member configured to apply a biasing force to the second handle part 2 to rotate in the second direction.
  • the first biasing member is a bracket torsion spring 32 that is sleeved on the handle pin 31. One end of the bracket torsion spring 32 resists the support portion 21, and the other end of the bracket torsion spring 32 resists the support portion 21. One end foot resists the first handle component 1 .
  • the housing 81 of the stapler is provided with a first limiting part 811 , and the supporting part 21 includes a first resisting part 27 .
  • the first limiting portion 811 resists the first resisting portion 27 to block the movement of the supporting portion 21 in the second direction in the initial state and restrict the supporting portion 21 .
  • a first resisting portion can also be provided on the first handle component 1, and in the initial state, the second handle component 2 resists the first resisting portion, and the first resisting portion resists
  • the first limiting portion 811 of the housing 81 is provided to block the movement of the first handle component 1 and the second handle component 2 in the second direction in the initial state.
  • 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.
  • a first installation groove 212 is provided inside the support part 21 .
  • a sliding member 23 is provided in the first installation groove 212 and can move along the axial direction.
  • a linkage piece 24 is provided on one side of the sliding piece 23 .
  • a second handle groove 211 extending in the axial direction is provided on one side of the support portion 21 .
  • the linkage member 24 is a convex shaft. The linkage member 24 enters the second handle groove 211 and the first handle groove 13 at the same time, and the linkage member 24 can move between the first position area and the first handle groove 13 along the switching groove 131 . Movement between two position areas.
  • the second handle groove 211 When the first handle component 1 is in the first initial position, the second handle groove 211 at least partially coincides with the first position area of the switching groove 131, and the linkage member 24 enters the second handle groove.
  • the overlapping portion of 211 and the switching groove 131 is located in the first position area.
  • a second biasing member is also provided in the first mounting groove 212.
  • the second biasing member is configured to apply a biasing force to the sliding member 23 to move it toward the proximal direction, that is, to indirectly impart a biasing force to the sliding member 23.
  • the linkage 24 has a biasing force that moves toward the second position area.
  • the second biasing member is a sliding member compression spring 25 , which is disposed between the distal end side of the sliding member 23 and the inner wall of the first mounting groove 212 .
  • the second biasing member may also be a tension spring, a torsion spring, a spring, etc.
  • the second handle component 2 further includes a firing member 22.
  • the firing member 22 is a firing pawl, and the firing member 22 is rotatable through a firing member pin 261.
  • Ground is connected to the support part twenty one.
  • the firing member 22 is switchable between a first state away from the rack 6 and a second state close to the rack 6 .
  • being far away from and approaching the rack 6 are relative terms, that is, the firing member 22 in the second state is closer to the rack 6 than the firing member 22 in the first state.
  • the firing member 22 includes a rack driving part 222, and the rack driving part 222 in the second state is closer to the rack 6 than the rack driving part 222 in the first state.
  • the second handle component 2 further includes a third biasing member configured to apply a biasing force to the firing member 22 to rotate in the second direction.
  • the third biasing member is a firing member torsion spring 262 that is sleeved on the firing member pin 261. One end of the firing member torsion spring 262 resists the firing member. 26.
  • the housing 81 of the stapler is also provided with a second limiting portion 812 , and the firing member 22 further includes a second resisting portion 221 . In the initial state, the second limiting portion 812 resists the second resisting portion 221 to maintain the firing member 22 in the first state.
  • the second limiting part 812 will be separated from the second resisting part 221, and the biasing force of the torsion spring 262 of the firing part will act. , the firing member 22 will rotate in the second direction and enter the second state.
  • the linkage 24 When the stapler is not ready for firing, the linkage 24 is located in the first position area, and the stapler is in a non-firing state.
  • the first handle part 1 rotates in the first direction
  • the second handle part 1 rotates in the first direction.
  • One handle part 1 rotates relative to the linkage part 24, and the second handle part 2 is not linked with the first handle part 1, so the second handle part 2 does not rotate, and at this time the firing part 22 is in the position In the first state, the rack 6 will not be driven and the stapler will not be fired.
  • the second handle groove 211 at least partially coincides with the relief groove 132 , and the linkage member 24 enters the relief groove 132 to prevent the linkage member 24 from contacting the first handle component 1 Interference occurs.
  • the linkage member 24 is located in the second position area. At this time, the stapler enters the firing state.
  • the first handle part 1 rotates along the first direction
  • the first handle part 1 drives the support part 21 and the firing part 22 of the second handle part 2 to rotate through the linkage part 24, and the firing part 22 enters the second state and drives the rack 6 toward The distal side moves so that the stapler can be fired normally.
  • the firing mechanism also includes a locking member 5 and a safety button 41.
  • the safety button 41 is located on the distal side of the locking member 5, and the safety button 41 can be operated. Movement along the axis.
  • the locking member 5 is located between the first handle part 1 and the supporting part 21 .
  • the housing 81 of the stapler is provided with a second mounting groove 813 (shown in FIG. 3 ), and the safety button 41 at least partially enters the housing 81 of the stapler. department.
  • the safety button 41 includes an operating part 411 located at least partially outside the housing 81 and a first fitting part 412 located at the proximal end.
  • the locking part 5 includes a locking part 53 at the proximal end, a second fitting part 54 at the distal end, and a rotary connection part 51 between the locking part 53 and the second fitting part 54.
  • the locking part 5 5 is rotatably connected to the support part 21 through the rotary connection part 51.
  • the two opposite side surfaces of the first fitting part 412 and the second fitting part 54 are inclined surfaces with the same inclination direction, so that when the first fitting part 412 moves in the proximal direction, through the cooperation of the two inclined surfaces, The axial movement of the safety button 41 is converted into a rotational movement of the locking member 5 .
  • the locking member 5 can be driven by the safety button 41 to rotate and switch between the third position and the fourth position.
  • Figure 8 shows the third position of the locking member 5.
  • the locking portion 53 It is located on the proximal side of the linkage member 24 and blocks the movement of the linkage member 24 toward the second position area.
  • Figure 13 shows the fourth position of the locking member 5.
  • the locking member 5 is rotatably provided on the handle assembly.
  • the first fitting part 412 drives the second fitting part 54 so that the locking The member 5 rotates along the first direction and enters the fourth position.
  • the locking portion 53 no longer blocks the movement of the linkage member 24 in the proximal direction.
  • the sliding member 23 is in the sliding member compression spring 25
  • the linkage member 24 is driven to move proximally along the D2 direction to the second position area.
  • the rotary connection portion 51 of the locking member 5 is rotatably connected to the support portion 21 through a pin or boss, and the first handle component 1 also A giving-out portion 111 is provided to make way for the pin or the boss.
  • the pin When the linkage 24 is in the first position area and the first handle component 1 rotates in the first direction, the pin The shaft or boss at least partially enters the relief portion 111 .
  • the pin or the boss is provided on the rotary connection part 51 or the support part 21 .
  • the locking member 5 is further provided with a torsion spring resisting portion 52 , which is located between the rotating connection portion 51 and the locking portion 53 .
  • One end foot of the firing member torsion spring 262 resists the firing member 22, and the other end foot resists the torsion spring resisting portion 52 of the locking member 5.
  • the firing member torsion spring 262 is configured as A biasing force is applied to the locking member 5 to rotate in the second direction.
  • a safety button compression spring 42 is also provided on the proximal side of the operating portion 411 of the safety button 41 to apply a biasing force toward the distal side of the safety button 41 .
  • the safety button 41 when the safety button 41 is released, the safety button 41 will return to the position when no external force is applied to press the safety button 41 under the action of the safety button compression spring 42 , and the first The fitting portion 412 no longer acts on the second fitting portion 54 .
  • the locking member 5 will return to the position shown in the figure under the action of the torsion spring 262 of the firing member. 8 shows the third position.
  • the reset of the locking member 5 and the firing member 22 are both realized through the third biasing member, that is, the firing member torsion spring 262.
  • the resetting of the locking member 5 and the resetting of the firing member 22 may be achieved by using two separate biasing members.
  • one end of the firing member torsion spring 262 is provided to resist the firing member 22, and the other end foot is provided to resist the support portion 21.
  • the firing member torsion spring 262 can also be replaced with a compression spring. Tension springs, springs, etc.
  • a locking member torsion spring is provided to apply a biasing force to the locking member 5 to rotate in the second direction.
  • One end of the locking member torsion spring resists the support portion 21 and the other end
  • the foot resists the locking member 5, and the torsion spring of the locking member can also be replaced by a compression spring, a tension spring, a spring, etc.
  • the stapler is also provided with a closing link assembly 7.
  • the closing link assembly 7 includes a first rod 71, a second rod 72, a closing pull rod 74 and a closing pull rod. Film 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 connecting rod fixing portion 814 of the housing 81 through the first pin 731, so that the first rod 71 only has rotational movement relative to the housing 81, and There is no axial movement.
  • 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 first handle part 1 also includes a closing drive 14 .
  • 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.
  • 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.
  • the second pin 732 Located at a position close to the rack 6, the closing 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 14 of the first handle part.
  • 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.
  • a closing pin 93 is inserted into the first fitting groove 911 and the second fitting groove 921 at the same time.
  • the distal end of the closing pull tab 75 is connected to the closing pin 93 .
  • the closing link assembly 7 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.
  • the first handle part 1 is held, and the first handle part 1 rotates in the first direction, the closing driver 14 drives the first rod 71 to rotate in the first direction, and the second rod 72 drives the closing pull rod 74 to move closer. Movement in the end-side direction, the closing pull rod 74 drives the closing pull tab 75 to move in the proximal direction, and the closing link assembly 7 enters the second equilibrium state.
  • 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 in which the nail anvil 91 enters 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.
  • the closing process of the nail head 9 that is, the closing process of the stapler.
  • the closing pin 93 and the closing pull tab 75 are driven to move in the distal direction, the nail head 9 can be opened again through the closing pin 93 .
  • the closed link assembly 7 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. At this time, the stapler has not completed firing preparations and is in a non-firing state.
  • the first handle part 1 is in a first initial position away from the fixed handle 82 .
  • the locking part 5 is in the third position, and the locking part 53 locks the linkage part 24 in the first position area of the switching groove 131, and the stapler is in a non-firing state. Under the blocking action of the locking portion 53 , the sliding member 23 elastically deforms when compressing the sliding member compression spring 25 .
  • the first resisting portion 27 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. 4 .
  • 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 first 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.
  • a fourth fitting portion 714 is also provided on the side of the first rod 71 facing the second handle component 2 .
  • the fourth fitting portion 714 resists the third fitting portion 231 of the sliding member 23 so that the sliding member 23 cannot move in the proximal direction.
  • the linkage member 24 cannot enter the position. above the second position area, it is impossible to drive the stapler into the strikeable hair status. Therefore, under the dual action of the locking part 5 and the fourth matching part 714, the linkage part 24 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.
  • the drive handle return spring 84 elastically deforms, and the linkage member 24 Enter the relief groove 132 connected with the switching groove 131 and move along the relief groove 132 to avoid interference between the linkage member 24 and the first handle component 1 due to non-rotation of the support portion 21 .
  • the second handle part 2 is not linked with the first handle part 1 .
  • the support part 21 still remains in the second 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 is still in the
  • the second limiting part 812 is maintained in the first state under the action of the second limiting part 812 and will not contact the driving teeth 61 of the rack 6, so the stapler will not be fired.
  • the closing driving member 14 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 causes the second end of the second rod 72 to move toward the proximal side, and the second rod 72 drives the closing pull rod 74 and the closing pull tab 75 toward the proximal side.
  • directional movement to gradually close the nail head until the stapler enters the state shown in Figure 12.
  • the closing link assembly 7 enters the second equilibrium state, and the nail head completes closing.
  • the first handle part 1 when the first handle part 1 is released, the first handle part 1 will return to its initial position under the action of the handle return spring 84, because the closing link assembly 7 is in a self-balancing second position. In the equilibrium state, even if the driving effect of the first handle component 1 is lost, it will not return to the first equilibrium state, and the stability of the closure of the nail head can be maintained. After the nail head is closed, the preparation for firing the stapler is completed.
  • the closing link assembly 7 is in the second equilibrium state, and the fourth matching portion 714 of the first rod 71 no longer resists the sliding member.
  • the safety button 41 is pressed, causing the safety button 41 to move toward the proximal direction, the safety button compression spring 42 is compressed and elastically deformed, and the first fitting portion 412
  • the second fitting portion 54 is driven to rotate the locking member 5 in the first direction and enter the fourth position, thereby releasing the linkage member 24 .
  • the linkage member 24 After the linkage member 24 loses the blocking effect of the locking portion 53, it will move toward the proximal direction and enter the second position area under the action of the elastic deformation restoring force of the sliding member compression spring 25. Release the safety button 41, and the safety button 41 will move to the distal side under the biasing force of the safety button compression spring 42 and no longer compress the locking member 5.
  • the locking member 5 will The firing member rotates in the second direction under the action of the torsion spring 262 and returns to the third position. At this time, the linkage 24 moves to the proximal side of the locking portion 53 and stays in the second position. area. At this time, the stapler enters a firing state.
  • the completion of the firing preparation of the stapler refers to the completion of closure of the nail head of the stapler.
  • the switching between the firing state and the non-firing state of the stapler is realized by switching the position of the linkage 24.
  • the stapler When the linkage piece 24 is located in the first position area of the switching slot 131, the stapler is in a non-firing state.
  • the stapler enters the The firing state.
  • the support part 21 drives the firing part 22 to rotate in the first direction from the second initial position, and the second resisting part 221 of the firing part 22 no longer resists the second limiting part 812.
  • the firing member 22 rotates in the second direction relative to the support part 21 and enters the second state.
  • the rack driving part 222 of the firing member 22 is in contact with the The driving teeth 61 of the rack 6 are engaged.
  • the first handle part 1 continues to drive the second handle part 2 to rotate in the first direction, and the firing part 22 drives the rack 6 to move in the distal direction to fire. stapler.
  • the first handle part 1 After the stapler is fired, the first handle part 1 is released, and the first handle part 1 rotates in the second direction to return to its first initial position under the action of the handle return spring 84, and the second handle part 2 is at the same position. Under the action of the bracket torsion spring 32, the support portion 21 rotates in the second direction and returns to the first limiting portion 811 to resist the first resisting portion 27 again, and the supporting portion 21 returns to the second initial position. Therefore, the first resisting portion 27 defines the second initial position of the supporting portion 21 .
  • the nail head needs to be opened again.
  • the closed link assembly 7 is driven to return from the second equilibrium state to the first equilibrium state.
  • the first rod 71 moves in the second direction, and the fourth position of the first rod 71
  • the fitting portion 714 drives the third fitting portion 231 of the slider 23 so that the slider 23 moves toward the distal side.
  • the linkage member 24 moves distally with the sliding member 23.
  • the linkage member 24 cooperates with the proximal surface 531 of the locking portion 53 to lock the locking portion 53.
  • the locking member 5 Lift upward, the locking member 5 enters the fourth position without blocking the movement of the linkage member 24 in the distal direction, and the linkage member 24 moves to the distal side of the locking portion 53
  • the locking member 5 loses the function of the linkage member 24 and rotates in the second direction under the biasing force of the torsion spring 262 of the firing member and returns to the third position again.
  • the linkage 24 is locked in the first position area, the stapler enters the non-firing state shown in Figure 18 again, 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 rotate again.
  • the stapler is fired through the second handle part 2, thereby effectively preventing accidental secondary firing of the stapler. As shown in FIG.
  • the proximal end surface 531 of the locking part 53 is an inclined guide surface, so that the linkage member 24 moves in the distal direction to push up the locking part 53 more efficiently.
  • the distal surface of the locking portion 53 is a vertical surface, so that when the locking portion 53 locks the linkage member 24 in the first position area, the distance between the linkage member 24 and the locking portion 53 The fit is more stable.

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Abstract

一种击发机构及外科吻合器，击发机构包括致动杆和把手组件，把手组件包括：第一把手部件（1），设置有第一把手槽（13），其包括第一位置区域（13a）和第二位置区域（13b）；第二把手部件（2），包括联动件（24）和击发件（22），联动件（24）至少部分位于第一把手槽（13）中；其中，联动件（24）位于第一位置区域（13a）且第一把手部件（1）沿第一方向旋转时，第一把手部件（1）相对于联动件（24）旋转，第二把手部件（2）不与第一把手部件（1）联动，且击发件（22）处于远离致动杆的第一状态，此时不会击发吻合器；联动件（24）位于第二位置区域（13b）且第一把手部件（1）沿第一方向旋转时，第一把手部件（1）通过联动件（24）驱动第二把手部件（2）沿第一方向旋转，且击发件（22）进入靠近致动杆的第二状态并驱动致动杆向远端侧方向运动，从而实现吻合器的正常击发。

Description

击发机构及外科吻合器 技术领域
本申请涉及医疗器械技术领域，具体涉及一种击发机构及外科吻合器。
背景技术
外科吻合器包括吻合器本体、活动连接所述吻合器本体的击发把手以及与所述本体配合的钉头部。所述钉头部包括相对设置的钉仓组件和钉砧。在手术时，首先握持击发把手，通过闭合驱动机构拉动闭合拉片向吻合器的近端侧运动，从而将钉仓组件和钉砧闭合而达到可击发状态。在可击发状态下，再次握持击发把手，通过击发把手的击发件驱动致动杆向远端侧方向运动，进而推动吻合钉向组织运动，通过钉仓组件中的吻合钉在钉砧处的成型，将组织吻合，同时切刀向远端侧运动，而切割组织。
现有的外科吻合器中，在吻合器未做好击发准备时，为了避免吻合器的误击发，会增加保险机构，在保险机构处于保险状态时，击发把手无法旋转驱动致动杆。然后在增加了保险机构之后，如果在吻合器未做好击发准备时，操作者用力握持击发把手，虽然避免了吻合器的误击发，但是保险机构的阻挡力和操作者的握持力同时作用在击发把手上，可能会造成击发把手外壳的开裂，给操作者的使用体验不好。
发明内容
针对现有技术中的问题，本申请的目的在于提供一种击发机构及外科吻合器，可以避免吻合器未完成击发准备时的误击发，并且在吻合器未做好击发准备时，第一把手部件仍然可以被握持而旋转，避免把手结构损坏。
本申请实施例提供一种击发机构，用于外科吻合器，所述击发机构包括致动杆和把手组件，所述把手组件包括：
第一把手部件，设置有第一把手槽，所述第一把手槽包括第一位置区域和第二位置区域；
第二把手部件，包括联动件和击发件，所述联动件至少部分位于所述第一把手槽中，所述击发件可在远离所述致动杆的第一状态和靠近所述致动杆的第二状态之间切 换；
其中，所述联动件位于所述第一位置区域且所述第一把手部件沿第一方向旋转时，所述第一把手部件相对于所述联动件旋转，所述第二把手部件不与所述第一把手部件联动，且所述击发件处于所述第一状态；
所述联动件位于所述第二位置区域且所述第一把手部件沿所述第一方向旋转时，所述第一把手部件通过所述联动件驱动所述第二把手部件沿所述第一方向旋转，且所述击发件进入所述第二状态并驱动所述致动杆向远端侧方向运动。
在一些实施例中，所述第一把手槽包括相连通的切换槽和让位槽，所述切换槽包括所述第一位置区域和位于所述第一位置区域近端侧的所述第二位置区域，所述联动件处于所述第一位置区域且所述第一把手部件沿所述第一方向旋转时，所述联动件进入所述让位槽。
在一些实施例中，所述让位槽为与所述切换槽的第一位置区域相连通的弧形槽。
在一些实施例中，所述第一把手部件处于第一初始位置时，所述切换槽沿轴向延伸。
在一些实施例中，所述第二把手部件的一端还设有支撑部，所述击发件可旋转地连接于所述支撑部，所述支撑部设置有第二把手槽，所述第一把手部件处于所述第一初始位置时，所述第二把手槽至少部分与所述切换槽重合，且所述联动件至少部分位于所述第二把手槽中。
在一些实施例中，所述联动件的近端还设有滑动件，所述滑动件至少部分位于所述支撑部的内部，所述联动件从所述第一位置区域进入所述第二位置区域时，所述滑动件沿轴向向近端侧方向运动。
在一些实施例中，所述第二把手部件还包括第一偏置件，所述第一偏置件配置为给所述支撑部施加使其沿第二方向旋转的偏置力，所述第二方向与所述第一方向相反。
在一些实施例中，所述吻合器的壳体设置有第一限位部，所述把手组件设有第一抵持部，所述第一限位部位于所述第一抵持部的近端侧，初始状态下，所述第一限位部抵持于所述第一抵持部，以阻挡所述把手组件沿所述第二方向的运动。
在一些实施例中，所述第一抵持部设于所述第一把手部件和所述第二把手部件；
或，所述第一抵持部设于所述第一把手部件，所述第二把手部件至少部分抵持于所述第一抵持部；
或，所述第一抵持部设于所述第二把手部件。
在一些实施例中，所述支撑部与所述第一把手部件通过同一把手销轴可旋转地固定于所述吻合器的壳体，所述第一偏置件为设置于所述把手销轴上的扭簧。
在一些实施例中，所述吻合器的壳体设置有第二限位部，所述击发件包括第二抵持部，所述击发件处于所述第一状态时，所述第二限位部抵持于所述第二抵持部，以阻挡所述击发件进入所述第二状态；所述联动件位于所述第二位置区域，且所述第二把手部件沿所述第一方向旋转时，所述击发件与所述第二限位部分离而进入所述第二状态。
在一些实施例中，所述第二把手部件还包括锁止件，所述锁止件枢轴设置于所述支撑部，所述锁止件包括锁止部，所述锁止件可被驱动在第三位置和第四位置之间切换，所述联动件处于所述第一位置区域且所述锁止件位于所述第三位置时，阻挡所述联动件朝向所述第二位置区域的运动。
在一些实施例中，所述锁止件位于所述第一把手部件和所述支撑部之间。
在一些实施例中，所述第二把手部件还包括第二偏置件，所述第二偏置件配置为给所述联动件施加使其朝向所述第二位置区域运动的偏置力，所述锁止件位于所述第四位置时，所述第二偏置件驱动所述联动件从所述第一位置区域运动至所述第二位置区域。
在一些实施例中，所述锁止件处于所述第三位置且所述锁止件沿所述第一方向旋转时，所述锁止件进入所述第四位置。
在一些实施例中，所述锁止件的远端侧还设置有一保险钮，所述保险钮沿轴向设置，所述保险钮被驱动向近端侧方向运动时，驱动所述锁止件从所述第三位置旋转进入所述第四位置。
在一些实施例中，所述保险钮和所述锁止件的相对表面分别为倾斜方向相同的两个斜面，所述保险钮被驱动向近端侧方向运动时，通过所述斜面驱动所述锁止件从所述第三位置旋转至所述第四位置。
在一些实施例中，所述第二把手部件还包括第三偏置件，所述锁止件在所述第四位置且受到的外力消除后，所述第三偏置件驱动所述锁止件沿第二方向旋转而进入所述第三位置，且所述锁止部位于所述联动件的近端侧。
在一些实施例中，所述联动件被驱动从所述第二位置区域向所述第一位置区域运动时，所述联动件驱动所述锁止件从所述第三位置向所述第四位置旋转，使得所述联动件运动至所述锁止部的远端侧而返回所述第一位置区域。
在一些实施例中，所述锁止部的近端面为引导面，和/或，所述锁止部的远端面为垂直面。
在一些实施例中，所述击发件通过击发件销轴可旋转地连接于所述支撑部，所述第三偏置件为设置于所述击发件销轴的扭簧，所述扭簧的两端分别抵持于所述击发件和所述锁止件。
在一些实施例中，所述锁止件通过销轴或凸台可旋转地连接于所述支撑部，所述第一把手部件还开设有让位部，所述联动件处于所述第一位置区域且所述第一把手部件沿所述第一方向旋转时，所述销轴或凸台至少部分进入所述让位部中。
在一些实施例中，还包括闭合连杆组件，所述闭合连杆组件包括第一平衡状态和第二平衡状态，所述闭合连杆组件处于所述第一平衡状态且所述第一把手部件沿所述第一方向旋转时，驱动所述闭合连杆组件至少部分向近端侧方向运动而进入所述第二平衡状态；
所述闭合连杆组件包括第四配合部，所述滑动件还包括第三配合部，所述闭合连杆组件处于所述第一平衡状态时，所述第四配合部抵持于所述第三配合部，以阻挡所述滑动件向近端侧方向的运动。
在一些实施例中，所述闭合连杆组件被驱动从所述第二平衡状态进入所述第一平衡状态时，所述第四配合部驱动所述第三配合部向远端侧方向运动，而使得所述联动件从所述第二位置区域返回至所述第一位置区域。
本申请实施例还提供一种外科吻合器，包括上述的击发机构。
本申请所提供的击发机构及外科吻合器具有如下优点：
通过采用本申请，在吻合器未完成击发准备时，联动件处于第一位置区域，第一把手部件不能驱动第二把手部件旋转，并且击发件处于第一状态，无法击发吻合器，从而可以避免吻合器未完成击发准备时的误击发，并且在吻合器未完成击发准备时，第一把手部件仍然可以被握持而旋转，避免把手结构损坏，在吻合器处于可击发状态时，联动件进入第二位置区域而使得第一把手部件和第二把手部件联动，第一把手部件旋转时驱动第二把手部件旋转，并且击发件进入第二状态，可以正常击发吻合器。
附图说明
通过阅读参照以下附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显。
图1是本申请一实施例的吻合器的结构示意图；
图2是本申请一实施例的去除吻合器壳体后的吻合器局部示意图；
图3是本申请一实施例的击发机构与吻合器壳体配合的示意图；
图4是图4中A处放大图；
图5是本申请一实施例的把手组件的结构示意图；
图6是本申请一实施例的把手组件的结构示意图；
图7是本申请一实施例的第一把手部件的主视图；
图8是本申请一实施例的第二把手部件与锁止件和保险钮配合的结构示意图；
图9是本申请一实施例的第二把手部件与锁止件配合的结构示意图；
图10是本申请一实施例的第二把手部件的结构示意图；
图11是本申请一实施例的吻合器处于不可击发状态时，握持第一把手部件过程中的结构示意图；
图12是本申请一实施例的吻合器处于不可击发状态时，握持第一把手部件后的结构示意图；
图13是本申请一实施例的保险钮驱动锁止片的结构示意图；
图14是本申请一实施例的联动件运动至第二位置区域后的结构示意图；
图15是本申请一实施例的吻合器处于可击发状态时，握持第一把手部件过程中的结构示意图；
图16是本申请一实施例的吻合器处于可击发状态时，握持第一把手部件过程中的局部结构示意图；
图17是本申请一实施例的闭合连杆组件复位时驱动滑动件的结构示意图；
图18是本申请一实施例的闭合连杆组件复位后击发机构的结构示意图。
附图标记：
1      第一把手部件              52     扭簧抵持部
11     第一端                    53     锁止部
111    让位部                    531    近端面
12     第二端                    54     第二配合部
13     第一把手槽                6      齿条
131    切换槽                    61     驱动齿
132    让位槽                   7      闭合连杆组件
14     闭合驱动件               71     第一杆
2      第二把手部件             714    第四配合部
21     支撑部                   72     第二杆
211    第二把手槽               731    第一销轴
212    第一安装槽               732    第二销轴
22     击发件                   733    第三销轴
221    第二抵持部               74     闭合拉杆
222    齿条驱动部               75     闭合拉片
23     滑动件                   8      吻合器本体
231    第三配合部               81     壳体
24     联动件                   811    第一限位部
25     滑动件压簧               812    第二限位部
261    击发件销轴               813    第二安装槽
262    击发件扭簧               814    连杆固定部
27     第一抵持部               82     固定把手
31     把手销轴                 83     连接杆
32     支架扭簧                 84     把手复位弹簧
41     保险钮                   9      钉头部
411    操作部                   91     钉砧
412    第一配合部               911    第一配合槽
42     保险钮压簧               92     钉仓组件
5      锁止件                   921    第二配合槽
51     旋转连接部               93     闭合销
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本申请将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的结构，因而将省略对它们的重复描述。说明书中 的“或”、“或者”均可能表示“和”或者“或”。虽然本说明书中可使用术语“上”、“下”、“之间”等来描述本申请的不同示例性特征和元件，但是这些术语用于本文中仅出于方便，例如根据附图中所述的示例的方向。本说明书中的任何内容都不应理解为需要结构的特定三维方向才落入本申请的范围内。本说明书中虽然采用“第一”、“第二”、“第三”或“第四”等来表示某些特征，但其仅为表示作用，而作为具体特征的数量和重要性的限制。
本申请提供了一种用于外科吻合器的击发机构和包括该击发机构的外科吻合器。所述吻合器包括未做好击发准备时的不可击发状态和做好击发准备后的可击发状态。所述击发机构包括致动杆和把手组件，所述把手组件包括第一把手部件和第二把手部件，所述第一把手部件设置有第一把手槽，所述第一把手槽包括第一位置区域和第二位置区域。所述第二把手部件包括联动件和击发件，所述联动件至少部分位于所述第一把手槽中，且所述联动件可在所述第一把手槽的第一位置区域和第二位置区域之间运动，所述击发件可在远离所述致动杆的第一状态和靠近所述致动杆的第二状态之间切换。
所述吻合器未做好击发准备时，所述联动件位于所述第一位置区域，当所述第一把手部件沿第一方向旋转时，所述第一把手部件相对于所述联动件旋转，所述第二把手部件不与所述第一把手部件联动，且所述击发件处于所述第一状态，也就不会驱动所述致动杆，不会击发吻合器，因此所述吻合器处于不可击发状态。此时可以避免在吻合器未做好击发准备时的误击发，并且即使吻合器处于不可击发状态，在操作者握持第一把手部件时，第一把手部件仍然可以旋转，也就不会损伤把手组件的壳体。
所述吻合器做好击发准备后，所述联动件位于所述第二位置区域，此时所述吻合器进入可击发状态，当所述第一把手部件沿所述第一方向旋转时，所述第一把手部件通过所述联动件驱动所述第二把手部件旋转，且所述击发件进入所述第二状态并驱动所述致动杆向远端侧方向运动，从而可以正常击发吻合器。
下面结合附图详细介绍本申请各个具体实施例的击发机构的结构，可以理解的是，各个具体实施例不作为本申请的保护范围的限制。
如图1～3所示，本申请一实施例提供了外科吻合器及其中的击发机构。该外科吻合器包括吻合器本体8、可旋转地连接到所述吻合器本体8的把手组件和位于所述吻合器本体8的远端的钉头部9。所述吻合器包括未做好击发准备时的不可击发状态和做好击发准备后的可击发状态，所述吻合器进入所述可击发状态后，通过握持所述 把手组件，使所述把手组件整体沿所述第一方向朝所述固定把手82旋转，可以击发吻合器。所述吻合器本体8包括壳体81、固定把手82和中空的连接杆83，所述连接杆83沿吻合器的轴向延伸。所述钉头部9设置于所述连接杆83的远端。
在本申请中，远端侧和近端侧是相对于操作者来说的，距离操作者较近的一端为近端侧，距离操作者较远的一端，即更靠近手术位置的一端为远端侧，沿所述吻合器的轴心的方向为轴向，即从吻合器的远端侧到近端侧的方向，或从吻合器的近端侧到远端侧的方向。例如，在图1的视角中，对于吻合器来说，其远端侧为右边一侧，近端侧为左边一侧。图1中S1方向即为从吻合器的远端侧向近端侧的方向。定义S1方向或与S1方向相反的方向为吻合器的轴向。定义图1中的S2方向为纵向方向，即高度方向。定义图11中示出的R1方向为第一方向，在图11的视角中，第一方向为顺时针方向，定义与R1方向相反的方向为第二方向，在图11的视角中，第二方向为逆时针方向。
如图3～7所示，所述击发机构包括致动杆和所述把手组件。在该实施例中，所述致动杆为齿条6，所述齿条6朝向所述把手组件的一侧设置有多个驱动齿61。所述齿条6向远端侧方向运动时，该齿条6可以通过推刀杆驱动钉头部的吻合钉和切刀，进行吻合器的击发。所述把手组件包括第一把手部件1和第二把手部件2。所述第一把手部件1包括第一端11和第二端12，所述第一把手部件1的第二端12为供操作者握持的一端。所述第一把手部件1的第一端11设置有第一把手槽13，所述第一把手槽13包括第一位置区域(图7中13a示出的位置区域)和第二位置区域(图7中13b示出的位置区域)。在该实施例中，所述第一把手槽13包括切换槽131和弧形的让位槽132，在所述第一把手部件1处于第一初始位置时，所述切换槽131沿轴向延伸。所述第一位置区域和所述第二位置区域分布于所述切换槽131，且所述第一位置区域位于所述第二位置区域的远端侧。所述第一把手部件1与所述壳体81之间设置有把手复位弹簧84，给所述第一把手部件1一个沿第二方向复位的偏置力。所述第一把手部件1未被握持时，所述第一把手部件1处于远离固定把手82的第一初始位置，所述第一把手部件1被握持时，所述第一把手部件1从第一初始位置沿第一方向R1(示出于图11)旋转至靠近所述固定把手82的位置，所述把手复位弹簧84发生弹性变形，松开所述第一把手部件1后，在所述把手复位弹簧84的弹性变形恢复力作用下，所述第一把手部件1沿第二方向旋转而返回至远离所述固定把手82的第一初始位置。所述把手复位弹簧84可选为一个拉簧，但本申请不限于此，其他实施例中， 诸如压簧、扭簧、弹性片等也可以采用。
如图5～10所示，所述第二把手部件2包括支撑部21。所述支撑部21与所述第一把手部件1通过把手销轴31可旋转地固定于所述吻合器的壳体81。所述第二把手部件2还包括第一偏置件，所述第一偏置件配置为给所述第二把手部件2施加使其沿第二方向旋转的偏置力。在该实施例中，所述第一偏置件为套设于所述把手销轴31上的支架扭簧32，所述支架扭簧32的一端底脚抵持于所述支撑部21，另一端底脚抵持于所述第一把手部件1。所述吻合器的壳体81设置有第一限位部811，所述支撑部21包括第一抵持部27。初始状态下，所述第一限位部811抵持于所述第一抵持部27，以阻挡初始状态下所述支撑部21沿所述第二方向的运动，将所述支撑部21限制在第五位置(图4中示出的支撑部21的位置)。在另一实施方式中，也可以在所述第一把手部件1上设置第一抵持部，并且初始状态下，第二把手部件2抵持于第一抵持部，第一抵持部抵持于壳体81的第一限位部811，以阻挡初始状态下所述第一把手部件1和第二把手部件2沿所述第二方向的运动。在再一实施方式中，也可以分别在第一把手部件1和第二把手部件2上设置第一抵持部，阻挡初始状态下所述第一把手部件1和第二把手部件2沿所述第二方向的运动。
所述支撑部21的内部设置有第一安装槽212，一个滑动件23设置于所述第一安装槽212中，且可沿轴向运动。所述滑动件23的一侧设置有联动件24。所述支撑部21的一侧设置有沿轴向延伸的第二把手槽211。在该实施例中，所述联动件24为一个凸轴。所述联动件24同时进入所述第二把手槽211和所述第一把手槽13中，且所述联动件24可沿所述切换槽131在所述第一把手槽13的第一位置区域和第二位置区域之间运动。所述第一把手部件1处于所述第一初始位置时，所述第二把手槽211至少部分与所述切换槽131的第一位置区域重合，所述联动件24进入到所述第二把手槽211和所述切换槽131的重合部分，即位于第一位置区域。所述第一安装槽212中还设置有第二偏置件，所述第二偏置件配置为给所述滑动件23施加使其朝向近端侧方向运动的偏置力，即间接给所述联动件24一个朝向所述第二位置区域运动的偏置力。在该实施例中，所述第二偏置件为一个滑动件压簧25，设置于所述滑动件23的远端侧与所述第一安装槽212的内壁之间。但本申请不限于此，在其他实施方式中，所述第二偏置件也可以为一个拉簧、扭簧、弹片等。
如图5～10所示，所述第二把手部件2还包括击发件22，在该实施例中，所述击发件22为击发棘爪，所述击发件22通过击发件销轴261可旋转地连接于所述支撑部 21。所述击发件22可在远离所述齿条6的第一状态和靠近所述齿条6的第二状态之间切换。此处远离和靠近齿条6是相对来说的，即第二状态的击发件22相对于第一状态的击发件22更靠近齿条6。所述击发件22包括齿条驱动部222，在第二状态下的齿条驱动部222相比于第一状态下的齿条驱动部222更靠近齿条6。在该实施例中，所述第二把手部件2还包括第三偏置件，所述第三偏置件配置为给所述击发件22施加使其沿第二方向旋转的偏置力。在该实施例中，所述第三偏置件为套设于所述击发件销轴261上的击发件扭簧262，所述击发件扭簧262的一端底脚抵持于所述击发件26。所述吻合器的壳体81还设置有第二限位部812，所述击发件22还包括第二抵持部221。初始状态下，所述第二限位部812抵持于所述第二抵持部221，将所述击发件22保持在第一状态。如果所述支撑部21带动所述击发件22一起沿第一方向旋转，则所述第二限位部812会脱离第二抵持部221，在所述击发件扭簧262的偏置力作用下，所述击发件22会沿第二方向旋转而进入第二状态。
所述吻合器未做好击发准备时，所述联动件24位于所述第一位置区域，所述吻合器处于不可击发状态，当所述第一把手部件1沿第一方向旋转时，所述第一把手部件1相对于所述联动件24旋转，所述第二把手部件2不与所述第一把手部件1联动，因此所述第二把手部件2不发生旋转，此时所述击发件22处于所述第一状态，也就不会驱动所述齿条6，不会击发吻合器。在此过程中，所述第二把手槽211至少部分与所述让位槽132重合，所述联动件24进入所述让位槽132，以避免所述联动件24与所述第一把手部件1发生干涉。此时可以避免在吻合器未做好击发准备时的误击发，并且即使吻合器处于不可击发状态，在操作者握持第一把手部件1时，第一把手部件1仍然可以旋转，也就不会损伤把手组件的壳体81。
所述吻合器做好击发准备后，所述联动件24位于所述第二位置区域，此时所述吻合器进入可击发状态，当所述第一把手部件1沿所述第一方向旋转时，所述第一把手部件1通过所述联动件24驱动所述第二把手部件2的支撑部21和击发件22旋转，且所述击发件22进入所述第二状态并驱动所述齿条6向远端侧方向运动，从而可以正常击发吻合器。
如图8～11所示，所述击发机构还包括锁止件5和保险钮41，所述保险钮41位于所述锁止件5的远端侧，且所述保险钮41可以被操作而沿轴向运动。所述锁止件5位于所述第一把手部件1和所述支撑部21之间。所述吻合器的壳体81上设置有第二安装槽813(示出于图3)，所述保险钮41至少部分进入所述吻合器的壳体81内 部。所述保险钮41包括至少部分位于所述壳体81之外的操作部411和位于近端的第一配合部412。操作者按下所述操作部411时，驱动所述保险钮41向近端侧方向运动而进一步进入到所述壳体81的内部。所述锁止件5包括位于近端的锁止部53、位于远端的第二配合部54以及位于锁止部53和第二配合部54之间的旋转连接部51，所述锁止件5通过所述旋转连接部51可旋转地连接于所述支撑部21。所述第一配合部412和所述第二配合部54相对的两个侧面分别为倾斜方向相同的斜面，使得所述第一配合部412向近端侧方向运动时，通过两个斜面的配合将所述保险钮41的轴向运动转化为所述锁止件5的旋转运动。
具体地，所述锁止件5可被所述保险钮41驱动在第三位置和第四位置之间旋转而切换。图8示出的为所述锁止件5的第三位置，所述联动件24处于所述第一位置区域且所述锁止件5处于所述第三位置时，所述锁止部53位于所述联动件24的近端侧，且阻挡所述联动件24朝向所述第二位置区域的运动。图13示出的为所述锁止件5的第四位置。所述锁止件5可旋转地设置于所述把手组件。所述锁止件5处于所述第三位置且所述保险钮41沿D1方向朝向近端侧方向运动时，所述第一配合部412驱动所述第二配合部54，使得所述锁止件5沿第一方向旋转而进入所述第四位置，所述锁止部53不再阻挡所述联动件24向近端侧方向的运动，所述滑动件23在所述滑动件压簧25的作用下带动所述联动件24沿D2方向向近端侧方向运动至所述第二位置区域。如图7和图9所示，在该实施例中，所述锁止件5的旋转连接部51通过销轴或凸台可旋转地连接于所述支撑部21，所述第一把手部件1还开设有让位部111，对所述销轴或所述凸台进行让位，所述联动件24处于所述第一位置区域且所述第一把手部件1沿第一方向旋转时，所述销轴或凸台至少部分进入所述让位部111中。所述销轴或所述凸台设置于所述旋转连接部51或所述支撑部21。
在该实施例中，所述锁止件5还设置有扭簧抵持部52，所述扭簧抵持部52位于所述旋转连接部51和所述锁止部53之间。所述击发件扭簧262的一端底脚抵持于所述击发件22，另一端底脚抵持于所述锁止件5的扭簧抵持部52，所述击发件扭簧262配置为给所述锁止件5施加沿第二方向旋转的偏置力。所述保险钮41的操作部411的近端侧还设置有保险钮压簧42，给所述保险钮41施加朝向远端侧方向的偏置力。在图13的状态下，松开所述保险钮41时，所述保险钮41会在所述保险钮压簧42的作用下返回到未施加外力按压保险钮41时的位置，所述第一配合部412不再作用于所述第二配合部54。所述锁止件5在所述击发件扭簧262的作用下会重新返回到图 8示出的第三位置。在该实施例中，所述锁止件5的复位和所述击发件22的复位都是通过所述第三偏置件，即所述击发件扭簧262来实现的。在另一实施例中，所述锁止件5的复位和所述击发件22的复位可以采用两个分离的偏置件来实现。例如，设置所述击发件扭簧262的一端底脚抵持于所述击发件22，另一端底脚抵持于所述支撑部21，该击发件扭簧262也可以替换为一个压簧、拉簧、弹片等。并且，另外设置一个锁止件扭簧，给所述锁止件5施加沿第二方向旋转的偏置力，该锁止件扭簧的一端底脚抵持于所述支撑部21，另一端底脚抵持于所述锁止件5，该锁止件扭簧也可以替换成一个压簧、拉簧、弹片等。
如图2、图4和图11所示，所述吻合器中还设置有闭合连杆组件7，所述闭合连杆组件7包括第一杆71、第二杆72、闭合拉杆74和闭合拉片75。所述第一杆71和所述第二杆72组成连杆结构。所述第一杆71的第一端通过第一销轴731可旋转地连接于壳体81的连杆固定部814，使得所述第一杆71相对于所述壳体81只有旋转运动，而没有轴向运动。所述第一杆71的第二端与所述第二杆72的第一端通过第二销轴732可旋转地连接，所述第二杆72的第二端通过第三销轴733与所述闭合拉杆74可旋转地连接，所述闭合拉杆74与所述闭合拉片75的近端固定连接，所述闭合拉片75穿设于所述连接杆83中，且所述闭合拉片75的远端沿轴向延伸至所述钉头部。所述第一把手部件1还包括闭合驱动件14。所述闭合连杆组件7包括如图2所示出的第一平衡状态和如图12示出的第二平衡状态，所述闭合连杆组件7处于第一平衡状态时，所述第二销轴732位于一个远离齿条6的位置，所述闭合连杆组件7在轴向上处于一个比较紧凑的状态，所述闭合连杆组件7进入第二平衡状态时，所述第二销轴732位于一个靠近齿条6的位置，所述闭合连杆组件7在轴向上处于一个比较伸展的状态。此第一平衡状态和第二平衡状态都是所述闭合连杆组件7的两个自平衡状态。两个平衡状态之间的切换可以由所述第一把手部件的闭合驱动件14来驱动实现。所述闭合连杆组件7从第一平衡状态进入第二平衡状态时，所述第二杆72的第二端向近端侧方向运动，驱动所述闭合拉杆74带动所述闭合拉片75向近端侧方向运动。
以下结合图1、图2和图12对钉头部9的闭合过程进行介绍。所述钉头部9包括相对设置的钉砧91和钉仓组件92，所述钉砧91具有相对于所述钉仓组件92打开的打开状态和相对于所述钉仓组件92闭合的闭合状态。所述钉砧91的近端侧设置有倾斜的第一配合槽911，所述钉仓组件92的近端侧设置有轴向延伸的第二配合槽921， 一个闭合销93同时穿设于所述第一配合槽911和所述第二配合槽921中。所述闭合拉片75的远端连接于所述闭合销93。初始状态下，所述闭合连杆组件7处于所述第一平衡状态，所述闭合销93位于所述第二配合槽921的远端侧，所述钉砧91处于所述打开状态，所述吻合器尚未做好击发准备。此时握持第一把手部件1，第一把手部件1沿第一方向旋转，闭合驱动件14驱动所述第一杆71沿第一方向旋转，所述第二杆72驱动所述闭合拉杆74向近端侧方向运动，所述闭合拉杆74驱动所述闭合拉片75向近端侧方向运动，所述闭合连杆组件7进入所述第二平衡状态。在此过程中，所述闭合拉片75拉动所述闭合销93从所述第二配合槽921的远端侧向近端侧方向运动，所述钉砧91进入所述闭合状态，此时所述钉砧91和所述钉仓组件92夹紧组织。所述钉砧91从所述打开状态进入所述闭合状态的过程，称为所述钉头部9的闭合过程，也就是吻合器的闭合过程。在所述吻合器击发的过程中，需要保持所述钉头部9闭合。在吻合器击发完成后，驱动所述闭合销93和所述闭合拉片75向远端侧方向运动时，可以通过所述闭合销93再次打开所述钉头部9。
下面结合图2～18具体介绍该实施例中的吻合器的工作过程。
如图2～10所示，在初始状态下，所述闭合连杆组件7处于所述第一平衡状态，所述第二销轴732位于一个远离所述齿条6的位置，所述钉头部处于打开状态，此时吻合器没有完成击发准备，处于不可击发状态。所述第一把手部件1处于远离所述固定把手82的第一初始位置。所述锁止件5处于所述第三位置，且所述锁止部53将所述联动件24锁止在所述切换槽131的第一位置区域，吻合器处于不可击发状态。在所述锁止部53的阻挡作用下，所述滑动件23压缩所述滑动件压簧25下发生弹性变形。所述支撑部21的第一抵持部27抵持于所述壳体81的第一限位部811，使得所述支撑部21处于图4示出的第二初始位置。所述击发件22的第二抵持部221抵持于所述壳体81的第二限位部812，使得所述击发件22保持在远离所述齿条6的第一状态，所述击发件22的齿条驱动部222不与所述齿条6的驱动齿61配合。所述击发件扭簧262发生扭转弹性变形。
如图2和图4所示，所述第一杆71朝向所述第二把手部件2的一侧还设置有第四配合部714。在初始状态下，所述第四配合部714抵持于所述滑动件23的第三配合部231，使得所述滑动件23不能向近端侧方向运动。此时即使按压所述保险钮41，所述锁止件5向第四位置旋转而释放所述联动件24，在所述第四配合部714的作用下，所述联动件24也不能进入所述第二位置区域，也就无法驱动吻合器进入到可击 发状态。因此，在所述锁止件5和所述第四配合部714的双重作用下，可以将所述联动件24稳定地保持在第一位置区域，从而进一步保证在钉头部未闭合时无法击发吻合器。
如图11所示，所述联动件24处于所述第一位置区域且所述第一把手部件1被握持而沿第一方向旋转时，驱动把手复位弹簧84发生弹性变形，所述联动件24进入与所述切换槽131相连通的让位槽132，并沿所述让位槽132运动，以避免所述支撑部21不旋转而导致联动件24与第一把手部件1发生干涉。此时所述第二把手部件2不与所述第一把手部件1联动。因此，所述支撑部21仍保持在第二初始位置没有发生旋转，所述击发件22也保持在初始状态下的位置，所述击发件22的状态也就不会发生变化，仍然在所述第二限位部812的作用下保持在第一状态，不会与齿条6的驱动齿61接触，也就不会击发吻合器。同时，在所述第一把手部件1沿第一方向旋转时，所述第一把手部件1的闭合驱动件14驱动所述第一杆71沿第一方向旋转，所述第二销轴732向靠近所述齿条6的方向运动，使得所述第二杆72的第二端向近端侧方向运动，通过所述第二杆72驱动所述闭合拉杆74和所述闭合拉片75向近端侧方向运动，逐渐闭合所述钉头部，直到所述吻合器进入到图12示出的状态。在图12示出的状态中，所述闭合连杆组件7进入到所述第二平衡状态，所述钉头部完成闭合。此时，松开所述第一把手部件1，所述第一把手部件1会在所述把手复位弹簧84的作用下返回到其初始位置，由于所述闭合连杆组件7处于一个自平衡的第二平衡状态，即使失去了第一把手部件1的驱动作用，也不会返回到第一平衡状态，可以保持钉头部闭合的稳定性。在钉头部闭合完成后，也就完成了吻合器的击发准备工作。
如图12所示，在钉头部完成闭合后，所述闭合连杆组件7处于所述第二平衡状态，所述第一杆71的第四配合部714不再抵持于所述滑动件23的第三配合部231。如图13所示，此时，按压所述保险钮41，使得所述保险钮41向近端侧方向运动，所述保险钮压簧42被压缩而发生弹性变形，所述第一配合部412驱动所述第二配合部54，使得所述锁止件5沿第一方向旋转而进入到第四位置，释放所述联动件24。所述联动件24失去了所述锁止部53的阻挡作用后，在所述滑动件压簧25的弹性变形恢复力作用下会向近端侧方向运动而进入到第二位置区域。松开所述保险钮41，所述保险钮41在所述保险钮压簧42的偏置力作用下向远端侧运动而不再压迫所述锁止件5，所述锁止件5在所述击发件扭簧262的作用下沿第二方向旋转又返回到所述第三位置。此时，所述联动件24运动到所述锁止部53的近端侧，并停留在所述第二位置 区域。此时，所述吻合器进入到可击发状态。因此，在该实施例中，所述吻合器完成击发准备指的是所述吻合器的钉头部完成闭合。所述吻合器的可击发状态和不可击发状态的切换通过联动件24的位置切换实现。所述联动件24位于所述切换槽131的第一位置区域时，所述吻合器处于不可击发状态，所述联动件24处于所述切换槽131的第二位置区域时，所述吻合器进入所述可击发状态。
如图15和图16所示，在所述吻合器处于可击发状态，即所述联动件24进入到所述切换槽131的第二位置区域时，所述第一把手部件1与所述第二把手部件2通过所述联动件24联动。再次握持所述第一把手部件1，使得所述第一把手部件1从第一初始位置开始沿第一方向旋转时，所述联动件24无法再进入到让位槽132中，所述第一把手部件1通过所述联动件24驱动所述支撑部21沿第一方向旋转，所述支撑部21的第一抵持部27与所述第一限位部811分离。所述支撑部21从第二初始位置开始带动所述击发件22沿第一方向旋转，所述击发件22的第二抵持部221不再抵持于所述第二限位部812，在所述击发件扭簧262的复位作用下，所述击发件22相对于所述支撑部21沿第二方向旋转而进入所述第二状态，所述击发件22的齿条驱动部222与所述齿条6的驱动齿61啮合。继续握持所述第一把手部件1，所述第一把手部件1继续带动所述第二把手部件2沿第一方向旋转，所述击发件22驱动所述齿条6向远端侧方向运动而击发吻合器。在吻合器击发完成后，松开第一把手部件1，所述第一把手部件1在把手复位弹簧84的作用下沿第二方向旋转返回到其第一初始位置，所述第二把手部件2在所述支架扭簧32的作用下沿第二方向旋转返回到所述第一限位部811再次抵持于所述第一抵持部27，所述支撑部21返回到第二初始位置。因此，所述第一抵持部27实现了对所述支撑部21的第二初始位置的限定。
如图17所示，在吻合器击发完成后，需要再次打开钉头部。此时驱动所述闭合连杆组件7从所述第二平衡状态返回到所述第一平衡状态，此过程中所述第一杆71沿第二方向运动，所述第一杆71的第四配合部714驱动所述滑动件23的第三配合部231，使得所述滑动件23向远端侧方向运动。所述联动件24随所述滑动件23向远端侧方向运动，在此过程中，所述联动件24与所述锁止部53的近端面531相配合而将所述锁止部53向上抬起，所述锁止件5进入所述第四位置而不阻挡所述联动件24向远端侧方向的运动，所述联动件24运动到所述锁止部53的远端侧的第一位置区域之后，所述锁止件5失去了所述联动件24的作用而在所述击发件扭簧262的偏置力作用下沿第二方向旋转又返回到第三位置，再次将所述联动件24锁止在所述第一位置 区域，所述吻合器又进入到图18示出的不可击发状态，即所述第一把手部件1和所述第二把手部件2再次进入到不联动状态，所述第一把手部件1再次旋转也无法通过第二把手部件2击发吻合器，从而有效防止吻合器的意外二次击发。如图17所示，在该实施例中，所述锁止部53的近端面531为倾斜的引导面，以使得所述联动件24向远端侧方向运动顶起锁止部53时更为顺畅。所述锁止部53的远端面为垂直面，以使得所述锁止部53将所述联动件24锁止在第一位置区域时，所述联动件24与所述锁止部53的配合更加稳定。
以上内容是结合具体的优选实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (25)

  1. 一种击发机构，其特征在于，用于外科吻合器，所述击发机构包括致动杆和把手组件，所述把手组件包括：
    第一把手部件，设置有第一把手槽，所述第一把手槽包括第一位置区域和第二位置区域；
    第二把手部件，包括联动件和击发件，所述联动件至少部分位于所述第一把手槽中，所述击发件可在远离所述致动杆的第一状态和靠近所述致动杆的第二状态之间切换；
    其中，所述联动件位于所述第一位置区域且所述第一把手部件沿第一方向旋转时，所述第一把手部件相对于所述联动件旋转，所述第二把手部件不与所述第一把手部件联动，且所述击发件处于所述第一状态；
    所述联动件位于所述第二位置区域且所述第一把手部件沿所述第一方向旋转时，所述第一把手部件通过所述联动件驱动所述第二把手部件沿所述第一方向旋转，且所述击发件进入所述第二状态并驱动所述致动杆向远端侧方向运动。
  2. 根据权利要求1所述的击发机构，其特征在于，所述第一把手槽包括相连通的切换槽和让位槽，所述切换槽包括所述第一位置区域和位于所述第一位置区域近端侧的所述第二位置区域，所述联动件处于所述第一位置区域且所述第一把手部件沿所述第一方向旋转时，所述联动件进入所述让位槽。
  3. 根据权利要求2所述的击发机构，其特征在于，所述让位槽为与所述切换槽的第一位置区域相连通的弧形槽。
  4. 根据权利要求2所述的击发机构，其特征在于，所述第一把手部件处于第一初始位置时，所述切换槽沿轴向延伸。
  5. 根据权利要求4所述的击发机构，其特征在于，所述第二把手部件的一端还设有支撑部，所述击发件可旋转地连接于所述支撑部，所述支撑部设置有第二把手槽，所述第一把手部件处于所述第一初始位置时，所述第二把手槽至少部分与所述切换槽重合，且所述联动件至少部分位于所述第二把手槽中。
  6. 根据权利要求5所述的击发机构，其特征在于，所述联动件的近端还设有滑动件，所述滑动件至少部分位于所述支撑部的内部，所述联动件从所述第一位置区域进入所述第二位置区域时，所述滑动件沿轴向向近端侧方向运动。
  7. 根据权利要求5所述的击发机构，其特征在于，所述第二把手部件还包括第一偏置件，所述第一偏置件配置为给所述支撑部施加使其沿第二方向旋转的偏置力，所述第二方向与所述第一方向相反。
  8. 根据权利要求7所述的击发机构，其特征在于，所述吻合器的壳体设置有第一限位部，所述把手组件设有第一抵持部，所述第一限位部位于所述第一抵持部的近端侧，初始状态下，所述第一限位部抵持于所述第一抵持部，以阻挡所述把手组件沿所述第二方向的运动。
  9. 根据权利要求8所述的击发机构，其特征在于，所述第一抵持部设于所述第一把手部件和所述第二把手部件；
    或，所述第一抵持部设于所述第一把手部件，所述第二把手部件至少部分抵持于所述第一抵持部；
    或，所述第一抵持部设于所述第二把手部件。
  10. 根据权利要求7所述的击发机构，其特征在于，所述支撑部与所述第一把手部件通过同一把手销轴可旋转地固定于所述吻合器的壳体，所述第一偏置件为设置于所述把手销轴上的扭簧。
  11. 根据权利要求5所述的击发机构，其特征在于，所述吻合器的壳体设置有第二限位部，所述击发件包括第二抵持部，所述击发件处于所述第一状态时，所述第二限位部抵持于所述第二抵持部，以阻挡所述击发件进入所述第二状态；所述联动件位于所述第二位置区域，且所述第二把手部件沿所述第一方向旋转时，所述击发件与所述第二限位部分离而进入所述第二状态。
  12. 根据权利要求5所述的击发机构，其特征在于，所述第二把手部件还包括锁止件，所述锁止件枢轴设置于所述支撑部，所述锁止件包括锁止部，所述锁止件可被驱动在第三位置和第四位置之间切换，所述联动件处于所述第一位置区域且所述锁止件位于所述第三位置时，阻挡所述联动件朝向所述第二位置区域的运动。
  13. 根据权利要求12所述的击发机构，其特征在于，所述锁止件位于所述第一把手部件和所述支撑部之间。
  14. 根据权利要求12所述的击发机构，其特征在于，所述第二把手部件还包括第二偏置件，所述第二偏置件配置为给所述联动件施加使其朝向所述第二位置区域运动的偏置力，所述锁止件位于所述第四位置时，所述第二偏置件驱动所述联动件从所述第一位置区域运动至所述第二位置区域。
  15. 根据权利要求13所述的击发机构，其特征在于，所述锁止件处于所述第三位置且所述锁止件沿所述第一方向旋转时，所述锁止件进入所述第四位置。
  16. 根据权利要求15所述的击发机构，其特征在于，所述锁止件的远端侧还设置有一保险钮，所述保险钮沿轴向设置，所述保险钮被驱动向近端侧方向运动时，驱动所述锁止件从所述第三位置旋转进入所述第四位置。
  17. 根据权利要求16所述的击发机构，其特征在于，所述保险钮和所述锁止件的相对表面分别为倾斜方向相同的两个斜面，所述保险钮被驱动向近端侧方向运动时，通过所述斜面驱动所述锁止件从所述第三位置旋转至所述第四位置。
  18. 根据权利要求15所述的击发机构，其特征在于，所述第二把手部件还包括第三偏置件，所述锁止件在所述第四位置且受到的外力消除后，所述第三偏置件驱动所述锁止件沿第二方向旋转而进入所述第三位置。
  19. 根据权利要求18所述的击发机构，其特征在于，所述联动件被驱动从所述第二位置区域向所述第一位置区域运动时，所述联动件驱动所述锁止件从所述第三位置向所述第四位置旋转，使得所述联动件运动至所述锁止部的远端侧而返回所述第一位置区域。
  20. 根据权利要求18所述的击发机构，其特征在于，所述锁止部的近端面为引导面，和/或，所述锁止部的远端面为垂直面。
  21. 根据权利要求18所述的击发机构，其特征在于，所述击发件通过击发件销轴可旋转地连接于所述支撑部，所述第三偏置件为设置于所述击发件销轴的扭簧，所述扭簧的两端分别抵持于所述击发件和所述锁止件。
  22. 根据权利要求12所述的击发机构，其特征在于，所述锁止件通过销轴或凸台可旋转地连接于所述支撑部，所述第一把手部件还开设有让位部，所述联动件处于所述第一位置区域且所述第一把手部件沿所述第一方向旋转时，所述销轴或凸台至少部分进入所述让位部中。
  23. 根据权利要求6所述的击发机构，其特征在于，还包括闭合连杆组件，所述闭合连杆组件包括第一平衡状态和第二平衡状态，所述闭合连杆组件处于所述第一平衡状态且所述第一把手部件沿所述第一方向旋转时，驱动所述闭合连杆组件至少部分向近端侧方向运动而进入所述第二平衡状态；
    所述闭合连杆组件包括第四配合部，所述滑动件还包括第三配合部，所述闭合连杆组件处于所述第一平衡状态时，所述第四配合部抵持于所述第三配合部，以阻挡所 述滑动件向近端侧方向的运动。
  24. 根据权利要求23所述的击发机构，其特征在于，所述闭合连杆组件被驱动从所述第二平衡状态进入所述第一平衡状态时，所述第四配合部驱动所述第三配合部向远端侧方向运动，而使得所述联动件从所述第二位置区域返回至所述第一位置区域。
  25. 一种外科吻合器，其特征在于，包括权利要求1至24中任一项所述的击发机构。
PCT/CN2023/106890 2022-07-18 2023-07-12 击发机构及外科吻合器 WO2024017102A1 (zh)

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WO2013091512A1 (zh) * 2011-12-21 2013-06-27 常州市康迪医用吻合器有限公司 外科线形切割吻合器的击发机构
CN103767751A (zh) * 2014-01-03 2014-05-07 上海逸思医疗科技有限公司 一种可单手操作的外科器械
CN104224260A (zh) * 2014-09-19 2014-12-24 重庆康美唯外科器械有限公司 吻合器的防误击发保险机构及其吻合器
CN104997541A (zh) * 2015-08-14 2015-10-28 上海逸思医疗科技有限公司 一种可单手操作的外科器械及其操作方法
CN109953788A (zh) * 2017-12-26 2019-07-02 苏州天臣国际医疗科技有限公司 把手组件及包括其的吻合器
CN217960201U (zh) * 2022-07-18 2022-12-06 天臣国际医疗科技股份有限公司 击发机构及外科吻合器

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