CN117442280A

CN117442280A - Platform assembly and anastomat

Info

Publication number: CN117442280A
Application number: CN202210842149.9A
Authority: CN
Inventors: 丁水澄; 史晓杰
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2024-01-26

Abstract

The present disclosure relates to a platform assembly and a stapler having the same. The platform assembly includes: a trigger; a switch movable between a first position and a second position; a firing mechanism that is operated with the trigger when the switch is in the first position without causing firing of the tool assembly of the stapler; when the switching piece is positioned at the second position, the firing mechanism is operated along with the trigger to cause the tool assembly to fire; and a closure mechanism including a first moving member and causing the tool assembly to switch from open to closed as the first moving member moves from the third position to the fourth position, wherein the first moving member causes the switch member to move from the second position to the first position as the first moving member moves from the fourth position to the third position when the trigger is not operated and the switch member is in the second position. In this way, the structure of the stapler can be simplified and the operational convenience and safety of the stapler can be improved.

Description

Platform assembly and anastomat

Technical Field

The present disclosure relates to the field of medical devices, and more particularly, to a platform assembly suitable for a stapler and a stapler having the same.

Background

Anastomat is a device used clinically to replace traditional manual suturing. The stapler can increase the speed of tissue suturing and reduce trauma to the patient compared to conventional manual suturing. As is well known, there is a continuing need in the art for improved staplers that are simple in construction, convenient to operate, and safe.

Disclosure of Invention

In view of the above, the present disclosure provides a platform assembly adapted to a stapler and a stapler having the same, to simplify a structure of the stapler and to improve operational convenience and safety of the stapler.

In one aspect, the present disclosure provides a platform assembly for a stapler. The platform assembly includes: a trigger; a switch movable between a first position and a second position; a firing mechanism that is operated with the trigger when the switch is in the first position without causing firing of the tool assembly of the stapler; when the switching piece is positioned at the second position, the firing mechanism is operated along with the trigger to cause the tool assembly to fire; and a closure mechanism including a first moving member and causing the tool assembly to switch from open to closed as the first moving member moves from the third position to the fourth position, wherein the first moving member causes the switch member to move from the second position to the first position as the first moving member moves from the fourth position to the third position when the trigger is not operated and the switch member is in the second position.

In one possible implementation, the firing mechanism includes: an actuating member including an engagement portion; an engagement member that moves from a fifth position to a sixth position as the trigger is operated; a first urging member that urges the engaging member to engage with the engaging portion, wherein when the switching member is located at the first position, the switching member supports the engaging member so that the engaging member is separated from the engaging portion against the first urging force as the engaging member moves from the fifth position to the sixth position; when the switching piece is positioned at the second position, the meshing piece is meshed with the meshing part under the first acting force along with the movement of the meshing piece from the fifth position to the sixth position, so that the actuating piece moves distally along the axial direction to cause the tool assembly to fire; when the switching piece is positioned at the second position and the engagement piece is positioned at the fifth position, the first moving piece moves from the fourth position to the third position along with the first moving piece, and the first moving piece causes the switching piece to move from the second position to the first position.

In one possible implementation, when the switching member is located at the second position and the engaging member is located at the fifth position, the first moving member pushes the switching member to move the switching member from the second position to the first position along with the movement of the first moving member from the fourth position to the third position.

In one possible implementation, the platform assembly further includes a second force application member that applies a second force to the switching member that causes the switching member to move from the second position to the first position, the switching member having an abutment surface, wherein when the switching member is in the second position, the engagement member abuts the abutment surface such that the switching member is held in the second position against the second force; when the switching piece is positioned at the second position and the meshing piece is positioned at the fifth position, the first moving piece moves from the fourth position to the third position along with the first moving piece, and the first moving piece causes the meshing piece to be separated from the abutting surface, so that the switching piece moves from the second position to the first position under the second acting force.

In one possible implementation, the first moving member has a cam surface that guides the engagement member away from the abutment surface against the engagement member as the first moving member moves from the fourth position to the third position when the switching member is in the second position and the engagement member is in the fifth position.

In one possible implementation, the platform assembly further comprises a guide rail guiding the switching member to move between the first position and the second position, the guide rail being provided with a stop portion, the switching member comprising a shoulder portion and the stop portion being arranged in sequence along a direction of movement of the switching member from the first position to the second position, the second urging member being a compression spring, one end of the compression spring being pressed against the shoulder portion and the other end being pressed against the stop portion.

In one possible implementation, the switching member has a support surface, wherein the support surface supports the engagement member as the engagement member moves from the fifth position to the sixth position when the switching member is in the first position; when the switching piece is positioned at the second position, the meshing piece is separated from the supporting surface along with the movement of the meshing piece from the fifth position to the sixth position.

In one possible implementation, the support surface is a first step surface, the switching member further has a second step surface, the first step surface protrudes beyond the second step surface, wherein the first step surface supports the engagement member as the engagement member moves from the fifth position to the sixth position when the switching member is in the first position; when the switching member is located at the second position, the second step surface supports the engaging member or the second step surface does not support the engaging member as the engaging member moves from the fifth position to the sixth position.

In one possible implementation, the engagement member is pivotally supported about a first axis, and the first urging member applies a first urging force to the engagement member that causes it to rotate about the first axis in a first direction.

In one possible implementation, the engagement member is rotatably supported about a first axis, and the engagement member moves from the fifth position to the sixth position in a revolution about a second axis in a second direction opposite the first direction.

In one possible implementation, the engagement member is rotatably supported about a first axis by a trigger that is pivotally supported about a second axis.

In one possible implementation, the trigger is pivotally supported, the engagement member is supported by the trigger, and the trigger is provided with a guide rail guiding the movement of the switching member between the first position and the second position, the switching member being provided in the guide rail.

In one possible implementation, the first movement element moves between the third position and the fourth position in a manner of rotation about a third axis.

In one possible implementation, the first end of the first motion member is pivotally supported about a third axis, the closure drive mechanism further comprising: the first end of the second moving piece is pivoted with the second end of the first moving piece; a third moving member having a first end pivotally coupled to the second end of the second moving member and a second end pivotally supported about a fourth axis; and a linkage member at least partially proximal to and against the third motion member, wherein upon rotation of the first motion member about the third axis from the third position to the fourth position, the third motion member rotates about the fourth axis and causes the linkage member to move axially proximally, thereby causing the tool assembly to switch from open to closed.

In another aspect, the present disclosure also provides a stapler including the platform assembly provided by the present disclosure.

In another aspect, the present disclosure also provides a method of suturing tissue, the method comprising: providing the anastomat provided by the aspects of the disclosure; tissue suturing is performed using the stapler.

The implementation of the present disclosure can reduce the number of components of the stapler and simplify the structure of the stapler, since no additional mechanism is required to reset the switch from the second position to the first position.

In addition, the implementation of the present disclosure can improve the operational convenience of the stapler since no additional operation is required to reset the switching member.

In addition, in the implementation manner of the present disclosure, as the tool assembly is switched from closed to open, the switching member can be automatically reset from the second position to the first position, so that forgetting to reset the switching member after the tool assembly is opened can be avoided. It can be seen that this implementation can reduce the likelihood of accidental firing of the tool assembly, particularly if the tool assembly is open. Thus, this implementation can improve the safety of the stapler.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below.

It is appreciated that the following drawings depict only some, but not all, embodiments of the disclosure and are therefore not to be considered limiting of its scope.

It should also be understood that the same or corresponding reference numerals are used throughout the drawings to indicate the same or corresponding elements (components or portions).

It should also be understood that the drawings are merely schematic and that the sizes and proportions of the elements (components or portions) in the drawings are not necessarily accurate.

Fig. 1 is a schematic structural view of a stapler according to embodiment 1 of the present disclosure.

Fig. 2A to 2E are structural schematic diagrams illustrating an internal configuration of a platform assembly according to embodiment 1 of the present disclosure, wherein the platform assembly is in different states in fig. 2A to 2E.

Fig. 3 is an exploded schematic view of a portion of a platform assembly according to embodiment 1 of the present disclosure.

Fig. 4 is a schematic structural view of a switching member according to embodiment 1 of the present disclosure.

Fig. 5 is a schematic structural view of a portion of a trigger according to embodiment 1 of the present disclosure.

Fig. 6A and 6B are schematic structural views showing the fitting relationship of the switching member and the engaging member according to embodiment 1 of the present disclosure.

Fig. 7 is a schematic structural view showing a fitting relationship of an engagement piece and a stopper according to embodiment 1 of the present disclosure.

Fig. 8A and 8B are schematic structural views of a tool assembly according to embodiment 1 of the present disclosure, wherein the tool assembly is in different states in fig. 8A and 8B.

Fig. 9A and 9B are structural schematic diagrams showing a process of causing the first mover to leave the fourth position according to embodiment 1 of the present disclosure.

Fig. 10 is a schematic view showing the structure of a first moving member and a second moving member according to embodiment 1 of the present disclosure.

Fig. 11A to 11C are structural schematic diagrams showing an internal configuration of a platform assembly according to embodiment 2 of the present disclosure, wherein the platform assembly is in different states in fig. 11A to 11C.

Fig. 12A to 12C are structural schematic diagrams showing a fitting relationship among the first moving member, the engaging member, and the switching member according to embodiment 2 of the present disclosure.

Fig. 13A to 13C are schematic structural views showing a process of causing the first mover to leave the fourth position according to embodiment 2 of the present disclosure.

Detailed Description

Surgical staplers have the ability to increase the speed of tissue suturing and reduce trauma to the patient compared to traditional manual suturing, and are therefore widely used in surgical procedures.

A surgical stapler includes a tool assembly and a platform assembly. The tool assembly includes a pair of jaws, one of which may include an anvil and the other of which may include a cartridge for receiving staples. The platform assembly may also be referred to as a handle assembly, which is the portion of the stapler that is manipulated by the surgeon (or surgical robot).

In operation, the platform assembly may be manipulated to cause the tool assembly to switch from open to closed (i.e., to cause a pair of jaws to be brought closer together) to clamp tissue and to cause the tool assembly to fire (i.e., to cause staples to be ejected from the staple cartridge) to staple tissue.

The tool assembly of some staplers also includes a cutter. When the tool assembly fires, the cutter extends out and the staples are ejected, thereby achieving simultaneous cutting and stapling of tissue.

Correspondingly, the platform assembly includes a closure mechanism and a firing mechanism. The closure mechanism is used to cause the tool assembly to switch between open and closed. The firing mechanism is used for causing the tool assembly to fire.

The platform assembly also includes one or more triggers. For a platform assembly having only one trigger, the closure mechanism and firing mechanism may share the same trigger. For a platform assembly having multiple triggers, the closure mechanism and firing mechanism may each correspond to one trigger.

In order to avoid accidental firing of the tool assembly due to mishandling, the platform assembly of some staplers also includes a switch. Depending on the position of the switch, the firing mechanism switches between a locked state and an unlocked state.

When the firing mechanism is in the lockout state, the firing mechanism does not cause firing of the tool assembly as the trigger is operated. When the firing mechanism is in the unlocked state, the firing mechanism causes the tool assembly to fire as the trigger is operated.

For convenience of description, hereinafter, a position of the switching member corresponding to the locked state of the firing mechanism will be referred to as a first position, and a position of the switching member corresponding to the unlocked state of the firing mechanism will be referred to as a second position.

In one exemplary procedure, the tool assembly may be initially caused to close to clamp tissue, then the toggle member may be moved from the first position to the second position to toggle the firing mechanism from the locked state to the unlocked state, and then the trigger may be operated to cause the tool assembly to fire to effect stapling (and severing) of tissue.

Upon completion of the above operation, the tool assembly needs to be switched from closed to open to loosen tissue and the switch needs to be reset from the second position to the first position to prevent accidental firing of the tool assembly. These two steps can be implemented by two mechanisms, respectively. The physician (or surgical robot) may cause the tool assembly to switch from closed to open by operating one mechanism and the switch from the second position to the first position by operating the other mechanism.

However, this implementation requires more components, which makes the construction of the stapler more complex, which increases the manufacturing costs of the stapler and reduces the reliability of the stapler.

In addition, this implementation requires two operations to switch the tool assembly from closed to open and to reset the switch from the second position to the first position, which is detrimental to the convenience of operation of the stapler.

In addition, if the switch is forgotten to be reset from the second position to the first position after releasing the tissue, there is a risk that the tool assembly may be accidentally fired during subsequent operations. If the tool assembly is accidentally fired, particularly if the tool assembly is open, a medical incident may be initiated.

In view of this, the present disclosure provides a platform assembly suitable for a stapler and a stapler having the same. In the platform assembly provided by the present disclosure, the resetting of the switching member from the second position to the first position is achieved by the movement of the moving member of the closing mechanism during the switching of the tool assembly from the closed to the open position.

In addition, in an implementation of the present disclosure, as the tool assembly switches from closed to open, the switch is automatically reset from the second position to the first position, thereby enabling avoidance of forgetting to reset the switch after the tool assembly opens. It can be seen that this implementation can reduce the likelihood of accidental firing of the tool assembly, particularly if the tool assembly is open. Thus, this implementation can improve the safety of the stapler.

Embodiments of the present disclosure are exemplarily described below with reference to the accompanying drawings. It should be understood that the implementations of the present disclosure may be varied and should not be construed as limited to the embodiments set forth herein, which are presented only to provide a more thorough and complete understanding of the present disclosure.

Example 1

Embodiment 1 of the present disclosure provides a stapler 10. Stapler 10 may be a laparoscopic stapler. In particular, stapler 10 may be a laparoscopic linear cutting stapler. It will be appreciated that in other embodiments, a stapler according to the present disclosure may be of other types as well.

Referring to fig. 1, stapler 10 includes a tool assembly 11 and a platform assembly 12. In one example, the platform assembly 12 may include an elongated body 13. For example, the elongated body 13 may be tubular. An elongate body 13 may extend distally from the main body portion of the platform assembly 12. The tool assembly 11 may be attached to the distal end of the elongate body 13.

It is noted that in this disclosure, the term "distal" may relate to an end of the stapler that is distal from the surgeon (or surgical robot). Correspondingly, the term "proximal" may relate to the end of the stapler that is close to the doctor (or surgical robot).

The tool assembly 11 includes a pair of jaws 111,112. The tool assembly 11 is switchable between open and closed. When the tool assembly 11 is closed, a pair of jaws 111,112 are capable of clamping tissue therebetween. When the tool assembly 11 is opened, the pair of jaws 111,112 are separated from each other to release tissue. In fig. 1, the tool assembly 11 is in an open state.

Jaw 111 may comprise an anvil and jaw 112 may comprise a cartridge for storing staples. The platform assembly 12 also includes a trigger 14. By operating the trigger 14, the tool assembly 11 can be caused to fire. When the tool assembly 11 is fired, staples are ejected from the cartridge to effect stapling of the tissue.

In particular, in certain embodiments, the tool assembly 11 may also include a cutter (not shown). When the tool assembly 11 is fired, the cutter extends and staples are ejected, thereby simultaneously effecting cutting and stapling of tissue.

Referring to fig. 2A-2E, the trigger 14 is movable between an initial position and a final position. When the trigger 14 is not operated, it is in the initial position. When the trigger 14 is operated, it moves from the initial position to the final position. In fig. 2A, 2C and 2D, the trigger 14 is in the initial position. In fig. 2B and 2E, the trigger 14 is in the end position.

It should be understood that in this disclosure, the terms "initial position" and "end position" do not necessarily mean the two extreme positions of travel of a certain component.

The platform assembly 12 also includes a firing mechanism and a switch 15. The firing mechanism is used to cause firing of the tool assembly 11. The switch 15 is movable between a first position and a second position to switch the firing mechanism between the locked and unlocked states. In fig. 2A to 2C, the switching member 15 is located at the first position. In fig. 2D and 2E, the switch 15 is in the second position.

When the switch 15 is in the first position, the firing mechanism is in the lockout condition. At this point, the firing mechanism does not cause firing of the tool assembly 11 with the trigger 14 operated. When the switch 15 is in the second position, the firing mechanism is in an unlocked state. At this point, the firing mechanism causes the tool assembly 11 to fire as the trigger 14 is operated.

Since the state of the firing mechanism can be changed by changing the position of the toggle member, the toggle member can be maintained in the first position when the tool assembly is not desired to be fired, preventing accidental firing of the tool assembly. It follows that this implementation can improve the safety of the stapler.

The platform assembly 12 also includes a closure mechanism. The closing mechanism is used to cause the tool assembly 11 to switch from open to closed. The closure mechanism includes a first moving member 16. With the closing mechanism causing the tool assembly 11 to switch from open to closed, the first moving member 16 moves from one position to another.

For convenience of description, hereinafter, the position of the first mover 16 when the tool assembly 11 is opened will be referred to as a third position, and the position of the first mover 16 when the tool assembly 11 is closed will be referred to as a fourth position. In fig. 2A, the first mover 16 is in the third position. In fig. 2B to 2E, the first mover 16 is in the fourth position.

That is, with the tool assembly 11 switched from open to closed, the first mover 16 moves from the third position to the fourth position. With the tool assembly 11 switched from closed to open, the first mover 16 moves from the fourth position to the third position.

As shown in fig. 2D and 2A, when the trigger 14 is not operated (i.e., when the trigger 14 is in the initial position), the first moving member 16 is able to push the switching member 15 in association with the movement of the first moving member 16 from the fourth position in fig. 2D to the third position in fig. 2A, thereby causing the switching member 15 to move from the second position in fig. 2D to the first position in fig. 2A.

In this manner, the first moving member is capable of causing the switch member to return from the second position to the first position upon switching of the tool assembly from the closed to the open state, thereby restoring the firing mechanism from the unlocked state to the locked state. The implementation can simplify the structure of the anastomat and improve the operation convenience and safety of the anastomat. Furthermore, in this embodiment, the first moving part resets the switching part by means of a direct push, which is relatively simple to implement.

It should be appreciated that while in the above manner the first moving member directly pushes the switch member to reset the switch member, in other embodiments the first moving member may cause movement of and reset of the switch member by one or more intermediate members.

There are a variety of implementations of the firing mechanism. The present disclosure is not particularly limited thereto. An exemplary implementation of the firing mechanism is described below.

Referring again to fig. 2A-2E, the firing mechanism includes an actuating member 17 and an engagement member 18, the actuating member 17 having an engagement portion 171 adapted to engage the engagement member 18. As an example, the engagement portion 171 of the actuating member 17 may be a rack and the engagement member 18 may be a pawl. The firing mechanism further includes a first force application member 19 that applies a first force to the engagement member 18 that causes the engagement member 18 to engage the engagement portion 171.

The actuator 17 is axially slidably configured and the actuator 17 is configured to move axially distally (i.e., to the right in fig. 2A-2E) to cause firing of the tool assembly 11. The axial direction may refer to the longitudinal direction of the stapler 10, or the axial direction may refer to the extending direction of the elongated body 13. In one example, the actuating member 17 is slidably sleeved over the elongated body 13 so as to be axially slidable.

The engagement member 18 moves from one position to another as the trigger 14 moves from the initial position to the final position under operation. For convenience of description, hereinafter, a position of the engagement member 18 when the trigger 14 is in the initial position will be referred to as a fifth position, and a position of the engagement member 18 when the trigger 14 is in the end position will be referred to as a sixth position. In fig. 2A, 2C and 2D, the engagement member 18 is in the fifth position. In fig. 2B and 2E, the engagement member 18 is in the sixth position.

That is, in the present disclosure, the fifth and sixth positions of the engagement member 18 are relative to the initial and final positions of the trigger 14, respectively. Alternatively, the fifth and sixth positions of the engagement member 18 are determined based on the initial and final positions of the trigger 14, respectively. For example, although in fig. 2B and 2E, the engagement member 18 is in a different state due to the position of the switching member 15, since the trigger 14 is in the end position in fig. 2B and 2E, it can be regarded that the engagement member 18 is in the sixth position in fig. 2B and 2E.

When the switching member 15 is located at the first position, as shown in fig. 2A and 2B, the switching member 15 supports the engaging member 18 so that the engaging member 18 is kept separate from the engaging portion 171 against the first force as the engaging member 18 moves from the fifth position in fig. 2A to the sixth position in fig. 2B. During this process, since engagement member 18 remains disengaged from engagement portion 171, actuation member 17 does not move axially distally and thus tool assembly 11 does not fire.

When the switching member 15 is located at the second position, as shown in fig. 2D and 2E, with the movement of the engaging member 18 from the fifth position in fig. 2D to the sixth position in fig. 2E, the switching member 15 no longer provides the engaging member 18 with support that causes the engaging member 18 to remain separated from the engaging portion 171, and the engaging member 18 engages with the engaging portion 171 under the first urging force. In the process, the engagement member 18 urges the actuator member 17 axially distally, thereby causing the firing of the tool assembly 11.

In this way, it is possible to switch the state of the firing mechanism by changing the position of the switch. Thus, when the firing of the tool assembly is not desired, the firing mechanism can be maintained in a locked state, thereby avoiding accidental firing of the tool assembly due to mishandling of the trigger.

In addition, this implementation provides a basis for implementing the closure mechanism and firing mechanism to share the same trigger. For example, in implementations where the closure mechanism and the firing mechanism share a single trigger, the firing mechanism may be switched to a lockout state when only the tool assembly is required to be closed and not when the tool assembly is required to be fired, such that the tool assembly is not caused to fire when the tool assembly is caused to be closed by operation of the trigger.

Referring back to fig. 2A-2E, as one possible implementation, the engagement member 18 is configured to be capable of rotating about the first axis a ₁ Pivotally supported, the first force application member 19 applies force to the engagement member 18 such that the engagement member 18 is about a first axis a ₁ A first force rotating in a first direction. In this embodiment, the first direction may be a counterclockwise direction as viewed from the view direction of fig. 2A to 2E.

When the switching member 15 is in the first position, as shown in fig. 2A and 2B, during the movement of the engagement member 18 from the fifth position to the sixth position, the switching member 15 supports the engagement member 18 such that the engagement member 18 does not rotate about the first axis a under the first force ₁ Rotates in the first direction to engage with the engagement portion 171.

When the switching member 15 is in the second position, as shown in fig. 2D and 2E, the switching member 15 no longer provides the engaging member 18 with a force that causes the engaging member 18 to remain engaged during the movement of the engaging member 18 from the fifth position to the sixth position The engaging member 18 is supported by the engaging portion 171 and is separated from the engaging portion about the first axis a by a first force ₁ Rotates in the first direction to engage with the engagement portion 171.

In this way, switching of the state of the firing mechanism can be achieved by changing the position of the switch.

It should be appreciated that while in this embodiment the engagement member is switchably disengaged and engaged with the engagement portion by way of rotation, in other embodiments this may be accomplished in other ways. For example, in some embodiments, the engagement member may be slidably supported and the first force application member may apply a force to the engagement member that causes it to slide toward the engagement member.

Referring back to fig. 2A-2E, as one possible implementation, the engagement member 18 is configured to be capable of rotating about the first axis a ₁ Is supported in a self-rotating manner and the engagement member 18 is arranged to rotate about the second axis a ₂ The revolution in the second direction is performed so that the fifth position moves to the sixth position. In this embodiment, the second direction may be a direction opposite to the first direction. The second direction may be a clockwise direction as viewed from the view direction of fig. 2A to 2E.

Thus, when the switching member 15 is in the second position, the engagement member 18 is engaged to rotate about the second axis a ₂ In the course of the revolution in the second direction from the fifth position to the sixth position, the engagement member 18 is capable of being moved about the first axis a by the first urging member 19 ₁ Rotates in a first direction into engagement with engagement portion 171, thereby urging actuator 17 to move axially distally.

Referring back to fig. 2A-2E, as one possible implementation, the engagement member 18 is about a first axis a ₁ Is supported on rotation by the trigger 14, the trigger 14 being about a second axis a ₂ Is pivotably supported. Thus, the accompanying trigger 14 is operable from an initial position about the second axis a ₂ Rotation in a second direction from the initial position to the final position allows engagement member 18 to rotate about second axis a ₂ And the fifth to the sixth positions in a revolution manner along the second direction.

Referring to FIG. 3, in one example, the trigger 14 may includeA pair of arm portions 141, each arm portion 141 may be provided with a through hole 142. The platform assembly 12 may also include a pin 20, the pin 20 being disposed through a through hole 142 of each arm 141. The engagement member 18 is located between the pair of arm portions 141 and is pivotally sleeved on the pin shaft 20, thereby realizing the engagement member 18 to be able to rotate around the first axis a ₁ Pivotally supported to the trigger 14. In this implementation, the first axis a ₁ May be defined by the pin 20, or the first axis a ₁ May be the axis of the pin 20.

It should be appreciated that in other embodiments, the engagement member may be supported in other ways. For example, in some embodiments, the platform assembly may include an intermediate member secured to the trigger, with the engagement member being pivotally supported by the intermediate member.

Referring back to FIG. 1, the platform assembly 12 may also include a housing 21 and the trigger 14 may be configured to rotate about the second axis a ₂ Pivotally supported to the housing 21. As an example, referring to fig. 3, the housing 21 may include a pair of detachably coupled shells 211,212, with an aperture 213 provided on an inner side of each of the shells 211,212 and a pair of bosses 143 provided on opposite sides of the trigger 14. The trigger 14 is at least partially disposed between a pair of housings 211,212 and a pair of bosses 143 are pivotally inserted in apertures 213 of the housings 211,212, respectively, to effect the trigger 14 to be able to rotate about the second axis a ₂ Pivotally supported to the housing 21. In this implementation, the second axis a ₂ May be defined by the boss 143, or, alternatively, the second axis a ₂ May be the axis of boss 143.

It should be appreciated that in other embodiments, the trigger may be supported in other ways. For example, in some embodiments, the platform assembly may include an intermediate member secured to the housing, with the trigger being pivotally supported by the intermediate member.

Referring to fig. 3, as an example, the first force application member 19 may be a tension spring 19. One end of a tension spring 19 is attached to the trigger 14 and the other end is attached to the engagement member 18 such that application of the engagement member 18 causes the engagement member 18 to rotate about the first axis a ₁ A first force rotating in a first direction.

It should be appreciated that there are a variety of implementations of the first force application member, which are not specifically limited by the present disclosure. For example, in some embodiments, the first force application member may also be a torsion spring.

Referring back to fig. 1, the housing 21 may define a handle 214. When the trigger 14 is operated, the trigger 14 moves toward the handle 214 from the initial position to the final position. When the trigger 14 is released, the trigger 14 returns from the end position to the initial position away from the handle 214.

The platform assembly 12 may also include a force application member 22. The force application member 22 applies a force to the trigger 14 that returns the trigger 14 from the end position to the initial position. Thus, when the trigger 14 is released, the trigger 14 can return to the original position by the force application member 22.

As a possible implementation, referring to fig. 3, the force application member 22 is a tension spring, and a boss 215 is provided on the inner side of the housing 21. The force application member 22 is attached at one end to the boss 215 and at the other end to the trigger 14.

It will be appreciated that the implementation of the force application member 22 is not so limited. For example, in some embodiments, the force application member 22 may also be a torsion spring.

The manner in which the actuator causes firing of the tool assembly may be referred to in the art, and this disclosure is not particularly limited.

As an example, referring back to fig. 3, the firing mechanism further includes a first control 23. Illustratively, the first control member 23 may be an elongated push tab. The first control member 23 extends between the actuator 17 and the tool assembly 11. The proximal end of the first control member 23 engages the actuator 17 and the distal end engages the tool assembly 11 such that upon axially distal movement of the actuator 17, the first control member 23 moves axially distally causing firing of the tool assembly 11.

In one example, the proximal end of the first control member 23 may be provided with a bore 231 and the tubular elongate body 13 may be provided with a pair of slots 131 therethrough both internally and externally. The firing mechanism may also include a ring 24 and pin 25 provided with a pair of apertures 241. The first control member 23 is disposed through the elongated body 13, the ring 24 is disposed over the elongated body 13, and the pin is disposed through the hole 231, the pair of slots 131 and the pair of holes 241. With the actuator 17 moving axially distally, the actuator 17 pushes the ring 24, causing the first control member 23 to move axially distally.

In such an implementation, the pusher tab is capable of both axially and distally moving with the actuator and relatively rotating about the axis of the elongate body, which provides a basis for effecting rotation of the tool assembly about the axis of the elongate body.

It will be appreciated that there are a variety of ways in which the actuating member may be engaged with the push plate, and this is not limited to the above described implementation. For example, in some embodiments, the actuator may be directly connected to the pusher.

It should be noted that, the manner in which the actuating member causes the tool assembly to fire is not particularly limited, and reference may be made to the related art for its implementation.

In one example, the distal end of the first control member 23 may be engaged with the cutter of the tool assembly such that the first control member 23 is capable of moving axially distally to push the cutter distally. As the cutter moves distally, the cutter cuts tissue and pushes the firing block of the tool assembly 11 distally, which can push staples out of the staple cartridge during movement, thereby effecting stapling of the tissue.

In another example, as first control 23 moves axially distally, first control 23 may directly push the firing block such that the firing block moves distally to push staples out of the staple cartridge.

As an example, referring to fig. 4 and 5, the switch 15 has a support surface 151 and the trigger 14 is provided with a guide rail 144. The switch 15 is disposed in the guide rail 144 and is movable along the guide rail 144 between first and second opposed positions. With movement of the trigger 14 between the initial position and the final position, the switch 15 follows the movement of the trigger 14, thereby maintaining the mating relationship with the engagement member 18.

Fig. 6A shows the mating relationship of the switch member 15 and the engagement member 18 during movement of the engagement member 18 from the fifth position to the sixth position when the switch member 15 is in the first position. Fig. 6B shows the mating relationship of the switch member 15 and the engagement member 18 during movement of the engagement member 18 from the fifth position to the sixth position when the switch member 15 is in the second position.

As shown in fig. 6A, when the switching member 15 is located at the first position, the support surface 151 supports the engaging member 18 with the movement of the engaging member 18 from the fifth position to the sixth position, so that the engaging member 18 is kept separate from the engaging portion 171 against the first urging force from the first urging member 19.

When the switch member 15 is in the second position, as shown in fig. 6B, the engagement member 18 disengages the support surface 151 as the engagement member 18 moves from the fifth position to the sixth position, such that the engagement member 18 engages the engagement portion 171 under the first force, thereby pushing the actuator member 17 axially and distally, causing the firing of the tool assembly 11.

In this way, it is possible to achieve switchable engagement and disengagement of the engagement member with and from the engagement portion by changing the position of the switching member.

It should be appreciated that the implementation of the switch is various and not limited to the above-described implementation. For example, in some embodiments, the switching member may move entirely away from the engagement member as the switching member moves from the first position to the second position, thereby enabling the engagement member to engage with the engagement portion under the influence of the first urging member.

As an example, referring to fig. 4, 6A and 6B, the support surface 151 is implemented as a first step surface 151, and the switching member 15 further has a second step surface 152, the first step surface 151 protruding beyond the second step surface 152.

As shown in fig. 6A, when the switching member 15 is located at the first position, the first step surface 151 supports the engaging member 18 during the movement of the engaging member 18 from the fifth position to the sixth position, so that the engaging member 18 is kept separate from the engaging portion 171 against the first urging force.

As shown in fig. 6B, when the switching member 15 is located at the second position, during the movement of the engaging member 18 from the fifth position to the sixth position, the engaging member 18 is separated from the first step surface 151 and supported by the second step surface 152, so that the engaging member 18 is urged by the first urging member 19 about the first axis a ₁ Rotation in a first direction into engagement with engagement portion 171, thereby pushing actuator 17 axially distally, causing firing of tool assembly 11.

Since the first step surface protrudes beyond the second step surface, there is a height difference therebetween, which provides a space for the engagement member to rotate after being disengaged from the first step surface, so that the engagement member can rotate to engage with the engagement portion of the actuator by the first urging member when the engagement member is supported by the second step surface.

In addition, when the engaging member is supported by the second step surface, the second step surface provides a support that prevents the engaging member from continuing to rotate in the first direction to be separated from the engaging portion by the first urging member.

In addition, the actuator applies a reaction force to the engagement member that causes it to continue to rotate in the first direction during the movement of the engagement member by the engagement member. The second step surface can provide support for the engagement member to prevent the engagement member from continuing to rotate in the first direction under the reaction force, thereby preventing the engagement member from continuing to rotate in the first direction under the reaction force to disengage from the engagement portion.

It will be appreciated that in other embodiments, when the switch member is in the second position, the engagement member may not be supported by the second step surface but by other structures during movement of the engagement member from the fifth position to the sixth position. In such an implementation, the second step surface may be used only to provide a height differential that allows rotation of the engagement member.

It should be appreciated that in other embodiments, the switch may not have a second step surface. The space for rotation of the engagement member may be provided by a height difference between the support surface and the bottom surface of the rail. Accordingly, when the switching member is located at the second position, the engaging member may be supported by the bottom surface of the guide rail during movement of the engaging member from the fifth position to the sixth position, so as to avoid the engaging member from continuing to rotate in the first direction to be separated from the engaging portion under the first acting force and the reaction force from the actuating member during pushing of the actuating member.

There are various ways to move the switching member from the first position to the second position, which is not specifically limited in this disclosure.

As one possible implementation, referring to fig. 1-3, the platform assembly 12 may further include an operating member 26, and the operating member 26 may be configured to operatively move the switch member 15 from the first position to the second position.

In one example, the operating member 26 may be a button 26. The button 26 extends from the inside of the housing 21 to the outside of the housing 21. When the trigger 14 is not operated, i.e., the trigger 14 is in the initial position, the inner end of the button 16 faces one end of the switching member 15. At this time, by pressing the button 16, the button 16 can be driven to move toward the switching member 15, so that the switching member 15 moves in the proximal direction along the guide rail from the first position in fig. 2C to the second position in fig. 2D, that is, the first position is located in the distal direction of the second position when the trigger 14 is not operated, under the pushing of the inner end of the button 26.

In one example, the platform assembly 12 may further include a force application member 27, the force application member 27 applying a force to the button 26 that causes it to return. The force application member 27 may be, for example, a compression spring that is sleeved on the button 26. When the button 26 is pressed, the compression spring 28 yields under compression. When the button 26 is released, the elastic restoring force of the compression spring 28 restores the button 26.

Referring to fig. 4-6B, the platform assembly 12 further includes a second force application member 28. In this embodiment, the second urging member 28 urges the switching member 15 in the direction from the first position to the second position. The switching member 15 is provided with a first damping portion 153. The guide rail 144 is provided with a second damping portion 145.

When the switching member 15 is in the first position, the first damping portion 153 and the second damping portion 145 cooperate to provide a resistance force that holds the switching member 15 in the first position against the second force. When the switching member 15 moves in the direction from the first position to the second position by an external force (e.g., driven by the operating member 26) to disengage the first damping portion 153 and the second damping portion 145, the switching member 15 moves to the second position under a second force from the second force applying member 28.

In this implementation, the switching member is moved to a position such that the first damping portion and the second damping portion are disengaged by the driving of the operating member, and then continues to move to the second position by the driving of the second acting force. In this way, only a short stroke of the operating member is required to cause the switching member to move from the first position to the second position. This implementation is advantageous for downsizing the stapler, since the stroke of the operating member is relatively short.

In addition, if the operation member is directly pushed to the second position, the travel of the operation member under the operation of the doctor (or the surgical robot) is required to be exactly satisfied to push the switching member from the first position to the second position. This places high demands on the physician (or surgical robot) operation. In contrast, in the implementation manner of the present disclosure, the operating member only needs to drive the switching member to move to the position where the first damping portion and the second damping portion are disengaged, and does not need to move to a certain position accurately, which has lower requirements on accuracy of operation, so that the operation is more convenient.

In addition, in the above-described implementation of the present disclosure, the second urging member can appropriately prevent the switching member from accidentally returning from the second position to the first position after the switching member moves to the second position. Thus, this implementation can improve the reliability of the stapler.

As one implementation, referring back to fig. 4 and 6, the first and second damping parts 153 and 145 may be implemented as ribs. In particular, the switching member 15 may have a pair of opposite outer surfaces, each provided with one first damping portion 153. Correspondingly, the guide rail 144 may have a pair of inner surfaces respectively facing the pair of outer surfaces of the switching member 15, each of which is provided with one second damping portion 145.

When the switching member 15 is located at the first position, the first damping portion 153 is located at one side of the second damping portion 145 and abuts against the second damping portion 145, so that the first damping portion 153 and the second damping portion 145 provide resistance to hold the switching member 15 at the first position against the second force. After the switching member 15 moves toward the second position by an external force (e.g., driven by the operating member 26) to the other side of the first damping portion 153 to the second damping portion 145, the first damping portion and the second damping portion are separated, and then the switching member 15 continues to move to the second position by a second force from the second force applying member 28.

It should be appreciated that the implementation of the first damping portion and the second damping portion is various and not limited to the above-described implementation. For example, in some embodiments, one of the first damping portion and the second damping portion may be a protrusion, and the other may be a groove that mates with the protrusion. As another example, in some embodiments, the first and second damping portions may be bosses.

The second force application member may be implemented in a variety of ways, and this disclosure is not particularly limited.

As an example, referring back to fig. 4-6, the second force application member 28 may be a compression spring. The switch 15 further includes a shoulder 154 and the guide rail 144 further includes a stop 147. The second force application member 28 is sleeved on the switching member 15, and one end of the second force application member is pressed against the shoulder 154, and the other end of the second force application member is pressed against the blocking portion 147.

Referring to fig. 4 and 6, the guide rail 144 may further include a first stopper 146, and the second damping portion 145 and the first stopper 146 are sequentially arranged along the movement direction of the switching member 15 from the first position to the second position. When the switching member 15 is located at the second position, the first limiting portion 146 cooperates with the first damping portion 153 of the switching member 15 to prevent the switching member 15 from leaving the second position under the action of the second urging member 28. That is, the first stopper 146 stops the switching member 15 at the second position by cooperating with the first damping portion 153 of the switching member 15.

Referring again to fig. 4 and 6, in one specific example, the first stop 146 may be implemented as a rib. More specifically, a stopper 146 is provided on each of a pair of inner surfaces of the guide rail 144. When the switching member 15 is located at the second position, the first limiting portion 146 abuts against the first damping portion 153, so as to prevent the switching member 15 from leaving the second position under the action of the second force application member 28.

Referring back to fig. 4 to 6, the switching member 15 may further include a pair of branching portions 155. The pair of the branch portions 155 may extend in a movement direction of the switching member 15 from the first position to the second position, and the pair of the branch portions 155 are arranged at intervals in a direction perpendicular to the movement direction so as to form a space 156 therebetween. One end of the tension spring 19 (i.e., the first urging member 19) is attached to the engagement member 18, and the other end is attached to the trigger 14 through the space 156.

By this implementation, the switch can be prevented from being disengaged from the guide rail or turned over during the movement between the first position and the second position. Thus, this implementation can improve the reliability of the stapler.

Referring back to fig. 4 to 6, the switching member 15 may further include a second limiting portion 157, the second limiting portion 157 extending between the pair of branch portions 155. When the switching member 15 moves to the away second position in the moving direction from the first position to the second position, the second stopper 157 abuts against the tension spring 19.

In one aspect, the first urging member (i.e., the tension spring) can block the switching member to prevent the switching member from being separated from the guide rail after the switching member moves in the moving direction from the first position to the second position to be away from the second position. On the other hand, after the switching member causes the first force application member to elastically yield, the elastic restoring force of the first force application member can drive the switching member to return to the second position, so that the switching member is ensured to be in a proper position when the first moving member returns to the third position from the fourth position. It follows that this implementation can improve the reliability of the stapler.

It should be appreciated that while in the above described implementation, the engagement of the first force application member with the second stop portion serves to avoid the switch member from disengaging the guide rail, in other embodiments, the engagement of the first force application member with the second stop portion may also serve to stop the switch member in the second position. For example, in some embodiments, the guide rail may not be provided with a first limit portion, and the second limit portion may rest the switching member in the second position against the first urging member in the case where the switching member is in the second position.

Referring to fig. 7, the engagement member 18 includes a seat portion 181 and an abutment portion 182. The engagement member 18 is supported by the switching member 15 through the seat portion 181. The platform assembly 12 also includes a stop 29. When the engagement member 18 is in the fifth position and the switch member 15 is in the second position (i.e., when the platform assembly 12 is in the state of fig. 2D), the stopper 29 abuts against the abutment 182 of the engagement member 18 such that (the lowest part of) the seat portion 181 is flush with the support surface 151 or higher than the support surface 151 in a direction away from the switch member 15.

In fig. 7, the direction indicated by the thick arrow may be the height direction (i.e., the direction away from the switching member 15), and the dash-dot line H is used to indicate the height of the supporting surface 151. As can be seen from fig. 7, in this embodiment, when the engagement member 18 is in the fifth position and the switching member 15 is in the second position, the (lowest) seat 181 is higher than the support surface 151. It will be appreciated that in other embodiments, the seat 181 may also be (at its lowest) substantially flush with the support surface 151 when the engagement member 18 is in the fifth position and the switch member 15 is in the second position.

In this implementation, when the switching member is in the second position and the engagement member is in the fifth position, (the seat of) the engagement member does not block the movement of the switching member from the second position to the first position, which facilitates the resetting of the switching member under the action of the first movement member.

In addition, in this implementation, when the switching member is in the second position and the engaging member is in the fifth position, the stopper abuts against (the abutting portion of) the engaging member to separate the engaging portion, so that the engaging member does not block the movement of the actuating member in the axial proximal direction; when the engagement is in the second position, the (abutting portion of the) engagement member is away from the stopper member during movement of the engagement member from the fifth position to the sixth position, so that the engagement member is disengaged from the stopper member to engage with the engagement portion under the influence of the first urging member.

As an example, referring to fig. 2A to 3, the stopper 29 may be located inside the housing 21 and be a protrusion integrally formed with the housing 21. This approach is easy to implement.

It should be appreciated that the implementation of the stop is not limited to the above. For example, in some embodiments, the stop may also be a separate member mounted on the housing and fixed relative to the housing. As another example, in some embodiments, a member of other mechanisms of the platform assembly may serve both a role in the mechanism and as a stop.

There are a variety of implementations of the closure mechanism, which the present disclosure does not specifically limit. An exemplary description of the implementation of the closure mechanism follows.

Referring back to fig. 2A-2E, the first motion member 16 is about the third axis a ₃ Is pivotably supported. In particular, the first movement 16 may beAbout a third axis a ₃ Is pivotally supported by the housing 21. First mover 16 to rotate about third axis a ₃ The manner of rotation moves between a third position and a fourth position. In particular, the first movement 16 may be about a third axis a ₃ Moving in the second direction from the third position to the fourth position and about a third axis a ₃ Moving in the first direction from the fourth position to the third position.

As shown in fig. 2D and 2A, when the switch member 15 is in the second position and when the trigger 14 is not operated (i.e., the engagement member 18 is in the fifth position), the first movement member 16 pushes the switch member 15 on one side thereof, causing the switch member 15 to return from the second position to the first position, thereby switching the firing mechanism from the unlocked state to the locked state, as the first movement member 16 moves from the fourth position in fig. 2D to the third position in fig. 2A.

As an example, referring to fig. 2A, the first moving member 16 may be provided with an acting portion 161 which is located at one side thereof and is convex. The acting portion 161 abuts against the switching member 15 during the movement of the first moving member 16 from the fourth position to the third position.

It will be appreciated that although in the above described implementation the first moving member moves between the third and fourth positions by way of rotation, in other embodiments the first moving member may also move between the two positions by way of sliding.

As an example, referring again to fig. 3, the inner side of each of the housings 211,212 may also be provided with a hole 216 and the opposite sides of the first motion member 16 may be provided with a pair of bosses 162. A pair of bosses 162 are pivotally inserted in holes 216 of the housings 211,212, respectively, to effect the first movement 16 to be able to rotate about the third axis a ₃ Is pivotally supported by the housing 21. In this implementation, the third axis a ₃ May be defined by the boss 162, or the third axis a ₃ May be the axis of boss 162.

It will be appreciated that the manner in which the first motion member is supported is not limited to that described above. For example, in other embodiments, there may also be an intermediate member fixed relative to the housing, by which intermediate member the first mover may be pivotally supported about a third axis.

Referring back to fig. 2A-2E, the closure mechanism further includes a second moving member 30, a third moving member 31 and a linkage member 32. The first end of the first moving member 16 is about a third axis a ₃ Is pivotally supported by the housing 21 and has a second end pivotally connected to a first end of the second moving member 30. The second end of the second moving member 30 is pivotally connected to the first end of the third moving member 31, and the second end of the third moving member 31 is pivoted about the fourth axis a ₄ Is pivotally supported (by the housing 21).

The linkage 32 is axially slidably disposed. As an example, the linkage 32 is slidably sleeved on the elongated member 13 so as to be slidable in the axial direction. At least part of the linkage 32 is located proximal to the third mover 31 and abuts against the third mover 31. With the first movement 16 about a third axis a ₃ From the third position to the fourth position, the third movement 31 rotates about the fourth axis a ₄ And (5) rotating. In the process, the third mover 31 pushes the linkage 32 such that the linkage 32 moves axially proximally from the initial position shown in fig. 2A to the final position shown in fig. 2B to 2E, thereby causing the tool assembly 11 to switch from open to closed.

In such an implementation, the closure mechanism can translate rotation of the first motion member into sliding of the linkage member, thereby enabling the tool assembly to be switched from open to closed. In addition, in this implementation, the third motion member can act as a lever. Specifically, the first end of the third moving member may be regarded as a power point, the second end of the third moving member may be regarded as a fulcrum, and the position of the third moving member in contact with the linkage member may be regarded as a resistance point. Therefore, the implementation mode is relatively labor-saving, so that the use experience of the anastomat can be improved.

As an example, referring back to fig. 3, the inner side of each of the housings 211,212 may also be provided with a hole 217, and opposite sides of the second end of the third mover 31 may be provided with a pair of bosses 311. A pair of bosses 311 are respectively pivotably inserted in the holes 217 of the housings 211,212, so as to realize a second end of the third moving member 31 to be able to rotate about the fourth axis a ₄ Is pivotally supported by the housing 21. In this kind of practiceIn the present embodiment, the fourth axis a ₄ May be defined by the boss 311, or the fourth axis a ₄ Is the axis of the boss 311.

It will be appreciated that the manner in which the third mover is supported is not limited to that described above. For example, in other embodiments, there may also be an intermediate member fixed relative to the housing, and the third mover may be pivotally supported by the intermediate member about the fourth axis.

As an example, referring back to fig. 3, the first moving member 16 may further include a pair of arm portions 163 provided at a second end thereof, each arm portion 163 being provided with a through hole 164. The first end of the second moving member 30 is provided with a through hole 301. The platform assembly 12 may also include a pin 33. The first end of the second moving member 30 extends between a pair of arm portions 163 of the first moving member 16, and the pin 33 passes through the pair of through holes 164 and the through hole 301, thereby pivotally connecting the second end of the first moving member 16 with the first end of the second moving member 30.

It will be appreciated that there are a variety of ways to pivotally connect the first and second moving members and that the implementation is not limited to the above. For example, in other embodiments, the second end of the first moving member may be provided with a rotating shaft portion, and the first end of the second moving member may be provided with a hole adapted to the rotating shaft portion, and the rotating shaft portion may be inserted into the hole, thereby realizing a pivotable connection between the first moving member and the second moving member.

In one example, referring back to fig. 3, the third motion member 31 may further include a pair of arms 312 provided at a first end thereof, each arm 312 being provided with a through hole 313. The second end of the second moving member 30 is provided with a through hole 302. The platform assembly 12 may also include a pin 34. The second end of the second moving member 30 extends between a pair of arm portions 312 of the third moving member 31, and the pin 34 passes through a pair of through holes 313 and 302, thereby pivotally connecting the second end of the second moving member 30 to the first end of the third moving member 31.

It should be appreciated that there are a variety of ways to pivotally connect the second and third moving members and that the implementation is not limited thereto. For example, in some embodiments, the second end of the second moving member may be provided with a shaft portion and the first end of the third moving member may be provided with a hole adapted to the shaft portion, and the shaft portion may be inserted into the hole to pivotally connect the second moving member and the third moving member.

There are a variety of ways in which the linkage may cause the tool assembly to switch from open to closed, as this disclosure does not specifically limit. One possible implementation is given below.

Referring back to fig. 3, the closure mechanism may also include a second control member 35. As one example, the second control member 35 may be an elongated pull tab. A second control member 35 extends between the linkage 32 and the tool assembly 11. The proximal end of the second control member 35 engages the linkage member 32 and the distal end of the second control member 35 engages the tool assembly 11 such that with the axially proximal movement of the linkage member 32, the second control member 35 moves axially proximally, causing the tool assembly 11 to switch from open to closed.

There are various ways in which the linkage member cooperates with the second control member, which is not specifically limited in this disclosure.

As an example, referring back to fig. 3, the proximal end of the second control member 35 may be provided with a hole 351 and the tubular elongate body 13 may be provided with a pair of slots 132 through its interior and exterior. The closure mechanism may also include a ring 36 and pin 37 provided with a pair of apertures 361. The second control member 35 is disposed through the elongated body 13, the ring 36 is disposed over the elongated body 13, and the pin is disposed through the hole 351, the pair of slots 132, and the pair of holes 361. The link 32 is fitted over the ring 36, and the inner peripheral side of the link 32 is provided with a shoulder portion that is located distally of the ring 36 and abuts against the ring 36. As the linkage 32 moves axially proximally, the linkage 32 pushes the ring 24 such that the second control 35 moves axially proximally causing the tool assembly 11 to switch from open to closed.

In such an implementation, the second control member is axially distally movable following the linkage, and the second control member is rotatable about the axis of the elongate body, which provides a basis for effecting rotation of the tool assembly about the axis of the elongate body.

In one example, the platform assembly 12 may further include a cap 38 and a compression spring 39. Cap 38 is provided with a through hole 381, and pin 37 also passes through hole 381 of cap 38. A compression spring 39 is located proximal to cap 38. With the movement of the linkage 32 from the initial displacement to the end position, the second control member 35 moves proximally, and the compression spring 39 yields under compression. With the movement of the linkage 32 from the end position to the initial position, i.e. with the movement of the first movement member 16 from the fourth position to the third position, the second control member 35 moves distally under the elastic restoring force of the compression spring 39, thereby causing the tool assembly 11 to switch from closed to open.

It will be appreciated that the second control member may also be engaged with the linkage member in other ways. For example, in some embodiments, the proximal end of the second control member may be fixedly connected directly to the linkage member. Thus, with the linkage member moving from the initial position to the end position, the linkage member can drive the second control member to move proximally along the axial direction, so that the closing mechanism is switched from open to closed; with the movement of the linkage member from the end position to the initial position, the linkage member can drive the second control member to move distally along the axial direction, so that the closing mechanism is switched from closed to open

There are a variety of ways in which the second control member may be mated with the tool assembly, which is not specifically limited by the present disclosure.

As an example, referring to fig. 8A and 8B, clamp 111 and clamp 112 are pivotally connected by pin 113. The clamp 111 is provided with a guide groove 114, and the guide groove 114 gradually extends proximally to the side of the clamp 112. The tool assembly 11 further includes a pin 115, the pin 115 being attached to the distal end of the second control member 35.

Along with the axially proximal movement of the second control member 35, the pin 115 also moves axially proximally from the position in fig. 8A to the position in fig. 8B. In this process, pin 115 engages guide slot 114, driving clamp 111 about pin 113 from the position of fig. 8A to the position of fig. 8B, thereby causing tool assembly 11 to switch from open to closed.

With the second control member 35 moving axially distally, the pin 115 moves axially distally from the position in fig. 8B to the position in fig. 8A. In this process, pin 115 engages guide slot 114, driving clamp 111 about pin 113 from the position of fig. 8B to the position of fig. 8A, thereby causing tool assembly 11 to switch from closed to open.

There are various ways to cause the first moving member to move from the third position to the fourth position, which the present disclosure does not specifically limit. An exemplary implementation is given below.

Referring to fig. 2A and 2B, the first motion member 16 may be driven by the trigger 14. With the trigger 14 being operated, i.e., with the trigger 14 moving from the initial position in fig. 2A to the end position in fig. 2B, the first moving member 16 is moved from the third position in fig. 2A to the fourth position in fig. 2B by the actuation of the trigger 14.

It should be appreciated that although in this embodiment the trigger 14 is used to drive both the firing mechanism and the first motion member 16. However, in other embodiments, the platform assembly 12 may include two triggers, one for driving the firing mechanism and the other for driving the first motion member.

As one example, the closure mechanism may also include a drive 40 and the platform assembly 12 may also include a rail 218. Illustratively, the rail 218 may be formed on an inner wall of the housing 14. The first end of the driver 40 is pivotally connected to the trigger 14 and the second end is guided by the guide rail 218.

As shown in fig. 2A and 2B, with movement of the trigger 14 from the initial position to the final position, the second end of the drive member 40 abuts the first moving member 16 and urges the first moving member 16 such that the first moving member 16 moves from the third position to the fourth position.

As shown in fig. 2B and 2C, when the trigger 14 is released, the trigger 14 returns from the end position to the initial position by the force application member 22, the driving member 40 is separated from the first moving member 16 by the trigger 14, and the first moving member 16 is held in the fourth position.

In this way, the first moving member can be driven from the third to the fourth position by operating the trigger. In addition, in this implementation, after the trigger is released, the first motion member does not return to the third position as the trigger returns to the initial position, thus decoupling the trigger and the first motion member. This provides a basis for maintaining the tool assembly in a closed condition after the trigger is released, and also provides a basis for achieving that the closure mechanism and firing mechanism share the same trigger.

As one possible implementation, referring back to fig. 3, the platform assembly 12 may also include a pin 41. The first end of the driver 40 may be pivotally connected to the trigger 14 via a pin 41. The second end of the driving member 40 may be provided with a boss 401, and the boss 401 may be inserted into the guide rail 218.

Referring back to fig. 2A-2E, the closure mechanism further includes a third force application member 42, the third force application member 42 being configured to apply a force to the third moving member 31 that causes the third moving member 31 to rotate from the end position to the initial position.

As one example, the third force application member 42 may be a compression spring that is located proximal to the linkage member 32 and presses against the linkage member 32. In some embodiments, the third force application member 42 may be sleeved on the elongated body 13.

It will be appreciated that the third force application member may be implemented in a variety of ways, and is not limited to the above-described implementations. For example, in another example, the third force application member may also be implemented as a torsion spring.

When the first moving member 16 is in the fourth position, as shown in fig. 2B-2E, the first moving member 16 is in a position in which it is substantially co-linear with the second moving member 30, i.e., the first end to second end connection of the first moving member 16 is substantially co-linear with the first end to second end connection of the second moving member 30.

Alternatively, when the first moving member 16 is in the fourth position, the first moving member 16 is in a position that is reached through a position that is collinear with the second moving member 30. That is, as the first moving member 16 moves from the third position to the fourth position, the first moving member 16 passes through a position collinear with the second moving member 30.

In the above implementation, when the first moving member is in the fourth position, the first moving member is in a position substantially collinear with the second moving member (or the first moving member is in a position reached through a position collinear with the second moving member). At this time, the force exerted by the third force application member on the third moving member will not cause the first moving member to return from the fourth position to the third position. Thus, upon release of the trigger, the first movable member is maintained in the fourth position, i.e., the tool assembly is maintained in the closed position.

In addition, in such an implementation, when it is desired to switch the tool assembly from closed to open, it is only necessary to drive the first moving member out of the fourth position, i.e., to reverse (i.e., rotate in the first direction) the first moving member to a position no longer collinear with (or past a position collinear with) the second moving member, and then the first moving member can return to the third position under the influence of the third force application member, thereby causing the tool assembly to switch from closed to open and causing the switch member to move from the second position to the first position.

There are various ways to cause the first moving member to move away from the fourth position, which is not specifically limited by the present disclosure.

As an example, referring to fig. 9A and 9B, the platform assembly 12 may also include an operating member 43. The operating member 43 is arranged to operatively drive the first moving member 16 away from the fourth position, i.e. to drive the first moving member 16 from a position in fig. 9A in which it is co-linear with the second moving member 16 to a position in fig. 9B in which it is no longer co-linear with the second moving member 30. Illustratively, the operating member 43 may be implemented as a cam 42. When operated, the cam 42 rotates, pushing the first mover 16 such that the first mover 16 moves away from the fourth position.

There are various ways to stop the first moving member at the fourth position, which is not specifically limited by the present disclosure.

As an example, referring to fig. 9, the first end of the second moving member 30 may be provided with a rotation stopper 303. When the first moving member 16 rotates in the first direction to the fourth position, the rotation stopping portion 303 abuts against the first moving member 16, thereby limiting the first moving member 16 from continuing to rotate after reaching the fourth position. In this way, the first moving member 16 can be stopped at the fourth position.

It will be appreciated that in other embodiments, the first mover may be stopped in the fourth position in other ways. For example, in some embodiments, the first motion member may be provided with a rotation stop. As another example, in some embodiments, the first motion member may also be stopped by a member fixed relative to the housing, thereby stopping the first motion member in the fourth position.

The specific construction of stapler 10 is described above by way of example in connection with the accompanying drawings. Referring again to fig. 2A-2E, the operation of stapler 10 is illustrated.

Initially, platform assembly 12 may be in the state of fig. 2A. At this time, the trigger 14 is in the initial position, the switching member 15 is in the first position, the first moving member 16 is in the third position, and the engaging member 18 is in the fifth position. At this point, the tool assembly 11 is in the open state and the firing mechanism is in the lockout state.

As the trigger 14 is moved from the initial position to the final position under operation, the platform assembly 12 switches from the state in FIG. 2A to the state in FIG. 2B. In this process, the first mover 16 moves from the third position to the fourth position, such that the tool assembly 11 switches from open to closed. In addition, during this process, the engagement member 18 moves from the fifth position to the sixth position. Since the switch 15 is still in the first position, the firing mechanism is still in the lockout condition. Thus, during this process, engagement member 18 remains disengaged from engagement portion 171, thereby not causing firing of tool assembly 11.

Next, the trigger 14 is released. After trigger 14 is released, trigger 14 returns from the end position to the initial position under the influence of force application member 22, and stapler 10 switches from the state of FIG. 2B to the state of FIG. 2C. In this process, the engagement member 18 follows the trigger 14 from the sixth position back to the fifth position, leaving the first movement member 16 in the third position. As shown in fig. 2C, when stapler 10 is in the state of fig. 2C, first mover 23 remains in the fourth position and tool assembly 11 remains closed.

Then, the operation piece 26 is pressed. Under the pushing of the operation member 26, the switching member 15 moves along the guide rail from the first position to the second position, the firing mechanism is switched from the locked state to the unlocked state, and the stapler 10 is switched from the state in fig. 2C to the state in fig. 2D.

Subsequently, the trigger 14 is operated again. With the trigger 14 again moved from the initial position resulting in the end position, the engagement member 18 again moves from the fifth position to the sixth position, and the stapler 10 switches from the state of fig. 2D to the state of fig. 2E. In this process, since the switch member is in the second position, i.e., the firing mechanism is in the unlocked state, as the engagement member 18 moves from the fifth position to the sixth position, the engagement member 18 remains engaged with the engagement portion 171, pushing the engagement member 18 such that the engagement member 18 moves axially distally, thereby causing the firing of the tool assembly 11.

Then, after firing is completed, trigger 14 may be released and actuator 17 pulled back to switch stapler 10 from the state of fig. 2E to the state of fig. 2D. At this time, as shown in fig. 2D, the trigger 14 is at the initial position, the first moving member 16 is at the fourth position, the switching member 15 is at the second position, and the engaging member 18 is at the fifth position.

The first mover 16 or the second mover 30 may then be driven such that the first mover 16 is moved away from the fourth position. Or simultaneously with pulling back the actuating member 17, the first moving member 16 or the second moving member 30 is driven such that the first moving member 16 is moved away from the fourth position. When first moving member 16 moves away from the fourth position, first moving member 16 returns to the third position under the influence of third urging member 42, and stapler 10 switches from the state of fig. 2D to the state of fig. 2A. During this process, the tool assembly 11 returns from closed to open as the first motion member returns to the third position. At the same time, the first moving member 16 pushes the switching member 15, so that the switching member 15 returns from the second position to the first position, and the firing mechanism is restored from the unlocked state to the locked state.

Example 2

Embodiment 2 of the present disclosure provides a stapler that is similar in construction to the stapler provided in embodiment 1. Hereinafter, explanation will be mainly made about the differences of embodiment 2 from embodiment 1. Elements (members or portions) in embodiment 2 that are the same as or correspond to those in embodiment 1 are denoted by the same or corresponding reference numerals, and description thereof is omitted.

Referring to fig. 11A to 12C, in this embodiment, the second urging member 28a applies a second urging force to the switching member 15a that causes the switching member 15a to move from the second position to the first position.

As an example, the second urging member 28a may be a compression spring 28a fitted over the switching member 15 a. The guide rail 144a is provided with a stop 148a and the switch 15a disposed in the guide rail 144a is provided with a shoulder 158a. The shoulder 158a and the abutment 148a are arranged in this order in the direction of movement of the switch 15a from the first position to the second position (i.e., in the direction from right to left in fig. 12A to 12C). One end of the compression spring 28a is pressed against the abutment 148a and the other end is pressed against the shoulder 158a.

The switching piece 15a is provided with a stop surface 159a. The abutment surface 159a may meet the support surface 151a, and the abutment surface 159a and the support surface 151a may be sequentially arranged along the movement direction of the switching member 15a from the first position to the second position. In particular, in the implementation in which the switch 15a has the first step surface 151a and the second step surface 152a, the abutment surface 159a may be located between the first step surface 151a and the second step surface 152a and meet the first step surface 151a and the second step surface 152a, respectively.

Fig. 11A corresponds to fig. 12A. When the platform assembly is in the state shown in fig. 11A and 12A, the switching member 15a is located at the first position, the first moving member 16a is located at the fourth position, and the engaging member 18a is located at the fifth position. In this state, the engagement piece 18a is supported by the support surface 151a of the switching piece 15 a.

Fig. 11B corresponds to fig. 12B. As the switching member 15a moves from the first position to the second position, the engaging member 18a is disengaged from the supporting surface 151a, and thus the engaging member 18a moves to abut against the abutment surface 159a by the first urging member 19, and the platform assembly switches to the state of fig. 11B and 12B. In this state, the engagement piece 18a abuts against the abutment surface 159a, so that the switching piece 15a is held in the second position against the second urging force.

Fig. 11C corresponds to fig. 12C. As the first moving member 16a moves from the fourth position to the third position, the first moving member 16a causes the engagement member 18a to move apart from the abutment surface 159a, and thus the switching member 15a returns from the second position to the first position under the second force, the platform assembly switches to the state of fig. 11C and 12C.

In this way, when the switching member is located at the second position and the engaging member is located at the fifth position, the first moving member can cause the switching member to return from the second position to the first position along with the movement of the first moving member from the fourth position to the third position.

As an example, referring to fig. 12B and 12C, the first mover 16a may have a cam surface 165a. When the switching member 15a is in the second position and the engaging member 18a is in the fifth position, the cam surface 165a abuts against the switching member 15a to guide the switching member 15a to separate from the abutment surface 19a as the first moving member 16a moves from the fourth position to the third position.

As a more specific example, referring again to fig. 12B and 12C, the cam surface 165a is located at the first end of the first motion member 16a and extends along the second direction cam surface 165a to the third axis a ₃ Gradually increasing in distance. Thus, concomitantly around the third axis a ₃ Rotating in the first direction from the fourth position to the third position, the cam surface 165a abuts the engagement member 18a and is capable of guiding the engagement member 18a about the first axis a ₁ Rotated in the second direction to disengage from the abutment surface 159 a.

It will be appreciated that while in the above described implementations the first moving member is engaged with the engagement member by a cam surface, in other embodiments the first moving member may be engaged with the engagement member by other means. For example, in some embodiments, the first moving member and the engaging member may each be provided with teeth, through which the two may be engaged.

In addition to the above-described differences, in embodiment 2, the manner in which the first moving member is caused to return from the fourth position to the third position is also different from that in embodiment 1. An exemplary description is provided below.

Referring to fig. 13A-13C, the first mover 16a includes an extension 166a. When the first moving member 16a is in the fourth position, at least a portion of the extension 166a is in the path of the axially proximal movement of the actuating member 17.

When the first movement 16a is required to return from the fourth position to the third position, i.e. when the tool assembly is required to switch from closed to open, the actuator 17 may be pulled axially proximally. As shown in fig. 13A-13C, as the actuating member 17 moves axially proximally, the actuating member 17 abuts the extension 166a and pushes the extension 166a such that the first moving member 16a rotates to a position out of alignment with the second moving member 30 and thus the first moving member 16a continues to rotate to a third position under the influence of the third force application member 32.

In such an implementation, only pulling the actuating member axially proximally is required to cause the first moving member to return from the fourth position to the third position, thereby switching the tool assembly from closed to open. This implementation allows to reduce the number of components and thus to simplify the construction of the stapler.

Other embodiments of the present disclosure also provide a tissue suturing method. The method may be used to suture human or animal tissue. In particular, the method may be used to suture the digestive tract of a human or animal. The method comprises the following steps: providing the anastomat provided by the embodiment of the disclosure; the tissue is sutured using the stapler.

Above, certain embodiments of the present disclosure have been described exemplarily. It is to be understood that the implementation of the present disclosure is not limited to the above-described embodiments. For example, in other embodiments, the platform assembly may include a carrier separate from the trigger, the engagement member may be supported by the carrier, and the switch member may be disposed in a rail formed on the carrier. In this embodiment, the trigger may be in driving connection with the carrier such that the carrier is able to move with the trigger being operated, thereby bringing the engagement member from the fifth position to the sixth position.

It will be understood that, although the terms "first" or "second," etc. may be used in this disclosure to describe various elements (e.g., a first force applying member and a second force applying member), these elements are not limited by these terms, and these terms are merely used to distinguish one element from another element.

The specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the disclosure does not further describe various possible combinations.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art will recognize that changes and substitutions are within the technical scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A platform assembly adapted for use with a stapler, comprising:

a trigger;

a switch movable between a first position and a second position;

a firing mechanism that is operated with the trigger without causing firing of a tool assembly of the stapler when the switch is in the first position; when the switch is in the second position, the firing mechanism causes firing of the tool assembly with the trigger being operated; and

a closing mechanism comprising a first moving member and causing the tool assembly to switch from open to closed as the first moving member moves from a third position to a fourth position, wherein

When the trigger is not operated and the switching member is in the second position, the first moving member causes the switching member to move from the second position to the first position as the first moving member moves from the fourth position to the third position.

2. The deck assembly of claim 1, wherein the firing mechanism comprises:

an actuating member including an engagement portion;

an engagement member that moves from a fifth position to a sixth position as the trigger is operated;

a first force application member for applying a first force to the engagement member to cause the engagement member to engage the engagement portion, wherein

When the switching member is located at the first position, the switching member supports the engagement member so that the engagement member is separated from the engagement portion against the first urging force as the engagement member moves from the fifth position to the sixth position;

when the switch member is in the second position, with movement of the engagement member from the fifth position to the sixth position, the engagement member engages the engagement portion under the first force such that movement of the actuator member axially distally causes firing of the tool assembly;

when the switching member is located at the second position and the engagement member is located at the fifth position, the first moving member causes the switching member to move from the second position to the first position along with the first moving member moving from the fourth position to the third position.

3. The platform assembly according to claim 2, wherein when the switch member is in the second position and the engagement member is in the fifth position, the first movement member pushes the switch member to move the switch member from the second position to the first position as the first movement member moves from the fourth position to the third position.

4. The platform assembly of claim 2, further comprising a second force member that applies a second force to the switch member that causes the switch member to move from the second position to the first position, the switch member having an abutment surface, wherein

When the switching piece is positioned at the second position, the engagement piece is abutted against the abutting surface, so that the switching piece is kept at the second position against the second acting force;

when the switching piece is located at the second position and the meshing piece is located at the fifth position, the first moving piece moves from the fourth position to the third position along with the first moving piece, the first moving piece causes the meshing piece to be separated from the abutting surface, and the switching piece moves from the second position to the first position under the second acting force.

5. The platform assembly according to claim 4, wherein the first moving member has a cam surface that guides the engagement member away from the abutment surface against the engagement member as the first moving member moves from the fourth position to the third position when the switching member is in the second position and the engagement member is in the fifth position.

6. The platform assembly according to claim 4, further comprising a guide rail guiding the movement of the switching member between the first position and the second position, the guide rail being provided with a stopper portion, the switching member including a shoulder portion and the stopper portion being arranged in order along a movement direction of the switching member from the first position to the second position, the second urging member being a compression spring having one end pressed against the shoulder portion and the other end pressed against the stopper portion.

7. The platform assembly according to any one of claims 2 to 6, wherein the switch has a support surface, wherein

When the switching piece is positioned at the first position, the supporting surface supports the meshing piece along with the movement of the meshing piece from the fifth position to the sixth position;

When the switching piece is located at the second position, the meshing piece is separated from the supporting surface along with the movement of the meshing piece from the fifth position to the sixth position.

8. The platform assembly according to claim 7, wherein the support surface is a first step surface, the switch further having a second step surface, the first step surface protruding beyond the second step surface, wherein

When the switching member is located at the first position, the first step surface supports the engaging member as the engaging member moves from the fifth position to the sixth position;

when the switching member is located at the second position, the second step surface supports the engaging member or the second step surface does not support the engaging member as the engaging member moves from the fifth position to the sixth position.

9. The platform assembly according to any one of claims 2 to 6, wherein the engagement member is pivotally supported about a first axis, the first force application member applying the first force to the engagement member to rotate about the first axis in a first direction.

10. The platform assembly according to claim 9, wherein the engagement member is rotatably supported about the first axis, and the engagement member moves from the fifth position to the sixth position in a revolution about a second axis in a second direction opposite the first direction.

11. The platform assembly according to claim 10, wherein the engagement member is rotatably supported about the first axis by the trigger, the trigger being pivotally supported about the second axis.

12. The platform assembly according to any one of claims 2 to 5, wherein the trigger is pivotally supported, the engagement member is supported by the trigger, the trigger is provided with a guide rail guiding the movement of the switch member between the first and second positions, and the switch member is provided in the guide rail.

13. The platform assembly according to any one of claims 1 to 6, wherein the first mover moves between the third position and the fourth position in a manner that rotates about a third axis.

14. The platform assembly according to claim 13, wherein the first end of the first motion member is pivotally supported about the third axis, the closure drive mechanism further comprising:

the first end of the second moving piece is pivoted with the second end of the first moving piece;

a third moving member having a first end pivotally coupled to the second end of the second moving member and a second end pivotally supported about a fourth axis; and

A linkage member at least partially located proximal to and against the third motion member, wherein

With rotation of the first motion member about the third axis from the third position to the fourth position, the third motion member rotates about the fourth axis and causes the linkage member to move axially proximally, thereby causing the tool assembly to switch from open to closed.

15. A stapler comprising a platform assembly according to any one of claims 1 to 14.