WO2024017213A1

WO2024017213A1 - Platform assembly and stapler

Info

Publication number: WO2024017213A1
Application number: PCT/CN2023/107775
Authority: WO
Inventors: 史晓杰
Original assignee: 天臣国际医疗科技股份有限公司
Priority date: 2022-07-18
Filing date: 2023-07-17
Publication date: 2024-01-25

Abstract

A platform assembly and a stapler having the platform assembly. The platform assembly comprises: a trigger; a switching member (15), which has a stopping surface; a firing mechanism, which comprises an engaging member (16) and an actuating member (17) having an engagement portion, wherein when the switching member (15) is in a first position, same is manipulated along with the trigger, and the engaging member (16) and the engagement portion of the actuating member (17) remain separated; and when the switching member (15) is in a second position, same is manipulated along with the trigger, and the engaging member (16) engages with the engagement portion to push the actuating member (17), thereby causing a tool assembly to fire; and a closing mechanism, which comprises a first moving member (18), wherein same follows the first moving member (18) in moving from a third position to a fourth position, and the closing mechanism causes the tool assembly (11) to switch from open to closed; when the first moving member (18) is in the third position, same can, by means of abutting against the engaging member (16), restrict the engaging member (16) from moving and abutting against the stopping surface; and when the first moving member (18) is located in the fourth position, the engaging member (16) can keep the switching member (15) in the second position by abutting against the stopping surface. By the present means, the safety of the stapler can be improved.

Description

Platform components and staplers

Technical field

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

Background technique

The stapler is a device used clinically to replace traditional manual suturing. Compared with traditional manual suturing, staplers can increase the speed of tissue suturing and reduce trauma to patients. During the use of the stapler, there is a risk of misuse, which may lead to accidents. Therefore, there is a continuing need for staplers that reduce the risk of misuse.

Contents of the invention

In view of this, the present disclosure provides a platform assembly suitable for a stapler and a stapler having the platform assembly to improve the safety of the stapler.

In one aspect, the present disclosure provides a platform assembly suitable for use with a stapler. The platform assembly includes: a trigger; a switching member having a stop surface capable of moving between a first position and a second position; a firing mechanism including an engaging member and an actuating member having an engaging portion, wherein the engaging member is operated along with the trigger And movement; when the switching member is in the first position, as the trigger is operated, the meshing member and the meshing part remain separated; when the switching member is in the second position, as the trigger is operated, the meshing member engages the meshing part to push the actuating member, Thereby causing the tool assembly of the stapler to fire; and a closing mechanism including a first moving member, wherein as the first moving member moves from the third position to the fourth position, the closing mechanism causes the tool assembly to switch from open to closed; when the first moving member moves from the third position to the fourth position, the closing mechanism causes the tool assembly to switch from open to closed; When the moving part is in the third position, it can limit the movement of the meshing part to abut the stop surface by abutting against the meshing part; when the first moving part is in the fourth position, it does not limit the movement of the meshing part to abut the stop surface. abut against each other, so that the engaging member can maintain the switching member in the second position by abutting against the stop surface.

In a possible implementation, when the switching member is in the second position and the trigger is not operated, as the first moving member returns from the fourth position to the third position, the first moving member causes the engaging member to move to separate from the stop surface. .

In a possible implementation, the first moving part has a cam surface. When the switching part is in the second position and the trigger is not operated, as the first moving part moves from the fourth position to the third position, the cam surface engages The piece guides the engagement piece to separate from the stop surface.

In a possible implementation, when the switching member is in the second position and the trigger is not operated, the first moving member abuts against the engaging member to restrict the engaging member from engaging with the engaging portion.

In a possible implementation, the firing mechanism further includes a first force-applying member that applies a first force to the meshing member, wherein when the first moving member is in the third position, it moves against the meshing member. Limit bites The engaging part moves to abut against the stop surface under the first force; when the first moving part is in the fourth position, the engaging part can move to abut against the stop surface under the first force.

In a possible implementation, the platform assembly further includes a second force applying member, the second force applying member applies a second force to the switching member, wherein when the engaging member abuts the stop surface, the engaging member limits the switching member to Return to the first position from the second position under the second force.

In a possible implementation, the trigger is provided with a guide rail, the switching member is placed in the guide rail and can move between the first position and the second position along the guide rail, the switching member includes a first shoulder, and the guide rail includes a second shoulder, The first shoulder and the second shoulder are arranged sequentially along the movement direction of the switching member from the first position to the second position. The second force-applying member is a compression spring. One end of the compression spring is pressed against the first shoulder and the other end is pressed against the first shoulder. Lean on the second shoulder.

In a possible implementation, the firing mechanism further includes a first force-applying member that applies a first force to the engaging member, wherein when the switching member is in the first position and the trigger is operated, the switching member supports The meshing part enables the meshing part to overcome the first force and remain separated from the meshing part; when the switching part is in the second position and the trigger is operated, the meshing part engages with the meshing part under the first force.

In a possible implementation, the switching member also has a first step surface and a second step surface, the first step surface protrudes beyond the second step surface, and the stop surface is located between the first step surface and the second step surface, When the switching member is in the first position and the trigger is operated, the first step surface supports the meshing member; when the switching member is in the second position and the trigger is operated, the second step surface supports the meshing member.

In a possible implementation, the engaging member is pivotably supported by the trigger about the first axis, the first force is used to cause the engaging member to rotate about the first axis in the first direction, and the trigger is pivotable about the second axis. The ground is supported, wherein as the trigger is operated, the trigger rotates about the second axis in a second direction opposite to the first direction from an initial position to an end position.

In a possible implementation, the first moving part is pivotably supported around the third axis at its first end, and the closing mechanism further includes: a second moving part, the first end of which is connected to the second moving part of the first moving part. The third moving member has a first end that is pivotally connected to the second end of the second moving member and is pivotably supported at its second end about a fourth axis; and a linkage member that is at least partially located The proximal side of the third moving part and against the third moving part, wherein as the first moving part rotates around the third axis from the third position to the fourth position, the third moving part rotates around the fourth axis and causes the linkage part to move along the axis The proximal movement causes the tool assembly to switch from open to closed.

On the other hand, the present disclosure also provides a stapler, which includes the platform assembly provided by the present disclosure.

On the other hand, the present disclosure also provides a tissue suturing method, which method includes: providing the stapler provided in the above aspect of the disclosure; and using the stapler to perform tissue suturing.

Through the above implementation manner of the present disclosure, the risk of accidental firing of the tool assembly when opened due to misoperation can be reduced, thereby improving the safety of the stapler.

Brief description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the drawings required to be used in the embodiments will be briefly introduced below.

It should be understood that the following drawings illustrate only some, but not all, embodiments of the present disclosure and therefore should not be construed as limiting the scope.

It will also be understood that the same or corresponding reference numbers are used in the drawings to refer to the same or corresponding elements (components or parts).

It should also be understood that the drawings are schematic only and that the dimensions and proportions of elements (components or portions) in the drawings are not necessarily precise.

Figure 1 is a schematic structural diagram of a stapler according to an embodiment of the present disclosure.

2A to 2E are structural schematic diagrams showing the internal structure of the platform assembly of the stapler in FIG. 1 , where the platform assembly is in different states in FIGS. 2A to 2E .

3A to 3D are schematic structural diagrams showing the cooperative relationship between the first moving part, the engaging part and the switching part of the stapler in FIG. 1 .

FIG. 4 is a schematic structural diagram of the switching member of the stapler in FIG. 1 .

FIG. 5 is a schematic structural diagram of a part of the trigger of the stapler in FIG. 1 .

6A and 6B are schematic structural diagrams showing the mating relationship between the switching component and the engaging component of the stapler in FIG. 1 .

FIG. 7 is an exploded schematic view of a portion of the platform assembly of the stapler in FIG. 1 .

8A and 8B are schematic structural views of the tool assembly of the stapler in FIG. 1 , where the tool assembly is in different states in FIGS. 8A and 8B .

9A to 9C are structural schematic diagrams illustrating the process of causing the first moving part to leave the fourth position of the stapler in FIG. 1 .

FIG. 10 is a schematic structural diagram showing the first moving part and the second moving part of the stapler in FIG. 1 .

Detailed ways

Compared with traditional manual suturing, staplers can increase the speed of tissue suturing and reduce trauma to patients, so they are widely used in surgical procedures.

A stapler includes a tool component and a platform component. The tool assembly includes a pair of clamps, one of which can include a cutting board and the other of which can include a staple cartridge for receiving staples. The platform assembly may include a trigger and firing mechanism.

During surgery, the tool assembly can be switched from open to closed (ie, bringing a pair of clamps close to each other) to clamp the tissue between the pair of clamps. The trigger can then be operated such that the firing mechanism causes the tool assembly to fire. When the tool assembly is fired, staples are ejected from the staple cartridge, thereby closing the tissue. The tool assembly of some staplers also includes a cutter. When the tool assembly is fired, the cutter extends and staples are ejected from the staple cartridge, thereby simultaneously cutting and suturing tissue.

In order to avoid accidental firing of the tool assembly due to misoperation, the firing mechanism of some staplers can be switched between a locked state and an unlocked state. When the firing mechanism is in the locked state, the firing mechanism does not cause the tool assembly to fire as the trigger is operated. When the firing mechanism is in the unlocked state and the trigger is operated, the firing The mechanism causes the tool assembly to fire.

Typically, it is not expected that the tool assembly fires in the open position. Therefore, during surgery, you can first switch the tool assembly from open to closed, then switch the firing mechanism from the locked state to the unlocked state, and then operate the trigger to fire the tool assembly.

However, in actual use, misoperation may cause the firing mechanism to switch from the locked state to the unlocked state when the tool assembly is opened. If it is not discovered that the firing mechanism has been mistakenly switched to the unlocked state, subsequent operations may cause the tool assembly to be accidentally fired while being opened, which may lead to an accident.

In view of this, the present disclosure provides a platform assembly and a stapler having the platform assembly. Using the platform assembly provided by the present disclosure can reduce the risk of accidentally firing the tool assembly when it is opened due to misoperation.

The embodiments of the present disclosure are exemplarily described below with reference to the accompanying drawings. It should be understood that the present disclosure may be implemented in various ways and should not be construed as being limited to the embodiments set forth here. The embodiments set forth here are only for a more thorough and complete understanding of the present disclosure.

An embodiment of the present disclosure provides a stapler 10. The stapler 10 may be an endoscopic stapler. In particular, the stapler 10 may be an endoscopic linear cutting stapler. It is understood that in other embodiments, the stapler according to the present disclosure may also be of other types.

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

It should be noted that in this disclosure, the term “distal” may refer to an end of the stapler that is far away from the doctor (or surgical robot). Correspondingly, the term "proximal" may refer to the end of the stapler that is close to the surgeon (or surgical robot).

Tool assembly 11 includes a pair of clamps 111,112. The tool assembly 11 can be switched between open and closed. When the tool assembly 11 is closed, a pair of clamps 111, 112 can clamp tissue therebetween. When the tool assembly 11 is opened, a pair of jaws 111, 112 separate from each other to release tissue. In Figure 1, tool assembly 11 is in an open position.

The clamp 111 may include a cutting board, and the clamp 112 may include a staple cartridge for storing staples. Platform assembly 12 also includes trigger 14 . By operating the trigger 14, the tool assembly 11 can be caused to fire. When the tool assembly 11 is fired, the staples are ejected from the staple cartridge to achieve tissue suturing. In particular, in some embodiments, the tool assembly 11 may also include a cutter (not shown in the figure). When the tool assembly 11 is fired, the cutter extends and the staples are ejected, thereby simultaneously cutting and suturing the tissue.

When the trigger 14 is operated, the trigger 14 can move from one position to another. For convenience of description, in the following, the position when the trigger 14 is not operated is called the initial position, and the position to which the trigger 14 moves when it is operated is called the end position. In Figures 2A, 2C and 2D, the trigger 14 is in the initial position. In Figures 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 a certain Two extreme positions of the member's stroke.

Referring to FIGS. 2A to 2E , the platform assembly 12 also includes a firing mechanism and a switching member 15 . The switching member 15 can move between two opposite positions, thereby switching the firing mechanism between a locked state and an unlocked state.

For convenience of description, below, the position of the switching member 15 corresponding to the locked state of the firing mechanism is called the first position, and the position of the switching member 15 corresponding to the unlocked state of the firing mechanism is called the second position. In FIGS. 2A to 2C , the switching member 15 is in the first position. In Figures 2D and 2E, the switching member 15 is in the second position.

The firing mechanism includes an engaging part 16 and an actuating part 17. The actuating part 17 includes an engaging part 171, and the engaging part 171 is adapted to engage with the engaging part 16. The engaging member 16 moves as the trigger 14 is operated. As one example, the engaging member 16 may be supported by the trigger 14 so that the engaging member 16 can move as the trigger 14 is operated. The actuating member 17 is axially slidably configured, and the actuating member 17 can move axially toward the distal direction (ie, the right side in FIGS. 2A to 2E ) to cause the tool assembly 11 to fire.

It should be noted that the axial direction may refer to the length direction of the stapler, or the axial direction may refer to the extension direction of the elongated body. In one example, the actuating member is slidably sleeved on the elongated body, so as to be slidable in the axial direction.

As shown in Figures 2A and 2B, when the switching member 15 is in the first position, the firing mechanism is in a locked state. At this time, as the trigger 14 is operated, that is, as the trigger 14 moves from the initial position to the end position, the engaging member 16 always remains separated from the engaging portion 171 . During this process, since the engaging member 16 and the engaging portion 171 are always separated, the engaging member 16 will not push the actuating member 17 to move axially in the distal direction, so that the actuating member 17 will not cause the tool assembly 11 to Fire.

When the switching member 15 is in the second position, as shown in FIGS. 2D and 2E , as the trigger 14 is operated, that is, as the trigger 14 moves from the initial position to the end position, the engaging member 16 engages with the engaging portion 171 . During this process, since the engaging member 16 is engaged with the engaging portion 171 , the engaging member 16 will push the actuating member 17 to move axially in the distal direction, so that the actuating member 17 causes the tool assembly 11 to fire.

The platform assembly 12 also includes a closing mechanism including a first moving member 18 . As the first moving part 18 moves from one position to another, the closing mechanism causes the tool assembly 11 to switch from open to closed. That is to say, when the tool assembly 11 is opened, the first moving part 18 is located at one position; when the tool assembly 11 is closed, the first moving part 18 is located at another position.

For ease of description, in the following, the position of the first moving part 18 corresponding to the opening of the tool assembly 11 is called the third position, and the position of the first moving part 18 corresponding to the closing of the tool assembly 11 is called the fourth position. In Figure 2A, the first moving part 18 is in the third position. In Figures 2B to 2E, the first moving part 18 is in the fourth position.

In Figures 3A and 3B, the first moving part 18 is in the third position. In Figures 3C and 3D, the first moving part 18 is in the fourth position. In Figures 3A and 3C, the switching member 15 is in the first position. In Figures 3B and 3D, the switching member 15 is in the second position. In Figures 3A to 3D, the trigger 14 is at the initial starting position.

Referring to FIGS. 3A to 3D , the switching member 15 has a stop surface 151 . When the switching member 15 is in the second position, the engaging member 16 abuts against the stop surface 151 to prevent the switching member 15 from returning to the first position from the second position, thereby maintaining the switching member 15 in the second position. As an example, the engaging member 16 may include a seat portion 161 , and the engaging member 16 may abut against the stop surface 151 of the switching member 15 through the seat portion 161 .

As shown in FIGS. 3A and 3B , when the first moving member 18 is in the third position, the first moving member 18 abuts against the meshing member 16 to restrict the movement of the meshing member 16 to a position abutting against the stop surface 151 , thereby The movement of the switching member 15 from the second position back to the first position is not restricted. At this time, since there is no obstruction by the engaging member 16, after moving the switching member 15 from the first position in Fig. 3A to the second position in Fig. 3B, the switching member 15 will return to the second position from the second position in Fig. 3B. The first position in Figure 3A. As an example, the engaging member 16 may further include a protruding engaging portion 162 , and the engaging member 16 may abut against the first moving member through the engaging portion 162 .

As shown in FIGS. 3C and 3D , when the first moving member 18 is located at the fourth position, the first moving member 18 does not restrict the movement of the engaging member 16 to a position abutting against the stop surface 151 of the switching member 15 . At this time, after the switching member 15 is moved from the first position in FIG. 3C to the second position in FIG. 3D , the engaging member 16 moves to a position abutting against the stop surface 151 , so that the switching member 15 will be held in the second position. Two positions.

In this implementation, when the tool assembly is opened, the first moving part in the third position will restrict the movement of the engaging part to a position that abuts the stop surface of the switching part. At this time, if the switching part is moved from the first position Moved to the second position, since the engaging part does not block the switching part, the switching part will return to the first position. In this way, when the tool assembly is opened, the switching member will not be able to stop at the second position, so that the firing mechanism cannot be switched from the locked state to the unlocked state. Therefore, through this implementation, the risk of accidental firing of the tool assembly when opened due to misoperation can be reduced, thereby improving the safety of the stapler.

After completing the suturing (and cutting), the tool assembly needs to be switched from closed to open to release the tissue, and the switching member also needs to be reset from the second position to the first position to prevent the tool assembly from being accidentally fired. These two steps can be achieved through two institutions respectively. The doctor (or surgical robot) can cause the first moving member to move from the fourth position to the third position by operating one mechanism to switch the tool assembly from closed to open, and cause the switch by operating another mechanism. The piece returns from the second position to the first position.

However, this implementation requires more components, which makes the structure of the stapler more complex, thereby increasing the manufacturing cost of the stapler and reducing the reliability of the stapler. In addition, this implementation requires two steps to switch the tool assembly from closed to open and to reset the switching member from the second position to the first position, which is not conducive to the convenience of operating the stapler. In addition, if you forget to reset the switching member from the second position to the first position after releasing the tissue, there will be a risk of accidental firing of the tool assembly during subsequent operations. Accidents may occur if the tool assembly is accidentally fired, especially if the tool assembly is open.

In view of this, referring to Figures 3A and 3D, when the switching member is in the second position and the trigger 14 is not operated, as the first moving member 18 moves from the fourth position in Figure 3D to the third position in Figure 3A, the A moving part 18 can cause the engagement part 16 to separate from the stop surface 151 of the switching part 15, so that the switching part 15 moves away from the The second position in 3D moves to the first position in Figure 3A, and the firing mechanism switches from the unlocked state to the locked state.

Since no additional mechanism is required to reset the switching member from the second position to the first position, this implementation can reduce the number of components of the stapler and simplify the structure of the stapler. In addition, since no additional operation is required to reset the switch, the implementation of the present disclosure can improve the operating convenience of the stapler.

In addition, in the implementation of the present disclosure, as the tool assembly switches from closed to open, the switching member is automatically reset from the second position to the first position, thereby avoiding forgetting to reset the switching member after the tool assembly is opened. It can be seen that this implementation method can reduce the possibility of accidental firing of the tool assembly, especially when the tool assembly is opened. Therefore, this implementation can further improve the safety of the stapler.

In addition, in this implementation, only the first moving member can prevent the switching member from moving from the first position to the second position when the tool assembly is opened, and can also switch the tool assembly from closed to open. At the same time, the switching member is reset from the second position to the first position. It can be seen that in this way, the safety of the stapler can be improved while reducing the number of components of the stapler and simplifying the structure of the stapler.

After the firing is completed, the actuating member needs to be pulled back, that is, the actuating member needs to be pulled so that the actuating member moves axially toward the proximal direction. During the process of pulling the actuating member, if the engaging member meshes with the actuating member, it will be difficult or impossible to pull the actuating member back.

In view of this, referring to FIG. 3D , when the switching member 15 is in the second position and the trigger 14 is not operated, the first moving member 18 abuts the engaging member 16 to restrict the engaging member 16 from engaging with the engaging portion 171 . When the trigger 14 is operated, the engaging member 16 moves away from the first moving member 18, and the first moving member 18 no longer restricts the engaging member 16 from engaging with the engaging portion 171, so that the engaging member 16 can engage with the engaging portion 171 and push the actuating member 17 , thereby causing the tool assembly 11 to fire.

In this implementation, when the switching member is in the second position and the trigger is not operated, the engaging member will not engage with the engaging portion, thereby not preventing the actuating member from moving proximally in the axial direction. In addition, in this implementation, on the one hand, the first moving member can reduce the risk of accidental firing of the tool assembly when it is opened, and on the other hand, it can simultaneously switch the switching member from the third to the open state when the tool assembly is switched from closed to open. The two positions are reset to the first position, and on the other hand, it can prevent the engaging member from blocking the axial movement of the actuating member in the proximal direction when the switching member is in the second position and the trigger is not operated. Many of the above requirements can be met by only the first moving part. It can be seen that this implementation can reduce the number of components of the stapler and simplify the structure of the stapler.

Referring again to FIGS. 3A to 3D , the firing mechanism also includes a first force-applying member 19 , and the first force-applying member 19 applies a first force to the engaging member 16 . As shown in FIGS. 3A and 3B , when the first moving member 18 is in the third position, it abuts against the meshing member 16 and restricts the meshing member 16 from moving under the first force to abut against the stop surface 151 of the switching member 15 . Depend on. As shown in FIG. 3C and FIG. 3D , when the first moving member 18 is in the second position, it no longer restricts the movement of the engaging member 16 to abut against the stop surface 151 . At this time, if the switching member 15 is moved from the first position in Fig. 3C to the second position in Fig. 3D, the engaging member 16 will move to abut against the stop surface 151 under the action of the first force-applying member 19, thereby The switch 15 remains in the second position.

As an example, the engagement member 16 may be pivotally supported about the first axis a1 and the trigger 14 may to be pivotably supported about the second axis a2. The first force-applying member 19 may exert a first force on the meshing member 16 to cause the meshing member 16 to rotate in the first direction about the first axis a1. In this embodiment, the first direction may be a counterclockwise direction when viewed from the view direction of FIGS. 3A to 3D .

As a special example, the engaging member 16 can be pivotably supported by the trigger 14 around the first axis a1, and the first force-applying member 19 can be a tension spring 19, one end of which is connected to the trigger 14, and the other end of which is connected to the engaging member. 16, thereby exerting a first force on the meshing member that causes the meshing member 16 to rotate in the first direction around the first axis a1.

It should be understood that there are many ways to implement the first force-applying member, and this disclosure does not specifically limit this. For example, in some embodiments, the first force-applying member may also be a torsion spring.

Referring back to FIGS. 3A-3D , the tool assembly 12 also includes a second force applying member 20 . The second force applying member 20 exerts a second force on the switching member 15, and is used to cause the switching member 15 to return to the first position from the second position. In other words, the second force applying member 20 exerts a second force on the switching member 15 to cause the switching member 15 to return to the first position from the second position.

As shown in FIGS. 3A and 3B , when the first moving member 18 is in the third position, it abuts against the meshing member 16 to limit the movement of the meshing member 16 under the first force until it abuts against the stop surface 151 of the switching member 15 Depend on. At this time, after moving the switching member 15 from the first position in Fig. 3A to the second position in Fig. 3B, the switching member 15 will return from the second position in Fig. 3B to the second position in Fig. 3A under the second force. First position.

As shown in FIG. 3C and FIG. 3D , when the first moving member 18 is in the second position, it no longer restricts the movement of the engaging member 16 to abut against the stop surface 151 . At this time, after the switching member 15 is moved from the first position in FIG. 3C to the second position in FIG. 3D , the engaging member 16 will move to abut against the stop surface 151 under the action of the first force-applying member 19 , thereby The engaging member 16 will prevent the switching member 15 from returning to the first position from the second position under the second force, and thus the switching member 15 will be maintained in the second position.

As an example, referring to FIGS. 3A to 5 , the trigger 14 is provided with a guide rail 141 , and the switching member 15 is placed in the guide rail 141 and can move between the first position and the second position along the guide rail 141 . The switch 15 includes a first shoulder 152 . Rail 141 includes a second shoulder 142 . The first shoulder 152 and the second shoulder 142 are sequentially arranged along the movement direction of the switching member 15 from the first position to the second position. For example, from the perspective of FIGS. 3A to 3D , the movement direction of the switching member 15 from the first position to the second position is from right to left. In this case, the first shoulder 152 and the second shoulder 142 are arranged sequentially in the direction from right to left, that is, the first shoulder 152 is on the right side of the second shoulder 142 .

The second force-applying member 20 may be a compression spring 20 . One end of the compression spring 20 is pressed against the first shoulder 152 , and the other end is pressed against the second shoulder 142 , thereby exerting a second force on the switching member 15 . As the switching member 15 moves from the first position to the second position, the compression spring 20 yields under pressure. When the switching member 15 is in the second position and the engaging member 16 is separated from the stop surface 151, the elastic restoring force of the compression spring 20 drives the switching member 15 to return to the first position from the second position. In some embodiments, the guide rail 141 may further include a third shoulder 143 located on a side of the first shoulder 152 away from the second shoulder 142 . When the switching member 15 is in the first position, the first shoulder 152 abuts against the third shoulder 143 , thereby blocking the switching member 15 from detaching from the guide rail 141 under the second force.

Referring to FIGS. 3A to 4 , the switching member 15 may further include a pair of branch parts 155 . The pair of branch parts 155 may extend along the movement direction of the switching member 15 from the first position to the second position, and the pair of branch parts 155 may be spaced apart in a direction perpendicular to the movement direction, thereby forming a space therebetween. 156. One end of the tension spring 19 (ie, the first force-applying member 19 ) is attached to the engaging member 16 , and the other end is attached to the trigger 14 through the space 156 .

Through this implementation, it is possible to prevent the switching member from being detached from the guide rail or flipping over during movement between the first position and the second position. Therefore, this implementation can improve the reliability of the stapler

There are many ways to implement the switching element, and this disclosure does not specifically limit this. The implementation of the switching element will be exemplified below with reference to the accompanying drawings.

FIG. 6A shows the cooperative relationship between the switching member 15 and the engaging member 16 during the movement of the trigger 14 from the initial position to the end position when the switching member 15 is in the first position. FIG. 6B shows the cooperative relationship between the switching member 15 and the engaging member 16 during the movement of the trigger 14 from the initial position to the end position when the switching member 15 is in the second position.

As shown in FIG. 6A , when the switching member 15 is in the first position, during the movement of the trigger 14 from the initial position to the end position, the switching member 15 supports the engaging member 16 so that the engaging member 16 overcomes the first force and engages with the engaging member 16 . Part 171 remains separate. During this process, since the engaging member 16 remains separated from the engaging portion 171 , the engaging member 16 does not cause the actuating member 17 to move axially in the distal direction, and therefore the tool assembly 11 does not fire.

As shown in FIG. 6B , when the switching member 15 is in the second position, during the movement of the trigger 14 from the initial position to the end position, the switching member 15 no longer provides the engaging member 16 with the engaging member 16 so that the engaging member 16 remains separated from the engaging portion 171 With the support, the engaging member 16 engages with the engaging portion 171 under the first force. During this process, the engaging member 16 pushes the actuating member 17 to move axially in the distal direction, thereby causing the tool assembly 11 to fire.

In this way, it is possible to switch the state of the firing mechanism by changing the position of the switching member. In this way, when firing of the tool assembly is not expected, the firing mechanism can be kept in a locked state, thereby avoiding accidental firing of the tool assembly due to misoperation of the trigger.

As an example, referring to FIG. 5 , the switching member 15 also has a first step surface 153 and a second step surface 154 . The first step surface 153 protrudes beyond the second step surface 154 . The second step surface 154 and the first step surface 153 may be sequentially arranged along the direction of movement of the switching member 15 from the first position to the second position. In some embodiments, the stop surface 151 may be located between the first step surface 153 and the second step surface 154 . In particular, the stop surface 151 may be configured such that the end connected to the first step surface 153 is not higher than the first step surface 153, and the end connected to the second step surface 154 is not lower than the second step surface 154, so that This method can avoid jamming when the switching member 15 and the meshing member 16 move relative to each other. More specifically, the stop surface 151 may gradually protrude as it approaches the first step surface 153, thereby further preventing the occurrence of jamming. More specifically, the stop surface 151 may be a smooth surface, thereby further preventing the occurrence of sticking.

As shown in FIG. 6A , when the switching member 15 is in the first position, during the movement of the trigger 14 from the initial position to the end position, the first step surface 153 supports the engaging member 16 so that the engaging member 16 overcomes the first action. Use force to keep it separated from the engaging portion 171 .

As shown in FIG. 6B , when the switching member 15 is in the second position, during the movement of the trigger 14 from the initial position to the end position, the engaging member 16 breaks away from the first step surface 153 and is supported by the second step surface 154 , thereby engaging. Under the action of the first force-applying member 19, the member 16 rotates along the first direction around the first axis a1 to engage with the engaging portion 171, thereby pushing the actuating member 17 to move distally along the axial direction, causing the tool assembly 11 to fire.

Since the first step surface protrudes beyond the second step surface, there is a height difference between the two, which provides a space for the engagement member to rotate after being separated from the first step surface, so that when the engagement member is supported by the second step surface, The engaging member can rotate to engage with the engaging portion of the actuating member under the action of the first force-applying member.

In addition, when the meshing member is supported by the second step surface, the second step surface provides support to prevent the meshing member from continuing to rotate in the first direction to separate from the meshing part under the action of the first force-applying member.

In addition, when the engaging part pushes the actuating part, the actuating part exerts a reaction force on the engaging part causing it to continue to rotate in the first direction. The second step surface can provide support for the meshing part to prevent it from continuing to rotate in the first direction under the reaction force, thereby preventing the meshing part from continuing to rotate in the first direction to separate from the meshing part under the reaction force.

It should be understood that in other embodiments, when the switching member is in the second position, during the movement of the trigger from the initial position to the end position, the engaging member may not be supported by the second step surface, but may be supported by other structures. In this implementation, the second step surface may serve only to provide a height difference that allows the engagement member to rotate.

It should be understood that in other embodiments, the switching member may not have the second step surface, and the stop surface may be configured to be connected to the first step surface and not higher than the first step surface. In some implementations, the second step surface may also be part of the stop surface. In an implementation in which the switching element does not have a second stepped surface, the space for the engagement element to rotate can be provided by the height difference between the supporting surface and the bottom surface of the guide rail. Correspondingly, when the switching member is in the second position, during the movement of the trigger from the initial position to the end position, the engaging member can be separated from the supporting surface and supported by the bottom surface of the guide rail to prevent the engaging member from pushing the actuating member. , and under the first acting force and the reaction force from the actuator, continue to rotate in the first direction until it is separated from the meshing part.

There are many ways to move the switching member from the first position to the second position, and this disclosure does not specifically limit this.

As a possible implementation manner, referring again to FIG. 1 , the platform assembly 12 may further include an operating member 21 , and the operating member 21 may be used to operably move the switching member 15 from the first position to the second position.

In one example, referring again to FIGS. 2A to 2E , the operating member 21 may be a button 21 . When the trigger 14 is not operated, that is, when the trigger 14 is in the initial position, the inner end of the button 21 faces one end of the switching member 15 . At this time, by pressing the button 21, the button 21 can be driven to move toward the switching member 15, so that the switching member 15 is pushed by the inner end of the button 21 to move proximally along the guide rail from the first position in Figure 2C to Figure 2D In the second position, that is, when the trigger 14 is not operated, the first position is located in the distal direction of the second position.

In one example, the platform assembly 12 may further include a force applying member 22 that applies a force to the button 21 to cause it to reset. For example, the force applying member 22 may be a compression spring 22 sleeved on the button 21 . When the button 21 is pressed, the compression spring 22 yields under pressure. When the button 21 is released, the elastic restoring force of the compression spring 22 resets the button 21 .

There are many ways for the trigger to support the engaging member, and this disclosure does not specifically limit this.

As an example, referring to FIG. 7 , the trigger 14 may include a pair of arms 144 , and each arm 144 may be provided with a through hole 145 . The platform assembly 12 may also include a pin 23 that passes through the through hole 145 of each arm 144 . The engaging member 16 is located between a pair of arms 144 and is pivotably sleeved on the pin 23 , so that the engaging member 16 is supported on the trigger 14 in a manner that is pivotable about the first axis a1. In this implementation, the first axis a1 may be defined by the pin 23 , or the first axis a1 may be the axis of the pin 23 .

It should be understood that in other embodiments, the engaging 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 pivotally supported by the intermediate member.

There are many ways to support the trigger, which are not specifically limited in this disclosure.

Referring back to FIG. 1 , the platform assembly 12 may further include a housing 24 to which the trigger 14 may be pivotably supported about the second axis a2 . When the trigger 14 is operated, the trigger 14 can move about the second axis a2 in a second direction opposite to the first direction from the initial position to the end position.

In particular, the housing 24 may define a handle 241 . When the trigger 14 is operated, the trigger 14 moves toward the handle 241 from the initial position to the end position. When the trigger 14 is released, the trigger 14 moves away from the handle 241 and returns to the initial position from the end position.

In particular, the platform assembly 12 may also include a force applying member 25 . The force applying member 25 applies a force to the trigger 14 to return the trigger 14 to the initial position from the end position. In this way, when the trigger 14 is released, the trigger 14 can return to the initial position under the action of the force applying member 25 . As a possible implementation manner, see FIG. 3 , the force applying member 25 is a tension spring, and a boss 242 is provided on the inside of the housing 24 . One end of the force applying member 25 is attached to the boss 242, and the other end is attached to the trigger 14. It can be understood that the implementation of the force applying member 25 is not limited to this. For example, in some embodiments, the force applying member 25 may also be a torsion spring.

Referring back to FIG. 7 , the housing 24 may include a pair of removably connected shells 243 , 244 , each of which is provided with a hole 245 on its inner side and a pair of bosses 146 on opposite sides of the trigger 14 . The trigger 14 is at least partially placed between a pair of housings 243, 244, and a pair of bosses 146 are pivotably inserted into the holes 245 of the housings 243, 244 respectively, thereby enabling the trigger 14 to be supported in a manner that can pivot around the second axis a2. on the housing 24. In this implementation, the second axis a2 may be defined by the boss 146 , or in other words, the second axis a2 may be the axis of the boss 146 .

It should be understood 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 pivotally supported by the intermediate member.

The manner in which the actuating member causes the tool assembly to fire may refer to related technologies, and this disclosure does not specifically limit this.

As an example, referring back to FIG. 7 , the firing mechanism also includes a first control member 26 . For example, the first control member 26 may be an elongated push piece. The first control member 26 extends between the actuator member 17 and the tool assembly 11 . The proximal end of the first control member 26 cooperates with the actuating member 17, and the distal end cooperates with the tool assembly 11, so that as the actuating member 17 moves axially toward the distal direction, the first control member 26 moves axially toward the distal direction. Movement causes the tool assembly 11 to fire.

In one example, referring back to FIG. 7 , the proximal end of the first control member 26 may be provided with a hole 261 , and the tubular elongated body 13 may be provided with a pair of grooves 131 penetrating its interior and exterior. The firing mechanism may also include a ring 27 and a pin 28 provided with a pair of holes 271 . The first control member 26 is inserted into the elongated body 13 , the ring 27 is sleeved on the elongated body 13 , and the pin 28 is inserted into the hole 261 , a pair of grooves 131 and a pair of holes 271 . As the actuating member 17 moves distally in the axial direction, the actuating member 17 pushes the ring 27 so that the first control member 26 moves axially distally.

In this implementation, the push piece can follow the actuating member to move distally in the axial direction, and can also rotate relatively around the axis of the elongated body, which provides a basis for realizing the rotation of the tool assembly around the axis of the elongated body.

It can be understood that there are many ways of cooperating between the actuating member and the push piece, which are not limited to the above implementation methods. For example, in some embodiments, the actuator may be directly connected to the push blade.

It should be noted that this disclosure does not specifically limit the manner in which the actuator causes the tool assembly to fire, and reference may be made to related technologies for its implementation.

In one example, referring back to FIG. 7 , the distal end of the first control member 26 can cooperate with the cutter of the tool assembly such that the first control member 26 can move axially in the distal direction to push the cutter in the distal direction. sports. As the cutter moves in the distal direction, the cutter cuts the tissue and pushes the firing block of the tool assembly 11 to move distally. The firing block can push the staples out of the staple bin during the movement, thereby achieving tissue suturing.

In another example, as the first control member 26 moves axially distally, the first control member 26 may directly push the firing block so that the firing block moves distally to push the staples out of the staple cartridge.

There are many ways to implement the closing mechanism, and this disclosure does not specifically limit this. An exemplary implementation of the closing mechanism is described below.

Referring back to Figures 2A to 2E, the first moving member 18 is pivotably supported at its first end about the third axis a3. In particular, the first moving part 18 may be pivotably supported by the housing 24 at its first end about the third axis a3. The first moving part 18 moves between the third position and the fourth position in a rotational manner about the third axis a3. In particular, the first moving member 18 can move from the third position to the fourth position in the second direction about the third axis a3, and can move from the fourth position to the third position in the first direction about the third axis a3.

In one example, referring to FIGS. 3A to 3D , the first moving member 18 may have a cam surface 181 . When the switching member 15 is in the second position and the trigger 14 is not operated, as the first moving member 18 moves from the fourth position to the third position, the cam surface 181 abuts the meshing member 14 and pushes the meshing member 14 and the stop surface 151 separation.

As a more specific example, referring to Figures 3A to 3D, the cam surface 181 is located on the first moving member 18 , and the distance from at least part of the cam surface 181 to the third axis a3 gradually increases along the second direction. In this way, as the rotation about the third axis a3 along the first direction from the fourth position to the third position, the cam surface 181 abuts the meshing member 16 and can push the meshing member 16 to rotate about the first axis a1 along the second direction until it abuts against the stop. Face 151 separated.

It can be understood that although in the above implementation manner, the first moving part cooperates with the meshing part through the cam surface, in other embodiments, the first moving part can also cooperate with the meshing part in other ways. For example, in some embodiments, both the first moving part and the meshing part may be provided with teeth, and the two may cooperate through the teeth.

It can be understood that although in the above implementation manner, the first moving part moves between the third position and the fourth position by rotating, in other embodiments, the first moving part can also slide between the two positions. movement between positions.

As an example, referring back to FIG. 7 , the inner side of each of the shells 243 and 244 may also be provided with a hole 246 , and the opposite sides of the first moving part 18 may be provided with a pair of bosses 182 . A pair of bosses 182 are pivotably inserted into the holes 246 of the shells 243 and 244 respectively, so that the first moving part 18 is supported by the shell 24 in a manner that can pivot about the third axis a3. In this implementation, the third axis a3 may be defined by the boss 182 , or the third axis a3 may be the axis of the boss 182 .

It can be understood that the manner of supporting the first moving part is not limited to the above. For example, in other embodiments, there may also be an intermediate member fixed relative to the housing, and the first moving part may be pivotably supported by the intermediate member about a third axis.

Referring again to FIGS. 2A to 2E , the closing mechanism also includes a second moving part 29 , a third moving part 30 and a linkage part 31 . The first moving part 18 is pivotably supported (by the housing 24 ) at its first end about the third axis a3 , and the second end of the first moving part 18 is pivotally connected to the first end of the second moving part 29 . The second end of the second moving part 29 is pivotally connected to the first end of the third moving part 30, and the second end of the third moving part 30 is pivotably supported by (the housing 24) about the fourth axis a4.

The linkage 31 is slidably provided in the axial direction. As an example, the linkage member 31 is slidably sleeved on the elongated member 13 so as to be slidable in the axial direction. At least part of the linkage member 31 is located on the proximal side of the third moving member 30 and abuts against the third moving member 30 . As the first moving part 18 rotates around the third axis a3 from the third position to the fourth position, the third moving part 30 rotates around the fourth axis a4. During this process, the third moving part 30 pushes the linkage part 31, so that the linkage part 31 moves proximally along the axial direction from the initial position shown in Figure 2A to the end position shown in Figures 2B to 2E, thereby causing the tool assembly to 11 Switch from open to closed.

In this implementation, the closing mechanism can convert the rotation of the first moving part into the sliding of the linkage part, thereby causing the tool assembly to switch from opening to closing. In addition, in this implementation, the third moving part can function as a lever. Specifically, the first end of the third moving part can be regarded as the power point, the second end of the third moving part can be regarded as the fulcrum, and the position of the third moving part in contact with the linkage element can be regarded as the resistance point. It can be seen that this implementation method is relatively labor-saving, which can improve the use experience of the stapler.

As an example, referring back to FIG. 7 , the inner side of each of the shells 243 and 244 may also be provided with a hole 247 , and the opposite sides of the second end of the third moving part 30 may be provided with a pair of bosses 301 . a pair of bosses 301 are pivotably inserted into the holes 247 of the shells 243 and 244 respectively, so that the second end of the third moving part 30 is supported by the shell 24 in a manner that can pivot about the fourth axis a4. In this implementation, the fourth axis a4 may be defined by the boss 301 , or the fourth axis a4 is the axis of the boss 301 .

It can be understood that the method of supporting the third moving part is not limited to the above. For example, in other embodiments, there may also be an intermediate member that is fixed relative to the housing, and the third moving part may be pivotably supported by the intermediate member about the fourth axis.

As an example, referring again to FIG. 7 , the first moving member 18 may further include a pair of arm portions 183 provided at its second end, and each arm portion 183 is provided with a through hole 184 . The first end of the second moving part 29 is provided with a through hole 291 . Platform assembly 12 may also include pin 32 . The first end of the second moving part 29 extends between the pair of arms 183 of the first moving part 18 , and the pin 32 passes through a pair of through holes 184 and 291 , thereby connecting the second part of the first moving part 18 The end is pivotally connected to the first end of the second moving member 29 .

It can be understood that there are many ways to pivotally connect the first moving part and the second moving part, and are not limited to the above implementation manner. For example, in other embodiments, the second end of the first moving part may be provided with a rotating shaft part, the first end of the second moving part may be provided with a hole adapted to the rotating shaft part, and the rotating shaft part may be inserted into the hole, thereby achieving pivotal connection between the first moving part and the second moving part.

In one example, referring again to FIG. 7 , the third moving member 30 may further include a pair of arm portions 302 provided at its first end, and each arm portion 302 is provided with a through hole 303 . The second end of the second moving part 29 is provided with a through hole 292 . Platform assembly 12 may also include pin 33 . The second end of the second moving part 29 extends between a pair of arms 302 of the third moving part 30 , and the pin 33 passes through a pair of through holes 303 and 292 , thereby connecting the second end of the second moving part 29 The end is pivotally connected to the first end of the third moving member 30 .

It should be understood that there are many ways to pivotally connect the second moving part and the third moving part, and are not limited to the above implementation manner. For example, in some embodiments, the second end of the second moving part may be provided with a rotating shaft part, and the first end of the third moving part may be provided with a hole that matches the rotating shaft part, and the rotating shaft part may be inserted into In this hole, the second moving part and the third moving part can be pivotally connected.

There are many ways for the linkage to cause the tool assembly to switch from open to closed, which is not specifically limited in this disclosure. A possible implementation is given below.

Referring back to FIG. 7 , the closing mechanism may also include a second control member 35 . As an example, the second control member 35 may be an elongated pull tab. The second control member 35 extends between the linkage 31 and the tool assembly 11 . The proximal end of the second control member 35 cooperates with the linkage member 31 , and the distal end of the second control member 35 cooperates with the tool assembly 11 , so that as the linkage member 31 moves proximally along the axial direction, the second control member 35 moves toward the axial direction. The proximal movement causes the tool assembly 11 to switch from open to closed.

There are many ways for the linkage member to cooperate with the second control member, and this disclosure does not specifically limit this.

As an example, referring back to FIG. 7 , the proximal end of the second control member 35 may be provided with a hole 351 , and the tubular elongated body 13 may be provided with a pair of grooves 132 penetrating its interior and exterior. The closure mechanism may also include a ring 36 and a pin 37 provided with a pair of holes 361 . The second control member 35 is inserted into the elongated body 13 , the ring 36 is sleeved on the elongated body 13 , and the pin is inserted into the hole 351 , a pair of grooves 132 and a pair of holes 361 . The linkage piece 31 is set on The ring 36 is provided with a shoulder on the inner circumferential side of the linkage 31 , which is located on the distal side of the ring 36 and abuts against the ring 36 . When the linkage member 31 moves proximally along the axial direction, the linkage member 31 pushes the ring 36, so that the second control member 35 moves proximally along the axial direction, causing the tool assembly 11 to switch from open to closed.

In this implementation, the second control member can follow the linkage member to move axially distally, and the second control member can rotate about the axis of the elongated body, which provides a means for realizing the rotation of the tool assembly about the axis of the elongated body. foundation.

In one example, the platform assembly 12 may also include a cap 38 and a compression spring 39 . The cap 38 is provided with a through hole 381 , and the pin 37 also passes through the through hole 381 of the cap 38 . Compression spring 39 is located on the proximal side of cap 38 . As the linkage member 31 moves from the initial displacement to the end position, the second control member 35 moves proximally, and the compression spring 39 yields under pressure. As the linkage member 31 moves from the end position to the initial position, that is, as the first moving member 18 moves 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, causing The tool assembly 11 switches from closed to open.

It can be understood that the second control component can also cooperate with the linkage component in other ways. For example, in some embodiments, the proximal end of the second control member may be directly fixedly connected to the linkage member. In this way, as the linkage piece moves from the initial position to the end position, the linkage piece can drive the second control member to move proximally along the axial direction, thereby causing the closing mechanism to switch from open to closed; as the linkage piece moves from the end position to the initial position , the linkage member can drive the second control member to move distally along the axial direction, thereby causing the closing mechanism to switch from closing to opening.

There are many ways for the second control part to cooperate with the tool assembly, and this disclosure does not specifically limit this.

As an example, referring to FIGS. 8A and 8B , clamps 111 and 112 are pivotally connected by pins 113 . The clamp 111 is provided with a guide groove 114, which extends toward the proximal direction and gradually toward the side where the clamp 112 is located. The tool assembly 11 also includes a pin 115 attached to the distal end of the second control 35 .

As the second control member 35 moves axially proximally, the pin 115 also moves axially proximally from the position in Figure 8A to the position in Figure 8B. During this process, the pin 115 cooperates with the guide groove 114, and the clamp 111 is driven to rotate around the pin axis 113 from the position in FIG. 8A to the position in FIG. 8B, thereby causing the tool assembly 11 to switch from open to closed.

As the second control member 35 moves axially distally, the pin 115 moves axially distally from the position in Figure 8B to the position in Figure 8A. During this process, the pin 115 cooperates with the guide groove 114, and the clamp 111 is driven to rotate around the pin shaft 113 from the position in FIG. 8B to the position in FIG. 8A, thereby causing the tool assembly 11 to switch from closed to open.

There are many ways to cause the first moving part to move from the third position to the fourth position, and this disclosure does not specifically limit this. Below, an exemplary implementation is given.

Referring to FIGS. 2A and 2B , the first moving member 18 may be driven by the trigger 14 . As the trigger 14 is operated, that is, as the trigger 14 moves from the initial position in FIG. 2A to the end position in FIG. 2B , the first moving member 18 is driven by the trigger 14 and moves from the third position in FIG. 2A to FIG. 2B The fourth position in the.

It should be understood that although in this embodiment, the trigger 14 is used to actuate both the firing mechanism and The first moving part 18. However, in other embodiments, the platform assembly 12 may include two triggers, one for actuating the firing mechanism and another for actuating the first moving member.

As an example, the closure mechanism may also include a driver 40 and the platform assembly 12 may further include a guide rail 248 . By way of example, guide rails 248 may be formed on the inner wall of housing 14 . The first end of the driving member 40 is pivotally connected to the trigger 14, and the second end is guided by the guide rail 248.

As shown in FIGS. 2A and 2B , as the trigger 14 moves from the initial position to the end position, the second end of the driving member 40 abuts the first moving member 18 and pushes the first moving member 18 , so that the first moving member 18 moves from the first moving member 18 to the second moving member 18 . Position three moves to position four.

As shown in Figures 2B and 2C, when the trigger 14 is released, the trigger 14 returns to the initial position from the end position under the action of the force applying member 25, and the driving member 40 is separated from the first moving member 18 driven by the trigger 14. , the first moving member 18 is maintained in the fourth position.

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

As a possible implementation, referring again to FIG. 7 , the platform assembly 12 may also include a pin 41 . The first end of the driving member 40 can be pivotally connected to the trigger 14 through the 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 248.

Referring again to FIGS. 2A to 2E , the closing mechanism further includes a third force applying member 42 , which is used to apply a force on the third moving member 30 to cause the third moving member 30 to rotate from the end position to the initial position.

As an example, the third force-applying member 42 may be a compression spring, which is located proximal to the linkage member 31 and presses against the linkage member 31 . In some embodiments, the third force-applying member 42 can be sleeved on the elongated body 13 .

It can be understood that the third force-applying member can be implemented in various ways, and is not limited to the above-mentioned implementation ways. For example, in another example, the third force applying member may also be implemented as a torsion spring.

When the first moving part 18 is in the fourth position, as shown in FIGS. 2B to 2E , the first moving part 18 is located at a position that is substantially collinear with the second moving part 29 , that is, the first end of the first moving part 18 reaches The connection line between the second end and the connection line from the first end to the second end of the second moving part 29 are substantially co-linear.

Alternatively, when the first moving member 18 is located at the fourth position, the first moving member 16 is located at a position reached by passing through a collinear position with the second moving member 29 . That is to say, as the first moving part 18 moves from the third position to the fourth position, the first moving part 18 passes through a position that is collinear with the second moving part 29 .

In the above implementation manner, when the first moving part is located at the fourth position, the first moving part is located at a position that is substantially collinear with the second moving part (or the first moving part is located at a position that passes through a collinear position with the second moving part). And reach the position). At this time, the force exerted by the third force applying member on the third moving member will not cause the first moving member to return to the third position from the fourth position. In this way, after the trigger is released, the first moving member can be maintained in the fourth position, that is, the tool assembly can be maintained in a closed state.

In addition, in this implementation, when it is necessary to switch the tool assembly from closed to open, it is only necessary to drive the first moving part out of the fourth position, that is, to drive the first moving part to reverse (i.e., rotate in the first direction) to no longer Then it is collinear with the second moving part (or passes through a position that is collinear with the second moving part), and then the first moving part can return to the third position under the action of the third force-applying part, thereby causing the tool assembly to switch from closed to open, and cause the switching member to move from the second position to the first position.

There are many ways to cause the first moving part to leave the fourth position, and this disclosure does not specifically limit this.

Referring to FIGS. 9A to 9C , the first moving member 18 includes an extension portion 185 . When the first moving part 18 is in the fourth position, at least part of the extension 185 is located in the path of the axially proximal movement of the actuating part 17 .

When the first moving part 18 is required to return from the fourth position to the third position, that is, when the tool assembly is required to be switched from closed to open, the actuating part 17 may be pulled proximally along the axial direction. As shown in FIGS. 9A to 9C , as the actuator 17 moves proximally along the axial direction, the actuator 17 abuts against the extension part 185 and pushes the extension part 185 , so that the first moving part 18 rotates to be in contact with the second The moving parts 29 are no longer in a collinear position, and therefore the first moving part 18 can continue to rotate to the third position under the action of the third force-applying part 42 .

In this implementation, it is only necessary to pull the actuating member proximally along the axial direction 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 can reduce the number of components, thereby simplifying the structure of the stapler.

There are many ways to stop the first moving part in the fourth position, and this disclosure does not specifically limit this.

As an example, referring to FIG. 10 , the first end of the second moving part 29 may be provided with a rotation stop 293 . When the first moving part 18 rotates along the first direction to the fourth position, the anti-rotation part 293 abuts the first moving part 18 , thereby restricting the first moving part 18 from continuing to rotate after reaching the fourth position. In this way, the first moving part 18 can be stopped at the fourth position.

It can be understood that in other embodiments, the first moving part can be stopped at the fourth position in other ways. For example, in some embodiments, the first moving component may be provided with a rotation stop. For another example, in some embodiments, the first moving part can be blocked by a member fixed relative to the housing, thereby stopping the first moving part in the fourth position.

The specific structure of the stapler 10 is exemplarily described above with reference to the accompanying drawings. Next, refer again to FIGS. 2A to 2E to illustrate the operation process of the stapler 10 .

Initially, platform assembly 12 may be in the state in Figure 2A. At this time, the trigger 14 is at the initial position, the switching member 15 is at the first position, and the first moving member 18 is at the third position. At this time, the tool assembly 11 is in an open state and the firing mechanism is in a locked state.

As the trigger 14 moves under operation from the initial position to the terminal position, the platform assembly 12 switches from the state in Figure 2A to the state in Figure 2B. During this process, the first moving part 18 moves from the third position to the fourth position, causing the tool assembly 11 to switch from open to closed. In addition, during this process, the engaging member 16 also moves along with the movement of the trigger 14 . Since the switching member 15 is still in the first position, the firing mechanism is still in a locked state. Therefore, during this process, the meshing member 16 remains separated from the meshing portion 171, thereby not causing the work to be damaged. Tool assembly 11 is fired.

Next, release trigger 14. After the trigger 14 is released, under the action of the force applying member 25, the trigger 14 returns to the initial position from the end position, and the stapler 10 switches from the state in Figure 2B to the state in Figure 2C. During this process, the first moving part 18 remains in the fourth position. As shown in Figure 2C, when the stapler 10 is in the state in Figure 2C, the first moving part 18 remains in the fourth position and the tool assembly 11 remains closed.

Next, the operating member 21 is pressed. Pushed by the operating member 21, the switching member 15 moves along the guide rail from the first position to the second position. Since the first moving member 18 is in the fourth position at this time, the engaging member 16 can move to abut the stop surface 151 of the switching member 15 under the action of the first force-applying member 19 , thereby keeping the switching member 15 in the second position. Location. In this way, the firing mechanism switches from the locked state to the unlocked state, and the stapler 10 switches from the state in FIG. 2C to the state in FIG. 2D .

Then, operate trigger 14 again. As the trigger 14 moves from the initial position to the end position again, the stapler 10 switches from the state in Figure 2D to the state in Figure 2E. During this process, since the switching member 15 is in the second position, that is, the firing mechanism is in the unlocked state, as the trigger 14 moves from the initial position to the end position, the engaging member 16 engages with the engaging portion 171, thereby pushing the engaging member 16, so that The engagement member 16 moves axially distally, thereby causing the tool assembly 11 to fire.

Then, after completion of firing, the trigger 14 can be released and the actuator 17 can be pulled back to switch the stapler 10 from the state in Figure 2E to the state in Figure 2D. As shown in FIG. 2D , at this time, the trigger 14 is in the initial position, the first moving part 18 is in the fourth position, and the switching part 15 is in the second position.

Then, the first moving part or the second moving part may be driven so that the first moving part leaves the fourth position. After the first moving part leaves the fourth position, under the action of the third force-applying part 42, the first moving part 18 returns to the third position, and the stapler 10 switches from the state in FIG. 2D to the state in FIG. 2A. During this process, as the first moving part returns to the third position, the tool assembly 11 returns from closed to open. At the same time, the first moving part 18 pushes the meshing part 16 so that the meshing part 16 is separated from the stop surface of the switching part 15, and then under the action of the second force-applying part 20, the switching part 15 returns to the first position from the second position. position, thereby causing the firing mechanism to return from the unlocked state to the locked state.

Other embodiments of the present disclosure also provide a tissue suturing method. This method can be used to suture human or animal tissue. In particular, this method can be used to suture the digestive tract of humans or animals. The method includes: providing the stapler provided in the above embodiments of the present disclosure; and using the stapler to suture the tissue.

Above, certain embodiments of the present disclosure have been illustratively described. It can be understood that the implementation of the present disclosure is not limited to the above-mentioned embodiments. For example, in other embodiments, the platform assembly may include a carrier independent of the trigger, the engagement member may be supported by the carrier, and the switch may be positioned in a guide formed on the carrier. In this implementation, the trigger can be transmission connected with the bearing member, so that the bearing member can move as the trigger is operated, thereby driving the engagement member to move.

It should be understood that although the terms "first" or "second" and the like may be used to describe various elements (such as a first force applying member and a second force applying member) in this disclosure, these elements are not limited by these terms. , these terms are used only to distinguish one element from another.

It should be noted that each of the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner without conflict. In order to avoid unnecessary repetition, this disclosure discusses various possible combinations. The method will not be further explained.

The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person familiar with the technical field who can think of changes or substitutions within the technical scope disclosed in the present disclosure should do so. are covered by the protection scope of this disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

A platform assembly is characterized in that it is suitable for a stapler and includes:

trigger;

The switching member has a stop surface and can move between the first position and the second position;

The firing mechanism includes an engaging member and an actuating member having an engaging portion, wherein the engaging member moves as the trigger is operated; when the switching member is in the first position, as the trigger is operated, the The engaging member remains separated from the engaging portion; when the switching member is in the second position, as the trigger is operated, the engaging member engages the engaging portion and pushes the actuating member, thereby causing The tool assembly of the stapler is fired; and

A closing mechanism includes a first moving part, wherein as the first moving part moves from the third position to the fourth position, the closing mechanism causes the tool assembly to switch from open to closed; when the first moving part When it is in the third position, it can limit the movement of the meshing member by abutting against the engaging member until it abuts the stop surface; when the first moving member is in the fourth position, it can The movement of the engaging member is not restricted to abut against the stop surface, so that the engaging member can maintain the switching member in the second position by abutting against the stop surface.
The platform assembly according to claim 1, wherein when the switching member is in the second position and the trigger is not operated, the first moving member returns to the fourth position from the fourth position. In the third position, the first moving part causes the engaging part to move to separate from the stop surface.
The platform assembly of claim 2, wherein the first moving member has a cam surface, and when the switching member is in the second position and the trigger is not operated, the first movement is The member moves from the fourth position to the third position, and the cam surface abuts the meshing member to guide the meshing member to separate from the stop surface.
The platform assembly according to any one of claims 1 to 3, wherein when the switching member is in the second position and the trigger is not operated, the first moving member abuts the The meshing member is configured to restrict the meshing member from meshing with the meshing portion.
The platform assembly according to any one of claims 1 to 4, wherein the firing mechanism further includes a first force-applying member that applies a first force to the engaging member, wherein When the first moving member is in the third position, it abuts against the meshing member to limit the movement of the meshing member under the first force to abut against the stop surface; When the first moving part is in the fourth position, the engaging part can move to abut against the stop surface under the first force.
The platform assembly according to any one of claims 1 to 5, further comprising a second force applying member, the second force applying member exerts a second force on the switching member, wherein when the When the engaging member abuts the stop surface, the engaging member restricts the switching member from returning to the first position from the second position under the second force.
The platform assembly according to claim 6, wherein the trigger is provided with a guide rail, the switching member is placed in the guide rail and can be moved between the first position and the second position along the guide rail. movement between, the switching member includes a first shoulder, the guide rail includes a second shoulder, the first shoulder and the second shoulder move along the direction of the switching member from the first position to the The movement directions of the second position are arranged in sequence. The second force-applying member is a compression spring. One end of the compression spring is pressed against the first shoulder and the other end is pressed against the second shoulder.
The platform assembly according to any one of claims 1 to 4, wherein the firing mechanism further includes a first force-applying member that applies a first force to the engaging member, When the switching member is in the first position and the trigger is operated, the switching member supports the engaging member so that the engaging member overcomes the first force and remains with the engaging portion. Separate; when the switching member is in the second position, as the trigger is operated, the engaging member engages with the engaging portion under the first force.
The platform assembly according to claim 8, wherein the switching member further has a first step surface and a second step surface, the first step surface protrudes beyond the second step surface, and the stop The surface is located between the first step surface and the second step surface, wherein when the switching member is in the first position and the trigger is operated, the first step surface supports the engaging member ; When the switching member is in the second position, the second step surface supports the engaging member as the trigger is operated.
The platform assembly of claim 8, wherein the engaging member is pivotably supported by the trigger about a first axis, and the first force is used to cause the engaging member to rotate about the first axis. The axis rotates along a first direction, and the trigger is pivotably supported about a second axis, wherein as the trigger is operated, the trigger moves along a second axis about the second axis opposite to the first direction. The direction rotates from the initial position to the end position.
The platform assembly according to any one of claims 1 to 10, wherein the first moving member is pivotably supported at its first end about a third axis, and the closing mechanism further includes:

a second moving part, the first end of which is pivotally connected to the second end of the first moving part;

A third moving member has a first end pivotally connected to the second end of the second moving member and is pivotally supported at its second end about a fourth axis; and

a linkage member located at least partially proximally of the third moving member and against the third moving member, wherein

As the first moving part rotates around the third axis from the third position to the fourth position, the third moving part rotates around the fourth axis and causes the linkage part to move axially toward Proximal movement, thereby causing the tool assembly to switch from open to closed.
A stapler, characterized by comprising the platform assembly according to any one of claims 1 to 11.