Linear cutting stapler

Abstract

The utility model provides a linear cutting anastomat, including detachable buckle handle upper shell and handle lower shell, handle lower shell inside slide connection has push rod, and the one end of push rod is connected with the piece of stirring away from the nail storehouse, and the piece of stirring includes the rotation connecting portion and both sides of the piece of stirring of integral connection, and the rotation connecting portion is rotatable with the push rod end rotatable connection, and two pieces of stirring respectively extend the both sides of the middle seam between handle upper shell and handle lower shell, and the unilateral or both sides of the piece of stirring is driven to drive push rod along handle lower shell length direction feed, and the rotation connecting portion of two pieces of stirring middle is rotatable with the push rod end rotatable connection, and the size and position of the piece of stirring adapt the size of the middle seam between handle upper shell and handle lower shell, make both sides of the piece of stirring all be located the outside of the middle seam, and the operation of hand pushing is convenient, and the feed of push rod can be pushed to the piece of stirring of any one side, and the manual operation of any one side can be normally carried out, and the rotation side design of pushing the rotation of the structure of firing structure is omitted, and the position structure design is simplified.

Description

Technical Field

[0001] This utility model relates to the field of medical surgical instruments, and more specifically, to a linear cutting and anastomosis device. Background Technology

[0002] Before the introduction of surgical staplers, surgeons had to spend a significant amount of time re-suturing patients' tissues together. This was once the most time-consuming aspect of surgery. Surgical staplers reduce the amount of time users spend re-suturing tissues together. Such surgical staplers are described in patent CN102088916B.

[0003] Surgical staplers are typically relatively complex mechanical instruments, making sterilization difficult after use. Therefore, many commercially available surgical staplers are disposable, or have components that are disposable or easily replaceable. Linear cutting staplers are a type of stapler designed primarily for suturing straight wounds. Their main components include a handle, a staple cartridge at the front of the handle, and an anvil. A push rod on the handle ejects staples from the cartridge. A firing mechanism on the handle propels the staples along the length of the handle, which, in conjunction with the anvil, completes the suturing. The firing mechanism is usually located on one side of the handle. In some designs, a through-slot connects the two sides of the handle, extending to the rear of the handle. The firing mechanism and push rod are rotatable, allowing the firing mechanism to rotate through the rear of the handle to the other side, accommodating different surgeons' operating habits and left- or right-handed positions. However, this structure also has some drawbacks. The connection between the firing mechanism and the push rod, as well as the corresponding structure at the rear of the handle to accommodate the rotation of the firing mechanism, make the structure quite complex and prone to failure during use. Furthermore, the processing and assembly of the device are relatively complicated.

[0004] In summary, the existing linear cutting stapler design suffers from technical problems such as complex structure and susceptibility to failure. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing linear cutting stapler design has a complex structure and is prone to failure.

[0006] To address the aforementioned problems, this utility model provides a linear cutting anastomosis device, comprising a detachable and snap-fit ​​upper handle shell and a lower handle shell. An anvil is mounted and connected to the end of the upper handle shell, and a staple cartridge is mounted and connected to the end of the lower handle shell corresponding to the anvil. A push rod is slidably connected inside the lower handle shell, and an actuating element is connected to the end of the push rod opposite to the staple cartridge. The actuating element includes an integrally connected rotating connecting part and two paddles respectively connected to both sides of the rotating connecting part. The rotating connecting part is rotatably connected to the end of the push rod, and the two paddles extend from both sides of the central seam between the upper and lower handle shells. By pushing one or both paddles, the push rod is driven to advance along the length direction of the lower handle shell.

[0007] This utility model further optimizes the structure of the commonly used linear cutting stapler on the market, mainly addressing the problem of complex push-firing mechanism. The actuating component for pushing the push rod includes two paddles, which are rotatably connected to the end of the push rod via a rotating connection in the middle. The size and position of the paddles are adapted to the size of the gap between the upper and lower handle housings, ensuring that both paddles are located outside the gap for easy hand-held operation. Pushing either paddle advances the push rod, and manual operation from either side is possible without the need to manually switch the corresponding mechanism to the corresponding side as in existing designs. This eliminates the need for the rotating side-switching design of the push-firing mechanism, simplifying the structural design at this location and avoiding the malfunctions caused by too many moving parts. It also reduces the processing difficulty and technical requirements of the components, effectively solving the technical problem of complex structure and malfunctions in existing linear cutting staplers.

[0008] As a preferred embodiment, the end of the push rod connected to the actuating element is connected to a sliding seat. The sliding seat has sliding bosses on both sides for sliding engagement with the inner wall of the lower handle housing. A raised rotating pin is provided on the top surface of the sliding seat, and the rotating connection part has a through-hole structure for insertion with the rotating pin. This design optimizes the connection between the push rod and the actuating element by specifically designing a sliding seat structure. The sliding bosses on both sides of the sliding seat first allow for a sliding engagement between the push rod and the lower handle housing, ensuring smooth push rod feeding. The rotating pin on the top surface of the sliding seat can be inserted into the through-hole of the rotating connection part. This engagement provides rotational margin between the actuating element and the push rod. This design allows the actuating element to drive the push rod with a certain amount of movement space, making the actuating element's pushing action smoother, avoiding jamming, and preventing unnecessary damage to moving parts caused by jamming.

[0009] As a preferred embodiment, a pin-connecting plate is integrally connected to one end of the push rod that connects to the sliding seat. The bottom of the sliding seat has a slot for inserting into the pin-connecting plate. Corresponding pin holes are provided on both the pin-connecting plate and the sliding seat. The sliding seat and the pin-connecting plate are connected by a pin. This design optimizes the connection structure between the push rod end and the sliding seat. The push rod and the sliding seat are connected by a pin-connecting plate inserted into the slot of the sliding seat, and a pin structure passes between them, providing a certain dynamic margin between them, which is beneficial for the driving action.

[0010] As a preferred embodiment, the surfaces of the two paddles are at right angles, with one paddle perpendicular to the length direction of the push rod and the other paddle parallel to the length direction of the push rod. This design optimizes the specific structural distribution of the actuating element, ensuring that the surfaces of the two paddles are perpendicular to each other. This allows the other paddle to be parallel to the length direction of the push rod when one paddle is perpendicular to it, facilitating the force distribution on the paddle.

[0011] As a preferred embodiment, the rotating pin is cylindrical, with a limiting boss at the top of its outer peripheral wall. The inner peripheral wall of the through-hole structure of the rotating connection part has an axially oriented limiting groove, and the limiting boss slides into the limiting groove. This design optimizes the position of the rotating pin and the through-hole by providing a protruding limiting boss near the top of the outer peripheral wall of the rotating pin and an axially oriented limiting groove on the inner peripheral wall of the through-hole. This allows the limiting boss to sink into the limiting groove, forming a concave-convex fit and circumferentially positioning the rotating pin and the through-hole. This structure effectively positions the actuating component and the sliding seat, preventing unnecessary movement.

[0012] As a preferred embodiment, the top end face of the rotating connection has a right-angled arc groove at the edge of the through hole structure. The end of the limiting groove communicates with the arc groove, which is used to lift the rotating connection and allow the limiting boss to reach the height of the arc groove, so that the actuating member can rotate relative to the sliding seat to adjust the angle of the paddle.

[0013] This design adapts to the structure of the limiting boss and the limiting groove. An arc-shaped countersunk groove with a 90° arc is provided around the through hole of the rotating connection part, and it connects to the limiting groove at the top of the through hole. With this structure, when the rotating pin undergoes axial relative displacement with the through hole, and when the limiting boss reaches the axial position of the arc groove, the circumferential positioning between the limiting groove and the limiting boss is released. There is a 90° rotational space margin between the rotating pin and the rotating connection part. Through this rotational margin, the lever angle has a 90° rotational adjustment range, and the lever on one side can be adjusted from a position parallel to the push rod. Rotate the device to a position perpendicular to the push rod, while the other side rotates in the opposite direction, thus switching the action of the push rod driven by the shifter. This design is well-suited for the operation of linear cutting staplers. When the operator manually moves the shifter by finger, in addition to applying a force parallel to the push rod's feed direction, a component force perpendicular to the push rod can be easily generated. This easily pushes the shifter along the axial direction of the rotating pin, allowing the limiting boss to reach the position of the arc groove, facilitating the switching of the shifter's action.

[0014] As a preferred embodiment, the upper housing of the handle has a positioning post perpendicular to the length direction of the push rod at its end corresponding to the sliding seat. The sliding seat has a snap-fit ​​structure at its end opposite to the side connected to the push rod. This snap-fit ​​structure has a groove shaped to fit the outer contour of the positioning post, used to position the sliding seat by engaging with the positioning post. This design meets the basic operational needs of a linear stapler, locking the relative position between the push rod and the upper housing of the handle when no surgical staple output is being performed, preventing accidental triggering. By providing a positioning post at the tail end of the upper housing of the handle and a snap-fit ​​structure at the corresponding end of the sliding seat, the axial position of the push rod is fixed through convenient engagement between the two.

[0015] As a preferred embodiment, the surface direction of each paddle is perpendicular to the end face direction of the rotating connection, and the paddle and the rotating connection are integrally formed. This design optimizes the distribution of paddles on the actuating component, and the integral connection between the paddle and the rotating connection simplifies the forming process and reduces production costs. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a linear cutting stapler provided by this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the disassembled structure of a linear cutting stapler;

[0018] Figure 3 for Figure 1 A partial structural diagram of a linear cutting stapler;

[0019] Figure 4 for Figure 1 A partial structural diagram of the area near the actuating component of a linear cutting stapler;

[0020] in, Figures 1-4 middle:

[0021] 1. Upper handle housing; 2. Anvil; 3. Pin magazine; 4. Lower handle housing; 5. Push rod; 5-1. Pin plate; 6. Actuating component; 6-1. Rotating connection; 6-2. Paddle; 6-3. Through hole structure; 6-4. Limiting groove; 6-5. Arc groove; 7. Sliding seat; 7-1. Rotating pin; 7-2. Sliding boss; 7-3. Limiting boss; 7-4. Snap-fit ​​structure; 8. Positioning post. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] refer to Figures 1-4 The following examples illustrate this. Figure 1 A schematic diagram of the overall structure of a linear cutting stapler provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the disassembled structure of a linear cutting stapler; Figure 3 for Figure 1A partial structural diagram of a linear cutting stapler; Figure 4 for Figure 1 A partial structural diagram of the area near the actuating component of a linear cutting stapler.

[0026] This utility model provides a linear cutting anastomosis device, including a detachable and snap-fit ​​upper handle shell 1 and a lower handle shell 4. An anvil 2 is installed and connected to the end of the upper handle shell 1. A staple cartridge 3 is installed and connected to one end of the lower handle shell 4 corresponding to the anvil 2. A push rod 5 is slidably connected inside the lower handle shell 4. An actuating element 6 is connected to the end of the push rod 5 away from the staple cartridge 3. The actuating element 6 includes an integrally connected rotating connecting part 6-1 and two paddles 6-2 respectively connected to both sides of the rotating connecting part 6-1. The rotating connecting part 6-1 is rotatably connected to the end of the push rod 5. The two paddles 6-2 extend out from both sides of the central seam between the upper handle shell 1 and the lower handle shell 4. By pushing one or both paddles 6-2, the push rod 5 is driven to feed along the length direction of the lower handle shell 4.

[0027] This utility model further optimizes the structure of the commonly used linear cutting stapler on the market, mainly addressing the problem of complex push-firing structure. The actuating component 6 used to push the push rod 5 includes two paddles 6-2, which are rotatably connected to the end of the push rod 5 through the rotating connecting part 6-1 in the middle of the two paddles 6-2. The size and position of the paddles 6-2 are adapted to the size of the gap between the upper shell 1 and the lower shell 4 of the handle, so that the paddles 6-2 on both sides are located outside the gap, which is convenient for hand-held pushing operation. Pushing either paddle 6-2 will push the push rod 5 forward. Manual operation can be performed normally on either side without having to turn the corresponding mechanism to the corresponding side as in the existing design. The rotating side-changing design of the push-firing structure is omitted, thereby simplifying the structural design at this position, avoiding the problem of easy failure caused by too many moving parts, and correspondingly reducing the processing difficulty and technical requirements of the parts. It effectively solves the technical problem of complex structure and easy failure in the existing linear cutting stapler design.

[0028] In the technical solution provided in this embodiment, the end of the push rod 5 connected to the actuating member 6 is connected to a sliding seat 7. The sliding seat 7 has sliding bosses 7-2 on both sides for sliding cooperation with the inner side wall of the lower shell 4 of the handle. The top surface of the sliding seat 7 is provided with a protruding rotating pin 7-1. The rotating connection part 6-1 is provided with a through hole structure 6-3 for inserting into the rotating pin 7-1. This design optimizes the connection between the push rod 5 and the actuating element 6, and specifically sets up a sliding seat 7. The sliding seat 7, through the design of the sliding bosses 7-2 on both sides, can first form a sliding fit between the push rod 5 and the lower shell 4 of the handle, ensuring smooth feeding of the push rod 5. The rotating pin 7-1 on the top surface of the sliding seat 7 can be inserted into the through hole of the rotating connection part 6-1. This fit provides rotational margin between the actuating element 6 and the push rod 5. This design allows the pusher 6-2 to have a certain amount of room to move, making the pushing action of the pusher 6-2 smoother, avoiding jamming, and preventing unnecessary damage to the moving parts caused by jamming.

[0029] In the technical solution provided in this embodiment, a pin plate 5-1 is integrally connected to one end of the push rod 5 connecting to the sliding seat 7. The bottom of the sliding seat 7 is provided with a slot for insertion into the pin plate 5-1. Pin holes are provided at corresponding positions on both the pin plate 5-1 and the sliding seat 7. The sliding seat 7 and the pin plate 5-1 are connected by a pin. This design optimizes the docking structure between the end of the push rod 5 and the sliding seat 7. The push rod 5 and the sliding seat 7 are connected by the pin plate 5-1 inserted into the slot of the sliding seat 7, and a pin structure is provided between them, providing a certain dynamic margin between them, which is beneficial for the driving action.

[0030] In the technical solution provided in this embodiment, the surfaces of the two levers 6-2 are at right angles. When one lever 6-2 is perpendicular to the length direction of the push rod 5, the other lever 6-2 is parallel to the length direction of the push rod 5. This design optimizes the specific structural distribution of the actuating element 6. The surfaces of the two levers 6-2 are perpendicular to each other, so that when one lever 6-2 is perpendicular to the length direction of the push rod 5, the other lever 6-2 can be parallel to the length direction of the push rod 5, which is beneficial for the lever 6-2 to bear force.

[0031] In the technical solution provided in this embodiment, the rotating pin 7-1 is cylindrical, and a limiting boss 7-3 is provided at the top of the outer peripheral wall of the rotating pin 7-1. The inner peripheral wall of the through hole structure 6-3 of the rotating connection part 6-1 is provided with a limiting groove 6-4 along the axial direction, and the limiting boss 7-3 and the limiting groove 6-4 are slidably engaged. This design optimizes the position of the rotating pin 7-1 and the through hole by providing a protruding limiting boss 7-3 near the top of the outer peripheral wall of the rotating pin 7-1 and a limiting groove 6-4 along the axial direction on the inner peripheral wall of the through hole. The limiting boss 7-3 can sink into the limiting groove 6-4 to form a concave-convex fit, thereby creating a circumferential positioning between the rotating pin 7-1 and the through hole. This structure can rotate and position the actuating member 6 and the sliding seat 7, avoiding unnecessary movement.

[0032] In the technical solution provided in this embodiment, the top end face of the rotating connecting part 6-1 has a circular arc groove 6-5 with a right angle at the edge of the through hole structure 6-3. The end of the limiting groove 6-4 is connected to the circular arc groove 6-5, which is used to lift the rotating connecting part 6-1 and the limiting boss 7-3 reaches the height of the circular arc groove 6-5, so that the actuating member 6 can rotate relative to the sliding seat 7 to adjust the angle of the actuating piece 6-2.

[0033] This design adapts to the structure of the limiting boss 7-3 and the limiting groove 6-4. An arc-shaped countersunk groove with a 90° arc is provided around the through hole of the rotating connection 6-1, and it communicates with the limiting groove 6-4 at the top of the through hole. With this structure, when the rotating pin 7-1 undergoes axial relative displacement with the through hole, and when the limiting boss 7-3 reaches the axial position of the arc groove 6-5, the circumferential positioning between the limiting groove 6-4 and the limiting boss 7-3 is released. There is a 90° rotational space margin between the rotating pin 7-1 and the rotating connection 6-1. Through this rotational margin, the angle of the lever 6-2 has a 90° rotational adjustment range. The lever 6-2 on one side can be adjusted from a parallel... When the push rod 5 is rotated to a position perpendicular to the push rod 5, the other side of the lever 6-2 rotates in the opposite direction, thereby switching the action side of the lever 6-2 that drives the push rod 5. This design can be well adapted to the operation of a linear cutting stapler. When the linear cutting stapler is held normally, when the operator moves the lever 6-2 of the lever 6 with their finger, in addition to applying a force parallel to the feed direction of the push rod 5, a component force perpendicular to the direction of the push rod 5 can be easily generated. That is, it is easy to push the lever 6 to move along the axial direction of the rotating pin 7-1, so that the limiting boss 7-3 reaches the position of the arc groove 6-5, making it convenient to switch the action of the lever 6-2.

[0034] In the technical solution provided in this embodiment, a positioning post 8 perpendicular to the length direction of the push rod 5 is provided at the end of the upper shell 1 corresponding to the sliding seat 7. A snap-fit ​​structure 7-4 is provided at the end of the sliding seat 7 opposite to the side connected to the push rod 5. The snap-fit ​​structure 7-4 has a groove whose shape matches the outer contour of the positioning post 8, used to position the sliding seat 7 by engaging with the positioning post 8. This design adapts to the basic working needs of a linear cutting stapler, locking the relative position between the push rod 5 and the upper shell 1 when no surgical staple output is being performed, preventing accidental triggering. By providing the positioning post 8 at the tail end of the upper shell 1 and the snap-fit ​​structure 7-4 at the corresponding end of the sliding seat 7, the axial position of the push rod 5 is fixed through convenient engagement between the two.

[0035] In the technical solution provided in this embodiment, the plate surface direction of the paddle 6-2 is perpendicular to the end face direction of the rotating connection part 6-1, and the paddle 6-2 and the rotating connection part 6-1 are integrally formed and connected. This design optimizes the distribution design of the paddles 6-2 on the actuating component 6, and the paddle 6-2 and the rotating connection part 6-1 are integrally formed, which simplifies the molding process and reduces production costs.

[0036] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A linear cutting stapler, comprising a detachable and snap-fit ​​upper handle shell (1) and a lower handle shell (4), wherein an anvil (2) is mounted and connected to one end of the upper handle shell (1), and a staple cartridge (3) is mounted and connected to one end of the lower handle shell (4) corresponding to the anvil (2), and a push rod (5) is slidably connected inside the lower handle shell (4), characterized in that, The push rod (5) has a toggle (6) connected to one end away from the nail chamber (3). The toggle (6) includes an integrally connected rotating connection part (6-1) and paddles (6-2) respectively connected to both sides of the rotating connection part (6-1). The rotating connection part (6-1) is rotatably connected to the end of the push rod (5). The two paddles (6-2) extend out from both sides of the central seam between the upper shell (1) and the lower shell (4) of the handle. By pushing one or both paddles (6-2), the push rod (5) is driven to feed along the length direction of the lower shell (4).

2. The linear cutting stapler according to claim 1, characterized in that, The end of the push rod (5) connected to the actuating member (6) is connected to a sliding seat (7). The sliding seat (7) has sliding bosses (7-2) on both sides for sliding cooperation with the inner side wall of the lower shell (4) of the handle. The top surface of the sliding seat (7) is provided with a protruding rotating pin (7-1). The rotating connection part (6-1) is provided with a through hole structure (6-3) for insertion with the rotating pin (7-1).

3. The linear cutting stapler according to claim 2, characterized in that, The push rod (5) is integrally connected to a pin plate (5-1) at one end of the sliding seat (7). The bottom of the sliding seat (7) is provided with a slot for insertion into the pin plate (5-1). The pin plate (5-1) and the sliding seat (7) are provided with pin holes at corresponding positions. The sliding seat (7) and the pin plate (5-1) are connected by a pin.

4. The linear cutting stapler according to claim 2, characterized in that, The surfaces of the two paddles (6-2) are at right angles. When one paddle (6-2) is perpendicular to the length direction of the push rod (5), the other paddle (6-2) is parallel to the length direction of the push rod (5).

5. The linear cutting stapler according to claim 2, characterized in that, The rotating pin (7-1) is cylindrical, and a limiting boss (7-3) is provided at the top of the outer peripheral wall of the rotating pin (7-1). The inner peripheral wall of the through hole structure (6-3) of the rotating connection part (6-1) is provided with a limiting groove (6-4) along the axial direction. The limiting boss (7-3) and the limiting groove (6-4) are in sliding fit.

6. The linear cutting stapler according to claim 5, characterized in that, The top end face of the rotating connecting part (6-1) has a circular arc groove (6-5) with a right angle at the edge of the through hole structure (6-3). The end of the limiting groove (6-4) is connected to the circular arc groove (6-5) and is used to lift the rotating connecting part (6-1) so that the limiting boss (7-3) reaches the height of the circular arc groove (6-5), allowing the actuating member (6) to rotate relative to the sliding seat (7) to adjust the angle of the paddle (6-2).

7. The linear cutting stapler according to claim 2, characterized in that, The upper shell (1) of the handle is provided with a positioning post (8) perpendicular to the length direction of the push rod (5) at the end corresponding to the position of the sliding seat (7). The sliding seat (7) is provided with a buckle structure (7-4) at the end opposite to the side connected to the push rod (5). The buckle structure (7-4) is provided with a groove whose shape matches the outer contour of the positioning post (8) for positioning the sliding seat (7) by engaging the buckle structure (7-4) with the positioning post (8).

8. The linear cutting stapler according to claim 1, characterized in that, The plate surface direction of the paddle (6-2) is perpendicular to the end face direction of the rotating connection part (6-1), and the paddle (6-2) and the rotating connection part (6-1) are integrally formed and connected.

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