End actuator for suturing instrument and suturing instrument

Abstract

The end portion actuator comprises a jaw assembly and a cutting component, the jaw assembly comprises a first jaw component, the first jaw component is provided with a feed groove, the jaw assembly is provided with a free end capable of being opened and closed, and the feed groove is provided with a feed groove. The cutting component is provided with a free end and a feed groove, the feed groove extends towards the free end, the cutting component comprises a linear cutting edge capable of moving in the extending direction of the feed groove, the linear cutting edge is arranged in the feed groove towards the free end and is provided with a cutting part located above the feed groove, and an acute angle is formed between the linear cutting edge and the extending direction of the feed groove. The utility model solves the problems that the cutting effect is poor and the to-be-cut tissue is easy to slip when the cutting component cuts the tissue in a horizontal pushing manner.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an end effector for a suturing instrument and a suturing instrument. Background Technology

[0002] With the advancement of medical technology, laparoscopic surgery has become an indispensable part of modern medicine. Compared with traditional open surgery, laparoscopic surgery has many advantages, such as less trauma, faster postoperative recovery, and fewer complications. The widespread application of this technology is due to a series of carefully designed laparoscopic surgical instruments that can precisely reach the surgical site through tiny cannulas, achieving minimally invasive treatment.

[0003] In existing laparoscopic surgical instruments, distal actuators play a crucial role. These actuators can enter human tissues in various ways to perform diagnostic or therapeutic tasks. However, despite significant advancements in current technology, several problems remain to be solved.

[0004] In the cutting components of some existing end effectors, reference Figure 1 As shown, the cutting assembly 92 includes a cutting tool 920, which includes a cutting edge for cutting the tissue to be cut. This cutting edge is typically designed to be arc-shaped and is integrated with... Figure 1 As shown, the cutting edge of the cutting tool 920 is formed by the smooth connection of the first arc-shaped cutting edge 9201 and the second arc-shaped cutting edge 9202.

[0005] Understandably, the curved cutting edge of the 920 cutting tool allows for flat-pushing tissue cutting. However, in practice, this design often results in poor cutting outcomes. Because the contact area between the curved cutting edge and the tissue changes continuously during the flat-pushing process, it's difficult to uniformly control the cutting force and depth. This not only affects the precision and efficiency of the surgery but may also cause unnecessary displacement of the tissue being cut, thereby increasing surgical risks. Utility Model Content

[0006] The purpose of this invention is to provide an end effector for a suturing instrument and a suturing instrument, so as to solve the problem that the cutting effect is not good and the tissue to be cut is prone to slippage when the cutting component cuts tissue in a flat pushing manner in the prior art.

[0007] To achieve the above-mentioned objectives of this utility model, an embodiment of this utility model provides an end effector for a suturing instrument, including a jaw assembly and a cutting component. The jaw assembly includes a first jaw component with a cutting groove. The jaw assembly has an openable and closable free end, and the cutting groove extends toward the free end. The cutting component includes a straight cutting edge that can move along the extension direction of the cutting groove. The straight cutting edge is disposed in the cutting groove toward the free end and has a cutting portion located above the cutting groove. The straight cutting edge is set at an acute angle to the extension direction of the cutting groove.

[0008] As a further improvement to the embodiment of this utility model, the acute angle is 35°~55°.

[0009] As a further improvement of this utility model embodiment, the cutting component further includes a lower cutting edge and a connecting cutting edge. The lower cutting edge faces upward and extends along an extension direction parallel to the cutting groove. The lower cutting edge is smoothly connected to the lower end of the straight cutting edge through the connecting cutting edge, and both the lower cutting edge and the connecting cutting edge are located on the side of the straight cutting edge near the free end.

[0010] As a further improvement to the embodiment of this utility model, the connecting cutting edge is set to an arc shape.

[0011] As a further improvement of this utility model embodiment, the cutting member includes an upper cutting edge, which faces downward and extends along an extension direction parallel to the cutting groove. The upper cutting edge is smoothly connected to the upper end of the straight cutting edge and is located on the side of the straight cutting edge near the free end.

[0012] As a further improvement to the embodiment of this utility model, the upper cutting edge, the straight cutting edge, the connecting cutting edge, and the lower cutting edge are integrally formed.

[0013] As a further improvement of this utility model embodiment, the cutting member is provided with a mounting shaft, the two ends of the mounting shaft extend laterally beyond the cutting member, the sidewall of the cutting groove is provided with guide grooves, and the two ends of the mounting shaft are slidably disposed in the guide grooves.

[0014] As a further improvement to the present invention, the mounting shaft is configured as a cylinder, and the mounting shaft is pivotally inserted into the guide groove.

[0015] As a further improvement of this utility model embodiment, the jaw assembly further includes a second jaw member, one end of which is pivotally connected to one end of the first jaw member away from the free end, and the other end of the second jaw member forms its free end. At least one of the first jaw member and the second jaw member can be drivably pivoted toward or away from the other.

[0016] This invention also provides a suturing device, which includes the end effector as described above.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] As the straight cutting edge moves toward its free end, it cuts the tissue to be cut. The straight cutting edge can apply pressure to the tissue to be cut, and the direction of this pressure is at a one-degree angle to the horizontal and downward, which can help to cut the tissue to be cut. During the cutting process, the straight cutting edge can also limit the tissue to be cut, thereby preventing the tissue to be cut from shifting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cutting component of an end effector in the prior art;

[0020] Figure 2 This is a schematic diagram of the structure of an end effector provided in an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the exploded structure;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure of the cutting component;

[0023] Figure 5 for Figure 1 Top view after removing the second jaw component;

[0024] Figure 6 for Figure 5 Cross-sectional view along the AA direction;

[0025] Figure 7 for Figure 6 Enlarged view at point M;

[0026] Figure 8 for Figure 4 Exploded view of the structure of the cut component.

[0027] The above description of the figures includes the following reference numerals:

[0028] 92. Cutting components;

[0029] 920. Cutting tools;

[0030] 9201, First arc-shaped cutting edge;

[0031] 9202, Second arc-shaped cutting edge;

[0032] 921. Tool mounting bracket;

[0033] 9211. Tool mounting slot;

[0034] 1. Jaw assembly;

[0035] 101. Free end;

[0036] 11. First jaw component;

[0037] 111. Stapling;

[0038] 1111, Tool groove;

[0039] 112. Push pin slider;

[0040] 113. Stud cartridge base;

[0041] 12. Second jaw component;

[0042] 2. Cutting components;

[0043] 20. Cutting knife;

[0044] 201. Upper cutting edge;

[0045] 202. Straight cutting edge;

[0046] 203. Connect the cutting edge;

[0047] 204. Lower cutting edge;

[0048] 21. Cutting blade mounting bracket;

[0049] 211. Mounting slot

[0050] 212. Install the shaft;

[0051] 213. Boss;

[0052] 22. Pusher rod;

[0053] 3. Stitching nails;

[0054] 4. Tissue to be cut;

[0055] ①, Zone I;

[0056] ②, Zone II. Detailed Implementation

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0059] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0060] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0061] like Figure 2-8 As shown, an embodiment of the present invention provides an end effector for a suturing instrument, including a jaw assembly 1 and a cutting member 2. The jaw assembly includes a first jaw member 11, which has a cutting groove 1111. The jaw assembly has an openable free end 101, and the cutting groove 1111 extends toward the free end 101.

[0062] refer to Figure 4 and Figure 6 The cutting member 2 includes a straight cutting edge 202 that can move along the extension direction of the cutting groove 1111. The straight cutting edge 202 is disposed in the cutting groove facing the free end 101 and has a cutting portion located above the cutting groove.

[0063] Further reference Figure 7 In detail, the straight cutting edge 202 is set at an acute angle to the extension direction of the tool groove 1111, and the acute angle is angle a in the figure.

[0064] Understandably, the end effector for suturing instruments provided by this utility model mainly includes a jaw assembly 1 and a cutting component 2. Its unique design not only improves the convenience of surgical operation, but also enhances the cutting effect.

[0065] Optionally, in this utility model, the first jaw component 11 includes a staple cartridge 111, a staple pusher slider 112, and a staple cartridge base 113. The staple cartridge 111 can be detachably mounted on the staple cartridge base 113 via a connector, so that when the staple cartridge base 113 moves, the staple cartridge 111 can remain fixed relative to the staple cartridge base 113.

[0066] Typically, the tool groove 1111 is formed along the length of the first jaw member 11 and extends toward the free end 101. Combined with Figure 2 In the middle, the tool groove 1111 is opened in the left-right direction and extends towards the free end 101 located on the left. Understandably, Figure 2 The left and right directions can be defined as the length direction of the first jaw member 11, that is, the axial direction of the first jaw member 11.

[0067] Furthermore, in this embodiment, the length direction (axial direction) of the staple cartridge 111 is also the length direction (axial direction) of the first jaw member 11, and the cutting groove 1111 is set along the length direction of the staple cartridge.

[0068] Furthermore, in this embodiment, several rows of staples 3 are arranged radially along the staple cartridge 111. These staples 3 are used to suture the tissue 4 to be cut.

[0069] This design makes the suturing operation more flexible and adaptable to the needs of different surgical scenarios. At the same time, the cutting groove 1111 is cleverly arranged on the staple cartridge 111, which saves space and ensures that the cutting component 2 can move stably on the predetermined track.

[0070] As mentioned above, the design of the cutting component 2 is ingenious. The cutting component 2 includes a straight cutting edge 202, which is positioned towards the free end 101 and forms an acute angle with the extending direction of the feed groove, that is, it forms an acute angle with the movement direction of the straight cutting edge 202. (Reference) Figure 7 The optimal display, the acute angle it forms is Figure 7 The acute angle α in the equation.

[0071] With this configuration, the straight cutting edge 202 cuts the tissue 4 to be cut as it moves toward the free end 101. The straight cutting edge 202 can apply pressure to the tissue 4 to be cut. The direction of this pressure is at an angle of one degree to the horizontal direction and downward, which helps to cut the tissue 4 to be cut.

[0072] In addition, during the cutting process, the straight cutting edge 202 can also limit the tissue 4 to be cut, which can prevent the tissue 4 to be cut from shifting.

[0073] Next, through Figure 1 and Figure 4 The best display allows for a comparison between the cutting component 92 in the prior art and the cutting component 2 in this utility model.

[0074] Figure 1 This is a schematic diagram of the structure of the cutting component 92 in the prior art; and Figure 4This is a schematic diagram of the cutting member 2 in one embodiment of the present invention. In these two figures, the cutting assembly 92 and the cutting member 2 have a tool mounting bracket 921 and a cutting blade mounting bracket 21 with similar shapes. Both have tool mounting grooves 9211 and mounting grooves 211 of similar size, and the cutting blades of the cutting assembly 92 and the cutting member 2 are located in the tool mounting grooves 9211 and mounting grooves 211, respectively.

[0075] When the height of both mounting slots is h, it is understandable that in the prior art, the cutting edge of the cutting tool 920 is formed by a smooth connection and splicing of a first arc-shaped cutting edge 9201 and a second arc-shaped cutting edge 9202. (Reference) Figure 1 As shown, the first arc-shaped cutting edge 9201 and the second arc-shaped cutting edge 9202 are spliced ​​together in the vertical direction. The spliced ​​cutting edge can be approximated as a straight cutting edge set in the vertical direction, and the length of the cutting edge is approximately h.

[0076] In this invention, the straight cutting edge 202 forms a certain angle with the vertical direction. The straight cutting edge 202 can be regarded as the hypotenuse of a right triangle with h as one leg. Therefore, it can be seen that the length of the straight cutting edge 202 is much greater than h, that is, greater than the length of the cutting edge of the cutting tool 920 in the prior art. When the tissue 4 to be cut slides on the straight cutting edge 202, the stroke of its interaction with the tissue 4 to be cut will be longer, which is more conducive to completing the cutting of the tissue 4 to be cut.

[0077] In particular, the thickness of the end effector is usually limited in practical applications, which limits the height h of the tool mounting groove 9211 and the mounting groove 211. Under the same height h, it is obvious that the straight cutting edge 202 in this invention can have a longer stroke and can be used to contact the tissue 4 to be cut, thus making it more advantageous for cutting.

[0078] Preferably, still refer to Figure 7 As shown in the figure, the acute angle formed by the linear cutting edge 202 and the movement direction of the cutting member 2 (that is, the linear cutting edge 202 and its own movement direction) is angle a in the figure, and the angle a is 35°~55°.

[0079] This configuration ensures that the angle between the pressure applied by the straight cutting edge 202 to the tissue 4 to be cut and the horizontal direction is between 35° and 55°. This makes it more advantageous for the straight cutting edge 202 to cut the tissue 4.

[0080] Furthermore, the cutting component 2 also includes a lower cutting edge 204 and a connecting cutting edge 203. The lower cutting edge 204 is arranged facing upward and extending along a direction parallel to the movement direction of the cutting component 2. The lower cutting edge 204 is smoothly connected to the lower end of the straight cutting edge 202 through the connecting cutting edge 203, and both the lower cutting edge 204 and the connecting cutting edge 203 are located on the side of the straight cutting edge 202 near the free end 101.

[0081] Understandably, the connecting edge 203 is also positioned toward the free end 101.

[0082] With this configuration, when the cutting component 2 cuts the tissue, as the cutting component 2 moves forward, the straight cutting edge 202 comes into contact with the tissue 4 to be cut. The tissue 4 to be cut is squeezed and slides to the upper part of the straight cutting edge 202 and is cut by the upper part of the straight cutting edge 202. When the tissue 4 to be cut is not cut by the upper part of the straight cutting edge 202, the tissue 4 to be cut will continue to slide down along the straight cutting edge 202 and then slide onto the connecting cutting edge 203. Therefore, it can be seen that the straight cutting edge 202 will perform a squeezing cut on the tissue 4 to be cut. Before being completely cut, the tissue 4 slides downwards. When the tissue 4 is at the lower part of the straight cutting edge 202 and the connecting cutting edge 203, it can generate relative movement with the lower part of the straight cutting edge 202 and the connecting cutting edge 203, resulting in a sliding cut. When the lower part of the straight cutting edge 202 and the connecting cutting edge 203 is magnified to a certain extent, it can be understood as serrated. During the sliding cut, a "saw" effect is produced, which can generate a large interaction force between the tissue 4 to be cut and the lower part of the straight cutting edge 202 and the connecting cutting edge 203, making it easier to cut and requiring less force. Generally speaking, the lower cutting edge 204 mainly serves as an auxiliary cutting tool to ensure that when cutting harder tissue 4, auxiliary cutting can be performed from the lower part of the tissue 4 to ensure the cutting effect.

[0083] Preferably, the connecting cutting edge 203 is arc-shaped. This design allows the tissue 4 to be cut more effectively when it slides from the lower part of the straight cutting edge 202 onto the connecting cutting edge 203.

[0084] Furthermore, the cutting member 2 includes an upper cutting edge 201, which is arranged facing downward and extending in a direction parallel to the extension of the cutting groove. The upper cutting edge 201 is smoothly connected to the upper end of the straight cutting edge 202 and is located on the side of the straight cutting edge 202 near the free end 101.

[0085] Generally speaking, when the cutting component 2 cuts tissue, the upper cutting edge 201 will first contact the tissue 4 to be cut, so that the upper end of the tissue 4 to be cut is cut off first.

[0086] Then turn Figure 4The best illustration is provided to describe the specific principles of the cutting process of the cutting component 2. In this invention, when the cutting component 2 cuts the tissue 4 to be cut, the upper cutting edge 201 first contacts the tissue 4 to be cut, causing the upper end of the tissue 4 to be cut to be severed first. As the cutting component 2 moves forward, the straight cutting edge 202 contacts the tissue 4 to be cut. If the upper end of the tissue 4 to be cut is not severed, it will be squeezed and slid to the upper part of the straight cutting edge 202 and continue to be cut by the upper part of the straight cutting edge 202. When the tissue 4 to be cut is not severed by the upper part of the straight cutting edge 202, the tissue 4 to be cut will continue to slide down along the straight cutting edge 202 and then slide onto the connecting cutting edge 203. Therefore, it can be seen that the upper cutting edge 201 usually cuts the upper part of the tissue 4 to be cut first, and the straight cutting edge 202 will perform a squeezing cut on the tissue 4 to be cut. Before it is cut off, the tissue 4 to be cut slides down. When the tissue 4 to be cut is on the lower part of the straight cutting edge 202 and the connecting cutting edge 203, it can generate relative movement with the lower part of the straight cutting edge 202 and the connecting cutting edge 203, which becomes a sliding cut. When the lower part of the straight cutting edge 202 and the connecting cutting edge 203 is magnified to a certain extent, it can be understood as serrated. When sliding down, a "saw" effect is produced, which can generate a large cutting force on the part of the tissue 4 to be cut that contacts the lower part of the straight cutting edge 202 and the connecting cutting edge 203, so it is easier to cut off and the cutting efficiency is improved.

[0087] Specifically, refer to Figure 4 In the enlarged view, the cutting edge of the cutting blade 20 can be divided into two functional zones: Zone I ① and Zone II ②. Zone I ① can first contact the tissue to be cut. When Zone I ① contacts the tissue 4 to be cut, the cutting edge of Zone I ① will compress the tissue 4. During the compression process, the elastic modulus of the tissue 4 to be cut will gradually decrease. When the elastic modulus of the tissue 4 to be cut decreases, its hardness increases.

[0088] Normally, within zone I ①, the elastic modulus of the tissue 4 to be cut undergoes a rapid transition from large to small. Because the elastic modulus decreases, the relative movement of the tissue 4 away from the cutting edge gradually diminishes during this process, making it easier to cut. However, some difficult-to-cut tissue 4 may still remain uncut by the cutting edge in zone I ①.

[0089] Next, the uncut tissue 4 slides to region II ②. Understandably, the elastic modulus of the tissue 4 in region II ② is definitely less than that when it is in region I ①, because the cutting edge in region I ① has already compressed the tissue. When the uncut tissue 4 slides to region II ②, the straight cutting edge 202 inclined towards the free end 101 will further compress this part of the tissue. Therefore, the elastic modulus of this part of the tissue becomes even smaller, its hardness usually becomes greater, and the relative movement between this part of the tissue and the cutting edge in region II ② is also smaller.

[0090] Understandably, when this part of the tissue to be cut 4 moves further relative to the cutting edge in zone II ②, the cutting edge in zone II ② can squeeze it while further cutting it, thus making it easier to cut off this part of the tissue to be cut 4 and ensuring the cutting effect.

[0091] Preferably, in this embodiment, the upper cutting edge 201, the straight cutting edge 202, the connecting cutting edge 203, and the lower cutting edge 204 are manufactured using a one-piece molding process, ensuring the structural integrity and strength of the entire cutting component. This one-piece molding design not only improves the durability of the cutting component but also makes the transition between the cutting edges more natural and smooth, thereby providing a smoother and more efficient cutting experience during surgery. Furthermore, the one-piece molding structure simplifies the manufacturing process and reduces production costs.

[0092] It should be noted that, as Figure 4 As shown, the upper cutting edge 201, the straight cutting edge 202, the connecting cutting edge 203 and the lower cutting edge 204 are made by an integral molding process, and generally form a "U" shaped structure with the opening facing the free end 101.

[0093] More specifically, refer to Figure 8 As shown, in this utility model, the cutting component 2 includes a cutting blade 20 and a cutting blade mounting bracket 21, with the cutting blade 20 being mounted on the cutting blade mounting bracket 21. The cutting blade 20 has an upper cutting edge 201, a straight cutting edge 202, a connecting cutting edge 203, and a lower cutting edge 204 as described above.

[0094] Furthermore, in this embodiment, reference is made to... Figure 3 For optimal display purposes, the cutting component 2 further includes a pusher rod 22, which is connected to the cutting blade mounting bracket 21. In this embodiment, the pusher rod 22 and the cutting blade mounting bracket 21 are connected by welding.

[0095] Furthermore, a mounting shaft 212 is carefully threaded through the cutting member 2, a design that cleverly connects the cutting member 2 to the jaw assembly 1. Both ends of the mounting shaft 212 extend laterally beyond the cutting member 2, and guide grooves are respectively provided on the sidewall of the feed groove 1111. Both ends of the mounting shaft 212 are stably embedded in the guide grooves on the sidewall of the feed groove 1111.

[0096] This sliding configuration not only ensures that the cutting component 2 can move smoothly and accurately along its length, but also improves the structural stability and operational flexibility of the entire end effector. The guide groove design further enhances the guiding nature of the cutting component 2 during movement, making the surgical operation more precise and controllable.

[0097] Specifically, the mounting shaft passes through the cutting blade mounting bracket 21, which is typically configured as an I-beam structure. This I-beam has an upper crossbeam, a lower crossbeam, and a connecting beam connecting the upper and lower crossbeams located on the upper and lower sides. Typically, the mounting shaft 212 passes through the lower crossbeam, thereby engaging with the side wall of the feed groove 1111.

[0098] Furthermore, the upper crossbeam has two sidewalls in a direction perpendicular to the axial direction of the nail chamber, and each of these two sidewalls is provided with a boss 213, which usually also serves as a limiting function.

[0099] In this embodiment, reference Figure 2 As described in 6, the first jaw member 11 typically also includes a pusher slider 112, which is disposed in the feed groove 1111 and can be pushed by the cutting blade mounting bracket 21.

[0100] Preferably, in this embodiment, the mounting shaft 212 is designed as a cylinder. This structural form not only provides good sliding performance but also ensures the stability and durability of the structure. The mounting shaft 212 is pivotally inserted into the guide groove, allowing the cutting component 2 to be flexibly adjusted at different angles to adapt to various surgical operation requirements. This design reduces the friction of the mounting shaft 212 within the guide groove while ensuring the accuracy and reliability of the cutting component 2 during operation.

[0101] In this embodiment, the jaw assembly 1 includes not only a first jaw member 11 but also a second jaw member 12. One end of the second jaw member 12 is pivotally connected to the end of the first jaw member 11 away from the free end 101, and the other end of the second jaw member 12 forms its free end. This connection method gives the jaw assembly greater flexibility and versatility.

[0102] Through a drive mechanism, at least one of the first jaw member 11 and the second jaw member 12 can pivot toward or away from the other. This design not only facilitates adjustment of the opening and closing degree of the jaw assembly to accommodate surgical sites of different sizes and shapes, but also makes surgical operations more precise and convenient.

[0103] Understandably, in this invention, the first jaw member 11 and the second jaw member 12 have a pivotally connected connection portion, and the free end 101 of the jaw assembly 1 is located on one side of the jaw assembly 1 relative to the connection portion.

[0104] In this embodiment, the second jaw member 12 is typically configured as an anvil, which is typically pivotally connected to the staple cartridge base 113 in the first jaw member 11, and the staple cartridge 111 is disposed on the staple cartridge base 113 and located between the anvil and the staple cartridge base 113.

[0105] Furthermore, the anvil is provided with a positioning groove that mates with the feed groove on the staple cartridge 111. Two bosses 213 on the upper crossbeam are located within the positioning groove and are slidably disposed on the two side walls of the positioning groove. Understandably, when the jaw assembly is closed, the cutting blade mounting bracket 21 defines the vertical position of the staple cartridge 111 and the anvil by the two bosses 213 on the upper side and the mounting shaft 212 on the lower side. Thus, in the closed state, the vertical position of the two is fixed, thereby enabling better clamping of the tissue 4 to be cut.

[0106] An embodiment of this utility model also provides a suturing instrument, including the end effector as described above.

[0107] In summary, the embodiments of this utility model achieve the following technical effects:

[0108] The combination of the upper cutting edge 201, the straight cutting edge 202, the connecting cutting edge 203, and the lower cutting edge 204 facilitates the cutting of the tissue to be cut and makes it less likely for the tissue to be cut to shift.

[0109] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0110] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0111] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0112] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An end effector for a stapling instrument comprising a jaw assembly and a cutting member, characterized by, The jaw assembly comprises a first jaw member provided with a tool travel groove, the jaw assembly having an openable and closable free end, the tool travel groove extending towards the free end, the cutting member comprising a straight blade edge movable along the extension direction of the tool travel groove, the straight blade edge being arranged in the tool travel groove towards the free end and having a cutting portion above the tool travel groove, the straight blade edge being arranged at an acute angle to the extension direction of the tool travel groove.

2. An end effector for a stapling instrument according to claim 1, wherein, The acute angle is 35°-55°.

3. An end effector for a stapling instrument according to claim 1, wherein, The cutting member further comprises a lower blade edge and a connecting blade edge, the lower blade edge extending upwards and along a direction parallel to the extension direction of the tool travel groove, the lower blade edge being smoothly connected to the lower end of the straight blade edge through the connecting blade edge, and the lower blade edge and the connecting blade edge being located on the side of the straight blade edge close to the free end.

4. An end effector for a stapling instrument according to claim 3, wherein, The connecting blade edge is arranged in a circular arc shape.

5. An end effector for a stapling instrument according to claim 3, wherein, The cutting member comprises an upper blade edge, the upper blade edge extending downwards and along a direction parallel to the extension direction of the tool travel groove, the upper blade edge being smoothly connected to the upper end of the straight blade edge and being located on the side of the straight blade edge close to the free end.

6. An end effector for a stapling instrument according to claim 5, wherein, The upper blade edge, the straight blade edge, the connecting blade edge and the lower blade edge are integrally formed.

7. An end effector for a stapling instrument according to claim 1, wherein, An installation shaft is arranged through the cutting member, the two ends of the installation shaft extending laterally out of the cutting member, a guide sliding groove is arranged on the groove side wall of the tool travel groove, and the two ends of the installation shaft are slidingly arranged in the guide sliding grooves.

8. An end effector for a stapling instrument according to claim 7, wherein, The installation shaft is arranged in a cylindrical shape, and the installation shaft is pivotally arranged in the guide sliding grooves.

9. An end effector for a stapling instrument according to claim 1, wherein, The jaw assembly further comprises a second jaw member, one end of the second jaw member being pivotally connected to the end of the first jaw member away from the free end, the other end of the second jaw member forming the free end thereof, and at least one of the first jaw member and the second jaw member being drivably pivotable towards or away from the other.

10. A stapling instrument characterized by, An end effector for a stapling instrument as claimed in any one of claims 1-9.

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