Jaw assembly for anastomat and anastomat

Abstract

The jaw assembly comprises a nail abutting seat and a nail bin base, one end of the nail abutting seat is connected with one end of the nail bin base in a pivoted mode, each side of the nail abutting seat and each side of the nail bin base in the lateral direction are correspondingly provided with at least one row of protruding parts, and the protruding parts are arranged on the nail abutting seat and the nail bin base in a pivoted mode. At least one of the nail abutting base and the nail bin base can be driven to pivot relative to the other one so that the jaw assembly can be closed, and each row of protruding parts on the nail bin base and the corresponding row of protruding parts on the nail abutting base can move oppositely so that tissue to be cut can be clamped. The problem that in the prior art, when cut tissue is thick or hard, the jaw assembly slides relative to the cut tissue, and therefore the positioning effect is affected is solved.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a jaw assembly for a stapler and the stapler. Background Art

[0002] As a commonly used instrument in minimally invasive surgery, staplers offer the advantage of being able to complete surgical procedures through smaller incisions, significantly shortening patients' postoperative recovery time and reducing the occurrence of complications. With the continuous advancement of endoscopic technology, a series of instruments suitable for endoscopic surgery have emerged. These instruments can precisely place distal actuators through the cannula of a trocar to the surgical site, thereby achieving tissue diagnosis or treatment.

[0003] However, the design of the stapler in the prior art still has some shortcomings. Although the stapler has raised features to enhance the mutual clamping effect with the anvil, this design does not provide sufficient anti-slip effect when the anvil is closed. When using the stapler to cut tissue, if the cut tissue is thick or hard, such as stomach or bronchial tissue, slippage is likely to occur. This may not only affect the accuracy of the operation, but also increase the risk of surgery, prolong the operation time, and even cause unnecessary harm to the patient.

[0004] Therefore, in view of the shortcomings of the existing staplers in terms of anti-slip effect and the tissue slippage problem that may be encountered during actual surgery, it is necessary to make further technical innovations and improvements. Utility Model Content

[0005] The purpose of the utility model is to provide a jaw assembly for a stapler and a stapler, so as to solve the problem in the prior art that when the cut tissue is thick or hard, the jaw assembly slips relative to the cut tissue, thereby affecting the positioning effect.

[0006] In order to achieve the above-mentioned purpose of the present invention, one embodiment of the present invention provides a jaw assembly for a stapler, which includes a nail holder and a nail magazine base, one end of the nail holder and one end of the nail magazine base are pivotally connected, and at least one row of protrusions are correspondingly provided on each side of the nail holder and the nail magazine base in the lateral direction, and at least one of the nail holder and the nail magazine base can be driven to pivot relative to the other to close the jaw assembly, and each row of protrusions on the nail magazine base can move toward the corresponding row of protrusions on the nail holder for clamping the tissue to be cut.

[0007] As a further improvement of the embodiment of the present invention, the anvil and the nail magazine base both have two sides in their lateral directions, and a row of protrusions are correspondingly provided on each side of the anvil and the nail magazine base. Each row of protrusions on the nail magazine base can be matched with a corresponding row of protrusions on the anvil, and a volume space for the tissue to be cut to expand is formed between the two rows of protrusions on the nail magazine base.

[0008] As a further improvement to the embodiment of the present invention, the two rows of raised portions on both sides of the anvil are arranged as serrated structures, and a row of raised portions on the nail magazine base corresponding to each row of serrated structures on the anvil is also arranged as a serrated structure, and the serrated structure matches the serrated structure on the anvil in shape, size and arrangement.

[0009] As a further improvement to the embodiment of the present invention, each tooth of the serrated structure on the nail holder has a first side wall and a second side wall arranged back to back, and the second side wall is arranged toward the end of the nail holder connected to the nail magazine base, and each tooth of the serrated structure on the nail magazine base has a third side wall and a fourth side wall arranged back to back, and the fourth side wall is arranged toward the end of the nail magazine base connected to the nail holder, wherein the first side wall and the third side wall are arranged at an acute angle to the axial direction of the jaw assembly, and the second side wall and the fourth side wall are arranged at a right angle or an obtuse angle to the axial direction.

[0010] As a further improvement of an embodiment of the present invention, the jaw assembly also includes a nail magazine arranged between the nail support and the nail magazine base, the nail magazine is arranged on the nail magazine base and is fixed relative to the nail magazine base, and the volume space has a portion located between the two rows of protrusions on the nail magazine and the nail magazine base.

[0011] As a further improvement of an embodiment of the present invention, the nail magazine base includes a base body and flanges formed on both sides of the base body in the lateral direction, the flanges are arranged on the side of the base body facing the nail support, the nail magazine is arranged in the space surrounded by the base body and the two flanges, and the protrusions located on both sides of the nail magazine base are respectively arranged on the end surfaces of the flanges on both sides.

[0012] As a further improvement of an embodiment of the present invention, the nail magazine base also includes a limiting structure arranged on the base body, and the limiting structure is arranged on a side of the base body facing the nail support and is used to limit the position of the nail magazine on the nail magazine base.

[0013] As a further improvement of the embodiment of the present utility model, a limiting groove for accommodating the limiting structure is provided on the nail magazine, and the limiting structure is clamped in the limiting groove.

[0014] As a further improvement of the embodiment of the present utility model, the limiting structure is configured as a boss structure, the nail magazine base has a connecting portion pivotally connected to the nail support, the boss structure has a first boss side wall arranged toward the connecting portion and a second boss side wall arranged away from the first boss side wall, the first boss side wall is arranged perpendicular to the base body, and the second boss side wall intersects with the axial direction of the base body at an acute angle.

[0015] An embodiment of the present invention further provides a stapler, which includes the jaw assembly as described above.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] When the jaw assembly is closed and clamps the tissue to be cut, each row of protrusions on the nail support is precisely matched with the corresponding row of protrusions on the nail magazine base to further clamp the tissue to be cut, thereby avoiding displacement of the jaw assembly and the clamped tissue to be cut during operation, which affects the positioning effect of the jaw assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a jaw assembly clamping tissue to be cut provided by one embodiment of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of the M in the middle;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure after removing the tissue to be cut;

[0021] Figure 4 for Figure 3 Schematic diagram of the structure after the jaw assembly is opened;

[0022] Figure 5 for Figure 3 Schematic diagram of the exploded structure of the middle jaw assembly;

[0023] Figure 6 for Figure 3 A top view of the jaw assembly with the anvil removed;

[0024] Figure 7 for Figure 5 Schematic diagram of the structure of the middle anvil;

[0025] Figure 8 for Figure 5 Schematic diagram of the structure of the center nail magazine base;

[0026] Figure 9for Figure 3 Schematic diagram of the cross-section structure in ;

[0027] Figure 10 A schematic structural diagram of a stapler provided in one embodiment of the present utility model.

[0028] The above description of the drawings includes the following reference numerals:

[0029] 100. Stapler;

[0030] 1. Jaw assembly;

[0031] 11. Anvil;

[0032] 111, raised portion;

[0033] 1111, first side wall;

[0034] 1112, second side wall;

[0035] 12. Nail magazine base;

[0036] 121, raised portion;

[0037] 1211, third side wall;

[0038] 1212, fourth side wall;

[0039] 122. Base body;

[0040] 123, Flanging;

[0041] 124. Boss structure;

[0042] 1241, first boss side wall;

[0043] 1242, second boss side wall;

[0044] 13. Nail warehouse;

[0045] 131, limit slot;

[0046] 21, 22, volume space;

[0047] 200. Tissue to be cut. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] 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 ordinary technicians in the technical field to which this application belongs.

[0050] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0051] like Figure 1-10 As shown, the present invention provides a jaw assembly 1 for a stapler and a stapler 100 .

[0052] Among them, the jaw assembly 1 for the stapler includes a nail seat 11 and a nail magazine base 12, one end of the nail seat 11 and one end of the nail magazine base 12 are pivotally connected, and at least one row of protrusions are correspondingly provided on each side of the nail seat 11 and the nail magazine base 12 in the lateral direction.

[0053] At least one of the anvil 11 and the staple magazine base 12 can be driven to pivot relative to the other to close the jaw assembly, and each row of protrusions 111 on the staple magazine base 11 moves toward the corresponding row of protrusions 121 on the anvil 12 to clamp the tissue 200 to be cut.

[0054] Specifically, the jaw assembly 1 mainly includes two core components: an anvil 11 and a nail magazine base 12. One end of the anvil 11 and one end of the nail magazine base 12 are flexibly pivotally connected through a pivot, so that the two can rotate relative to each other within a certain range.

[0055] At least one row of protrusions is correspondingly provided on each lateral side of the anvil 11 and the magazine base 12. That is, the protrusions 111 provided on each lateral side of the anvil 11 can be provided in one or more rows; and correspondingly, the protrusions 121 provided on each lateral side of the magazine base 12 should also be provided in one or more rows.

[0056] The raised portions 111 on the anvil 11 and the raised portions 121 on the magazine base 12 are arranged correspondingly. It can be understood that each row of raised portions 111 on the anvil 11 corresponds to a row of raised portions 121 on the magazine base 12, and each row of raised portions 121 on the magazine base 12 corresponds to a row of raised portions 111 on the anvil 11. These raised portions play a vital role in the working process of the jaw assembly.

[0057] More importantly, at least one of the anvil 11 and the cartridge base 12 is designed to be driven to pivot relative to the other. This ingenious design allows the jaw assembly 1 to close, and during the closing process, each row of protrusions 111 on the anvil 11 can move toward a corresponding row of protrusions 121 on the cartridge base 12 to clamp the tissue 200 to be cut.

[0058] With such arrangement, while the anvil 11 and the staple magazine base 12 are closed to clamp the tissue 200 to be cut, the raised portions on both sides of the anvil 11 and the staple magazine base 12 can move toward each other to further clamp the tissue 200 to be cut, thereby preventing the tissue 200 to be cut from escaping from the jaw assembly 1.

[0059] It should be noted that, in the present invention, the lateral direction is relative to the axial direction, and the lateral direction is usually defined as being perpendicular to the axial direction. Generally speaking, the lateral direction can also be referred to as the transverse direction.

[0060] Specifically, the anvil 11 and the magazine base 12 each have their own axial direction, and when the anvil 11 and the magazine base 12 are closed, the jaw assembly will close. In this state, the axial directions of the anvil 11 and the magazine base 12 are parallel to each other and also remain parallel to the axial direction of the jaw assembly.

[0061] Furthermore, in the present invention, the nail magazine base 12 can be kept stationary, thereby driving the nail anvil 11 to move toward or away from the nail magazine base 12; or, the nail anvil 11 can be kept stationary, thereby driving the nail magazine base 12 to move toward or away from the nail anvil 11; or, the nail anvil 11 and the nail magazine base 12 can be simultaneously moved relative to or toward each other. Of course, such a setting can improve the efficiency of closing and clamping.

[0062] In the present invention, there is no limitation on the setting method of the relative movement between the nail support 11 and the nail magazine base 12. The user can set it according to actual needs. Any solution that is the same or similar to the present embodiment is included in the protection scope of the present invention.

[0063] It should be noted that in the present invention, the staple cartridge base 12 primarily serves as a mounting base for the staple cartridge 13, while the anvil 11 primarily serves to force the staples in the staple cartridge 13 into contact with the anvil 11 under force, thereby forming a predetermined shape that meets specific requirements, thereby suturing the corresponding tissue 200 to be cut. In this embodiment, the tissue 200 to be cut may be, for example, stomach tissue, lung tissue, intestinal tissue, etc.

[0064] Preferably, in the present invention, the structures of the anvil 11 and the nail magazine base 12 are exquisite, and the anvil and the nail magazine base 12 respectively have two sides in their lateral directions.

[0065] Furthermore, a row of protrusions 111 is provided on each of the two sides in the lateral direction of the anvil 11, and a row of protrusions 121 is provided on each of the two sides in the lateral direction of the nail magazine base 12. Each row of protrusions 121 on the nail magazine base 12 can cooperate with a row of protrusions 111 on the anvil 11 to clamp the tissue 200 to be cut.

[0066] The provision of these raised portions not only enhances structural stability but also significantly improves functionality. In particular, the raised portion 111 on the staple cartridge base 11 and the raised portion 121 on the staple anvil 12 are designed to move toward or away from each other. This design not only ensures the coordinated clamping between the two but also significantly enhances the stability and reliability of the clamping of the tissue 200 to be cut.

[0067] It is worth mentioning that the reference Figure 6 As shown, a volume space 21 is cleverly formed between the raised portions 121 on both sides of the staple cartridge base 12. These volume spaces 21 provide ample expansion areas for the tissue 200 to be cut. When the tissue 200 to be cut is clamped, the tissue 200 to be cut can expand into the volume spaces 21, thereby preventing necrosis of the tissue 200 to be cut due to lack of expansion space during clamping, thereby preventing damage to the tissue 200 to be cut.

[0068] Furthermore, the two rows of raised portions 111 on either side of the anvil 11 are specifically designed as serrated structures to provide enhanced clamping force. Accordingly, the rows of raised portions 121 on the magazine base 12, corresponding to each row of serrated structures on the anvil 11, are also configured as serrated structures. The serrated structures on the anvil 11 and the magazine base 12 are consistent in shape, size, and arrangement, ensuring that they are each confined to the tissue 200 to be cut located therebetween when the jaws are closed.

[0069] This design not only enhances the stability of the clamped tissue to be cut, but also improves the precision and safety of the surgical operation. The close coordination of the sawtooth structure achieves a firm clamping of the tissue, providing a reliable guarantee for the surgical process.

[0070] In the present invention, the raised portion 111 on the nail support 11 and the raised portion 121 on the nail magazine base 12 can be set to a serrated structure as well as a wave-like structure, a honeycomb structure, irregular protrusions, etc. The operator can select the setting according to specific needs.

[0071] It should be noted that the jaw assembly 1 has a free end that can be opened and closed. In this embodiment, one end of the nail support 11 and one end of the nail magazine base 12 are pivotally connected. Therefore, the two have a pivot connection portion, and the free end of the jaw assembly 1 is located on the side of the jaw assembly 1 opposite to the pivot connection portion.

[0072] In this embodiment, further reference is made to Figure 1-2 As shown, each tooth of the serration structure on the anvil 11 has a first side wall 1111 and a second side wall 1112 disposed opposite to each other, and the second side wall 1112 is disposed toward the end of the anvil 11 pivotally connected to the staple cartridge base 12. It can be understood that in order to form the tooth, the first side wall 1111 and the second side wall 1112 intersect.

[0073] Furthermore, the angle formed between the first side wall 1111 and the axial direction of the jaw assembly 1 is Figure 2 As shown in a1, a1 is an acute angle; the angle between the second side wall 1112 and the axial direction is Figure 2 As shown in a2, the angle a2 is a right angle or an obtuse angle.

[0074] Preferably, the angle a2 is in the range of 90° to 120°. This configuration can better limit the first protrusion 111 on the tissue 200 to be cut during clamping, thereby preventing the two from deviating from each other.

[0075] Furthermore, in this embodiment, reference is still made to Figure 2 As best shown, the raised portion 121 on the nail magazine base 12 is usually symmetrically arranged with the raised portion 111 on the nail support 11.

[0076] Each tooth of the sawtooth structure on the magazine base 12 has a third side wall 1211 and a fourth side wall 1212 disposed opposite each other. The fourth side wall 1212 is disposed toward the end of the magazine base 12 pivotally connected to the anvil 11. In order to form a tooth, the third side wall 1211 and the fourth side wall 1212 intersect.

[0077] Furthermore, the third side wall 1211 is arranged at an acute angle to the axial direction of the jaw assembly 1. It can be understood that the degree of the angle formed by the intersection of the third side wall 1211 and the axial direction of the jaw assembly 1 can be equal to the degree of the angle a1; the fourth side wall 1212 is arranged at a right angle or an obtuse angle to the axial direction, and the degree of this angle can be equal to the degree of the angle a2.

[0078] With such an arrangement, the serrated structure on the anvil 11 and the serrated structure on the staple magazine base 12 both form a structure similar to a "barb". When the tissue 200 to be cut is clamped between the serrated structure on the anvil 11 and the serrated structure on the staple magazine base 12, it is easier to be locked to avoid escape relative to the jaw assembly 1.

[0079] Further preferably, in this embodiment, the number of serrations in each row of serrations on the nail support 11 is between 10 and 30, and correspondingly, the number of serrations in each row of serrations on the nail magazine base 12 is also between 10 and 30. With such an arrangement, when they cooperate to clamp the tissue 200 to be cut, a predetermined clamping force can be ensured, and no damage will be caused to the surface of the tissue 200 to be cut.

[0080] refer to Figure 3-6 As shown, in this embodiment, the design of the jaw assembly 1 also cleverly includes a nail magazine 13 located between the nail anvil 11 and the nail magazine base 12. The volume space 21 has a portion located between the nail magazine 13 and the two rows of protrusions 121 on the nail magazine base 12.

[0081] It can be understood that when the tissue 200 to be cut is clamped by the protrusion 111 on the nail holder 11 cooperating with the protrusion 121 on the nail magazine base 12, the tissue 200 to be cut can easily extend toward the volume space 21 located between the nail magazine 13 and the protrusion 121.

[0082] In the present invention, the staple cartridge 13 is mainly used to store staples for suturing the tissue 200 to be cut. The staple cartridge 13 is securely mounted on the staple cartridge base 12, and when the staple cartridge base 12 pivots relative to the staple support 11, the staple cartridge 13 remains fixed relative to the staple cartridge base 12 and does not move therewith. This design ensures the stability and accuracy of the staple cartridge 13 during surgery. As an equivalent embodiment of a mechanical structure, other fixing methods or structures may also be used to ensure a fixed relationship between the staple cartridge 13 and the staple cartridge base 12, such as by securely fixing the staple cartridge 13 to the staple cartridge base 12 with clips, screws, or other fasteners to achieve the same function and effect.

[0083] Further, refer to Figure 8-9As shown, the design of the staple cartridge base 12 includes a base body 122 and flanges 123 cleverly formed on both sides of the base body in the lateral direction. These flanges 123 are arranged on the side of the base body 122 facing the anvil 11 and extend toward the anvil 1. The flanges 123 and the base body 122 together enclose a space for accommodating the staple cartridge 13. The staple cartridge 13 is stably placed in this space enclosed by the base body 122 and the two flanges 123, ensuring its stability during surgery.

[0084] In addition, the raised portions 121 on both sides of the nail magazine base 12 are carefully arranged on the end faces of the flanges 123 on both sides. This design not only optimizes the structural layout, but also enhances the clamping effect when the raised portions 121 cooperate with the corresponding structures on the nail support 11.

[0085] As an equivalent embodiment of a mechanical structure, the shape and size of the flange 123 can be appropriately adjusted according to specific needs, as long as the stable installation of the nail magazine 13 and the effective clamping of the protrusion 121 can be ensured.

[0086] It should be noted that the volume space 221 between the protrusion 121 and the nail magazine 13 also includes the portion between the flange 123 and the nail magazine 13 .

[0087] Further references Figure 7 As shown, Figure 7 A schematic diagram of the anvil 11 from a certain angle is shown. As can be understood from this diagram, a volume space 22 is formed between the two rows of raised portions 111 on the anvil 11. The provision of the volume space 22 is also intended to provide space for the tissue 200 to be cut to expand when the raised portions 111 and the raised portions 121 cooperate to clamp the tissue 200 to be cut. When the tissue 200 is squeezed and cut, a portion of the tissue 200 to be cut can extend into the volume space 22, thereby preventing damage to the tissue 200 to be cut due to lack of expansion space.

[0088] Generally speaking, when the anvil 11 and the staple cartridge base 12 pivotally move toward each other and close, the volume space 21 and the volume space 22 are connected to each other.

[0089] In conjunction with the above, when the anvil 11 and the staple cartridge base 12 are closed to clamp the tissue to be cut, the volume space between the anvil 11 and the staple cartridge base includes a portion of the volume space 21 between the protrusion 121 and the staple cartridge 13, another portion of the volume space 21 between the flange 123 and the staple cartridge 13, and a volume space 22 between the two rows of protrusions 111 on the anvil 11. This arrangement provides the jaw assembly with sufficient volume space to meet the expansion space required for squeezing the tissue 200 to be cut, thereby preventing damage to the tissue 200 to be cut due to the inability to expand.

[0090] Furthermore, in this embodiment, the flange 123 is perpendicular to the base body 122. Of course, in this embodiment, the flange 123 is perpendicular to the base body 122, not limited to a strict 90-degree angle, but also encompasses a functionally equivalent vertical configuration. For example, the flange 123 can be connected to the base body 122 at a slightly tilted angle while still maintaining its primary function and connection stability, such as an angle between 85 and 95 degrees, to achieve a similar vertical support effect.

[0091] Furthermore, the design of the staple cartridge base 12 includes a carefully configured limiting structure, which is cleverly arranged on the side of the base body 122 facing the anvil 11. The main function of this limiting structure is to accurately limit the position of the staple cartridge 13 on the staple cartridge base 12, ensuring its stability and accuracy during use.

[0092] It is worth noting that this embodiment of the limiting structure is not the only one, and other mechanically equivalent methods can also be used to achieve the same function, such as through the design of different shapes, sizes or materials to achieve the same effect of limiting the position of the nail magazine.

[0093] Furthermore, the design of the staple cartridge 13 cleverly includes a retaining groove 131 for accommodating a retaining structure. This retaining groove 131 is precisely constructed to form a snap fit with the retaining structure on the staple cartridge base 12, thereby ensuring stable positioning and quick installation of the staple cartridge 13 on the staple cartridge base 12.

[0094] It is worth noting that the specific shape and size of the limiting groove 131 can be adjusted according to the different limiting structures, as long as the locking function of the limiting structure can be achieved. In addition, the matching method between the limiting groove 131 and the limiting structure is not unique, and other mechanically equivalent methods can also be used, such as using limiting grooves of different shapes or materials to achieve the same locking and limiting effect.

[0095] Further, refer to Figure 8-9As shown, the limiting structure is specifically set as a boss structure 124. The nail magazine base 12 has a connection portion pivotally connected to the nail support 11. The boss structure 124 includes a first boss side wall 1241 arranged toward the connection portion and a second boss side wall 1242 arranged opposite to the first boss side wall 1241. The first boss side wall 1241 maintains a vertical relationship with the base body 122, ensuring the stability and accuracy of the structure. The second boss side wall 1242 intersects with the axial direction of the base body 122 to form an acute angle, as shown in FIG. Figure 9 As shown in the middle corner b, this design not only provides the necessary elastic space for the limiting structure, but also allows the boss structure 124 to be more smoothly inserted into the limiting groove 131 of the staple cartridge 13, achieving a more stable connection. It is worth noting that this boss structure design is not unique, and other mechanical structures with similar functions can also be used to achieve the same limiting and fixing effects.

[0096] like Figure 10 As shown, an embodiment of the present invention further provides a stapler 100 , which includes the jaw assembly 1 as described above.

[0097] In summary, the embodiments of the present invention achieve the following technical effects:

[0098] 1) Each row of raised portions 111 on the anvil 11 cooperates with a corresponding row of raised portions 121 on the cartridge base 12. When the jaw assembly 1 closes and clamps the tissue 200 to be cut, the raised portions 111 on the anvil 11 and the raised portions 121 on the cartridge base 12 can further clamp the tissue 200 to be cut, thereby preventing relative displacement between the jaw assembly 1 and the clamped tissue 200 to be cut during operation, which would affect the clamping effect of the jaw assembly.

[0099] 2) When clamping the tissue 200 to be cut, the jaw assembly has a volume space 21 and a volume space 22 inside, thereby ensuring that there is sufficient volume space for the tissue 200 to be cut to expand when being clamped and squeezed, thereby avoiding damage to the tissue 200 to be cut due to failure to fully expand when the jaw assembly clamps the tissue 200 to be cut.

[0100] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0101] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0102] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A jaw assembly for a stapler, characterized in that: It includes a nail support and a nail magazine base, one end of the nail support is pivotally connected to one end of the nail magazine base, and at least one row of protrusions is correspondingly provided on each side of the nail support and the nail magazine base in the lateral direction. At least one of the nail support and the nail magazine base can be driven to pivot relative to the other to close the jaw assembly, and each row of protrusions on the nail magazine base can move toward the corresponding row of protrusions on the nail support for clamping the tissue to be cut.

2. The jaw assembly according to claim 1, wherein: The anvil and the nail magazine base respectively have two sides in their lateral directions, and a row of protrusions are correspondingly provided on each side of the anvil and the nail magazine base. Each row of protrusions on the nail magazine base can be matched with a corresponding row of protrusions on the anvil, and a volume space for the tissue to be cut to expand is formed between the two rows of protrusions on the nail magazine base.

3. The jaw assembly according to claim 2, wherein: The two rows of raised portions on both sides of the anvil are configured as sawtooth structures, and a row of raised portions on the nail magazine base corresponding to each row of sawtooth structures on the anvil is also configured as a sawtooth structure, and the sawtooth structure matches the sawtooth structure on the anvil in shape, size and arrangement.

4. The jaw assembly according to claim 3, wherein: Each tooth of the serrated structure on the nail holder has a first side wall and a second side wall arranged back to back, and the second side wall is arranged toward the end of the nail holder connected to the nail magazine base. Each tooth of the serrated structure on the nail magazine base has a third side wall and a fourth side wall arranged back to back, and the fourth side wall is arranged toward the end of the nail magazine base connected to the nail holder, wherein the first side wall and the third side wall are arranged at an acute angle to the axial direction of the jaw assembly, and the second side wall and the fourth side wall are arranged at a right angle or an obtuse angle to the axial direction.

5. The jaw assembly according to claim 2, wherein: The jaw assembly also includes a nail magazine arranged between the nail support and the nail magazine base, the nail magazine is arranged on the nail magazine base and is fixed relative to the nail magazine base, and the volume space has a portion between the two rows of protrusions on the nail magazine base and the nail magazine.

6. The jaw assembly according to claim 5, wherein: The nail magazine base includes a base body and flanges formed on both sides of the base body in the lateral direction. The flanges are arranged on the side of the base body facing the nail support. The nail magazine is arranged in the space surrounded by the base body and the two flanges. The protrusions located on both sides of the nail magazine base are respectively arranged on the end surfaces of the flanges on both sides.

7. The jaw assembly according to claim 6, wherein: The nail magazine base also includes a limiting structure arranged on the base body, and the limiting structure is arranged on a surface of the base body facing the nail support and is used to limit the position of the nail magazine on the nail magazine base.

8. The jaw assembly according to claim 7, wherein: The nail magazine is provided with a limiting groove for accommodating the limiting structure, and the limiting structure is clamped in the limiting groove.

9. The jaw assembly according to claim 8, wherein: The limiting structure is configured as a boss structure, the nail magazine base has a connecting portion pivotally connected to the nail support, the boss structure has a first boss side wall arranged toward the connecting portion and a second boss side wall arranged away from the first boss side wall, the first boss side wall is arranged perpendicular to the base body, and the second boss side wall intersects with the axial direction of the base body at an acute angle.

10. A stapler, characterized in that: Comprising the jaw assembly according to any one of claims 1-9.

Images