Staple cartridge assembly, stapler, and method of installing a stapler

Abstract

The application provides a staple cartridge assembly, a stapler and a mounting method of the stapler. The staple cartridge assembly comprises a staple cartridge having a length direction and a width direction, the staple cartridge comprising a first part and a second part oppositely arranged along the width direction, and the staple cartridge comprising a first end and a second end oppositely arranged along the length direction; wherein a knife slot is arranged between the first part and the second part, and the first part and the second part are connected at the first end and separated by the knife slot at the second end. The first part and the second part of the staple cartridge are connected at the first end and separated by the knife slot at the second end, and the cutting knife gradually fills the knife slot during assembly, so that the first part and the second part are separated from each other relative to the knife slot, thereby realizing stable mounting of the staple cartridge.

Description

Technical Field

[0001] This invention relates to the field of stapler technology, and more particularly to a stapler cartridge assembly, a stapler, and a method for installing the stapler. Background Technology

[0002] In the field of medical devices, especially surgical instruments, the assembly of the staple cartridge and the cutting blade is a crucial step. Traditional assembly methods typically involve assembling the staple cartridge and cutting blade first, and then inserting the whole assembly into the staple cartridge housing. However, this assembly method has encountered numerous challenges in practical operation.

[0003] First, the material and structural characteristics of the staple cartridge holder and the staple cartridge itself mean that they have almost no ability to deform elastically. This means that during assembly, the fit between the various components must be extremely precise; even slight deviations can lead to assembly difficulties or even damage to the components. The assembly difficulty increases significantly, especially when installing the staple cartridge and cutting blade as a single unit into the staple cartridge holder, due to limited space and the tight fit between the components.

[0004] Secondly, to address the assembly difficulties, a common approach is to design a large-clearance fit. However, while this reduces assembly difficulty, it significantly impacts the formation of the titanium screws. A large-clearance fit leads to instability in the relative position between the screw cartridge and the cutting blade, resulting in errors during screw formation and affecting surgical outcomes and patient recovery. Summary of the Invention

[0005] The purpose of this invention is to provide a staple cartridge assembly that is easy to install.

[0006] To achieve the above objectives, the present invention provides a staple cartridge assembly, comprising:

[0007] The staple cartridge has a length direction and a width direction. The staple cartridge includes a first part and a second part disposed opposite to each other in the width direction, and the staple cartridge includes a first end and a second end disposed opposite to each other in the length direction. A tool groove is provided between the first part and the second part, and the first part and the second part are connected at the first end and separated by the tool groove at the second end.

[0008] As a further improvement of the present invention, it also includes a pusher slider, which includes two pusher portions respectively provided for the first portion and the second portion. The first portion and the second portion are provided with a first engaging portion, and the two pusher portions are provided with a second engaging portion for engaging with the first engaging portion.

[0009] As a further improvement of the present invention, the pusher slider also includes a connecting plate connecting the two pusher parts. The connecting plate is provided with a snap-fit ​​groove for snapping with the cutting blade. The snap-fit ​​groove includes an opening near the second end and an abutment part disposed opposite to the opening.

[0010] As a further improvement of the present invention, it also includes a staple cartridge seat, which includes a bottom wall and a side wall, the bottom wall and the side wall forming a receiving space, in which the staple cartridge is received; and the staple cartridge is provided with a first latching part, and the side wall is provided with a second latching part for engaging with the first latching part.

[0011] As a further improvement of the present invention, the first part and the second part are provided with a connecting part at the second end. The connecting part is connected to the staple cartridge seat and the staple cartridge by a connector. Furthermore, a mounting position for installing the cutting blade is provided between the two connecting parts.

[0012] Another object of the present invention is to provide an anastomosis device comprising the above-described stapler cartridge assembly.

[0013] To achieve the above objectives, the present invention provides a stapler, including a cutting blade and the aforementioned staple cartridge assembly, wherein the cutting blade is configured to move along a cutting groove.

[0014] As a further improvement of the present invention, the staple cartridge assembly includes a staple pusher slider with a snap-fit ​​groove. The cutting blade includes a blade head and a blade bar connected to the blade head. The blade bar has a clearance groove corresponding to the position of the staple pusher slider. The blade head is at least partially located in the snap-fit ​​groove and abuts against the abutment portion.

[0015] As a further improvement of the present invention, the staple cartridge assembly includes a staple cartridge seat, and the stapler also includes an anvil seat that is connected to the staple cartridge seat. The anvil seat and the staple cartridge seat are rotatably connected at a second end, and at a first end, the anvil seat and the staple cartridge seat are configured to be close to or far from each other.

[0016] As a further improvement of the present invention, the cutting blade includes a blade head, which includes an upper beam and a lower beam disposed opposite to each other, and a cutting edge located between the upper beam and the lower beam, with the cutting edge facing the first end; the pin holder is provided with a first groove for the upper beam to slide, and the pin cartridge is provided with a second groove for the lower beam to slide.

[0017] Another object of the present invention is to provide an installation method for the above-mentioned stapler.

[0018] To achieve the above objectives, the present invention provides a method for installing a stapler, which is applied to the aforementioned stapler. The stapler includes a staple cartridge, a staple cartridge seat, a staple pusher slider, and a cutting blade. The installation method includes:

[0019] The staple cartridge and the staple pusher slider are engaged via the first and second engaging parts;

[0020] The staple cartridge and staple pusher slider are pre-installed in the receiving space of the staple cartridge seat;

[0021] Install the cutting blade into the feed groove of the staple cartridge;

[0022] The first and second parts are pressed by the cutting blade, causing the first and second parts to separate from each other relative to the cutting groove, and then engaged by the first latching part on the staple cartridge and the second latching part on the staple cartridge seat.

[0023] Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

[0024] In this invention, the first part and the second part of the staple cartridge are connected at the first end and separated by a cutting groove at the second end. During the assembly process, the cutting blade gradually fills the cutting groove, causing the first part and the second part to separate relative to the cutting groove, thereby achieving a stable installation of the staple cartridge. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the stapler conforming to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 Exploded view of the anastomosis device shown;

[0027] Figure 3 yes Figure 2 The diagram shows the structure of the staple cartridge;

[0028] Figure 4 yes Figure 3 A magnified view of the staple cartridge from another angle;

[0029] Figure 5 yes Figure 2 A magnified view of a portion of the staple cartridge holder shown;

[0030] Figure 6 yes Figure 3 A magnified view of the circled area;

[0031] Figure 7 yes Figure 2 The diagram shows the structure of the push pin slider.

[0032] Figure 8 yes Figure 2 A magnified view of the circled area;

[0033] Figure 9 yes Figure 1 The cross-sectional view of the anastomosis device shown. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0036] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] like Figures 1-2 As shown, the present invention provides a stapler 100, including a staple cartridge assembly 200, a cutting blade 300, and an anvil seat 400. The staple cartridge assembly 200 includes a staple cartridge 210, a staple pusher slider 220, and a staple cartridge seat 230. The staple cartridge seat 230 is connected to the anvil seat 400. The cutting blade 300 is connected between the anvil seat 400 and the staple cartridge seat 230, and can slide relative to the anvil seat 400 and the staple cartridge seat 230 along the length direction of the staple cartridge 210. The present invention first inserts the staple cartridge 210 into the staple cartridge seat 230, and then inserts the cutting blade 300, so that the staple cartridge 210 and the staple cartridge seat 230 are precisely assembled.

[0038] The staple cartridge 210 has a length direction and a width direction. For example... Figure 3 As shown, the staple cartridge 210 includes a first portion 2101 and a second portion 2102 disposed opposite to each other along the width direction, and the staple cartridge 210 includes a first end 2103 and a second end 2104 disposed opposite to each other along the length direction. A tool groove 2105 is provided between the first portion 2101 and the second portion 2102, and the first portion 2101 and the second portion 2102 are connected at the first end 2103 and separated at the second end 2104 by the tool groove 2105.

[0039] The pusher slider 220 includes two pusher portions 2201 respectively corresponding to the first portion 2101 and the second portion 2102. For example... Figure 4 and Figure 7 As shown, the first part 2101 and the second part 2102 are provided with a first engaging portion 2111, and the two pusher portions 2201 are provided with a second engaging portion 2211 for engaging with the first engaging portion 2111. In this embodiment, the first engaging portion 2111 and the second engaging portion 2211 are slots respectively provided on the staple cartridge 210 and the pusher slider 220. The first engaging portion 2111 and the second engaging portion 2211 engage with each other to connect the staple cartridge 210 and the pusher slider 220.

[0040] like Figure 5As shown, the staple cartridge holder 230 includes a bottom wall 2301 and a side wall 2302, which together form a receiving space 2303. The staple cartridge holder 230 has a U-shaped structure with one end open. After the staple cartridge 210 and the staple pusher slider 220 are connected, the staple cartridge 210 can be directly inserted into the receiving space 2303 from the top end of the U-shaped staple cartridge holder 230, or it can be pushed into the receiving space 2303 from the open end of the staple cartridge holder 230, thus achieving pre-installation of the staple cartridge 210 and the staple pusher slider 220.

[0041] like Figure 5 and Figure 6 As shown, the staple cartridge 210 is provided with a first latching part 2112, and the side wall 2302 is provided with a second latching part 2321 for engaging with the first latching part 2112. After the staple cartridge 210 is assembled into the staple cartridge seat 230, the first latching part 2112 and the second latching part 2321 are basically aligned. However, due to assembly gaps and other reasons, the first latching part 2112 may not be fully engaged with the second latching part 2321, resulting in the titanium staple groove (not shown) of the staple cartridge 210 not reaching the correct position. It is necessary to insert the cutting blade 300 into the cutting groove 2105 to fill the gap between the first part 2101 and the second part 2102, and press the first part 2101 and the second part 2102 against the side wall 2302 of the corresponding staple cartridge seat 230 to tightly engage the first latching part 2112 and the second latching part 2321. The first latching part 2112 and the second latching part 2321 enable the staple cartridge 210 and the staple cartridge seat 230 to be precisely connected, and restrict the up and down movement of the staple cartridge 210 in the staple cartridge seat 230, effectively enhancing the overall structural stability.

[0042] In other words, the method for installing the stapler 100 of this embodiment is as follows: First, the staple cartridge 210 and the staple pusher slider 220 are snapped together by the first snap-fit ​​part 2111 and the second snap-fit ​​part 2211. Then, the staple cartridge 210 and the staple pusher slider 220 are pre-installed in the receiving space 2303 of the staple cartridge seat 230. Then, the cutting blade 300 is installed in the cutting groove 2105 of the staple cartridge 210. The cutting blade 300 presses the first part 2101 and the second part 2102, causing the first part 2101 and the second part 2102 to separate from each other relative to the cutting groove 2105, and finally snapped together by the first snap-fit ​​part 2112 on the staple cartridge 210 and the second snap-fit ​​part 2321 on the staple cartridge seat 230.

[0043] After the staple cartridge 210 and staple cartridge seat 230 are connected and fixed, the cutting blade 300 is then placed in. Figure 6As shown, the first part 2101 and the second part 2102 of the staple cartridge 210 are provided with a connecting part 2106 at the second end 2104, and a mounting position 2107 for installing the cutting blade 300 is provided between the two connecting parts 2106. The cutting blade 300 is inserted into the feed groove 2105 from the mounting position 2107. The cutting blade 300 includes a blade head 310 and a blade shank 320 connected to the blade head 310. When installing the cutting blade 300, the blade shank 320 first enters the feed groove 2105 until the blade head 310 abuts against the pusher slider 220. In this embodiment, the blade head 310 and the blade shank 320 are separately provided. A protrusion 3202 is provided at the end of the blade shank 320, and the blade head 310 is provided with a corresponding groove. The protrusion 3202 engages with the groove to connect the blade head 310 and the blade shank 320. In other embodiments, the blade head 310 and the blade shank 320 can also be integrally provided.

[0044] Specifically, such as Figure 7 As shown, the pusher slider 220 includes a connecting plate 2202 that connects the two pusher parts 2201. By adding the connecting plate 2202, the two pusher parts 2201 are effectively connected together, forming a more stable and complete structure, which improves the overall rigidity and stability of the pusher slider 220, enabling it to better withstand various forces during use.

[0045] Furthermore, the connecting plate 2202 is provided with a locking groove 2203 for engaging with the cutting blade 300. The design of the locking groove 2203 allows the cutting blade 300 to be securely engaged with the pusher slider 220. This engagement method is not only simple and quick, but also provides sufficient stability to ensure that the cutting blade 300 will not loosen or fall off during operation. The locking groove 2203 provides a locking point for the cutting blade 300, which means that the pusher slider 220 is not only used to push the nail, but also works in conjunction with the cutting blade 300.

[0046] The locking groove 2203 includes an opening 2231 near the second end 2104 and an abutment portion 2232 disposed opposite to the opening 2231. The cutter bar 320 has a clearance groove 3201 corresponding to the position of the pusher slider 220. The cutter head 310 is at least partially located within the locking groove 2203 and abuts against the abutment portion 2232. After the cutting blade 300 is inserted into the feed groove 2105, the cutter head 310 enters the locking groove 2203 along the opening 2231 until it abuts against the abutment portion 2232. At this time, the clearance groove 3201 engages precisely with the abutment portion 2232 of the pusher slider 220, accurately positioning the cutting blade 300 and the pusher slider 220 together. The presence of the clearance groove 3201 ensures that the abutment portion 2232 of the pusher slider 220 is positioned precisely between the cutter head 310 and the cutter shank 320. This means that regardless of whether the cutting blade 300 moves forward or backward along its length, it will cause the pusher slider 220 to move along with it. The abutment portion 2232 further enhances the connection strength between the cutting blade 300 and the pusher slider 220, enabling them to work collaboratively as a whole. Even under high-speed or high-load operating conditions, the cutting blade 300 can maintain a stable posture and position, thereby reducing operational risks and the possibility of accidents.

[0047] like Figure 8 As shown, the cutter head 310 includes an upper beam 3101, a lower beam 3102 disposed opposite to each other, and a cutting edge 3103 located between the upper beam 3101 and the lower beam 3102.

[0048] like Figure 9 As shown, the staple cartridge seat 230 is provided with a second slide groove 2304 for the lower beam 3102 to slide. The second slide groove 2304 extends along the length direction and is located at the bottom of the staple cartridge seat 230. The staple cartridge 210 is located on the outside of the second slide groove 2304 relative to the bottom wall 2301. The cutting groove 2105 is aligned with the second slide groove 2304, and the cutting blade 300 slides along the cutting groove 2105. The second slide groove 2304 not only guides the cutting blade 300, but also limits its movement during cutting, preventing the blade head 310 from shaking and improving cutting stability.

[0049] The blade 3103 is located between the upper beam 3101 and the lower beam 3102, and the blade 3103 faces the first end 2103 and is inclined. It can be understood that in the initial uncut state, the blade head 310 is located at the second end 2104 of the staple cartridge seat 230, and the blade shank 320 extends from the blade head 310 toward the first end 2103 of the staple cartridge seat 230. The tissue is located on the side of the blade head 310 close to the blade shank 320. When the stapler 100 cuts, by pulling the blade shank 320, the blade 3103 on the blade head 310 is driven to cut the tissue.

[0050] After the cutting blade 300 and the staple cartridge assembly 200 are assembled, the staple anchor 400 is installed. The staple anchor 400 is connected to the staple cartridge seat 230.

[0051] At the first end 2103, the anvil 400 and the staple cartridge seat 230 can move closer to or further away from each other to control the closing or opening of the anvil 400 and the staple cartridge seat 230.

[0052] At the second end 2104, the anvil 400 and the staple cartridge seat 230 are rotatably connected. At the second end 2104, the anvil 400 extends into the staple cartridge seat 230. The anvil 400 can rotate relative to the staple cartridge seat 230 via the connector 240, allowing the anvil 400 and the staple cartridge seat 230 to close or open, facilitating tissue entry between the anvil 400 and the staple cartridge seat 230, and enabling cutting and anastomosis after tissue clamping. The connector 240 not only connects the anvil 400 and the staple cartridge seat 230, but also connects the connecting portion 2106 of the staple cartridge 210. This confines the staple cartridge 210 within the staple cartridge seat 230, ensuring that it does not shift along its length.

[0053] like Figure 9 As shown, the anvil seat 400 is provided with a first slide groove 410 for the upper beam 3101 to slide. The first slide groove 410 is aligned with the second slide groove 2304, and the two cooperate with each other to limit and guide the upper beam 3101 and lower beam 3102 of the cutting blade 300.

[0054] After the staple cartridge assembly 200, the cutting blade 300 and the staple anchor 400 are assembled, the cutting blade 300 can slide in the cutting groove 2105, while the staple pusher slider 220 pushes the staple outward, cooperating with the staple anchor 400 to achieve the fitting effect.

[0055] Specifically, the pusher slider 220 is located in front of the blade 3103 facing the blade shank 320, and it is situated on the outer wall of the second groove 2304, sliding on the outer wall of the second groove 2304. The staple cartridge 210 contains multiple pushers (not shown) connected to matching staples. The pusher slider 220 extends into the staple cartridge 210 and cooperates with the pushers to push the matching staples toward the abutment seat 400 for matching. Figure 7 As shown, the highest point of the pusher slider 220 is located at the pusher part 2201. The pusher part 2201 is provided with a forming surface 2212 and a pusher inclined surface 2213 connected to the forming surface 2212. The pusher is gradually pushed toward the nail seat 400 by the pusher inclined surface 2213. When the forming surface 2212 contacts the pusher, the matching nail is pushed out and formed for matching. The forming surface 2212 is the highest point of the pusher slider 220.

[0056] The anastomosis device 100 performs cutting and anastomosis specifically after the tissue enters between the anvil seat 400 and the staple cartridge seat 230. By pulling the blade 320, the blade head 310 slides, which in turn drives the staple pusher slider 220 to slide. The staple pusher slider 220 gradually pushes the staple pusher toward the anvil seat 400, so that the anastomosis staples pass through the tissue and are formed under the action of the anvil seat 400. Then the blade head 310 cuts the anastomosed tissue.

[0057] In summary, in this embodiment of the invention, the first part 2101 and the second part 2102 of the staple cartridge 210 are connected at the first end 2103 and separated at the second end 2104 by the cutting groove 2105. The staple cartridge 210 and the staple pusher slider 220 are installed first, and then the cutting blade 300 is inserted into the cutting groove 2105. During the assembly process, the cutting blade 300 gradually fills the cutting groove 2105, so that the first part 2101 and the second part 2102 are separated from each other relative to the cutting groove 2105. The first latching part 2112 of the staple cartridge 210 is engaged with the second latching part 2321 of the staple cartridge seat 230, ensuring that the staple cartridge 210 and the staple cartridge seat 230 are accurately assembled.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A staple cartridge assembly, characterized in that, include: A staple cartridge has a length direction and a width direction. The staple cartridge includes a first part and a second part disposed opposite to each other along the width direction, and the staple cartridge includes a first end and a second end disposed opposite to each other along the length direction. A tool groove is provided between the first part and the second part, and the first part and the second part are connected at the first end and separated by the tool groove at the second end. The pusher slider includes two pusher parts respectively corresponding to the first part and the second part, and a connecting plate connecting the two pusher parts. The connecting plate is provided with a snap-fit ​​groove for snapping with a cutting blade. The snap-fit ​​groove includes an opening near the second end and an abutment part disposed opposite to the opening. The cutting blade includes a blade head and a blade shank connected to the blade head. The blade shank has a clearance groove corresponding to the position of the push pin slider. The blade head is at least partially located in the locking groove and abuts against the abutting part. The clearance groove and the abutting part are locked together to position the cutting blade and the push pin slider together.

2. The staple cartridge assembly according to claim 1, characterized in that, The first part and the second part are provided with a first snap-fit ​​part, and the two push pin parts are provided with a second snap-fit ​​part for snapping with the first snap-fit ​​part.

3. The staple cartridge assembly according to any one of claims 1 to 2, characterized in that, It also includes a staple cartridge holder, which includes a bottom wall and a side wall, the bottom wall and the side wall forming a receiving space, in which the staple cartridge is received; and the staple cartridge is provided with a first latching part, and the side wall is provided with a second latching part for engaging with the first latching part.

4. The staple cartridge assembly according to claim 3, characterized in that, The first part and the second part are provided with a connecting part at the second end. The connecting part is connected to the staple cartridge seat and the staple cartridge by a connector. Furthermore, a mounting position for installing a cutting blade is provided between the two connecting parts.

5. A stapler, characterized in that, Includes the staple cartridge assembly as described in any one of claims 1 to 4, wherein the cutting blade is configured to move along the cutting groove.

6. The stapler according to claim 5, characterized in that, The staple cartridge assembly includes a staple cartridge seat, and the stapler further includes an anvil that mates with the staple cartridge seat. The anvil and the staple cartridge seat are rotatably connected at the second end, and at the first end, the anvil and the staple cartridge seat are configured to move closer to or further away from each other.

7. The stapler according to claim 6, characterized in that, The cutting blade includes a blade head, which includes an upper beam and a lower beam disposed opposite to each other, and a cutting edge located between the upper beam and the lower beam, the cutting edge being disposed towards the first end; the pin holder is provided with a first sliding groove for the upper beam to slide, and the pin cartridge holder is provided with a second sliding groove for the lower beam to slide.

8. A method for installing a stapler, characterized in that, The stapler according to any one of claims 5 to 7, the stapler comprising a staple cartridge, a staple cartridge seat, a staple pusher slider, and a cutting blade, the installation method comprising: The staple cartridge and the staple pusher slider are engaged by the first and second engaging parts; The staple cartridge and the staple pusher slider are pre-installed in the receiving space of the staple cartridge seat; The cutting blade is installed in the feed groove of the staple cartridge; The first part and the second part are pressed by the cutting blade, so that the first part and the second part are separated from each other relative to the cutting groove, and are engaged by the first latching part on the staple cartridge and the second latching part on the staple cartridge seat.

Images