Cutting assembly and anastomat

Abstract

The utility model discloses a cutting assembly, which is applied to an endoscope anastomat, a percussion sleeve (208) and a cutting knife (211), and is characterized in that the percussion sleeve (208) is provided with a positioning groove (2082), the cutting knife (211) comprises a plurality of blades with unequal lengths, the blade on the outer side of the cutting knife (211) is shorter than the blade in the middle of the cutting knife (211), and the positioning groove (2082) is arranged in the positioning groove (2082). A plurality of blades of the cutting knife (211) are inserted into the positioning grooves (2082), and when the cutting knife (211) is bent, the blades on the outer side are subjected to receding treatment in the positioning grooves (2082). The utility model solves the technical problem that the bending function of the anastomat in the prior art can be smoothly realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a cutting assembly and an anastomosis device. Background Art

[0002] In recent years, laparoscopic staplers have flourished and occupy an important position in minimally invasive surgery. The cutting assembly is an indispensable and important component of the stapler. If the cutting assembly is not designed reasonably, it will seriously affect the bending function of the stapler. The opening angle of the stapler device in the existing technology cannot be effectively controlled, which also has a certain impact on the bending function.

[0003] How to smoothly implement the bending function of the stapler in the prior art through a new design of the cutting assembly is a technical problem that urgently needs to be solved. Utility Model Content

[0004] The technical problem to be solved by the present invention is to solve the technical problem in the prior art of how to make the nail magazine device bend more smoothly by using a cutting assembly.

[0005] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] A cutting assembly, used in a laparoscopic stapler, comprises a firing sleeve (208) and a cutting knife (211), wherein the firing sleeve (208) is provided with a positioning groove (2082), and the cutting knife (211) comprises a plurality of blades of unequal lengths, wherein the outer blades of the cutting knife (211) are shorter than the middle blade of the cutting knife (211), and the plurality of blades of the cutting knife (211) are inserted into the positioning groove (2082). When the cutting knife (211) is bent, the outer blades make way in the positioning groove (2082).

[0007] Furthermore, the cutting knife (211) includes two outer cutting blades (2112) on the outside and two inner cutting blades (2111) in the middle.

[0008] Furthermore, the two outer cutting blades (2112) are respectively provided with a first locking end (21111), and the two inner cutting blades (2111) are respectively provided with a second locking end (21121), and the locking piece of the second locking end (21121) inserted into the positioning groove (2082) is shorter than the locking piece of the first locking end (21111) inserted into the positioning groove (2082).

[0009] Furthermore, the laparoscopic stapler is provided with a transmission base (301), and a travel groove (3014) for the cutting knife (211) is provided on the transmission base (301), and the cutting knife (211) is limited in the travel groove (3014) to move axially.

[0010] Furthermore, it also includes a transfer tube (213) and a nail magazine device, the transfer tube (213) is sleeved on the nail magazine device, the cutting knife (211) passes through the transfer tube (213) and slides in the nail magazine device, the nail magazine device includes a nail support (402) and a nail magazine base (401), and the two ends of the side wall of the nail support (402) are respectively provided with a limiting column (4021), and the nail magazine base (401) is correspondingly provided with a limiting track (4014), so that the nail support (402) and the nail magazine base (401) are opened at a certain angle.

[0011] Furthermore, the limiting track (4014) is sloped, and the slope angle is in the range of 10°-20°.

[0012] Furthermore, the slope angle of the limiting track (4014) is 15°.

[0013] Furthermore, a limiting protrusion (4022) is provided at the proximal end of the anvil (402), and a pressing piece (2132) is correspondingly provided on the side wall of the transfer tube (213). When the anvil (402) and the nail magazine base (401) are opened at an angle, the pressing piece (2132) presses against the limiting protrusion (4022) to prevent the opening angle from being too large.

[0014] Furthermore, the nail magazine device also includes a nail magazine (403), which is installed inside the nail magazine base (401) and adopts a snap-on connection. The nail magazine base (401) and the nail magazine (403) can be separated by pressing hard.

[0015] A stapler comprises any one of the cutting components described above.

[0016] After adopting such a design, the utility model has at least the following advantages:

[0017] (1) The structure of the present invention is stable, making the nail magazine device bend more smoothly.

[0018] (2) The utility model has a simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a structural diagram of the anvil 402 of the present invention;

[0021] Figure 2This is a structural diagram of the nail magazine base 401 of the present invention;

[0022] Figure 3 It is a schematic diagram of the position of the travel groove 3014 of the utility model;

[0023] Figure 4 It is a schematic structural diagram of the cutting knife 211 of the present invention;

[0024] Figure 5 This is a schematic structural diagram of the cutting blade of the utility model;

[0025] Figure 6 This is a schematic structural diagram of the nail magazine 403 of the present invention;

[0026] Figure 7 This is a schematic structural diagram of the positioning groove 2082 of the present utility model;

[0027] Figure 8 This is a diagram showing the installation position of the cutting knife 211 of the present invention;

[0028] Figure 9 This is a schematic structural diagram of the cutting knife 211 of the present invention in the travel groove 3014;

[0029] Figure 10 It is a schematic structural diagram of the connecting piece 212 of the present invention;

[0030] Figure 11 This is a schematic structural diagram of the transfer tube 213 of the present invention;

[0031] Reference numerals,

[0032] Adapter tube 213, cutting knife 211, inner cutting blade 2111, outer cutting blade 2112, cutting head 2113, first locking end 21111, first limiting boss 21112, second locking end 21121, second limiting boss 21122, cutting blade 21131, transmission tube 205, firing sleeve 208, positioning slot 2082, transmission base 301, travel slot 3014, magazine base 401, anvil 402, magazine 403, limiting post 4021, limiting protrusion 4022, side wall end 4023, positioning hole 4011, second side mounting hole 4012, second upper mounting hole 4013, limiting rail 4014, pressing piece 2132, hole 2131, connecting piece 212, positioning post 2121; DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In this document, “upper”, “lower”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0035] The end of each component closer to the operator is defined as the proximal end, and the end farther from the operator is defined as the distal end. The expressions proximal end and distal end are only used to simplify and clarify the description and should not be construed as any limitation to the present invention.

[0036] like Figure 1-11 As shown, an embodiment of the present invention provides a cutting assembly, which is used in a laparoscopic stapler, including an adapter tube 213, a staple magazine device and a cutting knife 211. The adapter tube 213 is sleeved on the staple magazine device, and the cutting knife 211 slides in the staple magazine device through the adapter tube 213. The staple magazine device includes a nail support 402 and a nail magazine base 401. The two ends of the side wall of the nail support 402 are respectively provided with limiting columns 4021, and the nail magazine base 401 is correspondingly provided with a limiting rail 4014. The limiting columns 4021 of the nail support 402 can slide on the limiting rail 4014 corresponding to the nail magazine base 401, so that the nail support 402 and the nail magazine base 401 are opened at a certain angle.

[0037] Here, in order to make the opening angle of the nail support 402 and the nail magazine base 401 smoother, the limiting track 4014 adopts a landslide structure design; the limiting track 4014 is a slope type, and the slope angle cannot be too large or too small. If it is too large, the structure will be unstable, and if it is too small, the tissue cannot be effectively clamped. After countless experiments, the inventor concluded that the slope angle is in the range of 10°-20°, and the preferred slope angle is about 15°.

[0038] Specifically, in the initial state, the limiting column 4021 is located at the bottom of the limiting track 4014, and the nail support 402 and the nail magazine base 401 are in a fully open state. When the nail support 402 and the nail magazine base 401 close the angle as needed, the limiting column 4021 slides upward along the limiting track 4014. When it slides to the end of the limiting track 4014, the angle between the nail support 402 and the nail magazine base 401 is completely closed.

[0039] The proximal end of the nail support 402 is also provided with a limiting protrusion 4022, and a corresponding pressing piece 2132 is provided on the side wall of the transfer tube 213. When the transfer tube 213 is pulled toward the proximal end, the transfer tube 213 leaves the end of the side wall of the nail support 402, and the transfer tube 213 is continued to be pulled toward the proximal end, so that the pressing piece 2132 leaves the limiting protrusion 4022, and the limiting column 4021 slides downward along the limiting track 4014. The nail support 402 and the nail magazine base 401 open at an angle, and the limiting protrusion 4022 is pressed by the pressing piece 2132, thereby limiting the limiting protrusion 4022 on the nail support 402, so that the opening angle cannot be too large, thereby controlling the opening angle of the nail support 402 and the nail magazine base 401. Because the design size of the pressing piece 2132 is directly related to the opening angle, within the structural design range, the pressing piece 2132 cannot be bent downward too much to avoid affecting the opening angle.

[0040] Push the transfer tube 213 toward the distal end, and the transfer tube 213 abuts against the end 4023 of the side wall of the nail holder 402. Continue to push the transfer tube 213 toward the distal end, so that the pressing piece 2132 abuts against the limiting protrusion 4022, and the limiting column 4021 slides upward along the limiting track 4014, and the nail holder 402 and the nail magazine base 401 are closed.

[0041] Here, the pressing piece 2132 is designed as an inclined slope type structure.

[0042] The nail magazine base 401 is provided with a positioning hole 4011, and the distal end of the bending device is inserted into the positioning hole 4011 and connected to the nail magazine base 401;

[0043] The cutting knife 211 includes an inner cutting blade 2111, an outer cutting blade 2112, and a cutting head 2113, wherein one end of the inner cutting blade 2111 is provided with a first locking end 21111 and a first limiting boss 21112; one end of the outer cutting blade 2112 is provided with a second locking end 21121 and a second limiting boss 21122; the cutting head 2113 is provided with a cutting blade 21131.

[0044] The cutting knife 211 of the present invention is a multi-blade type and has blades of unequal lengths. The length of the inner cutting blade 2111 is longer than the length of the outer cutting blade 2112.

[0045] Preferably, the cutting knife 211 includes four blades, two inner cutting blades 2111 and two outer cutting blades 2112 . The two inner cutting blades 2111 are adjacent to each other and are surrounded by the two outer cutting blades 2112 .

[0046] The stapler including the cutting assembly of the present invention is provided with a transmission base 301. The transmission base 301 is provided with a travel groove 3014 corresponding to the cutting blade 211. The cutting blade 211 is limited in the travel groove 3014 to move axially.

[0047] The narrow cutting blade travel groove 3014 designed in this embodiment can prevent the cutting blade 211 from being deformed due to excessive resistance to the inner blade 2111 and the outer blade 2112 .

[0048] The transmission tube 205 in the embodiment of the present invention is sleeved on the transmission base 301, and the first limiting boss 21112 of the inner cutting blade 2111 of the cutting knife 211 and the second limiting boss 21122 of the outer cutting blade 2112 are pressed against the inner wall of the transmission tube 205;

[0049] The cutting assembly also includes a firing sleeve 208, which is provided with a positioning groove 2082. The first locking end 21111 of the inner cutting blade 2111 of the cutting knife 211 and the second locking end 21121 of the outer cutting blade 2112 are inserted into the positioning groove 2082. The locking ends 21121 of the two outer cutting blades 2112 on the outside of the cutting blade 211 are inserted into the positioning groove 2082, and the locking pieces of the positioning groove 2082 are shorter than those of the inner cutting blade 2111. When bending left or right, the cutting knife will have an inclination angle, and the inclination angle of the outer cutting blade is larger. When the cutting knife 211 is bent, the outer cutting blade 2112 makes way in the positioning groove 2082. The structure designed by the inventor is that the outer blade is shorter than the inner blade, which makes bending smoother.

[0050] In the embodiment of the present invention, the first limiting boss 21112 and the second limiting boss 21122 of the cutting blade 211 are pressed against the inner wall of the transmission tube 205. The first locking end 21111 and the second locking end 21121 at the lower end of the cutting blade 211 are respectively fixed to the firing sleeve 208, thereby limiting the upper and lower positions of the cutting blade 211. In the embodiment of the present invention, the transmission base 301 is sleeved on the firing sleeve 208. Specifically, the rod portion of the firing sleeve 208 having the positioning groove 2082 is inserted into the inner cavity of the transmission base 301.

[0051] The nail magazine device also includes a nail magazine 403, which is installed inside the nail magazine base 401 and adopts a snap-on connection. The nail magazine base 401 and the nail magazine 403 can be separated by pressing hard.

[0052] The annular positioning protrusion of the bending device is inserted into the positioning hole 4011 of the nail magazine base 401. There are side mounting holes and upper mounting holes on the bending device, and the nail magazine base 401 is correspondingly provided with side mounting holes 4012 and upper mounting holes 4013. The fixing pins are respectively inserted into the aligned mounting holes to completely lock one end of the bending device and the nail magazine base 401.

[0053] The nail anvil 402 cooperates with the limiting track 4014 of the nail magazine base 401 through the left and right limiting columns 4021, so that the nail anvil 402 moves within the limiting track 4014 of the nail magazine base 401.

[0054] The adapter tube 213 is installed on the assembled nail magazine base 401, nail support 402, and nail magazine 403. The front end of the transmission tube has a hole, and the adapter tube 213 has a hole 2131, which is connected through the positioning column 2121 of the connecting piece 212.

[0055] When the bending device performs a bending motion, the transfer tube 213 can achieve synchronous bending with the nail magazine device through the active connection of the connecting piece 212.

[0056] An embodiment of the present utility model discloses a stapler, comprising a cutting assembly as shown in any of the above embodiments.

[0057] After adopting such a design, the utility model has at least the following advantages:

[0058] (1) The structure of the present invention is stable, making the nail magazine device bend more smoothly.

[0059] (2) The utility model has a simple structure, good effect, low cost and easy process implementation.

[0060] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the utility model disclosed in the specification and examples. This application is intended to cover any variations, uses, or adaptations of the present invention that adhere to the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered merely as exemplary; the true scope and spirit of the present invention are indicated by the following claims.

[0061] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A cutting assembly, used in a laparoscopic stapler, comprising a firing sleeve (208) and a cutting knife (211), characterized in that: The firing sleeve (208) is provided with a positioning groove (2082), and the cutting knife (211) includes multiple blades of unequal lengths. The outer blades of the cutting knife (211) are shorter than the middle blades of the cutting knife (211). The multiple blades of the cutting knife (211) are inserted into the positioning groove (2082). When the cutting knife (211) is bent, the outer blades make way in the positioning groove (2082).

2. The cutting assembly according to claim 1, characterized in that The cutting knife (211) comprises two outer cutting blades (2112) on the outside and two inner cutting blades (2111) in the middle.

3. The cutting assembly according to claim 2, characterized in that The two outer cutting blades (2112) are respectively provided with a first locking end (21111), and the two inner cutting blades (2111) are respectively provided with a second locking end (21121), and the locking piece of the second locking end (21121) inserted into the positioning groove (2082) is shorter than the locking piece of the first locking end (21111) inserted into the positioning groove (2082).

4. The cutting assembly according to claim 3, characterized in that The laparoscopic stapler is provided with a transmission base (301), and a travel groove (3014) for the cutting knife (211) is provided on the transmission base (301), and the cutting knife (211) is limited in the travel groove (3014) to move axially.

5. The cutting assembly according to claim 4, characterized in that The invention also includes a transfer tube (213) and a nail magazine device, wherein the transfer tube (213) is sleeved on the nail magazine device, and the cutting knife (211) passes through the transfer tube (213) and slides in the nail magazine device. The nail magazine device includes a nail anvil (402) and a nail magazine base (401), and the two ends of the side wall of the nail anvil (402) are respectively provided with a limiting column (4021), and the nail magazine base (401) is correspondingly provided with a limiting track (4014), so that the nail anvil (402) and the nail magazine base (401) are opened at a certain angle.

6. The cutting assembly according to claim 5, characterized in that The limiting track (4014) is sloped, and the slope angle is within the range of 10°-20°.

7. The cutting assembly according to claim 6, characterized in that The slope angle of the limiting track (4014) is 15°.

8. The cutting assembly according to claim 7, characterized in that A limiting protrusion (4022) is provided at the proximal end of the anvil (402), and a pressing piece (2132) is correspondingly provided on the side wall of the transfer tube (213). When the anvil (402) and the nail magazine base (401) are opened at an angle, the pressing piece (2132) presses against the limiting protrusion (4022) to prevent the opening angle from being too large.

9. The cutting assembly according to claim 8, characterized in that The nail magazine device further comprises a nail magazine (403), which is installed inside the nail magazine base (401) and is connected in a snap-fit manner. The nail magazine base (401) and the nail magazine (403) can be separated by pressing hard.

10. A stapler, characterized in that: Comprising a cutting assembly as described in any one of claims 1-9.

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