Cutting knife mechanism and anastomat with same

Abstract

The invention discloses a cutting knife mechanism and an anastomat with the cutting knife mechanism, a cutting knife assembly comprises a nail bin, a knife groove and a plurality of sliding grooves, the knife groove extends in the length direction, the sliding grooves are formed in the two sides of the knife groove, and a cutting knife limiting protrusion is arranged at the near end of the nail bin; the cutting knife comprises a blade part which is arranged in the knife groove in a sliding manner, a lap joint bulge which is arranged at the far end of the cutting knife, a safety release part which is arranged at the near end of the cutting knife and is matched with the knife pushing plate, a supporting part which is arranged on the cutting knife and is matched with the nail bin, and a reset bulge which is arranged on the supporting part; the nail pushing sliding block is in sliding fit with the nail bin and comprises a supporting rib matched with the cutter groove, a plurality of driving ribs arranged on the two sides of the supporting rib and matched with the sliding groove, and a lap joint platform arranged at the near end of the nail pushing sliding block and matched with the lap joint protrusion. The nail bin bracket is arranged outside the nail bin and used for limiting the cutting knife and the nail pushing sliding block on the nail bin. According to the cutting knife mechanism and the anastomat with the cutting knife mechanism, the cutting knife is convenient to disassemble.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a cutting knife mechanism and an anastomosis device having the same. Background Art

[0002] The electric laparoscopic cutting stapler relies on the internal cutting knife to achieve the severing effect on the tissue, and the sharpness of the cutting knife edge determines the anastomosis quality. The electric laparoscopic cutting stapler currently launched by Johnson & Johnson needs to use the internal cutting knife multiple times in the same operation. As the number of cutting times increases, the sharpness of the cutting knife edge will also decrease.

[0003] Chinese patent CN118902523A discloses a disposable cutting knife assembly that can be replaced with the nail magazine, which can effectively solve the above problems. However, the cutting knife assembly in the patent consists of a cutting knife, a buckle, and a knife holder. The cutting knife is mainly used to cut tissue, the buckle is mainly used to connect the pusher plate, and the knife holder is mainly used to restrict the movement of the cutting knife assembly in the nail magazine. In actual production, the above three parts need to be welded together. During the operation, the failure of any part of the cutting knife assembly in the above scheme, or the failure of the welding of the three parts, may cause the operation to fail. Summary of the invention

[0004] Based on the above problems, the object of the present invention is to provide a cutting knife mechanism and a stapler having the same, wherein the cutting knife assembly is a detachable structure to facilitate the replacement of the cutting knife.

[0005] In order to overcome the deficiencies of the prior art, one of the technical solutions provided by the present invention is:

[0006] The cutting knife mechanism comprises a nail magazine seat assembly, a nail support seat hinged to the nail magazine seat assembly, a cutting knife assembly detachably arranged in the nail magazine seat assembly, and a push knife plate matched with the cutting knife assembly, wherein the cutting knife assembly comprises:

[0007] A nail magazine, comprising a knife groove extending in the length direction and a plurality of sliding grooves arranged on both sides of the knife groove, and a cutting knife limiting protrusion is provided at the proximal end of the nail magazine;

[0008] The cutting knife comprises a blade portion slidably arranged in the knife groove, a lap protrusion arranged at the distal end of the cutting knife, a safety release portion arranged at the proximal end of the cutting knife and cooperating with the knife push plate, a support portion arranged on the cutting knife and cooperating with the nail magazine, and a reset protrusion arranged on the support portion, wherein the support portion cooperates with the cutting knife limiting protrusion to limit the cutting knife in the nail magazine;

[0009] A nail-pushing slider, which is slidably matched with the nail magazine, comprises a supporting rib matched with the knife groove, a plurality of driving ribs arranged on both sides of the supporting rib and matched with the sliding groove, and a lap platform arranged at the proximal end of the nail-pushing slider and matched with the lap protrusion;

[0010] A nail magazine bracket is arranged outside the nail magazine and is used to limit the cutting knife and the nail pushing slider on the nail magazine.

[0011] In one of the embodiments, slider limiting protrusions are respectively provided on both sides of the knife groove, and limiting grooves cooperating with the slider limiting protrusions are respectively provided on both sides of the support rib.

[0012] In one of the embodiments, the slider limiting protrusion is a cylindrical structure.

[0013] In one of the embodiments, a accommodating groove for inserting the cutting knife is provided at the proximal end of the nail-pushing slider.

[0014] In one of the embodiments, a safety release protrusion cooperating with the safety release portion and a cutting knife reset hook cooperating with the reset protrusion are provided at the distal end of the blade push plate.

[0015] In one embodiment, a first groove for partially inserting the cutting knife is formed between the cutting knife reset hook and the safety release protrusion, and a second groove for partially inserting the cutting knife is formed between the safety release protrusion and the body of the pushing knife plate.

[0016] In one embodiment, the proximal end of the cutting knife is provided with a first guiding bevel for easy installation, and the second groove is provided with a second guiding bevel that matches the first guiding bevel.

[0017] In one embodiment, the nail magazine seat assembly includes a nail magazine seat, a limiting end surface arranged on the nail magazine seat for limiting the movement of the push knife plate, and a cutting knife limiting spring piece, and the cutting knife limiting spring piece makes the push knife plate tend to approach the limiting end surface.

[0018] In one of the embodiments, the distal end of the push blade plate is provided with a limiting portion that cooperates with the limiting end surface, and the proximal end of the push blade plate is provided with a pressing portion that cooperates with the cutting blade limiting spring sheet.

[0019] In order to overcome the deficiencies of the prior art, the second technical solution provided by the present invention is:

[0020] A stapler comprises the cutting knife mechanism described in any one of the above items.

[0021] In the above technical solution, the proximal end refers to the end away from the patient during operation, and the distal end refers to the end close to the patient.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] 1. The cutting knife and the nail pushing slider overlap each other and are both slidably set on the nail bin, which is convenient for the removal and replacement of the cutting knife. The structure is reliable and the failure rate is low;

[0024] 2. A safety release protrusion is provided on the push blade plate to cooperate with the safety release part on the cutting blade, and a cutting blade reset hook is provided to cooperate with the reset protrusion. The safety release protrusion abuts against the safety release part to push the cutting blade forward. After the cutting is completed, the push blade plate is reset first, and then the reset protrusion is driven by the cutting blade reset hook to reset the cutting blade;

[0025] 3. The first groove and the second groove are arranged on the push blade plate to facilitate the close cooperation between the cutting blade and the push blade plate and improve the compactness of the structure;

[0026] 4. A first guiding bevel is arranged on the cutting blade, and a second guiding bevel cooperating with the first guiding bevel is arranged in the second groove, so as to facilitate the installation of the cutting blade assembly and improve the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an embodiment of a cutting knife mechanism of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0030] Figure 3 This is a schematic diagram of the cutting knife reset state in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the insurance principle in an embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the installation structure of the cutting blade assembly in an embodiment of the present invention;

[0033] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0034] Figure 7 It is a schematic diagram of the disassembled structure of the cutting blade assembly in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of a nail magazine in an embodiment of the present invention;

[0036] Fig. 9 for Figure 8 A partial enlarged view of point C in the middle;

[0037] Fig.10 This is one of the structural schematic diagrams of the cutting knife in the embodiment of the present invention;

[0038] Fig.11 This is a second structural schematic diagram of a cutting knife in an embodiment of the present invention;

[0039] Fig.12 It is a structural schematic diagram of a pin-pushing slider in an embodiment of the present invention;

[0040] Fig.13 Schematic diagram of the structure of the push blade plate in the embodiment of the present invention;

[0041] Fig.14 This is a schematic structural diagram of a nail magazine seat assembly in an embodiment of the present invention;

[0042] Fig.15 for Fig.14 Schematic diagram of the middle DD section;

[0043] in:

[0044] 1. Cutting knife assembly 11, nail magazine 111, knife groove 1111, slider limiting protrusion; 112, sliding groove; 113, cutting knife limiting protrusion; 12, cutting knife; 121, blade portion; 122, overlapping protrusion 123, reset protrusion 124, safety release portion 125, support portion 13, nail pushing slider; 131, supporting rib; 1311, limiting groove 132, driving rib; 133, overlapping platform 134, accommodating groove 14, nail magazine bracket;

[0045] 21. Blade push plate; 211. Safety release protrusion; 212. Cutting knife reset hook; 213. Pressing part; 214. Limiting part; 22. Nail magazine seat assembly; 221. Cutting knife limiting spring piece; 222. Nail magazine seat; 2221. Limiting end face; 23. Nail support seat. DETAILED DESCRIPTION

[0046] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present invention and are not limited to the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0047] like Figure 1 and Figure 2As shown, it is a structural schematic diagram of an embodiment of the present invention, which provides a cutting knife mechanism, including a nail magazine seat assembly 22, a nail support seat 23 hinged to the nail magazine seat assembly 22, a cutting knife assembly 1 detachably arranged in the nail magazine seat assembly 22, and a pushing knife plate 21 matched with the cutting knife assembly 1, the pushing knife plate 21 is connected to the firing rod, and the cutting knife is driven to move forward by the pushing knife plate 21 to complete the cutting and anastomosis of the tissue. The firing action of the firing rod adopts the structure in the prior art, which will not be repeated in the present invention.

[0048] like Figure 7 As shown, the cutting knife assembly 1 includes a nail magazine 11, a cutting knife 12, a nail pushing slider 13 and a nail magazine bracket 14.

[0049] like Figure 8 and Fig. 9 As shown, the nail magazine 11 includes a knife groove 111 extending along the length direction and a plurality of sliding grooves 112 arranged on both sides of the knife groove 111, and a cutting knife limiting protrusion 113 is provided at the proximal end of the nail magazine 11, wherein the knife groove 111 is located in the middle of the nail magazine 11, and the number of the sliding grooves 112 is four, and two sliding grooves 112 are arranged on both sides of the knife groove 111 respectively.

[0050] like Fig.10 and Fig.11 As shown, the cutting knife 12 includes a blade portion 121 slidably disposed in the knife groove 111, a lap protrusion 122 disposed at the distal end of the cutting knife 12, a safety release portion 124 disposed at the proximal end of the cutting knife 12 and cooperating with the blade push plate 21, a support portion 125 disposed on the cutting knife 12 and cooperating with the nail magazine 11, and a reset protrusion 123 disposed on the support portion 125, as shown in FIG. Fig.11 As shown, the support portion 125 is a flat plate-like structure arranged at the upper end of the cutting knife 12, and the body of the cutting knife 12 is vertically arranged in the middle of the support portion 125. The lower end surface of the support portion 125 cooperates with the upper end surface of the nail magazine 11 to support the cutting knife 12 on the nail magazine 11, and the distal end of the support portion 125 cooperates with the cutting knife limiting protrusion 113 to limit the cutting knife 12 in the nail magazine 11 to prevent the cutting knife 12 from detaching from the nail magazine 11 when resetting.

[0051] like Fig.12 As shown, the nail pushing slider 13 is slidably matched with the nail magazine 11, including a support rib 131 matched with the knife groove 111, four driving ribs 132 arranged on both sides of the support rib 131 and matched with the sliding groove 112, and a lap platform 133 arranged at the proximal end of the nail pushing slider 13 and matched with the lap protrusion 122. Through the cooperation of the lap protrusion 122 and the lap platform 133, the tight fit between the cutting knife 12 and the nail pushing slider 13 is ensured.

[0052] The nail magazine bracket 14 is arranged outside the nail magazine 11 and is used to limit the cutting knife 12 and the nail pushing slider 13 on the nail magazine 11. The nail magazine bracket 14 is provided with an avoidance groove extending along the length direction for the reset protrusion 123 to pass through.

[0053] In order to improve the compactness of the structure, a receiving groove 134 for the cutting knife 12 to be placed is provided at the proximal end of the nail pushing slider 13 .

[0054] In order to determine the initial position of the nail pushing slider 13 in the nail magazine 11, slider limiting protrusions 1111 are respectively provided on both sides of the knife groove 111. Preferably, the slider limiting protrusion 1111 is a cylindrical structure, and limiting grooves 1311 cooperating with the slider limiting protrusion 1111 are respectively provided on both sides of the support rib 131. When the nail pushing slider 13 is in the initial position, the slider limiting protrusion 1111 is located in the limiting groove 1311. When the cutting knife 12 drives the nail pushing slider 13 to move forward, the slider limiting protrusion 1111 can be separated from the limiting groove 1311 and continue to move forward.

[0055] like Fig.13 As shown, a safety release protrusion 211 cooperating with the safety release portion 124 and a cutting knife resetting hook 212 cooperating with the resetting protrusion 123 are provided at the distal end of the pushing knife plate 21. When the safety release protrusion 211 abuts against the safety release portion 124, the safety can be released, and then the tissue can be cut and anastomosed, and the cutting knife resetting hook 212 cooperates with the resetting protrusion 123 to reset the cutting knife 12.

[0056] In order to improve the compactness of the structure and ensure a close fit between the push blade plate 21 and the cutting blade 12, a first groove for partially inserting the cutting blade 12 is formed between the cutting blade reset hook 212 and the safety release protrusion 211, and a second groove for partially inserting the cutting blade 12 is formed between the safety contact protrusion 211 and the body of the push blade plate 21.

[0057] In order to facilitate the installation of the cutting blade assembly 1, a first guiding bevel for easy installation is provided at the proximal end of the cutting blade 12, and a second guiding bevel cooperating with the first guiding bevel is provided in the second groove. Figure 5 and Figure 6 As shown, the cutting knife assembly 1 is tilted and placed in the nail magazine seat assembly 22, and the cutting knife 12 is engaged with the push knife plate 21 through the cooperation of the first guide bevel and the second guide bevel, so that the reset protrusion 123 is placed in the first groove, and the safety release protrusion 211 abuts on the safety release part 124, the jaws are closed, and the nail seat 23 abuts against the nail magazine 11. The cutting knife assembly 1 is installed in place and can cut and staple the tissue.

[0058] like Fig.14 and Fig.15As shown, the nail magazine seat assembly 22 includes a nail magazine seat 222, a limiting end face 2221 provided on the nail magazine seat 222 for limiting the movement of the push blade plate 21, and a cutting knife limiting spring piece 221, and the cutting knife limiting spring piece 221 makes the push blade plate 21 have a tendency to approach the limiting end face 2221. Specifically, a limiting portion 214 cooperating with the limiting end face 2221 is provided at the distal end of the push blade plate 21, and a pressing portion 213 cooperating with the cutting knife limiting spring piece 221 is provided at the proximal end of the push blade plate 21.

[0059] In addition, the present invention also relates to a stapler, comprising the above-mentioned cutting knife mechanism.

[0060] The working principle of the present invention is:

[0061] When the cutting knife assembly 1 is provided in the nail magazine seat 222, the cutting knife limiting spring piece 221 abuts against the pressing portion 213 to make the push knife plate 21 move downward. When the push knife plate 21 moves forward, the limiting portion 214 abuts against the limiting end surface 2221 to block the push knife plate 21 from moving forward, playing a safety role (such as Figure 4 When the cutting knife assembly 1 is placed in the staple cartridge seat 222, the safety release protrusion 211 on the pushing knife plate 21 abuts against the safety release portion 124 on the cutting knife 12. When the pushing knife plate 21 moves forward, the safety release protrusion 211 lifts the pushing knife plate 21, so that it overcomes the effect of the cutting knife limiting spring sheet 221 and does not abut against the limiting end surface 2221. The safety is released, and the pushing knife plate 21 can continue to move forward to cut and anastomose tissues.

[0062] After the cutting is completed, the push blade plate 21 first retreats a distance, and when the cutting blade reset hook 212 abuts against the reset protrusion 123, the push blade plate 21 can drive the cutting blade 12 to complete the reset (such as Figure 3 shown).

[0063] In summary, the cutting knife mechanism is convenient for disassembly and replacement of the cutting knife, has a simple structure and few failure points.

[0064] The above examples are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting knife mechanism, comprising a nail magazine seat assembly, a nail support seat hinged to the nail magazine seat assembly, a cutting knife assembly detachably arranged in the nail magazine seat assembly, and a push knife plate matched with the cutting knife assembly, characterized in that: The cutting blade assembly comprises: A nail magazine, comprising a knife groove extending in the length direction and a plurality of sliding grooves arranged on both sides of the knife groove, and a cutting knife limiting protrusion is provided at the proximal end of the nail magazine; The cutting knife comprises a blade portion slidably arranged in the knife groove, a lap protrusion arranged at the distal end of the cutting knife, a safety release portion arranged at the proximal end of the cutting knife and cooperating with the knife push plate, a support portion arranged on the cutting knife and cooperating with the nail magazine, and a reset protrusion arranged on the support portion, wherein the support portion cooperates with the cutting knife limiting protrusion to limit the cutting knife in the nail magazine; A nail-pushing slider, which is slidably matched with the nail magazine, comprises a supporting rib matched with the knife groove, a plurality of driving ribs arranged on both sides of the supporting rib and matched with the sliding groove, and a lap platform arranged at the proximal end of the nail-pushing slider and matched with the lap protrusion; A nail magazine bracket is arranged outside the nail magazine and is used to limit the cutting knife and the nail pushing slider on the nail magazine.

2. The cutting blade mechanism according to claim 1, characterized in that: Slider limiting protrusions are respectively arranged on both sides of the knife groove, and limiting grooves matching with the slider limiting protrusions are respectively arranged on both sides of the support rib.

3. The cutting blade mechanism according to claim 2, characterized in that: The slider limiting protrusion is in a cylindrical structure.

4. The cutting blade mechanism according to claim 1, characterized in that: The proximal end of the nail-pushing slider is provided with an accommodating groove for the cutting knife to be placed therein.

5. The cutting blade mechanism according to claim 1, characterized in that: The distal end of the blade pushing plate is provided with a safety release protrusion matched with the safety release portion and a cutting blade resetting hook matched with the resetting protrusion.

6. The cutting blade mechanism according to claim 5, characterized in that: A first groove for partially inserting the cutting knife is formed between the cutting knife resetting hook and the safety release protrusion, and a second groove for partially inserting the cutting knife is formed between the safety release protrusion and the body of the pushing knife plate.

7. The cutting blade mechanism according to claim 6, characterized in that: The proximal end of the cutting knife is provided with a first guiding bevel for easy installation, and the second groove is provided with a second guiding bevel that matches the first guiding bevel.

8. The cutting blade mechanism according to claim 1, characterized in that: The nail magazine seat assembly includes a nail magazine seat, a limiting end surface set on the nail magazine seat for limiting the movement of the push knife plate, and a cutting knife limiting spring piece, and the cutting knife limiting spring piece makes the push knife plate tend to approach the limiting end surface.

9. The cutting blade mechanism according to claim 8, characterized in that: The distal end of the push blade plate is provided with a limiting portion matched with the limiting end surface, and the proximal end of the push blade plate is provided with a pressing portion matched with the cutting blade limiting spring sheet.

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

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