Cutting knife structure capable of reducing friction

Abstract

The cutting knife structure capable of reducing friction comprises a cutting knife head, the cutting knife head is connected with a nail abutting seat and a nail bin base in a sliding mode, and the cutting knife head is an I-shaped beam and comprises an upper cross beam, a lower cross beam and a connecting vertical beam connecting the upper cross beam and the lower cross beam. The bottoms of the two upper plates, protruding out of the connecting vertical beams, of the two sides of the upper cross beam are provided with first sliding parts in sliding connection with the nail abutting base, the tops of the two lower plates, protruding out of the connecting vertical beams, of the two sides of the lower cross beam are provided with second sliding parts in sliding connection with the nail bin base, and the first sliding parts and the second sliding parts are oppositely arranged. The sliding contact face of the first sliding part and the nail abutting base is in an arc shape, and the sliding contact face of the second sliding part and the nail bin base is also in an arc shape. According to the utility model, the structure of the cutting knife head is improved, and the surface-to-surface contact between the cutting knife head and the nail propping seat as well as between the cutting knife head and the nail bin base is changed into line-to-surface contact, so that the overall friction force can be effectively reduced, the cutting efficiency is improved, and the ineffective work in a system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a cutting knife structure of reducing friction and surgical instrument. BACKGROUND

[0002] Surgical cutting anastomat is a kind of surgical instrument commonly used in medicine to replace handwork suture, and the main working principle is to cut off tissue using cutting knife and anastomize tissue using titanium nail, similar to stapler.Surgical cutting anastomat includes cutting knife assembly, and cutting knife assembly can be driven to move forward and backward by driving unit to cut tissue, and cutting knife assembly is connected with driving unit by cutting knife head.

[0003] As shown in prior art, Figure 1 When cutting knife assembly moves to cut tissue, cutting knife head firmly pulls down anvil seat and nail cartridge base to prevent jaw from opening, at this time, cutting knife head is subjected to very large pressure, and when moving forward in this pressure state, very large friction force is generated, and cutting knife head and anvil seat and nail cartridge base are in surface-to-surface contact, so the friction coefficient is large, which increases invalid work in system and affects cutting efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a cutting knife structure of reducing friction to overcome the deficiencies in prior art.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a cutting knife structure of reducing friction, including cutting knife head, cutting knife head is slidably connected with anvil seat and nail cartridge base, cutting knife head is I-shaped beam, including upper cross beam, lower cross beam and connecting vertical beam connecting upper cross beam and lower cross beam, two upper plate bottoms of connecting vertical beam protruding from both sides of upper cross beam are provided with sliding part one slidably connected with anvil seat, two lower plate tops of connecting vertical beam protruding from both sides of lower cross beam are provided with sliding part two slidably connected with nail cartridge base, sliding part one and sliding part two are oppositely arranged, and the sliding contact surface of sliding part one and anvil seat is arc-shaped and includes at least one arc-shaped boss, and the sliding contact surface of sliding part two and nail cartridge base is also arc-shaped and includes at least one arc-shaped boss.

[0006] Further, the cutting knife structure of reducing friction is that sliding part one is an arc-shaped boss integrated with upper cross beam upper plate, and the central axis of arc-shaped boss of sliding part one is perpendicular to the sliding direction of cutting knife head, and sliding part two is an arc-shaped boss integrated with lower cross beam lower plate, and the central axis of arc-shaped boss of sliding part two is perpendicular to the sliding direction of cutting knife head.

[0007] Further, the cutting knife structure for reducing friction, the sliding part one includes a plurality of small arc-shaped bosses arranged along the sliding direction of the cutting knife head, and the small arc-shaped bosses of the plurality of sliding part one are uniformly arranged along the width direction of the upper plate of the upper cross beam.

[0008] Further, the cutting knife structure for reducing friction, the small arc-shaped bosses of the sliding part one are arc-shaped bosses protruding from the bottom surface of the upper plate of the upper cross beam and integrally formed with the upper plate, and the small arc-shaped bosses of the sliding part two are arc-shaped bosses protruding from the top surface of the lower plate of the lower cross beam and integrally formed with the lower plate.

[0009] Further, the cutting knife structure for reducing friction, the small arc-shaped bosses of the sliding part one are small round metal wires or carbon fibers wound on the upper plate of the upper cross beam, and the small arc-shaped bosses of the sliding part two are also small round metal wires or carbon fibers wound on the lower plate of the lower cross beam.

[0010] Further, the cutting knife structure for reducing friction, the connecting vertical beam one side is provided with a driving part connected with the driving unit, and the driving part is an "Ω" shaped block protruding from the connecting vertical beam.

[0011] The utility model also provides a surgical instrument, including cutting knife subassembly, cutting knife subassembly includes above-mentioned cutting knife structure.

[0012] Compared with the prior art, the utility model has the advantages that: the utility model improves the structure of the cutting knife head, changes the face-to-face contact of the cutting knife head, the nail seat and the nail cartridge base into line-to-surface contact, can effectively reduce the friction coefficient, thereby reducing the overall friction, improving the cutting efficiency and reducing the invalid work in the system. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments in the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0014] Figure 1 It is the structural schematic diagram of prior art;

[0015] Figure 2 It is the structural schematic diagram of the cutting knife structure for reducing friction of the utility model;

[0016] Figure 3Structure diagram of the embodiment 1 of the utility model Figure 1 ;

[0017] Figure 4 Structure diagram of the embodiment 1 of the utility model Figure 2 ;

[0018] Figure 5 Structure diagram of the embodiment 1 of the utility model Figure 3 ;

[0019] Figure 6 Structure diagram of the embodiment 2 of the utility model Figure 1 ;

[0020] Figure 7 Structure diagram of the embodiment 2 of the utility model Figure 2 ;

[0021] Figure 8 Structure diagram of the embodiment 3 of the utility model

[0022] In the figure: 1, cutting knife head; 11, upper cross beam; 12, lower cross beam; 13, connecting vertical beam; 14, sliding part one; 15, sliding part two; 2, resist nail seat; 3, nail magazine base. Specific implementation

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Embodiment 1

[0025] As Figures 2-4As shown, a friction-reducing cutting blade structure includes a cutting blade head 1, which is slidably connected to an anvil seat 2 and a staple cartridge base 3. The cutting blade head 1 is an I-beam, including an upper crossbeam 11, a lower crossbeam 12, and a connecting vertical beam 13 connecting the upper crossbeam 11 and the lower crossbeam 12. The two upper plates protruding from both sides of the upper crossbeam 11 and connecting to the vertical beam 13 have sliding parts 14 at their bottoms that are slidably connected to the anvil seat 2. The two lower plates protruding from both sides of the lower crossbeam 12 and connecting to the vertical beam 13 have sliding parts 14 at their tops. A second sliding part 15 is slidably connected to the staple cartridge base 3. The first sliding part 14 and the second sliding part 15 are arranged opposite to each other, and the sliding contact surface between the first sliding part 14 and the staple seat 2 is arc-shaped, and the sliding contact surface between the second sliding part 15 and the staple cartridge base 3 is also arc-shaped. This makes the sliding contact between the cutting blade head 1 and the staple seat 2 and the staple cartridge base 3 a line-surface contact. Compared with the prior art, this can effectively reduce the coefficient of friction, thereby reducing the overall friction, improving the cutting efficiency, and reducing the ineffective work in the system. In addition, a driving part 16 connected to the driving unit is provided on one side of the connecting vertical beam 13. The driving part 16 is an "Ω"-shaped block protruding from the connecting vertical beam 13.

[0026] Among them, such as Figures 3-4 As shown, the sliding part 14 is an arc-shaped boss integral with the upper plate of the upper crossbeam 11, and the central axis of the arc-shaped boss of the sliding part 14 is parallel to the sliding direction of the cutting blade head 1. Figure 2 The direction indicated by the middle arrow is perpendicular to the sliding part 15, which is an arc-shaped boss integral with the lower plate of the lower crossbeam 12, and the central axis of the arc-shaped boss of the sliding part 15 is perpendicular to the sliding direction of the cutting blade head 1.

[0027] It should be noted that the central axis of the arc-shaped bosses of sliding part 14 and sliding part 2 15 can also be set to be parallel to the sliding direction of the cutting blade head 1, such as... Figure 5 As shown, this orientation results in a longer line contact length for the sliding part compared to a line contact length perpendicular to the sliding direction.

[0028] Example 2

[0029] like Figure 2 , 6As shown in Figure 7, a friction-reducing cutting blade structure includes a cutting blade head 1, which is slidably connected to an anvil seat 2 and a staple cartridge base 3. The cutting blade head 1 is an I-beam, including an upper crossbeam 11, a lower crossbeam 12, and a connecting vertical beam 13 connecting the upper crossbeam 11 and the lower crossbeam 12. The bottom of the two upper plates protruding from both sides of the upper crossbeam 11 and connecting to the vertical beam 13 are provided with sliding parts 14 that are slidably connected to the anvil seat 2. The top of the two lower plates protruding from both sides of the lower crossbeam 12 and connecting to the vertical beam 13 are... A second sliding part 15 is provided, which is slidably connected to the staple cartridge base 3. The first sliding part 14 and the second sliding part 15 are arranged opposite to each other. The sliding contact surface between the first sliding part 14 and the staple seat 2 is arc-shaped, and the sliding contact surface between the second sliding part 15 and the staple cartridge base 3 is also arc-shaped. This makes the sliding contact between the cutting blade head 1 and the staple seat 2 and the staple cartridge base 3 a line-surface contact. Compared with the prior art, this can effectively reduce the coefficient of friction, thereby reducing the overall friction, improving the cutting efficiency, and reducing the ineffective work in the system. In addition, a driving part 16 connected to the driving unit is provided on one side of the connecting vertical beam 13. The driving part 16 is an "Ω"-shaped block protruding from the connecting vertical beam 13.

[0030] Among them, such as Figures 6-7 As shown, the sliding part 14 includes multiple small arc-shaped protrusions arranged along the sliding direction of the cutting blade head 1. These small arc-shaped protrusions of the sliding part 14 are evenly distributed along the width direction of the upper plate of the upper crossbeam 11. Similarly, the sliding part 15 also includes multiple small arc-shaped protrusions arranged along the sliding direction of the cutting blade head 1. These small arc-shaped protrusions of the sliding part 15 are evenly distributed along the width direction of the lower plate of the lower crossbeam 12. In this embodiment, both the sliding part 14 and the sliding part 15 have two small arc-shaped protrusions.

[0031] like Figure 7 As shown, the small arc-shaped boss of the sliding part 14 protrudes from the bottom surface of the upper plate of the upper crossbeam 11 and is integrally formed with the upper plate. The small arc-shaped boss of the sliding part 2 15 protrudes from the top surface of the lower plate of the lower crossbeam 12 and is integrally formed with the lower plate. This arc-shaped boss can be integrally formed by stamping, but is not limited to this processing method.

[0032] Example 3

[0033] like Figure 2 , 8As shown in the figure, a cutting knife structure for reducing friction includes a cutting knife head 1, the cutting knife head 1 is in sliding connection with a nail abutting seat 2 and a nail cartridge base 3, the cutting knife head 1 is an I-shaped beam, including an upper cross beam 11, a lower cross beam 12 and a connecting vertical beam 13 connecting the upper cross beam 11 and the lower cross beam 12, two upper plate bottoms of the upper cross beam 11 protruding the connecting vertical beam 13 on both sides are provided with sliding parts one 14 in sliding connection with the nail abutting seat 2, two lower plate tops of the lower cross beam 12 protruding the connecting vertical beam 13 on both sides are provided with sliding parts two 15 in sliding connection with the nail cartridge base 3, the sliding parts one 14 and the sliding parts two 15 are oppositely arranged, and the sliding contact surface of the sliding parts one 14 and the nail abutting seat 2 is arc-shaped, and the sliding contact surface of the sliding parts two 15 and the nail cartridge base 3 is also arc-shaped, so that the sliding contact of the cutting knife head 1 and the nail abutting seat 2 and the nail cartridge base 3 becomes line-surface contact, compared with the prior art, the friction coefficient can be effectively reduced, the overall friction can be reduced, the cutting efficiency is improved, and the invalid work in the system is reduced. In addition, one side of the connecting vertical beam 13 is provided with a driving part 16 connected with a driving unit, and the driving part 16 is an "Ω" shaped block protruding the connecting vertical beam 13.

[0034] As shown in the figure, Figure 2 , 8 As shown in the figure, the sliding parts one 14 include a plurality of small arc-shaped bosses arranged along the sliding direction of the cutting knife head 1, the small arc-shaped bosses of the plurality of sliding parts one 14 are uniformly arranged along the width direction of the upper plate of the upper cross beam 11, and the sliding parts two 15 also include a plurality of small arc-shaped bosses arranged along the sliding direction of the cutting knife head 1, the small arc-shaped bosses of the plurality of sliding parts two 15 are uniformly arranged along the width direction of the lower plate of the lower cross beam 12.

[0035] As shown in the figure, Figure 8 As shown in the figure, the small arc-shaped bosses of the sliding parts one 14 are thin circular metal wires or carbon fibers wound on the upper plate of the upper cross beam 11, and the small arc-shaped bosses of the sliding parts two 15 are thin circular metal wires or carbon fibers wound on the lower plate of the lower cross beam 12, and can be replaced and repaired after wear. In the embodiment, two turns of thin circular metal wires or carbon fibers are wound outside the sliding parts one 14 and the sliding parts two 15.

[0036] The utility model also provides a surgical instrument, including cutting knife subassembly, cutting knife subassembly includes above-mentioned cutting knife structure.

[0037] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0038] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A cutting knife structure for reducing friction, comprising a cutting knife head (1), the cutting knife head (1) is in sliding connection with a nail resisting seat (2) and a nail cartridge base (3), characterized in that: The cutting knife head (1) is an I-shaped beam, comprising an upper beam (11), a lower beam (12) and a connecting vertical beam (13) connecting the upper beam (11) and the lower beam (12), the two upper plate bottoms of the upper beam (11) protruding the connecting vertical beam (13) are provided with sliding part one (14) slidingly connected with the nail abutting seat (2), the two lower plate tops of the lower beam (12) protruding the connecting vertical beam (13) are provided with sliding part two (15) slidingly connected with the nail cartridge base (3), the sliding part one (14) and the sliding part two (15) are oppositely arranged, the sliding contact surface of the sliding part one (14) and the nail abutting seat (2) is arc-shaped and comprises at least one arc-shaped boss, and the sliding contact surface of the sliding part two (15) and the nail cartridge base (3) is also arc-shaped and comprises at least one arc-shaped boss.

2. The reduced friction cutting knife structure of claim 1, wherein: The sliding part one (14) is an arc-shaped boss integrated with the upper plate of the upper beam (11), and the center axis of the arc-shaped boss one of the sliding part one (14) is perpendicular to the sliding direction of the cutting knife head (1), the sliding part two (15) is an arc-shaped boss integrated with the lower plate of the lower beam (12), and the center axis of the arc-shaped boss of the sliding part two (15) is perpendicular to the sliding direction of the cutting knife head (1).

3. The reduced friction cutting tool structure according to Claim 1 wherein: The sliding part one (14) comprises a plurality of small arc-shaped bosses arranged along the sliding direction of the cutting knife head (1), the small arc-shaped bosses of the sliding part one (14) are uniformly arranged along the width direction of the upper plate of the upper beam (11), and the sliding part two (15) also comprises a plurality of small arc-shaped bosses arranged along the sliding direction of the cutting knife head (1), the small arc-shaped bosses of the sliding part two (15) are uniformly arranged along the width direction of the lower plate of the lower beam (12).

4. The reduced friction cutting tool structure according to Claim 3 wherein: The small arc-shaped boss of the sliding part one (14) is a boss protruding the bottom surface of the upper plate of the upper beam (11) and integrally formed with the upper plate, and the small arc-shaped boss of the sliding part two (15) is a boss protruding the top surface of the lower plate of the lower beam (12) and integrally formed with the lower plate.

5. The reduced friction cutting tool structure according to Claim 3 wherein: The small arc-shaped boss of the sliding part one (14) is a thin circular metal wire or carbon fiber wound on the upper plate of the upper beam (11), and the small arc-shaped boss of the sliding part two (15) is a thin circular metal wire or carbon fiber wound on the lower plate of the lower beam (12).

6. The reduced friction cutting tool structure according to Claim 1 wherein: The connecting vertical beam (13) is provided with a driving part (16) connected with the driving unit on one side, and the driving part (16) is an "Ω" type block protruding the connecting vertical beam.

7. A surgical instrument comprising a cutting knife assembly, characterized by: The cutting knife assembly comprises the cutting knife structure according to any one of claims 1-6.

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