CN103181802A - A linear sewing cutter for surgery - Google Patents

Abstract

The invention discloses a linear suturing and cutting device for surgery, which comprises a nail anvil and a nail bin which are oppositely arranged, wherein a nail anvil cap is arranged at the front end of the nail anvil, a round hole is formed in the front end surface of the nail anvil, a hollow cylinder is convexly arranged on the surface of the nail anvil cap, which faces the nail anvil, the outer diameter of the hollow cylinder is equal to the inner diameter of the round hole, and an auxiliary connecting piece for reinforcing connection is arranged between the nail anvil and the nail anvil cap. The invention has the following beneficial effects: the connection between the nail anvil cap and the nail anvil is tighter, and the falling-off of the nail anvil cap is effectively prevented.

Description

A linear sewing cutter for surgery

technical field

The invention relates to a linear suture cutter for surgery, which belongs to the technical field of medical instruments.

Background technique

Linear sewing cutters are widely used in surgical operations for wound suturing, internal tissue suturing and cutting. Typical linear sewing cutters, as disclosed in U.S. Patent No. 5,129,570, have two functions of suturing and cutting. While suturing wounds, Excess tissue is excised. This type of linear seam cutter generally includes upper and lower jaws, and a closing handle for closing the upper and lower jaws. The firing piece and the cutter can be moved relative to the staple cartridge at the same time, and the push button for driving the movement of the firing piece and the cutter. Staples are arranged in the staple cartridge, the firing piece sequentially pushes the staple pushers and pushes the staples to the anvil, and the cutter cuts off the tissue located between the staple cartridge and the anvil.

An anvil cap is usually fixed on the front end of the anvil of the existing surgical linear seam cutter, and a connecting cylinder is provided at the end of the anvil cap relative to the anvil. When installing, the connecting cylinder part only needs to be squeezed into the reserved hole of the anvil Inside, because of the process of relative extrusion, there is a stress concentration effect at the root of the hollow cylinder at the joint between the anvil cap and the anvil, which makes the hollow cylinder easy to break. At the same time, after long-distance transportation, new products may be scrapped due to extrusion.

Contents of the invention

The purpose of the present invention is to provide a kind of surgical linear seam cutter that prevents the anvil cap from coming off.

The purpose of the present invention will be achieved through the following technical solutions:

A linear sewing cutter for surgery, comprising a nail anvil and a nail bin arranged oppositely, the front end of the nail anvil is provided with a nail anvil cap, the front end surface of the nail anvil is provided with a round hole, and the nail anvil cap surface A hollow cylinder is protruded on the surface of the anvil, the outer diameter of the hollow cylinder is equal to the inner diameter of the circular hole, and an auxiliary connecting piece for strengthening the connection is arranged between the anvil and the anvil cap.

Preferably, the auxiliary connecting piece is a bolt, the hollow cylinder is provided with a hole, the nail anvil is provided with a hole corresponding to the hole, and the bolt is inserted into the hole and the hole at the same time.

Preferably, the hole on the nail anvil is a through hole passing through the nail anvil, and the pin goes through the hole.

Preferably, the hole on the anvil is a half-through hole passing through only one wall of the anvil, and the pin passes through the hole and enters the through hole.

Preferably, the perforation is a semi-through hole passing through only one wall of the hollow cylinder.

Preferably, the pin is a round pin or a square pin.

Preferably, the holes are arranged on the surface or side of the anvil.

Alternatively, the auxiliary connector is a tapered column arranged in the hollow cylinder, the thin end of the tapered column is inserted into the hollow cylinder, and the thick end of the tapered column is exposed to the port of the hollow cylinder , the hollow cylinder inserted into the tapered column is connected and arranged in the circular hole.

Alternatively, the auxiliary connector is an arc-shaped hollow protrusion protruding from the front end of the anvil, and a corresponding concave arc-shaped hollow protrusion on the surface of the anvil cap facing the arc-shaped hollow protrusion. An arc-shaped groove, the arc-shaped hollow protrusion can be inserted into the arc-shaped groove; the arc-shaped hollow protrusion has an opening, and the opening communicates with the cutter groove on the nail anvil.

Alternatively, the auxiliary connector is a buckle arranged on the surface of the nail anvil cap facing the nail anvil, and the buckle includes an extended buckle arm and a buckle at the end of the buckle arm. Buckle barb, the front end of the nail anvil is correspondingly provided with a buckle for receiving the buckle barb.

The beneficial effects of the present invention are mainly reflected in: making the connection between the nail anvil cap and the nail anvil more tightly, and effectively preventing the nail anvil cap from falling off.

Description of drawings

Fig. 1 is a cross-sectional view of an anvil portion of a first embodiment of the present invention.

Fig. 2 is a sectional view of part A-A in Fig. 1 .

Fig. 3 is a cross-sectional view of an anvil according to a second embodiment of the present invention.

Fig. 4 is a top view of the anvil of the second embodiment of the present invention.

Fig. 5 is a top view of an anvil portion of a third embodiment of the present invention.

Fig. 6 is a sectional view of A-A in Fig. 5 .

Fig. 7 is a schematic perspective view of an anvil according to a fourth embodiment of the present invention.

Fig. 8 is a cross-sectional view of an anvil portion of a fourth embodiment of the present invention.

Fig. 9 is an exploded schematic view of part of the anvil assembly according to the fifth embodiment of the present invention.

Detailed ways

【The first embodiment】

As shown in Fig. 1, the present invention provides a linear sewing cutter for surgery. Consistent with the prior art, the linear seam cutter includes an upper jaw 9 and a lower jaw that can be closed or opened mutually, the pivot is arranged on the lower jaw and is used to close the closing handle of the upper and lower jaws, and the upper jaw The far end of clip 9 is provided with nail anvil 1, and the far end of lower jaw is provided with nail bin.

As shown in Fig. 1 and Fig. 2, the front end of described nail anvil 1 is provided with nail anvil cap 3, and the front end face of described nail anvil 1 is provided with a round hole 4, and the face of described nail anvil cap 3 faces nail anvil 1 A hollow cylinder 5 is convexly provided on the surface of the hollow cylinder 5, the outer diameter of the hollow cylinder 5 is equal to the inner diameter of the circular hole, and the hollow cylinder 5 is inserted into the circular hole 4.

A perforation 6 is provided on the hollow cylinder 5 , and slots 7 are provided on both sides of the anvil 1 corresponding to the perforation 6 , that is, the slots 7 are through holes through the anvil 1 . The perforation 6 and the hole groove 7 are all circular, and the linear seam cutter also includes a pin 8, and the pin 8 is a cylindrical long pin, and the pin 8 is connected from one side of the anvil 1 Hole 7 penetrates, penetrates the hollow cylinder 5 of nail anvil cap 3, then passes through the other side hole 7 of nail anvil 1, and the connection of described bolt 8 and nail anvil cap 3 forms interference fit, makes nail The anvil 1 and the anvil cap 3 are more closely connected to prevent the anvil cap 3 from coming off.

【Second Embodiment】

This embodiment is substantially the same as the first embodiment, as shown in Figure 3 and Figure 4, the front end of the anvil 1 is provided with an anvil cap 3, and the front end of the anvil 1 is provided with a round hole 4 The surface of the anvil cap 3 is convexly provided with a hollow cylinder 5 against the surface of the anvil 1, the outer diameter of the hollow cylinder 5 is equal to the inner diameter of the circular hole, and the hollow cylinder 5 is inserted into the circular hole 4 .

A perforation 6 is provided on the hollow cylinder 5 , and the perforation 6 is a half-through hole that only passes through one wall of the hollow cylinder 5 . The hole groove 7 on the nail anvil is a half-through hole that only passes through one of the walls of the nail anvil 1, and the bolt 8 passes through the hole groove 7 and enters the perforation 6, that is, the square Short pin 13 only passes through one side of nail anvil 1.

[Third embodiment]

As shown in Fig. 5 and Fig. 6, the front end of described nail anvil 1 is provided with nail anvil cap 3, and the front end face of described nail anvil 1 is provided with a round hole 4, and the face of described nail anvil cap 3 faces nail anvil 1 A hollow cylinder 5 is convexly provided on the surface of the hollow cylinder 5, and the outer diameter of the hollow cylinder 5 is equal to the inner diameter of the circular hole 4.

In order to increase the internal strength of the anvil cap 3 and avoid the fracture of the hollow cylinder 5, a tapered column 10 is arranged in the hollow cylinder 5, and the thin end 11 of the tapered column is inserted into the hollow cylinder 5, and the tapered column The butt end 12 is exposed at the port 13 of the hollow column 5, and the hollow cylinder 5 inserted into the tapered column 10 is then put into the round hole 4 of the anvil 1, and the wedge-shaped inclination of the tapered column is used to promote the hollow cylinder 5. 5. Expansion produces friction grip force; at the same time, after the tapered column 10 is inserted into the anvil cap, the internal strength is increased, so that the connection between the anvil cap 3 and the anvil 1 is tighter.

[Fourth Embodiment]

As shown in Fig. 7 and Fig. 8, the front end of described nail anvil 1 is provided with nail anvil cap 3, and the front end face of described nail anvil 1 is provided with a round hole 4, and described nail anvil cap 3 is opposite to nail anvil 1 A hollow cylinder 5 for connection is provided on one end surface, and the hollow cylinder 5 is inserted into the circular hole 4 so that the anvil 1 and the anvil cap 3 are connected.

The front end face of the nail anvil 1 is convexly provided with an arc-shaped hollow protrusion 15, and the surface of the nail anvil cap 3 facing the surface of the arc-shaped hollow protrusion 15 is correspondingly provided with an arc-shaped groove 16, so that The outer diameter of the arc-shaped hollow protrusion 15 is equal to the outer diameter of the arc-shaped groove 16 , so that the arc-shaped hollow protrusion 15 can be inserted into the arc-shaped groove 16 . The arc-shaped hollow protrusion 15 on the anvil 1 is inserted into the arc-shaped groove 16 on the anvil cap 3 to form an interlocking structure, so that the connection between the anvil 1 and the anvil cap 3 is tighter and firmer . The opening 17 of the arc-shaped hollow protrusion 15 is consistent with the cutter groove 14, so as not to affect the advancing path of the blade during the operation.

[fifth embodiment]

As shown in Figure 9, the front end of the anvil 1 is provided with an anvil cap 3, the front end of the anvil 1 is provided with a circular hole 4, and the face of the anvil cap 3 is convex to the surface of the anvil 1. A hollow cylinder 5 is provided, and the outer diameter of the hollow cylinder 5 is equal to the inner diameter of the circular hole 4 . The hollow cylinder 5 can be inserted into the round hole 4 as a connecting column between the anvil cap 3 and the anvil 1 .

In order to prevent the nail anvil cap from falling off, the surface of the nail anvil cap 3 facing the nail anvil 1 is fixedly provided with a buckle 2, and the buckle 2 includes an extended buckle arm 21 and a buckle arm end located at the end of the buckle arm. The snap barbs 22 on the top. The buckle arm 21 extends toward the nail anvil 1, and the front end of the nail anvil 1 is correspondingly provided with a buckle position 18 for accommodating the buckle barb 7, and the buckle barb 22 can be buckled on the nail anvil. In the button position 18, the connection between the anvil 1 and the anvil cap 3 is further strengthened.

Of course, with the buckle 2 , the outer diameter of the hollow cylinder 5 can also be slightly smaller than the inner diameter of the circular hole 4 . Like this just can prevent that the hollow cylinder 5 that nail anvil cap cooperates with nail anvil has stress concentration and the situation of fracture produces.

The present invention still has various implementation modes, for example, the bolt can be a round pin or a square pin, and the hole 7 can be arranged on the surface or side of the anvil. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. A surgical linear sewing cutter, comprising an anvil (1) and a staple cartridge oppositely arranged, the front end of the anvil (1) is provided with an anvil cap (3), the anvil (1) A round hole (4) is provided on the front end surface, and a hollow cylinder (5) protrudes from the surface of the nail anvil cap (3) facing the nail anvil (1), and the outer diameter of the hollow cylinder (5) is equal to the The inner diameter of the round hole (4) is characterized in that an auxiliary connecting piece for strengthening the connection is provided between the anvil (1) and the anvil cap (3). 2. A surgical linear sewing cutter according to claim 1, characterized in that: the auxiliary connecting piece is a pin (8), and the hollow cylinder (5) is provided with a perforation (6), so The nail anvil (1) is provided with a hole (7) corresponding to the perforation (6), and the pin (8) is inserted into the hole (7) and the perforation (6) at the same time. 3. A linear surgical cutter according to claim 2, characterized in that: the hole (7) on the anvil (1) is a through hole passing through the anvil (1), The pin (8) passes through the hole (7). 4. A linear surgical cutter according to claim 2, characterized in that: the hole (7) on the anvil (1) only passes through one of the walls of the anvil (1) The pin (8) passes through the hole slot (7) and enters the through hole (6). 5 . The linear surgical cutter according to claim 4 , characterized in that: the perforation ( 6 ) is a half-through hole that only passes through one wall of the hollow cylinder ( 5 ). 5 . 6. A linear surgical cutter according to claim 2, characterized in that: the pin (8) is a round pin or a square pin. 7. A linear surgical cutter according to claim 2, characterized in that: the hole (7) is provided on the surface or side of the anvil (1). 8. A linear surgical seam cutter according to claim 1, characterized in that: the auxiliary connecting piece is a tapered column (10) arranged in the hollow cylinder (5), and the cone The thin end (11) of the shaped column is inserted into the hollow cylinder (5), the thick end (12) of the tapered column is exposed to the port (13) of the hollow cylinder (5), and the The hollow cylinder (5) is connected and arranged in the circular hole (4). 9. A linear surgical seam cutter according to claim 1, characterized in that: the auxiliary connecting piece is an arc-shaped hollow protrusion (15) protruding from the front end surface of the anvil (1) ), and an arc-shaped groove (16) correspondingly recessed on the surface of the anvil cap (3) facing the arc-shaped hollow protrusion (15), the arc-shaped hollow protrusion (15 ) can be inserted into the arc-shaped groove (16); the arc-shaped hollow protrusion (15) has an opening (17), and the opening (17) and the cutter groove on the nail anvil (1) (14) Through. 10. A linear surgical cutter according to claim 1, characterized in that: the auxiliary connecting member is a set on the surface of the anvil cap (3) facing the anvil (1). Buckle (2), the buckle (2) includes an extended buckle arm (21) and a buckle barb (22) provided at the end of the buckle arm (21), the nail anvil The front end of (1) is correspondingly provided with a buckle (18) for accommodating the buckle barb (22).

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