CN103181803A - Suturing and cutting instrument - Google Patents

Abstract

The invention provides a seam cutter, comprising upper and lower jaws, a staple cartridge and an anvil respectively arranged on the upper and lower jaws, and a closing handle for closing the upper and lower jaws, the closing handle passes through a pin-hole structure The pivot is arranged on the upper jaw, the pin hole is in interference fit with the pivot shaft, and a U-shaped groove is provided on the side of the pin hole. The beneficial effects of the present invention are mainly reflected in that: by increasing the buffer, the toughness of the pin hole is improved, the problem of cracking of the plastic part when the plastic part and the metal part are interference fit is solved, and the safety performance of the whole seam cutter is improved.

Description

seam cutter

technical field

The invention relates to a linear seam cutter, which belongs to the field of medical instruments.

Background technique

At present, when physiological tissues such as the esophagus, stomach, and intestinal tract are surgically anastomosed, a surgical stapler is often used for anastomosis, and a linear seam cutter is a relatively important one. In the prior art, the Chinese patent application CN201010253352 describes a linear slit cutter for closing the wounds of the digestive tract and visceral tissues, generally comprising upper and lower jaws, a nail bin and an anvil respectively arranged on the upper and lower jaws, and Closure handles for closing the upper and lower jaws. The closing handle is pivotally arranged on the upper jaw through the pin hole structure, but since the pin hole of the closing handle bears relatively large torque after closing the upper and lower jaws, it is easy to twist the base of the pin hole.

In addition, the positioning block fixed on the lower jaw is also provided with a positioning pin through the pin hole structure. When the handle is closed to close the upper and lower jaws, the upper jaw will exert pressure on the positioning pin, causing the positioning There is also the possibility of cracking in the pin holes in the block, causing unnecessary trouble.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned technical problems and provide a seam cutter with high safety.

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

A seam cutter, comprising upper and lower jaws, a staple bin and an anvil respectively arranged on the upper and lower jaws, and a closing handle for closing the upper and lower jaws, the closing handle is pivotally arranged on the upper and lower jaws through a pin hole structure. On the upper jaw, the pin hole is in interference fit with the pivot shaft, and a U-shaped groove is provided on the side of the pin hole.

Preferably, the symmetry axis of the U-shaped groove passes through the center of the pin hole.

Preferably, the pin hole is hexagonal, and the U-shaped groove is opened at one of the top corners of the pin hole.

Preferably, the seam cutter includes a positioning block fixed on the lower jaw, a positioning pin is inserted into the pin hole on the positioning block with interference, and a pin hole is set on the side of the positioning block. There is a U-shaped groove.

Preferably, the symmetry axis of the U-shaped groove on the positioning block passes through the center of the pin hole.

The beneficial effects of the present invention are mainly reflected in that the toughness of the pin hole is improved by increasing the buffer, the problem of cracking of the plastic part when the plastic part and the metal part are interference fit is solved, and the safety performance of the whole seam cutter is improved.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Fig. 1: Schematic diagram of the structure of the seam cutter of the present invention.

Figure 2: Front view of a prior art sewing cutter closure handle.

Fig. 3: Front view of the closing handle of the sewing cutter of the present invention.

Figure 4: The front view of the positioning block of the prior art sewing cutter.

Fig. 5: The front view of the positioning block of the sewing cutter of the present invention.

in:

Detailed ways

The present invention discloses a seam cutter, as shown in Fig. 1, comprising an upper jaw 1 and a lower jaw 2, a nail bin and an anvil respectively arranged on the upper and lower jaws, and for closing the upper and lower jaws The closing handle3. Same as the prior art, the closing handle 3 is pivotally arranged on the upper jaw 1 through a pin hole structure, and the pin hole 31 is in interference fit with the pivot shaft. 2 and 3, the present invention is characterized in that a U-shaped groove 32 is provided on the side of the pin hole 31 . Preferably, the symmetry axis of the U-shaped groove 32 passes through the center of the pin hole 31 . In this preferred embodiment, the pin hole 31 is hexagonal, and the U-shaped slot 32 is opened at one of the top corners of the pin hole.

In this way, after the upper and lower jaws are closed, the pin hole 31 of the closed handle 3 improves the toughness of the pin hole by increasing buffering, and solves the problem of cracking of the plastic part when the plastic part and the metal part are in interference fit, so that the base of the pin hole does not It will be easily twisted off, which improves the safety performance of the entire seam cutter.

Preferably, as shown in FIG. 4 and FIG. 5 , the seam cutter includes a positioning block 4 fixed on the lower jaw 2 , and a positioning pin is inserted into the pin hole 41 on the positioning block 4 with interference 5. A U-shaped groove 42 is also provided on the side of the pin hole 41 on the positioning block 4 . Preferably, the symmetry axis of the U-shaped groove on the positioning block passes through the center of the pin hole.

The technology of the present invention can be used for the interference fit of the pin-hole structure of all plastic parts and metal parts. A U-shaped groove is opened on the pin hole of the plastic part, which improves the toughness of the plastic part and reduces the possibility of cracking of the plastic part. And it also improves the tightness to a certain extent, and improves the stability and safety of the structure.

The present invention still has many specific implementation modes, and all technical solutions formed by adopting equivalent replacement or equivalent transformation all fall within the protection scope of the present invention.

Claims (5)

1. seaming and cutting device, comprise clamp up and down, nail bin and nail anvil about being located at respectively on the clamp, and for the closed described closed handle of clamp up and down, described closed handle is located at described going up on the clamp by pin-and-hole structure pivot, described pin-and-hole and pivotal axis interference fit is characterized in that: offer a U-lag on the described pin-and-hole side.

2. seaming and cutting device according to claim 1, it is characterized in that: the axis of symmetry of described U-lag passes the center of described pin-and-hole.

3. seaming and cutting device according to claim 2, it is characterized in that: described pin-and-hole is hexagon, described U-lag is opened in one of them drift angle place of pin-and-hole.

4. seaming and cutting device according to claim 1 is characterized in that: comprise that one is fixed on the locating piece on the described clamp down, be positioned at pin-and-hole interference ground insertion one alignment pin on the described locating piece, offer a U-lag on the pin-and-hole side on the described locating piece.

5. seaming and cutting device according to claim 4, it is characterized in that: the axis of symmetry of the U-lag on the described locating piece passes the center of described pin-and-hole.

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