A stapler cutting knife

Abstract

The present invention discloses a stapler cutting knife, the blade of which is formed by bending a superelastic alloy wire. The superelastic alloy wire adopts a symmetrical folding structure, and the folding part thereof is bent into a dovetail-shaped protrusion matching the dovetail-shaped groove at the end of the blade head, and the middle part of the blade body includes a plurality of U-shaped structures formed by bending the superelastic alloy wire inward. A thin film pressure sensor is provided at the blade head of the cutting knife. The cutting knife head includes a blade body and a blade embedded in the groove at the front end thereof, and the upper and lower ends of the blade body are respectively provided with protective eaves, and the thin film pressure sensors are respectively arranged on the inner side of the protective eaves. The present invention greatly reduces the cross-sectional area of ​​the blade body and reduces the resistance and friction during the movement by changing the structure and processing method of the cutting knife blade body. The pressure detection of the pressure sensor can also provide mechanical feedback information to the user in a timely manner, so that the user can better control the operation speed and improve the reliability of the stapler.

Description

Technical Field

[0001] The present invention relates to the technical field of clinical instruments, in particular to a stapler cutting knife. Background Art

[0002] The stapler cutting knives currently available on the market include integrated knives and split knives. Among them, the split knife consists of a knife head and a cutting knife body. For example, the applicant has previously applied for a patent with application number 201621316095.9, and the application name is a cutting knife for laparoscopic staplers, in which the knife head is fixedly connected to other parts by rigid surface contact through a fixed "I" spacing of the knife head. The knife head is machined or punched out of sheet metal, and the cutting knife body is machined or punched out of sheet metal. During use, multiple pieces of cutting knife blades are stacked and used, and the functions of the cutting knife moving forward, backward, and turning left and right are realized through the elastic bending, deformation and recovery of the multiple pieces of cutting knife blades. The knife head in rigid surface contact will produce a large reaction force and friction. In addition, during the use of the stapler cutting knife, the user cannot perceive the actual state of the force. The stacking of multiple pieces of cutting knife blades also increases the contact area, and also increases the resistance of the movement process, affecting the user's experience and effect.

[0003] It can be seen that the above-mentioned existing stapler cutting knife still has inconveniences and defects in structure, method and use, and needs to be further improved. How to create a new stapler cutting knife that can sense the pressure at the knife head in time, facilitate the user's operation, or reduce the movement resistance of the cutting knife, which is convenient to use, has become a goal that the industry needs to improve. Summary of the invention

[0004] The present invention provides a stapler cutting knife, which can reduce the movement resistance of the cutting knife when in use, is convenient to operate and use, and overcomes the disadvantage of large movement resistance of the existing stapler cutting knife.

[0005] In order to solve the above technical problems, the present invention provides a stapler cutting knife, comprising a knife head and a knife body connected thereto, wherein the knife body is formed by bending a superelastic alloy wire.

[0006] As an improvement of the present invention, the superelastic alloy wire adopts a symmetrical folded structure, the folded part forms the front end of the blade body connected to the end of the blade head, and the two ends of the superelastic alloy wire form the ends of the blade body.

[0007] As a further improvement, a dovetail groove is provided at the end of the cutter head, and the folded portion of the superelastic alloy wire is bent into a dovetail protrusion matching the dovetail groove.

[0008] As a further improvement, the middle portion of the blade body includes a plurality of U-shaped structures formed by inward bending of the superelastic alloy wire.

[0009] As a further improvement, a pressure sensor is provided on the blade head of the cutting blade.

[0010] As a further improvement, the pressure sensor is a thin film pressure sensor.

[0011] Further improvement, the cutter head includes a cutter head body and a blade embedded in the groove at the front end of the cutter head body, the upper and lower ends of the cutter head body are respectively provided with protective eaves, the thin film pressure sensors are respectively arranged on the inner sides of the protective eaves, and the protective eaves are provided with through holes for passing the data connection line of the thin film pressure sensor.

[0012] In addition, the technical problem that the present invention aims to solve is to provide a stapler cutting knife that can sense the pressure at the knife head in time, making it easier for users to operate, thereby overcoming the defect that the existing stapler cannot sense the actual state of force during use.

[0013] In order to solve the above technical problems, the present invention provides a stapler cutting knife, wherein the cutting head of the cutting knife is provided with a pressure sensor.

[0014] As a further improvement, the pressure sensor is a thin film pressure sensor.

[0015] Further improvement, the blade head of the cutting knife includes a blade head body and a blade embedded in the groove at the front end of the blade head body, the upper and lower ends of the blade head body are respectively provided with protective eaves, the thin film pressure sensors are respectively arranged on the inner sides of the protective eaves, and the protective eaves are provided with through holes for passing the data connection line of the thin film pressure sensor.

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

[0017] 1. The present invention changes the structure and processing method of the cutting knife blade, thereby changing the traditional multi-piece cutting knife blade stacking structure formed by sheet metal punching to a structure formed by bending a single superelastic alloy wire, thereby greatly reducing the cross-sectional area of ​​the blade and reducing the resistance and friction during movement.

[0018] 2. The present invention also provides a plurality of U-shaped structures formed by inward bending of the superelastic alloy wire in the middle of the blade, thereby greatly improving the buffering effect of the blade during compression or stretching, and improving the reliability of the cutting knife.

[0019] 3. The present invention has built-in pressure sensors on both sides of the cutter head. The pressure detection of the pressure sensors can provide mechanical feedback to the user in a timely manner, allowing the user to properly control the speed of the operation according to the mechanical feedback data, thereby further improving the reliability of the cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a structural schematic diagram of the stapler cutting knife with a built-in sensor device of the present invention.

[0022] Figure 2 yes Figure 1 Cross-sectional view along line AA. DETAILED DESCRIPTION

[0023] The present invention is an improvement on the existing stapler cutting knife, and the specific improvements are as follows.

[0024] Refer to the attached Figure 1 and 2 As shown, the stapler cutting knife of this embodiment is a split structure, including a knife head 10 and a knife body 11 connected thereto. The knife head 10 includes a knife head body and a blade 13 embedded in the groove at the front end of the knife head body, and the rear end of the knife head body is connected to the front end of the knife body 11. It should be pointed out that the front end in this application refers to the end of the stapler extending toward the tissue to be cut and sutured, and the rear end refers to the end close to the user's operating handle. The expressions of the front end and the rear end are only used to make the description concise and clear, and should not be understood as any limitation on the structure of the cutting knife.

[0025] In this embodiment, the blade 11 is formed by bending a single superelastic alloy wire, and the alloy wire can be made of an alloy wire material with a circular or polygonal cross section. Specifically, the superelastic alloy wire adopts a symmetrical folding structure, and the folding portion forms the front end of the blade 11 and is connected to the end of the blade head. The two ends 113 of the superelastic alloy wire are open and arranged opposite to each other to form the end of the blade.

[0026] A preferred embodiment is that a dovetail groove 101 is provided at the end of the cutter head 10, and the folded portion of the superelastic alloy wire is bent into a dovetail protrusion 111 matching the dovetail groove 101, and the dovetail groove 101 and the dovetail protrusion 111 are fixedly connected by interference fit, bonding or welding.

[0027] A more preferred embodiment is that the middle portion of the blade body 11 further includes a plurality of U-shaped structures 112 formed by inward bending of the superelastic alloy wire, as shown in the attached Figure 1 As shown, the blade body includes three pairs of symmetrically arranged U-shaped structures 112. In this way, when a certain push-pull force is applied to the tail 113 of the cutting blade body, the U-shaped structure 112 can provide a greater buffering effect during compression or tension, thereby improving the reliability of the cutting blade.

[0028] As a further improvement, in this embodiment, a pressure sensor is provided at the blade head 10 of the cutting knife for timely detecting the force state of the blade head when the stapler is in use, so as to facilitate the user to control the operating speed of the stapler according to the force feedback information.

[0029] In this embodiment, the pressure sensor is a thin film pressure sensor 12. The upper and lower ends of the cutter head body are respectively provided with arc-shaped protective eaves 14. The thin film pressure sensor 12 is respectively arranged on the inner side of the protective eaves 14 by embedding or bonding, and the protective eaves 14 are provided with a through hole for passing the data connection line 122 of the thin film pressure sensor 12, so that the cutter head structure is compact and occupies little space.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art may make some simple modifications, equivalent changes or modifications using the technical contents disclosed above, which all fall within the protection scope of the present invention.

Claims

1. A stapler cutting knife, comprising a knife head and a knife body connected thereto, characterized in that: The blade is formed by bending superelastic alloy wire; The superelastic alloy wire adopts a symmetrical folded structure, the folded part forms the front end of the blade body and is connected to the end of the blade head, and the two ends of the superelastic alloy wire form the ends of the blade body; The middle part of the blade body includes a plurality of U-shaped structures formed by inward bending of the superelastic alloy wire.

2. The stapler cutting knife according to claim 1, characterized in that: A dovetail groove is provided at the end of the cutter head, and the folded portion of the superelastic alloy wire is bent into a dovetail protrusion matching the dovetail groove.

3. The stapler cutting knife according to claim 1 or 2, characterized in that: The cutter head of the cutting knife is provided with a pressure sensor.

4. The stapler cutting knife according to claim 3, characterized in that: The pressure sensor is a thin film pressure sensor.

5. The stapler cutting knife according to claim 4, characterized in that: The cutter head includes a cutter head body and a blade embedded in a groove at the front end of the cutter head body. The upper and lower ends of the cutter head body are respectively provided with protective eaves. The thin film pressure sensors are respectively arranged on the inner sides of the protective eaves. The protective eaves are provided with through holes for passing the data connection line of the thin film pressure sensor.

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