Medical plastic tube incision knife

Abstract

The utility model relates to the field of medical instruments, in particular to a medical plastic pipe incision knife. The embodiment of the utility model provides a medical plastic pipe incision knife, which comprises a knife rest, a cutting knife, a linkage knife, a cutting knife, a cutting knife, a linkage knife and a cutting knife, and is characterized in that the knife rest is provided with cutting stations and linkage stations; the cutting face of the blade faces the cutting station, a sliding rail is arranged on the blade, and a linkage pin is arranged on the side, away from the cutting station, of the blade. And the linkage assembly is movably connected with the linkage pin. The tool rest is further provided with a matching pin, the matching pin is arranged between the cutting station and the linkage station, and the matching pin is arranged in the sliding rail. And the linkage pin is arranged in the linkage station. The linkage assembly is arranged, the linkage groove is formed in the tool rest, the linkage assembly is matched with the blade, the sliding rail is arranged on the blade, the blade is matched with the tool rest, and then the linkage assembly slides front and back to drive the blade to be opened or inserted into the cutting station. The whole cutting process is smooth and easy.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a medical plastic tube cutting knife. Background Art

[0002] Endoscopic cutter is a special cutting device used under endoscopy for cutting various plastic tubes including nasobiliary drainage tubes and plastic stents. It has a wide range of clinical uses and can be divided into two categories according to the cutting object: the first category is used for cutting nasobiliary drainage tubes and the second category is used for cutting plastic stents.

[0003] The blades of the incision knife products used in the related art are driven by steel wire hanging, and the overall structure has poor transmission, resulting in large cutting force and continuous cutting. The operation time is prolonged, and the blade may even get stuck in the plastic tube and cannot be opened again, so emergency surgery is the only option. In order to reduce the cutting force, the above-mentioned incision knife usually has to make requirements on the sharpness of the blade, requiring it to be sharper. If the blade is too sharp, there is a risk of cutting the endoscope when the incision knife enters the endoscope clamp hole. The state of the endoscope in the human body is twisted and bent, and the product under the endoscope is also twisted and bent. When the doctor operates the product, the transmission wire in the product is a steel wire structure, and the force cannot be transmitted, which may cause the blade to fail to open, unable to cut, or the tube is just flattened, but the blade is embedded in the tube. Therefore, it is necessary to design a medical plastic tube incision knife. Utility Model Content

[0004] The utility model aims to provide a medical plastic tube cutting knife to solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a medical plastic tube cutting knife, comprising: a knife holder, the knife holder having a cutting station and a linkage station;

[0006] A blade, wherein the cutting surface of the blade faces the cutting station, the blade is provided with a slide rail, and a side of the blade away from the cutting station is provided with a linkage pin;

[0007] a linkage assembly, the linkage assembly being movably connected to the linkage pin; and

[0008] The tool holder also has a matching pin, which is arranged between the cutting station and the linkage station, and is arranged in the slide rail;

[0009] The linkage pin is arranged in the linkage station; wherein

[0010] When the linkage assembly pulls the linkage pin along the linkage station away from the cutting station, the blade rotates around the linkage pin through the linkage station so that the cutting surface of the blade is inserted into the cutting station.

[0011] Further, the linkage assembly includes a pull rod and at least one connecting rod;

[0012] One end of the connecting rod is hinged to the pull rod, and the other end is hinged to the linkage pin.

[0013] Furthermore, a linkage groove is provided on the tool holder to form the linkage station;

[0014] The linkage groove is inclined upward in a direction away from the cutting station.

[0015] Furthermore, a hook-shaped groove is provided on the tool holder to form the cutting station.

[0016] Furthermore, the cutting knife also includes a handle assembly and an outer tube, one end of the outer tube is connected to the handle assembly, and the other end is inserted into the rear end of the knife holder;

[0017] The linkage assembly is slidably disposed in the outer tube.

[0018] Furthermore, a cable is slidably arranged inside the outer tube, and the linkage assembly is connected to the cable.

[0019] Furthermore, the handle assembly includes a handle and an operating block, the handle is provided with a driving groove along the length direction, and the operating block is slidably disposed in the driving groove;

[0020] The end of the pull cable is connected to the operating block.

[0021] Furthermore, at least one buckle ring is provided on the operating block.

[0022] Compared with the prior art, the embodiments of the utility model have the following beneficial effects: by setting a linkage component, setting a linkage groove on the knife holder, making the linkage component cooperate with the blade, setting a slide rail on the blade, making the blade cooperate with the knife holder, and then making the linkage component slide back and forth to drive the blade to open or insert into the cutting station. The overall cutting process is smooth and easy. The cutting knife is light as a whole and has a small cutting force. Through the hook-shaped groove, the pipe can be quickly positioned under the twisting of the endoscope, and the blade can be opened and the pipe can be easily cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 The structure diagram of the medical plastic tube cutting knife of the utility model is shown;

[0025] Figure 2 A side view of the tool holder of the utility model is shown;

[0026] Figure 3 A schematic diagram showing the open state of the tool holder of the utility model is shown;

[0027] Figure 4 A cross-sectional view of the tool holder of the utility model in an open state is shown;

[0028] Figure 5 A top view of the tool holder of the present invention is shown.

[0029] In the figure:

[0030] 1. Tool holder; 11. Matching pin; 12. Linkage groove; 13. Hook groove;

[0031] 2. Blade; 21. Slide rail; 22. Linkage pin;

[0032] 3. linkage assembly; 31. tie rod; 32. connecting rod;

[0033] 41. handle; 42. operating block; 43. drive slot; 44. buckle ring;

[0034] 5. Outer tube; 51. Cable. DETAILED DESCRIPTION

[0035] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0036] Examples, such as Figure 1 As shown, in some embodiments, a medical plastic tube cutting knife is provided, comprising: a handle assembly, a knife holder 1 and an outer tube 5, wherein the outer tube 5 is a flexible hose with a circular cross-section, and both ends of the outer tube 5 are respectively connected to the handle assembly and the knife holder 1.

[0037] It should be noted that the outer tube 5 is provided to facilitate medical staff to extend the knife holder 1 into the patient's body. The incision knife products used in the related art are driven by the steel wire hanging method, and the overall structure has poor transmission, resulting in large cutting force and continuous cutting. The operation time is extended, and the blade may even get stuck in the plastic tube and cannot be opened again, so emergency surgery can only be performed. In order to reduce the cutting force, the above-mentioned incision knife usually has to make requirements on the sharpness of the blade, requiring it to be sharper. If the blade is too sharp, there is a risk of cutting the endoscope when the incision knife enters the endoscope clamp hole. The state of the endoscope in the human body is twisted and bent, and the product under the endoscope is also twisted and bent. When the doctor operates the product, the transmission wire in the product is a steel wire structure, and the force cannot be transmitted, which may cause the knife head to be unable to open, cut, or just flatten the pipe, but the blade is embedded in the pipe.

[0038] In order to solve the above problems, in some embodiments, Figure 2 As shown, a blade 2 and a linkage assembly 3 are provided on the tool holder 1, and the tool holder 1 has a cutting station and a linkage station. The tool holder 1 also has a matching pin 11, and the matching pin 11 is arranged between the cutting station and the linkage station. The linkage assembly 3 is slidably arranged in the outer tube 5. One side of the blade 2 has a cutting edge, that is, a cutting surface, and the cutting surface of the blade 2 faces the cutting station, and the blade 2 can be moved to be inserted into the cutting station. The blade 2 has a slide rail 21, and the matching pin 11 is arranged in the slide rail 21. The side of the blade 2 away from the cutting station has a linkage pin 22. The linkage assembly 3 is movably connected with the linkage pin 22, and the linkage pin 22 is arranged in the linkage station. Through the above arrangement, when the linkage assembly 3 pulls the linkage pin 22 away from the cutting station along the linkage station, the blade 2 rotates around the linkage pin 22 through the linkage station, so that the cutting surface of the blade 2 is inserted into the cutting station, so that the cutting surface cuts the pipe placed inside the cutting station. In some embodiments, the tubing refers to medical plastic tubing.

[0039] In at least one embodiment, Figure 3 As shown, the tool holder 1 is provided with a linkage groove 12 to form the linkage station. The linkage groove 12 is tilted upward in a direction away from the cutting station. When the blade 2 is in the open state, the head of the blade 2, i.e., the end corresponding to the cutting station, is tilted upward, and the tail of the blade 2 is located at the bottom of the linkage groove 12. When the linkage assembly 3 pulls the linkage pin 22 of the blade 2, the linkage pin 22 moves away from the cutting station along the linkage groove 12 and is lifted upward, thereby causing the head of the blade 2 to rotate downward around the matching pin 11 along the slide rail 21 until the blade 2 is inserted into the cutting station.

[0040] In at least one embodiment, a hook-shaped groove 13 is provided on the knife holder 1 to form the cutting station. The bottom of the hook-shaped groove 13 is arc-shaped, and the opening direction of the hook-shaped groove 13 faces the blade 2, so that medical staff can buckle the circular tube into the hook-shaped groove 13. The hook-shaped groove 13 provides radial support for the tube, so that the tube is not easy to fall off. At the same time, because the opening direction of the hook-shaped groove 13 faces the blade 2, when the blade 2 is rotated and inserted into the hook-shaped groove 13, the force direction is opposite, which reduces the force loss and can cut the tube more easily.

[0041] In order to realize that when the linkage assembly 3 pulls the linkage pin 22 of the blade 2, the linkage pin 22 can rotate along the linkage groove 12, and the blade 2 rotates around the matching pin 11 through the slide rail 21, in at least one embodiment, as Figure 4As shown, the linkage assembly 3 includes a pull rod 31 and at least one connecting rod 32, preferably two. One end of the connecting rod 32 is hinged to the pull rod 31, and the other end is hinged to the linkage pin 22. A circular hole is opened at the rear of the tool holder 1, and the pull rod 31 is slidably arranged in the circular hole. Figure 5 As shown, when the pull rod 31 moves away from the hook-shaped groove 13 along the circular hole, the pull rod 31 can pull the connecting rod 32, and the connecting rod 32 drives the linkage pin 22 of the blade 2 to slide along the linkage groove 12. Then, due to the inclined sliding of the tail end of the blade 2, the blade 2 rotates along the matching pin 11 through the slide rail 21. Through the above arrangement, the pull rod 31 can slide back and forth along the circular hole, which can drive the blade 2 to open or close.

[0042] In some embodiments, the handle assembly includes a handle 41 and an operating block 42, wherein the handle 41 is provided with a driving groove 43 along the length direction, and the operating block 42 is slidably arranged in the driving groove 43. In order to further achieve the effect of controlling the pull rod 31 to slide forward and backward along the round hole at the position of the handle assembly, a cable 51 is slidably arranged in the outer tube 5, and the linkage assembly 3 is connected to the cable 51. The end of the cable 51 is connected to the operating block 42. Through the above arrangement, when the operator drives the operating block 42 to slide along the driving groove 43, the cable 51 can be driven to slide forward and backward, thereby achieving the effect of the cable 51 driving the pull rod 31 to slide forward and backward. In order to facilitate the medical staff to accurately control the operating block 42, at least one buckle 44 is arranged on the operating block 42. The fingers of the medical staff can be inserted into the buckle 44 to stably hold the operating block 42, thereby accurately controlling the movement of the operating block 42. The cutting knife is light as a whole, and the hook-shaped groove can quickly locate the pipe under the endoscope to effectively reduce the cutting force, and the blade can also be opened to easily cut the pipe.

[0043] It is worth mentioning that the technical features such as other components involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.

[0044] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A medical plastic tube cutting knife, characterized in that: include: A tool holder (1), wherein the tool holder (1) has a cutting station and a linkage station; A blade (2), wherein the cutting surface of the blade (2) faces the cutting station, the blade (2) is provided with a slide rail (21), and a side of the blade (2) away from the cutting station is provided with a linkage pin (22); A linkage component (3), the linkage component (3) being movably connected to the linkage pin (22); and The tool holder (1) also has a matching pin (11), the matching pin (11) is arranged between the cutting station and the linkage station, and the matching pin (11) is arranged in the slide rail (21); The linkage pin (22) is arranged in the linkage station; wherein When the linkage assembly (3) pulls the linkage pin (22) along the linkage station away from the cutting station, the blade (2) rotates around the linkage pin (22) through the linkage station, so that the cutting surface of the blade (2) is inserted into the cutting station.

2. The medical plastic tube cutter according to claim 1, characterized in that: The linkage assembly (3) comprises a pull rod (31) and at least one connecting rod (32); One end of the connecting rod (32) is hinged to the pull rod (31), and the other end is hinged to the linkage pin (22).

3. The medical plastic tube cutter according to claim 1, characterized in that: The tool holder (1) is provided with a linkage groove (12) to form the linkage workstation; The linkage groove (12) is inclined upward in a direction away from the cutting station.

4. The medical plastic tube cutter according to claim 1, characterized in that: The tool holder (1) is provided with a hook-shaped groove (13) to form the cutting station.

5. The medical plastic tube cutter according to claim 1, characterized in that: The cutting knife further comprises a handle assembly and an outer tube (5), one end of the outer tube (5) being connected to the handle assembly and the other end being inserted into the rear end of the knife holder (1); The linkage assembly (3) is slidably arranged inside the outer tube (5).

6. The medical plastic tube cutter according to claim 5, characterized in that: A cable (51) is slidably disposed inside the outer tube (5), and the linkage assembly (3) is connected to the cable (51).

7. The medical plastic tube cutter according to claim 6, characterized in that: The handle assembly comprises a holding handle (41) and an operating block (42); the holding handle (41) is provided with a driving groove (43) along the length direction, and the operating block (42) is slidably disposed in the driving groove (43); An end of the pull cable (51) is connected to the operating block (42).

8. The medical plastic tube cutter according to claim 7, characterized in that: At least one buckle ring (44) is provided on the operating block (42).

Images