Pipe cutter with blade capable of being replaced quickly

Abstract

The utility model discloses a pipe cutter with a quick-changing blade, and relates to the technical field of pipe cutting tools, a shell comprises a shell body and an arc-shaped connecting rod, the root of the arc-shaped connecting rod is elastically connected to the shell body, the arc-shaped connecting rod is connected with a blade part in an inserted mode, and the blade part is located in the shell body and matched with the shell body in an inserted mode. A blade positioning column and a blade guide column are arranged in the shell body; the blade part comprises a blade body, a positioning groove and a guide hole are formed in the blade body, the positioning groove and the positioning column are clamped and fixed, the blade guide column is in sliding fit with the guide hole, and the positioning groove and the blade positioning column are symmetrically arranged relative to the blade guide column and the guide hole in position and structure. According to the guide pipe cutting device, notches with multiple specifications and pipe diameters are controlled, the risk that the notches are uneven is reduced, the direction of the internal blades can be changed, the multiple lengths of the blades are fully used, the service life of the blades and the guide pipe cutting device is prolonged, and the blades are more convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of tube cutting tools, in particular to a tube cutter with a quick-change blade. Background Art

[0002] A catheter cutter is a tool specifically designed for cutting or trimming various types of catheters, such as medical catheters and industrial hoses. Currently, most catheter cutters on the market are rectangular or circular in shape, and typically utilize internal springs or torsion springs to return the blades. This results in a poor, mechanical feel and a heavy, non-soft feel when pressed. Existing products often lack finger rests and anti-slip features, making them difficult to grip. Some are also bulky and inconvenient. Some products only have a single hole for cutting, limiting the size of the cut. Using a large hole to cut thin tubing can easily result in uneven cuts, leading to catheter failure. Some catheter cutters also have complex structures, with internal springs and torsion springs prone to misalignment or rust, leading to product failure. Furthermore, the high precision of component alignment during assembly makes assembly difficult and increases production costs. Furthermore, the internal blades wear out easily due to repeated use, shortening the lifespan of the catheter cutter.

[0003] For example, the patent with the publication (announcement) number CN213731906U is named as a tube cutter for disposable sterile peripherally inserted central venous catheter sets. The lower part of the tube cutter is provided with multiple cutting channels of different sizes for inserting catheters of different sizes. The cutting blade is arranged in the blade gap in the box body and is rotatably connected to the horizontal axis. The torsion spring gives the cutting blade an upward rebound force. The top pressure column slides downward in the sliding cavity to provide a downward cutting force for the cutting blade. The blade at the front end of the cutting blade moves downward to cut the catheter in the lower cutting channel. After the cutting is completed, the cutting blade automatically rebounds upward and leaves the cutting channel.

[0004] For example, the patent with the publication (announcement) number CN221314284U is named as a medical catheter cutting device, which includes a catheter limiting plate, an arc-shaped connecting rod and a blade. The catheter to be cut is positioned using the catheter hole on the catheter limiting plate so that the catheter can be stably located in the catheter hole. Then the medical staff holds the arc-shaped connecting rod and presses down, so that the blade moves in the vertical direction without deviation. The blade cuts the catheter in the catheter hole, ensuring that the catheter cut by the blade is flat and smooth, avoiding damage to the patient's blood vessels during the catheter insertion process. Utility Model Content

[0005] Technical problems to be solved by utility models

[0006] In response to the technical problems that existing catheter cutters only have single-hole cutting, single size, and short service life, the utility model provides a quick-change blade tube cutter, which controls the cutting of multiple specifications of tube diameters, reduces the risk of uneven cutting, and the internal blade can be replaced in direction to fully utilize the multiple lengths of the blade, thereby increasing the service life of the blade and the catheter cutter, and making blade replacement more convenient.

[0007] Technical Solution

[0008] In order to solve the above problems, the technical solution provided by the present invention is:

[0009] A quick-change blade tube cutter includes a shell, a shell body and an arc-shaped connecting rod, the root of the arc-shaped connecting rod is elastically connected to the shell body, the arc-shaped connecting rod is plugged with a blade component, the blade component is located inside the shell body and is plugged in, and a blade positioning column and a blade guide column are provided in the shell body; the blade component includes a blade body, and a positioning groove and a guide hole are provided on the blade body, the positioning groove is engaged and fixed with the positioning column, and the blade guide column is slidably matched with the guide hole, and the position and structure of the positioning groove and the blade positioning column are symmetrically arranged with respect to the blade guide column and the guide hole.

[0010] The position and structure of the positioning groove and the blade positioning post are symmetrically arranged with respect to the blade guide post and the guide hole. The blade can be flipped over for use, utilizing different parts of the blade edge. This allows full utilization of every part of the blade and extends the service life of the blade. The structure inside the housing is simplified, and the blade installation and disassembly methods are optimized, making blade replacement quick and easy, reducing work interruption time caused by blade replacement. The elastically connected arc-shaped connecting rod provides power for resetting the blade assembly. The cooperation between the blade positioning post and the positioning groove ensures that the blade is installed in the correct position, avoiding inaccurate cutting caused by position offset. The sliding cooperation between the blade guide post and the guide hole ensures the stability of the blade during movement, which helps to achieve straight cutting.

[0011] Optionally, the guide hole is a waist-shaped hole, and the length direction of the guide hole is parallel to the elastic movement direction of the arc-shaped connecting rod.

[0012] The waist-shaped hole design allows the blade to move freely within a certain range, increasing the flexibility of the blade movement. When the arc-shaped connecting rod extends or contracts, the blade guide column of the blade can move accordingly in the waist-shaped hole, ensuring the stability of the blade during cutting.

[0013] Optionally, the shell body is provided with a plurality of catheter cutting holes of different diameters.

[0014] The housing is equipped with multiple conduit cutting holes of varying diameters to accommodate conduits of varying diameters. Each cutting hole has a specific diameter, ensuring optimal support and stability when cutting conduits of corresponding diameters.

[0015] Optionally, a tapered guide surface is provided in the catheter cutting hole.

[0016] The conduit cutting hole is provided with a tapered guide surface, which gradually narrows from the hole opening inward. The design of the tapered guide surface makes it easier to insert the conduit into the cutting hole and can automatically align the conduit.

[0017] Optionally, the top of the arc-shaped connecting rod is provided with an upper anti-slip groove.

[0018] The top of the arc-shaped connecting rod is provided with an upper anti-slip groove, which is a horizontal or vertical groove or protrusion, and is used to increase the friction between the hand and the top of the arc-shaped connecting rod.

[0019] Optionally, the bottom of the shell is provided with lower anti-slip grooves.

[0020] Used to increase the friction between the hand and the bottom of the arc connecting rod.

[0021] Optionally, the blade component is provided with a side protective shell, and the side protective shell is engaged with the side surface of the blade body.

[0022] The side guards effectively prevent the blade from accidentally scratching the operator's fingers or other parts during use. They provide an additional safety barrier when changing blades or performing other maintenance, reducing the risk of injury. The side guards also increase the blade's overall rigidity, making it more stable during cutting and reducing vibration and wiggle. This stability improves cutting accuracy and quality.

[0023] Optionally, outer surfaces of the shell body and the arc-shaped connecting rod are provided with rounded corner structures.

[0024] The outer surfaces of the housing and curved connecting rod are designed with rounded corners, eliminating sharp angles and adopting smooth, curved transitions. This rounded design effectively reduces accidental scratches and collisions that can damage hands and other parts of the body during use. Smooth edges provide enhanced protection, especially during rapid operation or emergencies.

[0025] Beneficial effects

[0026] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0027] The technical solution provided by the utility model includes a housing, which includes a housing body and an arc-shaped connecting rod. The base of the arc-shaped connecting rod is elastically connected to the housing body. The arc-shaped connecting rod is plugged into a blade component, which is located inside the housing body and plugged into the housing body. The housing body is provided with a blade positioning post and a blade guide post. The blade component includes a blade body, which is provided with a positioning groove and a guide hole. The positioning groove is fixedly engaged with the positioning post. The blade guide post slides with the guide hole. The positioning groove and the blade positioning post are symmetrically positioned and structured relative to the blade guide post and the guide hole. The utility model controls the cutting of various pipe diameters, reduces the risk of uneven cutting, and the internal blade can be changed in direction to fully utilize the multiple lengths of the blade edge, thereby extending the service life of the blade and the catheter cutter, and making blade replacement more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a quick-change blade tube cutter according to an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a half of a quick-change blade tube cutter according to an embodiment of the present invention;

[0030] Figure 3 A cross-sectional view of a catheter cutting hole of a quick-change blade tube cutter according to an embodiment of the present invention;

[0031] Figure 4 A cutting diagram of a quick-change blade tube cutter proposed in an embodiment of the present utility model;

[0032] 1. Housing; 111. Blade positioning post 1; 112. Blade guide post; 113. Blade positioning post 2; 12. Catheter cutting hole; 13. Guide surface; 2. Arc-shaped connecting rod; 3. Blade component; 31. Side protective shell; 32. Guide hole; 33. Positioning groove 1; 34. Positioning groove 2; 4. Upper anti-slip groove; 5. Lower anti-slip groove; 6. Elastic bending part. DETAILED DESCRIPTION

[0033] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] Combined with attachment Figure 1-4 A quick-change blade tube cutter includes a housing 1 and a blade component 3, which cooperate with each other to cut the tube.

[0036] Combined with attachment Figure 2The shell 1 includes a shell body 1 and an arc-shaped connecting rod 2. The root of the arc-shaped connecting rod 2 is elastically connected to the shell body 1. The arc-shaped connecting rod 2 is plugged with a blade component 3. The blade component 3 is located inside the shell body 1 and is plugged in. A blade positioning column and a blade guide column 112 are provided in the shell body 1. The shell 1 is a structure that is split in the middle. The edges of the two halves are provided with multiple connecting columns. Screws are fixed in the connecting columns for fastening. The root of the arc-shaped connecting rod 2 is an arc-shaped rod that is thinner than other parts to improve the elasticity. A plurality of reinforcing ribs are provided inside the shell body 1. Protruding structures such as the blade positioning column and the blade guide column 112 extend from the reinforcing ribs for easy processing. The root of the arc-shaped connecting rod 2 is an elastic bending portion 6. The blade positioning column includes a blade positioning column 1 111 and a blade positioning column 2 113.

[0037] The blade component 3 includes a blade body, which is provided with a positioning groove and a guide hole 32. The positioning groove is fixed with the positioning column, and the blade guide column 112 is slidably matched with the guide hole 32. The position and structure of the positioning groove and the blade positioning column are symmetrically arranged with respect to the blade guide column 112 and the guide hole 32. The structure of the guide hole 32 and the blade guide column 112 is located in the middle of the blade body, which is convenient for flipping the left and right sides and replacing the blade edges on both sides. Through effective management and reasonable use of the blade, not only the wear frequency of the blade can be reduced, but also the replacement frequency can be reduced, saving costs. The positioning groove includes positioning groove 1 33 and positioning groove 2 34. The blade positioning column 111 is fixed with the positioning groove 1 33, and the blade positioning column 2 113 is fixed with the positioning groove 2 34.

[0038] The guide hole 32 is a waist-shaped hole, and the length direction of the guide hole 32 is parallel to the elastic movement direction of the arc-shaped connecting rod 2.

[0039] Combined with attachment Figure 3 The housing 1 is provided with a plurality of catheter cutting holes 12 of different diameters. In this embodiment, three catheter cutting holes 12 are provided, and their sizes are important control sizes, with diameters of 1.75±0.15mm, 1.4±0.15mm, and 1.05±0.15mm, respectively.

[0040] A tapered guide surface 13 is provided in the hole of the catheter cutting hole 12. The guide surface 13 is provided on both sides of the catheter cutting hole 12, and both sides of the tube cutter can enter the catheter for cutting.

[0041] The blade component 3 is provided with a side protection shell 31, which is engaged with the side of the blade body. The side protection shell 31 is a long plastic piece used to protect people's hands from being scratched by the blade.

[0042] The outer surfaces of the housing 1 and the curved connecting rod 2 feature rounded corners. The bottom of the housing 1 also features a recessed area that conforms to the ergonomic curve of the human hand. This recessed area allows fingers to fit naturally within the recess, providing a secure grip. The top of the curved connecting rod 2 also conforms to the ergonomic curve of the human hand, providing a more stable grip. Upper anti-slip grooves 4 are located on the top of the curved connecting rod 2. Lower anti-slip grooves 5 are located on the bottom of the housing 1.

[0043] This application realizes low-cost production under the premise of meeting the functional requirements of the product, increases the labor-saving degree when cutting flexible conduits, and can also avoid the addition of retaining springs, thereby increasing reliability. It also controls the incision of multiple specifications of pipe diameters to reduce the risk of uneven incisions. This application does not involve redundant accessories, and is combined with the attached Figure 4 When using, just insert the target catheter into the cutting hole of the corresponding size, and press the arc-shaped connecting rod 2 with a blade to cut the catheter.

[0044] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A quick-change blade cutter, characterized in that: include The housing comprises a housing body and an arc-shaped connecting rod, wherein the base of the arc-shaped connecting rod is elastically connected to the housing body, the arc-shaped connecting rod is plugged with a blade component, the blade component is located inside the housing body and plugged in, and a blade positioning column and a blade guide column are provided in the housing body; The blade component includes a blade body, which is provided with a positioning groove and a guide hole. The positioning groove is fixed with the positioning column, and the blade guide column is slidably matched with the guide hole. The position and structure of the positioning groove and the blade positioning column are symmetrically arranged with respect to the blade guide column and the guide hole.

2. The quick-change blade tube cutter according to claim 1, characterized in that: The guide hole is a waist-shaped hole, and the length direction of the guide hole is parallel to the elastic movement direction of the arc-shaped connecting rod.

3. The quick-change blade tube cutter according to claim 1, characterized in that: The shell body is provided with a plurality of catheter cutting holes with different diameters.

4. The quick-change blade tube cutter according to claim 3, characterized in that: A tapered guide surface is provided in the catheter cutting hole.

5. The quick-change blade tube cutter according to claim 1, characterized in that: The top of the arc-shaped connecting rod is provided with an upper anti-slip pattern.

6. The quick-change blade tube cutter according to claim 1, characterized in that: The bottom of the shell is provided with lower anti-slip grooves.

7. The quick-change blade tube cutter according to claim 1, characterized in that: The blade component is provided with a side protection shell, and the side protection shell is engaged with the side surface of the blade body.

8. The quick-change blade tube cutter according to claim 1, characterized in that: The outer surfaces of the shell body and the arc-shaped connecting rod are provided with rounded corner structures.

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