Cutting knife
By designing a V-shaped blade and a cutter driven by a movable handle, the problem of low cutting efficiency of PVC pipes was solved, achieving a labor-saving and efficient cutting effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-17
AI Technical Summary
In the existing technology, PVC pipe cutting is inefficient, requires a lot of force and is time-consuming and laborious, and there is a lack of special cutting tools.
A cutting tool was designed with a V-shaped blade. The blade and the support form a receiving groove. The blade can move relative to the fixed handle. The movable handle moves the blade closer to or away from the support. During the cutting process, only two cutting points need to be applied, with the included angle α between 145° and 165°, ensuring the stability of the cutting points and saving effort.
It improves the efficiency and labor-saving of PVC pipe cutting, avoiding the labor-intensive problems caused by three-point or more cutting in traditional cutting methods, making the cutting process more convenient and efficient.
Smart Images
Figure CN223998475U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cutting tool technology, and in particular to a cutter for cutting PVC pipes. Background Technology
[0002] PVC pipes are usually manufactured with fixed length specifications. However, due to the complexity and diversity of the application scenarios, the required length of the pipes varies during installation and use. Therefore, the pipes need to be cut before use.
[0003] Traditional pipe cutting methods lack specialized tools, often relying on cutting tools directly. However, this is time-consuming and labor-intensive. To address this, a pipe cutter was proposed that uses the user's hand to clamp the pipe and gradually cut it. However, this method is relatively expensive, requires significant force, and has low cutting efficiency. Utility Model Content
[0004] Therefore, it is necessary to provide a cutting tool that improves cutting efficiency.
[0005] This application provides a cutting tool, including a fixed handle with a support portion; a blade disposed on the fixed handle and arranged to move toward or away from the support portion; a receiving groove with a front opening for a cutting element to enter is formed between the blade and the support portion; a V-shaped cutting edge is formed on the side of the blade facing the support portion, and the tip of the cutting edge faces the support portion.
[0006] In one embodiment, the support is a groove with an opening facing the blade.
[0007] In one embodiment, the fixed handle has a cavity, and the fixed handle has a slot communicating with the cavity. Part of the slot is located on the support. A rotating shaft is provided in the cavity. Part of the blade is inserted into the cavity from the slot and mounted on the rotating shaft.
[0008] The aforementioned slot allows the blade to extend out of the slot when it rotates upward relative to the fixed handle. When the blade rotates downward relative to the fixed handle, the cutting edge of the blade can be at least partially concealed within the slot.
[0009] In one embodiment, the cutter further includes a movable handle for moving the blade toward or away from the support, the first end of the movable handle being rotatably connected to the fixed handle, and the movable handle being connected to the blade via a transmission assembly.
[0010] In one embodiment, the cutting element is a PVC pipe, and the contact point where the blade contacts the wall of the PVC pipe is the cutting point. There are two cutting points, spaced apart along the length of the blade. Thus, during the cutting process, the presence of two cutting points means that force only needs to be applied to these two points, making cutting more effortless and avoiding the problem of excessive cutting effort associated with three or more cutting points.
[0011] In one embodiment, the cutting edge includes a first cutting segment and a second cutting segment connected sequentially from front to back. The junction of the first and second cutting segments is the tip. The included angle between the first and second cutting segments is α, which satisfies the condition: 145° ≤ α ≤ 165°. Thus, by using the aforementioned range of included angle α, the cutting edge has two cutting points with the PVC pipe wall during the cutting process, avoiding the problem of increased cutting effort caused by three or more cutting points.
[0012] In one embodiment, the included angle α is 155°.
[0013] In one embodiment, the length of the first cutting segment is greater than the length of the second cutting segment.
[0014] In one embodiment, the first cutting edge has two first sides that gradually slope away from each other from front to back along its own thickness direction, and the second cutting edge has two second sides that gradually slope away from each other from back to front along its own thickness direction. The rear end of the first side is connected to the front end of the corresponding second side. This ensures the strength of the tip, allowing for more reliable cutting through the PVC pipe wall during the initial cut.
[0015] In one embodiment, the thickness of the PVC pipe is 1.73 mm to 3.91 mm, and the outer diameter of the PVC pipe is 10.29 mm to 60.32 mm.
[0016] Compared with the prior art, the cutter provided in this application adopts a V-shaped blade. During the cutting process, the tip first pierces the workpiece, and then the blade is rotated to continuously cut the workpiece from the piercing point. The whole cutting process is convenient and improves the cutting efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of a 2-inch PVC pipe located in the cutter receiving groove according to an embodiment of this application;
[0019] Figure 2 for Figure 1 A schematic diagram of the structure in which the tip of the cutter is inserted into the PVC pipe;
[0020] Figure 3 for Figure 2 A schematic diagram of a structure in which both the first and second cutting sections are in contact with the PVC pipe;
[0021] Figure 4 for Figure 1 A schematic diagram of the structure where the tip of the cutting tool protrudes through the PVC pipe;
[0022] Figure 5 This is a schematic diagram of a 1-1 / 4 inch PVC pipe located in a receiving groove in another embodiment of this application;
[0023] Figure 6 for Figure 5 A schematic diagram of a structure in which both the first and second cutting sections are in contact with the PVC pipe;
[0024] Figure 7 for Figure 5 A schematic diagram of a structure in which both the first cutting edge and the tip are in contact with the PVC pipe;
[0025] Figure 8 for Figure 5 A schematic diagram of the structure in which the pointed end of the PVC pipe protrudes;
[0026] Figure 9 This is a partial structural diagram of a cutting tool according to an embodiment of this application;
[0027] Figure 10 This is a schematic diagram of a cutter cutting a 1-1 / 2-inch PVC pipe according to one embodiment of this application;
[0028] Figure 11 This is a schematic diagram of a cutter cutting a 1-inch PVC pipe in one embodiment of this application;
[0029] Figure 12 for Figure 9 Partial structural diagram;
[0030] Figure 13 for Figure 9 A schematic diagram of the blade structure in the image;
[0031] Figure 14 for Figure 11 A structural diagram of the blade from another angle.
[0032] Reference numerals: 1. Fixed handle; 10. Chamber; 11. Groove; 12. Shaft; 13. Slot; 2. Blade; 21. Cutting edge; 210. Tip; 211. First cutting segment; 2111. First side; 212. Second cutting segment; 2121. Second side; 3. Movable handle; 4. PVC pipe; 5. Receiving groove; 51. Opening; 6. Cutting point. Detailed Implementation
[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0038] like Figures 1 to 14 As shown, this application discloses a cutting tool. The cutting tool includes a fixed handle 1 and a blade 2. The fixed handle 1 has a support portion. The blade 2 is disposed on the fixed handle 1 and is arranged to move towards or away from the support portion. Furthermore, a receiving groove 5 with a front opening 51 is formed between the blade 2 and the support portion to allow the cutting material to enter. A V-shaped cutting edge 21 is formed on the side of the blade 2 facing the support portion, with the tip 210 of the cutting edge 21 facing the support portion.
[0039] Understandably, the cutter uses a V-shaped blade 21. During the cutting process, the tip 210 first pierces the workpiece, and then the blade 2 rotates to continuously cut the workpiece from the piercing point. The whole cutting process is convenient and improves cutting efficiency.
[0040] In this embodiment, such as Figure 12 As shown, the support part is a groove 11 with an opening facing the blade 2.
[0041] like Figure 9 and Figure 12 As shown, the fixed handle 1 has a chamber 10, and the fixed handle 1 has a slot 13 communicating with the chamber 10. Part of the slot 13 is located on the support part. A rotating shaft 12 is provided inside the chamber 10. Part of the blade 2 is inserted into the chamber 10 through the slot 13 and is mounted on the rotating shaft 12. The presence of the slot 13 allows the blade 2 to extend out of the slot 13 when it rotates upward relative to the fixed handle 1. When the blade 2 rotates downward relative to the fixed handle 1, the cutting edge 21 on the blade 2 can be at least partially hidden in the slot 13.
[0042] Furthermore, such as Figures 1-10 As shown, the cutter also includes a movable handle 3 for moving the blade 2 toward or away from the support. The first end of the movable handle 3 is rotatably connected to the fixed handle 1, and the movable handle 3 is connected to the blade 2 via a transmission assembly. Thus, by rotating the movable handle 3 toward or away from the fixed handle 1, the blade 2 can be moved relative to the fixed handle 1.
[0043] The structure of the aforementioned transmission component can be any structure found in the prior art, and will not be described in detail in this embodiment.
[0044] In this embodiment, the aforementioned cutting component is a PVC pipe 4, the thickness of which is 1.73mm to 3.91mm, and the outer diameter of which is 10.29mm to 60.32mm. The dimensions of the PVC pipe are illustrative, such as 2 inches, 1-1 / 2 inches, 1-1 / 4 inches, 1 inch, 3 / 4 inch, 1 / 2 inch, 3 / 8 inch, 1 / 4 inch, 1 / 8 inch, etc.
[0045] Figures 1-4 This is the cutting process of using a cutter to cut a 2-inch PVC pipe. Figures 5-8 It is the cutting process of using a cutter to cut 1-1 / 4 inch PVC pipes. Figure 10 The cutter is used to cut 1-1 / 2 inch PVC pipes. Figure 11 It is a cutter used to cut 1-inch PVC pipe 4.
[0046] In this embodiment, at least a portion of the groove 11 matches the wall of the PVC pipe 4 and is arc-shaped. This provides better support for the PVC pipe 4 and makes it easier to maintain the stability of the PVC pipe 4 during the cutting process.
[0047] like Figures 1 to 8 , Figure 10 and Figure 11 As shown, the contact point where the blade 21 contacts the wall of the PVC pipe 4 is the cutting point 6. There are two cutting points 6, which are spaced apart along the length of the blade 21. That is to say, during the entire cutting process, the blade 21 contacts the wall of the PVC pipe 4 at two cutting points 6. Therefore, with two cutting points, the cutter only needs to apply force to the two cutting points, making the cutting more effortless and avoiding the problem of excessive cutting effort caused by three or more cutting points.
[0048] It should be noted that the position of cutting point 6 changes during the cutting process.
[0049] like Figure 13 and Figure 14As shown, the blade 21 includes a first blade segment 211 and a second blade segment 212 connected sequentially from front to back. The point where the first blade segment 211 and the second blade segment 212 connect is the tip 210. The included angle between the first blade segment 211 and the second blade segment 212 is α, and the included angle α satisfies: 145°≤α≤165°.
[0050] By using the aforementioned range of included angle α, the blade 21 has two cutting points 6 with the wall of the PVC pipe 4 during the cutting process, thus avoiding the problem of excessive cutting effort caused by cutting at three or more points.
[0051] Furthermore, the included angle α is 155°. This better ensures that the blade 21 has two cutting points 6 with the wall of the PVC pipe 4 during the cutting process.
[0052] Furthermore, the length of the first cutting segment 211 is greater than the length of the second cutting segment 212. This further ensures that the blade 21 avoids having three or more cutting points 6 between itself and the PVC pipe 4 during the cutting process.
[0053] like Figure 13 and Figure 14 As shown, the first cutting edge 211 has two first side surfaces 2111 along its thickness direction that gradually slope away from each other from front to back, and the second cutting edge 212 has two second side surfaces 2121 along its thickness direction that gradually slope away from each other from back to front. The rear end of the first side surface 2111 is connected to the front end of the corresponding second side surface 2121. This ensures the strength of the tip 210, allowing for more reliable cutting through the wall of the PVC pipe 4 during the initial cut. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.
[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A cutting knife characterized in that, The utility model relates to a cutting knife, which comprises: a fixed handle provided with a support part; a blade arranged on the fixed handle and capable of moving towards or away from the support part, a receiving groove formed between the blade and the support part for a cutting member to enter, a V-shaped blade edge formed on one side of the blade towards the support part, and a tip of the blade edge towards the support part.
2. The cutter of claim 1, wherein The support part is a groove with an opening towards the blade.
3. The cutter of claim 1 wherein, The fixed handle has a cavity, and the fixed handle is provided with a slot in communication with the cavity, part of the slot being located on the support part, a rotating shaft being arranged in the cavity, and part of the blade being inserted into the cavity from the slot and mounted on the rotating shaft.
4. The cutter of claim 1 wherein, The cutting knife further comprises a movable handle for driving the blade to move towards or away from the support part, a first end of the movable handle being rotatably connected to the fixed handle, and the movable handle being connected to the blade through a transmission assembly.
5. The cutter of any one of claims 1 to 4, wherein, The cutting member is a PVC pipe, a contact point between the blade edge and a pipe wall of the PVC pipe being a cutting point, the cutting point having two and being arranged along a length direction of the blade edge.
6. The cutter of claim 5 wherein, The blade edge comprises a first blade segment and a second blade segment connected in sequence from front to back, the first blade segment and the second blade segment being connected at the tip, an included angle between the first blade segment and the second blade segment being alpha, and alpha satisfying 145°≤alpha≤165°.
7. The knife of claim 6, wherein, The included angle alpha is 155°.
8. The knife of claim 6, wherein, The length of the first blade segment is greater than the length of the second blade segment.
9. The knife of claim 6, wherein, Two first side surfaces of the first blade segment along a thickness direction thereof are gradually inclined away from each other from front to back, two second side surfaces of the second blade segment along a thickness direction thereof are gradually inclined towards each other from back to front, and a rear end of the first side surface is connected to a front end of the corresponding second side surface.
10. The knife of claim 5, wherein, The thickness of the PVC pipe is 1.73mm-3.91mm, and the outer diameter of the PVC pipe is 10.29mm-60.32mm.