Paper cutter

Abstract

The utility model discloses a paper cutter which is particularly suitable for cutting roll-shaped paper and comprises a hollow barrel and a cutting blade, the cutting blade is installed on a sliding rail structure in a sliding mode so that the cutting blade can be detachably connected to the hollow barrel, and the cutting edge of the cutting blade is flush with the closed end of a strip-shaped groove. The paper is stably limited through the closed port, the cutting process is stable, and the cutting quality is good; the blade is convenient and fast to install, labor-saving and time-saving, the blade is directly pushed in from the bottom of the sliding rail, and the blade is pulled out from the sliding rail during disassembly or replacement.

Description

Technical Field

[0001] The utility model relates to the field of stationery, in particular to a paper cutter. Background Art

[0002] Cutting paper, especially roll paper (paper rolled into a tube, such as gift wrapping paper), is a common task in daily life and work. The most traditional way is to use tools such as cutters and scissors to cut, but the cutting path is easy to bend, the edges are prone to burrs, the cutting effect is not ideal, and the degree of standardization is low.

[0003] For this purpose, a special cutter for roll paper has emerged, which has a hollow cylindrical structure, a strip groove is opened on the side wall of the cylinder, and a sharp cutting blade is installed at the end of the strip groove. The working principle of this type of roll paper cutter is as follows: first, the free end of the roll paper is spread out to a certain length, and the reel part of the roll paper is inserted into the hollow sleeve of the cutter. At the same time, the edge of the unfolded paper is inserted into the strip groove of the paper cutter and clamped and fixed by the strip groove. The position on the edge of the paper to be cut is pressed against the cutting blade. Then the cutter is manually pushed forward along the extension direction of the strip groove, so that the blade cuts the paper. The prior art and working principle of this roll paper cutter can be found in the Chinese utility model <Paper Cutter> with announcement number CN219255676U.

[0004] In the existing paper roll cutter, in order to install the cutting blade, the strip groove opened on the side wall of the cylinder usually has two structural forms. (1) One end of the strip groove is an open end and the other end is a closed end. The cutting blade is fixedly installed in the closed end. Before cutting, the edge of the paper is inserted into the strip groove from the open end and slid along the opening of the strip groove to the closed end until it is tightly pressed against the cutting blade. The paper cutter disclosed in Chinese utility model CN219255676U adopts this structural form. Since the structure of this groove has a good guiding effect on the paper, when the paper slides to the closed end, it will be limited and fixed, so the blade edge will always be stably aligned with the edge of the paper, making the cutting process stable. However, the installation and removal and replacement of the blade are inconvenient. During installation, the blade needs to be pressed into the strip groove from top to bottom. After installation, it is even more difficult to remove the blade from the groove. (2) The strip groove is in the form of a through groove, that is, both ends are open. This through groove does not have a good effect on the positioning and fixing of the paper. During the cutting process, the blade cannot be stably aligned with the edge of the paper. Specifically, when the edge of the paper slides along the through groove to the blade, the two sides of the paper will be limited by the side walls of the groove. However, since the through groove lacks a closed end, the paper lacks positioning in the end direction. As a result, the paper tends to shake back and forth, and the blade edge cannot always be stably aligned with the edge of the paper, which easily affects the cutting quality. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a paper cutter, which can solve the problems of the inconvenience of blade installation and disassembly and the inability to align the blade in the prior art paper cutter.

[0006] The utility model is realized by the following technical solutions:

[0007] A paper cutter comprises: a hollow cylinder, wherein the interior of the hollow cylinder is provided with a hollow passage for a roll structure to pass through; a side wall of the hollow cylinder is provided with: a strip groove for an edge of a paper to pass through; one end of the strip groove is an open end, and the other end is a closed end; a slide rail structure is provided on the side wall of the hollow cylinder; a cutting blade, wherein the cutting blade is slidably mounted on the slide rail structure so that the cutting blade can be detachably connected to the hollow cylinder; when the cutting blade is mounted on the slide rail structure, the cutting edge of the cutting blade is flush with the closed end of the strip groove.

[0008] Furthermore, the slide rail structure comprises two slide rails symmetrically arranged along two sides; and the two sides of the cutting blade are provided with sliding connection parts, and the sliding connection parts match the slide rail structure and are suitable for sliding with each other.

[0009] Furthermore, a boss structure is protruding on the top surface of the cutting blade to facilitate manual pushing and pulling of the blade, and the boss structure is located on an end of the cutting blade away from the blade edge.

[0010] Furthermore, one end of the slide rail structure is an opening for the sliding connection part to enter, and the other end is a closed limiting surface; when one end of the sliding connection part close to the blade presses against the limiting surface of the slide rail structure, the blade of the cutting blade is flush with the closed end of the strip groove.

[0011] Furthermore, a limiting boss is protruding on the side wall of the hollow cylinder, and the limiting boss is located between the two slide rails; a bottom slide groove is provided on the bottom surface of the cutting blade, and the limiting boss is placed in the bottom slide groove; when the bottom slide groove abuts against the limiting boss and limits the cutting blade, the blade edge of the cutting blade is flush with the closed end of the strip groove.

[0012] Furthermore, the paper cutter also includes: a push-pull device; a notch is opened on the side wall of the hollow cylinder, the push-pull device is movably arranged in the notch, and the push-pull device has a movable matching surface on the side facing the hollow channel; when the push-pull device moves toward the inside of the hollow cylinder, the movable matching surface enters the inside of the hollow cylinder and compresses the inner diameter of the hollow channel.

[0013] Furthermore, the paper cutter also includes: an outer handle, which is fixedly formed on the outer side wall of the hollow cylinder; the push-pull device also includes a joint for connecting the outer handle, and the joint of the push-pull device is movably connected to the outer handle so that the movable mating surface is movably arranged in the notch.

[0014] Furthermore, the outer handle has a cavity inside, and the engaging portion of the push-pull device is inserted into the cavity of the outer handle; the outer handle is provided with a plurality of slot structures, and the plurality of slot structures are closely arranged in a straight line direction and interconnected, and the engaging portion of the push-pull device is provided with a buckle structure, and the buckle structure is selectively engaged in the slot structure.

[0015] Furthermore, the notch of the strip-shaped groove forms a paper feed channel, and the starting section of the paper feed channel relative to the opening is a trumpet-shaped wide paper feed section, and the width of the wide paper feed section gradually increases toward one side of the opening.

[0016] Furthermore, a limiting slope is formed on the side wall of the hollow cylinder, and the limiting slope and the strip groove are on the same horizontal plane; the wide paper feed section is connected to a straight section on the side away from the opening; the limiting slope causes the paper feed channel to form a narrowing section, a transition section and a limiting section in sequence along the closed end direction; the narrowing section is connected to the side of the straight section away from the wide paper feed section, and the width of the narrowing section gradually narrows and decreases along the closed end side direction; the closed end of the strip groove is located in the limiting section, and the limiting section is inclined relative to the transition section.

[0017] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0018] When cutting, first spread the free end of the paper roll to a certain length, extend the reel part of the paper roll into the hollow channel of the hollow cylinder, insert the edge of the spread paper into the strip groove, and slide along the notch direction of the strip groove to the position of the closed end, and the edge of the paper is pressed against the cutting edge of the cutting blade. Then, push the paper cutter forward, because the closed end has a good limiting effect on the edge of the paper, the paper is not easy to shake, so the cutting blade can always be stably aligned with the edge of the paper, ensuring the cutting effect, making the cutting path stable and the cutting edge smooth.

[0019] Since the slide rail structure is provided on the hollow cylinder, when installing the cutting blade, it is only necessary to push the cutting blade directly from the bottom of the slide rail structure, which is convenient, fast, labor-saving and time-saving. After the cutting blade is installed, the edge of the blade is directly opposite to the closed end of the strip groove, so during the cutting process, the closed end can achieve good clamping and positioning on the edge of the paper, and the cutting blade can always stably face the edge of the paper.

[0020] (1) The utility model achieves stable positioning of the paper through a closed port, so the cutting process is stable and the cutting quality is good; (2) The blade is easy and quick to install, and the blade can be directly pushed in from the bottom of the slide rail. When disassembling or replacing, the blade can be pulled out from the slide rail, which is also convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a three-dimensional diagram of the utility model;

[0022] Figure 2 Shown is a three-dimensional view of the utility model from another angle;

[0023] Figure 3 Shown is a three-dimensional view of the utility model from another angle;

[0024] Figure 4 Shown is an exploded schematic diagram of the utility model;

[0025] Figure 5 Shown is a schematic diagram of the cooperation between the cutting blade and the hollow cylinder;

[0026] Figure 6 Shown is a top view of the hollow cylinder;

[0027] Figure 7 Shown is a schematic diagram of the structure of a cutting blade;

[0028] Figure 8 The figure shows the cooperation diagram of the push-pull device and the hollow cylinder;

[0029] Fig. 9 Shown is a schematic diagram of the cooperation between the push-pull device and the outer handle.

[0030] In the figure: 10, hollow cylinder; 11, hollow channel; 12, strip groove; 121, wide paper feeding section; 122, straight section; 123, narrowing section; 124, transition section; 125, limiting section; 13, left cylinder; 14, right cylinder; 15, middle connecting part; 151, limiting boss; 152, limiting inclined surface; 16, slide rail structure; 17, notch; 20, cutting blade; 21, sliding connection part; 22, bottom slide groove; 23, boss structure; 30, push-pull device; 31, movable matching surface; 32, joint part; 321, buckle structure; 40, outer handle; 41, slot structure. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0032] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] The utility model discloses a paper cutter, which is particularly suitable for cutting roll-shaped paper.

[0036] See also Figure 1-Figure 4 The utility model includes a hollow cylinder 10 and a cutting blade 20. The hollow cylinder 10 has a hollow passage 11 inside for the roll of paper to pass through; a strip groove 12 is provided on the side wall of the hollow cylinder 10 for the edge of the paper of the unrolled part of the roll to enter, one end of the strip groove 12 is an open end and passes through the bottom of the hollow cylinder 10, and the other end is a closed end. More specifically, based on the structure of the strip groove 12, it can be regarded as dividing the hollow cylinder 10 into three parts, see Figure 4 , which are respectively a left cylinder 13 located on the left side of the strip groove 12 , a right cylinder 14 located on the right side of the strip groove 12 , and a middle connecting portion 15 located above the strip groove 12 .

[0037] See also Figure 5, a slide rail structure 16 is provided on the side wall of the hollow cylinder 10, more specifically, a slide rail structure 16 is provided on the middle connecting portion 15 of the hollow cylinder 10. The cutting blade 20 is slidably installed in the slide rail structure 16, so that the cutting blade 20 is detachably connected to the hollow cylinder 10. When the cutting blade 20 is installed in the slide rail structure 16, the edge of the cutting blade 20 is flush with the closed end of the strip groove 12 (see Figure 2 ), so that the edge of the blade can be directly opposite the edge of the paper located in the closed end.

[0038] When cutting, the free end of the paper roll is first spread out to a certain length, and the reel part of the paper roll is inserted into the hollow channel 11 of the hollow cylinder 10. The edge of the spread paper is inserted into the strip groove 12, and slides along the notch direction of the strip groove 12 to the position of the closed end, and the edge of the paper is pressed against the blade of the cutting blade 20. In this way, the paper cutter is pushed forward, and the closed end has a good clamping and positioning effect on the edge of the paper, so that the paper is not easy to shake, so the cutting blade 20 can always be stably aligned with the edge of the paper, ensuring the cutting effect, making the cutting path stable and the cutting edge smooth.

[0039] Since the slide rail structure 16 is provided on the hollow cylinder 10, when installing the cutting blade 20, it is only necessary to push the cutting blade 20 directly into the hollow cylinder 10 from the bottom (see FIG. Figure 4 After the cutting blade 20 is installed, the edge of the blade is directly opposite to the closed end of the strip groove 12, so during the cutting process, the closed end can achieve good clamping and positioning of the edge of the paper, and the blade of the cutting blade 20 can always be stably opposite to the edge of the paper.

[0040] (1) The utility model achieves stable positioning of the paper through a closed port, so the cutting process is stable and the cutting quality is good; (2) The blade is easy and quick to install, and the blade can be directly pushed in from the bottom of the slide rail. When disassembling or replacing, the blade can be pulled out from the slide rail, which is also convenient.

[0041] Specifically, see Figure 5 The slide rail structure 16 includes two slide rails symmetrically arranged on both sides. Figure 7 The cutting blade 20 has sliding connection parts 21 on both sides. The sliding connection parts 21 match the slide rail structure 16 and are suitable for sliding with each other, so that the blade can be slidably installed in the slide rail structure 16.

[0042] In order to facilitate manual pushing of the cutting blade 20 into the slide rail structure 16, preferably, refer to Figure 7 A boss structure 23 is also protruding on the top surface of the cutting blade 20. The boss structure 23 is located on the end of the cutting blade 20 away from the blade edge.

[0043] Furthermore, one end of the slide rail structure 16 is an opening for the sliding connection part 21 to enter, and the other end is a closed limiting surface, which is used to limit the installation of the cutting blade 20. When the end of the sliding connection part 21 close to the blade abuts against the limiting surface of the slide rail structure 16, that is, the cutting blade 20 has been installed in place, the blade of the cutting blade 20 is flush with the closed end of the strip groove 12, and the blade is facing the edge of the paper.

[0044] Further, see Figure 6 A limiting boss 151 is also provided on the middle connecting portion 15 of the hollow cylinder 10, and the limiting boss 151 is located between the two slide rails; correspondingly, refer to Figure 7 The bottom surface of the cutting blade 20 is provided with a bottom slide groove 22, and the limiting protrusion 151 is placed in the bottom slide groove 22. When the user pushes the cutting blade 20 into the slide rail structure 16 for installation, when the bottom slide groove 22 abuts against the limiting protrusion 151 and limits the cutting blade 20, that is, the cutting blade 20 has been installed in place, the blade of the cutting blade 20 is flush with the closed end of the strip groove 12, and the blade is facing the edge of the paper.

[0045] In addition, the utility model also has an adjustment function and can be adapted for use with rolls of paper of different diameters.

[0046] Specifically, the present invention further includes a push-pull device 30. Figure 8-Figure 9 A notch 17 is provided on the side wall of the hollow cylinder 10, and the push-pull device 30 is movably arranged in the notch 17. The push-pull device 30 has a movable mating surface 31 on the side facing the hollow channel 11. When the push-pull device 30 moves into the hollow cylinder 10, the movable mating surface 31 enters into the hollow cylinder 10, thereby compressing the inner diameter of the hollow channel 11; on the contrary, when the push-pull device 30 withdraws from the inside of the hollow cylinder 10 and completely returns to the notch 17, the inner diameter of the hollow channel 11 increases again. By adjusting the position of the push-pull device 30, the utility model can adjust the inner diameter of the hollow channel 11, so that the paper cutter can be adapted to rolls of different diameters.

[0047] More specifically, see Fig. 9 The present invention further includes an outer handle 40, which is fixedly formed on the outer side wall of the hollow cylinder 10. The push-pull device 30 further includes a joint portion 32 for connecting the outer handle 40, and the joint portion 32 is movably engaged with the outer handle 40, so that the movable mating surface 31 is movably arranged in the notch 17, and can enter or exit the interior of the hollow cylinder 10, thereby changing the inner diameter of the hollow channel 11.

[0048] More specifically, the following structure is used between the outer handle 40 and the push-pull device 30 to achieve the active connection of multi-gear adjustment. The outer handle 40 has a cavity, and the joint portion 32 of the push-pull device 30 is integrally inserted into the cavity of the outer handle 40; Fig. 9 ,as well as Figure 6 A plurality of slot structures 41 are stamped out on the outer handle 40, and the plurality of slot structures 41 are closely arranged in a straight line direction and interpenetrate each other. Accordingly, a buckle structure 321 is convexly provided on the joint portion 32 of the push-pull device 30, and the buckle structure 321 is engaged in one of the slot structures 41; when the push-pull device 30 is pushed, the buckle structure 321 moves in a plurality of the slot structures 41, so that the movable mating surface 31 is extended and retracted in the hollow cylinder 10, thereby adjusting the size of the hollow channel 11.

[0049] Of course, in order to ensure the stability of the above-mentioned active snap-in connection, the top and bottom of the outer handle 40 are symmetrically provided with the same number and position of slot structures 41. Correspondingly, the top and bottom of the joint 32 of the push-pull device 30 are symmetrically provided with a snap structure 321, respectively. The upper and lower snap structures 321 are simultaneously snap-connected with the upper and lower slot structures 41 to enhance stability.

[0050] Preferably, the notch of the strip groove 12 itself forms a paper feeding channel. Figure 6 The starting section of the paper feed channel relative to its opening is a trumpet-shaped wide paper feed section 121, and the width of the wide paper feed section 121 gradually increases in the direction toward one side of the opening. In this way, since the opening of the paper feed channel is open, it is convenient to store the edge of the paper into the paper feed channel.

[0051] Further, see Figure 6 and Figure 2 A limiting slope 152 is formed on the middle connecting portion 15 of the hollow cylinder 10, and the limiting slope 152 and the strip groove 12 are on the same horizontal plane. The wide paper feed section 121 is connected to a straight section 122 on the side away from the opening, and the straight section 122 is horizontal and vertical. The shape of the limiting slope 152 is set so that the paper feed channel is formed with a narrowing section 123, a transition section 124 and a limiting section 125 in sequence along the closed end direction. The narrowing section 123 is connected to the side of the straight section 122 away from the wide paper feed section 121, and the width of the narrowing section 123 gradually narrows and decreases along the closed end side direction; the closed end of the strip groove 12 is located in the limiting section 125, and the limiting section 125 is inclined relative to the straight section 122.

[0052] When feeding paper, the paper first enters the paper feeding channel through the wide paper feeding section 121, then passes through the straight section 122, and the passage of the narrowing section 123 gradually narrows, which prevents the paper from bending and allows the paper to be transported straight to the transition section 124; then the paper enters the limiting section 125 to limit the edge of the paper. Since the limiting section 125 and the transition section 124 are inclined, it is equivalent to the limiting slope 152 pressing against the side of the paper, so that the surface of the paper is tensioned, which is conducive to the blade always accurately acting on the edge of the paper during cutting, ensuring the cutting quality.

[0053] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A paper cutter, characterized in that: include: A hollow cylinder, wherein the interior of the hollow cylinder has a hollow passage for the roll structure to pass through; a strip groove for the edge of the paper to pass through is opened on the side wall of the hollow cylinder; one end of the strip groove is an open end and the other end is a closed end; a slide rail structure is provided on the side wall of the hollow cylinder; A cutting blade, wherein the cutting blade is slidably mounted on the slide rail structure so that the cutting blade can be detachably connected to the hollow cylinder; When the cutting blade is mounted on the slide rail structure, the cutting edge of the cutting blade is flush with the closed end of the strip groove.

2. The paper cutter according to claim 1, characterized in that: The slide rail structure comprises two slide rails symmetrically arranged along two sides; two sides of the cutting blade are provided with sliding connection parts, and the sliding connection parts match the slide rail structure and are suitable for sliding with each other.

3. The paper cutter according to claim 1, characterized in that: A boss structure is also convexly provided on the top surface of the cutting blade for facilitating manual pushing and pulling of the blade, and the boss structure is located on an end of the cutting blade away from the blade edge.

4. The paper cutter according to claim 2, characterized in that: One end of the slide rail structure is an opening for the sliding connection part to enter, and the other end is a closed limiting surface; When one end of the sliding connection portion close to the blade abuts against the limiting surface of the slide rail structure, the blade of the cutting blade is flush with the closed end of the strip groove.

5. The paper cutter according to claim 2, characterized in that: A limiting convex column is also convexly provided on the side wall of the hollow cylinder, and the limiting convex column is located between the two slide rails; a bottom slide groove is provided on the bottom surface of the cutting blade, and the limiting convex column is placed in the bottom slide groove; When the bottom sliding groove abuts against the limiting convex column and limits the cutting blade, the cutting edge of the cutting blade is flush with the closed end of the strip groove.

6. The paper cutter according to claim 1, characterized in that: The paper cutter further comprises: a push-pull device; A notch is provided on the side wall of the hollow cylinder, the push-pull device is movably arranged in the notch, and the push-pull device has a movable mating surface on one side facing the hollow channel; When the push-pull device moves toward the interior of the hollow cylinder, the movable matching surface enters the interior of the hollow cylinder and compresses the inner diameter of the hollow channel.

7. The paper cutter according to claim 6, characterized in that: The paper cutter further comprises: an outer handle, which is fixedly formed on the outer side wall of the hollow cylinder; the push-pull device further comprises a joint portion for connecting the outer handle, and the joint portion of the push-pull device is movably connected to the outer handle so that the movable matching surface is movably arranged in the notch.

8. The paper cutter according to claim 7, characterized in that: The outer handle has a cavity inside, and the engaging portion of the push-pull device is inserted into the cavity of the outer handle; the outer handle is provided with a plurality of slot structures, which are closely arranged in a straight line direction and interconnected, and the engaging portion of the push-pull device is provided with a buckle structure, which is selectively engaged in the buckle structure.

9. The paper cutter according to claim 1, characterized in that: The notch of the strip groove forms a paper feeding channel. The starting section of the paper feeding channel relative to the opening is a trumpet-shaped wide paper feeding section, and the width of the wide paper feeding section gradually increases toward one side of the opening.

10. The paper cutter according to claim 9, characterized in that: A limiting inclined surface is formed on the side wall of the hollow cylinder, and the limiting inclined surface and the strip groove are on the same horizontal plane; The wide paper feeding section is connected to a straight section on a side away from the opening; The limiting inclined surface forms a narrowing section, a transition section and a limiting section in sequence on the paper feed channel along the closed end direction; the narrowing section is connected to the side of the straight section away from the wide paper feed section, and the width of the narrowing section gradually narrows and decreases along the closed end side direction; the closed end of the strip groove is located in the limiting section, and the limiting section is inclined relative to the transition section.

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