A paper cutter blade structure and its control method

Abstract

This invention discloses a cutting blade structure and its control method for a paper cutter, relating to the field of paper cutter technology. The cutting blade structure of the paper cutter includes a rotating roller, an elastic element, and an adjusting mechanism. Multiple sets of cutting blade assemblies are sequentially mounted on the rotating roller along its extension direction, and each cutting blade assembly rotates synchronously with the rotating roller. The elastic element is disposed between adjacent cutting blade assemblies. The adjusting mechanism is located at one end of the rotating roller and is used to push the cutting blade assemblies against the elastic element to reduce the distance between the cutting blade assemblies, or to release the elastic element to allow it to spring back the cutting blade assemblies, thereby increasing the distance between the cutting blade assemblies. The control method automatically adjusts the distance between each set of cutting blade assemblies according to the paper thickness. This invention can automatically adjust the distance between the cutting blade assemblies, is suitable for paper of various thicknesses, and improves applicability.

Description

Technical Field

[0001] This invention relates to the field of paper cutter technology, and in particular to a cutting blade structure and control method for a paper cutter. Background Technology

[0002] The current paper cutter's cutting blade assembly is fixed and cannot be moved. It cannot automatically adjust the spacing between the cutting blade assemblies, so the cutting blade structure cannot adapt to paper of various thicknesses and has low applicability. Summary of the Invention

[0003] The purpose of this invention is to provide a cutting blade structure and control method for a paper cutter, which can automatically adjust the spacing between the cutters and improve applicability.

[0004] To achieve the above objectives, the solution of the present invention is as follows:

[0005] A paper cutter structure includes a rotating roller, an elastic element, and an adjusting mechanism. Multiple sets of cutter assemblies are sequentially mounted on the rotating roller along its extension direction, and each cutter assembly rotates synchronously with the rotating roller. The elastic element is disposed between adjacent cutter assemblies. The adjusting mechanism is located at one end of the rotating roller and is used to push the cutter assembly to compress the elastic element to reduce the distance between the cutter assemblies, or to release the elastic element to allow it to spring back onto the cutter assembly to increase the distance between the cutter assemblies.

[0006] Furthermore, the adjustment mechanism includes an adjusting nut and a drive motor. The drive motor includes a motor shaft and a motor housing. The motor shaft is axially slidably connected to a rotating roller and rotates synchronously with the rotating roller, so that the motor housing is the output end. One end of the adjusting nut is fixedly connected to the motor housing, and the other end is screwed onto the rotating roller, so that when the motor housing rotates, it drives the adjusting nut to move away from or closer to the cutter assembly.

[0007] Furthermore, the cutting assembly includes two annular blades and an annular inner blade pad, with the inner blade pad disposed between the two blades to create a gap between them.

[0008] Furthermore, an annular outer blade pad is provided between adjacent cutting blade assemblies. The outer blade pad is located on one side of the elastic element so that there is a gap between adjacent cutting blade assemblies. The gap between adjacent cutting blade assemblies is greater than the sum of the thickness of the two blades and the gap between the two blades.

[0009] Furthermore, it also includes a housing, the number of housings corresponding to the number of cutting blade assemblies, and there is a gap between each housing. The housing has a recessed groove, and the cutting blade assembly is placed in the groove. The bottom of the groove has two strip holes corresponding to the positions of the two blades. The length of the strip holes is less than the diameter of the blades, so that the two blades can extend out of the housing.

[0010] Furthermore, a protrusion is provided on the outer wall of the casing between the two strip holes. The protrusion is provided along the extension direction of the strip holes, and its length is greater than that of the strip holes. The two ends of the protrusion are located outside the two ends of the strip holes, and the protrusion is sloping. Its height is less than that of the blade, and its two ends are smoothly transitioned to the outer wall of the casing.

[0011] Furthermore, the rotating roller is also connected to a main motor, which is used to drive the rotating roller to rotate.

[0012] A method for controlling the cutter structure of a paper cutter, using the aforementioned cutter structure, includes the following steps:

[0013] Step 1: Control the adjustment mechanism to prevent it from pushing against the cutter assembly, set the main motor to run at a constant speed V, detect and record the load current I1 of the main motor when no paper is fed, and detect and record the load current I2 of the main motor after the paper is fed.

[0014] Step 2: By controlling the difference I3 between the load current I2 of the main motor after the paper is fed and the load current I1 of the main motor before the paper is fed, the thickness D of the paper is calculated. Then, the spacing L between each cutter assembly is adjusted according to the thickness D of the paper.

[0015] Furthermore, in step one, the main motor runs at a constant speed of 8 m / min. In step two, the relationship between D and I3 is: D = 0.07772 * I3 + 0.0054 (1), and the relationship between L and D is: L = -14.067D. 2 +8.5223D+0.4255(2), based on equations (1) and (2), the relationship between L and I3 can be derived as: L=-0.00835I3 2 +0.6479I3+0.4652.

[0016] After adopting the above solution, the beneficial effects of the present invention are as follows:

[0017] This invention includes a rotating roller, an elastic element, and an adjusting mechanism. Multiple sets of cutter assemblies are sequentially mounted on the rotating roller along its extension direction, and each cutter assembly rotates synchronously with the rotating roller. The elastic element is disposed between adjacent cutter assemblies. The adjusting mechanism is located at one end of the rotating roller and is used to push the cutter assemblies against the elastic element to reduce the distance between the cutter assemblies, or to release the elastic element to allow it to spring back the cutter assemblies, thereby increasing the distance between the cutter assemblies. In use, the adjusting mechanism can automatically adjust the distance between the cutter assemblies, thus adapting to various paper thicknesses and improving applicability. Attached Figure Description

[0018] Figure 1 The present invention is used in assembly Figure 1;

[0019] Figure 2 The present invention is used in assembly Figure 2 ;

[0020] Figure 3 This is an exploded view of the overall structure of the present invention;

[0021] Figure 4 The shell structure of the present invention Figure 1 ;

[0022] Figure 5 The shell structure of the present invention Figure 2 ;

[0023] Figure 6 This is a partial structural cross-sectional view of the present invention;

[0024] Figure 7 This is a schematic diagram of the rotating roller and motor shaft structure of the present invention.

[0025] Label Explanation:

[0026] Cutting structure 1, rotating roller 10, cutting assembly 11, blade 111, inner blade pad 112, outer blade pad 12, key 13, elastic element 20, adjusting mechanism 30, adjusting nut 31, drive motor 32, motor shaft 321, keyway 3211, motor housing 322, sleeve 40, groove 41, strip hole 42, protrusion 43, main motor 2, frame 3. Detailed Implementation

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 7 As shown, the present invention provides a cutter structure 1 for a paper cutter, including a rotating roller 10, an elastic element 20, and an adjusting mechanism 30; the rotating roller 10 is sequentially fitted with multiple sets of cutter assemblies 11 along its extension direction, and each cutter assembly 11 rotates synchronously with the rotating roller 10; the elastic element 20 is disposed between adjacent cutter assemblies 11; the adjusting mechanism 30 is located at one end of the rotating roller 10 and is used to push the cutter assembly 11 to squeeze the elastic element 20 to reduce the distance between the cutter assemblies 11, or to loosen the elastic element 20 to rebound the cutter assembly 11 to increase the distance between the cutter assemblies 11; preferably, the cross-section of the rotating roller 10 is a waist shape with a circular shape symmetrically cut off from the center line, and correspondingly, the shape of the opening of the cutter assembly 11 is adapted to the cross-section of the rotating roller 10 so that the cutter assembly 11 can be fitted on the rotating roller 10 and can rotate synchronously with the rotating roller 10.

[0029] Furthermore, the adjustment mechanism 30 includes an adjusting nut 31 and a drive motor 32. The drive motor 32 includes a motor shaft 321 and a motor housing 322. The motor shaft 321 is axially slidably connected to the rotating roller 10 and rotates synchronously with the rotating roller 10, so that the motor housing 322 is the output end. One end of the adjusting nut 31 is fixedly connected to the motor housing 322, and the other end is screwed onto the rotating roller 10, so that when the motor housing 322 rotates, it drives the adjusting nut 31 to move away from or towards the cutter assembly 11. Preferably, a key 13 is provided at the end of the rotating roller 10 near the drive motor 32, and a keyway 3211 is provided on the motor shaft 321. The rotating roller 10 is axially inserted into the keyway 3211 of the motor shaft 321, so that the key 13 and the keyway 3211 are connected. The keyway 3211 is used to transmit torque. In this embodiment, when the drive motor 32 is working, the motor shaft 321 and the rotating roller 10 are connected to the keyway 3211 through the key 13, resulting in a large torque. Since the motor housing 322 is not fixed, the motor housing 322 rotates. As the output end of the drive motor 32 in this embodiment, one end of the adjusting nut 31 is fixedly connected to the motor housing 322, and the other end is screwed onto the rotating roller 10. When the motor housing 322 rotates, it will drive the adjusting nut 31 to move axially along the rotating roller 10, moving away from or towards the cutter assembly 11. While the adjusting nut 31 moves, the motor shaft 321 slides axially on the rotating roller 10 to cooperate with the movement of the adjusting nut 31.

[0030] Furthermore, the cutter assembly 11 includes two annular blades 111 and an annular inner blade pad 112. The inner blade pad 112 is disposed between the two blades 111 to create a gap between the two blades 111. Each cutter assembly 11 includes two blades 111, which improves paper cutting efficiency.

[0031] Furthermore, an annular outer blade pad 12 is provided between adjacent cutter assemblies 11. The outer blade pad 12 is located on one side of the elastic member 20 so that there is a gap between adjacent cutter assemblies 11. The gap between adjacent cutter assemblies 11 is greater than the sum of the thickness of the two blades 111 and the gap between the two blades 111, so that the cutter assemblies 11 of the same two cutter structures 1 can mesh with each other for cutting paper.

[0032] Furthermore, it also includes a housing 40, the number of housings 40 corresponding to the number of cutter assemblies 11, and there is a gap between each housing 40. A groove 41 is formed in the inner part of the housing 40, and the cutter assembly 11 is placed in the groove 41. Two strip holes 42 are opened at the bottom of the groove 41 corresponding to the positions of the two blades 111. The length of the strip holes 42 is less than the diameter of the blades 111, so that the two blades 111 can partially protrude from the housing 40. Specifically, the housing 40 is used to prevent the cut paper strips from getting tangled on the blades 111. 11. This causes paper jams, thereby damaging the cutter structure 1. Specifically, since the two blades 111 of the cutter assembly 11 extend out of the housing 40 and there is a gap between the housings 40, when the adjusting mechanism 30 pushes against the cutter assembly 11, the housings 40 also move with the cutter assembly 11, which reduces the gap between the housings 40. After the adjusting mechanism is released, the elastic element 20 rebounds the cutter assembly 11, and the housing also moves with the cutter assembly 11, which increases the gap between the housings 40.

[0033] Furthermore, a protrusion 43 is provided on the outer wall of the housing 40 between the two strip holes 42. The protrusion 43 is provided along the extension direction of the strip holes 42, and its length is greater than that of the strip holes 42. The two ends of the protrusion 43 are located outside the two ends of the strip holes 42, and the protrusion 43 is sloping. Its height is less than that of the blade 111, and its two ends are smoothly transitioned with the outer wall of the housing 40. This allows the paper to preferentially contact the protrusion 43 when feeding paper. Due to the smooth transition between the two ends of the protrusion 43 and the outer wall of the housing 40, the paper moves more easily along the protrusion 43. Since the protrusion 43 is sloping and its height is less than that of the blade 111, there is an intersection point between the protrusion 43 and the blade 111. After the paper passes the intersection point, it moves onto the blade 111. The blade 111 moves the paper and cuts it. Therefore, during the paper feeding process, the protrusion 43 prevents paper jams.

[0034] Furthermore, the rotating roller 10 is also connected to a main motor 2, which is used to drive the rotating roller 10 to rotate. Specifically, a gear is connected to the end of the rotating roller 10 away from the drive motor 32. The output end of the main motor 2 is the gear end. The rotating roller 10 is driven to rotate by meshing with the gear through the output end of the main motor 2.

[0035] Specifically, the cutter structure 1 of the present invention is mounted on the frame 3. An opening is provided on one side of the frame 3, and a bearing is provided on the other side. The bearing is positioned corresponding to the opening. The two ends of the rotating roller 10 pass through the opening and the bearing, respectively, and are rotatably mounted on the frame 3. One end of the adjusting nut 31 passes through the bearing and is screwed onto the rotating roller 10. The other end of the adjusting nut 31 is connected to the housing of the aforementioned drive motor 32. In the same manner, another cutter structure 1 with the same structure is mounted on the frame 3 below the cutter structure 1. The two cutter structures 1 mesh with each other to rotate and cut paper. The main motor 2 simultaneously drives the two cutter structures 1 to rotate in opposite directions. The main motor 2 is also fixed on the frame 3, and its output end meshes with the gear of the rotating roller 10. In addition, fixed rods are arranged parallel to each other on both sides of the rotating roller 10. The two ends of the fixed rods are fixed to the two sides of the frame 3. The two ends of the housing 40 are slidably connected to the fixed rods, so that the housing 40 can move with the cutter assembly 11.

[0036] The present invention also provides a control method for the cutter structure 1 of a paper cutter, which, using the above-mentioned cutter structure 1 of a paper cutter, includes the following steps:

[0037] Step 1: Control the adjustment mechanism 30 to not push the cutter assembly 11, set the main motor 2 to run at a constant speed V, detect and record the load current I1 of the main motor 2 when no paper is fed, and detect and record the load current I2 of the main motor 2 after the paper is fed.

[0038] Step 2: By controlling the difference I3 between the load current I2 of the main motor 2 after the paper is fed and the load current I1 of the main motor 2 before the paper is fed, the thickness D of the paper is calculated, and then the spacing L between each cutter assembly 11 is adjusted by the adjustment mechanism 30 according to the thickness D of the paper.

[0039] Furthermore, in step one, the main motor runs at a constant speed of 8 m / min. In step two, the relationship between D and I3 is: D = 0.07772 * I3 + 0.0054 (1), and the relationship between L and D is: L = -14.067D. 2 +8.5223D+0.4255(2), based on equations (1) and (2), the relationship between L and I3 can be derived as: L=-0.00835I3 2 +0.6479I3+0.4652;

[0040] Specifically, when the main motor is controlled to run at a constant speed of 8 m / min, and the thickness D of the paper is controlled between 0.02 mm and 0.3 mm, the changes in I3 are measured as follows: When I1 = 3.2 A and D = 0.02 mm, I2 = 3.387 A and I3 = 0.187 A; when I1 = 3.2 A and D = 0.05 mm, I2 = 3.78 A and I3 = 0.058 A; when I1 = 3.2 A and D = 0.1 mm, I2 = 4.5 A and I3 = 1.3 A; when I1 = 3.2 A and D = 0.13 mm, I2 = 4.79 A and I3 = 1.59 A; when I1 = 3.2 A and D = 0.15 mm, ... I2 = 5.1A, I3 = 1.9A; when I1 = 3.2A, D = 0.18mm, I2 = 5.41A, I3 = 2.21A; when I1 = 3.2A, D = 0.2mm, I2 = 5.74A, I3 = 2.54A; when I1 = 3.2A, D = 0.25mm, I2 = 6.2A, I3 = 3A; when I1 = 3.2A, D = 0.28mm, I2 = 6.85A, I3 = 3.65A; when I1 = 3.2A, D = 0.3mm, I2 = 7.05A, I3 = 3.85A. From the above data, we can derive D = 0.07772 * I3 + 0.0054 (1);

[0041] When paper of thickness D was placed in the above operation, the changes in L were measured as follows: when D = 0.02 mm, L = 0.6 mm; when D = 0.05 mm, L = 0.8 mm; when D = 0.1 mm, L = 1.15 mm; when D = 0.13 mm, L = 1.26 mm; when D = 0.15 mm, L = 1.4 mm; when D = 0.18 mm, L = 1.53 mm; when D = 0.2 mm, L = 1.59 mm; when D = 0.25 mm, L = 1.64 mm; when D = 0.28 mm, L = 1.68 mm; when D = 0.3 mm, L = 1.75 mm. From the above data, L = -14.067D. 2 +8.5223D+0.4255(2), Substituting equation (1) into equation (2), we can obtain the relationship between L and I3 as: L=-0.00835I3 2 +0.6479I3+0.4652.

[0042] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0043] Furthermore, the directions such as front, back, left, and right mentioned in this embodiment are only for reference and do not represent the actual directions in use. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A method for controlling the cutter structure of a paper cutter, characterized in that: The cutter structure includes a rotating roller, an elastic element, and an adjustment mechanism; Multiple sets of cutting blade assemblies are sequentially fitted onto the rotating roller along its extension direction, and each cutting blade assembly rotates synchronously with the rotating roller. The elastic element is positioned between adjacent cutter assemblies; The adjustment mechanism is located at one end of the rotating roller and is used to push the cutter assembly to compress the elastic element to reduce the distance between the cutter assemblies, or to release the elastic element to allow the cutter assembly to spring back to increase the distance between the cutter assemblies. The control method includes the following steps: Step 1: Control the adjustment mechanism to prevent it from pushing against the cutter assembly, set the main motor to run at a constant speed V, detect and record the load current I1 of the main motor when no paper is fed, and detect and record the load current I2 of the main motor after the paper is fed. Step 2: By controlling the difference I3 between the load current I2 of the main motor after the paper is fed and the load current I1 of the main motor before the paper is fed, the thickness D of the paper is calculated. Then, the spacing L between each cutter assembly is adjusted according to the thickness D of the paper.

2. The control method for the cutter structure of a paper cutter as described in claim 1, characterized in that: The adjustment mechanism includes an adjusting nut and a drive motor. The drive motor includes a motor shaft and a motor housing. The motor shaft is axially slidably connected to a rotating roller and rotates synchronously with the rotating roller, so that the motor housing is the output end. One end of the adjusting nut is fixedly connected to the motor housing, and the other end is screwed onto the rotating roller, so that when the motor housing rotates, it drives the adjusting nut to move away from or closer to the cutter assembly.

3. The control method for the cutter structure of a paper cutter as described in claim 1, characterized in that: The cutting assembly includes two annular blades and an annular inner blade pad, with the inner blade pad disposed between the two blades to create a gap between them.

4. The control method for the cutter structure of a paper cutter as described in claim 3, characterized in that: An annular outer blade pad is also provided between adjacent cutting blade assemblies. The outer blade pad is located on one side of the elastic element so that there is a gap between adjacent cutting blade assemblies. The gap between adjacent cutting blade assemblies is greater than the sum of the thickness of the two blades and the gap between the two blades.

5. The control method for the cutter structure of a paper cutter as described in claim 4, characterized in that: It also includes a housing, the number of housings corresponding to the number of cutting blade assemblies, and there is a gap between each housing. The housing has a recessed groove, and the cutting blade assembly is placed in the groove. The bottom of the groove has two strip holes corresponding to the positions of the two blades. The length of the strip holes is less than the diameter of the blades, so that the two blades can extend out of the housing.

6. The control method for the cutter structure of a paper cutter as described in claim 5, characterized in that: The outer wall of the casing has a protrusion between the two strip holes. The protrusion is set along the extension direction of the strip holes, and its length is greater than that of the strip holes. The two ends of the protrusion are located outside the two ends of the strip holes, and the protrusion is sloping. Its height is less than the height of the blade, and its two ends are smoothly transitioned to the outer wall of the casing.

7. The control method for the cutter structure of a paper cutter as described in claim 1, characterized in that: The rotating roller is also connected to a main motor, which drives the rotating roller to rotate.

8. The control method for the cutter structure of a paper cutter as described in claim 1, characterized in that: In step one, the main motor runs at a constant speed of 8 m / min. In step two, the relationship between D and I3 is: D = 0.07772 * I3 + 0.0054 (1), and the relationship between L and D is: L = -14.067D. 2 + 8.5223D + 0.4255(2), According to the combination of equations (1) and (2), the relationship between L and I3 is: L = -0.00835I3 2 +0.6479I3+0.4652.

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