Paper shredder with improved automatic paper feeding device and paper feeding method of paper shredder

Abstract

The invention discloses a paper shredder with an improved automatic paper feeding device, a paper shredder head is provided with a vertical paper feeding channel and an automatic side paper feeding channel, the automatic side paper feeding channel is provided with a paper winding mechanism and a paper pressing mechanism, and the paper winding mechanism is provided with an upper paper twisting roller and a lower paper twisting roller. And when the paper rolling mechanism rubs paper, the middle part or the lower part of the paper to be shredded is folded and rolled into the paper rolling gap. The invention also discloses a paper feeding method of the paper shredder, which comprises a paper placing step, a paper pressing step, a paper folding and rolling step, a paper guiding step and a paper shredding step, so that to-be-shredded paper which is obliquely placed is folded and moves towards a paper shredding cutter, the paper feeding stroke of the to-be-shredded paper is shortened, and meanwhile, the to-be-shredded paper is not interfered with the to-be-shredded paper which is vertically inserted; the paper feeding efficiency is improved, and the queue-jumping paper shredding function is achieved. When paper is fed, paper to be shredded is folded, the paper feeding stroke of the paper to be shredded is shortened, every two adjacent pieces of paper to be shredded are overlapped, the paper feeding efficiency is improved, the automatic side paper feeding channel and the vertical paper feeding channel do not interfere with each other, and the function of team cutting and paper shredding can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of paper shredders, and in particular to a paper shredder with an improved automatic paper feeding device and a paper feeding method for the paper shredder. Background Art

[0002] In order to facilitate large-scale shredding, paper shredders are often equipped with automatic paper feeding devices. There are two types of automatic paper feeding devices on existing paper shredders. The first type is to tilt the paper and set it above the shredding cutter, and feed the paper into the shredding cutter one by one through a rubber roller. The second type is to place the paper horizontally above the shredding cutter, and set two relatively rotating rubber rollers between the paper and the shredding cutter. The two rubber rollers fold the paper from the middle of the paper and roll it down to the shredding cutter. The first automatic paper feeding device needs to feed the paper one by one, and paper jams are likely to occur between a single rubber roller and the paper, which not only has a slow paper feeding speed, but is also prone to paper jams. Although the second automatic paper feeding device accelerates the paper feeding speed by folding the paper, the paper is placed horizontally just above the shredding cutter, which results in the shredder having only one paper feeding channel. When shredding in batches, it is impossible to shred a single paper synchronously. When it is necessary to jump in line for shredding, all the stacked papers to be shredded need to be taken out, which is inconvenient to use. Therefore, it is necessary to improve it. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a shredder with an improved automatic paper feeding device and a shredder feeding method, which improves paper feeding efficiency, reduces paper jams, improves safety, and can simultaneously shred single sheets of paper while performing continuous shredding, thereby improving ease of use and facilitating cleaning.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a shredder with an improved automatic paper feeding device, comprising a shredder head, a shredder core and a control circuit, the shredder core and the control circuit are respectively arranged in the shredder head, the shredder core is provided with a shredder cutter and a shredder driving mechanism, the shredder driving mechanism is transmission-connected to the shredder cutter, the control circuit is electrically connected to the shredder driving mechanism, a manual paper feeding inlet and an automatic paper feeding bin are arranged at an interval on the upper part of the shredder head, a pulverizing inlet is arranged on the upper part of the shredder cutter, the pulverizing inlet is located below the manual paper feeding inlet, the manual paper feeding inlet is vertically connected to the pulverizing inlet through a vertical paper feeding channel, an automatic side paper feeding channel is arranged in the automatic paper feeding bin, the automatic side paper feeding channel is obliquely arranged beside the shredder cutter, the lower end of the automatic side paper feeding channel is lower than the top of the pulverizing inlet, a horizontal paper feeding channel is arranged between the automatic side paper feeding channel and the pulverizing inlet, and a paper rolling mechanism is arranged on one side of the horizontal paper feeding channel adjacent to the automatic side paper feeding channel,

[0005] The paper rolling mechanism is provided with an upper paper pickup roller and a lower paper pickup roller, which are arranged from top to bottom along the inclined direction of the automatic side paper feeding channel, and there is a paper rolling gap between the upper paper pickup roller and the lower paper pickup roller. The upper paper pickup roller and the lower paper pickup roller rotate in opposite directions, and the lower paper pickup roller has a paper pickup point E for picking up paper. The paper pickup point E is higher than the lower end of the automatic side paper feeding channel in a direction parallel to the automatic side paper feeding channel. When the paper rolling mechanism picks up paper, the middle or lower part of the paper to be shredded is folded and rolled into the paper rolling gap.

[0006] The automatic side paper feeding passage is provided with a paper pressing mechanism, and the paper pressing mechanism is arranged on the opposite side of the paper rolling mechanism.

[0007] In a further technical solution, the paper pressing mechanism includes a paper feeding detection component, a paper pressing drive component, a paper pressing board and a paper pressing elastic member. The paper feeding detection component is arranged on one side of the automatic side paper feeding channel. The paper feeding detection component and the paper pressing drive component are electrically connected to the control circuit respectively. The paper pressing board is arranged on one side of the automatic side paper feeding channel along the inclination direction of the automatic side paper feeding channel. The paper pressing board is slidably installed on the shredder core and extends into the automatic side paper feeding channel from the outside of the automatic side paper feeding channel. The paper pressing drive component is transmission-connected to the paper pressing board. The paper pressing board moves toward and away from the paper winding mechanism. The paper pressing elastic member is arranged between the paper pressing board and the shredder core to realize driving the paper pressing board to reset toward the paper winding mechanism. The distance between the paper picking point E and the lower end of the automatic side paper feeding channel is set to D. After the paper to be shredded is folded, a folding portion is formed on one side of the paper to be shredded. The length of the folding portion is set to L. The radius of the lower paper picking roller is set to R. D=L+R+compensation coefficient H. The compensation coefficient H is 0.3-0.8cm, and L is 2-10cm.

[0008] In a further technical solution, the paper feed detection assembly includes a light control sensor, which is arranged at the lower part of the automatic side paper feed passage and is electrically connected to the control circuit;

[0009] The paper pressing drive assembly includes a paper pressing drive motor, a paper pressing shaft, a paper pressing drive cam, a paper pressing trigger cam and a paper pressing trigger switch. The paper pressing drive motor is fixedly installed on the shredder core, the paper pressing shaft is rotatably installed on the shredder core, the paper pressing drive motor is drivingly connected with the paper pressing shaft, the paper pressing drive cam and the paper pressing trigger cam are respectively fixedly installed on the paper pressing shaft, the paper pressing trigger switch is electrically connected with the control circuit and is triggered by the paper pressing trigger cam. A driving connection seat and a plurality of slides are arranged on the side of the paper pressing paper away from the automatic side paper feeding channel, each slide is slidably installed on the shredder core, each slide is sleeved with a paper pressing elastic member, the driving connection seat is provided with a slide groove, the slide groove is slidably matched with the paper pressing shaft, and the paper pressing trigger cam is matched with the driving connection seat;

[0010] When the optical control sensor does not sense the paper to be shredded, the flange of the paper pressing driving cam abuts against the driving connection seat, the paper pressing triggering cam abuts against the paper pressing triggering switch, and the paper pressing paper exits the automatic side paper feeding channel;

[0011] When the optical control sensor senses the paper to be shredded, the paper pressing driving cam is separated from the driving connection seat, the paper pressing trigger cam is separated from the paper pressing trigger switch, and the paper pressing paper extends into the automatic side paper feeding channel and presses the paper to be shredded;

[0012] At least two paper feed shafts are rotatably mounted on one side of the paper pressing paper facing the paper rolling mechanism, and the two paper feed shafts are respectively arranged beside the upper paper pickup roller and the lower paper pickup roller.

[0013] In a further technical solution, the shredding drive mechanism includes a shredding drive motor and a shredding drive gear set, the shredding drive motor is fixedly mounted on the shredding core, the shredding drive motor is in transmission connection with the shredding drive gear set, an upper traction drive gear and a lower traction drive gear are respectively arranged at the same end of the upper traction roller and the lower traction roller, the upper traction drive gear and the lower traction drive gear are meshed with each other, and the shredding drive gear set is meshed with the lower traction drive gear;

[0014] An arc-shaped lower guide plate is arranged on the upper part of the paper shredding tool, one side of the lower guide plate extends to the middle of the shredding entrance, a paper guide mechanism is arranged between the paper rolling mechanism and the shredding entrance, and a horizontal paper feeding channel is formed between the paper guide mechanism and the lower guide plate.

[0015] In a further technical solution, the paper guide mechanism includes at least one paper guide rubber roller, which is rotatably installed on the shredder core, and is arranged on the side of the upper paper pickup roller facing the shredder tool. The lower part of the paper guide rubber roller rotates toward the side of the shredder tool, and a paper guide transmission gear is arranged at one end of the paper guide rubber roller, and the paper guide transmission gear is meshed with the lower paper pickup transmission gear.

[0016] In a further technical solution, the paper guiding mechanism includes a paper guiding shell, which is fixedly mounted on the shredder core. The paper guiding shell is provided with at least one paper guiding arc surface, one end of which extends above the paper roll gap and the other end extends above the shredding entrance.

[0017] In a further technical solution, a paper feed mounting slot is provided on the upper part of the shredder head, a paper feed base plate and a paper feed flap are provided in the paper feed mounting slot, the paper feed base plate is movably installed above the shredder core, a locking assembly is provided at the rear part of the paper feed base plate, the locking assembly is locked with the shredder head, a vertical paper feed channel is opened at the front part of the paper feed base plate, the lower part of the paper feed flap is hinged to the rear side of the paper feed mounting slot, a paper box with upper and lower openings is provided on the front side of the paper feed flap, when automatic paper feeding is performed, the lower part of the paper box is aligned with and connected to the automatic side paper feed channel, and when the automatic paper feeding function is not used, the paper feed flap cover is arranged at the rear part of the paper feed mounting slot and seals the automatic side paper feed channel.

[0018] A paper feeding method for a shredder comprises the following steps:

[0019] The paper placing step includes the following sub-steps:

[0020] In the step of placing the paper in the automatic shredding machine, the shredder provides an automatic side paper feeding channel through an automatic paper feeding bin arranged on one side of the manual paper feeding inlet, the lower end of the automatic side paper feeding channel is arranged horizontally staggered with the shredding inlet, and multiple sheets of paper to be shredded are stacked in the automatic side paper feeding channel, and the paper to be shredded forms a paper pile in the automatic side paper feeding channel, and the lower end of the paper pile is located below the shredding inlet of the shredding cutter;

[0021] Manual shredding paper feeding step: inserting the paper to be shredded through the manual paper feeding inlet arranged on the shredder head, and guiding the paper to be shredded to the shredding inlet arranged on the upper part of the shredding cutter through the vertical paper feeding channel;

[0022] In a paper pressing step, after the paper feed sensor detects that a paper pile has entered, the paper pressing driving mechanism drives the paper pressing mechanism to move toward the paper pile and keeps the paper pile pressed against the paper rolling mechanism;

[0023] In the paper folding and rolling step, the upper paper pickup roller of the paper rolling mechanism rotates forward, and the lower paper pickup roller of the paper rolling mechanism rotates reversely. The lower part of the upper paper pickup roller and the upper part of the lower paper pickup roller both rotate from one side of the paper pile toward one side of the paper shredding tool. The lower paper pickup roller has a paper pickup point E for picking up paper. The paper pickup point E is higher than the lower end of the automatic side paper feeding channel in a direction parallel to the automatic side paper feeding channel. The paper rolling mechanism folds the middle and lower part of the paper to be shredded in the automatic side paper feeding channel to form a folded part at the lower part of the paper to be shredded. The folded paper to be shredded is rolled into the horizontal paper feeding channel. Two adjacent paper to be shredded partially overlap after entering the horizontal paper feeding channel. The maximum number of overlapping sheets of paper to be shredded in the horizontal paper feeding channel is more than 3 sheets.

[0024] a paper guiding step, guiding the paper to be shredded which is folded and overlapped by the paper rolling mechanism to the shredding entrance through a transverse paper feeding passage arranged between the automatic side paper feeding passage and the shredding entrance;

[0025] In the paper shredding step, the paper shredding cutter is driven to rotate by the paper shredding driving mechanism to shred the paper to be shredded entering from the shredding inlet into paper scraps.

[0026] In a further technical solution, in the paper folding and rolling step, after the paper rolling mechanism folds and rolls the first paper to be shredded, the first paper to be shredded is first separated from the lower paper pickup roller, the upper paper pickup roller keeps in contact with the first paper to be shredded, the lower paper pickup roller rolls the second paper to be shredded, the front end of the folded portion of the second paper to be shredded is adjacent to or abuts against the end of the folded portion of the first paper to be shredded, so that the second paper to be shredded entering the transverse paper feeding channel partially overlaps with the first paper to be shredded, the lower paper pickup roller separates from the second paper to be shredded again, the lower paper pickup roller rolls the third paper to be shredded, the front end of the folded portion of the third paper to be shredded is adjacent to or abuts against the end of the folded portion of the second paper to be shredded, so that the paper is continuously overlapped and fed, and the transverse paper feeding channel is blocked at the paper feeding side of the transverse paper feeding channel by the upper paper pickup roller and the lower paper pickup roller;

[0027] The upper pickup roller and the lower pickup roller are both located between the middle and lower end of the paper pile, the distance from the pickup point E to the lower end of the paper pile is set to D, the length of the folding portion is set to L, the radius of the lower pickup roller is set to R, D=L+R+compensation coefficient H, the compensation coefficient H is 0.3-0.8cm, L is 2-10cm, and the maximum number of overlapping sheets is 3 to 15 sheets.

[0028] In a further technical solution, in the paper pressing step, when the paper feed sensor detects that there is no paper stack in the automatic side paper feed channel, the paper pressing drive mechanism drives the paper pressing mechanism to move toward a side away from the paper winding mechanism, so that the paper pressing mechanism moves out of the automatic side paper feed channel, and then repeats the paper placing step;

[0029] In the paper shredding step, the paper shredding cutter shreds the paper to be shredded in the vertical paper feeding channel and the paper to be shredded in the automatic side paper feeding channel at the same time;

[0030] In the paper guiding step, the folded and overlapped paper to be shredded passes through the paper rolling mechanism and then abuts against the paper guiding mechanism in the horizontal paper feeding channel, and the paper to be shredded moves along the guiding direction of the paper guiding mechanism toward the shredding inlet of the shredding cutter.

[0031] After adopting the above structure, the advantages of the present invention compared with the prior art are as follows: the paper to be shredded in the automatic side paper feeding channel is rolled into the paper winding gap between the upper paper pickup roller and the lower paper pickup roller from the side, and is folded while being rolled, thereby shortening the paper feeding stroke of the paper to be shredded and accelerating the paper feeding speed; the paper to be shredded is then guided to the shredding inlet of the paper shredding cutter by the paper guide mechanism, so that the automatic side paper feeding channel is located beside the paper shredding cutter, and the shredding inlet is not exposed in the automatic side paper feeding channel, thereby improving safety; the paper winding mechanism is located at the lower part of the paper to be shredded, and when feeding the paper, the paper to be shredded is folded from the position between the middle part and the lower end part and rolled into the paper winding gap, and when the folded part of the paper to be shredded is separated from the lower paper pickup roller, the next paper to be shredded is passed through the lower paper pickup roller. The roller is wound into the gap between the paper rolls, so that two adjacent papers to be shredded overlap when feeding, so as to further improve the paper feeding efficiency; the paper feeding detection component detects whether there is paper to be shredded in the automatic side paper feeding channel, so as to control the paper pressing drive component to drive the paper pressing plate to move, so that the paper to be shredded is pressed against the paper rolling mechanism when feeding, and the paper to be shredded is avoided when putting the paper, without manual operation, so as to improve the operation convenience; and when a paper jam occurs, it is convenient to move the paper pressing plate out of the automatic side paper feeding channel for cleaning; when continuous paper shredding is performed, a single sheet or a small amount of paper to be shredded is directly inserted into the shredding entrance through the vertical paper feeding channel, so that the automatic side paper feeding channel and the vertical paper feeding channel feed paper at the same time, so as to realize the queue-jumping paper shredding function, and further improve the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure inside the shredder head of the present invention;

[0035] Figure 3 It is a schematic diagram of the state of the paper pressing mechanism when there is paper in the automatic side paper feeding channel of the present invention;

[0036] Figure 4 It is a schematic diagram of the state of the paper pressing mechanism when there is no paper in the automatic side paper feeding channel of the present invention;

[0037] Figure 5 It is a schematic diagram of the state of continuous feeding of the paper to be shredded after being folded according to the present invention;

[0038] Figure 6 It is a cross-sectional view of the paper guide mechanism of the present invention using a paper guide rubber roller when continuously feeding paper;

[0039] Figure 7 The present invention Figure 6 A magnified view of part A;

[0040] Figure 8 is a cross-sectional view of the paper guide mechanism of the present invention using a paper guide housing when continuously feeding paper;

[0041] Fig. 9 The present invention Figure 8 Enlarged view of part B.

[0042] In the figure:

[0043] 1 shredder head, 11 paper feed installation slot, 12 paper feed bottom plate, 13 locking assembly, 14 paper feed flap, 15 paper tray;

[0044] 2 a paper shredder core, 21 a paper shredder cutter, 211 a shredding inlet, 22 a lower guide plate;

[0045] 31 vertical paper feed channel, 311 manual paper feed entrance, 32 automatic side paper feed channel;

[0046] 41 shredder driving gear set;

[0047] 51 upper paper pickup roller, 511 upper paper pickup transmission gear, 52 lower paper pickup roller, 521 lower paper pickup transmission gear;

[0048] 6 paper pressing mechanism, 61 paper feeding detection component, 62 paper pressing drive motor, 63 paper feeding shaft, 64 paper pressing drive cam, 65 paper pressing trigger cam, 66 paper pressing trigger switch, 67 paper pressing board, 671 paper pressing shaft, 672 drive connecting seat, 673 slide groove, 674 slide column, 68 paper pressing elastic member;

[0049] 7 paper guide mechanism, 71 paper guide rubber roller, 711 paper guide transmission gear, 72 paper guide housing, 721 paper guide arc surface;

[0050] 8. Paper pile, 81. Paper to be shredded, 811. Folding section. DETAILED DESCRIPTION

[0051] The following are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

[0052] A paper shredder with an improved automatic paper feeding device, such as Figures 1 to 9 As shown, it includes a shredder head 1, a shredder core 2 and a control circuit. The shredder core 2 and the control circuit are respectively arranged in the shredder head 1. The shredder core 2 is provided with a shredder cutter 21 and a shredder driving mechanism. The shredder driving mechanism is transmission-connected to the shredder cutter 21. The control circuit is electrically connected to the shredder driving mechanism. A manual paper feed inlet 311 and an automatic paper feed bin are arranged at an upper portion of the shredder head 1. The manual paper feed inlet 311 and the automatic paper feed bin are arranged at intervals. A crushing inlet 211 is arranged at the upper portion of the shredder cutter 21. The crushing inlet 211 is located below the manual paper feed inlet 311. The manual paper feed inlet 311 is vertically connected to the crushing inlet 211 through a vertical paper feed channel 31. An automatic side paper feed channel 32 is arranged in the automatic paper feed bin. The automatic side paper feed channel 32 is obliquely arranged beside the shredder cutter 21. The lower end of the automatic side paper feed channel 32 is lower than the crushing inlet. At the top of the opening 211, a horizontal paper feeding channel is arranged between the automatic side paper feeding channel 32 and the shredding entrance 211, and a paper winding mechanism is arranged on one side of the horizontal paper feeding channel adjacent to the automatic side paper feeding channel 32. The paper winding mechanism is provided with an upper paper pickup roller 51 and a lower paper pickup roller 52. The upper paper pickup roller 51 and the lower paper pickup roller 52 are arranged from top to bottom along the inclined direction of the automatic side paper feeding channel 32, and there is a paper winding gap between the upper paper pickup roller 51 and the lower paper pickup roller 52. The upper paper pickup roller 51 and the lower paper pickup roller 52 rotate in opposite directions. The lower paper pickup roller 52 has a paper pickup point E for paper pickup, and the paper pickup point E along the direction parallel to the automatic side paper feeding channel 32 is higher than the lower end portion of the automatic side paper feeding channel 32. When the paper winding mechanism picks up the paper, the middle or lower part of the paper to be shredded 81 is folded and rolled into the paper winding gap. The automatic side paper feeding channel 32 is provided with a paper pressing mechanism 6, and the paper pressing mechanism 6 is arranged on the opposite side of the paper winding mechanism.

[0053] In a conventional shredder with continuous paper feeding, when the paper is tilted, only single sheets of paper can be fed in one by one, and the feeding stroke of the paper 81 to be shredded is the same as the total length of the paper 81 to be shredded. In a shredder with horizontally placed paper, although the paper 81 to be shredded can be folded from the middle of the paper 81 to be shredded and rolled into the shredding entrance 211, the paper 81 to be shredded completely blocks the shredding entrance 211, and the queue-jumping shredding function cannot be realized. In the automatic side paper feeding channel 32 of the present invention, the paper 81 to be shredded is rolled into the paper winding gap between the upper paper pickup roller 51 and the lower paper pickup roller 52 from the side, and is folded while being rolled in, thereby shortening the feeding stroke of the paper 81 to be shredded and accelerating the paper feeding speed. Then, the paper 81 to be shredded is guided to the shredding entrance 211 of the paper shredding cutter 21 through the horizontal paper feeding channel, so that the automatic side paper feeding channel 32 is located beside the paper shredding cutter 21, and the paper winding gap 211 is completely blocked by the paper shredding cutter 21. The mechanism isolates the paper feeding side of the horizontal paper feeding channel to prevent the paper shredding cutter 21 from being exposed in the automatic side paper feeding channel 32, thereby improving safety; the paper rolling mechanism is located at the lower part of the paper to be shredded 81, and when feeding the paper, the paper to be shredded 81 is folded from the position between the middle and the lower end and rolled into the paper rolling gap. When the folded portion 811 of the paper to be shredded 81 is separated from the lower paper pickup roller 52, the next paper to be shredded 81 is rolled into the paper rolling gap by the lower paper pickup roller 52, so that two adjacent papers to be shredded 81 are overlapped during paper feeding, so as to further improve the paper feeding efficiency; when performing continuous paper shredding, a single sheet or a small amount of paper to be shredded 81 is directly inserted into the shredding entrance 211 through the vertical paper feeding channel 31, so that the automatic side paper feeding channel 32 and the vertical paper feeding channel 31 feed paper at the same time, realizing the queue-jumping paper shredding function, and further improving the convenience of use.

[0054] Specifically, the paper pressing mechanism 6 includes a paper feed detection component 61, a paper pressing drive component, a paper pressing plate 67 and a paper pressing elastic member 68. The paper feed detection component 61 is arranged on one side of the automatic side paper feed channel 32. The paper feed detection component 61 and the paper pressing drive component are electrically connected to the control circuit respectively. The paper pressing plate 67 is arranged on one side of the automatic side paper feed channel 32 along the inclined direction of the automatic side paper feed channel 32. The paper pressing plate 67 is slidably installed on the shredder core 2 and extends from the outer side of the automatic side paper feed channel 32 into the automatic side paper feed channel 32. The paper pressing drive component is connected to the paper pressing plate 67 in transmission. The paper pressing plate 67 The paper pressing elastic member 68 moves toward and away from the paper rolling mechanism, and is disposed between the paper pressing plate 67 and the paper shredder core 2 to realize driving the paper pressing plate 67 to reset toward the paper rolling mechanism. The paper feeding detection component 61 detects whether there is paper 81 to be shredded in the automatic side paper feeding channel 32, thereby controlling the paper pressing driving component to drive the paper pressing plate 67 to move, so that the paper 81 to be shredded is pressed against the paper rolling mechanism when feeding paper, and avoids the paper 81 to be shredded when putting paper, without manual operation, thereby improving the convenience of operation; and when a paper jam occurs, it is convenient to move the paper pressing plate 67 out of the automatic side paper feeding channel 32 for cleaning;

[0055] The distance between the paper pickup point E and the lower end of the automatic side paper feeding channel 32 is set to D. After the paper 81 to be shredded is folded, a folding portion 811 is formed on one side of the paper 81 to be shredded. The length of the folding portion 811 is set to L. The radius of the lower paper pickup roller 52 is set to R. D=L+R+compensation coefficient H. The compensation coefficient H is 0.3-0.8 cm, and L is 2-10 cm. Since the folding is performed at the middle and lower parts of the paper sheets 81 to be shredded, after each paper sheet 81 to be shredded enters the horizontal paper feeding channel, two adjacent paper sheets 81 to be shredded partially overlap, and the maximum overlapping number of paper sheets 81 to be shredded in the horizontal paper feeding channel is more than 3 sheets. The maximum overlapping number of paper sheets is adjusted by controlling the distance between the paper rubbing point E and the lower end of the automatic side paper feeding channel 32. Preferably, the maximum overlapping number of paper sheets is 3-15 sheets. When shredding A4-sized paper sheets 81 to be shredded, when the maximum overlapping number of paper sheets is 3 sheets, L=2 cm; when the maximum overlapping number of paper sheets is 5 sheets, L=3.34 cm; when the maximum overlapping number of paper sheets is 10 sheets, L=6.67 cm; when the maximum overlapping number of paper sheets is 15 sheets, L=10 cm.

[0056] Specifically, the paper feed detection component 61 includes a light control sensor, which is arranged at the lower part of the automatic side paper feed channel 32 and is electrically connected to the control circuit; the paper pressing drive component includes a paper pressing drive motor 62, a paper pressing shaft 671, a paper pressing drive cam 64, a paper pressing trigger cam 65 and a paper pressing trigger switch 66, the paper pressing drive motor 62 is fixedly installed on the paper shredder core 2, the paper pressing shaft 671 is rotatably installed on the paper shredder core 2, the paper pressing drive motor 62 is transmission-connected with the paper pressing shaft 671, the paper pressing drive cam 64 and the paper pressing trigger cam 65 are respectively fixedly installed on the paper pressing shaft 671, the paper pressing trigger switch 66 is electrically connected to the control circuit and is triggered and cooperated with the paper pressing trigger cam 65, and a driving connection seat 672 and a plurality of slide columns are provided on the side of the paper pressing paper 67 away from the automatic side paper feed channel 32. 674, each slide post 674 is slidably installed on the shredder core 2, each slide post 674 is sleeved with a paper pressing elastic member 68, the driving connection seat 672 is provided with a slide groove 673, the slide groove 673 is slidably matched with the paper pressing shaft 671, and the paper pressing trigger cam 65 is abutted against the driving connection seat 672; when the light control sensor does not sense the paper to be shredded 81, the paper pressing driving motor 62 runs, driving the paper pressing shaft 671 to rotate, until the flange of the paper pressing driving cam 64 abuts against the driving connection seat 672, and the driving connection seat 672 is away from the paper rolling mechanism, so that the paper pressing paper 67 moves out of the automatic side paper feeding channel 32, and at this time, the paper pressing trigger cam 65 abuts against the paper pressing trigger switch 66, thereby stopping the paper pressing driving motor 62, so that the flange of the paper pressing driving cam 64 keeps abutting against the driving connection seat 672;

[0057] When the light-controlled sensor senses the paper 81 to be shredded, the paper pressing drive motor 62 runs again for a preset time and then stops, driving the paper pressing shaft 671 to rotate until the paper pressing drive cam 64 is separated from the drive connecting seat 672, thereby releasing the drive connecting seat 672, and the paper pressing paper 67 moves toward the paper winding mechanism under the action of the paper pressing elastic member 68 and extends into the automatic side paper feeding channel 32, thereby pressing the paper pile 8 against the paper winding mechanism, thereby realizing automatic driving of the paper pressing paper 67, without manual operation, with a simple structure, low cost and high convenience.

[0058] At least two paper feed shafts 63 are rotatably mounted on one side of the paper pressing plate 67 facing the paper winding mechanism, and the two paper feed shafts 63 are respectively arranged beside the upper paper pickup roller 51 and the lower paper pickup roller 52. The paper feed shafts 63 contact the paper to be shredded 81, thereby reducing the friction between the paper pressing plate 67 and the paper to be shredded 81, reducing the paper feeding resistance, and further preventing paper jams.

[0059] Specifically, the shredding drive mechanism includes a shredding drive motor and a shredding drive gear set 41. The shredding drive motor is fixedly installed on the shredding core 2. The shredding drive motor is connected to the shredding drive gear set 41 in transmission. An upper rubbing drive gear 511 and a lower rubbing drive gear 521 are respectively provided at the same end of the upper rubbing roller 51 and the lower rubbing roller 52. The upper rubbing drive gear 511 and the lower rubbing drive gear 521 are meshed with each other. The shredding drive gear set 41 is meshed with the lower rubbing drive gear 521. An arc-shaped lower guide plate 22 is provided on the upper part of the shredding cutter 21. One side of the lower guide plate 22 extends to the middle part of the shredding entrance 211. A paper guide mechanism 7 is provided between the paper rolling mechanism and the shredding entrance 211. A horizontal paper feeding channel is formed between the paper guide mechanism 7 and the lower guide plate 22. The upper pickup roller 51 and the lower pickup roller 52 are driven by the shredding drive mechanism, and no independent drive mechanism is required, so the structure is simple and the cost is low; the paper 81 to be shredded is guided by the paper guide mechanism and then guided by the lower guide plate 22 for a second time, so as to improve the success rate of the paper 81 to be shredded entering the shredding entrance 211, avoid paper jam, and improve reliability and stability. The upper pickup roller 51 and the lower pickup roller 52 separate the paper feeding side of the horizontal paper feeding channel, thereby blocking the automatic side paper feeding channel 32 and the shredding entrance 211, so as to prevent foreign objects or fingers from being inserted into the shredding entrance 211, and improve safety.

[0060] Specifically, the paper guide mechanism 7 includes at least one paper guide rubber roller 71, which is rotatably mounted on the shredder core 2, and is disposed on the side of the upper pickup roller 51 facing the shredder cutter 21. The lower portion of the paper guide rubber roller 71 rotates toward the side of the shredder cutter 21. A paper guide transmission gear 711 is disposed at one end of the paper guide rubber roller 71, and the paper guide transmission gear 711 is meshed with the lower pickup transmission gear 521. The paper 81 to be shredded is dynamically guided by the paper guide rubber roller 71, and the rotation direction of the paper guide rubber roller 71 is the same as that of the upper pickup roller 51. The paper guide rubber roller 71 is driven by the lower pickup roller 52, and no additional driving mechanism is required. Moreover, active rotation can improve the guiding success rate and guiding efficiency.

[0061] Specifically, the paper guide mechanism 7 includes a paper guide housing 72, which is fixedly mounted on the shredder core 2. The paper guide housing 72 is provided with at least one paper guide arc surface 721, one end of which extends to the top of the paper roll gap, and the other end extends to the top of the shredding inlet 211. The paper guide housing 72 is used to statically guide the paper 81 to be shredded, and the paper 81 to be shredded moves along the paper guide arc surface 721 to the shredding inlet 211, which has a simple structure and low cost.

[0062] Specifically, a paper feed installation slot 11 is provided at the upper portion of the shredder head 1, and a paper feed base plate 12 and a paper feed flap 14 are provided in the paper feed installation slot 11. The paper feed base plate 12 is movably installed above the shredder core 2, and a locking assembly 13 is provided at the rear portion of the paper feed base plate 12, and the locking assembly 13 is locked with the shredder head 1, a vertical paper feed channel 31 is opened at the front portion of the paper feed base plate 12, and the lower portion of the paper feed flap 14 is hinged to the rear side of the paper feed installation slot 11, and a paper placement box 15 with upper and lower openings is provided on the front side surface of the paper feed flap 14. When automatic paper feeding is performed, the lower portion of the paper placement box 15 is aligned with and connected to the automatic side paper feed channel 32, and when the automatic paper feeding function is not used, the paper feed flap 14 is covered at the rear portion of the paper feed installation slot 11 and seals the automatic side paper feed channel 32. The paper feed bottom plate 12 is detachably mounted on the shredder head 1 through a locking assembly 13. The paper feed bottom plate 12 can cover the shredder core 2, protect the internal structure of the shredder core 2, and facilitate disassembly. The vertical paper feed channel 31 is arranged on the paper feed bottom plate 12. When a paper jam occurs, the paper feed bottom plate 12 is easily disassembled to expose the shredding entrance 211 on the paper feed installation slot 11, so as to facilitate the cleaning of the paper jam. When performing continuous shredding, the paper feed flap 14 is flipped open, so that the inclination angle of the paper feed flap 14 is similar to the inclination angle of the automatic side paper feed channel 32, and the paper pile 8 is inserted from the paper box 15 into the automatic side paper feed channel 32, thereby shortening the length of the automatic side paper feed channel 32. When the continuous shredding function is not used, the paper feed flap 14 is covered and the automatic side paper feed channel 32 is sealed, which not only reduces the height of the whole machine, but also protects the shredder core 2.

[0063] A paper feeding method for a shredder comprises the following steps:

[0064] The paper placing step includes the following sub-steps:

[0065] In the step of placing the paper in the automatic shredding process, the shredder provides an automatic side paper feeding channel 32 through an automatic paper feeding bin arranged on one side of the manual paper feeding inlet 311, and the lower end of the automatic side paper feeding channel 32 is arranged horizontally staggered with the shredding inlet 211, and a plurality of sheets of paper 81 to be shredded are stacked in the automatic side paper feeding channel 32, and the sheets of paper 81 to be shredded form a paper pile 8 in the automatic side paper feeding channel 32, and the lower end of the paper pile 8 is located below the shredding inlet 211 of the shredding cutter 21;

[0066] When a single sheet or a small amount of to-be-shredded paper 81 needs to be prioritized for shredding during continuous shredding, the manual shredding paper placing step is performed, and a single sheet or a small amount of stacked to-be-shredded paper 81 is inserted into the vertical paper feeding channel 31 through the shredding entrance 211. The vertical paper feeding channel 31 guides the to-be-shredded paper 81 to the shredding entrance 211. The to-be-shredded paper 81 in the vertical paper feeding channel 31 and the to-be-shredded paper 81 in the automatic side paper feeding channel 32 enter the shredding entrance 211 at the same time, so as to realize the shredding function of queue jumping.

[0067] In the paper pressing step, after the paper feed sensor detects that the paper pile 8 enters, the paper pressing driving mechanism drives the paper pressing mechanism 6 to move toward the paper pile 8 and keeps the paper pile 8 pressed against the paper winding mechanism; when the paper feed sensor detects that there is no paper pile 8 in the automatic side paper feed passage 32, the paper pressing driving mechanism drives the paper pressing mechanism 6 to move toward the side away from the paper winding mechanism, so that the paper pressing mechanism 6 moves out of the automatic side paper feed passage 32, and then repeats the paper placing step;

[0068] In the step of folding and rolling paper, the upper paper pickup roller 51 of the paper rolling mechanism rotates forward, and the lower paper pickup roller 52 of the paper rolling mechanism rotates reversely. The lower part of the upper paper pickup roller 51 and the upper part of the lower paper pickup roller 52 rotate from one side of the paper pile 8 toward one side of the paper shredding cutter 21. The lower paper pickup roller 52 has a paper pickup point E for picking up paper. The paper pickup point E is higher than the lower end of the automatic side paper feeding channel 32 in a direction parallel to the automatic side paper feeding channel 32. The paper rolling mechanism folds the middle and lower part of the paper to be shredded 81 in the automatic side paper feeding channel 32, and forms a folding part 811 at the lower part of the paper to be shredded 81. The folded paper to be shredded 81 is rolled into the horizontal paper feeding channel. Two adjacent paper to be shredded 81 partially overlap after entering the horizontal paper feeding channel. The maximum number of overlapping sheets of paper to be shredded 81 in the horizontal paper feeding channel is more than 3 sheets.

[0069] After the paper reel mechanism folds and rolls up the first sheet of paper to be shredded 81, the first sheet of paper to be shredded 81 is first separated from the lower pickup roller 52, the upper pickup roller 51 keeps in contact with the first sheet of paper to be shredded 81, and the lower pickup roller 52 rolls the second sheet of paper to be shredded 81, the front end of the folded portion 811 of the second sheet of paper to be shredded 81 is adjacent to or abuts against the end of the folded portion 811 of the first sheet of paper to be shredded 81, so that the second sheet of paper to be shredded 81 entering the transverse paper feeding channel partially overlaps with the first sheet of paper to be shredded 81, the lower pickup roller 52 separates from the second sheet of paper to be shredded 81 again, and the lower pickup roller 52 rolls the third sheet of paper to be shredded 81, the front end of the folded portion 811 of the third sheet of paper to be shredded 81 is adjacent to or abuts against the end of the folded portion 811 of the second sheet of paper to be shredded 81, so that the paper is continuously overlapped and the transverse paper feeding channel is blocked at the paper feeding side of the transverse paper feeding channel by the upper pickup roller 51 and the lower pickup roller 52;

[0070] The upper pickup roller 51 and the lower pickup roller 52 are both located between the middle and the lower end of the paper pile 8, the distance between the pickup point E and the lower end of the paper pile 8 is set to D, the length of the folding portion 811 is set to L, the radius of the lower pickup roller 52 is set to R, D = L + R + compensation coefficient H, the compensation coefficient H is 0.3-0.8 cm, L is 2-10 cm, and the maximum number of overlapping sheets is 3 to 15 sheets. When shredding A4-sized paper 81 to be shredded, when the maximum number of overlapping sheets is 3 sheets, L = 2 cm; when the maximum number of overlapping sheets is 5 sheets, L = 3.34 cm; when the maximum number of overlapping sheets is 10 sheets, L = 6.67 cm; when the maximum number of overlapping sheets is 15 sheets, L = 10 cm.

[0071] In the paper guiding step, the paper to be shredded 81 folded and overlapped by the paper rolling mechanism is guided to the shredding entrance 211 through the transverse paper feeding channel provided between the automatic side paper feeding channel 32 and the shredding entrance 211; the folded and overlapped paper to be shredded 81 passes through the paper rolling mechanism and abuts against the paper guiding mechanism 7 in the transverse paper feeding channel, and the paper to be shredded 81 moves along the guiding direction of the paper guiding mechanism 7 toward the shredding entrance 211 of the paper shredding cutter 21.

[0072] The paper guide mechanism 7 adopts a paper guide rubber roller 71 or a paper guide curved surface 721, such as Figure 6 and Figure 7 As shown, when the paper guide mechanism 7 adopts the paper guide rubber roller 71, the paper to be shredded 81 moves out of the paper winding mechanism and abuts against the paper guide rubber roller 71. The rotation direction of the paper guide rubber roller 71 is the same as the rotation direction of the upper pickup roller 51. The paper guide rubber roller 71 changes the moving direction of the paper to be shredded 81, so that the paper to be shredded 81 moves toward the shredding entrance 211; Figure 8 and Fig. 9 As shown, when the paper guide mechanism 7 adopts the paper guide arc surface 721, one end of the paper guide arc surface 721 extends to the side of the paper winding mechanism, and the other end extends to the top of the shredding entrance 211. After the shredded paper 81 moves out of the paper winding mechanism, it moves along the paper guide arc surface 721 toward the shredding entrance 211.

[0073] In the shredding step, the shredding cutter 21 is driven to rotate by the shredding drive mechanism to shred the paper 81 to be shredded entering from the shredding entrance 211 into paper scraps. The shredding cutter 21 shreds the paper 81 to be shredded in the vertical paper feeding channel 31 and the paper 81 to be shredded in the automatic side paper feeding channel 32 at the same time.

[0074] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A shredder with an improved automatic paper feeding device, comprising a shredder head (1), a shredder core (2) and a control circuit, wherein the shredder core (2) and the control circuit are respectively arranged in the shredder head (1), the shredder core (2) is provided with a shredder blade (21) and a shredder driving mechanism, the shredder driving mechanism is transmission-connected to the shredder blade (21), and the control circuit is electrically connected to the shredder driving mechanism, characterized in that: A manual paper feed inlet (311) and an automatic paper feed bin are arranged at an interval on the upper part of the shredder head (1). The manual paper feed inlet (311) and the automatic paper feed bin are arranged at an interval. A crushing inlet (211) is arranged at the upper part of the shredder blade (21). The crushing inlet (211) is located below the manual paper feed inlet (311). The manual paper feed inlet (311) is vertically connected to the crushing inlet (211) through a vertical paper feed channel (31). An automatic side paper feed channel (32) is arranged in the automatic paper feed bin. The automatic side paper feed channel (32) is arranged obliquely on the side of the shredder blade (21). The lower end of the automatic side paper feed channel (32) is lower than the top of the crushing inlet (211). A horizontal paper feed channel is arranged between the automatic side paper feed channel (32) and the crushing inlet (211). A paper rolling mechanism is arranged on one side of the horizontal paper feed channel adjacent to the automatic side paper feed channel (32). The paper rolling mechanism is provided with an upper paper picking roller (51) and a lower paper picking roller (52), the upper paper picking roller (51) and the lower paper picking roller (52) are arranged from top to bottom along the inclined direction of the automatic side paper feeding channel (32), a paper rolling gap is provided between the upper paper picking roller (51) and the lower paper picking roller (52), the upper paper picking roller (51) and the lower paper picking roller (52) rotate in opposite directions, the lower paper picking roller (52) has a paper picking point E for picking up paper, the paper picking point E is higher than the lower end of the automatic side paper feeding channel (32) along the direction parallel to the automatic side paper feeding channel (32), when the paper rolling mechanism picks up paper, the middle or lower part of the paper to be shredded (81) is folded and rolled into the paper rolling gap, The automatic side paper feeding channel (32) is provided with a paper pressing mechanism (6), and the paper pressing mechanism (6) is arranged on the opposite side of the paper rolling mechanism.

2. A paper shredder with an improved automatic paper feeding device according to claim 1, characterized in that: The paper pressing mechanism (6) comprises a paper feed detection component (61), a paper pressing drive component, a paper pressing board (67) and a paper pressing elastic member (68). The paper feed detection component (61) is arranged on one side of the automatic side paper feed passage (32). The paper feed detection component (61) and the paper pressing drive component are electrically connected to the control circuit respectively. The paper pressing board (67) is arranged on one side of the automatic side paper feed passage (32) along the inclined direction of the automatic side paper feed passage (32). The paper pressing board (67) is slidably mounted on the shredder core (2) and extends from the outer side of the automatic side paper feed passage (32) into the automatic side paper feed passage (32). The paper pressing drive component and the paper pressing board (67) are electrically connected to each other. The paper pressing paper (67) is dynamically connected to the paper rolling mechanism, the paper pressing paper (67) moves toward and away from the paper rolling mechanism, the paper pressing elastic member (68) is arranged between the paper pressing paper (67) and the paper shredder core (2) to realize driving the paper pressing paper (67) to reset toward the paper rolling mechanism, the distance between the paper picking point E and the lower end of the automatic side paper feeding channel (32) is set to D, the paper to be shredded (81) is folded to form a folding portion (811) on one side of the paper to be shredded (81), the length of the folding portion (811) is set to L, the radius of the lower paper picking roller (52) is set to R, D = L + R + compensation coefficient H, the compensation coefficient H is 0.3-0.8 cm, and L is 2-10 cm.

3. A paper shredder with an improved automatic paper feeding device according to claim 2, characterized in that: The paper feed detection component (61) comprises a light control sensor, which is arranged at the lower part of the automatic side paper feed passage (32) and is electrically connected to the control circuit; The paper pressing drive assembly comprises a paper pressing drive motor (62), a paper pressing rotating shaft (671), a paper pressing drive cam (64), a paper pressing trigger cam (65) and a paper pressing trigger switch (66); the paper pressing drive motor (62) is fixedly mounted on the paper shredder core (2); the paper pressing rotating shaft (671) is rotatably mounted on the paper shredder core (2); the paper pressing drive motor (62) is transmission-connected to the paper pressing rotating shaft (671); the paper pressing drive cam (64) and the paper pressing trigger cam (65) are respectively fixedly mounted on the paper pressing rotating shaft (671); the paper pressing trigger switch (66) is connected to the control circuit The paper pressing trigger cam (65) is electrically connected and is triggered and matched. A driving connection seat (672) and a plurality of slide posts (674) are arranged on the side of the paper pressing paper (67) away from the automatic side paper feeding channel (32). Each slide post (674) is slidably installed on the paper shredder core (2). Each slide post (674) is sleeved with a paper pressing elastic member (68). The driving connection seat (672) is provided with a slide groove (673). The slide groove (673) is slidably matched with the paper pressing rotating shaft (671). The paper pressing trigger cam (65) is abutted and matched with the driving connection seat (672). When the optical control sensor does not sense the paper to be shredded (81), the flange of the paper pressing driving cam (64) abuts against the driving connecting seat (672), the paper pressing triggering cam (65) abuts against the paper pressing triggering switch (66), and the paper pressing paper (67) exits the automatic side paper feeding channel (32); When the optical control sensor senses the paper to be shredded (81), the paper pressing driving cam (64) is separated from the driving connection seat (672), the paper pressing trigger cam (65) is separated from the paper pressing trigger switch (66), and the paper pressing board (67) extends into the automatic side paper feeding channel (32) and presses the paper to be shredded (81); At least two paper feed shafts (63) are rotatably mounted on one side of the paper pressing paper (67) facing the paper rolling mechanism. The two paper feed shafts (63) are respectively arranged beside the upper paper pickup roller (51) and the lower paper pickup roller (52).

4. A paper shredder with an improved automatic paper feeding device according to claim 1, characterized in that: The paper shredding driving mechanism comprises a paper shredding driving motor and a paper shredding driving gear set (41), the paper shredding driving motor is fixedly mounted on the paper shredding core (2), the paper shredding driving motor is transmission-connected to the paper shredding driving gear set (41), an upper paper shredding driving gear (511) and a lower paper shredding driving gear (521) are respectively arranged at the same end of the upper paper shredding roller (51) and the lower paper shredding roller (52), the upper paper shredding driving gear (511) and the lower paper shredding driving gear (521) are meshed with each other, and the paper shredding driving gear set (41) is meshed with the lower paper shredding driving gear (521); An arc-shaped lower guide plate (22) is arranged on the upper part of the paper shredding cutter (21), one side of the lower guide plate (22) extends to the middle of the shredding inlet (211), a paper guide mechanism (7) is arranged between the paper rolling mechanism and the shredding inlet (211), and the horizontal paper feeding channel is formed between the paper guide mechanism (7) and the lower guide plate (22).

5. A paper shredder with an improved automatic paper feeding device according to claim 4, characterized in that: The paper guide mechanism (7) comprises at least one paper guide rubber roller (71), which is rotatably mounted on the paper shredder core (2), and is arranged on a side of the upper paper pickup roller (51) facing the paper shredder tool (21). The lower part of the paper guide rubber roller (71) rotates toward the side of the paper shredder tool (21), and a paper guide transmission gear (711) is arranged at one end of the paper guide rubber roller (71), and the paper guide transmission gear (711) is meshed with the lower paper pickup transmission gear (521).

6. A paper shredder with an improved automatic paper feeding device according to claim 4, characterized in that: The paper guide mechanism (7) comprises a paper guide housing (72), which is fixedly mounted on the paper shredder core (2), and the paper guide housing (72) is provided with at least one paper guide arc surface (721), one end of which extends to the top of the paper roll gap, and the other end of which extends to the top of the shredding inlet (211).

7. A paper shredder with an improved automatic paper feeding device according to any one of claims 1 to 6, characterized in that: The upper part of the shredder head (1) is provided with a paper feed installation slot (11), and a paper feed bottom plate (12) and a paper feed flap (14) are provided in the paper feed installation slot (11). The paper feed bottom plate (12) is movably installed above the shredder core (2), and a locking assembly (13) is provided at the rear of the paper feed bottom plate (12). The locking assembly (13) is locked with the shredder head (1), and the vertical paper feed channel (31) is opened on the paper feed bottom plate (1 2), the lower part of the paper feed flap (14) is hinged to the rear side of the paper feed installation slot (11), and the front side of the paper feed flap (14) is provided with a paper placing box (15) with upper and lower openings. When automatic paper feeding is performed, the lower part of the paper placing box (15) is aligned with and communicated with the automatic side paper feeding channel (32). When the automatic paper feeding function is not used, the paper feed flap (14) is covered at the rear part of the paper feed installation slot (11) and seals the automatic side paper feeding channel (32).

8. A paper feeding method for a shredder, comprising using the improved automatic paper feeding device of any one of claims 1 to 7, characterized in that: The following steps are included: The paper placing step includes the following sub-steps: In the automatic shredding and paper placing step, the shredder provides an automatic side paper feeding channel (32) through an automatic paper feeding bin arranged on one side of the manual paper feeding inlet (311), the lower end of the automatic side paper feeding channel (32) is arranged horizontally staggered with the shredding inlet (211), and a plurality of sheets of paper (81) to be shredded are stacked in the automatic side paper feeding channel (32), the sheets of paper (81) to be shredded form a paper pile (8) in the automatic side paper feeding channel (32), and the lower end of the paper pile (8) is located below the shredding inlet (211) of the shredding cutter (21); A manual shredding paper feeding step, wherein the shredder inserts the paper (81) to be shredded through a manual paper feeding inlet (311) arranged on the shredder head (1), and guides the paper (81) to be shredded to a shredding inlet (211) arranged on the upper part of the shredding blade (21) through the vertical paper feeding channel (31); A paper pressing step, after the paper feed sensor detects that a paper pile (8) has entered, the paper pressing drive mechanism drives the paper pressing mechanism (6) to move toward the paper pile (8) and keeps the paper pile (8) pressed against the paper rolling mechanism; The paper folding and rolling step comprises: the upper paper rubbing roller (51) of the paper rolling mechanism rotates forwardly, and the lower paper rubbing roller (52) of the paper rolling mechanism rotates reversely; the lower part of the upper paper rubbing roller (51) and the upper part of the lower paper rubbing roller (52) both rotate from one side of the paper pile (8) toward one side of the paper shredding knife (21); the lower paper rubbing roller (52) has a paper rubbing point E for rubbing paper; the paper rubbing point E is higher than the lower end of the automatic side paper feeding channel (32) in a direction parallel to the automatic side paper feeding channel (32); the paper rolling mechanism folds the middle and lower part of the paper to be shredded (81) in the automatic side paper feeding channel (32) in half, and forms a folding part (811) at the lower part of the paper to be shredded (81); the folded paper to be shredded (81) is rolled into the horizontal paper feeding channel; two adjacent paper to be shredded (81) partially overlap after entering the horizontal paper feeding channel; and the maximum number of overlapping sheets of paper to be shredded (81) in the horizontal paper feeding channel is more than 3 sheets; a paper guiding step, guiding the to-be-shredded paper (81) folded and overlapped by the paper rolling mechanism to the shredding entrance (211) through a transverse paper feeding passage arranged between the automatic side paper feeding passage (32) and the shredding entrance (211); In the paper shredding step, the paper shredding cutter (21) is driven to rotate by the paper shredding driving mechanism to shred the paper (81) to be shredded entering from the shredding inlet (211) into paper scraps.

9. A paper feeding method for a paper shredder according to claim 8, characterized in that: In the paper folding and rolling step, after the paper rolling mechanism folds and rolls the first paper to be shredded (81), the first paper to be shredded (81) is first separated from the lower paper pickup roller (52), the upper paper pickup roller (51) keeps in contact with the first paper to be shredded (81), and the lower paper pickup roller (52) rubs the second paper to be shredded (81), and the front end of the folded portion (811) of the second paper to be shredded (81) is adjacent to or abuts against the end of the folded portion (811) of the first paper to be shredded (81), so that the second paper to be shredded (81) enters the horizontal paper feeding passage. The second sheet of paper to be shredded (81) in the path partially overlaps with the first sheet of paper to be shredded (81), the lower paper pickup roller (52) separates from the second sheet of paper to be shredded (81) again, the lower paper pickup roller (52) rubs the third sheet of paper to be shredded (81), the front end of the folded portion (811) of the third sheet of paper to be shredded (81) is adjacent to or abuts against the end of the folded portion (811) of the second sheet of paper to be shredded (81), thereby continuously overlapping the paper feed, and the horizontal paper feed channel is blocked at the paper feed side of the horizontal paper feed channel by the upper paper pickup roller (51) and the lower paper pickup roller (52); The upper pickup roller (51) and the lower pickup roller (52) are both located between the middle and lower end of the paper pile (8), the distance between the pickup point E and the lower end of the paper pile (8) is set to D, the length of the folding portion (811) is set to L, the radius of the lower pickup roller (52) is set to R, D=L+R+compensation coefficient H, the compensation coefficient H is 0.3-0.8 cm, L is 2-10 cm, and the maximum number of overlapping sheets is 3 to 15 sheets.

10. A paper feeding method for a paper shredder according to claim 8, characterized in that: In the paper pressing step, when the paper feed sensor detects that there is no paper pile (8) in the automatic side paper feed channel (32), the paper pressing drive mechanism drives the paper pressing mechanism (6) to move toward a side away from the paper winding mechanism, so that the paper pressing mechanism (6) moves out of the automatic side paper feed channel (32), and then repeats the paper placing step; In the paper shredding step, the paper shredding cutter (21) shreds the paper to be shredded (81) in the vertical paper feeding channel (31) and the paper to be shredded (81) in the automatic side paper feeding channel (32) at the same time; In the paper guiding step, the folded and mutually overlapping paper (81) to be shredded abuts against the paper guiding mechanism (7) in the transverse paper feeding channel after passing through the paper rolling mechanism, and the paper (81) to be shredded moves along the guiding direction of the paper guiding mechanism (7) toward the shredding inlet (211) of the paper shredding knife (21).

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