Paper shredder with improved automatic paper feeding device

Abstract

The utility model 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. 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 utility model relates to a paper shredder technical field especially is related to a paper shredder of improved automatic paper feeding device. BACKGROUND

[0002] The paper shredder is provided with an automatic paper feeding device for feeding paper automatically, and the automatic paper feeding device on the existing paper shredder includes two types, the first type is to set the paper obliquely above the oblique upper side of the paper shredding cutter, and to feed the paper into the paper shredding cutter by the rubber roller, and the second type is to set the paper horizontally above the paper shredding cutter, and to set two rubber rollers rotating oppositely between the paper and the paper shredding cutter, and to fold the paper from the middle part of the paper and roll into the paper shredding cutter; the first type of automatic paper feeding device needs to feed the paper one by one, and the single rubber roller and the paper are prone to paper jamming, which not only slows down the feeding speed, but also is prone to paper jamming, and the second type of automatic paper feeding device folds the paper to speed up the feeding speed, but the paper is horizontally placed above the paper shredding cutter, which results in only one feeding channel of the paper shredder, and when a large amount of paper is shredded, the single paper shredding cannot be synchronized, and when the paper needs to be inserted and shredded, the stacked paper to be shredded needs to be taken out, which is inconvenient to use, and therefore, it is necessary to improve. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model aims at providing a paper shredder with an improved automatic paper feeding device, which improves the paper feeding efficiency, reduces paper jamming, improves safety, synchronously shreds single paper while continuously shredding paper, improves the use convenience, and is convenient to clean.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a paper shredder with an improved automatic paper feeding device, which includes a paper shredder head, a paper shredder core and a control circuit, the paper shredder core and the control circuit are arranged in the paper shredder head respectively, the paper shredder core is provided with a paper shredding cutter and a paper shredding driving mechanism, the paper shredding driving mechanism is connected with the paper shredding cutter in transmission, the control circuit is electrically connected with the paper shredding driving mechanism, the upper part of the paper shredder head is provided with a manual paper feeding inlet and an automatic paper feeding bin, the manual paper feeding inlet and the automatic paper feeding bin are arranged at intervals, the upper part of the paper shredding cutter is provided with a crushing inlet, the crushing inlet is below the manual paper feeding inlet, the manual paper feeding inlet is connected with the crushing inlet in vertical communication through a vertical paper feeding channel, the automatic paper feeding bin is provided with an automatic side paper feeding channel, the automatic side paper feeding channel is arranged obliquely beside the paper shredding cutter, the lower end of the automatic side paper feeding channel is lower than the top of the crushing inlet, a horizontal paper feeding channel is arranged between the automatic side paper feeding channel and the crushing inlet, the side of the horizontal paper feeding channel adjacent to the automatic side paper feeding channel is provided with a paper rolling mechanism,

[0005] The paper winding mechanism is provided with an upper paper winding roller and a lower paper winding roller, the upper paper winding roller and the lower paper winding roller are arranged from top to bottom along the inclined direction of the automatic side paper feeding channel, the upper paper winding roller and the lower paper winding roller have a paper winding gap therebetween, the rotation directions of the upper paper winding roller and the lower paper winding roller are opposite, the lower paper winding roller has a paper winding point E for winding paper, the paper winding point E is higher than the lower end of the automatic side paper feeding channel along the parallel direction of the automatic side paper feeding channel, and the middle or lower part of the to-be-shredded paper is folded and wound into the paper winding gap when the paper winding mechanism winds paper.

[0006] In a further technical solution, the automatic side paper feeding channel is provided with a paper pressing mechanism, the paper pressing mechanism is arranged on the opposite side of the paper winding mechanism,

[0007] The paper pressing mechanism comprises a paper pressing driving assembly, a paper pressing plate and a paper pressing elastic piece, the paper pressing driving assembly is electrically connected with the control circuit respectively, the paper pressing plate is arranged on one side of the automatic side paper feeding channel along the inclined direction of the automatic side paper feeding channel, the paper pressing plate is slidingly 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 driving assembly is in transmission connection with the paper pressing plate, the paper pressing plate moves towards and away from the paper winding mechanism, and the paper pressing elastic piece is arranged between the paper pressing plate and the shredder core to realize the reset of the paper pressing plate towards the paper winding mechanism.

[0008] In a further technical solution, the paper pressing mechanism is further provided with a paper feeding detection assembly, the paper feeding detection assembly is arranged at the lower part of the automatic side paper feeding channel and is electrically connected with the control circuit, and the paper feeding detection assembly adopts a light control sensor.

[0009] In a further technical solution, the paper pressing driving assembly comprises a paper pressing driving motor, a paper pressing rotating shaft, a paper pressing driving cam, a paper pressing trigger cam and a paper pressing trigger switch, the paper pressing driving motor is fixedly installed on the shredder core, the paper pressing rotating shaft is rotatably installed on the shredder core, the paper pressing driving motor is in transmission connection with the paper pressing rotating shaft, the paper pressing driving cam and the paper pressing trigger cam are fixedly installed on the paper pressing rotating shaft respectively, the paper pressing trigger switch is electrically connected with the control circuit and is in trigger cooperation with the paper pressing trigger cam, one side of the paper pressing plate away from the automatic side paper feeding channel is provided with a driving connecting seat and a plurality of sliding columns, each sliding column is slidingly installed on the shredder core, each sliding column is sleeved with a paper pressing elastic piece, the driving connecting seat is provided with a sliding groove, the sliding groove is in sliding cooperation with the paper pressing rotating shaft, and the paper pressing trigger cam is in abutting cooperation with the driving connecting seat.

[0010] When the paper feeding detection assembly does not sense the to-be-shredded paper, the flange of the paper pressing driving cam abuts against the driving connecting seat, the paper pressing trigger cam abuts against the paper pressing trigger switch, and the paper pressing plate exits the automatic side paper feeding channel;

[0011] When the paper feeding detection assembly senses the to-be-shredded paper, the paper pressing driving cam is separated from the driving connecting seat, the paper pressing trigger cam is separated from the paper pressing trigger switch, the paper pressing plate extends into the automatic side paper feeding channel and abuts against the to-be-shredded paper.

[0012] Further, the side of the paper pressing plate facing the paper winding mechanism is rotatably provided with at least two paper feeding shafts, and the two paper feeding shafts are respectively arranged on the sides of the upper and lower paper rolling rollers.

[0013] Further, the paper shredding driving mechanism comprises a paper shredding driving motor and a paper shredding driving gear set, the paper shredding driving motor is fixedly arranged on the paper shredder core, the paper shredding driving motor is in transmission connection with the paper shredding driving gear set, the same end of the upper and lower paper rolling rollers is respectively provided with an upper paper rolling transmission gear and a lower paper rolling transmission gear, the upper paper rolling transmission gear and the lower paper rolling transmission gear are in meshing with each other, and the paper shredding driving gear set is in meshing with the lower paper rolling transmission gear.

[0014] The upper part of the paper shredding cutter is provided with an arc-shaped lower guide plate, one side of the lower guide plate extends to the middle part of the shredding inlet, a paper guiding mechanism is arranged between the paper winding mechanism and the shredding inlet, and a horizontal paper feeding channel is formed between the paper guiding mechanism and the lower guide plate.

[0015] Further, the paper guiding mechanism comprises at least one paper guiding rubber roller, the paper guiding rubber roller is rotatably arranged on the paper shredder core, the paper guiding rubber roller is arranged on the side of the upper paper rolling roller facing the paper shredding cutter, the lower part of the paper guiding rubber roller faces the side of the paper shredding cutter, one end of the paper guiding rubber roller is provided with a paper guiding transmission gear, and the paper guiding transmission gear is in meshing with the lower paper rolling transmission gear.

[0016] Further, the paper guiding mechanism comprises a paper guiding shell, the paper guiding shell is fixedly arranged on the paper shredder core, and the paper guiding shell is provided with at least one paper guiding arc surface, one end of the paper guiding arc surface extends above the paper winding gap, and the other end of the paper guiding arc surface extends above the shredding inlet.

[0017] Further, the upper part of the paper shredder head is provided with a paper feeding mounting groove, the paper feeding mounting groove is provided with a paper feeding bottom plate and a paper feeding flap, the paper feeding bottom plate is movably arranged above the paper shredder core, the rear part of the paper feeding bottom plate is provided with a locking assembly, the locking assembly is in locking cooperation with the paper shredder head, a vertical paper feeding channel is arranged on the front part of the paper feeding bottom plate, the lower part of the paper feeding flap is hingedly arranged on the rear side of the paper feeding mounting groove, the front side of the paper feeding flap is provided with an upper and lower opening paper placing box, the lower part of the paper placing box is aligned and communicated with the automatic side paper feeding channel when the automatic paper feeding is performed, and the paper feeding flap covers the rear part of the paper feeding mounting groove and seals the automatic side paper feeding channel when the automatic paper feeding function is not used.

[0018] Further, the distance between the paper rolling point E and the lower end of the automatic side paper feeding channel is D, the folded paper forms a folded part on one side of the paper to be shredded after being folded, the length of the folded part is L, the radius of the lower paper rolling roller is R, D = L + R + a compensation coefficient H, the compensation coefficient H is 0.3-0.8 cm, and L is 2-10 cm.

[0019] The advantages of this invention compared to existing technologies using the above structure are as follows: The paper to be shredded in the automatic side feed channel is wound into the paper roll gap between the upper and lower paper feed rollers from the side, and folded simultaneously during winding, thereby shortening the paper feed stroke and accelerating the feeding speed. The paper is then guided to the shredding inlet of the shredder by the paper guiding mechanism, ensuring the automatic side feed channel is located beside the shredder and the shredding inlet is not exposed within the automatic side feed channel, thus improving safety. The paper roll mechanism is located at the lower part of the paper to be shredded. During feeding, the paper is folded from the middle to the lower end and wound into the paper roll gap. After the folded portion of the paper separates from the lower paper feed roller, the next sheet of paper to be shredded is rolled by the lower paper feed roller. The paper rollers are wound into the gap between the paper rolls, thus creating an overlap between two adjacent sheets of paper to be shredded during feeding, further improving feeding efficiency. The paper feeding detection component detects whether there is paper to be shredded in the automatic side feeding channel, thereby controlling the paper pressing drive component to drive the pressing plate to move, so that the paper to be shredded is pressed against the paper roll mechanism during feeding and avoids the paper to be shredded during unloading, eliminating the need for manual operation and improving operational convenience. In case of paper jam, it is easy to remove the pressing plate out of the automatic side feeding channel for cleaning. When performing continuous shredding, single or small amounts of paper to be shredded are directly inserted into the shredding inlet through the vertical feeding channel, allowing paper to be fed simultaneously through the automatic side feeding channel and the vertical feeding channel, realizing the queue-jumping shredding function, further improving the convenience of use. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the shredder head of this utility model;

[0023] Figure 3 This is a schematic diagram of the paper pressing mechanism of the automatic side paper feeding channel of this utility model when there is paper.

[0024] Figure 4 This is a schematic diagram of the paper pressing mechanism of the automatic side paper feeding channel of this utility model when there is no paper.

[0025] Figure 5 This is a schematic diagram of the continuous feeding state of the paper to be shredded after being folded according to this utility model.

[0026] Figure 6 This is a cross-sectional view of the paper guiding mechanism of this utility model using a paper guiding roller during continuous paper feeding;

[0027] Figure 7 This is the utility model Figure 6 Enlarged view of part A;

[0028] Figure 8 is the cross section view of the paper guiding mechanism in the continuous paper feeding of the paper guiding shell of the utility model;

[0029] Figure 9 is the paper guiding mechanism of the utility model Figure 8 the B part enlarged view.

[0030] In the figure,

[0031] 1 paper shredder head, 11 paper feeding installation slot, 12 paper feeding bottom plate, 13 locking assembly, 14 paper feeding flap, 15 paper discharging box;

[0032] 2 paper shredder core, 21 paper shredding cutter, 211 pulverizing entrance, 22 lower guide plate;

[0033] 31 vertical paper feeding channel, 311 manual paper feeding entrance, 32 automatic side paper feeding channel;

[0034] 41 paper shredding drive gear set;

[0035] 51 upper paper rubbing roller, 511 upper paper rubbing transmission gear, 52 lower paper rubbing roller, 521 lower paper rubbing transmission gear;

[0036] 6 paper pressing mechanism, 61 paper feeding detection assembly, 62 paper pressing drive motor, 63 paper feeding rotating shaft, 64 paper pressing drive cam, 65 paper pressing trigger cam, 66 paper pressing trigger switch, 67 paper pressing plate, 671 paper pressing rotating shaft, 672 drive connecting seat, 673 sliding groove, 674 sliding column, 68 paper pressing elastic member;

[0037] 7 paper guiding mechanism, 71 paper guiding rubber roller, 711 paper guiding transmission gear, 72 paper guiding shell, 721 paper guiding camber surface;

[0038] 8 paper stack, 81 paper to be shredded, 811 folding part. DETAILED DESCRIPTION

[0039] The following is only the preferred embodiment of the utility model, and does not limit the protection scope of the utility model.

[0040] A paper shredder with improved automatic paper feeding device, such as Figures 1 to 9As shown, the shredder head 1, the shredder core 2 and the control circuit are included, the shredder core 2 and the control circuit are respectively arranged in the shredder head 1, the shredder core 2 is provided with a shredding cutter 21 and a shredding driving mechanism, the shredding driving mechanism is drivingly connected with the shredding cutter 21, the control circuit is electrically connected with the shredding driving mechanism, the upper part of the shredder head 1 is provided with a manual paper feeding inlet 311 and an automatic paper feeding bin, the manual paper feeding inlet 311 and the automatic paper feeding bin are arranged in interval, the upper part of the shredding cutter 21 is provided with a crushing inlet 211, the crushing inlet 211 is located below the manual paper feeding inlet 311, the manual paper feeding inlet 311 is vertically communicated with the crushing inlet 211 through a vertical paper feeding channel 31, the automatic paper feeding bin is provided with an automatic side paper feeding channel 32, the automatic side paper feeding channel 32 is obliquely arranged at the side of the shredding cutter 21, the lower end of the automatic side paper feeding channel 32 is lower than the top of the crushing inlet 211, a horizontal paper feeding channel is arranged between the automatic side paper feeding channel 32 and the crushing inlet 211, the horizontal paper feeding channel is provided with a paper winding mechanism adjacent to one side of the automatic side paper feeding channel 32, the paper winding mechanism is provided with an upper paper winding roller 51 and a lower paper winding roller 52, the upper paper winding roller 51 and the lower paper winding roller 52 are arranged from top to bottom along the oblique direction of the automatic side paper feeding channel 32, the upper paper winding roller 51 and the lower paper winding roller 52 have a paper winding gap therebetween, the rotation directions of the upper paper winding roller 51 and the lower paper winding roller 52 are opposite, the lower paper winding roller 52 has a paper winding point E for winding paper, the paper winding point E is higher than the lower end of the automatic side paper feeding channel 32 in the parallel direction of the automatic side paper feeding channel 32, the middle or lower part of the paper to be shredded 81 is folded and wound into the paper winding gap when the paper winding mechanism winds paper, the automatic side paper feeding channel 32 is provided with a paper pressing mechanism 6, the paper pressing mechanism 6 is arranged at the opposite side of the paper winding mechanism.

[0041] The paper of the traditional continuous paper feeding shredder can only be fed one by one when the paper is placed obliquely, and the feeding stroke of the paper to be shredded 81 is the same as the total length of the paper to be shredded 81, and the shredder with the paper placed horizontally can fold and roll the paper to be shredded 81 from the middle part of the paper to be shredded 81 into the crushing entrance 211, but the paper to be shredded 81 completely blocks the crushing entrance 211, and the function of inserting the paper to be shredded cannot be realized, and the paper to be shredded 81 of the automatic side paper feeding channel 32 of the utility model is rolled into the paper rolling gap between the upper paper rolling roller 51 and the lower paper rolling roller 52 from the side, and is folded at the same time, so that the feeding stroke of the paper to be shredded 81 is shortened, and the feeding speed is accelerated, and then the paper to be shredded 81 is guided to the crushing entrance 211 of the paper shredding cutter 21 through the horizontal paper feeding channel, the automatic side paper feeding channel 32 is located beside the paper shredding cutter 21, the paper rolling mechanism separates the feeding side of the horizontal paper feeding channel, and the paper shredding cutter 21 is prevented from being exposed in the automatic side paper feeding channel 32, so that the safety is improved; the paper rolling mechanism is located at the lower part of the paper to be shredded 81, and the paper to be shredded 81 is folded and rolled into the paper rolling gap from the middle part to the lower end part during feeding, when the folding part 811 of the paper to be shredded 81 is separated from the lower paper rolling roller 52, the next paper to be shredded 81 is rolled into the paper rolling gap by the lower paper rolling roller 52, so that the two adjacent papers to be shredded 81 are overlapped during feeding, and the feeding efficiency is further improved; during continuous paper shredding, the single or small amount of paper to be shredded 81 is directly inserted into the crushing entrance 211 through the vertical paper feeding channel 31, the automatic side paper feeding channel 32 and the vertical paper feeding channel 31 feed at the same time, the function of inserting the paper to be shredded is realized, and the use convenience is further improved.

[0042] Specifically, the paper pressing mechanism 6 comprises a paper feeding detection assembly 61, a paper pressing driving assembly, a paper pressing plate 67 and a paper pressing elastic element 68, the paper feeding detection assembly 61 is arranged on one side of the automatic side paper feeding channel 32, the paper feeding detection assembly 61 and the paper pressing driving assembly are respectively electrically connected with the control circuit, the paper pressing plate 67 is arranged on one side of the automatic side paper feeding channel 32 along the inclined direction of the automatic side paper feeding channel 32, the paper pressing plate 67 is slidingly installed on the shredder core 2 and extends into the automatic side paper feeding channel 32 from the outside of the automatic side paper feeding channel 32, the paper pressing driving assembly is in transmission connection with the paper pressing plate 67, the paper pressing plate 67 moves towards and away from the paper rolling mechanism, the paper pressing elastic element 68 is arranged between the paper pressing plate 67 and the shredder core 2, so as to realize the reset of the paper pressing plate 67 towards the paper rolling mechanism, the paper feeding detection assembly 61 detects whether there is paper to be shredded 81 in the automatic side paper feeding channel 32, so as to control the paper pressing driving assembly to drive the paper pressing plate 67 to move, so as to press the paper to be shredded 81 on the paper rolling mechanism during feeding, and avoid the paper to be shredded 81 during paper discharging, without manual operation, the operation convenience is improved, and the paper pressing plate 67 is moved out of the automatic side paper feeding channel 32 for cleaning when paper jam occurs;

[0043] The distance between the paper rubbing point E and the lower end of the automatic side paper feeding channel 32 is set as D, the folded part 811 is formed on one side of the to-be-shredded paper 81 after the to-be-shredded paper 81 is folded, the length of the folded part 811 is set as L, the radius of the lower paper rubbing roller 52 is set as R, D = L + R + a compensation coefficient H, the compensation coefficient H is 0.3-0.8 cm, and L is 2-10 cm. Since the folding is performed on the middle and lower parts of the to-be-shredded paper 81, after entering the horizontal paper feeding channel, each to-be-shredded paper 81 is partially overlapped with an adjacent to-be-shredded paper 81, and the maximum number of overlapped to-be-shredded papers 81 in the horizontal paper feeding channel is 3 or more. The distance between the paper rubbing point E and the lower end of the automatic side paper feeding channel 32 is controlled to adjust the maximum number of overlapped to-be-shredded papers 81. Preferably, the maximum number of overlapped to-be-shredded papers 81 is 3-15. When the maximum number of overlapped to-be-shredded papers 81 is 3, L = 2 cm; when the maximum number of overlapped to-be-shredded papers 81 is 5, L = 3.34 cm; when the maximum number of overlapped to-be-shredded papers 81 is 10, L = 6.67 cm; and when the maximum number of overlapped to-be-shredded papers 81 is 15, L = 10 cm.

[0044] Specifically, the paper feeding detection assembly 61 includes a light control sensor arranged at the lower part of the automatic side paper feeding channel 32 and electrically connected with the control circuit. The paper pressing driving assembly includes a paper pressing driving motor 62, a paper pressing rotating shaft 671, a paper pressing driving cam 64, a paper pressing trigger cam 65, and a paper pressing trigger switch 66. The paper pressing driving motor 62 is fixedly installed on the shredder core 2, the paper pressing rotating shaft 671 is rotatably installed on the shredder core 2, the paper pressing driving motor 62 is in transmission connection with the paper pressing rotating shaft 671, the paper pressing driving cam 64 and the paper pressing trigger cam 65 are fixedly installed on the paper pressing rotating shaft 671, the paper pressing trigger switch 66 is electrically connected with the control circuit and is in trigger cooperation with the paper pressing trigger cam 65, and the paper pressing plate 67 is provided with a driving connecting seat 672 and a plurality of slide columns 674 on the side away from the automatic side paper feeding channel 32. Each slide column 674 is slidably installed on the shredder core 2, each slide column 674 is sleeved with a paper pressing elastic member 68, the driving connecting seat 672 is provided with a sliding groove 673 in sliding cooperation with the paper pressing rotating shaft 671, and the paper pressing trigger cam 65 is in abutting cooperation with the driving connecting seat 672. When the light control sensor does not sense the to-be-shredded paper 81, the paper pressing driving motor 62 is operated to drive the paper pressing rotating shaft 671 to rotate until the flange of the paper pressing driving cam 64 abuts against the driving connecting seat 672, the driving connecting seat 672 is away from the paper winding mechanism, so that the paper pressing plate 67 moves out of the automatic side paper feeding channel 32. At this time, the paper pressing trigger cam 65 abuts against the paper pressing trigger switch 66, so that the paper pressing driving motor 62 is stopped, and the flange of the paper pressing driving cam 64 is kept abutting against the driving connecting seat 672.

[0045] When the light sensor senses the paper to be shredded 81, the paper pressing driving motor 62 is started again for a preset time and then stopped, driving the paper pressing shaft 671 to rotate until the paper pressing driving cam 64 is separated from the driving connecting seat 672, thereby releasing the driving connecting seat 672, and the paper pressing plate 67 moves towards 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 abutting the paper stack 8 against the paper winding mechanism, so as to automatically drive the paper pressing plate 67 without manual operation, which is simple in structure, low in cost and high in convenience.

[0046] The side of the paper pressing plate 67 towards the paper winding mechanism is rotatably provided with at least two paper feeding shafts 63, which are arranged on the sides of the upper and lower paper rollers 51 and 52, respectively. The paper feeding 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 and reducing the paper feeding resistance, further preventing paper jamming.

[0047] Specifically, the paper shredding driving mechanism includes a paper shredding driving motor and a paper shredding driving gear set 41, the paper shredding driving motor is fixedly installed on the paper shredder core 2, the paper shredding driving motor is in transmission connection with the paper shredding driving gear set 41, the same end of the upper and lower paper rollers 51 and 52 is respectively provided with an upper paper roller transmission gear 511 and a lower paper roller transmission gear 521, the upper paper roller transmission gear 511 and the lower paper roller transmission gear 521 are in meshing with each other, and the paper shredding driving gear set 41 is in meshing with the lower paper roller transmission gear 521; the upper part of the paper cutter 21 is provided with an arc-shaped lower guide plate 22, one side of the lower guide plate 22 extends to the middle part of the shredding inlet 211, the paper winding mechanism and the shredding inlet 211 are provided with a paper guide mechanism 7, and the paper guide mechanism 7 and the lower guide plate 22 form a horizontal paper feeding channel. The upper and lower paper rollers 51 and 52 are driven by the paper shredding driving mechanism without the need for independent driving mechanisms, which is simple in structure and low in cost; the paper to be shredded 81 is guided by the paper guide mechanism and then guided again by the lower guide plate 22, thereby improving the success rate of the paper to be shredded 81 entering the shredding inlet 211 and avoiding paper jamming, and improving reliability and stability. The upper and lower paper rollers 51 and 52 block the paper feeding side of the horizontal paper feeding channel, thereby blocking the automatic side paper feeding channel 32 and the shredding inlet 211, thereby avoiding foreign matter or fingers from being inserted into the shredding inlet 211, and improving safety.

[0048] Specifically, the paper guiding mechanism 7 comprises at least one paper guiding rubber roller 71, which is rotatably installed on the shredder core 2, is arranged on the side of the upper paper rolling roller 51 facing the paper shredding cutter 21, and has a lower part rotating towards the side of the paper shredding cutter 21. One end of the paper guiding rubber roller 71 is provided with a paper guiding transmission gear 711, which is engaged with the lower paper rolling transmission gear 521. The paper guiding rubber roller 71 dynamically guides the paper to be shredded 81, the rotating direction of the paper guiding rubber roller 71 is the same as that of the upper paper rolling roller 51, the paper guiding rubber roller 71 is driven by the lower paper rolling roller 52, and no additional driving mechanism is needed, and the active rotation can improve the guiding success rate and guiding efficiency.

[0049] Specifically, the paper guiding mechanism 7 comprises a paper guiding shell 72, which is fixedly installed on the shredder core 2 and is provided with at least one paper guiding arc surface 721, one end of the paper guiding arc surface 721 extending above the paper winding gap and the other end extending above the shredding inlet 211. The paper guiding shell 72 statically guides the paper to be shredded 81, and the paper to be shredded 81 moves along the paper guiding arc surface 721 to the shredding inlet 211, so that the structure is simple and the cost is low.

[0050] Specifically, the upper part of the shredder head 1 is provided with a paper feeding installation slot 11, the paper feeding installation slot 11 is provided with a paper feeding bottom plate 12 and a paper feeding flap 14, the paper feeding bottom plate 12 is movably installed above the shredder core 2, the rear part of the paper feeding bottom plate 12 is provided with a locking assembly 13, the locking assembly 13 is locked with the shredder head 1, a vertical paper feeding channel 31 is arranged on the front part of the paper feeding bottom plate 12, the lower part of the paper feeding flap 14 is hinged to the rear side of the paper feeding installation slot 11, the front side of the paper feeding flap 14 is provided with a paper placing box 15 which is open upward and downward, the lower part of the paper placing box 15 is aligned with and communicated with the automatic side paper feeding channel 32 when automatic paper feeding is performed, and the paper feeding flap 14 is arranged on the rear part of the paper feeding installation slot 11 and seals the automatic side paper feeding channel 32 when the automatic paper feeding function is not used. The paper feeding bottom plate 12 is detachably installed on the shredder head 1 through the locking assembly 13, the paper feeding bottom plate 12 can shield the shredder core 2 and protect the internal structure of the shredder core 2, and is convenient to disassemble, the vertical paper feeding channel 31 is arranged on the paper feeding bottom plate 12, the paper feeding bottom plate 12 is disassembled to expose the shredding inlet 211 on the paper feeding installation slot 11 when paper jam occurs, so as to facilitate the cleaning of paper jam. When continuous shredding is performed, the paper feeding flap 14 is turned open, the inclination angle of the paper feeding flap 14 is similar to that of the automatic side paper feeding channel 32, the paper stack 8 is inserted into the automatic side paper feeding channel 32 from the paper placing box 15, so as to shorten the length of the automatic side paper feeding channel 32, and the paper feeding flap 14 is closed and the automatic side paper feeding channel 32 is sealed when the continuous shredding function is not used, which not only reduces the height of the whole machine, but also protects the shredder core 2.

[0051] The working principle of the utility model is:

[0052] A plurality of paper sheets 81 to be shredded are stacked in the automatic side paper feeding channel 32 which is obliquely arranged beside the shredding cutter 21 before shredding, and the paper sheets 81 to be shredded form a paper stack 8 in the automatic side paper feeding channel 32, with the lower end of the paper stack 8 located below the shredding inlet 211 of the shredding cutter 21;

[0053] After the paper feeding sensor detects that the paper stack 8 has entered, the paper pressing driving mechanism drives the paper pressing mechanism 6 to move towards the paper stack 8 and press the paper stack 8 tightly against the paper winding mechanism; when the paper feeding sensor detects that there is no paper stack 8 in the automatic side paper feeding channel 32, the paper pressing driving mechanism drives the paper pressing mechanism 6 to move towards the side away from the paper winding mechanism, so that the paper pressing mechanism 6 moves out of the automatic side paper feeding channel 32, and the paper feeding step is repeated;

[0054] The upper paper winding roller 51 of the paper winding mechanism rotates in the forward direction, and the lower paper winding roller 52 of the paper winding mechanism rotates in the reverse direction. The lower part of the upper paper winding roller 51 and the upper part of the lower paper winding roller 52 both rotate from one side of the paper stack 8 towards the side of the shredding cutter 21. The paper winding mechanism winds the first paper sheet 81 adjacent to the paper winding mechanism from the side of the paper sheet 81 to be shredded into the space between the upper paper winding roller 51 and the lower paper winding roller 52 and moves it towards the paper guiding mechanism 7. The upper paper winding roller 51 and the lower paper winding roller 52 are both located between the middle part and the lower end of the paper stack 8. The paper sheet 81 to be shredded is wound into the space between the upper paper winding roller 51 and the lower paper winding roller 52 from the middle part to the lower end of the paper stack 8, and the lower part of the paper sheet 81 to be shredded is folded to form a folded part 811;

[0055] After the first paper sheet 81 to be shredded is folded and wound by the paper winding mechanism, the first paper sheet 81 to be shredded is first separated from the lower paper winding roller 52, the upper paper winding roller 51 remains in contact with the first paper sheet 81 to be shredded, the lower paper winding roller 52 rubs the second paper sheet 81 to be shredded, the front end of the folded part 811 of the second paper sheet 81 to be shredded is adjacent to or abuts against the end of the folded part 811 of the first paper sheet 81 to be shredded, so that the second paper sheet 81 to be shredded entering the horizontal paper feeding channel partially overlaps the first paper sheet 81 to be shredded, the lower paper winding roller 52 is separated from the second paper sheet 81 to be shredded again, the lower paper winding roller 52 rubs the third paper sheet 81 to be shredded, the front end of the folded part 811 of the third paper sheet 81 to be shredded is adjacent to or abuts against the end of the folded part 811 of the second paper sheet 81 to be shredded, and so on for continuous overlapping paper feeding;

[0056] The folded paper sheet 81 to be shredded abuts against the paper guiding mechanism 7 after passing through the paper winding mechanism, and the paper sheet 81 to be shredded moves along the guiding direction of the paper guiding mechanism 7 towards the shredding inlet 211 of the shredding cutter 21; the paper guiding mechanism 7 adopts a paper guiding rubber roller 71 or a paper guiding arc surface 721, such as Figure 6 and Figure 7As shown, when the paper guiding mechanism 7 adopts the paper guiding rubber roller 71, the paper to be shredded 81 moves against the paper guiding rubber roller 71 after moving out of the paper winding mechanism, the rotating direction of the paper guiding rubber roller 71 is the same as that of the upper paper winding roller 51, the paper guiding rubber roller 71 changes the moving direction of the paper to be shredded 81, and the paper to be shredded 81 moves towards the shredding entrance 211; as shown, Figure 8 and Figure 9 As shown, when the paper guiding mechanism 7 adopts the paper guiding arc surface 721, one end of the paper guiding arc surface 721 extends to the side of the paper winding mechanism, and the other end extends above the shredding entrance 211, the paper to be shredded 81 moves along the paper guiding arc surface 721 towards the shredding entrance 211 after moving out of the paper winding mechanism.

[0057] Finally, the paper to be shredded 81 entering from the shredding entrance 211 is shredded into paper scraps by driving the shredding cutter 21 to rotate through the shredding driving mechanism.

[0058] When the paper to be shredded 81 needs to be inserted and shredded preferentially, the single or small amount of paper to be shredded 81 is inserted into the vertical paper feeding channel 31 from the shredding entrance 211, the vertical paper feeding channel 31 guides the paper to be shredded 81 to the shredding entrance 211, and 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 enter the shredding entrance 211 at the same time, so as to realize the function of inserting and shredding preferentially.

[0059] The above is only the preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as the limitation of the present application.

Claims

1. A paper 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 disposed within the shredder head (1), the shredder core (2) is provided with a shredder blade (21) and a shredder driving mechanism, the shredder driving mechanism being drively connected to the shredder blade (21), and the control circuit being electrically connected to the shredder driving mechanism, characterized in that: The upper part of the shredder head (1) is provided with a manual paper feeding inlet (311) and an automatic paper feeding bin, the manual paper feeding inlet (311) and the automatic paper feeding bin are arranged at intervals, the upper part of the shredding cutter (21) is provided with a crushing inlet (211), the crushing inlet (211) is located below the manual paper feeding inlet (311), the manual paper feeding inlet (311) is vertically communicated with the crushing inlet (211) through a vertical paper feeding channel (31), the automatic paper feeding bin is provided with an automatic side paper feeding channel (32), the automatic side paper feeding channel (32) is obliquely arranged beside the shredding cutter (21), the lower end of the automatic side paper feeding channel (32) is lower than the top of the crushing inlet (211), a horizontal paper feeding channel is arranged between the automatic side paper feeding channel (32) and the crushing inlet (211), the horizontal paper feeding channel is provided with a paper winding mechanism adjacent to one side of the automatic side paper feeding channel (32), The paper winding mechanism is provided with an upper paper winding roller (51) and a lower paper winding roller (52), the upper paper winding roller (51) and the lower paper winding roller (52) are arranged from top to bottom along the inclined direction of the automatic side paper feeding channel (32), the upper paper winding roller (51) and the lower paper winding roller (52) have a paper winding gap therebetween, the rotation directions of the upper paper winding roller (51) and the lower paper winding roller (52) are opposite, the lower paper winding roller (52) has a paper winding point E for winding paper, the paper winding point E is higher than the lower end of the automatic side paper feeding channel (32) in the parallel direction of the automatic side paper feeding channel (32), and the middle or lower part of the paper to be shredded (81) is folded and wound into the paper winding gap when the paper winding mechanism winds paper.

2. The paper shredder with improved automatic paper feed device according to claim 1, characterized in that: The automatic side paper feeding channel (32) is provided with a paper pressing mechanism (6) arranged on the opposite side of the paper winding mechanism, The paper pressing mechanism (6) comprises a paper pressing driving assembly, a paper pressing plate (67) and a paper pressing elastic element (68), the paper pressing driving assembly is electrically connected with the control circuit respectively, the paper pressing plate (67) is arranged on one side of the automatic side paper feeding channel (32) along the inclined direction of the automatic side paper feeding channel (32), the paper pressing plate (67) is slidingly installed on the shredder core (2) and extends into the automatic side paper feeding channel (32) from the outside of the automatic side paper feeding channel (32), the paper pressing driving assembly is in transmission connection with the paper pressing plate (67), the paper pressing plate (67) moves towards and away from the paper winding mechanism, and the paper pressing elastic element (68) is arranged between the paper pressing plate (67) and the shredder core (2) to realize the reset of the paper pressing plate (67) towards the paper winding mechanism.

3. The paper shredder of claim 2, wherein: The paper pressing mechanism (6) is also provided with a paper feeding detection assembly (61), the paper feeding detection assembly (61) is arranged at the lower part of the automatic side paper feeding channel (32) and is electrically connected with the control circuit, and the paper feeding detection assembly (61) adopts a light control sensor.

4. The paper shredder of claim 3, wherein: The paper pressing driving assembly comprises a paper pressing driving motor (62), a paper pressing rotating shaft (671), a paper pressing driving cam (64), a paper pressing triggering cam (65) and a paper pressing triggering switch (66), the paper pressing driving motor (62) is fixedly installed on the shredder core (2), the paper pressing rotating shaft (671) is rotatably installed on the shredder core (2), the paper pressing driving motor (62) is in transmission connection with the paper pressing rotating shaft (671), the paper pressing driving cam (64) and the paper pressing triggering cam (65) are respectively fixedly installed on the paper pressing rotating shaft (671), the paper pressing triggering switch (66) is in electrical connection with the control circuit and is in triggering cooperation with the paper pressing triggering cam (65), the paper pressing plate (67) is provided with a driving connecting seat (672) and a plurality of slide columns (674) on the side away from the automatic side paper feeding channel (32), each slide column (674) is slidably installed on the shredder core (2), each slide column (674) is sleeved with a paper pressing elastic member (68), the driving connecting seat (672) is provided with a sliding groove (673), the sliding groove (673) is in sliding cooperation with the paper pressing rotating shaft (671), the paper pressing triggering cam (65) is in abutting cooperation with the driving connecting seat (672); When the paper pressing detection assembly (61) 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 plate (67) exits the automatic side paper feeding channel (32); When the paper pressing detection assembly (61) senses the paper to be shredded (81), the paper pressing driving cam (64) is separated from the driving connecting seat (672), the paper pressing triggering cam (65) is separated from the paper pressing triggering switch (66), and the paper pressing plate (67) extends into the automatic side paper feeding channel (32) and abuts against the paper to be shredded (81).

5. The paper shredder of claim 4, wherein: At least two paper feeding rotating shafts (63) are rotatably installed on the side of the paper pressing plate (67) facing the paper winding mechanism, and the two paper feeding rotating shafts (63) are respectively arranged on the sides of the upper paper rolling roller (51) and the lower paper rolling roller (52).

6. The paper shredder of claim 1, wherein: The shredding driving mechanism comprises a shredding driving motor and a shredding driving gear set (41), the shredding driving motor is fixedly installed on the shredder core (2), the shredding driving motor is in transmission connection with the shredding driving gear set (41), the same end of the upper paper rolling roller (51) and the lower paper rolling roller (52) is respectively provided with an upper paper rolling transmission gear (511) and a lower paper rolling transmission gear (521), the upper paper rolling transmission gear (511) and the lower paper rolling transmission gear (521) are in meshing cooperation, and the shredding driving gear set (41) is in meshing cooperation with the lower paper rolling transmission gear (521). The upper part of the shredding cutter (21) is provided with an arc-shaped lower guide plate (22), one side of the lower guide plate (22) extends to the middle part of the crushing inlet (211), a paper guiding mechanism (7) is arranged between the paper winding mechanism and the crushing inlet (211), and the paper guiding mechanism (7) and the lower guide plate (22) form the horizontal paper feeding channel.

7. The paper shredder of claim 6, wherein: The paper guiding mechanism (7) comprises at least one paper guiding rubber roller (71) which is rotatably installed on the shredder core (2), is arranged on the side of the upper paper rolling roller (51) facing the shredding cutter (21), and has its lower part rotating towards the side of the shredding cutter (21), and one end of the paper guiding rubber roller (71) is provided with a paper guiding transmission gear (711) which is engaged with the lower paper rolling transmission gear (521).

8. The paper shredder of claim 6, wherein: The paper guiding mechanism (7) comprises a paper guiding housing (72) which is fixedly installed on the shredder core (2) and is provided with at least one paper guiding arc surface (721) extending above the paper rolling gap at one end and above the powdering inlet (211) at the other end.

9. The shredder with an improved automatic paper feeder according to any one of claims 1 to 8, characterized in that: The upper part of the shredder head (1) is provided with a paper feeding installation slot (11) in which a paper feeding bottom plate (12) and a paper feeding flap (14) are arranged, the paper feeding bottom plate (12) is movably installed above the shredder core (2), the rear part of the paper feeding bottom plate (12) is provided with a locking assembly (13) which is locked with the shredder head (1), the vertical paper feeding channel (31) is arranged on the front part of the paper feeding bottom plate (12), the lower part of the paper feeding flap (14) is hingedly connected to the rear side of the paper feeding installation slot (11), the front side of the paper feeding flap (14) is provided with an upper and lower opening paper placing box (15), the lower part of the paper placing box (15) is aligned with and communicated with the automatic side paper feeding channel (32) when automatic paper feeding is performed, and the paper feeding flap (14) is arranged on the rear part of the paper feeding installation slot (11) and seals the automatic side paper feeding channel (32) when the automatic paper feeding function is not used.

10. The paper shredder of claim 9, wherein: The distance between the paper rolling point E and the lower end of the automatic side paper feeding channel (32) is set as D, the folded paper (81) forms a folding part (811) on one side of the paper to be shredded (81) after being folded, the length of the folding part (811) is set as L, the radius of the lower paper rolling roller (52) is set as R, D = L + R + compensation coefficient H, the compensation coefficient H is 0.3-0.8 cm, and L is 2-10 cm.

Images