Automatic paper shredder paper pressing structure and automatic paper shredder

Abstract

The present invention discloses an automatic shredder paper pressing structure and an automatic shredder thereof, comprising an upper cover of the shredder, a lower cover of the shredder, a paper supporting box, a machine cover, a paper pressing base plate, a base plate rotating shaft, a large pressure plate torsion spring, a pressure plate rotating shaft, a large pressure plate and two rotating shaft torsion springs, a base plate rotating shaft fixing seat and a pressure plate rotating shaft fixing seat, wherein the upper cover of the shredder is fixedly connected with the lower cover; the paper supporting box is recessed on the lower cover and forms a containing cavity for placing paper; the machine cover is pivotally connected with one end of the upper cover for closing / opening the shredder; one end of the paper pressing base plate The base plate shaft is fixed; two shaft torsion springs are respectively sleeved on both ends of the base plate shaft and placed in two base plate shaft fixing seats for realizing the rotation of the base plate shaft; the two base plate shaft fixing seats are fixed to the inner side of the machine cover for fixing the paper pressing base plate to the inner side of the machine cover; two large pressure plate torsion springs are respectively sleeved on both ends of the pressure plate shaft and placed in two pressure plate shaft fixing seats for realizing the rotation of the pressure plate shaft; the large pressure plate is connected under the paper pressing base plate through the pressure plate shaft rotation for pressing the paper when the machine cover is closed.

Description

Technical Field

[0001] The invention relates to the field of paper shredders, and in particular to a paper pressing structure of an automatic paper shredder and the automatic paper shredder. Background Art

[0002] Existing automatic paper feeding shredders generally include a frame, a paper pressing mechanism installed on the frame, a paper feeding mechanism, a paper shredding mechanism and a driving mechanism. A paper feeding port is provided on the bottom plate of the paper placing area. The paper shredding mechanism is located below the paper placing area and opposite to the paper feeding port. The paper feeding mechanism is installed at the paper feeding port, and after the paper pressing mechanism presses the paper, the pressed paper is folded along the paper feeding port and transported to the paper shredding mechanism. The paper shredding mechanism shreds the paper, and the driving mechanism drives the paper feeding mechanism and the paper shredding mechanism to operate.

[0003] The paper pressing mechanism includes a cover plate, a pressure plate elastically mounted on the inner side of the cover plate, an elastic member mounted between the cover plate and the pressure plate, and a working room. The cover plate drives the pressure plate to press down. Under the action of the elastic member, the pressure plate presses the paper. However, when the paper pressing mechanism is opened, the pressure plate is often in a pop-up state relative to the cover plate, which is large in size and affects the appearance. On the other hand, the elastic member is arranged between the cover plate and the pressure plate. When pressing down the cover plate, the user often has to overcome the elastic force of the elastic member to press down the cover plate, which is laborious. Moreover, when the cover plate is closed to cover the paper placing area, if it is not closed tightly or is loose, the pressure plate cannot press the paper well, or the pressure plate may push open the cover plate during shredding, causing an unexpected stop of shredding.

[0004] The solution of the present invention is to improve the existing paper pressing mechanism in view of the above-mentioned problem. Summary of the invention

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a paper pressing structure for an automatic shredder and an automatic shredder thereof, which effectively solves the problems of unreasonable paper pressing structure, inconvenient operation, insufficient pressing force for pressing paper, etc. in the prior art.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted to solve the technical problem is as follows:

[0007] The present invention discloses a paper pressing structure for an automatic paper shredder, comprising an upper cover of the paper shredder, a lower cover of the paper shredder, a paper support box, a machine cover, a paper pressing base plate, a base plate rotating shaft, a large pressing plate torsion spring, a pressing plate rotating shaft, a large pressing plate, two rotating shaft torsion springs, a base plate rotating shaft fixing seat and a pressing plate rotating shaft fixing seat, wherein:

[0008] The upper cover of the shredder is fixedly connected with the lower cover of the shredder up and down;

[0009] The paper support box is recessed above the lower cover of the paper shredder to form a receiving cavity for placing stacked papers to be shredded;

[0010] The machine cover is pivotally connected to one end of the upper cover of the shredder and is used to cover or open the shredder;

[0011] One end of the paper pressing substrate is fixedly connected to the substrate rotating shaft;

[0012] The two rotating shaft torsion springs are respectively sleeved on the two ends of the substrate rotating shaft, and are respectively placed in the two substrate rotating shaft fixing seats located at the two ends of the substrate rotating shaft, so as to realize the rotation of the substrate rotating shaft and thus drive the rotation of the paper pressing substrate;

[0013] The two substrate rotating shaft fixing seats are fixedly connected to the inner side of the machine cover, and are used to fix the paper pressing substrate to the inner side of the machine cover;

[0014] The two large pressure plate torsion springs are respectively sleeved on the two ends of the pressure plate rotating shaft, and are respectively placed in the two pressure plate rotating shaft fixing seats located at the two ends of the pressure plate rotating shaft, so as to realize the rotation of the pressure plate rotating shaft and thus drive the rotation of the large pressure plate;

[0015] The large pressing plate is rotatably connected to the bottom of the paper pressing base plate through the pressing plate rotating shaft, and is used to press the stacked papers to be shredded placed above the paper supporting box when the user closes the machine cover.

[0016] Furthermore, the base plate rotation axis is arranged away from the pivotal connection between the machine cover and the upper cover of the shredder.

[0017] Furthermore, at least one group of pickup rollers is included, each group of pickup rollers includes an upper pickup roller and a lower pickup roller, wherein:

[0018] The upper pickup wheel is fixed between two upper pickup wheel shaft fixing seats at one end of the paper pressing base plate away from the base plate rotating shaft through the upper pickup wheel shaft;

[0019] The lower pickup wheel is fixed to both sides of the lower cover of the shredder or fixed between two lower pickup wheel shaft fixing seats at the lower end of the paper support box through the lower pickup wheel shaft;

[0020] The lower paper pickup wheel partially protrudes from the upper surface of the paper support box, and its position is set corresponding to the position of the upper paper pickup wheel. When the user closes the machine cover, the upper paper pickup wheel on the paper pressing base plate presses against the stacked paper to be shredded above the paper support box and cooperates with the lower paper pickup wheel to pick up the paper, so that the bottom one or more papers of the stacked paper to be shredded enter the paper inlet on the paper support box.

[0021] Furthermore, a paper pressing strip is provided at one end of the paper pressing substrate away from the substrate rotating shaft. The paper pressing strip is integrally formed with the paper pressing substrate and is used to press the stacked paper to be shredded against the upper surface of the paper supporting box when the number of stacked paper to be shredded above the paper supporting box is small.

[0022] Furthermore, the large pressing plate includes a large connecting plate and a large pressing paper plate, and the large pressing paper plate is in contact with the upper surface of the paper supporting box when the paper pressing base plate is naturally released, so as to press the stacked paper to be shredded onto the upper surface of the paper supporting box.

[0023] Furthermore, a first through hole is provided on the large paper pressing board, and the position of the first through hole is adapted to the position of a travel switch partially protruding above the paper supporting box, so that the travel switch is placed in the first through hole when the stacked papers to be shredded above the paper supporting box are about to be shredded or have been shredded, and timely feedback on the shredding status is provided.

[0024] Preferably, the angle between the large connecting plate and the large paper pressing plate is greater than or equal to 90 degrees.

[0025] Preferably, the large connecting plate and the large pressing paper are made in one piece.

[0026] Furthermore, the large pressure plate is split into several small pressure plates, each of which includes a small connecting plate and a small pressure paper plate. Each of the small pressure paper plates is in contact with the upper surface of the paper support box when the paper pressing base plate is naturally released, and is used to press the stacked paper to be shredded tightly against the upper surface of the paper support box.

[0027] Furthermore, when the pressure plate shaft is a whole shaft, a number of small connecting plates of the small pressure plates are fixedly connected to it, and are fixedly connected to the paper pressing base plate through large pressure plate torsion springs at both ends of the pressure plate shaft and a pressure plate shaft fixing seat; or,

[0028] When the pressure plate shaft is split into several small pressure plate shafts, the number of the small pressure plate shafts is the same as the number of the small pressure plates, and the small connecting plates of the several small pressure plates are respectively fixedly connected to the several small pressure plate shafts, and are fixedly connected to the paper pressing base plate through the small pressure plate torsion springs at both ends of the pressure plate shafts and the pressure plate shaft fixing seats.

[0029] Furthermore, a second through hole is provided on a central one of the plurality of small paper presses, and the position of the second through hole is matched with the position of a travel switch partially protruding above the paper support box, so that the travel switch is placed in the second through hole when the stacked papers to be shredded above the paper support box are about to be shredded or have been shredded, and timely feedback on the shredding status is provided.

[0030] Preferably, the angles between each of the small connecting plates and the small pressing paper board are the same, and are greater than or equal to 90 degrees.

[0031] Preferably, each of the small connecting plates and the small pressing paper board are made in one piece.

[0032] The invention also discloses an automatic paper shredder, comprising the above-mentioned paper pressing structure.

[0033] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0034] 1. The present invention provides a paper pressing structure for an automatic paper shredder. When the user opens the machine cover, the paper pressing base is in a naturally released state due to gravity. After placing the stacked paper to be shredded on top of the paper tray and closing the machine cover, the large pressing plate (or several small pressing plates) on the paper pressing base presses against the upper surface of the stacked paper to be shredded, and the paper pressing base is squeezed back into place. As the stacked paper to be shredded gradually decreases, the paper pressing base descends, and the upper paper picking wheel gradually presses against the upper surface of the stacked paper to be shredded. At the same time, the paper pressing strip presses against the upper surface of the stacked paper to be shredded, which can also effectively increase the paper pressing effect and paper picking efficiency.

[0035] 2. Compared with the existing paper pressing structure, the two technical solutions of the present invention have the problem that the compression spring occupies a large space and the overall thickness of the paper pressing board is relatively large, and the structure is effectively simplified, the overall thickness of the paper pressing board is reduced, and the movable stroke of the paper pressing board is reduced. Both technical solutions of the present invention have the characteristics of ingenious design, reasonable structure, convenient operation, large pressing force for pressing paper, high paper rubbing efficiency, etc., and are suitable for wide market promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0037] Figure 1 It is a structural cross-sectional view of a large pressing plate (or a small pressing plate) in a paper pressing structure of an automatic paper shredder of the present invention after being pressed into place;

[0038] Figure 2 It is a structural cross-sectional view of a large pressing plate (or small pressing plate) in a paper pressing structure of an automatic paper shredder according to the present invention after returning to its original position;

[0039] Figure 3 It is a structural cross-sectional view of a large pressing plate (or a small pressing plate) in a paper pressing structure of an automatic paper shredder of the present invention when the paper shredder is nearly finished after being pressed down;

[0040] Figure 4 It is a structural cross-sectional view of an automatic paper shredder paper pressing structure of the present invention after a large pressing plate (or a small pressing plate) returns to its original position after a paper is placed in the pressing structure;

[0041] Figure 5 It is a schematic diagram of the coordination of the rotating shaft torsion spring and the rotating shaft of the base plate in the paper pressing structure of an automatic paper shredder of the present invention;

[0042] Figure 6It is a schematic diagram of the coordination of a rotating shaft torsion spring and a base plate rotating shaft fixing seat in a paper pressing structure of an automatic paper shredder of the present invention;

[0043] Figure 7 It is a structural schematic diagram of a large pressing plate in a paper pressing structure of an automatic paper shredder of the present invention;

[0044] Figure 8 It is a top view of the matching structure of a large pressing plate and a paper pressing base plate in a paper pressing structure of an automatic paper shredder of the present invention;

[0045] Fig. 9 It is a bottom view of the matching structure of a large pressing plate and a paper pressing base plate in a paper pressing structure of an automatic paper shredder of the present invention;

[0046] Fig.10 It is a structural schematic diagram of a small pressing plate in a paper pressing structure of an automatic paper shredder of the present invention;

[0047] Fig.11 It is a top view of the matching structure of the small pressing plate and the paper pressing base plate in the paper pressing structure of an automatic paper shredder of the present invention (the rotating shaft of the pressing plate is in a state of being a whole);

[0048] Fig.12 It is a top view of the cooperation structure of a small pressing plate and a paper pressing base plate in a paper pressing structure of an automatic paper shredder of the present invention (when the pressing plate rotating shaft is split into a plurality of pressing plate small rotating shafts);

[0049] Fig.13 It is a bottom view of the cooperation structure of a small pressing plate and a paper pressing base plate in a paper pressing structure of an automatic paper shredder of the present invention (when the pressing plate rotating shaft is split into a plurality of pressing plate small rotating shafts);

[0050] Fig.14 It is a structural schematic diagram of a paper pressing substrate in a paper pressing structure of an automatic paper shredder of the present invention when it is released;

[0051] Fig.15 The present invention is a schematic structural diagram of a paper pressing substrate in a paper pressing structure of an automatic paper shredder when the substrate returns to a limit position.

[0052]

Explanation of main symbols

[0053] 101- shredder upper cover; 102- shredder lower cover; 103- paper tray; 104- machine cover; 105- paper pressing base plate; 106- base plate rotating shaft; 107- pressing plate rotating shaft; 108- large pressing plate; 109- rotating shaft torsion spring; 110- base plate rotating shaft fixing seat; 111- pressing plate rotating shaft fixing seat; 112- upper paper picking wheel; 113- lower paper picking wheel; 114- upper paper picking wheel shaft; 115- upper paper picking wheel shaft fixing seat; 116- paper pressing strip; 117- large connecting plate; 118- large pressing paper board; 119- first through hole; 120- small pressing plate; 121- small connecting plate; 122- small pressing paper board; 123- pressing plate small rotating shaft; 124- pressing plate small rotating shaft fixing seat; 125- second through hole. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] like Figure 1-15 As shown, the present invention discloses a paper pressing structure of an automatic paper shredder, which is mostly suitable for the situation that a whole A4 paper can be placed flat on the paper support box (similar to a conventional automatic paper shredder), and specifically includes a paper shredder upper cover 101, a paper shredder lower cover 102, a paper support box 103, a machine cover 104, a paper pressing substrate 105, a substrate rotating shaft 106, a large pressing plate torsion spring (not shown), a pressing plate rotating shaft 107, a large pressing plate 108, and two rotating shaft torsion springs 109, a substrate rotating shaft fixing seat 110 and a pressing plate rotating shaft fixing seat 111, wherein:

[0056] The shredder upper cover 101 is fixedly connected with the shredder lower cover 102 up and down;

[0057] The paper support box 103 is recessed above the lower cover 102 of the shredder and forms a receiving cavity for placing stacked papers to be shredded;

[0058] The machine cover 104 is pivotally connected to one end of the shredder upper cover 101 and is used to cover or open the shredder;

[0059] One end of the paper pressing substrate 105 is fixedly connected to the substrate rotating shaft 106;

[0060] The two rotating shaft torsion springs 109 are respectively mounted on the two ends of the substrate rotating shaft 106 and are respectively placed in the two substrate rotating shaft fixing seats 110 located at the two ends of the substrate rotating shaft 106, so as to realize the rotation of the substrate rotating shaft 106 and thus drive the rotation of the paper pressing substrate 105. Figure 5 and6 As shown;

[0061] The two substrate shaft fixing seats 110 are fixedly connected to the inner side of the machine cover 104, and are used to fix the paper pressing substrate 105 to the inner side of the machine cover 104. In this embodiment, the connection method between the substrate shaft fixing seats 110 and the machine cover 104 is not limited, and screw connection, clamping connection, welding and other fixed connection methods can be used.

[0062] The two large pressure plate torsion springs are respectively sleeved on the two ends of the pressure plate shaft 107, and are respectively placed in the two pressure plate shaft fixing seats 111 located at the two ends of the pressure plate shaft 107, so as to realize the rotation of the pressure plate shaft 107 and drive the rotation of the large pressure plate 108. In this embodiment, the connection method of the pressure plate shaft fixing seat 111 and the paper pressing base plate 105 is also not limited, and screw connection, clamping connection, welding and other fixed connection methods can be adopted.

[0063] The large pressing plate 108 is rotatably connected to the bottom of the paper pressing base plate 105 via the pressing plate rotating shaft 107 , and is used to press the stacked papers to be shredded placed on the paper supporting box 103 when the user closes the machine cover 104 .

[0064] like Figure 1 and 2 As shown, the paper pressing structure further includes at least one group of paper pickup roller groups, each group of the paper pickup roller groups includes an upper paper pickup roller 112 and a lower paper pickup roller 113, wherein:

[0065] The upper pickup roller 112 is fixed between two upper pickup roller shaft fixing seats 115 at one end of the paper pressing substrate 105 away from the substrate rotating shaft 106 via an upper pickup roller shaft 114;

[0066] The lower paper pickup wheel 113 is fixed to both sides of the shredder lower cover 102 or fixed between two lower paper pickup wheel shaft fixing seats (not shown) at the lower end of the paper support box 103 through a lower paper pickup wheel shaft (not shown). In this embodiment, the lower paper pickup wheel 113 is arranged on one side of the paper inlet near the pivot connection between the machine cover 104 and the shredder upper cover 101.

[0067] The lower pickup roller 113 partially protrudes from the upper surface of the paper support box 103, and its position is set corresponding to the position of the upper pickup roller 112, so that when the user closes the machine cover 104, the upper pickup roller 112 on the paper pressing base plate 105 presses against the stacked paper to be shredded above the paper support box 103 and cooperates with the lower pickup roller 113 to pick up the paper so that the bottom one or more sheets of the stacked paper to be shredded enter the paper inlet on the paper support box 103. In this embodiment, when the number of the pickup roller groups is one group, a central setting is adopted; when the number of the pickup roller groups is two groups, a symmetrical distribution setting is adopted, such as Figure 8 , 9 , as shown in 11-13.

[0068] Furthermore, a paper pressing strip 116 is provided at one end of the paper pressing substrate 105 away from the substrate rotating shaft 106. The paper pressing strip 116 is made integrally with the paper pressing substrate 105 and is used to press the stacked paper to be shredded on the upper surface of the paper supporting box 103 when the number of stacked paper to be shredded on the paper supporting box 103 is small, which can indirectly increase the efficiency and effect of the shaving nails. In this embodiment, the paper pressing strip 116, the upper pickup wheel shaft fixing seat 115 and the paper pressing substrate 105 are made integrally. In actual operation, the paper pressing strip 116 can be divided into a plurality of paper pressing blocks, which can be set at equal intervals or unequal intervals, and it is best to set it at equal intervals.

[0069] Continue to refer Figure 7 The large pressing plate 108 includes a large connecting plate 117 and a large pressing paper board 118. The large pressing paper board 118 is in contact with the upper surface of the paper supporting box 103 when the paper pressing substrate 105 is naturally released, and is used to press the stacked paper to be shredded on the upper surface of the paper supporting box 103, which can effectively increase the efficiency and effect of shaving nails.

[0070] Furthermore, a first through hole 119 is provided on the large paper pressing plate 118, and the position of the first through hole 119 is adapted to the position of a travel switch partially protruding above the paper supporting box 103, so that the travel switch is placed in the first through hole 119 when the stacked paper to be shredded above the paper supporting box 103 is about to be shredded or has been shredded, and timely feedback on the shredding status is provided.

[0071] Figure 7 In the embodiment, the angle A between the large connecting plate 117 and the large paper pressing plate 118 is greater than or equal to 90 degrees. In actual operation, the angle is mostly greater than 90 degrees, which can effectively reduce the stroke of the paper pressing plate, make the paper pressing structure more streamlined, and save space. Preferably, the large connecting plate 117 and the large paper pressing plate 118 are made in one piece, which can effectively increase the service life of the large paper pressing plate 108 and will not be strained due to multiple paper pressing.

[0072] In another embodiment, if Figure 10-13 As shown, the large pressure plate 108 is split into several small pressure plates 120, each of which includes a small connecting plate 121 and a small pressure paper board 122. Each of the small pressure paper boards 122 is in contact with the upper surface of the paper support box 103 when the paper pressing substrate 105 is naturally released, and is used to press the stacked paper to be shredded onto the upper surface of the paper support box 103, which can effectively increase the efficiency and effect of shaving nails.

[0073] When the pressing plate rotating shaft 107 is split into a plurality of pressing plate small rotating shafts 123, as shown in FIG. Fig.12 and 13 As shown, the number of the small pressure plate shafts 123 is the same as the number of the small pressure plates 120, and the small connecting plates 121 of the small pressure plates 120 are respectively fixedly connected to the small pressure plate shafts 123, and are fixedly connected to the paper pressing base plate 105 through the small pressure plate torsion springs (not shown) at both ends of the small pressure plate shafts 123 and the small pressure plate shaft fixing seats 124. In this embodiment, the number of the small pressure plate shafts 123 is not limited; or,

[0074] When the pressing plate rotating shaft 107 is a whole piece, Fig.11 As shown, the small connecting plates 121 of the several small pressure plates 120 are fixedly connected thereto, and are fixedly connected to the paper pressing base plate 105 through the large pressure plate torsion springs at both ends of the pressure plate shaft 107 and the pressure plate shaft fixing seat 111. The use of the entire pressure plate shaft 107 can effectively save the cost of multiple pressure plate small shafts 123 and their matching pressure plate small shaft fixing seats 124, and can better ensure the consistency of the flipping angles of each small pressure plate 120.

[0075] Further references Fig.10 and 13 A second through hole 125 is provided on a central one of the plurality of small paper press boards 122, and the position of the second through hole 125 is matched with the position of a travel switch partially protruding above the paper support box 103, so that the travel switch is placed in the second through hole 125 when the stacked papers to be shredded above the paper support box 103 are about to be shredded or have been shredded, and timely feedback on the shredding status is given.

[0076] Fig.10In the embodiment, the angles between each of the small connecting plates 121 and the small paper pressing plate 122 are the same, and the angle B is greater than or equal to 90 degrees. In actual operation, the angle is mostly selected to be greater than 90 degrees, which can effectively reduce the stroke of the paper pressing plate, make the paper pressing structure more streamlined, and save space. Preferably, each of the small connecting plates 121 and the small paper pressing plate 122 are made in one piece. The use of an integrated structure can effectively increase the service life of the small pressing plate 120, and will not be strained by multiple paper pressing. In addition, it can also indirectly ensure that the angles between each of the small connecting plates 121 and the small paper pressing plate 122 are the same, so that the force on the upper surface of the stacked paper to be shredded above the paper support box 103 is more uniform.

[0077] In this embodiment, the base plate rotating shaft 106 is arranged away from the pivotal connection between the cover 104 and the shredder upper cover 101, and the paper rubbing roller group is located on the side of the paper inlet close to the pivotal connection between the cover 104 and the shredder upper cover 101, and the corresponding large pressing plate 108 (or a plurality of small pressing plates 120) are located on the side of the paper inlet away from the pivotal connection between the cover 104 and the shredder upper cover 101. The above position setting can effectively ensure that the bottommost paper of the stacked paper to be shredded on both sides of the paper inlet can be rubbed from both sides to the top of the paper inlet.

[0078] The invention also discloses an automatic paper shredder, comprising the above-mentioned paper pressing structure.

[0079] Specific working principle:

[0080] When the user opens the cover 104, the paper pressing substrate 105 is in a naturally released state due to gravity (eg Fig.14 ), the stacked paper to be shredded is placed on the paper tray 103 and then the cover 104 is closed, the large pressing plate 108 (or a plurality of small pressing plates 120) on the paper pressing substrate 105 presses against the upper surface of the stacked paper to be shredded, and the paper pressing substrate 105 is squeezed back into place (such as Figure 4 As the stack of paper to be shredded decreases, the paper pressing base plate 105 descends, and the upper paper picking wheel 112 gradually presses the upper surface of the stack of paper to be shredded. At the same time, the paper pressing strip 116 presses against the upper surface of the stack of paper to be shredded (such as Figure 3 ), can effectively increase the efficiency of paper rubbing.

[0081] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A paper pressing structure for an automatic paper shredder, characterized in that: It includes a shredder upper cover, a shredder lower cover, a paper tray, a machine cover, a paper pressing base plate, a base plate rotating shaft, a large pressing plate torsion spring, a pressing plate rotating shaft, a large pressing plate, two rotating shaft torsion springs, a base plate rotating shaft fixing seat, a pressing plate rotating shaft fixing seat, and at least one set of paper pickup rollers, wherein: The upper cover of the shredder is fixedly connected with the lower cover of the shredder up and down; The paper support box is recessed above the lower cover of the paper shredder to form a receiving cavity for placing stacked papers to be shredded; The machine cover is pivotally connected to one end of the upper cover of the shredder and is used to cover or open the shredder; One end of the paper pressing substrate is fixedly connected to the substrate rotating shaft; The base plate rotation axis is arranged away from the pivotal connection between the machine cover and the upper cover of the shredder; The two rotating shaft torsion springs are respectively sleeved on the two ends of the substrate rotating shaft, and are respectively placed in the two substrate rotating shaft fixing seats located at the two ends of the substrate rotating shaft, so as to realize the rotation of the substrate rotating shaft and thus drive the rotation of the paper pressing substrate; The two substrate rotating shaft fixing seats are fixedly connected to the inner side of the machine cover, and are used to fix the paper pressing substrate to the inner side of the machine cover; The two large pressure plate torsion springs are respectively sleeved on the two ends of the pressure plate rotating shaft, and are respectively placed in the two pressure plate rotating shaft fixing seats located at the two ends of the pressure plate rotating shaft, so as to realize the rotation of the pressure plate rotating shaft and thus drive the rotation of the large pressure plate; The large pressing plate is rotatably connected to the bottom of the paper pressing base plate through the pressing plate rotating shaft, and is used to press the stacked paper to be shredded placed above the paper supporting box when the user closes the machine cover; Each group of the pickup rollers comprises an upper pickup roller and a lower pickup roller, wherein: The upper pickup wheel is fixed between two upper pickup wheel shaft fixing seats at one end of the paper pressing base plate away from the base plate rotating shaft through the upper pickup wheel shaft; The lower pickup wheel is fixed to both sides of the lower cover of the shredder or fixed between two lower pickup wheel shaft fixing seats at the lower end of the paper support box through the lower pickup wheel shaft; The lower paper pickup wheel partially protrudes from the upper surface of the paper support box, and its position is set corresponding to the position of the upper paper pickup wheel. When the user closes the machine cover, the upper paper pickup wheel on the paper pressing base plate presses against the stacked paper to be shredded above the paper support box and cooperates with the lower paper pickup wheel to pick up the paper, so that the bottom one or more papers of the stacked paper to be shredded enter the paper inlet on the paper support box.

2. The paper pressing structure of an automatic paper shredder according to claim 1, characterized in that: A paper pressing strip is arranged at one end of the paper pressing substrate away from the substrate rotating shaft. The paper pressing strip is integrally formed with the paper pressing substrate and is used to press the stacked paper to be shredded onto the upper surface of the paper supporting box when the number of stacked paper to be shredded above the paper supporting box is small.

3. The paper pressing structure of an automatic paper shredder according to claim 1, characterized in that: The large pressing plate includes a large connecting plate and a large pressing paper plate. The large pressing paper plate is in contact with the upper surface of the paper supporting box when the paper pressing base plate is naturally released, and is used to press the stacked paper to be shredded onto the upper surface of the paper supporting box.

4. The paper pressing structure of an automatic paper shredder according to claim 3, characterized in that: A first through hole is provided on the large paper pressing plate, and the position of the first through hole is matched with the position of a travel switch partially protruding above the paper supporting box, so that the travel switch is placed in the first through hole when the stacked papers to be shredded above the paper supporting box are about to be shredded or have been shredded, and timely feedback on the shredding status is given.

5. The paper pressing structure of an automatic paper shredder according to claim 3, characterized in that: The angle between the large connecting plate and the large pressing paper board is greater than or equal to 90 degrees.

6. The paper pressing structure of an automatic paper shredder according to claim 3, characterized in that: The large connecting plate and the large pressing paper board are made in one piece.

7. The paper pressing structure of an automatic paper shredder according to claim 3, characterized in that: The large pressing plate is split into several small pressing plates, each of which includes a small connecting plate and a small pressing paper plate. Each small pressing paper plate is in contact with the upper surface of the paper supporting box when the paper pressing base plate is naturally released, so as to press the stacked paper to be shredded tightly against the upper surface of the paper supporting box.

8. The paper pressing structure of an automatic paper shredder according to claim 7, characterized in that: When the pressure plate shaft is a whole shaft, a number of small connecting plates of the small pressure plates are fixedly connected to it, and are fixedly connected to the paper pressing base plate through large pressure plate torsion springs at both ends of the pressure plate shaft and a pressure plate shaft fixing seat; or, When the pressure plate shaft is split into several small pressure plate shafts, the number of the small pressure plate shafts is the same as the number of the small pressure plates, and the small connecting plates of the several small pressure plates are respectively fixedly connected to the several small pressure plate shafts, and are fixedly connected to the paper pressing base plate through the small pressure plate torsion springs at both ends of the pressure plate shafts and the pressure plate shaft fixing seats.

9. The paper pressing structure of an automatic paper shredder according to claim 7, characterized in that: A second through hole is provided on a central one of the plurality of small paper presses, and the position of the second through hole is matched with the position of a travel switch partially protruding above the paper support box, so that the travel switch is placed in the second through hole when the stacked papers to be shredded above the paper support box are about to be shredded or have been shredded, and timely feedback on the shredding status is provided.

10. The paper pressing structure of an automatic paper shredder according to claim 7, characterized in that: The included angles between each of the small connecting plates and the small pressing paper board are the same, and are greater than or equal to 90 degrees.

11. The paper pressing structure of an automatic paper shredder according to claim 7, characterized in that: Each of the small connecting plates and the small pressing paper board is made in one piece.

12. An automatic paper shredder, characterized in that: The invention comprises the paper pressing structure described in any one of claims 1 to 11.

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