Paper shredder with improved paper pressing mechanism

Abstract

The utility model discloses a paper shredder with an improved paper pressing mechanism, the paper pressing mechanism comprises a first paper pressing assembly, at least one second paper pressing assembly and at least one third paper pressing assembly, the first paper pressing assembly is elastically connected with the lower part of a machine cover through a first elastic piece; the second paper pressing assembly and the third paper pressing assembly are elastically connected with the lower portion of the first paper pressing assembly through second elastic pieces respectively, the second paper pressing assembly is located on one side of the paper inlet, and the third paper pressing assembly is located above the detection assembly. A second-stage elastic paper pressing structure is formed through the first paper pressing assembly and the second paper pressing assembly, the pressure on paper is increased, the friction force between the paper and the paper rubbing roller is increased, and the paper feeding success rate is increased; the third paper pressing assembly elastically abuts against the position, located on the detection assembly, of the paper to prevent the paper from upwarping, the pressure of the paper on the detection assembly is improved, and therefore the situation that the paper cannot trigger the detection assembly is prevented, the paper detection accuracy is improved, the paper detection device can adapt to different numbers of paper, and remaining paper is avoided.

Description

Technical Field

[0001] This utility model relates to the field of paper shredder technology, and in particular to a paper shredder with an improved paper pressing mechanism. Background Technology

[0002] A paper shredder is an office supply used to shred paper. It cuts paper documents containing information into smaller pieces to prevent them from being recovered, thus achieving confidentiality. Since the amount of paper shredded at a time is limited, to improve efficiency, a paper tray is located at the top of the shredder. The paper inlet is located at the bottom of the tray, and a cover is installed above it. Paper feed rollers are located next to the paper inlet. A paper pressing mechanism is connected to the bottom of the cover via a spring mechanism. A microswitch is located on one side of the tray bottom to detect the presence of paper. When shredding, multiple sheets of paper are stacked in the tray. The paper pressing mechanism presses the paper against the paper feed rollers. This presses against the microswitch, automatically starting the shredder. The paper feed rollers then feed the paper one by one into the paper inlet, achieving fully automatic paper feeding without manual paper feeding or starting / stopping. This improves shredding efficiency, reduces the risk of paper jams, and enhances ease of use. When the number of sheets of paper is large, the pressure exerted on the elastic element is greater, resulting in greater pressure on the paper and increased friction between the paper feed rollers and the paper. However, as the number of sheets decreases, the pressure exerted on the paper by the elastic element decreases, and the friction between the paper feed rollers and the paper decreases, leading to slippage between the paper and the paper feed rollers and preventing paper from feeding. To solve this problem, Chinese Utility Model Patent CN201320637667.3 describes an automatic paper feed shredder with a paper pressing mechanism. This patent increases the downward stroke of the paper pressing mechanism and the pressure of the paper pressing mechanism in the initial state by providing at least one set of independently movable paper pressing mechanisms on the inner side of the paper pressing platform to increase friction. This patent addresses the issue of paper tails not curling upwards when shredding large quantities of paper, such as more than 60 sheets. Due to the large number and weight of the paper, even with significant pressure on the feed rollers, the tails of the sheets cannot curl upwards. Similarly, when shredding smaller quantities, such as less than 20 sheets, the lower overall toughness of the paper prevents the tails from curling upwards significantly. However, when shredding a moderate quantity of paper, such as 20 to 60 sheets, the increased toughness and lighter weight of the paper, combined with the greater pressure on the feed rollers, causes the tails to curl upwards considerably. This can lead to the paper detaching from the microswitch, making accurate detection impossible and resulting in unshredded paper remaining. Therefore, improvements are necessary. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a paper shredder with an improved paper pressing mechanism, which improves the accuracy of paper detection, can adapt to different quantities of paper, improves the paper feeding success rate, and avoids the occurrence of leftover paper.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a paper shredder with an improved paper pressing mechanism, comprising a shredder head and a shredder bin. The shredder head is disposed on the upper part of the shredder bin, and the upper part of the shredder head is provided with an upward-facing paper trough. A cover is hinged to one side of the upper part of the shredder head, and the cover is disposed on the paper trough. The bottom of the paper trough is provided with a paper inlet, a paper feed roller, and a detection component for detecting paper. The paper feed roller is disposed on one side of the paper inlet. A paper shredding mechanism is disposed inside the shredder head, and the paper shredding mechanism is located below the paper inlet. A paper pressing mechanism is disposed on the lower part of the cover. The paper pressing mechanism includes a first paper pressing component, at least one second paper pressing component, and at least one third paper pressing component. The first paper pressing component is elastically connected to the lower part of the cover through a first elastic element. The second paper pressing component and the third paper pressing component are elastically connected to the lower part of the first paper pressing component through second elastic elements, respectively. The second paper pressing component is located on one side of the paper inlet, and the third paper pressing component is located above the detection component.

[0005] In a further technical solution, the second paper pressing assembly includes a second paper pressing frame and a second roller. The left and right sides of the second paper pressing frame are respectively provided with upwardly extending second connecting parts. The upper outer sides of the two second connecting parts are respectively provided with second buckles. The corresponding first paper pressing assembly is provided with second connecting slots at the positions of the two second connecting parts. The two second connecting parts are slidably installed in the two second connecting slots respectively. The two second buckles pass through the two second connecting slots and are limited and engaged with the first paper pressing assembly. The second roller is rotatably installed on the lower part of the second paper pressing frame. In the initial state, the lower part of the second roller protrudes from the lower end face of the first paper pressing assembly. The second elastic element is disposed between the second paper pressing frame and the first paper pressing assembly.

[0006] In a further technical solution, a Y-shaped groove is provided on one side of the second paper pressing frame, and a guide protrusion is provided on the corresponding first paper pressing component. The Y-shaped groove and the guide protrusion are matched for limiting.

[0007] In a further technical solution, at least one paper-pressing protrusion is provided on the periphery of the second roller.

[0008] In a further technical solution, the third paper pressing assembly includes a paper pressing protrusion. The lower part of the first paper pressing assembly has a third paper pressing groove. The paper pressing protrusion is slidably installed in the third paper pressing groove. In the initial state, the lower part of the paper pressing protrusion protrudes downward from the third paper pressing groove. Two third connecting parts are respectively provided on opposite sides of the upper part of the paper pressing protrusion. The outer side of the upper part of the two third connecting parts is respectively provided with a third buckle. The upper part of the corresponding third paper pressing groove has two third connecting slots. The two third connecting parts are slidably installed in the two third connecting slots respectively. The two third buckles pass through the two third connecting slots and are limited and engaged with the first paper pressing assembly. The second elastic element is disposed between the paper pressing protrusion and the first paper pressing assembly.

[0009] In a further technical solution, at least two paper-pressing protrusions are provided on the lower end face of the paper-pressing protrusion, and the two paper-pressing protrusions are spaced apart.

[0010] In a further technical solution, the paper pressing mechanism is provided with multiple second paper pressing components and two third paper pressing components. Each second paper pressing component is arranged at intervals along the length direction of the paper inlet, and the two third paper pressing components are respectively arranged on the left and right sides of the detection component. The first elastic element and the second elastic element are both springs.

[0011] The lower part of the first paper pressing assembly is provided with a paper pressing roller, which is located above the paper feeding roller. The second paper pressing assembly is located between the paper pressing roller and the paper inlet.

[0012] In a further technical solution, the first paper pressing assembly includes a first pressing plate, a second pressing plate, and two paper pressing connectors. Both the first and second pressing plates are elastically connected to the lower part of the machine cover through a first elastic member. The first and second pressing plates are spaced apart and located on both sides of the paper inlet. The two paper pressing connectors are connected to the left and right ends of the first and second pressing plates, respectively. The first pressing plate, the second pressing plate, and the two paper pressing connectors enclose and form a paper through hole, which is located above the paper inlet. The machine cover has a paper insertion channel that penetrates the machine cover at the position corresponding to the paper through hole, and the paper insertion channel is located above the paper through hole.

[0013] In a further technical solution, the bottom of the paper trough is provided with a flat paper pressing platform and an inclined paper pressing platform. The flat paper pressing platform and the inclined paper pressing platform are located on both sides of the paper inlet. The flat paper pressing platform is set horizontally, and the inclined paper pressing platform is set inclined towards the paper inlet. The first pressing plate is located above the inclined paper pressing platform, and the second pressing plate is located above the flat paper pressing platform. The paper feeding roller and the detection component are both set on the inclined paper pressing platform, and the paper pressing roller, the second pressing component and the third pressing component are all set on the first pressing plate.

[0014] In a further technical solution, the first paper pressing assembly has a downward-facing pressure roller mounting groove, and pressure roller sliding grooves are respectively provided at both ends of the pressure roller mounting groove. The left and right ends of the paper pressing roller are slidably installed in the pressure roller sliding grooves. In the initial state, the lower part of the paper pressing roller protrudes out of the pressure roller mounting groove, and a guide arc surface is provided on the side of the paper inlet adjacent to the paper feeding roller.

[0015] The advantages of this invention compared to existing technologies are as follows: The first and second paper-pressing components form a two-stage elastic paper-pressing structure, thereby increasing the elastic displacement stroke of the paper-pressing mechanism, increasing the pressure on the paper, increasing the friction between the paper and the paper feed roller, and improving the paper feeding success rate. The third paper-pressing component elastically presses the paper against the detection component to prevent it from tilting upwards, increasing the pressure of the paper on the detection component, thus preventing the paper from failing to trigger the detection component, improving the accuracy of paper detection, adapting to different quantities of paper, and avoiding excess paper. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram illustrating the state of the present invention when a large amount of paper is shredded;

[0020] Figure 4 This is a schematic diagram illustrating the state of the paper when a small amount of paper is shredded according to this utility model;

[0021] Figure 5 This is a schematic diagram of the paper pressing mechanism of this utility model;

[0022] Figure 6 This is an exploded view of the paper pressing mechanism of this utility model.

[0023] In the picture:

[0024] 1 First paper pressing assembly, 11 First paper pressing board, 111 Second connecting slot, 112 Guide protrusion, 113 Third paper pressing groove, 114 Third connecting slot, 115 Pressure roller mounting groove, 116 Pressure roller groove, 12 Second paper pressing board, 13 Paper pressing connector, 14 Paper through hole, 15 Paper pressing roller;

[0025] 2 Second paper pressing assembly, 21 Second paper pressing frame, 211 Y-shaped groove, 212 Second connecting part, 213 Second buckle, 22 Second roller;

[0026] 3 Third paper pressing assembly, 31 Paper pressing protrusion, 311 Third connecting part, 312 Third buckle, 313 Paper pressing protrusion;

[0027] 41 First elastic element, 42 Second elastic element;

[0028] 5 Shredder head, 51 Paper trough, 511 Flat paper pressing table, 512 Inclined paper pressing table, 52 Machine cover, 521 Paper insertion channel, 53 Paper inlet, 531 Guide arc surface, 54 Paper feed roller, 55 Detection component, 56 Shredding mechanism; 6 Shredder bin. Detailed Implementation

[0029] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0030] A paper shredder with an improved paper pressing mechanism, such as Figures 1 to 6 As shown, the shredder includes a shredder head 5 and a shredder bin 6. The shredder head 5 is located on top of the shredder bin 6. The upper part of the shredder head 5 has an upward-facing paper trough 51. A cover 52 is hinged to one side of the upper part of the shredder head 5, covering the paper trough 51. The bottom of the paper trough 51 has a paper inlet 53, a paper feed roller 54, and a detection component 55 for detecting paper. The paper feed roller 54 is located on one side of the paper inlet 53. A shredding mechanism 56 is located inside the shredder head 5, at the paper inlet. Below 53, a paper pressing mechanism is provided at the lower part of the machine cover 52. The paper pressing mechanism includes a first paper pressing component 1, at least one second paper pressing component 2, and at least one third paper pressing component 3. The first paper pressing component 1 is elastically connected to the lower part of the machine cover 52 through a first elastic member 41. The second paper pressing component 2 and the third paper pressing component 3 are elastically connected to the lower part of the first paper pressing component 1 through a second elastic member 42, respectively. The second paper pressing component 2 is located on one side of the paper inlet 53, and the third paper pressing component 3 is located above the detection component 55. In traditional paper shredders, the pressure point of the paper is mainly on the paper feed roller 54 during pressing. When the amount of paper decreases, the side of the paper away from the paper feed roller 54 will curl up under the pressure of the pressing mechanism. This will prevent the detection component 55 used to detect the paper from being triggered, resulting in unshredded paper residue. This invention forms a two-stage elastic pressing structure by using the first pressing component 1 and the second pressing component 2, thereby increasing the elastic displacement stroke of the pressing mechanism, increasing the pressure on the paper, increasing the friction between the paper and the paper feed roller 54, and improving the paper feeding success rate. The third pressing component 3 elastically presses the paper to the position of the detection component 55 to prevent the paper from curling up, increasing the pressure of the paper on the detection component 55, thereby preventing the paper from failing to trigger the detection component, improving the accuracy of paper detection, adapting to different amounts of paper, and avoiding the occurrence of unshredded paper.

[0031] Specifically, the second paper pressing assembly 2 includes a second paper pressing frame 21 and a second roller 22. The left and right sides of the second paper pressing frame 21 are respectively provided with upwardly extending second connecting parts 212. The upper outer sides of the two second connecting parts 212 are respectively provided with second buckles 213. The corresponding first paper pressing assembly 1 is provided with second connecting slots 111 at the positions of the two second connecting parts 212. The two second connecting parts 212 are slidably installed in the two second connecting slots 111 respectively. The two second buckles 213 pass through the two second connecting slots 111 respectively and are limited to the first paper pressing assembly 1. The second roller 22 is rotatably installed on the lower part of the second paper pressing frame 21. In the initial state, the lower part of the second roller 22 protrudes from the lower end face of the first paper pressing assembly 1. The second elastic member 42 is disposed between the second paper pressing frame 21 and the first paper pressing assembly 1. The second paper pressing assembly 2 presses the upper part of the paper by the second roller 22, and reduces the resistance when feeding the paper by rolling friction. The second paper pressing frame 21 is slidably installed on the first paper pressing assembly 1 by two second connecting parts 212 and is limited by two second buckles 213. The structure is simple, the cost is low, it is easy to assemble, and it improves production efficiency.

[0032] Specifically, a Y-shaped groove 211 is provided on one side of the second paper presser 21, and a corresponding guide protrusion 112 is provided on the first paper presser assembly 1. The Y-shaped groove 211 and the guide protrusion 112 are engaged in a limiting fit. The Y-shaped groove 211 and the guide protrusion 112 play a positioning and guiding role when assembling the second paper presser 21. When the second paper presser 21 moves up and down, the Y-shaped groove 211 and the guide protrusion 112 can further limit the second paper presser 21, preventing the second paper presser 21 from shaking when moving, and ensuring that the rotation axis of the second roller 22 remains parallel to the rotation axis of the paper feed roller 54, thereby improving the smoothness of paper feeding and reducing the risk of paper jams.

[0033] Specifically, at least one paper-pressing protrusion (not shown in the figure) is provided on the periphery of the second roller 22. The paper-pressing protrusion reduces the contact area between the second roller 22 and the paper, increases the pressure, and further increases the paper-pressing force.

[0034] Specifically, the third paper pressing assembly 3 includes a paper pressing protrusion 31. The lower part of the first paper pressing assembly 1 is provided with a third paper pressing groove 113. The paper pressing protrusion 31 is slidably installed in the third paper pressing groove 113. In the initial state, the lower part of the paper pressing protrusion 31 protrudes downward from the third paper pressing groove 113. Two third connecting parts 311 are respectively provided on opposite sides of the upper part of the paper pressing protrusion 31. The outer side of the upper part of the two third connecting parts 311 is respectively provided with a third buckle 312. Correspondingly, two third connecting slots 114 are provided on the upper part of the third paper pressing groove 113. The two third connecting parts 311 are slidably installed in the two third connecting slots 114 respectively. The two third buckles 312 pass through the two third connecting slots 114 respectively and are limited and cooperated with the first paper pressing assembly 1. The second elastic member 42 is provided between the paper pressing protrusion 31 and the first paper pressing assembly 1. The paper pressing protrusion 31 is slidably mounted on the first paper pressing assembly 1 through two third connecting parts 311 and is limited by the third buckle 312. The structure is simple, the cost is low, it is easy to assemble, and it improves production efficiency. The paper pressing protrusion 31 is slidably mounted in the third paper pressing groove 113, which can limit the paper pressing protrusion 31 in the horizontal direction.

[0035] Specifically, the lower end face of the paper pressing protrusion 31 is provided with at least two paper pressing protrusions 313, which are spaced apart. The paper pressing protrusions 313 reduce the contact area between the paper pressing protrusion 31 and the paper, increase the pressure, further increase the paper pressing force, and at the same time reduce the friction between the paper and the paper, thereby reducing the paper feeding resistance.

[0036] Specifically, the paper pressing mechanism is provided with multiple second paper pressing components 2 and two third paper pressing components 3. Each second paper pressing component 2 is arranged at intervals along the length direction of the paper inlet 53. The two third paper pressing components 3 are respectively arranged on the left and right sides of the detection component 55. The first elastic element 41 and the second elastic element 42 are both springs. A paper pressing roller 15 is provided at the lower part of the first paper pressing component 1. The paper pressing roller 15 is located above the paper feeding roller 54. The second paper pressing component 2 is located between the paper pressing roller 15 and the paper inlet 53. Multiple second paper pressing components 2 are spaced apart to independently float and press the paper, adapting to paper of different widths and reducing the contact area with the paper, thus reducing paper feeding resistance. A gap is formed between two spaced third paper pressing components 3 to avoid the detection component 55, so that the detection component 55 and the third paper pressing component 3 are staggered. The lower end face of the third paper pressing component 3 can move to below the upper end face of the detection component 55. This not only allows the paper to have greater pressure at the position of the detection component 55, but also prevents the third paper pressing component 3 from contacting the detection component 55 and causing false triggering when there is no paper, thus improving detection accuracy.

[0037] Specifically, the first paper pressing assembly 1 includes a first pressing plate 11, a second pressing plate 12, and two paper pressing connectors 13. Both the first pressing plate 11 and the second pressing plate 12 are elastically connected to the lower part of the machine cover 52 via a first elastic member 41. The first pressing plate 11 and the second pressing plate 12 are spaced apart and located on both sides of the paper inlet 53. The two paper pressing connectors 13 are respectively connected to the left and right ends of the first pressing plate 11 and the second pressing plate 12. The first pressing plate 11, the second pressing plate 12, and the two paper pressing connectors 13 enclose a paper through hole 14, located above the paper inlet 53. The machine cover 52 has a paper insertion channel 521 corresponding to the position of the paper through hole 14, located above the paper through hole 14. When shredding a small quantity of paper individually, it is not necessary to open the machine cover 52; the paper can be directly inserted into the paper inlet 53 by passing through the paper insertion channel 521 and the paper through hole 14, improving practicality and convenience.

[0038] Specifically, the bottom of the paper trough 51 is provided with a flat paper pressing platform 511 and an inclined paper pressing platform 512. The flat paper pressing platform 511 and the inclined paper pressing platform 512 are located on both sides of the paper inlet 53. The flat paper pressing platform 511 is horizontally arranged, and the inclined paper pressing platform 512 is inclined towards the paper inlet 53. The first pressing plate 11 is located above the inclined paper pressing platform 512, and the second pressing plate 12 is located above the flat paper pressing platform 511. The paper feeding roller 54 and the detection component 55 are both arranged on the inclined paper pressing platform 512. The paper pressing roller 15, the second paper pressing component 2 and the third paper pressing component 3 are all arranged on the first pressing plate 11. The second pressure plate 12 applies planar pressure to the first side of the paper, thereby elastically pressing the first side of the paper between the planar pressure plate 511 and the second pressure plate 12 to fix the paper. Meanwhile, the first pressure plate 11 applies oblique pressure to the second side of the paper, causing the second side of the paper to tilt and bend. This facilitates the paper feed roller 54 to rub the middle of the paper, creating a larger bend, allowing the bent part of the paper to be inserted into the paper inlet 53 and wound into the shredder mechanism 56, further improving the paper feeding success rate.

[0039] Specifically, the first paper pressing assembly 1 has a downward-facing pressure roller mounting groove 115. Pressure roller sliding grooves 116 are respectively provided at both ends of the pressure roller mounting groove 115. The left and right ends of the paper pressing roller 15 are slidably installed within the pressure roller sliding grooves 116. In the initial state, the lower part of the paper pressing roller 15 protrudes from the pressure roller mounting groove 115. A guide arc surface 531 is provided on the side of the paper inlet 53 adjacent to the paper feed roller 54. The paper pressing roller 15 can cooperate with the paper feed roller 54 to further reduce paper feeding resistance and increase paper pressing force. When dealing with a large number of paper scraps, the paper pressing roller 15 can move relatively upward to avoid paper jams caused by excessive pressure.

[0040] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A paper shredder with an improved paper pressing mechanism, comprising a shredder head (5) and a shredder bin (6), wherein the shredder head (5) is disposed on the upper part of the shredder bin (6), and an upward-facing paper trough (51) is disposed on the upper part of the shredder head (5), and a cover (52) is hinged to one side of the upper part of the shredder head (5), the cover (52) covering the paper trough (51), and a paper inlet (53), a paper feed roller (54), and a detection component (55) for detecting paper are disposed at the bottom of the paper trough (51), the paper feed roller (54) being disposed on one side of the paper inlet (53), a paper shredding mechanism (56) being disposed inside the shredder head (5), the paper shredding mechanism (56) being located below the paper inlet (53), and a paper pressing mechanism being disposed at the lower part of the cover (52), characterized in that: The paper pressing mechanism includes a first paper pressing assembly (1), at least one second paper pressing assembly (2) and at least one third paper pressing assembly (3). The first paper pressing assembly (1) is elastically connected to the lower part of the machine cover (52) through a first elastic member (41). The second paper pressing assembly (2) and the third paper pressing assembly (3) are elastically connected to the lower part of the first paper pressing assembly (1) through the second elastic member (42) respectively. The second paper pressing assembly (2) is located on one side of the paper inlet (53), and the third paper pressing assembly (3) is located above the detection assembly (55).

2. A paper shredder with an improved paper pressing mechanism according to claim 1, characterized in that: The second paper pressing assembly (2) includes a second paper pressing frame (21) and a second roller (22). The left and right sides of the second paper pressing frame (21) are respectively provided with upwardly extending second connecting parts (212). The upper outer sides of the two second connecting parts (212) are respectively provided with second buckles (213). Correspondingly, the first paper pressing assembly (1) is provided with a second connecting slot (111) at the position of the two second connecting parts (212). The two second connecting parts (212) are respectively slidably installed in the two second connecting slots (111). The two second buckles (213) pass through the two second connecting slots (111) and are limited to the first paper pressing assembly (1). The second roller (22) is rotatably installed in the lower part of the second paper pressing frame (21). In the initial state, the lower part of the second roller (22) protrudes from the lower end face of the first paper pressing assembly (1). The second elastic element (42) is provided between the second paper pressing frame (21) and the first paper pressing assembly (1).

3. A paper shredder with an improved paper pressing mechanism according to claim 2, characterized in that: The second paper presser (21) has a Y-shaped groove (211) on one side, and the corresponding first paper presser assembly (1) has a guide protrusion (112). The Y-shaped groove (211) and the guide protrusion (112) are matched for positioning.

4. A paper shredder with an improved paper pressing mechanism according to claim 2, characterized in that: The second roller (22) has at least one paper-pressing protrusion on its periphery.

5. A paper shredder with an improved paper pressing mechanism according to claim 1, characterized in that: The third paper pressing assembly (3) includes a paper pressing protrusion (31). The lower part of the first paper pressing assembly (1) is provided with a third paper pressing groove (113). The paper pressing protrusion (31) is slidably installed in the third paper pressing groove (113). In the initial state, the lower part of the paper pressing protrusion (31) protrudes downward from the third paper pressing groove (113). Two third connecting parts (311) are respectively provided on opposite sides of the upper part of the paper pressing protrusion (31). The upper outer part of the two third connecting parts (311) Each side is provided with a third buckle (312), and the upper part of the corresponding third paper pressing groove (113) is provided with two third connecting slots (114). The two third connecting parts (311) are slidably installed in the two third connecting slots (114). The two third buckles (312) pass through the two third connecting slots (114) and are limited to the first paper pressing assembly (1). The second elastic element (42) is provided between the paper pressing protrusion (31) and the first paper pressing assembly (1).

6. A paper shredder with an improved paper pressing mechanism according to claim 5, characterized in that: The lower end face of the paper pressing protrusion (31) is provided with at least two paper pressing protrusions (313), and the two paper pressing protrusions (313) are spaced apart.

7. A paper shredder with an improved paper pressing mechanism according to any one of claims 1 to 6, characterized in that: The paper pressing mechanism is provided with a plurality of second paper pressing components (2) and two third paper pressing components (3). Each second paper pressing component (2) is arranged at intervals along the length direction of the paper inlet (53). The two third paper pressing components (3) are respectively arranged on the left and right sides of the detection component (55). The first elastic element (41) and the second elastic element (42) are both springs. The lower part of the first paper pressing assembly (1) is provided with a paper pressing roller (15), which is located above the paper feeding roller (54). The second paper pressing assembly (2) is located between the paper pressing roller (15) and the paper inlet (53).

8. A paper shredder with an improved paper pressing mechanism according to claim 7, characterized in that: The first paper pressing assembly (1) includes a first pressing plate (11), a second pressing plate (12), and two paper pressing connectors (13). The first pressing plate (11) and the second pressing plate (12) are elastically connected to the lower part of the machine cover (52) through the first elastic member (41). The first pressing plate (11) and the second pressing plate (12) are spaced apart and located on both sides of the paper inlet (53). The two paper pressing connectors (13) are connected to the left and right ends of the first pressing plate (11) and the second pressing plate (12). The first pressing plate (11), the second pressing plate (12), and the two paper pressing connectors (13) enclose a paper through hole (14). The paper through hole (14) is located above the paper inlet (53). The machine cover (52) has a paper insertion channel (521) that penetrates the machine cover (52) at the position corresponding to the paper through hole (14). The paper insertion channel (521) is located above the paper through hole (14).

9. A paper shredder with an improved paper pressing mechanism according to claim 8, characterized in that: The bottom of the paper trough (51) is provided with a flat paper pressing platform (511) and an inclined paper pressing platform (512). The flat paper pressing platform (511) and the inclined paper pressing platform (512) are respectively located on both sides of the paper inlet (53). The flat paper pressing platform (511) is horizontally arranged, and the inclined paper pressing platform (512) is inclined towards the paper inlet (53). The first pressing plate (11) is located above the inclined paper pressing platform (512), and the second pressing plate (12) is located above the flat paper pressing platform (511). The paper feeding roller (54) and the detection component (55) are both arranged on the inclined paper pressing platform (512). The paper pressing roller (15), the second paper pressing component (2) and the third paper pressing component (3) are all arranged on the first pressing plate (11).

10. A paper shredder with an improved paper pressing mechanism according to claim 7, characterized in that: The first paper pressing assembly (1) has a downward-facing pressure roller mounting groove (115). Pressure roller sliding grooves (116) are respectively provided at both ends of the pressure roller mounting groove (115). The left and right ends of the paper pressing roller (15) are respectively slidably installed in the pressure roller sliding grooves (116). In the initial state, the lower part of the paper pressing roller (15) protrudes out of the pressure roller mounting groove (115). A guide arc surface (531) is provided on the side of the paper inlet (53) adjacent to the paper feed roller (54).

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