A safe paper shredder

Abstract

The present invention relates to the field of waste paper processing technology, specifically a safe paper shredder, comprising a shredder body, a front outer shell surface of the shredder body is provided with a paper feed slot, a conveyor is fixedly installed on the inner wall of the paper feed slot, a side panel is fixedly installed on the frame of the conveyor, and the side panels are symmetrically fixedly connected to the side panels with a carrier plate. The safe paper shredder can automatically tear the paper sheets of a loose-leaf book from the coils one by one, and use the conveyor to feed the paper into the shredder body for shredding, so that the coils remain on the connecting rod, which not only ensures the purity of the shredded paper after shredding and the quality of paper recycling, but also avoids the metal coils splashing and injuring people during shredding, aggravating the wear of the shredding roller, and the tedious manual tearing of paper by the staff; on the other hand, starting the electric push rod can not only conveniently push down the multiple coils on the connecting rod for easy collection and subsequent processing, but also enable the arc-shaped brush plate to sweep and clean the anti-slip sleeve through the linkage action.

Description

Technical Field

[0001] The present invention relates to the technical field of waste paper processing, in particular to a safe paper shredder. Background Art

[0002] Paper shredders are often used to shred waste paper, newspapers, and books. Existing paper shredders primarily rely on two internal shredding rollers to shred waste paper, newspapers, and books. These rollers are driven by a drive unit and rotate in opposite directions. The shredded paper can be recycled.

[0003] However, some special waste books contain materials other than paper, such as loose-leaf books. Loose-leaf books are typically composed of a coil of paper and several sheets of paper attached to the coil. The coil is usually made of metal or plastic. When the loose-leaf book is shredded, the coil is also shredded, which can result in different components mixed into the shredded paper, thus reducing the quality of paper recycling. Furthermore, if the coil is made of metal, it is prone to splashing during shredding, affecting the safety of nearby workers. Furthermore, the higher hardness of the metal coil increases the wear rate of the shredding roller, significantly shortening its service life. If workers choose to tear off the sheets of paper from the coil, this process can be time-consuming and laborious for thick loose-leaf books. Summary of the Invention

[0004] The object of the present invention is to provide a safe paper shredder to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a safe paper shredder, comprising a shredder main body, a front outer surface of the shredder main body being provided with a paper feed chute, an inner wall of the paper feed chute being fixedly mounted on a conveyor, a side plate being fixedly mounted on the frame of the conveyor, the side walls of the side plates being symmetrically fixedly connected to a carrying plate front and back, the upper ends of the two carrying plates being commonly fixedly connected to two symmetrical concave plates, two concave frames symmetrical to each other front and back are provided between the two concave plates, an elastic component is provided between the concave frame located in the front and the front vertical walls of the two concave plates, an elastic component is provided between the concave frame located at the rear and the rear vertical walls of the two concave plates, a paper tearing mechanism is provided on both the concave frames, the side walls of the side plates being fixedly connected near the upper edges, a pushing mechanism is provided between the connecting rod and the side plates, and the center of the connecting rod corresponds to the center between the two concave frames;

[0006] The paper tearing mechanism includes a rotating shaft and a motor. The rotating shaft is rotatably connected between the inner side walls of the concave frame. The motor is fixedly installed on the side wall of the concave frame close to the side plate, and the output shaft of the motor movably passes through one side wall of the concave frame, and the output shaft end of the motor is fixedly connected to one end of the rotating shaft. The outer wall of the rotating shaft is fixedly sleeved with an anti-slip sleeve, and the anti-slip sleeve is made of nitrile rubber material.

[0007] Preferably, the elastic component includes two pulling columns, which are symmetrically fixedly connected to the front end of the concave frame located in the front, and the two pulling columns are respectively movable through the front vertical walls of the two concave plates, and springs three are slidably sleeved on the outer walls of the two pulling columns, and the two springs three are respectively fixedly connected between the front vertical walls of the two concave plates and the front end of the concave frame located in the front, the front ends of the two pulling columns are commonly fixedly connected to the concave plate, and a limiting mechanism is provided between the concave plate and the side walls of the side plates.

[0008] Preferably, the limiting mechanism includes a U-shaped plate, which is fixedly connected to the side wall of the side plate near the concave plate, and the U-shaped plate is located below the concave plate, and the upper end of the U-shaped plate is symmetrically slidably interspersed with a sliding column, and the lower ends of the two sliding columns are commonly fixedly connected to a pull plate, and the upper end of the pull plate is fitted with the lower end of the U-shaped plate, and the upper ends of the two sliding columns are commonly fixedly connected to a triangular plate, and the front end of the triangular plate is fitted with the lower edge of the rear end of the concave plate, and a spring two is symmetrically fixedly connected between the triangular plate and the U-shaped plate, and the two springs two are respectively slidably sleeved on the outer walls of the two sliding columns.

[0009] Preferably, the elastic component includes two hook-shaped tubes, which are fixedly inserted into the rear vertical walls of the two concave plates, and the inner walls of the two hook-shaped tubes are slidably provided with round blocks, and the rear ends of the two round blocks are respectively provided with connecting pieces between the upper two side edges of the rear end of the concave plates, and the front ends of the two round blocks are fixedly connected with splicing columns, and the front ends of the two splicing columns are fixedly connected to the rear end of the concave frame located at the rear, and the outer walls of the two splicing columns are slidably sleeved with springs four, and the two springs four are respectively fixedly connected between the rear end of the concave frame located at the rear and the ends of the two hook-shaped tubes.

[0010] Preferably, cylindrical grooves are respectively formed on the inner walls of the two hook-shaped tubes corresponding to the two round blocks, and the two cylindrical grooves are respectively slidably matched with the two round blocks.

[0011] Preferably, the connecting member includes a drawstring, which passes through the hook-shaped tube, and one end of the drawstring is fixedly connected to the upper edge of the rear end of the concave plate, and the other end of the drawstring is fixedly connected to the rear end of the round block.

[0012] Preferably, the pushing mechanism includes an electric push rod, which is fixedly mounted on the side wall of the side plate away from the connecting rod, and the telescopic shaft of the electric push rod is movable through the side plate, and the telescopic shaft end of the electric push rod is fixedly connected with a ring, and the ring is slidably sleeved on the outer wall of the connecting rod, and the top of the outer wall of the ring is symmetrically fixed with an L-shaped plate front and back.

[0013] Preferably, the pushing mechanism also includes two inclined plates, both of which are fixedly connected to the side walls of the side plates, and the two inclined plates are respectively located below the horizontal walls of the two L-shaped plates, and the ends of the two inclined plates away from the side plates are fixedly connected to the horizontal plates, and the two horizontal plates are respectively located directly above the two rotating shafts, and a dust scraping mechanism is provided between the two L-shaped plates and the two inclined plates.

[0014] Preferably, the dust scraping mechanism includes a connecting column, which is slidably inserted in the horizontal wall of the L-shaped plate, and the lower end of the connecting column is fixedly connected to a concave bracket, and the lower end of the concave bracket is fixedly connected to an arc-shaped brush plate, and the inclined plate is located between the concave bracket and the arc-shaped brush plate, and the upper edge of one side wall of the concave bracket is in contact with the upper inclined surface of the inclined plate, and a spring 1 is fixedly connected between the upper end of the concave bracket and the horizontal wall of the L-shaped plate, and the spring 1 is slidably sleeved on the outer wall of the connecting column, and the arc-shaped brush plate is located above the anti-slip sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This safe paper shredder can tear the paper sheets of loose-leaf books off the coils one by one, and send the torn papers into the main body of the shredder through the conveyor for shredding. The coils will be retained on the connecting rod to prevent the coils from being shredded together, thus ensuring that the shredded paper is free of coil components, thereby ensuring the quality of paper recycling.

[0017] 2. Avoiding the coil from being crushed together also avoids the metal coil from splashing during crushing, affecting nearby workers, and also avoids the high hardness metal coil from increasing the wear rate of the crushing roller, greatly shortening the service life of the crushing roller, and at the same time avoids the staff from manually tearing off several pieces of paper on the coil, saving time and effort.

[0018] 3. By starting the electric push rod, it is not only convenient to push down the multiple coils retained on the connecting rod, which is convenient for collecting and subsequently processing the coils, but the start of the electric push rod will drive the arc-shaped brush plate to sweep and clean the anti-slip sleeve through a series of linkage effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2is a cross-sectional view of the pulverizer body of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the side panel of the present invention;

[0022] Figure 4 It is a side view of the connecting rod, two rotating shafts and two arc-shaped brush plates of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the concave bracket and the inclined plate of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the limiting mechanism of the present invention;

[0025] Figure 7 A partial cross-sectional view of a hook-shaped tube of the present invention;

[0026] Figure 8 For the present invention Figure 7 A magnified view of the structure at center A.

[0027] In the accompanying drawings, the list of parts represented by each reference number is as follows: 1. Crusher body; 2. Paper feed chute; 3. Conveyor; 4. Side panel; 5. Electric push rod; 6. Carrying plate; 7. Concave plate; 8. Hook-shaped tube; 9. Concave frame; 10. Rotating shaft; 11. Anti-slip sleeve; 12. Pull column; 13. Concave plate; 14. U-shaped plate; 15. L-shaped plate; 16. Inclined plate; 17. Pull rope; 18. Connecting rod; 19. Ring; 20. Triangular plate; 21. Connecting column; 22. Concave bracket; 23. Arc-shaped brush plate; 24. Spring 1; 25. Sliding column; 26. Spring 2; 27. Pull plate; 28. Spring 3; 29. ​​Motor; 30. Round block; 31. Splicing column; 32. Column slot; 33. Spring 4; 34. Horizontal plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The present invention provides a technical solution: Figure 1 - Figure 8The safe paper shredder shown includes a shredder body 1, a paper feed slot 2 is opened on the front outer shell surface of the shredder body 1, a conveyor 3 is fixedly installed on the inner wall of the paper feed slot 2, a side panel 4 is fixedly installed on the frame of the conveyor 3, and the side walls of the side panels 4 are symmetrically fixedly connected with a carrier plate 6, and the upper ends of the two carrier plates 6 are fixedly connected with two symmetrical concave plates 7. Two concave frames 9 that are symmetrical to each other are provided between the two concave plates 7. An elastic component is provided between the front concave frame 9 and the front vertical walls of the two concave plates 7, and an elastic component is provided between the rear concave frame 9 and the rear vertical walls of the two concave plates 7. A paper tearing mechanism is provided on both concave frames 9. A connecting rod 18 is fixedly connected to the side wall of the side panel 4 near the upper edge, and a pushing mechanism is provided between the connecting rod 18 and the side panel 4, and the center of the connecting rod 18 corresponds to the center between the two concave frames 9.

[0030] The paper tearing mechanism includes a rotating shaft 10 and a motor 29. The rotating shaft 10 is rotatably connected between the inner side walls of the concave frame 9. The motor 29 is fixedly mounted on the side wall of the concave frame 9 close to the side plate 4, and the output shaft of the motor 29 movably passes through one side wall of the concave frame 9, and the output shaft end of the motor 29 is fixedly connected to one end of the rotating shaft 10. An anti-slip sleeve 11 is fixedly sleeved on the outer wall of the rotating shaft 10, and the anti-slip sleeve 11 is made of nitrile rubber material.

[0031] The elastic component includes two pull columns 12, which are symmetrically fixedly connected to the front end of the concave frame 9 located in the front, and the two pull columns 12 are movable through the front vertical walls of the two concave plates 7 respectively, and spring three 28 is slidably sleeved on the outer walls of the two pull columns 12. The two springs three 28 are respectively fixedly connected between the front vertical walls of the two concave plates 7 and the front end of the concave frame 9 located in the front, and the front ends of the two pull columns 12 are commonly fixedly connected to the concave plate 13, and a limiting mechanism is provided between the concave plate 13 and the side wall of the side plate 4.

[0032] The limiting mechanism includes a U-shaped plate 14, which is fixedly connected to the side wall of the side plate 4 near the concave plate 13, and the U-shaped plate 14 is located below the concave plate 13, and the upper end of the U-shaped plate 14 is symmetrically slidably interspersed with a sliding column 25, and the lower ends of the two sliding columns 25 are commonly fixedly connected to a pull plate 27, and the upper end of the pull plate 27 is fitted with the lower end of the U-shaped plate 14, and the upper ends of the two sliding columns 25 are commonly fixedly connected to a triangular plate 20, and the front end of the triangular plate 20 is fitted at the lower edge of the rear end of the concave plate 13, and a spring 26 is symmetrically fixedly connected between the triangular plate 20 and the U-shaped plate 14, and the two springs 26 are respectively slidably sleeved on the outer walls of the two sliding columns 25.

[0033] The elastic component includes two hook-shaped tubes 8, which are fixedly inserted into the rear vertical walls of the two concave plates 7, and the inner walls of the two hook-shaped tubes 8 are slidably provided with round blocks 30. The rear ends of the two round blocks 30 are respectively provided with connecting parts between the upper two side edges of the rear end of the concave plate 13, and the front ends of the two round blocks 30 are fixedly connected with splicing columns 31. The front ends of the two splicing columns 31 are fixedly connected to the rear end of the concave frame 9 located at the rear, and the outer walls of the two splicing columns 31 are slidably sleeved with springs four 33. The two springs four 33 are respectively fixedly connected between the rear end of the concave frame 9 located at the rear and the ends of the two hook-shaped tubes 8.

[0034] The inner walls of the two hook-shaped tubes 8 are respectively provided with cylindrical grooves 32 corresponding to the two round blocks 30 , and the two cylindrical grooves 32 are respectively slidably fitted with the two round blocks 30 .

[0035] The connecting member includes a drawstring 17 , which passes through the hook tube 8 , and one end of the drawstring 17 is fixedly connected to the upper edge of the rear end of the concave plate 13 , and the other end of the drawstring 17 is fixedly connected to the rear end of the round block 30 .

[0036] The pushing mechanism includes an electric push rod 5, which is fixedly mounted on the side wall of the side panel 4 away from the connecting rod 18, and the telescopic shaft of the electric push rod 5 is movable through the side panel 4, and the telescopic shaft end of the electric push rod 5 is fixedly connected with a collar 19, and the collar 19 is slidably mounted on the outer wall of the connecting rod 18, and the top of the outer wall of the collar 19 is symmetrically fixed with an L-shaped plate 15 in the front and back.

[0037] The pushing mechanism also includes two inclined plates 16, both of which are fixedly connected to the side walls of the side plates 4, and the two inclined plates 16 are respectively located below the horizontal walls of the two L-shaped plates 15, and the ends of the two inclined plates 16 away from the side plates 4 are fixedly connected to horizontal plates 34, and the two horizontal plates 34 are respectively located directly above the two rotating shafts 10, and dust scraping mechanisms are provided between the two L-shaped plates 15 and the two inclined plates 16.

[0038] The dust scraping mechanism includes a connecting column 21, which slides and is inserted into the horizontal wall of the L-shaped plate 15, and the lower end of the connecting column 21 is fixedly connected to a concave bracket 22, and the lower end of the concave bracket 22 is fixedly connected to an arc-shaped brush plate 23. The inclined plate 16 is located between the concave bracket 22 and the arc-shaped brush plate 23. The upper edge of one side wall of the concave bracket 22 is in contact with the upper inclined surface of the inclined plate 16, and a spring 24 is fixedly connected between the upper end of the concave bracket 22 and the horizontal wall of the L-shaped plate 15. The spring 24 is slidably sleeved on the outer wall of the connecting column 21, and the arc-shaped brush plate 23 is located above the anti-slip sleeve 11.

[0039] Working principle: When using this safe paper shredder to shred loose-leaf books, first insert the multiple coils on the loose-leaf book into the connecting rod 18. Under the action of gravity, the loose-leaf book as a whole is in a vertical downward state, and then pull the pull plate 27 downward. The pull plate 27 will drive the two slide posts 25 to slide downward in the inner wall of the U-shaped plate 14, and the two slide posts 25 will jointly drive the triangular plate 20 to move downward together (in this process, the two springs 26 between the triangular plate 20 and the U-shaped plate 14 will be squeezed on the outer walls of their respective slide posts 25). The triangular plate 20 will slide downward at the rear end of the concave plate 13 and leave the concave plate 13. At this time, the concave plate 13 loses the limiting effect of the triangular plate 20. Under the action of the two springs 3 28 (the two springs 3 28 will lengthen towards restoring their original length), a concave frame 9 located in the front will move backward, and the concave frame 9 will drive the two pull columns 12 to slide backward in the inner walls of their respective concave plates 7, and the two pull columns 12 will jointly drive the concave plate 13 to move backward. At the same time, the backward movement of the concave plate 13 will cause the two pull ropes 17 that were originally in a straight state to become loose, and the concave frame 9 located at the rear will move forward under the action of the two springs four 33 (the two springs four 33 will lengthen towards restoring their original lengths), and the concave frame 9 will drive the two splicing columns 31 to slide forward in their respective hook-shaped tubes 8 (in this process, the two splicing columns 31 will drive the round blocks 30 on them to slide forward in the cylindrical grooves 32 on their respective hook-shaped tubes 8), and the concave frame 9 will drive the rotating shaft 10 thereon to move forward. At this time, the loose-leaf book suspended on the connecting rod 18 is clamped between the anti-slip sleeves 11 on each of the two rotating shafts 10.

[0040] Then, the shredder body 1, the conveyor 3 on the paper feed chute 2, and the two motors 29 are sequentially activated. The two motors 29 drive their respective rotating shafts 10 to rotate, and the rotating shafts 10 drive their respective anti-slip sleeves 11 to rotate together. The single pages of the loose-leaf book clamped between the two anti-slip sleeves 11 are torn off the coils due to the friction of the anti-slip sleeves 11. As the two anti-slip sleeves 11 continue to rotate, all the pages in the loose-leaf book are torn off. (It should be noted that the loose-leaf book becomes thinner and thinner as the number of pages decreases, but this does not affect the tearing effect of the anti-slip sleeves 11. This is because the two anti-slip sleeves 11 will always clamp the loose-leaf book under the force of the two springs 3 28 and the two springs 4 33.) The gradually falling loose-leaf pages fall onto the conveyor belt of the conveyor 3 and enter the shredder body 1 through the paper feed chute 2 on the shredder body 1 to be shredded.

[0041] After the loose-leaf book is shredded, after closing the shredder body 1, the conveyor 3, and the two motors 29, the concave plate 13 is first pulled forward. The concave plate 13 will slide over the inclined surface of the triangular plate 20. The triangular plate 20 will automatically move downward due to the resistance of the concave plate 13. When the concave plate 13 is completely located at the front end of the triangular plate 20, the triangular plate 20 will automatically return to its original position under the action of the two springs 26. At this time, under the limiting action of the triangular plate 20, the concave plate 13 will maintain its initial fixed state. According to the principle mentioned above, the two rotating shafts 10 will also return to their initial state. The electric push rod 5 on the side plate 4 can then be activated. The telescopic shaft of the electric push rod 5 will extend outward, and the telescopic shaft of the electric push rod 5 will drive the ring 19 to slide on the outer wall of the connecting rod 18 away from the side plate 4. The ring 19 will push down the multiple coils left on the connecting rod 18 together, thereby facilitating the collection and subsequent processing of the multiple coils. At the same time, the collar 19 will drive the two L-shaped plates 15 thereon to move together in the direction away from the side plate 4, and one of the L-shaped plates 15 will drive the connecting column 21 thereon to move together in the direction away from the side plate 4, and the connecting column 21 will drive the concave bracket 22 to slide downward on the outer wall of the inclined plate 16 (in this process, the spring 24 between the L-shaped plate 15 and the concave bracket 22 will automatically tend to restore its original length on the outer wall of the connecting column 21). The concave bracket 22 will drive the arc-shaped brush plate 23 to move downward in the process of moving away from the side plate 4 until the bottom end of the concave bracket 22 When it fits with the upper end of the horizontal plate 34, the arc-shaped brush plate 23 will fit tightly on the corresponding anti-slip sleeve 11, and as the ring 19 continues to move away from the side plate 4, the stains on the outer surface of the anti-slip sleeve 11 will be swept away (the anti-slip sleeve 11 is prone to sticking to stains on the paper when tearing paper). Similarly, the movement of the other L-shaped plate 15 away from the side plate 4 will also cause the stains on the outer surface of the other anti-slip sleeve 11 to be swept away by the corresponding arc-shaped brush plate 23. Finally, as the telescopic shaft of the electric push rod 5 shrinks inward, the two arc-shaped brush plates 23 will also return to their initial state.

[0042] It should be noted that when the bristles of the two arc-shaped brush plates 23 are cleaning the outer surfaces of the two anti-slip sleeves 11 respectively, the two motors 29 can be started, and the two motors 29 can drive the respectively connected rotating shafts 10 and the anti-slip sleeves 11 to rotate, so that the bristles of the two arc-shaped brush plates 23 can comprehensively clean the outer surfaces of the two anti-slip sleeves 11.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A safe paper shredder, comprising a shredder body (1), characterized in that: The front outer shell surface of the pulverizer body (1) is provided with a paper feed slot (2), the inner wall of the paper feed slot (2) is fixedly mounted with a conveyor (3), the frame of the conveyor (3) is fixedly mounted with a side panel (4), the side wall of the side panel (4) is symmetrically fixedly connected to a carrier plate (6) in the front and rear directions, the upper ends of the two carrier plates (6) are fixedly connected to two symmetrical concave plates (7), and two concave frames (9) are provided between the two concave plates (7), and the front side of the side panel (4) is symmetrically fixedly connected to the carrier plate (6). An elastic component is provided between the concave frame (9) and the front vertical walls of the two concave plates (7), an elastic component is provided between the concave frame (9) located at the rear and the rear vertical walls of the two concave plates (7), both concave frames (9) are provided with a paper tearing mechanism, a connecting rod (18) is fixedly connected to the side wall of the side plate (4) near the upper edge, a pushing mechanism is provided between the connecting rod (18) and the side plate (4), and the center of the connecting rod (18) corresponds to the center between the two concave frames (9); The paper tearing mechanism comprises a rotating shaft (10) and a motor (29), wherein the rotating shaft (10) is rotatably connected between the inner side walls of the concave frame (9), the motor (29) is fixedly mounted on the side wall of the concave frame (9) close to the side plate (4), and the output shaft of the motor (29) movably passes through the side wall of the concave frame (9), and the output shaft end of the motor (29) is fixedly connected to one end of the rotating shaft (10), and an anti-slip sleeve (11) is fixedly provided on the outer wall of the rotating shaft (10), and the anti-slip sleeve (11) is made of nitrile rubber material.

2. The secure paper shredder according to claim 1, characterized in that: The elastic component includes two pull columns (12), the two pull columns (12) are symmetrically fixedly connected to the front end of the concave frame (9) located in the front, and the two pull columns (12) are respectively movable through the front vertical walls of the two concave plates (7), and spring three (28) is slidably sleeved on the outer walls of the two pull columns (12), the two spring threes (28) are respectively fixedly connected between the front vertical walls of the two concave plates (7) and the front end of the concave frame (9) located in the front, the front ends of the two pull columns (12) are commonly fixedly connected to the concave plate (13), and a limiting mechanism is provided between the concave plate (13) and the side wall of the side plate (4).

3. The secure paper shredder according to claim 2, characterized in that: The limiting mechanism includes a U-shaped plate (14), the U-shaped plate (14) is fixedly connected to the side wall of the side plate (4) near the concave plate (13), and the U-shaped plate (14) is located below the concave plate (13), and the upper end of the U-shaped plate (14) is symmetrically slidably interspersed with a sliding column (25), the lower ends of the two sliding columns (25) are fixedly connected to a pull plate (27), the upper end of the pull plate (27) is fitted with the lower end of the U-shaped plate (14), the upper ends of the two sliding columns (25) are fixedly connected to a triangular plate (20), the front end of the triangular plate (20) is fitted at the lower edge of the rear end of the concave plate (13), and a spring 2 (26) is symmetrically fixedly connected between the triangular plate (20) and the U-shaped plate (14), and the two springs 2 (26) are respectively slidably sleeved on the outer walls of the two sliding columns (25).

4. The secure paper shredder according to claim 2, characterized in that: The elastic component comprises two hook-shaped tubes (8), the two hook-shaped tubes (8) are fixedly inserted into the rear vertical walls of the two concave plates (7), and the inner walls of the two hook-shaped tubes (8) are slidably provided with round blocks (30), the rear ends of the two round blocks (30) are respectively provided with connecting pieces between the upper two side edges of the rear end of the concave plate (13), and the front ends of the two round blocks (30) are fixedly connected with splicing columns (31), the front ends of the two splicing columns (31) are fixedly connected to the rear end of the concave frame (9) located at the rear, and the outer walls of the two splicing columns (31) are slidably provided with springs four (33), and the two springs four (33) are respectively fixedly connected between the rear end of the concave frame (9) located at the rear and the ends of the two hook-shaped tubes (8).

5. The secure paper shredder according to claim 4, characterized in that: The inner walls of the two hook-shaped tubes (8) are respectively provided with cylindrical grooves (32) corresponding to the two round blocks (30), and the two cylindrical grooves (32) are respectively slidably matched with the two round blocks (30).

6. The secure paper shredder according to claim 4, characterized in that: The connecting member comprises a drawstring (17), the drawstring (17) passing through the hook-shaped tube (8), one end of the drawstring (17) being fixedly connected to the upper edge of the rear end of the concave plate (13), and the other end of the drawstring (17) being fixedly connected to the rear end of the round block (30).

7. The secure paper shredder according to claim 1, characterized in that: The pushing mechanism includes an electric push rod (5), which is fixedly mounted on a side wall of the side plate (4) away from the connecting rod (18), and a telescopic shaft of the electric push rod (5) movably passes through the side plate (4), and a sleeve (19) is fixedly connected to the end of the telescopic shaft of the electric push rod (5), and the sleeve (19) is slidably sleeved on the outer wall of the connecting rod (18), and an L-shaped plate (15) is fixedly connected to the top of the outer wall of the sleeve (19) in a front-to-back symmetrical manner.

8. The secure paper shredder according to claim 7, characterized in that: The pushing mechanism further comprises two inclined plates (16), both of which are fixedly connected to the side walls of the side plates (4), and the two inclined plates (16) are respectively located below the horizontal walls of the two L-shaped plates (15), and one end of the two inclined plates (16) away from the side plates (4) is fixedly connected to a horizontal plate (34), and the two horizontal plates (34) are respectively located directly above the two rotating shafts (10), and a dust scraping mechanism is provided between the two L-shaped plates (15) and the two inclined plates (16).

9. The secure paper shredder according to claim 8, characterized in that: The dust scraping mechanism includes a connecting column (21), the connecting column (21) is slidably inserted into the horizontal wall of the L-shaped plate (15), and the lower end of the connecting column (21) is fixedly connected to a concave bracket (22), the lower end of the concave bracket (22) is fixedly connected to an arc-shaped brush plate (23), the inclined plate (16) is located between the concave bracket (22) and the arc-shaped brush plate (23), the upper edge of one side wall of the concave bracket (22) is in contact with the upper inclined surface of the inclined plate (16), and a spring (24) is fixedly connected between the upper end of the concave bracket (22) and the horizontal wall of the L-shaped plate (15), the spring (24) is slidably sleeved on the outer wall of the connecting column (21), and the arc-shaped brush plate (23) is located above the anti-slip sleeve (11).

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