Safe paper shredder

Abstract

The invention relates to the technical field of waste paper treatment, in particular to a safe paper shredder which comprises a shredder body, a paper feeding groove is formed in the front shell face of the shredder body, a conveyor is fixedly installed on the inner wall of the paper feeding groove, a side plate is fixedly installed on a rack of the conveyor, and carrying plates are fixedly connected to the side wall of the side plate in a front-back symmetry mode. The safe paper shredder can automatically tear off paper of a loose-leaf notebook from the coil one by one, the paper is fed into the shredder main body to be shredded by means of the conveyor, and the coil is reserved on the connecting rod, so that the purity of shredded paper is ensured, the paper recovery quality is ensured, and the production efficiency is improved. The metal coil is prevented from splashing to hurt people, aggravated abrasion of a crushing roller and tedious manual paper tearing of workers during crushing; and on the other hand, the electric push rod is started, the coils on the connecting rod can be conveniently pushed down, collection and follow-up treatment are facilitated, and the arc-shaped brush plate can sweep and clean the anti-skid sleeve through the linkage effect.

Description

Technical Field

[0001] The 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, waste newspapers, waste books, etc. Existing paper shredders mainly rely on two shredding rollers inside to shred waste paper, waste newspapers, waste books, etc. The two shredding rollers are driven by a driving device to rotate in opposite directions. The shredded paper can be recycled.

[0003] However, some special waste books may contain materials other than paper, such as loose-leaf books. Loose-leaf books are usually composed of a coil and several sheets of paper sleeved outside the coil. The coil is usually made of metal or plastic. When the loose-leaf book is shredded, the coil will also be shredded, which will cause different components to be mixed in the shredded paper, thereby reducing the quality of paper recycling. At the same time, if the coil is made of metal, the metal coil is prone to splashing during shredding, affecting the safety of nearby workers. The coil of the loose-leaf book, and the higher hardness of the metal coil will increase the wear rate of the shredding roller, greatly shortening the service life of the shredding roller. If the staff chooses to tear off several sheets of paper on the coil, it will 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 purpose, the present invention provides the following technical solutions: a safe paper shredder, comprising a shredder body, a front outer shell surface of the shredder body is provided with a paper feed slot, an inner wall of the paper feed slot is fixedly installed with a conveyor, a side panel is fixedly installed on the frame of the conveyor, the side walls of the side panels are symmetrically fixedly connected with a carrier plate front and back, two symmetrical concave plates are fixedly connected to the upper ends of the two carrier 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 in the rear and the rear vertical walls of the two concave plates, paper tearing mechanisms are provided on the two concave frames, a connecting rod is fixedly connected with the side wall of the side panel near the upper edge, a pushing mechanism is provided between the connecting rod and the side panel, and the center of the connecting rod corresponds to the center between the two concave frames.

[0006] Preferably, the elastic component includes two pulling columns, the two pulling columns are symmetrically fixedly connected to the front end of the concave frame located in the front, and the two pulling columns are respectively movably inserted into the front vertical walls of the two concave plates, and springs three are slidably sleeved on the outer walls of the two pulling columns, 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.

[0007] 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 sliding columns, 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 at the lower edge of the rear end of the concave plate, and two springs are symmetrically fixedly connected between the triangular plate and the U-shaped plate, and the two springs are respectively slidably mounted on the outer walls of the two sliding columns.

[0008] Preferably, the elastic component includes two hook-shaped tubes, which are respectively fixedly inserted in 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.

[0009] Preferably, cylindrical grooves are provided on the inner walls of the two hook-shaped tubes respectively corresponding to the two round blocks, and the two cylindrical grooves are respectively slidably matched with the two round blocks.

[0010] Preferably, the connecting member comprises a drawstring, the drawstring passes through the hook-shaped tube, 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.

[0011] Preferably, 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 mounted 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, and an anti-slip sleeve is fixedly provided on the outer wall of the rotating shaft, and the anti-slip sleeve is made of nitrile rubber material.

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

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

[0014] Preferably, the 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, the inclined plate is located between the concave bracket and the arc-shaped brush plate, 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 is fixedly connected between the upper end of the concave bracket and the horizontal wall of the L-shaped plate, the spring 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: 1. This safe shredder can tear the loose-leaf pages from the coils one by one, and send the torn pages into the main body of the shredder through a conveyor for shredding. The coils will be retained on the connecting rod to prevent the coils from being shredded together, thereby ensuring that the shredded paper is free of coil components, thereby ensuring the quality of paper recycling.

[0016] 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 aggravating the wear rate of the crushing roller, greatly shortening the service life of the crushing roller. At the same time, it avoids the staff from manually tearing off several sheets of paper on the coil, saving time and effort.

[0017] 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

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of a pulverizer body of the present invention; Figure 3It is a structural schematic diagram of the side plate of the present invention; Figure 4 It is a side view of the connecting rod, two rotating shafts and two arc-shaped brush plates of the present invention; Figure 5 It is a structural schematic diagram of the concave bracket and the inclined plate of the present invention; Figure 6 It is a structural schematic diagram of the limiting mechanism of the present invention; Figure 7 A partial cross-sectional view of a hook-shaped tube of the present invention; Figure 8 For the present invention Figure 7 A magnified view of the structure in the middle.

[0019] In the attached drawings, the parts represented by each reference numeral are listed as follows: 1. Crusher body; 2. Paper feed trough; 3. Conveyor; 4. Side plate; 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 brush plate; 24. Spring one; 25. Sliding column; 26. Spring two; 27. Pull plate; 28. Spring three; 29. ​​Motor; 30. Round block; 31. Splicing column; 32. Column slot; 33. Spring four; 34. Horizontal plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0021] The present invention provides a technical solution: Figure 1 - Figure 8A safe paper shredder is shown, comprising a shredder body 1, a paper feed slot 2 is provided 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, a carrier plate 6 is fixedly connected to the side wall of the side panel 4 symmetrically in the front and back, two symmetrical concave plates 7 are fixedly connected to the upper ends of the two carrier plates 6, two concave frames 9 symmetrical to each other in the front and back are provided between the two concave plates 7, an elastic component is provided between the concave frame 9 located in the front and the front vertical walls of the two concave plates 7, an elastic component is provided between the concave frame 9 located in the rear 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, 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.

[0022] 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 respectively movable through the front vertical walls of the two concave plates 7, and springs three 28 are 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 with a concave plate 13, and a limiting mechanism is provided between the concave plate 13 and the side wall of the side plate 4.

[0023] 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 with a pull plate 27, and the upper ends of the pull plate 27 are 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 with 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 springs 26 are 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.

[0024] 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, and 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, and 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, 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.

[0025] 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 .

[0026] The connecting member includes a drawstring 17 , which passes through the hook-shaped 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 .

[0027] 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 installed 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 provided on the outer wall of the rotating shaft 10, and the anti-slip sleeve 11 is made of nitrile rubber material.

[0028] The pushing mechanism includes an electric push rod 5, which is fixedly mounted on the side plate 4 away from the side wall of the connecting rod 18, and the telescopic shaft of the electric push rod 5 movably passes through the side plate 4, and the telescopic shaft end of the electric push rod 5 is fixedly connected with a ring 19, and the ring 19 is slidably mounted on the outer wall of the connecting rod 18, and the top of the outer wall of the ring 19 is symmetrically fixedly connected with an L-shaped plate 15 front and back.

[0029] The pushing mechanism also includes two inclined plates 16, 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.

[0030] The dust scraping mechanism includes a connecting column 21, which 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, 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.

[0031] Working principle: When using this safety shredder to shred a loose-leaf book, 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 corresponding 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, and under the action of the two springs 3 28 (the two springs 3 28 will lengthen towards the original length), a concave frame 9 located in the front will move backward, and the concave frame 9 will drive the two pulling columns 12 to slide backward in the inner walls of their respective concave plates 7, and the two pulling 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 change into a loose state, 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 columnar 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.

[0032] Then, the pulverizer body 1, the conveyor 3 on the paper feed slot 2, and the two motors 29 are started in sequence. The two motors 29 will drive the respective rotating shafts 10 to rotate, and the rotating shafts 10 will drive the respective anti-skid sleeves 11 to rotate together, and the single-leaf paper of the loose-leaf book clamped between the two anti-skid sleeves 11 can be torn off from the coil due to the friction of the anti-skid sleeves 11. As the two anti-skid sleeves 11 continue to rotate, all the paper on the loose-leaf book can be torn off (it should be noted that the paper of the loose-leaf book will become thinner and thinner as the number of papers decreases, but this does not affect the tearing effect of the anti-skid sleeves 11, because under the action of the two springs three 28 and the two springs four 33, the two anti-skid sleeves 11 will always clamp the loose-leaf book). The gradually falling loose-leaf paper will fall onto the conveyor belt of the conveyor 3 and enter the inside of the pulverizer body 1 through the paper feed slot 2 on the pulverizer body 1 for pulverization.

[0033] When the loose-leaf book is shredded, after closing the shredder body 1, the conveyor 3 and the two motors 29, first pull the concave plate 13 forward, the concave plate 13 will slide over the inclined surface of the triangular plate 20, and the triangular plate 20 will automatically move down 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 reset 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 the initial fixed state. According to the principle mentioned above, the two rotating shafts 10 will also return to the initial state. Then the electric push rod 5 on the side plate 4 can be started, and 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 in the direction away from the side plate 4. The ring 19 will push down the remaining multiple coils on the connecting rod 18 together, so as to facilitate the collection and subsequent processing of 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, 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 gradually tend to restore the original length state on the outer wall of the connecting column 21), and 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 is in contact with the upper end of the horizontal plate 34, the arc-shaped brush plate 23 will be tightly fitted 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 brushed away (the anti-slip sleeve 11 is prone to sticking to stains on the paper when tearing the 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 brushed 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.

[0034] 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 completely clean the outer surfaces of the two anti-slip sleeves 11.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present 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 and fixedly connected with a carrier plate (6), the upper ends of the two carrier plates (6) are commonly and fixedly connected with two symmetrical concave plates (7), two concave frames (9) symmetrically and frontally are arranged between the two concave plates (7), and the front side of the side panel (4) is provided with a paper feed slot (2), the side wall of the side panel (4) is symmetrically and fixedly connected with a carrier plate (6), the upper ends of the two carrier plates (6) are commonly and fixedly connected with two symmetrical concave plates (7), the two concave frames (9) located in the front 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).

2. A secure paper shredder according to claim 1, characterized in that: The elastic component comprises 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 movably penetrated through the front vertical walls of the two concave plates (7), and springs three (28) are 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, 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. A secure paper shredder according to claim 2, characterized in that: The limiting mechanism comprises a U-shaped plate (14), wherein 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 a sliding column (25) is symmetrically slidably inserted through the upper end of the U-shaped plate (14), and the lower ends of the two sliding columns (25) are commonly fixedly connected to a pulling plate (27), and the upper ends of the pulling plates (27) are in contact with the lower ends 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 in contact with the lower edge of the rear end of the concave plate (13), and a second spring (26) is symmetrically fixedly connected between the triangular plate (20) and the U-shaped plate (14), and the two second springs (26) are respectively slidably sleeved on the outer walls of the two sliding columns (25).

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

6. A 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 paper tearing mechanism comprises a rotating shaft (10) and a motor (29); the rotating shaft (10) is rotatably connected between two inner side walls of the concave frame (9); the motor (29) is fixedly mounted on a side wall of the concave frame (9) close to the side plate (4); an output shaft of the motor (29) movably penetrates one side wall of the concave frame (9); an 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 provided on the outer wall of the rotating shaft (10); the anti-slip sleeve (11) is made of nitrile rubber material.

8. The secure paper shredder according to claim 1, characterized in that: The pushing mechanism comprises an electric push rod (5), the electric push rod (5) being fixedly mounted on a side wall of a side plate (4) away from a 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), the sleeve (19) being slidably sleeved on an 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) symmetrically in front and back.

9. A secure paper shredder according to claim 8, characterized in that: The pushing mechanism further comprises two inclined plates (16), the two inclined plates (16) being fixedly connected to the side walls of the side plates (4), and the two inclined plates (16) being 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) being fixedly connected to the horizontal plates (34), the two horizontal plates (34) being respectively located directly above the two rotating shafts (10), and dust scraping mechanisms being respectively provided between the two L-shaped plates (15) and the two inclined plates (16).

10. A secure paper shredder according to claim 9, characterized in that: The dust scraping mechanism comprises 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), 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 a side wall of the concave bracket (22) is in contact with the upper inclined surface of the inclined plate (16), and a spring 1 (24) is fixedly connected between the upper end of the concave bracket (22) and the horizontal wall of the L-shaped plate (15), and the spring 1 (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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