Paper shredder core with high safety and paper shredder

Abstract

The utility model relates to a high security paper shredder core and paper shredder, including frame body, cutter shaft subassembly, press-down subassembly, machine cover, cutter shaft subassembly rotatingly set up in frame body, and cutter shaft subassembly upper part forms the paper cavity, frame body top end one side is rotatingly set up the machine cover, the machine cover is provided with the paper inlet and the movable press-down subassembly, the press-down subassembly is provided with the press-down subassembly, the press-down subassembly is provided with the press-down subassembly, and the press-down subassembly is provided with the press-down subassembly. Sliding grooves used for limiting the sliding track of the downward pressing assembly are formed in the two sides of the frame body so that the downward pressing assembly can be arranged above the cutter shaft assembly when the machine cover is closed. And a movable cover plate assembly is arranged in the frame body, so that the cover plate assembly is arranged above the cutter shaft assembly when the machine cover is opened. Through the arrangement of the downward pressing assembly and the paper placing cavity, a plurality of pieces of paper can be conveniently placed at a time, multiple times of paper placing are not needed, or paper which is large in size and cannot enter through the paper inlet can be directly placed into the paper placing cavity to be processed; and through the arrangement of the cover plate assembly, the cutter shaft assembly is shielded when the machine cover is opened, and limbs are prevented from being scratched by the cutter shaft assembly when paper is placed.

Description

Technical Field

[0001] This utility model relates to the field of paper shredder technology, and in particular to a highly safe paper shredder mechanism and paper shredder. Background Technology

[0002] Paper shredders are a common office equipment with a wide range of applications. They can be used to shred paper, CDs, and other materials to prevent the leakage of important information.

[0003] Existing automatic paper shredders include a chassis, a core, and a pressure cap assembly. The core is fixedly mounted on the top of the chassis. The pressure cap assembly includes a frame, a cover, an inner housing, and a pressing assembly. The tail end of the cover is hinged to the frame. The frame is fixedly mounted on the top of the chassis. The top of the inner housing is fixedly connected to the frame, and the bottom end of the inner housing is positioned above the core. The pressing assembly includes a pressure shaft and connecting rods at both ends of the pressure shaft. Connecting posts are provided at both ends of the pressure shaft. An elongated hole is vertically provided at the bottom end of the connecting rod. The connecting posts slide within the elongated holes of the corresponding connecting rods. Sliding grooves are provided on both sides of the middle section of the inner housing to facilitate the sliding of the connecting posts. The top ends of the connecting rods are hinged to both sides of the cover, so that when the cover is opened, the pressure shaft can be raised via the connecting rods, allowing paper to enter the core through the inner housing. When the cover is closed, the pressure shaft descends to press the paper inside the inner housing.

[0004] Based on this, an improved shredder cover includes a frame, a cover, an inner housing, and a pressing assembly. A rotatable left and right blade shaft are located below the inner housing, and multiple sets of annular blades with blade tips are fitted onto the left and right blade shafts. A paper feed slot is provided at the top of the cover for shredding without opening the cover. The pressing assembly includes a left and right pressure shaft symmetrically arranged above the left and right blade shafts, with the axes of the left and right pressure shafts aligned with the axes of the left and right blade shafts. When the pressing assembly descends to its limit position, the left pressure shaft is tangent to the blade tips of the annular blades on the left blade shaft, and the right pressure shaft is tangent to the blade tips of the annular blades on the right blade shaft; this is to prevent excessive cutting or collision between the left and right pressure shafts and the blade tips.

[0005] When the paper shredder constructed with the above technical solution is in the open position for paper feeding, the blade assembly is unprotected, which poses a significant safety hazard. Utility Model Content

[0006] The technical problem to be solved by this utility model is to design a paper shredder that can safely shred single sheets of paper, multiple sheets of paper, or large sheets of paper on the same shredder, thereby improving the safety of existing paper shredders.

[0007] To solve the above-mentioned technical problems, this utility model provides a highly safe paper shredder core, including a frame, a blade shaft assembly, a pressing assembly, and a cover. The blade shaft assembly is rotatably mounted in the frame, and a paper feeding cavity is formed above the blade shaft assembly. The cover is rotatably mounted on one side of the top of the frame. The cover is provided with a paper inlet and a movable pressing assembly. The two sides of the frame are provided with grooves to limit the sliding trajectory of the pressing assembly, so that the pressing assembly is positioned above the blade shaft assembly when the cover is closed. A movable cover plate assembly is provided in the frame, so that the cover plate assembly is positioned above the blade shaft assembly when the cover is open.

[0008] Furthermore, the cover plate assembly includes a left cover plate and a right cover plate that are arranged in opposite directions. A second micro switch is provided between the left cover plate and the right cover plate so that when the left cover plate and the right cover plate move and approach each other to a preset position, the second micro switch is triggered, the left cover plate and the right cover plate stop moving, and a cover plate opening is formed between the left cover plate and the right cover plate.

[0009] Furthermore, the cover plate assembly also includes a drive assembly for driving the left and right cover plates to move in opposite directions; the drive assembly includes a drive motor, a first gear for driving the left cover plate to move, a second gear for driving the right cover plate to move, and a third gear, wherein the first gear meshes with the left cover plate; the second gear meshes with the third gear, and the third gear meshes with the right cover plate; the drive motor is connected to the first and second gears via a conveyor belt so that the first and third gears rotate synchronously in opposite directions.

[0010] Furthermore, a first gear is provided on each side of the left cover plate, and rectangular grooves that mesh with the first gears are provided on both sides of the left cover plate. A third gear is provided on each side of the right cover plate, and rectangular grooves that mesh with the third gears are provided on both sides of the right cover plate. The two first gears and the two third gears are respectively driven by a transmission shaft, so that the two sides of the left and right cover plates are simultaneously driven by gears.

[0011] Furthermore, the cover plate assembly also includes a guide rail assembly disposed on the frame, wherein the left cover plate and the right cover plate are slidably engaged with the guide rail assembly to facilitate the movement of the left cover plate and the right cover plate.

[0012] Furthermore, the cover plate assembly also includes a first micro switch, which is located on the outside of the left or right cover plate, so that when the left or right cover plate moves away from each other to a preset position, the first micro switch is triggered and the left or right cover plate stops moving.

[0013] Furthermore, the slide includes an inclined groove and a longitudinal groove that are interconnected. When the pressing component moves to the bottom end of the longitudinal groove, the pressing component is tangentially positioned to the tip of the cutter shaft assembly, thereby limiting the extreme position of the pressing component.

[0014] Furthermore, the guide rail assembly includes an upper stop and a lower stop, and a sliding gap is formed between the upper stop and the lower stop to facilitate the sliding of the left cover plate and the right cover plate, so that the left cover plate and the right cover plate slide along the sliding gap.

[0015] Furthermore, the pressing assembly includes two symmetrically arranged pressing rollers, with pressing blocks respectively arranged below the two pressing rollers, and an arc-shaped groove arranged below each pressing block.

[0016] Furthermore, the pressing assembly includes a pressing bracket, a paper feed slot is provided in the middle of the pressing bracket, inclined pressing plates are provided on both sides of the pressing bracket, and the bottom end of the pressing plate forms a tangent portion.

[0017] Furthermore, the lower end of the pressure plate is provided with a bent portion, and the bent portion transitions to the tangent portion.

[0018] Furthermore, the pressing assembly includes a pressing bracket, a bracket paper feed groove is provided in the middle of the pressing bracket, a first pressure roller is provided on each side of the pressing bracket, and a second pressure roller is provided on each side of the bracket paper feed groove below the pressing bracket. The two ends of the second pressure roller are rotatably connected to the mounting base, and a paper feed groove is formed between the two second pressure rollers. The paper feed groove is located below the bracket paper feed groove.

[0019] A paper shredder that uses the aforementioned high-safety paper shredder mechanism.

[0020] The above-mentioned method of using the paper shredder includes the following steps:

[0021] S1. When shredding a single sheet or a small amount of paper, the machine cover is closed, while the left and right cover plates are open. The paper enters through the paper inlet, passes through the paper feeding cavity and the cover plate assembly, and then enters the blade shaft assembly for shredding.

[0022] S2. When multiple sheets of paper need to be shredded, open the machine cover. At this time, the drive motor starts, causing the left and right cover plates to move closer to each other until the second micro switch is triggered. The drive motor stops, and the left and right cover plates stop moving and are in the closed state. Put the paper directly into the paper feeding chamber and close the machine cover. At this time, the drive motor starts again, causing the left and right cover plates to move away from each other until the first micro switch is triggered. The drive motor stops, and the left and right cover plates stop moving and are in the open state. Start the main motor to open the cutter shaft assembly to shred the paper.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] The design of the pressing component and the paper feeding cavity makes it easy to feed a large number of sheets of paper at once, eliminating the need for multiple paper feedings. Alternatively, for larger sheets of paper that cannot be fed through the paper inlet, they can be directly placed into the paper feeding cavity for processing.

[0025] The cover assembly is designed to shield the knife shaft assembly when the cover is opened, thus preventing the knife shaft assembly from scratching the body when paper is being fed.

[0026] By using the counter-rotation of the first and third gears, the left and right cover plates can be easily controlled to move away from or closer to each other, thus realizing the opening and closing function;

[0027] The first and second microswitches effectively limit the movement of the left and right cover plates, enabling precise control.

[0028] The inclined groove and the longitudinal groove are designed so that when the pressing component moves to the bottom of the longitudinal groove, the pressing component is tangent to the blade tip of the blade shaft assembly, ensuring that all the paper entering the paper feeding cavity can be smoothly crushed, avoiding paper residue and incomplete crushing. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings:

[0030] Figure 1 This is a three-dimensional structural diagram of the movement in the first embodiment of the present invention;

[0031] Figure 2 This is a side view of the movement in the first embodiment of the present invention;

[0032] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0033] Figure 4 This is a three-dimensional structural diagram of the rear cover assembly of the mechanism removal tool shaft assembly in the open state in the first embodiment of this utility model;

[0034] Figure 5 This is a three-dimensional structural diagram of the closed state of the rear cover plate assembly of the mechanism removal tool shaft assembly in the first embodiment of this utility model;

[0035] Figure 6 This is an exploded structural diagram of the cover plate assembly in the first embodiment of the present utility model;

[0036] Figure 7 This is an exploded structural diagram of the guide rail assembly in the first embodiment of the present invention;

[0037] Figure 8 This is a three-dimensional structural diagram of the left cover plate in the first embodiment of the present utility model;

[0038] Figure 9 This is a three-dimensional structural diagram of the drive shaft;

[0039] Figure 10This is a three-dimensional structural diagram of the first micro switch;

[0040] Figure 11 This is a three-dimensional structural diagram of the cover plate assembly of the paper shredder in the closed state according to the second embodiment of the present invention;

[0041] Figure 12 This is a three-dimensional structural diagram of the shredder cover assembly in the open state in the second embodiment of the present utility model;

[0042] Figure 13 This is a three-dimensional structural diagram of the pressing component in Embodiment 3 of this utility model;

[0043] Figure 14 This is a three-dimensional structural diagram of the pressing component in Embodiment 4 of this utility model;

[0044] Figure 15 for Figure 14 A magnified view of a portion of region B in the middle;

[0045] Figure 16 This is a three-dimensional structural diagram of the pressing component in Embodiment 5 of this utility model;

[0046] Figure 17 for Figure 16 A magnified view of a portion of region C in the middle;

[0047] Figure 18 This is a three-dimensional structural diagram of the pressing component in Embodiment 6 of this utility model;

[0048] In the diagram: 10. Frame; 101. Support housing; 102. First inductive switch; 11. Slide groove; 111. Inclined groove; 112. Longitudinal groove; 20. Cutter shaft assembly; 21. Main motor; 22. Left cutter shaft; 23. Right cutter shaft; 221. Bearing; 30. Cover plate assembly; 31. Left cover plate; 32. Right cover plate; 33. Cover plate opening; 34. First micro switch; 5. Second micro switch; 321. Rectangular groove; 341. Contact rod; 41. Drive motor; 42. Conveyor belt; 43. First gear; 44. Second gear; 45. 46. ​​Third gear; 51. Drive shaft; 52. First baffle; 53. Lower baffle; 54. First baffle; 55. Second baffle; 60. Machine housing; 70. Machine cover; 71. Paper inlet; 72. Second inductive switch; 80. Pressing assembly; 801. Mounting base; 802. Sliding shaft; 803. Paper feed tray; 81. Lower pressure roller; 82. Lower pressure block; 821. Arc groove; 83. Lower pressure bracket; 831. Bracket paper feed tray; 84. Lower pressure plate; 841. Tangent part; 842. Bending part; 85. First pressure roller; 86. Second pressure roller. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0050] Please see Figures 1-10 A high-safety paper shredder core includes a frame 10, a cutter shaft assembly 20, a pressing assembly 80, and a cover 70.

[0051] The cutter shaft assembly 20 is rotatably mounted inside the frame 10. The cutter shaft assembly 20 includes a rotatable left cutter shaft 22 and a right cutter shaft 23. Multiple sets of annular blades with blade tips are fitted on the left cutter shaft 22 and the right cutter shaft 23 for rotating and shredding paper. Bearing holes are provided on both sides of the lower part of the frame 10. The two ends of the left cutter shaft 22 and the right cutter shaft 23 are rotatably engaged with the frame 10 via bearings 221. The left cutter shaft 22 and the right cutter shaft 23 are controlled to rotate by the main motor 21.

[0052] The frame 10 has grooves 11 on both sides to limit the sliding trajectory of the pressing component 80. The grooves 11 are composed of an inclined groove 111 and a longitudinal groove 112. The inclined groove 111 is inclined relative to the horizontal plane to limit the running trajectory of the pressure shaft seat. The longitudinal groove 112 is arranged vertically relative to the horizontal plane to limit the pressing component 80 to the extreme positions symmetrically arranged above the left and right cutter shafts, and to ensure that the pressing component 80 moves vertically up and down.

[0053] A cover 70 is rotatably mounted on one side of the top of the frame 10. The cover 70 is provided with a paper inlet 71 and a movable pressing assembly 80. The pressing assembly 80 includes a left pressing shaft and a right pressing shaft arranged symmetrically. Mounting seats are provided at both ends of the left pressing shaft. Similarly, both ends of the right pressing shaft are also connected to the mounting seats. A paper feed groove is formed between the left and right pressing shafts. The left and right pressing shafts are rotatably connected to the mounting seats. Sliding shafts are provided on the two mounting seats. The pressing assembly 80 also includes two pressing shaft connecting rods. The top ends of the two pressing shaft connecting rods are rotatably mounted on the cover 70. An elongated hole is provided at the bottom end of each pressing shaft connecting rod. The sliding shaft passes through the elongated hole and slides with the slide groove 11.

[0054] When the pressing assembly 80 descends to its limit position, the paper inlet 71 is positioned directly above the paper feed slot, facilitating the paper to pass through the paper inlet and paper feed slot into the space between the left blade shaft 22 and the right blade shaft 23. The left pressing shaft is tangent to the tip of the blade on the annular blade on the left blade shaft 22, and the right pressing shaft is tangent to the tip of the blade on the annular blade on the right blade shaft 23. This is to prevent the left and right pressing shafts from colliding with the blade tips.

[0055] The working process is as follows: when the cover 70 is closed, the left and right pressure shafts slide down along the elongated hole under the action of gravity, and at the same time move down to the lowest position along the inclined groove 111 into the longitudinal groove 112. The cover 70 is completely closed, and the left and right pressure shafts are supported by the paper. When there is paper in the frame 10 and the paper is being shredded, the pressure shaft seat moves down gradually along the elongated hole until the lowest position is the limit position. At this time, the paper is cleaned up, and the left pressure shaft is tangent to the tip of the ring blade on the left cutter shaft, and the right pressure shaft is tangent to the tip of the ring blade on the right cutter shaft.

[0056] A support housing 101 is provided inside the frame 10. The bottom of the support housing 101 is curved to form a paper feeding cavity, which facilitates the insertion of a whole sheet of paper. A second inductive switch 72 electrically connected to the main motor 21 is provided at the paper inlet 71 of the cover 70. When the cover 70 is closed and paper enters the paper inlet 71, the second inductive switch 72 is blocked. The second inductive switch 72 transmits a start signal to the main motor 21, which drives the cutter shaft assembly 20 to start and perform paper shredding.

[0057] A first inductive switch 102 electrically connected to the main motor 21 is provided on the support housing 101. When the paper is placed in the paper feeding cavity and blocks the first inductive switch 102 and the machine cover 70 is closed, the pressing component 80 presses down the paper, and the first inductive switch 102 transmits the start signal to the main motor 21, which drives the cutter shaft assembly 20 to start and perform paper shredding.

[0058] A movable cover assembly 30 is provided inside the frame 10 so that when the cover 70 is opened, the cover assembly 30 is positioned above the cutter shaft assembly 20.

[0059] The cover plate assembly 30 includes a left cover plate 31 and a right cover plate 32 that can be moved in opposite directions, and also includes a drive assembly for driving the left cover plate 31 and the right cover plate 32 to move in opposite directions, and a guide rail assembly disposed on the frame 10. The left cover plate 31 and the right cover plate 32 slide in cooperation with the guide rail assembly to facilitate the movement of the left cover plate 31 and the right cover plate 32.

[0060] The drive assembly includes a drive motor 41, two drive shafts 46, two first gears 43 for driving the left cover plate 31 to move, one second gear 44 and two third gears 45 for driving the right cover plate 32 to move. The two first gears 43 are disposed at both ends of a drive shaft 46. Rectangular grooves 321 adapted to the first gears 43 are provided on both sides of the left cover plate 31 so that both first gears 43 mesh with the left cover plate 31.

[0061] Two third gears 45 are disposed at both ends of another transmission shaft 46, and rectangular grooves 321 adapted to the third gears 45 are provided on both sides of the right cover plate 32 so that both third gears 45 mesh with the right cover plate 32.

[0062] Furthermore, the second gear 44 meshes with one of the third gears 45, and a drive motor 41 is provided on one side of the right cover plate 32. The drive motor 41 is connected to the first gear 43 and the second gear 44 via the conveyor belt 42 so that the first gear 43 and the second gear 44 rotate synchronously in the same direction, and the third gear 45 rotates synchronously in the opposite direction with the first gear 43, so as to realize the reverse movement of the left cover plate 31 and the right cover plate 32.

[0063] A second micro switch 35 is provided between the left cover plate 31 and the right cover plate 32, so that when the left cover plate 31 and the right cover plate 32 move and approach each other to a preset position, the second micro switch 35 is triggered, the left cover plate 31 and the right cover plate 32 stop moving, and a cover plate opening 33 is formed between the left cover plate 31 and the right cover plate 32.

[0064] The cover plate assembly 30 also includes a first micro switch 34, which is located on the right side of the right cover plate 32 (in another embodiment, the first micro switch 34 may also be located on the left side of the left cover plate 31) so that when the left cover plate 31 and the right cover plate 32 move away from each other to a preset position, the first micro switch 34 is triggered and the left cover plate 31 and the right cover plate 32 stop moving.

[0065] Specifically, both the first micro switch 34 and the second micro switch 35 include a switch body, a contact rod 341 placed on the switch body, and a contact. The contact is placed inside the contact rod 341. When the left cover plate 31 or the right cover plate 32 contacts the contact rod 341, the contact rod 341 triggers the contact, which in turn triggers the circuit inside the switch body to complete the opening and closing action.

[0066] The guide rail assembly includes a pair of upper and lower stops. The upper stops include two first baffles 51 placed on the upper sides of both ends of the left cover plate 31 and two first baffles 53 placed on the upper sides of both ends of the right cover plate 32. The lower stops include two lower baffles 52 placed on the lower sides of both ends of the left cover plate 31 and two second baffles 54 placed on the lower sides of both ends of the right cover plate 32. A sliding gap is formed between the first baffles 51 and the lower baffles 52 to facilitate the sliding of the left cover plate 31, and a sliding gap is formed between the first baffles 53 and the second baffles 54 to facilitate the sliding of the right cover plate 32, so that the left cover plate 31 and the right cover plate 32 can slide along the sliding gap under the drive of the drive motor 41. Example 2

[0067] A paper shredder employs a high-safety paper shredder mechanism as described in Example 1, such as... Figure 11-12 As shown, the shredder core is mounted on the housing 60, and the paper scraps generated during shredding enter the housing 60. Example 3

[0068] A method for using a paper shredder includes the following steps:

[0069] S1. When shredding a single sheet or a small amount of paper, the machine cover 70 is in the closed state, and the left cover plate 31 and the right cover plate 32 are in the open state. After the paper enters through the paper inlet 71, it passes through the paper feeding cavity and the cover plate assembly 30, and enters the blade shaft assembly 20 for shredding. The shredded paper scraps enter the machine box 60.

[0070] S2. When multiple sheets of paper need to be shredded, open the cover 70. At this time, the drive motor 41 starts, causing the left cover plate 31 and the right cover plate 32 to move closer to each other until the second micro switch 35 is triggered. The drive motor 41 stops, and the left cover plate 31 and the right cover plate 32 stop moving and are in the closed state. Put the paper directly into the paper feeding cavity and close the cover 70. At this time, the drive motor 41 starts again, causing the left cover plate 31 and the right cover plate 32 to move away from each other until the first micro switch 34 is triggered. The drive motor 41 stops, and the left cover plate 31 and the right cover plate 32 stop moving and are in the open state. Start the main motor 21 to open the cutter shaft assembly 20 to shred the paper. The shredded paper scraps enter the machine box 60. Example 4

[0071] Please see Figure 13 Based on Embodiment 1, the shredder core of this embodiment with high safety features has the following differences in its pressing assembly 80: The pressing assembly 80 includes two symmetrically arranged pressing rollers 81, with pressing blocks 82 respectively arranged below the two pressing rollers 81. Each pressing block 82 has an arc-shaped groove 821 adapted to the annular blade below it. Mounting seats 801 are provided at both ends of the pressing rollers 81, and sliding shafts 802 are provided on the mounting seats 801. The sliding shafts 802 pass through the elongated holes at the bottom of the pressing shaft connecting rod and slide in cooperation with the sliding grooves 11. A paper feed groove 803 is formed between the two pressing rollers 81 and between the two pressing blocks 82. When the pressing assembly 80 descends to its limit position, the paper inlet 71 is positioned directly above the paper feed groove 803. This allows the paper to pass through the paper inlet 71 and the paper feed slot 803 into the space between the left and right knife shafts 22 and 23. At this time, the two arc-shaped grooves 821 are tangent to the tips of the ring blades on the left and right knife shafts 22 and 23, respectively, to prevent the pressure block 82 from colliding with the blade tips. The pressure assembly 80 uses a combination of a pressure roller 81 and a pressure block 82, which can increase the weight of the pressure assembly 80 and increase the pressure on the paper laid flat in the paper feeding cavity. Through the cooperation of the arc-shaped grooves 821 and the ring blades, the paper laid flat in the paper feeding cavity is squeezed between the arc-shaped grooves 821 and the ring blades. Therefore, the paper can be pressed more tightly, so that all the paper placed in the paper feeding cavity can be crushed and paper jams can be avoided. Example 5

[0072] Please see Figure 14 and Figure 15Based on Embodiment 1, the shredder core of this embodiment with high safety features has the following differences in its pressing component 80: The pressing component 80 includes a pressing bracket 83, with mounting seats 801 at both ends of the pressing bracket 83. A sliding shaft 802 is mounted on the mounting seat 801, and the sliding shaft 802 passes through the elongated hole at the bottom end of the pressing shaft connecting rod and slides in cooperation with the sliding groove 11; a support paper feed groove 831 is provided in the middle of the pressing bracket 83, and inclined pressing plates 84 are provided on both sides of the pressing bracket 83. The two ends of each pressing plate 84 are fixedly connected to the mounting seat 801, and the bottom end of the pressing plate 84 forms a tangent portion 841. A paper feed slot 803 is formed between 41. The paper feed slot 803 is located below the paper feed slot 831 of the support, so that the paper can pass through the paper feed port 71, the paper feed slot 831 of the support, and the paper feed slot 803 into the space between the left knife shaft 22 and the right knife shaft 23. When the pressing assembly 80 descends to its limit position, the tangent part 841 of the two pressing plates 84 is tangent to the blade tip on the annular blade on the left knife shaft 22 and the right knife shaft 23, respectively, to avoid the pressing plate 84 from colliding with the blade tip. The pressing assembly 80 adopts a combination of pressing support 83 and pressing plate 84, which can increase the weight of the pressing assembly 80 to increase the pressure on the paper laid flat in the paper feeding cavity. Example 6

[0073] Please see Figure 16 and Figure 17 Based on Embodiment 5, the pressing component 80 in this embodiment has the following differences: the lower end of the inclined pressing plate 84 is provided with a bending portion 842, and the bending portion 842 transitions to the tangent portion 841, making the tangent portion 841 more gentle, so as to obtain a better paper pressing effect. Example 7

[0074] Please see Figure 18Based on Embodiment 1, the shredder core of this embodiment with high safety features has the following differences in its pressing component 80: The pressing component 80 includes a pressing bracket 83, with mounting seats 801 at both ends of the pressing bracket 83. A sliding shaft 802 is mounted on the mounting seat 801, passing through an elongated hole at the bottom of the pressing shaft connecting rod and slidingly engaging with the slide groove 11; a support paper feed groove 831 is provided in the middle of the pressing bracket 83, and a first pressure roller 85 is provided on each side of the pressing bracket 83. The two ends of the first pressure roller 85 are rotatably connected to the mounting seat 801, and a second pressure roller 86 is provided on each side of the support paper feed groove 831 below the pressing bracket 83. The paper feed groove 803 is formed between the two second pressure rollers 86 and is rotatably connected to the mounting base 801. The paper feed groove 803 is located below the paper feed groove 831 of the bracket, so that the paper can pass through the paper feed port 71, the paper feed groove 831 of the bracket, and the paper feed groove 803 into the space between the left knife shaft 22 and the right knife shaft 23. When the pressing assembly 80 descends to its limit position, the two second pressure rollers 86 are tangent to the blade tips on the annular blades on the left knife shaft 22 and the right knife shaft 23, respectively, to avoid excessive cutting and collision between the second pressure rollers 86 and the blade tips. The pressing assembly 80 adopts a combination of the pressing bracket 83, the first pressure roller 85, and the second pressure roller 86, which can increase the weight of the pressing assembly 80 to increase the pressure on the paper laid flat in the paper feeding cavity.

[0075] Obviously, the above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, these obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A highly secure paper shredder mechanism, characterized in that: The machine includes a frame (10), a blade shaft assembly (20), a pressing assembly (80), and a cover (70). The blade shaft assembly (20) is rotatably disposed inside the frame (10), and a paper feeding cavity is formed above the blade shaft assembly (20). The cover (70) is rotatably disposed on one side of the top of the frame (10). The cover (70) is provided with a paper inlet (71) and a movable pressing assembly (80). The two sides of the frame (10) are provided with grooves (11) to limit the sliding trajectory of the pressing assembly (80), so that the pressing assembly (80) is placed above the blade shaft assembly (20) when the cover (70) is closed. A movable cover plate assembly (30) is provided inside the frame (10), so that the cover plate assembly (30) is placed above the blade shaft assembly (20) when the cover (70) is opened.

2. The high-safety paper shredder core according to claim 1, characterized in that, The cover plate assembly (30) includes a left cover plate (31) and a right cover plate (32) that are arranged in opposite directions. A second micro switch (35) is provided between the left cover plate (31) and the right cover plate (32) so that when the left cover plate (31) and the right cover plate (32) move and approach each other to a preset position, the second micro switch (35) is triggered, the left cover plate (31) and the right cover plate (32) stop moving, and a cover plate opening (33) is formed between the left cover plate (31) and the right cover plate (32).

3. The high-safety paper shredder core according to claim 2, characterized in that, The cover plate assembly (30) further includes a drive assembly for driving the left cover plate (31) and the right cover plate (32) to move in opposite directions; the drive assembly includes a drive motor (41), a first gear (43) for driving the left cover plate (31) to move, a second gear (44) for driving the right cover plate (32) to move, and a third gear (45). The first gear (43) meshes with the left cover plate (31); the second gear (44) meshes with the third gear (45), and the third gear (45) meshes with the right cover plate (32). The drive motor (41) is driven by the first gear (43) and the second gear (44) via the conveyor belt (42) so that the first gear (43) and the third gear (45) rotate synchronously in opposite directions.

4. The high-safety paper shredder core according to claim 3, characterized in that, A first gear (43) is provided on each side of the left cover plate (31), and rectangular grooves (321) that mesh with the first gear (43) are provided on both sides of the left cover plate (31). A third gear (45) is provided on each side of the right cover plate (32), and rectangular grooves (321) that mesh with the third gear (45) are provided on both sides of the right cover plate (32). The two first gears (43) and the two third gears (45) are respectively driven by a transmission shaft (46) so that the two sides of the left cover plate (31) and the right cover plate (32) are simultaneously driven by gears.

5. The high-safety paper shredder core according to claim 4, characterized in that, The cover plate assembly (30) also includes a guide rail assembly disposed on the frame. The left cover plate (31) and the right cover plate (32) are slidably engaged with the guide rail assembly to facilitate the movement of the left cover plate (31) and the right cover plate (32). The cover plate assembly (30) further includes a first micro switch (34), which is placed on the outside of the left cover plate (31) or the right cover plate (32) so that when the left cover plate (31) and the right cover plate (32) move away from each other to a preset position, the first micro switch (34) is triggered and the left cover plate (31) and the right cover plate (32) stop moving.

6. The high-safety paper shredder core according to claim 5, characterized in that, The slide (11) includes an inclined groove (111) and a longitudinal groove (112) that are interconnected. When the pressing component (80) moves to the bottom end of the longitudinal groove (112), the pressing component (80) is tangential to the tip of the cutter shaft assembly (20) to limit the extreme position of the pressing component (80). The guide rail assembly includes an upper stop and a lower stop, and a sliding gap is formed between the upper stop and the lower stop to facilitate the sliding of the left cover plate (31) and the right cover plate (32), so that the left cover plate (31) and the right cover plate (32) slide along the sliding gap.

7. The high-safety paper shredder core according to claim 6, characterized in that, The pressing assembly includes two symmetrically arranged pressing rollers, with pressing blocks arranged below each of the two pressing rollers, and an arc-shaped groove arranged below each pressing block.

8. A high-safety paper shredder core according to claim 6, characterized in that, The pressing assembly includes a pressing bracket, a paper feed slot in the middle of the pressing bracket, inclined pressing plates on both sides of the pressing bracket, and a tangent portion at the bottom of the pressing plate.

9. A high-safety paper shredder core according to claim 6, characterized in that, The pressing assembly includes a pressing bracket, a paper feed groove for the bracket is provided in the middle of the pressing bracket, a first pressure roller is provided on each side of the pressing bracket, and a second pressure roller is provided on each side of the paper feed groove for the bracket below the pressing bracket. The two ends of the second pressure roller are rotatably connected to the mounting base, and a paper feed groove is formed between the two second pressure rollers. The paper feed groove is located below the paper feed groove for the bracket.

10. A paper shredder, characterized in that, A highly secure paper shredder core is adopted according to any one of claims 1-9.

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