Paper shredder core with high safety and paper shredder

Abstract

The high-safety paper shredder core comprises a frame body, a cutter shaft assembly, a downward pressing assembly and a machine cover, the cutter shaft assembly is rotationally arranged in the frame body, a paper containing cavity is formed above the cutter shaft assembly, the machine cover is rotationally arranged on one side of the top end of the frame body, a paper inlet and the movable downward pressing assembly are arranged on the machine cover, and the machine cover is arranged on the top end of the frame body. 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, multiple 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 a paper inlet can be directly placed into the paper placing cavity to be treated; 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] The invention relates to the technical field of paper shredders, in particular to a paper shredder core and a paper shredder with high safety. Background Art

[0002] As a common office equipment, shredders are widely used. They can be used to shred paper and CDs, etc. to prevent the leakage of important information.

[0003] The existing automatic paper shredder includes a chassis, a movement and a pressure cover assembly. The movement is fixedly arranged on the top of the chassis, and the pressure cover assembly includes a frame, a cover, an inner shell and a pressing assembly. The tail end of the cover is hingedly matched with the frame, the frame is fixedly arranged on the top of the chassis, the top of the inner shell is fixedly connected to the frame, and the bottom end of the inner shell is placed above the movement. The pressing assembly includes a pressing shaft and a connecting rod placed at both ends of the pressing shaft. Connecting columns are arranged at both ends of the pressing shaft, and long holes are vertically arranged at the bottom ends of the connecting rods. The connecting columns are slidably matched in the corresponding long holes of the connecting rods. Slide grooves suitable for the sliding of the connecting columns are arranged on both sides of the middle part of the inner shell, and the top end of the connecting rod is hingedly matched with both sides of the cover, so that when the cover is opened, the pressing shaft can be driven to rise through the connecting rod, and the paper enters the movement through the inner shell. When the cover is closed, the pressing shaft descends to press the paper in the inner shell.

[0004] On this basis, an improved pressure cover for a shredder is provided, comprising a frame, a machine cover, an inner shell, and a pressing assembly; a rotatable left knife shaft and a right knife shaft are arranged below the inner shell, and a plurality of groups of annular blades with knife tips are sleeved on the left knife shaft and the right knife shaft; a paper feed slot is provided on the top of the machine cover for shredding paper without opening the cover; the pressing assembly comprises a left pressing shaft and a right pressing shaft symmetrically arranged above the left knife shaft and the right knife shaft, and the axes of the left pressing shaft and the right pressing shaft are in the same direction as the axes of the left knife shaft and the right knife shaft; when the pressing assembly is lowered to the extreme position, the left pressing shaft is tangent to the knife tip on the annular blade on the left knife shaft, and the right pressing shaft is tangent to the knife tip on the annular blade on the right knife shaft; this is used to avoid overcutting and collision between the left pressing shaft and the right pressing shaft and the knife tips.

[0005] In the shredder constructed by the above technical solution, when the cover is in the open state for paper loading operation, there is a great safety hazard because the cutter assembly is in an unobstructed state. Summary of the invention

[0006] The technical problem to be solved by the present invention is to design a shredder that can safely meet the needs of shredding a single sheet of paper, multiple sheets of paper, or large sheets of paper on the same shredder, thereby improving the safety of the existing shredders.

[0007] In order to solve the above technical problems, the present invention provides a highly safe shredder movement, including a frame, a knife shaft assembly, a pressing assembly, and a machine cover. The knife shaft assembly is rotatably arranged in the frame, and a paper placement cavity is formed above the knife shaft assembly. The machine cover is rotatably arranged on one side of the top of the frame, and a paper feed port and a movable pressing assembly are arranged on the machine cover. Slide grooves for limiting the sliding trajectory of the pressing assembly are arranged on both sides of the frame, so that the pressing assembly is placed above the knife shaft assembly when the machine cover is closed; a movable cover assembly is arranged in the frame, so that the cover assembly is placed above the knife shaft assembly when the machine cover is opened.

[0008] Furthermore, the cover plate assembly includes a left cover plate and a right cover plate which are arranged to move in opposite directions, and a second micro switch is arranged 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, and 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 driving assembly for driving the left cover plate and the right cover plate to move in opposite directions; the driving assembly includes a driving motor, a first gear for driving the left cover plate to move, a second gear and a third gear for driving the right cover plate to move, the first gear is meshed with the left cover plate; the second gear is meshed with the third gear, and the third gear is meshed with the right cover plate, and the driving motor cooperates with the first gear and the second gear through a conveyor belt to make the first gear and the third gear rotate synchronously in opposite directions.

[0010] Furthermore, a first gear is respectively arranged on both sides of the left cover plate, and rectangular grooves meshing with the first gear are arranged on both sides of the left cover plate; a third gear is respectively arranged on both sides of the right cover plate, and rectangular grooves meshing with the third gear are arranged on both sides of the right cover plate; transmission is respectively carried out between the two first gears and between the two third gears via transmission shafts, so that gear transmission is carried out on both sides of the left cover plate and the right cover plate at the same time.

[0011] Furthermore, the cover plate assembly also includes a guide rail assembly arranged on the frame body, and the left cover plate and the right cover plate are slidably matched 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 disposed on the outside of the left cover plate or the right cover plate, so that when the left cover plate and the right cover plate move away from each other to a preset position, the first micro switch is triggered and the left cover plate and the right cover plate stop moving.

[0013] Furthermore, the slide groove includes an inclined groove and a longitudinal groove that are interconnected. When the pressing assembly moves to the bottom end of the longitudinal groove, the pressing assembly is tangent to the tip of the knife shaft assembly to limit the extreme position of the pressing assembly.

[0014] Furthermore, the guide rail assembly includes an upper stopper and a lower stopper, and a sliding gap suitable for the left cover plate and the right cover plate to slide is formed between the upper stopper and the lower stopper, 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, a pressing block is arranged below the two pressing rollers, and an arc groove is arranged below each pressing block.

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

[0017] Furthermore, a bending portion is provided at the lower end of the lower pressing plate, and the bending portion transitions to the tangent portion.

[0018] Furthermore, the pressing assembly includes a pressing bracket, a bracket paper feed slot is arranged in the middle of the pressing bracket, a first pressing roller is arranged on both sides of the pressing bracket, and a second pressing roller is arranged on both sides of the bracket paper feed slot below the pressing bracket, both ends of the second pressing roller are rotatably connected to the mounting seat, and a paper feed slot is formed between the two second pressing rollers, and the paper feed slot is placed below the bracket paper feed slot.

[0019] A paper shredder adopts the above-mentioned paper shredder movement with high safety.

[0020] The method for using the above-mentioned shredder comprises the following steps: S1. When a single sheet or a small amount of paper is shredded, the machine cover is in a closed state, the left cover and the right cover are in an open state, and the paper enters through the paper inlet, passes through the paper placement cavity, the cover assembly, and enters between the knife shaft assemblies for shredding; S2. When multiple sheets of paper need to be shredded, the machine cover is opened, and the driving motor is started at this time, so that the left cover and the right cover are close to each other until the second micro switch is triggered, and the driving motor stops, the left cover and the right cover stop moving and are in a closed state, and the paper is directly placed in the paper placement cavity, and the machine cover is closed. At this time, the driving motor is started again, so that the left cover and the right cover are away from each other until the first micro switch is triggered, and the driving motor stops, the left cover and the right cover stop moving and are in an open state, and the main motor is started to open the knife shaft assembly to achieve paper shredding.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The setting of the pressing component and the paper placing cavity makes it convenient to place many sheets of paper at one time without having to place the paper multiple times. For the paper with a larger size that cannot enter through the paper inlet, the paper can be directly placed in the paper placing cavity for processing. By setting the cover assembly, the knife shaft assembly is shielded when the cover is opened, so as to prevent the knife shaft assembly from scratching the limbs when placing paper; By utilizing the reverse rotation of the first gear and the third gear, the left cover plate and the right cover plate can be conveniently controlled to move away from or approach each other, thereby realizing the opening and closing function; The setting of the first micro switch and the second micro switch can effectively limit the moving position of the left cover plate and the right cover plate to achieve precise control.

[0022] The arrangement of the inclined groove and the longitudinal groove ensures that when the pressing assembly moves to the bottom end of the longitudinal groove, the pressing assembly is tangent to the tip of the knife shaft assembly, ensuring that all paper entering the paper placement cavity can be crushed smoothly, avoiding paper residue and incomplete crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a three-dimensional structural schematic diagram of the movement in the first embodiment of the present invention; Figure 2 is a side view of the movement in the first embodiment of the present invention; Figure 3 for Figure 2 A partial enlarged schematic diagram of the middle A area; Figure 4 It is a three-dimensional structural schematic diagram of the first embodiment of the present invention, in which the cover plate assembly is opened after the movement has been removed from the blade shaft assembly; Figure 5 It is a three-dimensional structural schematic diagram of the cover plate assembly in the closed state after the movement has removed the blade shaft assembly in the first embodiment of the present invention; Figure 6 is a schematic diagram of the exploded structure of the cover plate assembly in the first embodiment of the present invention; Figure 7 is a schematic diagram of the exploded structure of the guide rail assembly in the first embodiment of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the left cover plate in the first embodiment of the present invention; Fig. 9 is a schematic diagram of the three-dimensional structure of the transmission shaft; Fig.10 is a schematic diagram of the three-dimensional structure of the first micro switch; Fig.11 It is a three-dimensional structural schematic diagram of a cover assembly of a paper shredder in a closed state in a second embodiment of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the cover assembly of the paper shredder in the second embodiment of the present invention in an open state; Fig.13 It is a schematic diagram of the three-dimensional structure of the pressing assembly in Example 3 of the present invention; Fig.14 It is a schematic diagram of the three-dimensional structure of the pressing assembly in Example 4 of the present invention; Fig.15 for Fig.14 A partial enlarged view of the middle B area; Fig.16 It is a schematic diagram of the three-dimensional structure of the pressing assembly in Example 5 of the present invention; Fig.17 for Fig.16 A partial enlarged view of the middle C area; Fig.18 It is a schematic diagram of the three-dimensional structure of the pressing assembly in Example 6 of the present invention; In the figure: 10, frame; 101, support shell; 102, first induction switch; 11, slide slot; 111, inclined slot; 112, longitudinal slot; 20, knife shaft assembly; 21, main motor; 22, left knife shaft; 23, right knife shaft; 221, bearing; 30, cover assembly; 31, left cover; 32, right cover; 33, cover opening; 34, first micro switch; 35, second micro switch; 321, rectangular slot; 341, touch rod; 41, drive motor; 42, conveyor belt; 43, first gear; 44, second gear; 4 5. The third gear; 46. The transmission shaft; 51. The first baffle; 52. The lower baffle; 53. The first baffle; 54. The second baffle; 60. The chassis; 70. The cover; 71. The paper feed port; 72. The second induction switch; 80. The pressing assembly; 801. The mounting seat; 802. The sliding shaft; 803. The paper feed slot; 81. The pressing roller; 82. The pressing block; 821. The arc groove; 83. The pressing bracket; 831. The bracket paper feed slot; 84. The pressing plate; 841. The tangent portion; 842. The bending portion; 85. The first pressing roller; 86. The second pressing roller. DETAILED DESCRIPTION

[0024] 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. Example 1

[0025] See also Figure 1-Figure 10 A paper shredder core with high safety includes a frame 10, a knife shaft assembly 20, a pressing assembly 80, and a machine cover 70. The knife shaft assembly 20 is rotatably arranged in the frame 10, and the knife shaft assembly 20 includes a left knife shaft 22 and a right knife shaft 23 that can be rotatably arranged. The left knife shaft 22 and the right knife shaft 23 are provided with a plurality of groups of annular blades with knife tips for rotating paper shredding; bearing holes are arranged on both sides of the lower part of the frame 10, and the two ends of the left knife shaft 22 and the right knife shaft 23 are respectively rotatably matched with the frame 10 through bearings 221, and the left knife shaft 22 and the right knife shaft 23 are controlled to rotate by the main motor 21.

[0026] The two sides of the frame 10 are provided with slide grooves 11 for limiting the sliding track of the pressing assembly 80. The slide 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 and is used to limit the running track of the pressing seat; the longitudinal groove 112 is arranged vertically relative to the horizontal plane and is used to limit the pressing assembly 80 to be symmetrically arranged above the left knife shaft and the right knife shaft. The limit position, and ensure that the pressing assembly 80 moves vertically up and down; A machine cover 70 is rotatably set on one side of the top end of the frame 10, and a paper feed port 71 and a movable pressing assembly 80 are set on the machine cover 70. The pressing assembly 80 includes a symmetrically arranged left pressing shaft and a right pressing shaft, and mounting seats are respectively set 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 slot is formed between the left pressing shaft and the right pressing shaft, and the left pressing shaft and the right pressing shaft are rotatably connected to the mounting seats. Sliding shafts are respectively set on the two mounting seats, and the pressing assembly 80 also includes two pressing shaft connecting rods. The top ends of the two pressing shaft connecting rods are rotatably set on the machine cover 70, and a long hole is set at the bottom end of each pressing shaft connecting rod. The sliding shaft passes through the long hole and slides with the slide groove 11.

[0027] When the pressing assembly 80 descends to the extreme position, the paper feed port 71 is placed directly above the paper feed slot, so that the paper passes through the paper feed port and the paper feed slot and enters between the left knife shaft 22 and the right knife shaft 23; the left pressing shaft is tangent to the knife tip on the annular blade on the left knife shaft 22, and the right pressing shaft is tangent to the knife tip on the annular blade on the right knife shaft 23; it is used to avoid overcutting and collision between the left pressing shaft, the right pressing shaft and the knife tip.

[0028] The working process is as follows: when the cover 70 is closed, the left and right pressing shafts slide down along the long strip hole under the action of gravity, and at the same time enter the longitudinal groove 112 along the inclined groove 111 and move downward to the lowest position. The cover 70 is completely closed, and the left and right pressing shafts are supported by the paper. When there is paper in the frame 10 for shredding, the pressing shaft seat gradually moves downward along the long strip hole until the lowest position is the limit position. At this time, the paper is cleared, the left pressing shaft is tangent to the tip of the annular blade on the left knife shaft, and the right pressing shaft is tangent to the tip of the annular blade on the right knife shaft. A support shell 101 is provided in the frame 10, and the bottom of the support shell 101 is curved to form a paper placement cavity, so that a whole sheet of paper can be placed in it. A second induction switch 72 electrically connected to the main motor 21 is provided at the paper inlet 71 of the cover 70, so that when the cover 70 is closed and paper enters the paper inlet 71, the second induction switch 72 is blocked, and the second induction switch 72 transmits a start signal to the main motor 21, and the main motor 21 drives the knife shaft assembly 20 to start and perform paper shredding. The support housing 101 is provided with a first induction switch 102 electrically connected to the main motor 21, so that when a paper is placed in the paper placement cavity to block the first induction switch 102 and the cover 70 is closed, the pressing assembly 80 presses down the paper, and the first induction switch 102 transmits a start signal to the main motor 21, and the main motor 21 drives the knife shaft assembly 20 to start and perform the paper shredding operation; A movable cover assembly 30 is disposed in the frame 10 so that the cover assembly 30 is placed above the knife shaft assembly 20 when the machine cover 70 is opened.

[0029] The cover plate assembly 30 includes a left cover plate 31 and a right cover plate 32 which can be moved in opposite directions, and also includes a driving assembly for driving the left cover plate 31 and the right cover plate 32 to move in opposite directions, and a guide rail assembly arranged 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.

[0030] The driving assembly includes a driving motor 41, two transmission shafts 46, two first gears 43 for driving the left cover plate 31 to move, a second gear 44 and two third gears 45 for driving the right cover plate 32 to move, the two first gears 43 are arranged at both ends of a transmission shaft 46, and rectangular grooves 321 adapted to the first gears 43 are arranged on both sides of the left cover plate 31, so that the two first gears 43 are meshed with the left cover plate 31; Two third gears 45 are arranged at both ends of another transmission shaft 46, and rectangular grooves 321 adapted to the third gears 45 are arranged on both sides of the right cover plate 32, so that the two third gears 45 are meshed with the right cover plate 32; The second gear 44 is meshed with one of the third gears 45. A driving motor 41 is set on one side of the right cover plate 32, and the driving motor 41 is transmitted and cooperated with the first gear 43 and the second gear 44 through 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 and the first gear 43 rotate synchronously in the opposite direction, so as to realize the reverse movement of the left cover plate 31 and the right cover plate 32.

[0031] 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, and 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.

[0032] The cover assembly 30 also includes a first micro switch 34, which is placed on the right side of the right cover 32 (in another embodiment, the first micro switch 34 can also be placed on the left side of the left cover 31), so that when the left cover 31 and the right cover 32 move away from each other to a preset position, the first micro switch 34 is triggered, and the left cover 31 and the right cover 32 stop moving.

[0033] Specifically, the first micro switch 34 and the second micro switch 35 each include a switch body, a contact rod 341 disposed on the switch body, and a contact point, and the contact point is disposed on the inner side of the contact rod 341. When the left cover plate 31 or the right cover plate 32 contacts the contact rod 341, the contact point is triggered by the contact rod 341, and the contact point triggers the circuit in the switch body to complete the opening and closing action. The guide rail assembly includes an upper baffle and a lower baffle arranged in pairs, the upper baffle includes two first baffles 51 placed on the upper sides of the two ends of the left cover plate 31, and two first baffles 53 placed on the upper sides of the two ends of the right cover plate 32; the lower baffle includes two lower baffles 52 placed on the lower sides of the two ends of the left cover plate 31, and two second baffles 54 placed on the lower sides of the two ends of the right cover plate 32; a sliding gap suitable for the sliding of the left cover plate 31 is formed between the first baffle 51 and the lower baffle 52, and a sliding gap suitable for the sliding of the right cover plate 32 is formed between the first baffle 51 and the lower baffle 52, 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

[0034] A paper shredder, using a highly secure paper shredder core in Example 1, such as Figure 11-12 As shown, the shredder core is arranged on the chassis 60 , and the paper scraps generated when shredding paper enter the chassis 60 . Example 3

[0035] A method for using a paper shredder comprises the following steps: S1. When a single sheet or a small amount of paper is to be shredded, the machine cover 70 is in a closed state, the left cover plate 31 and the right cover plate 32 are in an open state, and the paper enters through the paper inlet 71, passes through the paper placement cavity, the cover plate assembly 30, and enters between the knife shaft assembly 20 for shredding, and the shredded paper scraps enter the chassis 60; S2. When multiple sheets of paper need to be shredded, the machine cover 70 is opened, and the driving motor 41 is started at this time, so that the left cover 31 and the right cover 32 are close to each other until the second micro switch 35 is triggered, and the driving motor 41 stops, the left cover 31 and the right cover 32 stop moving and are in a closed state, and the paper is directly placed in the paper placement cavity, and the machine cover 70 is closed. At this time, the driving motor 41 is started again, so that the left cover 31 and the right cover 32 are away from each other until the first micro switch 34 is triggered, and the driving motor 41 stops, the left cover 31 and the right cover 32 stop moving and are in an open state, and the main motor 21 is started to open the knife shaft assembly 20 to realize paper shredding, and the shredded paper scraps enter the chassis 60. Example 4

[0036] See also Fig.13 On the basis of Example 1, a shredder core with high safety in this embodiment has the following differences in its pressing assembly 80: the pressing assembly 80 includes two symmetrically arranged pressing rollers 81, and pressing blocks 82 are respectively arranged below the two pressing rollers 81. An arc groove 821 matching the annular blade is arranged below each pressing block 82. Mounting seats 801 are arranged at both ends of the pressing roller 81, and a sliding shaft 802 is arranged on the mounting seat 801. The sliding shaft 802 passes through the long strip hole at the bottom end of the pressing shaft connecting rod and slides with the slide groove 11; a paper feed slot 803 is formed between the two pressing rollers 81 and between the two pressing blocks 82. When the pressing assembly 80 is lowered to the limit position, the paper feed port 71 is placed directly above the paper feed slot 803. , so that the paper passes through the paper feed port 71 and the paper feed slot 803 and enters between the left knife shaft 22 and the right knife shaft 23, and at this time, the two arc grooves 821 are tangent to the knife tips on the annular blades on the left knife shaft 22 and the right knife shaft 23 respectively, so as to avoid the downward pressure block 82 from overcutting and colliding with the knife tips; the downward pressure component 80 adopts a combination of a downward pressure roller 81 and a downward pressure block 82, which can increase the weight of the downward pressure component 80 to increase the pressure on the paper laid flat in the paper placement cavity; through the cooperation of the arc groove 821 and the annular blade, the paper laid flat in the paper placement cavity is squeezed between the arc groove 821 and the annular blade, so that the paper can be pressed down more tightly, so that the paper placed in the paper placement cavity can be completely crushed to avoid paper jam. Example 5

[0037] See also Fig.14 and Fig.15On the basis of Example 1, a shredder mechanism with high safety in this embodiment has the following differences in its pressing assembly 80: the pressing assembly 80 includes a pressing bracket 83, mounting seats 801 are arranged at both ends of the pressing bracket 83, a sliding shaft 802 is arranged on the mounting seat 801, the sliding shaft 802 passes through the long hole at the bottom end of the pressing shaft connecting rod and slides with the slide groove 11; a bracket paper feed slot 831 is arranged in the middle of the pressing bracket 83, and inclined pressing plates 84 are arranged on both sides of the pressing bracket 83, and both ends of each pressing plate 84 are fixedly connected to the mounting seat 801, and a tangent portion 841 is formed at the bottom end of the pressing plate 84, and the two tangent portions 841 are tangent to each other. 41, and the paper feed slot 803 is placed below the bracket paper feed slot 831, so that the paper can pass through the paper inlet 71, the bracket paper feed slot 831, and the paper feed slot 803 to enter between the left knife shaft 22 and the right knife shaft 23; when the pressing assembly 80 is lowered to the extreme position, the tangent parts 841 of the two pressing plates 84 are tangent to the knife tips on the annular blades on the left knife shaft 22 and the right knife shaft 23, respectively, so as to avoid the pressing plates 84 from overcutting and colliding with the knife tips; the pressing assembly 80 adopts a combination of a pressing bracket 83 and a 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 placement cavity. Example 6

[0038] See also Fig.16 and Fig.17 On the basis of Example 5, the pressing assembly 80 in this embodiment has the following difference: a bending portion 842 is provided at the lower end of the inclined pressing plate 84, and the bending portion 842 transitions to the tangent portion 841, so that the tangent portion 841 is relatively gentle, so as to obtain a better paper pressing effect. Example 7

[0039] See also Fig.18On the basis of Example 1, a shredder mechanism with high safety in this embodiment has the following differences in its pressing assembly 80: the pressing assembly 80 includes a pressing bracket 83, mounting seats 801 are arranged at both ends of the pressing bracket 83, a sliding shaft 802 is arranged on the mounting seat 801, the sliding shaft 802 passes through the long strip hole at the bottom end of the pressing shaft connecting rod and slides with the slide groove 11; a bracket paper feed slot 831 is arranged in the middle of the pressing bracket 83, a first pressing roller 85 is arranged on both sides of the pressing bracket 83, and the two ends of the first pressing roller 85 are rotatably connected to the mounting seat 801, and a second pressing roller 86 is arranged on both sides of the bracket paper feed slot 831 below the pressing bracket 83, and the two ends of the second pressing roller 86 It is rotatably connected to the mounting seat 801, and a paper feed slot 803 is formed between the two second pressure rollers 86. The paper feed slot 803 is placed below the bracket paper feed slot 831, so that the paper can pass through the paper inlet 71, the bracket paper feed slot 831, and the paper feed slot 803 to enter between the left knife shaft 22 and the right knife shaft 23; when the pressing assembly 80 is lowered to the extreme position, the two second pressure rollers 86 are tangent to the knife tips on the annular blades on the left knife shaft 22 and the right knife shaft 23 respectively, so as to avoid the second pressure rollers 86 from overcutting and colliding with the knife tips; the pressing assembly 80 adopts a combination of the pressing bracket 83 plus 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 placement cavity.

[0040] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A highly safe paper shredder movement, characterized by: The invention comprises a frame (10), a knife shaft assembly (20), a pressing assembly (80), and a machine cover (70); the knife shaft assembly (20) is rotatably arranged in the frame (10), and a paper placing cavity is formed above the knife shaft assembly (20); a machine cover (70) is rotatably arranged on one side of the top end of the frame (10); a paper feed port (71) and a movable pressing assembly (80) are arranged on the machine cover (70); sliding grooves (11) for limiting the sliding track of the pressing assembly (80) are arranged on both sides of the frame (10), so that the pressing assembly (80) is placed above the knife shaft assembly (20) when the machine cover (70) is closed; and a movable cover assembly (30) is arranged in the frame (10), so that the cover assembly (30) is placed above the knife shaft assembly (20) when the machine cover (70) is opened.

2. A highly secure paper shredder core according to claim 1, characterized in that: The cover plate assembly (30) comprises a left cover plate (31) and a right cover plate (32) which are arranged to move in opposite directions, and a second micro switch (35) is arranged 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, and 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. A highly safe paper shredder core according to claim 2, characterized in that: The cover plate assembly (30) further comprises a driving assembly for driving the left cover plate (31) and the right cover plate (32) to move in opposite directions; the driving assembly comprises a driving motor (41), a first gear (43) for driving the left cover plate (31) to move, a second gear (44) and a third gear (45) for driving the right cover plate (32) to move, the first gear (43) being meshed with the left cover plate (31); the second gear (44) being meshed with the third gear (45), and the third gear (45) being meshed with the right cover plate (32); the driving motor (41) is coupled to the first gear (43) and the second gear (44) via a conveyor belt (42) so that the first gear (43) and the third gear (45) rotate synchronously in opposite directions.

4. A highly safe paper shredder core according to claim 3, characterized in that: A first gear (43) is provided on both sides of the left cover plate (31), and a rectangular groove (321) meshing with the first gear (43) is provided on both sides of the left cover plate (31). A third gear (45) is provided on both sides of the right cover plate (32), and a rectangular groove (321) meshing with the third gear (45) is provided on both sides of the right cover plate (32). Transmission is respectively carried out between the two first gears (43) and between the two third gears (45) via a transmission shaft (46), so that gear transmission is carried out on both sides of the left cover plate (31) and the right cover plate (32) at the same time.

5. A highly safe paper shredder core according to claim 4, characterized in that: The cover plate assembly (30) further comprises a guide rail assembly arranged on the frame, and the left cover plate (31) and the right cover plate (32) are slidably matched 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 comprises a first micro switch (34), wherein the first micro switch (34) is disposed 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. A highly safe paper shredder core according to claim 5, characterized in that: The slide groove (11) comprises an inclined groove (111) and a longitudinal groove (112) which are interpenetrating with each other, and when the pressing assembly (80) moves to the bottom end of the longitudinal groove (112), the pressing assembly (80) is arranged tangent to the tip of the knife shaft assembly (20), so as to limit the extreme position of the pressing assembly (80); The guide rail assembly comprises an upper stopper and a lower stopper, and a sliding gap suitable for the left cover plate (31) and the right cover plate (32) to slide is formed between the upper stopper and the lower stopper, so that the left cover plate (31) and the right cover plate (32) slide along the sliding gap.

7. A highly secure paper shredder core according to claim 6, characterized in that: The pressing assembly comprises two pressing rollers which are symmetrically arranged, and pressing blocks are arranged below the two pressing rollers respectively, and arc grooves are arranged below each pressing block.

8. A highly safe paper shredder core according to claim 6, characterized in that: The pressing assembly comprises a pressing bracket, a bracket paper feeding slot is arranged in the middle of the pressing bracket, inclined pressing plates are arranged on both sides of the pressing bracket, and the bottom ends of the pressing plates form a tangent portion.

9. A highly safe paper shredder core according to claim 6, characterized in that: The pressing assembly includes a pressing bracket, a bracket paper feed slot is arranged in the middle of the pressing bracket, a first pressing roller is arranged on both sides of the pressing bracket, and a second pressing roller is arranged on both sides of the bracket paper feed slot below the pressing bracket, both ends of the second pressing roller are rotatably connected to the mounting seat, and a paper feed slot is formed between the two second pressing rollers, and the paper feed slot is placed below the bracket paper feed slot.

10. A paper shredder, characterized in that: A paper shredder core with high safety as described in any one of claims 1 to 9 is adopted.

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