CN220697000U - Automatic paper shredder - Google Patents

Abstract

The utility model belongs to the technical field of paper shredders, and discloses an automatic paper shredder, which comprises a machine table, a paper feeding assembly, a paper guiding assembly and a roller assembly, wherein a paper shredding cutter is arranged in the machine table; the paper feeding board assembly is fixedly arranged on the machine table and is positioned above the paper shredding cutter; the paper guide plate assembly is rotatably arranged on the machine table; the roller assembly is rotationally arranged on the paper guide plate assembly, the roller assembly comprises a torsion spring, a support and a roller, one end of the support is rotationally connected with the paper guide plate assembly, the roller is rotationally arranged at the other end of the support, one end of the torsion spring is abutted to the paper guide plate assembly, the other end of the torsion spring is abutted to the support, and the torsion spring is used for pushing one end of the support, on which the roller is arranged, to lean against paper on the paper feeding plate assembly. The automatic paper shredder can facilitate an operator to rotate the roller, so that the roller is separated from the machine table, and the operator can conveniently take out the paper jam; and meanwhile, an operator can conveniently clean dust on the roller.

Description

Automatic paper shredder

Technical Field

The utility model relates to the technical field of paper shredders, in particular to an automatic paper shredder.

Background

The paper shredder is a common office supply, when the paper shredder runs, the motor drives the roller to rotate, the roller contacts with paper on the paper table, the paper is driven to enter the paper shredding passage by friction force, a paper shredding cutter is arranged in the paper shredding passage, and the paper is shredded by the paper shredding cutter; when more dust is on the roller, the automatic paper feeding can be influenced.

Therefore, there is a need for an automatic paper shredder, which is convenient for an operator to rotate the roller and separate the roller from the machine when a paper jam occurs, so that the operator can take out the paper jam; meanwhile, an operator can clean and maintain the roller conveniently.

Disclosure of Invention

One object of the present utility model is to: the automatic paper shredder is provided, so that an operator can conveniently rotate the roller, and the roller is separated from the machine table, so that the operator can conveniently take out the paper jam.

To achieve the purpose, the utility model adopts the following technical scheme:

an automatic shredder, comprising:

the paper shredding machine comprises a machine table, wherein a paper shredding cutter is arranged in the machine table;

the paper feeding board assembly is fixedly arranged on the machine table and positioned above the paper shredding cutter, and is used for bearing paper;

the paper guide assembly is rotatably arranged on the machine table and positioned above the paper shredding cutter, and can be switched between a closed state close to the paper feeding assembly and an open state far away from the paper feeding assembly;

the roller assembly is rotationally installed in the paper guide assembly, the roller assembly comprises a torsion spring, a support and a roller, one end of the support is rotationally connected with the paper guide assembly, the other end of the support is rotationally installed with the roller, one end of the torsion spring is abutted to the paper guide assembly, the other end of the torsion spring is abutted to the support, and the torsion spring is used for pushing one end of the support, which is provided with the roller, is abutted to paper on the paper feeding assembly.

As an alternative solution, the paper guide assembly includes:

the roller assembly is rotatably arranged on the lower cover, one side, close to the paper guide plate assembly, of the lower cover is provided with an avoidance opening, and the avoidance opening is used for avoiding the roller;

and the upper cover is detachably arranged above the lower cover.

As an optional solution, the paper guide assembly further includes:

the first transmission shaft is rotatably arranged on the machine table, the upper cover and the lower cover take the first transmission shaft as a rotation center, and a first gear is fixedly arranged on the periphery of the first transmission shaft;

the second transmission shaft is rotatably arranged on the lower cover, a second gear is fixedly arranged on the periphery of the second transmission shaft, the first gear is meshed with the second gear, and one end of the bracket is rotatably sleeved on the second transmission shaft;

the gear transmission group is rotatably arranged in the bracket, the gear transmission group is in transmission connection between the second transmission shaft and the idler wheel, and the idler wheel assembly and the gear transmission group take the second transmission shaft as a rotation center.

As an optional solution, the automatic shredder further includes:

the motor is arranged on the machine;

the gear driving group is rotatably arranged on the machine table and is in transmission connection between the output end of the motor and the first transmission shaft.

As an optional technical solution, the automatic paper shredder further includes a locking assembly, the locking assembly is mounted on the paper guide assembly, and the locking assembly includes:

the key is arranged on the upper cover, a supporting spring is arranged between the key and the upper cover, and the supporting spring is used for jacking the key;

the lock pin is slidably arranged on the lower cover and positioned below the key, a lock hole is formed in the side wall of the machine table, when the paper guide plate assembly is switched to a closed state, the lock pin is inserted into the lock hole, and the key is used for driving the lock pin to be separated from the lock hole;

the locking spring is arranged on the lower cover and used for pushing the lock pin to be inserted into the lock hole.

As an alternative solution, the paper feeding board assembly includes:

the paper feeding plate is arranged on the machine table and obliquely faces the roller assembly;

the bearing plate is arranged on the machine table and is inclined to deviate from the paper shredding cutter, the paper feeding plate is connected with the bearing plate to form a V-shaped structure, the paper feeding plate and the bearing plate enclose a containing cavity, and the paper is stored in the containing cavity.

As an optional solution, the paper feeding board assembly further includes:

the left guide plate is fixedly arranged at the left upper part of the paper shredding cutter and is positioned below the rotation center of the paper guide plate assembly;

the right side guide board, fixed set up in the upper right side of shredded paper cutter, just the right side guide board the top with the top butt of loading board, the left side guide board with form the paper feed passageway between the right side guide board, the paper feed passageway aim at shredded paper cutter, the paper feed passageway with hold the chamber intercommunication.

As an optional technical scheme, when the paper guide assembly is switched to a closed state, the paper guide assembly covers between the paper feeding channel and the accommodating cavity, and the side wall of the paper guide assembly facing the paper feeding channel and the accommodating cavity is a concave arc wall.

As an optional technical scheme, a plurality of raised strips are arranged at intervals on one side of the bearing plate facing the paper feeding plate.

As an optional technical scheme, the universal wheels are rotatably arranged at the bottom of the machine table.

The utility model has the beneficial effects that:

the utility model provides an automatic paper shredder, when paper is required to be shredded, a paper guide assembly is firstly switched to an open state, and because a roller assembly is arranged on the paper guide assembly, the roller assembly is far away from a paper feeding assembly and a machine table, stacked paper is placed on the paper feeding assembly, and then the paper guide assembly is switched to a closed state; when the paper joint is between gyro wheel and advance the cardboard subassembly, open the paper guide subassembly, the cardboard guide subassembly drives the gyro wheel subassembly and switches to the open mode, and the gyro wheel is kept away from and advances the cardboard subassembly to the operator takes out the card paper.

Drawings

The utility model is described in further detail below with reference to the drawings and examples;

FIG. 1 is a schematic view of a paper guide assembly of an automatic shredder according to an embodiment when the paper guide assembly is switched to a closed state;

FIG. 2 is a schematic view of a paper guide assembly of an automatic shredder according to an embodiment when the paper guide assembly is switched to an open state;

FIG. 3 is a cross-sectional view of a paper guide assembly of the auto shredder according to the embodiment when the paper guide assembly is switched to a closed state;

FIG. 4 is an enlarged view of a portion of the position A of FIG. 3;

FIG. 5 is a cross-sectional view of a paper guide assembly of an automatic shredder according to an embodiment when switched to an open state;

FIG. 6 is an enlarged view of a portion of the B position of FIG. 5;

FIG. 7 is a schematic view of a portion of a shredder according to an embodiment;

FIG. 8 is an exploded view of a portion of the structure of an automatic shredder according to an embodiment;

fig. 9 is a schematic view of a part of a structure of an automatic shredder according to an embodiment.

In the figure:

100. paper sheets;

1. a machine table; 11. a lock hole;

2. paper shredding cutters;

3. a paper feeding board assembly; 31. feeding paper boards; 32. a carrying plate; 321. a convex strip; 33. a receiving chamber; 34. a left guide plate; 35. a right guide plate; 36. a paper feed passage;

4. a paper guide assembly; 41. an upper cover; 42. a lower cover; 421. an avoidance port; 422. a concave arc wall; 43. a first drive shaft; 44. a first gear; 45. a second drive shaft; 46. a second gear; 47. a gear drive set;

5. a roller assembly; 51. a torsion spring; 52. a bracket; 53. a roller;

6. a motor;

7. a gear drive group;

8. a locking assembly; 81. a key; 82. a support spring; 83. a locking pin; 84. a locking spring;

9. and a universal wheel.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 9, the present embodiment provides an automatic shredder, which includes a machine table 1, a shredding cutter 2, a paper feeding assembly 3, a paper guiding assembly 4 and a roller assembly 5, wherein the shredding cutter 2 is installed inside the machine table 1; the paper feeding assembly 3 is fixedly arranged on the machine table 1 and is positioned above the paper shredding cutter 2, and the paper feeding assembly 3 is used for bearing paper 100; the paper guide assembly 4 is rotatably arranged on the machine table 1 and is positioned above the paper shredding cutter 2, and the paper guide assembly 4 can be switched between a closed state close to the paper feeding assembly 3 and an open state far away from the paper feeding assembly 3; the roller assembly 5 is rotatably mounted on the paper guide assembly 4, the roller assembly 5 comprises a torsion spring 51, a support 52 and a roller 53, one end of the support 52 is rotatably connected with the paper guide assembly 4, the roller 53 is rotatably mounted at the other end of the support 52, one end of the torsion spring 51 is abutted to the paper guide assembly 4, the other end of the torsion spring 51 is abutted to the support 52, and one end of the torsion spring 51, used for pushing the support 52, provided with the roller 53, is abutted to the paper 100 located on the paper feeding assembly 3.

Specifically, when paper shredding is needed, the paper guide assembly 4 is switched to an open state firstly, the roller assembly 5 is arranged on the paper guide assembly 4, so that the roller assembly 5 is far away from the paper feeding assembly 3 and the machine table 1, then the stacked paper 100 is placed on the paper feeding assembly 3, and then the paper guide assembly 4 is switched to a closed state, and as one end of the bracket 52 is rotationally connected with the paper guide assembly 4 and the bracket 52 is pushed by the torsion spring 51, the roller 53 rotationally arranged at the other end of the bracket 52 is ensured to be always pressed against the paper 100 positioned on the paper feeding assembly 3, the friction force of the roller 53 on the paper 100 is ensured until the paper 100 is separated from the paper feeding assembly 3 and enters the paper shredding cutter 2, so that the paper shredding cutter 2 shreds the paper 100; when the paper 100 is clamped between the roller 53 and the paper feeding component 3, the paper guiding component 4 is opened, the roller component 5 is driven by the paper guiding component 4 to switch to an open state, and the roller 53 is far away from the paper feeding component 3, so that an operator can take out the paper.

Since one end of the support 52 is rotatably connected to the paper guide assembly 4, a plurality of stacked sheets 100 can be simultaneously placed on the paper feed assembly 3, and the support 52 is urged by the torsion spring 51, when the first sheet 100 on the surface is conveyed to the paper shredding cutter 2 by the roller 53, the support 52 is urged by the torsion spring 51, the support 52 rotates by a predetermined angle, and the roller 53 presses the next sheet 100.

Optionally, the paper guide plate assembly 4 includes a lower cover 42 and a lower cover 42, the roller assembly 5 is rotatably installed on the lower cover 42, one side of the lower cover 42, which is close to the paper guide plate assembly 4, is provided with an avoidance opening 421, and the avoidance opening 421 is used for avoiding the roller 53; the upper cover 41 is detachably mounted above the lower cover 42.

When the paper 100 is caught in the escape opening 421 or the shredded paper dust passes through the escape opening 421 to enter the inside of the paper guide assembly 4, the operator can remove the upper cover 41 so as to clean the paper 100 and the paper dust inside the paper guide assembly 4.

When dust is adhered to the surface of the roller 53, the paper guide assembly 4 may be switched to an open state so that an operator can directly remove dust from the surface of the roller 53 at the avoiding opening 421, or the paper guide assembly 4 is switched to a closed state so that the operator can remove dust from the surface of the roller 53 after removing the upper cover 41.

Optionally, the paper guide plate assembly 4 further includes a first transmission shaft 43, a second transmission shaft 45, and a gear transmission group 47, where the first transmission shaft 43 is rotatably installed on the machine 1, the upper cover 41 and the lower cover 42 use the first transmission shaft 43 as a rotation center, and a first gear 44 is fixedly installed on the periphery of the first transmission shaft 43; the second transmission shaft 45 is rotatably arranged on the lower cover 42, a second gear 46 is fixedly arranged on the periphery of the second transmission shaft 45, the first gear 44 is meshed with the second gear 46, and one end of the bracket 52 is rotatably sleeved on the second transmission shaft 45; the gear transmission set 47 is rotatably installed inside the bracket 52, the gear transmission set 47 is in transmission connection between the second transmission shaft 45 and the roller 53, and the roller assembly 5 and the gear transmission set 47 take the second transmission shaft 45 as a rotation center.

When the paper guide assembly 4 is switched between the closed state and the open state, the paper guide assembly 4 and the roller assembly 5 both rotate by taking the central axis of the first transmission shaft 43 as a rotation central line, and when the thickness of the stacked paper 100 is changed, the position of the paper guide assembly 4 is unchanged, and the roller assembly 5 rotates by taking the central axis of the second transmission shaft 45 as the rotation central line; the power for driving the roller 53 to rotate relative to the bracket 52 is sequentially transmitted by the first transmission shaft 43, the first gear 44, the second gear 46, the second transmission shaft 45 and the gear transmission group 47; the gear transmission group 47 is arranged in the bracket 52, and the bracket 52 isolates and protects the gear transmission group 47, so that the gear transmission group 47 can be prevented from being blocked by paper 100 or paper scraps; the gear transmission group 47 is composed of a plurality of gears, the gears of the gear transmission group 47 are rotatably arranged in the bracket 52, the paper guide plate assembly 4 synchronously rotates along with the bracket 52 in the switching and opening state process, the gears are prevented from generating relative offset, and gaps are avoided.

In this embodiment, the body of the torsion spring 51 is sleeved on the outer periphery of the second transmission shaft 45.

Optionally, the automatic paper shredder further comprises a motor 6 and a gear driving group 7, wherein the motor 6 is arranged on the machine table 1; the gear driving set 7 is rotatably installed on the machine 1, and the gear driving set 7 is in transmission connection between the output end of the motor 6 and the first transmission shaft 43.

The gear driving set 7 is composed of a plurality of gears, the output end of the motor 6 and the periphery of the first transmission shaft 43 are both provided with gears, and the motor 6 drives the first transmission shaft 43 through the gear driving set 7, so that the roller 53 brings the paper 100 into the paper shredding cutter 2.

Optionally, the automatic paper shredder further comprises a locking component 8, the locking component 8 is mounted on the paper guide board component 4, the locking component 8 comprises a key 81, a lock pin 83 and a locking spring 84, the key 81 is arranged on the upper cover 41, a supporting spring 82 is arranged between the key 81 and the upper cover 41, and the supporting spring 82 is used for jacking the key 81; the lock pin 83 is slidably mounted on the lower cover 42 and located below the key 81, the side wall of the machine table 1 is provided with a lock hole 11, when the paper guide plate assembly 4 is switched to the closed state, the lock pin 83 is inserted into the lock hole 11, and the key 81 is used for driving the lock pin 83 to be separated from the lock hole 11; a locking spring 84 is mounted on the lower cover 42, and the locking spring 84 is used for pushing the lock pin 83 to be inserted into the lock hole 11.

The locking spring 84 drives the lock pin 83 to be inserted into the lock hole 11, so that the paper guide assembly 4 is kept in a closed state, when the paper guide assembly 4 needs to be switched to an open state, the key 81 is pressed, the key 81 toggles the lock pin 83, the lock pin 83 is separated from the lock hole 11, and an operator can turn over and open the paper guide assembly 4 at the moment. The principle of the structure of using the key 81 to toggle the lock pin 83 is the prior art, and the description of this embodiment is omitted.

Optionally, the paper feeding board assembly 3 includes a paper feeding board 31 and a bearing board 32, and the paper feeding board 31 is disposed on the machine table 1 and faces the roller assembly 5 obliquely; the bearing plate 32 is arranged on the machine table 1 and is inclined away from the paper shredding cutter 2, the paper feeding plate 31 is connected with the bearing plate 32 to form a V-shaped structure, the paper feeding plate 31 and the bearing plate 32 enclose a containing cavity 33, and the paper 100 is stored in the containing cavity 33.

When the stacked sheets 100 are placed in the accommodating chamber 33, the paper feeding plate 31 supports the back surface of the sheets 100, the bearing plate 32 supports the bottom edge of the sheets 100, and the paper feeding plate 31 and the bearing plate 32 are connected to form a V-shaped structure, so that the rollers 53 are beneficial to bringing the sheets 100 into the paper shredding cutter 2.

Optionally, the paper feeding board assembly 3 further includes a left guiding board 34 and a right guiding board 35, the left guiding board 34 is fixedly arranged at the upper left of the paper shredding cutter 2, and the left guiding board 34 is positioned below the rotation center of the paper guiding board assembly 4; the right side guide board 35 is fixed to be set up in the upper right side of shredding cutter 2, and the top of right side guide board 35 and the top butt of loading board 32, form paper feed passageway 36 between left side guide board 34 and the right side guide board 35, and paper feed passageway 36 aligns shredding cutter 2, and paper feed passageway 36 communicates with holding chamber 33.

The left guide plate 34 is arranged below the rotation center of the paper guide plate assembly 4, if the rotation center of the paper guide plate assembly 4 is subjected to vertical downward external force, the left guide plate 34 can also support the paper guide plate assembly 4, so that the power output by the motor 6 to the roller 53 is prevented from being disturbed due to the fact that the acting force is completely applied to the first transmission shaft 43; the roller 53 rubs the paper 100 in the accommodating cavity 33 into the paper feeding channel 36, the paper shredding cutter 2 shreds the paper 100 at the bottom of the paper feeding channel 36, and paper scraps are not easy to reversely pass through the paper feeding channel 36, so that the paper scraps are prevented from falling into the accommodating cavity 33 or entering the inside of the paper guiding assembly 4.

Optionally, when the paper guide assembly 4 is switched to the closed state, the paper guide assembly 4 covers between the paper feeding channel 36 and the accommodating cavity 33, and the side wall of the paper guide assembly 4 facing the paper feeding channel 36 and the accommodating cavity 33 is a concave arc wall 422. The paper feeding plate 31 and the bearing plate 32 are connected to form a V-shaped structure, when the roller 53 rubs and stirs the paper 100, the paper 100 is bent into a V shape and then is abutted against the concave arc wall 422, and the concave arc wall 422 guides the paper 100 to the paper feeding channel 36, so that the paper 100 can be conveyed smoothly.

Optionally, a plurality of raised strips 321 are disposed on a side of the carrier 32 facing the paper feeding board 31 at intervals, and the rollers 53 push the paper 100 to the raised strips 321, so as to facilitate separating the stacked paper 100 one by one.

Optionally, the bottom of the machine table 1 is rotatably provided with a universal wheel 9, so that the automatic shredder can be conveniently transferred and carried.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. An automatic shredder, comprising:

the paper shredding machine comprises a machine table (1), wherein a paper shredding cutter (2) is arranged in the machine table (1);

the paper feeding assembly (3) is fixedly arranged on the machine table (1) and is positioned above the paper shredding cutter (2), and the paper feeding assembly (3) is used for bearing paper (100);

the paper guide assembly (4) is rotatably arranged on the machine table (1) and is positioned above the paper shredding cutter (2), and the paper guide assembly (4) can be switched between a closed state close to the paper feeding assembly (3) and an open state far away from the paper feeding assembly (3);

the paper feeding device comprises a paper guide assembly (4), a roller assembly (5) and a torsion spring (51), a support (52) and a roller (53), wherein the roller assembly (4) is rotatably mounted on the roller assembly, one end of the support (52) is rotatably connected with the paper guide assembly (4), the roller (53) is rotatably mounted on the other end of the support (52), one end of the torsion spring (51) is abutted to the paper guide assembly (4), the other end of the torsion spring (51) is abutted to the support (52), and the torsion spring (51) is used for pushing one end of the support (52), on which the roller (53) is mounted, to be located on the paper feeding assembly (3).

2. The automatic paper shredder according to claim 1, wherein the paper guide assembly (4) comprises:

the roller assembly (5) is rotatably arranged on the lower cover (42), an avoidance opening (421) is formed in one side, close to the paper guide plate assembly (4), of the lower cover (42), and the avoidance opening (421) is used for avoiding the roller (53);

and an upper cover (41) detachably mounted above the lower cover (42).

3. The automatic paper shredder according to claim 2, wherein the paper guide assembly (4) further comprises:

the first transmission shaft (43) is rotatably arranged on the machine table (1), the upper cover (41) and the lower cover (42) take the first transmission shaft (43) as a rotation center, and a first gear (44) is fixedly arranged on the periphery of the first transmission shaft (43);

the second transmission shaft (45) is rotatably arranged on the lower cover (42), a second gear (46) is fixedly arranged on the periphery of the second transmission shaft (45), the first gear (44) is meshed with the second gear (46), and one end of the bracket (52) is rotatably sleeved on the second transmission shaft (45);

the gear transmission group (47) is rotatably arranged in the bracket (52), the gear transmission group (47) is in transmission connection between the second transmission shaft (45) and the roller (53), and the roller assembly (5) and the gear transmission group (47) take the second transmission shaft (45) as a rotation center.

4. The automatic shredder of claim 3, further comprising:

a motor (6) mounted on the machine (1);

the gear driving group (7) is rotatably arranged on the machine table (1), and the gear driving group (7) is in transmission connection between the output end of the motor (6) and the first transmission shaft (43).

5. The automatic paper shredder according to claim 2, further comprising a locking assembly (8), the locking assembly (8) being mounted to the paper guide assembly (4), the locking assembly (8) comprising:

the key (81), the key (81) is arranged on the upper cover (41), a supporting spring (82) is arranged between the key (81) and the upper cover (41), and the supporting spring (82) is used for jacking the key (81);

the lock pin (83), the lock pin (83) is slidably mounted on the lower cover (42) and is located below the key (81), a lock hole (11) is formed in the side wall of the machine table (1), when the paper guide plate assembly (4) is switched to a closed state, the lock pin (83) is inserted into the lock hole (11), and the key (81) is used for driving the lock pin (83) to be separated from the lock hole (11);

and the locking spring (84) is arranged on the lower cover (42), and the locking spring (84) is used for pushing the lock pin (83) to be inserted into the lock hole (11).

6. The automatic shredder according to claim 1, wherein the paper feeding assembly (3) comprises:

a paper feeding plate (31) arranged on the machine table (1) and obliquely facing the roller assembly (5);

the bearing plate (32) is arranged on the machine table (1) and is inclined to deviate from the paper shredding cutter (2), the paper feeding plate (31) is connected with the bearing plate (32) to form a V-shaped structure, the paper feeding plate (31) and the bearing plate (32) enclose a containing cavity (33), and the paper (100) is stored in the containing cavity (33).

7. The automatic paper shredder according to claim 6, wherein the paper feeding assembly (3) further comprises:

a left guide plate (34) fixedly arranged at the upper left of the paper shredding cutter (2), and the left guide plate (34) is positioned below the rotation center of the paper guide plate assembly (4);

the right side guide board (35), fixed set up in the upper right side of shredded paper cutter (2), just the top of right side guide board (35) with the top butt of loading board (32), left side guide board (34) with form paper feed passageway (36) between right side guide board (35), paper feed passageway (36) aim at shredded paper cutter (2), paper feed passageway (36) with hold chamber (33) intercommunication.

8. The automatic paper shredder according to claim 7, wherein when the paper guide assembly (4) is switched to the closed state, the paper guide assembly (4) is covered between the paper feeding channel (36) and the accommodating cavity (33), and the side wall of the paper guide assembly (4) facing the paper feeding channel (36) and the accommodating cavity (33) is a concave arc wall (422).

9. The automatic paper shredder according to claim 6, wherein a plurality of raised strips (321) are arranged at intervals on one side of the bearing plate (32) facing the paper feeding plate (31).

10. An auto shredder according to claim 1, characterised in that the base of the machine table (1) is rotatably fitted with a universal wheel (9).