Paper shredder

Abstract

The utility model provides a paper shredder and belongs to the technical field of office supplies. The paper shredding device solves the problem that paper conveying is not smooth when a large amount of paper is placed at a time for batch paper shredding. The paper shredder comprises a machine shell with a paperboard cleaning window, a paper cleaning turning plate hinged to the interior of the paperboard cleaning window and a paper supporting plate with the rear end hinged to the interior of the machine shell, a paper twisting wheel is arranged in the machine shell, the front end of the paper supporting plate is located below the paper twisting wheel, and a supporting spring acting on the bottom of the front end of the paper supporting plate is arranged in the machine shell. The pressing base is provided with a top plate and two side plates, the two side plates are fixedly connected to the paper supporting plate, the two side plates are oppositely arranged in the left-right direction and located on the left side edge and the right side edge of the paper supporting plate respectively, and the top plate is fixedly connected between the upper ends of the two side plates. The pressing base is partially located in the paperboard cleaning window and located behind the paper cleaning turning plate. The paper shredder has the advantages that the paper can be smoothly conveyed when a large amount of paper is placed at a time to be shredded in batches, and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of office supplies and relates to a paper shredder. Background Art

[0002] A paper shredder is a commonly used office equipment used to shred discarded documents. Traditional paper shredders only have a manual paper feeding and shredding function, where the user manually puts one or several sheets of paper into the shredder for shredding. In order to achieve batch automatic shredding, the applicant has proposed a paper shredder with patent application number 202322643358.3, which includes a housing with a paper jam cleaning window on the top and a paper cleaning flap hinged at the front end in the paper jam cleaning window. A shockproof structure is provided between the paper cleaning flap and the housing. A paper support plate is provided below the paper jam cleaning window in the housing. The rear end of the paper support plate is tilted upward relative to the front end. A paper pickup roller is connected to the front end of the paper support plate in the housing through a mounting shaft. A spring is provided at the bottom of the front end of the paper support plate to make contact between the upper side of the front end of the paper support plate and the rear lower side of the paper pickup roller. A paper guide channel is also provided in the housing. The paper pickup roller is located at the entrance of the paper guide channel and the front end of the paper support plate is connected to the entrance of the paper guide channel. A knife assembly is provided at the exit of the paper guide channel. When shredding paper in batches, place the entire stack of paper on the paper support plate, and the rotating paper pickup wheel uses friction to feed the topmost paper through the paper guide channel into the knife assembly for shredding. When a paper jam occurs, the user can flip open the paper clearing flap and then clear the jam from the paper jam cleaning window. In addition, the shredder is also equipped with a long strip-shaped limit plate in the casing. The length direction of the limit plate is arranged along the left and right directions of the casing, and the two ends of the limit plate are fixedly connected to the casing. The rear end of the paper clearing flap rests on the limit plate when there is no need to clean the paper. When someone inserts their hand into the machine through the paper jam cleaning window, they will not be able to touch the paper clearing flap due to the obstruction of the limit plate, so as to ensure that the paper clearing flap will not be pushed open at will.

[0003] For batches of paper, the ideal state is that after the entire stack of paper is placed on the paper support and pushed forward, the front end of the top paper rests against the lower rear part of the pickup roller. At this time, the pickup roller is pressed against the front end of the top paper, so that when the pickup roller rotates, the friction force can smoothly feed the top paper forward. If a large amount of paper is put in at one time for batch shredding, after the entire stack of paper is placed on the paper support and pushed forward, the front end of the top paper rests against the middle rear part of the pickup roller. In this case, since the pickup roller is not pressed against the front end of the top paper, it is possible that the top paper will be pushed backward when the pickup roller rotates, resulting in uneven paper feeding. Utility Model Content

[0004] The object of the present utility model is to address the above problems existing in the prior art, and a paper shredder is proposed, which solves the problem of unsmooth paper conveyance when a relatively large number of papers are placed at one time for batch shredding.

[0005] The object of the present utility model can be achieved by the following technical solutions:

[0006] A paper shredder, comprising a housing with a paper jamming cleaning window at the top, a paper cleaning flap hinged at the front end within the paper jamming cleaning window, and a paper supporting plate hinged at the rear end within the housing. A paper feeding roller is arranged within the housing below the paper cleaning flap, and the front end of the paper supporting plate is located below the paper feeding roller. A supporting spring acting on the bottom of the front end of the paper supporting plate is provided within the housing. It is characterized in that the paper shredder further comprises a pressing seat, the pressing seat having a top plate and two side plates. The two side plates are fixedly connected to the paper supporting plate, the two side plates are arranged opposite to each other in the left-right direction and are respectively located at the left and right side edges of the paper supporting plate, the top plate is fixedly connected between the upper ends of the two side plates, and a part of the pressing seat is located within the paper jamming cleaning window and behind the paper cleaning flap.

[0007] When the number of papers for batch shredding is not large, the user can directly place the whole stack of papers on the paper supporting plate and push them forward. The front end of the topmost paper will abut against the lower rear part of the paper feeding roller. At this time, the paper feeding roller is pressing on the front end of the topmost paper, and when the paper feeding roller rotates, the paper can be smoothly sent forward by means of friction. When the number of papers for batch shredding is relatively large, if the whole stack of papers is placed on the paper supporting plate and pushed forward, the front end of the topmost paper abuts against the middle rear part of the paper feeding roller. In this state, since the paper feeding roller is not pressing on the front end of the topmost paper, there may be a situation where the paper feeding roller pushes the topmost paper backward when rotating, resulting in the paper not being able to be smoothly sent forward. In response to this situation, the user can first take out the whole stack of papers from the paper supporting plate, and then directly press downward from the top plate of the pressing seat with the hand. Because the pressing seat is fixedly connected to the paper supporting plate, the front end of the paper supporting plate will swing downward against the action of the supporting spring. In this way, the gap between the upper side of the front end of the paper supporting plate and the bottom of the paper feeding roller will become larger. Then, place this stack of papers on the paper supporting plate and push them forward. At this time, the front end of the topmost paper will abut against the lower rear part of the paper feeding roller and form a state of being pressed by the paper feeding roller. Thus, when the paper feeding roller rotates, the topmost paper can be smoothly sent forward by using the friction force.

[0008] This shredder is provided with a pressing seat fixedly connected to the paper support board. The pressing seat has a top plate and two side plates, presenting a U-shaped configuration, which will not impede the normal placement of paper on the paper support board. At the same time, it enables users to directly press the pressing seat to change the gap between the front end of the paper support board and the bottom of the paper feed roller, thereby ensuring that when a relatively large number of papers are placed at one time for batch shredding, the papers can be smoothly conveyed. Moreover, the pressing seat is fixedly connected to the paper support board and is located behind the paper cleaning flap. In this way, when the user inserts their hand into the machine through the paper jam cleaning window, they will not be able to touch the paper cleaning flap due to the presence of the pressing seat, making it not easy for the paper cleaning flap to be accidentally pushed open. That is to say, the pressing seat also has the function of protecting the paper cleaning flap from being accidentally pushed open. Therefore, the pressing seat serves two purposes.

[0009] In practice, although a support spring is provided at the bottom of the front end of the paper support board, the front end of the paper support board can be pressed directly to compress the support spring and swing downward, increasing the gap between it and the bottom of the paper feed roller. However, when pressing on the paper support board with the hand, it makes it impossible to place the paper normally.

[0010] In the above-mentioned shredder, the top plate has a first plate body and a second plate body connected to the rear end of the first plate body. The second plate body is inclined relative to the first plate body, the second plate body is parallel to the paper support board, and the distance between the first plate body and the paper support board gradually increases from the rear to the front.

[0011] In practice, the front end of the paper support board is inclined downward relative to the rear end. The second plate body is parallel to the paper support board, which means that the front end of the second plate body is also inclined downward relative to the rear end. And the second plate body is connected to the rear end of the first plate body, and the distance between the first plate body and the paper support board gradually increases from the rear to the front, which means that in the case where the front end of the second plate body is inclined downward, the first plate body is horizontally arranged or the front end of the first plate body is inclined upward relative to its rear end. Such a state is more conducive to the user applying force by pressing, and thus can be operated more easily.

[0012] In the above-mentioned shredder, the first plate body has a concave pit recessed downward from its upper surface, and the bottom surface of the concave pit is an arc surface.

[0013] The concave pit provides a position for the user's finger to apply force; the bottom surface of the concave pit being an arc surface better conforms to the shape of the user's finger, improving the force-bearing condition of the user's finger.

[0014] In the above-mentioned shredder, the top plate also has a flanging fixedly connected to the front end of the first plate body and facing downward. The two ends of the flanging in the left-right direction are respectively fixedly connected to the two side plates, and several reinforcing ribs are fixedly connected between the rear side surface of the flanging and the lower surface of the first plate body.

[0015] The setting of the flanging and the reinforcing ribs can increase the strength and ensure that the top plate is not easily deformed after long-term and frequent pressing.

[0016] In the above-mentioned shredder, a sheet-shaped operation part protrudes from the rear end of the paper cleaning flap, and the front end of the first plate body is located below the operation part and there is a gap between them.

[0017] The sheet-shaped operation part is provided to facilitate the user to lift the paper cleaning flap for paper cleaning work. Moreover, the front end of the first plate body is located below the operation part and there is a gap between them, so that the two are misaligned to avoid jamming each other.

[0018] In the above-mentioned shredder, sheet-shaped parts protrude from the opposite sides of the lower ends of the two side plates respectively, and the two sheet-shaped parts abut against the paper supporting plate, and the side plates and the paper supporting plate are fixed by fastening screws passing through the sheet-shaped parts.

[0019] The sheet-shaped parts can increase the contact area between the side plates and the paper supporting plate, and ensure that the two side plates can better bear the acting force when the user presses the pressing seat downward.

[0020] In the above-mentioned shredder, a positioning head protrudes from the lower surface of the sheet-shaped part, and the paper supporting plate is provided with a positioning hole, and the positioning head is inserted into the positioning hole.

[0021] The setting of the positioning head and the positioning hole can realize quick positioning when the pressing seat and the paper supporting plate are fixedly connected.

[0022] Compared with the prior art, the present shredder is provided with a pressing seat and fixedly connected to the paper supporting plate. The pressing seat has a top plate and two side plates and is in a U-shaped shape, so that it will not hinder the normal placement of the paper on the paper supporting plate. At the same time, the user can directly press the pressing seat to change the gap between the front end of the paper supporting plate and the bottom of the paper feeding roller, so as to ensure that the paper can be smoothly conveyed when a large number of papers are put in at one time for batch shredding.

[0023] In addition, the pressing seat is fixedly connected to the paper supporting plate and is located behind the paper cleaning flap. When the user inserts the hand into the machine from the paper jamming cleaning window, the paper cleaning flap cannot be touched because of the existence of the pressing seat, so that the paper cleaning flap is not easily pushed open accidentally. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional schematic diagram of the present shredder.

[0025] Figure 2 is a cross-sectional view of the present shredder.

[0026] Figure 3 is an exploded schematic diagram of the present shredder.

[0027] Figure 4 is an exploded schematic diagram of the present shredder from another angle.

[0028] Figure 5 It is a schematic connection diagram between the pressing seat and the paper supporting board.

[0029] Figure 6 It is a three-dimensional schematic diagram of the pressing seat.

[0030] Figure 7 It is a three-dimensional schematic diagram of the pressing seat from another angle.

[0031] In the figure, 1 is the machine shell; 1a is the upper shell; 1a1 is the paper jam cleaning window; 1a2 is the manual paper feeding port; 1b is the lower shell; 1c is the bracket; 1c1 is the paper guiding channel; 1c2 is the paper passing channel; 2 is the paper cleaning flap; 2a is the operation part; 3 is the paper supporting board; 4 is the paper feeding roller; 5 is the supporting spring; 6 is the cutter group assembly; 6a is the outer shell; 6a1 is the paper feeding port; 6b is the blade; 7 is the driving motor; 8 is the pressing seat; 8a is the side plate; 8a1 is the sheet part; 8a2 is the positioning head; 8a3 is the columnar part; 8a4 is the mounting hole; 8b is the top plate; 8b1 is the first plate body; 8b11 is the pit; 8b2 is the second plate body; 8b3 is the flanging; 8b4 is the reinforcing rib. Specific embodiments

[0032] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0033] Such as Figure 1 、 Figure 2 、 Figure 3 And Figure 4The shredder shown in FIG. 1 includes a housing 1 with a paper-clearing window 1a1 at its top and a paper-clearing flap 2 hingedly connected to the paper-clearing window 1a1 at its front end. Shock-absorbing positioning structures are provided on the left and right sides of the paper-clearing flap 2 and the housing 1. These structures comprise grooves on the left and right sides of the paper-clearing flap 2 and elastic protrusions on the inner walls of the paper-clearing window 1a1 on both sides (the grooves and elastic protrusions are not shown in the figure). The elastic protrusions are located within the grooves. A paper-supporting plate 3 is provided within the housing 1, the rear end of which is hingedly connected to the housing 1. A paper-pickup roller 4 is also connected to the housing 1 via a rotating shaft. The paper-pickup roller 4 is located below the paper-clearing flap 2, with the front end of the paper-pickup roller 3 positioned below and behind the paper-pickup roller 4. A support spring 5 is provided within the housing 1, the upper end of which acts on the front bottom of the paper-pickup plate 3. A paper-guide channel 1c1 is provided within the housing 1. The paper-pickup roller 4 is located at the entrance of the paper-guide channel 1c1, with the front end of the paper-pickup plate 3 aligned with the entrance of the paper-guide channel 1c1. The housing 1 houses a blade assembly 6. This assembly comprises a housing 6a, a blade shaft rotatably mounted within the housing 6a, and a blade 6b fixed to the shaft. The top of the housing 6a has a paper inlet 6a1, and the outlet of a paper guide 1c1 communicates with the paper inlet 6a1 of the blade assembly 6. The top of the housing 1 also features a manual paper feed opening 1a2 extending horizontally. Directly below the manual paper feed opening 1a2 is a vertically positioned paper feed passage 1c2 within the housing 1. The paper feed passage 1c2 is positioned vertically, with the blade assembly 6 positioned below it. The outlet of the paper feed passage 1c2 communicates with the paper inlet 6a1 of the blade assembly 6. A drive motor 7 is also housed within the housing 1. The output shaft of the drive motor 7, through a gear mechanism, simultaneously drives the blade shaft and the rotating shaft.

[0034] In this embodiment, if Figure 2 、 Figure 3 and Figure 4 As shown, the casing 1 includes an upper shell 1a, a lower shell 1b and a bracket 1c. The upper shell 1a and the lower shell 1b are fixedly connected by fasteners. The bracket 1c is fixedly connected to the lower shell 1b. The knife group assembly 6, the paper support board 3 and the paper pickup roller 4 are all connected to the bracket 1c. The lower end of the support spring 5 rests on the bracket 1c, and the paper feeding channel 1c2 and the paper guiding channel 1c1 are both provided on the bracket 1c. The paper jam cleaning window 1a1 and the manual paper release port 1a2 are provided on the upper shell 1a.

[0035] Furthermore, if Figure 2 、 Figure 5 、 Figure 6 and Figure 7As shown in the figure, the shredder further includes a pressing seat 8. The pressing seat 8 has a top plate 8b and two side plates 8a. The two side plates 8a are fixedly connected to the paper support plate 3. The two side plates 8a are arranged opposite to each other in the left-right direction and are respectively located at the left and right side edges of the paper support plate 3. The top plate 8b is fixedly connected between the upper ends of the two side plates 8a. In practice, the top plate 8b and the two side plates 8a are of an integral structure. Part of the pressing seat 8 is located within the paper jamming cleaning window 1a1 and behind the paper cleaning flap 2. Specifically, the top plate 8b has a first plate body 8b1 and a second plate body 8b2 connected to the rear end of the first plate body 8b1. The second plate body 8b2 is inclined relative to the first plate body 8b1, and the second plate body 8b2 is parallel to the paper support plate 3. The distance between the first plate body 8b1 and the paper support plate 3 gradually increases from front to back. In this embodiment, the first plate body 8b1 is substantially parallel to the top surface of the housing 1. The first plate body 8b1 has a concave pit 8b11 recessed downward from its upper surface, and the bottom surface of the concave pit 8b11 is an arc surface. The top plate 8b further has a flanging 8b3 fixedly connected to the front end of the first plate body 8b1 and extending downward. The two ends of the flap in the left-right direction are respectively fixedly connected to the two side plates 8a. A plurality of reinforcing ribs 8b4 are fixedly connected between the rear side surface of the flap and the lower surface of the first plate body 8b1. The rear end of the paper cleaning flap 2 protrudes with a sheet-shaped operating portion 2a. The front end of the first plate body 8b1 is located below the operating portion 2a and there is a gap between them. Specifically, the limiting member is a plastic part. On the opposite sides of the lower ends of the two side plates 8a, there are respectively protruding sheet-shaped portions 8a1. The two sheet-shaped portions 8a1 abut against the paper support plate 3. The lower surface of the sheet-shaped portion 8a1 protrudes with a positioning head 8a2. The paper support plate 3 is provided with positioning holes, and the positioning head 8a2 is inserted into the positioning holes. An integral columnar portion 8a3 is fixedly connected between the upper surface of the sheet-shaped portion 8a1 and the side surface of the corresponding side plate 8a. The columnar portion 8a3 has a mounting hole 8a4, and the mounting hole 8a4 penetrates the lower surface of the sheet-shaped portion 8a1. The side plate 8a and the paper support plate 3 are fixed by a fastening screw whose rod portion passes upward through the paper support plate 3 and is threadedly connected into the mounting hole 8a4. Through the cooperation of the positioning head 8a2 and the positioning holes, rapid positioning of the pressing seat 8 and the paper support plate 3 can be achieved before fixed connection, and then the pressing seat 8 and the paper support plate 3 are fixedly connected together by using the fastening screw to pass through the corresponding hole positions on the paper support plate 3 and be threadedly connected into the mounting hole 8a4.

[0036] When only one or a few sheets of paper need to be shredded, the user directly puts the paper into the casing 1 from the manual paper feed slot 1a2 and enters the cutter group assembly 6 through the paper channel 1c2 for shredding. When a batch of paper needs to be shredded, the user stacks the batch of paper into a stack and places it on the paper support plate 3 and pushes the paper forward until the front end of the paper contacts the paper feed roller 4. When the paper feed roller 4 rotates, the paper feed roller 4 will send the topmost paper forward by friction, so that the paper enters the cutter group assembly 6 through the paper guide channel 1c1 for shredding. When a paper jam occurs during batch shredding, the user can open the paper cleaning flap 2 and then pull out the jammed paper from the paper jam cleaning window 1a1. Moreover, the pressing seat 8 is fixedly connected to the paper support plate 3 and is located behind the paper cleaning flap 2. In this way, when the user inserts the hand into the machine from the paper jam cleaning window 1a1, the paper cleaning flap 2 cannot be touched due to the existence of the pressing seat 8, making it difficult for the paper cleaning flap 2 to be accidentally pushed open. Thus, the situation where the function of the shock-proof positioning structure is weakened due to the paper cleaning flap 2 being frequently accidentally lifted can be eliminated, thereby ensuring the reliability of the use of this shredder.

[0037] In practice, there are two situations during batch shredding. In one situation, after the whole stack of paper is placed on the paper support plate 3 and pushed forward, the front end of the topmost paper abuts against the lower rear part of the paper feed roller 4. At this time, the paper feed roller 4 presses on the front end of the topmost paper. When the paper feed roller 4 rotates, the paper can be smoothly sent forward by friction. There is also another situation. After the whole stack of paper is placed on the paper support plate 3 and pushed forward, the front end of the topmost paper abuts against the middle rear part of the paper feed roller 4. In this state, since the paper feed roller 4 does not press on the front end of the topmost paper, when the paper feed roller 4 rotates, it may push the topmost paper backward, resulting in the paper not being able to be smoothly sent forward. For the second situation, the user can first take out the whole stack of paper from the paper support plate 3, and then directly press downward with the hand from the top plate 8b at the top of the pressing seat 8. Because the pressing seat 8 is fixedly connected to the paper support plate 3, the front end of the paper support plate 3 will swing downward against the action of the support spring 5. In this way, the gap between the upper side of the front end of the paper support plate 3 and the bottom of the paper feed roller 4 will become larger. Then, place this stack of paper on the paper support plate 3 and push it forward. At this time, the front end of the topmost paper will abut against the lower rear part of the paper feed roller 4 to form a state of being pressed by the paper feed roller 4. Thus, when the paper feed roller 4 rotates, the topmost paper can be smoothly sent forward by friction.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A paper shredder, comprising a housing (1) with a paper jam cleaning window (1a1) at the top, a paper cleaning flap (2) whose front end is hinged inside the paper jam cleaning window (1a1), and a paper supporting board (3) whose rear end is hinged inside the housing (1). A paper feeding roller (4) is arranged inside the housing (1) below the paper cleaning flap (2). The front end of the paper supporting board (3) is located below the paper feeding roller (4). A supporting spring (5) acting on the bottom of the front end of the paper supporting board (3) is arranged inside the housing (1). It is characterized in that, The shredder further includes a pressing seat (8). The pressing seat (8) has a top plate (8b) and two side plates (8a). The two side plates (8a) are fixedly connected to the paper support plate (3). The two side plates (8a) are arranged oppositely in the left-right direction and are respectively located at the left and right side edges of the paper support plate (3). The top plate (8b) is fixedly connected between the upper ends of the two side plates (8a). The pressing seat (8) is partially located within the paper jamming cleaning window (1a1) and is behind the paper cleaning flap (2).

2. The shredder according to claim 1, characterized in that, The top plate (8b) has a first plate body (8b1) and a second plate body (8b2) connected to the rear end of the first plate body (8b1). The second plate body (8b2) is inclined relative to the first plate body (8b1). The second plate body (8b2) is parallel to the paper support plate (3). The distance between the first plate body (8b1) and the paper support plate (3) gradually increases from the rear to the front.

3. The shredder according to claim 2, characterized in that, The first plate body (8b1) has a concave pit (8b11) recessed downward from its upper surface. The bottom surface of the concave pit (8b11) is an arc surface.

4. The shredder according to claim 2, characterized in that, The top plate (8b) further has a flanging (8b3) fixedly connected to the front end of the first plate body (8b1) and disposed downward. The two ends of the flanging (8b3) in the left-right direction are respectively fixedly connected to the two side plates (8a). A plurality of reinforcing ribs (8b4) are fixedly connected between the rear side surface of the paper cleaning flap and the lower surface of the first plate body (8b1).

5. The shredder according to claim 2 or 3 or 4, characterized in that, A sheet-like operation portion (2a) protrudes from the rear end of the paper cleaning flap (2). The front end of the first plate body (8b1) is located below the operation portion (2a) and there is a gap between them.

6. The shredder according to claim 1, characterized in that, Sheet-like portions (8a1) protrude from the opposite sides of the lower ends of the two side plates (8a). The two sheet-like portions (8a1) abut against the paper support plate (3). The side plates (8a) and the paper support plate (3) are fixed by fastening screws passing through the sheet-like portions (8a1).

7. The shredder according to claim 6, characterized in that, A positioning head (8a2) protrudes from the lower surface of the sheet-like portion (8a1). The paper support plate (3) is provided with a positioning hole. The positioning head (8a2) is inserted into the positioning hole.

Images