CN110961214A - Paper shredder - Google Patents
Paper shredder Download PDFInfo
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- CN110961214A CN110961214A CN201811147362.8A CN201811147362A CN110961214A CN 110961214 A CN110961214 A CN 110961214A CN 201811147362 A CN201811147362 A CN 201811147362A CN 110961214 A CN110961214 A CN 110961214A
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- paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
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Abstract
The invention relates to a paper shredder, which comprises an upper cover, a paper shredding box, a compression mechanism and a water tank, wherein the upper cover is provided with a paper shredding box; the upper cover is covered on the paper shredding box and is connected with the compression mechanism, and the water tank is positioned at the bottom of the paper shredding box; the top of the shredded paper box is provided with an opening; the upper cover is provided with a paper inlet, a rotary blade, a driving motor and a controller; the compression mechanism comprises a pressing driving mechanism and a compression plate; the pressing driving mechanism is positioned on the top surface of the upper cover; the compression plate is located in the inner cavity of the shredded paper box and is inclined relative to the horizontal plane. The outer wall of the water tank is tightly attached to the inner wall of the shredded paper box, and the top of the water tank is provided with an opening. The paper shredder has the advantages of effectively compressing shredded paper in the paper shredder, increasing the accommodating space of the paper shredder, reducing the cleaning frequency of the paper shredder, improving the paper shredding efficiency and improving the user experience.
Description
Technical Field
The invention relates to the field of office supplies, in particular to a paper shredder.
Background
The shredder is mainly composed of a group of rotating blades and a driving motor. The paper is fed from the middle of the mutually meshed blades and is divided into a plurality of small paper sheets so as to achieve the purpose of confidentiality. The paper shredding mode refers to a shape of paper shredded by a shredder after the paper is processed by the shredder. According to the composition mode of the paper shredding knife, the existing paper shredding mode comprises the following steps: crushed, granular, segmented, foamed, striped, filamentous, and the like.
Referring to fig. 1, the prior art discloses a shredder including a top cover x1 and a shredder box x 2. The upper cover x1 is arranged at the opening at the top of the shredded paper box x2 in a covering manner, and the upper cover x1 is provided with a paper inlet x11 communicated with the inner cavity of the shredded paper box x2, a group of rotary blades and combs arranged at the paper inlet x11, and a driving motor in driving connection with the rotary blades. When shredding paper, the drive motor drives the rotary blade to rotate and cut, and paper placed at the paper inlet x11 is rotated and cut by the rotary blade to form a segment of shredded paper, and the segment of shredded paper finally falls into the shredded paper box x2 and is accommodated by the shredded paper box x 2.
Although the existing paper shredder can shred the paper, the shredded paper is divided into a plurality of small paper pieces, and each small paper piece is in a fluffy state due to the characteristics of the paper, so that after falling into a paper shredding box x2, a large gap exists between the small paper pieces, and a large amount of space of the paper shredding box x2 is occupied; even for a small paper shredder, the volume of the paper shredding box x2 is small, so that after dozens of paper are shredded, the shredded paper can be spread over the whole paper shredding box x2, and the paper shredding box x2 needs to be cleaned without carrying out more paper shredding work, which is not beneficial to saving the paper shredding efficiency and the paper shredding time, and reduces the user experience.
Disclosure of Invention
Based on this, the present invention provides a paper shredder, which has the advantages of effectively compressing shredded paper in a paper shredder, increasing the accommodating space of the paper shredder, reducing the cleaning frequency of the paper shredder, improving the paper shredding efficiency, and thus improving the user experience.
A paper shredder comprises an upper cover, a paper shredding box, a compression mechanism and a water tank; the upper cover is covered on the paper shredding box and is connected with the compression mechanism, and the water tank is positioned at the bottom of the paper shredding box;
the top of the shredded paper box is provided with an opening; the upper cover is provided with a paper inlet communicated with the inner cavity of the paper shredding box, a rotary blade positioned below the paper inlet, a driving motor in driving connection with the rotary blade and a controller for controlling the driving motor;
the compression mechanism comprises a downward pressing driving mechanism and a compression plate connected with the lower end of the downward pressing driving mechanism; the pressing driving mechanism is positioned on the top surface of the upper cover and is electrically connected with the controller, and an output shaft of the pressing driving mechanism penetrates through the upper cover and extends into the inner cavity of the paper shredding box; the compression plate is located in the inner cavity of the shredded paper box and is inclined relative to the horizontal plane.
The outer wall of the water tank is tightly attached to the inner wall of the shredded paper box, and the top of the water tank is provided with an opening.
Compared with the prior art, the paper shredder reduces the gap of shredded paper by pressure and reduces the gap of the shredded paper by the principle that the bulkiness of the shredded paper is reduced after the shredded paper is wetted, and the compression mechanism is matched with the water tank to press the shredded paper in the inner cavity of the shredded paper box to the water tank, so that the shredded paper is prevented from being accumulated on the surface of the water tank and cannot be wetted, the wetting function of the water tank is fully exerted, the shredded paper in the shredded paper box is effectively compressed, the accommodating space of the shredded paper box is increased, the cleaning frequency of the paper shredder is reduced, the shredding efficiency is improved, and the user experience is improved.
Further, the compression plate has at least 2 pieces, thereby facilitating the full-scale compression of the shredded paper in the shredded paper box.
Furthermore, the compression plate is respectively connected with the lower end of the downward pressing driving mechanism through a torsion spring and is respectively connected with the output shaft of the downward pressing driving mechanism through a limiting rope, so that when compression is needed, the inclination degree of the compression plate relative to the horizontal plane is reduced along with the descending of the output shaft of the downward pressing driving mechanism, and the action area on paper shredding is increased; after compression is completed, when the compression mechanism needs to be retracted, the inclination degree of the compression plate relative to the horizontal plane is increased along with the rising of the output shaft of the downward pressing driving mechanism, the horizontal action area is reduced, and the situation that shredded paper is accumulated above the compression plate and cannot fall into the inner cavity of the shredded paper box when the shredded paper operation is carried out is avoided.
Furthermore, a drain hole is formed in the outer wall of the water tank, and a through hole matched with the position and the shape of the drain hole is formed in the shredded paper box. The structure is convenient for leading out the water in the water tank when the paper shredder needs to be cleaned.
Furthermore, the water tank is provided with a water pump and a water spray pipe connected with the water pump; and the output end of the water spray pipe is provided with an atomizing nozzle. The device is used for wetting shredded paper above the inner cavity of the shredded paper box and assisting in compressing the shredded paper.
Further, a first magnet is arranged on the edge of the bottom surface of the upper cover, and a second magnet is arranged on the edge of the top opening of the paper shredding box; when the upper cover is arranged at the top of the paper shredding box, the first magnet and the second magnet are mutually adsorbed. Through limiting, the upper cover and the shredded paper box are tightly adsorbed, and the upper cover is prevented from deviating from the opening of the shredded paper box after being vibrated.
Further, the device also comprises a Hall magnetic switch; the Hall magnetic switch is embedded in the first magnet or the second magnet, and the signal output end of the Hall magnetic switch is electrically connected with the controller and outputs a detection signal to the controller; the controller also controls the driving motor to be turned off according to the detection signal. The Hall magnetic switch is used for detecting whether the upper cover and the paper shredding box are separated or not, and corresponding signals can be sent to the controller in the separated state, so that the controller controls the driving motor to be powered off, therefore, when a user forgets to power off and takes out the upper cover, the driving motor is controlled to be powered off immediately, the phenomenon that the user is injured by the rotating blade due to the fact that the driving motor still works in the process that the user holds the upper cover by hand is avoided, and the use safety of the paper shredder is guaranteed.
Further, a valve is arranged at the paper inlet; the valve is electrically connected with the controller, and the controller controls the valve to be opened and closed according to the detection signal. By limiting the position, when a user forgets to shut down and takes out the upper cover, the driving motor is controlled to shut down, and the valve can be controlled to be closed, so that the phenomenon that the driving motor still works in the process that the user holds the upper cover to cause the injury of the user by the rotary blade is further avoided, and the use safety of the paper shredder is further improved.
Furthermore, the paper shredder also comprises a press control button electrically connected with the controller, and a window is arranged on the side surface of the paper shredding box; and a transparent baffle is arranged in the window of the window. By this definition, the user is enabled to know the shredded paper accommodating residual space in the shredded paper box in real time, so that the operating state of the compression mechanism can be manually controlled by pressing the control button.
Furthermore, the length of the compression plate is smaller than the inner diameter of the shredded paper box, so that a gap is formed between the compression plate and the shredded paper box, shredded paper produced by the rotary blade processing of the upper cover can fall into the inner cavity of the shredded paper box from the gap, and the situation that the shredded paper is accumulated above the compression plate and cannot fall into the inner cavity of the shredded paper box when the shredded paper operation is carried out is avoided.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a prior art shredder box;
FIG. 2 is a schematic structural view of the shredder box of the present invention;
FIG. 3 is a schematic view of the internal structure of the first embodiment of the shredder mechanism of the present invention in an operating state;
FIG. 4 is a schematic view of the internal structure of a first embodiment of the shredder of the present invention in a deactivated state of the compressing mechanism;
FIG. 5 is a schematic view showing the internal structure of a second embodiment of the shredder case of the present invention.
1. An upper cover; 11. a paper inlet; 2. shredding the paper box; 3. a compression mechanism; 31. a push-down drive mechanism; 32. a compression plate; a limiting rope; 4. a water tank; 41. a drain hole; 42. a water pump; 43. and a water spray pipe.
Detailed Description
Example 1
Referring to fig. 2, 3 and 4, the present invention provides a paper shredder, which comprises an upper cover 1, a paper shredding box 2, a compressing mechanism 3 and a water tank 4. The upper cover 1 covers the shredded paper box 2 and is connected with the compression mechanism 3, and the water tank 4 is positioned at the bottom of the shredded paper box 2.
The top of the shredded paper box 2 is provided with an opening. The upper cover 1 is provided with a paper inlet 11 communicated with the inner cavity of the paper shredding box 2, a rotary blade positioned below the paper inlet 11, a driving motor in driving connection with the rotary blade, and a controller for controlling the driving motor.
The compression mechanism 3 includes a downward pressing driving mechanism 31 and a compression plate 32 connected to a lower end of the downward pressing driving mechanism 31. The pressing driving mechanism 31 is located on the top surface of the upper cover 1 and electrically connected with the controller, and an output shaft of the pressing driving mechanism penetrates through the upper cover 1 and extends into the inner cavity of the shredded paper box 2. The compression plate 32 is located in the interior cavity of the carton 2 and is inclined with respect to the horizontal.
The outer wall of the water tank 4 is tightly attached to the inner wall of the paper shredding box 2, and the top of the water tank is provided with an opening.
In this embodiment, the paper shredder is convenient to compress shredded paper in the paper shredder omnidirectionally, the number of the compression plates 32 is at least 2, and further preferably, the compression plates 32 are respectively connected with the lower end of the downward pressing driving mechanism 31 through torsion springs and are respectively connected with the output shaft of the downward pressing driving mechanism 31 through limiting ropes 33, so that when compression is needed, the inclination degree of the compression plates 32 relative to the horizontal plane is reduced along with the descending of the output shaft of the downward pressing driving mechanism 31, and the acting area of the compression plates on shredded paper is increased; after the compression is completed, when the compression mechanism 3 needs to be retracted, the inclination degree of the compression plate 32 relative to the horizontal plane is increased along with the rising of the output shaft of the downward pressing driving mechanism 31, so that the horizontal action area is reduced, and the situation that shredded paper is accumulated above the compression plate 32 and cannot fall into the inner cavity of the shredded paper box 2 when the shredded paper is shredded is avoided.
In this embodiment, in order to facilitate the water in the water tank 4 to be led out when the shredder needs to be cleaned, the outer wall of the water tank 4 is provided with a drain hole 41, and the shredder case 2 is provided with a through hole matched with the drain hole 41 in position and shape.
In order to prevent the upper cover 1 from deviating from the opening of the shredded paper box 2 after being vibrated, preferably, the edge of the bottom surface of the upper cover 1 is provided with a first magnet, and the edge of the opening of the shredded paper box 2 is provided with a second magnet; when the upper cover 1 is covered on the top of the shredded paper box 2, the first magnet and the second magnet are mutually adsorbed.
In order to avoid the phenomenon that the user is injured by the rotary blade because the driving motor still works in the process that the user holds the upper cover 1 by hand when the user forgets to shut down and takes out the upper cover 1, the paper shredder also comprises a Hall magnetic switch as a better technical scheme; the Hall magnetic switch is embedded in the first magnet or the second magnet, and the signal output end of the Hall magnetic switch is electrically connected with the controller and outputs a detection signal to the controller; the controller also controls the driving motor to be turned off according to the detection signal. When the upper cover 1 is buckled at the opening of the paper shredding box 2, the first magnet and the second magnet are mutually adsorbed, the Hall magnetic switch detects a strong magnetic field, so that a switching-on signal is fed back to the controller, and the controller controls the driving motor to keep the current working state according to the switching-on signal; when the upper cover 1 is taken out from the opening of the paper shredding box 2, the first magnet is separated from the second magnet, the magnetic field detected by the Hall magnetic switch is weakened, so that a disconnection signal is fed back to the controller, the controller controls the driving motor to be shut down according to the disconnection signal, and the driving motor does not operate any more.
In order to further improve the use safety of the paper shredder, as a better technical scheme, the paper inlet 11 is provided with a valve; the valve is electrically connected with the controller, and the controller controls the valve to be opened and closed according to the detection signal. That is, when the controller controls the driving motor to shut down according to the turn-off signal of the Hall magnetic switch, the valve is also controlled to be closed at the same time; when the controller controls the driving motor to keep the current working state according to the switch-on signal of the magnetic switch, if the current working state of the driving motor is the starting operation, the controller controls the valve to be opened, and if the current working state of the driving motor is the shutdown, the controller controls the valve to be closed.
In order to enable a user to know the remaining space for containing shredded paper in the shredded paper box 2 in real time and manually control the working state of the compression mechanism 3, the invention preferably further comprises a press control button 31 electrically connected with the controller, and a window is arranged on the side surface of the shredded paper box 2; and a transparent baffle is arranged in the window of the window.
In order to form a gap between the compression plate and the shredded paper box, shredded paper produced by the rotary blade processing of the upper cover can fall into the inner cavity of the shredded paper box from the gap, so that the shredded paper is prevented from being accumulated above the compression plate and not falling into the inner cavity of the shredded paper box when the shredded paper operation is carried out, and the length of the compression plate 32 is smaller than the inner diameter of the shredded paper box 2.
In this embodiment, a corresponding working time period may be preset in the controller, and as long as the driving motor works cumulatively to the working time period, it indicates that the shredded paper in the shredded paper box 2 is almost filled with the whole shredded paper box 2, so that the controller can control the downward driving mechanism 31 to drive the compression plate 32 to move toward the inner bottom surface of the shredded paper box 2, and keep compressing the shredded paper, so that no shredded paper exists in the space above the top surface of the compression plate 32 in the shredded paper box 2, and the shredded paper box 2 can also contain more shredded paper. After the cleaning is finished, a reset instruction can be input to the controller through a reset key, so that the controller drives the pressing driving mechanism 31 to drive the compression plate 32 to move back to the inner bottom surface of the shredded paper box 2 to recover the original position.
In this embodiment, the structures of the rotary blade and the driving motor are the same as those of the conventional shredder, and thus are not described again. Moreover, like the prior art, the paper shredder of the invention also has the function keys in the prior art, such as an opening key, a closing key and the like, so as to control the normal operation of the paper shredder.
In the paper shredder of the invention, when the compressing mechanism 3 is in an operating state, the pressing driving mechanism 31 drives the compressing plate 32 to move towards the direction of the inner bottom surface of the paper shredding box 2, meanwhile, the compressing plate 32 is unfolded due to the combined action of the torsion spring and the limiting rope, the inclination degree of the compressing plate 32 relative to the horizontal plane is reduced along with the descending of the output shaft of the pressing driving mechanism 31, a larger acting area is formed to keep the compressed paper shreds, thereby most of the paper shreds are pressed into the water tank 4, the volume of the paper shreds is reduced under the combined influence of pressure and wetting, and the inner cavity of the paper shredding box 2 restores a larger accommodating space again.
When compressing mechanism 3 reseed, push down actuating mechanism 31 and drive compression plate 32 and move and resume the normal position toward the direction of the bottom surface in the shredded paper case 2 dorsad, simultaneously compression plate 32 closes owing to the combined action of torsional spring and spacing rope, its inclination for the horizontal plane increases along with the rising of the output shaft that pushes down actuating mechanism 31, finally, it returns compressing mechanism 3 stall state to avoid shredded paper volume when carrying out the shredded paper operation to press the inner chamber of shredded paper case 2 that can't drop in the top of compression plate 32, and the shredded paper that has not compressed before can drop toward shredded paper case 2 bottom owing to the action of gravity.
Compared with the prior art, the paper shredder reduces the gap of shredded paper by pressure and reduces the gap of the shredded paper by the principle that the bulkiness of the shredded paper is reduced after the shredded paper is wetted, and the compression mechanism is matched with the water tank to press the shredded paper in the inner cavity of the shredded paper box to the water tank, so that the shredded paper is prevented from being accumulated on the surface of the water tank and cannot be wetted, the wetting function of the water tank is fully exerted, the shredded paper in the shredded paper box is effectively compressed, the accommodating space of the shredded paper box is increased, the cleaning frequency of the paper shredder is reduced, the shredding efficiency is improved, and the user experience is improved.
Example 2
The embodiment 2 is modified from the embodiment 1, specifically, the water pump and the water spraying pipe device are added, and the specific steps are as follows:
in this embodiment, in order to wet shredded paper in the upper portion of the inner cavity of the shredded paper box 2 and assist in compressing the shredded paper, the water tank 4 is provided with a water pump 42 and a water spraying pipe 43 connected with the water pump 42. The output end of the water spray pipe 43 is provided with an atomizing nozzle.
During this device during the use, earlier with water pump 42 external power supply to water pump 42 starts to take out the water in water tank 4 to spray pipe 43, and through atomizing nozzle blowout, drenches the shredded paper of top in 2 inner chambers of shredded paper case, reduces the space of shredded paper and makes the shredded paper sink toward shredded paper case 2 bottoms under the influence of gravity simultaneously, presses remaining shredded paper to the water tank, further optimizes the effect of shredded paper compression.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more, and "plural" means two or more, unless otherwise specified.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A paper shredder is characterized in that: comprises an upper cover, a paper shredding box, a compression mechanism and a water tank; the upper cover is covered on the paper shredding box and is connected with the compression mechanism, and the water tank is positioned at the bottom of the paper shredding box;
the top of the shredded paper box is provided with an opening; the upper cover is provided with a paper inlet communicated with the inner cavity of the paper shredding box, a rotary blade positioned below the paper inlet, a driving motor in driving connection with the rotary blade and a controller for controlling the driving motor;
the compression mechanism comprises a downward pressing driving mechanism and a compression plate connected with the lower end of the downward pressing driving mechanism; the pressing driving mechanism is positioned on the top surface of the upper cover and is electrically connected with the controller, and an output shaft of the pressing driving mechanism penetrates through the upper cover and extends into the inner cavity of the paper shredding box; the compression plate is located in the inner cavity of the shredded paper box and is inclined relative to the horizontal plane.
The outer wall of the water tank is tightly attached to the inner wall of the shredded paper box, and the top of the water tank is provided with an opening.
2. The shredder according to claim 1, wherein: the compression plate has at least 2 pieces.
3. The shredder according to claim 2, wherein: the compression plate is connected with the lower end of the downward pressing driving mechanism through torsion springs respectively, and is connected with an output shaft of the downward pressing driving mechanism through limiting ropes respectively.
4. The shredder according to claim 1, wherein: the outer wall of the water tank is provided with a drain hole, and the shredded paper box is provided with a through hole matched with the drain hole in position and shape.
5. The shredder according to claim 1, wherein: the water tank is provided with a water pump and a water spray pipe connected with the water pump; and the output end of the water spray pipe is provided with an atomizing nozzle.
6. The shredder according to claim 1, wherein: a first magnet is arranged at the edge of the bottom surface of the upper cover, and a second magnet is arranged at the edge of an opening at the top of the paper shredding box; when the upper cover is arranged at the top of the paper shredding box, the first magnet and the second magnet are mutually adsorbed.
7. The shredder according to claim 6, wherein: the device also comprises a Hall magnetic switch; the Hall magnetic switch is embedded in the first magnet or the second magnet, and the signal output end of the Hall magnetic switch is electrically connected with the controller and outputs a detection signal to the controller; the controller also controls the driving motor to be turned off according to the detection signal.
8. The shredder according to claim 7, wherein: the paper inlet is provided with a valve; the valve is electrically connected with the controller, and the controller controls the valve to be opened and closed according to the detection signal.
9. The shredder according to claim 1, wherein: the pressing control button is electrically connected with the controller; a window is arranged on the side surface of the paper shredding box; and a transparent baffle is arranged in the window of the window.
10. The shredder according to claim 1, wherein: the length of the compression plate is less than the inner diameter of the carton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811147362.8A CN110961214A (en) | 2018-09-29 | 2018-09-29 | Paper shredder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811147362.8A CN110961214A (en) | 2018-09-29 | 2018-09-29 | Paper shredder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110961214A true CN110961214A (en) | 2020-04-07 |
Family
ID=70027294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811147362.8A Withdrawn CN110961214A (en) | 2018-09-29 | 2018-09-29 | Paper shredder |
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| Country | Link |
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| CN (1) | CN110961214A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477350A (en) * | 2021-07-21 | 2021-10-08 | 上海大学 | Miniature accounting kneader |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150101187A (en) * | 2014-02-26 | 2015-09-03 | 제주대학교 산학협력단 | Automatic compression shredder |
| CN105964363A (en) * | 2016-06-30 | 2016-09-28 | 郑晓红 | Paper shredder with great space storage amount |
| CN207324995U (en) * | 2017-09-01 | 2018-05-08 | 林俊杰 | A kind of office shredder with compression function |
| CN108097407A (en) * | 2017-12-18 | 2018-06-01 | 苏州德特尼罗电子科技有限公司 | A kind of office shredder of strong security |
-
2018
- 2018-09-29 CN CN201811147362.8A patent/CN110961214A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150101187A (en) * | 2014-02-26 | 2015-09-03 | 제주대학교 산학협력단 | Automatic compression shredder |
| CN105964363A (en) * | 2016-06-30 | 2016-09-28 | 郑晓红 | Paper shredder with great space storage amount |
| CN207324995U (en) * | 2017-09-01 | 2018-05-08 | 林俊杰 | A kind of office shredder with compression function |
| CN108097407A (en) * | 2017-12-18 | 2018-06-01 | 苏州德特尼罗电子科技有限公司 | A kind of office shredder of strong security |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113477350A (en) * | 2021-07-21 | 2021-10-08 | 上海大学 | Miniature accounting kneader |
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Application publication date: 20200407 |