CN113556436A - Image reading apparatus and image forming apparatus - Google Patents
Image reading apparatus and image forming apparatus Download PDFInfo
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- CN113556436A CN113556436A CN202010329662.9A CN202010329662A CN113556436A CN 113556436 A CN113556436 A CN 113556436A CN 202010329662 A CN202010329662 A CN 202010329662A CN 113556436 A CN113556436 A CN 113556436A
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- air introduction
- image reading
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- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000012546 transfer Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 9
- 239000003086 colorant Substances 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00519—Constructional details not otherwise provided for, e.g. housings, covers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00519—Constructional details not otherwise provided for, e.g. housings, covers
- H04N1/00551—Top covers or the like
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimiles In General (AREA)
Abstract
The invention provides an image reading apparatus and an image forming apparatus. The image reading apparatus includes: an original document table for placing an original document; the original cover plate is rotatably arranged on the original table through a rotating shaft and is used for covering the original table; and an original cover plate connected to the original cover plate and having a pressing surface for pressing an original placed on the original platen; wherein the pressing surface of the original cover is provided with an air introduction groove. The image forming apparatus includes: an image reading device for reading an image on an original; and an image forming unit for forming the read image.
Description
Technical Field
The present invention relates to an image reading apparatus and an image forming apparatus including the image reading apparatus.
Background
In an image reading apparatus, a document to be copied or scanned is placed on a document table glass of a document table, and the document placed on the document table glass is pressed by a document cover. Due to the requirement of the reading precision of the portrait, the manuscript pressing plate of the manuscript cover plate needs to be tightly attached to the manuscript table glass of the manuscript table, so that a vacuum state is formed between the manuscript pressing plate and the manuscript table glass. Therefore, when the original cover is opened, a force for opening the original cover is increased, and the original is sucked to the original cover, which leads to deterioration in operability and usability.
Disclosure of Invention
In order to solve the above-described problems, embodiments of the present invention provide an image reading apparatus and an image forming apparatus including the image reading apparatus, which can introduce air into a suction portion of an original platen and an original platen when an original cover is opened, and solve a phenomenon of vacuum suction of the original platen and the original platen.
According to an aspect of the present invention, there is provided an image reading apparatus including; an original document table for placing an original document; the original cover plate is rotatably arranged on the original table through a rotating shaft and is used for covering the original table; and an original cover plate connected to the original cover plate and having a pressing surface for pressing an original placed on the original platen; wherein the pressing surface of the original cover is provided with an air introduction groove.
In some embodiments, the air introduction groove extends in a direction perpendicular to the extending direction of the rotation shaft.
In some embodiments, the shape of the air introduction groove is triangular, rectangular, trapezoidal, or circular arc as viewed from the extending direction of the air introduction groove.
In some embodiments, the width of the opening of the air introduction groove is less than 10 mm.
In some embodiments, the lowest point of the air introduction groove has a depth of 0.5 to 1.4 mm.
In some embodiments, the length of the air introduction groove is greater than or equal to 2/3 of the length of the original cover and less than the length of the original cover.
In some embodiments, the original cover has a thickness of more than 1mm where the air introduction groove is provided.
In some embodiments, the air introduction grooves are plural and provided in the middle portions of the original cover, respectively.
In some embodiments, the original platen is connected to the original cover by a plurality of movable connections.
The present invention also provides an image forming apparatus comprising: the image reading device is used for reading an image on an original; and an image forming unit for forming the read image.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the air introduction groove is formed in the original cover plate of the original cover, so that when the original cover is opened, air is introduced into the suction part of the original cover plate and the original table through the air introduction groove, the vacuum suction force of the original cover plate and the original table is reduced, the original cover plate is conveniently opened, and paper is prevented from being adsorbed on the original cover plate.
Drawings
Other features and advantages of the present invention will be better understood by the following detailed description of alternative embodiments, taken in conjunction with the accompanying drawings, in which like characters represent the same or similar parts, and in which:
FIG. 1 shows a schematic structural diagram of an image reading apparatus according to an embodiment of the present invention;
FIG. 2 shows a schematic view of a portion of the image reading apparatus of FIG. 1;
FIGS. 3a to 3d are schematic views showing different shapes of the air introduction grooves of the original cover according to the embodiment of the present invention;
fig. 4 shows a schematic sectional view of an air introduction groove of an original cover according to an embodiment of the present invention; and
fig. 5 shows a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention.
Detailed Description
The practice and use of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention. The description herein of the structural positions of the respective components, such as the directions of upper, lower, top, bottom, etc., is not absolute, but relative. When the respective components are arranged as shown in the drawings, these direction expressions are appropriate, but when the positions of the respective components in the drawings are changed, these direction expressions are changed accordingly.
In the related art, the original pressing plate is made of an elastic sponge to ensure that the original is tightly pressed against the original platen glass. Such an original cover is stuck to the original cover by an adhesive or the like applied to a peripheral area of the original cover. Since the sponge is easily changed in strength, deformation, and the like due to the influence of durability and environment, the parallelism of the original cover plate is required to be high in order to ensure the close contact between the sponge and the original platen glass of the original platen. The original cover plate made of synthetic material has low cost, is not influenced by environment, and is not required by the parallelism of the original cover plate. However, the original cover plate cannot be smoothly attached to the original cover plate due to a problem of molding, and therefore, the original cover plate cannot be attached to the original cover plate like a sponge but is movably attached to the original cover plate by a separate structure, so that the original cover plate can move up and down relative to the original cover plate and can be better brought into contact with the original platen glass.
However, with this separate type of structure, the original cover cannot be moved in parallel with the original cover (the original cover is delayed from the original cover) during the process of opening the original cover, and the original cover is opened to a certain angle, and the original cover is also in close contact with the original platen and the platen glass due to vacuum suction, so that the force for opening the original cover is increased, and the original is sucked to the original cover, which leads to deterioration in operability and usability.
To this end, an embodiment of the present invention provides an image reading apparatus in which an air introduction groove is provided in an original cover plate of an original cover, and air is introduced into a suction portion of the original cover plate and the original platen through the air introduction groove when the original cover is opened, thereby reducing a vacuum suction force of the original cover plate and the original platen.
Hereinafter, an image reading apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in fig. 1, according to the embodiment of the present invention, an image reading apparatus 10 mainly includes an original platen 11, an original cover 12, and an original cover 13.
The document table 11 has a document supporting surface 111 for placing a document, and the document supporting surface 111 is formed of a glass plate or the like and is provided on the top surface of the image reading apparatus main body. The image reading apparatus 10 further includes an original reading unit 14, such as an optical scanning apparatus, the original reading unit 14 being disposed below the original supporting surface 111 of the original table 11, for reading image data from an original document placed on the original supporting surface 11.
In the reading process, if the original document is bent or curled to lift a part of the original document off the original document supporting surface 111, the original document cannot be read normally. Therefore, the image reading apparatus 10 further includes the original cover 12 and the original cover 13. The document cover 12 is rotatably attached to the document table 11, for example, by a rotating shaft 121, and covers the document table 11. The original cover 12 is connected to the original cover 13 by, for example, a plurality of movable joints 133, which may be made of a synthetic material such as resin. The original cover 13 has a pressing surface 131 for pressing an original placed on the original supporting surface 111 of the original table 11. The original cover 12 is openable and closable above the original supporting surface 111 to expose and cover the original supporting surface 111, and the original cover 13 is provided on a surface of the original cover 12 opposite to the original supporting surface 111, and the original cover 13 is movable up and down with respect to the original cover 12. When the original cover 12 is closed, the original pressing plate 13 presses the original tightly against the original supporting surface 111.
The image reading apparatus 10 reads a document placed on the document supporting surface 111 of the document table 11, acquires image data, and then transfers the image data to the end or continues image formation in the image forming apparatus. When a document on a document table 11 is read, a document cover plate 12 which covers the document table 11 is provided above the document table 11 to shield disturbance light entering an image reading portion from the outside, thereby improving the quality of an image obtained after reading.
As shown in fig. 2 in conjunction, according to the embodiment of the present invention, the pressing surface 131 of the original cover 13 is provided with an air introduction groove 132. In some embodiments, the extending direction of the air introduction groove 132 is perpendicular to the extending direction of the rotation shaft 121. Specifically, the air introduction groove 132 extends from one side edge of the original cover 13 away from the rotation shaft 121 toward one side of the original cover 13 adjacent to the rotation shaft 121. The air introduction groove 132 extends inward from the operation side (left side in fig. 1) as viewed from the operation side (left side in fig. 1) that opens or closes the original cover 12.
When the original cover 12 is opened after reading is finished, the original cover 12 rotates upward, and the original cover 12 and the original cover 13 are movably connected to each other, so that the original cover 13 is not moved temporarily and still in close contact with the original supporting surface 111. By providing the air introduction groove 132 on the side of the original platen 13 facing the original table 11, air can be introduced into the suction portion of the original platen 13 and the original table 11 through the air introduction groove 132.
According to the formula: f ═ sxp/μ;
where F denotes a suction force between the original cover 13 and the original supporting surface 111 of the original platen 11, S denotes a suction area between the original cover 13 and the original supporting surface 111 of the original platen 11, P denotes an air pressure, and μ denotes a safety factor.
As can be seen from the above formula, by providing the air introduction groove 132, the suction area between the original cover 13 and the original supporting surface 111 of the original table 11 is reduced, and therefore the suction force is also reduced, and air can be easily introduced between the original cover 13 and the original supporting surface 111 of the original table 11 along with the air introduction groove 132. Since the vacuum suction force between the original cover 13 and the original supporting surface 111 of the original table 11 is reduced, the original cover 12 is easily opened, and the paper is prevented from being sucked onto the original cover 13.
As shown in fig. 3a to 3d, in some embodiments, the shape of the air introduction grooves 132 is triangular, rectangular, trapezoidal, or circular arc, as viewed along the extending direction of the air introduction grooves 132. For example, the triangular air introduction grooves 132 in fig. 3a can have a smaller cross-sectional area with a reduced suction area being uniform, and can press the original better against the original supporting surface 111. In other embodiments, the air introduction groove 132 may also have any other shape.
In some embodiments, the width d of the opening of the air introduction groove 132 is less than 10 mm. In some embodiments, the depth h of the lowest point of the air introduction groove 132 is between 0.5 and 1.4 mm. In some embodiments, the thickness of the original cover 13 where the air introduction groove 132 is provided is greater than 1 mm.
As shown in fig. 4 in combination, in some embodiments, the length L1 of the air introduction groove 132 is greater than or equal to 2/3 of the length L2 of the original platen 13 and is less than the length L2 of the original platen 13.
In some embodiments, the air introduction grooves 132 are plural and provided in the middle portions of the original cover 13, respectively. In other embodiments, the air introduction groove 132 may be provided at the front end position (right end as viewed from the operation side) of the paper, but it should be avoided to be provided at the rear end position (left end as viewed from the operation side) of the paper, mainly in consideration of the fact that if the rear end of the paper is curved, the paper easily enters the air introduction groove 132, thereby causing a phenomenon of poor image quality.
Fig. 5 shows a schematic configuration diagram of an image forming apparatus 100 including the image reading apparatus 10. The invention is not limited to the embodiment shown in fig. 5.
The image forming apparatus 100 shown in fig. 5 forms an image by superimposing colors on paper based on image data obtained by reading a color image formed on a document or image data input from an external information device (for example, a personal computer) via a network. The image forming apparatus 100 arranges photosensitive drums 33 corresponding to 4 colors of yellow (Y), magenta (M), cyan (C), and black (K) in series along the running direction of a transfer target (the intermediate transfer belt 37 in the image forming apparatus 100), and the transfer target transfers toner images of the respective colors in order to form an image on a sheet by fixing.
As shown in fig. 5, the image forming apparatus 100 has an image reading apparatus 10, an image processing unit 20, an image forming unit 30, a sheet storage unit 40, a sheet conveying unit 50, and a control unit.
The control Unit has a CPU (Central Processing Unit), a ROM (Read Only Memory) and a RAM (Random Access Memory). The CPU reads out a program corresponding to the processing contents from the ROM, expands the program in the RAM, and collectively controls the operations of the respective modules (the image reading apparatus 10, the image processing unit 20, the image forming unit 30, the sheet storage unit 40, the sheet conveying unit 50, and the like) in the image forming apparatus 100 in cooperation with the expanded program.
The control unit has a communication unit (not shown) and transmits various data to and from an external device (for example, a personal computer) via a communication Network such as a LAN (Local Area Network) or a WAN (Wide Area Network).
The image reading apparatus 10 also has an automatic Document Feeder 15 of an ADF (Auto Document Feeder). The automatic document feeder 15 conveys the document G placed on the document tray 16 by the conveying mechanism, and feeds the document G to the document reading unit 14. The original reading unit 14 reads an image of the original G conveyed by the automatic original feeding device 15.
The original reading unit 14 may read an image of an original by optically scanning the original that is conveyed onto the original supporting surface 111 by the automatic original feeder or placed on the original supporting surface 111 and then imaging reflected light from the original on a light receiving surface of a sensor 17 such as a CCD (Charge Coupled Device).
The image processing unit 20 is constituted by a circuit capable of performing analog-to-digital (a/D) conversion processing, a circuit performing digital image processing, and the like. The image processing unit generates digital image data by performing a/D conversion processing on an analog image signal from the image reading device. The image processing unit performs color conversion processing on the digital image data and conversion processing according to conditions set in advance by the user, and then controls the image forming unit 30 to form an image on a sheet according to the processed image data.
The image forming unit 30 is constituted by image forming units 30Y, 30M, 30C, 30K corresponding to different color components, and an exposure device 31, a developing device 32, a photosensitive drum 33, a charging device 34, a cleaning device 35, a primary transfer roller 36, and the like corresponding to each color component, and an intermediate transfer unit.
The sheet storage unit 40 is provided at a lower portion of the main body of the image forming apparatus 100, and may be designed to have a structure having a plurality of sheet cassettes 41 corresponding to the size of the sheets S. In the cassette 41, the sheet is conveyed to the image forming unit by the sheet conveying section. A paper feed tray 42 may also be provided near the paper storage unit 40 for feeding some of the paper that is difficult to hold in the paper cassette 41 because of its size, to the image forming apparatus.
The sheet conveying unit 50 has a sheet extracting mechanism 51 and a sheet conveying mechanism 52. The sheet take-up mechanism 51 takes up the sheets stored in the sheet storage unit 40. The sheet conveying unit 52 conveys the sheet S extracted by the sheet extracting mechanism 51 to the image forming unit 30.
The operation of the image forming unit will be described below by taking the unit corresponding to the Y component as an example.
In the image forming unit corresponding to the Y component, the photosensitive drum 33 is charged by the charging device 34. Then, an exposure device 31 composed of, for example, a semiconductor laser emits laser light corresponding to the Y component to the photosensitive drum to form an electrostatic latent image corresponding to the Y component on the surface of the photosensitive drum 31. The developing device 32 causes the developer corresponding to the Y component stored therein to adhere to the surface of the photosensitive drum 31, thereby developing the electrostatic latent image to form a colorant image.
Similarly, in the cells corresponding to the M component, C component and K component, a colorant image is formed in the same manner as described above.
After the toner images corresponding to the respective components are formed, the intermediate transfer belt 37 is first pressed against the photosensitive drum 33 by the primary transfer roller 36 by the intermediate transfer unit, and the toner images of the respective colors are sequentially transferred onto the intermediate transfer belt 37 in a superimposed manner. Then, the intermediate transfer belt 37 is pressed against the sheet S by the secondary transfer roller 38, and the toner image is secondarily transferred to the sheet S.
Subsequently, the cleaning device 35 removes the toner remaining on the surface of the photosensitive drum 33 after the primary transfer. The cleaning device 39 removes the toner remaining on the intermediate transfer belt after the secondary transfer.
After the secondary transfer is completed, the fixing device 61 located on the downstream side in the paper conveying direction heats and presses the paper S, and fixes the colorant image on the paper S to the paper S.
A switching guide 62 is disposed downstream of the fixing device 61. The switching guide 62 can switch the paper conveyance path after the fixing is completed. When printing one side of the sheet S, the switching guide 62 guides the sheet S to the position of the discharge roller 63, and the sheet S is discharged to the outside via the discharge roller. On the other hand, when duplex printing is performed on the sheet S, the switching guide 62 guides the sheet downward, passes through the sheet reversing mechanism 64, and is conveyed again to the image forming unit, thereby forming an image on the back surface of the sheet.
Further, a post-processing apparatus for stapling and punching the sheets, for example, may be disposed downstream of the sheet discharge rollers.
The image reading apparatus according to any of the above embodiments of the present invention may be used in an image forming apparatus having an image reading function, or may be used in an image forming apparatus such as a scanner having only a scanning function and an original image reading function.
While the technical content and the technical features of the invention have been disclosed, it is understood that various changes and modifications of the disclosed concept can be made by those skilled in the art within the spirit of the invention, and the invention is not limited thereto. The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.
Claims (10)
1. An image reading apparatus includes;
an original document table for placing an original document;
the original cover plate is rotatably arranged on the original table through a rotating shaft and is used for covering the original table; and
a document cover plate having a pressing surface for pressing a document placed on the document table;
characterized in that an air introduction groove is provided on the pressing surface of the original cover.
2. The image reading apparatus according to claim 1, wherein an extending direction of the air introduction groove is perpendicular to an extending direction of the rotation shaft.
3. The image reading apparatus according to claim 2, wherein the shape of the air introduction groove is triangular, rectangular, trapezoidal, or circular arc as viewed from the extending direction of the air introduction groove.
4. The image reading apparatus according to any one of claims 1 to 3, wherein the width of the opening of the air introduction groove is less than 10 mm.
5. The image reading apparatus according to any one of claims 1 to 3, wherein a depth of the lowest point of the air introduction groove is between 0.5 and 1.4 mm.
6. The image reading apparatus according to any one of claims 1 to 3, wherein the length of the air introduction groove is greater than or equal to 2/3 of the length of the original cover and less than the length of the original cover.
7. The image reading apparatus according to any one of claims 1 to 3, wherein a thickness of the original cover where the air introduction groove is provided is larger than 1 mm.
8. The image reading apparatus according to any one of claims 1 to 3, wherein the air introduction grooves are plural and provided in a middle portion of the original cover, respectively.
9. The image reading apparatus according to any one of claims 1 to 3, wherein the original cover is connected to the original cover by a plurality of movable links.
10. An image forming apparatus, comprising:
the image reading apparatus according to any one of claims 1 to 9, which is used for reading an image on an original; and
an image forming unit for forming the read image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329662.9A CN113556436A (en) | 2020-04-23 | 2020-04-23 | Image reading apparatus and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329662.9A CN113556436A (en) | 2020-04-23 | 2020-04-23 | Image reading apparatus and image forming apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN113556436A true CN113556436A (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010329662.9A Pending CN113556436A (en) | 2020-04-23 | 2020-04-23 | Image reading apparatus and image forming apparatus |
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| Country | Link |
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| CN (1) | CN113556436A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007088792A (en) * | 2005-09-21 | 2007-04-05 | Funai Electric Co Ltd | Scanner |
| JP2014146911A (en) * | 2013-01-28 | 2014-08-14 | Fuji Xerox Co Ltd | Image reading device and image forming apparatus |
| CN109943923A (en) * | 2019-04-04 | 2019-06-28 | 六安市海洋羽毛有限公司 | A kind of equipment of the full-automatic electrostatic based on natural feather separation |
-
2020
- 2020-04-23 CN CN202010329662.9A patent/CN113556436A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007088792A (en) * | 2005-09-21 | 2007-04-05 | Funai Electric Co Ltd | Scanner |
| JP2014146911A (en) * | 2013-01-28 | 2014-08-14 | Fuji Xerox Co Ltd | Image reading device and image forming apparatus |
| CN109943923A (en) * | 2019-04-04 | 2019-06-28 | 六安市海洋羽毛有限公司 | A kind of equipment of the full-automatic electrostatic based on natural feather separation |
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