TWI469601B - Duplex scanning device - Google Patents

Description

Double-sided paper-feeding scanning device

The present invention relates to a scanning device, and more particularly to a sheet-fed scanning device that feeds documents using an automatic paper feeder.

Science and technology have become more and more developed with the evolution of the times. The preservation of documents has evolved from the traditional paper-based document archiving to the electronic file of stored documents with the development of science and technology. The tools commonly used for electronic document processing are scanning devices, scanning. The device is used to convert the content of the paper document into an electronic file by scanning, so that the user can spread, organize or save.

The early scanning device was a flatbed scanner that had to place a single file on its scanning platform and only scanned a single file each time it was run. When the user wants to scan the image of the plural file, the file on the scanning platform must be manually replaced repeatedly to complete the scanning of the plurality of files. In view of the cumbersome manual replacement, an automatic paper feeder has been developed on the market, which cooperates with a flatbed scanner to form a double-sided paper-feeding scanning device for automatic paper feeding and printing for multiple files without manual replacement of files. Scanning of multiple files can be completed.

Next, the structure and operation of the conventional double-sided sheet-fed scanning device will be described. Please refer to FIG. 1 , which is a side view showing a cross-sectional structure of a conventional double-sided paper feeding scanning device. The conventional double-sided paper-feeding scanning device 1 includes an automatic paper feeder 10 and a scanning device 11. The automatic paper feeder 10 includes a paper tray 101, a paper output tray 102, a paper take-up module 103, and a paper feeding passage. 104. A plurality of paper feed roller sets 105, a flip path 106, and a paper output roller set 107. Scanning device 11 It is disposed below the automatic paper feeder 10 and below the paper feed passage 104 for scanning a document passing thereover.

In the automatic paper feeder 10, the paper feed cassette 101 is used to place a plurality of unprinted documents S, and the paper discharge cassette 102 is located below the paper feed cassette 101 for placing the scanned plurality of documents S. The paper take-up module 103 is located at one end of the paper feed passage 104 and is coupled to a first drive motor (not shown) which is swingable relative to the paper feed passage 104 and feeds a plurality of documents S located on the paper feed cassette 101. The paper feed path 104, wherein the paper take-up module 103 feeds only one of the plurality of files S into the paper feed path 104 at a time. The paper feed path 104 is disposed between the paper feed cassette 101 and the paper output cassette 102 and passes through the scanning device 11 for sequentially passing the plurality of documents S. The plurality of paper feed roller sets 105 are disposed on the paper feed path 104 and connected to A second drive motor (not shown) for sequentially feeding the plurality of documents S to move within the paper feed passage 104. The inversion channel 106 is disposed between the paper feed channel 104 and the paper output roller group 107 for sequentially passing the plurality of files and sequentially turning the plurality of files S. The paper output roller set 107 is located at the other end of the paper feed path 104 and is coupled to a second drive motor for feeding the plurality of documents S through the scanning device 11 to the paper discharge cassette 102, or feeding the plurality of documents S into the inversion passage 106.

Next, the operation of the conventional double-sided sheet-fed scanning apparatus 1 for single-sided scanning will be described. Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 2 is a side cross-sectional view showing the operation of the automatic paper feeder of the conventional double-sided paper feeding type scanning device. In FIG. 1, when the automatic paper feeder 10 is not in operation, the paper take-up module 103 is away from the paper feed passage 104, so that the user places the plurality of documents S onto the paper feed cassette 101, and one end of the plurality of documents is located in the paper take-up module. Below 103. In FIG. 2, when the automatic paper feeder 10 is in operation, the first drive motor operates to provide a first power to the paper take-up module 103, so that the paper take-up module 103 swings relative to the paper feed path 104 and contacts the plurality of documents S. After the paper take-up module 103 comes into contact with the plurality of documents S, it feeds the uppermost one of the plurality of files S into the paper feed path 104 in response to the first power supplied from the first drive motor. Next, the multiple feed rolls The wheel set 106 operates in response to a second power provided by the second drive motor such that the document S entering the paper feed path 104 is fed by the plurality of paper feed roller sets 106 to the scanning device 11, wherein the first side of the document S It faces the scanning device 111.

During the passage of the document S through the scanning device 11, the scanning device 11 simultaneously scans the first side of the document S passing through the paper feed path 104. After the document S is fed out of the scanning device 11 and the scanning device 11 scans the first side of the document S, the next file in the plurality of files S is also fed into the paper feeding path 104 through the above operation process. The scanned document S is fed to the paper discharge cassette 102 by the paper output roller set 107. After the first side of the plurality of documents S is scanned and fed onto the paper output cassette 102, the user can take out the plurality of documents S from the paper output cassette 102. The one-sided scanning of the plural file S is completed.

When the user wants to perform double-sided scanning on the plurality of files S, the conventional double-sided sheet-fed scanning device 1 performs the above-described single-sided scanning operation to complete the scanning operation of the first side of the document S, and the document S is fed out The paper roller set 107, at this time, the second drive motor is reversed, so that the paper discharge roller set 107 is reversed to feed the document S into the inversion passage 106, and the document S passes through the inversion passage 106 and the paper feed passage 104 again. By means of the scanning device 11, the second side of one of the documents S faces the scanning device 11. The scanning device 11 scans the second side of the document S that passes through the paper feed path 104, and the paper output roller set 107 feeds the document again into the flip path. Next, the document passes through the inversion channel 106 and the paper feed path 104 and passes through the scanning device 11 for the third time. At this time, the scanning device 11 does not operate, so that the document passing through the scanning device 11 is fed to the paper output by the paper output roller set 107. 102. Finally, the remaining files in the plurality of files S are also scanned on both sides by the above-described operation process, and the scanned document S is fed to the paper output cassette 102 by the paper output roller set 107. The duplex scanning of the plural file S is completed.

In the process of performing double-sided scanning by the conventional double-sided paper-feeding scanning device 1, the fed document S must pass through the scanning device 11 three times, and the purpose of the first pass is to scan the file S. On the one hand, the second pass is for scanning the second side of the document S, and the third pass is for maintaining the stacking order of the plurality of documents S on the output tray 102 in the same order as on the tray 101. The stacking order prevents the user from manually recovering the stacking order of the plurality of files S after the duplex scanning is completed. However, the double-sided scanning process of the conventional double-sided sheet-fed scanning device 1 has to feed the document S through the scanning device 11 three times, which takes a long time, which lowers the working speed of the conventional double-sided sheet-fed scanning device 1. Therefore, there is a need for a double-sided sheet-fed scanning device that can increase the speed of work.

It is an object of the present invention to provide a double-sided sheet-fed scanning device that can increase the speed of operation.

In a preferred embodiment, the present invention provides a double-sided sheet-fed scanning device for scanning a plurality of documents, the double-sided sheet-fed scanning device comprising: a scanning device for reading an image of the plurality of files; And an automatic paper feeder disposed above the scanning device for feeding the plurality of documents into the scanning device, the automatic paper feeder comprising: a paper tray for placing the plurality of documents; a first paper feeding passage, Close to the paper tray for passing one of the top files of the plurality of files; a second paper feed channel disposed below the first paper feed path for one of the plurality of files Passing a document; a switching component disposed between the first paper feed passage and the second paper feed passage and swingable relative to the first paper feed passage, wherein the uppermost document is fed to the first paper feed Channel or causing the lowermost document to enter the second paper feed passage; a first paper take-up module located above the first paper feed path and swingable relative to the first paper feed path for feeding the uppermost document on the paper feed into the first paper feed a second paper take-up module disposed under the second paper feed passage for feeding the lowermost document on the paper feed tray into the second paper feed passage; a plurality of paper feed rollers, setting In the automatic paper feeder, the plurality of files are fed into the scanning device; a first power module is connected to the first paper picking module, the second paper picking module, and the switching component for providing a first power supply to the first paper take-up module, the second paper take-up module, and the switch assembly, such that the first paper take-up module feeds the uppermost file, and the second paper take-up module feeds the lowermost And the second power module is coupled to the first paper take-up module and the plurality of paper feed rollers for providing a second power to the first a paper take-up module and the plurality of paper feed rollers to make the first paper take-up module The first feed path for swinging, and the plurality of paper feed roller feeding the plurality of document.

In a preferred embodiment, the first pick-up module includes: a first drive shaft coupled to the first power module for transmitting the first power from the first power module; a picking arm is disposed on the first drive shaft and does not rotate synchronously with the first drive shaft, and the pick-up arm is coupled to the second power module for receiving the second power module a second power is oscillated relative to the first paper feed path; a first paper feed roller is disposed on the first drive shaft and rotates synchronously with the first drive shaft for feeding in the first paper feed passage One of the uppermost files enters the automatic paper feeder or provides a first frictional force to the lowermost document; a second drive shaft coupled to the first power module for transmitting the first power; a first pick-up gear set partially disposed on the first drive shaft without rotating synchronously with the first drive shaft, And the first pick-up gear set is coupled to the second drive shaft for transmitting the first power; and a first pick-up roller is disposed on the pick-up arm and coupled to the first pick-up gear set, And feeding the uppermost document on the paper tray into the first paper feed passage or being fixed and not rotating according to the second transmission shaft fixed by the first power module.

In a preferred embodiment, the first pick-up roller has a first connecting gear adjacent to the first pick-up roller and is coupled to the first pick-up roller for driving the first pick-up roller to rotate The second transmission shaft includes a second connecting gear disposed on the second transmission shaft and coupled to the first power module for synchronously rotating with the second transmission shaft, when the second transmission shaft is adapted When the first power is rotated in a first rotation direction, the second connecting gear drives the first paper take-up gear set to rotate, and the first paper take-up gear set drives the first connecting gear to rotate, so that the first paper is taken Rotating the roller in a second rotation direction opposite to the first rotation direction to feed the uppermost document into the first paper feed passage, and the first transmission shaft is rotated in the second rotation direction to make the first paper separation The roller rotates in the second rotation direction to feed only the uppermost document into the automatic paper feeder; and when the first transmission shaft rotates in the first rotation direction according to the first power, the first separation roller Rotating in the first direction of rotation The frictional force to the lowermost first file, the second power transmission shaft by the first module is fixed against rotation, that the first pickup roller assembly is fixed against rotation.

In a preferred embodiment, the switching component includes: a switching gear set connected to the first power module for transmitting the first power; and a switching shaft connected to the switching gear set for responding Rotating with the first power; A switch is disposed on the switching shaft and can swing according to the rotation of the switching shaft to open the first paper feed passage or the second paper feed passage.

In a preferred embodiment, the switching component further includes a torque limiting component disposed in the at least one switching gear of the switching gear set for the switching switch and the first paper take-up module or the second When the paper feeding path is in contact, the switching shaft is controlled not to rotate synchronously with the at least one switching gear.

In a preferred embodiment, when the switching shaft rotates in a first rotation direction due to the first power, the switching switch is driven by the switching shaft to swing in the first rotation direction to open the second paper feed. Closing the first paper feed passage, and when the switching shaft rotates in a second rotation direction opposite to the first rotation direction due to the first power, the switch is driven by the switching shaft to the first The two rotation directions are swung to open the first paper feed path and close the second paper feed path.

In a preferred embodiment, the second pick-up module includes: a third drive shaft coupled to the first power module for transmitting the first power from the first power module; a second separation roller disposed on the third transmission shaft and rotating in synchronization with the third transmission shaft for feeding only one of the lowermost files located in the second paper feed passage into the automatic paper feeder, or Providing a second friction force to the uppermost file; a fourth transmission shaft coupled to the first power module for transmitting the first power; and a second paper take-up gear set partially disposed at the third transmission The shaft does not rotate synchronously with the third transmission shaft, and the second paper take-up gear set is coupled to the fourth transmission shaft for transmitting the first power; and a second pickup roller is coupled to the second paper take-up And a gear set for feeding the lowermost document on the paper tray into the second paper feed passage or fixed and not rotating according to the fourth transmission shaft fixed by the first power module.

In a preferred embodiment, the second pick-up roller has a third connecting gear adjacent to the second pick-up roller and connected to the second pick-up roller for driving the second pick-up roller to rotate The fourth drive shaft includes a fourth connecting gear disposed on the fourth drive shaft and coupled to the first power module for synchronously rotating with the fourth drive shaft, when the fourth drive shaft is in response When the first power is rotated in a second rotation direction, the fourth connecting gear drives the second paper take-up gear set to rotate, and the second paper take-up gear set drives the third connecting gear to rotate, so that the second paper take-up Rotating the roller in a first rotation direction opposite to the second rotation direction to feed the lowermost document into the second paper feed passage, the third transmission shaft rotating in the first rotation direction due to the first power, so that The second separation roller rotates in the first rotation direction to feed only the lowermost document into the automatic paper feeder; and when the third transmission shaft rotates in the second rotation direction according to the first power, The second separation roller goes to the second Rotation of the rotational direction to provide a second frictional force to the top of the file, and the fourth transmission shaft is fixed to the first power module does not rotate, the pickup roller so that the second group is fixed against rotation.

In a preferred embodiment, the first power module includes: a first driving component for rotating to provide the first power; and a first driving gear set coupled to the first driving component for transmitting The first transmission gear set is coupled to the first paper take-up module for transmitting the first power to the first paper take-up module; and a second drive gear set is disposed at the first a lower portion of the transmission gear set and coupled to the second paper take-up module for transmitting the first power to the second paper take-up module; and a planetary gear module coupled to the first drive gear set and located at the The first transmission gear set and the second transmission gear set are configured to swing and be coupled to the first transmission gear set or the second transmission gear set in response to the first power.

In a preferred embodiment, the first drive gear set includes: a first driving gear is sleeved on the first driving component for synchronously rotating with the first driving component to transmit the first power; and a second driving gear is engaged with the first driving gear for being The first driving gear is driven to rotate, and the second driving gear comprises: a first segment gear meshing with the first driving gear; and a second segment gear formed by the first segment gear extending, and The first segment gear rotates synchronously; and a third drive gear meshes with the second segment gear for being rotated by the second segment gear.

In a preferred embodiment, the first transmission gear set includes: a first transmission gear disposed on a first transmission shaft of the first paper take-up module for driving the first power The first transmission shaft rotates; a second transmission gear is sleeved on the second transmission shaft of the first paper take-up module without rotating synchronously with the second transmission shaft, and the second transmission gear and the first The transmission gear is meshed to drive the first transmission gear to rotate according to the first power; a third transmission gear is sleeved on the second transmission shaft to rotate synchronously with the second transmission shaft and adjacent to the first transmission shaft a second transmission gear for being rotated by the planetary gear module when the planetary gear module is engaged with the planetary gear module, and driving the second transmission shaft to rotate; a fourth transmission gear meshing with the second transmission gear; a transmission gear meshing with the fourth transmission gear for being driven by the fourth transmission gear or being driven by the planetary gear module when meshing with the planetary gear module; a first linkage gear adjacent to the fourth gear a transmission gear and meshing with the third transmission gear And a second interlocking gear, adjacent to the fifth drive gear and engaged with the first interlocking gear It is used to be connected to the planetary gear module and is fixed.

In a preferred embodiment, when the fifth transmission gear meshes with the planetary gear module and is driven by the planetary gear module, the second linkage gear is coupled to the planetary gear module, and is coupled to the planetary gear module. The group is fixed without rotating or swinging, so that the first interlocking gear, the third transmission gear, the second transmission shaft, and the first pickup roller of one of the first paper take-up modules are fixed without rotating.

In a preferred embodiment, the second transmission gear set includes: a sixth transmission gear disposed on a third transmission shaft of the second paper take-up module for driving the first power The third transmission shaft rotates; a seventh transmission gear is sleeved on the fourth transmission shaft of the second paper take-up module without rotating synchronously with the fourth transmission shaft, and meshes with the sixth transmission gear, The sixth transmission gear is driven to rotate according to the first power; an eighth transmission gear is sleeved on the fourth transmission shaft and rotates synchronously with the fourth transmission shaft and adjacent to the seventh transmission gear. When engaged with the planetary gear module, the planetary gear module is rotated by the planetary gear module, and the fourth transmission shaft is driven to rotate; a ninth transmission gear is engaged with the seventh transmission gear; a tenth transmission gear, and the The ninth transmission gear meshes to be driven by the ninth transmission gear or is driven by the planetary gear module when meshing with the planetary gear module; a third linkage gear adjacent to the ninth transmission gear and The eighth transmission gear meshes; and a fourth connection Gear, adjacent to the tenth transmission gear and the third linking gear for the planetary gear is connected to the module to be immobilized.

In a preferred embodiment, when the tenth transmission gear meshes with the planetary gear module and is driven by the planetary gear module, the fourth linkage gear is connected to the planetary gear module, and is connected by the line. The star gear module is fixed without rotating or swinging, so that the third interlocking gear, the eighth transmission gear, the fourth transmission shaft, and the second pickup roller of the second paper take-up module are fixed without rotating .

In a preferred embodiment, the planetary gear module includes: a swinging plate between the first transmission gear set and the second transmission gear set for swinging in response to rotation of the first drive gear set; a sun gear disposed on the oscillating plate and engaged with the first driving gear set for being rotated by the first driving gear set and driving the oscillating plate to swing; a first planetary gear disposed on the swing And a first gear of the sun gear is engaged with the sun gear for engaging with one of the second transmission gear and the third transmission gear of the first transmission gear set, or Engaging with a seventh transmission gear and an eighth transmission gear of the second transmission gear set, and being driven by the sun gear to transmit the first power to the first transmission gear set or the second transmission gear set; a second planetary gear disposed on the oscillating plate and located on a second side of the sun gear to mesh with the sun gear for responsive to the swing of the oscillating plate and the fifth transmission gear of the first transmission gear set Cooperating with or engaging with a tenth transmission gear of the second transmission gear set, and being driven by the sun gear to transmit the first power to the first transmission gear set or the second transmission gear set; and a fixing component, And disposed on the oscillating plate and adjacent to the second planetary gear, for connecting with one of the first transmission gear sets, or one of the second transmission gear sets, according to the swing of the oscillating plate A fourth interlocking gear is coupled, and the second interlocking gear or the fourth linking gear is fixed without rotating or swinging.

In a preferred embodiment, the securing member is a notched gear.

In a preferred embodiment, the fixing element is extended by a rotating shaft of the swinging plate. One of the protruding columns.

In a preferred embodiment, the second power module includes: a second driving component for rotating to provide the second power; and a second driving gear set coupled to the second driving component for transmitting The second power shaft is coupled to the second drive gear set for being rotated by the second drive gear set and transmitting the second power; and a transmission module coupled to the second power a fifth drive shaft, the first paper take-up module, and the plurality of paper feed rollers for transmitting the second power to the first paper take-up module to make the first paper take-up module relative to the first paper feed path Swinging, and transmitting the second power to the plurality of paper feed rollers, so that the plurality of paper feed rollers feed the plurality of documents.

In a preferred embodiment, the transmission module includes: a sixth drive shaft coupled to the first paper take-up module for rotating to drive the first paper take-up module relative to the first paper feed path And a transmission belt coupled to the fifth transmission shaft, the sixth transmission shaft, and the plurality of paper feed roller shafts of the plurality of paper feed rollers for transmitting the second power to the sixth drive shaft and the plurality of paper feeds The roller shaft rotates the fifth transmission shaft, the sixth transmission shaft and the plurality of paper feed roller shafts synchronously.

In a preferred embodiment, the transmission module includes: a sixth drive shaft coupled to the first paper take-up module for rotating to drive the first paper take-up module relative to the first paper feed path And a transmission gear set coupled to the fifth drive shaft, the sixth drive shaft, and the plurality of paper feed roller shafts of the plurality of paper feed rollers for transmitting the second power to the sixth drive shaft and the plurality The paper feed roller shaft rotates the fifth drive shaft, the sixth drive shaft and the plurality of paper feed roller shafts synchronously.

Please refer to FIG. 3 and FIG. 4 simultaneously. FIG. 3 is a side view showing the structure of the double-sided paper-feeding scanning device of the present invention which has not been operated in a preferred embodiment, and FIG. 4 is a double-sided paper-feeding scanning of the present invention. A schematic diagram of a partial structure of a device in a preferred embodiment. The double-sided sheet-fed scanning device 2 is configured to scan an image of a plurality of documents S*. The double-sided sheet-fed scanning device 2 includes a scanning device 20 and an automatic paper feeder 21, and the automatic paper feeder 21 is disposed above the scanning device 20. The plurality of files S* are sequentially fed into the scanning device 21, and the scanning device 20 is used to sequentially read the images of the plurality of files S*. The automatic paper feeder 21 includes a paper feed cassette 22, a paper output cassette 23, a first paper feed path 24, a second paper feed path 25, a switch assembly 26, a first paper take-up module 27, and a second The paper take-up module 28, a paper feed channel 29, a flip channel 30, a plurality of paper feed rollers 31, a first power module 32, and a second power module 33.

In the automatic paper feeder 21, the paper feed cassette 22 is used to place a plurality of documents S* thereon, and the paper output cassette 23 is disposed below the paper feed cassette 22 for placing the scanned plurality of files S* thereon. The first paper feed path 24 is adjacent to the paper feed cassette 22 for passing the uppermost file S1* of the plurality of files S*, and the second paper feed path 25 is disposed below the first paper feed path 24 for One of the plural files S* passes through the bottom file Sn*. The switching assembly 26 is disposed between the first paper feed passage 24 and the second paper feed passage 25 and is swingable relative to the first paper feed passage 24 such that the uppermost document S1* is fed to the first paper feed passage 24 or the most The lower file Sn* enters the second paper feed path 25. The first paper take-up module 27 is located above the first paper feed path 24 and is swingable relative to the first paper feed path 24 for feeding the uppermost document S1* located on the paper feed cassette 22 into the first paper feed. The second paper take-up module 28 is disposed below the second paper feed path 25 for feeding the lowermost document Sn* located on the paper feed cassette 22 into the second paper feed path 25. Paper feed channel 29 setting In the automatic paper feeder 21 and between the paper feed cassette 22 and the paper discharge cassette 23, the plurality of documents S* are sequentially passed, wherein the paper feed path 29 passes through the scanning device 20. The flip channel 30 is connected to the paper feed channel 29 for sequentially passing the plurality of files S* and re-entering the scanning device 20, and the plurality of paper feed rollers 31 are disposed on the paper feed channel 29 for sequentially feeding the plurality of files S*. Scan device 20.

The first power module 32 is disposed in the automatic paper feeder 21 and is respectively connected to the first paper picking module 27, the second paper picking module 28 and the switching component 26 for providing a first power to the first paper picking The module 27, the second paper take-up module 28 and the switching component 26 are such that the first pick-up module 27 feeds the uppermost file S1*, the second pick-up module 28 feeds the lowermost file Sn*, or the switching component 26 is opposite. The first paper feed path 24 is swung. The second power module 33 is disposed in the automatic paper feeder 21 and is respectively connected to the first paper take-up module 27 and the plurality of paper feed rollers 31 for providing a second power to the first paper take-up module 27 and the plurality of paper feeds. The roller 31 causes the first paper take-up module 27 to swing relative to the first paper feed path 24, and the plurality of paper feed rollers 31 feed the plurality of documents S*.

Next, the connection relationship between the first paper take-up module 27, the second paper take-up module 28, the switch assembly 26, and the first power module 32 will be described. First, the structure of the first paper take-up module 27 will be described. Referring to FIG. 5, the first paper take-up module, the second paper take-up module, the switch assembly and the first power module of the double-sided paper feed type scanning device of the present invention are in a single-sided scan in a preferred embodiment. Schematic diagram of the state. The first paper take-up module 27 includes a paper take-up arm 271, a first drive shaft 272, a first paper feed roller 273, a second drive shaft 274, a first paper take-up gear set 275, and a first paper take-up Roller 276. The first transmission shaft 272 is connected to the first power module 31 for transmitting the first power from the first power module 31, and the pickup arm 271 is disposed on the first transmission shaft 272 and is not coupled to the first transmission. The shaft 272 rotates synchronously. The pick-up arm 271 is coupled to the second power module 33 for swinging relative to the first paper feed path 24 according to the second power from the second power module 33. The first separation roller 273 is disposed on the first transmission shaft 272 and rotates synchronously with the first transmission shaft 272 for feeding the uppermost document S1* located in the first paper feed passage 24 into the automatic paper feeder. In the 21st, or, the first separation roller 273 provides a first frictional force to the lowermost file Sn*.

In the first paper take-up module 27, the second drive shaft 274 is connected to the first power module 32 for transmitting the first power, and the first pick-up gear set 275 is partially disposed on the first drive shaft 272. A drive shaft 272 rotates synchronously, that is, one of the first paper take-up gear sets 275 (the first right take-up gear 2751 in FIG. 5) is disposed on the first drive shaft 272, but It does not rotate in synchronization with the first drive shaft 272. The first pick-up gear set 275 is coupled to the second drive shaft 274 for transmitting the first power. The first pick-up roller 276 is disposed on the pick-up arm 271 and is coupled to the first pick-up gear set 275 for feeding the uppermost document S1* located on the tray 22 into the first paper feed path 24, or The first paper take-up roller 276 is fixed and does not rotate in response to the second drive shaft 274 fixed by the first power module 32.

In FIG. 5, the first pick-up roller 276 has a first connecting gear 2761 adjacent to the first pick-up roller 276 and is coupled to the first pick-up roller 276 for driving the first pick-up roller 276 to rotate. The second transmission shaft 274 includes a second connecting gear 2741 disposed on the second transmission shaft 274 and coupled to the first power module 32 for being rotated by the second transmission shaft 274. When the second transmission shaft 274 rotates in a first rotation direction C1 according to the first power, the second connection gear 2741 rotates synchronously with the second transmission shaft 274 to drive the first pickup gear set 275 to rotate, and the first The paper take-up gear set 275 drives the first connecting gear 2761 to rotate, so that the first pick-up roller 276 rotates in a second rotation direction C2 opposite to the first rotation direction C1 to feed the uppermost file S1* into the first paper feed. Channel 24. The first transmission shaft 272 rotates the first separation roller 273 to the second rotation direction C2 to rotate the first separation roller 273 to the second rotation direction C2 to feed only one uppermost document S1* into the automatic feeder 21. Inside the paper channel 29. When the first transmission shaft 272 rotates in the first rotation direction C1 according to the first power, the first separation roller 273 rotates in the first rotation direction C1 to provide the first friction force to the lowermost file Sn*, and the second transmission The shaft 274 is fixed by the first power module 32 without rotation, so that the first pickup roller 276 is fixed without rotating.

Next, the structure of the second paper take-up module 28 will be described. In FIG. 5, the second paper take-up module 28 includes A third drive shaft 281, a second separation roller 282, a fourth drive shaft 283, a second pickup gear set 284, and a second pickup roller 285. The third transmission shaft 281 is connected to the first power module 31 for transmitting the first power from the first power module 31, and the second separation roller 282 is disposed on the third transmission shaft 281 and the third The drive shaft 281 rotates synchronously to feed a lowermost document Sn* located in the second paper feed path 25 into the automatic paper feeder 21, or the second paper separation roller 282 provides a second friction force to the uppermost file. S1*. The fourth drive shaft 283 is connected to the first power module 32 for transmitting the first power, and the second pick-up gear set 284 is partially disposed on the third drive shaft 281 without rotating synchronously with the third drive shaft 281, that is, One of the second paper take-up gear sets 284, the second paper take-out gear 2841 (the second right pick-up gear 2841 in FIG. 5) is disposed on the third drive shaft 281, but it is not synchronized with the third drive shaft 281. Turn. The second paper take-up gear set 284 is coupled to the fourth drive shaft 283 for transmitting the first power. The second paper take-up roller 285 is connected to the second paper take-up gear set 284 for feeding the lowermost file Sn* located on the paper feed cassette 22 into the second paper feed path 25, or the second paper take-up roller 285 is adapted. The fourth transmission shaft 283 fixed by the first power module 32 is fixed and does not rotate.

The second pick-up roller 285 has a third connecting gear 2851 adjacent to the second pick-up roller 285 and is connected to the second pick-up roller 285 for driving the second pick-up roller 285 to rotate. The fourth transmission shaft 283 includes a fourth connecting gear 2831, and is disposed on the fourth transmission shaft 283 and connected to the first power module 32 for synchronous rotation with the fourth transmission shaft 283. When the fourth transmission shaft 283 is rotated by the first rotation direction and the second rotation direction C2, the fourth connection gear 2831 drives the second pickup gear set 284 to rotate, and the second pickup gear set 284 drives the third connection gear. The rotation of 2851 causes the second pickup roller 285 to rotate in the first rotation direction C1 to feed the lowermost document Sn* into the second paper feed path 25. The third transmission shaft 281 rotates the first separation roller C1 to the first rotation direction C1, and the second separation roller 282 rotates to the first rotation direction C1 to feed only one lowermost file Sn* into the automatic feeder 21. Inside the paper channel 29. When the third transmission shaft 281 is rotated by the first power to the second rotation direction C2, the second separation roller 282 is rotated to the second rotation. The rotation direction C2 is rotated to provide a second frictional force to the uppermost document S1*, and the fourth transmission shaft 283 is fixed by the first power module 32 without rotating, so that the second pickup roller 285 is fixed without rotating.

Next, the structure of the switching unit 26 will be described. The switching component 26 includes a switching gear set 261, a switching shaft 262, a changeover switch 263, and a torque limiting component 264. The switching gear set 261 is coupled to the first power module 32 for transmitting the first power. The switching shaft 262 is connected to the switching gear set 261 for rotating in response to the first power. The switching switch 263 is disposed on the switching shaft 262 and can swing according to the rotation of the switching shaft 262 to open the first paper feeding passage 24 and close. The second paper feed path 25 or the second paper feed path 25 is opened to close the first paper feed path 24. The switching gear set 261 includes a first switching gear 2611 and a second switching gear 2612. The first switching gear 2611 is coupled to the first power module 32, and the second switching gear 2612 is disposed on the switching shaft 262 and coupled to the first switching gear 2611. Engaged to be rotated by the first switching gear 2611, and drive the switching shaft to rotate. The torque limiting element 264 is disposed in the second switching gear 2612 for controlling the switching shaft 262 not to be coupled to the second switching gear 2612 when the switching switch 263 is in contact with the first paper take-up module 27 or the second paper feed path 25 The rotation is synchronized, so that a strong impact between the changeover switch 263 and the first paper take-up module 27 or the second paper feed path 25 can be avoided.

In the switching unit 26, when the switching shaft 262 is rotated in the first rotation direction C1 in response to the first power, the changeover switch 263 is driven by the switching shaft 262 to swing in the first rotation direction C1 to open the second paper feed passage 25 and close. The first paper feed path 24 allows the lowermost file Sn* of the plurality of files S* to enter the second paper feed path 25. On the contrary, when the switching shaft 262 rotates in the second rotation direction C2 in response to the first power, the changeover switch 263 is driven by the switching shaft 262 to swing in the second rotation direction C2 to open the first paper feed passage 24 and close the second feed. The paper path 25 allows the uppermost file S1* of the plurality of files S* to enter the first paper feed path 24.

Next, the structure of the first power module 32 will be described. Please refer to FIG. 5 and FIG. 6. FIG. 6 is a schematic structural view of the first power module and the partial second power module of the double-sided paper-feeding scanning device according to another embodiment of the present invention. The first power module 32 includes a first a driving element 321, a first driving gear set 322, a first transmission gear set 323, a second transmission gear set 324 and a planetary gear module 325, wherein the first driving element 321 is rotated to provide a first power, In the preferred embodiment, the first drive element 321 is a drive motor. The first driving gear set 322 is coupled to the first driving component 322 for transmitting the first power. The first transmission gear set 323 is coupled to the first paper take-up module 27 for transmitting the first power to the first paper take-up mode. The second transmission gear set 324 is disposed below the first transmission gear set 323 and is coupled to the second paper take-up module 28 for transmitting the first power to the second paper take-up module 28. The planetary gear module 325 is coupled to the first drive gear set 322 and located between the first transfer gear set 323 and the second transfer gear set 324 for swinging in response to the first power and is coupled to the first transfer gear set 323 or Two transmission gear sets 324.

In the first driving gear set 322 , the first driving gear set 322 includes a first driving gear 3221 , a second driving gear 3222 and a third driving gear 3223 . The first driving gear 3221 is sleeved on the first driving component 321 . And rotating with the first driving element 321 to transmit the first power. The second driving gear 3222 is meshed with the first driving gear 3221 for rotation by the first driving gear 3221, and the second driving gear 3222 includes a first segment gear 3222A and a second segment gear 3222B. The first stage gear 3222A is meshed with the first drive gear 3221, and the second stage gear 3222B is formed by the extension of the first stage gear 3222A and rotates synchronously with the first stage gear 3222A. In the preferred embodiment, the second The segment gear 3222B is integrally formed with the first segment gear 3222A. The third drive gear 3223 is meshed with the second segment gear 3222B for being rotated by the second segment gear 3222B.

Please refer to FIG. 5, FIG. 6, FIG. 7, and FIG. 8. FIG. 7 is a partial structural diagram of the first power module of the double-sided paper-feeding scanning device of the present invention in a single-sided scanning state in a preferred embodiment. FIG. 8 is a partial structural diagram of the first power module of the double-sided sheet-fed scanning device of the present invention in a single-sided scanning state in another preferred embodiment. The first transmission gear set 323 includes a first transmission gear 3231, a second transmission gear 3232, and a third transmission gear. 3233, a fourth transmission gear 3234, a fifth transmission gear 3235, a first linkage gear 3236 and a second linkage gear 3237. The first transmission gear 3231 is sleeved on the first transmission shaft 272 of the first paper take-up module 27 for driving the first transmission shaft 272 to rotate according to the first power, and the second transmission gear 3232 is sleeved on the first The second transmission shaft 274 of the paper take-up module 27 is rotated synchronously with the second transmission shaft 274, and the second transmission gear 3232 is meshed with the first transmission gear 3231 for driving the first transmission gear 3231 in response to the first power. Turn. The third transmission gear 3233 is sleeved on the second transmission shaft 274 and rotates synchronously with the second transmission shaft 274 and adjacent to the second transmission gear 3232 for being driven by the planetary gear module 325 when meshing with the planetary gear module 325. Rotating, and driving the second transmission shaft 274 to rotate. The fourth transmission gear 3234 is meshed with the second transmission gear 3232, and the fifth transmission gear 3235 is meshed with the fourth transmission gear 3234 for being driven by the fourth transmission gear 3234, or the fifth transmission gear 3235 and the planetary gear module When the 325 is engaged, it is driven by the planetary gear module 325.

The first interlocking gear 3236 is adjacent to the fourth transmission gear 3234 and meshes with the third transmission gear 3233, and the second linkage gear 3237 is adjacent to the fifth transmission gear 3235 and meshes with the first linkage gear 3236. When the fifth transmission gear 3235 is meshed with the planetary gear module 325 and driven by the planetary gear module 325, the second linkage gear 3237 meshes with the planetary gear module 325, and is fixed by the planetary gear module 325 without rotating, so that The interlocking gear 3236, the third transmission gear 3233, the second transmission shaft 274, and the first pickup roller 276 of the first paper take-up module 27 are fixed without rotating.

The second transmission gear set 324 includes a sixth transmission gear 3241, a seventh transmission gear 3242, an eighth transmission gear 3243, a ninth transmission gear 3244, a tenth transmission gear 3245, a third linkage gear 3246, and a The fourth interlocking gear 3247. The sixth transmission gear 3241 is sleeved on the third transmission shaft 281 of the second paper take-up module 28 for driving the third transmission shaft 281 in response to the first power, and the seventh transmission gear 3242 is sleeved in the second The fourth drive shaft 283 of the paper take-up module 28 does not rotate synchronously with the fourth drive shaft 283, and the seventh drive gear 3242 and the The six transmission gears 3241 are meshed to drive the sixth transmission gear 3241 to rotate in response to the first power. The eighth transmission gear 3243 is sleeved on the fourth transmission shaft 283 and rotates synchronously with the fourth transmission shaft 283 and adjacent to the seventh transmission gear 3242 for being driven by the planetary gear module 325 when meshing with the planetary gear module 325. Rotating, and driving the fourth transmission shaft 283 to rotate. The ninth transmission gear 3244 is meshed with the seventh transmission gear 3242, and the tenth transmission gear 3245 is meshed with the ninth transmission gear 3244 for being driven by the ninth transmission gear 3244, or the tenth transmission gear 3245 and the planetary gear module When the 325 is engaged, it is driven by the planetary gear module 325.

The third interlocking gear 3246 is adjacent to the ninth transmission gear 3244 and meshes with the eighth transmission gear 3243, and the fourth linkage gear 3247 is adjacent to the tenth transmission gear 3245 and meshes with the third interlocking gear 3246. When the tenth transmission gear 3245 is meshed with the planetary gear module 325 and driven by the planetary gear module 325, the fourth linkage gear 3247 is coupled to the planetary gear module 325, and is fixed by the planetary gear module 325 without being rotated. The third interlocking gear 3246, the eighth transmission gear 3243, the fourth transmission shaft 283, and the second pickup roller 285 of the second pickup module 28 are fixed without rotating.

Next, the structure of the planetary gear module 325 will be described. Please refer to FIG. 7 and FIG. 9 simultaneously. FIG. 9 is a partial exploded structural view of the planetary gear module of the first power module of the double-sided paper-feed scanning device of the present invention in a preferred embodiment. The planetary gear module 325 includes a swinging plate 3251, a sun gear 3252, a first planetary gear 3253, a second planetary gear 3254, and a fixing member 3255. The swinging plate 3251 is located between the first transmission gear set 323 and the second transmission gear set 324 for swinging in response to the rotation of the first driving gear set 322. The sun gear 3252 is disposed on the swinging plate 3251 and coupled to the first driving gear set. The 322 is engaged to be rotated by the first driving gear set 322 and drives the swinging plate 3251 to swing. The first planetary gear 3253 is disposed on the swing plate 3251 and is located on a first side of the sun gear 3252 to engage with the sun gear 3252 for responding to the swing of the swing plate 3251 and the second transmission gear 3232 of the first transmission gear set 323. And the third transmission gear 3233 is engaged, and transmits the first power to the first transmission gear set 323. Alternatively, the first planetary gear 3253 meshes with the seventh transmission gear 3242 and the eighth transmission gear 3243 of the second transmission gear set 324 to transmit the first power to the second transmission gear set 324.

The second planetary gear 3254 is disposed on the swing plate 3251 and is located on a second side of the sun gear 3252 to engage with the sun gear 3252 for responding to the swing of the swing plate 3251 and the fifth transmission gear 3235 of the first transmission gear set 323. Engaged by the sun gear 3252 to transmit the first power to the first transmission gear set 323, or the second planetary gear 3254 meshes with the tenth transmission gear 3245 of the second transmission gear set 324, and is driven by the sun gear 3252 The first power is transmitted to the second transmission gear set 324. The fixing member 3255 is disposed on the swinging plate 3251 and adjacent to the second planetary gear 3254 for engaging with the second interlocking gear 3237 in response to the swing of the swinging plate 3251, and the second interlocking gear 3237 is fixed without rotating, or The fixing member 3255 is coupled to the seventh interlocking gear 3247, and the fourth interlocking gear 3247 is fixed without rotating. In the preferred embodiment, the securing member 3255 is a notched gear 3255 such that the securing member 3255 is not in contact with the sun gear 3252.

It should be noted that the second planetary gear 3254 and the fixing component 3255 are sleeved on one of the rotating shafts 3251A of the swinging plate 3251, and the fixing component 3255 is fixed on the rotating shaft 3251A, and the rotating shaft 3251A corresponds to the fixing component 3255. The position is provided with at least one bump 3251B, and the fixing member 3255 is also provided with at least one groove 3255A corresponding to at least one bump 3251B, as shown in FIG. When the fixing member 3255 is sleeved on the rotating shaft 3251A, the projection 3251B protrudes into the corresponding recess 3255A, so that the fixing member 3255 is fixed to the rotating shaft 3251A without rotating. The second planetary gear 3254 is sleeved on the rotating shaft 3251A and rotatable relative to the rotating shaft 3251A. In addition, the second planetary gear 3254 further includes a further torque limiting component for providing a torque and a first separation roller 273 when the planetary gear module 325 is coupled to the fifth transmission gear 3235, so that the first separation roller 273 The first frictional force is supplied to the uppermost document S1*, or the torque is provided to the second separation roller 282 when the planetary gear module 325 is coupled to the tenth transmission gear 3245, so that the second separation roller 282 can be provided. Two friction Give the bottom file Sn*.

Next, the structure of the second power module 33 will be described. Please refer to FIG. 6 and FIG. 10 simultaneously. FIG. 10 is a partial structural diagram of a second power module of the double-sided paper-feeding scanning device of the present invention in a preferred embodiment. The second power module 33 includes a second driving component 331, a second driving gear set 332, a fifth transmission shaft 333, and a transmission module 334. The second drive element 331 is configured to rotate to provide a second power. In the preferred embodiment, the second drive element 331 is a drive motor. The fifth drive shaft 333 is coupled to the second drive gear set 332 for being rotated by the second drive gear set 332 and transmitting the second power. The transmission module 334 is connected to the fifth transmission shaft 333, the first paper take-up module 27, and the plurality of paper feed rollers 31 for transmitting the second power to the first paper take-up module 27 so that the first paper take-up module 27 is opposite. The first paper feed path 24 is swung, and the transmission module 334 transmits the second power to the plurality of paper feed rollers 31, so that the plurality of paper feed rollers 31 feed the plurality of documents.

In the second drive gear set 332, the second drive gear set 332 is coupled to the second drive element 331 for transmitting the second power, and the second drive gear set 332 includes a fourth drive gear 3321, a fifth drive gear 3322, and A sixth driving gear 3323, the fourth driving gear 3321 is sleeved on the second driving component 331 for synchronous rotation with the second driving component 331 to transmit the second power. The fifth drive gear 3322 is meshed with the fourth drive gear 3321 for rotation by the fourth drive gear 3321, and the fifth drive gear 3322 includes a further first segment gear 3322A and a further second segment gear 3322B. The other first segment gear 3322A is meshed with the fourth drive gear 3321, and the other second segment gear 3322B is formed by the extension of the other first segment gear 3322A and rotates synchronously with the other first segment gear 3322A. In the preferred embodiment, the other second segment gear 3322B is integrally formed with the other first segment gear 3322A. The sixth drive gear 3323 is meshed with the other second segment gear 3322B for being rotated by the other second segment gear 3322B.

In the transmission module 334, the transmission module 334 includes a sixth transmission shaft 3341 and a transmission. The belt 3342 and the sixth transmission shaft 3341 are connected to the first paper take-up module 27 for rotating to drive the first paper take-up module 27 to swing relative to the first paper feed passage 24. The transmission belt 3342 is connected to the fifth transmission shaft 333, the sixth transmission shaft 3341, and the plurality of paper feed roller shafts 311 of the plurality of paper feed rollers 31 for transmitting the second power to the sixth transmission shaft 3341 and the plurality of paper feed roller shafts 311. The fifth drive shaft 333, the sixth drive shaft 3341, and the plurality of paper feed roller shafts 311 are synchronously rotated.

As can be seen from FIG. 10, a part of the paper feed roller 31 is disposed on the fifth transmission shaft 333 and rotates in synchronization with the fifth transmission shaft 333. The other paper feed rollers 31 are disposed on the plurality of paper feed roller shafts 311 and rotate in synchronization with the plurality of paper feed roller shafts 311. Therefore, the rotation of the plurality of paper feed rollers 31 is the fifth drive shaft 333 and the plurality of paper feed roller shafts 311 operate in response to the second power.

Next, the operation of the double-sided sheet-fed scanning device 2 for single-sided scanning will be described. Please refer to FIG. 3 to FIG. 11. FIG. 11 is a schematic side view showing the structure of the double-sided sheet-fed scanning device of the present invention in a single-sided scanning state in a preferred embodiment. First, FIG. 3 shows that when the double-sided sheet-fed scanning device 2 is not in operation, the pickup arm 271 is located above the first paper feed path 24 and the second paper feed path 25 and away from the paper feed cassette 22, so that the plurality of documents S * Can be placed on the tray 22. After the plural document S* is placed on the tray 22, the pickup arm 271 is not in contact with the plural document S*.

In FIG. 5 and FIG. 6, when the double-sided sheet-fed scanning device 2 is to perform single-sided scanning on the plurality of files S*, the first driving element 321 is rotated in the second rotation direction C2 to make the first driving gear 3221 to the second direction. When the rotation direction C2 is rotated, the second drive gear 3222 is driven by the first drive gear 3221 to rotate in the first rotation direction C1, and the third drive gear 3223 is driven by the second drive gear 3222 to rotate in the second rotation direction C2. The first switching gear 2611 meshed with the third driving gear 3223 is driven to rotate in the first rotational direction C1, and the second switching gear 2612 is driven by the first switching gear 2611 to rotate in the second rotational direction C2, so that the switching shaft 262 is rotated. In response to the first power, the second switching gear 2612 is rotated in the second rotation direction C2, and the switching switch 263 is driven by the switching shaft 262 to swing in the second rotation direction C2 to open the first paper feed passage 24 and close the second. Paper feed path 25.

On the other hand, in FIGS. 6 and 10, the second drive element 331 is rotated in the first rotational direction C1 to rotate the fourth drive gear 3321 in the first rotational direction C1, and the fifth drive gear 3322 is driven by the fourth drive gear 3321. And rotating in the second rotation direction C2, the fifth driving gear 3323 is driven by the fourth driving gear 3322 to rotate in the first rotation direction C1, so that the fifth transmission shaft 333 and the fifth driving gear 3323 are synchronized to the first rotation direction C1. The plurality of paper feed rollers 31 that are rotated and disposed on the fifth drive shaft 333 are also rotated in the first rotation direction C1 (since the angle of view of FIG. 10 is different from that of FIG. 6, the first rotation direction C1 shown in FIG. Contrary to the first rotational direction C1 shown in FIG. 6, in fact, the first rotational direction C1 in the two figures is the same). In response to the fifth transmission shaft 333 rotating in the first rotation direction C1, the transmission belt 3342 connected to the fifth transmission shaft 333, the sixth transmission shaft 3341, and the plurality of paper feed roller shafts 311 is driven to transmit the second power, and the transmission belt 3342 The sixth drive shaft 3341 and the plurality of paper feed roller shafts 311 are rotated in the first rotation direction C1, so that the plurality of paper feed rollers 31 on the plurality of paper feed roller shafts 311 are also rotated in the first rotation direction C1.

In the preferred embodiment, the pick-up arm 271 includes a shifting gear set 2711 coupled to the sixth drive shaft 3341 for aligning the direction of rotation of the pick-up arm 271 with the direction of rotation of the six drive shafts 3341. By the setting of the switching gear set 2711, the pickup arm 271 connected to the sixth transmission shaft 3341 is swung relative to the first paper feed passage 24 in the second rotation direction C2, that is, the pickup arm 271 is close to the paper feed cassette. The direction of 22 is swung, and the first pickup roller 276 disposed on the pickup arm 271 is in contact with the uppermost file S1* of the plurality of files S*, as shown in FIG.

The first pickup roller 276 feeds the uppermost document S1* in contact with the first paper feed passage 24 in response to the first power, and the first powertrain is transmitted from the first drive member 321 to the first pickup roller 276, which is related. The components operate as follows. The first driving element 321 performs the operation as described above to transmit the first power to the third driving gear 3223, the third driving gear 3223 to rotate in the second rotational direction C2, and the sun gear 3252 that meshes with the third driving gear 3223. It is driven to rotate in the first rotation direction C1. According to the rotation of the sun gear 3252 to the first rotation direction C1 The swinging plate 3251 is swung to engage the first planetary gear 3253 disposed on the swinging plate 3251 with the second transmission gear 3232 and the third transmission gear 3233, and the first planetary gear 3253 is rotated in the second rotational direction C2, and the second transmission The gear 3232 and the third transmission gear 3233 are rotated in the first rotational direction C1. The second transmission gear 3232 drives the first transmission gear 3231 to rotate in the second rotation direction C2, and the first transmission shaft 272 and the first separation roller 273 rotate in synchronization with the first transmission gear 3231 in the second rotation direction C2. The fourth transmission gear 3234 that meshes with the second transmission gear 3232 is idling, and the fifth transmission gear 3235 that meshes with the fourth transmission gear 3234 is also idling.

On the other hand, in response to the rotation of the third transmission gear 3233 in the first rotational direction C1, the second transmission shaft 274 rotates in synchronization with the third transmission gear 3233 in the first rotational direction C1, and the second connection on the second transmission shaft 274 The gear 2741 rotates in the first rotation direction C1 in synchronization with the second transmission shaft 274, so that the first pickup gear 2751 disposed on the first transmission shaft 272 is rotated by the second connection gear 2741, and the first pickup gear set 275 is driven to rotate. The first connecting gear 2761 meshing with the first pick-up gear set 275 is also driven to rotate in the second rotational direction C2, and drives the first pick-up roller 276 to rotate in the second rotational direction C2, so that the first pick-up roller 276 It is possible to feed the uppermost document S1* into the first paper feed path 24. As for the first interlocking gear 3236 that meshes with the third transmission gear 3233, the second interlocking gear 3237 that meshes with the first interlocking gear 3236 is also idling.

The first planetary gear 3253 meshes with the second transmission gear 3232 and the third transmission gear 3233 in response to the swing of the swinging plate 3251, the second planetary gear 3254 meshes with the tenth transmission gear 3245, and is adjacent to the second planetary gear 3254. The fixing member 3255 is engaged with the fourth interlocking gear 3247 as shown in FIG. In the tenth transmission gear 3245, the tenth transmission gear 3245 is driven by the second planetary gear 3254 rotating in the second rotation direction C2 to rotate in the first rotation direction C1, so that the ninth transmission gear 3244 meshing with the tenth transmission gear 3245 a seventh transmission gear 3242 that is driven to rotate in the second rotational direction C2 and meshes with the ninth transmission gear 3244 Driven by the first rotation direction C1, and the seventh transmission gear 3242 drives the sixth transmission gear 3241 to rotate in the second rotation direction C2, so that the third transmission shaft 281 is driven by the sixth transmission gear 324 and the second rotation direction C2 rotates, and the second separation roller 282 disposed on the third transmission shaft 281 rotates in synchronization with the third transmission shaft 281 to the second rotation direction C2, and provides a second friction force to the uppermost file S1*, but is disposed on The second pickup gear 2841 on the third transmission shaft 281 is not rotated in synchronization with the third transmission shaft 281. The function of the second separation roller 282 is an active friction wheel, which cooperates with the first separation roller 273 so that only one document S* can be fed into the paper feed passage 29 at a time.

On the other hand, since the fourth interlocking gear 3247 is engaged with the fixing member 3255, the fourth interlocking gear 3247 is fixed by the fixing member 3255 without rotating, that is, the fourth interlocking gear 3247 is not rotated in synchronization with the fixing member 3255. The third interlocking gear 3246 meshing with the fourth interlocking gear 3247 is also fixed by the fourth interlocking gear 3247 without rotating, and the eighth transmission gear 3243 meshing with the third interlocking gear 3246 is also fixed by the third interlocking gear 3246 without rotating. . The fourth transmission shaft 283 connected to the eighth transmission gear 3243 is fixed by the eighth transmission gear 3243 without rotating, and the fourth connecting gear 2831 disposed on the fourth transmission shaft 283 is also fixed without rotating, so that the fourth The second pickup gear set 284 to which the connecting gear 2831 is engaged is fixed without rotating, and the second pickup roller 285 is also fixed without being rotated. Therefore, the second pickup roller 285 that does not rotate contacts the lowermost file Sn* of the plurality of files S*, and does not feed the lowermost file Sn* to cause double feed.

According to the above operation, the uppermost document S1* is fed from the paper feed cassette 22 into the first paper feed path 24 and the paper feed path 29, and in the paper feed path 29, the plurality of paper feed rollers 31 located therein are in the first rotation direction. C1 rotates to feed the uppermost file S1* into the scanning device 20, so that the scanning device 20 reads the single-sided image of the uppermost file S1*, and after the uppermost file S1* is scanned, it is fed to the paper output by the plurality of paper feed rollers 31.匣 23. Finally, the remaining plurality of files S* on the tray 22 are subjected to the same operation for single-sided scanning, and the remaining plural files S* are sequentially fed. The paper tray 23 is on. Single-sided scanning of the complex file S* is completed.

Next, the case where the double-sided sheet-fed scanning device 2 performs double-sided feeding will be described. When the double-sided sheet-fed scanning device 2 is not in operation, the pickup arm 271 is located above the first paper feed path 24 and the second paper feed path 25 and is not in contact with the plurality of documents S* placed on the paper feed cassette 22, As shown in Figure 3. Please refer to FIG. 13 and FIG. 14 simultaneously. FIG. 13 is a side view showing the structure of the double-sided paper-feeding scanning device of the present invention in a double-sided scanning state in a preferred embodiment, and FIG. 14 is a double-sided feeding of the present invention. A first schematic diagram of the first power module of the paper scanning device in a double-sided scanning state in a preferred embodiment. When the double-sided sheet-fed scanning device 2 is to perform double-sided scanning on the plurality of documents S*, the first driving element 321 is rotated in the first rotation direction C1 to rotate the first driving gear 3221 in the first rotation direction C1, and second. The drive gear 3222 is driven by the first drive gear 3221 to rotate in the second rotational direction C2, and the third drive gear 3223 is driven by the second drive gear 3222 to rotate in the first rotational direction C1. The first switching gear 2611 meshing with the third driving gear 3223 is driven to rotate in the second rotation direction C2, and the second switching gear 2612 is driven by the first switching gear 2611 to rotate in the first rotation direction C1, so that the switching shaft 262 is rotated. In response to the first power, the second switching gear 2612 rotates in the first rotation direction C1, and the switching switch 263 is driven by the switching shaft 262 to swing in the first rotation direction C1 to open the second paper feed passage 25 to close the first Paper feed path 24.

As for the second power module 33, the second power module 33 performs the same operation as the single-sided scanning, so that the pick-up arm 271 swings in the direction close to the paper feed cassette 21, and is disposed on the pick-up arm 271. A pickup roller 276 is in contact with the uppermost file S1* of the plurality of files S*, and the second pickup roller 285 is also in contact with the lowermost file Sn* of the plurality of files S*, as shown in FIG.

The second pickup roller 285 feeds the lowermost document Sn* in contact with the second paper feed passage 25 in response to the first power, and the first powertrain is transmitted from the first driving member 321 to the second pickup roller 285, which is related. The components operate as follows. Please refer to FIG. 14 and FIG. 15. FIG. 15 is a second embodiment of the first transmission gear set of the first power module of the double-sided paper feeding type scanning device of the present invention. In the example, a partial structure diagram of a double-sided scanning state is shown. The first driving element 321 performs the operation as described above to transmit the first power to the third driving gear 3223, the third driving gear 3223 to rotate in the first rotational direction C1, and the sun gear 3252 that meshes with the third driving gear 3223. It is driven to rotate in the second rotation direction C2. In response to the rotation of the sun gear 3252 in the second rotational direction C2, the swinging plate 3251 is swung to engage the first planetary gear 3253 disposed on the swinging plate 3251 with the seventh transmitting gear 3242 and the eighth transmitting gear 3243.

The seventh transmission gear 3242 and the eighth transmission gear 3243 are driven by the first planetary gear 3253 rotating in the first rotational direction C1 to rotate in the second rotational direction C2, so that the sixth transmission gear 3241 meshed with the seventh transmission gear 3242 is Rotating to the first rotation direction C1, the third transmission shaft 281 is driven by the sixth transmission gear 324 to rotate in the first rotation direction C1, and the second separation roller 282 and the third disposed on the third transmission shaft 281 The drive shaft 281 is rotated in synchronization with the first rotational direction C1. As for the ninth transmission gear 3244 that meshes with the seventh transmission gear 3242, the tenth transmission gear 3245 that meshes with the ninth transmission gear 3244 is also idling.

On the other hand, the eighth transmission gear 3243 rotating in the second rotation direction C2 drives the fourth transmission shaft 283 to rotate in the second rotation direction C2, and the fourth connecting gear 2831 and the fourth transmission shaft 283 on the fourth transmission shaft 283. The rotation is synchronously rotated to the second rotation direction C2. Next, the second pickup gear 2841 disposed on the third transmission shaft 281 is rotated by the fourth connecting gear 2831, and the second pickup gear set 284 is driven to rotate. The third connecting gear 2851 that meshes with the second pick-up gear set 284 is also driven to rotate in the first rotational direction C1, and drives the second pick-up roller 285 to rotate in the first rotational direction C1, so that the second pick-up roller 285 It is possible to feed the lowermost file Sn* into the second paper feed path 25. The third interlocking gear 3246 that meshes with the eighth transmission gear 3243 is idling, and the fourth interlocking gear 3247 that meshes with the third interlocking gear 3246 is also idling.

While the first planetary gear 3253 is meshed with the seventh transmission gear 3242 and the eighth transmission gear 3243, the second planetary gear 3254 disposed on the swing plate 3251 is meshed with the fifth transmission gear 3235 and adjacent to the second planetary gear. 3254 fixed component 3255 and second interlocking tooth Wheel 3237 is engaged. In response to the rotation of the second planetary gear 3254 in the first rotational direction C1, the fifth transmission gear 3235 is driven to rotate in the second rotational direction C2, and the fourth transmission gear 3234 meshing with the fifth transmission gear 3235 is also driven to the A rotation direction C1 is rotated, and the second transmission gear 3232 engaged with the fourth transmission gear 3234 is driven to rotate in the second rotation direction C2. The first transmission gear 3231 meshing with the second transmission gear 3232 is driven to rotate in the first rotation direction C1, so that the first transmission shaft 272 is driven by the first transmission gear 3231 to rotate in the first rotation direction C1, and is set in the first The first separation roller 273 on a transmission shaft 272 rotates in synchronization with the first transmission shaft 272 in the first rotation direction C1 to provide a first frictional force to the lowermost file Sn*, but is disposed on the first transmission shaft 272. The first pickup gear 2751 does not rotate in synchronization with the first transmission shaft 272. The function of the first separation roller 273 is an active friction wheel that operates in conjunction with the second separation roller 282 so that only one document S* can be fed into the paper feed passage 29 at a time.

On the other hand, since the fixing member 3255 is engaged with the second interlocking gear 3237, since the second interlocking gear 3237 is engaged with the fixing member 3255, the second interlocking gear 3237 is fixed by the fixing member 3255 without rotating, that is, the second interlocking gear. The 3237 does not rotate in synchronization with the fixed member 3255. The first interlocking gear 3236 meshing with the second interlocking gear 3237 is also fixed by the second interlocking gear 3237 without rotating, and the third transmission gear 3233 engaged with the first interlocking gear 3236 is also fixed by the first interlocking gear 3236 without rotating. . The second transmission shaft 274 connected to the third transmission gear 3233 is fixed by the third transmission gear 3233 without rotation, and the second connecting gear 2741 disposed on the second transmission shaft 274 is also fixed without rotating, so that The first pickup roller group 275 engaged with the connecting gear 2741 is fixed without rotating, and the first pickup roller 276 is also fixed without rotating, as shown in FIG. Therefore, the first pickup roller 276 that does not rotate contacts the uppermost file S1* of the plurality of files S*, and does not feed the uppermost document S1* to cause double feed.

According to the above operation, the lowermost document Sn* is fed from the paper feed cassette 22 into the second paper feed path 25 and the paper feed path 29, in the paper feed path 29, the plurality of paper feed rollers located therein 31 rotates in the first rotation direction C1 to feed the lowermost file Sn* into the scanning device 20, so that the scanning device 20 reads the first image of the lowermost file Sn* (that is, the lowermost file Sn* in FIG. 12 faces upward) On the one hand, after the first side of the lowermost file Sn* is scanned, the lowermost file Sn* is fed by the plurality of paper feed rollers 31 so that the lowermost file Sn* is close to the paper output tray 23, but the lowermost file Sn* has not yet been Located on the paper tray 23. At this time, the second drive element 331 is reversed and rotated in the second rotational direction C2.

Referring to FIG. 6 and FIG. 10 again, when the second driving element 331 rotates in the first rotation direction C1, the fourth driving gear 3321 is rotated in the first rotation direction C1, and the fifth driving gear 3322 is driven by the fourth driving gear 3321. And rotating in the second rotation direction C2, the sixth driving gear 3323 is driven by the fifth driving gear 3322 to rotate in the first rotation direction C1, so that the fifth transmission shaft 333 and the sixth driving gear 3323 are synchronized to the first rotation direction C1. The plurality of paper feed rollers 31 that are rotated and disposed on the fifth drive shaft 333 are also rotated in the first rotational direction C1. In response to the fifth transmission shaft 333 rotating in the first rotation direction C1, the transmission belt 3342 connected to the fifth transmission shaft 333, the sixth transmission shaft 3341, and the plurality of paper feed roller shafts 311 is driven to transmit the second power, and the transmission belt 3342 The sixth drive shaft 3341 and the plurality of paper feed roller shafts 311 are rotated in the first rotation direction C1, so that the plurality of paper feed rollers 31 on the plurality of paper feed roller shafts 311 are also rotated in the first rotation direction C1. At this time, the lowermost file Sn* is fed into the inversion channel 30 by the plurality of paper feed rollers 31, and the lowermost file Sn* enters the scanning device 20 again, so that the scanning device 20 reads the second image of the lowermost file Sn* (Fig. The lowermost document Sn* of 12 is oriented toward the lower side, and after the second side of the lowermost file Sn* is scanned, the plurality of paper feed rollers 31 are fed to the paper discharge cassette 23. The double-sided scanning of the bottom file Sn* is completed.

Finally, the remaining plurality of files S* on the tray 22 are subjected to the same operation for duplex scanning, and the remaining plurality of files S* are sequentially fed onto the sheet bundle 23. Duplex scanning of the plural file S* is completed.

Specifically, there are two, first, the first rotation direction C1 described in the preferred embodiment. The clockwise direction is the clockwise direction, and the second rotation direction C2 is the counterclockwise direction. However, in the preferred embodiment, when the first driving element 321 is rotated in the first rotation direction C1, the switch 263 is opened to open the second paper feed path. 25, the first pickup roller 276 is fixed without rotating, and the first separation roller 273 tends to rotate in the first rotational direction C1 or the like. In fact, the direction of rotation of the first drive element and the direction of oscillation or direction of rotation of the above-described elements will vary depending on the number of gears provided for each element and the manner in which the gears are connected. The second driving element 331 of the second power module 33 is also the same.

Secondly, in the preferred embodiment, the first separation roller 273 and the second separation roller 282 can be used as active friction wheels, and in another preferred embodiment, the first separation roller and the second separation roller. The paper roller can be used as a passive friction wheel, and the first power module needs to be modified accordingly.

Moreover, the present invention further provides a further preferred embodiment. Please refer to FIG. 16 , which is a partial structural diagram of a first power module of a double-sided paper-feed scanning device according to another preferred embodiment of the present invention. Similar to the preferred embodiment described above, the double-sided sheet-fed scanning device of the preferred embodiment includes a scanning device and an automatic paper feeder, and the automatic paper feeder includes a paper feed cassette, a paper output cassette, and a first input. a paper channel, a second paper feed channel, a switching component, a first paper take-up module, a second paper take-up module, a paper feed channel, a flip channel, a plurality of paper feed rollers, and a first power module And a second power module. The first power module 42 includes a first driving component, a first driving gear set, a first transmission gear set 423, a second transmission gear set 424, and a planetary gear module 425, and the second power module includes a second driving component, a second driving gear set, a fifth transmission shaft and a transmission module. The structure of the double-sided sheet-fed scanning device of the preferred embodiment is substantially the same as that of the above-described preferred embodiment, and therefore, the double-sided sheet-fed scanning device of the preferred embodiment and the above preferred embodiment are not described. The difference is the planetary gear module 425 and the transmission module of the second power module.

In the planetary gear module 425, the planetary gear module 425 includes a swinging plate 4251 and a sun. a gear 4252, a first planetary gear 4253, a second planetary gear (not shown), and a fixing member 4255, a swinging plate 4251 of the planetary gear module 425, a sun gear 4252, a first planetary gear 4253, and a second planet The structure of the gears is the same as that of the preferred embodiment described above, but differs in the fixing member 4255. In the preferred embodiment, the fixing member 4255 is a two-protrusion column formed by extending one of the other rotating shafts of the swinging plate 4251, and the two protruding posts 4255 are integrally formed with the swinging plate 4251. The structure of the first transmission gear set 423 and the second transmission gear set 424 connected to the planetary gear module 425 are the same as those of the above preferred embodiment, except that the second interlocking gear 4237 connected to the fixing member 4255 and The fourth interlocking gears 4247 respectively have a plurality of openings (not shown) corresponding to the protruding posts 4255 for connecting with the protruding posts 4255 to be fixed by the protruding posts 4255 without rotating.

In addition, the transmission module of the second power module includes a sixth transmission shaft and a transmission gear set, the sixth transmission shaft is connected to the first paper take-up module, and the transmission gear set is connected to the fifth transmission shaft and the sixth transmission shaft. And a plurality of paper feed roller shafts of the plurality of paper feed rollers for transmitting the second power to the sixth drive shaft and the plurality of paper feed roller shafts, so that the fifth drive shaft, the sixth drive shaft and the plurality of paper feed roller shafts rotate synchronously.

According to the above, the double-sided paper feed type scanning device of the present invention is provided with two sets of paper take-up modules and two paper feed channels. When the double-sided paper feed type scanning device performs single-sided scanning, the first paper take-up module and the first A paper feed path feeds the document, and a second paper feed roller of the second paper take-up module is used as a friction wheel for single-sided scanning of the document. When the double-sided paper-feeding scanning device performs double-sided scanning, the second paper-feeding module and the second paper-feeding path are used to feed the document, and the first paper-feeding roller of the first paper-removing module is used as the friction wheel for performing Double-sided scanning of files. In the process of double-sided scanning by the double-sided paper-feeding scanning device of the present invention, the document only needs to pass through the scanning device twice, so that the working speed can be improved. Furthermore, the double-sided sheet-fed scanning device of the present invention is provided with only two driving elements, and controls the first paper taking roller, the first paper separating roller, the second paper taking roller, and the second paper separating roller by using the first driving component. Rotate and switch the swing of the switch, and control with the second drive element The rotation of the plurality of paper feed rollers and the swing of the pickup arm. Therefore, the double-sided paper-feeding scanning device of the invention not only has a faster working speed, but also controls the operation of the plurality of components by the two driving elements and the gear set without setting a plurality of driving components, thereby saving multiple driving. The cost of the component.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, any equivalent changes or modifications made without departing from the spirit of the present invention should be included in the present invention. Within the scope of the patent application.

1, 2‧‧‧Double-fed paper scanning device

10, 20‧‧‧Automatic feeder

11, 21‧‧‧ Scanning device

22, 101‧‧ ‧ paper tray

23, 102‧‧‧ paper output

24‧‧‧First paper path

25‧‧‧Second paper feed channel

26‧‧‧Switching components

27‧‧‧First paper take-up module

28‧‧‧Second paper take-up module

29, 104‧‧ ‧ paper feeding channel

30, 106‧‧‧ flip channel

31, 105‧‧‧Feed Roller

32, 42‧‧‧ first power module

33‧‧‧Second power module

103‧‧‧ Paper take-up module

107‧‧‧Output roller set

261‧‧‧Switch gear set

262‧‧‧Switching shaft

263‧‧‧Toggle switch

264‧‧‧Torque Limiting Element

271‧‧‧Tip arm

272‧‧‧First drive shaft

273‧‧‧First paper roller

274‧‧‧Second drive shaft

275‧‧‧First paper take-up gear set

276‧‧‧First pickup roller

281‧‧‧ Third drive shaft

282‧‧‧Second separation roller

283‧‧‧4th drive shaft

284‧‧‧Second paper take-up gear set

285‧‧‧ Fifth pickup roller

311‧‧‧Feed roller shaft

321‧‧‧First drive component

322‧‧‧First drive gear set

323‧‧‧First transmission gear set

324‧‧‧Second transmission gear set

325, 425‧‧‧ planetary gear module

331‧‧‧Second drive element

332‧‧‧Second drive gear set

333‧‧‧ fifth drive shaft

334‧‧‧Drive Module

2611‧‧‧First switching gear

2612‧‧‧Second switching gear

2711‧‧‧Conversion gear set

2741‧‧‧Second connecting gear

2751‧‧‧First paper take-up gear

2761‧‧‧First connecting gear

2831‧‧‧fourth connecting gear

2841‧‧‧Second paper take-up gear

2851‧‧‧3rd connecting gear

3221‧‧‧First drive gear

3222‧‧‧Second drive gear

3223‧‧‧ Third drive gear

3231‧‧‧First transmission gear

3232‧‧‧Second transmission gear

3233‧‧‧ Third transmission gear

3234‧‧‧4th transmission gear

3235‧‧‧5th transmission gear

3236‧‧‧First linkage gear

3237, 4237‧‧‧ second linkage gear

3241‧‧‧6th transmission gear

3242‧‧‧ seventh transmission gear

3243‧‧‧8th transmission gear

3244‧‧‧ninth transmission gear

3245‧‧‧10th transmission gear

3246‧‧‧ Third linkage gear

3247, 4247‧‧‧4th linkage gear

3251, 4251‧‧‧ swinging board

3252, 4252‧‧‧ sun gear

3253, 4253‧‧‧ first planetary gear

3254, 4254‧‧‧ second planetary gear

3255, 4255‧‧‧Fixed components

3321‧‧‧fourth drive gear

3322‧‧‧ fifth drive gear

3323‧‧‧ sixth drive gear

3341‧‧‧6th drive shaft

3342‧‧‧Transport belt

3222A‧‧‧First gear

3222B‧‧‧second gear

3251A‧‧‧Rotary axis

3251B‧‧‧Bumps

3255A‧‧‧ Groove

3322A‧‧‧The other first gear

3322B‧‧‧Another second gear

S, S*‧‧‧ documents

C1‧‧‧First direction of rotation

C2‧‧‧second direction of rotation

S1*‧‧‧ top file

Sn*‧‧‧Bottom file

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevational view showing the cross-sectional structure of a conventional double-sided sheet-fed scanning device.

Figure 2 is a side elevational view showing the cross-sectional structure of the automatic feeder operation of the conventional double-sided sheet-fed scanning device.

3 is a side elevational view showing the structure of the double-sided sheet-fed scanning device of the present invention which has not been operated in a preferred embodiment.

4 is a partial structural view of a double-sided sheet-fed scanning device of the present invention in a preferred embodiment.

5 is a schematic structural view of the first paper take-up module, the second paper take-up module, the switching assembly, and the first power module of the double-sided paper-feeding scanning device of the present invention in a single-sided scanning state in a preferred embodiment; .

6 is a schematic structural view of a first power module and a partial second power module of the double-sided sheet-fed scanning device of the present invention in another preferred embodiment.

FIG. 7 is a partial schematic structural view of the first power module of the double-sided sheet-fed scanning device of the present invention in a single-sided scanning state in a preferred embodiment.

FIG. 8 is a partial structural view showing the first power module of the double-sided sheet-fed scanning device of the present invention in a single-sided scanning state in another preferred embodiment.

9 is a partial exploded view of a planetary gear module of a first power module of the double-sided sheet-fed scanning device of the present invention in a preferred embodiment.

FIG. 10 is a partial schematic structural view of a second power module of the double-sided sheet-fed scanning device of the present invention in a preferred embodiment.

Figure 11 is a side elevational view showing the structure of the double-sided sheet-fed scanning device of the present invention in a single-sided scanning state in a preferred embodiment.

FIG. 12 is a partial structural view showing the first power module of the double-sided sheet-fed scanning device of the present invention in a single-sided scanning state in a preferred embodiment.

Figure 13 is a side elevational view showing the structure of the double-sided sheet-fed scanning device of the present invention in a double-sided scanning state in a preferred embodiment.

Figure 14 is a partial structural view showing the first power module of the double-sided sheet-fed scanning device of the present invention in a double-sided scanning state in a preferred embodiment.

Figure 15 is a partial structural view showing the second transmission gear set of the first power module of the double-sided sheet-fed scanning device of the present invention in a double-sided scanning state in a preferred embodiment.

Figure 16 is a partial structural view showing the first power module of the double-sided sheet-fed scanning device of the present invention in another preferred embodiment.

26‧‧‧Switching components

27‧‧‧First paper take-up module

28‧‧‧Second paper take-up module

32‧‧‧First Power Module

33‧‧‧Second power module

261‧‧‧Switch gear set

262‧‧‧Switching shaft

263‧‧‧Toggle switch

264‧‧‧Torque Limiting Element

271‧‧‧Tip arm

272‧‧‧First drive shaft

273‧‧‧First paper roller

274‧‧‧Second drive shaft

275‧‧‧First paper take-up gear set

276‧‧‧First pickup roller

281‧‧‧ Third drive shaft

282‧‧‧Second separation roller

283‧‧‧4th drive shaft

284‧‧‧Second paper take-up gear set

285‧‧‧ Fifth pickup roller

321‧‧‧First drive component

322‧‧‧First drive gear set

323‧‧‧First transmission gear set

324‧‧‧Second transmission gear set

2611‧‧‧First switching gear

2612‧‧‧Second switching gear

2711‧‧‧Conversion gear set

2741‧‧‧Second connecting gear

2751‧‧‧First paper take-up gear

2761‧‧‧First connecting gear

2831‧‧‧fourth connecting gear

2841‧‧‧Second paper take-up gear

2851‧‧‧3rd connecting gear

C1‧‧‧First direction of rotation

C2‧‧‧second direction of rotation

Claims (20)

A double-sided sheet-fed scanning device for scanning a plurality of documents, the double-sided sheet-fed scanning device comprising: a scanning device for reading an image of the plurality of files; and an automatic paper feeder disposed on the scanning device Above, for feeding the plurality of files into the scanning device, the automatic paper feeder comprises: a paper tray for placing the plurality of documents; a first paper feeding path, close to the paper tray, for One of the plurality of files passes through the topmost file; a second paper feed path is disposed below the first paper feed path for passing the bottommost file of the plurality of files; a switching component is disposed at the first Between the paper feed passage and the second paper feed passage and oscillating relative to the first paper feed passage, the uppermost document is fed to the first paper feed passage or the lowermost document enters the second a paper feed path; a first paper take-up module located above the first paper feed path and swingable relative to the first paper feed path for feeding the uppermost document on the paper tray into the paper feed path First paper feed path a second paper take-up module is disposed under the second paper feed passage for feeding the lowermost document on the paper feed tray into the second paper feed passage; a plurality of paper feed rollers are disposed at the second paper feed roller The automatic paper feeder is configured to feed the plurality of files into the scanning device; a first power module is connected to the first paper take-up module, the second paper take-up module, and the The switching component is configured to provide a first power to the first paper picking module, the second paper picking module, and the switching component, so that the first paper picking module feeds the top file and the second paper picking The module feeds the lowermost file or the switching component is swung relative to the first paper feed channel; and a second power module is coupled to the first paper take-up module and the plurality of paper feed rollers for providing a And driving the first paper take-up module and the plurality of paper feed rollers to swing the first paper take-up module relative to the first paper feed path, and the plurality of paper feed rollers feed the plurality of paper feed rollers. The double-sided sheet-fed scanning device of claim 1, wherein the first pick-up module comprises: a first drive shaft coupled to the first power module for transmitting from the first a first power of a power module; a pick-up arm disposed on the first drive shaft and not rotating synchronously with the first drive shaft, and the pick-up arm is coupled to the second power module for Swinging relative to the first paper feed passage according to the second power from the second power module; a first paper feed roller disposed on the first drive shaft and rotating synchronously with the first drive shaft And feeding the uppermost document in the first paper feed passage into the automatic paper feeder, or providing a first friction force to the lowermost document; and a second transmission shaft connected to the first dynamic mold a set for transmitting the first power; a first pick-up gear set partially disposed on the first drive shaft without rotating synchronously with the first drive shaft, and the first pickup gear set is coupled to the second a drive shaft for transmitting the first power; and a first pickup roller, Provided on the paper take-up arm and connected to the first paper take-up gear set for feeding the uppermost document on the paper tray into the first paper feed passage, or corresponding to the first power module The second transmission shaft is fixed and fixed without rotating. The double-sided sheet-fed scanning device of claim 2, wherein the first pick-up roller has a first connecting gear adjacent to the first pick-up roller and connected to the first pick-up roller The second drive shaft includes a second connecting gear disposed on the second drive shaft and coupled to the first power module for being coupled to the second drive shaft. Synchronously rotating, when the second transmission shaft rotates in a first rotation direction according to the first power, the second connecting gear drives the first pickup gear set to rotate, and the first pickup gear set drives the first Rotating a connecting gear to rotate the first pickup roller in a second rotation direction opposite to the first rotation direction to feed the uppermost document into the first paper feed passage, and the first transmission shaft goes to the first Rotating in the rotation direction, the first paper separation roller is rotated in the second rotation direction to feed only the uppermost document into the automatic paper feeder; and when the first transmission shaft is in response to the first power to the first The first point when the rotation direction is rotated Rotating the paper roller in the first rotation direction to provide the first frictional force to the lowermost document, the second transmission shaft being fixed by the first power module without rotating, so that the first pickup roller set is fixed Do not turn. The double-sided sheet-fed scanning device of claim 1, wherein the switching assembly comprises: a switching gear set connected to the first power module for transmitting the first power; a switching shaft, Connected to the switching gear set for rotating in response to the first power; and a switching switch disposed on the switching shaft and swingable according to the rotation of the switching shaft to open the first paper feed passage or the first Two paper feed channels. The double-sided sheet-fed scanning device of claim 4, wherein the switching assembly further comprises a torque limiting member disposed in at least one of the switching gears for the switching switch When the first paper take-up module or the second paper feed channel is in contact, the switching shaft is controlled not to rotate synchronously with the at least one switching gear. The double-sided sheet-fed scanning device of claim 4, wherein the switching shaft is rotated by the switching shaft to the first when the switching shaft is rotated in a first rotation direction due to the first power Rotating direction to open the second paper feed passage to close the first paper feed passage, and when the switching shaft rotates in a second rotation direction opposite to the first rotation direction due to the first power, The changeover switch is driven by the switching shaft to swing in the second rotation direction to open the first paper feed path and close the second paper feed path. The double-sided sheet-fed scanning device of claim 1, wherein the second pick-up module comprises: a third drive shaft coupled to the first power module for transmitting from the first a first power of the power module; a second paper feed roller disposed on the third drive shaft and rotating in synchronization with the third drive shaft for feeding only one of the second paper feed channels The lowermost file enters the automatic paper feeder or provides a second friction force to the uppermost file; a fourth drive shaft is coupled to the first power module for transmitting the first power; a paper gear set partially disposed on the third drive shaft without rotating synchronously with the third drive shaft, and the second pick-up gear set is coupled to the fourth drive shaft for transmitting the first power; a second paper take-up roller coupled to the second paper take-up gear set for feeding the lowermost document on the paper tray into the second paper feed passage, or the first one to be fixed by the first power module The four drive shafts are fixed and do not rotate. The double-sided sheet-fed scanning device of claim 7, wherein the second pick-up roller has a third connecting gear adjacent to the second pick-up roller and connected to the second pick-up roller For driving the second pickup roller, the fourth transmission shaft includes a fourth connecting gear, The first transmission shaft is coupled to the first power module for synchronous rotation with the fourth transmission shaft. When the fourth transmission shaft rotates in a second rotation direction according to the first power. The fourth connecting gear drives the second pick-up gear set to rotate, and the second pick-up gear set drives the third connecting gear to rotate, so that the second pick-up roller is opposite to the second rotating direction. Rotating in the rotation direction to feed the lowermost document into the second paper feed passage, the third transmission shaft rotating in the first rotation direction due to the first power, and rotating the second paper separation roller in the first rotation direction And feeding only the lowermost document into the automatic paper feeder; and rotating the second paper separation roller in the second rotation direction when the third transmission shaft is rotated by the first power to the second rotation direction And providing the second friction force to the uppermost file, and the fourth transmission shaft is fixed and not rotated by the first power module, so that the second pickup roller group is fixed without rotating. The double-sided sheet-fed scanning device of claim 1, wherein the first power module comprises: a first driving component for rotating to provide the first power; a first driving gear set, Connected to the first driving component for transmitting the first power; a first driving gear set connected to the first paper picking module for transmitting the first power to the first paper picking module; a second transmission gear set disposed below the first transmission gear set and coupled to the second paper take-up module for transmitting the first power to the second paper take-up module; and a planetary gear module, Connecting to the first driving gear set and between the first transmission gear set and the second transmission gear set for swinging and connecting to the first transmission gear set or the second transmission gear according to the first power group. The double-sided sheet-fed scanning device of claim 9, wherein the first driving gear set comprises: a first driving gear is sleeved on the first driving component for synchronously rotating with the first driving component to transmit the first power; and a second driving gear is engaged with the first driving gear for being The first driving gear is driven to rotate, and the second driving gear comprises: a first segment gear meshing with the first driving gear; and a second segment gear formed by the first segment gear extending, and The first segment gear rotates synchronously; and a third drive gear meshes with the second segment gear for being rotated by the second segment gear. The double-sided sheet-fed scanning device of claim 9, wherein the first transmission gear set comprises: a first transmission gear disposed on a first transmission shaft of the first paper take-up module The first transmission shaft is driven to rotate according to the first power; the second transmission gear is sleeved on the second transmission shaft of the first paper take-up module and does not rotate synchronously with the second transmission shaft. And the second transmission gear meshes with the first transmission gear to drive the first transmission gear to rotate according to the first power; a third transmission gear is sleeved on the second transmission shaft and the first transmission gear The second transmission shaft rotates synchronously and is adjacent to the second transmission gear, and is driven by the planetary gear module to rotate when the planetary gear module is engaged with the planetary gear module, and drives the second transmission shaft to rotate; a fourth transmission gear, Engaging with the second transmission gear; a fifth transmission gear meshing with the fourth transmission gear for being driven by the fourth transmission gear or being driven by the planetary gear module when meshing with the planetary gear module; First interlocking gear adjacent to the fourth a transmission gear and meshing with the third transmission gear; And a second interlocking gear adjacent to the fifth transmission gear and meshing with the first interlocking gear for being connected to the planetary gear module to be fixed. The double-sided sheet-fed scanning device of claim 11, wherein the second interlocking gear and the planet are engaged when the fifth transmission gear meshes with the planetary gear module and is driven by the planetary gear module The gear module is connected and fixed by the planetary gear module without rotating or swinging, so that the first interlocking gear, the third transmission gear, the second transmission shaft and the first paper take-up module are first The pickup roller is fixed without rotating. The double-sided sheet-fed scanning device of claim 9, wherein the second transmission gear set comprises: a sixth transmission gear disposed on a third transmission shaft of the second paper take-up module The third transmission shaft is driven to rotate according to the first power; a seventh transmission gear is sleeved on the fourth transmission shaft of the second paper take-up module and does not rotate synchronously with the fourth transmission shaft. And engaging with the sixth transmission gear to drive the sixth transmission gear to rotate according to the first power; an eighth transmission gear is sleeved on the fourth transmission shaft to rotate synchronously with the fourth transmission shaft And adjacent to the seventh transmission gear, when being engaged with the planetary gear module, being driven by the planetary gear module to rotate, and driving the fourth transmission shaft to rotate; a ninth transmission gear, and the seventh transmission Gear engagement; a tenth transmission gear meshing with the ninth transmission gear for being driven by the ninth transmission gear or being driven by the planetary gear module when meshing with the planetary gear module; a third linkage gear, Adjacent to the ninth transmission gear and The eighth transmission gear meshes; A fourth interlocking gear is adjacent to the tenth transmission gear and meshes with the third interlocking gear for being coupled to the planetary gear module to be fixed. The double-sided sheet-fed scanning device of claim 13, wherein the fourth interlocking gear and the planet are engaged when the tenth transmission gear meshes with the planetary gear module and is driven by the planetary gear module The gear module is connected and fixed by the planetary gear module without rotating or swinging, so that the third interlocking gear, the eighth transmission gear, the fourth transmission shaft and the second paper take-up module are second The pickup roller is fixed without rotating. The double-sided sheet-fed scanning device of claim 9, wherein the planetary gear module comprises: a swinging plate located between the first transmission gear set and the second transmission gear set; The first driving gear set should be swung by the rotation of the first driving gear set; a sun gear is disposed on the oscillating plate and meshes with the first driving gear set for being rotated by the first driving gear set, and driving the oscillating plate to swing a first planetary gear disposed on the oscillating plate and located on a first side of the sun gear to mesh with the sun gear for responsive to the swing of the oscillating plate and the second of the first transmission gear set The transmission gear and a third transmission gear mesh or mesh with a seventh transmission gear and an eighth transmission gear of the second transmission gear set, and are driven by the sun gear to transmit the first power to the first transmission gear a second transmission gear set; a second planetary gear disposed on the oscillating plate and located on a second side of the sun gear to mesh with the sun gear for oscillating with the oscillating plate One fifth transmission gear of the first transmission gear set meshes or meshes with one of the tenth transmission gears of the second transmission gear set, and is driven by the sun gear to transmit the first power to the first transmission gear set or a second transmission gear set; a fixing member disposed on the oscillating plate and adjacent to the second planetary gear for connecting to a second interlocking gear of the first transmission gear set or the second transmission according to the swing of the oscillating plate One of the gear sets is connected to the fourth interlocking gear, and the second interlocking gear or the fourth interlocking gear is fixed without rotating or swinging. The double-sided sheet-fed scanning device of claim 15, wherein the fixing member is a notched gear. The double-sided sheet-fed scanning device according to claim 15, wherein the fixing member is extended by a rotating shaft of the swinging plate to form a protruding column. The double-sided sheet-fed scanning device of claim 1, wherein the second power module comprises: a second driving component for rotating to provide the second power; and a second driving gear set, Connected to the second driving component for transmitting the second power; a fifth transmission shaft coupled to the second driving gear set for being rotated by the second driving gear set and transmitting the second power And a transmission module connected to the fifth transmission shaft, the first paper take-up module and the plurality of paper feed rollers for transmitting the second power to the first paper take-up module to make the first take-up The paper module swings relative to the first paper feed path, and transmits the second power to the plurality of paper feed rollers, so that the plurality of paper feed rollers feed the plurality of documents. The double-sided sheet-fed scanning device of claim 18, wherein the transmission module comprises: a sixth transmission shaft coupled to the first paper take-up module for rotating to drive the first take-up The paper module is swung relative to the first paper feed path; and a transport belt is coupled to the fifth drive shaft, the sixth drive shaft, and the plurality of paper feed rollers And a plurality of paper feed roller shafts for transmitting the second power to the sixth drive shaft and the plurality of paper feed roller shafts, so that the fifth drive shaft, the sixth drive shaft and the plurality of paper feed roller shafts rotate synchronously. The double-sided sheet-fed scanning device of claim 19, wherein the transmission module comprises: a sixth drive shaft coupled to the first paper take-up module for rotating to drive the first take-up a paper module swinging relative to the first paper feed path; and a transmission gear set coupled to the fifth drive shaft, the sixth drive shaft, and the plurality of paper feed roller shafts of the plurality of paper feed rollers for transmitting the first The second power shaft and the plurality of paper feed roller shafts are rotated to synchronously rotate the fifth drive shaft, the sixth drive shaft and the plurality of paper feed roller shafts.