TWM500681U - Feeding type scanner with shock elimination mechanism - Google Patents

Description

Feed scanning device with tremor elimination mechanism

The present invention relates to a feed type scanning device, and more particularly to a feed type scanning device having a chatter cancellation mechanism.

In a conventional automatic document feeder, a scroll wheel is typically used to feed a document through a scanning window for scanning a document image by a scanning module located below the scanning window. The scanning quality of the document image is related to the depth of field of the scanning module. The greater the depth of field allows the files in the feed to not have to be completely flat on the scan window, the smaller the depth of field the more the files in the feed are not allowed to move away from the scan window.

In order to effectively control the file to fall within the depth of field of the scanning module when the document passes through the scanning window, a conventional scanner uses a scroll wheel to contact the scanning window. When the file has not passed through the scanning window, the wheel and the scanning window are slidably rubbed. When the document passes through the scanning window, the wheel and the document are rolled and rubbed, and the document is slidingly rubbed with the scanning window. In this case, the amount of wear of the roller and the amount of wear of the scanning window are both quite large, which easily affects the scanning quality. Moreover, when the thickness of the document becomes thicker, the file may not easily enter the middle of the scroll wheel and the scanning window, and the feeding process cannot be completed. Therefore, the conventional technique generally uses the elastic force to push the document to the scanning window for controlling the document in the feed within the depth of field of the scanning module. Whether using a flatbed or a scroll wheel to press a document, since the contact area between the flatbed and the document is too large, it is impossible to surely attach the document passing through the scanning area to the scanning window. Especially in the case of contact image sensing modules, the scanning quality is more susceptible, and the traditional flat or roller Unable to meet the needs of users.

Or, some scanning windows are hollowed out without glass. At this time, the element that rubs against the roller becomes the scanning module. Therefore, the conventional method accelerates the wear of the scroll wheel and the scanning window or the scanning module, thereby affecting the subsequent image scanning quality.

Furthermore, in the conventional paper-feeding scanner, the original is likely to collide with the transparent platform and the feed-out channel to generate chattering to affect the scanning quality, and when the end of the document is separated from the separation roller and the feeding roller, tremor is generated ( Shock), because the scanning continues, it will further affect the image scanning quality.

Accordingly, it is an object of the present invention to provide a feed type scanning device having a chatter cancellation mechanism that effectively solves the problems caused by chattering.

To achieve the above object, the present invention provides a feed type scanning device comprising a channel, a feeding mechanism, a pressing roller, a spring piece and a scanning module. The feeding mechanism feeds an original through the passage. The pressing roller and the elastic piece are respectively disposed on both sides of the passage, and the pressing roller presses the original to the elastic piece. The scanning module is disposed downstream of the pressing roller and the elastic piece, and performs image scanning on the original.

Therefore, the feed type scanning device provided by the embodiment of the present invention is provided with a piece of elastic piece in the passage, and the original is pressed with the pressing roller so that the original is not affected by the shock during scanning, and the depth of field when scanning the image is maintained constant. The value is such that the quality of the scanned image is maintained.

In order to make the above description of the present invention more comprehensible, the preferred embodiments are described below, and are described in detail below with reference to the accompanying drawings.

O‧‧‧ original

S‧‧‧Printing paper

1‧‧‧Feed Scanner

2‧‧‧Manuscript匣

10‧‧‧ channel

10A‧‧‧ channel board

11‧‧‧Feeding channel

11A‧‧‧first channel board

11B‧‧‧Second channel board

11C‧‧‧ end face

11D‧‧‧Back

11E‧‧‧ concave arc

11F‧‧‧ Groove

12‧‧‧ scan channel

12'‧‧‧Travel path

13‧‧‧Feedback

16‧‧‧ Connection

20‧‧‧Feeding agency

21‧‧‧First wheel

22‧‧‧Second wheel

23‧‧‧ Third wheel

24‧‧‧fourth wheel

25‧‧‧ first combination

26‧‧‧ second combination

27‧‧‧Separate scroll wheel

28‧‧‧Friction pad

30‧‧‧Squeeze roller

31‧‧‧Shell

32‧‧‧ Spring

33‧‧‧Cantilever

40‧‧‧Shrap

41‧‧‧ first end

42‧‧‧second end

45‧‧‧挚挚

47‧‧‧ convex arc

50‧‧‧ scan module

51, 52‧‧‧ Optical reading module

60‧‧‧Transparent platform

70‧‧‧Power source

1 shows a perspective view of a feed type scanning device in accordance with a first embodiment of the present invention.

Fig. 2 is a view showing the configuration of a feed type scanning device according to a first embodiment of the present invention.

Figure 3 shows a partial schematic view of a feed scanning device in accordance with a first embodiment of the present invention.

Figure 4 shows a partial enlarged view of the feed scanning device of Figure 3.

Figure 5 shows a partial enlarged view of a feed type scanning device in accordance with a second embodiment of the present invention.

Figure 6 shows a partial enlarged view of a feed type scanning device in accordance with a third embodiment of the present invention.

Figure 7 shows a partial schematic view of a feed scanning device in accordance with a fourth embodiment of the present invention.

Since the end of the document of the prior art causes tremor to affect the scanning quality when it is separated from the feeding roller, the embodiment of the present invention provides a tremor removing mechanism to eliminate chattering to solve the above problem.

Fig. 1 shows a perspective view of a feed type scanning device 1 according to a first embodiment of the present invention. 2 and 3 respectively show a schematic configuration and a partial schematic view of the feed type scanning device 1 according to the first embodiment of the present invention. As shown in FIGS. 1 to 3, the feed type scanning device 1 of the present embodiment includes a channel 10, a feeding mechanism 20, a pressing roller 30, a spring piece 40, and a scanning module 50.

In the present embodiment, the feed type scanning device 1 is implemented as a multifunction printer having functions such as scanning, copying, etc., and the printing paper S is output after copying, but the present invention is not particularly limited thereto. The MFP also has an operation interface, including but not limited to buttons, screens, etc., allowing the user to set the desired output through the operation interface.

The feeding mechanism 20 feeds an original O through the passage 10. A plurality of originals O can be placed on the original magazine 2 of the feed type scanning device 1 and fed one by one by the feeding mechanism 20. The channel 10 is used for subsequent image scanning operations. The feeding mechanism 20 includes a first roller 21, a second roller 22, a third roller 23 and a fourth roller 24. Of course, the feeding mechanism 20 can further include a separating roller 27 and a friction pad 28. The separating roller 27 and the friction pad 28 perform a separate action to prevent a plurality of originals O from entering the channel 10 at the same time. The first roller 21 and the second roller 22 are disposed upstream of the pressing roller 30. The third roller 23 and the fourth roller 24 are disposed downstream of the pressing roller 30. The so-called upstream and downstream are based on the feeding direction of the original O, the position where the original O first arrives is referred to as the upstream, and the position where the original O is followed is the downstream. A first combination 25 of the first roller 21 and the second roller 22 and a second combination 26 of the third roller 23 and the fourth roller 24 are such that the original O sandwiched between the first combination 25 and the second combination 26 is disengaged from the passage One of the transparent platforms 60 of 10 does not generate a chattering phenomenon in the channel 10 that affects the scanning quality, so that the scanning module 50 performs high-quality image scanning on the original O through the transparent platform 60.

The channel 10 includes a feed channel 11, a scan channel 12, and a feed channel 13. The original O is fed into the feed passage 11 from the outside of the passage 10. The scanning channel 12 is connected to the feeding channel 11. The pressing roller 30 and the elastic piece 40 are respectively disposed at a joint 16 of the scanning channel 12 and the feeding channel 11. The scanning module 50 is disposed on the scanning channel 12 to perform image scanning on the original O. The feed-out channel 13 is connected to the scan channel 12, and the original O is fed out from the feed-out channel 13 to the outside for storage.

The pressing roller 30 and the elastic piece 40 are respectively disposed on both sides of the passage 10, and the pressing roller 30 presses the original O toward the elastic piece 40. In the present embodiment, the pressing roller 30 is driven to rotate by the power source 70 of the feed type scanning device 1 in synchronization with the feeding mechanism 20. That is, the power source 70 drives the first roller 21, the third roller 23, and the pressing roller 30 to rotate. In another embodiment, the pressing roller 30 is rotated by the original O without being connected to any power source. In still another embodiment, the pressing roller 30 is caused by the cooling fan of the feed scanning device 1. The airflow (suction or blown airflow) drives the rotation, so that the heat dissipation fan can achieve heat dissipation and drive the pressing roller 30, and only the blade wheel and the pressing roller 30 need to be coaxially mounted.

In one example, the pressing roller 30 is spring-loaded in the feed scanning device 1. The pressing roller 30 may be disposed on the cantilever 33, the cantilever 33 is coupled to the spring 32, and the spring is coupled to the housing 31 of the feed scanning device 1 to achieve a springing function, as shown in FIG. In another example, the pressing roller 30 is fixedly disposed on the housing of the feed type scanning device 1, and the elasticity of the elastic piece 40 is used to press the original O and the pressing roller 30, and the function of eliminating chattering can still be provided. In the present embodiment, the pressing roller 30 and the elastic piece 40 are referred to as a tremor eliminating mechanism. The outer surface of the pressing roller 30 may have an elastic layer, such as a rubber material or elastic bristles, which may further assist in absorbing the chattering generated when the original leaves the roller.

The scanning module 50 is disposed downstream of the pressing roller 30 and the elastic piece 40, and performs image scanning on the original O passing through the scanning path 12 of the channel 10. The scanning module 50 can perform reflective scanning and transmissive scanning on the original O. Reflective scanning refers to obtaining the light reflected from the original to obtain an image signal, and transmissive scanning refers to obtaining light that penetrates the original to obtain an image signal. In the embodiment, the scanning module 50 includes two optical reading modules 51 and 52 respectively disposed on both sides of the channel 10 and performing double-sided image scanning on the original O. The optical reading module may be a contact image sensor (CIS) or a charge-coupled device (CCD) type image sensor.

Figure 4 shows a partial enlarged view of the feed scanning device of Figure 3. As shown in FIG. 3 and FIG. 4, the feeding passage 11 is formed by a pair of first passage plate 11A and a second passage plate 11B, and the elastic piece 40 is fixed to one end surface 11C of the first passage plate 11A. By designing the shape and angle of the end face 11C, the elastic piece 40 can be provided with different elastic forces. In this embodiment, The shrapnel 40 has a convex arc 47 that projects toward the passage 10. Further, one of the first ends 41 of the elastic piece 40 is fixed to one of the passage plates 10A (in the present embodiment, the first passage plate 11A) of the passage 10. The second end 42 of one of the elastic pieces 40 is suspended from the transparent platform 60 of the channel 10 without being in direct contact, and the pressing portion 45 of the elastic piece 40 and the pressing roller 30 is located between the first end 41 and the second end 42 of the elastic piece 40. .

Figure 5 shows a partial enlarged view of a feed type scanning device in accordance with a second embodiment of the present invention. As shown in FIG. 5, the present embodiment is similar to the first embodiment except that the end face 11C of the first passage plate 11A has a concave arc 11E for the elastic piece between the feed passage 11 and the scanning passage 12. 40 has a convex arc 47 that projects toward the channel 10. In addition, the first end 41 of the elastic piece 40 is fixed on the channel plate 10A of the channel 10. The second end 42 of the elastic piece 40 is in direct contact with the transparent platform 60 of the channel 10, and the compression piece 45 of the elastic piece 40 and the pressing roller 30 is located at the elastic piece. Between the first end 41 and the second end 42 of 40, support for smoothly moving the original O can be provided.

Figure 6 shows a partial enlarged view of a feed type scanning device in accordance with a third embodiment of the present invention. As shown in FIG. 6, the present embodiment is similar to the first embodiment except that the first end 41 of the elastic piece 40 is fixed in a groove 11F of one of the back faces 11D of one of the passage plates 10A of the passage 10, which is convenient. Assembly and firming effect. Of course, by designing the shape of the end face 11C, it is also possible to provide different tremor elimination effects.

Figure 7 shows a partial schematic view of a feed scanning device in accordance with a fourth embodiment of the present invention. As shown in FIG. 7, the present embodiment is similar to the first embodiment except that the elastic piece 40 is fixed to one of the first passage plates 11A away from the back surface 11D of the passage 10.

Referring to FIG. 2, the moving path of the original of the feed type scanning device 1 of the present invention is as shown by the solid line depicting the scanning channel 12, and the original can smoothly scan the channel 12 without colliding with the feeding channel 13; Known technology of the paper-fed scanner does not provide tremor In addition to the mechanism, the moving path 12' of the original is as shown by the imaginary line, because the original easily collides with the transparent platform 60 and the feeding-out passage 13 to cause chattering to affect the scanning quality.

Therefore, the feed type scanning device provided by the embodiment of the present invention is provided with a piece of elastic piece in the passage, and the original is pressed with the pressing roller so that the original is not affected by the tremor during scanning, and the depth of field when scanning the image is maintained at a certain value, so that The image quality obtained by the scanning is maintained.

The specific embodiments set forth in the detailed description of the preferred embodiments are merely used to facilitate the description of the technical scope of the present invention, and are not intended to limit the present invention narrowly to the above embodiments, without departing from the spirit of the present invention and the following claims. The scope of the scope and the implementation of various changes are within the scope of this new model.

O‧‧‧ original

1‧‧‧Feed Scanner

10‧‧‧ channel

11‧‧‧Feeding channel

12‧‧‧ scan channel

12'‧‧‧Travel path

13‧‧‧Feedback

16‧‧‧ Connection

20‧‧‧Feeding agency

21‧‧‧First wheel

22‧‧‧Second wheel

23‧‧‧ Third wheel

24‧‧‧fourth wheel

25‧‧‧ first combination

26‧‧‧ second combination

27‧‧‧Separate scroll wheel

28‧‧‧Friction pad

30‧‧‧Squeeze roller

40‧‧‧Shrap

50‧‧‧ scan module

51, 52‧‧‧ Optical reading module

60‧‧‧Transparent platform

70‧‧‧Power source

Claims (12)

A feed type scanning device comprising: a passage; a feeding mechanism for feeding an original through the passage; a pressing roller and a resilient piece respectively disposed on both sides of the passage, the pressing roller pressing the original to the elastic piece; A scanning module is disposed downstream of the pressing roller and the elastic piece, and performs image scanning on the original. The feed type scanning device of claim 1, wherein the channel comprises: a feeding channel, the original is fed into the feeding channel from the outside; a scanning channel connecting the feeding channel, the pressing roller And the elastic piece is disposed at a connection between the scanning channel and the feeding channel, the scanning module is disposed on the scanning channel; and a feeding channel is connected to the scanning channel, and the original is fed out from the feeding channel To the outside. The feed type scanning device of claim 2, wherein the feed channel is formed by one of the first channel plate and the second channel plate, and the spring piece is fixed to one end surface of the first channel plate. . The feed type scanning device of claim 3, wherein the elastic piece has a convex arc that protrudes toward the passage. The feed type scanning device of claim 3, wherein the end surface of the first channel plate has a concave arc such that the elastic piece between the feeding channel and the scanning channel has a convex shape The convex arc of the channel. The feed type scanning device of claim 2, wherein the feed channel is formed by one of a first channel plate and a second channel plate, the spring piece being fixed to one of the first channel plates The back of one of the channels. The feed scanning device of claim 1, wherein the first end of the elastic piece is fixed to one of the channel plates of the channel, and the second end of the elastic piece is not in direct contact with one of the transparent platforms of the channel. The spring piece and the pressing portion of the pressing roller are located between the first end and the second end of the elastic piece. The feed scanning device of claim 1, wherein the first end of the elastic piece is fixed to one of the channel plates of the channel, and the second end of the elastic piece is in direct contact with a transparent platform of the channel. The spring piece and the pressing portion of the pressing roller are located between the first end and the second end of the elastic piece. The feed type scanning device of claim 1, wherein the pressing roller is driven to rotate in synchronization with the feeding mechanism. The feed scanning device of claim 1, wherein the scanning module comprises two optical reading modules respectively disposed on two sides of the channel, and performing double-sided image scanning on the original. The feed type scanning device of claim 1, wherein the feeding mechanism comprises: a first roller and a second roller disposed upstream of the pressing roller; and a third roller and a fourth roller, Provided downstream of the pressing roller, wherein a first combination of the first roller and the second roller and a second combination of the third roller and the fourth roller are clamped to the first Combining the original in the second combination with one of the transparent platforms in the channel, the scanning module performs image scanning on the original through the transparent platform. The feed type scanning device of claim 1, wherein the first end of the elastic piece is fixed in a recess in one of the back surfaces of one of the passage plates of the passage.