Paper pushing mechanism and scanning device using same

Abstract

The utility model discloses a scanning device. The scanning device comprises a frame; the paper feeding channel comprises at least one paper inlet and a paper outlet; the first paper outlet wheel is arranged at the position, close to the paper outlet, of the paper feeding channel; the swing arm is arranged at the position, close to the paper outlet, of the paper feeding channel and comprises a connecting end pivoted with the frame and a swing end extending towards the paper outlet; the two ends of the spring are connected to the frame and the swing arm respectively; the first paper pushing wheel is pivoted to the swinging end of the swinging arm; and the transmission mechanism is connected between the first paper outlet wheel and the first paper pushing wheel.

Description

Technical Field

[0001] The present invention relates to a paper pushing mechanism, and more particularly to a paper pushing mechanism disposed at the paper outlet of a scanning device to avoid paper feeding errors. Background Technology

[0002] Please see Figure 5 Automatic paper feed devices are often installed in scanning devices, enabling the scanning device to automatically scan large amounts of documents or image media. A common paper feed structure 10' includes a paper feed channel 20', an image reading unit 30' disposed in the paper feed channel 20', a complex set of paper feed rollers 11' disposed on the paper feed channel 20', an output roller set 12' disposed at the end of the paper feed channel 20' to discharge scanned documents and image media, and an output tray 13' disposed at the end of the paper feed channel 20' to temporarily store the discharged documents and image media. In order to facilitate scanning documents and image media of various thicknesses, the paper feed channel 20' includes a straight horizontal paper feed channel 22' with an independent paper inlet 21'. Users can feed thicker documents and image media into the scanning device through the independent paper inlet 21' for scanning, and discharge them from the paper outlet without bending.

[0003] Please see again Figures 6 to 8 In some scanning devices prioritizing portability, the output tray 13' is pivotally connected to the scanning device, and the angle between the output tray 13' and the paper feed channel 20' is quite large. Therefore, the ejected paper tends to curl inwards after colliding with the output tray 13'. The large tilt angle of the output tray 13' also tends to reduce the moving speed of the ejected paper, causing later-fed paper to overtake earlier-fed paper and be inserted into the paper stack in the wrong order. When the ejected paper speed is too low, the tail of the paper may even get caught on the output roller, affecting the ejection of subsequent paper. Therefore, it is necessary to provide a paper pushing mechanism located at the output port of the scanning device to prevent incorrect paper output. Utility Model Content

[0004] The purpose of this invention is to provide a paper pushing mechanism installed at the paper output port of a scanning device to avoid paper output errors.

[0005] To achieve the above objectives, the present invention discloses a paper pushing mechanism applied to a scanning device. The scanning device has a paper output port and a first paper output wheel disposed near the paper output port. The paper pushing mechanism includes: a swing arm disposed near the paper output port and including a connecting end pivotally connected to the scanning device and a swing end extending toward the paper output port; a spring with its two ends respectively connected to the scanning device and the swing arm; a first paper pushing wheel pivotally connected to the swing end of the swing arm; and a transmission mechanism connected between the first paper output wheel and the first paper pushing wheel, causing the first paper pushing wheel and the first paper output wheel to rotate in the same direction.

[0006] Furthermore, the scanning device includes a frame; a drive motor disposed within the frame; a paper feed channel housed within the frame and including at least one paper inlet and one paper outlet; a first paper output roller disposed on the paper feed channel near the paper outlet, and the first paper output roller is disposed on the lower side of the paper feed channel and connected to the drive motor; a second paper output roller disposed on the paper feed channel near the paper outlet, and the second paper output roller is disposed on the upper side of the paper feed channel and abuts against the first paper output roller; and wherein the connecting end of the swing arm is coaxially arranged with the first paper output roller.

[0007] Furthermore, the spring is configured as a torsion spring and includes a body portion mounted on the shaft of the first paper output roller, a fixing side extending from one end of the body portion and fixed to the frame, and a force-applying side extending from the other end of the body portion and fixed to the swing arm.

[0008] Furthermore, the paper feed channel includes a horizontal paper feed channel running through the front and rear ends of the frame and a continuous paper feed channel extending from the top of the frame to the horizontal paper feed channel.

[0009] Furthermore, the transmission mechanism includes a transmission gear mounted on the shaft of the first paper output wheel, a driven gear mounted on the shaft of the first paper pusher wheel, and a relay gear mounted on the swing arm and connected between the transmission gear and the driven gear.

[0010] A scanning device includes: a frame; a drive motor disposed within the frame; a paper feed channel housed within the frame and including at least one paper inlet and one paper outlet; at least one paper feed roller mounted on the paper feed channel and connected to the drive motor; a scanning optical engine disposed on the paper feed channel to read an image medium; a first paper output roller disposed on the paper feed channel near the paper outlet, and disposed below the paper feed channel and connected to the drive motor; a second paper output roller disposed on the paper feed channel near the paper outlet, and disposed above the paper feed channel and abutting against the first paper output roller; and a swing arm. The device comprises: a swing arm positioned on the paper feed channel near the paper outlet, with the swing arm located below the paper feed channel and including a connecting end pivotally connected to the frame and a swing end extending toward the paper outlet; a spring, with its two ends connected to the frame and the swing arm respectively, to push the swing end toward the upper side of the paper feed channel; a first pusher wheel pivotally connected to the swing end of the swing arm; a second pusher wheel positioned on the paper feed channel near the paper outlet, and positioned above the paper feed channel, abutting against the first pusher wheel when the swing arm swings upward; and a transmission mechanism connected between the first paper outlet wheel and the first pusher wheel, causing the first pusher wheel and the first paper outlet wheel to rotate in the same direction.

[0011] In summary, this invention provides a paper-pushing mechanism applied to a scanning device. The scanning device has a paper output port and a first paper output roller disposed near the paper output port. The paper-pushing mechanism includes: a swing arm disposed near the paper output port, comprising a connecting end pivotally connected to the scanning device and a swinging end extending towards the paper output port; a spring, with its two ends respectively connected to the scanning device and the swing arm; a first paper-pushing roller pivotally connected to the swinging end of the swing arm; and a transmission mechanism connected between the first paper output roller and the first paper-pushing roller, causing the first paper-pushing roller and the first paper output roller to rotate in the same direction. This achieves the technical effect of avoiding paper output errors. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the scanning device used in this work;

[0013] Figure 2 This is a 3D diagram of the paper-pushing mechanism in this work;

[0014] Figure 3 This is a cross-sectional schematic diagram of the scanning device feeding thin paper in this work;

[0015] Figure 4 This is a cross-sectional schematic diagram of the scanning device feeding thick paper in this work;

[0016] Figure 5 This is a cross-sectional schematic diagram of a conventional scanning device;

[0017] Figure 6 This is a cross-sectional diagram showing the paper curling inward as it exits a conventional scanning device.

[0018] Figure 7 This is a cross-sectional diagram of paper ejected from a conventional scanning device being inserted into a stack of paper in the wrong order.

[0019] Figure 8 This is a cross-sectional diagram of the paper being ejected from a conventional scanning device, with the end of the paper hanging on the output roller. Detailed Implementation

[0020] To illustrate the technical content, structural features, objectives, and technical effects of the present invention in detail, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0021] Please see Figure 1 The scanning apparatus 100 disclosed herein includes a frame 10, the interior of which forms an accommodating space. A drive motor (not shown) is disposed within the accommodating space. A paper feed channel 20, in this preferred embodiment, is housed within the accommodating space to guide an image medium, and includes a horizontal paper feed channel 20a extending through the front and rear ends of the frame 10, a continuous paper feed channel 20b extending from the top of the frame 10 to the horizontal paper feed channel 20a, an inlet 21 disposed at the top of the continuous paper feed channel 20b and the front end of the horizontal paper feed channel 20a, and an outlet 22 disposed at the rear end of the horizontal paper feed channel 20a. A plurality of paper feed rollers 23 are mounted on the paper feed channel 20 and connected to the drive motor to feed the image medium. A scanning optical engine 30 is disposed on the paper feed channel 20 to read the image medium. And an output tray that has been set at the output port 22 and has already carried the ejected image media.

[0022] To avoid various paper output errors caused by the image medium colliding with the output tray when being ejected in conventional scanning devices, the scanning device 100 of this invention is further provided with a paper pushing mechanism 40 near the output tray 22. The paper pushing mechanism 40 is configured to eject the image medium from the output tray 22 at an upward angle, so that the direction of travel of the image medium is parallel to the output tray, thereby reducing the chance of the image medium colliding with the output tray and causing paper output errors.

[0023] Please see again Figure 1 and Figure 2 The paper pushing mechanism 40 includes: a first paper output roller 24 disposed on the paper feed channel 20 near the paper output port 22, the first paper output roller 24 being disposed on the lower side of the paper feed channel 20 and connected to the drive motor to eject the image medium from the paper output port 22; and a second paper output roller 25 disposed on the paper feed channel 20 near the paper output port 22, the second paper output roller 25 being disposed on the upper side of the paper feed channel 20 and abutting against the first paper output roller 24.

[0024] A swing arm 41 is disposed on the paper feed channel 20 near the paper outlet 22, and the swing arm 41 is located on the lower side of the paper feed channel 20. It includes a connecting end 42 pivotally connected to the frame 10 and a swing end 43 extending towards the paper outlet 22. The connecting end 42 of the swing arm 41 is coaxially arranged with the first paper output roller 24. A spring 44 is provided, with its two ends connected to the frame 10 and the swing arm 41 respectively, to push the swing end 43 towards the upper side of the paper feed channel 20. The spring 44 is a torsion spring and includes a body portion 44a fitted onto the rotating shaft of the first paper output roller 24, a fixing side 44b extending from one end of the body portion 44a and fixed to the frame 10, and a force-applying side 44c extending from the other end of the body portion 44a and fixed to the swing arm 41. A first paper-pushing roller 45 is pivotally connected to the swing end 43 of the swing arm 41. A second paper-pushing roller 46 is disposed on the paper feed channel 20 near the paper outlet 22, and the second paper-pushing roller 46 is disposed on the upper side of the paper feed channel 20 and abuts against the first paper-pushing roller 45 when the swing arm 41 swings upward. A transmission mechanism 50 is connected between the first paper outlet roller 24 and the first paper-pushing roller 45, and the transmission mechanism 50 is configured to cause the first paper-pushing roller 45 and the first paper outlet roller 24 to rotate in the same direction.

[0025] Please see Figure 2In this preferred embodiment, the transmission mechanism 50 includes a transmission gear 51 mounted on the shaft of the first paper output roller 24, a driven gear 52 mounted on the shaft of the first paper pusher roller 45, and a relay gear 53 mounted on the swing arm 41 and connected between the transmission gear 51 and the driven gear 52. See also... Figure 3 and Figure 4 Through the interconnected transmission gear 51, driven gear 52, and relay gear 53, the first paper output roller 24 and the first paper pusher roller 45 rotate in the same direction to feed the image medium. At the same time, the spring 44 pushes the swing end 43 of the swing arm 41 upward, so that the image medium is fed out of the paper output port 22 at an angle parallel to the paper output tray.

[0026] And such Figure 4 As shown, when the scanned image medium is a thick paper or a book, or other materials that are difficult to bend, the image medium does not bend due to the upward push of the swing end 43. On the contrary, due to the high rigidity of the image medium, the swing end 43 is pressed downward by the image medium when the image medium is fed through the first paper pusher 45, and the image medium is fed horizontally through the paper outlet 22.

[0027] In summary, the paper-pushing mechanism 40 in this invention lifts the first paper-pushing roller 45 upwards via a swing arm 41, thereby feeding the image medium out of the paper outlet 22 at an angle approximately parallel to the output tray. This effectively reduces the problem of the image medium curling or slowing down after impacting the output tray and avoids paper output errors.

Claims

1. A paper pusher mechanism applied to a scanning device, characterized in that: The scanning device has a paper outlet and a first paper outlet wheel arranged near the paper outlet. The paper pushing mechanism comprises a swing arm arranged near the paper outlet and comprising a connecting end pivoted to the scanning device and a swing end extending toward the paper outlet; a spring having two ends connected to the scanning device and the swing arm respectively; a first paper pushing wheel pivoted to the swing end of the swing arm; and a transmission mechanism connected between the first paper outlet wheel and the first paper pushing wheel, so that the first paper pushing wheel and the first paper outlet wheel rotate in the same direction.

2. The sheet advance mechanism of claim 1 wherein: The scanning device has a frame; a driving motor arranged in the frame; a paper feeding channel accommodated in the frame and comprising at least one paper inlet and the paper outlet; a first paper outlet wheel arranged on the paper feeding channel near the paper outlet and arranged on the lower side of the paper feeding channel and connected to the driving motor; a second paper outlet wheel arranged on the paper feeding channel near the paper outlet and arranged on the upper side of the paper feeding channel and abutting against the first paper outlet wheel; and wherein the connecting end of the swing arm is coaxially arranged with the first paper outlet wheel.

3. The sheet advance mechanism of claim 2 wherein: The spring is a torsion spring and comprises a body portion sleeved on the rotating shaft of the first paper outlet wheel, a fixed side extended from one end of the body portion and fixed to the frame, and a force applying side extended from the other end of the body portion and fixed to the swing arm.

4. The sheet advance mechanism of claim 2 wherein: The paper feeding channel comprises a horizontal paper feeding channel extending through the front and rear ends of the frame and a continuous paper feeding channel extending from the top end of the frame to the horizontal paper feeding channel.

5. The sheet advance mechanism of claim 2 wherein: The transmission mechanism comprises a transmission gear assembled on the rotating shaft of the first paper outlet wheel, a driven gear assembled on the rotating shaft of the first paper pushing wheel, and a relay gear assembled on the swing arm and connected between the transmission gear and the driven gear.

6. A scanning device, characterized by The application relates to a paper feeding device, which comprises a frame, a driving motor arranged in the frame, a paper feeding channel arranged in the frame and comprising at least one paper inlet and one paper outlet, at least one paper feeding wheel arranged on the paper feeding channel and connected with the driving motor, a scanning light machine arranged on the paper feeding channel to read an image medium, a first paper outlet wheel arranged on the paper feeding channel close to the paper outlet, the first paper outlet wheel being arranged on the lower side of the paper feeding channel and connected with the driving motor, a second paper outlet wheel arranged on the paper feeding channel close to the paper outlet, the second paper outlet wheel being arranged on the upper side of the paper feeding channel and abutting against the first paper outlet wheel, a swing arm arranged on the paper feeding channel close to the paper outlet, the swing arm being arranged on the lower side of the paper feeding channel and comprising a connecting end pivoted with the frame and a swing end extending towards the paper outlet, a spring having two ends connected with the frame and the swing arm respectively to push the swing end towards the upper side of the paper feeding channel, a first paper pushing wheel pivoted with the swing end of the swing arm, a second paper pushing wheel arranged on the paper feeding channel close to the paper outlet, the second paper pushing wheel being arranged on the upper side of the paper feeding channel and abutting against the first paper pushing wheel when the swing arm swings upwards, and a transmission mechanism connected between the first paper outlet wheel and the first paper pushing wheel to make the first paper pushing wheel and the first paper outlet wheel rotate in the same direction.

7. The scanning device of claim 6, wherein: The connecting end of the swing arm is coaxially arranged with the first paper outlet wheel.

8. The scanning device of claim 6, wherein: The spring is a torsion spring and comprises a body part sleeved on the rotating shaft of the first paper outlet wheel, a fixed side extended from one end of the body part and fixed on the frame, and a force applying side extended from the other end of the body part and fixed on the swing arm.

9. The scanning device of claim 6, wherein: The paper feeding channel comprises a horizontal paper feeding channel extending through the front and back ends of the frame and a continuous paper feeding channel extending from the top end of the frame to the horizontal paper feeding channel.

10. The scanning device of claim 6, wherein: The transmission mechanism comprises a transmission gear arranged on the rotating shaft of the first paper outlet wheel, a driven gear arranged on the rotating shaft of the first paper pushing wheel, and a relay gear arranged on the swing arm and connected between the transmission gear and the driven gear.

Images