TWI381949B - Automatic document feeder - Google Patents

Description

Automatic paper feeding device

The present invention relates to an automatic paper feeding device, and more particularly to an automatic paper feeding device capable of eliminating jams.

A variety of machines equipped with automatic paper feeding devices to provide automatic paper feeding functions, such as printers, scanners, and fax machines, are common computer peripherals. As shown in FIG. 1, FIG. 1 is a schematic structural view of a conventional automatic paper feeding device 1. The conventional automatic paper feeding device 1 includes a paper feeding passage 11 and a paper separating structure 12. The paper separation structure 12 includes a paper separation roller 121, a paper separation pad 122, a body 123, and an elastic member 124. The separation pad 122 is attached to the surface of the base 123, and the elastic member 124 is disposed below the base 123. The elastic force provided by the elastic member 124 causes the separation pad 122 to abut against the separation roller 121 to function as a separation paper.

Once the above-mentioned conventional automatic paper feeding device 1 has a paper jam, the paper in the paper feeding path 11 will be caught between the paper separating pads 122 and the paper separating wheel 121 which are pressed against each other, and the paper separating structure 12 at this time is not allowed. Not only can not play the paper separation function, but the user can not smoothly eliminate the paper jam.

The main object of the present invention is to provide an automatic paper feeding device for facilitating the elimination of paper jams, and more particularly to an automatic paper feeding device for changing the pressing relationship between the paper separating roller and the paper separating friction plate by interlocking the crank with the upper cover.

In an embodiment, an automatic paper feeding device includes: a casing; an upper cover; a paper separation device including a paper separation roller, a paper separation friction plate and a first elastic member, wherein the first The elastic member provides an elastic force to press the separation roller and the separation friction plate, and a crank is disposed under the upper cover, and one end of the crank is coupled to the housing by a second elastic member. And the other end of the crank has a first extension; wherein, when the upper cover is pressed, the upper cover pushes the crank to rotate in a first direction, and when the upper cover is opened, the upper cover and the crank Separating, and the second elastic member drives the crank to rotate in a second direction, so that the first extension of the crank is lifted up and pushes a second extension of the separation fin to enable the separation friction plate to Resisting the elastic force of the first elastic member to be separated from the separation roller.

In a preferred embodiment, the crank is provided with a slope, and a lower surface of the upper cover is provided with a pressing block. When the upper cover is pressed, the pressing block touches the inclined surface to rotate the crank in the first direction.

In a preferred embodiment, the first extension of the crank has a recess, and the second extension of the sheet friction pad includes a tab, wherein the tab extends into the recess.

In a preferred embodiment, the crank is L-shaped.

In a preferred embodiment, the first elastic element is a compression spring.

In a preferred embodiment, the second elastic element is a tension spring.

The present invention provides an automatic paper feeding device capable of eliminating jams, as shown in Figs. 2A and 2B, and Figs. 2A to 2B are side views of a preferred embodiment of the automatic paper feeding device of the present invention. The automatic paper feeding device 2 includes a casing 21, an upper cover 22, a paper separating device 23, a crank 24, and a second elastic member 25. The paper separating device 23 is disposed under the upper cover 22, and further includes a paper separation roller 231 disposed on the paper take-up arm 20, a paper separation friction plate 232 and a first elastic member 233, wherein the paper separation friction plate 232 has a second extension portion 234. It is disposed between the separation roller 231 and the first elastic member 233. In the preferred embodiment, the first resilient member 233 is a compression spring. By the elastic force T provided by the first elastic member 233 under the separation sheet 232, the separation roller 231 and the separation sheet 232 are pressed against each other to avoid multiple feeding of the sheet.

The crank 24 disposed under the upper cover 22 has one end coupled to the housing 21 by a second elastic member 25. In the preferred embodiment, the second elastic member 25 is a tension spring. The other end of the crank 24 has a first extension 241 corresponding to the second extension 234 of the separation sheet 232.

Referring to Fig. 2A, the state of the crank 24 when the upper cover 22 is depressed is shown. When the upper cover 22 is depressed, the upper cover 22 pushes the crank 24 to rotate in the first direction A. In order to enable the upper cover 22 to smoothly push the crank 24, one end of the crank 24 is provided with a slope 242, and a pressing block 222 is disposed on the lower surface 221 of the upper cover 22. When the upper cover 22 is pressed down, the pressing block 222 touches the inclined surface 242. The crank 24 is rotated in the first direction A.

Please refer to FIG. 2B, which shows the state of the crank 24 when the upper cover 22 is opened. When the cover 22 When opened, the upper cover 22 is separated from the crank 24, and the second elastic member 25 drives the crank 24 to rotate in the second direction B, so that the first extension portion 241 of the crank 24 is lifted up and pushes the second extension portion 234 of the separation friction plate 232. The separation sheet 232 is made to resist the elastic force T provided by the first elastic member 233, thereby separating the separation roller 231 and the separation sheet 232 so that the user can smoothly remove the jammed paper when the user encounters a jam.

3A-3B, wherein FIG. 3A is a perspective view of FIG. 2A, and FIG. 3B is a perspective view of FIG. 2B. The connection relationship between the crank 24 and the friction plate 232 will be further described below with reference to FIGS. 3A and 3B. In order to clearly show the position of the friction plate 232, the pickup arm 20 and the separation roller 231 are not shown in FIGS. 3A to 3B. Referring to FIG. 3A, the crank 24 is L-shaped, and the first extending portion 241 of the crank 24 has a recess 2411, and the second extending portion 234 of the separating blade 232 includes a tab 2341, and the tab 2341 can be extended. The recess 2411 is for enhancing the stability of the first extension 241 and the second extension 234. Referring to FIG. 3A again, when the upper cover 22 is depressed, the pressing block 222 of the upper cover 22 pushes the inclined surface 242 of the crank 24 to rotate in the first direction A (see FIG. 2A). At this time, the separation friction plate 232 is not subjected to the crank. The push of the 24th. Referring to FIG. 3B, when the upper cover 22 is opened, the crank 24 is rotated in the second direction B (see FIG. 2B), so that the first extension portion 241 of the crank 24 is lifted upward, so that the tab 2341 extends into the first extension portion 241. In the recess 2411, the top sheet friction lining 232 is pushed upward, and the separation roller 231 is separated from the separation sheet 232.

According to the above description, the automatic paper feeding device of the present invention changes the pressing relationship between the separation roller 231 and the separation friction plate 232 by opening or closing the upper cover 22 by adding the crank 24 and interlocking it with the upper cover 22. , to achieve the purpose of let the automatic paper feeding device smoothly eliminate the paper jam.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the present invention. Within the scope of the patent application.

2‧‧‧Automatic paper feeder

20‧‧‧Tip arm

21‧‧‧ housing

22‧‧‧Upper cover

23‧‧‧Separation device

24‧‧‧ crank

25‧‧‧Second elastic element

221‧‧‧ lower surface

222‧‧‧Clamps

231‧‧‧Dividing roller

232‧‧ ‧ paper friction plate

233‧‧‧First elastic element

234‧‧‧Second extension

241‧‧‧First Extension

242‧‧‧Bevel

2341‧‧‧Tits

2411‧‧‧ recess

A‧‧‧First direction

B‧‧‧second direction

T‧‧‧ elastic

Figure 1 is a schematic view showing the structure of a conventional automatic paper feeding device.

Fig. 2A is a side elevational view of a preferred embodiment of the upper cover of the automatic paper feeding device of the present invention in a covered state.

Fig. 2B is a side elevational view of a preferred embodiment of the automatic paper feeding device of the present invention with the upper cover in an open state.

Figure 3A is a perspective view of Figure 2A.

Figure 3B: is a perspective view of Figure 2B

2. . . Automatic paper feeding device

20. . . Pick arm

twenty one. . . case

twenty two. . . Upper cover

twenty three. . . Paper separation device

twenty four. . . crank

25. . . Second elastic element

221. . . lower surface

222. . . Briquetting block

231. . . Paper separation roller

232. . . Paper friction plate

233. . . First elastic element

234. . . Second extension

241. . . First extension

242. . . Bevel

B. . . Second direction

Claims (6)

An automatic paper feeding device comprising: a casing; an upper cover; a paper separating device comprising a paper separation roller, a paper separation friction plate and a first elastic member, wherein the first elastic member provides an elastic force, so that the a separation roller and the separation friction plate are pressed together; and a crank is disposed under the upper cover, and one end of the crank is coupled to the housing by a second elastic member, and the other end of the crank has a first extension portion; wherein, when the upper cover is depressed, the upper cover pushes the crank to rotate in a first direction, and when the upper cover is opened, the upper cover is separated from the crank, and the second elastic member Driving the crank to rotate in a second direction, lifting the first extension of the crank upward and pushing a second extension of the separation fin, so that the separation friction plate resists the first elastic element Elastic and separate from the separation roller. The automatic paper feeding device of claim 1, wherein the crank is provided with a slope, and a lower surface of the upper cover is provided with a pressing block, and when the upper cover is pressed, the pressing block touches the inclined surface to make the The crank rotates in the first direction. The automatic paper feeding device of claim 1, wherein the first extension of the crank has a recess, and the second extension of the separation fin comprises a tab, wherein the tab extends Into the recess. The automatic paper feeding device of claim 1, wherein the crank is L-shaped. The automatic paper feeding device of claim 1, wherein the first elastic member is a compressed spring. The automatic paper feeding device of claim 1, wherein the second elastic member is a tension spring.