TW501977B - Automatic paper feeding mechanism with automatic adjustment function - Google Patents

Abstract

The invention relates to an automatic paper feeding mechanism with automatic adjustment function for feeding a document into a processing device for post processing. The automatic paper feeding mechanism comprises a paper separating panel, a paper pick-up roller forming a passage with the paper separating panel to allow the document to be frictionally driven by the paper pick-up roller to pass through the passage, and an adjusting column having a first end fix connected to the paper separating panel. When the force applied by the paper pick-up roller to the paper separating panel is not uniform, the paper separating panel can response to the non-uniform force to rotate with a second end of the adjusting column as a pivot, so as to adjust the force applied by the paper pick-up roller to the paper separating panel.

Description

501977 V. Description of the invention (1) Field of the invention The present invention relates to an automatic paper feeding mechanism, especially an automatic paper feeding mechanism with an automatic adjustment function, so as to obtain a stable and even forward force when feeding paper. 0 Background of the invention The paper function is a function that is required by many business machines. For example, a fax machine, a photocopier, a printer, or a scanner has an automatic paper feeding mechanism (ADF) to feed the paper in the paper cassette into the machine body. Please refer to the first figure, which illustrates a conventional automatic paper feeding mechanism. The automatic paper feeding mechanism includes an ADF body 11, a paper take-up roller 12, a paper board 13, and a compression spring 14. When the paper picking action starts, according to the thickness of the paper, through the adjustment of the compression spring 14, one by one enters the separation board 13 one by one, and is driven forward by the friction between the paper picking roller 12 and fed. The machine itself performs the necessary processing such as photocopying, scanning, and faxing. In this conventional automatic paper feeding mechanism, the separating paperboard 13 is supported by the compression spring 14 and is used to adjust the sequential feeding of the paper. Therefore, the compression spring 14 must meet both the support strength and the average pressure of the dispersed roller. Required, otherwise there will be problems of insufficient support or multiple feeding. Even so, it is not easy to control the manufacturing and / or assembly tolerances of the automatic paper feeding mechanism. It still often causes the left and right pressures of the take-up roller 12 on the separation board to be different, which makes the separation force uneven, and it is prone to multiple paper feeds. Situation.

501977 V. Description of the invention (2) Summary of the invention Therefore, one of the purposes of this case is to provide an automatic paper feeding mechanism with an automatic adjustment function, which allows the paper separation board to have a slight degree when the force of the paper pickup roller on the paper separation board is uneven. Deviation, so that the positive force of the separation is maintained uniform. Another purpose of this case is to provide an automatic paper feeding mechanism with an automatic adjustment function, which can use a soft spring with a long compression stroke without affecting the support strength, in order to absorb manufacturing and assembly tolerances, and The positive force of the paper is uniform. The first aspect of the case relates to an automatic paper feeding mechanism with an automatic adjustment function for feeding a document into a processing device for subsequent processing. The automatic paper feeding mechanism includes a paper separating board; a paper taking roller forming a channel between the paper separating roller and the paper through the channel by frictional driving of the paper taking roller; and an adjusting post having a first end It is fixed to the separation board, and when the force applied by the pickup roller to the separation board is uneven, the separation board can be offset with the second end of the adjustment post as a fulcrum due to the uneven force. To adjust the force exerted by the paper pick-up roller on the separating board. Preferably, the automatic paper feeding mechanism further comprises a compression spring connected to the separation paperboard, so that the separation paperboard presses the paper to closely contact the paper picking roller when the paper enters the passage. The compression spring may be located on the same side of the separation board as the adjustment column system, and may be located on the separation board with the pickup roller.

501977 V. Different aspects of invention description (3). More preferably, a rubber sheet is provided on a surface of the separation board facing the pickup roller to further assist the document in close contact with the pickup roller. In one embodiment, the second end of the adjustment post and the body of the automatic paper feeding mechanism form a ball-and-socket joint structure, so that the adjustment post can be pivoted to drive the separating board to perform at least Two-dimensional offset. The ball-and-socket joint structure includes, for example, a ball located at the end of the adjusting column; and a seat constituting a part of the body of the automatic paper feeding mechanism for receiving the ball, and a surface inside the ball contacting the ball is Smooth the sphere so that the ball can rotate freely in it. The seat may include two flexible seat posts standing upright, forming a bottle-shaped gap between the two. When the ball and the seat are combined, the ball supports the bottle mouth portion and enters the bottle body portion, and is arranged. In it. Preferably, the bottle mouth portion of the bottle-shaped space is funnel-shaped to guide the ball through the bottle mouth portion of the bottle-shaped space into the bottle body portion. According to the present invention, the adjusting column can be formed integrally with the separating board to facilitate manufacturing and assembly. The automatic paper feeding mechanism of the present invention can be used in a facsimile machine, a photocopier, a printer or a scanner to feed an original to a corresponding facsimile device, photocopying device or scanner device for subsequent processing. Of course, the automatic paper feeding mechanism can also be used to feed blank paper to, for example, photocopiers or other machines. Another aspect of the case relates to an automatic paper feeding mechanism with an automatic adjustment function, including a paper separation board; a paper pickup roller forming a channel with the paper separation board, so that the document is driven by the friction of the paper pickup roller Through the pass

501977 V. Description of the invention (4) Road; and a ball-and-socket joint structure, which is connected to the separation board, and is pivoted when the pickup roller applies uneven force to the separation board, thereby driving the separation board to shift. To adjust the force exerted by the paper picking roller on the separating board ° Preferably, the automatic paper feeding mechanism further includes a compression spring connected to the separating board, so that when the document enters the channel, the separating unit The cardboard depresses the document to make close contact with the pickup roller. Preferably, the ball-and-socket joint structure may, but need not, perform at least two-dimensional pivoting at the same time, for example, it may perform front-to-back and / or left-to-right pivoting separately or simultaneously. The ball-and-socket joint structure preferably includes a ball, which is fixed to the paperboard; and a socket, which forms a part of the main body of the automatic paper feeding mechanism, and is used for accommodating the ball, and the inner surface of the ball is in contact with the ball. In order to smooth the sphere, the ball can rotate freely in it. The seat may include two flexible seat posts standing upright, forming a bottle-shaped gap between the two. When the ball and the seat are combined, the ball supports the bottle mouth portion and enters the bottle body portion, and is arranged. In it. Preferably, the mouth portion of the bottle-shaped space is funnel-shaped to guide the ball through the mouth portion of the bottle-shaped space into the bottle body portion, and the shoulder portion of the bottle body is arc-shaped, so that Let the ball spin freely in it. Preferably, the ball is integrally formed with the separation board. Preferably, a rubber sheet is provided on a surface of the separation board facing the pickup roller to facilitate close contact between the document and the pickup roller. Simple schema

501977 V. Description of the Invention (5) This case can be understood in more depth through the following drawings and detailed descriptions: The first figure ... It is a cross-sectional schematic diagram for explaining the conventional automatic paper feeding mechanism. Second figure: It is a schematic cross-sectional view of one embodiment of the automatic paper feeding mechanism in this case. The third figure (a) and (b): It is a perspective view of the paper separation adjustment plate of the automatic paper feeding mechanism in the second direction. The fourth figure (a): It is a front view of the assembly of the paper separation adjusting plate and the ball and socket joint structure of the automatic paper feeding mechanism in the second figure. The fourth figure (b): a cross-sectional top view extending along the line A-A 'of the ball and socket joint structure in the fourth figure (a). The components included in the drawings of this case are listed below: Known ADF body 1 1 Known divider board 1 3 ADF body 21 Paper separation adjustment plate 2 3 Rubber sheet 232 Ball 2 3 4 Spring fixing pin 2 3 6 Channel 25 Flexible seat post 2 6 1 Known paper picking roller 1 2 Known compression spring 1 4 Paper picking roller 2 2 Cardboard 2 3 1 Adjusting post 2 3 3 Locating pin 2 3 5 Compression spring 24 Bearing 2 6 Bottle shape Gap 2 6 2

501977 V. Description of the invention (6) Bottle mouth part 2 6 3 Bottle body part 2 6 4 Bottle body shoulder 2 6 5 For a description of the preferred embodiment, please refer to the second figure, which schematically shows the implementation of one of the automatic paper feeding mechanisms in this case. example. The automatic paper feeding mechanism of this embodiment includes an ADF body 21, a paper take-up roller 22, a paper separating adjustment plate 23, and a compression spring 24. The paper separation adjustment board 23 includes a paper separation board 231, a rubber sheet 232, and an adjustment column. Two positioning pins 235 are provided above the paper separation board 231, which can be quickly positioned and combined with the rubber sheet 232 that has been backed up. Below 231 is a spring fixing pin 236 which can receive and fix the compression spring 24. One end of the adjusting post 233 is fixedly connected to the separation board 231, and the other end is a round ball 234. Please refer to (a) and (b) in the third figure for the combination of the above components. The ball and a seat mechanism 26 on the ADF body 21 form a ball and socket joint structure. The socket 26 includes two flexible seat posts 2 6 1 opposite to each other, and a bottle-shaped gap 262 is formed between the two. When the ball 234 and the seat 26 are combined, the ball 234 supports the bottle mouth portion. 263 enters the bottle body portion 264 and is placed therein. Wherein, the bottle mouth portion 2 6 3 of the bottle-shaped space is funnel-shaped to guide the ball 2 3 4 through the bottle mouth portion of the bottle-shaped space into the bottle body portion 2 6 4 and the shoulder of the bottle body The portion 2 6 5 is arc-shaped, so that the ball 2 3 4 can rotate freely therein. ^ See the fourth figures (a) and (b). By the operation of the ball-and-socket joint structure ', the adjustment post 233 can be pivoted in the socket 26, thereby driving the sub-board 231 to yaw forward and backward and / or left and right.

501977 V. Description of the invention (7) ----- Please refer to the second figure again when the paper picking action is started, according to the adjustment of the compression spring 24 produced by the thickness of the document, one by one, one by one; cardboard 31 and In the channel 25 between the paper picking rollers 22, the document is brought into close contact with the paper picking rollers 22 with the help of a rubber sheet 232, and the frictional drive of the wheels 22 is advanced to feed into the machine body for photocopying j Scan, fax, etc. required processing. During the document transmission process, if the paper picking roller 2 2 evenly exerts force on the separation board 2 3 1, the documents can smoothly pass through the channel 2 5 one by one in order, without paper skew or multiple feeding. Case. However, because the control of manufacturing and / or assembly tolerances of the automatic paper feeding mechanism is not easy, there are occasions when the left and right pressures of the paper take-up roller 22 on the separation board 231 are different, and thus the separation force is uneven. At this time, the operation of the ball-and-socket joint structure can be used to make the paperboard 231 sway back and forth and / or right and left due to the uneven paper separation power. With the proper deflection of the separation board, the forward force exerted by the pickup roller 22 on the separation board 2 31 can be maintained uniform. Therefore, it is possible to avoid paper skew or multiple feeding. In a preferred embodiment, the separation board 2 3 1, the adjustment post 2 3 3, and the ball 2 3 4 may be integrally formed to simplify the manufacturing and assembly process. In addition, the assembly of a ball-and-socket joint structure composed of a ball and a socket is extremely simple, which is another advantage of the present invention. In addition, since the adjustment post can share the support of the cardboard with the compression spring, the compression spring can be selected to be softer and longer in compression stroke than the conventional one. In this way, the compression spring can absorb the manufacturing and assembly tolerances, so that the positive force of the paper separation becomes more uniform.

Page 10 501977 V. Description of the invention (8) The invention in this case can be modified by any person skilled in the art, but it is not inferior to those who want to protect the scope of the patent application.

Page 11 501977 Brief description of the drawings The first picture ... It is a schematic cross-section for explaining the conventional automatic paper feeding mechanism. _ Figure 2: This is a schematic cross-sectional view of one embodiment of the automatic paper feeding mechanism in this case. · The third picture (a) and (b): It is a perspective view of the separation adjustment plate of the automatic paper feeding mechanism in the second picture in different directions. The fourth figure (a): It is a front view of the assembly of the paper separation adjustment plate and the ‘ball and socket joint structure’ of the automatic paper feeding mechanism in the second figure. The fourth figure (b): a cross-sectional top view extending along the line A-A 'of the ball and socket joint structure in the fourth figure (a). _ «

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Claims (1)

501977 6. Scope of patent application Patent scope of application 1. An automatic paper feeding mechanism with an automatic adjustment function for feeding a document into a processing device for subsequent processing, which includes: a paper board; a paper take-up roller, and A passage is formed between the paper separation boards, so that the document passes through the passage by the frictional drive of the paper pickup roller; and an adjustment post, the first end of which is fixed to the paper separation board, and is applied to the paper separation roller When the force on the paperboard is not uniform, the paperboard can be offset with the second end of the adjustment post as a fulcrum due to the uneven force, so as to adjust the force exerted by the paper take-up roller on the paperboard. 2. If the automatic paper feeding mechanism of item 1 of the patent application scope further includes a compression spring connected to the distribution board, the distribution board presses the document to pick up the paper when the document enters the channel. The rollers are in close contact. 3. For example, the automatic paper feeding mechanism in the scope of the patent application, wherein the compression spring and the adjusting column are located on the same side of the paper separation board, and the paper picking roller is located on a different side of the paper separation board. 4. For example, the automatic paper feeding mechanism of the scope of patent application, wherein the second end of the adjusting post and the body of the automatic paper feeding mechanism form a ball-and-socket joint structure, so that the adjusting post can pivot to drive the separation board Perform at least two-dimensional offsets. 5. The automatic paper feeding mechanism according to item 4 of the patent application scope, wherein the ball-and-socket joint structure includes: a ball at the end of the adjusting post; and a socket forming a part of the body of the automatic paper feeding mechanism, for Accommodate this Page 13 501977 6. Scope of patent application For a ball, the inner surface of the ball that is in contact with the ball is a smooth surface, so that the ball can rotate freely in it. 6. For the automatic paper feeding mechanism of the scope of application for patent No. 5, wherein the base includes two flexible bases which are relatively upright, and a bottle-shaped gap is formed between the two. When the ball and the base are combined, The ball extends the bottle mouth portion into the bottle body portion, and is placed inside. 7. For the automatic paper feeding mechanism according to item 6 of the patent application scope, the bottle mouth portion of the bottle-shaped space is funnel-shaped to guide the ball through the bottle mouth portion of the bottle-shaped space into the bottle body portion. 8. The automatic paper feeding mechanism of item 1 of the patent application scope, wherein the surface of the separation board facing the paper picking roller has a rubber sheet to help the document in close contact with the paper picking roller. 9. For the automatic paper feeding mechanism according to item 1 of the patent application scope, wherein the adjusting post is integrally formed with the separation board. 10. If the automatic paper feeding mechanism of the first patent application scope, the document is a scanned original. 11. If the automatic paper feeding mechanism of item 10 of the patent application scope, wherein the processing device for subsequent processing is a facsimile device. 12. For the automatic paper feeding mechanism of the scope of application for patent No. 10, the processing device for subsequent processing is a photocopying device. 13. If the automatic paper feeding mechanism of item 10 of the patent application scope, wherein the processing device for subsequent processing is a scanner device. 14. An automatic paper feeding mechanism with automatic adjustment function, including: a piece of cardboard; Page 14 501977 Sixth, the scope of the patent application: a paper picking roller, forming a channel with the paper separation board, so that the document passes through the channel by frictional driving of the paper picking roller; and a ball and socket joint structure, connected to The paper separation board is pivoted when the force taken by the paper extraction roller on the paper separation board is uneven, and the paper separation board is driven to be offset, thereby adjusting the force applied by the paper extraction roller on the paper separation board. 15. For example, the automatic paper feeding mechanism of the scope of patent application No. 14 further includes a compression spring connected to the distribution board, so that when the document enters the passage, the distribution board presses the document to pick up the paper. The rollers are in close contact. 16. The automatic paper feeding mechanism according to item 14 of the patent application, wherein the ball and socket joint structure can be pivoted at least in two dimensions. 17. The automatic paper feeding mechanism according to item 16 of the patent application scope, wherein the ball-and-socket joint structure includes: a ball fixed to the paperboard; and a socket forming a part of the main body of the automatic paper feeding mechanism for The ball is received, and the surface inside the ball that is in contact with the ball is a smooth ball surface to facilitate the ball to freely rotate in the ball. 18. For an automatic paper feeding mechanism according to item 17 of the scope of patent application, wherein the socket includes two flexible seat posts which are relatively erected, forming a bottle-shaped gap between the two. When the ball and the socket are combined, The ball extends the bottle mouth portion into the bottle body portion, and is placed inside. 19. For example, the automatic paper feeding mechanism of claim 18, wherein the bottle mouth portion of the bottle-shaped space is funnel-shaped to guide the ball through the bottle mouth portion of the bottle-shaped space into the bottle body portion, and The shoulder of the bottle body is arc-shaped to facilitate the ball to rotate freely therein. Page 15 501977 VI. Scope of Patent Application 2 〇 If the automatic paper feeding mechanism of item 17 of the patent application scope, the ball is formed integrally with the paperboard. 2 1 · The automatic paper feeding mechanism according to item 14 of the patent application scope, wherein the surface of the separation plate facing the paper pick-up roller has a rubber sheet to help the document in close contact with the paper pick-up roller. Page 16