TW200536766A - Automatic document feeder for a printer - Google Patents

Abstract

An automatic document feeder (ADF) comprising a document separating plate, a document tray, a drive roller, a presser arm, and an elastic component is provided. The document tray is tilted on the document separating plate, and the drive roller is positioned on the document tray for driving a document downward and leaving the ADF through the document separating plate. The presser arm is positioned on the document separating plate and connects to the drive roller. The elastic component connecting to the presser arm is provided with an elastic force to draw the drive roller moving toward the document tray. Thus a distance between the drive roller and the document tray may be adjusted according to the thickness of document automatically.

Description

200536766

[Technical field to which the invention belongs] The present invention relates to a paper device, and in particular, to a paper mechanism, a paper feeding mechanism using the seed feeding mechanism, and a printing device using a fixed paper feeding mechanism. Printing wheel to drive the document's previous technology]

Press, in the facsimile machine, printer, etc., in order to meet the requirements of a large number of paper operations. Users can put a large amount of paper into the paper to separate the paper, and perform the operations such as printing, printing, and photocopying. Even the design requirements of multi-function MFPs usually have a paper feeder in this paper feeding mechanism, and the paper feeding mechanism is fed into the machine for transmission.

Please refer to the schematic diagram of the 'series-typical paper feeding mechanism' shown in the figure. As shown in FIG. 2, the paper feeding mechanism 10 has a paper loading slot 12, a paper separation cry 14, two turning surfaces 16, a take-out, an arm 18 and a paper take-up roller 19. Among them, the two ends of the turn 16 are fixed to both sides of the paper placement slot, and the separator 14 is installed at the lower end of the paper placement slot 12. At the same time, one end of the '= arm 18 is connected to the rotating shaft 16, and the other end is connected with a paper picking roller 19. With the paper in the paper loading slot 12, changing the 'paper picking arm 18 is rotated around the rotating shaft 16 as the center to adjust: For the position of the roller 19, the paper picking roller 19 is continuously pressed against the top of the paper. 4 And the positive force of the paper take-up roller, it is worth noting that in the paper feeding mechanism 10 of the first figure, 19 must be continuously pressed on the upper surface of the paper, and the paper 1 is applied.

200536766

To generate enough friction to drive the paper. Please refer to the second A and β diagrams, which are side views of the paper feeding mechanism of the first diagram in a full paper state and an empty paper state. As shown in the figure, the torque τ generated by the rotation of the rotating shaft 丨 6 not only drives the paper pickup roller i 9 on the paper pickup arm 1 8 to rotate, but also drives the paper pickup arm 丨 8 to rotate in the forward direction, so that the paper pickup roller 19 is pressed on the upper surface of the paper 20, and a sufficient positive force is applied to the paper 20. In addition, when the paper pickup roller 19 drives the paper 20 to be fed downward, the lower edge of the paper 20 is blocked by the separators 4 and buckling occurs. This bending action causes the outermost paper 20 to be separated from other papers, and can be fed out separately. As shown in FIG. 2A, in the full paper state, the contact position between the pickup roller 19 and the paper 2j is p1, and the paper separation distance between p 丨 and the separator 丨 4 is D 丨. As the quantity of paper 20 decreases until the empty paper state shown in the second β diagram, the paper picking roller 19 is pressed to the bottom surface of the paper loading slot 12, and its contact position with the paper loading slot 12 is P2 ', and P2 and The paper separation distance of the paper tray 14 is D2. As described above, as the number of sheets 20 changes, the movement path of the pickup roller 19 is an arc S with the axis of rotation 16 as the center. Conversely, the position of the separator 14 is fixed. Therefore, as the quantity of paper changes, the contact position of the pickup roller 9 and the paper 20 also changes continuously, resulting in a change in the separation distance. Please refer to the third figure, which is a schematic diagram of another typical paper feeding mechanism. Compared with the paper feeding mechanism in the first figure, the shaft 2 6 of the paper feeding mechanism is installed under the paper slot 22, and the paper picking arm 28 is pressed upward and right to the paper surface. Since the paper picking arm 28 is also connected to the rotating shaft 26, as the quantity of paper changes, the moving path of the paper picking roller 29 forms an arc S 'centered on the rotating shaft 26. As a result, the contact position of the pickup roller 29 and the paper is constantly changing, and

200536766

V. Description of the invention (3) Changes in the separation distance. ’The paper is blocked by the separator. However, excessive distortion will affect the separation. Conversely, if the separation distance is difficult to produce distortion. In this case, the paper roller must exert more resistance on the paper and it is relatively increased. Therefore, the paper is easily damaged. At the same time, the pickup roller idles. If it is too small, it will affect the efficiency of paper separation. However, regardless of the distance of the first picture, it will change significantly with the placement, that is, the stability of paper separation cannot be maintained. At the same time, the work of the office machine will be changed, and the efficiency will change = 2The design of the lost-feed mechanism is the most in need of improvement. Generally speaking, the longer the paper separation distance is, the larger the buckling effect is, which leads to the reduction of the paper jam phenomenon and the rigidity of the leading edge of the paper is increased. If you want to distort the paper, take friction, and The paper produced by the separator will be subjected to a large force, and the excessive resistance for the paper benefit will easily lead to the above. If the separation distance is too large, it will cause paper jams or paper damage, etc. or the third figure. In the paper mechanism, the number of sheets separated in the paper loading slots 12 and 22 is stable and consistent.爰 Yes' In order to improve the paper and paper breakage phenomenon of the paper feeding mechanism, in order to increase the waste of paper removal time, how to improve the separation as much as possible to maintain a certain value, has become [inventive content] the main purpose of the present invention is to provide a paper feeding mechanism, Regardless of how the amount of paper in the slot is set, it has a consistent paper separation ancestor to provide a stable paper feeding effect. 200536766 V. Description of the invention (4) The paper feeding mechanism of the present invention is used to feed paper into a separating paper board and a paper feeding tray and take-up roller member; wherein the upper wheel system of the paper board is located on the feeding board and downwards through the 'dividing board The paper feeding board of the obliquely standing paper support plate is connected, and the paper driving is provided to provide a force to drive the distance. The movement range of the arm that can feed the paper support plate is in the hair spring, so that the paper is removed, and the spring is reversed. The distance of the hair along the parallel sub-plate, under the hair spring, so that the paper is taken, the stretch bomb is driven on the hair to drive the paper. Therefore, the paper is driven by the hair to be larger than the Ming roller. The side that provides a solid cardboard is the so-called solid one. The roller can provide a solid-arm oblique glide at the spring. The oblique solid-arm oblique glide is located on the front side of the paper feed and is incorporated into the roller of the office machine. The paper roller cooperates with the paper full and empty embodiments to move closer to the most substantially large embodiment, and the paper separation distance to move forward. In the embodiment, to move closer to the most substantially large embodiment to make the sexual component Shi The paper support plate of the business jet is pressed and pressed into the paper; the elastic member of the paper picking arm is close to the thickness of the paper, and the elastic member in the case of dynamic paper is far away from the paper input tray. The paper arm is pulled to keep it away. The elastic member is away from the paper feed tray and has a small similar force. It is directly used by the pick roller. Use the paper take-up roller to directly hold the paper machine's paper take-out arm. The paper inlet is placed on the paper, so that it is connected to and the paper is adjusted. Paper thickness Use a board position moment. The paper picking rollers include the elasticity of a and the paper picking roller, and the paper picking roller, the paper picking arm, the paper roller and the paper picking degree change. Circumstances of twisting the rollers, making the wheel and the separator use a tensioning spring position. The paper picking arm continues to press on the paper The paper picking arm continues to press on the paper Φ

Page 9 200536766 Five 'Invention description (5) "' ~~ -----, therefore, the use of elastic members can be omitted. In one embodiment of the present invention, the direction of the paper feed tray and the paper pickup arm are perpendicular to each other to provide a stable forward force. The advantages and spirit of the present invention can be further understood by the following drawings. [Embodiment] In the following description, in order to obtain the consistency of the technical explanation of the present invention, therefore, in different embodiments, if there are elements with the same function but different shapes, the same name and The figure number indicates it. Please refer to the fourth figures A and B, which are side views of a preferred embodiment of the paper feeding mechanism of the present invention in a full paper state and an empty paper state. As shown in the figure, the paper feeding mechanism can be added to a MFP (not shown) or a printing device (not shown), or it can be directly installed in a MFP or a printing device. The paper mechanism includes a paper board 104, a paper feed tray 102, a paper pickup roller 109, and a paper pickup arm 108. Among them, the separation board 104 is aligned with the paper town entrance A of the business machine, and on the upper surface of the separation board 104, a paper input tray 102 is erected to place the paper 120. The paper picking roller 1 09 is located on the front side of the paper feed tray 102 and is pressed against the paper 120 to roll the paper 1 2 0 and feed it downwards through the separation board 1 104 into the MFP. The paper picking arm 108 is located above the separation board 104, and is connected to drive the paper picking roller 1109. It is worth noting that the moving range of the aforementioned paper picking arm 108 is larger than the thickness change of the paper in the case of full and empty paper. Therefore, the distance between the paper picking roller 109 and the paper feed tray 102 is

Page 10 200536766

V. Description of the invention (6) It can adjust dynamically with the thickness of the paper 120. It is worth noting that, in this embodiment, the state of feeding the paper is described, but it is not limited to this. The paper feeding device of the present invention can be applied to other types of recordable media, such as slides. As shown in the figure, a roller guide 106 is provided adjacent to the paper feed tray 102 in order to move the paper take-out arm 108 of the guide bow I. In order to adjust the position of the paper picking arm 108 in accordance with the change of different paper thicknesses, an inclination angle χ is formed between the roller guide 106 and the paper feed tray 102. The paper picking arm 108 has a first protruding shaft 122 and a second protruding shaft 124, which are slidably engaged in the roller guide 106, respectively. Therefore, it can be ensured that the paper picking arm 108 can move in the direction of the parallel roller guide 106, in other words, the paper picking roller 109 is arranged on the roller guide 106 in a movable manner. In addition to the first protruding shaft 122 and the second protruding shaft 124 provided on the paper picking arm 108, in order to ensure the moving direction, as shown in the fifth A and B, 'a long protrusion can also be used 丨2 6 replaces the first protruding shaft 1 2 2 and the second protruding shaft 124. The width of the elongated protrusion 126 is approximately the same as that of the roller guide 106. Therefore, it can be ensured that the paper pickup arm Roll_slide 丨 〇6 moves linearly.

A tension spring (ten si onal spring) 110 is connected to the paper pickup arm along the direction of the roller guide rail 106 to provide a force to drive the paper pickup roller 109 to move relative to the paper feed tray. , And can selectively contact the paper 120 to drive the paper 丨 2 〇. In addition, in order to keep the distance between the paper picking roller 丨 0 9 and the separation board 1 04 (the so-called paper separation distance a) in a full paper state and an empty paper state, the direction of the roller guide 丨 〇6 Parallel to the direction of the separation board 104, the paper picking arm 108 drives the paper picking roller 109,

200536766 V. Description of the invention (7) It moves in the direction of the parallel separating board 104. In addition, in order to further ensure that the moving direction of the paper picking arm 108 is parallel to the direction of the cardboard 104, please refer to FIG. The paper feed arm 102 is provided adjacent to the paper feed tray 102, and the paper picking arm 108 has a first protruding shaft 152 and a second protruding shaft 15 centers, which are respectively slidably fitted into the two guide grooves 142 and 144, and The paper roller 109 is disposed between the two protruding shafts 152 and 154. Therefore, it can be ensured that the pickup roller 109 can move in the directions of the guide grooves 142 and 144.

The paper feeding mechanism is installed in the printing device, and the paper feed tray 10, the separating board 10, 4 and the roller guide 1 06 are all arranged on the casing of the printing device. . That is, corresponding to the paper picking arm 8 and the paper picking roller 1 10, it is fixed. In addition, there is an inclination angle X between the roller guide and the paper feed tray. When the angle of the inclination angle X is 90 degrees, the roller guide 106 and the paper feed tray 1 0 2 They are substantially perpendicular to each other, and the elastic restoring force of the aforementioned tension springs can be fully converted into a forward force, so that the paper picking rollers are pressed against the paper 120, and thus can be used as a stable source of positive force.

It is worth noting that in the present invention, the position of the paper picking arm 1 08 is dynamically changed as the number of sheets 1 20 changes. Therefore, the traditional transmission method as shown in Figure 2A is not suitable for this. . In order to solve this problem, the present invention utilizes the design of a Swing Gear group to transmit the power of the motor to the pickup roller 109. As shown in FIG. 4A, the rotating gear set 130 includes a rotating plate 132, a central gear 134, and a rotating gear 136. The central gear 134 and the rotating plate 132 are connected to a motor (not shown). Rotation

Page 12 200536766 V. Description of the invention (8) At the same time, the sun gear 1 3 4 and the rotating gear 1 3 6 are positioned on the rotating plate 132 and are coupled with each other. The power generated by the motor not only drives the rotating plate 1 2 2, but also turns the rotating gear 1 3 6 to the relay gear 138 on the paper picking arm 10 9. At the same time, through the rotation of the central gear 134 and the rotary gear 136, the paper take-up roller 1109, which is connected to the relay gear 1 38, is driven to rotate. In the foregoing embodiment, the tension spring 11 0 is used as a source of force for driving the paper pickup roller 10 9 to press against the surface of the paper 120, but it is not limited to the use of the tension spring 1 1 0. Please refer to the seventh drawings A and B, which are side views of a paper feeding mechanism according to another embodiment of the present invention in a full paper state and an empty paper state. In this embodiment, a torsion spring 丨 2 is used instead of the tension spring 1 10 in the fourth A and B drawings to drive the paper picking roller 丨 9 to press onto the surface of the paper 丨 2 〇. It is worth noting that, in order to make the paper picking roller 丨 〇9 at the position closest to and away from the paper feed tray 102 (that is, the empty paper state and the full paper state), the torsion spring 11 2 can provide a substantial size For similar moments, the original length of the torsion spring 2 should be increased as much as possible to reduce the elastic restoring force and the change of the spring unit length. In the foregoing embodiments of the fourth A and seventh A drawings, an elastic member 'β is used, which is a tensile spring and a torsion spring, and a force is applied to drive the paper take-up roller 1 0 9 to the surface of the paper 1 2 0. However, it is not limited to this. Please refer to the eighth A and \ figures. In yet another embodiment of the present invention, the aforementioned roller guide 106 is used as a chute, and the direction of the roller guide 丨 〇6 has an inclination angle y. 'While the paper picking arm 丨 08 slidingly engaged in the roller guide 106 is driven by its own weight, it slides down and continuously presses onto the paper 丨 2 〇. Therefore, the magnitude of the forward force acting on the paper surface by the paper picking roller 1 09 is subject to the aforementioned

Page 13 200536766 V. Description of the invention (9) The size of the inclination angle y and the weight of the paper picking arm 108 are determined, and the use of the elastic member can be omitted in this embodiment. It can be seen that, compared with the traditional paper feeding mechanism, the paper feeding mechanism of the present invention has the following advantages: 1. As shown in the fourth A, fifth A, and sixth figures, the present invention uses the roller guide 10 6 'to guide The moving direction of the paper arm 108 causes the paper picking roller 009 to move in a direction parallel to the separation board 104, so as to ensure that the separation distance is maintained at a distance. Therefore, the paper separation stability of the paper feeding mechanism can be improved while avoiding

The phenomenon of paper jam and paper breakage can improve the working efficiency of the MFP and save the time of clear paper removal. = As shown in the fourth A and seventh A diagrams, the present invention uses the elastic member 1 09 ^; ^ stretch elastic yellow 丨 1 〇 and twisted elastic cyan 11 2) as the paper take-up roller, the person Zhang 120 forward The main source of power. Therefore, it can be based on: High Feeder ::::;:? Provide a proper size of positive force. The above will brake the # η preferred embodiment of the present invention in detail, without restricting it to a slight change and: Those who are familiar with such arts will understand, Without deviating from the present invention, the entire meaning of the present invention will still be preserved, and also the spirit and scope.

200536766 Schematic description

Brief description of the diagram: Schematic diagram of the organization. The paper feeding mechanism is in a full paper state and an empty paper state. The first picture is a typical paper feed. The second A and B pictures are side views of the first picture. The third diagram is another typical paper feeding mechanism. The fourth A and B diagrams are side views of the present invention in a feeding mode and an empty paper state. The fifth diagram A and B are the structure of the paper feeding machine of the present invention. Another side view of the conventional embodiment. The sixth diagram is the paper feeding mechanism of the present invention. The other seventh A and B diagrams are in the state of the paper feeder and empty paper of the present invention. Side view. The schematic. A preferred embodiment of the structure, in a paper-like structure, a slide view of a paper picking arm and a roller. A side view of an embodiment. Another embodiment of the structure, in a full paper state

The eighth diagrams A and B are side views of still another embodiment of the paper feeding mechanism of the present invention in a full paper state and an empty paper state. Figure number description:

Paper feed mechanism 10 points cardboard 14, 24, 104 Paper picking arm 1 8, 2 8 Paper 20, 120 Paper picking arm 1 0 8 Twist spring 11 2 Paper slot 1 2, 2 2 Rotary shaft 1 6, 2 6 Paper picking roller 19, 29, 109 Paper feed tray 1 0 2 Tension spring 11 0 Roller guide 1 0 6

Page 15 200536766 Brief description of the diagram Rotating gear set 1 3 0 Sun gear 1 3 4 Relay gear 1 3 8 Second protruding shaft 1 2 4, 1 5 4 Strip-shaped protrusions 1 2 6 Rotating plate 1 3 2 Rotate the gear 1 3 6 First protruding shaft 1 2 2, 1 5 2 Guide grooves 242, 244

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Claims (1)

200536766 VI. Scope of patent application Patent scope: 1. A printing device, including a casing, the casing includes; a paper feed tray, for recording media; a cardboard, located at the The leading edge of the paper feed tray is used to separate the recordable media from the paper feed tray one by one; and a guide is disposed adjacent to the paper feed tray and sandwiched between the paper feed tray and the paper feed tray. * Tilt angle; a pickup roller 'is movably arranged on the guide rail, so that the pickup roller can move relative to the paper feed tray, and can selectively contact the recordable medium to drive the recordable A medium; and an elastic member 'is disposed between the paper picking roller and the casing, and provides a force to drive the paper picking roller to move to the paper feed tray. 2. The printing device according to item 1 of the scope of patent application, wherein the guide rail is substantially parallel to the dividing board. 3) If the printing device of item 1 of the patent scope is cleared, it further includes a motor and a Swing Gear set fixed in the printing device, and the motor drives the paper fetching through the rotating gear set The wheel turns. For example, the printing device of claim 1 of the patent scope, wherein the elastic member 3 / Γ ί 弹 黄 (torsion Spring), when the paper picking roller is at the most, /, the position away from the recordable medium, The swivel springs all provide a substantially fixed amount of torque. "5. The printing device of item 1 in the scope of patent application, including a paper pickup arm Page 17 200536766 6. The scope of patent application is set on the guide rail, and the paper picking arm is provided with a first protruding shaft plate and a second protruding shaft 'which are respectively slidably fitted in the guide rail. ', 6. The printing device according to item 5 of the scope of patent application, wherein the guide rail includes two guide grooves parallel to each other, and the first protruding shaft of the paper picking arm and the second second shaft system slide separately. It fits in the two guide grooves, and the paper picking roller system is set ^ = 7. If the printing device in the scope of patent application item 1, it further includes a paper picking arm set on the guide, and the paper picking The arm has a long strip-shaped protrusion that slides into the guide rail, so that the paper picking arm can slide along the direction of the guide. 8. Two kinds of paper feeding mechanisms, which are installed in a printing device to insert the recordable body into the printing device. The paper feeding mechanism includes: a paperboard 'located at the media feed inlet of the printing device; "Tray support plate" is erected on the upper surface of the separation board to hold the recording medium; " J a pickup roller, located on the front side of the paper feed tray, and pressed onto the recordable medium 'to scroll the The recordable medium is moved downwards and fed into the printing device through the separation board; c μ knife • A paper extraction arm is located above the separation board and is connected to drive the paper extraction roller to match the thickness of the recordable medium Adjust the distance between the paper pickup roller and the paper feed tray; and ▲ an elastic member connected to the paper pickup arm to provide a force to drive the -hai paper pickup roller to close to the recordable medium. 3. The paper feeding mechanism according to item 8 of the patent application scope, wherein the elasticity is a tensionai spring. P.18 200536766 VI. Scope of Patent Application 1 〇 If the scope of patent application, the paper machine is a torsion spring. ^ τ Α The flat member U moves like the paper feeding mechanism of item No. 8 in the scope of ^ Specialist Lee, its +, the load arm of the paper pickup arm can be used as “可 圮 = ί paper tray, full of recordable media and The thickness variation between recorded media without J d J 5 has been added. The paper feeding mechanism of the 8th patent scope of Rotary I, including a motor and a suspicious gear set fixed to the column e ^ Rotary teeth & quot And with a device, and the 1H motor is used to rotate the paper picking roller through the initial u wheel set γ. 13 · A paper feeding mechanism, which is installed in a printing device, h® HA ^ ^ ^ 以The printing device for a recordable medium, the paper feeding mechanism includes: a paper board, which is located at the media feed inlet of the printing device; a second paper tray for the recording medium ^ 'stands on the upper surface of the paper board to place the paper The media S / decay wheel 1 is located on the front side of the paper feed tray, and is pressed against the paperboard to feed the printing media to move downwards, via the sub-bevel angle =, above the sub-board 'And, when its direction has a -tilt, the chute is connected to the paper picking roller, and the paper picking roller is continuously pressed on the recordable " Slant oblique downwards' ... If the paper feeding mechanism of the scope of patent application No. 13 is recovered, the movement range of the paper picking arm is larger than the paper feed tray F, and any thickness change between the recordable media is loaded. Ljiluyi 200536766 6. Application scope of patent !!. Λ Shen Λ Patent scope item 13 The paper feeding mechanism further includes a plate-slaving gear set fixed in the printing device, and includes a motor and the rotating gear set. " Such as # $ /, and the motor is to rotate the paper picking roller through the jf. • A paper feeding mechanism, the device is arranged in a row to feed the printing equipment ^ ^ ^ 'column p, set, to record the media 4 1 clothing, the paper feeding mechanism includes:: cardboard, located in the row The media feed inlet of the printing device. Record: The paper support plate stands on the upper surface of the paperboard to place the recordable front side of the paper input support plate, and it fits in the scrollable and recordable Μ 体 伟 6 π paperboard is fed into the printing device; / ,,-° is moved through the points to drive: 2 cooker's located on the paperboard #, and connected to the paper take-up roller, and two paper-rollers move along substantially parallel to the The direction of the separating cardboard is connected to the paper picking arm, and a force is provided to drive the roller to close to the recordable medium. The paper feeding mechanism of item 16 in the patent scope of Rushen Eye, wherein the elastic structure 丨 卞 you-tension spring. &Amp; The paper feeding mechanism according to item 16 of the patent application scope, wherein the elastic structure IWl is a spring. The paper feeding mechanism of Item 16 of the mobile patent scope, wherein the loading range of the paper picking arm is larger than the thickness of the paper feed tray and is filled with the recordable medium and the recordable medium. The paper-feeding mechanism of Shenyan's patent scope No. 16 further includes a motor and Page 20 200536766 Page 21