US20080303204A1 - Paper feeding device - Google Patents
Paper feeding device Download PDFInfo
- Publication number
- US20080303204A1 US20080303204A1 US11/758,586 US75858607A US2008303204A1 US 20080303204 A1 US20080303204 A1 US 20080303204A1 US 75858607 A US75858607 A US 75858607A US 2008303204 A1 US2008303204 A1 US 2008303204A1
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- US
- United States
- Prior art keywords
- arm
- paper
- feeding device
- paper blocking
- retaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0684—Rollers or like rotary separators on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/04—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to absence of articles, e.g. exhaustion of pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/60—Optical characteristics, e.g. colour, light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
- B65H2553/412—Photoelectric detectors in barrier arrangements, i.e. emitter facing a receptor element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/60—Details of intermediate means between the sensing means and the element to be sensed
- B65H2553/61—Mechanical means, e.g. contact arms
Definitions
- the present invention relates to a paper feeding device, and more particularly to a paper feeding device including a paper sensor which senses whether a sheet of paper is loaded.
- Recent business machines such as a scanner, a printer, a copier, etc.
- the business machine has a function of image disposing.
- An image disposing system of the scanner includes a glass plate, an optical system arranged under the glass plate for reading the image of the document placed on the glass plate.
- ADF automated document feeder
- a stack of documents are placed in a document tray of the ADF, then the documents are fed into the scanner and placed on the glass plate one by one by a paper feeding device of the ADF, at last, the optical system reads the image of the document.
- the paper feeding device further comprises a paper sensing unit which senses whether a sheet of paper is loaded.
- a conventional sensing unit includes a sensor and an obstructer.
- the sensor is U-shaped and arranged in a base of the paper feeding device, which has an emitting arm radiating light and a receiving arm receiving the light radiated from the emitting arm.
- the obstructer is rotatablely connected to the base, having a contacting arm and an obstructing arm. The contacting arm stretches out of the top surface of the base and the obstructing arm is arranged in the base.
- the obstructing arm When the paper is not loaded on the base, the obstructing arm is placed between the emitting arm and the receiving arm, then the light radiated from the emitting arm is blocked by the obstructing arm and the receiving arm can not receive the light, so the sensor stays in a turn-off status. In this situation, the pickup roller assembly wouldn't pick paper, even though a paper-picking signal is detected.
- the front end of the paper pushes the contacting arm to rotate anti-clockwise, so the obstructing arm also rotates anti-clockwise and departs from the sensor, as a result, the light radiated from the emitting arm is received by the receiving arm, then the sensor is turned on and decides that the paper is loaded on the base.
- the pickup roller assembly will pick up the paper into the paper feeding device if a paper-picking signal is detected at the time.
- the senor and the obstructer of the conventional paper sensing unit are both arranged in the base, so a special connecting portion is needed to connect the obstructer. Therefore the components are increased, the structure of the paper feeding device is complex and is not convenient to be assembled.
- an object of the present invention is to provide a paper feeding device, comprising a supporting frame, a pickup roller assembly, a paper blocking unit, a base and a sensor.
- the supporting frame has a pair of supporting boards mounted on the inner surface of the supporting frame.
- a pair of retaining portions projects from the inner surface of the supporting frame.
- the retaining portions includes a pair of plate-shaped retaining boards paralleling to each other, a retaining hole is opened in the retaining board.
- the pickup roller assembly mounted between the supporting boards picks up paper and then transferring it into the paper feeding device.
- the paper blocking unit is placed beside the pickup roller assembly and has a paper blocking element.
- the paper blocking element includes a connecting portion with a pair of positioning pillars protruding from the two sides.
- the positioning pillar is rotatablely connected to the retaining hole of the retaining portion of the supporting frame.
- the connecting portion extends downwards to form a paper blocking arm.
- the base has a paper loading base.
- the sensor is located in the base for sensing whether a paper is loaded on the paper loading base, and has an emitting arm and a receiving arm.
- the lower portion of the paper blocking arm can be located between the emitting arm and the receiving arm or depart from the emitting arm and the receiving arm.
- the senor is in turn-off status when the lower portion of the paper blocking arm is located between the emitting arm and the receiving arm, the sensor is in turn-on status when the lower portion of the paper blocking arm departs from the emitting arm and the receiving arm, the paper feeding device decides whether the paper is provided on the base by the turn-on/turn-off status of the sensor, so an additional obstructer is avoided, compared with the conventional paper feeding device, the structure of the present invention is simple, and it is convenient to assemble.
- FIG. 1 is an exploded perspective view of a paper feeding device of the present invention
- FIG. 2 is a partial enlarged view of the encircled portion labeled 11 shown in FIG. 1 ;
- FIG. 3 is a perspective view of a pickup roller assembly of the present invention.
- FIG. 4 is a perspective view of a blocking element shown in FIG. 1 ;
- FIG. 5 is a perspective view of a sensor of the present invention.
- FIG. 6 is a cross-sectional view showing no paper loaded on a base of the paper feeding device.
- FIGS. 7-9 are cross-sectional views for describing operations of the paper feeding device of the present invention.
- the paper feeding device 1 of the present invention includes a supporting frame 10 , a pickup roller assembly, a base 50 and a paper blocking unit 60 .
- FIG. 1 in combination with FIG. 2 , the supporting frame 10 is placed above the base 50 and a paper transporting passage 52 (shown in FIG. 6 ) is formed therebetween.
- a pair of supporting boards 15 are mounted on the inner surface of the supporting frame 10 and a receiving space 14 is formed therebetween.
- a retaining portion 11 projects from the inner surface of the supporting frame 10 .
- the retaining portion 11 include a pair of plate-shaped retaining boards 112 parallel to each other, and a restricting projection 113 is set therebetween.
- a retaining hole 111 is opened in the retaining board 112 .
- a pair of connecting portions 13 are mounted on the inner surface of the supporting boards 15 .
- the pickup roller assembly includes a roller frame 40 , a picking roller 20 , a conveying roller 30 and a belt 21 .
- the roller frame 40 has a first side wall 41 and a second side wall 42 , an active shaft 43 and an idle shaft 44 .
- One end of the active shaft 43 is fixed to the first side wall 41
- the other end of the active shaft 43 is fixed to and pass through the second side wall 42 for receiving a driving force.
- One end of the idle shaft 44 is fixed to the first side wall 41
- the other end of the idle shaft 44 is fixed to the second side wall 42 .
- the idle shaft 44 is above the active shaft 43 .
- a circle shaped restricting portion 425 projects from the inner surface of the second sidewall 42
- a sleeve portion projects from the inner surface of the second sidewall 42 and is above the restricting portion 425 .
- the conveying roller 30 is mounted around the active shaft 43 and one end of the conveying roller 30 is circled by the restricting portion 425 .
- the picking roller 20 is mounted around the idle shaft 44 and one end of the picking roller 20 is connected to the sleeve portion.
- the belt 21 is sleeved on both the conveying roller 30 and the picking roller 20 , and impels the conveying roller 30 and the picking roller 20 to press against the roller frame 40 for creating a friction between the conveying roller 30 and the restricting portion 425 and a friction between the picking roller 20 and the sleeve portion, which drives the roller frame 40 to rotate around the active shaft 43 .
- the paper blocking unit 60 includes a paper blocking element 61 and a projection 62 .
- the paper blocking element 61 has a connecting portion 611 . Two opposite sides of the connecting portion 611 project to form a positioning pillar 612 respectively.
- the front end of the connecting portion 611 extends upward to form a restricting arm 613 .
- the restricting arm 613 leans against the restricting projection 113 of the supporting frame 10 .
- the back end of the connecting portion 611 extends downwards to form a paper blocking arm 614 at the left, so an opening 615 is formed at the right of the paper blocking arm 614 .
- the lower portion of the paper blocking arm 614 is cut off at the left and thus forms a board-shaped obstructer 616 at the right.
- the projection 62 is cylindrical and projects from the outer surface of the first side wall 41 of the pickup roller assembly 20 .
- a paper loading base 51 is formed at the front of the base 50 for loading papers, the paper loading base 51 extends backwards and defines the paper transporting passage 52 between the base 50 and the supporting frame 10 .
- a long cavity 53 is lengthwise defined in the base 50 for receiving the obstructer 616 .
- the sensor 70 is electrically mounted on an electrical circuit board, the electrical circuit board is arranged in front of the cavity 53 (as shown in FIG. 6 ).
- the sensor 70 is approximately U-shaped, including an emitting arm 71 and a receiving arm 72 parallel to the emitting arm 71 .
- a connecting arm 73 connects the emitting arm 71 and the receiving arm 72 and is mounted on the electrical circuit board.
- the emitting arm 71 radiates light towards the receiving arm 72 .
- the receiving arm 72 receives the light and turns on the sensor 70 .
- the sensor 70 is a light sensor, however, a contact sensor or an electromagnetic sensor can also be used as the sensor 70 .
- the pickup roller assembly is assembled together. Secondly, the pickup roller assembly is received in the receiving space 14 of the supporting frame 10 , the left end of the active shaft 43 fixed to the first side wall 41 is rotatablely connected to one of the connecting portions 13 of the supporting frame 10 , the right end of the active shaft 43 fixed to the second side wall 42 passes through the other connecting portion 13 of the supporting frame 10 for connecting with a driving component (not shown).
- the paper blocking unit 60 is placed beside the first side wall 41 of the pickup roller assembly, the positioning pillar 612 of the paper blocking element 61 is rotatablely connected to the retaining hole 111 of the supporting frame 10 , the projection 62 stops at the connecting portion 611 of paper blocking element 61 .
- the supporting frame 10 covers on the base 50 , the obstructer 616 of the paper blocking arm 614 stretches into the cavity 53 of the base 50 , then the paper feeding device 1 of the present invention is assembled.
- the picking roller 20 keeps a certain distance from the papers 2 , the papers 2 are stopped outside by the paper blocking arm 614 , the obstructer 616 is located between the emitting arm 71 and the receiving arm 72 , so the light radiated from the emitting arm 71 is blocked by the obstructer 616 , the sensor 70 keeps in a turn-off status.
- the driving force drives the active shaft 43 to rotate clockwise, so the pickup roller assembly rotates clockwise around the active shaft 43 .
- the picking roller 20 contacts with the paper 2 .
- the projection 62 mounted on the first side wall 41 of the roller frame 40 also moves downwards and passes through the opening 615 of the paper blocking element 61 , so the projection 62 loses cooperation with the paper blocking element 61 , the paper blocking arm 614 rotates clockwise around the positioning pillar 612 and no longer stops the documents 2 .
- the paper feeding device 1 when the paper feeding device 1 picks up the paper 2 but no paper is provided on the paper loading base 51 or the paper is used up, the paper blocking arm 614 is in natural state under its own weight, and the obstructer 616 is located between the emitting arm 71 and the receiving arm 72 , so the light radiated from the emitting arm 71 is blocked by the obstructer 616 , the sensor 70 keeps in a turn-off status, as a result, the paper feeding device 1 stops to pick up papers.
- the driving force drives the active shaft 43 to rotate anti-clockwise, so the paper pickup assembly rotates anti-clockwise and moves upwards, so the picking roller 20 departs from the papers 2 , meanwhile, the projection 62 projected from the roller frame 40 passes through the opening 615 again in a anti-direction (shown in FIG. 4 ) and stops at the connecting portion 611 of the paper blocking element 61 , the restricting arm 613 stops at the restricting projection 113 of supporting frame 10 , as shown in FIG. 6 , the paper feeding device 1 returns to natural state.
- the sensor 70 is in turn-off status when the obstructer 616 of the paper blocking arm 614 is located between the emitting arm 71 and the receiving arm 72 , the sensor 70 is in turn-on status when the obstructer 616 of the paper blocking arm 614 departs from the emitting arm 71 and the receiving arm 72 , the paper feeding device 1 decides whether the paper is provided on the base 50 by the turn-on/turn-off status of the sensor, so an additional obstructer is avoided.
- the structure of the present invention is simple and convenient to assemble.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
A paper feeding device comprises a supporting frame, a pickup roller assembly, a paper blocking unit, a base and a sensor. The paper blocking unit is placed beside the pickup roller assembly, having a paper blocking element connected to the supporting frame, including a connecting portion, the connecting portion extends downwards to form a paper blocking arm. The sensor is located in the base, having an emitting arm and a receiving arm. The lower portion of the paper blocking arm can be located between the emitting arm and the receiving arm or depart from them for turning off/on the sensor. The paper feeding device decides whether the paper is provided on the base by the turn on/off status of the sensor, so an additional obstructer is avoided. Compared with conventional paper feeding device, the structure of the present invention is simple, and it is convenient to assemble.
Description
- 1. Field of the Invention
- The present invention relates to a paper feeding device, and more particularly to a paper feeding device including a paper sensor which senses whether a sheet of paper is loaded.
- 2. The Related Art
- Recent business machines, such as a scanner, a printer, a copier, etc., are broadly required in the office operation. The business machine has a function of image disposing. Take a conventional scanner as an example. An image disposing system of the scanner includes a glass plate, an optical system arranged under the glass plate for reading the image of the document placed on the glass plate. As a result of the application of an ADF (automatic document feeder), a stack of documents are placed in a document tray of the ADF, then the documents are fed into the scanner and placed on the glass plate one by one by a paper feeding device of the ADF, at last, the optical system reads the image of the document.
- In the scanner, the paper feeding device further comprises a paper sensing unit which senses whether a sheet of paper is loaded. A conventional sensing unit includes a sensor and an obstructer. The sensor is U-shaped and arranged in a base of the paper feeding device, which has an emitting arm radiating light and a receiving arm receiving the light radiated from the emitting arm. The obstructer is rotatablely connected to the base, having a contacting arm and an obstructing arm. The contacting arm stretches out of the top surface of the base and the obstructing arm is arranged in the base. When the paper is not loaded on the base, the obstructing arm is placed between the emitting arm and the receiving arm, then the light radiated from the emitting arm is blocked by the obstructing arm and the receiving arm can not receive the light, so the sensor stays in a turn-off status. In this situation, the pickup roller assembly wouldn't pick paper, even though a paper-picking signal is detected. When the paper is loaded on the base, the front end of the paper pushes the contacting arm to rotate anti-clockwise, so the obstructing arm also rotates anti-clockwise and departs from the sensor, as a result, the light radiated from the emitting arm is received by the receiving arm, then the sensor is turned on and decides that the paper is loaded on the base. The pickup roller assembly will pick up the paper into the paper feeding device if a paper-picking signal is detected at the time.
- However, the sensor and the obstructer of the conventional paper sensing unit are both arranged in the base, so a special connecting portion is needed to connect the obstructer. Therefore the components are increased, the structure of the paper feeding device is complex and is not convenient to be assembled.
- Accordingly, an object of the present invention is to provide a paper feeding device, comprising a supporting frame, a pickup roller assembly, a paper blocking unit, a base and a sensor. The supporting frame has a pair of supporting boards mounted on the inner surface of the supporting frame. A pair of retaining portions projects from the inner surface of the supporting frame. The retaining portions includes a pair of plate-shaped retaining boards paralleling to each other, a retaining hole is opened in the retaining board. The pickup roller assembly mounted between the supporting boards picks up paper and then transferring it into the paper feeding device. The paper blocking unit is placed beside the pickup roller assembly and has a paper blocking element. The paper blocking element includes a connecting portion with a pair of positioning pillars protruding from the two sides. The positioning pillar is rotatablely connected to the retaining hole of the retaining portion of the supporting frame. The connecting portion extends downwards to form a paper blocking arm. The base has a paper loading base. The sensor is located in the base for sensing whether a paper is loaded on the paper loading base, and has an emitting arm and a receiving arm. The lower portion of the paper blocking arm can be located between the emitting arm and the receiving arm or depart from the emitting arm and the receiving arm.
- As described above, the sensor is in turn-off status when the lower portion of the paper blocking arm is located between the emitting arm and the receiving arm, the sensor is in turn-on status when the lower portion of the paper blocking arm departs from the emitting arm and the receiving arm, the paper feeding device decides whether the paper is provided on the base by the turn-on/turn-off status of the sensor, so an additional obstructer is avoided, compared with the conventional paper feeding device, the structure of the present invention is simple, and it is convenient to assemble.
- The present invention will be apparent to those skilled in the art by reading the following description of a preferred embodiment thereof, with reference to the attached drawings, in which:
-
FIG. 1 is an exploded perspective view of a paper feeding device of the present invention; -
FIG. 2 is a partial enlarged view of the encircled portion labeled 11 shown inFIG. 1 ; -
FIG. 3 is a perspective view of a pickup roller assembly of the present invention; -
FIG. 4 is a perspective view of a blocking element shown inFIG. 1 ; -
FIG. 5 is a perspective view of a sensor of the present invention; -
FIG. 6 is a cross-sectional view showing no paper loaded on a base of the paper feeding device; and -
FIGS. 7-9 are cross-sectional views for describing operations of the paper feeding device of the present invention. - Please refer to
FIG. 1 , the paper feeding device 1 of the present invention includes a supportingframe 10, a pickup roller assembly, abase 50 and apaper blocking unit 60. - Then please refer to
FIG. 1 in combination withFIG. 2 , the supportingframe 10 is placed above thebase 50 and a paper transporting passage 52 (shown inFIG. 6 ) is formed therebetween. A pair of supportingboards 15 are mounted on the inner surface of the supportingframe 10 and areceiving space 14 is formed therebetween. A retainingportion 11 projects from the inner surface of the supportingframe 10. Theretaining portion 11 include a pair of plate-shaped retaining boards 112 parallel to each other, and a restrictingprojection 113 is set therebetween. Aretaining hole 111 is opened in theretaining board 112. Below theretaining portion 11, a pair of connectingportions 13 are mounted on the inner surface of the supportingboards 15. - Referring to
FIG. 1 andFIG. 3 , the pickup roller assembly includes aroller frame 40, apicking roller 20, aconveying roller 30 and abelt 21. Theroller frame 40 has afirst side wall 41 and asecond side wall 42, anactive shaft 43 and anidle shaft 44. One end of theactive shaft 43 is fixed to thefirst side wall 41, the other end of theactive shaft 43 is fixed to and pass through thesecond side wall 42 for receiving a driving force. One end of theidle shaft 44 is fixed to thefirst side wall 41, the other end of theidle shaft 44 is fixed to thesecond side wall 42. Theidle shaft 44 is above theactive shaft 43. A circle shaped restrictingportion 425 projects from the inner surface of thesecond sidewall 42, a sleeve portion (not shown) projects from the inner surface of thesecond sidewall 42 and is above the restrictingportion 425. - The conveying
roller 30 is mounted around theactive shaft 43 and one end of the conveyingroller 30 is circled by the restrictingportion 425. The pickingroller 20 is mounted around theidle shaft 44 and one end of the pickingroller 20 is connected to the sleeve portion. Thebelt 21 is sleeved on both theconveying roller 30 and thepicking roller 20, and impels the conveyingroller 30 and thepicking roller 20 to press against theroller frame 40 for creating a friction between theconveying roller 30 and the restrictingportion 425 and a friction between thepicking roller 20 and the sleeve portion, which drives theroller frame 40 to rotate around theactive shaft 43. - Please refer to
FIG. 1 andFIG. 4 , thepaper blocking unit 60 includes apaper blocking element 61 and aprojection 62. Thepaper blocking element 61 has a connectingportion 611. Two opposite sides of the connectingportion 611 project to form apositioning pillar 612 respectively. The front end of the connectingportion 611 extends upward to form a restrictingarm 613. The restrictingarm 613 leans against the restrictingprojection 113 of the supportingframe 10. The back end of the connectingportion 611 extends downwards to form apaper blocking arm 614 at the left, so anopening 615 is formed at the right of thepaper blocking arm 614. The lower portion of thepaper blocking arm 614 is cut off at the left and thus forms a board-shapedobstructer 616 at the right. Theprojection 62 is cylindrical and projects from the outer surface of thefirst side wall 41 of thepickup roller assembly 20. - Please refer to
FIG. 1 andFIG. 6 , apaper loading base 51 is formed at the front of thebase 50 for loading papers, thepaper loading base 51 extends backwards and defines thepaper transporting passage 52 between the base 50 and the supportingframe 10. Along cavity 53 is lengthwise defined in thebase 50 for receiving theobstructer 616. - Please refer to
FIG. 1 andFIG. 5 , thesensor 70 is electrically mounted on an electrical circuit board, the electrical circuit board is arranged in front of the cavity 53(as shown inFIG. 6 ). Thesensor 70 is approximately U-shaped, including an emittingarm 71 and a receivingarm 72 parallel to the emittingarm 71. A connectingarm 73 connects the emittingarm 71 and the receivingarm 72 and is mounted on the electrical circuit board. The emittingarm 71 radiates light towards the receivingarm 72. The receivingarm 72 receives the light and turns on thesensor 70. 1n this embodiment, thesensor 70 is a light sensor, however, a contact sensor or an electromagnetic sensor can also be used as thesensor 70. - The assemblage of the paper feeding device 1 of the present invention is described hereinafter firstly, the pickup roller assembly is assembled together. Secondly, the pickup roller assembly is received in the receiving
space 14 of the supportingframe 10, the left end of theactive shaft 43 fixed to thefirst side wall 41 is rotatablely connected to one of the connectingportions 13 of the supportingframe 10, the right end of theactive shaft 43 fixed to thesecond side wall 42 passes through the other connectingportion 13 of the supportingframe 10 for connecting with a driving component (not shown). - Then please refer to
FIG. 6 , thepaper blocking unit 60 is placed beside thefirst side wall 41 of the pickup roller assembly, thepositioning pillar 612 of thepaper blocking element 61 is rotatablely connected to the retaininghole 111 of the supportingframe 10, theprojection 62 stops at the connectingportion 611 ofpaper blocking element 61. Lastly, the supportingframe 10 covers on thebase 50, theobstructer 616 of thepaper blocking arm 614 stretches into thecavity 53 of thebase 50, then the paper feeding device 1 of the present invention is assembled. - As shown in
FIG. 6 , when the paper feeding device 1 is in natural state, the pickingroller 20 keeps a certain distance from thepapers 2, thepapers 2 are stopped outside by thepaper blocking arm 614, theobstructer 616 is located between the emittingarm 71 and the receivingarm 72, so the light radiated from the emittingarm 71 is blocked by theobstructer 616, thesensor 70 keeps in a turn-off status. - Please refer to
FIGS. 7-9 , when the paper feeding device 1 picks up thepaper 2, the driving force drives theactive shaft 43 to rotate clockwise, so the pickup roller assembly rotates clockwise around theactive shaft 43. When the paper is provided on thepaper loading base 51, then the pickingroller 20 contacts with thepaper 2. Meanwhile, as the pickup roller assembly moves downwards, theprojection 62 mounted on thefirst side wall 41 of theroller frame 40 also moves downwards and passes through theopening 615 of thepaper blocking element 61, so theprojection 62 loses cooperation with thepaper blocking element 61, thepaper blocking arm 614 rotates clockwise around thepositioning pillar 612 and no longer stops thedocuments 2. When thebelt 21 contacts with thedocument 2 and rotates clockwise, the friction created therebetween picks thedocument 2 into thepaper transporting passage 52, then the front end of thepaper 2 pushes thepaper blocking arm 614 to rotate clockwise and depart from thesensor 70, as a result, the light radiated from the emittingarm 71 is received by the receivingarm 72, thesensor 70 is turned on, and the paper feeding device 1 continues to pick up the paper, during the rotation of thepaper blocking arm 614, theprojection 62 passes through the opening 615 (shown inFIG. 4 ) of thepaper blocking element 61. - Please refer to
FIG. 10 , when the paper feeding device 1 picks up thepaper 2 but no paper is provided on thepaper loading base 51 or the paper is used up, thepaper blocking arm 614 is in natural state under its own weight, and theobstructer 616 is located between the emittingarm 71 and the receivingarm 72, so the light radiated from the emittingarm 71 is blocked by theobstructer 616, thesensor 70 keeps in a turn-off status, as a result, the paper feeding device 1 stops to pick up papers. The driving force drives theactive shaft 43 to rotate anti-clockwise, so the paper pickup assembly rotates anti-clockwise and moves upwards, so the pickingroller 20 departs from thepapers 2, meanwhile, theprojection 62 projected from theroller frame 40 passes through theopening 615 again in a anti-direction (shown inFIG. 4 ) and stops at the connectingportion 611 of thepaper blocking element 61, the restrictingarm 613 stops at the restrictingprojection 113 of supportingframe 10, as shown inFIG. 6 , the paper feeding device 1 returns to natural state. - As described above, the
sensor 70 is in turn-off status when theobstructer 616 of thepaper blocking arm 614 is located between the emittingarm 71 and the receivingarm 72, thesensor 70 is in turn-on status when theobstructer 616 of thepaper blocking arm 614 departs from the emittingarm 71 and the receivingarm 72, the paper feeding device 1 decides whether the paper is provided on thebase 50 by the turn-on/turn-off status of the sensor, so an additional obstructer is avoided. Compared with conventional paper feeding device, the structure of the present invention is simple and convenient to assemble. - The foregoing description of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. Such modifications and variations that may be apparent to those skilled in the art are intended to be included within the scope of this invention as defined by the accompanying claims.
Claims (5)
1. A paper feeding device, comprising:
a supporting frame, having
a pair of opposite supporting boards mounted on the inner surface of the supporting frame;
a retaining portion projecting from the inner surface of the supporting frame, the retaining portion including a pair of retaining boards parallel to each other, a retaining hole being opened in the retaining board;
a pickup roller assembly mounted between the supporting boards, picking up and then transferring papers into the paper feeding device;
a paper blocking unit placed beside the pickup roller assembly, having a paper blocking element, the paper blocking element including a connecting portion with a pair of positioning pillars protruding from the two sides, the positioning pillar rotatablely connected to the retaining hole of the retaining portion of the supporting frame, the connecting portion extending downwards to form a paper blocking arm;
a base having a paper loading base; and
a sensor located in the base for sensing whether a paper is loaded on the paper loading base, having an emitting arm and a receiving arm;
wherein the lower portion of the paper blocking arm can be located between the emitting arm and the receiving arm or depart from the emitting arm and the receiving arm.
2. The paper feeding device as claimed in claim 1 , wherein the front end of the connecting portion of the paper blocking element extends upward to form a restricting arm, a restricting projection is set between the retaining boards, the restricting arm leaning against the restricting projection.
3. The paper feeding device as claimed in claim 1 , wherein the back end of the connecting portion of the paper blocking element extends downward to form the paper blocking arm at the left, so an opening is formed at the right of the paper blocking arm, the pickup roller assembly includes a roller frame, the paper blocking unit further comprises a projection protruding from the sidewall of the roller frame, the projection can stop at the connection portion of the paper blocking arm or pass through the opening of the paper blocking arm.
4. The paper feeding device as claimed in claim 3 , wherein the lower portion of the paper blocking arm is cut off at the left and thus forms a board-shaped obstructer at the right, the obstructer located between or depart from the emitting arm and the receiving arm.
5. The paper feeding device as claimed in claim 1 , wherein the receiving arm is parallel to the emitting arm and is connected by a connecting arm mounted on an electrical circuit board.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/758,586 US20080303204A1 (en) | 2007-06-05 | 2007-06-05 | Paper feeding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/758,586 US20080303204A1 (en) | 2007-06-05 | 2007-06-05 | Paper feeding device |
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US20080303204A1 true US20080303204A1 (en) | 2008-12-11 |
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US11/758,586 Abandoned US20080303204A1 (en) | 2007-06-05 | 2007-06-05 | Paper feeding device |
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US20100244368A1 (en) * | 2009-03-30 | 2010-09-30 | Qisda Corporation | Paper-blocking assembly and paper processing device using the same |
US20120025450A1 (en) * | 2010-08-02 | 2012-02-02 | Kyocera Mita Corporation | Image forming appartus and feed mechanism |
US8752829B1 (en) * | 2013-01-17 | 2014-06-17 | Hewlett-Packard Development Company, L.P. | Rotatable and translatable mechanical flag |
US20160221776A1 (en) * | 2015-01-29 | 2016-08-04 | Brother Kogyo Kabushiki Kaisha | Sheet Conveying Device and Image Reading Device |
US20160236883A1 (en) * | 2015-01-30 | 2016-08-18 | Kyocera Document Solutions Inc. | Paper Feeder, Image Reading Apparatus and Image Forming Apparatus Including the Same |
US10227194B2 (en) * | 2017-03-22 | 2019-03-12 | Brother Kogyo Kabushiki Kaisha | Sheet conveyor and image forming apparatus |
CN109956347A (en) * | 2017-12-25 | 2019-07-02 | 佳能株式会社 | Sheet conveyance apparatus, image-reading device and imaging device |
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