CN108900731B - Paper feeding and feeding structure of scanner - Google Patents
Paper feeding and feeding structure of scanner Download PDFInfo
- Publication number
- CN108900731B CN108900731B CN201810763971.XA CN201810763971A CN108900731B CN 108900731 B CN108900731 B CN 108900731B CN 201810763971 A CN201810763971 A CN 201810763971A CN 108900731 B CN108900731 B CN 108900731B
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- paper
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- wheel
- paper feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
Abstract
The invention discloses a paper feeding and feeding structure of a scanner, which comprises a paper twisting support and a paper feeding support, wherein a paper twisting motor is arranged on the paper twisting support, the paper twisting motor drives a paper picking and feeding transmission shaft to rotate, a paper feeding motor is arranged on the paper feeding support, the paper feeding motor drives a first paper feeding roller to rotate, the first paper feeding roller is meshed with a reduction gear set, the reduction gear set is connected with a paper feeding rotating shaft through a gear or a transmission rod, a first one-way bearing is arranged in the paper feeding rotating shaft, the paper feeding rotating shaft drives a paper separating wheel to rotate, and a paper aligning sheet is arranged on the paper feeding support; the paper picking and feeding transmission shaft is connected with a paper picking and feeding rotation shaft through a second one-way bearing, a paper picking and feeding wheel corresponding to the paper separating wheel is arranged on the paper picking and feeding rotation shaft, a paper aligning piece support is arranged on the paper twisting support, a groove used for clamping the paper aligning piece is arranged on the paper aligning piece support, and a lifting mechanism used for lifting the paper aligning piece is arranged on the paper picking and feeding transmission shaft.
Description
Technical Field
The invention relates to the field of scanners, in particular to a paper feeding and feeding structure of a scanner.
Background
Scanners are commonly used in computer peripheral devices by capturing images and converting them into digitized input devices that a computer can display, edit, store, and output. In order to improve the working efficiency of the scanner, the scanning paper feeding speed of the scanner is generally increased greatly, but an excessively fast scanning speed causes that a plurality of papers are fed once when the papers are fed, so that scanned files are careless and careless, and the work of the scanner is greatly influenced.
In the prior art, a torque limiter is arranged on a paper feeding roller to control the forward rotation and the reverse rotation of a paper separating wheel, when a plurality of sheets of paper enter a scanner, the friction force between the paper separating wheel and the upper surface of the paper is greater than the friction force between a paper picking and feeding wheel and the lower surface of the paper, so that the torque limiter and a paper feeding shaft slip, the paper feeding wheel rotates along the original direction, and the paper separating wheel rotates along the reverse direction. However, in the structure, the shafts of the paper separating wheel and the paper feeding wheel are synchronously driven with the paper feeding motor, and the paper separating wheel and the paper feeding wheel rotate at high speed together, so that in the process of fast scanning, redundant paper cannot be backed up every time, and the scanning speed is reduced.
Then, when the paper enters the scanner, an infrared sensor is mostly used to detect whether the paper is skewed or not, but this arrangement can only detect whether the paper is skewed or not, and cannot correct the skew, which may reduce the scanning speed of the whole scanner.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the high-speed scanner paper feeding and feeding structure is provided, paper placed in a scanner can be horizontally positioned, and the situation that the paper is not inclined is guaranteed; meanwhile, paper to be scanned is fed from the bottom, and only one paper is fed each time.
The technical scheme adopted by the invention for solving the problems is as follows: a paper feeding and feeding structure of a scanner comprises a paper twisting support and a paper feeding support, wherein a paper twisting motor is arranged on the paper twisting support, the paper twisting motor is in transmission connection with a paper picking and feeding transmission shaft, a paper feeding motor is arranged on the paper feeding support, the paper feeding motor is in transmission connection with a first paper feeding roller, the first paper feeding roller is in meshing connection with a reduction gear set, the reduction gear set is connected with a paper feeding rotating shaft sleeve through a gear or a transmission rod, a torque limiter is arranged in the paper feeding rotating shaft sleeve, the paper feeding rotating shaft sleeve drives a paper separating wheel to rotate, and a paper aligning sheet is arranged on the paper feeding support;
the paper picking and feeding transmission shaft is connected with a paper picking and feeding rotation shaft through a second one-way bearing, a paper picking and feeding wheel corresponding to the paper separating wheel is arranged on the paper picking and feeding rotation shaft, a paper aligning sheet support is arranged on the paper twisting support, a groove used for clamping the paper aligning sheet is arranged on the paper aligning sheet support, and a lifting mechanism used for lifting the paper aligning sheet is arranged on the paper picking and feeding transmission shaft;
the first paper feeding roller, the reduction gear set and the transmission mechanism are all arranged on the paper feeding support, and the paper pickup and feeding transmission shaft and the paper pickup and feeding rotation shaft are all arranged on the paper twisting support.
Preferably, the lifting mechanism is fixed on the paper twisting support and comprises a transmission gear, a connecting rod and a swing rod, a third one-way bearing is arranged in the transmission gear and arranged on a paper pickup and feeding transmission shaft, the transmission gear is connected with the connecting rod through a gear set, the connecting rod is connected with the swing rod, and the swing rod is arranged below the paper aligning sheet. Like this, pick up the epaxial drive gear of paper feed and drive the pendulum rod through the connecting rod and play the lifting effect, the one-way bearing of third that sets up simultaneously can guarantee to carry out the lifting from one direction only, and another direction can skid, and then can not rotate the pendulum rod and lift the paper and align the piece support.
Preferably, the paper twisting support comprises a cover plate of a paper picking and feeding wheel, and one end of the paper aligning sheet support is movably connected with the cover plate of the paper picking and feeding wheel. Therefore, the paper aligning piece can be movably arranged on the paper rubbing support, and the paper aligning piece can be conveniently clamped and disconnected.
Preferably, the paper feeding support comprises a paper dividing wheel cover plate, a paper pressing wheel support is arranged in the paper dividing wheel cover plate, and the paper aligning piece is arranged on the paper pressing wheel support through a clamp spring. Like this, the dynamics of jump ring is very little, only plays and aligns the piece with the paper and reset the effect, and when the paper feed, the paper aligns the power that the piece is greater than the jump ring to the paper, and the nature is aligned the piece with the paper and is lifted up around the jump ring position, guarantees inside the entering scanner that the paper can be smooth.
Preferably, but press a swing joint paper detection piece on the paper wheel support, the paper detects the piece and includes first swing arm and second swing arm, first swing arm sets up at branch paper wheel and picks up the paper feed mouth between the paper feed wheel, the second swing arm sets up on the paper feed support in the paper alignment piece outside, still be equipped with on the paper feed support one with second swing arm complex paper detection sensor. Therefore, when paper enters the scanner, the paper detection sheet is jacked up, and whether the paper enters the scanner or not is judged through the paper detection sensor, so that a photoelectric scanning program is started to scan the paper.
Preferably, the paper feeding rotating shaft sleeve comprises a first rotating shaft sleeve and a second rotating shaft sleeve connected with the first rotating shaft sleeve, the speed reduction gear set is connected with the first rotating shaft sleeve through a gear or a transmission rod, a paper separating wheel is fixedly arranged on the second rotating shaft sleeve, and a torque limiter is arranged between the first rotating shaft sleeve and the second rotating shaft sleeve. Therefore, when only one piece of paper exists between the paper separating wheel and the paper picking and feeding wheel or no paper exists, the paper separating wheel is driven by the paper picking and feeding wheel to rotate, and the friction force between the paper separating wheel and the paper picking and feeding wheel is greater than the force of the torque limiter; when a plurality of sheets of paper are fed, the friction force between the sheets of paper is small, the paper separating wheel can reverse to drive the redundant sheets of paper to come out, and the friction force between the paper separating wheel and the paper picking and feeding wheel is smaller than the force of the torque limiter. The torque limiter is used primarily to balance the forces.
Preferably, the paper feeding motor further drives a second paper feeding roller to rotate, and the second paper feeding roller is movably arranged on the paper feeding support. Thus, the second sheet feeding roller can guide the sheet fed into the scanner.
Preferably, a plurality of paper feeding wheel rubber sleeves are arranged on the first paper feeding roller and the second paper feeding roller, driven wheels are correspondingly arranged below the paper feeding wheel rubber sleeves, the driven wheels are connected through driven wheel fixing shafts, and the driven wheel fixing shafts are fixed on the paper feeding support through springs or supporting frames. Therefore, the paper can smoothly enter a rear scanning structure in the guiding process through the matching use of the paper feeding wheel rubber sleeve and the driven wheel, and meanwhile, the paper is not bent.
Preferably, the paper feeding support is provided with a pressing piece above the side edge between the first paper feeding roller and the second paper feeding roller, and the paper feeding motor is connected with the first paper feeding roller, the pressing piece and the second paper feeding roller through a belt. Thus, the paper feeding motor can be connected with the first paper feeding roller and the second paper feeding roller through the pressing piece in a better and tight mode.
Compared with the prior art, the invention has the advantages that:
(1) the paper to be scanned is fed from the bottom, so that a plurality of pieces of paper are scanned and then are arranged according to the original paper arrangement sequence, and the paper is convenient to complete;
(2) the paper feeding rotating shaft sleeve is in transmission connection with the reduction gear set, so that the paper separating wheel on the paper feeding rotating shaft sleeve is enabled to rotate reversely at a low speed; a torque limiter is further arranged in the paper feeding rotating shaft sleeve, when two pieces of paper are fed, the friction force between the paper separating wheel and the paper is larger than the friction force between the paper and the paper, and the friction force between the paper separating wheel and the paper picking and feeding wheel is smaller than the force of the torque limiter, so that the paper separating wheel can be driven by the paper feeding rotating shaft sleeve to rotate reversely, and further, redundant paper can be reversely withdrawn from the scanner, and only one piece of paper is fed; when a piece of paper is fed or no paper is fed, the paper separating wheel rotates at a low speed, the traction force is small, the friction force between the paper separating wheel and the paper picking and feeding wheel is larger than the force of the torque limiter, and the paper separating wheel is driven by the paper picking and feeding wheel to rotate together;
(3) the paper aligning device is arranged at a paper feeding port of the paper, the lifting mechanism lifts the paper aligning sheet support to enable the paper aligning sheet support to be matched with the paper aligning sheets, and the paper is aligned with the two paper aligning sheets, so that the paper entering scanning each time is not inclined, and the scanning quality is guaranteed; when scanning, the lifting mechanism does not lift the paper aligning sheet support, so that the paper aligning sheet support cannot be matched with the paper aligning sheet, the aligning device is removed, meanwhile, the force of the paper entering the scanner and acting on the paper aligning sheet is greater than the force of the clamp spring on the paper aligning sheet, the paper aligning sheet is bent, and the paper can be guaranteed to smoothly enter the scanner for scanning.
Drawings
FIG. 1 is a schematic view of a scanner paper feed port according to the present invention;
FIG. 2 is a schematic diagram of a paper feeding and feeding structure of a scanner according to the present invention;
FIG. 3 is an inside elevation view of a paper feeding and feeding structure of a scanner according to the present invention;
FIG. 4 is an enlarged view of FIG. 3B of the present invention;
FIG. 5 is an enlarged view of FIG. 3 at C according to the present invention;
FIG. 6 is a schematic rear view of the paper feeding and feeding structure of the scanner according to the present invention;
FIG. 7 is an enlarged view of FIG. 6 showing the structure of the present invention;
FIG. 8 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 9 is a schematic view of a sheet alignment member according to the present invention.
The reference numbers in the figures illustrate:
1. the paper pickup and feeding device comprises a paper pickup bracket 11, a paper pickup and feeding motor 12, a paper pickup and feeding transmission shaft 13, a paper pickup and feeding rotating shaft 14, a paper pickup and feeding wheel 15, a paper alignment sheet bracket 151, a groove 16 and a cover plate of the paper pickup and feeding wheel;
2. a paper feeding bracket 21, a paper feeding motor 22, a first paper feeding roller 221, a paper feeding wheel rubber sleeve 222, a driven wheel 23, a reduction gear set 24, a paper feeding rotating shaft sleeve 241, a torque limiter 242, a first rotating shaft sleeve 243, a second rotating shaft sleeve 25, a paper separating wheel 26, a paper separating wheel cover plate 261, a paper pressing wheel bracket 262, a clamp spring 263, a paper aligning sheet 27, a paper detecting sheet 28, a paper detecting sensor 29 and a second paper feeding roller;
31. the transmission gear 311, the third one-way bearing 32, the connecting rod 33, the swing rod 4 and the pressing piece.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1-3, the present embodiment relates to a paper feeding and feeding structure of a scanner, which includes a paper twisting frame 1 and a paper feeding frame 2, wherein a paper twisting motor 11 is disposed on the paper twisting frame 1, the paper twisting motor 11 drives a paper picking and feeding transmission shaft 12 to rotate, a paper feeding motor 21 is disposed on the paper feeding frame 2, and the paper feeding motor 21 drives a first paper feeding roller 22 to rotate.
As shown in fig. 6-7, in the present embodiment, the first paper feeding roller 22 is engaged with a reduction gear set 23, the reduction gear set 23 is connected with a paper feeding rotating shaft sleeve 24 through a gear or a transmission rod, a torque limiter 241 is disposed in the paper feeding rotating shaft sleeve 24, the paper feeding rotating shaft sleeve 24 drives the paper separating wheel 25 to rotate, and a paper aligning piece 263 is disposed on the paper feeding bracket 2.
The reduction gear set 23 can be implemented by four reduction gears, and the reduction ratio of each gear is 2-2.5. Thus, the fast rotation speed transmitted from the paper feeding motor 21 can be greatly reduced, and the rotation speed transmitted to the paper separating wheel 25 is relatively small. The reduction gear set 23 can be directly connected with the paper feeding rotary shaft sleeve 24 through other gears; the reduction gear set 23 can also be directly connected with the paper feeding rotary shaft sleeve 24; it may also be connected to the feed rotating sleeve 24 via a transmission rod. The torque limiter 241 arranged in the paper feeding rotating shaft sleeve 24 can ensure that the paper feeding rotating shaft sleeve can only rotate around one direction to drive the paper separating wheel 25 to rotate, and can not drive the paper separating wheel 25 to rotate in the other direction.
Referring to fig. 3-4, the paper-picking and feeding transmission shaft 12 is connected to a paper-picking and feeding rotation shaft 13 through a second one-way bearing, and the paper-picking and feeding rotation shaft 13 is provided with a paper-picking and feeding wheel 14 corresponding to the paper-separating wheel 25, i.e. the paper-picking and feeding rotation shaft 13 is provided with a second one-way bearing, or a second one-way bearing is provided between the paper-picking and feeding wheel 14 and the paper-picking and feeding rotation shaft 13. The paper twisting support 1 is provided with a paper aligning piece support 15, the paper aligning piece support 15 is provided with a groove 151 used for clamping the paper aligning piece 263, and the paper picking and feeding transmission shaft 13 is provided with a lifting mechanism used for lifting the paper aligning piece 263.
The second one-way bearing also has the same function of driving the paper pick-up and feed wheel 14 to rotate in one direction only. Preferably, the paper separating wheel 25 and the paper pick-up and feeding wheel 14 are sleeved with a rubber sleeve, and the rubber sleeves of the two are provided with friction grooves to increase friction force, wherein one friction groove is arranged in a manner parallel to the paper pick-up and feeding rotating shaft 13, and the other friction groove is arranged in a manner perpendicular to the paper pick-up and feeding rotating shaft 13. Meanwhile, the outer diameter of the paper picking and feeding wheel 14 is increased, for example, the current diameter is 46mm, the paper picking and feeding wheel 14 has the functions of picking paper and feeding paper, and compared with the traditional paper separating structure, a group of wheels is omitted. The traditional paper separating structure is generally provided with a paper picking wheel and a paper feeding wheel respectively, and when the volume of the whole device is increased, the structure is relatively complex.
The pickup motor 11 drives the pickup and feeding transmission shaft 13 to rotate, and the pickup and feeding transmission shaft 13 drives the lifting mechanism to lift the paper alignment sheet support 15, so that the groove 151 on the paper alignment sheet support 15 is clamped with the paper alignment sheet 263 to achieve a certain stable state. In the process, the paper twisting motor 11 can adopt a stepping motor, so that the rotating angle of the paper pickup and feeding transmission shaft 13 can be controlled, and the lifting height of the lifting mechanism is further controlled, so that the lifting mechanism cannot be excessively lifted, and the whole device is damaged.
In the present embodiment, the first paper feeding roller 22, the reduction gear set 23 and the transmission mechanism are disposed on the paper feeding bracket 2, and the pick-up paper feeding transmission shaft 12 and the pick-up paper feeding rotation shaft 13 are disposed on the paper twisting bracket 1.
Referring to fig. 3 and 5, in an actual use process, the lifting mechanism is fixed on the paper twisting bracket 1, and the lifting mechanism includes a transmission gear 31, a connecting rod 32 and a swing rod 33. The transmission gear 31 is internally provided with a third one-way bearing 311, and the third one-way bearing 311 is arranged on the paper pick-up and feeding transmission shaft 12, so that the transmission gear can only rotate around one direction. The transmission gear 31 is connected with the connecting rod 32 through a gear set, the connecting rod 32 is connected with the swing rod 33, and the swing rod 33 is arranged below the paper aligning sheet 263.
The working principle of the lifting mechanism is as follows: the paper twisting motor 11 rotates anticlockwise to drive the paper pickup and feeding transmission shaft 12 to rotate anticlockwise, at the moment, the third one-way bearing 311 just can clamp the transmission gear 31 to enable the transmission gear 31 to rotate anticlockwise, the connection rod 32 is further driven to rotate clockwise through the gear set, the connection rod 32 rotates the swing rod 33 to enable one end of the swing rod 33 to be lifted, the lifting height of the swing rod 33 is controlled through rotation of the paper twisting motor 11 by a certain angle to prevent excessive lifting, and after the lifting is finished, the motor is locked to be not rotated, so that all gears are not rotated; if the paper twisting motor 11 rotates clockwise, the third one-way bearing 311 cannot hold the transmission gear 31 tightly, so the swing link 33 is not powered by the motor, and a tension spring is arranged below the swing link 33 to reset the swing link 33.
The lifting mechanism can also be set to be a motor and a telescopic upright post, and the paper alignment sheet support 15 is lifted through the telescopic upright post.
Referring to fig. 1-5, in the present embodiment, the pickup frame 1 includes a pickup and feeding wheel cover 16, and one end of the paper alignment sheet frame 15 is movably connected to the pickup and feeding wheel cover 16. Thus, when the lifting mechanism does not act on the sheet aligning support 15, one end of the sheet aligning support 15 naturally droops due to gravity; when the lifting mechanism acts, the paper aligning piece support 15 is lifted to the position clamped with the paper aligning pieces 263, so that the whole paper aligning device can reach a stable clamping state, the front end of each paper aligns the two paper aligning pieces 263 in parallel and level, and then each paper is not inclined.
The paper feeding bracket 2 includes a paper dividing wheel cover plate 26, a paper pressing wheel bracket 261 is provided in the paper dividing wheel cover plate 26, and a paper aligning piece 263 is provided on the paper pressing wheel bracket 261 through a snap spring 262. The force of the snap spring 262 is small, and only the paper aligning piece 263 can be reset towards the bottom. If the clamping state of the paper aligning device is released, the lower end of the paper aligning piece 263 is suspended, at this time, paper enters the scanner, the force of the paper on the paper aligning piece 263 is greater than the force of the snap spring 262 on the paper aligning piece 263, so that the paper jacks up the paper aligning piece 263, and paper feeding is facilitated.
As shown in fig. 6 to 7, the paper feeding rotary sleeve 24 includes a first rotary sleeve 242 and a second rotary sleeve 243 connected thereto, the speed reduction gear set 23 is connected to the first rotary sleeve 242 through a gear or a transmission rod, the second rotary sleeve 243 drives the paper separating wheel 25 to rotate, and a torque limiter 241 is disposed between the first rotary sleeve 242 and the second rotary sleeve 243. Thus, when there is only one paper or no paper between the paper separating wheel 25 and the paper picking and feeding wheel 14, the paper separating wheel 25 is driven by the paper picking and feeding wheel 14 to rotate, and the friction force between the paper separating wheel 25 and the paper picking and feeding wheel 14 is greater than the force of the torque limiter 241; when a plurality of sheets of paper are fed, the friction force between the sheets of paper is small, the paper separating wheel 25 can reverse to drive the redundant sheets of paper to be discharged, and the friction force between the paper separating wheel 25 and the paper picking and feeding wheel 14 is smaller than the force of the torque limiter 241. The torque limiter 241 is primarily used to balance the forces.
Preferably, the paper feeding motor 21 also drives the second paper feeding roller 29 to rotate, and the second paper feeding roller 29 is movably disposed on the paper feeding bracket 2. Thus, the second sheet feeding roller 29 can guide the sheet fed into the scanner. The first paper feeding roller 22 and the second paper feeding roller 29 are respectively provided with a plurality of paper feeding wheel rubber sleeves 221, driven wheels 222 are correspondingly arranged below the paper feeding wheel rubber sleeves 221, the driven wheels 222 are connected through driven wheel fixed shafts, and the driven wheel fixed shafts are fixed on the paper feeding support 2 through springs or support frames. Thus, the paper can smoothly enter the following scanning structure in the guiding process by the matching use of the paper feeding wheel rubber sleeve 221 and the driven wheel 222, and the paper is not bent.
As shown in fig. 1, 8 and 9, a paper detecting piece 27 is movably connected to the paper pressing wheel support 261, and the paper detecting piece includes a first swing arm and a second swing arm, and the first swing arm and the second swing arm are connected by a cross bar. The first swing arm is arranged at a paper feeding port between the paper separating wheel 25 and the paper picking and feeding wheel 14, the second swing arm is arranged on the paper feeding support 2 outside the paper aligning sheet 263, and the paper feeding support 2 is further provided with a paper detection sensor 28 matched with the second swing arm. Like this, the paper is when getting into the scanner in, also can be with first swing arm jack-up, and then makes second swing arm jack-up to trigger paper and detect the sensor, send a paper feed signal for terminal control ware.
As shown in fig. 3, it is further preferable that the sheet feeding carriage 2 is provided with a pressing member 4 above a side edge between the first sheet feeding roller 22 and the second sheet feeding roller 29, and the sheet feeding motor 21 connects the first sheet feeding roller 22, the pressing member 4, and the second sheet feeding roller 29 via a belt. In this way, the paper feed motor 21 can be connected to the first paper feed roller 22 and the second paper feed roller 29 more closely by the pressing member 4.
The working principle is as follows:
(1) the paper twisting motor 11 rotates clockwise first to drive the paper pick-up and feeding transmission shaft 12 to rotate, and because the transmission gear 31 is internally provided with the third one-way bearing 311, the paper pick-up and feeding transmission shaft 12 cannot drive the transmission gear 31 to rotate, so that the swing rod 33 is not powered by the motor, and the swing rod 33 is reset by the tension spring below; meanwhile, under the action of the second one-way bearing, the paper pick-up and feed transmission shaft 12 drives the paper pick-up and feed rotation shaft 13 to rotate, and the paper pick-up and feed wheel 14 rotates.
(2) Fixing the paper stacking position: the pickup motor 11 rotates counterclockwise to drive the pickup paper feeding transmission shaft 12 to rotate, the pickup paper feeding transmission shaft 12 embraces the transmission gear 31 through the third one-way bearing 311 to rotate, and then drives the connecting rod 32 to rotate through the gear set, the connecting rod 32 drives the swing rod 33 for lifting the paper aligning sheet support 15, so that the paper aligning sheet support is clamped with the paper aligning sheet 263, the paper stacking position is fixed, and the paper is placed at this time, so that the front end of the paper is aligned with the paper aligning sheet 263. Meanwhile, due to the action of the second one-way bearing, the paper pick-up and feed transmission shaft 12 slips with the paper pick-up and feed rotation shaft 13, and the paper pick-up and feed rotation shaft 13 cannot be driven to rotate.
(3) The working state is as follows: the paper twisting motor 11 rotates clockwise to drive the paper picking and feeding wheel 14 to rotate clockwise; the paper feeding motor 21 rotates anticlockwise at a high speed, the first rotating shaft sleeve 242 drives the second rotating shaft sleeve 243 to rotate through the torque limiter 241 through the reduction gear set 23, and then the paper separating wheel 25 rotates reversely at a low speed (rotates clockwise);
when a plurality of sheets of paper are fed, the friction force between the sheets of paper is small, the paper separating wheel 25 can reverse to drive the redundant sheets of paper to come out, and at the moment:
(31) only one paper or no paper state: the rotation speed of the paper pickup and feeding wheel 14 is higher, the rotation speed of the paper separating wheel 25 is lower, and the two wheels rotate clockwise; however, because the second rotating shaft sleeve 243 where the paper separating wheel 25 is located has the relationship of the torque limiter 241, the friction force between the paper separating wheel 25 and the paper picking and feeding wheel 14 is greater than the force of the torque limiter 241, the paper separating wheel 25 will rotate along with the paper picking and feeding wheel 14, that is, the paper picking and feeding wheel 14 rotates clockwise, and the paper separating wheel 25 rotates counterclockwise; if a sheet is placed, the sheet entering the scanner will touch the sheet detection plate 27, and the sheet detection sensor 28 will detect the sheet signal.
(32) Entering a state of multiple sheets of paper: the friction force between the paper separating wheel 25 and the paper is larger than that between the paper and the paper, and meanwhile, the friction force between the paper separating wheel 25 and the paper picking and feeding wheel 14 is smaller than the force of the torque limiter 241, so that the paper separating wheel 25 can be driven by the paper feeding rotating shaft sleeve 24 to be reversed, and further the redundant paper is reversed to exit from the scanner, the paper picking and feeding wheel 14 rotates clockwise to drive the paper to enter into the scanner, the paper separating wheel 25 rotates clockwise to drive the paper to be reversed to exit from the scanner, and only one paper is fed into the scanner at each time.
The invention has the beneficial effects that: the scanned paper is fed from the bottom, so that the paper ordering after the scanning is finished is ensured to be in the original order; the paper separating wheel can ensure that only one paper is fed in each time through the speed reducing gear set and the torque limiter; through the cooperation of the paper aligning sheet and the paper aligning bracket, the front end of each paper is ensured to be smooth and not to be inclined before the paper enters the scanner.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a paper feed structure of scanner, includes and rubs paper support (1) and paper feed support (2) with the hands, be equipped with on the support of rubbing with the hands (1) and rub paper motor (11) with the hands, it is connected with a paper feed transmission shaft (12) transmission to rub paper motor (11) with the hands, be equipped with paper feed motor (21) on paper feed support (2), paper feed motor (21) are connected its characterized in that with first paper feed roller (22) transmission:
the first paper feeding roller (22) is meshed with a reduction gear set (23), the reduction gear set (23) is connected with a paper feeding rotating shaft sleeve (24) through a gear or a transmission rod, a torque limiter (241) is arranged in the paper feeding rotating shaft sleeve (24), the paper feeding rotating shaft sleeve (24) drives a paper separating wheel (25) to rotate, and a paper aligning sheet (263) is arranged on the paper feeding support (2);
pick up paper feed transmission shaft (12) and connect one through the one-way bearing of second and pick up paper feed axis of rotation (13), pick up and be provided with one on paper feed axis of rotation (13) and divide paper wheel (25) to correspond pick up paper feed wheel (14), it aligns piece support (15) to be equipped with a paper on paper support (1) to rub with the hands, be equipped with a recess (151) that are used for joint paper to align piece (263) on paper alignment piece support (15), it is equipped with a lifting mechanism that is used for lifting paper alignment piece (263) on paper feed transmission shaft (13) to pick up.
2. The paper feeding and feeding structure of scanner of claim 1, wherein: the lifting mechanism is fixed on the paper twisting support (1), the lifting mechanism comprises a transmission gear (31), a connecting rod (32) and a swing rod (33), a third one-way bearing (311) is arranged in the transmission gear (31), the third one-way bearing (311) is arranged on a paper picking and feeding transmission shaft (12), the transmission gear (31) is connected with the connecting rod (32) through a gear set, the connecting rod (32) is connected with the swing rod (33), and the swing rod (33) is arranged below the paper aligning sheet (263).
3. The paper feeding and feeding structure of scanner of claim 1, wherein: the paper twisting support (1) comprises a paper picking and feeding wheel cover plate (16), and one end of the paper aligning sheet support (15) is movably connected with the paper picking and feeding wheel cover plate (16).
4. The paper feeding and feeding structure of scanner of claim 1, wherein: the paper feeding support (2) comprises a paper dividing wheel cover plate (26), a paper pressing wheel support (261) is arranged in the paper dividing wheel cover plate (26), and the paper aligning piece (263) is arranged on the paper pressing wheel support (261) through a clamping spring (262).
5. The paper feeding and feeding structure of scanner of claim 4, wherein: but press a swing joint paper to detect piece (27) on paper wheel support (261), paper detects piece (27) and includes first swing arm and second swing arm, first swing arm sets up at branch paper wheel (25) and picks up the paper feed mouth between paper feed wheel (14), the second swing arm sets up on paper feed support (2) in the paper alignment piece (263) outside, still be equipped with on paper feed support (2) one with second swing arm complex paper detection sensor (28).
6. The paper feeding and feeding structure of scanner of claim 1, wherein: the paper feeding rotating shaft sleeve (24) comprises a first rotating shaft sleeve (242) and a second rotating shaft sleeve (243) connected with the first rotating shaft sleeve, the speed reducing gear set (23) is connected with the first rotating shaft sleeve (242) through a gear or a transmission rod, a paper separating wheel (25) is fixedly arranged on the second rotating shaft sleeve (243), and a torque limiter (241) is arranged between the first rotating shaft sleeve (242) and the second rotating shaft sleeve (243).
7. The paper feeding and feeding structure of scanner of claim 1, wherein: the paper feeding motor (21) further drives a second paper feeding roller (29) to rotate, and the second paper feeding roller (29) is movably arranged on the paper feeding support (2).
8. The paper feeding and feeding structure of scanner of claim 7, wherein: all be equipped with a plurality of paper feed wheel gum cover (221), it is a plurality of on first paper feed roller (22) and second paper feed roller (29) the correspondence of paper feed wheel gum cover (221) below is equipped with driven wheel (222), through driven wheel fixed axle connection between a plurality of driven wheel (222), the driven wheel fixed axle is fixed in on paper feed support (2) through spring or support frame.
9. The paper feeding and feeding structure of scanner of claim 1, wherein: paper advance support (2) are equipped with one above the side between first paper feed roller (22) and second paper feed roller (29) and press tightly (4), paper feed motor (21) are through belt connection first paper feed roller (22), are pressed tightly (4) and second paper feed roller (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763971.XA CN108900731B (en) | 2018-07-12 | 2018-07-12 | Paper feeding and feeding structure of scanner |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4429333A (en) * | 1982-03-08 | 1984-01-31 | The Mead Corporation | Document scanning system |
| CN1958417A (en) * | 2005-11-04 | 2007-05-09 | 光宝科技股份有限公司 | Automatic sheet feed mechanism |
| CN104709738A (en) * | 2015-01-19 | 2015-06-17 | 哈尔滨市君诚信电子有限公司 | Paper separating mechanism of paper feed bin |
| CN205204331U (en) * | 2015-11-13 | 2016-05-04 | 光宝电子(广州)有限公司 | Image inputoutput unit , branch paper mechanism and reduce roll group |
| CN106851042A (en) * | 2017-01-23 | 2017-06-13 | 宁波华高信息科技有限公司 | A kind of scanner |
| WO2017184162A1 (en) * | 2016-04-22 | 2017-10-26 | Hewlett-Packard Development Company, L.P. | Imaging devices |
-
2018
- 2018-07-12 CN CN201810763971.XA patent/CN108900731B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4429333A (en) * | 1982-03-08 | 1984-01-31 | The Mead Corporation | Document scanning system |
| CN1958417A (en) * | 2005-11-04 | 2007-05-09 | 光宝科技股份有限公司 | Automatic sheet feed mechanism |
| CN104709738A (en) * | 2015-01-19 | 2015-06-17 | 哈尔滨市君诚信电子有限公司 | Paper separating mechanism of paper feed bin |
| CN205204331U (en) * | 2015-11-13 | 2016-05-04 | 光宝电子(广州)有限公司 | Image inputoutput unit , branch paper mechanism and reduce roll group |
| WO2017184162A1 (en) * | 2016-04-22 | 2017-10-26 | Hewlett-Packard Development Company, L.P. | Imaging devices |
| CN106851042A (en) * | 2017-01-23 | 2017-06-13 | 宁波华高信息科技有限公司 | A kind of scanner |
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| CN108900731A (en) | 2018-11-27 |
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Denomination of invention: A paper feeding structure of scanner Effective date of registration: 20220125 Granted publication date: 20191231 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO HUAGAO INFORMATION TECHNOLOGY CO.,LTD. Registration number: Y2022330000164 |
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Date of cancellation: 20230511 Granted publication date: 20191231 Pledgee: Ningbo Tianjin Enterprise Service Co.,Ltd. Pledgor: NINGBO HUAGAO INFORMATION TECHNOLOGY CO.,LTD. Registration number: Y2022330000164 |