CN104228395A - Automatic page turning machine - Google Patents

Automatic page turning machine Download PDF

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Publication number
CN104228395A
CN104228395A CN201410485016.6A CN201410485016A CN104228395A CN 104228395 A CN104228395 A CN 104228395A CN 201410485016 A CN201410485016 A CN 201410485016A CN 104228395 A CN104228395 A CN 104228395A
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China
Prior art keywords
book
page turning
upper plate
automatic
turning machine
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Granted
Application number
CN201410485016.6A
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Chinese (zh)
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CN104228395B (en
Inventor
袁文
张云玲
张秋军
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Linyi Gaoxin Automobile Rental Service Co ltd
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Nanjing Institute of Industry Technology
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Priority to CN201410485016.6A priority Critical patent/CN104228395B/en
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Abstract

The invention discloses an automatic page turning machine, which comprises an upper plate, a bottom plate, a book pressing device, a paper sucking device, a page turning device, a transmission mechanism and a support, wherein the upper plate and the bottom plate are connected by using bolts; the transmission mechanism is arranged between the two plates, and the power of the transmission mechanism is from a stepping motor; the book pressing device is arranged on the upper plate, and a left clamping mechanism and a right clamping mechanism are opened in sequence by utilizing a cam mechanism; a sucker is adopted by the automatic page turning machine disclosed by the invention to generate negative pressure to suck paper; the page turning device mainly consists of a page turning rod and a pair of cone gears. The automatic page turning machine is controlled by utilizing a single-chip microcomputer, and can run according to a preset program after a start button is pressed; the page turning efficiency is higher; the page turning speed is adjustable in the program; the oblique arrangement angle of the page turning machine can be adjusted by the bottom plate and the support; the automatic page turning machine has the characteristics of being simple in structure, light in weight, convenient to carry, and the like, and is suitable for being popularized to the public.

Description

A kind of automatic book page turning machine
Technical field
The present invention relates to a kind of automatic book page turning machine.
Background technology
Today that electron reading is propagated its belief on a large scale, still have many people to have a preference for paper book, custom is difficult to change, especially when you do not want to change.Along with the progress in epoch and the development of science and technology, people are not only to the concern of disadvantaged group the material life enriching them, and are deep into the spiritual demand how meeting them.For the friends of both hands deformity, want reading relatively difficulty.This is because they cannot use handspring book as normal person.Although newspapers and periodicals report once had disabled friend association's pin of going through many hardships to turn over book, book from eyes apart from too far away, be unfavorable for reading.Although they also can select the mouse reading electronic book with computer and speciality, but computer can cause certain injury to eyes faced by long-time, and not too economical, equally, also become a very inconvenient thing for turning over the so simple action of book the bound wounded of both hands.So automatic book page turning machine should need and give birth to.
According to data-searching, now external automatic book page turning machine patent is few in number, most typically will count BOOK TIME 5000 automatic book page turning machine.This book leaf turner has automatic control function, size and 21 cun of television sets similar, be applicable to browsing of the books of all size.But because it is bulky, heavier-weight, carries inconvenience, and price is up to 3000 U.S. dollars, be senior luxury goods, be beyond affordability for most of friend disabled person.
Utility model patent of invention (application number: CN201310270816) is a kind of automatic book page turning machine, and automatic turning page scanner comprises: frame; Be located at the book plate of the upper surface of described frame; Automatic page turning mechanism, book pressing mechanism and sweep mechanism, described automatic page turning mechanism can realize the automatic page turning to books, and described book pressing mechanism, for books being pressed on described book plate, avoids the paper of books to turn back; Described sweep mechanism is used for automatically carrying out scanning to books and preserves.Automatic turning page scanner of the present invention, automatic turning page is realized by book pressing mechanism and automatic page turning mechanism, by sweep mechanism, the content scanning in book is preserved again, the transformation of entity book to e-book can be realized, be convenient to Internet communication, and there is larger adjustability, can realize scanning the automatic page turning of the books of difformity, different-thickness and different size, turn over book and scanning process automatically quick, it is adjustable to turn over book speed.But its volume is comparatively large, and heavier-weight, carries inconvenience and use multiple motor cost higher.
Utility model patent of invention (application number: CN201220606399) automatic book page turning machine, wherein support is provided with guide post, folder book box is placed on support and is connected with guide post, folder book box is provided with pressing board, is provided with motor in support, the axial connection wire rod one end of machine shaft, the other one end of screw mandrel is provided with positioning seat, screw mandrel is provided with slide block, and two connecting rod one end are connected with slide block, and one end presss from both sides book box with two respectively and is connected in addition.First steering wheel is placed on support, first steering wheel, second steering wheel are connected by rudder blade with the 3rd steering wheel, 3rd steering wheel is provided with steering wheel frame, the other one end of steering wheel frame is connected with the 4th steering wheel, the surface of the 4th steering wheel is provided with suction block, suction block tube connector is connected with vavuum pump, and the steering wheel of described motor, pressing board, flipbook mechanism is connected with single-chip microcomputer with vavuum pump, and steering wheel, the vavuum pump of motor, pressing board, flipbook mechanism are connected with power supply with single-chip microcomputer.
Compared to external automatic book page turning machine, domestic automatic book page turning machine specifically can be divided into reads posture, foot-operated and automatic-turning-page device three class.Automatic-turning-page device uses wider.According to substantially turning over book principle, there is sucked type, twisting wheel type, tape-stripping formula and ratchet-type four kinds.Sucker inhales paper principle comparatively simply, and suction paper efficiency is high; Twisting wheel type imitates people handspring book principle, and the simple but pressure of pickup of structure need be arranged according to the book of different-thickness; It is easy that tape-stripping formula turns over book, but it is larger to books infringement often to turn over book; Ratchet-type adopts ratchet intermittent movement principle, utilizes ratchet point to open paper.
Existing domestic and international automatic page turning device, is found to have plenty of and turns over book function by mechanical handling realization, have plenty of and realized by Electromechanical Control, but control circuit more complicated.If so a simple and compact for structure, book leaf turner that automatic control circuit is simple, cheap can be designed, necessarily have very much market development prospect.
Develop a kind of automatic book page turning machine not only concerning significant the personage of both hands deformity, normal person can be made when doing other things also easily can to enjoy the enjoyment of reading simultaneously, for student, this adds their reading excitement undoubtedly, make them form good reading habit, take leave of the negative effect brought because of electronic reading.
Summary of the invention
The shortcomings such as the structure existed for existing automatic book page turning machine is loaded down with trivial details, and cost is higher, the object of this invention is to provide a kind of structure comparatively simple, and weight is lighter, and the new type auto book leaf turner that automaticity is higher.
Object of the present invention is achieved through the following technical solutions:
A kind of automatic book page turning machine, is characterized in that: this automatic book page turning machine comprises upper plate, base plate, pressure book apparatus, paper-absorbing device, turns over book apparatus, transmission mechanism and support, and described pressure book apparatus comprises cam mechanism, book clamp and spring; Wherein cam mechanism is by camshaft, cam, follower lever and sealed spring; Book clamp is placed in the upper plate left and right sides, and book clamp and upper plate is linked together by spring, and cam follower lver directly contacts with book clamp, and cam rotates and drives book clamp clamping or unclamp; Described paper-absorbing device comprises and turns over book motor, rocking bar, steering wheel, vacuum cup, direct current air pump; Turning over book electric machine rotation drives rocking bar to rotate; Described direct current air pump is installed on base plate, and is linked together by tracheae and vacuum cup; The described book apparatus that turns over comprises vertical bevel gear A, horizontal bevel gear B, bearing block, turning cylinder, page turning rod; Described bevel gear A engages completely with bevel gear B, bevel gear A uniform rotation thus drive bevel gear B uniform rotation in the horizontal plane; Page turning rod is coaxial with bevel gear B; Bevel gear B is fixing on the rotating shaft; Described transmission mechanism is placed on base plate, and transmission mechanism comprises stepper motor, and stepper motor is connected with gear shaft by speed reducing gear pair; Gear shaft is connected with two piece driven shafts symmetrically arranged in the base plate left and right sides by V belt translation; Can make the tilted-putted Bracket setting of book leaf turner bottom base plate.
In the present invention, upper plate is provided with book-groove, in the upper plate upper left corner, illumination small desk lamp is installed.Be bolted to connection between upper plate and base plate.Upper plate is provided with start-stop button, the keyboard of leaf through a book number is set, show the display screen remaining number of pages.
Pressure book apparatus opens the symmetrical book clamp of two of being placed in upper plate successively by two that are arranged on base plate symmetrical cam rotating band moving cam follower lever intermittent movements; Described two cam centre line become 135 degree of angles; Described book clamp top is fixed on upper plate, and is provided with extension spring between upper plate, and cam follower lver drives book clamp to open with closed; Described cam follower lver is provided with sealed spring, avoids driven member to jump and destruction work end desired movement because rising.
Camshaft and bevel gear B turning cylinder use same drive motors, simplify actuating unit; Rotatable ball is equipped with on described page turning rod top, in order to avoid page turning rod spoils paper.
In paper-absorbing device, after the energising of direct current air pump, vacuum cup is made to produce negative pressure thus hold paper; Described book motor drive rocker of turning over is rotated thus opens paper; Steering wheel is equipped with on described rocking bar top, can be rotated counterclockwise 90 degree and allow rocking bar be in same straight line, make page turning rod turn over book smoothly.
This automatic book page turning machine is double-decker, be provided with slant setting support below base plate, book leaf turner main part should have push down paper preventing paper from turning back, inhale paper page turning, automatic page turning, can arrange and turn over book time and interval time and leaf through a book number and there is Presentation Function.
Described pressure book apparatus is placed in the upper plate left and right sides, comprises two cam mechanisms, a pair symmetrical book clamp and extension spring; Cam mechanism is placed between two plates, is inserted with cam follower lver between upper plate, and follower lever moves up and down thus book clamp unclamped or clamps; Cam is fixedly connected with cam drive axle, and cam axle drives camming movement; Extension spring should be connected with to clamp books better between book clamp and upper plate.
Described paper-absorbing device by 6V direct current air pump, tracheae, turn over book motor, rocking bar, steering wheel and vacuum cup and form; Tracheae two ends are connected respectively at the gentle pump steam inlet of vacuum cup; Utilize air pressure principle, when air pump energising, inlet charge makes sucker produce certain negative pressure and hold paper; The described book motor that turns over can turn over book by 360o continuous rotation.
The described book apparatus that turns over directly is connected with transmission mechanism by bevel-gear sett transmission; It comprises one group of principal and subordinate bevel gear, gearratio 1:1, cone angle beta=45o; When gear shaft uniform rotation band dynamic bevel gear A rotates, thus bevel gear B is rotated in the horizontal plane with same rotating speed, the page turning rod connected on the rotating shaft rotates thereupon together, and page turning rod is placed in downside in the middle of upper plate.
Described transmission mechanism is arranged between two plates, comprises stepper motor, speed reducing gear pair, V belt translation, camming movement and Bevel Gear Transmission; Stepper motor uniform rotation is passed on gear shaft by reduction gearing adjutant speed, and gear shaft makes left and right sides cam be rotated counterclockwise by V belt translation; Described gear shaft also should be fixed with bevel gear A, drive page turning rod to rotate by Bevel Gear Transmission.
Described automatic book page turning machine, by general 80C51 Single-chip Controlling, described pressure book apparatus, paper-absorbing device, turns over book apparatus and illuminating lamp etc. by Single-chip Controlling.Described singlechip controller is placed on base plate, can be arranged turn over book time and leaf through a book number and by 1602 display screens display residue numbers of pages by coding; Automatically desk lamp illumination can be opened when dark.Upper plate should be provided with startup and stop button, when pressing start button, and system automatic page turning; Press stop button, system then auto-breaking stops; This automatic book page turning machine electric-mechanic control system, automaticity is higher, and mechanism is also comparatively simple.
Accompanying drawing explanation
Fig. 1 is this automatic book page turning machine upper plate plane structure chart;
Fig. 2 is automatic book page turning machine overall construction drawing;
Fig. 3 is automatic book page turning machine internal structure schematic diagram;
Fig. 4 is automatic book page turning machine transmission system schematic diagram;
Fig. 5 is book leaf turner paper-absorbing device structure diagram;
Fig. 6 is book leaf turner longitudinal cross section;
In figure: 1-upper plate, 2-base plate, 3-press book apparatus, 4-paper-absorbing device, 5-to turn over book apparatus, 6-transmission mechanism and 7-support composition.According to Fig. 1 and Fig. 3, this automatic book page turning machine also should comprise 11-book-groove, 12-desk lamp; The circular sunk screw of 21-bolt, 22-; 31-cam mechanism, 32-book clamp, 33-extension spring; 31-cam mechanism also should comprise 311-cam, 312-cam follower lver, the sealed spring of 313-; 41-turns over book motor, 42-rocking bar, 43-rotate steering wheel, 44-sucker, 45-motor fixing seat, 46-direct current air pump, 47-tracheae; 51-drive bevel gear A, 52-driven wheel of differential B, 53-bearing block, 54-turning cylinder, 55-page turning rod, 56-ball pivot; 61-stepper motor, 62-motor mount, 63-speed reducing gear pair, 64-bearing, 65-bearing block, 66-synchronizing wheel, 67-Timing Belt, 68-camshaft; 63-speed reducing gear pair comprises 631-pinion, 632-driven gear shaft.
Detailed description of the invention
The operation principle of this automatic book page turning machine is described in detail below in conjunction with accompanying drawing.
A kind of automatic book page turning machine automatic book page turning machine, comprises upper plate 1, base plate 2, pressure book apparatus 3, paper-absorbing device 4, turns over book apparatus 5, transmission mechanism 6 and support 7.Book-groove 11 is provided with in the middle of upper plate 1; Be connected with bolt 21 between base plate 2 with upper plate 1, be connected with screw 22 with between transmission mechanism 6; Pressure book apparatus comprises cam mechanism 31(and comprises cam 311, cam follower lver 312 and sealed spring 313), book clamp, 32 extension springs 33; Wherein cam mechanism is by camshaft, cam, follower lever and sealed spring; Book clamp is placed in the upper plate left and right sides, and book clamp and upper plate is linked together by spring, and cam follower lver directly contacts with book clamp, and cam rotates and drives book clamp clamping or unclamp.Paper-absorbing device comprises and turns over book motor 41, rocking bar 42, steering wheel 43, vacuum cup 44, motor fixing seat 45,6V direct current air pump 46 and tracheae 47 etc.; Direct current air pump is installed on base plate, and is linked together by tracheae and vacuum cup.Turn over book apparatus and comprise bevel gear A51, bevel gear B52(gearratio 1:1, cone angle 45 degree), bearing block 53, turning cylinder 54, page turning rod 55 and ball pivot 56; Bevel gear A engages completely with bevel gear B, bevel gear A uniform rotation thus drive bevel gear B uniform rotation in the horizontal plane; Page turning rod is coaxial with bevel gear B; Bevel gear B is fixing on the rotating shaft.Transmission mechanism should comprise stepper motor 61, motor mount 62, speed reducing gear pair 63(comprise 631 pinions, 632 gear shafts, and speed reducing ratio is 1:2, adopts Spur Gear Driving), bearing 64 and bearing block 65, synchronizing wheel 66, Timing Belt 67 and camshaft 68; Stepper motor is connected with gear shaft by speed reducing gear pair; Gear shaft is connected with two piece driven shafts symmetrically arranged in the base plate left and right sides by V belt translation; Can make the tilted-putted Bracket setting of book leaf turner bottom base plate.
Automatic book page turning machine is double-decker, is provided with support 7 below base plate 2, freely can adjust and read visual angle, pressure book apparatus 3, turns over book apparatus 5 and is directly connected with transmission mechanism 6, forms one; Direct current air pump 46 in paper-absorbing device 4 is installed on base plate 2, and all the other are installed on upper face.
Should be placed in book-groove 11 by books in advance when using automatic book page turning machine, strut support 7, adjustment visual angle is to optimal read position; Now press start button, system electrification starts, and now user can arrange leaf through a book number with keyboard according to demand, to specify reading plan better, presses acknowledgement key system after setting completed and formally starts; Whole system adopts Single-chip Controlling, and it is adjustable to turn over book speed; System electrification is placed on stepper motor 61 uniform rotation immediately on base plate, by speed-reduction spur gear pair 63, rotating speed is kept to original half, and gear shaft 632 is with dynamic bevel gear 1 to rotate, and is meanwhile rotated at the same rate by V belt translation driven gear axle 68 again; Because two cam centre line stagger 135o, first right cam opens right side book clamp; Now direct current air pump 46 powers on, and vacuum cup 44 holds paper, turns over book motor 41 and rotates 90o immediately to middle part, when page turning rod 55 is rotated counterclockwise to book-groove 11 place, and air pump 46 power-off, sucker 44 unclamps paper; Steering wheel 43 is rotated counterclockwise 90o makes rocking bar 42 be in same straight line, and page turning rod 55 turns over book smoothly; Now left cam has driven book clamp to open and has accepted paper, and right side book clamp closes; Paper turns over by page turning rod 55 gets back to original position and left side book clamp closes to left side, and so far a complete book process of turning over is complete; Because leaf through a book number is adjustable, book leaf turner starts circulation again after after a predetermined time.
When pressing stop button, system stops after completing this book of turning over process; Whole system by 80C51 Single-chip Controlling, power acquisition 6V DC power supply.
Described automatic book page turning machine has following characteristics:
Employing double-decker designs, and two distances between plates are not more than 75cm, and 4 bolts in 4 pin places connect, and base plate is provided with the support of adjustable reading visual angle, meets the demand of different user;
System is placed in plate, and only realize turning over book and the action of pressure book with a motor, another one motor realizes inhaling paper action, compact conformation, and mechanism is simple, easy to carry; Freely can arrange and turn over the book time and turn over book number of times and with display screen form display residue number of pages, easily formulate the plan of reading, convenient and practical, it is higher to turn over book efficiency, and the upper plate upper left corner is provided with the desk lamp automatically can opened according to light intensity.

Claims (7)

1. an automatic book page turning machine, is characterized in that: this automatic book page turning machine comprises upper plate, base plate, pressure book apparatus, paper-absorbing device, turns over book apparatus, transmission mechanism and support, and described pressure book apparatus comprises cam mechanism, book clamp and spring; Wherein cam mechanism is by camshaft, cam, follower lever and sealed spring; Book clamp is placed in the upper plate left and right sides, and book clamp and upper plate is linked together by spring, and cam follower lver directly contacts with book clamp, and cam rotates and drives book clamp clamping or unclamp; Described paper-absorbing device comprises and turns over book motor, rocking bar, steering wheel, vacuum cup, direct current air pump; Turning over book electric machine rotation drives rocking bar to rotate; Described direct current air pump is installed on base plate, and is linked together by tracheae and vacuum cup; The described book apparatus that turns over comprises vertical bevel gear A, horizontal bevel gear B, bearing block, turning cylinder, page turning rod; Described bevel gear A engages completely with bevel gear B, bevel gear A uniform rotation thus drive bevel gear B uniform rotation in the horizontal plane; Page turning rod is coaxial with bevel gear B; Bevel gear B is fixing on the rotating shaft; Described transmission mechanism is placed on base plate, and transmission mechanism comprises stepper motor, and stepper motor is connected with gear shaft by speed reducing gear pair; Gear shaft is connected with two piece driven shafts symmetrically arranged in the base plate left and right sides by V belt translation; Can make the tilted-putted Bracket setting of book leaf turner bottom base plate.
2. automatic book page turning machine according to claim 1, is characterized in that: on upper plate, be provided with book-groove, is provided with illumination small desk lamp in the upper plate upper left corner.
3. automatic book page turning machine according to claim 1, is characterized in that: be bolted to connection between upper plate and base plate.
4. automatic book page turning machine according to claim 1, is characterized in that: pressure book apparatus opens the symmetrical book clamp of two of being placed in upper plate successively by two that are arranged on base plate symmetrical cam rotating band moving cam follower lever intermittent movements; Described two cam centre line become 135 degree of angles; Described book clamp top is fixed on upper plate, and is provided with extension spring between upper plate, and cam follower lver drives book clamp to open with closed; Described cam follower lver is provided with sealed spring.
5. automatic book page turning machine according to claim 1, is characterized in that: camshaft is all connected with stepper motor with bevel gear B turning cylinder; Rotatable ball is equipped with on described page turning rod top.
6. automatic book page turning machine according to claim 1, is characterized in that: in paper-absorbing device, makes vacuum cup produce negative pressure thus hold paper after the energising of direct current air pump; Described book motor drive rocker of turning over is rotated thus opens paper; Steering wheel is equipped with on described rocking bar top, can be rotated counterclockwise 90 degree and allow rocking bar be in same straight line.
7. automatic book page turning machine according to claim 1, is characterized in that: the display screen of the residue number of pages that is provided with start-stop button on upper plate, arranges the keyboard of leaf through a book number, shows.
CN201410485016.6A 2014-09-22 2014-09-22 A kind of automatic book page turning machine Active CN104228395B (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105291628A (en) * 2015-12-08 2016-02-03 吉林大学 Automatic book overturning bookrack
CN105459663A (en) * 2016-01-05 2016-04-06 南京博物院 Automatic page turning machine for paper documents
CN107839369A (en) * 2017-11-03 2018-03-27 浙江理工大学 The adjustable book leaf turner of helping the disabled of one kind
CN108248244A (en) * 2018-03-28 2018-07-06 枣庄学院 Music score books leaf turner
CN110053063A (en) * 2019-06-04 2019-07-26 西南石油大学 A kind of High Precision Automatic robot for turning book page
CN110486438A (en) * 2018-11-15 2019-11-22 段沧桑 The equipment that one kind realizes pressure page and accessible page turning
CN110859405A (en) * 2019-12-13 2020-03-06 重庆工业职业技术学院 Think political affairs books and place structure and podium thereof
CN110992738A (en) * 2019-10-21 2020-04-10 北京十分科技有限公司 Automatic reading method and device for reading material
CN111524403A (en) * 2020-05-08 2020-08-11 黑龙江工业学院 Foreign language learning interaction platform and method based on campus big data
CN113306324A (en) * 2021-06-07 2021-08-27 广州鹏通起重机电设备工程有限公司 Novel automatic page turning device and method
CN113320311A (en) * 2019-04-21 2021-08-31 牛博阳 Pedal type control mechanism for automatically turning pages of books and using method
CN114834176A (en) * 2022-05-12 2022-08-02 平湖英厚机械有限公司 Paper-sucking page-turning mechanism used in cooperation with flap knife
CN114905879A (en) * 2022-05-11 2022-08-16 承德石油高等专科学校 Automatic translating machine for international business contracts

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Publication number Priority date Publication date Assignee Title
CN105291628A (en) * 2015-12-08 2016-02-03 吉林大学 Automatic book overturning bookrack
CN105459663A (en) * 2016-01-05 2016-04-06 南京博物院 Automatic page turning machine for paper documents
CN105459663B (en) * 2016-01-05 2017-10-03 南京博物院 A kind of paper document automatic page turning device
CN107839369A (en) * 2017-11-03 2018-03-27 浙江理工大学 The adjustable book leaf turner of helping the disabled of one kind
CN108248244A (en) * 2018-03-28 2018-07-06 枣庄学院 Music score books leaf turner
CN110486438B (en) * 2018-11-15 2024-02-09 段沧桑 Equipment for realizing page pressing and barrier-free page turning
CN110486438A (en) * 2018-11-15 2019-11-22 段沧桑 The equipment that one kind realizes pressure page and accessible page turning
CN113320310A (en) * 2019-04-21 2021-08-31 牛博阳 Pedal type control mechanism for automatic page turning of books
CN113320311A (en) * 2019-04-21 2021-08-31 牛博阳 Pedal type control mechanism for automatically turning pages of books and using method
CN110053063A (en) * 2019-06-04 2019-07-26 西南石油大学 A kind of High Precision Automatic robot for turning book page
CN110053063B (en) * 2019-06-04 2024-04-05 西南石油大学 High-precision automatic book turning robot
CN110992738A (en) * 2019-10-21 2020-04-10 北京十分科技有限公司 Automatic reading method and device for reading material
CN110859405A (en) * 2019-12-13 2020-03-06 重庆工业职业技术学院 Think political affairs books and place structure and podium thereof
CN110859405B (en) * 2019-12-13 2022-06-03 重庆工业职业技术学院 Think political affairs books and place structure and podium thereof
CN111524403A (en) * 2020-05-08 2020-08-11 黑龙江工业学院 Foreign language learning interaction platform and method based on campus big data
CN111524403B (en) * 2020-05-08 2022-01-28 黑龙江工业学院 Foreign language learning interaction platform and method based on campus big data
CN113306324A (en) * 2021-06-07 2021-08-27 广州鹏通起重机电设备工程有限公司 Novel automatic page turning device and method
CN114905879B (en) * 2022-05-11 2024-01-23 承德石油高等专科学校 Automatic translating machine for international business contracts
CN114905879A (en) * 2022-05-11 2022-08-16 承德石油高等专科学校 Automatic translating machine for international business contracts
CN114834176A (en) * 2022-05-12 2022-08-02 平湖英厚机械有限公司 Paper-sucking page-turning mechanism used in cooperation with flap knife

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