CN210428883U - Intelligent book - Google Patents

Intelligent book Download PDF

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Publication number
CN210428883U
CN210428883U CN201920540448.0U CN201920540448U CN210428883U CN 210428883 U CN210428883 U CN 210428883U CN 201920540448 U CN201920540448 U CN 201920540448U CN 210428883 U CN210428883 U CN 210428883U
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Prior art keywords
page
control unit
intelligent book
contacts
circuit
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CN201920540448.0U
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Chinese (zh)
Inventor
潘巧娃
马洪生
李恺
马泽楷
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Shenzhen Qianzhou Yunge Technology Co Ltd
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Shenzhen Qianzhou Yunge Technology Co Ltd
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Abstract

The utility model relates to a books field, concretely relates to intelligence books. The intelligent book comprises at least two contacts which are respectively arranged on each page, each contact is respectively matched with the corresponding contact of the adjacent page and is abutted when the pages are attached, and the two contacts of the same content page are connected through a connecting circuit; the intelligent book also comprises a control unit connected with the two contacts of the total page and a functional unit arranged on the book, wherein the control unit controls the functional unit to work correspondingly according to the electric signals fed back by the contacts. The utility model realizes the page identification function; in addition, through the matching of the main control unit and the audio playing unit, the playing of the audio file is realized according to the identification of the current page, the operation is simple, and the problems of high cost, unstable electrical performance, easy damage in subsequent playing and falling and the like are solved; furthermore, the use experience of the children of the low age or other demanders is met, and the interestingness is improved.

Description

Intelligent book
Technical Field
The utility model relates to a books field, concretely relates to intelligence books.
Background
The popular book or book is a new reading form of 'human-book interaction', and the book can make a sound.
There are generally several types.
Firstly, as long as the reading pen is used for clicking characters, pictures and game icons in the vocal book, corresponding characters can be read aloud, character dialogue, bird singing, children's song music, game question and answer and the like, so that the children can tell stories like someone draws voice and color, and also like watching animation pictures, and compared with the traditional children books, the understanding effect and the reading fun of the children's book are greatly improved. However, the operation still needs to be realized by a reading pen, which easily causes the loss of interest of children or is not beneficial to the use of children of low ages.
And secondly, acquiring page turning actions by arranging a sensor device, such as an infrared sensor, a distance sensor or other sensors, on the book, and performing functions consistent with the point reading pen. However, the cost is high, the electrical performance is unstable, and the electric toy is easy to damage during subsequent playing and falling.
Thirdly, the user inputs the page number by using the key to control the playing of the sound file form corresponding to the input page number, and the user operation is complicated.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide an intelligence books, not only easy operation, it is high still to solve the cost, and electrical property is unstable, in the follow-up easy damage scheduling problem of bumping in playing with and giving an alarm.
The utility model provides a technical scheme that its technical problem adopted is: providing an intelligent book, wherein the intelligent book comprises a plurality of pages which are arranged in an overlapped mode, the pages comprise content pages for recording contents and a main bearing page arranged at the most end part, the intelligent book comprises at least two contacts which are respectively arranged on each page, each contact is matched with the corresponding contact position of the adjacent page and is abutted when the pages are attached, and the two contacts of the same content page are connected through a connecting circuit; the intelligent book also comprises a control unit and a functional unit, wherein the control unit is connected with the two contacts of the general page, and the control unit controls the functional unit to work correspondingly according to the electric signals fed back by the contacts.
Wherein, the preferred scheme is: the functional unit is an audio playing unit which comprises a sound output module and an audio file storage module which are both connected with the control unit, and the control unit controls the sound output module to play corresponding audio files in the audio file storage module according to electric signals fed back by the contact.
Wherein, the preferred scheme is: the intelligent book also comprises a control key unit connected with the control unit, and the control unit controls and adjusts the playing sound or playing and switching of the playing content of the sound output module according to the input signal of the control key unit; or the control unit controls the intelligent book to be switched on and off according to the input signal of the control key unit.
Wherein, the preferred scheme is: the intelligent book also comprises a communication interface or a wireless module which is arranged on the book and connected with the control unit, and the control unit adds, deletes and updates the audio files in the audio file storage module through the communication interface or the wireless module.
Wherein, the preferred scheme is: the function unit is a wireless transmission unit which sends the control signal/data signal of the control unit to the outside, and the control signal/data signal is received by the external terminal equipment and works correspondingly.
Wherein, the preferred scheme is: the intelligent book also comprises a code storage module connected with the control unit, the code storage module stores page codes and corresponding electrical information, and the control unit acquires the corresponding page codes according to the electrical information fed back by the current contact and controls the functional unit to work correspondingly according to the page codes.
Wherein, the preferred scheme is: the contact and the control unit are arranged in the general page bearing surface; or the control unit is arranged on the intelligent book; or the control unit can be detachably arranged on the intelligent book.
Wherein, the preferred scheme is: the intelligent book also comprises a power supply and a power supply management circuit, wherein the power supply management circuit is respectively connected with the power supply and the control unit.
Wherein, the preferred scheme is: and a plurality of pages of the intelligent book are arranged for page turning.
Wherein, the preferred scheme is: the connecting circuit is a resistor auxiliary circuit comprising a resistor or/and an auxiliary component; or, the connection circuit comprises a capacitor or/and a capacitor auxiliary circuit; or, the connection circuit comprises an inductor or/and an inductor auxiliary circuit; or, the connection circuit comprises a coding logic circuit/a coding chip or/and a logic auxiliary circuit.
Wherein, the preferred scheme is: the connecting circuit comprises a coding logic circuit/a coding chip or/and a logic auxiliary circuit, at least three contacts are provided, two contacts are respectively connected with the positive electrode and the negative electrode of the logic auxiliary circuit, and the rest contacts are connected with the data transmission end of the logic auxiliary circuit.
Wherein, the preferred scheme is: the control unit also comprises a measurement auxiliary circuit connected with the two contacts on the general page and a control logic circuit/control chip connected with the measurement auxiliary circuit, wherein the measurement auxiliary circuit provides a reference value for the measurement of the electric signals of the contacts.
The utility model has the advantages that compared with the prior art, the utility model designs an intelligent book, and realizes the page identification function by arranging contacts on each page; in addition, through the matching of the main control unit and the audio playing unit, the playing of the audio file is realized according to the identification of the current page, the operation is simple, and the problems of high cost, unstable electrical performance, easy damage in subsequent playing and falling and the like are solved; furthermore, the use experience of the children of the low age or other demanders is met, and the interestingness is improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a schematic structural diagram of an intelligent book summary page of the present invention;
FIG. 2 is a schematic structural diagram of an intelligent book content page of the present invention;
FIG. 3 is a schematic structural diagram of the overlapped page of the present invention;
fig. 4 is a schematic circuit diagram of the audio playing unit of the present invention;
fig. 5 is a schematic circuit structure diagram of the key unit of the present invention;
fig. 6 is a schematic diagram of a circuit structure of the communication method of the present invention;
fig. 7 is a schematic circuit diagram of the wireless transmission unit of the present invention;
fig. 8 is a schematic circuit diagram of the coding storage module of the present invention;
fig. 9 is a schematic diagram of the circuit structure of the power supply of the present invention;
fig. 10 is a schematic circuit diagram of a first embodiment of the connection circuit of the present invention;
fig. 11 is a schematic circuit diagram of a second embodiment of the connection circuit of the present invention;
fig. 12 is a schematic circuit diagram of a third embodiment of the connection circuit of the present invention;
fig. 13 is a schematic circuit diagram of a fourth embodiment of the connection circuit of the present invention;
fig. 14 is a schematic circuit diagram of the measurement auxiliary circuit of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in FIGS. 1, 2 and 3, the present invention provides a preferred embodiment of an intelligent book.
An intelligent book comprises a plurality of pages 100 which are overlapped, wherein each page 100 comprises a content page for recording content and a main bearing page arranged at the most end part, the intelligent book comprises at least two contacts 110 which are respectively arranged on each page 100, each contact 110 is respectively matched with the corresponding contact 110 of the adjacent page 100 in position and is abutted when the pages 100 are attached, and the two contacts 110 of the same content page are connected through a connecting circuit 120; the intelligent book further comprises a control unit 310 connected with the two contacts 110 of the main page and a functional unit arranged on the intelligent book, wherein the control unit 310 controls the functional unit to work correspondingly according to the electric signals fed back by the contacts 110.
The control unit 310 may be a logic circuit or a chip circuit capable of realizing intelligent control in the prior art, so as to receive signals and send out corresponding control commands according to preset commands, and the control function unit is also a functional module capable of being known in the prior art and performs corresponding work according to the received control commands.
The contact 110 is preferably made of a conductive metal material and is embedded in the page 100, and two surfaces of the contact 110 are flush with the surface of the page 100; or, two adjacent pages 100, the surface of the contact 110 of one page 100 is recessed on the surface of the page 100, and the surface of the contact 110 of the other page 100 is protruded on the surface of the page 100, and the two are in interference fit when the pages 100 are folded; alternatively, the surface of the contact 110 of one page 100 is a surface where the elastic protrusion is exposed on the page 100, and the surface of the contact 110 of the other page 100 is a surface where the elastic protrusion is exposed on the page 100, or the surface of the contact 110 of the other page 100 is a surface where the elastic protrusion is exposed on the page 100, and the two are in sufficient interference fit when the pages 100 are folded. Or magnetic attraction techniques may be used at or around the contacts 110 to ensure that the contacts are in sufficient contact.
Specifically, when the multiple pages 100 are overlapped and attached, the two contacts 110 of each page 100 respectively abut against the two contacts 110 of the two adjacent upper and lower pages 100, so as to realize electrical connection. Referring to fig. 2, the first contact 211 of the first page 210 interferes with the third contact 221 of the second page 220 and the fifth contact 231 of the third page 230, respectively, and the second contact 212 of the first page 210 interferes with the fourth contact 222 of the second page 220 and the sixth contact 232 of the third page 230, respectively. And, all contacts 110 are through conflicting each other when the page is closed, finally are connected with two contacts 110 of the total page, and, because two contacts 110 of the same page 100 are all connected through a connecting circuit 120, can feed back the signal of telecommunication after each contact 110 superposes to the control unit 310 together, or obtain by the control unit 310, and according to the difference of the signal of telecommunication, know how many total contacts 110 superposes, thereby obtain how many total pages 100 superposes, thereby obtain current page number, and according to presetting the information of saving, the control function unit carries out corresponding work. Such as sound, light, vibration, blowing and even other functional operations.
Referring to fig. 1, fig. 1 is a schematic view of a generic page, which may be the front or back of a cover sheet, or the first or last page in the cover sheet. Referring to fig. 2, fig. 2 is a schematic diagram of a content page, i.e., a page that is interfered with or separated from a contact 110 of an adjacent page 100 (content page or general page) by the contact 110.
Because the pages 100 with different numbers are overlapped and attached, the two contacts 110 of the page assembly can generate different specific values or different changed electric signals and are received by the control unit 310, and the control unit 310 identifies the overlapping number of the current pages 100 according to the received different specific values or different changed electric signals, so as to judge the current page number of the intelligent book.
Preferably, the contacts 110 and the control unit 310 are both arranged in the total page. Most circuit structure of intelligence books promptly still includes other like power 372, all can set up in always bearing the page, realizes the integral type setting.
Of course, the control unit 310 is a core component, and may be separately provided with a portable module, or may be provided at another location of the smart book. For example, the control unit is arranged at other positions of the intelligent book; or the control unit can be detachably arranged on the intelligent book.
In this embodiment, the multiple pages 100 of the intelligent book are set for turning pages. Moreover, the bottommost page 100 is a generic page; preferably, the contact 110 can be disposed inside the flipping smart book without affecting the contents of the page 100 of the smart book.
In the present embodiment, the control unit 310 is preferably a control chip and its external circuits, such as an MCU chip and its related peripheral circuits. So as to realize the functions of data acquisition, analysis, processing, calling, sending and the like.
Of course, the pages 100 may also be in the form of cards, each of which is overlaid to form the smart book.
As shown in fig. 4, 5 and 6, the present invention provides a preferred embodiment of an audio playing unit.
The functional unit is an audio playing unit, the audio playing unit includes a sound output module 321 and an audio file storage module 322 both connected to the control unit 310, and the control unit 310 controls the sound output module 321 to play the corresponding audio file in the audio file storage module 322 according to the electric signal fed back by the contact 110, so that the intelligent book is formed into a sound book.
Specifically, through the structure of the contact 110, the control unit 310 can know the current page 100 according to the electric signal with the characteristic value fed back by the contact 110, and the audio file storage module 322 stores at least one audio file, and each audio file corresponds to at least one page 100, that is, when the control unit 310 acquires the current page 100, the corresponding audio file is called first and played through the sound output module 321, so that a sound book is realized, and a page is turned over to generate sound. The sound output module 321 may be a power amplifier circuit and the speaker audio file may be a picture introduction, a text reading, or even a music file on the corresponding page 100.
In this embodiment, referring to fig. 5, the smart book further includes a control key unit 330 connected to the control unit 310, and the control unit 310 controls and adjusts the playing sound or the playing content of the sound output module 321 according to the input signal of the control key unit 330; alternatively, the control unit 310 controls the switching of the smart book according to the input signal of the control key unit 330.
The key unit 330 includes a plurality of keys, is connected to the control unit 310, identifies different keys through the control unit 310, and adjusts corresponding functions according to control signals of the keys; a key management circuit may also be provided, where the key is connected to the key management circuit, and the key management circuit obtains the key information and then sends the key information to the control unit 310. Wherein, the key can be provided with a switch key to control the on or off of the whole system, and a dormancy key can also be provided; the keys may also be configured to adjust the sound output module 321 by setting keys for volume adjustment, mode selection, sound source selection, and the like, where the sound source selection is to select a corresponding playing sound file.
In this embodiment, referring to fig. 6, the intelligent book further includes a communication interface 341 or a wireless module 342 disposed on the intelligent book and connected to the control unit 310, and the control unit 310 adds, deletes, and updates the audio files in the audio file storage module 322 through the communication interface 341 or the wireless module 342.
The communication interface 341 may be disposed on the intelligent book, and if the intelligent book is a page-turning book, it may be preferably disposed on a side surface of the page-turning book, and is preferably a USB interface, or may be another type of interface, so as to implement connection between the control unit 310 and the external terminal device 10, or connection between the mobile memory, and implement setting of the audio file in the audio file storage module 322, such as adding, deleting, and updating the audio.
Second, the wireless module 342 may be a bluetooth module, a WIFI module, or even an infrared or NFC module, so as to enable the control unit 310 to be connected to the external terminal device 10, and enable the setting of the audio file in the audio file storage module 322, such as adding, deleting, and updating the audio.
As shown in fig. 7, the present invention provides a preferred embodiment of a wireless transmission unit.
The functional unit is a wireless transmission unit, and the wireless transmission unit sends the control signal/data signal of the control unit 310 to the outside, and the control signal/data signal is received by the external terminal device and performs corresponding work. Specifically, the wireless transmission unit sends out a related instruction or data of the control signal, that is, the control signal/data signal, and receives the related instruction or data by a specific terminal device, where the specific terminal device is a terminal device that has been in communication connection with the wireless transmission unit, such as a mobile phone, a tablet, a computer, an intelligent wearable device, a media playing device, a projector, and even a dedicated device, so as to implement a corresponding function.
For example, the wireless transmission unit sends the control signal/data signal of the control unit 310 to the outside, and the control signal/data signal is received by the wireless sound box, and the received signal may be a control signal, an audio file or a play address.
The wireless transmission mode of the wireless transmission unit can be Bluetooth, WIFI, 2.5G and the like.
As shown in FIG. 8, the present invention provides a preferred embodiment of an intelligent book.
The intelligent book further comprises a code storage module 360 connected with the control unit 310, the code storage module 360 stores a list of correspondence between the page numbers and the characteristic values of the electrical information of the 100 pages, and the control unit 310 acquires the corresponding codes of the corresponding page numbers according to the electrical information fed back by the current contact 110 and controls the functional unit to work correspondingly according to the codes.
Specifically, according to the change of the electrical information or a specific numerical value, a corresponding page code address is set, each code represents 100 pages of a page, and even the code is exactly 100 pages of the page.
Of course, the code storage module 360 and the audio file storage module 322 may be a memory, i.e. a memory connected to the control unit 310. Or may be stored in the control unit 310 chip in advance.
As shown in fig. 9, the present invention provides a preferred embodiment of a power management circuit.
The intelligent book further comprises a power source 372 and a power management circuit 371, wherein the power management circuit 371 is respectively connected with the power source 372 and the control unit 310.
Of course, the power management circuit 371 may also be connected to other functional modules, such as the sound output module 321, to supply power to the sound output module 321, or may also realize collective power supply through the control unit 310.
A power supply 372 charging interface is arranged on the intelligent book, or a wireless charging module is arranged on the intelligent book, so that the power supply 372 is charged; alternatively, the power source 372 may be a removable structure that is replaceable, such as by being attached or detached by a battery.
As shown in fig. 10, 11, 12 and 13, the present invention provides a preferred embodiment of the connection circuit.
The connection circuit 120 comprises a resistor or/and a resistor auxiliary circuit; alternatively, the connection circuit 120 includes a capacitor or/and a capacitor auxiliary circuit; alternatively, the connection circuit 120 includes an inductor or/and an inductor auxiliary circuit; alternatively, the connection circuit 120 may be a logic auxiliary circuit and/or a coding chip including a coding logic circuit for implementing digital coding information.
Of course, the connection manner is not only the parallel connection manner as shown in fig. 9 to 12, but is only a preferable connection manner, and may also be other manners, so as to improve the stability, the sensing sensitivity, the accuracy, and the like of the connection circuit 120.
Specifically described as follows:
in the first embodiment and referring to fig. 10, the connection circuit 120 includes a resistor 411 or/and a resistor auxiliary circuit 412, and the resistor 411 is used as a main component, and different resistance values are formed according to the number of content pages superimposed on the summary page, that is, the number of resistors 411 connected in parallel, so as to determine the page of the current page 100.
In a second scheme and referring to fig. 11, the connection circuit 120 includes a capacitor 421 or/and a capacitor auxiliary circuit 422, and the capacitor 421 is used as a main circuit, and different capacitance values are formed according to the number of content pages superimposed on the summary page, that is, the number of capacitors 421 connected in parallel, so as to determine the page of the current page 100;
in a third scheme and referring to fig. 12, the connection circuit 120 includes an inductor 431 or/and an inductor auxiliary circuit 432, and the inductor 431 is mainly used to form different inductance values according to the number of content pages superimposed on the summary page, that is, the number of inductors 431 connected in parallel, so as to determine the page of the current page 100;
in a fourth embodiment and referring to fig. 13, the connection circuit 120 includes a coding logic circuit/coding chip 441 or/and a logic auxiliary circuit 442, and obtains all valid page coding values, that is, obtains a current page coding value according to the number of content pages overlapped with the summary page, so as to determine the pages of the current page 100.
And in fig. 12, there are at least three contacts, two of the contacts 110 are respectively connected to the positive electrode and the negative electrode of the coding logic circuit/coding chip 441, and the rest of the contacts 110 are connected to the data transmission end of the coding logic circuit/coding chip 441. For example, three contacts are provided, two of the contacts 110 are respectively connected to the positive electrode and the negative electrode of the coding logic circuit/coding chip 441, and the other contact 110 is connected to a data transmission end of the coding logic circuit/coding chip 441, and all the valid page coding values obtained through output are used for representing the pages of the current page 100.
As shown in fig. 14, the present invention provides a preferred embodiment of a measurement auxiliary circuit.
The control unit 310 further includes a measurement auxiliary circuit 392 connected to the two contacts 110 on the general page, and a control logic circuit/control chip 391 connected to the measurement auxiliary circuit 392, wherein the measurement auxiliary circuit 392 provides a reference value for the measurement contacts 110.
Specifically, the auxiliary measurement circuit 392 provides a fixed value, which may be a voltage value, a current value, an inductance value, a capacitance value, etc., to the contact 110 to share the voltage or other electrical information on the circuit corresponding to the contact 110 of the page 100, and finally the voltage or other electrical information of the page 100 is converted into the page number of the current page 100.
The control logic/control chip 391 controls the measurement auxiliary circuit 392 to turn on or off, and may even control the specific value outputted by the measurement auxiliary circuit 392. And control logic/control chip 391 obtains the data information gathered from contacts 110.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is intended to cover all equivalent changes and modifications made within the scope of the present invention.

Claims (12)

1. An intelligent book, the intelligent book includes a plurality of pages that overlap and set up, the page includes the content page that is used for documenting the content and sets up the total page that holds at the extreme, its characterized in that: the intelligent book comprises at least two contacts which are respectively arranged on each page, each contact is respectively matched with the corresponding contact of the adjacent page and is abutted when the pages are attached, and the two contacts of the same content page are connected through a connecting circuit;
the intelligent book also comprises a control unit and a functional unit, wherein the control unit is connected with the two contacts of the general page, and the control unit controls the functional unit to work correspondingly according to the electric signals fed back by the contacts.
2. The intelligent book of claim 1, wherein: the functional unit is an audio playing unit which comprises a sound output module and an audio file storage module which are both connected with the control unit, and the control unit controls the sound output module to play corresponding audio files in the audio file storage module according to electric signals fed back by the contact.
3. The intelligent book of claim 2, wherein: the intelligent book also comprises a control key unit connected with the control unit, and the control unit controls and adjusts the playing sound or playing and switching of the playing content of the sound output module according to the input signal of the control key unit; or the control unit controls the intelligent book to be switched on and off according to the input signal of the control key unit.
4. The intelligent book of claim 2, wherein: the intelligent book also comprises a communication interface or a wireless module which is arranged on the book and connected with the control unit, and the control unit adds, deletes and updates the audio files in the audio file storage module through the communication interface or the wireless module.
5. The intelligent book of claim 1, wherein: the function unit is a wireless transmission unit which sends the control signal/data signal of the control unit to the outside, and the control signal/data signal is received by the external terminal equipment and works correspondingly.
6. The intelligent book of claim 1, wherein: the intelligent book also comprises a code storage module connected with the control unit, the code storage module stores page codes and a corresponding electric information corresponding relation list, and the control unit acquires the corresponding page codes according to the electric information fed back by the current contact and controls the functional unit to work correspondingly according to the codes.
7. The intelligent book of claim 1, wherein: the contact and the control unit are arranged in the general page bearing surface; or the control unit is arranged on the intelligent book; or the control unit can be detachably arranged on the intelligent book.
8. The intelligent book of claim 1 or 7, wherein: the intelligent book also comprises a power supply and a power supply management circuit, wherein the power supply management circuit is respectively connected with the power supply and the control unit.
9. The intelligent book of claim 1, wherein: and a plurality of pages of the intelligent book are arranged for page turning.
10. The intelligent book of claim 1, wherein: the connecting circuit is a resistor auxiliary circuit comprising a resistor or/and an auxiliary component; or, the connection circuit comprises a capacitor or/and a capacitor auxiliary circuit; or, the connection circuit comprises an inductor or/and an inductor auxiliary circuit; or, the connection circuit comprises a coding logic circuit/a coding chip or/and a logic auxiliary circuit.
11. The intelligent book of claim 10, wherein: the connecting circuit comprises a coding logic circuit/a coding chip or/and a logic auxiliary circuit, at least three contacts are provided, two contacts are respectively connected with the positive electrode and the negative electrode of the logic auxiliary circuit, and the rest contacts are connected with the data transmission end of the logic auxiliary circuit.
12. The intelligent book of claim 1, wherein: the control unit also comprises a measurement auxiliary circuit connected with the two contacts on the general page and a control logic circuit/control chip connected with the measurement auxiliary circuit, wherein the measurement auxiliary circuit provides a reference value for the measurement of the electric signals of the contacts.
CN201920540448.0U 2019-04-19 2019-04-19 Intelligent book Active CN210428883U (en)

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CN201920540448.0U CN210428883U (en) 2019-04-19 2019-04-19 Intelligent book

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CN201920540448.0U CN210428883U (en) 2019-04-19 2019-04-19 Intelligent book

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110009945A (en) * 2019-04-19 2019-07-12 潘巧娃 A kind of intelligent book

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110009945A (en) * 2019-04-19 2019-07-12 潘巧娃 A kind of intelligent book

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