CN115171435A - Electronic blackboard - Google Patents
Electronic blackboard Download PDFInfo
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- CN115171435A CN115171435A CN202110369196.1A CN202110369196A CN115171435A CN 115171435 A CN115171435 A CN 115171435A CN 202110369196 A CN202110369196 A CN 202110369196A CN 115171435 A CN115171435 A CN 115171435A
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- signal
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- 239000004020 conductor Substances 0.000 claims abstract description 130
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 76
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 230000003750 conditioning effect Effects 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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- Business, Economics & Management (AREA)
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The embodiment of the invention discloses and provides an electronic blackboard, which relates to the energy-saving control technology of electronic equipment and comprises the following steps: the electromagnetic shielding device comprises an auxiliary screen assembly, a main screen assembly and an electromagnetic induction device for generating magnetic lines of force, wherein a control circuit is arranged in the main screen assembly, and the auxiliary screen assembly can slide relative to the main screen assembly; the auxiliary screen assembly is provided with a conductor structure, and when the auxiliary screen assembly slides, the conductor structure arranged on the blackboard can cut magnetic lines of force generated by the electromagnetic induction device. When the user perhaps closed vice screen assembly through sliding vice screen assembly inwards, the conductor on the blackboard slides the electromagnetic induction device simultaneously and cuts the magnetic field line, and control circuit can acquire the last signal of telecommunication of conductor structure, and then closes the power consumption unit of main screen assembly through control circuit.
Description
Technical Field
The present disclosure relates to a control technology of an electronic device, and more particularly, to an electronic blackboard.
Background
At present, in some application scenes, a blackboard needs to be arranged, and content display can be performed in a writing mode on the blackboard. For example, a blackboard may be set in a classroom, or a blackboard may be set in some conference rooms.
Among them, in the displaying process, besides the written content, the electronic content needs to be displayed, so that there exists an electronic blackboard in the prior art, which has a traditional blackboard capable of writing content and is further provided with a flat plate capable of displaying electronic content.
After the user closes the blackboard, the blackboard can shield the flat board, if the flat board is in the open state, the user is difficult to perceive. Therefore, when a user uses the electronic blackboard in the prior art, the user easily forgets to close the flat plate, so that the electric energy loss is serious, and the flat plate is in an open state for a long time, so that the service life of the blackboard is also shortened.
Disclosure of Invention
The present disclosure provides an electronic blackboard to solve the problem that a flat plate in the electronic blackboard in the prior art is not closed, resulting in serious power loss, and also reducing the service life of the blackboard.
A first aspect of the present disclosure is to provide an electronic blackboard, including:
the electromagnetic induction type screen comprises an auxiliary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the auxiliary screen assembly can slide relative to the main screen assembly;
the auxiliary screen assembly is provided with a conductor structure, and the control circuit is electrically connected with the conductor structure;
when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic lines of force generated by the electromagnetic induction device and transmits an electric signal to the control circuit; and the control circuit controls the power supply of the main screen assembly to be turned off according to the electric signal.
A second aspect of the present disclosure is to provide an electronic blackboard, including:
the device comprises an auxiliary screen assembly, a main screen assembly and a conductor structure, wherein a control circuit is arranged in the main screen assembly and is electrically connected with the conductor structure; the secondary screen assembly is slidable relative to the primary screen assembly;
an electromagnetic induction device for generating magnetic lines of force is arranged on the auxiliary screen component; when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic lines of force generated by the electromagnetic induction device and transmits an electric signal to the control circuit; and the control circuit is used for controlling the power supply in the main screen assembly to be turned off according to the electric signal.
The electronic blackboard that this disclosure provides includes: the device comprises an auxiliary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the auxiliary screen assembly can slide relative to the main screen assembly; the auxiliary screen assembly is provided with a conductor structure, and when the auxiliary screen assembly slides, the conductor structure can cut magnetic lines of force generated by the electromagnetic induction device. When the user closes the auxiliary screen assembly through the sliding body, the sliding action can be sensed in a mode of cutting the conductor and the electromagnetic induction device, and then the power supply of the main screen assembly is closed through the control circuit.
Drawings
FIG. 1 is a schematic view of an electronic blackboard shown in an exemplary embodiment;
FIG. 2 is a schematic view showing a structure of an electronic blackboard according to an exemplary embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a conductor structure cutting magnetic lines generated by an electromagnetic induction device according to an exemplary embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic blackboard according to an exemplary embodiment of the present application;
FIG. 5 is a schematic diagram of an electromagnetic induction device according to an exemplary embodiment of the present application;
FIG. 6 is a schematic diagram of a control circuit according to an exemplary embodiment of the present application;
FIG. 7 is a schematic diagram of a sensing circuit according to an exemplary embodiment of the present application;
fig. 8 is a schematic structural view of an electronic blackboard according to an exemplary embodiment of the present application.
Detailed Description
Fig. 1 is a schematic view of an electronic blackboard according to an exemplary embodiment.
As shown in fig. 1, the electronic blackboard includes a sub-screen assembly 11 and a main screen assembly 12. In use, the secondary screen assembly 11 can be written to, and electronic documents, slides, etc. can be played through the primary screen assembly 12. For example, the home screen assembly may be connected to an electronic device, and electronic data may be played on the home screen assembly through the electronic device.
As shown in fig. 1, after the main screen assembly is used, the power on/off button on the main screen assembly may be clicked to turn off the main screen assembly.
However, in some cases, after the user has used the tablet, the secondary screen assembly may be slid so that it moves to an intermediate position covering the primary screen assembly. However, in this case, it is not easy for the user to find that the home screen assembly is in the on state, and thus forgets to turn off the home screen assembly.
In order to solve the technical problem, in the scheme provided by the application, the conductor structure and the electromagnetic induction device are respectively arranged on the auxiliary screen assembly and the main screen assembly, and when the auxiliary screen assembly slides, the conductor structure cuts an electromagnetic wire generated by the electromagnetic induction device, so that an electric signal can be generated. Therefore, the method provided by the application can detect the electric signal generated when the auxiliary screen assembly slides relative to the main screen assembly, and further control the power supply of the main screen assembly to be turned off.
Fig. 2 is a schematic structural view of an electronic blackboard according to an exemplary embodiment of the present application.
As shown in fig. 2, the electronic blackboard provided by the present application includes: a secondary screen assembly 21 and a primary screen assembly 22.
The electronic blackboard comprises a main screen assembly and an auxiliary screen assembly; the auxiliary screen assembly is arranged beside the main screen assembly through an auxiliary screen wall hanging structure; the primary screen component can be an interactive flat plate, and the secondary screen component can be a common blackboard.
Wherein, the control circuit 23 is arranged in the main screen assembly 22, and the auxiliary screen assembly 21 can slide relative to the main screen assembly 22. For example, a rail may be provided on the fixing member fixing the sub screen assembly 21 and the main screen assembly 22, and the sub screen assembly 21 may slide along the rail.
In particular, the secondary screen assembly 21 is provided with a conductor structure 24, for example, the conductor structure 24 may be provided at an upper edge of the secondary screen assembly 21. The conductor structure 24 is an object that can cut magnetic lines of force to generate an electrical signal, and may be, for example, an iron block.
Further, the conductor structure 24 is connected to the control circuit 23, and the control circuit 23 can sense an electrical signal when the electrical signal is present on the conductor structure 24.
In practical application, the electronic blackboard provided by the application is also provided with an electromagnetic induction device 25 for generating magnetic lines of force. The electromagnetic induction device 25 is capable of generating magnetic lines of force. The electromagnetic induction device 25 can be fixed on a wall or other fixtures needing to fix the electronic blackboard during use. For example, the electromagnetic induction device 25 may be disposed above the main screen assembly 22, and a portion of the electromagnetic induction device 25 may shield the main screen assembly 22.
In one embodiment, the electromagnetic induction device 25 may be provided with a magnet and an iron block, and between the magnet and the iron block, there are magnetic lines of force of the magnet directed to the iron block.
When the sub-screen assembly 21 slides, the conductor structure 24 disposed on the sub-screen assembly 21 can cut magnetic lines generated by the electromagnetic induction device 25, and further, an electrical signal can be generated in the conductor structure 24.
If the main screen assembly 22 is in the on state, the control circuit 23 in the main screen assembly 22 is also in the working state. And the control circuit 23 is connected to the conductor structure 24, the control circuit 23 is able to receive an electrical signal of the conductor structure 24.
Fig. 3 is a schematic diagram illustrating a conductor structure cutting magnetic lines generated by an electromagnetic induction device according to an exemplary embodiment of the present application.
As shown in fig. 3, the electromagnetic induction device 25 can generate magnetic lines of force as shown by 31, the conductor structure 24 cuts the magnetic lines of force 31, so that electromotive force is generated in the conductor structure 24, and the control circuit 23 connected with the conductor structure 24 can sense the signal.
Specifically, the control circuit 23 may turn off the power of the main screen assembly after the control circuit 23 senses the electrical signal of the conductor structure 24. For example, the control circuit 23 may be disconnected from the power source, thereby turning off the main screen assembly 22.
If the magnetic field lines are in the direction shown in fig. 3, the moving direction of the conductor structure may be along the z-axis.
Therefore, after the user closes the sub-screen assembly 21, the sliding of the sub-screen assembly 21 will drive the conductor structure 24 disposed thereon to move, so that the conductor structure 24 cuts the magnetic lines of force generated by the electromagnetic induction device 25. In the process of cutting magnetic lines of force, can produce the signal of telecommunication among the conductor structure 24 to in transmitting the signal of telecommunication to control circuit 23, make control circuit 23 can close the power of main screen subassembly, avoid the main screen subassembly to be opened for a long time, cause the problem that the electric energy loss seriously still can reduce the life of blackboard.
The application provides an electronic blackboard, includes: the electromagnetic induction type screen comprises an auxiliary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the auxiliary screen assembly can slide relative to the main screen assembly; the auxiliary screen assembly is provided with a conductor structure, and the control circuit is electrically connected with the conductor structure; when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic lines of force generated by the electromagnetic induction device and transmits an electric signal to the control circuit; the control circuit controls the power supply of the main screen assembly to be turned off according to the electric signal. In the scheme that this application provided, thereby when the user closes vice screen assembly through the slip body, can pass through this sliding motion of mode perception of conductor and electromagnetic induction device cutting, and then close the power of main screen assembly through control circuit.
In an alternative embodiment, the conductor structure 24 is provided on a first edge of the secondary screen assembly 21; the electromagnetic induction device 25 is provided on the fixture. For example, the first edge can be an upper edge of the secondary screen assembly 21 and the fixture can be, for example, a wall or the like.
The conductor structure provided on the secondary screen assembly 21 is capable of cutting the magnetic lines of force generated by the electromagnetic induction device 25 when the secondary screen assembly 21 slides relative to the primary screen assembly 22.
Fig. 4 is a schematic structural diagram of an electronic blackboard according to an exemplary embodiment of the present application.
As shown in fig. 4, the electronic blackboard provided by the present application is provided with two sub-screen assemblies. The first sub-screen assembly 41 and the second sub-screen assembly 42 are respectively disposed on two sides of the main screen assembly 22, and the first sub-screen assembly 41 and the second sub-screen assembly 42 can respectively slide relative to the main screen assembly 22.
For example, when a user desires to use the main screen assembly 22, the user may push the first sub-screen assembly 41 and the second sub-screen assembly 42 to both sides. Exposing the primary screen assembly 22.
Wherein, when the user does not need to use the main screen assembly 22, the user can push the first sub-screen assembly 41 and the second sub-screen assembly 42 towards the middle, so that the first sub-screen assembly 41 and the second sub-screen assembly 42 slide to the middle position, which is convenient for displaying the user's writing content. Meanwhile, the first sub-shield assembly 41 and the second sub-shield assembly 42 may cover the main shield assembly 22 when they are slid to the intermediate position.
In an alternative embodiment, the conductor structure may be provided on the first sub-shield assembly 41 or on the second sub-shield assembly 42.
If the conductor structure is disposed on the first sub-shield assembly 41, the conductor structure disposed on the first sub-shield assembly 41 can cut the magnetic lines of force generated by the electromagnetic induction device 25 when the first sub-shield assembly 41 moves toward the center. If the conductive structure is disposed on the second sub-shield assembly 41, the conductive structure disposed on the second sub-shield assembly 42 can cut the magnetic lines of force generated by the electromagnetic induction device 25 when the second sub-shield assembly 42 moves toward the center.
With continued reference to fig. 4, when two sub-screen assemblies are provided, the electronic blackboard provided by the present application may further be provided with two conductor structures, such as the first conductor structure 43, and the second conductor structure 44. The first conductor structure 43 may be disposed on the first sub-shield assembly 41 and the second conductor structure 44 may be disposed on the second sub-shield assembly 42.
As the first sub-shield assembly 41 slides, the first conductor structure 43 provided on the first sub-shield assembly 41 also moves. As second secondary shield assembly 42 slides, second conductor structure 44 disposed on second secondary shield assembly 42 also moves.
Specifically, as shown in fig. 4, the electronic blackboard provided by the present application may further include two electromagnetic induction devices, such as a first electromagnetic induction device 45 and a second electromagnetic induction device 46.
Further, the first electromagnetic induction device 45 and the second electromagnetic induction device 46 may be respectively disposed on the fixture. The connection line direction of the first electromagnetic induction device 45 and the second electromagnetic induction device 46 may be the same as the moving direction of the conductor structure.
In practical applications, when the first sub-shield assembly 41 slides, the first conductor structure 43 cuts the magnetic lines generated by the first electromagnetic induction device 45. When the second sub-shield assembly 42 slides, the second conductor structure 44 cuts magnetic lines of force generated by the second electromagnetic induction device 46.
In an alternative embodiment, the first conductor structure 43 and the second conductor structure 44 may be connected to the control circuit 23. When the first sub-shield assembly 41 and the second sub-shield assembly 42 slide, electromotive forces are generated in the first conductor structure 43 and the second conductor structure 44, so that the control circuit 23 senses electrical signals generated by the first conductor structure 43 and the second conductor structure 44, and the control circuit 23 can receive the electrical signals.
The control circuit 23 may receive an electrical signal in the first conductor structure 43 and the second conductor structure 44, and after the control circuit 23 receives the electrical signal in the first conductor structure 43 and/or the second conductor structure 44, the control circuit may control the power of the main screen assembly 22 to be turned off.
In an alternative embodiment, the control circuit 23 may control the power of the main screen assembly 22 to be turned off when receiving the electrical signals from the first conductor structure 43 and the second conductor structure 44. In this embodiment, the main panel assembly 22 can be closed again when both the first sub-panel assembly 41 and the second sub-panel assembly 42 slide, thereby preventing the main panel assembly from being closed by mistake.
Specifically, when the positions of the conductor structure and the electromagnetic induction device are set, the first conductor structure 43 may be made to cut magnetic lines generated by the first electromagnetic induction device 45 when the first sub-shield assembly 41 slides to the intermediate position, and the second conductor structure 44 may be made to cut magnetic lines generated by the second electromagnetic induction device 46 when the second sub-shield assembly 42 slides to the intermediate position.
In another alternative embodiment, when the first sub-shield 41 slides, the first conductor structure 43 cuts the magnetic lines of force generated by the first electromagnetic induction device 45, so that an electromotive force can be generated in the first conductor structure 43, and an electrical signal can be sent to the control circuit 23.
When the second sub-shield assembly 42 slides, the second conductor structure 44 cuts magnetic lines of force generated by the second electromagnetic induction device 46, so that electromotive force can be generated in the second conductor structure 44, and an electrical signal can be sent to the control circuit 23.
Fig. 5 is a schematic structural diagram of an electromagnetic induction device according to an exemplary embodiment of the present application.
As shown in fig. 5, the electromagnetic induction device 50 includes a magnet 51 for generating a magnetic field, and an iron block 52 for guiding the direction of magnetic lines. In the electromagnetic induction device 50, magnetic lines of force directed from the magnet 51 to the iron block 52 can be generated.
When the auxiliary screen assembly moves, the moving direction of the conductor structure arranged on the auxiliary screen assembly is perpendicular to the direction of the magnet pointing to the iron block.
For example, when a conductor structure and an electromagnetic induction device are provided in the electronic blackboard, the conductor structure can cut magnetic lines generated by the electromagnetic induction device. The moving direction of the conductor structure is vertical to the direction of the magnetic force lines.
For another example, when the electronic blackboard is provided with a first conductor structure, a second conductor structure, a first electromagnetic induction device and a second electromagnetic induction device, the first conductor structure can cut a first magnetic line generated by the first electromagnetic induction device, and the second conductor structure can cut a second magnetic line generated by the second electromagnetic induction device. The moving direction of the first conductor structure is vertical to the direction of the first magnetic force line, and the moving direction of the second conductor structure is vertical to the direction of the second magnetic force line.
Specifically, the electromagnetic induction device 50 further includes a U-shaped frame 53, and the electromagnetic induction device 50 can be fixed on the main screen assembly 22 through the U-shaped frame 53.
Further, the U-shaped frame 53 has a first rim 531 and a second rim 532 opposite to each other. The first rim 531 and the second rim 532 are provided with a magnet 51 for generating a magnetic field and an iron block 52 for guiding the direction of magnetic lines, respectively.
In practical applications, the first rim 531 or the second rim 532 may be disposed on a fixture, for example, a hole 533 for installing a screw may be disposed on the first rim 531, so that the electromagnetic induction device 50 may be fixed on the fixture by a bolt.
Wherein the conductor structure disposed on the secondary screen assembly is able to slide into the groove 534 of the U-shaped frame 53 when the secondary screen assembly slides. For example, the conductor structure 54 is disposed on the upper edge 55 of the sub-screen assembly, and the upper edge 52 of the sub-screen assembly is in communication with the conductor structure 51 disposed to pass through the groove 534 of the U-shaped frame 53 when the sub-screen assembly is moved. Thereby causing the conductor structure 54 to cut the magnetic field lines generated by the magnet 51.
Fig. 6 is a schematic structural diagram of a control circuit according to an exemplary embodiment of the present application.
As shown in fig. 6, the present application provides a control circuit 60 including: signal conditioning circuit 61, sensing circuit 62.
The conductor structure and the signal conditioning circuit 61. For example, if one conductor structure is provided, the one conductor structure may be connected to the signal conditioning circuit 61. If two conductor structures are provided, both conductor structures may be connected to the signal conditioning circuit 61.
Specifically, when the conductor structure cuts the magnetic force lines generated by the electromagnetic induction device, the conductor structure and the signal conditioning circuit form a closed path, and the conductor structure can generate an electromotive force to transmit an electric signal to the signal conditioning circuit 61.
Further, the signal conditioning circuit 61 may transmit the received electrical signal to the sensing circuit 62; the sensing circuit 62 controls the power of the main screen assembly to be turned off according to the received electric signal.
In one embodiment, the signal conditioning circuit 61 may send a voltage signal to the sensing circuit 62 after sensing the electrical signal of the conductor structure. For example, when the first and second conductor structures are provided, the signal conditioning circuit 61 sends a first voltage signal to the sensing circuit 62 when sensing that an electrical signal is generated in the first conductor structure, and sends a second voltage signal to the sensing circuit 62 when sensing that an electrical signal is generated in the second conductor structure. Therefore, the induction circuit controls the power supply of the main screen component to be turned off according to the received signal. For example, when the first signal and the second signal are received, the power of the main screen assembly is controlled to be turned off.
Fig. 7 is a schematic structural diagram of a sensing circuit according to an exemplary embodiment of the present application.
As shown in fig. 7, the present application provides a sensing circuit 70 including: signal conversion circuit 71, signal acquisition unit 72, control unit 73.
The signal conversion circuit 71 is connected to the signal conditioning circuit 61, and is configured to convert the voltage signal of the signal conditioning circuit into a digital signal. For example, the signal conditioning circuit 61 may send a first voltage signal to the signal conversion circuit 71 if it senses that an electrical signal is generated in the first conductor structure, and may send a second voltage signal to the signal conversion circuit 71 if it senses that an electrical signal is generated in the second conductor structure.
Specifically, the signal conversion circuit 71 may convert the voltage signal into a digital signal after receiving the voltage signal. For example, the signal conversion circuit 71 may convert the first voltage signal into a first digital signal after receiving the first voltage signal. The signal conversion circuit 71 may convert the second voltage signal into a second digital signal after receiving the second voltage signal.
Further, the signal conversion circuit 71 transmits the converted digital signal to the signal acquisition unit 72, and the signal acquisition unit 72 may send a transmission signal to the control unit 73. For example, the transmission signal may be sent to the control unit 73 through an asynchronous transceiver transmitter. For example, if signal conversion circuit 71 receives the first digital signal and the second digital signal, signal conversion circuit 71 may send information characterizing the sliding of the first sub-screen assembly and the sliding of the second sub-screen assembly to control unit 73.
In practical applications, the control unit 73 may cut off the power of the main screen assembly according to the received transmission signal. For example, the primary screen assembly may be powered off when information characterizing a first secondary screen assembly slide and a second secondary screen assembly slide are received simultaneously.
Wherein the control unit is specifically configured to: cutting off the backlight power supply of the main screen assembly and/or cutting off the power supply of the control circuit in the main screen assembly.
Fig. 8 is a schematic structural view of an electronic blackboard shown in an exemplary embodiment of the present application.
As shown in fig. 8, the electronic blackboard provided by the present application includes:
a secondary screen assembly 81 and a primary screen assembly 82, wherein the primary screen assembly 81 is provided with a control circuit 83, and the secondary screen assembly 81 can slide relative to the primary screen assembly 82;
the secondary screen assembly 81 is provided with an electromagnetic induction device 83 for generating magnetic lines of force.
The electronic blackboard provided by the present application is further provided with a conductor structure 84, for example, the conductor structure 84 can be fixed on a fixture, and the control circuit 83 is electrically connected with the conductor structure 84;
when the primary screen assembly 82 is in an open state, if the secondary screen assembly 81 slides, the conductor structure 84 cuts magnetic lines generated by the electromagnetic induction device 83 and transmits an electrical signal to the control circuit 83; the control circuit 83 is configured to control the power supply in the main screen assembly 82 to be turned off according to the electrical signal.
The scheme provided by this embodiment is similar to the embodiment shown in fig. 2.
Specifically, the electromagnetic induction device 83 and the conductor structure 84 may be configured according to actual situations, so that the conductor structure 84 is configured to cut magnetic lines generated in the electromagnetic induction device 83.
The scheme provided by the embodiment can be combined with the scheme provided by the embodiment shown in fig. 8 to obtain the structural scheme of the electronic blackboard.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
It should be noted that the terms "first" and "second" in the description of the present invention are used merely for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected or in mutual relationship between the two elements unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. An electronic blackboard, comprising:
the electromagnetic induction type screen comprises an auxiliary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the auxiliary screen assembly can slide relative to the main screen assembly;
the auxiliary screen assembly is provided with a conductor structure, and the control circuit is electrically connected with the conductor structure;
when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic lines of force generated by the electromagnetic induction device and transmits an electric signal to the control circuit; and the control circuit controls the power supply of the main screen assembly to be turned off according to the electric signal.
2. The electronic blackboard of claim 1, wherein the conductor structure is disposed on a first edge of the secondary screen assembly;
the electromagnetic induction device is arranged on the fixed object.
3. The electronic blackboard according to claim 1, characterised in that two of said secondary screen assemblies are provided;
the first auxiliary screen assembly and the second auxiliary screen assembly are respectively positioned on two sides of the main screen assembly; the first secondary screen assembly and the second secondary screen assembly can respectively slide relative to the main screen assembly.
4. The electronic blackboard according to claim 3, wherein the conductor structure is located on the first blackboard or the conductor structure is located on the second blackboard.
5. The electronic blackboard according to claim 3, characterised in that there are provided two said conductor structures, two said electromagnetic induction means;
the first conductor structure is arranged on the first blackboard, and the second conductor structure is arranged on the second blackboard;
the first conductor structure and the second conductor structure are respectively connected with the control circuit;
if the first blackboard slides relative to the main screen assembly, the first conductor cuts magnetic lines of force generated by the first electromagnetic induction device, so that the first conductor structure transmits an electric signal to the control circuit;
if the second blackboard slides relative to the main screen assembly, the second conductor cuts magnetic lines of force generated by the second electromagnetic induction device, so that the second conductor structure transmits an electric signal to the control circuit.
6. An interactive blackboard according to any one of claims 1 to 5, in which the electromagnetic induction means includes a magnet for generating a magnetic field, an iron block for directing the direction of the magnetic lines of force.
7. The electronic blackboard of claim 6, wherein the moving direction of the conductor structure disposed on the sub-screen assembly is perpendicular to the direction in which the magnet points to the iron blocks when the sub-screen assembly moves.
8. The electronic blackboard of claim 6, wherein the electromagnetic induction device further includes a U-shaped frame, and a magnet for generating a magnetic field and an iron block for guiding the direction of magnetic lines of force are respectively disposed on two opposite first and second frames in the U-shaped frame;
the first frame or the second frame is arranged on a fixed object, and when the auxiliary screen assembly slides, the conductor structure arranged on the auxiliary screen assembly can slide into the groove of the U-shaped frame body.
9. The electronic blackboard according to any of claims 1 to 5, wherein the control circuit includes a signal conditioning circuit, a sensing circuit;
the conductor structure is connected with the signal conditioning circuit, and the signal conditioning circuit is connected with the induction circuit;
when the conductor structure cuts the magnetic force lines generated by the electromagnetic induction device, the conductor structure and the signal conditioning circuit form a closed passage, and the conductor structure transmits an electric signal to the signal conditioning circuit;
the signal conditioning circuit transmits the received electric signal to the induction circuit; the sensing circuit controls the power supply of the main screen assembly to be turned off according to the received electric signal.
10. The electronic blackboard of claim 9, wherein the sensing circuit includes: the device comprises a signal conversion circuit, a signal acquisition unit and a control unit;
the signal conversion circuit is connected with the signal conditioning circuit and is used for converting the voltage signal of the signal conditioning circuit into a digital signal;
the signal conversion circuit transmits the converted digital signal to the signal acquisition unit, and the signal acquisition unit sends a transmission signal to the control unit;
and the control unit cuts off the power supply of the main screen component according to the transmission signal.
11. The electronic blackboard according to claim 10, wherein the control unit is specifically configured to:
and cutting off the backlight power supply of the main screen assembly, and/or cutting off the power supply of a control circuit in the main screen assembly.
12. An electronic blackboard, comprising:
the device comprises an auxiliary screen assembly, a main screen assembly and a conductor structure, wherein a control circuit is arranged in the main screen assembly and is electrically connected with the conductor structure; the secondary screen assembly is slidable relative to the primary screen assembly;
an electromagnetic induction device for generating magnetic lines of force is arranged on the auxiliary screen component;
when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic lines of force generated by the electromagnetic induction device and transmits an electric signal to the control circuit;
and the control circuit is used for controlling the power supply in the main screen assembly to be turned off according to the electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110369196.1A CN115171435B (en) | 2021-04-06 | 2021-04-06 | Electronic blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110369196.1A CN115171435B (en) | 2021-04-06 | 2021-04-06 | Electronic blackboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115171435A true CN115171435A (en) | 2022-10-11 |
| CN115171435B CN115171435B (en) | 2024-02-23 |
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| CN202110369196.1A Active CN115171435B (en) | 2021-04-06 | 2021-04-06 | Electronic blackboard |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781713A (en) * | 2016-12-16 | 2017-05-31 | 明基电通有限公司 | A kind of plug-type multimedia performance device |
| CN107170300A (en) * | 2017-07-17 | 2017-09-15 | 深圳中电数码显示有限公司 | A kind of teaching equipment |
| CN208636806U (en) * | 2018-07-26 | 2019-03-22 | 宁波极呈光电有限公司 | The electronic blackboard and system of one key breath screen |
| CN209641099U (en) * | 2018-07-19 | 2019-11-15 | 宁波极呈光电有限公司 | A kind of electronic blackboard and tutoring system |
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2021
- 2021-04-06 CN CN202110369196.1A patent/CN115171435B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781713A (en) * | 2016-12-16 | 2017-05-31 | 明基电通有限公司 | A kind of plug-type multimedia performance device |
| CN107170300A (en) * | 2017-07-17 | 2017-09-15 | 深圳中电数码显示有限公司 | A kind of teaching equipment |
| CN209641099U (en) * | 2018-07-19 | 2019-11-15 | 宁波极呈光电有限公司 | A kind of electronic blackboard and tutoring system |
| CN208636806U (en) * | 2018-07-26 | 2019-03-22 | 宁波极呈光电有限公司 | The electronic blackboard and system of one key breath screen |
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| CN115171435B (en) | 2024-02-23 |
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