CN115171435B - Electronic blackboard - Google Patents
Electronic blackboard Download PDFInfo
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- CN115171435B CN115171435B CN202110369196.1A CN202110369196A CN115171435B CN 115171435 B CN115171435 B CN 115171435B CN 202110369196 A CN202110369196 A CN 202110369196A CN 115171435 B CN115171435 B CN 115171435B
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- electromagnetic induction
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- 239000004020 conductor Substances 0.000 claims abstract description 137
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 74
- 230000003750 conditioning effect Effects 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000012776 electronic material Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 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
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The embodiment of the invention discloses an electronic blackboard, which relates to an energy-saving control technology of electronic equipment, and comprises the following steps: the auxiliary screen assembly, the main screen assembly and the electromagnetic induction device are used for generating magnetic force lines, 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 component is provided with a conductor structure, and when the auxiliary screen component slides, the conductor structure arranged on the blackboard can cut magnetic force lines generated by the electromagnetic induction device. When a user slides the auxiliary screen assembly inwards or closes the auxiliary screen assembly, a conductor on the blackboard slides across the electromagnetic induction device to cut magnetic field lines, and the control circuit can acquire an electric signal on the conductor structure, so that the energy consumption unit of the main screen assembly is closed through the control circuit.
Description
Technical Field
The present disclosure relates to control technology of electronic devices, and in particular, to an electronic blackboard.
Background
Currently, in some application scenes, a blackboard is required to be arranged, and content can be displayed in a mode of writing on the blackboard. Blackboard may be provided, for example, in a classroom, and may also be provided, for example, in some meeting rooms.
In the prior art, there is an electronic blackboard which has a conventional blackboard capable of writing contents and is further provided with a tablet capable of displaying electronic contents, because in the display process, besides the written contents, electronic contents are required to be displayed.
After the user closes the blackboard, the blackboard can shield the flat plate, and if the flat plate is in an open state, the user cannot easily perceive the flat plate. Therefore, when a user uses the electronic blackboard in the prior art, the user forgets to close the flat plate easily, so that the electric energy loss is serious, the flat plate is in an open state for a long time, and the service life of the blackboard is reduced.
Disclosure of Invention
The disclosure provides an electronic blackboard to solve the problems of the prior art that a flat plate in the electronic blackboard is not closed, so that electric energy loss is serious, and the service life of the blackboard is also reduced.
A first aspect of the present disclosure is to provide an electronic blackboard, including:
the device comprises a secondary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the secondary 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 force lines 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.
A second aspect of the present disclosure is to provide an electronic blackboard, including:
the device comprises a secondary screen assembly, a primary screen assembly and a conductor structure, wherein a control circuit is arranged in the primary screen assembly and is electrically connected with the conductor structure; the secondary screen assembly being slidable relative to the primary screen assembly;
an electromagnetic induction device for generating magnetic force lines is arranged on the auxiliary screen assembly; when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic force lines 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 provided by the present disclosure includes: the device comprises a main screen assembly, a secondary screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the secondary 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 force lines 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 cutting mode of 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 diagram of an electronic blackboard shown in an exemplary embodiment;
fig. 2 is a schematic structural view of an electronic blackboard according to an exemplary embodiment of the present application;
fig. 3 is a schematic diagram of a conductor structure according to an exemplary embodiment of the present application cutting magnetic lines of force generated by an electromagnetic induction device;
fig. 4 is a schematic structural view of an electronic blackboard according to an exemplary embodiment of the present application;
fig. 5 is a schematic structural view of an electromagnetic induction apparatus according to an exemplary embodiment of the present application;
fig. 6 is a schematic structural 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 diagram of an electronic blackboard shown in an exemplary embodiment.
As shown in fig. 1, the electronic blackboard includes a sub-screen assembly 11 and a main screen assembly 12. During the use, can write on the secondary screen assembly 11, can broadcast electronic document, slide, etc. electronic material through the main screen assembly 12. For example, the main screen assembly may be coupled to an electronic device through which electronic material is played on the main screen assembly.
As shown in fig. 1, after the main screen assembly is used, an on-off button on the main screen assembly may be clicked to close the main screen assembly.
However, in some cases, after the user has used the tablet, the secondary screen assembly may be slid so that the secondary screen assembly moves to an intermediate position, covering the primary screen assembly. However, in this case, the user cannot easily find that the main screen assembly is in the on state, which results in forgetting to turn off the main screen assembly.
In order to solve the technical problem, in the scheme that this application provided, set up conductor structure and electromagnetic induction device respectively on vice screen subassembly and main screen subassembly, when vice screen subassembly slides, the electromagnetic wire that conductor structure cutting electromagnetic induction device produced, and then can produce the signal of telecommunication. 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 in the present application includes: a secondary screen assembly 21, a primary screen assembly 22.
The electronic blackboard comprises a main screen assembly and a secondary screen assembly; the auxiliary screen assembly is arranged at the side of the main screen assembly through an auxiliary screen wall hanging structure; the main screen component can be an interactive flat board, and the auxiliary screen component can be a common blackboard.
Wherein the device in the main screen assembly 22 is provided with a control circuit 23, and the auxiliary screen assembly 21 can slide relative to the main screen assembly 22. For example, a rail may be provided on a fixing member that fixes the sub-screen assembly 21 and the main screen assembly 22, and the sub-screen assembly 21 may slide along the rail.
Specifically, 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 senses the 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 force lines. The electromagnetic induction device 25 can generate magnetic lines of force. In use, the electromagnetic induction device 25 may be fixed to a wall, or other stationary object to which an electronic blackboard is to be fixed, for example. 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, magnetic lines of force directed toward the iron block by the magnet are present.
When the sub-screen assembly 21 slides, the conductor structure 24 disposed on the sub-screen assembly 21 can cut magnetic lines of force generated by the electromagnetic induction device 25, so that 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 active state. And the control circuit 23 is connected to the conductor arrangement 24, the control circuit 23 is thus able to receive an electrical signal of the conductor arrangement 24.
Fig. 3 is a schematic diagram of a conductor structure according to an exemplary embodiment of the present application cutting magnetic lines of force generated by an electromagnetic induction device.
As shown in fig. 3, the electromagnetic induction device 25 can generate magnetic force lines shown as 31, and the conductor structure 24 cuts the magnetic force lines 31, so that electromotive force is generated in the conductor structure 24, and the control circuit 23 connected to the conductor structure 24 can sense the signal.
Specifically, the control circuit 23 may turn off the power supply of the main screen assembly after sensing the electrical signal of the conductor structure 24. For example, the communication relationship between the control circuit 23 and the power supply may be cut off, thereby turning off the main screen assembly 22.
If the magnetic force 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 drives the conductor structure 24 disposed thereon to move, so that the conductor structure 24 cuts the magnetic force lines generated by the electromagnetic induction device 25. In the process of cutting magnetic lines, an electric signal is generated in the conductor structure 24 and is transmitted to the control circuit 23, so that the control circuit 23 can close the power supply of the main screen assembly, and the problems that the main screen assembly is opened for a long time, the electric energy loss is serious and the service life of the blackboard is reduced are avoided.
The application provides an electronic blackboard, include: the device comprises a secondary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the secondary screen assembly can slide relative to the main screen assembly; the secondary screen component is provided with a conductor structure, and the control circuit is electrically connected with the conductor structure; when the main screen component is in an open state, if the auxiliary screen component slides, the conductor structure cuts magnetic force lines 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 the auxiliary screen subassembly through sliding body, can pass through this sliding motion of mode perception that conductor and electromagnetic induction device cut, and then close the power of main screen subassembly 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 may be an upper edge of the sub-screen assembly 21, and the fixture may be an object such as a wall.
The conductor structure provided on the sub-screen assembly 21 is capable of cutting magnetic lines of force generated by the electromagnetic induction device 25 when the sub-screen assembly 21 slides relative to the main screen assembly 22.
Fig. 4 is a schematic structural view of an electronic blackboard according to an exemplary embodiment of the present application.
As shown in fig. 4, in the electronic blackboard provided by the present application, two sub-screen assemblies are provided. 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, the user may push the first and second sub-screen assemblies 41 and 42 to both sides when the user desires to use the main screen assembly 22. Leaving the main screen assembly 22 exposed.
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 to the middle, so that the first sub-screen assembly 41 and the second sub-screen assembly 42 slide to the middle position, thereby facilitating the display of the writing content of the user. Meanwhile, the first and second sub-screen assemblies 41 and 42 may also cover the main screen assembly 22 when slid to the intermediate position.
In an alternative embodiment, the conductor structure may be provided on the first sub-screen assembly 41 or on the second sub-screen assembly 42.
If the conductor structure is disposed on the first sub-screen assembly 41, the conductor structure disposed on the first sub-screen assembly 41 can cut magnetic lines of force generated by the electromagnetic induction device 25 when the first sub-screen assembly 41 moves toward the middle. If the conductor structure is disposed on the second sub-screen assembly 41, the conductor structure disposed on the second sub-screen assembly 42 can cut magnetic lines of force generated by the electromagnetic induction device 25 when the second sub-screen assembly 42 moves to the middle.
With continued reference to fig. 4, when two secondary screen assemblies are provided, the electronic blackboard provided herein may also be provided with two conductor structures, such as a first conductor structure 43 and a second conductor structure 44. The first conductor structure 43 may be disposed on the first sub-screen assembly 41 and the second conductor structure 44 may be disposed on the second sub-screen assembly 42.
As the first sub-screen assembly 41 slides, the first conductor structure 43 provided on the first sub-screen assembly 41 also moves. As the second sub-screen assembly 42 slides, the second conductor structure 44 disposed on the second sub-screen assembly 42 also moves.
Specifically, as shown in fig. 4, in the electronic blackboard provided in the present application, two electromagnetic induction devices, such as a first electromagnetic induction device 45 and a second electromagnetic induction device 46, may also be provided.
Further, the first electromagnetic induction device 45 and the second electromagnetic induction device 46 may be respectively disposed on the fixture. The connection direction of the first electromagnetic induction device 45 and the second electromagnetic induction device 46 may be the same as the direction in which the conductor structure moves.
In practical application, when the first sub-screen assembly 41 slides, the first conductor structure 43 cuts the magnetic lines of force generated by the first electromagnetic induction device 45. When the second sub-screen assembly 42 slides, the second conductor structure 44 cuts the magnetic lines of force generated by the second electromagnetic induction device 46.
In an alternative embodiment, the first conductor arrangement 43, the second conductor arrangement 44 may be connected to the control circuit 23. When the first sub-screen assembly 41 and the second sub-screen assembly 42 slide, an electromotive force is generated in the first conductor structure 43 and the second conductor structure 44, so that the control circuit 23 senses an electrical signal generated by the first conductor structure 43 and the second conductor structure 44, and the control circuit 23 can receive the electrical signal.
The control circuit 23 may receive the electrical signals in the first conductor structure 43 and the second conductor structure 44, and may control the power of the main screen assembly 22 to be turned off after the control circuit 23 receives the electrical signals of the first conductor structure 43 and/or the second conductor structure 44.
In an alternative embodiment, the control circuit 23 may control the power to the main screen assembly 22 to be turned off upon receiving the electrical signals from the first conductor structure 43 and the second conductor structure 44. In this embodiment, the main screen assembly 22 can be closed again when both the first sub-screen assembly 41 and the second sub-screen assembly 42 are slid, thereby avoiding the case where the main screen assembly is closed by mistake.
Specifically, when the conductor structure and the electromagnetic induction device are disposed, the first conductor structure 43 may be made to cut the magnetic lines of force generated by the first electromagnetic induction device 45 when the first sub-screen assembly 41 slides to the intermediate position, and the second conductor structure 44 may be made to cut the magnetic lines of force generated by the second electromagnetic induction device 46 when the second sub-screen assembly 42 slides to the intermediate position.
In another alternative embodiment, when the first sub-screen assembly 41 slides, the first conductor structure 43 cuts 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 is sent to the control circuit 23.
When the second sub-screen assembly 42 slides, the second conductor structure 44 cuts the magnetic force lines generated by the second electromagnetic induction device 46, so that an electromotive force can be generated in the second conductor structure 44, and an electrical signal is sent to the control circuit 23.
Fig. 5 is a schematic structural diagram of an electromagnetic induction apparatus 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 piece 52 for guiding the direction of magnetic lines. In the electromagnetic induction device 50, magnetic lines of force directed to the iron piece 52 by the magnet 51 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 an electronic blackboard, the conductor structure can cut magnetic lines of force generated by the electromagnetic induction device. The moving direction of the conductor structure is perpendicular to the direction of the magnetic force lines.
For another example, when the first conductor structure, the second conductor structure, the first electromagnetic induction device and the second electromagnetic induction device are arranged in the electronic blackboard, the first conductor structure can cut the first magnetic force lines generated by the first electromagnetic induction device, and the second conductor structure can cut the second magnetic force lines generated by the second electromagnetic induction device. The moving direction of the first conductor structure is perpendicular to the direction of the first magnetic force line, and the moving direction of the second conductor structure is perpendicular 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 may be fixed to the main screen assembly 22 by the U-shaped frame 53.
Further, the U-shaped frame 53 has a first frame 531 and a second frame 532 opposite to each other. The first frame 531 and the second frame 532 are respectively provided with a magnet 51 for generating a magnetic field and an iron piece 52 for guiding the direction of magnetic lines.
In practical applications, the first frame 531 or the second frame 532 may be disposed on the fixture, for example, the hole 533 for mounting the screw may be disposed on the first frame 531, so that the electromagnetic induction device 50 may be fixed on the fixture by means of bolting.
Wherein, when the auxiliary screen assembly slides, the conductor structure arranged on the auxiliary screen assembly can slide into the groove 534 of the U-shaped frame 53. For example, the conductor structure 54 is disposed on the upper edge 55 of the secondary screen assembly, and when the secondary screen assembly is moved, the upper edge 52 of the secondary screen assembly communicates with the conductor structure 51 disposed so as to pass through the recess 534 of the U-shaped frame 53. And further causes the conductor structure 54 to cut the magnetic lines of force 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 control circuit 60 provided in the present application includes: a signal conditioning circuit 61 and a sensing circuit 62.
Wherein 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 electromotive force to further transmit an electrical 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 off of the main screen assembly based on the received electrical 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 conductor structure and the second conductor structure are provided, the signal conditioning circuit 61 transmits the first voltage signal to the sensing circuit 62 if it senses that an electrical signal is generated in the first conductor structure, and transmits the second voltage signal to the sensing circuit 62 if it senses that an electrical signal is generated in the second conductor structure. So that the induction circuit controls the power supply of the main screen assembly 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 an induction circuit according to an exemplary embodiment of the present application.
As shown in fig. 7, the sensing circuit 70 provided in the present application includes: a signal conversion circuit 71, a signal acquisition unit 72, and a control unit 73.
The signal conversion circuit 71 is connected to the signal conditioning circuit 61, and converts a voltage signal of the signal conditioning circuit into a digital signal. For example, if the signal conditioning circuit 61 senses that an electrical signal is generated in the first conductor structure, a first voltage signal may be sent to the signal conversion circuit 71, and if the signal conditioning circuit 61 senses that an electrical signal is generated in the second conductor structure, a second voltage signal may be sent to the signal conversion circuit 71.
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 the first digital signal after receiving the first voltage signal. After receiving the second voltage signal, the signal conversion circuit 71 may convert the second voltage signal into a second digital 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 the transmission signal to the control unit 73. For example, the transmission signal may be sent to the control unit 73 by an asynchronous transceiving transmitter. For example, if the signal conversion circuit 71 receives the first digital signal and the second digital signal, the signal conversion circuit 71 may send information for characterizing the sliding of the first sub-screen assembly and the sliding of the second sub-screen assembly to the control unit 73.
In practice, the control unit 73 may cut off the power of the main screen assembly according to the received transmission signal. For example, the power to the primary screen assembly may be turned off when information characterizing the sliding of the first secondary screen assembly and the sliding of the second secondary screen assembly is received simultaneously.
Wherein, the control unit is specifically used for: 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.
Fig. 8 is a schematic structural view of an electronic blackboard according to an exemplary embodiment of the present application.
As shown in fig. 8, the electronic blackboard provided in the present application includes:
a secondary screen assembly 81 and a primary screen assembly 82, wherein a control circuit 83 is arranged in the primary screen assembly 81, and the secondary screen assembly 81 can slide relative to the primary screen assembly 82;
the secondary screen assembly 81 is provided with electromagnetic induction means 83 for generating magnetic lines of force.
The electronic blackboard provided by the application is further provided with a conductor structure 84, for example, the conductor structure 84 can be fixed on a fixed object, and the control circuit 83 is electrically connected with the conductor structure 84;
when the main screen assembly 82 is in the open state, if the sub-screen assembly 81 slides, the conductor structure 84 cuts magnetic lines of force 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 in this embodiment is similar to that of 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 of force 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 should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are merely used for convenience in describing the various elements 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 defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
In the present invention, unless explicitly stated otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as fixed connections, as removable connections, as integral forms, as mechanical connections, as electrical connections, or as communicable with each other; either directly or indirectly, through intermediaries, or both, in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (11)
1. An electronic blackboard, characterized by comprising:
the device comprises a secondary screen assembly, a main screen assembly and an electromagnetic induction device, wherein a control circuit is arranged in the main screen assembly, and the secondary 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 force lines 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;
the control circuit comprises a signal conditioning circuit and an induction 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 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 transmits an electric signal to the signal conditioning circuit;
the signal conditioning circuit transmits the received electric signal to the induction circuit; the induction circuit controls the power supply of the main screen assembly to be turned off according to the received 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. An electronic blackboard according to claim 1, characterized in that two of the secondary screen assemblies are provided;
the first auxiliary screen assembly and the second auxiliary screen assembly are respectively positioned at two sides of the main screen assembly; the first auxiliary screen assembly and the second auxiliary screen assembly can slide relative to the main screen assembly respectively.
4. An electronic blackboard according to claim 3, characterised in that the conductor structure is located on the first sub-screen assembly or the conductor structure is located on the second sub-screen assembly.
5. An electronic blackboard according to claim 3, characterized in that two of said conductor structures, two of said electromagnetic induction means are provided;
wherein a first conductor structure is disposed on the first sub-screen assembly and a second conductor structure is disposed on the second sub-screen assembly;
the first conductor structure and the second conductor structure are respectively connected with the control circuit;
if the first auxiliary screen component slides relative to the main screen component, the first conductor cuts magnetic force lines generated by a first electromagnetic induction device so that the first conductor structure transmits an electric signal to the control circuit;
if the second auxiliary screen component slides relative to the main screen component, the second conductor cuts magnetic force lines generated by the second electromagnetic induction device so that the second conductor structure transmits an electric signal to the control circuit.
6. An electronic blackboard according to any one of claims 1-5, characterized in that the electromagnetic induction means includes a magnet for generating a magnetic field, an iron block for guiding the direction of the magnetic lines of force.
7. The electronic blackboard according to claim 6, wherein the moving direction of the conductor structure provided on the sub-screen assembly is perpendicular to the direction in which the magnet points to the iron piece when the sub-screen assembly is moved.
8. The electronic blackboard according to claim 6, wherein the electromagnetic induction device further comprises a U-shaped frame, wherein two opposite first and second frames of the U-shaped frame are respectively provided with a magnet for generating a magnetic field and an iron block for guiding the direction of magnetic lines;
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 of claim 8, 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 a 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 assembly according to the transmission signal.
10. The electronic blackboard according to claim 9, characterized in that said 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.
11. An electronic blackboard, characterized by comprising:
the device comprises a secondary screen assembly, a primary screen assembly and a conductor structure, wherein a control circuit is arranged in the primary screen assembly and is electrically connected with the conductor structure; the secondary screen assembly being slidable relative to the primary screen assembly;
an electromagnetic induction device for generating magnetic force lines is arranged on the auxiliary screen assembly;
when the main screen assembly is in an open state, if the auxiliary screen assembly slides, the conductor structure cuts magnetic force lines generated by the electromagnetic induction device and transmits an electric signal to the control circuit; 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 control circuit comprises a signal conditioning circuit and an induction 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 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 transmits an electric signal to the signal conditioning circuit;
the signal conditioning circuit transmits the received electric signal to the induction circuit; the induction circuit controls the power supply of the main screen assembly to be turned off according to the received electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN115171435B true CN115171435B (en) | 2024-02-23 |
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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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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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| CN115171435A (en) | 2022-10-11 |
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