CN217008430U - Informationized teaching device - Google Patents
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- CN217008430U CN217008430U CN202220303876.3U CN202220303876U CN217008430U CN 217008430 U CN217008430 U CN 217008430U CN 202220303876 U CN202220303876 U CN 202220303876U CN 217008430 U CN217008430 U CN 217008430U
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- 230000007246 mechanism Effects 0.000 claims abstract description 91
- 230000009471 action Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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Abstract
An information teaching device comprises a display screen, an electronic writing board, a supporting piece, a clamping mechanism and a signal connector; a first sliding groove with an opening is formed in the first side of the display screen, and a first groove is formed in the back of the display screen; the electronic writing board is slidably arranged in the first sliding groove, can move along the length direction of the first sliding groove and covers the opening of the first sliding groove; the supporting piece is rotatably arranged in the first groove, and the supporting piece can be accommodated in the first groove by rotating the supporting piece; the back of the supporting piece is provided with a second groove, the clamping mechanism is rotatably arranged in the second groove, and the clamping mechanism can be accommodated in the second groove by rotating the clamping mechanism; the signal connector comprises a wireless signal module and a wired signal module; and the wireless signal module and the wired signal module are both arranged on the second side of the display screen.
Description
Technical Field
The utility model relates to the technical field of informatization teaching, in particular to an informatization teaching device.
Background
Teaching informatization means that information technology means is applied in teaching to digitalize all links of teaching, thereby improving teaching quality and efficiency.
With the development of the times, people pay more and more attention to information-based teaching, and various information-based teaching devices are continuously developed and innovated; at the present stage, an information-based teaching mode basically adopts a mode of signal connection between a master machine and a plurality of submachine machines for teaching, wherein the submachine machines basically belong to desktop computers, and are not convenient to move, carry and support and fix.
Therefore, there is a need for an improvement to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the problems, the utility model provides an information teaching device which can be conveniently carried, supported and fixed.
(II) technical scheme
In order to achieve the purpose, the utility model provides the following technical scheme:
an information teaching device comprises a display screen, an electronic writing board, a supporting piece, a clamping mechanism and a signal connector; a first sliding groove with an opening is formed in the first side of the display screen, and a first groove is formed in the back of the display screen; the electronic writing board is slidably arranged in the first sliding groove, can move along the length direction of the first sliding groove and covers the opening of the first sliding groove; the supporting piece is rotatably arranged in the first groove, and the supporting piece can be received in the first groove by rotating the supporting piece; the back of the supporting piece is provided with a second groove, the clamping mechanism is rotatably arranged in the second groove, and the clamping mechanism can be accommodated in the second groove by rotating the clamping mechanism; the signal connector comprises a wireless signal module and a wired signal module; and the wireless signal module and the wired signal module are both arranged on the second side of the display screen.
Preferably, the locking device comprises a first locking mechanism and a second locking mechanism; the first locking mechanism is arranged at the rotating connection position of the supporting piece and the first groove, the second locking mechanism is arranged at the rotating connection position of the clamping mechanism and the second groove, and the supporting piece and the clamping mechanism can be rotated to different angles and fixed at the different angles through the first locking mechanism and the second locking mechanism respectively.
Preferably, the first locking mechanism comprises an elastic telescopic rod and a push rod, one side of the supporting piece is provided with a mounting groove with an opening, the display screen is provided with a through groove and a clamping groove, one end of the clamping groove is communicated with the through groove, and the other end of the clamping groove is communicated with the first groove; the supporting piece is rotatably arranged in the first groove, so that the through groove, the clamping groove and the mounting groove are sequentially and coaxially communicated; the first end of the elastic telescopic rod is connected with the bottom of the mounting groove, the second end of the elastic telescopic rod penetrates through the mounting groove and extends into the clamping groove, a clamping block matched with the clamping groove is arranged at the second end of the elastic telescopic rod, the elastic telescopic rod is prevented from rotating through the clamping of the clamping groove and the clamping block, and further the supporting piece is prevented from rotating; the push rod is slidably arranged in the through groove, one end of the push rod penetrates through the through groove and extends to the outside, the other end of the push rod is connected with the second end of the elastic telescopic rod, the clamping block can be pushed to be separated from the clamping groove by pressing the push rod, and the clamping state of the clamping block and the clamping groove is relieved; the first locking mechanism and the second locking mechanism are identical in structure.
Preferably, the clamping mechanism comprises a connecting rod, a first clamping piece, a second clamping piece and an elastic piece; the first clamping piece and the second clamping piece are respectively arranged at the top and the bottom of the connecting rod, one end of the elastic piece is connected with the bottom of the first clamping piece, the other end of the elastic piece is connected with the top of the second clamping piece, and the first clamping piece and the second clamping piece can move away from or close to each other under the elastic action of the elastic piece.
Preferably, the first clamping piece II and the second clamping piece are provided with bumps on two sides.
Preferably, still inhale the mechanism including magnetism, the mechanism is inhaled including first magnetism and inhale the piece and the second magnetism is inhaled the piece, first magnetism inhale the piece install in the opening part of first spout, the second magnetism inhale the piece install in the electron clipboard is kept away from first spout open-ended one end, and first magnetism inhale the piece with the second magnetism inhale the piece can attract each other.
Preferably, one end of the supporting member is provided with a plurality of anti-skid blocks, and the anti-skid blocks are uniformly arranged on one end of the supporting member in a ring shape.
Preferably, the display screen further comprises a clamping plate, a second sliding groove is formed in the back of the display screen, the clamping plate is slidably arranged in the second sliding groove, and the clamping plate can be accommodated in the second sliding groove by moving along the length direction of the second sliding groove.
(III) advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
an information teaching device comprises a display screen, an electronic writing board, a supporting piece, a clamping mechanism and a signal connector; a first chute with an opening is arranged at the first side of the display screen, and a first groove is arranged at the back of the display screen; the electronic writing board is slidably arranged in the first sliding groove, can move along the length direction of the first sliding groove and covers the opening of the first sliding groove; the supporting piece is rotatably arranged in the first groove, and the supporting piece can be accommodated in the first groove by rotating the supporting piece; the back of the supporting piece is provided with a second groove, the clamping mechanism is rotatably arranged in the second groove, and the clamping mechanism can be accommodated in the second groove by rotating the clamping mechanism; the signal connector comprises a wireless signal module and a wired signal module; the wireless signal module and the wired signal module are both arranged on the second side of the display screen; compared with the prior art, the information-based teaching device has the advantages that the design that the electronic writing board, the supporting piece and the clamping mechanism can be accommodated on the display screen is adopted, so that the information-based teaching device is small in size and convenient to carry; and through the design of the supporting piece and the clamping mechanism, the informatization teaching device can be supported and fixed on a table top or clamped and fixed on the table top.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model in any way:
FIG. 1 shows a schematic view of the overall structure of the present invention in a folded state;
FIG. 2 shows a schematic view of the overall structure of the present invention in an expanded state;
FIG. 3 shows a schematic view of the support of the present invention in use;
FIG. 4 is a schematic view showing a state of use of the clamping mechanism of the present invention;
FIG. 5 is a schematic view showing a state in which the support and the chucking mechanism of the present invention are used simultaneously;
fig. 6 is a schematic view showing a locking state of the first locking mechanism of the present invention to the support member;
FIG. 7 shows a schematic view of the structure of the display screen of the present invention;
FIG. 8 shows a schematic structural view of the support of the present invention;
FIG. 9 shows a schematic structural view of the clamping mechanism of the present invention;
fig. 10 shows a mechanical schematic of the first locking mechanism of the present invention.
In the figure: the display screen, 10 first spout, 11 first recess, 12 logical grooves, 13 draw-in grooves, 14 second spout, 2 electronic writing boards, 3 support piece, 30 second recess, 31 mounting groove, 4 fixture, 40 connecting rods, 41 first holder, 42 second holder, 43 elastic component, 44 lugs, 5 signal connector, 50 wireless signal module, 51 wired signal module, 6 locking device, 60 first locking mechanism, 600 elastic telescopic rod, 600a fixture block, 601 push rod, 61 second locking mechanism, 7 fixture plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-10, an information-based teaching device includes a display screen 1, an electronic writing board 2, a supporting member 3, a clamping mechanism 4 and a signal connector 5; a first chute 10 with an opening design is arranged at the first side of the display screen 1, and a first groove 11 is arranged at the back of the display screen 1; the electronic writing board 2 is slidably disposed in the first sliding slot 10, and the electronic writing board 2 can move along the length direction of the first sliding slot 10 and cover the opening of the first sliding slot 10; the support 3 is rotatably arranged in the first groove 11, and the support 3 can be received in the first groove 11 by rotating the support 3; the back of the support 3 is provided with a second groove 30, the clamping mechanism 4 is rotatably arranged in the second groove 30, and the clamping mechanism 4 can be accommodated in the second groove 30 by rotating the clamping mechanism 4; the signal connector 5 includes a wireless signal module 50 and a wired signal module 51; and the wireless signal module 50 and the wired signal module 51 are both disposed at a second side of the display screen 1.
Specifically, when the information-based teaching device is in an initial state, the electronic writing board 2 is accommodated in the first chute 10, the support member 3 is accommodated in the first groove 11, and the clamping mechanism 4 is accommodated in the second groove 30; when the user uses this information-based teaching device to carry out the teaching activity, can support display screen 1 on the desktop earlier to display screen 1's support mode possesses two kinds of situations: firstly, if a user needs to use the support piece 3 to support and fix the information teaching device on a table surface, the support piece 3 is rotated to enable the support piece 3 to be separated from the first groove 11, and the support piece 3 and the display screen 1 form a triangular support structure to fix the information teaching device; secondly, if a user needs to use the clamping mechanism 4 to clamp and fix the edge of the desktop, the clamping mechanism 4 is rotated to enable the clamping mechanism 4 to be separated from the second groove 30, and the information-based teaching device can be fixed by the clamping mechanism 4 and the display screen 1 forming an included angle; then, the electronic writing board 2 is moved along the length direction of the first sliding groove 10, so that the electronic writing board 2 is separated from the first sliding groove 10 and extends out to the outside for writing; finally, the signal connector 5 is connected with corresponding mother machine teaching equipment in a signal mode, and then information teaching activities can be carried out; when a user needs to carry the information-based teaching device, the information-based teaching device is switched to be in an initial state, so that the user can carry the information-based teaching device conveniently.
It should be noted that the rotation angle of the supporting member 3 or the clamping mechanism 4 can be adjusted according to the user's own requirements, and the rotation adjustment of the supporting member 3 and the clamping mechanism 4 can be performed simultaneously, i.e. after the clamping mechanism 4 is used for clamping and fixing the edge of the desktop, the inclination angle of the display screen 1 can be adjusted by rotating the supporting member 3, and a comfortable use angle can be achieved; it is also noted that the electronic writing board 2 is equipped with a corresponding electronic pen for use, and the electronic pen is receivable to be attached to one side of the electronic writing board 2.
Further, in order to avoid the angle deviation of the supporting member 3 or the clamping mechanism 4 caused by the collision after the supporting member 3 or the clamping mechanism 4 rotates to the required angle, as shown in fig. 1 to 5, the present invention further comprises a locking device 6, wherein the locking device 6 comprises a first locking mechanism 60 and a second locking mechanism 61; the first locking mechanism 60 is installed at the rotary connection position of the support member 3 and the first groove 11, the second locking mechanism 61 is installed at the rotary connection position of the clamping mechanism 4 and the second groove 30, and the support member 3 and the clamping mechanism 4 can be respectively rotated to different angles and fixed at the different angles through the first locking mechanism 60 and the second locking mechanism 61.
Further, as shown in fig. 6 to fig. 10, in the present invention, the first locking mechanism 60 includes an elastic telescopic rod 600 and a push rod 601, one side of the supporting member 3 is provided with an installation groove 31 with an opening, the display screen 1 is provided with a through groove 12 and a clamping groove 13, one end of the clamping groove 13 is communicated with the through groove 12, and the other end of the clamping groove 13 is communicated with the first groove 11; the supporting piece 3 is rotatably arranged in the first groove 11, so that the through groove 12, the clamping groove 13 and the mounting groove 31 are sequentially and coaxially communicated; the first end of the elastic telescopic rod 600 is connected with the bottom of the mounting groove 31, the second end of the elastic telescopic rod 600 penetrates through the mounting groove 31 and extends into the clamping groove 13, a clamping block 600a matched with the clamping groove 13 is arranged at the second end of the elastic telescopic rod 600, the elastic telescopic rod 600 is prevented from rotating through mutual clamping of the clamping groove 13 and the clamping block 600a, and then the support member 3 is prevented from rotating; the push rod 601 is slidably installed in the through groove 12, one end of the push rod 601 penetrates through the through groove 12 and extends to the outside, the other end of the push rod 601 is connected with the second end of the elastic telescopic rod 600, the clamping block 600a can be pushed to be separated from the clamping groove 13 by pressing the push rod 601, and the clamping state of the clamping block 600a and the clamping groove 13 is further relieved; the first locking mechanism 60 and the second locking mechanism 61 are identical in structure.
Specifically, since the first locking mechanism 60 and the second locking mechanism 61 have the same structure, and the locking principle and the locking process of the first locking mechanism 60 to the supporting member 3 are the same as those of the second locking mechanism 61 to the clamping mechanism 4, only the locking principle and the locking process of the first locking mechanism 60 will be described in the present invention, and the locking principle and the locking process of the second locking mechanism 61 will be omitted.
When the support 3 does not need to rotate, the first locking mechanism 60 is in an initial state that the fixture block 600a and the fixture groove 13 are mutually clamped and locked, and the push rod 601 penetrates through the through groove 12 and extends out to the outside; when support piece 3 needs to rotate, the user can press push rod 601 earlier, make push rod 601 remove along the length direction who leads to groove 12, and then make push rod 601 extrusion elasticity telescopic link 600, thereby make elasticity telescopic link 600 compression energy storage, and fixture block 600a breaks away from draw-in groove 13, then, rotate support piece 3 to required angle, finally, loosen push rod 601, make push rod 601 remove to the external world along the length direction who leads to groove 12, and then make elasticity telescopic link 600 lose the squeezing action, thereby make elasticity telescopic link 600 release, and fixture block 600a stretch into to draw-in groove 13 joint, in order to prevent support piece 3 from rotating, reach the purpose of fixed support piece 3 to required angle.
Further, as shown in fig. 1 to 9, in the present invention, the clamping mechanism 4 includes a link 40, a first clamping member 41, a second clamping member 42, and an elastic member 43; the first clamping member 41 and the second clamping member 42 are respectively installed at the top and the bottom of the connecting rod 40, one end of the elastic member 43 is connected with the bottom of the first clamping member 41, the other end of the elastic member 43 is connected with the top of the second clamping member 42, and the first clamping member 41 and the second clamping member 42 can move away from or close to each other through the elastic action of the elastic member 43.
Specifically, when the clamping mechanism 4 is not in the clamping state, the first clamping member 41 and the second clamping member 42 are in a state of being attached to each other; when the clamping mechanism 4 needs to be clamped on the edge of the desktop, a user can push the first clamping member 41 and the second clamping member 42 first, so that the first clamping member 41 and the second clamping member 42 move away from each other to generate a gap, meanwhile, the spring stretches to store energy, then the first clamping member 41 and the second clamping member 42 are moved to enable the edge of the desktop to extend into the gap, finally, the first clamping member 41 and the second clamping member 42 are loosened, the spring releases energy, and then the first clamping member 41 and the second clamping member 42 respectively generate extrusion force on the top and the bottom of the edge of the desktop, so that the purpose of clamping on the desktop is achieved.
Further, in order to facilitate pushing the first clamping member 41 and the second clamping member 42, and further to make the first clamping member 41 and the second clamping member 42 move away from each other and generate a gap, as shown in fig. 9, in the present invention, two sides of the first clamping member 41 and the second clamping member 42 are both provided with a protrusion 44.
Further, in order to avoid the situation that the information teaching device slides out of the electronic writing board 2 from the first sliding groove 10 due to the self-gravity of the electronic writing board 2 in the moving process, as shown in fig. 1-2, the information teaching device further comprises a magnetic attraction mechanism, the magnetic attraction mechanism comprises a first magnetic attraction piece and a second magnetic attraction piece, the first magnetic attraction piece is installed at the opening of the first sliding groove 10, the second magnetic attraction piece is installed at one end, far away from the opening of the first sliding groove 10, of the electronic writing board 2, and the first magnetic attraction piece and the second magnetic attraction piece can attract each other.
Furthermore, in order to improve the anti-slip capability of the supporting member 3 when the supporting member is supported and fixed on the desktop, as shown in fig. 2-fig. 3, in the present invention, one end of the supporting member 3 is provided with a plurality of anti-slip blocks, and the plurality of anti-slip blocks are uniformly arranged on one end of the supporting member 3 in a ring shape, so that the friction between the supporting member 3 and the desktop can be increased through the anti-slip blocks, and the anti-slip capability of the supporting member 3 is further improved.
Further, as shown in fig. 1 to 5, the present invention further includes a clamping plate 7, a second sliding groove 14 is further disposed on the back of the display screen 1, the clamping plate 7 is slidably disposed in the second sliding groove 14, and the clamping plate 7 can be accommodated in the second sliding groove 14 by moving the clamping plate 7 along the length direction of the second sliding groove 14.
Specifically, when a user needs to record a note, the clamping plate 7 can be moved along the length direction of the second chute 14, so that the clamping plate 7 is separated from the second chute 14 and extends out to the outside for use; when the user need not the record pen note, can follow the length direction removal grip block 7 that can follow second spout 14, and then make grip block 7 stretch into and be accomodate and place in second spout 14.
It will also be appreciated that although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
It will also be appreciated that although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An information teaching device is characterized by comprising a display screen (1), an electronic writing board (2), a supporting piece (3), a clamping mechanism (4) and a signal connector (5);
a first sliding groove (10) with an opening is formed in the first side of the display screen (1), and a first groove (11) is formed in the back of the display screen (1);
the electronic writing board (2) is slidably arranged in the first sliding chute (10), and the electronic writing board (2) can move along the length direction of the first sliding chute (10) and cover the opening of the first sliding chute (10);
the support member (3) is rotatably arranged in the first groove (11), and the support member (3) can be received in the first groove (11) by rotating the support member (3);
a second groove (30) is formed in the back of the support member (3), the clamping mechanism (4) is rotatably mounted in the second groove (30), and the clamping mechanism (4) can be accommodated in the second groove (30) by rotating the clamping mechanism (4);
the signal connector (5) comprises a wireless signal module (50) and a wired signal module (51); and the wireless signal module (50) and the wired signal module (51) are both arranged on the second side of the display screen (1).
2. An informatization teaching device according to claim 1, further comprising a locking device (6), wherein the locking device (6) comprises a first locking mechanism (60) and a second locking mechanism (61);
the first locking mechanism (60) is arranged at the rotary connection position of the support piece (3) and the first groove (11), the second locking mechanism (61) is arranged at the rotary connection position of the clamping mechanism (4) and the second groove (30), and the support piece (3) and the clamping mechanism (4) can be respectively rotated to different angles through the first locking mechanism (60) and the second locking mechanism (61) and fixed at the different angles.
3. The information-based teaching device according to claim 2, wherein the first locking mechanism (60) comprises an elastic telescopic rod (600) and a push rod (601), one side of the support member (3) is provided with an open mounting groove (31), the display screen (1) is provided with a through groove (12) and a clamping groove (13), one end of the clamping groove (13) is communicated with the through groove (12), and the other end of the clamping groove (13) is communicated with the first groove (11);
the supporting piece (3) is rotatably arranged in the first groove (11) so that the through groove (12), the clamping groove (13) and the mounting groove (31) are sequentially and coaxially communicated;
the first end of the elastic telescopic rod (600) is connected with the bottom of the mounting groove (31), the second end of the elastic telescopic rod (600) penetrates through the mounting groove (31) and extends into the clamping groove (13), a clamping block (600a) matched with the clamping groove (13) is arranged at the second end of the elastic telescopic rod (600), the elastic telescopic rod (600) is prevented from rotating through mutual clamping of the clamping groove (13) and the clamping block (600a), and then the supporting piece (3) is prevented from rotating;
the push rod (601) is slidably mounted in the through groove (12), one end of the push rod (601) penetrates through the through groove (12) and extends to the outside, the other end of the push rod (601) is connected with the second end of the elastic telescopic rod (600), the push rod (601) is pressed to push the clamping block (600a) to be separated from the clamping groove (13), and the clamping state of the clamping block (600a) and the clamping groove (13) is relieved;
the first locking mechanism (60) and the second locking mechanism (61) are identical in structure.
4. An informatization teaching device according to claim 1, characterized in that the clamping mechanism (4) comprises a connecting rod (40), a first clamping member (41), a second clamping member (42) and an elastic member (43);
the first clamping piece (41) and the second clamping piece (42) are respectively arranged at the top and the bottom of the connecting rod (40), one end of the elastic piece (43) is connected with the bottom of the first clamping piece (41), the other end of the elastic piece (43) is connected with the top of the second clamping piece (42), and the first clamping piece (41) and the second clamping piece (42) can move away from or close to each other under the elastic action of the elastic piece (43).
5. An informatization teaching device according to claim 4, characterized in that the two sides of the first clamping member (41) and the second clamping member (42) are provided with projections (44).
6. The information-based teaching device according to claim 1, further comprising a magnetic attraction mechanism, wherein the magnetic attraction mechanism comprises a first magnetic attraction member and a second magnetic attraction member, the first magnetic attraction member is installed at an opening of the first sliding groove (10), the second magnetic attraction member is installed at an end of the electronic writing board (2) away from the opening of the first sliding groove (10), and the first magnetic attraction member and the second magnetic attraction member can attract each other.
7. An information-based teaching device according to claim 1, wherein one end of the supporting member (3) is provided with a plurality of anti-slip blocks, and the anti-slip blocks are uniformly arranged on one end of the supporting member (3) in a ring shape.
8. The information-based teaching device according to claim 1, further comprising a clamping plate (7), wherein a second sliding groove (14) is further formed in the back of the display screen (1), the clamping plate (7) is slidably disposed in the second sliding groove (14), and the clamping plate (7) can be accommodated in the second sliding groove (14) by moving the clamping plate (7) along the length direction of the second sliding groove (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202220303876.3U CN217008430U (en) | 2022-02-16 | 2022-02-16 | Informationized teaching device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202220303876.3U CN217008430U (en) | 2022-02-16 | 2022-02-16 | Informationized teaching device |
Publications (1)
Publication Number | Publication Date |
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CN217008430U true CN217008430U (en) | 2022-07-19 |
Family
ID=82392988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202220303876.3U Expired - Fee Related CN217008430U (en) | 2022-02-16 | 2022-02-16 | Informationized teaching device |
Country Status (1)
Country | Link |
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CN (1) | CN217008430U (en) |
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2022
- 2022-02-16 CN CN202220303876.3U patent/CN217008430U/en not_active Expired - Fee Related
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220719 |
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