CN112315188A - Teaching aid - Google Patents
Teaching aid Download PDFInfo
- Publication number
- CN112315188A CN112315188A CN202011047522.9A CN202011047522A CN112315188A CN 112315188 A CN112315188 A CN 112315188A CN 202011047522 A CN202011047522 A CN 202011047522A CN 112315188 A CN112315188 A CN 112315188A
- Authority
- CN
- China
- Prior art keywords
- fixedly arranged
- writing board
- platform
- side wall
- sliding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/10—Reading-desks; Lecterns; Pulpits, i.e. free-standing characterised by association with auxiliary devices, e.g. paper clamps, line indicators
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/06—Reading-desks; Lecterns; Pulpits, i.e. free-standing with adjustable top leaf
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B21/00—Tables or desks for office equipment, e.g. typewriters, keyboards
- A47B21/007—Tables or desks for office equipment, e.g. typewriters, keyboards with under-desk displays, e.g. displays being viewable through a transparent working surface of the table or desk
- A47B21/0073—Tables or desks for office equipment, e.g. typewriters, keyboards with under-desk displays, e.g. displays being viewable through a transparent working surface of the table or desk liftable above the desk top
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B95/00—Fittings for furniture
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a teaching aid, and relates to the technical field of teaching equipment; an electric push rod is vertically and fixedly arranged on the inner bottom surface of the storage cabinet, and the upper end of the electric push rod is fixedly connected with an adjusting plate; a rotary seat is fixedly embedded in the middle of the upper side face of the support frame, a rotary frame is connected to the upper portion of the rotary seat, a writing board is arranged on the front side of the rotary frame, second sliding blocks are symmetrically and fixedly arranged on the left side and the right side of the rear side wall of the writing board, and the second sliding blocks are arranged on a second sliding rail and a third sliding rail in corresponding positions in a sliding mode; equidistant fixed several electro-magnet that is provided with on the bottom surface of fixed plate, the fixed iron sheet that is provided with on the last side of clipboard, and electro-magnet and iron sheet attract the setting mutually, with the podium, the desktop integration that writes panel and writing in the inside of a device, make things convenient for the teacher to use, simultaneously, the teacher can face and carry out the blackboard writing to the educated person, and can closely show for the educated person more.
Description
Technical Field
The invention relates to the technical field of teaching equipment, in particular to a teaching aid.
Background
Teaching aid among the prior art is the podium, and the desktop detached design of writing panel and work when writing content on writing the panel, is back to the educator, can't face the educator, writes the fixed of panel, can't give the educator with the show of the more recent distance of content, awaits urgent need the improvement.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a teaching tool which is simple in structure, reasonable in design and convenient to use.
In order to achieve the purpose, the invention adopts the technical scheme that: it comprises a platform, a drawer, a storage cabinet and a cabinet door; a plurality of drawers are movably inserted into the left side of the bottom of the platform, a storage cabinet is fixedly arranged on the right side of the bottom of the platform, and a cabinet door is rotatably arranged on an opening end on the front side of the storage cabinet through a hinge; the device also comprises a rotating frame, a supporting frame, a first sliding rail, a second sliding rail, a driving motor, an electric push rod and an adjusting plate; a plurality of first sliding rails are symmetrically and fixedly arranged on the left side wall and the right side wall of the platform, first sliding blocks are arranged on the first sliding rails in a sliding manner, the supporting frame is arranged in an inverted U shape, the left vertical end and the right vertical end of the supporting frame are respectively fixed on the first sliding blocks on the left side and the right side, the rear sides of the left side wall and the right side wall of the platform are fixedly provided with driving motors through motor supports, the output ends of the driving motors are fixedly connected with lead screws, and the left vertical end and the right vertical end of the supporting frame are respectively fixedly connected with nuts which are sleeved on the lead screws; an electric push rod is vertically and fixedly arranged on the inner bottom surface of the storage cabinet, an adjusting plate is fixedly connected to the upper end of the electric push rod, a through hole is formed in the upper side surface of the platform on the upper side of the storage cabinet, a placing groove is formed in the platform on the left side of the through hole, a baffle is movably inserted in the placing groove, and the baffle is matched with the through hole; a rotating seat is fixedly embedded in the middle of the upper side face of the support frame, a rotating frame is connected to the upper portion of the rotating seat, second sliding rails are symmetrically and fixedly arranged on the left side and the right side of the front side wall of the support frame, third sliding rails are symmetrically and fixedly arranged on the left side and the right side of the front side wall of the rotating frame, and the second sliding rails are matched with the third sliding rails; a writing board is arranged on the front side of the rotating frame, second sliding blocks are symmetrically and fixedly arranged on the left side and the right side of the rear side wall of the writing board, and the second sliding blocks are arranged on a second sliding rail and a third sliding rail in corresponding positions in a sliding manner; a fixed plate is fixedly arranged on the front side wall of the rotating frame on the upper side of the writing board, a plurality of electromagnets are fixedly arranged on the bottom surface of the fixed plate at equal intervals, an iron sheet is fixedly arranged on the upper side surface of the writing board, and the electromagnets and the iron sheet are attracted; handles are symmetrically and fixedly arranged on the left side wall and the right side wall of the writing board;
the driving motor, the electric push rod and the electromagnet are all connected with an external power supply.
Furthermore, a buckle groove is formed in the right side of the upper side face of the baffle; the teacher realizes the switch of baffle through the catching groove.
Furthermore, limit grooves are symmetrically formed in the upper side surfaces of the support frames on the left side and the right side of the rotating seat, limit rods are fixedly arranged on the bottom surface of the rotating seat, and the limit rods are movably inserted into the limit grooves; elastic clamping blocks are symmetrically and fixedly arranged on the left side wall and the right side wall of the front end and the rear end of the limiting groove; when the limiting rod is movably clamped in the limiting groove in the middle of the elastic clamping block, the rotating frame and the supporting piece are arranged in parallel.
Furthermore, a flange plate is fixedly arranged on the front side of the upper side surface of the platform, the flange plate is of a semicircular structure, and the flange plate and the upper side surface of the platform are of an integrated structure; when a teacher speaks, the teacher sits between the flange plates on the left side and the right side, so that the arms can be placed conveniently, and meanwhile, the office area is increased.
Furthermore, fixing seats are symmetrically and fixedly arranged on the left side and the right side of the upper side surface of the adjusting plate, and the cross sections of the fixing seats are arranged in an inverted L shape; the base of the computer display is clamped between the fixing seats on the left side and the fixing seats on the right side, so that the stability of the computer display is improved.
Furthermore, a limiting plate is fixedly arranged on the front side wall of the support frame at the lower side of the third slide rail; when the writing board moves to the third sliding rail, the limiting plate limits the lowest side stroke of the writing board, and at the moment, a teacher can conveniently write on the writing board.
The working principle of the invention is as follows: when a teacher does teaching, the teacher sits at the front side of the platform, the computer display is placed on the supporting plate, when data searching is needed, the electric push rod and the baffle are opened, the electric push rod extends to drive the adjusting plate to ascend, so that the computer display is exposed out of the upper side face of the platform, and similarly, when the teacher does not use a computer, the electric push rod is shortened, and the computer display is stored in the storage cabinet; when the writing on the blackboard is needed, the writing board is moved downwards through the handle, the second sliding block slides to the third sliding rail through the second sliding rail, then the teacher writes on the blackboard, after the writing on the blackboard is finished, the writing board is moved upwards, the electromagnet and the iron sheet are attracted, the position of the writing board is fixed, and the rotating frame is rotated to display the writing board for the students to watch; then open driving motor, driving motor drives the lead screw and rotates to drive the support frame through a slider rearward movement on a slide rail, make the writing board body student more closely.
After adopting the structure, the invention has the beneficial effects that:
1. the platform, the writing board and the office desk top are integrated in one device, so that a teacher can use the device conveniently;
2. the teacher can write on the board by facing the educated person, and the teacher can display the board to students by rotating the rotating frame through the rotating seat after writing on the writing board;
3. the driving motor adjusts the position of the support frame on the first sliding rail, so that the writing board can be displayed to an educated person in a short distance;
4. computer display can accomodate in the inside of cabinet, and when needing to use, can stretch out the podium and go up the side, makes things convenient for the teacher to operate more.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is an enlarged view of a portion B in fig. 1.
Fig. 4 is an enlarged view of a portion C in fig. 1.
Fig. 5 is a schematic view of the internal structure of the platform of the present invention.
Description of reference numerals:
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 5, the technical solution adopted by the present embodiment is: it comprises a platform 1, a drawer 2, a storage cabinet 3 and a cabinet door 4; three drawers 2 are movably inserted into the left side of the bottom of the platform 1, a storage cabinet 3 is fixedly arranged on the right side of the bottom of the platform 1 through bolts, a cabinet door 4 is rotatably arranged at an opening end on the front side of the storage cabinet 3 through a hinge, and the cabinet door 4 and the front side wall of each drawer 2 are provided with a handle; a flange plate 28 is fixedly arranged at the front side of the upper side surface of the platform 1, the flange plate 28 is of a semicircular structure, and the flange plate 28 and the upper side surface of the platform 1 are integrally formed; when a teacher speaks, the teacher sits between the flange plates 28 on the left side and the right side, so that the arms can be conveniently placed, and meanwhile, the office area is increased; the device also comprises a rotating frame 15, a supporting frame 7, a first sliding rail 5, a second sliding rail 16, a driving motor 8, an electric push rod 10 and an adjusting plate 11; a plurality of first sliding rails 5 are symmetrically and fixedly arranged on the left side wall and the right side wall of the platform 1 through bolts, first sliding blocks 6 are arranged on the first sliding rails 5 in a sliding manner, a supporting frame 7 is arranged in an inverted U shape, the left vertical end and the right vertical end of the supporting frame 7 are respectively fixed on the first sliding blocks 6 on the left side and the right side through bolts, a driving motor 8 with the model of 60KTYZ is fixedly arranged on the rear side of the left side wall and the right side wall of the platform 1 through a motor bracket and the bolts, a screw rod 9 is fixedly connected to the output end of the driving motor 8 through a coupler and the bolts, and the left vertical end and the right vertical end of the supporting frame 7 are respectively fixedly connected with a screw; an electric push rod 10 with the model number of smr-3 is vertically and fixedly arranged on the inner bottom surface of the storage cabinet 3 through a bolt, the upper end of the electric push rod 10 is fixedly connected with an adjusting plate 11 through a bolt, fixing seats 29 are symmetrically and fixedly welded on the left side and the right side of the upper side surface of the adjusting plate 11, and the sections of the fixing seats 29 are arranged in an inverted L shape; the base of the computer display is clamped between the fixing seats 29 on the left side and the right side, so that the stability of the computer display is improved, a through hole is formed in the upper side face of the platform 1 on the upper side of the storage cabinet 3, a placing groove 12 is formed in the platform 1 on the left side of the through hole, a baffle 13 is movably inserted in the placing groove 12, the baffle 13 is matched with the through hole, and a buckling groove 24 is formed in the right side face of the baffle 13; the teacher realizes the opening and closing of the baffle 13 through the catching groove 24; a rotating seat 14 is fixedly embedded in the middle of the upper side face of the support frame 7, the upper part of the rotating seat 14 is connected with a rotating frame 15 through a bolt, limiting grooves 25 are symmetrically formed in the upper side faces of the support frame 7 on the left side and the right side of the rotating seat 14, limiting rods 26 are fixedly welded on the bottom face of the rotating frame 15, and the limiting rods 26 are movably inserted into the limiting grooves 25; the left side wall and the right side wall of the front end and the rear end of the limiting groove 25 are symmetrically and fixedly provided with elastic fixture blocks 27 made of rubber materials through gluing; when the limiting rod 26 is movably clamped in the limiting groove 25 in the middle of the elastic clamping block 27, the rotating frame 15 is arranged in parallel with the supporting piece, the second sliding rails 16 are symmetrically and fixedly arranged on the left side and the right side of the front side wall of the supporting frame 7 through bolts, the third sliding rails 17 are symmetrically and fixedly arranged on the left side and the right side of the front side wall of the rotating frame 15 through bolts, and the second sliding rails 16 are matched with the third sliding rails 17; a writing board 18 is arranged on the front side of the rotating frame 15, a second sliding block 19 is symmetrically and fixedly arranged on the left side and the right side of the rear side wall of the writing board 18 through bolts, and the second sliding block 19 is arranged on a second sliding rail 16 and a third sliding rail 17 in corresponding positions in a sliding manner; a limiting plate 30 is fixedly arranged on the front side wall of the support frame 7 at the lower side of the third slide rail 17; when the writing board 18 moves to the third sliding rail 17, the limiting plate 30 limits the lowest side stroke of the writing board 18, and at the moment, a teacher can conveniently write on the writing board 18; a fixed plate 20 is fixedly welded on the front side wall of the rotating frame 15 on the upper side of the writing board 18, a plurality of electromagnets 21 are fixedly arranged on the bottom surface of the fixed plate 20 at equal intervals through bolts, the types of the electromagnets 21 are XDA-40/25 and Q40, an iron sheet 22 is fixedly arranged on the upper side surface of the writing board 18 through bolts, and the electromagnets 21 and the iron sheet 22 are attracted; handles 23 are symmetrically and fixedly arranged on the left side wall and the right side wall of the writing board 18 through bolts;
the driving motor 8, the electric push rod 10 and the electromagnet 21 are all connected with an external power supply.
The working principle of the specific embodiment is as follows: when a teacher is in teaching, the teacher sits at the front side of the platform 1, a computer display is placed on the supporting plate, when data searching is needed, the electric push rod 10 and the baffle 13 are opened, the electric push rod 10 extends to drive the adjusting plate 11 to ascend, so that the computer display is exposed out of the upper side face of the platform 1, and similarly, when a computer is not used, the electric push rod 10 is shortened, and the computer display is stored in the storage cabinet; when writing on a blackboard is needed, the writing board 18 is moved downwards through the handle 23, the second sliding block 19 slides onto the third sliding rail 17 through the second sliding rail 16, then a teacher writes on the blackboard, after writing on the blackboard is finished, the writing board 18 is moved upwards, the electromagnet 21 and the iron sheet 22 are attracted to fix the position of the writing board 18, the rotating frame 15 is rotated, and the writing board 18 is displayed for the student to watch; then, the driving motor 8 is turned on, the driving motor 8 drives the screw rod 9 to rotate, and the supporting frame 7 is driven to move backwards on the first sliding rail 5 through the first sliding block 6, so that the writing board 18 is closer to a specific student.
After adopting above-mentioned structure, this embodiment beneficial effect does:
1. the platform 1, the writing board 18 and the office desk top are integrated in one device, so that a teacher can use the device conveniently;
2. the teacher can write on the board to the educated person, and the teacher can display the board to the students by rotating the rotary frame 15 through the rotary seat 14 after writing on the writing board 18;
3. the driving motor 8 adjusts the position of the support frame 7 on the first sliding rail 5, so that the writing board 18 can be displayed to the educated person in a closer distance;
4. computer display can accomodate in the inside of cabinet 3, and when needing to use, can stretch out podium 1 and go up the side, makes things convenient for the teacher to operate more.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A teaching aid comprises a platform (1), a drawer (2), a storage cabinet (3) and a cabinet door (4); a plurality of drawers (2) are movably inserted into the left side of the bottom of the platform (1), a storage cabinet (3) is fixedly arranged on the right side of the bottom of the platform (1), and a cabinet door (4) is rotatably arranged on an opening end on the front side of the storage cabinet (3) through a hinge; the method is characterized in that: the device also comprises a rotating frame (15), a supporting frame (7), a first sliding rail (5), a second sliding rail (16), a driving motor (8), an electric push rod (10) and an adjusting plate (11); a plurality of first sliding rails (5) are symmetrically and fixedly arranged on the left side wall and the right side wall of the platform (1), a first sliding block (6) is arranged on each first sliding rail (5) in a sliding manner, a supporting frame (7) is arranged in an inverted U shape, the left vertical end and the right vertical end of the supporting frame (7) are respectively fixed on the first sliding blocks (6) on the left side and the right side, a driving motor (8) is fixedly arranged on the rear side of the left side wall and the right side wall of the platform (1) through a motor support, a screw rod (9) is fixedly connected to the output end of the driving motor (8), and the left vertical end and the right vertical end of the supporting frame (7) are respectively fixedly connected with a screw nut which is; an electric push rod (10) is vertically and fixedly arranged on the inner bottom surface of the storage cabinet (3), an adjusting plate (11) is fixedly connected to the upper end of the electric push rod (10), a through hole is formed in the upper side surface of the platform (1) on the upper side of the storage cabinet (3), a placing groove (12) is formed in the platform (1) on the left side of the through hole, a baffle plate (13) is movably inserted in the placing groove (12), and the baffle plate (13) is matched with the through hole; a rotating seat (14) is fixedly embedded in the middle of the upper side face of the supporting frame (7), the upper part of the rotating seat (14) is connected with a rotating frame (15), second sliding rails (16) are symmetrically and fixedly arranged on the left side and the right side of the front side wall of the supporting frame (7), third sliding rails (17) are symmetrically and fixedly arranged on the left side and the right side of the front side wall of the rotating frame (15), and the second sliding rails (16) are matched with the third sliding rails (17); a writing board (18) is arranged on the front side of the rotating frame (15), second sliding blocks (19) are symmetrically and fixedly arranged on the left side and the right side of the rear side wall of the writing board (18), and the second sliding blocks (19) are arranged on a second sliding rail (16) and a third sliding rail (17) in corresponding positions in a sliding manner; a fixed plate (20) is fixedly arranged on the front side wall of the rotating frame (15) on the upper side of the writing board (18), a plurality of electromagnets (21) are fixedly arranged on the bottom surface of the fixed plate (20) at equal intervals, an iron sheet (22) is fixedly arranged on the upper side surface of the writing board (18), and the electromagnets (21) and the iron sheet (22) are attracted to each other; handles (23) are symmetrically and fixedly arranged on the left side wall and the right side wall of the writing board (18);
the driving motor (8), the electric push rod (10) and the electromagnet (21) are all connected with an external power supply.
2. A teaching aid as claimed in claim 1 wherein: a buckle groove (24) is formed in the right side of the upper side face of the baffle (13); the teacher realizes the opening and closing of the baffle (13) through the catching groove (24).
3. A teaching aid as claimed in claim 1 wherein: limiting grooves (25) are symmetrically formed in the upper side faces of the supporting frames (7) on the left side and the right side of the rotating seat (14), limiting rods (26) are fixedly arranged on the bottom face of the rotating frame (15), and the limiting rods (26) are movably inserted into the limiting grooves (25); elastic clamping blocks (27) are symmetrically and fixedly arranged on the left side wall and the right side wall of the front end and the rear end of the limiting groove (25); when the limiting rod (26) is movably clamped in the limiting groove (25) in the middle of the elastic clamping block (27), the rotating frame (15) and the supporting piece are arranged in parallel.
4. A teaching aid as claimed in claim 1 wherein: a flange plate (28) is fixedly arranged on the front side of the upper side surface of the platform (1), the flange plate (28) is of a semicircular structure, and the flange plate (28) and the upper side surface of the platform (1) are of an integrated structure; when a teacher speaks, the teacher sits between the flange plates (28) on the left side and the flange plates on the right side, so that the arms can be placed conveniently, and meanwhile, the office area is increased.
5. A teaching aid as claimed in claim 1 wherein: fixing seats (29) are symmetrically and fixedly arranged on the left side and the right side of the upper side surface of the adjusting plate (11), and the sections of the fixing seats (29) are arranged in an inverted L shape; the base of the computer display is clamped between the fixing seats (29) on the left side and the right side, so that the stability of the computer display is improved.
6. A teaching aid as claimed in claim 1 wherein: a limiting plate (30) is fixedly arranged on the front side wall of the support frame (7) at the lower side of the third slide rail (17); when the writing board (18) moves to the third sliding rail (17), the limiting plate (30) limits the lowest side stroke of the writing board (18), and at the moment, a teacher can conveniently write on the writing board (18).
7. A teaching aid as claimed in claim 1 wherein: the working principle is as follows: when a teacher is in teaching, the teacher sits at the front side of the platform (1), a computer display is placed on the supporting plate, when data searching is needed, the electric push rod (10) and the baffle (13) are opened, the electric push rod (10) extends to drive the adjusting plate (11) to ascend, so that the computer display is exposed out of the upper side face of the platform (1), and similarly, when a computer is not used, the electric push rod (10) is shortened, and the computer display is stored in the storage cabinet (3); when writing on a blackboard is needed, the writing board (18) is moved downwards through the handle (23), the second sliding block (19) slides to the third sliding rail (17) through the second sliding rail (16), then a teacher writes on the blackboard, and after writing on the blackboard is finished, the writing board (18) is moved upwards, so that the electromagnet (21) and the iron sheet (22) are attracted to fix the position of the writing board (18), the rotating frame (15) is rotated, and the writing board (18) is displayed for students to watch; then open driving motor (8), driving motor (8) drive lead screw (9) and rotate to drive support frame (7) through slider (6) rearward movement on slide rail (5) No. one, make the concrete student of clipboard (18) nearer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047522.9A CN112315188B (en) | 2020-09-29 | 2020-09-29 | Teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047522.9A CN112315188B (en) | 2020-09-29 | 2020-09-29 | Teaching aid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112315188A true CN112315188A (en) | 2021-02-05 |
| CN112315188B CN112315188B (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011047522.9A Active CN112315188B (en) | 2020-09-29 | 2020-09-29 | Teaching aid |
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| CN (1) | CN112315188B (en) |
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