阅读说明：本技术 一种教学管理设备 (Teaching management equipment ) 是由 陈颖 王彦梅 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种教学管理设备,包括主体,主体内部底面设有多个竖直放置的演示板,每个演示板左右两侧设有升降装置,升降装置可带动演示板上下移动,主体两侧设有转移装置,主体内部设有举升装置,转移装置可带动演示板移动靠近举升装置,举升装置包括可上下升降的第二支撑座,演示板下部可抵接第二支撑座上部,第二支撑座可带动演示板超出主体上部,演示板上部盖合有盖子,演示板内部设有升降板,当演示板超出主体上部时,盖子打开且升降板上部高于演示板上部。本发明通过升降装置、转移装置和举升装置可对不同的演示板进行切换,便于演示板的更换,通过设置升降板,可大大提高演示板的使用面积,便于老师授课,结构简单合理,实用性好。(The invention discloses teaching management equipment which comprises a main body, wherein a plurality of vertically placed demonstration boards are arranged on the bottom surface in the main body, lifting devices are arranged on the left side and the right side of each demonstration board and can drive the demonstration boards to move up and down, transfer devices are arranged on the two sides of the main body, lifting devices are arranged in the main body and can drive the demonstration boards to move close to the lifting devices, each lifting device comprises a second supporting seat capable of lifting up and down, the lower parts of the demonstration boards can be abutted against the upper parts of the second supporting seats, the second supporting seats can drive the demonstration boards to exceed the upper parts of the main body, covers are covered on the upper parts of the demonstration boards, lifting boards are arranged in the demonstration boards, and when the demonstration boards exceed the upper parts of the main body, the covers are opened, and the upper parts of the lifting boards are higher than the upper parts of the demonstration boards. The demonstration board switching device can switch different demonstration boards through the lifting device, the transfer device and the lifting device, is convenient for replacing the demonstration boards, can greatly improve the use area of the demonstration boards through the lifting devices, is convenient for teachers to give lessons, and has simple and reasonable structure and good practicability.)

1. A teaching management device is characterized in that: comprises a main body (1), a plurality of vertically placed demonstration boards (3) are arranged on the bottom surface inside the main body (1), each demonstration board (3) is provided with a lifting device (2) on the left and right sides, the lifting devices (2) can drive the demonstration boards (3) to move up and down, transfer devices (4) are arranged on the two sides of the main body (1), the transfer devices (4) are arranged on the same side of the lifting devices (2), lifting devices (5) are arranged inside the main body (1), the transfer devices (4) can drive the demonstration boards (3) to move close to the lifting devices (5), each lifting device (5) comprises a second supporting seat (502) capable of lifting up and down, the lower parts of the demonstration boards (3) can be abutted against the upper parts of the second supporting seats (502), the second supporting seats (502) can drive the demonstration boards (3) to exceed the upper parts of the main body (1), and covers (308) on the upper parts of the demonstration boards (3), the cover (308) is buckled with the demonstration board (3), a lifting board (305) is arranged inside the demonstration board (3), when the demonstration board (3) exceeds the upper part of the main body (1), the cover (308) is opened, and the upper part of the lifting board (305) is higher than the upper part of the demonstration board (3);

the bottom of the main body (1) is provided with a first connecting block (106), the upper part of the second supporting seat (502) is provided with a back plate (503), the upper part of the back plate (503) is hinged with a turnover plate (509), the lower part of the cover (308) is abutted to the upper part of the turnover plate (509), the lower part of the turnover plate (509) is provided with a second connecting block (510), and the first connecting block (106) is connected with the second connecting block (510) through a rope (7).

2. A teaching management apparatus as claimed in claim 1, wherein: the back of the back plate (503) is provided with a supporting block (508), the upper part of the supporting block (508) is provided with an annular rib (511), a spring (512) is arranged in the annular rib (511), and the upper part of the spring (512) is abutted against the lower part of the turnover plate (509).

3. A teaching management apparatus as claimed in claim 1, wherein: the inside mounting groove (306) that is equipped with of lifter plate (305), the inside lower surface of demonstration board (3) is equipped with hydraulic ram (307), hydraulic ram (307) insert in mounting groove (306), the telescopic link butt mounting groove (306) upper portion of hydraulic ram (307).

4. A teaching management apparatus as claimed in claim 1, wherein: one side that demonstration board (3) is close to backplate (503) is equipped with a plurality of breachs (310), lid (308) lower part is equipped with buckle (309) that correspond with breach (310), buckle (309) and breach (310) lock.

5. A teaching management apparatus as claimed in claim 1, wherein: a limiting plate (504) which can move close to or far away from the back plate (503) is arranged at the upper part of the second supporting seat (502), and the demonstration plate (3) is positioned between the back plate (503) and the limiting plate (504);

second supporting seat (502) upper portion is equipped with a plurality of third guide way (5021), limiting plate (504) lower part downwardly extending is equipped with second direction muscle (5041) that run through third guide way (5021), and is a plurality of second direction muscle (5041) lower extreme passes through connecting plate (5042) and connects, second direction muscle (5041) can remove along third guide way (5021).

6. A teaching management apparatus as claimed in claim 5, wherein: second supporting seat (502) lower part downwardly extending is equipped with a plurality of first archs (506), connecting plate (5042) lower part downwardly extending is equipped with second arch (507) corresponding with first arch (506), and is relative first arch (506) and second arch (507) are connected through extension spring (505).

7. A teaching management apparatus as claimed in claim 6, wherein: main part (1) bottom upwards extends and is equipped with stand (6) that correspond with third guide way (5021), third guide way (5021) can be inserted or break away from on stand (6) upper portion, stand (6) upper end is located between backplate (503) and limiting plate (504), stand (6) upper portion is equipped with the downward inclined plane of slope towards limiting plate (504) one side, the inclined plane can butt or break away from between limiting plate (504).

8. A teaching management apparatus as claimed in claim 1, wherein: the inside both sides of main part (1) are equipped with and correspond and the first straight rack (103) of vertical setting with demonstration board (3), elevating gear (2) include gear (203), gear (203) and first straight rack (103) meshing, gear (203) can roll along first straight rack (103), demonstration board (3) both sides are close to gear (203) and locate to be equipped with spacing post (303), spacing post (303) can insert or break away from inside gear (203).

9. A teaching management apparatus as claimed in claim 8, wherein: first guide grooves (101) corresponding to the demonstration board (3) are formed in two sides of the main body (1), the lifting device (2) comprises a first motor (201), the first motor (201) is located on the outer side of the main body (1), the first motor (201) comprises a rotating shaft (2011), and the rotating shaft (2011) penetrates through the first guide grooves (101) and is fixedly connected with the first gear (203);

first guide way (101) are outwards extended and are equipped with first direction muscle (1011), axis of rotation (2011) outside cover is equipped with uide bushing (202), it is spacing in uide bushing (202) is inserted in first direction muscle (1011), uide bushing (202) can reciprocate along first direction muscle (1011).

10. A teaching management apparatus as claimed in claim 9, wherein: the inside both sides of main part (1) are equipped with second spur rack (104), first spur rack (103) are located first guide way (101) both sides respectively with second spur rack (104), axis of rotation (2011) outside bearing is connected with gear two (204), gear two (204) and second spur rack (104) meshing, gear two (204) cross-sectional diameter is less than gear one (203) cross-sectional diameter.

Technical Field

The invention relates to the technical field of teaching equipment, in particular to teaching management equipment.

Background

When a teacher gives a lesson, a teacher often performs teaching demonstration on some contents to improve the learning enthusiasm of students, so that teaching management is facilitated; secondly, the area of the demonstration board is small, and the display content is limited, so that the improvement is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides teaching management equipment, which can switch different demonstration boards through a lifting device, a transfer device and a lifting device, is convenient for replacing the demonstration boards, can greatly increase the use area of the demonstration boards through arranging the lifting boards, enables the demonstration boards to display more contents, is convenient for teachers to give lessons, and has simple and reasonable structure and good practicability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a teaching management device comprises a main body, a plurality of vertically placed demonstration boards are arranged on the bottom surface inside the main body, lifting devices are arranged on the left side and the right side of each demonstration board, the lifting device can drive the demonstration board to move up and down, the two sides of the main body are provided with the transfer devices, the transfer devices and the lifting device are arranged on the same side, the inside of the main body is provided with a lifting device, the transfer device can drive the demonstration board to move close to the lifting device, the lifting device comprises a second supporting seat capable of lifting up and down, the lower part of the demonstration board can be abutted against the upper part of the second supporting seat, the second supporting seat can drive the demonstration board to exceed the upper part of the main body, the upper part of the demonstration board is covered with a cover, the cover is buckled with the demonstration board, a lifting board is arranged inside the demonstration board, when the demonstration board exceeds the upper part of the main body, the cover is opened, and the upper part of the lifting board is higher than the upper part of the demonstration board.

The improved cover is characterized in that a first connecting block is arranged at the bottom of the main body, a back plate is arranged on the upper portion of the second supporting seat, a turnover plate is hinged to the upper portion of the back plate, the lower portion of the cover is abutted to the upper portion of the turnover plate, a second connecting block is arranged on the lower portion of the turnover plate, and the first connecting block is connected with the second connecting block through a rope.

The back of the back plate is provided with a supporting block, the upper portion of the supporting block is provided with an annular rib, a spring is arranged in the annular rib, and the upper portion of the spring is abutted to the lower portion of the turnover plate.

The inside mounting groove that is equipped with of lifter plate, the inside lower surface of demonstration board is equipped with hydraulic ejector pin, hydraulic ejector pin inserts in the mounting groove, hydraulic ejector pin's telescopic link butt mounting groove upper portion.

One side that the demonstration board is close to the backplate is equipped with a plurality of breachs, the lid lower part is equipped with the buckle that corresponds with the breach, buckle and breach lock.

A limiting plate which can move close to or far away from the back plate is arranged at the upper part of the second supporting seat, and the demonstration plate is positioned between the back plate and the limiting plate;

second supporting seat upper portion is equipped with a plurality of third guide ways, limiting plate lower part downwardly extending is equipped with the second direction muscle that runs through the third guide way, and is a plurality of second direction muscle lower extreme passes through the connecting plate to be connected, the second direction muscle can remove along the third guide way.

Second supporting seat lower part downwardly extending is equipped with a plurality of first archs, connecting plate lower part downwardly extending is equipped with the second arch that corresponds with first arch, and is relative first arch and second arch are connected through the extension spring.

The main part bottom upwards extends and is equipped with the stand that corresponds with the third guide way, stand upper portion can insert or break away from the third guide way, the stand upper end is located between backplate and the limiting plate, stand upper portion is equipped with the inclined plane that inclines downwards towards limiting plate one side, but the inclined plane butt or break away from between the limiting plate.

The inside both sides of main part are equipped with the first straight-bar that corresponds and vertical setting with the demonstration board, elevating gear includes gear one, gear one and first straight-bar meshing, gear one can roll along first straight-bar, demonstration board both sides are close to a gear department and are equipped with spacing post, spacing post can insert or break away from inside gear one.

First guide grooves corresponding to the demonstration boards are formed in two sides of the main body, the lifting device comprises a first motor, the first motor is located on the outer side of the main body, the first motor comprises a rotating shaft, and the rotating shaft penetrates through the first guide grooves and is fixedly connected with the first gear;

the first guide groove is provided with a first guide rib in an outward extending mode, a guide sleeve is sleeved on the outer side of the rotating shaft, the first guide rib is inserted into the guide sleeve for limiting, and the guide sleeve can move up and down along the first guide rib;

the two sides of the interior of the main body are provided with second straight racks, the first straight racks and the second straight racks are respectively positioned on two sides of the first guide groove, a second gear is connected to a bearing on the outer side of the rotating shaft and meshed with the second straight racks, and the diameter of the section of the second gear is smaller than that of the section of the gear.

The invention has the beneficial effects that:

1. the demonstration board is transferred into the transfer device through the lifting device, transferred into the lifting device through the transfer device and lifted to the upper part of the main body through the lifting device, so that the automatic switching function of the demonstration board is realized, a teacher can conveniently perform teaching demonstration, the teaching efficiency of the teacher is greatly improved, the structure is simple and reasonable, and the practicability is good;

2. through the matching of the first gear and the first straight rack and the matching of the second gear and the second straight rack, the moving precision of the lifting device is greatly improved, so that the demonstration board can be accurately transferred into the transfer device, the structure is simple and reasonable, and the practicability is good;

3. the automatic lifting function of the lifting plate is realized through the matching of the rope, the lifting cylinder, the hydraulic ejector rod, the cover, the turnover plate and the demonstration plate, namely, when the demonstration plate is higher than the upper part of the main body, the lifting plate automatically lifts, more teaching contents can be displayed through the demonstration plate and the lifting plate, and the teaching efficiency of teachers is improved; in addition, the hidden lifting plate is arranged, so that the occupied space is greatly reduced, the size of the teaching device is reduced, and the teaching device is convenient to use.

Drawings

FIG. 1 is a schematic view of the present invention in a first state;

FIG. 2 is a schematic view of the internal structure of the present invention in a first state;

FIG. 3 is a cross-sectional view of the present invention in a first state;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is an enlarged view of FIG. 3 at B;

FIG. 6 is a schematic structural diagram of the present invention in a second state;

FIG. 7 is a partial cross-sectional view of the present invention in a second state;

FIG. 8 is a schematic view showing the internal structure of the present invention in a third state;

FIG. 9 is a cross-sectional view of the present invention in a third state;

FIG. 10 is an enlarged view of FIG. 9 at C;

fig. 11 is an enlarged view of fig. 9 at D.

FIG. 12 is a schematic structural view of the present invention in a fourth state;

FIG. 13 is a cross-sectional view of the demonstration board;

FIG. 14 is a partial cross-sectional view of a lifting device;

fig. 15 is a partial schematic view showing the transfer of the board to the lifting device.

In the figure: the lifting device comprises a main body 1, a first guide groove 101, a first guide rib 1011, a second guide groove 102, a first straight rack 103, a second straight rack 104, a flip cover 105, a first connecting block 106, a lifting device 2, a first motor 201, a rotating shaft 2011, a guide sleeve 202, a first supporting seat 2021, a first gear 203, a limiting groove 2031, a second gear 204, a demonstration plate 3, a fixing plate 301, a first cylinder 302, a limiting column 303, a limiting hole 304, a lifting plate 305, a mounting groove 306, a hydraulic top rod 307, a cover 308, a buckle 309, a notch 310, a transfer device 4, a supporting plate 401, a screw rod 402, a guide rod 403, a second motor 404, a slider 405, a second cylinder 406, a lifting device 5, a lifting cylinder 501, a second supporting seat 502, a third guide groove 5021, a back plate 503, a limiting plate 504, a second guide rib 5041, a connecting plate 5042, a tension spring 505, a first protrusion 506, a second protrusion 507, a supporting block 508, a plate 509, a turnover plate, Second connecting block 510, annular rib 511, spring 512, hinge 513, upright 6 and rope 7.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description below:

in the description of the present specification, the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 15, a teaching management device comprises a main body 1, wherein a plurality of vertically placed demonstration boards 3 are arranged on the bottom surface inside the main body 1, lifting devices 2 are arranged on the left side and the right side of each demonstration board 3, and the lifting devices 2 can drive the demonstration boards to move up and down;

as shown in fig. 3 to 7, specifically, the two sides inside the main body 1 are provided with a first straight rack 103 which corresponds to the demonstration board 3 and is vertically arranged, the lifting device 2 includes a first gear 203, the first gear 203 is engaged with the first straight rack 103, the first gear 203 can roll along the first straight rack 103, the two sides of the demonstration board 3 near the first gear 203 are provided with a limiting post 303, the limiting post 303 can be inserted into or separated from the inside of the first gear 203, that is, the side surface of the first gear 203 is provided with a limiting groove 2031, and the limiting post 303 can be inserted into or separated from the limiting groove 2031;

the 1 both sides of main part are equipped with the first guide way 101 that corresponds with demonstration board 3, elevating gear 2 includes first motor 201, first motor 201 is located the 1 outside of main part, first motor 201 includes axis of rotation 2011, axis of rotation 2011 run through first guide way 101 and with a gear 203 fixed connection.

When the teacher needs to teach, the limiting column 303 on the required demonstration board 3 is inserted into the first gear 203, the first motors 201 on the two sides work to drive the first gear 203 to rotate, and the first gear 203 rolls upwards along the first straight rack 103 to drive the demonstration board 3 to move upwards until being higher than the rest demonstration boards 3; elevating gear 2 passes through the cooperation of gear 203 with first straight-line rack 103, realizes reciprocating of demonstration board 3, has improved the removal precision greatly, and the demonstration board 3 of being convenient for switches the transfer, and simple structure is reasonable, and the practicality is good.

Preferably, the first guide groove 101 extends outwards to be provided with a first guide rib 1011, the outer side of the rotating shaft 2011 is sleeved with the guide sleeve 202, the first guide rib 1011 is inserted into the guide sleeve 202 to be limited, the guide sleeve 202 can move up and down along the first guide rib 1011, the lower part of the guide sleeve 202 extends outwards to be provided with a first supporting seat 2021, the first motor 201 is fixed on the first supporting seat 2021, and through the matching of the guide sleeve 202 and the first guide rib 1011, the guide effect can be achieved, the deviation of the lifting device 2 in the lifting process is prevented, the first gear 203 can be prevented from being separated from the first straight rack 103, and the moving accuracy is improved.

Wherein, the inside both sides of main part 1 are equipped with second spur rack 104, first spur rack 103 is located first guide way 101 both sides respectively with second spur rack 104, axis of rotation 2011 outside bearing is connected with gear two 204, gear two 204 and the meshing of second spur rack 104, gear two 204 cross-sectional diameter is less than gear one 203 cross-sectional diameter, and through above-mentioned design, when elevating gear 2 is in the lift in-process, gear two 204 also can roll along second spur rack 104, through the cooperation of gear one 203 with first spur rack 103, gear two 204 and second spur rack 104 have improved the precision that elevating gear 2 removed greatly, and simple structure is reasonable, and the practicality is good.

As shown in fig. 3-7, transfer devices 4 are disposed on two sides of the main body 1, the transfer devices 4 are disposed on the same side as the lifting device 2, and a lifting device 5 is disposed inside the main body 1;

the transfer device 4 can drive the demonstration board 3 to move close to the lifting device 5, the transfer device 4 comprises a sliding block 405, the sliding block 405 can move close to or away from the lifting device 5, a second air cylinder 406 is arranged on one side of the sliding block 405 facing the demonstration board 3, and an expansion rod of the second air cylinder 406 can be inserted into or separated from the demonstration board 3;

specifically, the two sides of the main body 1 are provided with second guide grooves 102, the telescopic rods of the second cylinders 406 are inserted into the second guide grooves 102, the two sides of the demonstration board 3 are provided with limiting holes 304, and the telescopic rods of the second cylinders 406 can be inserted into or separated from the limiting holes 304.

The inside fixed plate 301 that is equipped with of demonstration board 3, the fixed plate 301 outside is equipped with first cylinder 302, the telescopic link tip and the spacing post 303 fixed connection of first cylinder 302, when demonstration board 3 rises to a take the altitude through elevating gear 2, slider 405 drives second cylinder 406 and removes, make the telescopic link of second cylinder 406 just to spacing hole 304, at this moment, the telescopic link of second cylinder 406 inserts spacing downthehole 304 spacing, later first cylinder 302 work, drive spacing post 303 and break away from gear 203, make demonstration board 3 and elevating gear 2 break away from, through above-mentioned structural design, can accomplish demonstration board 3 from elevating gear 2 to transfer device 4's transfer, be convenient for demonstration board 3's switching, thereby be convenient for mr's teaching.

Wherein, the main part 1 both sides are close to front and back surface department and are equipped with backup pad 401, connect through two guide bars 403 between two backup pads 401 of homonymy, two be equipped with lead screw 402 between the guide bar 403, lead screw 402 and guide bar 403 run through slider 405 respectively, slider 405 and lead screw 402 threaded connection, slider 405 can remove along guide bar 403, is equipped with second motor 404 on being close to the backup pad 401 at the main part 1 back, the drive shaft and the lead screw 402 of second motor 404 are connected, and when needs shift demonstration board 3 to lifting devices 5, second motor 404 work drives lead screw 402 and rotates, and lead screw 402 drives slider 405 and removes and be close to lifting devices 5 to it is close to lifting devices 5 to drive demonstration board 3.

The lifting device 5 comprises a second supporting seat 502 capable of lifting up and down, the lower part of the demonstration board 3 can abut against the upper part of the second supporting seat 502, the second supporting seat 502 can drive the demonstration board 3 to exceed the upper part of the main body 1, and when the transfer device 4 drives the demonstration board 3 to move to the lifting device 5, the lifting device 5 rises, so that the lower part of the demonstration board 3 abuts against the upper part of the second supporting seat 502;

specifically do, second supporting seat 502 upper portion is equipped with backplate 503 and portable limiting plate 504 that is close to or keeps away from backplate 503, demonstration board 3 is located between backplate 503 and the limiting plate 504, and when second supporting seat 502 rose, limiting plate 504 moved and butt demonstration board 3 towards demonstration board 3 department to accomplish spacing to demonstration board 3, effectually prevented that demonstration board 3 from skewing or toppling over in-process rising, influenced mr's teaching quality.

As shown in fig. 8-15, the upper portion of the second supporting seat 502 is provided with a plurality of third guiding grooves 5021, the lower portion of the limiting plate 504 extends downwards to form a second guiding rib 5041 penetrating through the third guiding grooves 5021, the lower end of the second guiding rib 5041 is connected through a connecting plate 5042, the second guiding rib 5041 can move along the third guiding grooves 5021, and the second guiding rib 5041 is matched with the third guiding grooves 5021 to enable the limiting plate 504 to move more smoothly, so that the limiting plate 504 is prevented from being jammed when moving, and the clamping effect on the demonstration plate 3 is affected.

A plurality of first protrusions 506 are arranged at the lower part of the second support seat 502 in a downward extending manner, a second protrusion 507 corresponding to the first protrusion 506 is arranged at the lower part of the connecting plate 5042 in a downward extending manner, the first protrusion 506 and the second protrusion 507 which are opposite are connected through a tension spring 505, an upright post 6 corresponding to a third guide groove 5021 is arranged at the bottom of the main body 1 in an upward extending manner, the upper part of the upright post 6 can be inserted into or separated from the third guide groove 5021, the upper end of the upright post 6 is positioned between the back plate 503 and the limit plate 504, an inclined surface inclining downwards is arranged at the upper part of the upright post 6 towards one side of the limit plate 504, and the inclined surface can be abutted against or separated from the limit plate 504;

with the above design, in the initial state, as shown in fig. 15, the upper end of the upright 6 penetrates through the third guide groove 5021, and one side of the upright 6 on the limit plate 504 abuts against the limit plate 504, at this time, the limit plate 504 is far away from the back plate 503, and the tension spring 505 is stretched; when demonstration board 3 passes through transfer device 4 and removes second supporting seat 502 top, second supporting seat 502 rises, limiting plate 504 is close to backplate 503 along stand 6's inclined plane, demonstration board 3 lower extreme inserts between backplate 503 and the limiting plate 504, when demonstration board 3 butt second supporting seat 502, stand 6 breaks away from third guide way 5021, limiting plate 504 removes butt demonstration board 3, the completion is to the centre gripping of demonstration board 3, and simple structure is reasonable, and the practicality is good.

The bottom of the main body 1 is provided with a vertical upward lifting cylinder 501, the back of the back plate 503 is provided with a supporting block 508, an expansion link of the lifting cylinder 501 is connected with the supporting block 508, and the lifting cylinder 501 can drive the second supporting seat 502 to ascend or descend.

Main part 1 upper portion lid has closed flip 105, flip 105 is articulated with main part 1, when demonstration board 3 ascends through lifting devices 5, demonstration board 3 moves the butt upwards and opens flip 105, and when demonstration board 3 was higher than main part 1 upper portion, teacher's accessible demonstration board 3 taught the operation to improve the efficiency and the quality that teacher gave lessons, simple structure is reasonable, and the practicality is good.

As shown in fig. 11-13, the lid 308 covers the upper portion of the demonstration board 3, the lid 308 is fastened to the demonstration board 3, the lifting board 305 is arranged inside the demonstration board 3, when the demonstration board 3 exceeds the upper portion of the main body 1, the lid 308 is opened, the upper portion of the lifting board 305 is higher than the upper portion of the demonstration board 3, specifically, the lid 308 is hinged to the upper portion of the demonstration board 3, one side of the demonstration board 3, which is close to the back board 503, is provided with a plurality of notches 310, the lower portion of the lid 308 is provided with buckles 309 corresponding to the notches 310, the buckles 309 are fastened to the notches 310, and by means of the above design, the lifting board 305 can be effectively prevented from pushing the lid 308 open in the moving process of the demonstration board 3, the lid 308 is convenient to open, the structure is simple and reasonable, and the practicability is good.

The bottom of the main body 1 is provided with a first connecting block 106, the upper part of the back plate 503 is hinged with a turnover plate 509, wherein the back plate 503 and the turnover plate 509 are hinged at a hinge part 513, the lower part of the cover 308 abuts against the upper part of the turnover plate 509, the lower part of the turnover plate 509 is provided with a second connecting block 510, and the first connecting block 106 and the second connecting block 510 are connected through a rope 7;

the inside mounting groove 306 that is equipped with of lifter plate 305, the inside lower surface of demonstration board 3 is equipped with hydraulic ram 307, hydraulic ram 307 inserts in the mounting groove 306, hydraulic ram 307's telescopic link butt mounting groove 306 upper portion.

Specifically, when the lifting device 5 is positioned inside the main body 1, the rope 7 is in a loose state, and when the lifting cylinder 501 pushes the demonstration board 3 to ascend, the rope 7 is gradually tensioned; when the elevation cylinder 501 pushes the demonstration board 3 higher than the upper surface of the main body 1, the rope 7 pulls and pulls the turning board 509, so that the left side of the turning board 509 rotates downward along the hinge 513, and the right side of the turning board 509 rotates upward to abut against and push the cover 308 to rotate upward; thereby disengaging the catch 309 from the notch 310; the hydraulic mandril 307 pushes the lifting plate 305 to move upwards and is higher than the upper part of the demonstration plate 3;

teaching contents can be displayed on the lifting plate 305, and through the structural design, the automatic lifting function of the lifting plate 305 is realized, namely when the demonstration plate 3 is higher than the upper part of the main body 1, the lifting plate 305 automatically lifts, more teaching contents can be displayed through the demonstration plate 3 and the lifting plate 305, and the teaching efficiency of teachers is improved; in addition, the hidden lifting plate 305 is arranged, so that the occupied space is greatly reduced, the volume of the teaching device is reduced, and the teaching device is convenient to use.

The back of the back plate 503 is provided with a supporting block 508, the upper part of the supporting block 508 is provided with an annular rib 511, a spring 512 is arranged in the annular rib 511, the upper part of the spring 512 is abutted against the lower part of the turnover plate 509, when the rope 7 is in a loose state, the turnover plate 509 receives the elastic force of the spring 512, so that the turnover plate 509 is positioned at the right side of the hinged part 513 and is abutted against the upper part of the back plate 503, and when the rope 7 pulls the turnover plate 509 to rotate downwards, the spring 512 is compressed; when lift cylinder 501 drives demonstration board 3 and descends, rope 7 relaxes, and spring 512 kick-backs for returning face plate 509 resets, through above-mentioned design, realizes returning face plate 509's automatic re-setting, and simple structure is reasonable, and the practicality is good.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.