CN112752050A

CN112752050A - Course playback system for education and teaching

Info

Publication number: CN112752050A
Application number: CN202011602378.0A
Authority: CN
Inventors: 叶欧
Original assignee: Chongqing Industry Polytechnic College
Current assignee: Chongqing Industry Polytechnic College
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-05-04

Abstract

The invention discloses a course playback system for education and teaching, which belongs to the technical field of course playback systems and comprises a blackboard, a camera and a projector, wherein the blackboard is arranged in front of the camera and the projector, a frame is arranged at the side of the blackboard, the invention can lead recorded and broadcast contents to be complete and clear by arranging a light shielding plate to shield light, well help students to consolidate knowledge, when sunlight is strong, the light shielding plate is erected and is clamped into a clamping groove of a clamping block to be fixed by rotating a fixing clamping rod, the fixing is simple, convenient and rapid, thus leading the blackboard to disappear by reflecting light, when the light shielding plate is erected, the light of the blackboard is insufficient, the condition of unclear recorded and broadcast exists, the brightness of the blackboard is increased by an LED lamp, the course playback system can be used when the recorded and broadcast blackboard is unclear, also can reinforce the light when a light source at night is insufficient, and a solar panel, the electric energy is converted into the electric energy and is provided for the LED lamp, so that the purpose of saving energy is achieved.

Description

Course playback system for education and teaching

Technical Field

The invention belongs to the technical field of course playback systems, and particularly relates to a course playback system for education and teaching.

Background

In the current classroom, often use the camera to broadcast the teacher content recorded in class and get off and store to the computer, then use the projecting apparatus to carry out the course playback, help students to carry out knowledge consolidation, if produce the reflection of light on the blackboard, then the content recorded broadcast on the blackboard comes off and can not show, can't reach the expected effect.

Disclosure of Invention

The invention provides a course playback system for education and teaching, which has the characteristics of complete and clear recorded and broadcast content and capability of well helping students to consolidate knowledge.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a course playback system for education and teaching, includes blackboard, camera and projecting apparatus, the blackboard sets up the place ahead at camera and projecting apparatus, the avris of blackboard is provided with the frame, the back of blackboard is provided with the casing, the surface both sides of casing all are provided with the recess, the recess inner wall articulates there is the light screen, the surface of light screen is provided with the LED lamp, the back of light screen is provided with the fixture block, be provided with the draw-in groove on the fixture block, articulated in the recess have the fixing clip pole, the camera is provided with the lower extreme of projecting apparatus and places the board.

Preferably, one side of the shell is provided with a solar panel, the lower end of the solar panel is provided with a supporting mechanism, the outer wall of one side of the shell is provided with a battery placing cabinet, a storage battery pack is placed inside the battery placing cabinet, the storage battery pack is electrically connected with the solar panel, and the storage battery pack is electrically connected with the LED lamp.

Preferably, the top both sides of blackboard are provided with two sets of supporting seats, the supporting seat is fixed at housing face, and is two sets of be provided with the pivot between the supporting seat, the surface of pivot is connected with the projection yardage roll, the output of projection yardage roll is provided with the handle frame, the outer end of pivot is provided with changes the handle, the both sides of blackboard are provided with rotatory piece, rotatory piece is fixed at housing face.

Preferably, the supporting mechanism is including setting up subaerial bottom plate, the upper end of bottom plate is provided with the stabilizer blade, the upper end of stabilizer blade is provided with the receiver, the upper end of receiver is provided with the apron, the inside of receiver is provided with the screw lead screw, the one end of screw lead screw is provided with the rocking handle, the outside at screw lead screw middle part is provided with the sliding block, the upper end of sliding block is provided with the bracing piece, the upper end of bracing piece is provided with the rotor plate, the upper end of rotor plate is provided with second fixed establishment.

Preferably, the second fixing mechanism is including setting up the fixed plate on the surface of rotor plate, the side of fixed plate all is provided with the dead lever, the one end of dead lever is provided with the extension rod, the inside inner chamber that is provided with of one end that the fixed plate was kept away from to the extension rod, the centre of inner chamber is provided with tensile pole, the outside of tensile pole is provided with compression spring, the one end of tensile pole is provided with the pressure strip, the dead lever all is provided with the screw hole with the inside of extension rod, the threaded hole inside of coincidence between dead lever and the extension rod is provided with the screw thread axle.

Preferably, the sliding groove is arranged at the bottom of the sliding block.

Preferably, the lower end of the placing plate is provided with an adjusting rod, a fixed hollow rod is arranged outside the adjusting rod, the lower end of the fixed hollow rod is provided with a base, two sides of the outer wall of the adjusting rod are provided with a plurality of groups of fixing holes, and a plurality of groups of first fixing mechanisms are arranged outside the fixed hollow rod;

preferably, the first fixing mechanism comprises a supporting frame fixed on the outer wall of the fixed hollow rod, a cross rod is arranged in the middle of the supporting frame, one end, running through the supporting frame, of the cross rod is provided with a pulling block, one end, running through the supporting frame, of the cross rod is provided with a pin shaft, the pin shaft runs through the fixed hollow rod and stretches into the fixing hole, a spring is arranged outside one end, close to the pin shaft, of the cross rod, one end of the spring is fixed on the pin shaft, and the other end of the spring is fixed on.

Preferably, the both sides limit of base all is provided with the mount, the centre of mount is provided with the threaded rod, the lower extreme of threaded rod is provided with the walking wheel, the upper end of threaded rod is fixed with the rolling disc.

Preferably, a fixing shaft is arranged on the inner side wall of the support frame, and a baffle is rotatably connected to one end, far away from the support frame, of the fixing shaft.

Compared with the prior art, the invention has the beneficial effects that:

1. the light blocking plate is arranged to block light, so that recorded and broadcast contents are complete and clear, students can be well helped to consolidate knowledge, when sunlight is strong, the light blocking plate is erected and clamped into the clamping groove of the clamping block to be fixed through rotating the fixing clamping rod, the fixing is simple, convenient and rapid, the reflection of light of the blackboard disappears, after the light blocking plate is erected, the light of the blackboard is insufficient, the recorded and broadcast situation is caused, the brightness of the blackboard is increased through the LED lamp, the light blocking plate can be used when the recorded and broadcast situation is not clear, the light can be reinforced when a light source at night is insufficient, the solar panel collects solar energy and converts the solar energy into electric energy, and the electric energy is supplied to the LED lamp sufficiently, so that the purpose of saving energy.

2. The solar panel fixing device can fix solar panels of different models through the second fixing mechanism, is quick in fixing and convenient to install and disassemble, the solar panel is placed on the fixing plate, the extension rod is adjusted according to the size of the solar panel so as to be matched with the solar panel, the extension rod and the fixing rod are fixed through the matching of the threaded shaft and the threaded hole, the pressing plate is pulled by hand so as to enable the compression spring to be stressed and stretched, the pressing plate is released, the elastic force of the compression spring is enabled to fix the side edge of the solar panel, meanwhile, the solar panel can be collected through the storage box, dust is effectively prevented from falling on the solar panel when a classroom is cleaned, the efficiency of the solar panel is prevented from being influenced, and the rotating plate can be adjusted.

3. The height of the adjusting rod can be adjusted to adjust the recorded broadcast and the projection, the recorded broadcast and the projection requirements are met, recorded broadcast and projected images are clearer and more complete and are convenient to watch, the pull block is pulled during adjustment, the pull block drives the transverse rod to move outwards, so that the pin shaft is pulled out of the fixing hole, the downward rotating baffle blocks the pin shaft to reset, and after adjustment is completed, the baffle is rotated upwards during fixing, so that the pin shaft is inserted into the corresponding fixing hole under the elastic force of the spring, and the fixed fixing device is simple, convenient, quick and firm.

4. According to the invention, the base is moved to the corresponding position through the travelling wheels, the recording and broadcasting and projection distances are adjusted, the moving and the transportation are convenient, after the base reaches the destination, the rotating disc is rotated to enable the threaded rod to rotate and rise, the travelling wheels rise to enable the base to be in contact with the ground, the contact area is increased, the support stability is improved, the moving and the transportation are convenient on one hand, and the stability of the base during placement is ensured on the other hand, so that the recording and the projection are more stable.

Drawings

Fig. 1 is a schematic structural diagram of a course playback system for education and teaching according to the present invention.

Fig. 2 is a front view of the housing of the present invention.

FIG. 3 is a schematic structural diagram of a light shielding plate according to the present invention.

Fig. 4 is a schematic structural diagram of the supporting mechanism of the present invention.

FIG. 5 is a view showing a storage state of the supporting mechanism according to the present invention.

Fig. 6 is a schematic structural diagram of a second fixing mechanism according to the present invention.

Fig. 7 is a schematic structural diagram of a first fixing mechanism according to the present invention.

In the figure: 1. a frame; 2. a base; 3. fixing the hollow rod; 4. a blackboard; 5. a first fixing mechanism; 51. a support frame; 52. a pin shaft; 53. a spring; 54. a baffle plate; 55. a fixed shaft; 56. a cross bar; 57. pulling the block; 6. a housing; 7. a visor; 8. an LED lamp; 9. a groove; 10. placing the plate; 11. a support mechanism; 111. a base plate; 112. a support leg; 113. a storage box; 114. a rotating plate; 115. a second fixing mechanism; 1151. an inner cavity; 1152. a stretch rod; 1153. a threaded shaft; 1154. a threaded hole; 1155. a fixing plate; 1156. fixing the rod; 1157. an extension rod; 1158. a compression spring; 1159. a compression plate; 116. a support bar; 117. a slider; 118. a threaded lead screw; 119. a rocking handle; 1110. a cover plate; 12. a solar panel; 13. a camera; 14. a projector; 15. adjusting a rod; 16. a battery holding cabinet; 17. fixing the clamping rod; 18. a clamping block; 19. a rotating shaft; 20. a handle frame; 21. projection yardage roll; 22. a supporting seat; 23. turning a handle; 24. rotating the block; 25. a fixing hole; 26. rotating the disc; 27. a threaded rod; 28. a fixed mount; 29. and (5) traveling wheels.

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. 1-7, the present invention provides the following technical solutions:

example 1

A course playback system for education and teaching comprises a blackboard 4, a camera 13 and a projector 14, wherein the blackboard 4 is arranged in front of the camera 13 and the projector 14, a frame 1 is arranged at the side of the blackboard 4, a shell 6 is arranged at the back of the blackboard 4, grooves 9 are respectively arranged at two sides of the surface of the shell 6, a light screen 7 is hinged at the inner wall of each groove 9, an LED lamp 8 is arranged on the surface of the light screen 7, a clamping block 18 is arranged at the back of the light screen 7, a clamping groove is arranged on each clamping block 18, a fixing clamping rod 17 is hinged in each groove 9, a placing plate 10 is arranged at the lower ends of the camera 13 and the projector 14, two groups of supporting seats 22 are arranged at two sides above the blackboard 4, the supporting seats 22 are fixed on the surface of the shell 6, a rotating shaft 19 is arranged between the two groups of supporting seats 22, a projection cloth roll 21 is, the two sides of the blackboard 4 are provided with rotating blocks 24, and the rotating blocks 24 are fixed on the surface of the shell 6.

Specifically, when camera 13 carries out the recording, after strong sunlight shines the entering classroom to one side, form the light reflex on blackboard 4, erect light screen 7, it is fixed to form in the draw-in groove of fixture block 18 is gone into through rotating fixing clip pole 17 card, it is fixed simple convenient and fast, thereby make blackboard 4 reflection of light disappear, and light screen 7 erects the back, make blackboard 4's light not enough, there is the unclear condition of recorded broadcast, increase blackboard 4 luminance through LED lamp 8, can use when not being recorded broadcast blackboard 4, also can be when the light source is not enough at night, reinforce the light, after the recorded broadcast is accomplished, with it save into the computer, rethread projector 14 carries out the projection, open projection yardage roll 21, it is fixed with its projection yardage roll 21 edge through rotatory piece 24, it is simple quick.

Example 2

As an optional situation, please refer to fig. 1-2, a course playback system for education and teaching, a solar panel 12 is disposed on one side of a housing 6, a support mechanism 11 is disposed at a lower end of the solar panel 12, a battery cabinet 16 is disposed on an outer wall of one side of the housing 6, a battery pack is disposed inside the battery cabinet 16, the battery pack is electrically connected to the solar panel 12, and the battery pack is electrically connected to an LED lamp 8.

Specifically, the solar panel 12 collects solar energy, converts the solar energy into electric energy, and provides sufficient electric energy for the LED lamp 8, thereby achieving the purpose of saving energy.

The scheme in this embodiment can be selectively combined with the scheme in other embodiments.

Example 3

As an optional case, please refer to fig. 1-6, a course playback system for education and teaching, the supporting mechanism 11 includes a bottom plate 111 disposed on the ground, the upper end of the bottom plate 111 is provided with a support leg 112, the upper end of the support leg 112 is provided with a receiving box 113, the upper end of the receiving box 113 is provided with a cover plate 1110, the receiving box 113 is internally provided with a threaded screw 118, one end of the threaded screw 118 is provided with a rocking handle 119, the outside of the middle part of the threaded screw 118 is provided with a sliding block 117, and for the sliding block 117 to slide smoothly, the bottom of the sliding block 117 is provided; the upper end of the sliding block 117 is provided with a supporting rod 116, the upper end of the supporting rod 116 is provided with a rotating plate 114, and the upper end of the rotating plate 114 is provided with a second fixing mechanism 115.

Second fixing mechanism 115 includes fixed plate 1155 disposed on the surface of rotating plate 114, fixed rods 1156 are disposed on the lateral sides of fixed plate 1155, one end of fixed rod 1156 is provided with an extension rod 1157, an inner cavity 1151 is disposed inside one end of extension rod 1157 far from fixed plate 1155, a stretching rod 1152 is disposed in the middle of inner cavity 1151, a compression spring 1158 is disposed outside stretching rod 1152, a pressing plate 1159 is disposed at one end of stretching rod 1152, threaded holes 1154 are disposed inside fixed rod 1156 and extension rod 1157, and a threaded shaft 1153 is disposed inside threaded hole 1154 overlapped between fixed rod 1156 and extension rod 1157.

Specifically, the solar panel 12 is placed on the fixing plate 1155, the extension bar 1157 is adjusted according to the size of the solar panel 12 so as to match with the solar panel 12, after the adjustment is completed, the extension bar 1157 and the fixing rod 1156 are fixed through the matching of the threaded shaft 1153 and the threaded hole 1154, the fixing is simple and rapid, the compression plate 1159 is pulled by hand to stretch the compression spring 1158 under stress, the compression plate 1159 is released, the elastic force of the compression spring 1158 is enabled to fix the side edge of the solar panel 12, after the fixing is completed, the rocking handle 119 is shaken to enable the threaded screw rod 118 to rotate so as to enable the sliding block 117 to move forwards, the rotating plate 114 is supported through the supporting rod 116, the rotating plate 114 is adjusted to a proper angle and then the rocking handle 119 is fixed according to requirements, so that the solar panel 12 can better absorb solar energy, when the solar panel 12 is cleaned, the solar panel 12 can be retracted into the classroom storage box, get into receiver 113, cover apron 1110 again, effectively prevent that the dust from dropping on solar panel 12, influencing solar panel 12's efficiency.

Example 4

As an optional situation, please refer to fig. 1 and 7, a course playback system for education and teaching, a lower end of a placing plate 10 is provided with an adjusting rod 15, an outer portion of the adjusting rod 15 is provided with a fixed hollow rod 3, a lower end of the fixed hollow rod 3 is provided with a base 2, two sides of an outer wall of the adjusting rod 15 are provided with a plurality of groups of fixing holes 25, and an outer portion of the fixed hollow rod 3 is provided with a plurality of groups of first fixing mechanisms 5;

first fixed establishment 5 is including fixing the support frame 51 at fixed empty pole 3 outer wall, the middle part of support frame 51 is provided with horizontal pole 56, horizontal pole 56 runs through the outside one end of support frame 51 and is provided with and draws piece 57, horizontal pole 56 runs through the inboard one end of support frame 51 and is provided with round pin axle 52, round pin axle 52 runs through fixed empty pole 3 and stretches into in the fixed orifices 25, horizontal pole 56 is close to the one end outside of round pin axle 52 and is provided with spring 53, spring 53 one end is fixed on round pin axle 52, the other end is fixed on the support frame 51 inner wall, for the convenience stop its round pin axle 52 that pulls open, prevent round pin axle 52 return, be provided with fixed axle 55 on the inside wall of support frame 51.

Specifically, when needs height-adjusting, satisfy recorded broadcast and projected needs, make recorded broadcast and projected image more clear completion, be convenient for watch, the pulling draws piece 57, draw piece 57 to drive horizontal pole 56 and move to the outside, thereby make round pin axle 52 take out from fixed orifices 25, downwards rotate baffle 54 again and block round pin axle 52 and reset, the adjustment is accomplished the back, when fixed, upwards rotate baffle 54 again, make round pin axle 52 insert corresponding fixed orifices 25 under spring 53's elasticity effect, and is simple, convenient and fast, it is fixed firm.

Example 5

As an optional case, please refer to fig. 1, a course replaying system for education and teaching, wherein two side edges of the base 2 are respectively provided with a fixing frame 28, a threaded rod 27 is arranged in the middle of the fixing frame 28, a traveling wheel 29 is arranged at the lower end of the threaded rod 27, and a rotating disc 26 is fixed at the upper end of the threaded rod 27.

Specifically, move the device to relevant position through walking wheel 29, adjust recorded broadcast and projection distance, remove the transportation convenience, after arriving the destination, rotatory rolling disc 26 makes threaded rod 27 rotate and rises, and walking wheel 29 rises and makes base 2 and ground contact, and increase area of contact improves support stability, has guaranteed on the one hand to remove the transportation convenience, and on the other hand guarantees the stability when placing.

The working principle and the using process of the invention are as follows: when the invention is used, when strong sunlight is obliquely emitted into a classroom and reflected light is formed on the blackboard 4 when the camera 13 records, the shading plate 7 is erected and is clamped into the clamping groove of the clamping block 18 to be fixed by rotating the fixing clamping rod 17, the fixation is simple, convenient and quick, so that the blackboard 4 reflects light and disappears, and after the shading plate 7 is erected, the light of the blackboard 4 is insufficient, and the recorded broadcast is not clear, the brightness of the blackboard 4 is increased by the LED lamp 8, the invention can be used when the blackboard 4 is not recorded broadcast, and can also reinforce the light when the light source at night is insufficient, after the recorded broadcast is finished, the light is stored in a computer and is projected by the projector 14, the projection cloth roll 21 is opened, and the edge of the projection cloth roll 21 is fixed by the rotating block 24, thus the invention is simple and quick; the solar panel 12 collects solar energy, converts the solar energy into electric energy, and provides sufficient electric energy for the LED lamp 8, thereby achieving the purpose of saving energy; the solar panel 12 is placed on the fixing plate 1155, the extension rod 1157 is adjusted according to the size of the solar panel 12 so as to be matched with the solar panel 12, after adjustment is completed, the extension rod 1157 and the fixing rod 1156 are fixed through the matching of the threaded shaft 1153 and the threaded hole 1154, fixing is simple and rapid, the compression spring 1158 is stressed and stretched through pulling the compression plate 1159 by hands, the compression plate 1159 is released, the elastic force of the compression spring 1158 is enabled to be fixed on the side edge of the solar panel 12, after fixing is completed, the rocking handle 119 is shaken to enable the threaded screw rod 118 to rotate so as to enable the sliding block 117 to move forwards, the rotating plate 114 is supported through the supporting rod 116, the rotating plate 114 is adjusted to be at a proper angle and then the rocking handle 119 is fixed according to requirements, so that the solar panel 12 can better absorb solar energy, when classroom cleaning is performed, the solar panel 12 can be retracted into the storage box, the solar panel enters the storage box 113, and the cover plate 1110 is covered, so that dust is effectively prevented from falling on the solar panel 12 and affecting the efficiency of the solar panel 12; when the height needs to be adjusted, the recording and broadcasting and projection needs are met, the recorded and broadcasting and projection images are clearer and are convenient to watch, the pulling block 57 is pulled, the pulling block 57 drives the cross rod 56 to move outwards, thereby the pin 52 is drawn out from the fixing hole 25, the baffle 54 is rotated downwards to stop the pin 52 from resetting, after the adjustment is finished, the baffle 54 is rotated upwards when the fixing is finished, the pin shaft 52 is inserted into the corresponding fixing hole 25 under the elastic force of the spring 53, which is simple, convenient and fast, and is fixed firmly, the device is moved to a corresponding position through the travelling wheels 29, the recording and broadcasting and projection distances are adjusted, the movement and the transportation are convenient, after the device reaches the destination, rotatory rolling disc 26 makes threaded rod 27 rotate and rises, and walking wheel 29 rises and makes base 2 and ground contact, increases area of contact, improves support stability, has guaranteed on the one hand to remove the transportation convenient, and on the other hand guarantees the stability when placing.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A course playback system for education and teaching, comprising a blackboard (4), a camera (13) and a projector (14), characterized in that: blackboard (4) sets up the place ahead in camera (13) and projecting apparatus (14), the avris of blackboard (4) is provided with frame (1), the back of blackboard (4) is provided with casing (6), the surperficial both sides of casing (6) all are provided with recess (9), recess (9) inner wall articulates there is light screen (7), the surface of light screen (7) is provided with LED lamp (8), the back of light screen (7) is provided with fixture block (18), be provided with the draw-in groove on fixture block (18), recess (9) internal hinge has fixed kelly (17), camera (13) are provided with the lower extreme of projecting apparatus (14) and place board (10).

2. The lesson playback system for educational teaching according to claim 1, wherein: one side of casing (6) is provided with solar panel (12), the lower extreme of solar panel (12) is provided with supporting mechanism (11), be provided with battery on one side outer wall of casing (6) and place cabinet (16), storage battery has been put to the inside of battery placing cabinet (16), storage battery and solar panel (12) electricity are connected, storage battery and LED lamp (8) electricity are connected.

3. The lesson playback system for educational teaching according to claim 1, wherein: the top both sides of blackboard (4) are provided with two sets of supporting seats (22), supporting seat (22) are fixed on casing (6) surface, and are two sets of be provided with pivot (19) between supporting seat (22), the surface of pivot (19) is connected with projection yardage roll (21), the output of projection yardage roll (21) is provided with handle frame (20), the outer end of pivot (19) is provided with changes (23), the both sides of blackboard (4) are provided with rotatory piece (24), rotatory piece (24) are fixed on casing (6) surface.

4. The lesson playback system for educational teaching according to claim 2, wherein: supporting mechanism (11) is including setting up subaerial bottom plate (111), the upper end of bottom plate (111) is provided with stabilizer blade (112), the upper end of stabilizer blade (112) is provided with receiver (113), the upper end of receiver (113) is provided with apron (1110), the inside of receiver (113) is provided with screw lead screw (118), the one end of screw lead screw (118) is provided with rocking handle (119), the outside of screw lead screw (118) middle part is provided with sliding block (117), the upper end of sliding block (117) is provided with bracing piece (116), the upper end of bracing piece (116) is provided with rotor plate (114), the upper end of rotor plate (114) is provided with second fixed establishment (115).

5. The lesson playback system for educational teaching according to claim 4, wherein: the second fixing mechanism (115) comprises a fixing plate (1155) arranged on the surface of the rotating plate (114), fixing rods (1156) are arranged on the side edges of the fixing plate (1155), an extension rod (1157) is arranged at one end of each fixing rod (1156), an inner cavity (1151) is formed in one end, far away from the fixing plate (1155), of the extension rod (1157), a stretching rod (1152) is arranged in the middle of the inner cavity (1151), a compression spring (1158) is arranged outside the stretching rod (1152), a pressing plate (1159) is arranged at one end of the stretching rod (1152), threaded holes (1154) are formed in the fixing rod (1156) and the extension rod (1157), and a threaded shaft (1153) is arranged in the threaded hole (1154) overlapped between the fixing rod (1156) and the extension rod (1157).

6. The lesson playback system for educational teaching according to claim 4, wherein: the bottom of the sliding block (117) is provided with a sliding groove.

7. The lesson playback system for educational teaching according to claim 1, wherein: an adjusting rod (15) is arranged at the lower end of the placing plate (10), a fixed hollow rod (3) is arranged outside the adjusting rod (15), a base (2) is arranged at the lower end of the fixed hollow rod (3), a plurality of groups of fixing holes (25) are formed in two sides of the outer wall of the adjusting rod (15), and a plurality of groups of first fixing mechanisms (5) are arranged outside the fixed hollow rod (3);

first fixed establishment (5) are including fixing support frame (51) at fixed idle pole (3) outer wall, the middle part of support frame (51) is provided with horizontal pole (56), the outside one end that support frame (51) were run through in horizontal pole (56) is provided with draws piece (57), the inboard one end that support frame (51) were run through in horizontal pole (56) is provided with round pin axle (52), round pin axle (52) run through fixed idle pole (3) and stretch into fixed orifices (25), the one end outside that horizontal pole (56) are close to round pin axle (52) is provided with spring (53), spring (53) one end is fixed on round pin axle (52), and the other end is fixed on support frame (51) inner wall.

8. The lesson playback system for educational teaching according to claim 7, wherein: both sides limit of base (2) all is provided with mount (28), the centre of mount (28) is provided with threaded rod (27), the lower extreme of threaded rod (27) is provided with walking wheel (29), the upper end of threaded rod (27) is fixed with rolling disc (26).

9. The lesson playback system for educational teaching according to claim 7, wherein: a fixing shaft (55) is arranged on the inner side wall of the support frame (51), and a baffle (54) is rotatably connected to one end, far away from the support frame (51), of the fixing shaft (55).