CN114801554B

CN114801554B - Public multi-functional teaching device of english

Info

Publication number: CN114801554B
Application number: CN202210552082.5A
Authority: CN
Inventors: 张晨
Original assignee: Jian College
Current assignee: Jian College
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2023-01-17
Anticipated expiration: 2042-05-18
Also published as: CN114801554A

Abstract

The invention provides a public English multifunctional teaching device, which comprises a frame, wherein supporting rods are symmetrically and fixedly arranged at the bottom of the frame, supporting frames are fixedly arranged at the bottom of the supporting rods, an expanding mechanism is arranged between the supporting frames and the supporting rods, and first fixing blocks are symmetrically and fixedly arranged at the two sides of the frame; people move the transform to the handwriting pad of this device and the position of display screen when, people adjust the position of handwriting pad and display screen through the remote controller, can realize the transform of handwriting pad and display screen position mode through slip elevating gear and transmission, realize the different usage pattern of this device, have improved the convenience of people's study, make things convenient for the student to watching of handwriting pad and display screen.

Description

Public multi-functional teaching device of english

Technical Field

The invention relates to the technical field of public English teaching, in particular to a public English multifunctional teaching device.

Background

The public English generally refers to national English level examinations and is a national English level examination system designed and responsible by an examination center of an education department. Present public english teaching institution can use the handwriting board to carry out teacher's expression of writing and normal teaching training at the teaching in-process, but along with the improvement of people's science and technology teaching level, the teacher can carry out computer lecture through the form that uses from online PPT of downloading, but current computer and handwriting board all are solitary fix on the wall or place subaerial, can not remove, inconvenient to the teaching and the removal of teaching point in some small-size lecture places.

Therefore, it is necessary to provide a public english multifunctional teaching device to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides a convenient and mobile public English multifunctional teaching device which can simultaneously carry out writing teaching and computer teaching.

The invention provides a public English multifunctional teaching device which comprises a frame, wherein support rods are symmetrically and fixedly installed at the bottom of the frame, a support frame is fixedly installed at the bottom of each support rod, an expanding mechanism is installed between each support frame and each support rod, first fixed blocks are symmetrically and fixedly installed at the positions of two sides of the frame, first limiting rods are fixedly installed between the two first fixed blocks through bolts, a handwriting board is slidably installed between the two first limiting rods, connecting rods are symmetrically and fixedly installed at two ends of the handwriting board through bolts, one end, far away from the handwriting board, of each connecting rod is integrally and fixedly installed with a first limiting block, a first limiting hole is formed in the position, corresponding to the first limiting rods, of each first limiting block, the first limiting holes are slidably connected with the first limiting rods, a cleaning mechanism is fixedly installed at one side of the handwriting board, fixed plates are symmetrically and fixedly installed in the middle of the inner wall of the frame, a mounting plate is slidably installed at one side, far away from the frame, a display screen is slidably installed in the middle of the mounting plate, a sliding lifting device for moving the display screen is installed between the display screen and a sliding lifting device for realizing that the handwriting board and the expanding device can be used for people when people can move the handwriting board. Meanwhile, the positions of the handwriting board and the display screen can be moved through the transmission device and the sliding lifting device, so that the handwriting board and the display screen can be conveniently used and adjusted by people.

Preferably, the expansion mechanism comprises a through groove, a fixing rod, an extension rod, a positioning hole, a bump, a positioning plate, a through hole, a spring, a first fixture block, a second fixture block and a clamping groove, the through groove is formed in the middle of the support frame, the fixing rod is fixedly mounted at the two ends of the support frame close to the position symmetry of the through groove, the extension rod is slidably mounted inside the through groove, the positioning hole is formed in one end of the extension rod, the positioning hole is slidably connected with the fixing rod, the bump which is flush with the bottom of the support frame is fixedly mounted at the bottom of the end, away from the positioning hole, of the extension rod, the positioning plate is fixedly mounted at the middle of the support frame symmetrically, the through hole is formed in the middle of the positioning plate, the spring is fixedly mounted between the extension rods, the spring penetrates through holes, the first fixture block is fixedly mounted at the top of the end, away from the positioning hole, the second fixture block is fixedly mounted at the two sides of the support rod, the clamping groove is formed in the middle of the second fixture block, and the first fixture block is clamped with the clamping groove. When removing this device, through pulling extension rod and rotation decline extension rod, drive the draw-in groove department of first fixture block card in the second fixture block, realize accomodating the location to the position of extension rod, make things convenient for people to the removal of device, when fixing the device position, press close to the locating plate through the one end that drives the extension rod, realize the position location to the extension rod, realize the support to this device.

Preferably, the positioning hole is tightly attached to the fixing rod to slide. The stability of the extension rod sliding outside the fixed rod is improved.

Preferably, clearance mechanism includes second fixed block, second gag lever post, removal frame, the spacing hole of second, handle, mounting groove and blackboard eraser, the both ends symmetry fixed mounting of handwriting pad has the second fixed block, two fixed mounting has the second gag lever post, two between the second fixed block slidable mounting has the removal frame between the second gag lever post, the spacing hole of second has been seted up to the both ends symmetry of removal frame, the spacing hole of second and second gag lever post sliding connection, one side middle part fixed mounting of removal frame has the handle, the mounting groove has been seted up to one side that the handle was kept away from to the removal frame, the position fixed mounting that the removal frame corresponds the mounting groove has the blackboard eraser, the surface laminating setting of blackboard eraser and handwriting pad. When the device is used, the moving frame is driven to move along the second limiting rod by pulling the handle, the blackboard eraser can be driven to clean the surface of the handwriting board, and the device is convenient for people to use.

Preferably, a dust storage box is fixedly mounted at the bottom of the handwriting board. The dust after the writing board is wiped can be collected, and the dust is prevented from splashing.

Preferably, slip elevating gear includes first linear guide, slide opening, slide bar, installation pole, track board, first slider and track groove, one side fixed mounting that the frame was kept away from to the fixed plate has first linear guide, the symmetry of position fixed mounting that one side of mounting panel corresponds the fixed plate has first slider, first slider and first linear guide sliding connection, the slide opening has been seted up to the four corners symmetry of mounting panel, the symmetry of position fixed mounting that one side of display screen corresponds the slide opening has the slide bar, slide bar and slide opening sliding connection, one side middle part fixed mounting that the display screen is close to the slide bar has the installation pole, one side fixed mounting of installation pole has the track pole, the inner wall middle part fixed mounting of frame has the track board, the track groove has been seted up at the middle part of track board, track groove and track pole sliding connection. When the display screen is driven to move through the operation of the transmission device, the display screen slides along the track groove on the track plate through the track rod, then the display screen is driven to move to one side of the handwriting plate firstly and then to move to the bottom of the handwriting plate, and meanwhile the display screen is driven to be level with the handwriting plate, so that people can use the handwriting board.

Preferably, the turning part of the track groove is provided with a chamfer. The rail rod can move smoothly at the turning position.

Preferably, the track groove is closely attached to the track rod to slide. The stability of the track rod moving in the track groove is realized.

Preferably, the transmission device comprises a second linear guide rail, a second slider, a motor, a first bevel gear, a rotating rod, a second bevel gear, a first belt pulley, a second belt pulley, a transmission belt and a transmission rod, the second linear guide rail is symmetrically and fixedly installed at the two ends of the frame close to the handwriting board, the second slider is symmetrically and fixedly installed at the position of the handwriting board corresponding to the second linear guide rail, the second slider is connected with the second linear guide rail in a sliding manner, the motor is symmetrically and fixedly installed on the inner wall of one side of the frame, the first bevel gear is fixedly installed at the output end of the motor, the rotating rod is fixedly installed at the position of the two ends of the frame corresponding to the first bevel gear, the second bevel gear is fixedly installed at the one end of the rotating rod, the second bevel gear is meshed with the first bevel gear, the first belt pulley is fixedly installed at the middle part of the rotating rod, the second belt pulley is rotatably installed at the position of the lower end of the frame corresponding to the first belt pulley, the transmission belt is installed between the second belt and the first belt, the top of the transmission belt is fixedly connected with the handwriting board, the two ends of the transmission rod are symmetrically and fixedly installed at the bottom of the transmission belt. When people move and change the positions of the handwriting board and the display screen of the device, people adjust the positions of the handwriting board and the display screen through the remote controller, so that the position modes of the handwriting board and the display screen are changed, and different use modes of the device are realized.

Preferably, the motor is a servo motor. And realizing the moving progress of the handwriting board and the display screen.

Compared with the related art, the invention has the following beneficial effects:

when the device is used, the extension rod can be accommodated and positioned at the position through the expansion mechanism, the support of the device is realized, and people can conveniently move the device;

the surface of the handwriting board can be cleaned and wiped by driving the blackboard eraser by pulling the handle, so that the use of people is facilitated;

through being connected display screen and network, carry out teacher's the expression of writing and normal teaching training through writing by hand, download the PPT from the net through the display screen and carry out the lecture, the variety of people to public english study has been improved, people are when the position to the handwriting pad of this device and display screen removes the transform, people adjust the position of handwriting pad and display screen through the remote controller, can realize the transform of handwriting pad and display screen position mode through slip elevating gear and transmission, realize the different user mode of this device, the convenience of people's study has been improved, make things convenient for the student to watching of handwriting pad and display screen.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic illustration of the explosive structure of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic view of a portion of the cleaning mechanism of the present invention;

FIG. 5 is a schematic view of a partial explosion according to the present invention;

FIG. 6 is a second schematic diagram of a partial explosion structure according to the present invention;

FIG. 7 is a third schematic diagram of a partial explosion structure according to the present invention;

fig. 8 is a schematic diagram of a remote controller according to the present invention.

Reference numbers in the figures: 1. a frame; 2. a support bar; 3. a support frame; 4. an expansion mechanism; 5. a first fixed block; 6. a first limit rod; 7. a handwriting board; 8. a connecting rod; 9. a first stopper; 10. a first limit hole; 11. a cleaning mechanism; 12. a fixing plate; 13. mounting a plate; 14. a display screen; 15. a sliding lifting device; 16. a transmission device; 41. a through groove; 42. fixing the rod; 43. an extension pole; 44. positioning holes; 45. a bump; 46. positioning a plate; 47. a through hole; 48. a spring; 49. a first clamping block; 410. a second fixture block; 411. a card slot; 111. a second fixed block; 112. a second limiting rod; 113. a movable frame; 114. a second limiting hole; 115. a handle; 116. mounting grooves; 117. a blackboard eraser; 17. a dust storage box; 151. a first linear guide rail; 152. a slide hole; 153. a slide bar; 154. mounting a rod; 155. a track rod; 156. a track plate; 157. a first slider; 158. a track groove; 161. a second linear guide rail; 162. a second slider; 163. a motor; 164. a first bevel gear; 165. a rotating rod; 166. a second bevel gear; 167. a first pulley; 168. a second pulley; 169. a drive belt; 1610. and a transmission rod.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Please refer to fig. 1 to 8 in combination, a public english multifunctional teaching device, including frame 1, bottom symmetry fixed mounting of frame 1 has bracing piece 2, bottom fixed mounting of bracing piece 2 has support frame 3, install expansion mechanism 4 between support frame 3 and the bracing piece 2, both sides position symmetry fixed mounting of frame 1 has first fixed block 5, there is first gag lever post 6 through bolt fixed mounting between two first fixed blocks 5, slidable mounting has handwriting pad 7 between two first gag lever posts 6, there is connecting rod 8 at the both ends of handwriting pad 7 through bolt symmetry fixed mounting, the one end integral type fixed mounting that connecting rod 8 kept away from handwriting pad 7 has first stopper 9, first stopper 9 has seted up first spacing hole 10 corresponding to the position of first gag lever post 6, first spacing hole 10 and first gag lever post 6 sliding connection, one side fixed mounting of handwriting pad 7 has cleaning mechanism 11, the inner wall middle part symmetry fixed mounting of frame 1 has fixed plate 12, one side slidable mounting panel 13 that two fixed plates 12 kept away from frame 1 has, the middle part slidable mounting panel 13 has display screen 14, install the slide device that is used for display screen 14 to remove between display screen 14 and the fixed plate 12, the slide device 15 that is used for carrying on the display screen 14 and carry out relative mounting between display screen 14 and the display screen 16. When the device is used, the device can be supported through the expanding mechanism 4, the device can be placed, the storage of the device can be realized through the support frame 3, the device can be conveniently moved by people, and when the handwriting board 7 is moved, the handwriting board 7 can slide along the outer side of the first limiting rod 6. Meanwhile, the positions of the handwriting board 7 and the display screen 14 can be moved through the transmission device 16 and the sliding lifting device 15, so that the use and the adjustment of people are facilitated.

Referring to fig. 1 to 8, the expanding mechanism 4 includes a through slot 41, a fixing rod 42, an extension rod 43, a positioning hole 44, a protrusion 45, a positioning plate 46, a through hole 47, a spring 48, a first block 49, a second block 410 and a clamping slot 411, the through slot 41 is formed in the middle of the support frame 3, the fixing rods 42 are symmetrically and fixedly mounted at positions, close to the through slot 41, of two ends of the support frame 3, the extension rod 43 is slidably mounted inside the through slot 41, the positioning hole 44 is formed in one end of the extension rod 43, the positioning hole 44 is slidably connected with the fixing rod 42, the protrusion 45 which is flush with the bottom of the support frame 3 is fixedly mounted at the bottom of one end, far away from the positioning hole 44, of the extension rod 43, the positioning plate 46 is symmetrically and fixedly mounted at the middle of the support frame 3, the through hole 47 is formed in the middle of the positioning plate 46, the spring 48 is fixedly mounted between the two extension rods 43, the spring 48 passes through the through hole 47, the top of one end, far away from the positioning hole 44, the extension rod 43 is fixedly mounted with the first block 49, the second block 410 is symmetrically and fixedly mounted at two sides of the support rod 2, the second block 410 is mounted at the middle of the second block 411, and the first block 49 is clamped with the clamping slot 411. When moving this device, through pulling extension rod 43 in the inside slip that leads to groove 41, back rotation and decline extension rod 43, drive the draw-in groove 411 department of first fixture block 49 card in second fixture block 410, the draw-in groove 411 department of first fixture block 49 chucking in second fixture block 410 is driven to the pulling force through spring 48, the realization is accomodate the location to the position of extension rod 43, make things convenient for people to the removal of device, when fixing the device position, through pulling extension rod 43, cancel the draw-in groove 411 department of first fixture block 49 card in second fixture block 410, back rotation extension rod 43 drives extension rod 43 and is in horizontal position inside leading to groove 41, the locating plate 46 is pressed close to the one end that drives extension rod 43 through spring 48, the realization is to the position location of extension rod 43, the realization is to the support of this device.

Referring to fig. 1 to 8, the positioning hole 44 is closely attached to the fixing rod 42 for sliding. The stability of the extension rod 43 sliding outside the fixing rod 42 is improved.

Referring to fig. 1 to 8, the cleaning mechanism 11 includes a second fixing block 111, a second limiting rod 112, a moving frame 113, a second limiting hole 114, a handle 115, a mounting groove 116, and a blackboard eraser 117, where the second fixing block 111 is symmetrically and fixedly mounted at two ends of the handwriting board 7, the second limiting rod 112 is fixedly mounted between the two second fixing blocks 111, the moving frame 113 is slidably mounted between the two second limiting rods 112, the second limiting holes 114 are symmetrically formed at two ends of the moving frame 113, the second limiting hole 114 is slidably connected with the second limiting rod 112, the handle 115 is fixedly mounted in the middle of one side of the moving frame 113, the mounting groove 116 is formed at one side of the moving frame 113 far from the handle 115, the blackboard eraser 117 is fixedly mounted at a position of the moving frame 113 corresponding to the mounting groove 116, and the blackboard eraser 117 is attached to the surface of the handwriting board 7. When the device is used, the moving frame 113 is driven to move along the second limiting rod 112 by pulling the handle 115, so that the blackboard eraser 117 can be driven to clean and wipe the surface of the handwriting board 7, and the device is convenient for people to use.

Referring to fig. 1 to 8, a dust storage box 17 is fixedly mounted at the bottom of the writing pad 7. The dust wiped by the writing pad 7 can be collected, and the dust can be prevented from splashing.

Referring to fig. 1 to 8, the sliding lifting device 15 includes a first linear guide rail 151, a sliding hole 152, a sliding rod 153, a mounting rod 154, a rail rod 155, a rail plate 156, and a first slider 157, the first linear guide rail 151 is fixedly mounted on one side of the fixing plate 12 away from the frame 1, the first slider 157 is symmetrically and fixedly mounted on one side of the mounting plate 13 corresponding to the position of the fixing plate 12, the first slider 157 is slidably connected to the first linear guide rail 151, the sliding hole 152 is symmetrically formed in four corners of the mounting plate 13, the sliding rod 153 is symmetrically and fixedly mounted on one side of the display screen 14 corresponding to the position of the sliding hole 152, the sliding rod 153 is slidably connected to the sliding hole 152, the mounting rod 154 is fixedly mounted in the middle of one side of the display screen 14 close to the sliding rod 153, the rail rod 155 is fixedly mounted on one side of the mounting rod 154, the rail plate 156 is fixedly mounted in the middle of the inner wall of the frame 1, the rail plate 156 is formed in the middle of the rail plate 158, and the rail groove 158 is slidably connected to the rail rod 155. When the display screen 14 is driven to move by the operation of the transmission device 16, the first slider 157 on the mounting plate 13 slides along the first linear guide rail 151 to drive the display screen 14 to move, at this time, the track rod 155 installed on one side of the display screen 14 slides along the track groove 158 on the track plate 156, the track arrangement of the track groove 158 drives the slide rod 153 on the display screen 14 to slide along the slide hole 152, and then the display screen 14 is driven to move to one side of the handwriting board 7 and then to the bottom of the handwriting board 7, and simultaneously the display screen 14 is driven to be level with the handwriting board 7, so that the use of people is realized.

Referring to fig. 1 to 8, a turning point of the track groove 158 is formed with a chamfer. Facilitating smooth movement of the track rod 155 at the turn.

Referring to fig. 1 to 8, the rail groove 158 is closely attached to the rail rod 155 for sliding. Stability of the movement of the rail bar 155 inside the rail groove 158 is achieved.

Referring to fig. 1 to 8, the transmission device 16 includes a second linear guide 161, a second slider 162, a motor 163, a first bevel gear 164, a rotating rod 165, a second bevel gear 166, a first pulley 167, a second pulley 168, a transmission belt 169 and a transmission rod 1610, the second linear guide 161 is symmetrically and fixedly installed at a position where two ends of the frame 1 are close to the handwriting board 7, the second slider 162 is symmetrically and fixedly installed at a position where the handwriting board 7 corresponds to the second linear guide 161, the second slider 162 is slidably connected to the second linear guide 161, the motor 163 is symmetrically and fixedly installed on an inner wall of one side of the frame 1, the first bevel gear 164 is fixedly installed at an output end of the motor 163, the rotating rod 165 is fixedly installed at a position where two ends of the frame 1 correspond to the first bevel gear 164, the gear 166 is fixedly installed at one end of the rotating rod 165, the second bevel gear 166 is engaged with the first bevel gear 164, the first pulley 167 is fixedly installed at a middle portion of the rotating rod 165, the second pulley 168 is rotatably installed at a position where the lower end of the frame 1 corresponds to the first bevel gear 164, the transmission belt 167 is installed, the transmission belt 169 is fixedly installed at a position where the second pulley 167, the transmission belt is connected to the transmission belt 169, and a section of the transmission rod 169 is connected to the transmission rod 13, and a section of the transmission belt 169 is installed at a section of the bottom of the transmission rod 169 is connected to the transmission rod 1610. When people move and change the positions of the handwriting board 7 and the display screen 14 of the device, people adjust the positions of the handwriting board 7 and the display screen 14 through the remote controller, in the process, the remote controller controls the motor 163 to operate to drive the first bevel gear 164 to rotate, the rotating rod 165 is driven to rotate through the engagement of the second bevel gear 166 and the first bevel gear 164, the first belt pulley 167 is driven to rotate, the second belt pulley 168 and the first belt pulley 167 are driven through the transmission belt 169 to move, the transmission belt 169 is driven to move, the handwriting board 7 is driven to move along the track of the second linear guide rail 161, the display screen 14 is driven to move through the operation of the sliding lifting device 15, the position modes of the handwriting board 7 and the display screen 14 are changed, and different modes of the device are realized.

Referring to fig. 1 to 8, the motor 163 is a servo motor. The progress of the movement of the tablet 7 and the display 14 is achieved.

The working principle is as follows: when the device is used, the display screen 14 is connected with the network, the teacher's writing expression and normal teaching training are carried out through the handwriting board 7, the PPT is downloaded from the network through the display screen 14 for lecturing, the diversity of public English learning of people is improved, when the device is moved, the extension rod 43 slides in the through groove 41 by pulling, the extension rod 43 rotates and descends to drive the first clamping block 49 to be clamped at the clamping groove 411 in the second clamping block 410, the first clamping block 49 is driven to be clamped at the clamping groove 411 in the second clamping block 410 by the pulling force of the spring 48, the position of the extension rod 43 is stored and positioned, the device is convenient to move by people, when the position of the device is fixed, the clamping groove 411 of the first clamping block 49 in the second clamping block 410 is cancelled by pulling the extension rod 43, the extension rod 43 is driven to be in a horizontal position in the through groove 41 by rotating later, when the device is used, the handle 115 is pulled to drive the movable frame 113 to move along the second limiting rod 112, the blackboard eraser 117 can be driven to clean and wipe the surface of the handwriting board 7, so that people can use the device conveniently, when people move and change the positions of the handwriting board 7 and the display screen 14 of the device, people adjust the positions of the handwriting board 7 and the display screen 14 through the remote controller, in the process, the motor 163 is controlled by the remote controller to operate to drive the first bevel gear 164 to rotate, the rotating rod 165 is driven to rotate through the meshing of the second bevel gear 166 and the first bevel gear 164, the first belt pulley 167 is driven to rotate, and the second belt pulley 168 and the first belt pulley 167 are driven to transmit through the transmission belt 169, the movement of the transmission belt 169 is realized, so that the handwriting board 7 is driven to move along the track of the second linear guide rail 161, meanwhile, the display screen 14 is driven to move by sliding along the first linear guide rail 151 through the first sliding block 157 on the mounting plate 13, at this time, the track rod 155 arranged on one side of the display screen 14 slides along the track groove 158 on the track plate 156, the slide rod 153 on the display screen 14 is driven to slide along the slide hole 152 through the track arrangement of the track groove 158, and then the display screen 14 is driven to move to one side of the handwriting board 7 and then to the bottom of the handwriting board 7, and meanwhile, the display screen 14 is driven to be level with the handwriting board 7, so that the position modes of the handwriting board 7 and the display screen 14 are changed, and different modes of the device are realized.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a multi-functional teaching device of public english, includes frame (1), its characterized in that, the bottom symmetry fixed mounting of frame (1) has bracing piece (2), the bottom fixed mounting of bracing piece (2) has support frame (3), install expansion mechanism (4) between support frame (3) and bracing piece (2), the bilateral position symmetry fixed mounting of frame (1) has first fixed block (5), two there is first gag lever post (6) through bolt fixed mounting between first fixed block (5), two slidable mounting has handwriting pad (7) between first gag lever post (6), there are connecting rod (8) at the both ends of handwriting pad (7) through bolt symmetry fixed mounting, the one end integral type fixed mounting that handwriting pad (7) were kept away from in connecting rod (8) has first stopper (9), first stopper (9) have seted up first spacing hole (10) corresponding the position of first gag lever post (6), first spacing hole (10) and first gag lever post (6) slidable connection, one side fixed mounting of handwriting pad (7) has clearance mechanism (11), the fixed mounting panel (1) has two fixed mounting panels (12) is kept away from to the middle part of frame (12), a display screen (14) is slidably mounted in the middle of the mounting plate (13), a sliding lifting device (15) used for moving the display screen (14) is mounted between the display screen (14) and the fixing plate (12), and a transmission device (16) used for enabling the handwriting board (7) and the display screen (14) to move relatively is mounted among the frame (1), the handwriting board (7) and the display screen (14);

the expanding mechanism (4) comprises a through groove (41), a fixing rod (42), an extension rod (43), a positioning hole (44), a bump (45), a positioning plate (46), a through hole (47), a spring (48), a first clamping block (49), a second clamping block (410) and a clamping groove (411), the through groove (41) is formed in the middle of the support frame (3), the fixing rod (42) is symmetrically and fixedly installed at the position, close to the through groove (41), of the two ends of the support frame (3), the extension rod (43) is slidably installed in the through groove (41), the positioning hole (44) is formed in one end of the extension rod (43), the positioning hole (44) is slidably connected with the fixing rod (42), the bump (45) which is flush with the bottom of the support frame (3) is fixedly installed at the bottom of one end, far away from the positioning hole (44), of the positioning plate (46) is symmetrically and fixedly installed in the middle of the support frame (3), the through hole (47) is formed in the middle of the positioning plate (46), the spring (48) is fixedly installed between the two extension rods (43), the spring (48) passes through hole (47), the top of the first clamping block (49) is fixedly installed at one end, far away from the extension rod (43), second clamping blocks (410) are symmetrically and fixedly installed on two sides of the supporting rod (2), a clamping groove (411) is formed in the middle of each second clamping block (410), and the first clamping block (49) is clamped with the clamping groove (411);

the sliding lifting device (15) comprises a first linear guide rail (151), a sliding hole (152), a sliding rod (153), a mounting rod (154), a track rod (155), a track plate (156), a first sliding block (157) and a track groove (158), wherein the first linear guide rail (151) is fixedly mounted on one side, away from the frame (1), of the fixing plate (12), the first sliding block (157) is symmetrically and fixedly mounted on one side of the mounting plate (13) corresponding to the position of the fixing plate (12), the first sliding block (157) is slidably connected with the first linear guide rail (151), the sliding hole (152) is symmetrically formed in four corners of the mounting plate (13), the sliding rod (153) is symmetrically and fixedly mounted on one side of the display screen (14) corresponding to the position of the sliding hole (152), the sliding rod (153) is slidably connected with the sliding hole (152), the mounting rod (154) is fixedly mounted in the middle of one side, close to the sliding rod (153), the track rod (155) is fixedly mounted on one side of the mounting rod (154), the track plate (156) is fixedly mounted in the middle of the inner wall of the frame (1), and the track plate (156) is connected with the track groove (158);

the track groove (158) is tightly attached to the track rod (155) to slide.

2. A multi-functional teaching device of public english according to claim 1, characterized in that, the locating hole (44) and the fixing rod (42) are closely attached and slide.

3. The multifunctional public English teaching device according to claim 1, wherein the cleaning mechanism (11) comprises a second fixed block (111), a second limiting rod (112), a moving frame (113), a second limiting hole (114), a handle (115), an installation groove (116) and a blackboard eraser (117), the second fixed block (111) is symmetrically and fixedly installed at two ends of the handwriting board (7), the second limiting rod (112) is fixedly installed between the second fixed blocks (111), the moving frame (113) is slidably installed between the second limiting rods (112), the second limiting hole (114) is symmetrically formed at two ends of the moving frame (113), the second limiting hole (114) is slidably connected with the second limiting rod (112), the handle (115) is fixedly installed in the middle of one side of the moving frame (113), the installation groove (116) is formed in one side of the moving frame (113) far away from the handle (115), the position of the moving frame (113) corresponding to the installation groove (116) is fixedly installed with the blackboard eraser (117), and the surface of the blackboard eraser (117) is attached to the handwriting board (7).

4. A multifunctional teaching device for public english according to claim 3, characterized in that a dust storage box (17) is fixedly mounted on the bottom of the writing pad (7).

5. The multifunctional teaching device for public english according to claim 1, characterized in that the turning point of the track groove (158) is chamfered.

6. The multifunctional teaching device for public english according to claim 1, characterized in that the transmission device (16) comprises a second linear guide (161), a second slider (162), a motor (163), a first bevel gear (164), a rotating rod (165), a second bevel gear (166), a first belt pulley (167), a second belt pulley (168), a transmission belt (169) and a transmission rod (1610), wherein the second linear guide (161) is symmetrically and fixedly installed at the position where the two ends of the frame (1) are close to the handwriting board (7), the second slider (162) is symmetrically and fixedly installed at the position where the handwriting board (7) corresponds to the second linear guide (161), the second slider (162) is slidably connected with the second linear guide (161), the motor (163) is symmetrically and fixedly installed on the inner wall of one side of the frame (1), the first bevel gear (164) is fixedly installed at the output end of the motor (163), the rotating rod (165) is fixedly installed at the position where the two ends of the frame (1) correspond to the first bevel gear (164), the rotating rod (165) is fixedly installed at the position where the second bevel gear (166) is engaged with the second bevel gear (167), the second bevel gear (166) is installed at the middle of the second pulley (165), and the second bevel gear (166) is connected with the lower end of the second bevel gear (165), and the second bevel gear (166), the rotating rod (166) is installed at the middle of the second bevel gear (165) and connected with the frame (1) Belt pulley (168), drive belt (169) are installed in the transmission between second belt pulley (168) and first belt pulley (167), one section and handwriting pad (7) fixed connection in top of drive belt (169), the both ends symmetry fixed mounting of mounting panel (13) has transfer line (1610), the bottom fixed connection of mounting panel (13) is kept away from with transfer line (1610) to one section in the bottom of drive belt (169).

7. A multifunctional public English teaching device according to claim 6, wherein said motor (163) is a servo motor.