CN114801554B - A multifunctional teaching device for public English - Google Patents

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

A multifunctional teaching device for public English

technical field

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

Background technique

Public English generally refers to the national English proficiency test, which is a national English proficiency test system designed and responsible by the Ministry of Education's Examination Center. The current public English teaching institutions will use the handwriting board for the teacher's writing expression and normal teaching training in the teaching process. However, with the improvement of people's teaching level of science and technology, the teacher will use the computer to give lectures in the form of downloading PPT from the Internet. However, existing computers and handwriting boards are all independently fixed on the wall or placed on the ground, and cannot be moved. It is inconvenient to teach some small-scale lectures and move teaching points.

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

Contents of the invention

In order to solve the above technical problems, the present invention provides a convenient mobile public English multifunctional teaching device that can simultaneously teach writing and computer teaching.

A public English multifunctional teaching device provided by the present invention comprises a frame, the bottom of the frame is symmetrically fixed with a support rod, the bottom of the support rod is fixedly mounted with a support frame, and a There is an expansion mechanism, the first fixed blocks are fixed and fixed symmetrically on both sides of the frame, and the first limit rods are installed between the two first fixed blocks through bolts, and the two first limit rods A handwriting board is slidably installed between them, the two ends of the handwriting board are symmetrically fixed with connecting rods by bolts, and the end of the connecting rod far away from the handwriting board is integrally fixed with a first stopper, and the first stopper The position corresponding to the first limit rod of the block is provided with a first limit hole, and the first limit hole is slidably connected with the first limit rod, and a cleaning mechanism is fixedly installed on one side of the tablet, and a cleaning mechanism is fixed on the side of the frame. The middle part of the inner wall is symmetrically fixed with a fixed plate, the two fixed plates are slidably installed on the side away from the frame, and the middle part of the mounting plate is slidably installed with a display screen. The sliding lifting device for the movement of the display screen, the transmission device for the relative movement of the writing board and the display screen is installed between the frame, the tablet and the display screen. When in use, the device can be supported by the expansion mechanism to realize the The placement of the device can also be realized by the support frame to facilitate the movement of the device. When the position of the handwriting board is moved, the handwriting board will slide along the outside of the first stop bar. At the same time, the position of the handwriting board and the display screen can be moved through the transmission device and the sliding lifting device, which is convenient for people to use and adjust.

Preferably, the expansion mechanism includes a through slot, a fixing rod, an extension rod, a positioning hole, a protrusion, a positioning plate, a through hole, a spring, a first block, a second block and a slot, and the middle part of the support frame There is a through groove, the two ends of the support frame close to the position of the through groove are symmetrically fixed with fixed rods, the inside of the through groove is slidingly installed with an extension rod, and one end of the extension rod is provided with a positioning hole, and the positioning The hole is slidably connected with the fixed rod, and the bottom of the end of the extension rod away from the positioning hole is fixedly installed with a bump flat with the bottom of the support frame. The middle part of the support frame is symmetrically fixed with a positioning plate. A through hole, a spring is fixedly installed between the two extension rods, the spring is set through the through hole, a first block is fixedly installed on the top of the end of the extension rod away from the positioning hole, and the two sides of the support rod A second clamping block is symmetrically and fixedly installed, and a clamping slot is opened in the middle of the second clamping block, and the first clamping block is engaged with the clamping slot. When moving the device, by pulling the extension rod and turning the extension rod down, the first block is driven to be stuck in the slot in the second block to realize the storage and positioning of the extension rod, which is convenient for people to move the device. When fixing the position of the device, by driving one end of the extension rod close to the positioning plate, the position positioning of the extension rod is realized, and the support for the device is realized.

Preferably, the positioning hole closely fits and slides with the fixing rod. Improves the stability of the extension rod sliding on the outside of the fixed rod.

Preferably, the cleaning mechanism includes a second fixed block, a second limit rod, a moving frame, a second limit hole, a handle, a mounting groove and a blackboard eraser, and the two ends of the tablet are symmetrically fixed with a second fixed block, a second limit rod is fixedly installed between the two second fixed blocks, a moving frame is slidably installed between the two second limit rods, two ends of the moving frame are symmetrically provided with second A limit hole, the second limit hole is slidably connected with the second limit rod, a handle is fixedly installed in the middle of one side of the mobile frame, and a mounting groove is opened on the side of the mobile frame away from the handle. A blackboard eraser is fixedly installed at the position corresponding to the mounting groove on the frame, and the blackboard eraser is attached to the surface of the handwriting board. When the device is in use, by pulling the handle, the mobile frame is driven to move along the second limit rod, and the blackboard eraser can be driven to clean and wipe the surface of the handwriting board, which is convenient for people to use.

Preferably, a dust storage box is fixedly installed on the bottom of the tablet. The dust after wiping the handwriting board can be collected to prevent the dust from splashing.

Preferably, the sliding lifting device includes a first linear guide rail, a sliding hole, a sliding bar, a mounting bar, a track bar, a track plate, a first slider and a track groove, and the side of the fixing plate away from the frame is fixedly installed with The first linear guide rail, one side of the installation plate corresponding to the position of the fixed plate is symmetrically fixed with a first slider, the first slider is slidably connected to the first linear guide rail, and the four corners of the installation plate are symmetrically opened There is a slide hole, and a slide bar is fixed and fixed symmetrically to the position corresponding to the slide hole on one side of the display screen, and the slide bar is slidably connected to the slide hole, and a mounting rod is fixedly installed in the middle of the side of the display screen close to the slide bar, A track bar is fixedly installed on one side of the installation bar, a track plate is fixedly installed in the middle part of the inner wall of the frame, and a track groove is opened in the middle part of the track plate, and the track groove is slidably connected with the track bar. When the operation of the transmission device drives the display screen to move, the track rod slides along the track groove on the track plate, and then the display screen is first moved to the side of the tablet and then to the bottom of the tablet, and at the same time, the display screen and the tablet are driven. The handwriting tablet is flat to realize people's use.

Preferably, chamfers are provided at the turning points of the track grooves. Facilitate the smooth movement of the track rod at the turning point.

Preferably, the track groove closely fits and slides with the track rod. Realize the stability of the track rod moving inside the track groove.

Preferably, the transmission device includes a second linear guide rail, a second slider, a motor, a first bevel gear, a rotating rod, a second bevel gear, a first pulley, a second pulley, a transmission belt and a transmission rod, and the frame The two ends of the handwriting board are symmetrically and fixedly installed with a second linear guide rail, and the position of the writing board corresponding to the second linear guide rail is symmetrically fixed with a second slider, and the second slider slides with the second linear guide rail. connected, the inner wall of one side of the frame is fixedly mounted with a motor symmetrically, the output end of the motor is fixedly mounted with a first bevel gear, and the two ends of the frame are fixedly mounted with a rotating rod corresponding to the position of the first bevel gear. One end of the rotating rod is fixedly installed with a second bevel gear, and the second bevel gear is engaged with the first bevel gear, and the middle part of the rotating rod is fixedly installed with a first pulley, and the lower end of the frame corresponds to the position of the first pulley A second pulley is installed for rotation, and a transmission belt is installed between the second pulley and the first pulley. The top section of the transmission belt is fixedly connected with the handwriting board, and the two ends of the installation board are symmetrically fixed with transmission rods. , the bottom section of the transmission belt is fixedly connected to the bottom of the transmission rod away from the mounting plate. When people move and transform the positions of the handwriting pad and the display screen of the device, people adjust the positions of the handwriting pad and the display screen through the remote controller, so as to realize the conversion of the position modes of the handwriting pad and the display screen, and realize different usage modes of the device.

Preferably, the motor is a servo motor. Realize the mobile progress of the tablet and display.

Compared with related technologies, the present invention provides the following beneficial effects:

When the present invention is used, the extension mechanism can be used to realize the storage and positioning of the extension rod, realize the support of the device, and facilitate people to move the device;

By pulling the handle, the blackboard eraser can be driven to clean and wipe the surface of the handwriting board, which is convenient for people to use;

By connecting the display screen to the network, the teacher's writing expression and normal teaching training are carried out by handwriting, and the PPT is downloaded from the Internet through the display screen to give lectures, which improves the diversity of people's learning of public English. People are using the handwriting board of this device When moving and changing the position of the display screen, people adjust the position of the tablet and the display screen through the remote control, and the position mode of the tablet and the display screen can be changed by sliding the lifting device and the transmission device, and realize different use modes of the device. The convenience of people's learning is improved, and it is convenient for students to watch the handwriting board and the display screen.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of an explosion structure of the present invention;

Fig. 3 is the enlarged view of place A in Fig. 2;

Fig. 4 is the partial structure schematic diagram of cleaning mechanism of the present invention;

Fig. 5 is one of the schematic diagrams of the partial explosion structure of the present invention;

Fig. 6 is the second schematic diagram of partial explosion structure of the present invention;

Fig. 7 is the third schematic diagram of partial explosion structure of the present invention;

FIG. 8 is a schematic diagram of the remote controller of the present invention.

Symbols in the figure: 1, frame; 2, support rod; 3, support frame; 4, expansion mechanism; 5, first fixed block; 6, first limit rod; 7, handwriting board; 8, connecting rod; The first limit block; 10, the first limit hole; 11, the cleaning mechanism; 12, the fixed plate; 13, the installation plate; 14, the display screen; 42, fixed rod; 43, extension rod; 44, positioning hole; 45, bump; 46, positioning plate; 47, through hole; 48, spring; 49, first block; 410, second block; 411, Card slot; 111, second fixed block; 112, second limit rod; 113, mobile frame; 114, second limit hole; 115, handle; 116, installation groove; 117, blackboard eraser; 17, dust storage box ; 151, the first linear guide rail; 152, slide hole; 153, slide bar; 154, mounting bar; Linear guide rail; 162, the second slide block; 163, motor; 164, the first bevel gear; 165, the rotating rod; 166, the second bevel gear; 167, the first pulley; 168, the second pulley; 169, transmission belt; 1610, transmission rod.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to Fig. 1 to Fig. 8, a kind of public English multifunctional teaching device, comprises frame 1, and the bottom of frame 1 is symmetrically fixedly installed with support rod 2, and the bottom of support rod 2 is fixedly installed with support frame 3, and support frame 3 and An expansion mechanism 4 is installed between the support rods 2, and a first fixed block 5 is installed symmetrically on both sides of the frame 1, and a first limit rod 6 is installed between the two first fixed blocks 5 by bolts. A handwriting board 7 is slidably installed between the first limiting rods 6, the two ends of the handwriting board 7 are symmetrically fixed with a connecting rod 8 by bolts, and the end of the connecting rod 8 away from the handwriting board 7 is integrally fixed with a first limiting block 9. The position of the first limit block 9 corresponding to the first limit rod 6 is provided with a first limit hole 10, the first limit hole 10 is slidingly connected with the first limit rod 6, and one side of the tablet 7 is fixedly installed There is a cleaning mechanism 11, the middle part of the inner wall of the frame 1 is symmetrically fixed with a fixed plate 12, and the side of the two fixed plates 12 away from the frame 1 is slidably installed with a mounting plate 13, and the middle part of the mounting plate 13 is slidably installed with a display screen 14, the display screen 14 and the fixed plate 12 are installed with the sliding lifting device 15 that is used for display screen 14 to move, and between frame 1, tablet 7 and display screen 14, the transmission device 16 that is used for tablet 7 and display screen 14 to move relative to is installed. When the device is in use, the device can be supported by the expansion mechanism 4 to realize the placement of the device, and the storage of the device can also be realized through the support frame 3, which is convenient for people to move the device. When moving the handwriting board 7 positions, The handwriting board 7 will slide along the outside of the first limiting rod 6 . At the same time, the positions of the handwriting tablet 7 and the display screen 14 can be moved through the transmission device 16 and the sliding lifting device 15, which is convenient for people to use and adjust.

Please refer to FIG. 1 to FIG. 8 , the expansion mechanism 4 includes a through slot 41, a fixed 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 block 49, The second block 410 and the slot 411, the middle part of the support frame 3 is provided with a through groove 41, the two ends of the support frame 3 are symmetrically fixed with the fixed rod 42 near the position of the through groove 41, and the inside of the through groove 41 is slidingly installed with an extension Rod 43, one end of extension rod 43 is provided with positioning hole 44, and positioning hole 44 is slidably connected with fixed rod 42, and the bottom of one end of extension rod 43 away from positioning hole 44 is fixedly installed with the bump 45 that is flat with support frame 3 bottoms, and support frame The middle part of 3 is symmetrically fixed with a positioning plate 46, and the middle part of the positioning plate 46 is provided with a through hole 47, and a spring 48 is fixedly installed between the two extension rods 43, and the spring 48 is arranged through the through hole 47, and the extension rod 43 is away from the positioning hole The top of one end of 44 is fixedly installed with the first block 49, and the two sides of the support rod 2 are symmetrically fixed with the second block 410, and the middle part of the second block 410 is provided with a slot 411, the first block 49 and the slot 411 card connection. When the device is moved, the extension rod 43 is pulled to slide inside the through groove 41, and then the extension rod 43 is rotated and lowered to drive the first block 49 to be stuck in the slot 411 in the second block 410, and the spring The pulling force of 48 drives the first block 49 to be clamped at the slot 411 in the second block 410, so as to realize the storage and positioning of the extension rod 43, which is convenient for people to move the device. When the position of the device is fixed, through Pull the extension bar 43 to cancel the first block 49 stuck in the slot 411 in the second block 410, then turn the extension bar 43 to drive the extension bar 43 to be in a horizontal position inside the through groove 41, and the tension of the spring 48 drives the extension One end of the rod 43 is close to the positioning plate 46 to realize the position positioning of the extension rod 43 and realize the support of the device.

Please refer to FIG. 1 to FIG. 8 together, the positioning hole 44 and the fixing rod 42 are closely fitted and slide. The stability of the extension rod 43 sliding outside the fixed rod 42 is improved.

Please refer to Fig. 1 to Fig. 8, the cleaning mechanism 11 includes a second fixed block 111, a second stop rod 112, a moving frame 113, a second stop hole 114, a handle 115, a mounting groove 116 and a blackboard eraser 117, a handwriting board The two ends of 7 are symmetrically fixed with a second fixed block 111, a second stop rod 112 is fixedly installed between the two second fixed blocks 111, and a moving frame 113 is slidably installed between the two second stop rods 112, Both ends of the mobile frame 113 are symmetrically provided with a second limit hole 114, the second limit hole 114 is slidingly connected with the second limit rod 112, a handle 115 is fixedly installed in the middle part of one side of the mobile frame 113, and the mobile frame 113 is away from the handle One side of 115 is provided with installation groove 116, and the position of mobile frame 113 corresponding installation groove 116 is fixedly installed with blackboard eraser 117, and the surface of blackboard eraser 117 and handwriting board 7 is bonded and arranged. When the device is in use, by pulling the handle 115, the moving frame 113 is driven to move along the second limit rod 112, and the blackboard eraser 117 can be driven to clean and wipe the surface of the handwriting board 7, which is convenient for people to use.

Please refer to FIG. 1 to FIG. 8 in combination, a dust storage box 17 is fixedly installed on the bottom of the tablet 7 . The dust after wiping the handwriting board 7 can be collected to prevent dust from splashing.

Please refer to Fig. 1 to Fig. 8, slide lifting device 15 comprises first linear guide rail 151, slide hole 152, slide bar 153, mounting bar 154, track bar 155, track plate 156 and first slide block 157, fixed plate 12 A first linear guide rail 151 is fixedly installed on the side away from the frame 1, and a first slider 157 is fixedly installed symmetrically on one side of the mounting plate 13 corresponding to the position of the fixed plate 12. The first slider 157 and the first linear guide rail 151 Sliding connection, the four corners of the mounting plate 13 are symmetrically provided with sliding holes 152, one side of the display screen 14 corresponding to the position of the sliding hole 152 is symmetrically fixed with a sliding rod 153, the sliding rod 153 is slidingly connected with the sliding hole 152, and the display screen 14 is close to the sliding hole 152. One side middle part of bar 153 is fixedly installed with installation rod 154, and one side of installation rod 154 is fixedly installed with track bar 155, and the middle part of inner wall of frame 1 is fixedly installed with track plate 156, and the middle part of track plate 156 offers track groove 158, and track The groove 158 is slidably connected with the track bar 155 . When the operation of the transmission device 16 drives the display screen 14 to move, the movement of the display screen 14 will be driven by the first slider 157 on the mounting plate 13 sliding along the first linear guide rail 151. The track rod 155 will slide along the track groove 158 on the track plate 156, and the track setting of the track groove 158 will drive the slide bar 153 on the display screen 14 to slide along the slide hole 152, and then will drive the display screen 14 to move to the handwriting position first. One side of board 7 moves to the bottom of handwriting board 7 after, drives display screen 14 and handwriting board 7 to be equal at the same time, realizes people's use.

Please refer to FIG. 1 to FIG. 8 together, the turning point of the track groove 158 is chamfered. It is convenient for the smooth movement of the track bar 155 at the turning point.

Please refer to FIG. 1 to FIG. 8 in conjunction, the track groove 158 and the track rod 155 closely fit and slide. The stability of the movement of the track rod 155 inside the track groove 158 is realized.

Please refer to Fig. 1 to Fig. 8, transmission device 16 comprises second linear guide rail 161, second slide block 162, motor 163, first bevel gear 164, rotating rod 165, second bevel gear 166, first pulley 167, the first Two pulleys 168, transmission belt 169 and transmission rod 1610, the two ends of frame 1 are close to the position symmetrical fixed installation of handwriting board 7 second linear guide rail 161, the position symmetrical fixed installation of handwriting board 7 corresponding second linear guide rail 161 has the first Two sliders 162, the second slider 162 is slidingly connected with the second linear guide rail 161, a motor 163 is symmetrically fixedly installed on one side of the inner wall of the frame 1, and a first bevel gear 164 is fixedly installed on the output end of the motor 163, and the two sides of the frame 1 The position corresponding to the first bevel gear 164 at the end is fixedly equipped with a rotating rod 165, and one end of the rotating rod 165 is fixedly installed with a second bevel gear 166, the second bevel gear 166 is engaged with the first bevel gear 164, and the middle part of the rotating rod 165 is fixed. The first pulley 167 is installed, and the position of the lower end of the frame 1 corresponding to the first pulley 167 is rotated with a second pulley 168, and a transmission belt 169 is installed between the second pulley 168 and the first pulley 167, and a section of the top of the transmission belt 169 Fixedly connected with the handwriting board 7, the two ends of the mounting plate 13 are symmetrically fixedly equipped with a transmission rod 1610, and the bottom section of the transmission belt 169 is fixedly connected with the bottom of the transmission rod 1610 away from the mounting plate 13. 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. During this process, the motor 163 is controlled by the remote controller to drive the first The bevel gear 164 rotates, and the meshing of the second bevel gear 166 and the first bevel gear 164 will drive the rotating rod 165 to rotate, and then the first pulley 167 will be driven to rotate, and the transmission belt 169 will connect the second pulley 168 to the first pulley 167. Transmission is carried out between, realize the movement of transmission belt 169, and then will drive tablet 7 to move along the track of second linear guide rail 161, will drive the movement of display screen 14 through the operation of sliding lifting device 15, realize handwriting panel 7 and display The conversion of screen 14 position modes realizes different modes of this device.

Please refer to FIG. 1 to FIG. 8 in conjunction, the motor 163 is a servo motor. Realize the moving progress of tablet 7 and display screen 14.

Working principle: when the device is in use, by connecting the display screen 14 to the network, the teacher's writing expression and normal teaching training are carried out through the handwriting board 7, and the PPT is downloaded from the Internet through the display screen 14 to give lectures, which improves people's understanding of public English. Diversity of learning, when moving the device, pull the extension rod 43 to slide inside the through slot 41, then turn and lower the extension rod 43 to drive the first block 49 to be stuck in the slot in the second block 410 At 411, the pulling force of the spring 48 drives the first clamping block 49 to be locked in the clamping groove 411 in the second clamping block 410, so as to realize the storage and positioning of the extension rod 43, which is convenient for people to move the device. When fixing, by pulling the extension bar 43, cancel the first block 49 stuck in the draw-in groove 411 in the second block 410, and then turn the extension bar 43 to drive the extension bar 43 to be in a horizontal position inside the through groove 41, and the spring will The pulling force of 48 drives one end of the extension bar 43 to be close to the positioning plate 46, realizes the position positioning of the extension bar 43, and realizes the support to the device. 112 moves, and can drive blackboard eraser 117 to clean and wipe the surface of handwriting board 7, convenient for people's use, when people are moving and transforming the positions of handwriting board 7 and display screen 14 of this device, people adjust handwriting board 7 by remote controller and the position of the display screen 14, during this process, the operation of the motor 163 is controlled by the remote controller to drive the first bevel gear 164 to rotate, and the meshing between the second bevel gear 166 and the first bevel gear 164 will drive the rotating rod 165 to rotate, and then It will drive the first pulley 167 to rotate, and the transmission belt 169 will drive between the second pulley 168 and the first pulley 167 to realize the movement of the transmission belt 169, and then drive the tablet 7 to move along the track of the second linear guide rail 161 At the same time, the first slider 157 on the mounting plate 13 slides along the first linear guide rail 151 to drive the movement of the display screen 14. At this time, the track rod 155 installed on one side of the display screen 14 will follow the track bar 156 on the track plate 156. The track groove 158 slides, and the track setting of the track groove 158 will drive the slide bar 153 on the display screen 14 to slide along the slide hole 152, and then will drive the display screen 14 to move to the side of the tablet 7 and then move to the tablet 7 At the same time, it drives the display screen 14 to be flat with the handwriting board 7, so as to realize the conversion of the handwriting board 7 and the display screen 14 position modes, and realize different modes of the device.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (7)

1. A public English multifunctional teaching device, comprising a frame (1), characterized in that, the bottom of the frame (1) is symmetrically fixed with support rods (2), and the bottom of the support rods (2) is fixedly installed There is a support frame (3), an expansion mechanism (4) is installed between the support frame (3) and the support rod (2), and a first fixed block (5) is installed symmetrically on both sides of the frame (1). ), a first limiting rod (6) is installed between the two first fixing blocks (5) by bolts, and a handwriting board (7) is slidingly installed between the two first limiting rods (6) ), the two ends of the writing board (7) are symmetrically fixed with a connecting rod (8) by bolts, and the end of the connecting rod (8) away from the writing board (7) is integrally fixed with a first stopper ( 9), the first limit block (9) is provided with a first limit hole (10) corresponding to the position of the first limit rod (6), and the first limit hole (10) is connected with the first limit The rod (6) is slidingly connected, a cleaning mechanism (11) is fixedly installed on one side of the handwriting board (7), and a fixed plate (12) is fixedly installed symmetrically in the middle of the inner wall of the frame (1). A mounting plate (13) is slidably installed on the side of the plate (12) away from the frame (1), and a display screen (14) is slidably installed in the middle of the mounting plate (13), and the display screen (14) and the fixed plate ( 12) A sliding lifting device (15) for the movement of the display screen (14) is installed between the frame (1), the handwriting board (7) and the display screen (14) for the handwriting board (7) and the display screen (14). The transmission device (16) for relative movement of the display screen (14); The expansion mechanism (4) includes a through slot (41), a fixed rod (42), an extension rod (43), a positioning hole (44), a bump (45), a positioning plate (46), a through hole (47), Spring (48), first block (49), second block (410) and slot (411), the middle part of the support frame (3) is provided with a through slot (41), the support frame (3) ) is symmetrically fixed with a fixed rod (42) near the position of the through groove (41), and an extension rod (43) is slidably installed inside the through groove (41), and one end of the extension rod (43) is opened There is a positioning hole (44), the positioning hole (44) is slidingly connected with the fixed rod (42), and the bottom of the end of the extension rod (43) away from the positioning hole (44) is fixedly installed to be flat with the bottom of the support frame (3). The middle part of the support frame (3) is symmetrically fixed with a positioning plate (46), the middle part of the positioning plate (46) is provided with a through hole (47), and the two extension rods ( 43) is fixedly installed with a spring (48), the spring (48) is set through the through hole (47), and the top of the end of the extension rod (43) away from the positioning hole (44) is fixedly installed with the first block (49), the two sides of the support rod (2) are symmetrically fixed with the second block (410), the middle part of the second block (410) is provided with a slot (411), the first block The block (49) and the card slot (411) are clamped; 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 track rod (155), a track plate (156), a first The slider (157) and the track groove (158), the first linear guide rail (151) is fixedly installed on the side of the fixed plate (12) away from the frame (1), and the side of the mounting plate (13) corresponds to The position of the fixed plate (12) is symmetrically fixed with the first slider (157), the first slider (157) is slidingly connected with the first linear guide rail (151), and the four corners of the mounting plate (13) are symmetrical A sliding hole (152) is opened, and a sliding rod (153) is fixedly fixed on one side of the display screen (14) corresponding to the position of the sliding hole (152), and the sliding rod (153) slides with the sliding hole (152) connection, the middle part of the display screen (14) close to the slide bar (153) is fixedly installed with a mounting rod (154), and one side of the mounting rod (154) is fixedly mounted with a track rod (155), and the frame (1) A track plate (156) is fixedly installed in the middle of the inner wall, and a track groove (158) is opened in the middle of the track plate (156), and the track groove (158) is slidingly connected with the track rod (155); The track groove (158) closely fits and slides with the track bar (155). 2 . The public English multifunctional teaching device according to claim 1 , characterized in that, the positioning hole ( 44 ) closely fits and slides with the fixing rod ( 42 ). 3. A public English multifunctional teaching device according to claim 1, characterized in that the cleaning mechanism (11) includes a second fixed block (111), a second limit rod (112), a moving frame ( 113), the second limiting hole (114), the handle (115), the installation groove (116) and the blackboard eraser (117), and the two ends of the writing board (7) are symmetrically fixed with the second fixing block (111) , a second limit rod (112) is fixedly installed between the two second fixed blocks (111), and a moving frame (113) is slidably installed between the two second limit rods (112), so Both ends of the moving frame (113) are symmetrically provided with second limiting holes (114), the second limiting holes (114) are slidingly connected with the second limiting rod (112), and the moving frame (113) A handle (115) is fixedly installed in the middle of one side, and a mounting groove (116) is opened on the side of the moving frame (113) away from the handle (115), and the moving frame (113) corresponds to the position of the mounting groove (116) A blackboard eraser (117) is fixedly installed, and the blackboard eraser (117) is attached to the surface of the handwriting board (7). 4. A public English multifunctional teaching device according to claim 3, characterized in that a dust storage box (17) is fixedly installed on the bottom of the handwriting board (7). 5. The public English multifunctional teaching device according to claim 1, characterized in that, the turning point of the track groove (158) is provided with a chamfer. 6. A public English multifunctional teaching device according to claim 1, characterized in that the transmission device (16) includes a second linear guide rail (161), a second slider (162), a motor (163) , the first bevel gear (164), the rotating rod (165), the second bevel gear (166), the first pulley (167), the second pulley (168), the transmission belt (169) and the transmission rod (1610), so The two ends of the frame (1) close to the handwriting board (7) are symmetrically and fixedly installed with the second linear guide rail (161), and the position of the handwriting board (7) corresponding to the second linear guide rail (161) is symmetrically fixed and installed with the second linear guide rail (161). Two sliders (162), the second slider (162) is slidingly connected with the second linear guide rail (161), and a motor (163) is symmetrically fixed on one side of the inner wall of the frame (1), and the motor ( 163) is fixedly installed with a first bevel gear (164), the two ends of the frame (1) corresponding to the position of the first bevel gear (164) are fixedly installed with a rotating rod (165), and the rotating rod (165 ) is fixedly installed with a second bevel gear (166), the second bevel gear (166) is meshed with the first bevel gear (164), and the middle part of the rotating rod (165) is fixed with a first pulley ( 167), the lower end of the frame (1) corresponds to the position of the first pulley (167) and the second pulley (168) is installed in rotation, and the transmission between the second pulley (168) and the first pulley (167) is installed with The transmission belt (169), the top section of the transmission belt (169) is fixedly connected with the handwriting board (7), the two ends of the installation plate (13) are symmetrically fixed with transmission rods (1610), and the transmission belt ( The bottom section of 169) is fixedly connected with the bottom of the transmission rod (1610) away from the mounting plate (13). 7. A public English multifunctional teaching device according to claim 6, characterized in that the motor (163) is a servo motor.

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