Portable English teaching speech board

Abstract

The invention relates to the technical field of teaching aids, in particular to a portable English teaching lecture board which comprises a base, a mounting frame is welded to the top end of the base, a sliding rail is welded to the top end of the mounting frame, a lead screw A is rotationally arranged in the sliding rail, a sliding block is in threaded connection with the outer wall of the lead screw A, and a board body is rotationally arranged at one end of the sliding block. The motor is started, the lead screw A rotates, the sliding block is driven to vertically move in the sliding rail, the height of the plate body is accurately adjusted, teaching convenience is improved, when the height of the plate body is adjusted, the lead screw A drives the bevel gear to enable the lead screw B to rotate, the movable rod pushes the sliding rheostat sliding piece, the brightness and color temperature of the lamp strip are automatically adjusted, and it is guaranteed that the content of the plate body is clear and visible. In addition, when the plate body rises, a sliding block drives a lantern ring to enable a piston to move upwards, liquid flows into an air bag, a balancing weight is pushed, gas is compressed to a sleeve, an adjusting rod is promoted to drive the plate body to adjust the angle, watching differences of students are eliminated, and the teaching effect is comprehensively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching aids, and particularly to a portable English teaching lecture board. Background Art

[0002] In the current era of comprehensive innovation and development of education, English, as a globally common language, has attracted much attention to its teaching quality. Classroom teaching remains the key front for imparting and learning English knowledge, and the teaching board plays an indispensable role in the process of English teaching. Whether it is the explanation of vocabulary and grammar, the analysis of text content, or the writing demonstration of English sentence patterns, the teaching board is an important medium for teachers to convey information and has a direct impact on the learning effect of students.

[0003] However, the height adjustment and lighting of traditional lecture boards are independent functions. When a teacher adjusts the height of the lecture board, the lighting brightness does not change accordingly. In actual teaching, after the lecture board is raised, due to the increased viewing distance, the original lighting brightness may not be sufficient to clearly display the content, resulting in students having difficulty seeing English words, grammar explanations, text paragraphs, etc. on the lecture board, seriously affecting the learning effect.

[0004] In view of this, research and improvement are carried out on the existing problems, and a portable English teaching lecture board is provided, aiming to solve the problems and improve the practical value through this technology. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a portable English teaching lecture board.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: A portable English teaching lecture board, including a base, the top of the base is welded with a mounting frame, the top of the mounting frame is welded with a slide rail, a lead screw A is rotatably arranged inside the slide rail, a slider is threadedly connected to the outer wall of the lead screw A, one end of the slider is rotatably connected to a board body, a light supplement groove is formed at the border of the board body, and a light strip is installed on the inner wall of the light supplement groove; A brightness adjustment mechanism for adjusting the brightness of the board body is arranged at the top of the base. The brightness adjustment mechanism includes a housing, a sliding rheostat for controlling the magnitude of the current is installed inside the housing, a lead screw B is rotatably arranged on the inner wall of the mounting frame, and a moving rod for pushing the sliding piece of the sliding rheostat to move is threadedly connected to the surface of the lead screw B; The top end of the mounting frame is provided with an angle adjustment mechanism for adjusting the rotation of the plate body. The angle adjustment mechanism includes a box body welded to the bottom end of the base. An air bag is arranged inside the box body. A counterweight is arranged at one end of the air bag. A driving assembly for the air bag to expand is arranged on one side of the slider. A support block is welded to the top end of the mounting frame. A lifting column slides inside the support block. A rotating plate rotates inside the top end of the lifting column. A pneumatic assembly for adjusting the rotation of the rotating plate is arranged on one side of the lifting column.

[0007] Preferably, the brightness adjustment mechanism further includes a power supply installed at the top end of the base. The power supply is electrically connected to the sliding rheostat through a wire. One end of the sliding rheostat is electrically connected to the lamp through a wire.

[0008] Preferably, a motor is installed at the top end of the screw rod A. Universal wheels are installed around the bottom end of the base.

[0009] Preferably, a spring A is installed inside the box body. One end of the spring A is fixedly connected to one side of the counterweight, and the other end of the spring A is fixedly connected to the inner wall of the box body.

[0010] Preferably, the driving assembly includes a liquid storage pipe welded to one side of the slider. A piston slides inside the liquid storage pipe. The top end of the liquid storage pipe is communicated with an infusion pipe. One end of the infusion pipe is communicated with the air bag. A collar is sleeved on the outer wall of the liquid storage pipe. A plurality of groups of magnets are installed on the inner wall of the collar.

[0011] Preferably, the piston is made of a ferrite material, and a sealing ring is sleeved on the outer wall of the piston. The piston is magnetically connected to the magnet.

[0012] Preferably, the pneumatic assembly includes a sleeve installed on one side of the lifting column. An adjusting rod slides inside the sleeve. The top end of the adjusting rod is hinged to the bottom end of the rotating plate. The bottom end of the sleeve is communicated with an air delivery pipe. One end of the air delivery pipe is communicated with the inside of the box body. One end of the rotating plate is fixedly connected to the back of the plate body. A spring B is arranged inside the sleeve.

[0013] Preferably, an L-shaped sliding plate slides inside the box body. A moving wheel is arranged at the bottom end of the L-shaped sliding plate.

[0014] Preferably, conical gears that mesh with each other are sleeved on the outer walls of the screw rod A and the screw rod B.

[0015] Preferably, two groups of symmetrically arranged limiting plates are sleeved on the outer wall of the screw rod B. A limiting rod is fixedly connected between the two groups of limiting plates. The moving rod slides on the outer wall of the limiting rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In the process of height adjustment of the board body in the present invention, as the angle formed by the students' line of sight and the plane where the content of the board body is located changes, the intensity of light gradually weakens, and the teaching content such as words and charts on the board body will appear dim, making it difficult for students to see the details clearly and affecting information reception. By synchronously driving the bevel gear at the bottom end of the lead screw A to rotate through the lead screw A, the lead screw B is driven to rotate synchronously by the bevel gear. When the lead screw B rotates, the moving rod threadedly connected to the lead screw B will move along the axial direction of the lead screw B under the action of the threaded drive of the lead screw B. The movement of the moving rod ultimately pushes the sliding block of the rheostat to move, so that the resistance value of the rheostat connected to the circuit will change with the change of the position of the sliding block. When the resistance of the rheostat connected to the circuit changes, the magnitude of the current passing through the light strip will also change accordingly. When the board body rises, the illumination brightness automatically increases and the color temperature becomes bright white to adapt to a relatively long viewing distance; when the board body descends, the brightness weakens appropriately and the color temperature becomes warm yellow to create a comfortable local lighting environment. Thus, it can automatically and quickly adjust the supplementary light brightness of the board body, making the English teaching content on the board body always clearly visible, greatly improving the display effect of the board body and being conducive to improving the learning attention and learning effect of students.

[0018] 2. In the present invention, when the board body rises, the distance between the students and the board body increases. If the angle remains unchanged, the viewing angle of the students in the front row is limited and it is difficult to see the content clearly. Therefore, during the rising process of the board body, the slider drives the collar to move upward. Since the magnet on the inner wall of the collar is magnetically connected to the piston, the movement of the collar drives the piston to move upward synchronously inside the liquid storage tube. The piston compresses the liquid inside the liquid storage tube into the airbag through the infusion tube, causing the airbag to continuously expand. The expanding airbag pushes the counterweight block to move towards both sides inside the box body, thereby compressing the gas inside the box body into the inside of the sleeve through the air duct, increasing the air pressure inside the sleeve. The increased air pressure pushes the adjusting rod to move, causing the adjusting rod to drive the rotating plate to rotate, and the board body is driven to rotate through the rotating plate to achieve angle adjustment. Thus, when the board body rises, the angle can be automatically adjusted, ensuring that the students in the front row can also obtain a good viewing angle, effectively eliminating the viewing differences caused by different seating positions, enabling all students to clearly see the English teaching content displayed on the board body, and greatly improving the teaching effect.

[0019] 3. In the present invention, when it is necessary to adjust the height of the board body according to the teaching content, the motor is started. The operation of the motor drives the lead screw A to start rotating. Since the lead screw A is threadedly connected to the slider and the slider is restricted to move inside the slide rail, the rotation of the lead screw A can be converted into the linear movement of the slider along the vertical direction inside the slide rail, thereby realizing the adjustment of the height of the board body. Thus, the board body can be accurately adjusted to a height position suitable for teachers' teaching writing and students' viewing, improving the convenience and teaching effect during the teaching process. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the brightness adjustment mechanism of the present invention; Figure 3 is of the present invention Figure 2 schematic enlarged view of A therein; Figure 4 is a schematic diagram of the back structure of the present invention; Figure 5 is a schematic diagram of the structure of the angle adjustment mechanism of the present invention; Figure 6 is of the present invention Figure 5 schematic enlarged view of B therein; Figure 7 is of the present invention Figure 5 schematic enlarged view of C therein; Figure 8 is a schematic diagram of the overall structure of the adjustment plate of the present invention.

[0021] Legend: 1. Base; 2. Mounting frame; 3. Slide rail; 4. Lead screw A; 5. Slide block; 6. Lecture board; 7. Supplementary light slot; 8. Light strip; 9. Brightness adjustment mechanism; 901. Power supply; 902. Housing; 903. Slide rheostat; 904. Lead screw B; 905. Moving rod; 906. Limiting rod; 907. Bevel gear; 10. Angle adjustment mechanism; 1001. Box body; 1002. Air bag; 1003. Counterweight; 1004. Spring A; 1005. Liquid storage pipe; 1006. Piston; 1007. Infusion pipe; 1008. Collar; 1009. Magnet; 1010. Support block; 1011. Lifting column; 1012. Rotating plate; 1013. Sleeve; 1014. Adjusting rod; 1015. Air delivery pipe; 1016. L-shaped slide plate; 1017. Spring B; 11. Motor. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Refer to Figures 1 to 8As shown in the figure, the present invention provides a portable English teaching lecture board, which includes a base 1. An installation frame 2 is welded to the top of the base 1. A slide rail 3 is welded to the top of the installation frame 2. A lead screw A4 is rotatably installed inside the slide rail 3. A slider 5 is threadedly connected to the outer wall of the lead screw A4. One end of the slider 5 is rotatably connected to a plate body 6. A light supplement groove 7 is formed at the border of the plate body 6. A light strip 8 is installed on the inner wall of the light supplement groove 7; Refer to Figures 1 to 3 As shown in the figure, a brightness adjustment mechanism 9 for adjusting the brightness of the plate body 6 is provided at the top of the base 1. The brightness adjustment mechanism 9 includes a housing 902. A sliding rheostat 903 for controlling the magnitude of the current is installed inside the housing 902. A lead screw B904 is rotatably installed on the inner wall of the installation frame 2. A moving rod 905 for pushing the slide of the sliding rheostat 903 to move is threadedly connected to the surface of the lead screw B904; It should be noted that when it is necessary to adjust the height of the plate body 6 according to the teaching content, the motor 11 is started. The motor 11 runs to drive the lead screw A4 to start rotating. Since the lead screw A4 and the slider 5 are threadedly connected, and the slider 5 is restricted to move inside the slide rail 3, the rotation of the lead screw A4 can be converted into the linear movement of the slider 5 along the vertical direction inside the slide rail 3, thereby realizing the adjustment of the height of the plate body 6, so that the plate body 6 can be accurately adjusted to a height position suitable for teachers' teaching writing and students' viewing, improving the convenience and teaching effect in the teaching process; Moreover, during the process of adjusting the height of the plate body 6, since the angle formed by the students' line of sight and the plane where the content of the plate body 6 is located changes, the intensity of light will gradually weaken, and the teaching content such as words and charts on the plate body 6 will appear dim, and it is difficult for students to see the details clearly, affecting information reception. Therefore, the conical gear 907 at the bottom end of the lead screw A4 is driven to rotate synchronously by the lead screw A4. Because conical gears 907 meshing with each other are respectively sleeved on the outer walls of the lead screw A4 and the lead screw B904, when the conical gear 907 at the bottom end of the lead screw A4 rotates, it will drive the lead screw B904 to rotate synchronously through the conical gear 907. When the lead screw B904 rotates, the moving rod 905 threadedly connected to the lead screw B904 will move along the axial direction of the lead screw B904 under the action of the threaded drive of the lead screw B904. The movement of the moving rod 905 finally pushes the slide of the sliding rheostat 903 to move, so that the resistance value of the sliding rheostat 903 connected to the circuit will change with the change of the slide position. When the resistance of the sliding rheostat 903 connected to the circuit changes, the magnitude of the current passing through the light strip 8 will also change accordingly. When the plate body 6 rises, the illumination brightness automatically increases, and the color temperature becomes bright white to adapt to a farther viewing distance; when the plate body 6 descends, the brightness weakens appropriately, and the color temperature becomes warm yellow to create a comfortable local lighting environment, so that the supplementary light brightness of the plate body 6 can be automatically and quickly adjusted, making the English teaching content on the plate body 6 always clearly visible, greatly improving the display effect of the plate body 6, and being beneficial to improving the learning attention and learning effect of students.

[0024] Refer to Figures 4 to 7 As shown, at the top of the mounting frame 2, there is an angle adjustment mechanism 10 for adjusting the rotation of the adjusting plate body 6. The angle adjustment mechanism 10 includes a box body 1001 welded to the bottom end of the base 1. Inside the box body 1001, there is an airbag 1002. At one end of the airbag 1002, there is a counterweight 1003. On one side of the slider 5, there is a driving assembly for the airbag 1002 to expand. At the top of the mounting frame 2, there is a support block 1010 welded. Inside the support block 1010, a lifting column 1011 slides. Inside the top end of the lifting column 1011, a rotating plate 1012 rotates. On one side of the lifting column 1011, there is a pneumatic assembly for adjusting the rotation of the rotating plate 1012.

[0025] It should be noted that when the plate body 6 rises, the distance between the students and the plate body 6 increases. If the angle remains unchanged, the viewing angle of the students in the front row is limited and it is difficult to see the content clearly. Therefore, during the rising process of the plate body 6, the slider 5 drives the collar 1008 to move upward. Since the magnet 1009 on the inner wall of the collar 1008 is magnetically connected to the piston 1006, the movement of the collar 1008 drives the piston 1006 to move upward synchronously inside the liquid storage pipe 1005. Further, the piston 1006 compresses the liquid inside the liquid storage pipe 1005 through the liquid delivery pipe 1007 into the airbag 1002, causing the airbag 1002 to continuously expand. The expanding airbag 1002 pushes the counterweight 1003 to move towards both sides inside the box body 1001, thereby compressing the gas inside the box body 1001 through the air delivery pipe 1015 into the inside of the sleeve 1013, increasing the air pressure inside the sleeve 1013. The increased air pressure pushes the adjusting rod 1014 to move, causing the adjusting rod 1014 to drive the rotating plate 1012 to rotate. The plate body 6 is driven by the rotating plate 1012 to achieve angle adjustment, so as to automatically adjust the angle when the plate body 6 rises, ensuring that the students in the front row can also obtain a good viewing angle, effectively eliminating the viewing differences caused by different seat positions, enabling all students to clearly see the English teaching content displayed on the plate body 6, and greatly improving the teaching effect.

[0026] Refer to Figure 2 As shown, the brightness adjustment mechanism 9 further includes a power supply 901 installed at the top end of the base 1. The power supply 901 is electrically connected to the sliding rheostat 903 through a wire. One end of the sliding rheostat 903 is electrically connected to the light strip 8 through a wire.

[0027] Refer to Figure 1 As shown, at the top end of the lead screw A4, there is a motor 11. Universal wheels are installed around the bottom end of the base 1. The universal wheels enable the entire plate body 6 device to move easily and flexibly in the horizontal direction, improving the mobility of the plate body 6.

[0028] Refer to Figure 7As shown, a spring A1004 is installed inside the box body 1001. One end of the spring A1004 is fixedly connected to one side of the counterweight 1003, and the other end of the spring A1004 is fixedly connected to the inner wall of the box body 1001.

[0029] Refer to Figure 6 As shown, the drive assembly includes a liquid storage tube 1005 welded to one side of the slider 5. A piston 1006 slides inside the liquid storage tube 1005. The top of the liquid storage tube 1005 is connected to an infusion tube 1007. One end of the infusion tube 1007 is connected to the airbag 1002. A collar 1008 is sleeved on the outer wall of the liquid storage tube 1005, and multiple groups of magnets 1009 are installed on the inner wall of the collar 1008.

[0030] Refer to Figure 6 As shown, the piston 1006 is made of a ferrite material, and a sealing ring is sleeved on the outer wall of the piston 1006. The piston 1006 is magnetically connected to the magnet 1009.

[0031] Refer to Figures 4 to 6 As shown, the pneumatic assembly includes a sleeve 1013 installed on one side of the lifting column 1011. An adjusting rod 1014 slides inside the sleeve 1013. The top of the adjusting rod 1014 is hinged to the bottom end of the rotating plate 1012. The bottom end of the sleeve 1013 is connected to an air delivery pipe 1015. One end of the air delivery pipe 1015 is connected to the inside of the box body 1001. One end of the rotating plate 1012 is fixedly connected to the back of the plate body 6. A spring B1017 is provided inside the sleeve 1013.

[0032] Refer to Figure 6 As shown, an L-shaped sliding plate 1016 slides inside the box body 1001. Moving wheels are provided at the bottom end of the L-shaped sliding plate 1016. When the counterweight 1003 moves, the counterweight 1003 will push the L-shaped sliding plate 1016 to move away from both sides of the box body 1001, so as to be able to expand the support area of the base 1, and further improve the stability of the plate body 6.

[0033] Refer to Figure 2 As shown, conical gears 907 that mesh with each other are sleeved on the outer walls of the lead screw A4 and the lead screw B904.

[0034] Refer to Figure 3 As shown, two groups of symmetrically arranged limit plates are sleeved on the outer wall of the lead screw B904. A limit rod 906 is fixedly connected between the two groups of limit plates. The moving rod 905 slides on the outer wall of the limit rod 906.

[0035] Working principle: When in use, first move this device to the designated position. When it is necessary to adjust the height of the plate body 6 according to the teaching content, start the motor 11. The motor 11 runs to drive the lead screw A4 to start rotating. Since the lead screw A4 is threadedly connected to the slider 5 and the slider 5 is restricted to move within the slide rail 3, the rotation of the lead screw A4 can be converted into the linear movement of the slider 5 along the vertical direction inside the slide rail 3, thereby realizing the adjustment of the height of the plate body 6, so that the plate body 6 can be accurately adjusted to a height position suitable for teachers' teaching writing and students' viewing, improving the convenience and teaching effect in the teaching process; Moreover, during the process of adjusting the height of the plate body 6, as the angle formed by the students' line of sight and the plane where the content of the plate body 6 is located changes, the intensity of light will gradually weaken, and the teaching content such as words and charts on the plate body 6 will become dim, making it difficult for students to see the details clearly and affecting information reception. Therefore, the bevel gear 907 at the bottom end of the lead screw A4 is driven to rotate synchronously by the lead screw A4. Since bevel gears 907 that mesh with each other are sleeved on the outer walls of the lead screw A4 and the lead screw B904 respectively, when the bevel gear 907 at the bottom end of the lead screw A4 rotates, it will drive the lead screw B904 to rotate synchronously through the bevel gear 907. When the lead screw B904 rotates, the moving rod 905 threadedly connected to the lead screw B904 will move along the axial direction of the lead screw B904 under the action of the threaded drive of the lead screw B904. The movement of the moving rod 905 finally pushes the sliding piece of the sliding rheostat 903 to move, so that the resistance value of the sliding rheostat 903 connected to the circuit will change with the change of the sliding piece position. When the resistance of the sliding rheostat 903 connected to the circuit changes, the magnitude of the current passing through the light strip 8 will also change accordingly. When the plate body 6 rises, the illumination brightness automatically increases and the color temperature becomes bright white to adapt to a farther viewing distance; when the plate body 6 descends, the brightness weakens appropriately and the color temperature becomes warm yellow to create a comfortable local lighting environment, so that the supplementary light brightness of the plate body 6 can be automatically and quickly adjusted, making the English teaching content on the plate body 6 always clearly visible, greatly improving the display effect of the plate body 6, and being beneficial to improving the students' learning attention and learning effect; When the board body 6 rises, the distance between the students and the board body 6 increases. If the angle remains unchanged, the viewing angle of the students in the front row is limited and it is difficult to see the content clearly. Therefore, during the rising process of the board body 6, the slider 5 drives the collar 1008 to move upward. Since the magnet 1009 on the inner wall of the collar 1008 is magnetically connected to the piston 1006, the movement of the collar 1008 drives the piston 1006 to move upward synchronously inside the liquid storage tube 1005. Further, the piston 1006 compresses the liquid inside the liquid storage tube 1005 through the infusion tube 1007 into the airbag 1002, causing the airbag 1002 to continuously expand. The expanding airbag 1002 pushes the counterweight 1003 to move towards both sides inside the box body 1001, thereby compressing the gas inside the box body 1001 through the air delivery pipe 1015 into the inside of the sleeve 1013, increasing the air pressure inside the sleeve 1013. The increased air pressure pushes the adjusting rod 1014 to move, causing the adjusting rod 1014 to drive the rotating plate 1012 to rotate. The rotating plate 1012 drives the board body 6 to achieve angle adjustment, so as to automatically adjust the angle when the board body 6 rises, ensuring that the students in the front row can also obtain a good viewing angle, effectively eliminating the viewing differences caused by different seat positions, enabling all students to clearly see the English teaching content displayed on the board body 6, and greatly improving the teaching effect.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable English teaching speech board, comprising a base (1), characterized in that: A mounting frame (2) is welded to the top of the base (1), a slide rail (3) is welded to the top of the mounting frame (2), a screw rod A (4) is rotatably mounted inside the slide rail (3), a slider (5) is threadedly connected to the outer wall of the screw rod A (4), a plate body (6) is rotatably mounted at one end of the slider (5), a fill light groove (7) is provided at the frame of the plate body (6), and a light strip (8) is mounted on the inner wall of the fill light groove (7); The top of the base (1) is provided with a brightness adjustment mechanism (9) for adjusting the brightness of the plate body (6), the brightness adjustment mechanism (9) comprising a housing (902), a sliding rheostat (903) for controlling the magnitude of the current being installed inside the housing (902), a screw rod B (904) being rotatable on the inner wall of the mounting frame (2), a moving rod (905) for pushing the sliding plate of the sliding rheostat (903) to move being threadedly connected to the surface of the screw rod B (904); The top of the mounting frame (2) is provided with an angle adjustment mechanism (10) for adjusting the rotation of the plate body (6), the angle adjustment mechanism (10) comprising a box body (1001) welded to the bottom of the base (1), an air bag (1002) is provided inside the box body (1001), a counterweight (1003) is provided at one end of the air bag (1002), a driving component for expanding the air bag (1002) is provided on one side of the slider (5), a support block (1010) is welded on the top of the mounting frame (2), a lifting column (1011) is slidably provided inside the support block (1010), a rotating plate (1012) is rotatably provided inside the top of the lifting column (1011), and a pneumatic component for adjusting the rotation of the rotating plate (1012) is provided on one side of the lifting column (1011).

2. A portable English teaching speech board according to claim 1, characterized in that: The brightness adjustment mechanism (9) further comprises a power supply (901) mounted on the top of the base (1); the power supply (901) is electrically connected to the sliding rheostat (903) via a wire; and one end of the sliding rheostat (903) is electrically connected to the light strip (8) via a wire.

3. A portable English teaching speech board according to claim 1, characterized in that: A motor (11) is mounted on the top end of the screw rod A (4), and universal wheels are mounted around the bottom end of the base (1).

4. A portable English teaching speech board according to claim 1, characterized in that: A spring A (1004) is installed inside the box (1001), one end of the spring A (1004) is fixedly connected to one side of the counterweight (1003), and the other end of the spring A (1004) is fixedly connected to the inner wall of the box (1001).

5. A portable English teaching speech board according to claim 1, characterized in that: The driving assembly comprises a liquid storage tube (1005) welded to one side of a slider (5), a piston (1006) slidingly arranged inside the liquid storage tube (1005), a liquid infusion tube (1007) being connected to the top end of the liquid storage tube (1005), one end of the liquid infusion tube (1007) being connected to the air bag (1002), a collar (1008) being sleeved on the outer wall of the liquid storage tube (1005), and a plurality of groups of magnets (1009) being installed on the inner wall of the collar (1008).

6. A portable English teaching speech board according to claim 5, characterized in that: The piston (1006) is made of ferrite material, and a sealing ring is sleeved on the outer wall of the piston (1006). The piston (1006) is magnetically connected to the magnet (1009).

7. The portable English teaching speech board according to claim 1, characterized in that: The pneumatic assembly comprises a sleeve (1013) mounted on one side of a lifting column (1011); an adjusting rod (1014) is slidably disposed inside the sleeve (1013); the top end of the adjusting rod (1014) is hinged to the bottom end of a rotating plate (1012); the bottom end of the sleeve (1013) is connected to an air supply pipe (1015); one end of the air supply pipe (1015) is connected to the inside of a box body (1001); one end of the rotating plate (1012) is fixedly connected to the back side of a plate body (6); and a spring B (1017) is disposed inside the sleeve (1013).

8. The portable English teaching speech board according to claim 1, characterized in that: An L-shaped slide plate (1016) is slidably disposed inside the box body (1001), and a movable wheel is disposed at the bottom end of the L-shaped slide plate (1016).

9. The portable English teaching speech board according to claim 1, characterized in that: The outer walls of the screw rod A (4) and the screw rod B (904) are both sleeved with mutually meshing bevel gears (907).

10. The portable English teaching speech board according to claim 1, characterized in that: The outer wall of the screw rod B (904) is sleeved with two groups of symmetrically arranged limit plates, and a limit rod (906) is fixedly connected between the two groups of limit plates. The moving rod (905) slides on the outer wall of the limit rod (906).

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