CN213339271U - Dedicated teaching demonstration board of english tense - Google Patents

Abstract

The utility model relates to a teaching demonstration board technical field just discloses a dedicated teaching demonstration board of english tense, comprising a base plate, the equal fixedly connected with drum in bottom plate upper surface four corners, the drum upper surface is pegged graft and is had the round bar, fixed surface is connected with the loading board on the round bar, the equal fixedly connected with universal wheel in bottom plate lower surface four corners. This dedicated teaching demonstration board of english tense, through setting up the third circle axle, the ratchet, transmission shaft and reset spring, the vice board that makes the left and right sides can make things convenient for stable drives the convex slider of the left and right sides respectively inwards move or outside motion along the orbit of spill spout, and can also comparatively effectually fix the connecting rod and the third circle axle that are located the rear side after the vice board stretches out, it is more stable after perhaps accomodating to make the vice board stretch out, comparatively effectual teaching content of having avoided can not all show, consequently, influence the problem of the quality of teaching.

Description

Dedicated teaching demonstration board of english tense

Technical Field

The utility model relates to a teaching demonstration board technical field specifically is a dedicated teaching demonstration board of english tense.

Background

English is the main international universal language in the world at present, and is also taken as one of the most important information carriers, so English learning has been more and more taken attention by people, as is well known, English tenses are the most important in English teaching no matter high school English or college English, especially college, on the basis of English tenses learned in high school, college English needs to learn English tenses further, and English teachers teach students through demonstration boards; the demonstration board of prior art is mostly single plate body, is not convenient for adjust the size of clipboard, when the teaching content is more, needs to clean the content in the past, and then leads to teaching content can not all show, consequently influences the quality of teaching.

For example, chinese patent publication No. CN211181284U discloses a teaching demonstration board dedicated for english tenses, which realizes a teaching demonstration board dedicated for english tenses through the mutual cooperation between a placement mechanism, an adjustment mechanism and a demonstration mechanism, and facilitates adjusting the size of the writing board, so that the writing board can be correspondingly adjusted according to teaching requirements, a slide bar is fixed by setting a fixing bolt, and the outer board is fixed after sliding out, so that the completeness of writing can be ensured, and when a large writing board is not needed, the writing board can be very conveniently stored; the inner plate and the outer plate are supported through the base and the supporting columns in actual use, the structure is simple, the height of the inner plate and the height of the outer plate cannot be adjusted conveniently, and the practicability of the whole device is reduced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a dedicated teaching demonstration board of english tense has solved the problem of proposing in the above-mentioned background art.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a special teaching demonstration board for English tenses comprises a bottom board, wherein four corners of the upper surface of the bottom board are fixedly connected with cylinders, round rods are inserted into the upper surfaces of the cylinders, bearing boards are fixedly connected to the upper surfaces of the round rods, universal wheels are fixedly connected to four corners of the lower surface of the bottom board, first supporting blocks are fixedly connected to the left side and the right side of the upper surface of the bottom board, first rotating shafts are inserted into the inner side surfaces of the first supporting blocks, transmission worms are sleeved on the left side and the right side of the outer surface of the first rotating shaft, second supporting blocks are fixedly connected to the front side and the rear side of the upper surface of the bottom board, second rotating shafts are inserted into the inner side surfaces of the second supporting blocks, transmission worm wheels are sleeved on the outer surface of the second rotating shafts, first transmission rods are sleeved on the front side and the rear side of the outer surface of the second rotating shafts, first round shafts are, the front side and the rear side of the lower surface of the bearing plate are fixedly connected with third supporting blocks, a second round shaft is inserted into the inner side of each third supporting block, the inner side of the inner side surface of each second transmission rod is inserted into the outer surface of the second round shaft, a concave chute is formed in the upper surface of the bearing plate, convex sliders are arranged on the left side and the right side inside the concave chute, a main plate is fixedly connected to the front side of the upper surface of the bearing plate, an auxiliary plate is fixedly connected to the upper surface of each convex slider, a control handle is fixedly connected to the back surface of the auxiliary plate on the right side, a third round shaft is fixedly connected to the back surface of the main plate, a connecting rod is sleeved on the outer surface of the third round shaft, a ratchet wheel is sleeved on the outer surface of the third round shaft, supporting shafts are fixedly connected to the upper side and the, the connecting block medial surface fixedly connected with reset spring, reset spring inner and fixture block surface fixed connection, connecting rod back bottom and top all peg graft and have the transmission shaft, first pivot right flank fixedly connected with carousel.

Preferably, the transmission worm is meshed with the transmission worm wheel, and the transmission worm wheel on the left side are opposite to the transmission worm and the transmission worm wheel on the right side in outer surface texture.

Preferably, the inner side of the back of the auxiliary plate is provided with a circular sliding groove matched with the transmission shaft, the width of the circular sliding groove is twenty-two millimeters, and the inner diameter of the transmission shaft is twenty-one millimeter.

Preferably, the outer surface of the control handle is sleeved with a circular rubber non-slip mat, and well-shaped non-slip grains are uniformly arranged on the outer surface of the circular rubber non-slip mat.

Preferably, the number of the ratchet wheels is two, the ratchet wheels are made of stainless steel, and the outer surface lines of the ratchet wheels on the front side and the outer surface lines of the ratchet wheels on the rear side are opposite.

Preferably, the inner wall of the concave sliding groove is provided with a ball, and a structure formed by the concave sliding groove and the ball is matched with the convex sliding block.

(III) advantageous effects

Compared with the prior art, the utility model provides a dedicated teaching demonstration board of english tense possesses following beneficial effect:

1. this dedicated teaching demonstration board of english tense, through setting up the third circle axle, the ratchet, transmission shaft and reset spring, the vice board that makes the left and right sides can make things convenient for stable drives the convex slider of the left and right sides respectively inwards move or outside motion along the orbit of spill spout, and can also comparatively effectually fix the connecting rod and the third circle axle that are located the rear side after the vice board stretches out, it is more stable after perhaps accomodating to make the vice board stretch out, comparatively effectual teaching content of having avoided can not all show, consequently, influence the problem of the quality of teaching.

2. This dedicated teaching demonstration board of english tense, through setting up the carousel, the transmission worm, second pivot and second circle axle, the first circle axle that makes the left and right sides can stabilize effectual drive the left and right sides respectively rotates along opposite direction, thereby can be comparatively stable the whole vertical height of the first transfer line of regulation and second transfer line, and then can be convenient highly adjust the loading board, thereby can be convenient highly adjust mainboard and subplate, the practicality of mainboard and subplate has been improved greatly.

Drawings

Fig. 1 and 2 are schematic structural views of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

fig. 4 is a schematic view of the lifting structure of the present invention.

In the figure: 1. a base plate; 2. a cylinder; 3. a round bar; 4. a carrier plate; 5. a universal wheel; 6. a first support block; 7. a first rotating shaft; 8. a drive worm; 9. a second support block; 10. a second rotating shaft; 11. a drive worm gear; 12. a first drive lever; 13. a first circular shaft; 14. a second transmission rod; 15. a third support block; 16. a second circular shaft; 17. a concave chute; 18. a male slider; 19. a main board; 20. a sub-board; 21. a control handle; 22. a third circular shaft; 23. a connecting rod; 24. a ratchet wheel; 25. a support shaft; 26. a clamping block; 27. a pressure lever; 28. connecting blocks; 29. a return spring; 30. a drive shaft; 31. a turntable.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a teaching demonstration board special for English tenses comprises a bottom board 1, cylinders 2 are fixedly connected to four corners of the upper surface of the bottom board 1, round rods 3 are inserted into the upper surfaces of the cylinders 2, bearing plates 4 are fixedly connected to the upper surfaces of the round rods 3, universal wheels 5 are fixedly connected to four corners of the lower surface of the bottom board 1, first supporting blocks 6 are fixedly connected to the left and right sides of the upper surface of the bottom board 1, first rotating shafts 7 are inserted into the inner side surfaces of the first supporting blocks 6, transmission worms 8 are sleeved on the left and right sides of the outer surfaces of the first rotating shafts 7, second supporting blocks 9 are fixedly connected to the front and rear sides of the upper surface of the bottom board 1, second rotating shafts 10 are inserted into the inner side surfaces of the second supporting blocks 9, transmission worm wheels 11 are sleeved on the outer surfaces of the second rotating shafts 10, first transmission rods 12 are sleeved on the front and rear sides of the outer surfaces of the second rotating shafts 10, first round shafts 13 are, the front side and the rear side of the lower surface of the bearing plate 4 are fixedly connected with third supporting blocks 15, the inner side of each third supporting block 15 is inserted with a second round shaft 16, the inner side of a second transmission rod 14 is inserted with the outer surface of the second round shaft 16, the upper surface of the bearing plate 4 is provided with a concave sliding chute 17, the left side and the right side of the inner part of the concave sliding chute 17 are respectively provided with a convex sliding block 18, the front side of the upper surface of the bearing plate 4 is fixedly connected with a main plate 19, the upper surface of each convex sliding block 18 is fixedly connected with an auxiliary plate 20, the back surface of the auxiliary plate 20 positioned on the right side is fixedly connected with an operating handle 21, the back surface of the main plate 19 is fixedly connected with a third round shaft 22, the outer surface of the third round shaft 22 is sleeved with a connecting rod 23, the outer, the back of the connecting rod 23 positioned at the rear side is fixedly connected with a connecting block 28, the inner side surface of the connecting block 28 is fixedly connected with a return spring 29, the inner end of the return spring 29 is fixedly connected with the outer surface of a clamping block 26, the bottom and the top of the back of the connecting rod 23 are respectively inserted with a transmission shaft 30, the left and right side subplates 20 can conveniently and stably drive the left and right side convex sliders 18 to move inwards or outwards along the track of the concave sliding groove 17 respectively by arranging a third circular shaft 22, a ratchet wheel 24, the transmission shaft 30 and the return spring 29, and the connecting rod 23 and the third circular shaft 22 positioned at the rear side can be effectively fixed after the subplates 20 are stretched, so that the subplates 20 are more stable after being stretched or being stored, the problem that teaching contents cannot be completely displayed is effectively avoided, and the quality of teaching is influenced, the right side surface of the first rotating shaft 7 is, through setting up carousel 31, drive worm 8, second pivot 10 and second circle axle 16, the first transmission pole 12 that makes the left and right sides can stabilize effectual first circle axle 13 that drives the left and right sides respectively and rotate along opposite direction, thereby can be comparatively stable adjust the whole vertical height of first transmission pole 12 and second transmission pole 14, and then can be convenient highly adjust loading board 4, thereby can be convenient highly adjust mainboard 19 and subplate 20, mainboard 19 and subplate 20's practicality has been improved greatly.

The utility model discloses in, for the messenger be located that left second pivot 10 can be stable rotate along opposite direction, consequently set up transmission worm 8 and the meshing of transmission worm wheel 11, be located left transmission worm 8 and transmission worm wheel 11 and be located the transmission worm 8 and the 11 surface lines on transmission worm wheel on right side opposite, the line has improved the second pivot 10 of the left and right sides along opposite direction pivoted stability on the contrary.

The utility model discloses in, the subplate 20 that is located the right side in order to make the drive that the subplate 20 that is located the right side can be convenient moves, consequently sets up the circular spout with transmission shaft 30 looks adaptation in the subplate 20 back inboard, and the width of circular spout is twenty two millimeters, and the internal diameter of transmission shaft 30 is twenty one millimeters, and circular spout and transmission shaft 30 have improved the flexibility of the subplate 20 linkage of the left and right sides.

The utility model discloses in, for more stable controlling handle 21, consequently the ring shape rubber slipmat has been cup jointed at control handle 21 surface, and ring shape rubber slipmat surface evenly is provided with well shape anti-skidding line, and well shape anti-skidding line has increased the palm and has controlled the frictional force between the handle 21, has improved the stability of controlling handle 21.

The utility model discloses in, carry on spacingly to the connecting rod 23 that is located the rear side in order to make ratchet 24 more firm, consequently set up ratchet 24's quantity and be two sets of, and ratchet 24's material is the stainless steel, and the ratchet 24 that is located the front side is opposite with the ratchet 24 surface line that is located the rear side, and the ratchet 24 surface line of front and back both sides has improved the stability fixed to ratchet 24 on the contrary.

The utility model discloses in, in order to make the drive subplate 20 motion that convex slider 18 can be smooth and easy, consequently be provided with the ball at concave chute 17 inner wall, and concave chute 17 and the structure and the 18 looks adaptations of convex slider that the ball formed, the ball has reduced the frictional force between convex slider 18 and the concave chute 17, has improved the smoothness nature of 18 movements of convex slider.

When the device is used, firstly, the rotating disc 31 is rotated clockwise, the rotating disc 31 drives the first rotating shaft 7 and the transmission worm 8 to rotate clockwise, the transmission worm 8 is meshed with the transmission worm wheel 11, the transmission worm 8 and the transmission worm wheel 11 on the left side have opposite lines with the outer surfaces of the transmission worm 8 and the transmission worm wheel 11 on the right side, the transmission worm wheel 11 on the left side drives the first transmission rod 12 and the first circular shaft 13 on the left side to rotate anticlockwise, the transmission worm wheel 11 on the right side drives the first transmission rod 12 and the first circular shaft 13 on the right side to rotate clockwise, the inner side of the second transmission rod 14 is inserted into the outer surface of the second circular shaft 16, so that the overall vertical height of the first transmission rod 12 and the second transmission rod 14 is increased, the second circular shaft 16 drives the third supporting block 15 and the bearing plate 4 to move upwards, the bearing plate 4 drives the circular rod 3 to move, when the lower surface of the bearing plate 4 is one hundred twenty centimeters away from the upper surface of the bottom plate 1, the rotating disc 31 stops rotating, then the pressing rod 27 at the bottom is held, the pressing rod 27 at the bottom drives the fixture block 26 at the bottom to rotate anticlockwise by taking the circle center of the supporting shaft 25 at the bottom as a center, so that the fixture block 26 at the bottom is separated from the ratchet wheel 24 at the rear side, meanwhile, the control handle 21 is held, the control handle 21 drives the auxiliary plate 20 and the convex slide block 18 at the right side to move rightwards along the track of the concave sliding groove 17, the inner side of the back surface of the auxiliary plate 20 is provided with a circular sliding groove matched with the transmission shaft 30, so that the transmission shaft 30 at the top and the transmission shaft 30 at the bottom move inwards, the longitudinal included angle between the connecting rods 23 at the front side and the rear side is enlarged, and, when the longitudinal included angle between the front and rear connecting rods 23 is one hundred and fifty degrees, the pressing rod 27 at the bottom is released, and the fixture block 26 at the bottom is matched with the ratchet wheel 24 at the rear side under the elastic action of the return spring 29, so that the connecting rod 23 at the rear side is fixed.

To sum up, this dedicated teaching demonstration board of english tense, through setting up third circle axle 22, ratchet 24, transmission shaft 30 and reset spring 29, the vice board 20 that makes the left and right sides can make things convenient for stable the convex slider 18 that drives the left and right sides respectively along the orbit inward movement or the outward movement of spill spout 17, and can also be comparatively effectual fix connecting rod 23 and the third circle axle 22 that are located the rear side after vice board 20 stretches out, it is more stable after perhaps accomodating to make vice board 20 stretch out, comparatively effectual teaching content of having avoided can not all demonstrates, consequently, influence the problem of the quality of teaching.

This dedicated teaching demonstration board of english tense, through setting up carousel 31, drive worm 8, second pivot 10 and second circle axle 16, the first transfer line 12 that makes the left and right sides can stabilize effectual first circle axle 13 that drives the left and right sides respectively and rotate along opposite direction, thereby can be comparatively stable adjust the whole vertical height of first transfer line 12 and second transfer line 14, and then can be convenient highly adjust loading board 4, thereby can be convenient highly adjust mainboard 19 and subplate 20, mainboard 19 and subplate 20's practicality has been improved greatly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a dedicated teaching demonstration board of english tense, includes bottom plate (1), its characterized in that: the four corners of the upper surface of the bottom plate (1) are fixedly connected with cylinders (2), the upper surface of each cylinder (2) is spliced with a round rod (3), the upper surface of each round rod (3) is fixedly connected with a bearing plate (4), the four corners of the lower surface of the bottom plate (1) are fixedly connected with universal wheels (5), the left side and the right side of the upper surface of the bottom plate (1) are fixedly connected with first supporting blocks (6), the inner side of each first supporting block (6) is spliced with a first rotating shaft (7), the left side and the right side of the outer surface of each first rotating shaft (7) are respectively sleeved with a transmission worm (8), the front side and the rear side of the upper surface of the bottom plate (1) are respectively fixedly connected with second supporting blocks (9), the inner side of each second supporting block (9) is spliced with a second rotating shaft (10), the outer surface of each second rotating shaft (10) is sleeved with a transmission worm wheel (11), a first round shaft (13) is inserted and connected to the outer side of the inner side face of the first transmission rod (12), a second transmission rod (14) is sleeved on the outer surface of the first round shaft (13), third supporting blocks (15) are fixedly connected to the front side and the rear side of the lower surface of the bearing plate (4), a second round shaft (16) is inserted and connected to the inner side of the third supporting block (15), the inner side of the inner side face of the second transmission rod (14) is inserted and connected to the outer surface of the second round shaft (16), a concave sliding groove (17) is formed in the upper surface of the bearing plate (4), convex sliding blocks (18) are arranged on the left side and the right side of the inner part of the concave sliding groove (17), a main plate (19) is fixedly connected to the front side of the upper surface of the bearing plate (4), an auxiliary plate (20) is fixedly connected to the upper surface of the convex sliding blocks (18), a control handle (, connecting rod (23) have been cup jointed to third circle axle (22) surface, ratchet (24) have been cup jointed to third circle axle (22) surface, equal fixedly connected with back shaft (25) in both sides about connecting rod (23) the back that is located the rear side, fixture block (26) have been cup jointed to back shaft (25) surface, fixture block (26) surface fixed connection has depression bar (27), and connecting rod (23) the back fixedly connected with connecting block (28) that is located the rear side, connecting block (28) medial surface fixedly connected with reset spring (29), reset spring (29) inner and fixture block (26) surface fixed connection, connecting rod (23) back bottom and top all are pegged graft and are had transmission shaft (30), first pivot (7) right flank fixedly connected with carousel (31).

2. The English tense dedicated teaching demonstration board according to claim 1, characterized in that: the transmission worm (8) is meshed with the transmission worm wheel (11), and the transmission worm (8) and the transmission worm wheel (11) on the left side are opposite to the transmission worm (8) and the transmission worm wheel (11) on the right side in outer surface lines.

3. The English tense dedicated teaching demonstration board according to claim 1, characterized in that: the inner side of the back of the auxiliary plate (20) is provided with a circular sliding groove matched with the transmission shaft (30), the width of the circular sliding groove is twenty-two millimeters, and the inner diameter of the transmission shaft (30) is twenty-one millimeter.

4. The English tense dedicated teaching demonstration board according to claim 1, characterized in that: the outer surface of the control handle (21) is sleeved with a circular rubber non-slip mat, and well-shaped non-slip grains are uniformly arranged on the outer surface of the circular rubber non-slip mat.

5. The English tense dedicated teaching demonstration board according to claim 1, characterized in that: the number of ratchet wheels (24) is two, and the material of ratchet wheels (24) is stainless steel, and the ratchet wheels (24) that are located the front side are opposite with the ratchet wheels (24) that are located the rear side surface line.

6. The English tense dedicated teaching demonstration board according to claim 1, characterized in that: the inner wall of the concave sliding groove (17) is provided with a ball, and the structure formed by the concave sliding groove (17) and the ball is matched with the convex sliding block (18).

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