CN114393946B

CN114393946B - Dust-free writing equipment for environment-friendly teaching

Info

Publication number: CN114393946B
Application number: CN202210105967.0A
Authority: CN
Inventors: 顾城天; 肖雪琳; 赵荻; 秦欢; 史勤刚; 黄柯毓; 邱晓莹; 张明; 薛挺
Original assignee: Chengdu College of University of Electronic Science and Technology of China
Current assignee: Chengdu College of University of Electronic Science and Technology of China
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2023-07-11
Anticipated expiration: 2042-01-28
Also published as: CN114393946A

Abstract

The invention relates to the technical field of teaching equipment, in particular to dust-free writing equipment for environment-friendly teaching. According to the invention, the spring can gradually drive the winding column to wind the dust-free soft leather, so that the tension can be applied to the U-shaped plates at two sides, and the supporting rod can be driven to gradually shrink into the rotating column, so that the dust-free soft leather at two sides can be wound into the mounting column again, the whole writing equipment can be conveniently stored, the dust-free soft leather can be conveniently carried, the dust-free soft leather can be unfolded to carry out dust-free writing when needed, teaching and the like can be conveniently carried out outdoors by teachers, and the dust-free soft leather at two sides can be stretched to the length twice as long as the rotating column, so that the writing equipment has enough area to carry out writing and the like, the dust-free soft leather can be rapidly rewound through matching with the winding column, and the surface of the dust-free soft leather can be rapidly cleaned in the rewinding process.

Description

Dust-free writing equipment for environment-friendly teaching

Technical Field

The invention relates to the technical field of teaching equipment, in particular to dust-free writing equipment for environment-friendly teaching.

Background

For a long time, people make a blackboard from materials such as a wood board, a glass board, a stone board and the like, write on the blackboard with chalk, and provide necessary conditions for people to learn, but the blackboard device has the following great disadvantages: firstly, the friction resistance is high, and writing is laborious; secondly, dust pollution is serious during wiping, so that hands and clothes are dirty, and the human health is also endangered; thirdly, handwriting on the blackboard is not easy to clean; fourthly, the consumption of chalk and blackboard brush is large. The blackboard of usefulness of writing at present is difficult to accomodate the transport to be inconvenient for remove outdoor teaching use, when wiping the blackboard through the blackboard eraser, produce chalk dust and probably inhale lung by student or mr, thereby be difficult for mr and student's health, and the chalk dust can diffuse in the air, can cause the influence to school or outdoor environmental protection like this, and make the clean efficiency to writing equipment lower through the mode of manual wiping, consume the manpower.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide dust-free writing equipment for environmental protection teaching, which is characterized in that a mounting column is arranged in the dust-free writing equipment for environmental protection teaching, a winding column winding dust-free soft leather is rotatably arranged in the mounting column, a spring is fixedly arranged between the top end of the winding column and the mounting column, a bidirectional screw rod is arranged on one side of the winding column, two lifting seats on the screw rod can be driven to move on two sides by the rotation of the bidirectional screw rod, so that the rotating columns at two ends of the lifting seats can be driven to rotate, one end of a supporting rod sleeved in the rotating column and a U-shaped plate rotate, the two ends of the dust-free soft leather can be gradually opened by the U-shaped plate, one side of each lifting seat is provided with a winding rope wheel I which is in sliding connection with a sliding groove on the bidirectional screw rod, therefore, the first winding rope wheel can be driven to rotate when the bidirectional screw rod rotates, the first winding rope wheel can wind the connecting rope, as the two ends of the connecting rope are connected with one end of the supporting rod, the supporting rods at the two sides can slide in the rotating column through the connecting rope, so that the spreading area of dust-free soft leather can be increased, the dust-free soft leather at the two sides can be spread to the width twice of the rotating column until the rotating column is in parallel when the limiting blocks on the outer wall of the rotating column and the mounting column are in contact, the dust-free soft leather can be spread to the largest area, thereby being convenient for teachers to board books, and when the bidirectional screw rod reversely rotates, the spring can be driven to rotate towards the center of the screw rod through the two lifting seats, and as the first winding rope wheel gradually releases the connecting rope, the spring can gradually drive the winding column to wind the dust-free soft leather, thereby applying tension to the U-shaped boards at the two sides, the supporting rod can be driven to gradually shrink into the rotating column, so that dust-free soft leather on two sides can be rewound into the mounting column, the whole writing equipment can be conveniently stored, the dust-free equipment can be conveniently carried, the dust-free soft leather can be unfolded for dust-free writing when needed, teachers can conveniently conduct teaching and the like outdoors, and the dust-free soft leather on two sides can be unfolded for the length twice as long as the rotating column, so that the writing equipment has enough area for writing on blackboard and the like; the winding wheel II is arranged at the bottom end of the mounting column, the winding rope II is wound with the pulling rope, the pulling rope on the winding wheel II can be gradually pulled to the outside of the protective shell through the pull ring, so that the winding rope II can be driven to rotate, the rotating shaft can drive the gear III to rotate, the winding column and the bidirectional screw rod are respectively driven to rotate together through the meshing transmission of the gear III and the gear I and the gear II, the winding column can wind up the spring when rotating, the bidirectional screw rod can drive the two lifting seats to move towards the two sides of the screw rod, thus being convenient for teachers and the like to use, when the pulling rope is elongated to a certain length, the pulling rope can be driven to slide in the sleeved column through the pulling rod, so that the pulling rope can be in contact and clamped connection through the limiting column, the pulling rope is prevented from shrinking, when the surface of the dust-free soft leather is wiped, the limit post is driven to shrink back through the poking rod, the spring can drive the winding post to shrink the dust-free soft leather rapidly, when the two sides of the dust-free soft leather shrink towards the center, the surface of the dust-free soft leather can be adhered and slid with the cleaning pad in the sliding hole, the surface of the dust-free soft leather can be cleaned rapidly through the cleaning pad, when the winding post rotates, the gear I at the bottom of the dust-free soft leather can drive the gear III and the gear II to rotate together, the rotation of the gear III can drive the winding rope wheel II to automatically wind the pulling rope, so that the next pulling is facilitated, the rotation of the gear II can drive the bidirectional screw rod to rotate reversely, the U-shaped plates at the two sides can be driven to shrink towards the center, the rotating post and the supporting rod at the two sides can be shrunk, so that the dust-free soft leather can be rewound rapidly by matching with the winding post, the surface of the dust-free soft leather can be cleaned in the rewinding process, so that the surface of the dust-free soft leather does not need to be manually wiped, the cleaning efficiency of dust-free equipment can be improved, and educational personnel can use the dust-free soft leather conveniently.

The aim of the invention can be achieved by the following technical scheme:

the utility model provides a dustless equipment of writing for environmental protection teaching, includes the erection column, the erection column is rotated and is connected with the book post, the last dustless cork that has cup jointed of book post, the fixed clockwork spring that is provided with in top of book post, the slide opening has all been seted up on the relative lateral wall of erection column, dustless cork and slide opening sliding connection, the equal fixedly connected with U template in both ends of dustless cork, the central line position department rotation in erection column bottom is connected with two-way lead screw, two about its vertical center face symmetry rotation on the two-way lead screw is connected with two elevating brackets, two the both ends of elevating bracket all rotate and are connected with the rotation post, the vaulting pole has been cup jointed in the rotation post in the slip, the one end and the U template rotate and be connected with about its vertical center face symmetry on the two-way lead screw two spouts have all been seted up on the one end of elevating bracket is rotated and is connected with reel one, reel one and spout slip joint, reel one is gone up and is connected with the connection rope.

The bottom of the mounting column is fixedly connected with a protective shell, the protective shell is rotationally connected with a rotating shaft, the top end of the rotating shaft is fixedly sleeved with a gear III, the bottom end of the winding column is fixedly sleeved with a gear I, the gear I is in meshed connection with the gear III, the bottom end of the bidirectional screw rod is fixedly sleeved with a gear II, the gear II is in meshed connection with the gear III, the gear II and the gear I are positioned at two ends of the gear III, the bottom end of the rotating shaft is fixedly sleeved with a winding rope wheel II, one end of the winding rope wheel II is in wound connection with a drawing rope fixedly connected with the winding rope wheel II, the pulling rope is in sliding connection with the protective shell, the pull ring is fixedly arranged at the other end of the pulling rope, one end of the pulling rope can be pulled to move towards the outside of the protective shell through the pull ring, so that the second winding rope wheel can be driven to rotate, the first gear and the second gear can be driven to rotate through the third gear at the second top of the winding rope wheel, when the spring drives the winding column to rotate reversely, the third gear and the second gear can be driven to rotate reversely through the first gear, and winding of the pulling rope and shrinkage of equipment are facilitated.

Further, the utility model discloses a connecting rope, including the connecting rope, the connecting rope is located the inside of bar shell, the one end of bar shell rotates and is provided with the pulley, connecting rope and pulley looks wiring, the central line position department fixedly connected with of bar shell lateral wall decides the rope post, connecting rope and deciding the rope post and sliding the sleeve joint, the central point department of connecting rope is fixed with the outer wall of reel one, through the fixed pulley that is provided with in the one end of bar shell to can be convenient for connect rope and pulley wiring slip, the rolling of connecting rope of being convenient for.

Further, the dust-free soft leather is made of a flexible material with a smooth surface, the surface of the dust-free soft leather can be written by a white board pen, the dust-free soft leather and the rolling column are sleeved, the middle line position of the dust-free soft leather is fixed with the outer wall of the rolling column, and a teacher can write, draw and the like on the dust-free soft leather by using the white board pen, so that teaching can be conveniently conducted.

Further, two slide hole positions all are provided with the cleaning pad that is connected with the erection column inner wall mutually, the side of cleaning pad is laminated with dustless soft skin and is slided mutually, is provided with cleaning pad and dustless soft skin surface through in slide hole department and laminates the slip mutually to when dustless soft skin is rewound, can clean dustless soft skin surface fast through the cleaning pad.

Further, four limiting blocks are symmetrically and fixedly connected to one side wall of the mounting column, which is close to the bidirectional screw rod, on the vertical center surface of the mounting column, the four limiting blocks are in contact with the rotating column, and limiting blocks are fixedly arranged on the surface of the mounting column, so that the rotation of the rotating column can be limited, and the rotating columns on two sides can be kept in a straight line state.

Further, characterized in that, the bottom fixedly connected with of protecting crust accepts the seat, it adjusts the seat to accept seat bottom central point department fixedly connected with, it is connected with the one end of three supporting legs post to adjust the annular equidistance rotation in the bottom of seat, and is three the other end of supporting legs post has all fixedly cup jointed anti-skidding cover, has cup jointed anti-skidding cover through the one end in the supporting legs post to can increase the frictional force of supporting legs post bottom, prevent that it from skidding.

Further, fixedly connected with cup joints the post on the lateral wall of protecting crust, cup joint post central point put the department and offered the round hole that cup joints with the pull rope mutually, fixedly connected with mount on the lateral wall of cup joints the post, mount central point put department sliding connection has the poking rod, the one end fixedly connected with of poking rod cup joints post gliding spacing post mutually, the one end of spacing post is inconsistent the joint with the pull rope, the other end fixedly connected with of spacing post is fixed with the extrusion spring of mount mutually, extrusion spring cup joints with poking rod mutually, can drag spacing post through poking rod and slide, and the spacing post of being convenient for can contradict the joint to the pull rope, and when accomodating equipment, need drag spacing post backward movement, the pull rope of being convenient for carries out automatic rolling.

The invention has the beneficial effects that:

1. the installation column is arranged in the dust-free writing equipment for environment-friendly teaching, the winding column winding dust-free soft leather is arranged in the installation column in a rotating way, the spring is fixedly arranged between the top end of the winding column and the installation column, the bidirectional screw rod is arranged on one side of the winding column, the two lifting seats on the screw rod are driven to move on the two sides by the rotation of the bidirectional screw rod, so that the rotating columns at the two ends of the lifting seats can be driven to rotate, one end of a supporting rod sleeved in the rotating column and the U-shaped plate rotate in the rotating process of the rotating column, the two ends of the dust-free soft leather can be gradually opened by the U-shaped plate, as the first winding rope wheels which are in sliding connection with the sliding grooves on the bidirectional screw rod are arranged on one sides of the two lifting seats, the first winding rope wheels can be driven to rotate while the bidirectional screw rod rotates, the connecting ropes can be wound by the first winding rope wheels, because both ends of the connecting rope are connected with one end of the supporting rod, the supporting rods at both sides can be pulled to slide in the rotating columns through the connecting rope, so that the spreading area of the dust-free soft leather can be increased, the dust-free soft leather at both sides can be spread to the width twice of the rotating columns, when the rotating columns are in parallel state until the rotating columns are in contact with the limiting blocks on the outer walls of the mounting columns, the dust-free soft leather can be spread to the maximum area, thereby being convenient for teachers to carry out blackboard writing, and when the bidirectional screw rod reversely rotates, the rotating columns can be driven to rotate towards the central position of the screw rod through the two lifting seats, and as the connecting rope is gradually released by the rope winding wheel, the spring can gradually drive the winding columns to wind the dust-free soft leather, so that the tension can be applied to U-shaped plates at both sides, and the supporting rods can be driven to gradually shrink into the rotating columns, the dust-free soft leather on the two sides can be rewound into the mounting column, so that the whole writing equipment can be conveniently stored, the dust-free equipment can be conveniently carried, the dust-free soft leather can be unfolded for dust-free writing when needed, teachers can conveniently conduct teaching and the like outdoors, and the dust-free soft leather on the two sides can be unfolded for the length twice as long as the rotating column, so that the writing equipment has enough area for writing on blackboard and the like;

2. the winding wheel II is arranged at the bottom end of the mounting column, the winding rope II is wound with the pulling rope, the pulling rope on the winding wheel II can be gradually pulled to the outside of the protective shell through the pull ring, so that the winding rope II can be driven to rotate, the rotating shaft can drive the gear III to rotate, the winding column and the bidirectional screw rod are respectively driven to rotate together through the meshing transmission of the gear III and the gear I and the gear II, the winding column can wind up the spring when rotating, the bidirectional screw rod can drive the two lifting seats to move towards the two sides of the screw rod, thus being convenient for teachers and the like to use, when the pulling rope is elongated to a certain length, the pulling rope can be driven to slide in the sleeved column through the pulling rod, so that the pulling rope can be in contact and clamped connection through the limiting column, the pulling rope is prevented from shrinking, when the surface of the dust-free soft leather is wiped, the limit post is driven to shrink back through the poking rod, the spring can drive the winding post to shrink the dust-free soft leather rapidly, when the two sides of the dust-free soft leather shrink towards the center, the surface of the dust-free soft leather can be adhered and slid with the cleaning pad in the sliding hole, the surface of the dust-free soft leather can be cleaned rapidly through the cleaning pad, when the winding post rotates, the gear I at the bottom of the dust-free soft leather can drive the gear III and the gear II to rotate together, the rotation of the gear III can drive the winding rope wheel II to automatically wind the pulling rope, so that the next pulling is facilitated, the rotation of the gear II can drive the bidirectional screw rod to rotate reversely, the U-shaped plates at the two sides can be driven to shrink towards the center, the rotating post and the supporting rod at the two sides can be shrunk, so that the dust-free soft leather can be rewound rapidly by matching with the winding post, the surface of the dust-free soft leather can be cleaned in the rewinding process, so that the surface of the dust-free soft leather does not need to be manually wiped, the cleaning efficiency of dust-free equipment can be improved, and educational personnel can use the dust-free soft leather conveniently.

Drawings

The invention is further described below with reference to the accompanying drawings.

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

FIG. 2 is a schematic top view of the overall structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the mounting post of the present invention;

FIG. 4 is a schematic view of the overall distracted state structure of the present invention;

FIG. 5 is a schematic view of the bottom structure of the mounting post of the present invention;

FIG. 6 is a schematic diagram of a connection structure of a protective shell according to the present invention;

FIG. 7 is a schematic view of a bi-directional screw structure in accordance with the present invention;

FIG. 8 is a schematic view of the structure of FIG. 7 at A;

FIG. 9 is a schematic view of a rotating column according to the present invention;

FIG. 10 is a schematic view of the structure at B in FIG. 9;

fig. 11 is a schematic view of the structure of the support leg according to the present invention.

In the figure: 101. a mounting column; 102. a rolling column; 103. a clockwork spring; 104. a first gear; 105. a two-way screw rod; 106. a chute; 107. a lifting seat; 108. a rope coiling wheel I; 109. a second gear; 110. a rotating shaft; 111. a third gear; 112. a rope winding wheel II; 113. pulling a rope; 114. a slide hole; 115. a cleaning pad; 116. a limiting block; 117. a protective shell; 118. sleeving a column; 119. a round hole; 120. a fixing frame; 121. a toggle rod; 122. a limit column; 123. extruding a spring; 201. rotating the column; 202. a brace rod; 203. a bar-shaped shell; 204. a connecting rope; 205. rope fixing column; 206. a pulley; 207. a U-shaped plate; 300. dust-free soft skin; 401. a socket; 402. an adjusting seat; 403. supporting leg columns; 404. an anti-skid sleeve.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-11, a dust-free writing device for environmental protection teaching includes a mounting column 101, a winding column 102 is rotatably connected in the mounting column 101, a dust-free soft leather 300 is sleeved on the winding column 102, a spring 103 is fixedly arranged at the top end of the winding column 102, sliding holes 114 are formed on opposite side walls of the mounting column 101, the dust-free soft leather 300 is slidably connected with the sliding holes 114, two ends of the dust-free soft leather 300 are fixedly connected with a U-shaped plate 207, a bidirectional screw 105 is rotatably connected at a center line position of the bottom of the mounting column 101, two lifting seats 107 are symmetrically rotatably connected on the bidirectional screw 105 around a vertical center plane thereof, a rotating column 201 is rotatably connected at two ends of the two lifting seats 107, a supporting rod 202 is slidably sleeved in the rotating column 201, one end of the supporting rod 202 is rotatably connected with the U-shaped plate 207, two sliding grooves 106 are symmetrically formed on the bidirectional screw 105 around the vertical center plane, one ends of the two lifting seats 107 are rotatably connected with a first rope winding wheel 108, the first rope wheel 108 is slidably clamped with the sliding grooves 106, a connecting rope 204 is connected with the first rope wheel 108, and two ends of the connecting rope 204 are fixedly connected with one ends of the supporting rod.

The bottom of the installation post 101 is fixedly connected with a protective shell 117, the protective shell 117 is rotationally connected with a rotating shaft 110, the top end of the rotating shaft 110 is fixedly sleeved with a gear III 111, the bottom end of the winding post 102 is fixedly sleeved with a gear I104, the gear I104 is in meshed connection with the gear III 111, the bottom end of the bidirectional screw rod 105 is fixedly sleeved with a gear II 109, the gear II 109 is in meshed connection with the gear III 111, the gear II 109 and the gear I104 are positioned at two ends of the gear III 111, the bottom end of the rotating shaft 110 is fixedly sleeved with a winding rope wheel II 112, one end of the winding rope wheel II 112 is wound with a pulling rope 113 fixedly connected with the winding rope II, the pulling rope 113 is in sliding connection with the protective shell 117, the other end of the pulling rope 113 is fixedly provided with a pull ring, one end of the pulling rope 113 can be pulled to move towards the outside of the protective shell 117 through the pull ring, and accordingly the winding rope wheel II 112 can be driven to rotate, the gear III 111 and the gear II 109 can be driven to rotate through the gear III 111 at the top of the winding rope wheel II 112, when the winding rope 103 drives the winding post 102 to rotate reversely, the gear III 111 and the gear II 109 can be driven to rotate reversely through the gear I104, and the winding rope 113 can be driven to rotate reversely, so that the pulling rope 113 can be conveniently contracted and contracted.

The center line position of the outer wall of the rotating column 201 is fixedly connected with the strip-shaped shell 203, the connecting rope 204 is positioned inside the strip-shaped shell 203, one end of the strip-shaped shell 203 is rotatably provided with the pulley 206, the connecting rope 204 is in wire connection with the pulley 206, the center line position of the outer side wall of the strip-shaped shell 203 is fixedly connected with the rope fixing column 205, the connecting rope 204 is in sliding sleeve connection with the rope fixing column 205, the center position of the connecting rope 204 is fixedly connected with the outer wall of the rope winding wheel 108, and the pulley 206 is fixedly arranged at one end of the strip-shaped shell 203, so that the connecting rope 204 and the pulley 206 can be conveniently connected in wire connection and sliding, and winding of the connecting rope 204 is facilitated.

The dust-free soft leather 300 is made of a flexible material with a smooth surface, the surface of the dust-free soft leather 300 can be written by a white board pen, the dust-free soft leather 300 and the rolling column 102 are rolled and sleeved, the middle line position of the dust-free soft leather 300 is fixed with the outer wall of the rolling column 102, and a teacher can write and draw on the dust-free soft leather 300 by using the white board pen, so that teaching can be conveniently performed.

The cleaning pads 115 fixedly connected with the inner wall of the mounting column 101 are arranged at the positions of the two sliding holes 114, the side surfaces of the cleaning pads 115 are attached to the dust-free soft leather 300 and slide, and the cleaning pads 115 and the surfaces of the dust-free soft leather 300 are attached to each other and slide through the positions of the sliding holes 114, so that when the dust-free soft leather 300 is rewound, the surfaces of the dust-free soft leather 300 can be quickly cleaned through the cleaning pads 115; four limiting blocks 116 are symmetrically and fixedly connected to one side wall of the mounting column 101, which is close to the bidirectional screw rod 105, on the vertical center surface of the mounting column, the four limiting blocks 116 are in contact with the rotating column 201, and the limiting blocks 116 are fixedly arranged on the surface of the mounting column 101, so that the rotation of the rotating column 201 can be limited, and the rotating columns 201 on two sides can be kept in a straight line state.

The bottom of the protective shell 117 is fixedly connected with a bearing seat 401, the center position of the bottom of the bearing seat 401 is fixedly connected with an adjusting seat 402, the bottom of the adjusting seat 402 is annularly and equidistantly connected with one ends of three supporting leg columns 403 in a rotating mode, the other ends of the three supporting leg columns 403 are fixedly sleeved with anti-slip sleeves 404, and the anti-slip sleeves 404 are sleeved with one ends of the Zhi Chengjiao columns 403, so that the friction force of the bottom ends of the supporting leg columns 403 can be increased, and slipping of the supporting leg columns 403 is prevented; fixedly connected with cup joints post 118 on the lateral wall of protecting crust 117, cup joint post 118 central point put and set up the round hole 119 that cup joints with pull rope 113 mutually, fixedly connected with mount 120 on cup joints post 118's the lateral wall, mount 120 central point put the sliding connection of department and have toggle lever 121, toggle lever 121's one end fixedly connected with cup joints post 118 gliding spacing post 122 mutually, spacing post 122's one end and pull rope 113 butt joint, spacing post 122's the other end fixedly connected with and the extrusion spring 123 of mount 120 mutually fixed, extrusion spring 123 cup joints with toggle lever 121 mutually, can drag spacing post 122 through toggle lever 121 and slide, be convenient for spacing post 122 can carry out conflict joint to pull rope 113, and when accomodating equipment, need drag spacing post 122 and rebound, be convenient for pull rope 113 and carry out automatic rolling.

Working principle: when in use, the three supporting leg posts 403 can fall on the ground by pulling the three supporting leg posts 403, so that the supporting and positioning of the dustless writing equipment can be completed, when teaching is needed, the pulling rope 113 can be pulled by the pull ring, the pulling rope 113 can be pulled to the outside of the protective shell 117, the second winding rope wheel 112 is driven to rotate in the pulling process, the rotating shaft 110 can be driven to rotate, the third gear 111 at the top end can be driven by the rotating shaft 110 to rotate, the first gear 104 and the second gear 109 at two sides can be meshed and transmitted by the third gear 111, the winding post 102 can be driven by the first gear 104 to rotate, the spring 103 can be stressed, the second gear 109 can drive the bidirectional screw rod 105 at the top end to rotate, the two lifting seats 107 on the outer wall of the bidirectional screw rod 105 can be driven by the bidirectional screw rod 105 to move to two sides in the process, the lifting seat 107 can drive the rotating posts 201 at two ends to rotate, so that the U-shaped plates 207 at two ends of the equipment can be gradually driven to move to two sides, so that two ends of the dust-free soft leather 300 can be gradually driven to be pulled out of the sliding holes 114 at two sides of the mounting post 101, when the bidirectional screw rod 105 rotates, the first rope winding wheel 108 on the lifting seat 107 can be driven to rotate, the connecting rope 204 can be wound up through the first rope winding wheel 108, as two ends of the connecting rope 204 are connected with one ends of the supporting rods 202, when the connecting rope 204 contracts towards the center, the supporting rods 202 at two sides can be pulled to slide out of the rotating posts 201, the supporting rods 202 can push the U-shaped plates 207 at two sides to move, so that the expansion area of the dust-free soft leather 300 can be increased, the expansion width at two sides of the dust-free soft leather 300 is twice the length of the rotating posts 201, convenience is brought to a teacher to carry out board books or drawing, and the like, when the rotating posts 201 and the limiting blocks 116 are in contact, the pull rope 113 can be abutted and clamped through the limiting column 122, so that the pull rope is prevented from being recovered and contracted;

when the surface of the dust-free soft leather 300 is cleaned or stored in equipment, the limiting column 122 can be pulled out of the sleeving column 118 through the poking rod 121, the spring 103 can drive the winding column 102 to rotate, the winding column 102 can rewind the dust-free soft leather 300, the gear I104 at the bottom of the winding column 102 can drive the gear II 109 and then the gear III 111 to rotate, the bottom winding rope wheel II 112 can be driven to rotate when the gear III 111 rotates, the pulling rope 113 can be automatically wound through the winding rope wheel II 112, the next drawing is convenient, the bidirectional screw rod 105 can be driven to reversely rotate when the gear II 109 rotates, the two lifting seats 107 can be driven to reversely rotate towards the center of the screw rod, the lifting seats 107 can be driven to reversely rotate, the U-shaped plates 207 at two sides of the equipment can be driven to be wound towards the mounting column 101, the connecting rope 204 can be gradually released when the gear I104 rotates, the supporting rod 202 can gradually rotate downwards at the winding rod 207, the two sides of the winding rod 105 can be driven to gradually contract the dust-free soft leather 300, the dust-free soft leather 300 can be cleaned, and the dust-free soft leather 300 can not be quickly cleaned, and the dust-free soft leather 300 can be quickly cleaned, and the surface of the equipment can not be gradually contracted, and the dust-free soft leather 300 can be rapidly cleaned, and the surfaces can be quickly contracted, and the surfaces of the dust-free soft leather 300 can be cleaned, and the surfaces can be rapidly and the surfaces, and the surfaces can be cleaned, and the dust-free soft leather 300.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.

Claims

1. The dust-free writing equipment for environment-friendly teaching is characterized by comprising a mounting column (101), a winding column (102) is rotationally connected to the mounting column (101), dust-free soft leather (300) is sleeved on the winding column (102), a spring (103) is fixedly arranged at the top end of the winding column (102), sliding holes (114) are formed in opposite side walls of the mounting column (101), the dust-free soft leather (300) is in sliding connection with the sliding holes (114), U-shaped plates (207) are fixedly connected to two ends of the dust-free soft leather (300), a bidirectional screw rod (105) is rotationally connected to a center line position at the bottom of the mounting column (101), two lifting seats (107) are rotationally connected to the bidirectional screw rod (105) in a symmetrical mode about the vertical center plane of the bidirectional screw rod, two ends of each lifting seat (107) are rotationally connected with a rotating column (201), one end of each supporting rod (202) is rotationally connected with the U-shaped plates (207), two lifting wheels (108) are symmetrically clamped and connected to one end of each lifting wheel (108) by one lifting wheel (108), both ends of the connecting rope (204) are fixedly connected with one end of the stay bar (202);

the bottom of the mounting column (101) is fixedly connected with a protective shell (117), the protective shell (117) is rotationally connected with a rotating shaft (110), the top end of the rotating shaft (110) is fixedly sleeved with a gear III (111), the bottom end of the winding column (102) is fixedly sleeved with a gear I (104), the gear I (104) is meshed with the gear III (111), the bottom end of the bidirectional screw rod (105) is fixedly sleeved with a gear II (109), the gear II (109) is meshed with the gear III (111), the gear II (109) and the gear I (104) are positioned at two ends of the gear III (111), the bottom end of the rotating shaft (110) is fixedly sleeved with a winding rope wheel II (112), one end of the winding rope wheel II (112) is fixedly connected with a drawing rope (113) in a winding way, the drawing rope (113) is in sliding connection with the protective shell (117), and the other end of the drawing rope (113) is fixedly provided with a pull ring;

the utility model discloses a rope reel, including pivoted post (201), connecting rope (204), pulley (206) are provided with in the one end rotation of strip shell (203), connecting rope (204) and pulley (206) phase wiring, central line position department fixedly connected with of strip shell (201) lateral wall decides rope post (205), connecting rope (204) and deciding rope post (205) slip and cup joint, the central point department of connecting rope (204) is with the outer wall fixed connection of reel one (108).

2. A dust-free writing apparatus for environmental protection teaching according to claim 1, characterized in that the dust-free soft leather (300) is made of a flexible material with smooth surface, and the surface of the dust-free soft leather (300) is writable with a whiteboard marker.

3. The dust-free writing device for environmental protection teaching according to claim 1, wherein the two sliding holes (114) are respectively provided with a cleaning pad (115) fixedly connected with the inner wall of the mounting column (101), and the side surface of the cleaning pad (115) is attached to and slides on the dust-free soft leather (300).

4. The dustless writing device for environmental protection teaching according to claim 1, wherein four limiting blocks (116) are fixedly connected to a side wall of the mounting column (101) close to the bidirectional screw rod (105) and symmetrically arranged on the vertical center plane of the mounting column, and the four limiting blocks (116) are in contact with the rotating column (201).

5. The dustless writing device for environmental protection teaching according to claim 1, wherein the bottom of the protecting shell (117) is fixedly connected with a bearing seat (401), the central position of the bottom of the bearing seat (401) is fixedly connected with an adjusting seat (402), the bottom of the adjusting seat (402) is annularly and equidistantly rotated to be connected with one end of three supporting leg columns (403), and the other ends of the three supporting leg columns (403) are fixedly sleeved with an anti-slip sleeve (404).

6. The dustless writing device for environmental protection teaching according to claim 1, wherein, fixedly connected with cup joints post (118) on the lateral wall of protecting crust (117), cup joint post (118) central point put and offered round hole (119) that cup joint with pull rope (113) mutually, fixedly connected with mount (120) on the lateral wall of cup jointing post (118), fixed mount (120) central point put and put sliding connection have toggle rod (121), the one end fixedly connected with of toggle rod (121) with cup joint post (118) gliding spacing post (122), the one end of spacing post (122) is inconsistent joint with pull rope (113), the other end fixedly connected with of spacing post (122) is with extrusion spring (123) that fixed mount (120) mutually, extrusion spring (123) cup joint with toggle rod (121) mutually.